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Diffstat (limited to 'sys/contrib/octeon-sdk/cvmx-usb.c')
| -rw-r--r-- | sys/contrib/octeon-sdk/cvmx-usb.c | 3457 |
1 files changed, 3457 insertions, 0 deletions
diff --git a/sys/contrib/octeon-sdk/cvmx-usb.c b/sys/contrib/octeon-sdk/cvmx-usb.c new file mode 100644 index 000000000000..4124ac8ecf3b --- /dev/null +++ b/sys/contrib/octeon-sdk/cvmx-usb.c @@ -0,0 +1,3457 @@ +/***********************license start*************** + * Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights + * reserved. + * + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + + * * Neither the name of Cavium Inc. nor the names of + * its contributors may be used to endorse or promote products + * derived from this software without specific prior written + * permission. + + * This Software, including technical data, may be subject to U.S. export control + * laws, including the U.S. Export Administration Act and its associated + * regulations, and may be subject to export or import regulations in other + * countries. + + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" + * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR + * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO + * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR + * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM + * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, + * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF + * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR + * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR + * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. + ***********************license end**************************************/ + + +/** + * @file + * + * "cvmx-usb.c" defines a set of low level USB functions to help + * developers create Octeon USB drivers for various operating + * systems. These functions provide a generic API to the Octeon + * USB blocks, hiding the internal hardware specific + * operations. + * + * <hr>$Revision: 32636 $<hr> + */ +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +#include <asm/octeon/cvmx.h> +#include <asm/octeon/cvmx-clock.h> +#include <asm/octeon/cvmx-sysinfo.h> +#include <asm/octeon/cvmx-usbnx-defs.h> +#include <asm/octeon/cvmx-usbcx-defs.h> +#include <asm/octeon/cvmx-usb.h> +#include <asm/octeon/cvmx-helper.h> +#include <asm/octeon/cvmx-helper-board.h> +#include <asm/octeon/cvmx-swap.h> +#if 0 + /* Do not use cvmx-error.h for now. When the cvmx-error.h is properly + * ported, remove the above #if 0, and all #ifdef __CVMX_ERROR_H__ within + * this file */ + #include <asm/octeon/cvmx-error.h> +#endif +#else +#include "cvmx.h" +#include "cvmx-clock.h" +#include "cvmx-sysinfo.h" +#include "cvmx-usb.h" +#include "cvmx-helper.h" +#include "cvmx-helper-board.h" +#if !defined(CVMX_BUILD_FOR_FREEBSD_KERNEL) +#include "cvmx-csr-db.h" +#endif +#include "cvmx-swap.h" +#if !defined(CVMX_BUILD_FOR_FREEBSD_KERNEL) +#include "cvmx-error.h" +#endif +#endif + +#define MAX_RETRIES 3 /* Maximum number of times to retry failed transactions */ +#define MAX_PIPES 32 /* Maximum number of pipes that can be open at once */ +#define MAX_TRANSACTIONS 256 /* Maximum number of outstanding transactions across all pipes */ +#define MAX_CHANNELS 8 /* Maximum number of hardware channels supported by the USB block */ +#define MAX_USB_ADDRESS 127 /* The highest valid USB device address */ +#define MAX_USB_ENDPOINT 15 /* The highest valid USB endpoint number */ +#define MAX_USB_HUB_PORT 15 /* The highest valid port number on a hub */ +#define MAX_TRANSFER_BYTES ((1<<19)-1) /* The low level hardware can transfer a maximum of this number of bytes in each transfer. The field is 19 bits wide */ +#define MAX_TRANSFER_PACKETS ((1<<10)-1) /* The low level hardware can transfer a maximum of this number of packets in each transfer. The field is 10 bits wide */ +#define ALLOW_CSR_DECODES 0 /* CSR decoding when CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS is set + enlarges the code a lot. This define overrides the ability to do CSR + decoding since it isn't necessary 99% of the time. Change this to a + one if you need CSR decoding */ + +/* These defines disable the normal read and write csr. This is so I can add + extra debug stuff to the usb specific version and I won't use the normal + version by mistake */ +#define cvmx_read_csr use_cvmx_usb_read_csr64_instead_of_cvmx_read_csr +#define cvmx_write_csr use_cvmx_usb_write_csr64_instead_of_cvmx_write_csr + +typedef enum +{ + __CVMX_USB_TRANSACTION_FLAGS_IN_USE = 1<<16, +} cvmx_usb_transaction_flags_t; + +/** + * Logical transactions may take numerous low level + * transactions, especially when splits are concerned. This + * enum represents all of the possible stages a transaction can + * be in. Note that split completes are always even. This is so + * the NAK handler can backup to the previous low level + * transaction with a simple clearing of bit 0. + */ +typedef enum +{ + CVMX_USB_STAGE_NON_CONTROL, + CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE, + CVMX_USB_STAGE_SETUP, + CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE, + CVMX_USB_STAGE_DATA, + CVMX_USB_STAGE_DATA_SPLIT_COMPLETE, + CVMX_USB_STAGE_STATUS, + CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE, +} cvmx_usb_stage_t; + +/** + * This structure describes each pending USB transaction + * regardless of type. These are linked together to form a list + * of pending requests for a pipe. + */ +typedef struct cvmx_usb_transaction +{ + struct cvmx_usb_transaction *prev; /**< Transaction before this one in the pipe */ + struct cvmx_usb_transaction *next; /**< Transaction after this one in the pipe */ + cvmx_usb_transfer_t type; /**< Type of transaction, duplicated of the pipe */ + cvmx_usb_transaction_flags_t flags; /**< State flags for this transaction */ + uint64_t buffer; /**< User's physical buffer address to read/write */ + int buffer_length; /**< Size of the user's buffer in bytes */ + uint64_t control_header; /**< For control transactions, physical address of the 8 byte standard header */ + int iso_start_frame; /**< For ISO transactions, the starting frame number */ + int iso_number_packets; /**< For ISO transactions, the number of packets in the request */ + cvmx_usb_iso_packet_t *iso_packets; /**< For ISO transactions, the sub packets in the request */ + int xfersize; + int pktcnt; + int retries; + int actual_bytes; /**< Actual bytes transfer for this transaction */ + cvmx_usb_stage_t stage; /**< For control transactions, the current stage */ + cvmx_usb_callback_func_t callback; /**< User's callback function when complete */ + void *callback_data; /**< User's data */ +} cvmx_usb_transaction_t; + +/** + * A pipe represents a virtual connection between Octeon and some + * USB device. It contains a list of pending request to the device. + */ +typedef struct cvmx_usb_pipe +{ + struct cvmx_usb_pipe *prev; /**< Pipe before this one in the list */ + struct cvmx_usb_pipe *next; /**< Pipe after this one in the list */ + cvmx_usb_transaction_t *head; /**< The first pending transaction */ + cvmx_usb_transaction_t *tail; /**< The last pending transaction */ + uint64_t interval; /**< For periodic pipes, the interval between packets in frames */ + uint64_t next_tx_frame; /**< The next frame this pipe is allowed to transmit on */ + cvmx_usb_pipe_flags_t flags; /**< State flags for this pipe */ + cvmx_usb_speed_t device_speed; /**< Speed of device connected to this pipe */ + cvmx_usb_transfer_t transfer_type; /**< Type of transaction supported by this pipe */ + cvmx_usb_direction_t transfer_dir; /**< IN or OUT. Ignored for Control */ + int multi_count; /**< Max packet in a row for the device */ + uint16_t max_packet; /**< The device's maximum packet size in bytes */ + uint8_t device_addr; /**< USB device address at other end of pipe */ + uint8_t endpoint_num; /**< USB endpoint number at other end of pipe */ + uint8_t hub_device_addr; /**< Hub address this device is connected to */ + uint8_t hub_port; /**< Hub port this device is connected to */ + uint8_t pid_toggle; /**< This toggles between 0/1 on every packet send to track the data pid needed */ + uint8_t channel; /**< Hardware DMA channel for this pipe */ + int8_t split_sc_frame; /**< The low order bits of the frame number the split complete should be sent on */ +} cvmx_usb_pipe_t; + +typedef struct +{ + cvmx_usb_pipe_t *head; /**< Head of the list, or NULL if empty */ + cvmx_usb_pipe_t *tail; /**< Tail if the list, or NULL if empty */ +} cvmx_usb_pipe_list_t; + +typedef struct +{ + struct + { + int channel; + int size; + uint64_t address; + } entry[MAX_CHANNELS+1]; + int head; + int tail; +} cvmx_usb_tx_fifo_t; + +/** + * The state of the USB block is stored in this structure + */ +typedef struct +{ + int init_flags; /**< Flags passed to initialize */ + int index; /**< Which USB block this is for */ + int idle_hardware_channels; /**< Bit set for every idle hardware channel */ + cvmx_usbcx_hprt_t usbcx_hprt; /**< Stored port status so we don't need to read a CSR to determine splits */ + cvmx_usb_pipe_t *pipe_for_channel[MAX_CHANNELS]; /**< Map channels to pipes */ + cvmx_usb_transaction_t *free_transaction_head; /**< List of free transactions head */ + cvmx_usb_transaction_t *free_transaction_tail; /**< List of free transactions tail */ + cvmx_usb_pipe_t pipe[MAX_PIPES]; /**< Storage for pipes */ + cvmx_usb_transaction_t transaction[MAX_TRANSACTIONS]; /**< Storage for transactions */ + cvmx_usb_callback_func_t callback[__CVMX_USB_CALLBACK_END]; /**< User global callbacks */ + void *callback_data[__CVMX_USB_CALLBACK_END]; /**< User data for each callback */ + int indent; /**< Used by debug output to indent functions */ + cvmx_usb_port_status_t port_status; /**< Last port status used for change notification */ + cvmx_usb_pipe_list_t free_pipes; /**< List of all pipes that are currently closed */ + cvmx_usb_pipe_list_t idle_pipes; /**< List of open pipes that have no transactions */ + cvmx_usb_pipe_list_t active_pipes[4]; /**< Active pipes indexed by transfer type */ + uint64_t frame_number; /**< Increments every SOF interrupt for time keeping */ + cvmx_usb_transaction_t *active_split; /**< Points to the current active split, or NULL */ + cvmx_usb_tx_fifo_t periodic; + cvmx_usb_tx_fifo_t nonperiodic; +} cvmx_usb_internal_state_t; + +/* This macro logs out whenever a function is called if debugging is on */ +#define CVMX_USB_LOG_CALLED() \ + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLS)) \ + cvmx_dprintf("%*s%s: called\n", 2*usb->indent++, "", __FUNCTION__); + +/* This macro logs out each function parameter if debugging is on */ +#define CVMX_USB_LOG_PARAM(format, param) \ + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLS)) \ + cvmx_dprintf("%*s%s: param %s = " format "\n", 2*usb->indent, "", __FUNCTION__, #param, param); + +/* This macro logs out when a function returns a value */ +#define CVMX_USB_RETURN(v) \ + do { \ + __typeof(v) r = v; \ + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLS)) \ + cvmx_dprintf("%*s%s: returned %s(%d)\n", 2*--usb->indent, "", __FUNCTION__, #v, r); \ + return r; \ + } while (0); + +/* This macro logs out when a function doesn't return a value */ +#define CVMX_USB_RETURN_NOTHING() \ + do { \ + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLS)) \ + cvmx_dprintf("%*s%s: returned\n", 2*--usb->indent, "", __FUNCTION__); \ + return; \ + } while (0); + +/* This macro spins on a field waiting for it to reach a value */ +#define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\ + ({int result; \ + do { \ + uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \ + cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000000; \ + type c; \ + while (1) \ + { \ + c.u32 = __cvmx_usb_read_csr32(usb, address); \ + if (c.s.field op (value)) { \ + result = 0; \ + break; \ + } else if (cvmx_get_cycle() > done) { \ + result = -1; \ + break; \ + } else \ + cvmx_wait(100); \ + } \ + } while (0); \ + result;}) + +/* This macro logically sets a single field in a CSR. It does the sequence + read, modify, and write */ +#define USB_SET_FIELD32(address, type, field, value)\ + do { \ + type c; \ + c.u32 = __cvmx_usb_read_csr32(usb, address);\ + c.s.field = value; \ + __cvmx_usb_write_csr32(usb, address, c.u32);\ + } while (0) + +/* Returns the IO address to push/pop stuff data from the FIFOs */ +#define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000) + +/** + * @INTERNAL + * Read a USB 32bit CSR. It performs the necessary address swizzle + * for 32bit CSRs and logs the value in a readable format if + * debugging is on. + * + * @param usb USB block this access is for + * @param address 64bit address to read + * + * @return Result of the read + */ +static inline uint32_t __cvmx_usb_read_csr32(cvmx_usb_internal_state_t *usb, + uint64_t address) +{ + uint32_t result = cvmx_read64_uint32(address ^ 4); +#if ALLOW_CSR_DECODES + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS)) + { + cvmx_dprintf("Read: "); + cvmx_csr_db_decode(cvmx_get_proc_id(), address, result); + } +#endif + return result; +} + + +/** + * @INTERNAL + * Write a USB 32bit CSR. It performs the necessary address + * swizzle for 32bit CSRs and logs the value in a readable format + * if debugging is on. + * + * @param usb USB block this access is for + * @param address 64bit address to write + * @param value Value to write + */ +static inline void __cvmx_usb_write_csr32(cvmx_usb_internal_state_t *usb, + uint64_t address, uint32_t value) +{ +#if ALLOW_CSR_DECODES + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS)) + { + cvmx_dprintf("Write: "); + cvmx_csr_db_decode(cvmx_get_proc_id(), address, value); + } +#endif + cvmx_write64_uint32(address ^ 4, value); + cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); +} + + +/** + * @INTERNAL + * Read a USB 64bit CSR. It logs the value in a readable format if + * debugging is on. + * + * @param usb USB block this access is for + * @param address 64bit address to read + * + * @return Result of the read + */ +static inline uint64_t __cvmx_usb_read_csr64(cvmx_usb_internal_state_t *usb, + uint64_t address) +{ + uint64_t result = cvmx_read64_uint64(address); +#if ALLOW_CSR_DECODES + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS)) + { + cvmx_dprintf("Read: "); + cvmx_csr_db_decode(cvmx_get_proc_id(), address, result); + } +#endif + return result; +} + + +/** + * @INTERNAL + * Write a USB 64bit CSR. It logs the value in a readable format + * if debugging is on. + * + * @param usb USB block this access is for + * @param address 64bit address to write + * @param value Value to write + */ +static inline void __cvmx_usb_write_csr64(cvmx_usb_internal_state_t *usb, + uint64_t address, uint64_t value) +{ +#if ALLOW_CSR_DECODES + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS)) + { + cvmx_dprintf("Write: "); + cvmx_csr_db_decode(cvmx_get_proc_id(), address, value); + } +#endif + cvmx_write64_uint64(address, value); +} + + +/** + * @INTERNAL + * Utility function to convert complete codes into strings + * + * @param complete_code + * Code to convert + * + * @return Human readable string + */ +static const char *__cvmx_usb_complete_to_string(cvmx_usb_complete_t complete_code) +{ + switch (complete_code) + { + case CVMX_USB_COMPLETE_SUCCESS: return "SUCCESS"; + case CVMX_USB_COMPLETE_SHORT: return "SHORT"; + case CVMX_USB_COMPLETE_CANCEL: return "CANCEL"; + case CVMX_USB_COMPLETE_ERROR: return "ERROR"; + case CVMX_USB_COMPLETE_STALL: return "STALL"; + case CVMX_USB_COMPLETE_XACTERR: return "XACTERR"; + case CVMX_USB_COMPLETE_DATATGLERR: return "DATATGLERR"; + case CVMX_USB_COMPLETE_BABBLEERR: return "BABBLEERR"; + case CVMX_USB_COMPLETE_FRAMEERR: return "FRAMEERR"; + } + return "Update __cvmx_usb_complete_to_string"; +} + + +/** + * @INTERNAL + * Return non zero if this pipe connects to a non HIGH speed + * device through a high speed hub. + * + * @param usb USB block this access is for + * @param pipe Pipe to check + * + * @return Non zero if we need to do split transactions + */ +static inline int __cvmx_usb_pipe_needs_split(cvmx_usb_internal_state_t *usb, cvmx_usb_pipe_t *pipe) +{ + return ((pipe->device_speed != CVMX_USB_SPEED_HIGH) && (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH)); +} + + +/** + * @INTERNAL + * Trivial utility function to return the correct PID for a pipe + * + * @param pipe pipe to check + * + * @return PID for pipe + */ +static inline int __cvmx_usb_get_data_pid(cvmx_usb_pipe_t *pipe) +{ + if (pipe->pid_toggle) + return 2; /* Data1 */ + else + return 0; /* Data0 */ +} + + +/** + * Return the number of USB ports supported by this Octeon + * chip. If the chip doesn't support USB, or is not supported + * by this API, a zero will be returned. Most Octeon chips + * support one usb port, but some support two ports. + * cvmx_usb_initialize() must be called on independent + * cvmx_usb_state_t structures. + * + * This utilizes cvmx_helper_board_usb_get_num_ports() + * to get any board specific variations. + * + * @return Number of port, zero if usb isn't supported + */ +int cvmx_usb_get_num_ports(void) +{ + int arch_ports = 0; + + if (OCTEON_IS_MODEL(OCTEON_CN56XX)) + arch_ports = 1; + else if (OCTEON_IS_MODEL(OCTEON_CN52XX)) + arch_ports = 2; + else if (OCTEON_IS_MODEL(OCTEON_CN50XX)) + arch_ports = 1; + else if (OCTEON_IS_MODEL(OCTEON_CN31XX)) + arch_ports = 1; + else if (OCTEON_IS_MODEL(OCTEON_CN30XX)) + arch_ports = 1; + else + arch_ports = 0; + + return __cvmx_helper_board_usb_get_num_ports(arch_ports); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_get_num_ports); +#endif + + +/** + * @INTERNAL + * Allocate a usb transaction for use + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * + * @return Transaction or NULL + */ +static inline cvmx_usb_transaction_t *__cvmx_usb_alloc_transaction(cvmx_usb_internal_state_t *usb) +{ + cvmx_usb_transaction_t *t; + t = usb->free_transaction_head; + if (t) + { + usb->free_transaction_head = t->next; + if (!usb->free_transaction_head) + usb->free_transaction_tail = NULL; + } + else if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO)) + cvmx_dprintf("%s: Failed to allocate a transaction\n", __FUNCTION__); + if (t) + { + memset(t, 0, sizeof(*t)); + t->flags = __CVMX_USB_TRANSACTION_FLAGS_IN_USE; + } + return t; +} + + +/** + * @INTERNAL + * Free a usb transaction + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param transaction + * Transaction to free + */ +static inline void __cvmx_usb_free_transaction(cvmx_usb_internal_state_t *usb, + cvmx_usb_transaction_t *transaction) +{ + transaction->flags = 0; + transaction->prev = NULL; + transaction->next = NULL; + if (usb->free_transaction_tail) + usb->free_transaction_tail->next = transaction; + else + usb->free_transaction_head = transaction; + usb->free_transaction_tail = transaction; +} + + +/** + * @INTERNAL + * Add a pipe to the tail of a list + * @param list List to add pipe to + * @param pipe Pipe to add + */ +static inline void __cvmx_usb_append_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_pipe_t *pipe) +{ + pipe->next = NULL; + pipe->prev = list->tail; + if (list->tail) + list->tail->next = pipe; + else + list->head = pipe; + list->tail = pipe; +} + + +/** + * @INTERNAL + * Remove a pipe from a list + * @param list List to remove pipe from + * @param pipe Pipe to remove + */ +static inline void __cvmx_usb_remove_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_pipe_t *pipe) +{ + if (list->head == pipe) + { + list->head = pipe->next; + pipe->next = NULL; + if (list->head) + list->head->prev = NULL; + else + list->tail = NULL; + } + else if (list->tail == pipe) + { + list->tail = pipe->prev; + list->tail->next = NULL; + pipe->prev = NULL; + } + else + { + pipe->prev->next = pipe->next; + pipe->next->prev = pipe->prev; + pipe->prev = NULL; + pipe->next = NULL; + } +} + + +/** + * Initialize a USB port for use. This must be called before any + * other access to the Octeon USB port is made. The port starts + * off in the disabled state. + * + * @param state Pointer to an empty cvmx_usb_state_t structure + * that will be populated by the initialize call. + * This structure is then passed to all other USB + * functions. + * @param usb_port_number + * Which Octeon USB port to initialize. + * @param flags Flags to control hardware initialization. See + * cvmx_usb_initialize_flags_t for the flag + * definitions. Some flags are mandatory. + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_initialize(cvmx_usb_state_t *state, + int usb_port_number, + cvmx_usb_initialize_flags_t flags) +{ + cvmx_usbnx_clk_ctl_t usbn_clk_ctl; + cvmx_usbnx_usbp_ctl_status_t usbn_usbp_ctl_status; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + usb->init_flags = flags; + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", usb_port_number); + CVMX_USB_LOG_PARAM("0x%x", flags); + + /* Make sure that state is large enough to store the internal state */ + if (sizeof(*state) < sizeof(*usb)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + /* At first allow 0-1 for the usb port number */ + if ((usb_port_number < 0) || (usb_port_number > 1)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + /* For all chips except 52XX there is only one port */ + if (!OCTEON_IS_MODEL(OCTEON_CN52XX) && (usb_port_number > 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + /* Try to determine clock type automatically */ + if ((flags & (CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI | + CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND)) == 0) + { + if (__cvmx_helper_board_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12) + flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; /* Only 12 MHZ crystals are supported */ + else + flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND; + } + + if (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) + { + /* Check for auto ref clock frequency */ + if (!(flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK)) + switch (__cvmx_helper_board_usb_get_clock_type()) + { + case USB_CLOCK_TYPE_REF_12: + flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ; + break; + case USB_CLOCK_TYPE_REF_24: + flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ; + break; + case USB_CLOCK_TYPE_REF_48: + flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ; + break; + default: + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + break; + } + } + + memset(usb, 0, sizeof(*usb)); + usb->init_flags = flags; + + /* Initialize the USB state structure */ + { + int i; + usb->index = usb_port_number; + + /* Initialize the transaction double linked list */ + usb->free_transaction_head = NULL; + usb->free_transaction_tail = NULL; + for (i=0; i<MAX_TRANSACTIONS; i++) + __cvmx_usb_free_transaction(usb, usb->transaction + i); + for (i=0; i<MAX_PIPES; i++) + __cvmx_usb_append_pipe(&usb->free_pipes, usb->pipe + i); + } + + /* Power On Reset and PHY Initialization */ + + /* 1. Wait for DCOK to assert (nothing to do) */ + /* 2a. Write USBN0/1_CLK_CTL[POR] = 1 and + USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 */ + usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); + usbn_clk_ctl.s.por = 1; + usbn_clk_ctl.s.hrst = 0; + usbn_clk_ctl.s.prst = 0; + usbn_clk_ctl.s.hclk_rst = 0; + usbn_clk_ctl.s.enable = 0; + /* 2b. Select the USB reference clock/crystal parameters by writing + appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] */ + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) + { + /* The USB port uses 12/24/48MHz 2.5V board clock + source at USB_XO. USB_XI should be tied to GND. + Most Octeon evaluation boards require this setting */ + if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) + { + usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */ + usbn_clk_ctl.cn31xx.p_xenbn = 0; + } + else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) + usbn_clk_ctl.cn56xx.p_rtype = 2; /* From CN56XX,CN50XX manual */ + else + usbn_clk_ctl.cn52xx.p_rtype = 1; /* From CN52XX manual */ + + switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) + { + case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: + usbn_clk_ctl.s.p_c_sel = 0; + break; + case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: + usbn_clk_ctl.s.p_c_sel = 1; + break; + case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: + usbn_clk_ctl.s.p_c_sel = 2; + break; + } + } + else + { + /* The USB port uses a 12MHz crystal as clock source + at USB_XO and USB_XI */ + if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) + { + usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */ + usbn_clk_ctl.cn31xx.p_xenbn = 1; + } + else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) + usbn_clk_ctl.cn56xx.p_rtype = 0; /* From CN56XX,CN50XX manual */ + else + usbn_clk_ctl.cn52xx.p_rtype = 0; /* From CN52XX manual */ + + usbn_clk_ctl.s.p_c_sel = 0; + } + /* 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and + setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down such + that USB is as close as possible to 125Mhz */ + { + int divisor = (cvmx_clock_get_rate(CVMX_CLOCK_CORE)+125000000-1)/125000000; + if (divisor < 4) /* Lower than 4 doesn't seem to work properly */ + divisor = 4; + usbn_clk_ctl.s.divide = divisor; + usbn_clk_ctl.s.divide2 = 0; + } + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */ + usbn_clk_ctl.s.hclk_rst = 1; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */ + cvmx_wait(64); + /* 3. Program the power-on reset field in the USBN clock-control register: + USBN_CLK_CTL[POR] = 0 */ + usbn_clk_ctl.s.por = 0; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + /* 4. Wait 1 ms for PHY clock to start */ + cvmx_wait_usec(1000); + /* 5. Program the Reset input from automatic test equipment field in the + USBP control and status register: USBN_USBP_CTL_STATUS[ATE_RESET] = 1 */ + usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index)); + usbn_usbp_ctl_status.s.ate_reset = 1; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), + usbn_usbp_ctl_status.u64); + /* 6. Wait 10 cycles */ + cvmx_wait(10); + /* 7. Clear ATE_RESET field in the USBN clock-control register: + USBN_USBP_CTL_STATUS[ATE_RESET] = 0 */ + usbn_usbp_ctl_status.s.ate_reset = 0; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), + usbn_usbp_ctl_status.u64); + /* 8. Program the PHY reset field in the USBN clock-control register: + USBN_CLK_CTL[PRST] = 1 */ + usbn_clk_ctl.s.prst = 1; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + /* 9. Program the USBP control and status register to select host or + device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for + device */ + usbn_usbp_ctl_status.s.hst_mode = 0; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), + usbn_usbp_ctl_status.u64); + /* 10. Wait 1 µs */ + cvmx_wait_usec(1); + /* 11. Program the hreset_n field in the USBN clock-control register: + USBN_CLK_CTL[HRST] = 1 */ + usbn_clk_ctl.s.hrst = 1; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + /* 12. Proceed to USB core initialization */ + usbn_clk_ctl.s.enable = 1; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + cvmx_wait_usec(1); + + /* USB Core Initialization */ + + /* 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to + determine USB core configuration parameters. */ + /* Nothing needed */ + /* 2. Program the following fields in the global AHB configuration + register (USBC_GAHBCFG) + DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode + Burst length, USBC_GAHBCFG[HBSTLEN] = 0 + Nonperiodic TxFIFO empty level (slave mode only), + USBC_GAHBCFG[NPTXFEMPLVL] + Periodic TxFIFO empty level (slave mode only), + USBC_GAHBCFG[PTXFEMPLVL] + Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 */ + { + cvmx_usbcx_gahbcfg_t usbcx_gahbcfg; + /* Due to an errata, CN31XX doesn't support DMA */ + if (OCTEON_IS_MODEL(OCTEON_CN31XX)) + usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA; + usbcx_gahbcfg.u32 = 0; + usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA); + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + usb->idle_hardware_channels = 0x1; /* Only use one channel with non DMA */ + else if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) + usb->idle_hardware_channels = 0xf7; /* CN5XXX have an errata with channel 3 */ + else + usb->idle_hardware_channels = 0xff; + usbcx_gahbcfg.s.hbstlen = 0; + usbcx_gahbcfg.s.nptxfemplvl = 1; + usbcx_gahbcfg.s.ptxfemplvl = 1; + usbcx_gahbcfg.s.glblintrmsk = 1; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index), + usbcx_gahbcfg.u32); + } + /* 3. Program the following fields in USBC_GUSBCFG register. + HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0 + ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0 + USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5 + PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 */ + { + cvmx_usbcx_gusbcfg_t usbcx_gusbcfg; + usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index)); + usbcx_gusbcfg.s.toutcal = 0; + usbcx_gusbcfg.s.ddrsel = 0; + usbcx_gusbcfg.s.usbtrdtim = 0x5; + usbcx_gusbcfg.s.phylpwrclksel = 0; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index), + usbcx_gusbcfg.u32); + } + /* 4. The software must unmask the following bits in the USBC_GINTMSK + register. + OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1 + Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 */ + { + cvmx_usbcx_gintmsk_t usbcx_gintmsk; + int channel; + + usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index)); + usbcx_gintmsk.s.otgintmsk = 1; + usbcx_gintmsk.s.modemismsk = 1; + usbcx_gintmsk.s.hchintmsk = 1; + usbcx_gintmsk.s.sofmsk = 0; + /* We need RX FIFO interrupts if we don't have DMA */ + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + usbcx_gintmsk.s.rxflvlmsk = 1; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index), + usbcx_gintmsk.u32); + + /* Disable all channel interrupts. We'll enable them per channel later */ + for (channel=0; channel<8; channel++) + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); + } + + { + /* Host Port Initialization */ + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO)) + cvmx_dprintf("%s: USB%d is in host mode\n", __FUNCTION__, usb->index); + + /* 1. Program the host-port interrupt-mask field to unmask, + USBC_GINTMSK[PRTINT] = 1 */ + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, + prtintmsk, 1); + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, + disconnintmsk, 1); + /* 2. Program the USBC_HCFG register to select full-speed host or + high-speed host. */ + { + cvmx_usbcx_hcfg_t usbcx_hcfg; + usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index)); + usbcx_hcfg.s.fslssupp = 0; + usbcx_hcfg.s.fslspclksel = 0; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32); + } + /* 3. Program the port power bit to drive VBUS on the USB, + USBC_HPRT[PRTPWR] = 1 */ + USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtpwr, 1); + + /* Steps 4-15 from the manual are done later in the port enable */ + } + +#ifdef __CVMX_ERROR_H__ + cvmx_error_enable_group(CVMX_ERROR_GROUP_USB, usb->index); +#endif + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_initialize); +#endif + + +/** + * Shutdown a USB port after a call to cvmx_usb_initialize(). + * The port should be disabled with all pipes closed when this + * function is called. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_shutdown(cvmx_usb_state_t *state) +{ + cvmx_usbnx_clk_ctl_t usbn_clk_ctl; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + + /* Make sure all pipes are closed */ + if (usb->idle_pipes.head || + usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head || + usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head || + usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head || + usb->active_pipes[CVMX_USB_TRANSFER_BULK].head) + CVMX_USB_RETURN(CVMX_USB_BUSY); + +#ifdef __CVMX_ERROR_H__ + cvmx_error_disable_group(CVMX_ERROR_GROUP_USB, usb->index); +#endif + + /* Disable the clocks and put them in power on reset */ + usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); + usbn_clk_ctl.s.enable = 1; + usbn_clk_ctl.s.por = 1; + usbn_clk_ctl.s.hclk_rst = 1; + usbn_clk_ctl.s.prst = 0; + usbn_clk_ctl.s.hrst = 0; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), + usbn_clk_ctl.u64); + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_shutdown); +#endif + + +/** + * Enable a USB port. After this call succeeds, the USB port is + * online and servicing requests. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_enable(cvmx_usb_state_t *state) +{ + cvmx_usbcx_ghwcfg3_t usbcx_ghwcfg3; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + + usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); + + /* If the port is already enabled the just return. We don't need to do + anything */ + if (usb->usbcx_hprt.s.prtena) + CVMX_USB_RETURN(CVMX_USB_SUCCESS); + + /* If there is nothing plugged into the port then fail immediately */ + if (!usb->usbcx_hprt.s.prtconnsts) + { + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO)) + cvmx_dprintf("%s: USB%d Nothing plugged into the port\n", __FUNCTION__, usb->index); + CVMX_USB_RETURN(CVMX_USB_TIMEOUT); + } + + /* Program the port reset bit to start the reset process */ + USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtrst, 1); + + /* Wait at least 50ms (high speed), or 10ms (full speed) for the reset + process to complete. */ + cvmx_wait_usec(50000); + + /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */ + USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtrst, 0); + + /* Wait for the USBC_HPRT[PRTENA]. */ + if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, + prtena, ==, 1, 100000)) + { + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO)) + cvmx_dprintf("%s: Timeout waiting for the port to finish reset\n", + __FUNCTION__); + CVMX_USB_RETURN(CVMX_USB_TIMEOUT); + } + + /* Read the port speed field to get the enumerated speed, USBC_HPRT[PRTSPD]. */ + usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO)) + cvmx_dprintf("%s: USB%d is in %s speed mode\n", __FUNCTION__, usb->index, + (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH) ? "high" : + (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_FULL) ? "full" : + "low"); + + usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index)); + + /* 13. Program the USBC_GRXFSIZ register to select the size of the receive + FIFO (25%). */ + USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), cvmx_usbcx_grxfsiz_t, + rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4); + /* 14. Program the USBC_GNPTXFSIZ register to select the size and the + start address of the non- periodic transmit FIFO for nonperiodic + transactions (50%). */ + { + cvmx_usbcx_gnptxfsiz_t siz; + siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index)); + siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2; + siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32); + } + /* 15. Program the USBC_HPTXFSIZ register to select the size and start + address of the periodic transmit FIFO for periodic transactions (25%). */ + { + cvmx_usbcx_hptxfsiz_t siz; + siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index)); + siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4; + siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32); + } + /* Flush all FIFOs */ + USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, txfnum, 0x10); + USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, txfflsh, 1); + CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, + txfflsh, ==, 0, 100); + USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, rxfflsh, 1); + CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, + rxfflsh, ==, 0, 100); + + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_enable); +#endif + + +/** + * Disable a USB port. After this call the USB port will not + * generate data transfers and will not generate events. + * Transactions in process will fail and call their + * associated callbacks. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_disable(cvmx_usb_state_t *state) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + + /* Disable the port */ + USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtena, 1); + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_disable); +#endif + + +/** + * Get the current state of the USB port. Use this call to + * determine if the usb port has anything connected, is enabled, + * or has some sort of error condition. The return value of this + * call has "changed" bits to signal of the value of some fields + * have changed between calls. These "changed" fields are based + * on the last call to cvmx_usb_set_status(). In order to clear + * them, you must update the status through cvmx_usb_set_status(). + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * + * @return Port status information + */ +cvmx_usb_port_status_t cvmx_usb_get_status(cvmx_usb_state_t *state) +{ + cvmx_usbcx_hprt_t usbc_hprt; + cvmx_usb_port_status_t result; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + memset(&result, 0, sizeof(result)); + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + + usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); + result.port_enabled = usbc_hprt.s.prtena; + result.port_over_current = usbc_hprt.s.prtovrcurract; + result.port_powered = usbc_hprt.s.prtpwr; + result.port_speed = usbc_hprt.s.prtspd; + result.connected = usbc_hprt.s.prtconnsts; + result.connect_change = (result.connected != usb->port_status.connected); + + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLS)) + cvmx_dprintf("%*s%s: returned port enabled=%d, over_current=%d, powered=%d, speed=%d, connected=%d, connect_change=%d\n", + 2*(--usb->indent), "", __FUNCTION__, + result.port_enabled, + result.port_over_current, + result.port_powered, + result.port_speed, + result.connected, + result.connect_change); + return result; +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_get_status); +#endif + + +/** + * Set the current state of the USB port. The status is used as + * a reference for the "changed" bits returned by + * cvmx_usb_get_status(). Other than serving as a reference, the + * status passed to this function is not used. No fields can be + * changed through this call. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param port_status + * Port status to set, most like returned by cvmx_usb_get_status() + */ +void cvmx_usb_set_status(cvmx_usb_state_t *state, cvmx_usb_port_status_t port_status) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + usb->port_status = port_status; + CVMX_USB_RETURN_NOTHING(); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_set_status); +#endif + + +/** + * @INTERNAL + * Convert a USB transaction into a handle + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param transaction + * Transaction to get handle for + * + * @return Handle + */ +static inline int __cvmx_usb_get_submit_handle(cvmx_usb_internal_state_t *usb, + cvmx_usb_transaction_t *transaction) +{ + return ((unsigned long)transaction - (unsigned long)usb->transaction) / + sizeof(*transaction); +} + + +/** + * @INTERNAL + * Convert a USB pipe into a handle + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param pipe Pipe to get handle for + * + * @return Handle + */ +static inline int __cvmx_usb_get_pipe_handle(cvmx_usb_internal_state_t *usb, + cvmx_usb_pipe_t *pipe) +{ + return ((unsigned long)pipe - (unsigned long)usb->pipe) / sizeof(*pipe); +} + + +/** + * Open a virtual pipe between the host and a USB device. A pipe + * must be opened before data can be transferred between a device + * and Octeon. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param flags Optional pipe flags defined in + * cvmx_usb_pipe_flags_t. + * @param device_addr + * USB device address to open the pipe to + * (0-127). + * @param endpoint_num + * USB endpoint number to open the pipe to + * (0-15). + * @param device_speed + * The speed of the device the pipe is going + * to. This must match the device's speed, + * which may be different than the port speed. + * @param max_packet The maximum packet length the device can + * transmit/receive (low speed=0-8, full + * speed=0-1023, high speed=0-1024). This value + * comes from the standard endpoint descriptor + * field wMaxPacketSize bits <10:0>. + * @param transfer_type + * The type of transfer this pipe is for. + * @param transfer_dir + * The direction the pipe is in. This is not + * used for control pipes. + * @param interval For ISOCHRONOUS and INTERRUPT transfers, + * this is how often the transfer is scheduled + * for. All other transfers should specify + * zero. The units are in frames (8000/sec at + * high speed, 1000/sec for full speed). + * @param multi_count + * For high speed devices, this is the maximum + * allowed number of packet per microframe. + * Specify zero for non high speed devices. This + * value comes from the standard endpoint descriptor + * field wMaxPacketSize bits <12:11>. + * @param hub_device_addr + * Hub device address this device is connected + * to. Devices connected directly to Octeon + * use zero. This is only used when the device + * is full/low speed behind a high speed hub. + * The address will be of the high speed hub, + * not and full speed hubs after it. + * @param hub_port Which port on the hub the device is + * connected. Use zero for devices connected + * directly to Octeon. Like hub_device_addr, + * this is only used for full/low speed + * devices behind a high speed hub. + * + * @return A non negative value is a pipe handle. Negative + * values are failure codes from cvmx_usb_status_t. + */ +int cvmx_usb_open_pipe(cvmx_usb_state_t *state, cvmx_usb_pipe_flags_t flags, + int device_addr, int endpoint_num, + cvmx_usb_speed_t device_speed, int max_packet, + cvmx_usb_transfer_t transfer_type, + cvmx_usb_direction_t transfer_dir, int interval, + int multi_count, int hub_device_addr, int hub_port) +{ + cvmx_usb_pipe_t *pipe; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("0x%x", flags); + CVMX_USB_LOG_PARAM("%d", device_addr); + CVMX_USB_LOG_PARAM("%d", endpoint_num); + CVMX_USB_LOG_PARAM("%d", device_speed); + CVMX_USB_LOG_PARAM("%d", max_packet); + CVMX_USB_LOG_PARAM("%d", transfer_type); + CVMX_USB_LOG_PARAM("%d", transfer_dir); + CVMX_USB_LOG_PARAM("%d", interval); + CVMX_USB_LOG_PARAM("%d", multi_count); + CVMX_USB_LOG_PARAM("%d", hub_device_addr); + CVMX_USB_LOG_PARAM("%d", hub_port); + + if (cvmx_unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(device_speed > CVMX_USB_SPEED_LOW)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((max_packet <= 0) || (max_packet > 1024))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) && + (transfer_dir != CVMX_USB_DIRECTION_IN))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(interval < 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(multi_count < 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((device_speed != CVMX_USB_SPEED_HIGH) && + (multi_count != 0))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* Find a free pipe */ + pipe = usb->free_pipes.head; + if (!pipe) + CVMX_USB_RETURN(CVMX_USB_NO_MEMORY); + __cvmx_usb_remove_pipe(&usb->free_pipes, pipe); + pipe->flags = flags | __CVMX_USB_PIPE_FLAGS_OPEN; + if ((device_speed == CVMX_USB_SPEED_HIGH) && + (transfer_dir == CVMX_USB_DIRECTION_OUT) && + (transfer_type == CVMX_USB_TRANSFER_BULK)) + pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; + pipe->device_addr = device_addr; + pipe->endpoint_num = endpoint_num; + pipe->device_speed = device_speed; + pipe->max_packet = max_packet; + pipe->transfer_type = transfer_type; + pipe->transfer_dir = transfer_dir; + /* All pipes use interval to rate limit NAK processing. Force an interval + if one wasn't supplied */ + if (!interval) + interval = 1; + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + pipe->interval = interval*8; + /* Force start splits to be schedule on uFrame 0 */ + pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval; + } + else + { + pipe->interval = interval; + pipe->next_tx_frame = usb->frame_number + pipe->interval; + } + pipe->multi_count = multi_count; + pipe->hub_device_addr = hub_device_addr; + pipe->hub_port = hub_port; + pipe->pid_toggle = 0; + pipe->split_sc_frame = -1; + __cvmx_usb_append_pipe(&usb->idle_pipes, pipe); + + /* We don't need to tell the hardware about this pipe yet since + it doesn't have any submitted requests */ + + CVMX_USB_RETURN(__cvmx_usb_get_pipe_handle(usb, pipe)); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_open_pipe); +#endif + + +/** + * @INTERNAL + * Poll the RX FIFOs and remove data as needed. This function is only used + * in non DMA mode. It is very important that this function be called quickly + * enough to prevent FIFO overflow. + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + */ +static void __cvmx_usb_poll_rx_fifo(cvmx_usb_internal_state_t *usb) +{ + cvmx_usbcx_grxstsph_t rx_status; + int channel; + int bytes; + uint64_t address; + uint32_t *ptr; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + + rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index)); + /* Only read data if IN data is there */ + if (rx_status.s.pktsts != 2) + CVMX_USB_RETURN_NOTHING(); + /* Check if no data is available */ + if (!rx_status.s.bcnt) + CVMX_USB_RETURN_NOTHING(); + + channel = rx_status.s.chnum; + bytes = rx_status.s.bcnt; + if (!bytes) + CVMX_USB_RETURN_NOTHING(); + + /* Get where the DMA engine would have written this data */ + address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8); + ptr = cvmx_phys_to_ptr(address); + __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes); + + /* Loop writing the FIFO data for this packet into memory */ + while (bytes > 0) + { + *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index)); + bytes -= 4; + } + CVMX_SYNCW; + + CVMX_USB_RETURN_NOTHING(); +} + + +/** + * Fill the TX hardware fifo with data out of the software + * fifos + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param fifo Software fifo to use + * @param available Amount of space in the hardware fifo + * + * @return Non zero if the hardware fifo was too small and needs + * to be serviced again. + */ +static int __cvmx_usb_fill_tx_hw(cvmx_usb_internal_state_t *usb, cvmx_usb_tx_fifo_t *fifo, int available) +{ + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + CVMX_USB_LOG_PARAM("%p", fifo); + CVMX_USB_LOG_PARAM("%d", available); + + /* We're done either when there isn't anymore space or the software FIFO + is empty */ + while (available && (fifo->head != fifo->tail)) + { + int i = fifo->tail; + const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address); + uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4; + int words = available; + + /* Limit the amount of data to waht the SW fifo has */ + if (fifo->entry[i].size <= available) + { + words = fifo->entry[i].size; + fifo->tail++; + if (fifo->tail > MAX_CHANNELS) + fifo->tail = 0; + } + + /* Update the next locations and counts */ + available -= words; + fifo->entry[i].address += words * 4; + fifo->entry[i].size -= words; + + /* Write the HW fifo data. The read every three writes is due + to an errata on CN3XXX chips */ + while (words > 3) + { + cvmx_write64_uint32(csr_address, *ptr++); + cvmx_write64_uint32(csr_address, *ptr++); + cvmx_write64_uint32(csr_address, *ptr++); + cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); + words -= 3; + } + cvmx_write64_uint32(csr_address, *ptr++); + if (--words) + { + cvmx_write64_uint32(csr_address, *ptr++); + if (--words) + cvmx_write64_uint32(csr_address, *ptr++); + } + cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); + } + CVMX_USB_RETURN(fifo->head != fifo->tail); +} + + +/** + * Check the hardware FIFOs and fill them as needed + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + */ +static void __cvmx_usb_poll_tx_fifo(cvmx_usb_internal_state_t *usb) +{ + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + + if (usb->periodic.head != usb->periodic.tail) + { + cvmx_usbcx_hptxsts_t tx_status; + tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index)); + if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail)) + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, ptxfempmsk, 1); + else + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, ptxfempmsk, 0); + } + + if (usb->nonperiodic.head != usb->nonperiodic.tail) + { + cvmx_usbcx_gnptxsts_t tx_status; + tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index)); + if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail)) + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, nptxfempmsk, 1); + else + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, nptxfempmsk, 0); + } + + CVMX_USB_RETURN_NOTHING(); +} + + +/** + * @INTERNAL + * Fill the TX FIFO with an outgoing packet + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param channel Channel number to get packet from + */ +static void __cvmx_usb_fill_tx_fifo(cvmx_usb_internal_state_t *usb, int channel) +{ + cvmx_usbcx_hccharx_t hcchar; + cvmx_usbcx_hcspltx_t usbc_hcsplt; + cvmx_usbcx_hctsizx_t usbc_hctsiz; + cvmx_usb_tx_fifo_t *fifo; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + CVMX_USB_LOG_PARAM("%d", channel); + + /* We only need to fill data on outbound channels */ + hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); + if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT) + CVMX_USB_RETURN_NOTHING(); + + /* OUT Splits only have data on the start and not the complete */ + usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index)); + if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt) + CVMX_USB_RETURN_NOTHING(); + + /* Find out how many bytes we need to fill and convert it into 32bit words */ + usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); + if (!usbc_hctsiz.s.xfersize) + CVMX_USB_RETURN_NOTHING(); + + if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) || + (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS)) + fifo = &usb->periodic; + else + fifo = &usb->nonperiodic; + + fifo->entry[fifo->head].channel = channel; + fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8); + fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2; + fifo->head++; + if (fifo->head > MAX_CHANNELS) + fifo->head = 0; + + __cvmx_usb_poll_tx_fifo(usb); + + CVMX_USB_RETURN_NOTHING(); +} + +/** + * @INTERNAL + * Perform channel specific setup for Control transactions. All + * the generic stuff will already have been done in + * __cvmx_usb_start_channel() + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param channel Channel to setup + * @param pipe Pipe for control transaction + */ +static void __cvmx_usb_start_channel_control(cvmx_usb_internal_state_t *usb, + int channel, + cvmx_usb_pipe_t *pipe) +{ + cvmx_usb_transaction_t *transaction = pipe->head; + cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header); + int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes; + int packets_to_transfer; + cvmx_usbcx_hctsizx_t usbc_hctsiz; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + CVMX_USB_LOG_PARAM("%d", channel); + CVMX_USB_LOG_PARAM("%p", pipe); + + usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); + + switch (transaction->stage) + { + case CVMX_USB_STAGE_NON_CONTROL: + case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: + cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__); + break; + case CVMX_USB_STAGE_SETUP: + usbc_hctsiz.s.pid = 3; /* Setup */ + bytes_to_transfer = sizeof(*header); + /* All Control operations start with a setup going OUT */ + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, CVMX_USB_DIRECTION_OUT); + /* Setup send the control header instead of the buffer data. The + buffer data will be used in the next stage */ + __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header); + break; + case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: + usbc_hctsiz.s.pid = 3; /* Setup */ + bytes_to_transfer = 0; + /* All Control operations start with a setup going OUT */ + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, CVMX_USB_DIRECTION_OUT); + USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1); + break; + case CVMX_USB_STAGE_DATA: + usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + if (header->s.request_type & 0x80) + bytes_to_transfer = 0; + else if (bytes_to_transfer > pipe->max_packet) + bytes_to_transfer = pipe->max_packet; + } + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), + cvmx_usbcx_hccharx_t, epdir, + ((header->s.request_type & 0x80) ? + CVMX_USB_DIRECTION_IN : + CVMX_USB_DIRECTION_OUT)); + break; + case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: + usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); + if (!(header->s.request_type & 0x80)) + bytes_to_transfer = 0; + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), + cvmx_usbcx_hccharx_t, epdir, + ((header->s.request_type & 0x80) ? + CVMX_USB_DIRECTION_IN : + CVMX_USB_DIRECTION_OUT)); + USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1); + break; + case CVMX_USB_STAGE_STATUS: + usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); + bytes_to_transfer = 0; + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, + ((header->s.request_type & 0x80) ? + CVMX_USB_DIRECTION_OUT : + CVMX_USB_DIRECTION_IN)); + break; + case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: + usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); + bytes_to_transfer = 0; + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, + ((header->s.request_type & 0x80) ? + CVMX_USB_DIRECTION_OUT : + CVMX_USB_DIRECTION_IN)); + USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1); + break; + } + + /* Make sure the transfer never exceeds the byte limit of the hardware. + Further bytes will be sent as continued transactions */ + if (bytes_to_transfer > MAX_TRANSFER_BYTES) + { + /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */ + bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; + bytes_to_transfer *= pipe->max_packet; + } + + /* Calculate the number of packets to transfer. If the length is zero + we still need to transfer one packet */ + packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet; + if (packets_to_transfer == 0) + packets_to_transfer = 1; + else if ((packets_to_transfer>1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) + { + /* Limit to one packet when not using DMA. Channels must be restarted + between every packet for IN transactions, so there is no reason to + do multiple packets in a row */ + packets_to_transfer = 1; + bytes_to_transfer = packets_to_transfer * pipe->max_packet; + } + else if (packets_to_transfer > MAX_TRANSFER_PACKETS) + { + /* Limit the number of packet and data transferred to what the + hardware can handle */ + packets_to_transfer = MAX_TRANSFER_PACKETS; + bytes_to_transfer = packets_to_transfer * pipe->max_packet; + } + + usbc_hctsiz.s.xfersize = bytes_to_transfer; + usbc_hctsiz.s.pktcnt = packets_to_transfer; + + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32); + CVMX_USB_RETURN_NOTHING(); +} + + +/** + * @INTERNAL + * Start a channel to perform the pipe's head transaction + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param channel Channel to setup + * @param pipe Pipe to start + */ +static void __cvmx_usb_start_channel(cvmx_usb_internal_state_t *usb, + int channel, + cvmx_usb_pipe_t *pipe) +{ + cvmx_usb_transaction_t *transaction = pipe->head; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + CVMX_USB_LOG_PARAM("%d", channel); + CVMX_USB_LOG_PARAM("%p", pipe); + + if (cvmx_unlikely((usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS) || + (pipe->flags & CVMX_USB_PIPE_FLAGS_DEBUG_TRANSFERS))) + cvmx_dprintf("%s: Channel %d started. Pipe %d transaction %d stage %d\n", + __FUNCTION__, channel, __cvmx_usb_get_pipe_handle(usb, pipe), + __cvmx_usb_get_submit_handle(usb, transaction), + transaction->stage); + + /* Make sure all writes to the DMA region get flushed */ + CVMX_SYNCW; + + /* Attach the channel to the pipe */ + usb->pipe_for_channel[channel] = pipe; + pipe->channel = channel; + pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED; + + /* Mark this channel as in use */ + usb->idle_hardware_channels &= ~(1<<channel); + + /* Enable the channel interrupt bits */ + { + cvmx_usbcx_hcintx_t usbc_hcint; + cvmx_usbcx_hcintmskx_t usbc_hcintmsk; + cvmx_usbcx_haintmsk_t usbc_haintmsk; + + /* Clear all channel status bits */ + usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index)); + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32); + + usbc_hcintmsk.u32 = 0; + usbc_hcintmsk.s.chhltdmsk = 1; + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + { + /* Channels need these extra interrupts when we aren't in DMA mode */ + usbc_hcintmsk.s.datatglerrmsk = 1; + usbc_hcintmsk.s.frmovrunmsk = 1; + usbc_hcintmsk.s.bblerrmsk = 1; + usbc_hcintmsk.s.xacterrmsk = 1; + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + /* Splits don't generate xfercompl, so we need ACK and NYET */ + usbc_hcintmsk.s.nyetmsk = 1; + usbc_hcintmsk.s.ackmsk = 1; + } + usbc_hcintmsk.s.nakmsk = 1; + usbc_hcintmsk.s.stallmsk = 1; + usbc_hcintmsk.s.xfercomplmsk = 1; + } + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32); + + /* Enable the channel interrupt to propagate */ + usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index)); + usbc_haintmsk.s.haintmsk |= 1<<channel; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32); + } + + /* Setup the locations the DMA engines use */ + { + uint64_t dma_address = transaction->buffer + transaction->actual_bytes; + if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) + dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes; + __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address); + __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address); + } + + /* Setup both the size of the transfer and the SPLIT characteristics */ + { + cvmx_usbcx_hcspltx_t usbc_hcsplt = {.u32 = 0}; + cvmx_usbcx_hctsizx_t usbc_hctsiz = {.u32 = 0}; + int packets_to_transfer; + int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes; + + /* ISOCHRONOUS transactions store each individual transfer size in the + packet structure, not the global buffer_length */ + if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) + bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes; + + /* We need to do split transactions when we are talking to non high + speed devices that are behind a high speed hub */ + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + /* On the start split phase (stage is even) record the frame number we + will need to send the split complete. We only store the lower two bits + since the time ahead can only be two frames */ + if ((transaction->stage&1) == 0) + { + if (transaction->type == CVMX_USB_TRANSFER_BULK) + pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f; + else + pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f; + } + else + pipe->split_sc_frame = -1; + + usbc_hcsplt.s.spltena = 1; + usbc_hcsplt.s.hubaddr = pipe->hub_device_addr; + usbc_hcsplt.s.prtaddr = pipe->hub_port; + usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE); + + /* SPLIT transactions can only ever transmit one data packet so + limit the transfer size to the max packet size */ + if (bytes_to_transfer > pipe->max_packet) + bytes_to_transfer = pipe->max_packet; + + /* ISOCHRONOUS OUT splits are unique in that they limit + data transfers to 188 byte chunks representing the + begin/middle/end of the data or all */ + if (!usbc_hcsplt.s.compsplt && + (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) && + (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) + { + /* Clear the split complete frame number as there isn't going + to be a split complete */ + pipe->split_sc_frame = -1; + /* See if we've started this transfer and sent data */ + if (transaction->actual_bytes == 0) + { + /* Nothing sent yet, this is either a begin or the + entire payload */ + if (bytes_to_transfer <= 188) + usbc_hcsplt.s.xactpos = 3; /* Entire payload in one go */ + else + usbc_hcsplt.s.xactpos = 2; /* First part of payload */ + } + else + { + /* Continuing the previous data, we must either be + in the middle or at the end */ + if (bytes_to_transfer <= 188) + usbc_hcsplt.s.xactpos = 1; /* End of payload */ + else + usbc_hcsplt.s.xactpos = 0; /* Middle of payload */ + } + /* Again, the transfer size is limited to 188 bytes */ + if (bytes_to_transfer > 188) + bytes_to_transfer = 188; + } + } + + /* Make sure the transfer never exceeds the byte limit of the hardware. + Further bytes will be sent as continued transactions */ + if (bytes_to_transfer > MAX_TRANSFER_BYTES) + { + /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */ + bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; + bytes_to_transfer *= pipe->max_packet; + } + + /* Calculate the number of packets to transfer. If the length is zero + we still need to transfer one packet */ + packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet; + if (packets_to_transfer == 0) + packets_to_transfer = 1; + else if ((packets_to_transfer>1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) + { + /* Limit to one packet when not using DMA. Channels must be restarted + between every packet for IN transactions, so there is no reason to + do multiple packets in a row */ + packets_to_transfer = 1; + bytes_to_transfer = packets_to_transfer * pipe->max_packet; + } + else if (packets_to_transfer > MAX_TRANSFER_PACKETS) + { + /* Limit the number of packet and data transferred to what the + hardware can handle */ + packets_to_transfer = MAX_TRANSFER_PACKETS; + bytes_to_transfer = packets_to_transfer * pipe->max_packet; + } + + usbc_hctsiz.s.xfersize = bytes_to_transfer; + usbc_hctsiz.s.pktcnt = packets_to_transfer; + + /* Update the DATA0/DATA1 toggle */ + usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); + /* High speed pipes may need a hardware ping before they start */ + if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING) + usbc_hctsiz.s.dopng = 1; + + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32); + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32); + } + + /* Setup the Host Channel Characteristics Register */ + { + cvmx_usbcx_hccharx_t usbc_hcchar = {.u32 = 0}; + + /* Set the startframe odd/even properly. This is only used for periodic */ + usbc_hcchar.s.oddfrm = usb->frame_number&1; + + /* Set the number of back to back packets allowed by this endpoint. + Split transactions interpret "ec" as the number of immediate + retries of failure. These retries happen too quickly, so we + disable these entirely for splits */ + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + usbc_hcchar.s.ec = 1; + else if (pipe->multi_count < 1) + usbc_hcchar.s.ec = 1; + else if (pipe->multi_count > 3) + usbc_hcchar.s.ec = 3; + else + usbc_hcchar.s.ec = pipe->multi_count; + + /* Set the rest of the endpoint specific settings */ + usbc_hcchar.s.devaddr = pipe->device_addr; + usbc_hcchar.s.eptype = transaction->type; + usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW); + usbc_hcchar.s.epdir = pipe->transfer_dir; + usbc_hcchar.s.epnum = pipe->endpoint_num; + usbc_hcchar.s.mps = pipe->max_packet; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); + } + + /* Do transaction type specific fixups as needed */ + switch (transaction->type) + { + case CVMX_USB_TRANSFER_CONTROL: + __cvmx_usb_start_channel_control(usb, channel, pipe); + break; + case CVMX_USB_TRANSFER_BULK: + case CVMX_USB_TRANSFER_INTERRUPT: + break; + case CVMX_USB_TRANSFER_ISOCHRONOUS: + if (!__cvmx_usb_pipe_needs_split(usb, pipe)) + { + /* ISO transactions require different PIDs depending on direction + and how many packets are needed */ + if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) + { + if (pipe->multi_count < 2) /* Need DATA0 */ + USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), cvmx_usbcx_hctsizx_t, pid, 0); + else /* Need MDATA */ + USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), cvmx_usbcx_hctsizx_t, pid, 3); + } + } + break; + } + { + cvmx_usbcx_hctsizx_t usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))}; + transaction->xfersize = usbc_hctsiz.s.xfersize; + transaction->pktcnt = usbc_hctsiz.s.pktcnt; + } + /* Remeber when we start a split transaction */ + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + usb->active_split = transaction; + USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, chena, 1); + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + __cvmx_usb_fill_tx_fifo(usb, channel); + CVMX_USB_RETURN_NOTHING(); +} + + +/** + * @INTERNAL + * Find a pipe that is ready to be scheduled to hardware. + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param list Pipe list to search + * @param current_frame + * Frame counter to use as a time reference. + * + * @return Pipe or NULL if none are ready + */ +static cvmx_usb_pipe_t *__cvmx_usb_find_ready_pipe(cvmx_usb_internal_state_t *usb, cvmx_usb_pipe_list_t *list, uint64_t current_frame) +{ + cvmx_usb_pipe_t *pipe = list->head; + while (pipe) + { + if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head && + (pipe->next_tx_frame <= current_frame) && + ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) && + (!usb->active_split || (usb->active_split == pipe->head))) + { + CVMX_PREFETCH(pipe, 128); + CVMX_PREFETCH(pipe->head, 0); + return pipe; + } + pipe = pipe->next; + } + return NULL; +} + + +/** + * @INTERNAL + * Called whenever a pipe might need to be scheduled to the + * hardware. + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param is_sof True if this schedule was called on a SOF interrupt. + */ +static void __cvmx_usb_schedule(cvmx_usb_internal_state_t *usb, int is_sof) +{ + int channel; + cvmx_usb_pipe_t *pipe; + int need_sof; + cvmx_usb_transfer_t ttype; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + { + /* Without DMA we need to be careful to not schedule something at the end of a frame and cause an overrun */ + cvmx_usbcx_hfnum_t hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))}; + cvmx_usbcx_hfir_t hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))}; + if (hfnum.s.frrem < hfir.s.frint/4) + goto done; + } + + while (usb->idle_hardware_channels) + { + /* Find an idle channel */ + CVMX_CLZ(channel, usb->idle_hardware_channels); + channel = 31 - channel; + if (cvmx_unlikely(channel > 7)) + { + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO)) + cvmx_dprintf("%s: Idle hardware channels has a channel higher than 7. This is wrong\n", __FUNCTION__); + break; + } + + /* Find a pipe needing service */ + pipe = NULL; + if (is_sof) + { + /* Only process periodic pipes on SOF interrupts. This way we are + sure that the periodic data is sent in the beginning of the + frame */ + pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number); + if (cvmx_likely(!pipe)) + pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number); + } + if (cvmx_likely(!pipe)) + { + pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number); + if (cvmx_likely(!pipe)) + pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number); + } + if (!pipe) + break; + + CVMX_USB_LOG_PARAM("%d", channel); + CVMX_USB_LOG_PARAM("%p", pipe); + + if (cvmx_unlikely((usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS) || + (pipe->flags & CVMX_USB_PIPE_FLAGS_DEBUG_TRANSFERS))) + { + cvmx_usb_transaction_t *transaction = pipe->head; + const cvmx_usb_control_header_t *header = (transaction->control_header) ? cvmx_phys_to_ptr(transaction->control_header) : NULL; + const char *dir = (pipe->transfer_dir == CVMX_USB_DIRECTION_IN) ? "IN" : "OUT"; + const char *type; + switch (pipe->transfer_type) + { + case CVMX_USB_TRANSFER_CONTROL: + type = "SETUP"; + dir = (header->s.request_type & 0x80) ? "IN" : "OUT"; + break; + case CVMX_USB_TRANSFER_ISOCHRONOUS: + type = "ISOCHRONOUS"; + break; + case CVMX_USB_TRANSFER_BULK: + type = "BULK"; + break; + default: /* CVMX_USB_TRANSFER_INTERRUPT */ + type = "INTERRUPT"; + break; + } + cvmx_dprintf("%s: Starting pipe %d, transaction %d on channel %d. %s %s len=%d header=0x%llx\n", + __FUNCTION__, __cvmx_usb_get_pipe_handle(usb, pipe), + __cvmx_usb_get_submit_handle(usb, transaction), + channel, type, dir, + transaction->buffer_length, + (header) ? (unsigned long long)header->u64 : 0ull); + } + __cvmx_usb_start_channel(usb, channel, pipe); + } + +done: + /* Only enable SOF interrupts when we have transactions pending in the + future that might need to be scheduled */ + need_sof = 0; + for (ttype=CVMX_USB_TRANSFER_CONTROL; ttype<=CVMX_USB_TRANSFER_INTERRUPT; ttype++) + { + pipe = usb->active_pipes[ttype].head; + while (pipe) + { + if (pipe->next_tx_frame > usb->frame_number) + { + need_sof = 1; + break; + } + pipe=pipe->next; + } + } + USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, sofmsk, need_sof); + CVMX_USB_RETURN_NOTHING(); +} + + +/** + * @INTERNAL + * Call a user's callback for a specific reason. + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param pipe Pipe the callback is for or NULL + * @param transaction + * Transaction the callback is for or NULL + * @param reason Reason this callback is being called + * @param complete_code + * Completion code for the transaction, if any + */ +static void __cvmx_usb_perform_callback(cvmx_usb_internal_state_t *usb, + cvmx_usb_pipe_t *pipe, + cvmx_usb_transaction_t *transaction, + cvmx_usb_callback_t reason, + cvmx_usb_complete_t complete_code) +{ + cvmx_usb_callback_func_t callback = usb->callback[reason]; + void *user_data = usb->callback_data[reason]; + int submit_handle = -1; + int pipe_handle = -1; + int bytes_transferred = 0; + + if (pipe) + pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe); + + if (transaction) + { + submit_handle = __cvmx_usb_get_submit_handle(usb, transaction); + bytes_transferred = transaction->actual_bytes; + /* Transactions are allowed to override the default callback */ + if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) + { + callback = transaction->callback; + user_data = transaction->callback_data; + } + } + + if (!callback) + return; + + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLBACKS)) + cvmx_dprintf("%*s%s: calling callback %p(usb=%p, complete_code=%s, " + "pipe_handle=%d, submit_handle=%d, bytes_transferred=%d, user_data=%p);\n", + 2*usb->indent, "", __FUNCTION__, callback, usb, + __cvmx_usb_complete_to_string(complete_code), + pipe_handle, submit_handle, bytes_transferred, user_data); + + callback((cvmx_usb_state_t *)usb, reason, complete_code, pipe_handle, submit_handle, + bytes_transferred, user_data); + + if (cvmx_unlikely(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLBACKS)) + cvmx_dprintf("%*s%s: callback %p complete\n", 2*usb->indent, "", + __FUNCTION__, callback); +} + + +/** + * @INTERNAL + * Signal the completion of a transaction and free it. The + * transaction will be removed from the pipe transaction list. + * + * @param usb USB device state populated by + * cvmx_usb_initialize(). + * @param pipe Pipe the transaction is on + * @param transaction + * Transaction that completed + * @param complete_code + * Completion code + */ +static void __cvmx_usb_perform_complete(cvmx_usb_internal_state_t * usb, + cvmx_usb_pipe_t *pipe, + cvmx_usb_transaction_t *transaction, + cvmx_usb_complete_t complete_code) +{ + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + CVMX_USB_LOG_PARAM("%p", pipe); + CVMX_USB_LOG_PARAM("%p", transaction); + CVMX_USB_LOG_PARAM("%d", complete_code); + + /* If this was a split then clear our split in progress marker */ + if (usb->active_split == transaction) + usb->active_split = NULL; + + /* Isochronous transactions need extra processing as they might not be done + after a single data transfer */ + if (cvmx_unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) + { + /* Update the number of bytes transferred in this ISO packet */ + transaction->iso_packets[0].length = transaction->actual_bytes; + transaction->iso_packets[0].status = complete_code; + + /* If there are more ISOs pending and we succeeded, schedule the next + one */ + if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) + { + transaction->actual_bytes = 0; /* No bytes transferred for this packet as of yet */ + transaction->iso_number_packets--; /* One less ISO waiting to transfer */ + transaction->iso_packets++; /* Increment to the next location in our packet array */ + transaction->stage = CVMX_USB_STAGE_NON_CONTROL; + goto done; + } + } + + /* Remove the transaction from the pipe list */ + if (transaction->next) + transaction->next->prev = transaction->prev; + else + pipe->tail = transaction->prev; + if (transaction->prev) + transaction->prev->next = transaction->next; + else + pipe->head = transaction->next; + if (!pipe->head) + { + __cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe); + __cvmx_usb_append_pipe(&usb->idle_pipes, pipe); + + } + __cvmx_usb_perform_callback(usb, pipe, transaction, + CVMX_USB_CALLBACK_TRANSFER_COMPLETE, + complete_code); + __cvmx_usb_free_transaction(usb, transaction); +done: + CVMX_USB_RETURN_NOTHING(); +} + + +/** + * @INTERNAL + * Submit a usb transaction to a pipe. Called for all types + * of transactions. + * + * @param usb + * @param pipe_handle + * Which pipe to submit to. Will be validated in this function. + * @param type Transaction type + * @param flags Flags for the transaction + * @param buffer User buffer for the transaction + * @param buffer_length + * User buffer's length in bytes + * @param control_header + * For control transactions, the 8 byte standard header + * @param iso_start_frame + * For ISO transactions, the start frame + * @param iso_number_packets + * For ISO, the number of packet in the transaction. + * @param iso_packets + * A description of each ISO packet + * @param callback User callback to call when the transaction completes + * @param user_data User's data for the callback + * + * @return Submit handle or negative on failure. Matches the result + * in the external API. + */ +static int __cvmx_usb_submit_transaction(cvmx_usb_internal_state_t *usb, + int pipe_handle, + cvmx_usb_transfer_t type, + int flags, + uint64_t buffer, + int buffer_length, + uint64_t control_header, + int iso_start_frame, + int iso_number_packets, + cvmx_usb_iso_packet_t *iso_packets, + cvmx_usb_callback_func_t callback, + void *user_data) +{ + int submit_handle; + cvmx_usb_transaction_t *transaction; + cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle; + + CVMX_USB_LOG_CALLED(); + if (cvmx_unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + /* Fail if the pipe isn't open */ + if (cvmx_unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(pipe->transfer_type != type)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + transaction = __cvmx_usb_alloc_transaction(usb); + if (cvmx_unlikely(!transaction)) + CVMX_USB_RETURN(CVMX_USB_NO_MEMORY); + + transaction->type = type; + transaction->flags |= flags; + transaction->buffer = buffer; + transaction->buffer_length = buffer_length; + transaction->control_header = control_header; + transaction->iso_start_frame = iso_start_frame; // FIXME: This is not used, implement it + transaction->iso_number_packets = iso_number_packets; + transaction->iso_packets = iso_packets; + transaction->callback = callback; + transaction->callback_data = user_data; + if (transaction->type == CVMX_USB_TRANSFER_CONTROL) + transaction->stage = CVMX_USB_STAGE_SETUP; + else + transaction->stage = CVMX_USB_STAGE_NON_CONTROL; + + transaction->next = NULL; + if (pipe->tail) + { + transaction->prev = pipe->tail; + transaction->prev->next = transaction; + } + else + { + if (pipe->next_tx_frame < usb->frame_number) + pipe->next_tx_frame = usb->frame_number + pipe->interval - + (usb->frame_number - pipe->next_tx_frame) % pipe->interval; + transaction->prev = NULL; + pipe->head = transaction; + __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe); + __cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe); + } + pipe->tail = transaction; + + submit_handle = __cvmx_usb_get_submit_handle(usb, transaction); + + /* We may need to schedule the pipe if this was the head of the pipe */ + if (!transaction->prev) + __cvmx_usb_schedule(usb, 0); + + CVMX_USB_RETURN(submit_handle); +} + + +/** + * Call to submit a USB Bulk transfer to a pipe. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Handle to the pipe for the transfer. + * @param buffer Physical address of the data buffer in + * memory. Note that this is NOT A POINTER, but + * the full 64bit physical address of the + * buffer. This may be zero if buffer_length is + * zero. + * @param buffer_length + * Length of buffer in bytes. + * @param callback Function to call when this transaction + * completes. If the return value of this + * function isn't an error, then this function + * is guaranteed to be called when the + * transaction completes. If this parameter is + * NULL, then the generic callback registered + * through cvmx_usb_register_callback is + * called. If both are NULL, then there is no + * way to know when a transaction completes. + * @param user_data User supplied data returned when the + * callback is called. This is only used if + * callback in not NULL. + * + * @return A submitted transaction handle or negative on + * failure. Negative values are failure codes from + * cvmx_usb_status_t. + */ +int cvmx_usb_submit_bulk(cvmx_usb_state_t *state, int pipe_handle, + uint64_t buffer, int buffer_length, + cvmx_usb_callback_func_t callback, + void *user_data) +{ + int submit_handle; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + CVMX_USB_LOG_PARAM("0x%llx", (unsigned long long)buffer); + CVMX_USB_LOG_PARAM("%d", buffer_length); + + /* Pipe handle checking is done later in a common place */ + if (cvmx_unlikely(!buffer)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(buffer_length < 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle, + CVMX_USB_TRANSFER_BULK, + 0, /* flags */ + buffer, + buffer_length, + 0, /* control_header */ + 0, /* iso_start_frame */ + 0, /* iso_number_packets */ + NULL, /* iso_packets */ + callback, + user_data); + CVMX_USB_RETURN(submit_handle); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_submit_bulk); +#endif + + +/** + * Call to submit a USB Interrupt transfer to a pipe. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Handle to the pipe for the transfer. + * @param buffer Physical address of the data buffer in + * memory. Note that this is NOT A POINTER, but + * the full 64bit physical address of the + * buffer. This may be zero if buffer_length is + * zero. + * @param buffer_length + * Length of buffer in bytes. + * @param callback Function to call when this transaction + * completes. If the return value of this + * function isn't an error, then this function + * is guaranteed to be called when the + * transaction completes. If this parameter is + * NULL, then the generic callback registered + * through cvmx_usb_register_callback is + * called. If both are NULL, then there is no + * way to know when a transaction completes. + * @param user_data User supplied data returned when the + * callback is called. This is only used if + * callback in not NULL. + * + * @return A submitted transaction handle or negative on + * failure. Negative values are failure codes from + * cvmx_usb_status_t. + */ +int cvmx_usb_submit_interrupt(cvmx_usb_state_t *state, int pipe_handle, + uint64_t buffer, int buffer_length, + cvmx_usb_callback_func_t callback, + void *user_data) +{ + int submit_handle; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + CVMX_USB_LOG_PARAM("0x%llx", (unsigned long long)buffer); + CVMX_USB_LOG_PARAM("%d", buffer_length); + + /* Pipe handle checking is done later in a common place */ + if (cvmx_unlikely(!buffer)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(buffer_length < 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle, + CVMX_USB_TRANSFER_INTERRUPT, + 0, /* flags */ + buffer, + buffer_length, + 0, /* control_header */ + 0, /* iso_start_frame */ + 0, /* iso_number_packets */ + NULL, /* iso_packets */ + callback, + user_data); + CVMX_USB_RETURN(submit_handle); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_submit_interrupt); +#endif + + +/** + * Call to submit a USB Control transfer to a pipe. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Handle to the pipe for the transfer. + * @param control_header + * USB 8 byte control header physical address. + * Note that this is NOT A POINTER, but the + * full 64bit physical address of the buffer. + * @param buffer Physical address of the data buffer in + * memory. Note that this is NOT A POINTER, but + * the full 64bit physical address of the + * buffer. This may be zero if buffer_length is + * zero. + * @param buffer_length + * Length of buffer in bytes. + * @param callback Function to call when this transaction + * completes. If the return value of this + * function isn't an error, then this function + * is guaranteed to be called when the + * transaction completes. If this parameter is + * NULL, then the generic callback registered + * through cvmx_usb_register_callback is + * called. If both are NULL, then there is no + * way to know when a transaction completes. + * @param user_data User supplied data returned when the + * callback is called. This is only used if + * callback in not NULL. + * + * @return A submitted transaction handle or negative on + * failure. Negative values are failure codes from + * cvmx_usb_status_t. + */ +int cvmx_usb_submit_control(cvmx_usb_state_t *state, int pipe_handle, + uint64_t control_header, + uint64_t buffer, int buffer_length, + cvmx_usb_callback_func_t callback, + void *user_data) +{ + int submit_handle; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(control_header); + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + CVMX_USB_LOG_PARAM("0x%llx", (unsigned long long)control_header); + CVMX_USB_LOG_PARAM("0x%llx", (unsigned long long)buffer); + CVMX_USB_LOG_PARAM("%d", buffer_length); + + /* Pipe handle checking is done later in a common place */ + if (cvmx_unlikely(!control_header)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + /* Some drivers send a buffer with a zero length. God only knows why */ + if (cvmx_unlikely(buffer && (buffer_length < 0))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(!buffer && (buffer_length != 0))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if ((header->s.request_type & 0x80) == 0) + buffer_length = cvmx_le16_to_cpu(header->s.length); + + submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle, + CVMX_USB_TRANSFER_CONTROL, + 0, /* flags */ + buffer, + buffer_length, + control_header, + 0, /* iso_start_frame */ + 0, /* iso_number_packets */ + NULL, /* iso_packets */ + callback, + user_data); + CVMX_USB_RETURN(submit_handle); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_submit_control); +#endif + + +/** + * Call to submit a USB Isochronous transfer to a pipe. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Handle to the pipe for the transfer. + * @param start_frame + * Number of frames into the future to schedule + * this transaction. + * @param flags Flags to control the transfer. See + * cvmx_usb_isochronous_flags_t for the flag + * definitions. + * @param number_packets + * Number of sequential packets to transfer. + * "packets" is a pointer to an array of this + * many packet structures. + * @param packets Description of each transfer packet as + * defined by cvmx_usb_iso_packet_t. The array + * pointed to here must stay valid until the + * complete callback is called. + * @param buffer Physical address of the data buffer in + * memory. Note that this is NOT A POINTER, but + * the full 64bit physical address of the + * buffer. This may be zero if buffer_length is + * zero. + * @param buffer_length + * Length of buffer in bytes. + * @param callback Function to call when this transaction + * completes. If the return value of this + * function isn't an error, then this function + * is guaranteed to be called when the + * transaction completes. If this parameter is + * NULL, then the generic callback registered + * through cvmx_usb_register_callback is + * called. If both are NULL, then there is no + * way to know when a transaction completes. + * @param user_data User supplied data returned when the + * callback is called. This is only used if + * callback in not NULL. + * + * @return A submitted transaction handle or negative on + * failure. Negative values are failure codes from + * cvmx_usb_status_t. + */ +int cvmx_usb_submit_isochronous(cvmx_usb_state_t *state, int pipe_handle, + int start_frame, int flags, + int number_packets, + cvmx_usb_iso_packet_t packets[], + uint64_t buffer, int buffer_length, + cvmx_usb_callback_func_t callback, + void *user_data) +{ + int submit_handle; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + CVMX_USB_LOG_PARAM("%d", start_frame); + CVMX_USB_LOG_PARAM("0x%x", flags); + CVMX_USB_LOG_PARAM("%d", number_packets); + CVMX_USB_LOG_PARAM("%p", packets); + CVMX_USB_LOG_PARAM("0x%llx", (unsigned long long)buffer); + CVMX_USB_LOG_PARAM("%d", buffer_length); + + /* Pipe handle checking is done later in a common place */ + if (cvmx_unlikely(start_frame < 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(flags & ~(CVMX_USB_ISOCHRONOUS_FLAGS_ALLOW_SHORT | CVMX_USB_ISOCHRONOUS_FLAGS_ASAP))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(number_packets < 1)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(!packets)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(!buffer)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(buffer_length < 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle, + CVMX_USB_TRANSFER_ISOCHRONOUS, + flags, + buffer, + buffer_length, + 0, /* control_header */ + start_frame, + number_packets, + packets, + callback, + user_data); + CVMX_USB_RETURN(submit_handle); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_submit_isochronous); +#endif + + +/** + * Cancel one outstanding request in a pipe. Canceling a request + * can fail if the transaction has already completed before cancel + * is called. Even after a successful cancel call, it may take + * a frame or two for the cvmx_usb_poll() function to call the + * associated callback. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Pipe handle to cancel requests in. + * @param submit_handle + * Handle to transaction to cancel, returned by the submit function. + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_cancel(cvmx_usb_state_t *state, int pipe_handle, + int submit_handle) +{ + cvmx_usb_transaction_t *transaction; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + CVMX_USB_LOG_PARAM("%d", submit_handle); + + if (cvmx_unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* Fail if the pipe isn't open */ + if (cvmx_unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + transaction = usb->transaction + submit_handle; + + /* Fail if this transaction already completed */ + if (cvmx_unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* If the transaction is the HEAD of the queue and scheduled. We need to + treat it special */ + if ((pipe->head == transaction) && + (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) + { + cvmx_usbcx_hccharx_t usbc_hcchar; + + usb->pipe_for_channel[pipe->channel] = NULL; + pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; + + CVMX_SYNCW; + + usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index)); + /* If the channel isn't enabled then the transaction already completed */ + if (usbc_hcchar.s.chena) + { + usbc_hcchar.s.chdis = 1; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32); + } + } + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL); + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_cancel); +#endif + + +/** + * Cancel all outstanding requests in a pipe. Logically all this + * does is call cvmx_usb_cancel() in a loop. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Pipe handle to cancel requests in. + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_cancel_all(cvmx_usb_state_t *state, int pipe_handle) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + if (cvmx_unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* Fail if the pipe isn't open */ + if (cvmx_unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* Simply loop through and attempt to cancel each transaction */ + while (pipe->head) + { + cvmx_usb_status_t result = cvmx_usb_cancel(state, pipe_handle, + __cvmx_usb_get_submit_handle(usb, pipe->head)); + if (cvmx_unlikely(result != CVMX_USB_SUCCESS)) + CVMX_USB_RETURN(result); + } + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_cancel_all); +#endif + + +/** + * Close a pipe created with cvmx_usb_open_pipe(). + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param pipe_handle + * Pipe handle to close. + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. CVMX_USB_BUSY is returned if the + * pipe has outstanding transfers. + */ +cvmx_usb_status_t cvmx_usb_close_pipe(cvmx_usb_state_t *state, int pipe_handle) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", pipe_handle); + if (cvmx_unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES))) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* Fail if the pipe isn't open */ + if (cvmx_unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + /* Fail if the pipe has pending transactions */ + if (cvmx_unlikely(pipe->head)) + CVMX_USB_RETURN(CVMX_USB_BUSY); + + pipe->flags = 0; + __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe); + __cvmx_usb_append_pipe(&usb->free_pipes, pipe); + + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_close_pipe); +#endif + + +/** + * Register a function to be called when various USB events occur. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * @param reason Which event to register for. + * @param callback Function to call when the event occurs. + * @param user_data User data parameter to the function. + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_register_callback(cvmx_usb_state_t *state, + cvmx_usb_callback_t reason, + cvmx_usb_callback_func_t callback, + void *user_data) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + CVMX_USB_LOG_PARAM("%d", reason); + CVMX_USB_LOG_PARAM("%p", callback); + CVMX_USB_LOG_PARAM("%p", user_data); + if (cvmx_unlikely(reason >= __CVMX_USB_CALLBACK_END)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + if (cvmx_unlikely(!callback)) + CVMX_USB_RETURN(CVMX_USB_INVALID_PARAM); + + usb->callback[reason] = callback; + usb->callback_data[reason] = user_data; + + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_register_callback); +#endif + + +/** + * Get the current USB protocol level frame number. The frame + * number is always in the range of 0-0x7ff. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * + * @return USB frame number + */ +int cvmx_usb_get_frame_number(cvmx_usb_state_t *state) +{ + int frame_number; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usbcx_hfnum_t usbc_hfnum; + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + + usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); + frame_number = usbc_hfnum.s.frnum; + + CVMX_USB_RETURN(frame_number); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_get_frame_number); +#endif + + +/** + * @INTERNAL + * Poll a channel for status + * + * @param usb USB device + * @param channel Channel to poll + * + * @return Zero on success + */ +static int __cvmx_usb_poll_channel(cvmx_usb_internal_state_t *usb, int channel) +{ + cvmx_usbcx_hcintx_t usbc_hcint; + cvmx_usbcx_hctsizx_t usbc_hctsiz; + cvmx_usbcx_hccharx_t usbc_hcchar; + cvmx_usb_pipe_t *pipe; + cvmx_usb_transaction_t *transaction; + int bytes_this_transfer; + int bytes_in_last_packet; + int packets_processed; + int buffer_space_left; + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", usb); + CVMX_USB_LOG_PARAM("%d", channel); + + /* Read the interrupt status bits for the channel */ + usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index)); + +#if 0 + cvmx_dprintf("Channel %d%s%s%s%s%s%s%s%s%s%s%s\n", channel, + (usbc_hcint.s.datatglerr) ? " DATATGLERR" : "", + (usbc_hcint.s.frmovrun) ? " FRMOVRUN" : "", + (usbc_hcint.s.bblerr) ? " BBLERR" : "", + (usbc_hcint.s.xacterr) ? " XACTERR" : "", + (usbc_hcint.s.nyet) ? " NYET" : "", + (usbc_hcint.s.ack) ? " ACK" : "", + (usbc_hcint.s.nak) ? " NAK" : "", + (usbc_hcint.s.stall) ? " STALL" : "", + (usbc_hcint.s.ahberr) ? " AHBERR" : "", + (usbc_hcint.s.chhltd) ? " CHHLTD" : "", + (usbc_hcint.s.xfercompl) ? " XFERCOMPL" : ""); +#endif + + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + { + usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); + + if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) + { + /* There seems to be a bug in CN31XX which can cause interrupt + IN transfers to get stuck until we do a write of HCCHARX + without changing things */ + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); + CVMX_USB_RETURN(0); + } + + /* In non DMA mode the channels don't halt themselves. We need to + manually disable channels that are left running */ + if (!usbc_hcint.s.chhltd) + { + if (usbc_hcchar.s.chena) + { + cvmx_usbcx_hcintmskx_t hcintmsk; + /* Disable all interrupts except CHHLTD */ + hcintmsk.u32 = 0; + hcintmsk.s.chhltdmsk = 1; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32); + usbc_hcchar.s.chdis = 1; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32); + CVMX_USB_RETURN(0); + } + else if (usbc_hcint.s.xfercompl) + { + /* Successful IN/OUT with transfer complete. Channel halt isn't needed */ + } + else + { + cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel); + CVMX_USB_RETURN(0); + } + } + } + else + { + /* There is are no interrupts that we need to process when the channel is + still running */ + if (!usbc_hcint.s.chhltd) + CVMX_USB_RETURN(0); + } + + /* Disable the channel interrupts now that it is done */ + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); + usb->idle_hardware_channels |= (1<<channel); + + /* Make sure this channel is tied to a valid pipe */ + pipe = usb->pipe_for_channel[channel]; + CVMX_PREFETCH(pipe, 0); + CVMX_PREFETCH(pipe, 128); + if (!pipe) + CVMX_USB_RETURN(0); + transaction = pipe->head; + CVMX_PREFETCH0(transaction); + + /* Disconnect this pipe from the HW channel. Later the schedule function will + figure out which pipe needs to go */ + usb->pipe_for_channel[channel] = NULL; + pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; + + /* Read the channel config info so we can figure out how much data + transfered */ + usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index)); + usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index)); + + /* Calculating the number of bytes successfully transferred is dependent on + the transfer direction */ + packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt; + if (usbc_hcchar.s.epdir) + { + /* IN transactions are easy. For every byte received the hardware + decrements xfersize. All we need to do is subtract the current + value of xfersize from its starting value and we know how many + bytes were written to the buffer */ + bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize; + } + else + { + /* OUT transaction don't decrement xfersize. Instead pktcnt is + decremented on every successful packet send. The hardware does + this when it receives an ACK, or NYET. If it doesn't + receive one of these responses pktcnt doesn't change */ + bytes_this_transfer = packets_processed * usbc_hcchar.s.mps; + /* The last packet may not be a full transfer if we didn't have + enough data */ + if (bytes_this_transfer > transaction->xfersize) + bytes_this_transfer = transaction->xfersize; + } + /* Figure out how many bytes were in the last packet of the transfer */ + if (packets_processed) + bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps; + else + bytes_in_last_packet = bytes_this_transfer; + + /* As a special case, setup transactions output the setup header, not + the user's data. For this reason we don't count setup data as bytes + transferred */ + if ((transaction->stage == CVMX_USB_STAGE_SETUP) || + (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE)) + bytes_this_transfer = 0; + + /* Optional debug output */ + if (cvmx_unlikely((usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS) || + (pipe->flags & CVMX_USB_PIPE_FLAGS_DEBUG_TRANSFERS))) + cvmx_dprintf("%s: Channel %d halted. Pipe %d transaction %d stage %d bytes=%d\n", + __FUNCTION__, channel, + __cvmx_usb_get_pipe_handle(usb, pipe), + __cvmx_usb_get_submit_handle(usb, transaction), + transaction->stage, bytes_this_transfer); + + /* Add the bytes transferred to the running total. It is important that + bytes_this_transfer doesn't count any data that needs to be + retransmitted */ + transaction->actual_bytes += bytes_this_transfer; + if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) + buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes; + else + buffer_space_left = transaction->buffer_length - transaction->actual_bytes; + + /* We need to remember the PID toggle state for the next transaction. The + hardware already updated it for the next transaction */ + pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0); + + /* For high speed bulk out, assume the next transaction will need to do a + ping before proceeding. If this isn't true the ACK processing below + will clear this flag */ + if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && + (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && + (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)) + pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; + + if (usbc_hcint.s.stall) + { + /* STALL as a response means this transaction cannot be completed + because the device can't process transactions. Tell the user. Any + data that was transferred will be counted on the actual bytes + transferred */ + pipe->pid_toggle = 0; + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL); + } + else if (usbc_hcint.s.xacterr) + { + /* We know at least one packet worked if we get a ACK or NAK. Reset the retry counter */ + if (usbc_hcint.s.nak || usbc_hcint.s.ack) + transaction->retries = 0; + transaction->retries++; + if (transaction->retries > MAX_RETRIES) + { + /* XactErr as a response means the device signaled something wrong with + the transfer. For example, PID toggle errors cause these */ + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR); + } + else + { + /* If this was a split then clear our split in progress marker */ + if (usb->active_split == transaction) + usb->active_split = NULL; + /* Rewind to the beginning of the transaction by anding off the + split complete bit */ + transaction->stage &= ~1; + pipe->split_sc_frame = -1; + pipe->next_tx_frame += pipe->interval; + if (pipe->next_tx_frame < usb->frame_number) + pipe->next_tx_frame = usb->frame_number + pipe->interval - + (usb->frame_number - pipe->next_tx_frame) % pipe->interval; + } + } + else if (usbc_hcint.s.bblerr) + { + /* Babble Error (BblErr) */ + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR); + } + else if (usbc_hcint.s.datatglerr) + { + /* We'll retry the exact same transaction again */ + transaction->retries++; + } + else if (usbc_hcint.s.nyet) + { + /* NYET as a response is only allowed in three cases: as a response to + a ping, as a response to a split transaction, and as a response to + a bulk out. The ping case is handled by hardware, so we only have + splits and bulk out */ + if (!__cvmx_usb_pipe_needs_split(usb, pipe)) + { + transaction->retries = 0; + /* If there is more data to go then we need to try again. Otherwise + this transaction is complete */ + if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + } + else + { + /* Split transactions retry the split complete 4 times then rewind + to the start split and do the entire transactions again */ + transaction->retries++; + if ((transaction->retries & 0x3) == 0) + { + /* Rewind to the beginning of the transaction by anding off the + split complete bit */ + transaction->stage &= ~1; + pipe->split_sc_frame = -1; + } + } + } + else if (usbc_hcint.s.ack) + { + transaction->retries = 0; + /* The ACK bit can only be checked after the other error bits. This is + because a multi packet transfer may succeed in a number of packets + and then get a different response on the last packet. In this case + both ACK and the last response bit will be set. If none of the + other response bits is set, then the last packet must have been an + ACK */ + + /* Since we got an ACK, we know we don't need to do a ping on this + pipe */ + pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING; + + switch (transaction->type) + { + case CVMX_USB_TRANSFER_CONTROL: + switch (transaction->stage) + { + case CVMX_USB_STAGE_NON_CONTROL: + case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: + /* This should be impossible */ + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR); + break; + case CVMX_USB_STAGE_SETUP: + pipe->pid_toggle = 1; + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE; + else + { + cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header); + if (header->s.length) + transaction->stage = CVMX_USB_STAGE_DATA; + else + transaction->stage = CVMX_USB_STAGE_STATUS; + } + break; + case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: + { + cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header); + if (header->s.length) + transaction->stage = CVMX_USB_STAGE_DATA; + else + transaction->stage = CVMX_USB_STAGE_STATUS; + } + break; + case CVMX_USB_STAGE_DATA: + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE; + /* For setup OUT data that are splits, the hardware + doesn't appear to count transferred data. Here + we manually update the data transferred */ + if (!usbc_hcchar.s.epdir) + { + if (buffer_space_left < pipe->max_packet) + transaction->actual_bytes += buffer_space_left; + else + transaction->actual_bytes += pipe->max_packet; + } + } + else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) + { + pipe->pid_toggle = 1; + transaction->stage = CVMX_USB_STAGE_STATUS; + } + break; + case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: + if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) + { + pipe->pid_toggle = 1; + transaction->stage = CVMX_USB_STAGE_STATUS; + } + else + { + transaction->stage = CVMX_USB_STAGE_DATA; + } + break; + case CVMX_USB_STAGE_STATUS: + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE; + else + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + break; + case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + break; + } + break; + case CVMX_USB_TRANSFER_BULK: + case CVMX_USB_TRANSFER_INTERRUPT: + /* The only time a bulk transfer isn't complete when + it finishes with an ACK is during a split transaction. For + splits we need to continue the transfer if more data is + needed */ + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL) + transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; + else + { + if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet)) + transaction->stage = CVMX_USB_STAGE_NON_CONTROL; + else + { + if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT) + pipe->next_tx_frame += pipe->interval; + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + } + } + } + else + { + if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && + (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && + (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) && + (usbc_hcint.s.nak)) + pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; + if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) + { + if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT) + pipe->next_tx_frame += pipe->interval; + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + } + } + break; + case CVMX_USB_TRANSFER_ISOCHRONOUS: + if (__cvmx_usb_pipe_needs_split(usb, pipe)) + { + /* ISOCHRONOUS OUT splits don't require a complete split stage. + Instead they use a sequence of begin OUT splits to transfer + the data 188 bytes at a time. Once the transfer is complete, + the pipe sleeps until the next schedule interval */ + if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) + { + /* If no space left or this wasn't a max size packet then + this transfer is complete. Otherwise start it again + to send the next 188 bytes */ + if (!buffer_space_left || (bytes_this_transfer < 188)) + { + pipe->next_tx_frame += pipe->interval; + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + } + } + else + { + if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) + { + /* We are in the incoming data phase. Keep getting + data until we run out of space or get a small + packet */ + if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) + { + pipe->next_tx_frame += pipe->interval; + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + } + } + else + transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; + } + } + else + { + pipe->next_tx_frame += pipe->interval; + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS); + } + break; + } + } + else if (usbc_hcint.s.nak) + { + /* If this was a split then clear our split in progress marker */ + if (usb->active_split == transaction) + usb->active_split = NULL; + /* NAK as a response means the device couldn't accept the transaction, + but it should be retried in the future. Rewind to the beginning of + the transaction by anding off the split complete bit. Retry in the + next interval */ + transaction->retries = 0; + transaction->stage &= ~1; + pipe->next_tx_frame += pipe->interval; + if (pipe->next_tx_frame < usb->frame_number) + pipe->next_tx_frame = usb->frame_number + pipe->interval - + (usb->frame_number - pipe->next_tx_frame) % pipe->interval; + } + else + { + cvmx_usb_port_status_t port; + port = cvmx_usb_get_status((cvmx_usb_state_t *)usb); + if (port.port_enabled) + { + /* We'll retry the exact same transaction again */ + transaction->retries++; + } + else + { + /* We get channel halted interrupts with no result bits sets when the + cable is unplugged */ + __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR); + } + } + CVMX_USB_RETURN(0); +} + + +/** + * Poll the USB block for status and call all needed callback + * handlers. This function is meant to be called in the interrupt + * handler for the USB controller. It can also be called + * periodically in a loop for non-interrupt based operation. + * + * @param state USB device state populated by + * cvmx_usb_initialize(). + * + * @return CVMX_USB_SUCCESS or a negative error code defined in + * cvmx_usb_status_t. + */ +cvmx_usb_status_t cvmx_usb_poll(cvmx_usb_state_t *state) +{ + cvmx_usbcx_hfnum_t usbc_hfnum; + cvmx_usbcx_gintsts_t usbc_gintsts; + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + + CVMX_PREFETCH(usb, 0); + CVMX_PREFETCH(usb, 1*128); + CVMX_PREFETCH(usb, 2*128); + CVMX_PREFETCH(usb, 3*128); + CVMX_PREFETCH(usb, 4*128); + + CVMX_USB_LOG_CALLED(); + CVMX_USB_LOG_PARAM("%p", state); + + /* Update the frame counter */ + usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); + if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum) + usb->frame_number += 0x4000; + usb->frame_number &= ~0x3fffull; + usb->frame_number |= usbc_hfnum.s.frnum; + + /* Read the pending interrupts */ + usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index)); + + /* Clear the interrupts now that we know about them */ + __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32); + + if (usbc_gintsts.s.rxflvl) + { + /* RxFIFO Non-Empty (RxFLvl) + Indicates that there is at least one packet pending to be read + from the RxFIFO. */ + /* In DMA mode this is handled by hardware */ + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + __cvmx_usb_poll_rx_fifo(usb); + } + if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) + { + /* Fill the Tx FIFOs when not in DMA mode */ + if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) + __cvmx_usb_poll_tx_fifo(usb); + } + if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) + { + cvmx_usbcx_hprt_t usbc_hprt; + /* Disconnect Detected Interrupt (DisconnInt) + Asserted when a device disconnect is detected. */ + + /* Host Port Interrupt (PrtInt) + The core sets this bit to indicate a change in port status of one + of the O2P USB core ports in Host mode. The application must + read the Host Port Control and Status (HPRT) register to + determine the exact event that caused this interrupt. The + application must clear the appropriate status bit in the Host Port + Control and Status register to clear this bit. */ + + /* Call the user's port callback */ + __cvmx_usb_perform_callback(usb, NULL, NULL, + CVMX_USB_CALLBACK_PORT_CHANGED, + CVMX_USB_COMPLETE_SUCCESS); + /* Clear the port change bits */ + usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); + usbc_hprt.s.prtena = 0; + __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32); + } + if (usbc_gintsts.s.hchint) + { + /* Host Channels Interrupt (HChInt) + The core sets this bit to indicate that an interrupt is pending on + one of the channels of the core (in Host mode). The application + must read the Host All Channels Interrupt (HAINT) register to + determine the exact number of the channel on which the + interrupt occurred, and then read the corresponding Host + Channel-n Interrupt (HCINTn) register to determine the exact + cause of the interrupt. The application must clear the + appropriate status bit in the HCINTn register to clear this bit. */ + cvmx_usbcx_haint_t usbc_haint; + usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index)); + while (usbc_haint.u32) + { + int channel; + CVMX_CLZ(channel, usbc_haint.u32); + channel = 31 - channel; + __cvmx_usb_poll_channel(usb, channel); + usbc_haint.u32 ^= 1<<channel; + } + } + + __cvmx_usb_schedule(usb, usbc_gintsts.s.sof); + + CVMX_USB_RETURN(CVMX_USB_SUCCESS); +} +#ifdef CVMX_BUILD_FOR_LINUX_KERNEL +EXPORT_SYMBOL(cvmx_usb_poll); +#endif + +extern void cvmx_usb_set_toggle(cvmx_usb_state_t *state, int endpoint_num, int toggle) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usb_pipe_t *pipe = usb->pipe + endpoint_num; + + pipe->pid_toggle = !!toggle; +} + +extern int cvmx_usb_get_toggle(cvmx_usb_state_t *state, int endpoint_num) +{ + cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state; + cvmx_usb_pipe_t *pipe = usb->pipe + endpoint_num; + + if (pipe->pid_toggle) + return (1); + return (0); +} + |