src/sys/dev/spibus/spibus.c, branch stable/14 FreeBSD source tree spibus: Use a bus_child_deleted method to free ivars for children 2024-12-01T02:46:07+00:00 John Baldwin jhb@FreeBSD.org 2024-11-01T14:10:19+00:00 35c71ac2b6d5dc0d77755154cf8edddc1d4caab0 Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D47373 (cherry picked from commit 84553ccd0c8b1fa5b3f0b5b70a42a244f26cea75) 
Reviewed by:	imp
Differential Revision:	https://reviews.freebsd.org/D47373

(cherry picked from commit 84553ccd0c8b1fa5b3f0b5b70a42a244f26cea75)
sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16T17:54:36+00:00 Warner Losh imp@FreeBSD.org 2023-08-16T17:54:36+00:00 685dc743dc3b5645e34836464128e1c0558b404b Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/ 
Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
spibus(4): Add support for ACPI-based children enumeration 2023-08-03T16:10:50+00:00 Vladimir Kondratyev wulf@FreeBSD.org 2023-08-03T16:10:50+00:00 7d380b986a1808164846cfd9afb5ae3f99921fcf When spibus is attached as child of Intel SPI controller it scans all ACPI nodes for "SPI Serial Bus Connection Resource Descriptor" described in section 19.6.126 of ACPI specs. If such a descriptor is found, SPI child is added to spibus, it's SPI chip select, mode, clock, IRQ resource and ACPI handle are added to ivars. Existing ACPI bus-hosted child is deleted afterwards. Apple ACPI SPI extensions are supported. Reviewed by: manu Differential Revision: https://reviews.freebsd.org/D41248 
When spibus is attached as child of Intel SPI controller it scans all
ACPI nodes for "SPI Serial Bus Connection Resource Descriptor" described
in section 19.6.126 of ACPI specs.
If such a descriptor is found, SPI child is added to spibus, it's SPI
chip select, mode, clock, IRQ resource and ACPI handle are added to ivars.
Existing ACPI bus-hosted child is deleted afterwards.
Apple ACPI SPI extensions are supported.

Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D41248
spibus(4): Allow IRQ resource to be released 2023-08-03T16:10:50+00:00 Vladimir Kondratyev wulf@FreeBSD.org 2023-08-03T16:10:50+00:00 c6889cbf664ecddf7fdce7c6d3c90a282c1b5d98 IRQ Resource is allocated on spibus(4). We must release it here too rather than propagate request down the tree. Fixes: 4dd8db62e9d3 ("Add IRQ resource to SPIBUS") MFC after: 1 week Reviewed by: manu Differential Revision: https://reviews.freebsd.org/D41243 
IRQ Resource is allocated on spibus(4). We must release it here too
rather than propagate request down the tree.

Fixes:	4dd8db62e9d3 ("Add IRQ resource to SPIBUS")

MFC after:	1 week
Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D41243
spibus(4): Skip bus_generic_detach() on device detach 2023-08-03T16:10:49+00:00 Vladimir Kondratyev wulf@FreeBSD.org 2023-08-03T16:10:49+00:00 1e55a130620e5bef3570c4e1d326412c614fba84 device_delete_children() detaches all children too. MFC after: 1 month Reviewed by: manu Differential Revision: https://reviews.freebsd.org/D41240 
device_delete_children() detaches all children too.

MFC after:	1 month
Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D41240
spibus: extend API: add cs_delay ivar, KEEP_CS and NO_SLEEP flags 2023-04-24T09:41:52+00:00 Val Packett val@packett.cool 2023-04-24T09:41:52+00:00 3c086734381945f6d779a98582d8eae3edca0b68 These feature are required for an upcoming Apple MacBook topcase (HID over SPI) driver: A delay after toggling CS is required to avoid anomalies like an extra junk byte in front of the message. Keeping CS asserted is required to be able to read a status report after writing a command. (The device won't return the status if CS was deasserted.) Sleep is not allowed in the interrupt context where the Apple input driver runs its transactions. Use a flag to tell the SPI driver to avoid mtx_sleep. Reviewed by: manu (ok to SPI part of larger patch) MFC afret: 1 month Differential revision: https://reviews.freebsd.org/D29534 
These feature are required for an upcoming Apple MacBook topcase
(HID over SPI) driver:

A delay after toggling CS is required to avoid anomalies like an extra
junk byte in front of the message. Keeping CS asserted is required to
be able to read a status report after writing a command. (The device
won't return the status if CS was deasserted.)

Sleep is not allowed in the interrupt context where the Apple input
driver runs its transactions. Use a flag to tell the SPI driver to
avoid mtx_sleep.

Reviewed by:	manu (ok to SPI part of larger patch)
MFC afret:	1 month
Differential revision:	https://reviews.freebsd.org/D29534
Remove unused spibus_devclass and ofw_spibus_devclass. 2022-05-09T19:22:00+00:00 John Baldwin jhb@FreeBSD.org 2022-05-09T19:22:00+00:00 5f31d14a92353b6b0acf6960511b3acf3911d163 






newbus: Move from bus_child_{pnpinfo,location}_src to bus_child_{pnpinfo,location} with sbuf
2021-06-23T02:52:06+00:00

Warner Losh
imp@FreeBSD.org

2021-06-23T02:27:57+00:00

ddfc9c4c59e2ea4871100d8c076adffe3af8ff21

Now that the upper layers all go through a layer to tie into these
information functions that translates an sbuf into char * and len. The
current interface suffers issues of what to do in cases of truncation,
etc. Instead, migrate all these functions to using struct sbuf and these
issues go away. The caller is also in charge of any memory allocation
and/or expansion that's needed during this process.

Create a bus_generic_child_{pnpinfo,location} and make it default. It
just returns success. This is for those busses that have no information
for these items. Migrate the now-empty routines to using this as
appropriate.

Document these new interfaces with man pages, and oversight from before.

Reviewed by:		jhb, bcr
Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D29937





Now that the upper layers all go through a layer to tie into these
information functions that translates an sbuf into char * and len. The
current interface suffers issues of what to do in cases of truncation,
etc. Instead, migrate all these functions to using struct sbuf and these
issues go away. The caller is also in charge of any memory allocation
and/or expansion that's needed during this process.

Create a bus_generic_child_{pnpinfo,location} and make it default. It
just returns success. This is for those busses that have no information
for these items. Migrate the now-empty routines to using this as
appropriate.

Document these new interfaces with man pages, and oversight from before.

Reviewed by:		jhb, bcr
Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D29937







Add IRQ resource to SPIBUS
2020-12-17T17:11:14+00:00

Emmanuel Vadot
manu@FreeBSD.org

2020-12-17T17:11:14+00:00

4dd8db62e9d36d9796503fe98ad0d18a4bd0da71

Add capability to SPIBUS to have child device with IRQ.
For example many ADC chip have a dedicated pin to signal "data ready"
and the host can just wait for a interrupt to go out and read the result.

It is the same code as in R282674 and R282702 for IICBUS by Michal Meloun

Submitted by:	Oskar Holmund <oskar.holmlund@ohdata.se>
Differential Revision:	https://reviews.freebsd.org/D27396





Add capability to SPIBUS to have child device with IRQ.
For example many ADC chip have a dedicated pin to signal "data ready"
and the host can just wait for a interrupt to go out and read the result.

It is the same code as in R282674 and R282702 for IICBUS by Michal Meloun

Submitted by:	Oskar Holmund <oskar.holmlund@ohdata.se>
Differential Revision:	https://reviews.freebsd.org/D27396







Regularize my copyright notice
2019-12-04T16:56:11+00:00

Warner Losh
imp@FreeBSD.org

2019-12-04T16:56:11+00:00

f86e60008bdf690b61af2c18e98ee791ca91433f

o Remove All Rights Reserved from my notices
o imp@FreeBSD.org everywhere
o regularize punctiation, eliminate date ranges
o Make sure that it's clear that I don't claim All Rights reserved by listing
  All Rights Reserved on same line as other copyright holders (but not
  me). Other such holders are also listed last where it's clear.





o Remove All Rights Reserved from my notices
o imp@FreeBSD.org everywhere
o regularize punctiation, eliminate date ranges
o Make sure that it's clear that I don't claim All Rights reserved by listing
  All Rights Reserved on same line as other copyright holders (but not
  me). Other such holders are also listed last where it's clear.