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Diffstat (limited to 'sys/contrib/alpine-hal/al_hal_iofic.c')
| -rw-r--r-- | sys/contrib/alpine-hal/al_hal_iofic.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/sys/contrib/alpine-hal/al_hal_iofic.c b/sys/contrib/alpine-hal/al_hal_iofic.c new file mode 100644 index 000000000000..b60a45f3002e --- /dev/null +++ b/sys/contrib/alpine-hal/al_hal_iofic.c @@ -0,0 +1,291 @@ +/*- +******************************************************************************* +Copyright (C) 2015 Annapurna Labs Ltd. + +This file may be licensed under the terms of the Annapurna Labs Commercial +License Agreement. + +Alternatively, this file can be distributed under the terms of the GNU General +Public License V2 as published by the Free Software Foundation and can be +found at http://www.gnu.org/licenses/gpl-2.0.html + +Alternatively, 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. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +*******************************************************************************/ + +/** + * @{ + * @file al_hal_iofic.c + * + * @brief interrupt controller hal + * + */ + +#include "al_hal_iofic.h" +#include "al_hal_iofic_regs.h" + +/* + * configure the interrupt registers, interrupts will are kept masked + */ +int al_iofic_config(void __iomem *regs_base, int group, uint32_t flags) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + al_reg_write32(®s->ctrl[group].int_control_grp, flags); + + return 0; +} + +/* + * configure the moderation timer resolution for a given group + */ +int al_iofic_moder_res_config(void __iomem *regs_base, int group, + uint8_t resolution) + +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + uint32_t reg; + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + reg = al_reg_read32(®s->ctrl[group].int_control_grp); + AL_REG_FIELD_SET(reg, + INT_CONTROL_GRP_MOD_RES_MASK, + INT_CONTROL_GRP_MOD_RES_SHIFT, + resolution); + al_reg_write32(®s->ctrl[group].int_control_grp, reg); + + return 0; +} + +/* + * configure the moderation timer interval for a given legacy interrupt group + */ +int al_iofic_legacy_moder_interval_config(void __iomem *regs_base, int group, + uint8_t interval) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + uint32_t reg; + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + reg = al_reg_read32(®s->ctrl[group].int_control_grp); + AL_REG_FIELD_SET(reg, + INT_CONTROL_GRP_MOD_INTV_MASK, + INT_CONTROL_GRP_MOD_INTV_SHIFT, + interval); + al_reg_write32(®s->ctrl[group].int_control_grp, reg); + + return 0; +} + + +/* + * configure the moderation timer interval for a given msix vector. + */ +int al_iofic_msix_moder_interval_config(void __iomem *regs_base, int group, + uint8_t vector, uint8_t interval) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + uint32_t reg; + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + reg = al_reg_read32(®s->grp_int_mod[group][vector].grp_int_mod_reg); + AL_REG_FIELD_SET(reg, + INT_MOD_INTV_MASK, + INT_MOD_INTV_SHIFT, + interval); + al_reg_write32(®s->grp_int_mod[group][vector].grp_int_mod_reg, reg); + + return 0; +} + +/* + * configure the target-id attributes for a given msix vector. + */ +int al_iofic_msix_tgtid_attributes_config(void __iomem *regs_base, int group, + uint8_t vector, uint32_t tgtid, uint8_t tgtid_en) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + uint32_t reg = 0; + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + AL_REG_FIELD_SET(reg, + INT_MSIX_TGTID_MASK, + INT_MSIX_TGTID_SHIFT, + tgtid); + AL_REG_BIT_VAL_SET(reg, + INT_MSIX_TGTID_EN_SHIFT, + tgtid_en); + + al_reg_write32(®s->grp_int_mod[group][vector].grp_int_tgtid_reg, reg); + + return 0; +} + +/* + * return the offset of the unmask register for a given group + */ +uint32_t __iomem * al_iofic_unmask_offset_get(void __iomem *regs_base, int group) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + return ®s->ctrl[group].int_mask_clear_grp; +} + + +/* + * unmask specific interrupts for a given group + */ +void al_iofic_unmask(void __iomem *regs_base, int group, uint32_t mask) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + /* + * use the mask clear register, no need to read the mask register + * itself. write 0 to unmask, 1 has no effect + */ + al_reg_write32_relaxed(®s->ctrl[group].int_mask_clear_grp, ~mask); +} + +/* + * mask specific interrupts for a given group + */ +void al_iofic_mask(void __iomem *regs_base, int group, uint32_t mask) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + uint32_t reg; + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + reg = al_reg_read32(®s->ctrl[group].int_mask_grp); + + al_reg_write32(®s->ctrl[group].int_mask_grp, reg | mask); +} + +/* + * read the mask for a given group + */ +uint32_t al_iofic_read_mask(void __iomem *regs_base, int group) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + return al_reg_read32(®s->ctrl[group].int_mask_grp); +} + +/* + * read interrupt cause register for a given group + */ +uint32_t al_iofic_read_cause(void __iomem *regs_base, int group) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + return al_reg_read32(®s->ctrl[group].int_cause_grp); +} + +/* + * clear bits in the interrupt cause register for a given group + */ +void al_iofic_clear_cause(void __iomem *regs_base, int group, uint32_t mask) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + /* inverse mask, writing 1 has no effect */ + al_reg_write32(®s->ctrl[group].int_cause_grp, ~mask); +} + +/* + * Set the cause register for a given group + */ +void al_iofic_set_cause(void __iomem *regs_base, int group, uint32_t mask) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + al_reg_write32(®s->ctrl[group].int_cause_set_grp, mask); +} + + +/* + * unmask specific interrupts from aborting the udma a given group + */ +void al_iofic_abort_mask(void __iomem *regs_base, int group, uint32_t mask) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + al_reg_write32(®s->ctrl[group].int_abort_msk_grp, mask); + +} + +/* + * trigger all interrupts that are waiting for moderation timers to expire + */ +void al_iofic_interrupt_moderation_reset(void __iomem *regs_base, int group) +{ + struct al_iofic_regs __iomem *regs = (struct al_iofic_regs __iomem *)(regs_base); + uint32_t reg = 0; + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + al_assert(regs_base); + al_assert(group < AL_IOFIC_MAX_GROUPS); + + reg = al_reg_read32(®s->ctrl[group].int_control_grp); + reg |= INT_CONTROL_GRP_MOD_RST; + + al_reg_write32(®s->ctrl[group].int_control_grp, reg); +} + +/** @} end of interrupt controller group */ |