7fb3e75e18
This patch adds power management support to the dma40 driver. The DMA registers are backed up and restored, during suspend/resume. Also flags to track the dma usage have been introduced to facilitate this. Patch also includes few other minor changes, related to formatting, comments. Signed-off-by: Narayanan G <narayanan.gopalakrishnan@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
349 lines
9.8 KiB
C
349 lines
9.8 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2007-2010
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* Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson SA
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* Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson SA
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* License terms: GNU General Public License (GPL) version 2
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*/
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#ifndef STE_DMA40_LL_H
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#define STE_DMA40_LL_H
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#define D40_DREG_PCBASE 0x400
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#define D40_DREG_PCDELTA (8 * 4)
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#define D40_LLI_ALIGN 16 /* LLI alignment must be 16 bytes. */
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#define D40_LCPA_CHAN_SIZE 32
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#define D40_LCPA_CHAN_DST_DELTA 16
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#define D40_TYPE_TO_GROUP(type) (type / 16)
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#define D40_TYPE_TO_EVENT(type) (type % 16)
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#define D40_GROUP_SIZE 8
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#define D40_PHYS_TO_GROUP(phys) ((phys & (D40_GROUP_SIZE - 1)) / 2)
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/* Most bits of the CFG register are the same in log as in phy mode */
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#define D40_SREG_CFG_MST_POS 15
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#define D40_SREG_CFG_TIM_POS 14
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#define D40_SREG_CFG_EIM_POS 13
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#define D40_SREG_CFG_LOG_INCR_POS 12
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#define D40_SREG_CFG_PHY_PEN_POS 12
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#define D40_SREG_CFG_PSIZE_POS 10
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#define D40_SREG_CFG_ESIZE_POS 8
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#define D40_SREG_CFG_PRI_POS 7
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#define D40_SREG_CFG_LBE_POS 6
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#define D40_SREG_CFG_LOG_GIM_POS 5
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#define D40_SREG_CFG_LOG_MFU_POS 4
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#define D40_SREG_CFG_PHY_TM_POS 4
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#define D40_SREG_CFG_PHY_EVTL_POS 0
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/* Standard channel parameters - basic mode (element register) */
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#define D40_SREG_ELEM_PHY_ECNT_POS 16
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#define D40_SREG_ELEM_PHY_EIDX_POS 0
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#define D40_SREG_ELEM_PHY_ECNT_MASK (0xFFFF << D40_SREG_ELEM_PHY_ECNT_POS)
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/* Standard channel parameters - basic mode (Link register) */
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#define D40_SREG_LNK_PHY_TCP_POS 0
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#define D40_SREG_LNK_PHY_LMP_POS 1
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#define D40_SREG_LNK_PHY_PRE_POS 2
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/*
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* Source destination link address. Contains the
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* 29-bit byte word aligned address of the reload area.
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*/
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#define D40_SREG_LNK_PHYS_LNK_MASK 0xFFFFFFF8UL
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/* Standard basic channel logical mode */
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/* Element register */
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#define D40_SREG_ELEM_LOG_ECNT_POS 16
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#define D40_SREG_ELEM_LOG_LIDX_POS 8
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#define D40_SREG_ELEM_LOG_LOS_POS 1
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#define D40_SREG_ELEM_LOG_TCP_POS 0
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#define D40_SREG_ELEM_LOG_LIDX_MASK (0xFF << D40_SREG_ELEM_LOG_LIDX_POS)
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/* Link register */
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#define D40_DEACTIVATE_EVENTLINE 0x0
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#define D40_ACTIVATE_EVENTLINE 0x1
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#define D40_EVENTLINE_POS(i) (2 * i)
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#define D40_EVENTLINE_MASK(i) (0x3 << D40_EVENTLINE_POS(i))
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/* Standard basic channel logical params in memory */
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/* LCSP0 */
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#define D40_MEM_LCSP0_ECNT_POS 16
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#define D40_MEM_LCSP0_SPTR_POS 0
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#define D40_MEM_LCSP0_ECNT_MASK (0xFFFF << D40_MEM_LCSP0_ECNT_POS)
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#define D40_MEM_LCSP0_SPTR_MASK (0xFFFF << D40_MEM_LCSP0_SPTR_POS)
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/* LCSP1 */
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#define D40_MEM_LCSP1_SPTR_POS 16
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#define D40_MEM_LCSP1_SCFG_MST_POS 15
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#define D40_MEM_LCSP1_SCFG_TIM_POS 14
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#define D40_MEM_LCSP1_SCFG_EIM_POS 13
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#define D40_MEM_LCSP1_SCFG_INCR_POS 12
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#define D40_MEM_LCSP1_SCFG_PSIZE_POS 10
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#define D40_MEM_LCSP1_SCFG_ESIZE_POS 8
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#define D40_MEM_LCSP1_SLOS_POS 1
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#define D40_MEM_LCSP1_STCP_POS 0
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#define D40_MEM_LCSP1_SPTR_MASK (0xFFFF << D40_MEM_LCSP1_SPTR_POS)
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#define D40_MEM_LCSP1_SCFG_TIM_MASK (0x1 << D40_MEM_LCSP1_SCFG_TIM_POS)
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#define D40_MEM_LCSP1_SCFG_INCR_MASK (0x1 << D40_MEM_LCSP1_SCFG_INCR_POS)
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#define D40_MEM_LCSP1_SCFG_PSIZE_MASK (0x3 << D40_MEM_LCSP1_SCFG_PSIZE_POS)
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#define D40_MEM_LCSP1_SLOS_MASK (0x7F << D40_MEM_LCSP1_SLOS_POS)
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#define D40_MEM_LCSP1_STCP_MASK (0x1 << D40_MEM_LCSP1_STCP_POS)
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/* LCSP2 */
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#define D40_MEM_LCSP2_ECNT_POS 16
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#define D40_MEM_LCSP2_ECNT_MASK (0xFFFF << D40_MEM_LCSP2_ECNT_POS)
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/* LCSP3 */
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#define D40_MEM_LCSP3_DCFG_MST_POS 15
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#define D40_MEM_LCSP3_DCFG_TIM_POS 14
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#define D40_MEM_LCSP3_DCFG_EIM_POS 13
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#define D40_MEM_LCSP3_DCFG_INCR_POS 12
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#define D40_MEM_LCSP3_DCFG_PSIZE_POS 10
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#define D40_MEM_LCSP3_DCFG_ESIZE_POS 8
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#define D40_MEM_LCSP3_DLOS_POS 1
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#define D40_MEM_LCSP3_DTCP_POS 0
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#define D40_MEM_LCSP3_DLOS_MASK (0x7F << D40_MEM_LCSP3_DLOS_POS)
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#define D40_MEM_LCSP3_DTCP_MASK (0x1 << D40_MEM_LCSP3_DTCP_POS)
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/* Standard channel parameter register offsets */
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#define D40_CHAN_REG_SSCFG 0x00
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#define D40_CHAN_REG_SSELT 0x04
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#define D40_CHAN_REG_SSPTR 0x08
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#define D40_CHAN_REG_SSLNK 0x0C
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#define D40_CHAN_REG_SDCFG 0x10
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#define D40_CHAN_REG_SDELT 0x14
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#define D40_CHAN_REG_SDPTR 0x18
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#define D40_CHAN_REG_SDLNK 0x1C
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/* DMA Register Offsets */
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#define D40_DREG_GCC 0x000
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#define D40_DREG_GCC_ENA 0x1
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/* This assumes that there are only 4 event groups */
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#define D40_DREG_GCC_ENABLE_ALL 0xff01
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#define D40_DREG_GCC_EVTGRP_POS 8
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#define D40_DREG_GCC_SRC 0
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#define D40_DREG_GCC_DST 1
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#define D40_DREG_GCC_EVTGRP_ENA(x, y) \
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(1 << (D40_DREG_GCC_EVTGRP_POS + 2 * x + y))
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#define D40_DREG_PRTYP 0x004
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#define D40_DREG_PRSME 0x008
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#define D40_DREG_PRSMO 0x00C
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#define D40_DREG_PRMSE 0x010
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#define D40_DREG_PRMSO 0x014
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#define D40_DREG_PRMOE 0x018
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#define D40_DREG_PRMOO 0x01C
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#define D40_DREG_PRMO_PCHAN_BASIC 0x1
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#define D40_DREG_PRMO_PCHAN_MODULO 0x2
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#define D40_DREG_PRMO_PCHAN_DOUBLE_DST 0x3
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#define D40_DREG_PRMO_LCHAN_SRC_PHY_DST_LOG 0x1
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#define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_PHY 0x2
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#define D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG 0x3
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#define D40_DREG_LCPA 0x020
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#define D40_DREG_LCLA 0x024
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#define D40_DREG_ACTIVE 0x050
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#define D40_DREG_ACTIVO 0x054
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#define D40_DREG_FSEB1 0x058
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#define D40_DREG_FSEB2 0x05C
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#define D40_DREG_PCMIS 0x060
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#define D40_DREG_PCICR 0x064
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#define D40_DREG_PCTIS 0x068
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#define D40_DREG_PCEIS 0x06C
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#define D40_DREG_LCMIS0 0x080
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#define D40_DREG_LCMIS1 0x084
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#define D40_DREG_LCMIS2 0x088
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#define D40_DREG_LCMIS3 0x08C
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#define D40_DREG_LCICR0 0x090
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#define D40_DREG_LCICR1 0x094
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#define D40_DREG_LCICR2 0x098
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#define D40_DREG_LCICR3 0x09C
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#define D40_DREG_LCTIS0 0x0A0
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#define D40_DREG_LCTIS1 0x0A4
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#define D40_DREG_LCTIS2 0x0A8
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#define D40_DREG_LCTIS3 0x0AC
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#define D40_DREG_LCEIS0 0x0B0
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#define D40_DREG_LCEIS1 0x0B4
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#define D40_DREG_LCEIS2 0x0B8
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#define D40_DREG_LCEIS3 0x0BC
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#define D40_DREG_PSEG1 0x110
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#define D40_DREG_PSEG2 0x114
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#define D40_DREG_PSEG3 0x118
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#define D40_DREG_PSEG4 0x11C
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#define D40_DREG_PCEG1 0x120
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#define D40_DREG_PCEG2 0x124
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#define D40_DREG_PCEG3 0x128
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#define D40_DREG_PCEG4 0x12C
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#define D40_DREG_RSEG1 0x130
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#define D40_DREG_RSEG2 0x134
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#define D40_DREG_RSEG3 0x138
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#define D40_DREG_RSEG4 0x13C
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#define D40_DREG_RCEG1 0x140
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#define D40_DREG_RCEG2 0x144
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#define D40_DREG_RCEG3 0x148
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#define D40_DREG_RCEG4 0x14C
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#define D40_DREG_STFU 0xFC8
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#define D40_DREG_ICFG 0xFCC
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#define D40_DREG_PERIPHID0 0xFE0
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#define D40_DREG_PERIPHID1 0xFE4
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#define D40_DREG_PERIPHID2 0xFE8
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#define D40_DREG_PERIPHID3 0xFEC
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#define D40_DREG_CELLID0 0xFF0
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#define D40_DREG_CELLID1 0xFF4
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#define D40_DREG_CELLID2 0xFF8
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#define D40_DREG_CELLID3 0xFFC
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/* LLI related structures */
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/**
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* struct d40_phy_lli - The basic configration register for each physical
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* channel.
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*
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* @reg_cfg: The configuration register.
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* @reg_elt: The element register.
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* @reg_ptr: The pointer register.
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* @reg_lnk: The link register.
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*
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* These registers are set up for both physical and logical transfers
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* Note that the bit in each register means differently in logical and
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* physical(standard) mode.
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*
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* This struct must be 16 bytes aligned, and only contain physical registers
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* since it will be directly accessed by the DMA.
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*/
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struct d40_phy_lli {
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u32 reg_cfg;
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u32 reg_elt;
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u32 reg_ptr;
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u32 reg_lnk;
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};
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/**
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* struct d40_phy_lli_bidir - struct for a transfer.
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*
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* @src: Register settings for src channel.
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* @dst: Register settings for dst channel.
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*
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* All DMA transfers have a source and a destination.
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*/
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struct d40_phy_lli_bidir {
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struct d40_phy_lli *src;
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struct d40_phy_lli *dst;
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};
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/**
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* struct d40_log_lli - logical lli configuration
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*
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* @lcsp02: Either maps to register lcsp0 if src or lcsp2 if dst.
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* @lcsp13: Either maps to register lcsp1 if src or lcsp3 if dst.
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*
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* This struct must be 8 bytes aligned since it will be accessed directy by
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* the DMA. Never add any none hw mapped registers to this struct.
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*/
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struct d40_log_lli {
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u32 lcsp02;
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u32 lcsp13;
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};
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/**
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* struct d40_log_lli_bidir - For both src and dst
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*
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* @src: pointer to src lli configuration.
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* @dst: pointer to dst lli configuration.
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*
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* You always have a src and a dst when doing DMA transfers.
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*/
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struct d40_log_lli_bidir {
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struct d40_log_lli *src;
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struct d40_log_lli *dst;
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};
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/**
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* struct d40_log_lli_full - LCPA layout
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*
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* @lcsp0: Logical Channel Standard Param 0 - Src.
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* @lcsp1: Logical Channel Standard Param 1 - Src.
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* @lcsp2: Logical Channel Standard Param 2 - Dst.
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* @lcsp3: Logical Channel Standard Param 3 - Dst.
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*
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* This struct maps to LCPA physical memory layout. Must map to
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* the hw.
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*/
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struct d40_log_lli_full {
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u32 lcsp0;
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u32 lcsp1;
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u32 lcsp2;
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u32 lcsp3;
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};
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/**
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* struct d40_def_lcsp - Default LCSP1 and LCSP3 settings
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*
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* @lcsp3: The default configuration for dst.
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* @lcsp1: The default configuration for src.
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*/
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struct d40_def_lcsp {
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u32 lcsp3;
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u32 lcsp1;
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};
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/* Physical channels */
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enum d40_lli_flags {
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LLI_ADDR_INC = 1 << 0,
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LLI_TERM_INT = 1 << 1,
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LLI_CYCLIC = 1 << 2,
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LLI_LAST_LINK = 1 << 3,
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};
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void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
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u32 *src_cfg,
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u32 *dst_cfg,
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bool is_log);
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void d40_log_cfg(struct stedma40_chan_cfg *cfg,
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u32 *lcsp1,
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u32 *lcsp2);
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int d40_phy_sg_to_lli(struct scatterlist *sg,
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int sg_len,
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dma_addr_t target,
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struct d40_phy_lli *lli,
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dma_addr_t lli_phys,
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u32 reg_cfg,
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struct stedma40_half_channel_info *info,
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struct stedma40_half_channel_info *otherinfo,
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unsigned long flags);
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/* Logical channels */
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int d40_log_sg_to_lli(struct scatterlist *sg,
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int sg_len,
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dma_addr_t dev_addr,
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struct d40_log_lli *lli_sg,
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u32 lcsp13, /* src or dst*/
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u32 data_width1, u32 data_width2);
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void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
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struct d40_log_lli *lli_dst,
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struct d40_log_lli *lli_src,
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int next, unsigned int flags);
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void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
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struct d40_log_lli *lli_dst,
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struct d40_log_lli *lli_src,
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int next, unsigned int flags);
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#endif /* STE_DMA40_LLI_H */
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