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cd76e5c565
Add Support for the scatter-gather DMA available in the ThunderX MMC units. Up to 16 DMA requests can be processed together. Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
216 lines
7.1 KiB
C
216 lines
7.1 KiB
C
/*
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* Driver for MMC and SSD cards for Cavium OCTEON and ThunderX SOCs.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2012-2017 Cavium Inc.
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*/
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#ifndef _CAVIUM_MMC_H_
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#define _CAVIUM_MMC_H_
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#include <linux/bitops.h>
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#include <linux/clk.h>
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#include <linux/gpio/consumer.h>
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#include <linux/io.h>
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#include <linux/mmc/host.h>
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#include <linux/of.h>
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#include <linux/scatterlist.h>
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#include <linux/semaphore.h>
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#define CAVIUM_MAX_MMC 4
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/* DMA register addresses */
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#define MIO_EMM_DMA_FIFO_CFG(x) (0x00 + x->reg_off_dma)
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#define MIO_EMM_DMA_FIFO_ADR(x) (0x10 + x->reg_off_dma)
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#define MIO_EMM_DMA_FIFO_CMD(x) (0x18 + x->reg_off_dma)
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#define MIO_EMM_DMA_CFG(x) (0x20 + x->reg_off_dma)
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#define MIO_EMM_DMA_ADR(x) (0x28 + x->reg_off_dma)
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#define MIO_EMM_DMA_INT(x) (0x30 + x->reg_off_dma)
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#define MIO_EMM_DMA_INT_W1S(x) (0x38 + x->reg_off_dma)
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#define MIO_EMM_DMA_INT_ENA_W1S(x) (0x40 + x->reg_off_dma)
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#define MIO_EMM_DMA_INT_ENA_W1C(x) (0x48 + x->reg_off_dma)
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/* register addresses */
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#define MIO_EMM_CFG(x) (0x00 + x->reg_off)
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#define MIO_EMM_SWITCH(x) (0x48 + x->reg_off)
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#define MIO_EMM_DMA(x) (0x50 + x->reg_off)
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#define MIO_EMM_CMD(x) (0x58 + x->reg_off)
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#define MIO_EMM_RSP_STS(x) (0x60 + x->reg_off)
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#define MIO_EMM_RSP_LO(x) (0x68 + x->reg_off)
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#define MIO_EMM_RSP_HI(x) (0x70 + x->reg_off)
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#define MIO_EMM_INT(x) (0x78 + x->reg_off)
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#define MIO_EMM_INT_EN(x) (0x80 + x->reg_off)
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#define MIO_EMM_WDOG(x) (0x88 + x->reg_off)
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#define MIO_EMM_SAMPLE(x) (0x90 + x->reg_off)
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#define MIO_EMM_STS_MASK(x) (0x98 + x->reg_off)
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#define MIO_EMM_RCA(x) (0xa0 + x->reg_off)
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#define MIO_EMM_INT_EN_SET(x) (0xb0 + x->reg_off)
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#define MIO_EMM_INT_EN_CLR(x) (0xb8 + x->reg_off)
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#define MIO_EMM_BUF_IDX(x) (0xe0 + x->reg_off)
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#define MIO_EMM_BUF_DAT(x) (0xe8 + x->reg_off)
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struct cvm_mmc_host {
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struct device *dev;
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void __iomem *base;
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void __iomem *dma_base;
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int reg_off;
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int reg_off_dma;
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u64 emm_cfg;
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u64 n_minus_one; /* OCTEON II workaround location */
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int last_slot;
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struct clk *clk;
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int sys_freq;
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struct mmc_request *current_req;
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struct sg_mapping_iter smi;
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bool dma_active;
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bool use_sg;
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bool has_ciu3;
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bool big_dma_addr;
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bool need_irq_handler_lock;
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spinlock_t irq_handler_lock;
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struct semaphore mmc_serializer;
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struct gpio_desc *global_pwr_gpiod;
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atomic_t shared_power_users;
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struct cvm_mmc_slot *slot[CAVIUM_MAX_MMC];
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struct platform_device *slot_pdev[CAVIUM_MAX_MMC];
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void (*set_shared_power)(struct cvm_mmc_host *, int);
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void (*acquire_bus)(struct cvm_mmc_host *);
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void (*release_bus)(struct cvm_mmc_host *);
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void (*int_enable)(struct cvm_mmc_host *, u64);
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/* required on some MIPS models */
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void (*dmar_fixup)(struct cvm_mmc_host *, struct mmc_command *,
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struct mmc_data *, u64);
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void (*dmar_fixup_done)(struct cvm_mmc_host *);
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};
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struct cvm_mmc_slot {
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struct mmc_host *mmc; /* slot-level mmc_core object */
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struct cvm_mmc_host *host; /* common hw for all slots */
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u64 clock;
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u64 cached_switch;
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u64 cached_rca;
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unsigned int cmd_cnt; /* sample delay */
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unsigned int dat_cnt; /* sample delay */
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int bus_id;
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};
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struct cvm_mmc_cr_type {
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u8 ctype;
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u8 rtype;
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};
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struct cvm_mmc_cr_mods {
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u8 ctype_xor;
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u8 rtype_xor;
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};
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/* Bitfield definitions */
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#define MIO_EMM_DMA_FIFO_CFG_CLR BIT_ULL(16)
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#define MIO_EMM_DMA_FIFO_CFG_INT_LVL GENMASK_ULL(12, 8)
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#define MIO_EMM_DMA_FIFO_CFG_COUNT GENMASK_ULL(4, 0)
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#define MIO_EMM_DMA_FIFO_CMD_RW BIT_ULL(62)
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#define MIO_EMM_DMA_FIFO_CMD_INTDIS BIT_ULL(60)
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#define MIO_EMM_DMA_FIFO_CMD_SWAP32 BIT_ULL(59)
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#define MIO_EMM_DMA_FIFO_CMD_SWAP16 BIT_ULL(58)
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#define MIO_EMM_DMA_FIFO_CMD_SWAP8 BIT_ULL(57)
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#define MIO_EMM_DMA_FIFO_CMD_ENDIAN BIT_ULL(56)
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#define MIO_EMM_DMA_FIFO_CMD_SIZE GENMASK_ULL(55, 36)
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#define MIO_EMM_CMD_SKIP_BUSY BIT_ULL(62)
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#define MIO_EMM_CMD_BUS_ID GENMASK_ULL(61, 60)
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#define MIO_EMM_CMD_VAL BIT_ULL(59)
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#define MIO_EMM_CMD_DBUF BIT_ULL(55)
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#define MIO_EMM_CMD_OFFSET GENMASK_ULL(54, 49)
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#define MIO_EMM_CMD_CTYPE_XOR GENMASK_ULL(42, 41)
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#define MIO_EMM_CMD_RTYPE_XOR GENMASK_ULL(40, 38)
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#define MIO_EMM_CMD_IDX GENMASK_ULL(37, 32)
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#define MIO_EMM_CMD_ARG GENMASK_ULL(31, 0)
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#define MIO_EMM_DMA_SKIP_BUSY BIT_ULL(62)
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#define MIO_EMM_DMA_BUS_ID GENMASK_ULL(61, 60)
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#define MIO_EMM_DMA_VAL BIT_ULL(59)
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#define MIO_EMM_DMA_SECTOR BIT_ULL(58)
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#define MIO_EMM_DMA_DAT_NULL BIT_ULL(57)
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#define MIO_EMM_DMA_THRES GENMASK_ULL(56, 51)
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#define MIO_EMM_DMA_REL_WR BIT_ULL(50)
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#define MIO_EMM_DMA_RW BIT_ULL(49)
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#define MIO_EMM_DMA_MULTI BIT_ULL(48)
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#define MIO_EMM_DMA_BLOCK_CNT GENMASK_ULL(47, 32)
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#define MIO_EMM_DMA_CARD_ADDR GENMASK_ULL(31, 0)
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#define MIO_EMM_DMA_CFG_EN BIT_ULL(63)
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#define MIO_EMM_DMA_CFG_RW BIT_ULL(62)
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#define MIO_EMM_DMA_CFG_CLR BIT_ULL(61)
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#define MIO_EMM_DMA_CFG_SWAP32 BIT_ULL(59)
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#define MIO_EMM_DMA_CFG_SWAP16 BIT_ULL(58)
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#define MIO_EMM_DMA_CFG_SWAP8 BIT_ULL(57)
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#define MIO_EMM_DMA_CFG_ENDIAN BIT_ULL(56)
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#define MIO_EMM_DMA_CFG_SIZE GENMASK_ULL(55, 36)
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#define MIO_EMM_DMA_CFG_ADR GENMASK_ULL(35, 0)
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#define MIO_EMM_INT_SWITCH_ERR BIT_ULL(6)
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#define MIO_EMM_INT_SWITCH_DONE BIT_ULL(5)
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#define MIO_EMM_INT_DMA_ERR BIT_ULL(4)
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#define MIO_EMM_INT_CMD_ERR BIT_ULL(3)
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#define MIO_EMM_INT_DMA_DONE BIT_ULL(2)
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#define MIO_EMM_INT_CMD_DONE BIT_ULL(1)
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#define MIO_EMM_INT_BUF_DONE BIT_ULL(0)
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#define MIO_EMM_RSP_STS_BUS_ID GENMASK_ULL(61, 60)
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#define MIO_EMM_RSP_STS_CMD_VAL BIT_ULL(59)
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#define MIO_EMM_RSP_STS_SWITCH_VAL BIT_ULL(58)
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#define MIO_EMM_RSP_STS_DMA_VAL BIT_ULL(57)
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#define MIO_EMM_RSP_STS_DMA_PEND BIT_ULL(56)
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#define MIO_EMM_RSP_STS_DBUF_ERR BIT_ULL(28)
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#define MIO_EMM_RSP_STS_DBUF BIT_ULL(23)
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#define MIO_EMM_RSP_STS_BLK_TIMEOUT BIT_ULL(22)
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#define MIO_EMM_RSP_STS_BLK_CRC_ERR BIT_ULL(21)
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#define MIO_EMM_RSP_STS_RSP_BUSYBIT BIT_ULL(20)
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#define MIO_EMM_RSP_STS_STP_TIMEOUT BIT_ULL(19)
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#define MIO_EMM_RSP_STS_STP_CRC_ERR BIT_ULL(18)
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#define MIO_EMM_RSP_STS_STP_BAD_STS BIT_ULL(17)
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#define MIO_EMM_RSP_STS_STP_VAL BIT_ULL(16)
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#define MIO_EMM_RSP_STS_RSP_TIMEOUT BIT_ULL(15)
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#define MIO_EMM_RSP_STS_RSP_CRC_ERR BIT_ULL(14)
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#define MIO_EMM_RSP_STS_RSP_BAD_STS BIT_ULL(13)
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#define MIO_EMM_RSP_STS_RSP_VAL BIT_ULL(12)
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#define MIO_EMM_RSP_STS_RSP_TYPE GENMASK_ULL(11, 9)
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#define MIO_EMM_RSP_STS_CMD_TYPE GENMASK_ULL(8, 7)
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#define MIO_EMM_RSP_STS_CMD_IDX GENMASK_ULL(6, 1)
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#define MIO_EMM_RSP_STS_CMD_DONE BIT_ULL(0)
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#define MIO_EMM_SAMPLE_CMD_CNT GENMASK_ULL(25, 16)
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#define MIO_EMM_SAMPLE_DAT_CNT GENMASK_ULL(9, 0)
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#define MIO_EMM_SWITCH_BUS_ID GENMASK_ULL(61, 60)
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#define MIO_EMM_SWITCH_EXE BIT_ULL(59)
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#define MIO_EMM_SWITCH_ERR0 BIT_ULL(58)
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#define MIO_EMM_SWITCH_ERR1 BIT_ULL(57)
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#define MIO_EMM_SWITCH_ERR2 BIT_ULL(56)
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#define MIO_EMM_SWITCH_HS_TIMING BIT_ULL(48)
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#define MIO_EMM_SWITCH_BUS_WIDTH GENMASK_ULL(42, 40)
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#define MIO_EMM_SWITCH_POWER_CLASS GENMASK_ULL(35, 32)
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#define MIO_EMM_SWITCH_CLK_HI GENMASK_ULL(31, 16)
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#define MIO_EMM_SWITCH_CLK_LO GENMASK_ULL(15, 0)
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/* Protoypes */
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irqreturn_t cvm_mmc_interrupt(int irq, void *dev_id);
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int cvm_mmc_of_slot_probe(struct device *dev, struct cvm_mmc_host *host);
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int cvm_mmc_of_slot_remove(struct cvm_mmc_slot *slot);
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extern const char *cvm_mmc_irq_names[];
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#endif
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