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288 lines
9.1 KiB
288 lines
9.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Driver for the MMC / SD / SDIO cell found in: |
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* |
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* TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 |
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* |
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* Copyright (C) 2015-19 Renesas Electronics Corporation |
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* Copyright (C) 2016-19 Sang Engineering, Wolfram Sang |
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* Copyright (C) 2016-17 Horms Solutions, Simon Horman |
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* Copyright (C) 2007 Ian Molton |
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* Copyright (C) 2004 Ian Molton |
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*/ |
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#ifndef TMIO_MMC_H |
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#define TMIO_MMC_H |
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#include <linux/dmaengine.h> |
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#include <linux/highmem.h> |
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#include <linux/mutex.h> |
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#include <linux/pagemap.h> |
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#include <linux/scatterlist.h> |
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#include <linux/spinlock.h> |
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#include <linux/interrupt.h> |
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#define CTL_SD_CMD 0x00 |
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#define CTL_ARG_REG 0x04 |
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#define CTL_STOP_INTERNAL_ACTION 0x08 |
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#define CTL_XFER_BLK_COUNT 0xa |
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#define CTL_RESPONSE 0x0c |
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/* driver merges STATUS and following STATUS2 */ |
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#define CTL_STATUS 0x1c |
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/* driver merges IRQ_MASK and following IRQ_MASK2 */ |
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#define CTL_IRQ_MASK 0x20 |
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#define CTL_SD_CARD_CLK_CTL 0x24 |
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#define CTL_SD_XFER_LEN 0x26 |
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#define CTL_SD_MEM_CARD_OPT 0x28 |
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#define CTL_SD_ERROR_DETAIL_STATUS 0x2c |
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#define CTL_SD_DATA_PORT 0x30 |
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#define CTL_TRANSACTION_CTL 0x34 |
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#define CTL_SDIO_STATUS 0x36 |
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#define CTL_SDIO_IRQ_MASK 0x38 |
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#define CTL_DMA_ENABLE 0xd8 |
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#define CTL_RESET_SD 0xe0 |
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#define CTL_VERSION 0xe2 |
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#define CTL_SDIF_MODE 0xe6 /* only known on R-Car 2+ */ |
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/* Definitions for values the CTL_STOP_INTERNAL_ACTION register can take */ |
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#define TMIO_STOP_STP BIT(0) |
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#define TMIO_STOP_SEC BIT(8) |
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/* Definitions for values the CTL_STATUS register can take */ |
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#define TMIO_STAT_CMDRESPEND BIT(0) |
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#define TMIO_STAT_DATAEND BIT(2) |
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#define TMIO_STAT_CARD_REMOVE BIT(3) |
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#define TMIO_STAT_CARD_INSERT BIT(4) |
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#define TMIO_STAT_SIGSTATE BIT(5) |
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#define TMIO_STAT_WRPROTECT BIT(7) |
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#define TMIO_STAT_CARD_REMOVE_A BIT(8) |
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#define TMIO_STAT_CARD_INSERT_A BIT(9) |
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#define TMIO_STAT_SIGSTATE_A BIT(10) |
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/* These belong technically to CTL_STATUS2, but the driver merges them */ |
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#define TMIO_STAT_CMD_IDX_ERR BIT(16) |
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#define TMIO_STAT_CRCFAIL BIT(17) |
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#define TMIO_STAT_STOPBIT_ERR BIT(18) |
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#define TMIO_STAT_DATATIMEOUT BIT(19) |
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#define TMIO_STAT_RXOVERFLOW BIT(20) |
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#define TMIO_STAT_TXUNDERRUN BIT(21) |
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#define TMIO_STAT_CMDTIMEOUT BIT(22) |
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#define TMIO_STAT_DAT0 BIT(23) /* only known on R-Car so far */ |
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#define TMIO_STAT_RXRDY BIT(24) |
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#define TMIO_STAT_TXRQ BIT(25) |
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#define TMIO_STAT_ALWAYS_SET_27 BIT(27) /* only known on R-Car 2+ so far */ |
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#define TMIO_STAT_ILL_FUNC BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */ |
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#define TMIO_STAT_SCLKDIVEN BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */ |
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#define TMIO_STAT_CMD_BUSY BIT(30) |
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#define TMIO_STAT_ILL_ACCESS BIT(31) |
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/* Definitions for values the CTL_SD_CARD_CLK_CTL register can take */ |
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#define CLK_CTL_DIV_MASK 0xff |
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#define CLK_CTL_SCLKEN BIT(8) |
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/* Definitions for values the CTL_SD_MEM_CARD_OPT register can take */ |
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#define CARD_OPT_TOP_MASK 0xf0 |
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#define CARD_OPT_TOP_SHIFT 4 |
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#define CARD_OPT_EXTOP BIT(9) /* first appeared on R-Car Gen3 SDHI */ |
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#define CARD_OPT_WIDTH8 BIT(13) |
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#define CARD_OPT_ALWAYS1 BIT(14) |
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#define CARD_OPT_WIDTH BIT(15) |
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/* Definitions for values the CTL_SDIO_STATUS register can take */ |
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#define TMIO_SDIO_STAT_IOIRQ 0x0001 |
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#define TMIO_SDIO_STAT_EXPUB52 0x4000 |
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#define TMIO_SDIO_STAT_EXWT 0x8000 |
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#define TMIO_SDIO_MASK_ALL 0xc007 |
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#define TMIO_SDIO_SETBITS_MASK 0x0006 |
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/* Definitions for values the CTL_DMA_ENABLE register can take */ |
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#define DMA_ENABLE_DMASDRW BIT(1) |
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/* Definitions for values the CTL_SDIF_MODE register can take */ |
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#define SDIF_MODE_HS400 BIT(0) /* only known on R-Car 2+ */ |
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/* Define some IRQ masks */ |
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/* This is the mask used at reset by the chip */ |
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#define TMIO_MASK_ALL 0x837f031d |
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#define TMIO_MASK_ALL_RCAR2 0x8b7f031d |
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#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) |
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#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) |
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#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ |
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TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) |
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#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) |
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#define TMIO_MAX_BLK_SIZE 512 |
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struct tmio_mmc_data; |
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struct tmio_mmc_host; |
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struct tmio_mmc_dma_ops { |
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void (*start)(struct tmio_mmc_host *host, struct mmc_data *data); |
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void (*enable)(struct tmio_mmc_host *host, bool enable); |
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void (*request)(struct tmio_mmc_host *host, |
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struct tmio_mmc_data *pdata); |
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void (*release)(struct tmio_mmc_host *host); |
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void (*abort)(struct tmio_mmc_host *host); |
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void (*dataend)(struct tmio_mmc_host *host); |
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/* optional */ |
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void (*end)(struct tmio_mmc_host *host); /* held host->lock */ |
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}; |
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struct tmio_mmc_host { |
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void __iomem *ctl; |
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struct mmc_command *cmd; |
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struct mmc_request *mrq; |
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struct mmc_data *data; |
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struct mmc_host *mmc; |
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struct mmc_host_ops ops; |
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/* Callbacks for clock / power control */ |
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void (*set_pwr)(struct platform_device *host, int state); |
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/* pio related stuff */ |
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struct scatterlist *sg_ptr; |
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struct scatterlist *sg_orig; |
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unsigned int sg_len; |
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unsigned int sg_off; |
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unsigned int bus_shift; |
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struct platform_device *pdev; |
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struct tmio_mmc_data *pdata; |
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/* DMA support */ |
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bool dma_on; |
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struct dma_chan *chan_rx; |
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struct dma_chan *chan_tx; |
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struct tasklet_struct dma_issue; |
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struct scatterlist bounce_sg; |
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u8 *bounce_buf; |
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/* Track lost interrupts */ |
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struct delayed_work delayed_reset_work; |
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struct work_struct done; |
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/* Cache */ |
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u32 sdcard_irq_mask; |
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u32 sdio_irq_mask; |
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unsigned int clk_cache; |
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u32 sdcard_irq_setbit_mask; |
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u32 sdcard_irq_mask_all; |
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spinlock_t lock; /* protect host private data */ |
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unsigned long last_req_ts; |
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struct mutex ios_lock; /* protect set_ios() context */ |
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bool native_hotplug; |
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bool sdio_irq_enabled; |
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/* Mandatory callback */ |
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int (*clk_enable)(struct tmio_mmc_host *host); |
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void (*set_clock)(struct tmio_mmc_host *host, unsigned int clock); |
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/* Optional callbacks */ |
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void (*clk_disable)(struct tmio_mmc_host *host); |
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int (*multi_io_quirk)(struct mmc_card *card, |
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unsigned int direction, int blk_size); |
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int (*write16_hook)(struct tmio_mmc_host *host, int addr); |
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void (*reset)(struct tmio_mmc_host *host, bool preserve); |
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bool (*check_retune)(struct tmio_mmc_host *host, struct mmc_request *mrq); |
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void (*fixup_request)(struct tmio_mmc_host *host, struct mmc_request *mrq); |
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unsigned int (*get_timeout_cycles)(struct tmio_mmc_host *host); |
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const struct tmio_mmc_dma_ops *dma_ops; |
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}; |
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struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev, |
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struct tmio_mmc_data *pdata); |
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void tmio_mmc_host_free(struct tmio_mmc_host *host); |
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int tmio_mmc_host_probe(struct tmio_mmc_host *host); |
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void tmio_mmc_host_remove(struct tmio_mmc_host *host); |
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void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); |
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void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); |
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void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); |
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irqreturn_t tmio_mmc_irq(int irq, void *devid); |
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static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, |
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unsigned long *flags) |
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{ |
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local_irq_save(*flags); |
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return kmap_atomic(sg_page(sg)) + sg->offset; |
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} |
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static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, |
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unsigned long *flags, void *virt) |
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{ |
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kunmap_atomic(virt - sg->offset); |
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local_irq_restore(*flags); |
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} |
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#ifdef CONFIG_PM |
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int tmio_mmc_host_runtime_suspend(struct device *dev); |
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int tmio_mmc_host_runtime_resume(struct device *dev); |
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#endif |
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static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) |
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{ |
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return ioread16(host->ctl + (addr << host->bus_shift)); |
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} |
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static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, |
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u16 *buf, int count) |
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{ |
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ioread16_rep(host->ctl + (addr << host->bus_shift), buf, count); |
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} |
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static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, |
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int addr) |
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{ |
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return ioread16(host->ctl + (addr << host->bus_shift)) | |
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ioread16(host->ctl + ((addr + 2) << host->bus_shift)) << 16; |
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} |
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static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr, |
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u32 *buf, int count) |
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{ |
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ioread32_rep(host->ctl + (addr << host->bus_shift), buf, count); |
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} |
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static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, |
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u16 val) |
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{ |
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/* If there is a hook and it returns non-zero then there |
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* is an error and the write should be skipped |
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*/ |
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if (host->write16_hook && host->write16_hook(host, addr)) |
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return; |
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iowrite16(val, host->ctl + (addr << host->bus_shift)); |
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} |
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static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, |
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u16 *buf, int count) |
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{ |
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iowrite16_rep(host->ctl + (addr << host->bus_shift), buf, count); |
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} |
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static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, |
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int addr, u32 val) |
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{ |
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if (addr == CTL_IRQ_MASK || addr == CTL_STATUS) |
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val |= host->sdcard_irq_setbit_mask; |
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iowrite16(val & 0xffff, host->ctl + (addr << host->bus_shift)); |
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iowrite16(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); |
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} |
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static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) |
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{ |
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iowrite32(val, host->ctl + (addr << host->bus_shift)); |
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} |
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static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr, |
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const u32 *buf, int count) |
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{ |
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iowrite32_rep(host->ctl + (addr << host->bus_shift), buf, count); |
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} |
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#endif
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