| /* |
| * Driver for the MMC / SD / SDIO cell found in: |
| * |
| * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 |
| * |
| * Copyright (C) 2015-17 Renesas Electronics Corporation |
| * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang |
| * Copyright (C) 2016-17 Horms Solutions, Simon Horman |
| * Copyright (C) 2007 Ian Molton |
| * Copyright (C) 2004 Ian Molton |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #ifndef TMIO_MMC_H |
| #define TMIO_MMC_H |
| |
| #include <linux/dmaengine.h> |
| #include <linux/highmem.h> |
| #include <linux/mutex.h> |
| #include <linux/pagemap.h> |
| #include <linux/scatterlist.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| |
| #define CTL_SD_CMD 0x00 |
| #define CTL_ARG_REG 0x04 |
| #define CTL_STOP_INTERNAL_ACTION 0x08 |
| #define CTL_XFER_BLK_COUNT 0xa |
| #define CTL_RESPONSE 0x0c |
| /* driver merges STATUS and following STATUS2 */ |
| #define CTL_STATUS 0x1c |
| /* driver merges IRQ_MASK and following IRQ_MASK2 */ |
| #define CTL_IRQ_MASK 0x20 |
| #define CTL_SD_CARD_CLK_CTL 0x24 |
| #define CTL_SD_XFER_LEN 0x26 |
| #define CTL_SD_MEM_CARD_OPT 0x28 |
| #define CTL_SD_ERROR_DETAIL_STATUS 0x2c |
| #define CTL_SD_DATA_PORT 0x30 |
| #define CTL_TRANSACTION_CTL 0x34 |
| #define CTL_SDIO_STATUS 0x36 |
| #define CTL_SDIO_IRQ_MASK 0x38 |
| #define CTL_DMA_ENABLE 0xd8 |
| #define CTL_RESET_SD 0xe0 |
| #define CTL_VERSION 0xe2 |
| #define CTL_SDIO_REGS 0x100 |
| #define CTL_CLK_AND_WAIT_CTL 0x138 |
| #define CTL_RESET_SDIO 0x1e0 |
| |
| /* Definitions for values the CTL_STOP_INTERNAL_ACTION register can take */ |
| #define TMIO_STOP_STP BIT(0) |
| #define TMIO_STOP_SEC BIT(8) |
| |
| /* Definitions for values the CTL_STATUS register can take */ |
| #define TMIO_STAT_CMDRESPEND BIT(0) |
| #define TMIO_STAT_DATAEND BIT(2) |
| #define TMIO_STAT_CARD_REMOVE BIT(3) |
| #define TMIO_STAT_CARD_INSERT BIT(4) |
| #define TMIO_STAT_SIGSTATE BIT(5) |
| #define TMIO_STAT_WRPROTECT BIT(7) |
| #define TMIO_STAT_CARD_REMOVE_A BIT(8) |
| #define TMIO_STAT_CARD_INSERT_A BIT(9) |
| #define TMIO_STAT_SIGSTATE_A BIT(10) |
| |
| /* These belong technically to CTL_STATUS2, but the driver merges them */ |
| #define TMIO_STAT_CMD_IDX_ERR BIT(16) |
| #define TMIO_STAT_CRCFAIL BIT(17) |
| #define TMIO_STAT_STOPBIT_ERR BIT(18) |
| #define TMIO_STAT_DATATIMEOUT BIT(19) |
| #define TMIO_STAT_RXOVERFLOW BIT(20) |
| #define TMIO_STAT_TXUNDERRUN BIT(21) |
| #define TMIO_STAT_CMDTIMEOUT BIT(22) |
| #define TMIO_STAT_DAT0 BIT(23) /* only known on R-Car so far */ |
| #define TMIO_STAT_RXRDY BIT(24) |
| #define TMIO_STAT_TXRQ BIT(25) |
| #define TMIO_STAT_ILL_FUNC BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */ |
| #define TMIO_STAT_SCLKDIVEN BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */ |
| #define TMIO_STAT_CMD_BUSY BIT(30) |
| #define TMIO_STAT_ILL_ACCESS BIT(31) |
| |
| /* Definitions for values the CTL_SD_CARD_CLK_CTL register can take */ |
| #define CLK_CTL_DIV_MASK 0xff |
| #define CLK_CTL_SCLKEN BIT(8) |
| |
| /* Definitions for values the CTL_SD_MEM_CARD_OPT register can take */ |
| #define CARD_OPT_WIDTH8 BIT(13) |
| #define CARD_OPT_WIDTH BIT(15) |
| |
| /* Definitions for values the CTL_SDIO_STATUS register can take */ |
| #define TMIO_SDIO_STAT_IOIRQ 0x0001 |
| #define TMIO_SDIO_STAT_EXPUB52 0x4000 |
| #define TMIO_SDIO_STAT_EXWT 0x8000 |
| #define TMIO_SDIO_MASK_ALL 0xc007 |
| |
| #define TMIO_SDIO_SETBITS_MASK 0x0006 |
| |
| /* Definitions for values the CTL_DMA_ENABLE register can take */ |
| #define DMA_ENABLE_DMASDRW BIT(1) |
| |
| /* Define some IRQ masks */ |
| /* This is the mask used at reset by the chip */ |
| #define TMIO_MASK_ALL 0x837f031d |
| #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) |
| #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) |
| #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ |
| TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) |
| #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) |
| |
| struct tmio_mmc_data; |
| struct tmio_mmc_host; |
| |
| struct tmio_mmc_dma_ops { |
| void (*start)(struct tmio_mmc_host *host, struct mmc_data *data); |
| void (*enable)(struct tmio_mmc_host *host, bool enable); |
| void (*request)(struct tmio_mmc_host *host, |
| struct tmio_mmc_data *pdata); |
| void (*release)(struct tmio_mmc_host *host); |
| void (*abort)(struct tmio_mmc_host *host); |
| void (*dataend)(struct tmio_mmc_host *host); |
| }; |
| |
| struct tmio_mmc_host { |
| void __iomem *ctl; |
| struct mmc_command *cmd; |
| struct mmc_request *mrq; |
| struct mmc_data *data; |
| struct mmc_host *mmc; |
| struct mmc_host_ops ops; |
| |
| /* Callbacks for clock / power control */ |
| void (*set_pwr)(struct platform_device *host, int state); |
| void (*set_clk_div)(struct platform_device *host, int state); |
| |
| /* pio related stuff */ |
| struct scatterlist *sg_ptr; |
| struct scatterlist *sg_orig; |
| unsigned int sg_len; |
| unsigned int sg_off; |
| unsigned int bus_shift; |
| |
| struct platform_device *pdev; |
| struct tmio_mmc_data *pdata; |
| |
| /* DMA support */ |
| bool force_pio; |
| struct dma_chan *chan_rx; |
| struct dma_chan *chan_tx; |
| struct tasklet_struct dma_issue; |
| struct scatterlist bounce_sg; |
| u8 *bounce_buf; |
| |
| /* Track lost interrupts */ |
| struct delayed_work delayed_reset_work; |
| struct work_struct done; |
| |
| /* Cache */ |
| u32 sdcard_irq_mask; |
| u32 sdio_irq_mask; |
| unsigned int clk_cache; |
| |
| spinlock_t lock; /* protect host private data */ |
| unsigned long last_req_ts; |
| struct mutex ios_lock; /* protect set_ios() context */ |
| bool native_hotplug; |
| bool sdio_irq_enabled; |
| |
| /* Mandatory callback */ |
| int (*clk_enable)(struct tmio_mmc_host *host); |
| |
| /* Optional callbacks */ |
| unsigned int (*clk_update)(struct tmio_mmc_host *host, |
| unsigned int new_clock); |
| void (*clk_disable)(struct tmio_mmc_host *host); |
| int (*multi_io_quirk)(struct mmc_card *card, |
| unsigned int direction, int blk_size); |
| int (*write16_hook)(struct tmio_mmc_host *host, int addr); |
| void (*hw_reset)(struct tmio_mmc_host *host); |
| void (*prepare_tuning)(struct tmio_mmc_host *host, unsigned long tap); |
| bool (*check_scc_error)(struct tmio_mmc_host *host); |
| |
| /* |
| * Mandatory callback for tuning to occur which is optional for SDR50 |
| * and mandatory for SDR104. |
| */ |
| unsigned int (*init_tuning)(struct tmio_mmc_host *host); |
| int (*select_tuning)(struct tmio_mmc_host *host); |
| |
| /* Tuning values: 1 for success, 0 for failure */ |
| DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long)); |
| unsigned int tap_num; |
| |
| const struct tmio_mmc_dma_ops *dma_ops; |
| }; |
| |
| struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev); |
| void tmio_mmc_host_free(struct tmio_mmc_host *host); |
| int tmio_mmc_host_probe(struct tmio_mmc_host *host, |
| struct tmio_mmc_data *pdata, |
| const struct tmio_mmc_dma_ops *dma_ops); |
| void tmio_mmc_host_remove(struct tmio_mmc_host *host); |
| void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); |
| |
| void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); |
| void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); |
| irqreturn_t tmio_mmc_irq(int irq, void *devid); |
| |
| static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, |
| unsigned long *flags) |
| { |
| local_irq_save(*flags); |
| return kmap_atomic(sg_page(sg)) + sg->offset; |
| } |
| |
| static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, |
| unsigned long *flags, void *virt) |
| { |
| kunmap_atomic(virt - sg->offset); |
| local_irq_restore(*flags); |
| } |
| |
| #ifdef CONFIG_PM |
| int tmio_mmc_host_runtime_suspend(struct device *dev); |
| int tmio_mmc_host_runtime_resume(struct device *dev); |
| #endif |
| |
| static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) |
| { |
| return readw(host->ctl + (addr << host->bus_shift)); |
| } |
| |
| static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, |
| u16 *buf, int count) |
| { |
| ioread16_rep(host->ctl + (addr << host->bus_shift), buf, count); |
| } |
| |
| static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, |
| int addr) |
| { |
| return readw(host->ctl + (addr << host->bus_shift)) | |
| readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; |
| } |
| |
| static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr, |
| u32 *buf, int count) |
| { |
| ioread32_rep(host->ctl + (addr << host->bus_shift), buf, count); |
| } |
| |
| static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, |
| u16 val) |
| { |
| /* If there is a hook and it returns non-zero then there |
| * is an error and the write should be skipped |
| */ |
| if (host->write16_hook && host->write16_hook(host, addr)) |
| return; |
| writew(val, host->ctl + (addr << host->bus_shift)); |
| } |
| |
| static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, |
| u16 *buf, int count) |
| { |
| iowrite16_rep(host->ctl + (addr << host->bus_shift), buf, count); |
| } |
| |
| static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, |
| int addr, u32 val) |
| { |
| writew(val & 0xffff, host->ctl + (addr << host->bus_shift)); |
| writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); |
| } |
| |
| static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr, |
| const u32 *buf, int count) |
| { |
| iowrite32_rep(host->ctl + (addr << host->bus_shift), buf, count); |
| } |
| |
| #endif |