drivers/mmc/host/tmio_mmc.h - kernel/skids - Git at Google

 /* Definitons for use with the tmio_mmc.c
  *
  * (c) 2004 Ian Molton <spyro@f2s.com>
  * (c) 2007 Ian Molton <spyro@f2s.com>
  *
  * 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.
  *
  */

 #include <linux/highmem.h>
 #include <linux/interrupt.h>
 #include <linux/dmaengine.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
 #define CTL_STATUS 0x1c
 #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_RESET_SD 0xe0
 #define CTL_SDIO_REGS 0x100
 #define CTL_CLK_AND_WAIT_CTL 0x138
 #define CTL_RESET_SDIO 0x1e0

 /* Definitions for values the CTRL_STATUS register can take. */
 #define TMIO_STAT_CMDRESPEND    0x00000001
 #define TMIO_STAT_DATAEND       0x00000004
 #define TMIO_STAT_CARD_REMOVE   0x00000008
 #define TMIO_STAT_CARD_INSERT   0x00000010
 #define TMIO_STAT_SIGSTATE      0x00000020
 #define TMIO_STAT_WRPROTECT     0x00000080
 #define TMIO_STAT_CARD_REMOVE_A 0x00000100
 #define TMIO_STAT_CARD_INSERT_A 0x00000200
 #define TMIO_STAT_SIGSTATE_A    0x00000400
 #define TMIO_STAT_CMD_IDX_ERR   0x00010000
 #define TMIO_STAT_CRCFAIL       0x00020000
 #define TMIO_STAT_STOPBIT_ERR   0x00040000
 #define TMIO_STAT_DATATIMEOUT   0x00080000
 #define TMIO_STAT_RXOVERFLOW    0x00100000
 #define TMIO_STAT_TXUNDERRUN    0x00200000
 #define TMIO_STAT_CMDTIMEOUT    0x00400000
 #define TMIO_STAT_RXRDY         0x01000000
 #define TMIO_STAT_TXRQ          0x02000000
 #define TMIO_STAT_ILL_FUNC      0x20000000
 #define TMIO_STAT_CMD_BUSY      0x40000000
 #define TMIO_STAT_ILL_ACCESS    0x80000000

 /* 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)


 #define enable_mmc_irqs(host, i) \
 	do { \
 		u32 mask;\
 		mask  = sd_ctrl_read32((host), CTL_IRQ_MASK); \
 		mask &= ~((i) & TMIO_MASK_IRQ); \
 		sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
 	} while (0)

 #define disable_mmc_irqs(host, i) \
 	do { \
 		u32 mask;\
 		mask  = sd_ctrl_read32((host), CTL_IRQ_MASK); \
 		mask |= ((i) & TMIO_MASK_IRQ); \
 		sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
 	} while (0)

 #define ack_mmc_irqs(host, i) \
 	do { \
 		sd_ctrl_write32((host), CTL_STATUS, ~(i)); \
 	} while (0)


 struct tmio_mmc_host {
 	void __iomem *ctl;
 	unsigned long bus_shift;
 	struct mmc_command      *cmd;
 	struct mmc_request      *mrq;
 	struct mmc_data         *data;
 	struct mmc_host         *mmc;
 	int                     irq;

 	/* 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;
 	unsigned int            sg_len;
 	unsigned int            sg_off;

 	struct platform_device *pdev;

 	/* DMA support */
 	struct dma_chan		*chan_rx;
 	struct dma_chan		*chan_tx;
 	struct tasklet_struct	dma_complete;
 	struct tasklet_struct	dma_issue;
 #ifdef CONFIG_TMIO_MMC_DMA
 	struct dma_async_tx_descriptor *desc;
 	unsigned int            dma_sglen;
 	dma_cookie_t		cookie;
 #endif
 };

 #include <linux/io.h>

 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)
 {
 	readsw(host->ctl + (addr << host->bus_shift), buf, count);
 }

 static inline u32 sd_ctrl_read32(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_write16(struct tmio_mmc_host *host, int addr,
 		u16 val)
 {
 	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)
 {
 	writesw(host->ctl + (addr << host->bus_shift), buf, count);
 }

 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr,
 		u32 val)
 {
 	writew(val, host->ctl + (addr << host->bus_shift));
 	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 }

 #include <linux/scatterlist.h>
 #include <linux/blkdev.h>

 static inline void tmio_mmc_init_sg(struct tmio_mmc_host *host,
 	struct mmc_data *data)
 {
 	host->sg_len = data->sg_len;
 	host->sg_ptr = data->sg;
 	host->sg_off = 0;
 }

 static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host)
 {
 	host->sg_ptr = sg_next(host->sg_ptr);
 	host->sg_off = 0;
 	return --host->sg_len;
 }

 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 	unsigned long *flags)
 {
 	local_irq_save(*flags);
 	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
 }

 static inline void tmio_mmc_kunmap_atomic(void *virt,
 	unsigned long *flags)
 {
 	kunmap_atomic(virt, KM_BIO_SRC_IRQ);
 	local_irq_restore(*flags);
 }

 #ifdef CONFIG_MMC_DEBUG

 #define STATUS_TO_TEXT(a) \
 	do { \
 		if (status & TMIO_STAT_##a) \
 			printk(#a); \
 	} while (0)

 void pr_debug_status(u32 status)
 {
 	printk(KERN_DEBUG "status: %08x = ", status);
 	STATUS_TO_TEXT(CARD_REMOVE);
 	STATUS_TO_TEXT(CARD_INSERT);
 	STATUS_TO_TEXT(SIGSTATE);
 	STATUS_TO_TEXT(WRPROTECT);
 	STATUS_TO_TEXT(CARD_REMOVE_A);
 	STATUS_TO_TEXT(CARD_INSERT_A);
 	STATUS_TO_TEXT(SIGSTATE_A);
 	STATUS_TO_TEXT(CMD_IDX_ERR);
 	STATUS_TO_TEXT(STOPBIT_ERR);
 	STATUS_TO_TEXT(ILL_FUNC);
 	STATUS_TO_TEXT(CMD_BUSY);
 	STATUS_TO_TEXT(CMDRESPEND);
 	STATUS_TO_TEXT(DATAEND);
 	STATUS_TO_TEXT(CRCFAIL);
 	STATUS_TO_TEXT(DATATIMEOUT);
 	STATUS_TO_TEXT(CMDTIMEOUT);
 	STATUS_TO_TEXT(RXOVERFLOW);
 	STATUS_TO_TEXT(TXUNDERRUN);
 	STATUS_TO_TEXT(RXRDY);
 	STATUS_TO_TEXT(TXRQ);
 	STATUS_TO_TEXT(ILL_ACCESS);
 	printk("\n");
 }

 #else
 #define pr_debug_status(s)  do { } while (0)
 #endif
	/* Definitons for use with the tmio_mmc.c
	*
	* (c) 2004 Ian Molton <spyro@f2s.com>
	* (c) 2007 Ian Molton <spyro@f2s.com>
	*
	* 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.
	*
	*/

	#include <linux/highmem.h>
	#include <linux/interrupt.h>
	#include <linux/dmaengine.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
	#define CTL_STATUS 0x1c
	#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_RESET_SD 0xe0
	#define CTL_SDIO_REGS 0x100
	#define CTL_CLK_AND_WAIT_CTL 0x138
	#define CTL_RESET_SDIO 0x1e0

	/* Definitions for values the CTRL_STATUS register can take. */
	#define TMIO_STAT_CMDRESPEND 0x00000001
	#define TMIO_STAT_DATAEND 0x00000004
	#define TMIO_STAT_CARD_REMOVE 0x00000008
	#define TMIO_STAT_CARD_INSERT 0x00000010
	#define TMIO_STAT_SIGSTATE 0x00000020
	#define TMIO_STAT_WRPROTECT 0x00000080
	#define TMIO_STAT_CARD_REMOVE_A 0x00000100
	#define TMIO_STAT_CARD_INSERT_A 0x00000200
	#define TMIO_STAT_SIGSTATE_A 0x00000400
	#define TMIO_STAT_CMD_IDX_ERR 0x00010000
	#define TMIO_STAT_CRCFAIL 0x00020000
	#define TMIO_STAT_STOPBIT_ERR 0x00040000
	#define TMIO_STAT_DATATIMEOUT 0x00080000
	#define TMIO_STAT_RXOVERFLOW 0x00100000
	#define TMIO_STAT_TXUNDERRUN 0x00200000
	#define TMIO_STAT_CMDTIMEOUT 0x00400000
	#define TMIO_STAT_RXRDY 0x01000000
	#define TMIO_STAT_TXRQ 0x02000000
	#define TMIO_STAT_ILL_FUNC 0x20000000
	#define TMIO_STAT_CMD_BUSY 0x40000000
	#define TMIO_STAT_ILL_ACCESS 0x80000000

	/* 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)


	#define enable_mmc_irqs(host, i) \
	do { \
	u32 mask;\
	mask = sd_ctrl_read32((host), CTL_IRQ_MASK); \
	mask &= ~((i) & TMIO_MASK_IRQ); \
	sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
	} while (0)

	#define disable_mmc_irqs(host, i) \
	do { \
	u32 mask;\
	mask = sd_ctrl_read32((host), CTL_IRQ_MASK); \
	mask \|= ((i) & TMIO_MASK_IRQ); \
	sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
	} while (0)

	#define ack_mmc_irqs(host, i) \
	do { \
	sd_ctrl_write32((host), CTL_STATUS, ~(i)); \
	} while (0)


	struct tmio_mmc_host {
	void __iomem *ctl;
	unsigned long bus_shift;
	struct mmc_command *cmd;
	struct mmc_request *mrq;
	struct mmc_data *data;
	struct mmc_host *mmc;
	int irq;

	/* 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;
	unsigned int sg_len;
	unsigned int sg_off;

	struct platform_device *pdev;

	/* DMA support */
	struct dma_chan *chan_rx;
	struct dma_chan *chan_tx;
	struct tasklet_struct dma_complete;
	struct tasklet_struct dma_issue;
	#ifdef CONFIG_TMIO_MMC_DMA
	struct dma_async_tx_descriptor *desc;
	unsigned int dma_sglen;
	dma_cookie_t cookie;
	#endif
	};

	#include <linux/io.h>

	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)
	{
	readsw(host->ctl + (addr << host->bus_shift), buf, count);
	}

	static inline u32 sd_ctrl_read32(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_write16(struct tmio_mmc_host *host, int addr,
	u16 val)
	{
	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)
	{
	writesw(host->ctl + (addr << host->bus_shift), buf, count);
	}

	static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr,
	u32 val)
	{
	writew(val, host->ctl + (addr << host->bus_shift));
	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
	}

	#include <linux/scatterlist.h>
	#include <linux/blkdev.h>

	static inline void tmio_mmc_init_sg(struct tmio_mmc_host *host,
	struct mmc_data *data)
	{
	host->sg_len = data->sg_len;
	host->sg_ptr = data->sg;
	host->sg_off = 0;
	}

	static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host)
	{
	host->sg_ptr = sg_next(host->sg_ptr);
	host->sg_off = 0;
	return --host->sg_len;
	}

	static inline char tmio_mmc_kmap_atomic(struct scatterlist sg,
	unsigned long *flags)
	{
	local_irq_save(*flags);
	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
	}

	static inline void tmio_mmc_kunmap_atomic(void *virt,
	unsigned long *flags)
	{
	kunmap_atomic(virt, KM_BIO_SRC_IRQ);
	local_irq_restore(*flags);
	}

	#ifdef CONFIG_MMC_DEBUG

	#define STATUS_TO_TEXT(a) \
	do { \
	if (status & TMIO_STAT_##a) \
	printk(#a); \
	} while (0)

	void pr_debug_status(u32 status)
	{
	printk(KERN_DEBUG "status: %08x = ", status);
	STATUS_TO_TEXT(CARD_REMOVE);
	STATUS_TO_TEXT(CARD_INSERT);
	STATUS_TO_TEXT(SIGSTATE);
	STATUS_TO_TEXT(WRPROTECT);
	STATUS_TO_TEXT(CARD_REMOVE_A);
	STATUS_TO_TEXT(CARD_INSERT_A);
	STATUS_TO_TEXT(SIGSTATE_A);
	STATUS_TO_TEXT(CMD_IDX_ERR);
	STATUS_TO_TEXT(STOPBIT_ERR);
	STATUS_TO_TEXT(ILL_FUNC);
	STATUS_TO_TEXT(CMD_BUSY);
	STATUS_TO_TEXT(CMDRESPEND);
	STATUS_TO_TEXT(DATAEND);
	STATUS_TO_TEXT(CRCFAIL);
	STATUS_TO_TEXT(DATATIMEOUT);
	STATUS_TO_TEXT(CMDTIMEOUT);
	STATUS_TO_TEXT(RXOVERFLOW);
	STATUS_TO_TEXT(TXUNDERRUN);
	STATUS_TO_TEXT(RXRDY);
	STATUS_TO_TEXT(TXRQ);
	STATUS_TO_TEXT(ILL_ACCESS);
	printk("\n");
	}

	#else
	#define pr_debug_status(s) do { } while (0)
	#endif