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linux/drivers/mmc/host/tmio_mmc.h
Guennadi Liakhovetski 311f3ac768 mmc: add DMA support to tmio_mmc driver, when used on SuperH 
SDHI controllers on SuperH, served by the tmio_mmc driver, can use slave DMA
for data transfer. This patch adds support for the dmaengine API to the
tmio_mmc driver.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-05-22 16:51:18 +09:00

233 lines
6.3 KiB
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/* 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 { \
u32 mask;\
mask = sd_ctrl_read32((host), CTL_STATUS); \
mask &= ~((i) & TMIO_MASK_IRQ); \
sd_ctrl_write32((host), CTL_STATUS, mask); \
} 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 tmio_mmc_host *host,
unsigned long *flags)
{
struct scatterlist *sg = host->sg_ptr;
local_irq_save(*flags);
return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
}
static inline void tmio_mmc_kunmap_atomic(struct tmio_mmc_host *host,
unsigned long *flags)
{
kunmap_atomic(sg_page(host->sg_ptr), 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
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