diff options
Diffstat (limited to 'drivers/mmc/host/tmio_mmc.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.c | 215 |
1 files changed, 210 insertions, 5 deletions
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index 63115a6de93..e04c032abb1 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -25,16 +25,221 @@ * double buffer support * */ -#include <linux/module.h> -#include <linux/irq.h> -#include <linux/device.h> + #include <linux/delay.h> +#include <linux/device.h> #include <linux/dmaengine.h> -#include <linux/mmc/host.h> +#include <linux/highmem.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> #include <linux/mfd/core.h> #include <linux/mfd/tmio.h> +#include <linux/mmc/host.h> +#include <linux/module.h> +#include <linux/pagemap.h> +#include <linux/scatterlist.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 + unsigned int dma_sglen; +#endif +}; -#include "tmio_mmc.h" +static u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) +{ + return readw(host->ctl + (addr << host->bus_shift)); +} + +static 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 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 void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) +{ + writew(val, host->ctl + (addr << host->bus_shift)); +} + +static 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 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)); +} + +static 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 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 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 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 static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) { |