diff options
Diffstat (limited to 'drivers/mmc/host/tmio_mmc.h')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.h | 279 |
1 files changed, 133 insertions, 146 deletions
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index 0fedc78e3ea..100ffe0b2fa 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -1,58 +1,33 @@ -/* Definitons for use with the tmio_mmc.c +/* + * linux/drivers/mmc/host/tmio_mmc.h * - * (c) 2004 Ian Molton <spyro@f2s.com> - * (c) 2007 Ian Molton <spyro@f2s.com> + * 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. * + * Driver for the MMC / SD / SDIO cell found in: + * + * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 */ +#ifndef TMIO_MMC_H +#define TMIO_MMC_H + #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 +#include <linux/mmc/tmio.h> +#include <linux/mutex.h> +#include <linux/pagemap.h> +#include <linux/scatterlist.h> +#include <linux/spinlock.h> + +/* Definitions for values the CTRL_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 some IRQ masks */ /* This is the mask used at reset by the chip */ @@ -63,37 +38,33 @@ 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_data; + +/* + * We differentiate between the following 3 power states: + * 1. card slot powered off, controller stopped. This is used, when either there + * is no card in the slot, or the card really has to be powered down. + * 2. card slot powered on, controller stopped. This is used, when a card is in + * the slot, but no activity is currently taking place. This is a power- + * saving mode with card-state preserved. This state can be entered, e.g. + * when MMC clock-gating is used. + * 3. card slot powered on, controller running. This is the actual active state. + */ +enum tmio_mmc_power { + TMIO_MMC_OFF_STOP, /* card power off, controller stopped */ + TMIO_MMC_ON_STOP, /* card power on, controller stopped */ + TMIO_MMC_ON_RUN, /* card power on, controller running */ +}; 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; + + /* Controller and card power state */ + enum tmio_mmc_power power; /* Callbacks for clock / power control */ void (*set_pwr)(struct platform_device *host, int state); @@ -101,128 +72,144 @@ struct tmio_mmc_host { /* pio related stuff */ struct scatterlist *sg_ptr; + struct scatterlist *sg_orig; unsigned int sg_len; unsigned int sg_off; 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_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 + struct scatterlist bounce_sg; + u8 *bounce_buf; + + /* Track lost interrupts */ + struct delayed_work delayed_reset_work; + struct work_struct done; + + /* Cache IRQ mask */ + u32 sdcard_irq_mask; + u32 sdio_irq_mask; + + spinlock_t lock; /* protect host private data */ + unsigned long last_req_ts; + struct mutex ios_lock; /* protect set_ios() context */ + bool native_hotplug; + bool resuming; }; -#include <linux/io.h> +int tmio_mmc_host_probe(struct tmio_mmc_host **host, + struct platform_device *pdev, + struct tmio_mmc_data *pdata); +void tmio_mmc_host_remove(struct tmio_mmc_host *host); +void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); -static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) +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); +irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); +irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); +irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); + +static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, + unsigned long *flags) { - return readw(host->ctl + (addr << host->bus_shift)); + local_irq_save(*flags); + return kmap_atomic(sg_page(sg)) + sg->offset; } -static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, - u16 *buf, int count) +static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, + unsigned long *flags, void *virt) { - readsw(host->ctl + (addr << host->bus_shift), buf, count); + kunmap_atomic(virt - sg->offset); + local_irq_restore(*flags); } -static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) +#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) +void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); +void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); +void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); +void tmio_mmc_release_dma(struct tmio_mmc_host *host); +void tmio_mmc_abort_dma(struct tmio_mmc_host *host); +#else +static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, + struct mmc_data *data) { - 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) +static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) { - 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) +static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, + struct tmio_mmc_data *pdata) { - writesw(host->ctl + (addr << host->bus_shift), buf, count); + host->chan_tx = NULL; + host->chan_rx = NULL; } -static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, - u32 val) +static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) { - 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) +static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) { - host->sg_len = data->sg_len; - host->sg_ptr = data->sg; - host->sg_off = 0; } +#endif -static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host) +#ifdef CONFIG_PM_SLEEP +int tmio_mmc_host_suspend(struct device *dev); +int tmio_mmc_host_resume(struct device *dev); +#endif + +#ifdef CONFIG_PM_RUNTIME +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) { - host->sg_ptr = sg_next(host->sg_ptr); - host->sg_off = 0; - return --host->sg_len; + return readw(host->ctl + (addr << host->pdata->bus_shift)); } -static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, - unsigned long *flags) +static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, + u16 *buf, int count) { - local_irq_save(*flags); - return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; + readsw(host->ctl + (addr << host->pdata->bus_shift), buf, count); } -static inline void tmio_mmc_kunmap_atomic(void *virt, - unsigned long *flags) +static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) { - kunmap_atomic(virt, KM_BIO_SRC_IRQ); - local_irq_restore(*flags); + return readw(host->ctl + (addr << host->pdata->bus_shift)) | + readw(host->ctl + ((addr + 2) << host->pdata->bus_shift)) << 16; } -#ifdef CONFIG_MMC_DEBUG +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->pdata->write16_hook && host->pdata->write16_hook(host, addr)) + return; + writew(val, host->ctl + (addr << host->pdata->bus_shift)); +} -#define STATUS_TO_TEXT(a) \ - do { \ - if (status & TMIO_STAT_##a) \ - printk(#a); \ - } while (0) +static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, + u16 *buf, int count) +{ + writesw(host->ctl + (addr << host->pdata->bus_shift), buf, count); +} -void pr_debug_status(u32 status) +static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) { - 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"); + writew(val, host->ctl + (addr << host->pdata->bus_shift)); + writew(val >> 16, host->ctl + ((addr + 2) << host->pdata->bus_shift)); } -#else -#define pr_debug_status(s) do { } while (0) + #endif |