LXR linux/drivers/mmc/host/tmio

   1/*
   2 * linux/drivers/mmc/host/tmio_mmc.h
   3 *
   4 * Copyright (C) 2007 Ian Molton
   5 * Copyright (C) 2004 Ian Molton
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * Driver for the MMC / SD / SDIO cell found in:
  12 *
  13 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
  14 */
  15
  16#ifndef TMIO_MMC_H
  17#define TMIO_MMC_H
  18
  19#include <linux/highmem.h>
  20#include <linux/mmc/tmio.h>
  21#include <linux/mutex.h>
  22#include <linux/pagemap.h>
  23#include <linux/scatterlist.h>
  24#include <linux/spinlock.h>
  25
  26/* Definitions for values the CTRL_SDIO_STATUS register can take. */
  27#define TMIO_SDIO_STAT_IOIRQ    0x0001
  28#define TMIO_SDIO_STAT_EXPUB52  0x4000
  29#define TMIO_SDIO_STAT_EXWT     0x8000
  30#define TMIO_SDIO_MASK_ALL      0xc007
  31
  32/* Define some IRQ masks */
  33/* This is the mask used at reset by the chip */
  34#define TMIO_MASK_ALL           0x837f031d
  35#define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
  36#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
  37#define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
  38                TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  39#define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
  40
  41struct tmio_mmc_data;
  42
  43struct tmio_mmc_host {
  44        void __iomem *ctl;
  45        unsigned long bus_shift;
  46        struct mmc_command      *cmd;
  47        struct mmc_request      *mrq;
  48        struct mmc_data         *data;
  49        struct mmc_host         *mmc;
  50
  51        /* Controller power state */
  52        bool                    power;
  53
  54        /* Callbacks for clock / power control */
  55        void (*set_pwr)(struct platform_device *host, int state);
  56        void (*set_clk_div)(struct platform_device *host, int state);
  57
  58        /* pio related stuff */
  59        struct scatterlist      *sg_ptr;
  60        struct scatterlist      *sg_orig;
  61        unsigned int            sg_len;
  62        unsigned int            sg_off;
  63
  64        struct platform_device *pdev;
  65        struct tmio_mmc_data *pdata;
  66
  67        /* DMA support */
  68        bool                    force_pio;
  69        struct dma_chan         *chan_rx;
  70        struct dma_chan         *chan_tx;
  71        struct tasklet_struct   dma_complete;
  72        struct tasklet_struct   dma_issue;
  73        struct scatterlist      bounce_sg;
  74        u8                      *bounce_buf;
  75
  76        /* Track lost interrupts */
  77        struct delayed_work     delayed_reset_work;
  78        struct work_struct      done;
  79
  80        /* Cache IRQ mask */
  81        u32                     sdcard_irq_mask;
  82        u32                     sdio_irq_mask;
  83
  84        spinlock_t              lock;           /* protect host private data */
  85        unsigned long           last_req_ts;
  86        struct mutex            ios_lock;       /* protect set_ios() context */
  87        bool                    native_hotplug;
  88};
  89
  90int tmio_mmc_host_probe(struct tmio_mmc_host **host,
  91                        struct platform_device *pdev,
  92                        struct tmio_mmc_data *pdata);
  93void tmio_mmc_host_remove(struct tmio_mmc_host *host);
  94void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
  95
  96void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  97void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  98irqreturn_t tmio_mmc_irq(int irq, void *devid);
  99irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
 100irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
 101irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
 102
 103static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 104                                         unsigned long *flags)
 105{
 106        local_irq_save(*flags);
 107        return kmap_atomic(sg_page(sg)) + sg->offset;
 108}
 109
 110static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
 111                                          unsigned long *flags, void *virt)
 112{
 113        kunmap_atomic(virt - sg->offset);
 114        local_irq_restore(*flags);
 115}
 116
 117#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 118void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 119void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
 120void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 121void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 122void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
 123#else
 124static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 125                               struct mmc_data *data)
 126{
 127}
 128
 129static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 130{
 131}
 132
 133static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
 134                                 struct tmio_mmc_data *pdata)
 135{
 136        host->chan_tx = NULL;
 137        host->chan_rx = NULL;
 138}
 139
 140static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 141{
 142}
 143
 144static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 145{
 146}
 147#endif
 148
 149#ifdef CONFIG_PM
 150int tmio_mmc_host_suspend(struct device *dev);
 151int tmio_mmc_host_resume(struct device *dev);
 152#else
 153#define tmio_mmc_host_suspend NULL
 154#define tmio_mmc_host_resume NULL
 155#endif
 156
 157int tmio_mmc_host_runtime_suspend(struct device *dev);
 158int tmio_mmc_host_runtime_resume(struct device *dev);
 159
 160static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
 161{
 162        return readw(host->ctl + (addr << host->bus_shift));
 163}
 164
 165static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 166                u16 *buf, int count)
 167{
 168        readsw(host->ctl + (addr << host->bus_shift), buf, count);
 169}
 170
 171static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
 172{
 173        return readw(host->ctl + (addr << host->bus_shift)) |
 174               readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
 175}
 176
 177static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
 178{
 179        /* If there is a hook and it returns non-zero then there
 180         * is an error and the write should be skipped
 181         */
 182        if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr))
 183                return;
 184        writew(val, host->ctl + (addr << host->bus_shift));
 185}
 186
 187static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 188                u16 *buf, int count)
 189{
 190        writesw(host->ctl + (addr << host->bus_shift), buf, count);
 191}
 192
 193static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
 194{
 195        writew(val, host->ctl + (addr << host->bus_shift));
 196        writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 197}
 198
 199
 200#endif
 201