drivers/mmc/host/tmio_mmc.h

   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
  41 struct tmio_mmc_data;
  42
  43 struct tmio_mmc_host {
  44         void __iomem *ctl;
  45         struct mmc_command      *cmd;
  46         struct mmc_request      *mrq;
  47         struct mmc_data         *data;
  48         struct mmc_host         *mmc;
  49
  50         /* Callbacks for clock / power control */
  51         void (*set_pwr)(struct platform_device *host, int state);
  52         void (*set_clk_div)(struct platform_device *host, int state);
  53
  54         /* pio related stuff */
  55         struct scatterlist      *sg_ptr;
  56         struct scatterlist      *sg_orig;
  57         unsigned int            sg_len;
  58         unsigned int            sg_off;
  59
  60         struct platform_device *pdev;
  61         struct tmio_mmc_data *pdata;
  62
  63         /* DMA support */
  64         bool                    force_pio;
  65         struct dma_chan         *chan_rx;
  66         struct dma_chan         *chan_tx;
  67         struct tasklet_struct   dma_complete;
  68         struct tasklet_struct   dma_issue;
  69         struct scatterlist      bounce_sg;
  70         u8                      *bounce_buf;
  71
  72         /* Track lost interrupts */
  73         struct delayed_work     delayed_reset_work;
  74         struct work_struct      done;
  75
  76         /* Cache */
  77         u32                     sdcard_irq_mask;
  78         u32                     sdio_irq_mask;
  79         unsigned int            clk_cache;
  80
  81         spinlock_t              lock;           /* protect host private data */
  82         unsigned long           last_req_ts;
  83         struct mutex            ios_lock;       /* protect set_ios() context */
  84         bool                    native_hotplug;
  85         bool                    sdio_irq_enabled;
  86 };
  87
  88 int tmio_mmc_host_probe(struct tmio_mmc_host **host,
  89                         struct platform_device *pdev,
  90                         struct tmio_mmc_data *pdata);
  91 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
  92 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
  93
  94 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  95 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  96 irqreturn_t tmio_mmc_irq(int irq, void *devid);
  97 irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
  98 irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
  99 irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
 100
 101 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 102                                          unsigned long *flags)
 103 {
 104         local_irq_save(*flags);
 105         return kmap_atomic(sg_page(sg)) + sg->offset;
 106 }
 107
 108 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
 109                                           unsigned long *flags, void *virt)
 110 {
 111         kunmap_atomic(virt - sg->offset);
 112         local_irq_restore(*flags);
 113 }
 114
 115 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 116 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 117 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
 118 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 119 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 120 void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
 121 #else
 122 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 123                                struct mmc_data *data)
 124 {
 125 }
 126
 127 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 128 {
 129 }
 130
 131 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
 132                                  struct tmio_mmc_data *pdata)
 133 {
 134         host->chan_tx = NULL;
 135         host->chan_rx = NULL;
 136 }
 137
 138 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 139 {
 140 }
 141
 142 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 143 {
 144 }
 145 #endif
 146
 147 #ifdef CONFIG_PM
 148 int tmio_mmc_host_runtime_suspend(struct device *dev);
 149 int tmio_mmc_host_runtime_resume(struct device *dev);
 150 #endif
 151
 152 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
 153 {
 154         return readw(host->ctl + (addr << host->pdata->bus_shift));
 155 }
 156
 157 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 158                 u16 *buf, int count)
 159 {
 160         readsw(host->ctl + (addr << host->pdata->bus_shift), buf, count);
 161 }
 162
 163 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
 164 {
 165         return readw(host->ctl + (addr << host->pdata->bus_shift)) |
 166                readw(host->ctl + ((addr + 2) << host->pdata->bus_shift)) << 16;
 167 }
 168
 169 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
 170 {
 171         /* If there is a hook and it returns non-zero then there
 172          * is an error and the write should be skipped
 173          */
 174         if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr))
 175                 return;
 176         writew(val, host->ctl + (addr << host->pdata->bus_shift));
 177 }
 178
 179 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 180                 u16 *buf, int count)
 181 {
 182         writesw(host->ctl + (addr << host->pdata->bus_shift), buf, count);
 183 }
 184
 185 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
 186 {
 187         writew(val, host->ctl + (addr << host->pdata->bus_shift));
 188         writew(val >> 16, host->ctl + ((addr + 2) << host->pdata->bus_shift));
 189 }
 190
 191
 192 #endif