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         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
  90 int tmio_mmc_host_probe(struct tmio_mmc_host **host,
  91                         struct platform_device *pdev,
  92                         struct tmio_mmc_data *pdata);
  93 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
  94 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
  95
  96 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  97 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  98 irqreturn_t tmio_mmc_irq(int irq, void *devid);
  99 irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
 100 irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
 101 irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
 102
 103 static 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
 110 static 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)
 118 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 119 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
 120 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 121 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 122 void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
 123 #else
 124 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 125                                struct mmc_data *data)
 126 {
 127 }
 128
 129 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 130 {
 131 }
 132
 133 static 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
 140 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 141 {
 142 }
 143
 144 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 145 {
 146 }
 147 #endif
 148
 149 #ifdef CONFIG_PM
 150 int tmio_mmc_host_suspend(struct device *dev);
 151 int 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
 157 int tmio_mmc_host_runtime_suspend(struct device *dev);
 158 int tmio_mmc_host_runtime_resume(struct device *dev);
 159
 160 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
 161 {
 162         return readw(host->ctl + (addr << host->bus_shift));
 163 }
 164
 165 static 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
 171 static 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
 177 static 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
 187 static 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
 193 static 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