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/dmaengine.h>
  20 #include <linux/highmem.h>
  21 #include <linux/mmc/tmio.h>
  22 #include <linux/mutex.h>
  23 #include <linux/pagemap.h>
  24 #include <linux/scatterlist.h>
  25 #include <linux/spinlock.h>
  26
  27 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
  28 #define TMIO_SDIO_STAT_IOIRQ    0x0001
  29 #define TMIO_SDIO_STAT_EXPUB52  0x4000
  30 #define TMIO_SDIO_STAT_EXWT     0x8000
  31 #define TMIO_SDIO_MASK_ALL      0xc007
  32
  33 /* Define some IRQ masks */
  34 /* This is the mask used at reset by the chip */
  35 #define TMIO_MASK_ALL           0x837f031d
  36 #define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
  37 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
  38 #define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
  39                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  40 #define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
  41
  42 struct tmio_mmc_data;
  43 struct tmio_mmc_host;
  44
  45 struct tmio_mmc_dma {
  46         void *chan_priv_tx;
  47         void *chan_priv_rx;
  48         int slave_id_tx;
  49         int slave_id_rx;
  50         enum dma_slave_buswidth dma_buswidth;
  51         bool (*filter)(struct dma_chan *chan, void *arg);
  52         void (*enable)(struct tmio_mmc_host *host, bool enable);
  53 };
  54
  55 struct tmio_mmc_host {
  56         void __iomem *ctl;
  57         struct mmc_command      *cmd;
  58         struct mmc_request      *mrq;
  59         struct mmc_data         *data;
  60         struct mmc_host         *mmc;
  61
  62         /* Callbacks for clock / power control */
  63         void (*set_pwr)(struct platform_device *host, int state);
  64         void (*set_clk_div)(struct platform_device *host, int state);
  65
  66         /* pio related stuff */
  67         struct scatterlist      *sg_ptr;
  68         struct scatterlist      *sg_orig;
  69         unsigned int            sg_len;
  70         unsigned int            sg_off;
  71         unsigned long           bus_shift;
  72
  73         struct platform_device *pdev;
  74         struct tmio_mmc_data *pdata;
  75         struct tmio_mmc_dma     *dma;
  76
  77         /* DMA support */
  78         bool                    force_pio;
  79         struct dma_chan         *chan_rx;
  80         struct dma_chan         *chan_tx;
  81         struct tasklet_struct   dma_complete;
  82         struct tasklet_struct   dma_issue;
  83         struct scatterlist      bounce_sg;
  84         u8                      *bounce_buf;
  85
  86         /* Track lost interrupts */
  87         struct delayed_work     delayed_reset_work;
  88         struct work_struct      done;
  89
  90         /* Cache */
  91         u32                     sdcard_irq_mask;
  92         u32                     sdio_irq_mask;
  93         unsigned int            clk_cache;
  94
  95         spinlock_t              lock;           /* protect host private data */
  96         unsigned long           last_req_ts;
  97         struct mutex            ios_lock;       /* protect set_ios() context */
  98         bool                    native_hotplug;
  99         bool                    sdio_irq_enabled;
 100
 101         int (*write16_hook)(struct tmio_mmc_host *host, int addr);
 102         int (*clk_enable)(struct platform_device *pdev, unsigned int *f);
 103         void (*clk_disable)(struct platform_device *pdev);
 104         int (*multi_io_quirk)(struct mmc_card *card,
 105                               unsigned int direction, int blk_size);
 106 };
 107
 108 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
 109 void tmio_mmc_host_free(struct tmio_mmc_host *host);
 110 int tmio_mmc_host_probe(struct tmio_mmc_host *host,
 111                         struct tmio_mmc_data *pdata);
 112 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
 113 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
 114
 115 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 116 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 117 irqreturn_t tmio_mmc_irq(int irq, void *devid);
 118 irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
 119 irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
 120 irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
 121
 122 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 123                                          unsigned long *flags)
 124 {
 125         local_irq_save(*flags);
 126         return kmap_atomic(sg_page(sg)) + sg->offset;
 127 }
 128
 129 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
 130                                           unsigned long *flags, void *virt)
 131 {
 132         kunmap_atomic(virt - sg->offset);
 133         local_irq_restore(*flags);
 134 }
 135
 136 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 137 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 138 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
 139 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 140 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 141 void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
 142 #else
 143 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 144                                struct mmc_data *data)
 145 {
 146 }
 147
 148 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 149 {
 150 }
 151
 152 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
 153                                  struct tmio_mmc_data *pdata)
 154 {
 155         host->chan_tx = NULL;
 156         host->chan_rx = NULL;
 157 }
 158
 159 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 160 {
 161 }
 162
 163 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 164 {
 165 }
 166 #endif
 167
 168 #ifdef CONFIG_PM
 169 int tmio_mmc_host_runtime_suspend(struct device *dev);
 170 int tmio_mmc_host_runtime_resume(struct device *dev);
 171 #endif
 172
 173 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
 174 {
 175         return readw(host->ctl + (addr << host->bus_shift));
 176 }
 177
 178 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 179                 u16 *buf, int count)
 180 {
 181         readsw(host->ctl + (addr << host->bus_shift), buf, count);
 182 }
 183
 184 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
 185 {
 186         return readw(host->ctl + (addr << host->bus_shift)) |
 187                readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
 188 }
 189
 190 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
 191 {
 192         /* If there is a hook and it returns non-zero then there
 193          * is an error and the write should be skipped
 194          */
 195         if (host->write16_hook && host->write16_hook(host, addr))
 196                 return;
 197         writew(val, host->ctl + (addr << host->bus_shift));
 198 }
 199
 200 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 201                 u16 *buf, int count)
 202 {
 203         writesw(host->ctl + (addr << host->bus_shift), buf, count);
 204 }
 205
 206 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
 207 {
 208         writew(val, host->ctl + (addr << host->bus_shift));
 209         writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 210 }
 211
 212
 213 #endif