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