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/pagemap.h>
  22 #include <linux/spinlock.h>
  23
  24 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
  25 #define TMIO_SDIO_STAT_IOIRQ    0x0001
  26 #define TMIO_SDIO_STAT_EXPUB52  0x4000
  27 #define TMIO_SDIO_STAT_EXWT     0x8000
  28 #define TMIO_SDIO_MASK_ALL      0xc007
  29
  30 /* Define some IRQ masks */
  31 /* This is the mask used at reset by the chip */
  32 #define TMIO_MASK_ALL           0x837f031d
  33 #define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
  34 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
  35 #define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
  36                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  37 #define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
  38
  39 struct tmio_mmc_data;
  40
  41 struct tmio_mmc_host {
  42         void __iomem *ctl;
  43         unsigned long bus_shift;
  44         struct mmc_command      *cmd;
  45         struct mmc_request      *mrq;
  46         struct mmc_data         *data;
  47         struct mmc_host         *mmc;
  48         unsigned int            sdio_irq_enabled;
  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         int                     pm_error;
  55
  56         /* pio related stuff */
  57         struct scatterlist      *sg_ptr;
  58         struct scatterlist      *sg_orig;
  59         unsigned int            sg_len;
  60         unsigned int            sg_off;
  61
  62         struct platform_device *pdev;
  63         struct tmio_mmc_data *pdata;
  64
  65         /* DMA support */
  66         bool                    force_pio;
  67         struct dma_chan         *chan_rx;
  68         struct dma_chan         *chan_tx;
  69         struct tasklet_struct   dma_complete;
  70         struct tasklet_struct   dma_issue;
  71         struct scatterlist      bounce_sg;
  72         u8                      *bounce_buf;
  73
  74         /* Track lost interrupts */
  75         struct delayed_work     delayed_reset_work;
  76         spinlock_t              lock;
  77         unsigned long           last_req_ts;
  78 };
  79
  80 int tmio_mmc_host_probe(struct tmio_mmc_host **host,
  81                         struct platform_device *pdev,
  82                         struct tmio_mmc_data *pdata);
  83 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
  84 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
  85
  86 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  87 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  88 irqreturn_t tmio_mmc_irq(int irq, void *devid);
  89
  90 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
  91                                          unsigned long *flags)
  92 {
  93         local_irq_save(*flags);
  94         return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
  95 }
  96
  97 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
  98                                           unsigned long *flags, void *virt)
  99 {
 100         kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
 101         local_irq_restore(*flags);
 102 }
 103
 104 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 105 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 106 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 107 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 108 #else
 109 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 110                                struct mmc_data *data)
 111 {
 112 }
 113
 114 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
 115                                  struct tmio_mmc_data *pdata)
 116 {
 117         host->chan_tx = NULL;
 118         host->chan_rx = NULL;
 119 }
 120
 121 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 122 {
 123 }
 124 #endif
 125
 126 #ifdef CONFIG_PM
 127 int tmio_mmc_host_suspend(struct device *dev);
 128 int tmio_mmc_host_resume(struct device *dev);
 129 #else
 130 #define tmio_mmc_host_suspend NULL
 131 #define tmio_mmc_host_resume NULL
 132 #endif
 133
 134 int tmio_mmc_host_runtime_suspend(struct device *dev);
 135 int tmio_mmc_host_runtime_resume(struct device *dev);
 136
 137 #endif