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
  23 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
  24 #define TMIO_SDIO_STAT_IOIRQ    0x0001
  25 #define TMIO_SDIO_STAT_EXPUB52  0x4000
  26 #define TMIO_SDIO_STAT_EXWT     0x8000
  27 #define TMIO_SDIO_MASK_ALL      0xc007
  28
  29 /* Define some IRQ masks */
  30 /* This is the mask used at reset by the chip */
  31 #define TMIO_MASK_ALL           0x837f031d
  32 #define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
  33 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
  34 #define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
  35                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  36 #define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
  37
  38 struct tmio_mmc_data;
  39
  40 struct tmio_mmc_host {
  41         void __iomem *ctl;
  42         unsigned long bus_shift;
  43         struct mmc_command      *cmd;
  44         struct mmc_request      *mrq;
  45         struct mmc_data         *data;
  46         struct mmc_host         *mmc;
  47         int                     irq;
  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         /* 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         spinlock_t              lock;
  75         unsigned long           last_req_ts;
  76 };
  77
  78 int tmio_mmc_host_probe(struct tmio_mmc_host **host,
  79                         struct platform_device *pdev,
  80                         struct tmio_mmc_data *pdata);
  81 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
  82 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
  83
  84 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  85 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
  86
  87 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
  88                                          unsigned long *flags)
  89 {
  90         local_irq_save(*flags);
  91         return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
  92 }
  93
  94 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
  95                                           unsigned long *flags, void *virt)
  96 {
  97         kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
  98         local_irq_restore(*flags);
  99 }
 100
 101 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 102 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 103 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 104 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 105 #else
 106 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 107                                struct mmc_data *data)
 108 {
 109 }
 110
 111 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
 112                                  struct tmio_mmc_data *pdata)
 113 {
 114         host->chan_tx = NULL;
 115         host->chan_rx = NULL;
 116 }
 117
 118 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 119 {
 120 }
 121 #endif
 122
 123 #endif