target/linux/rb532/files/drivers/block/rb500/ata.h

   1 /* CF-mips driver
   2    This is a block driver for the direct (mmaped) interface to the CF-slot,
   3    found in Routerboard.com's RB532 board
   4    See SDK provided from routerboard.com.
   5
   6    Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
   7    Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
   8
   9    This work is redistributed under the terms of the GNU General Public License.
  10 */
  11
  12 #ifndef __CFMIPS_ATA_H__
  13 #define __CFMIPS_ATA_H__
  14
  15 #include <linux/interrupt.h>
  16
  17 #define CFG_DC_DEV1     (void*)0xb8010010
  18 #define   CFG_DC_DEVBASE        0x0
  19 #define   CFG_DC_DEVMASK        0x4
  20 #define   CFG_DC_DEVC           0x8
  21 #define   CFG_DC_DEVTC          0xC
  22
  23 #define CFDEV_BUF_SIZE  0x1000
  24 #define ATA_CIS_OFFSET  0x200
  25 #define ATA_REG_OFFSET  0x800
  26 #define ATA_DBUF_OFFSET 0xC00
  27
  28 #define ATA_REG_FEAT    0x1
  29 #define ATA_REG_SC      0x2
  30 #define ATA_REG_SN      0x3
  31 #define ATA_REG_CL      0x4
  32 #define ATA_REG_CH      0x5
  33 #define ATA_REG_DH      0x6
  34 #define   ATA_REG_DH_BASE       0xa0
  35 #define   ATA_REG_DH_LBA        0x40
  36 #define   ATA_REG_DH_DRV        0x10
  37 #define ATA_REG_CMD     0x7
  38 #define ATA_REG_ST      0x7
  39 #define   ATA_REG_ST_BUSY       0x80
  40 #define   ATA_REG_ST_RDY        0x40
  41 #define   ATA_REG_ST_DWF        0x20
  42 #define   ATA_REG_ST_DSC        0x10
  43 #define   ATA_REG_ST_DRQ        0x08
  44 #define   ATA_REG_ST_CORR       0x04
  45 #define   ATA_REG_ST_ERR        0x01
  46 #define ATA_REG_ERR     0xd
  47 #define ATA_REG_DC      0xe
  48 #define   ATA_REG_DC_IEN        0x02
  49 #define   ATA_REG_DC_SRST       0x04
  50
  51 #define ATA_CMD_READ_SECTORS    0x20
  52 #define ATA_CMD_WRITE_SECTORS   0x30
  53 #define ATA_CMD_EXEC_DRIVE_DIAG 0x90
  54 #define ATA_CMD_READ_MULTIPLE   0xC4
  55 #define ATA_CMD_WRITE_MULTIPLE  0xC5
  56 #define ATA_CMD_SET_MULTIPLE    0xC6
  57 #define ATA_CMD_IDENTIFY_DRIVE  0xEC
  58 #define ATA_CMD_SET_FEATURES    0xEF
  59
  60 #define ATA_FEATURE_ENABLE_APM  0x05
  61 #define ATA_FEATURE_DISABLE_APM 0x85
  62 #define ATA_APM_DISABLED        0x00
  63 #define ATA_APM_MIN_POWER       0x01
  64 #define ATA_APM_WITH_STANDBY    0x7f
  65 #define ATA_APM_WITHOUT_STANDBY 0x80
  66 #define ATA_APM_MAX_PERFORMANCE 0xfe
  67
  68 #define CF_SECT_SIZE    0x200
  69 /* That is the ratio CF_SECT_SIZE/512 (the kernel sector size) */
  70 #define CF_KERNEL_MUL   1
  71 #define ATA_MAX_SECT_PER_CMD    0x100
  72
  73 #define CF_TRANS_FAILED         0
  74 #define CF_TRANS_OK             1
  75 #define CF_TRANS_IN_PROGRESS    2
  76
  77
  78 enum trans_state {
  79         TS_IDLE = 0,
  80         TS_AFTER_RESET,
  81         TS_READY,
  82         TS_CMD,
  83         TS_TRANS
  84 };
  85
  86 //
  87 // #if DEBUG
  88 // static unsigned long busy_time;
  89 // #endif
  90
  91 /** Struct to hold the cfdev
  92 Actually, all the data here only has one instance. However, for
  93 reasons of programming conformity, it is passed around as a pointer
  94 */
  95 struct cf_mips_dev {
  96         void *base; /* base address for I/O */
  97         void *baddr; /* remapped address */
  98
  99         int pin; /* gpio pin */
 100         int irq; /* gpio irq */
 101
 102         unsigned head;
 103         unsigned cyl;
 104         unsigned spt;
 105         unsigned sectors;
 106
 107         unsigned short block_size;
 108         unsigned dtype ; // ATA or CF
 109         struct request_queue *queue;
 110         struct gendisk  *gd;
 111
 112         /* Transaction state */
 113         enum trans_state tstate;
 114         char *tbuf;
 115         unsigned long tbuf_size;
 116         sector_t tsect_start;
 117         unsigned tsector_count;
 118         unsigned tsectors_left;
 119         int tread;
 120         unsigned tcmd;
 121         int async_mode;
 122         unsigned long irq_enable_time;
 123
 124         struct request *active_req; /* A request is being carried out. Is that different from tstate? */
 125         int users;
 126         struct timer_list to_timer;
 127         struct tasklet_struct tasklet;
 128
 129         /** This lock ensures that the requests to this device are all done
 130         atomically. Transfers can run in parallel, requests are all queued
 131         one-by-one */
 132         spinlock_t lock;
 133 };
 134
 135 int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect,
 136         char* buffer, int is_write);
 137 int cf_init(struct cf_mips_dev* dev);
 138 void cf_cleanup(struct cf_mips_dev* dev);
 139
 140 void cf_async_trans_done(struct cf_mips_dev* dev, int result);
 141 // void *cf_get_next_buf(unsigned long *buf_size);
 142
 143 #endif