drivers/staging/keucr/smscsi.c

   1 #include <linux/sched.h>
   2 #include <linux/errno.h>
   3 #include <linux/slab.h>
   4
   5 #include <scsi/scsi.h>
   6 #include <scsi/scsi_eh.h>
   7 #include <scsi/scsi_device.h>
   8
   9 #include "usb.h"
  10 #include "scsiglue.h"
  11 #include "transport.h"
  12 #include "smil.h"
  13
  14 static int SM_SCSI_Test_Unit_Ready(struct us_data *us, struct scsi_cmnd *srb);
  15 static int SM_SCSI_Inquiry(struct us_data *us, struct scsi_cmnd *srb);
  16 static int SM_SCSI_Mode_Sense(struct us_data *us, struct scsi_cmnd *srb);
  17 static int SM_SCSI_Read_Capacity(struct us_data *us, struct scsi_cmnd *srb);
  18 static int SM_SCSI_Read(struct us_data *us, struct scsi_cmnd *srb);
  19 static int SM_SCSI_Write(struct us_data *us, struct scsi_cmnd *srb);
  20
  21 /* ----- SM_SCSIIrp() -------------------------------------------------- */
  22 int SM_SCSIIrp(struct us_data *us, struct scsi_cmnd *srb)
  23 {
  24         int    result;
  25
  26         us->SrbStatus = SS_SUCCESS;
  27         switch (srb->cmnd[0]) {
  28         case TEST_UNIT_READY:
  29                 result = SM_SCSI_Test_Unit_Ready(us, srb);
  30                 break;          /* 0x00 */
  31         case INQUIRY:
  32                 result = SM_SCSI_Inquiry(us, srb);
  33                 break;          /* 0x12 */
  34         case MODE_SENSE:
  35                 result = SM_SCSI_Mode_Sense(us, srb);
  36                 break;          /* 0x1A */
  37         case READ_CAPACITY:
  38                 result = SM_SCSI_Read_Capacity(us, srb);
  39                 break;          /* 0x25 */
  40         case READ_10:
  41                 result = SM_SCSI_Read(us, srb);
  42                 break;          /* 0x28 */
  43         case WRITE_10:
  44                 result = SM_SCSI_Write(us, srb);
  45                 break;          /* 0x2A */
  46
  47         default:
  48                         us->SrbStatus = SS_ILLEGAL_REQUEST;
  49                         result = USB_STOR_TRANSPORT_FAILED;
  50                         break;
  51         }
  52         return result;
  53 }
  54
  55 /* ----- SM_SCSI_Test_Unit_Ready() ------------------------------------- */
  56 static int SM_SCSI_Test_Unit_Ready(struct us_data *us, struct scsi_cmnd *srb)
  57 {
  58         if (us->SM_Status.Insert && us->SM_Status.Ready)
  59                 return USB_STOR_TRANSPORT_GOOD;
  60         else {
  61                 ENE_SMInit(us);
  62                 return USB_STOR_TRANSPORT_GOOD;
  63         }
  64
  65         return USB_STOR_TRANSPORT_GOOD;
  66 }
  67
  68 /* ----- SM_SCSI_Inquiry() --------------------------------------------- */
  69 static int SM_SCSI_Inquiry(struct us_data *us, struct scsi_cmnd *srb)
  70 {
  71         u8 data_ptr[36] = {0x00, 0x80, 0x02, 0x00, 0x1F, 0x00, 0x00, 0x00,
  72                                  0x55, 0x53, 0x42, 0x32, 0x2E, 0x30, 0x20,
  73                                  0x20, 0x43, 0x61, 0x72, 0x64, 0x52, 0x65,
  74                                  0x61, 0x64, 0x65, 0x72, 0x20, 0x20, 0x20,
  75                                  0x20, 0x20, 0x20, 0x30, 0x31, 0x30, 0x30};
  76
  77         usb_stor_set_xfer_buf(us, data_ptr, 36, srb, TO_XFER_BUF);
  78         return USB_STOR_TRANSPORT_GOOD;
  79 }
  80
  81
  82 /* ----- SM_SCSI_Mode_Sense() ------------------------------------------ */
  83 static int SM_SCSI_Mode_Sense(struct us_data *us, struct scsi_cmnd *srb)
  84 {
  85         u8      mediaNoWP[12] = {0x0b, 0x00, 0x00, 0x08, 0x00, 0x00,
  86                                 0x71, 0xc0, 0x00, 0x00, 0x02, 0x00};
  87         u8      mediaWP[12]   = {0x0b, 0x00, 0x80, 0x08, 0x00, 0x00,
  88                                 0x71, 0xc0, 0x00, 0x00, 0x02, 0x00};
  89
  90         if (us->SM_Status.WtP)
  91                 usb_stor_set_xfer_buf(us, mediaWP, 12, srb, TO_XFER_BUF);
  92         else
  93                 usb_stor_set_xfer_buf(us, mediaNoWP, 12, srb, TO_XFER_BUF);
  94
  95
  96         return USB_STOR_TRANSPORT_GOOD;
  97 }
  98
  99 /* ----- SM_SCSI_Read_Capacity() --------------------------------------- */
 100 static int SM_SCSI_Read_Capacity(struct us_data *us, struct scsi_cmnd *srb)
 101 {
 102         unsigned int offset = 0;
 103         struct scatterlist *sg = NULL;
 104         u32   bl_num;
 105         u16    bl_len;
 106         u8    buf[8];
 107
 108         dev_dbg(&us->pusb_dev->dev, "SM_SCSI_Read_Capacity\n");
 109
 110         bl_len = 0x200;
 111         bl_num = Ssfdc.MaxLogBlocks * Ssfdc.MaxSectors * Ssfdc.MaxZones - 1;
 112
 113         us->bl_num = bl_num;
 114         dev_dbg(&us->pusb_dev->dev, "bl_len = %x\n", bl_len);
 115         dev_dbg(&us->pusb_dev->dev, "bl_num = %x\n", bl_num);
 116
 117         buf[0] = (bl_num >> 24) & 0xff;
 118         buf[1] = (bl_num >> 16) & 0xff;
 119         buf[2] = (bl_num >> 8) & 0xff;
 120         buf[3] = (bl_num >> 0) & 0xff;
 121         buf[4] = (bl_len >> 24) & 0xff;
 122         buf[5] = (bl_len >> 16) & 0xff;
 123         buf[6] = (bl_len >> 8) & 0xff;
 124         buf[7] = (bl_len >> 0) & 0xff;
 125
 126         usb_stor_access_xfer_buf(us, buf, 8, srb, &sg, &offset, TO_XFER_BUF);
 127
 128         return USB_STOR_TRANSPORT_GOOD;
 129 }
 130
 131 /* ----- SM_SCSI_Read() -------------------------------------------------- */
 132 static int SM_SCSI_Read(struct us_data *us, struct scsi_cmnd *srb)
 133 {
 134         int result = 0;
 135         u8 *Cdb = srb->cmnd;
 136         u32 bn  =  ((Cdb[2] << 24) & 0xff000000) |
 137                         ((Cdb[3] << 16) & 0x00ff0000) |
 138                         ((Cdb[4] << 8) & 0x0000ff00) |
 139                         ((Cdb[5] << 0) & 0x000000ff);
 140         u16  blen = ((Cdb[7] << 8) & 0xff00)     | ((Cdb[8] << 0) & 0x00ff);
 141         u32     blenByte = blen * 0x200;
 142         void    *buf;
 143
 144
 145         if (bn > us->bl_num)
 146                 return USB_STOR_TRANSPORT_ERROR;
 147
 148         buf = kmalloc(blenByte, GFP_KERNEL);
 149         if (buf == NULL)
 150                 return USB_STOR_TRANSPORT_ERROR;
 151         result = Media_D_ReadSector(us, bn, blen, buf);
 152         usb_stor_set_xfer_buf(us, buf, blenByte, srb, TO_XFER_BUF);
 153         kfree(buf);
 154
 155         if (!result)
 156                 return USB_STOR_TRANSPORT_GOOD;
 157         else
 158                 return USB_STOR_TRANSPORT_ERROR;
 159
 160         return USB_STOR_TRANSPORT_GOOD;
 161 }
 162
 163 /* ----- SM_SCSI_Write() -------------------------------------------------- */
 164 static int SM_SCSI_Write(struct us_data *us, struct scsi_cmnd *srb)
 165 {
 166         int result = 0;
 167         u8 *Cdb = srb->cmnd;
 168         u32 bn  =  ((Cdb[2] << 24) & 0xff000000) |
 169                         ((Cdb[3] << 16) & 0x00ff0000) |
 170                         ((Cdb[4] << 8) & 0x0000ff00) |
 171                         ((Cdb[5] << 0) & 0x000000ff);
 172         u16  blen = ((Cdb[7] << 8) & 0xff00)     | ((Cdb[8] << 0) & 0x00ff);
 173         u32     blenByte = blen * 0x200;
 174         void    *buf;
 175
 176
 177         if (bn > us->bl_num)
 178                 return USB_STOR_TRANSPORT_ERROR;
 179
 180         buf = kmalloc(blenByte, GFP_KERNEL);
 181         if (buf == NULL)
 182                 return USB_STOR_TRANSPORT_ERROR;
 183         usb_stor_set_xfer_buf(us, buf, blenByte, srb, FROM_XFER_BUF);
 184         result = Media_D_CopySector(us, bn, blen, buf);
 185         kfree(buf);
 186
 187         if (!result)
 188                 return USB_STOR_TRANSPORT_GOOD;
 189         else
 190                 return USB_STOR_TRANSPORT_ERROR;
 191
 192         return USB_STOR_TRANSPORT_GOOD;
 193 }
 194