drivers/ide/ide-io-std.c

   1
   2 #include <linux/kernel.h>
   3 #include <linux/ide.h>
   4
   5 #if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
   6     defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
   7 #include <asm/ide.h>
   8 #else
   9 #include <asm-generic/ide_iops.h>
  10 #endif
  11
  12 /*
  13  *      Conventional PIO operations for ATA devices
  14  */
  15
  16 static u8 ide_inb(unsigned long port)
  17 {
  18         return (u8) inb(port);
  19 }
  20
  21 static void ide_outb(u8 val, unsigned long port)
  22 {
  23         outb(val, port);
  24 }
  25
  26 /*
  27  *      MMIO operations, typically used for SATA controllers
  28  */
  29
  30 static u8 ide_mm_inb(unsigned long port)
  31 {
  32         return (u8) readb((void __iomem *) port);
  33 }
  34
  35 static void ide_mm_outb(u8 value, unsigned long port)
  36 {
  37         writeb(value, (void __iomem *) port);
  38 }
  39
  40 void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
  41 {
  42         if (hwif->host_flags & IDE_HFLAG_MMIO)
  43                 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
  44         else
  45                 outb(cmd, hwif->io_ports.command_addr);
  46 }
  47 EXPORT_SYMBOL_GPL(ide_exec_command);
  48
  49 u8 ide_read_status(ide_hwif_t *hwif)
  50 {
  51         if (hwif->host_flags & IDE_HFLAG_MMIO)
  52                 return readb((void __iomem *)hwif->io_ports.status_addr);
  53         else
  54                 return inb(hwif->io_ports.status_addr);
  55 }
  56 EXPORT_SYMBOL_GPL(ide_read_status);
  57
  58 u8 ide_read_altstatus(ide_hwif_t *hwif)
  59 {
  60         if (hwif->host_flags & IDE_HFLAG_MMIO)
  61                 return readb((void __iomem *)hwif->io_ports.ctl_addr);
  62         else
  63                 return inb(hwif->io_ports.ctl_addr);
  64 }
  65 EXPORT_SYMBOL_GPL(ide_read_altstatus);
  66
  67 void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
  68 {
  69         if (hwif->host_flags & IDE_HFLAG_MMIO)
  70                 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
  71         else
  72                 outb(ctl, hwif->io_ports.ctl_addr);
  73 }
  74 EXPORT_SYMBOL_GPL(ide_write_devctl);
  75
  76 void ide_dev_select(ide_drive_t *drive)
  77 {
  78         ide_hwif_t *hwif = drive->hwif;
  79         u8 select = drive->select | ATA_DEVICE_OBS;
  80
  81         if (hwif->host_flags & IDE_HFLAG_MMIO)
  82                 writeb(select, (void __iomem *)hwif->io_ports.device_addr);
  83         else
  84                 outb(select, hwif->io_ports.device_addr);
  85 }
  86 EXPORT_SYMBOL_GPL(ide_dev_select);
  87
  88 void ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
  89 {
  90         ide_hwif_t *hwif = drive->hwif;
  91         struct ide_io_ports *io_ports = &hwif->io_ports;
  92         struct ide_taskfile *tf = &cmd->tf;
  93         void (*tf_outb)(u8 addr, unsigned long port);
  94         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
  95         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  96
  97         if (mmio)
  98                 tf_outb = ide_mm_outb;
  99         else
 100                 tf_outb = ide_outb;
 101
 102         if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
 103                 HIHI = 0xFF;
 104
 105         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
 106                 tf_outb(tf->hob_feature, io_ports->feature_addr);
 107         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
 108                 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
 109         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
 110                 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
 111         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
 112                 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
 113         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
 114                 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
 115
 116         if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
 117                 tf_outb(tf->feature, io_ports->feature_addr);
 118         if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
 119                 tf_outb(tf->nsect, io_ports->nsect_addr);
 120         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
 121                 tf_outb(tf->lbal, io_ports->lbal_addr);
 122         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
 123                 tf_outb(tf->lbam, io_ports->lbam_addr);
 124         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
 125                 tf_outb(tf->lbah, io_ports->lbah_addr);
 126
 127         if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
 128                 tf_outb((tf->device & HIHI) | drive->select,
 129                          io_ports->device_addr);
 130 }
 131 EXPORT_SYMBOL_GPL(ide_tf_load);
 132
 133 void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
 134 {
 135         ide_hwif_t *hwif = drive->hwif;
 136         struct ide_io_ports *io_ports = &hwif->io_ports;
 137         struct ide_taskfile *tf = &cmd->tf;
 138         void (*tf_outb)(u8 addr, unsigned long port);
 139         u8 (*tf_inb)(unsigned long port);
 140         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 141
 142         if (mmio) {
 143                 tf_outb = ide_mm_outb;
 144                 tf_inb  = ide_mm_inb;
 145         } else {
 146                 tf_outb = ide_outb;
 147                 tf_inb  = ide_inb;
 148         }
 149
 150         /* be sure we're looking at the low order bits */
 151         tf_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 152
 153         if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
 154                 tf->error  = tf_inb(io_ports->feature_addr);
 155         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
 156                 tf->nsect  = tf_inb(io_ports->nsect_addr);
 157         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
 158                 tf->lbal   = tf_inb(io_ports->lbal_addr);
 159         if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
 160                 tf->lbam   = tf_inb(io_ports->lbam_addr);
 161         if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
 162                 tf->lbah   = tf_inb(io_ports->lbah_addr);
 163         if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
 164                 tf->device = tf_inb(io_ports->device_addr);
 165
 166         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
 167                 tf_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 168
 169                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
 170                         tf->hob_error = tf_inb(io_ports->feature_addr);
 171                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
 172                         tf->hob_nsect = tf_inb(io_ports->nsect_addr);
 173                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
 174                         tf->hob_lbal  = tf_inb(io_ports->lbal_addr);
 175                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
 176                         tf->hob_lbam  = tf_inb(io_ports->lbam_addr);
 177                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
 178                         tf->hob_lbah  = tf_inb(io_ports->lbah_addr);
 179         }
 180 }
 181 EXPORT_SYMBOL_GPL(ide_tf_read);
 182
 183 /*
 184  * Some localbus EIDE interfaces require a special access sequence
 185  * when using 32-bit I/O instructions to transfer data.  We call this
 186  * the "vlb_sync" sequence, which consists of three successive reads
 187  * of the sector count register location, with interrupts disabled
 188  * to ensure that the reads all happen together.
 189  */
 190 static void ata_vlb_sync(unsigned long port)
 191 {
 192         (void)inb(port);
 193         (void)inb(port);
 194         (void)inb(port);
 195 }
 196
 197 /*
 198  * This is used for most PIO data transfers *from* the IDE interface
 199  *
 200  * These routines will round up any request for an odd number of bytes,
 201  * so if an odd len is specified, be sure that there's at least one
 202  * extra byte allocated for the buffer.
 203  */
 204 void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
 205                     unsigned int len)
 206 {
 207         ide_hwif_t *hwif = drive->hwif;
 208         struct ide_io_ports *io_ports = &hwif->io_ports;
 209         unsigned long data_addr = io_ports->data_addr;
 210         unsigned int words = (len + 1) >> 1;
 211         u8 io_32bit = drive->io_32bit;
 212         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 213
 214         if (io_32bit) {
 215                 unsigned long uninitialized_var(flags);
 216
 217                 if ((io_32bit & 2) && !mmio) {
 218                         local_irq_save(flags);
 219                         ata_vlb_sync(io_ports->nsect_addr);
 220                 }
 221
 222                 words >>= 1;
 223                 if (mmio)
 224                         __ide_mm_insl((void __iomem *)data_addr, buf, words);
 225                 else
 226                         insl(data_addr, buf, words);
 227
 228                 if ((io_32bit & 2) && !mmio)
 229                         local_irq_restore(flags);
 230
 231                 if (((len + 1) & 3) < 2)
 232                         return;
 233
 234                 buf += len & ~3;
 235                 words = 1;
 236         }
 237
 238         if (mmio)
 239                 __ide_mm_insw((void __iomem *)data_addr, buf, words);
 240         else
 241                 insw(data_addr, buf, words);
 242 }
 243 EXPORT_SYMBOL_GPL(ide_input_data);
 244
 245 /*
 246  * This is used for most PIO data transfers *to* the IDE interface
 247  */
 248 void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
 249                      unsigned int len)
 250 {
 251         ide_hwif_t *hwif = drive->hwif;
 252         struct ide_io_ports *io_ports = &hwif->io_ports;
 253         unsigned long data_addr = io_ports->data_addr;
 254         unsigned int words = (len + 1) >> 1;
 255         u8 io_32bit = drive->io_32bit;
 256         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 257
 258         if (io_32bit) {
 259                 unsigned long uninitialized_var(flags);
 260
 261                 if ((io_32bit & 2) && !mmio) {
 262                         local_irq_save(flags);
 263                         ata_vlb_sync(io_ports->nsect_addr);
 264                 }
 265
 266                 words >>= 1;
 267                 if (mmio)
 268                         __ide_mm_outsl((void __iomem *)data_addr, buf, words);
 269                 else
 270                         outsl(data_addr, buf, words);
 271
 272                 if ((io_32bit & 2) && !mmio)
 273                         local_irq_restore(flags);
 274
 275                 if (((len + 1) & 3) < 2)
 276                         return;
 277
 278                 buf += len & ~3;
 279                 words = 1;
 280         }
 281
 282         if (mmio)
 283                 __ide_mm_outsw((void __iomem *)data_addr, buf, words);
 284         else
 285                 outsw(data_addr, buf, words);
 286 }
 287 EXPORT_SYMBOL_GPL(ide_output_data);
 288
 289 const struct ide_tp_ops default_tp_ops = {
 290         .exec_command           = ide_exec_command,
 291         .read_status            = ide_read_status,
 292         .read_altstatus         = ide_read_altstatus,
 293         .write_devctl           = ide_write_devctl,
 294
 295         .dev_select             = ide_dev_select,
 296         .tf_load                = ide_tf_load,
 297         .tf_read                = ide_tf_read,
 298
 299         .input_data             = ide_input_data,
 300         .output_data            = ide_output_data,
 301 };