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 valid = cmd->valid.out.hob;
  95         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
  96         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  97
  98         if (mmio)
  99                 tf_outb = ide_mm_outb;
 100         else
 101                 tf_outb = ide_outb;
 102
 103         if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
 104                 HIHI = 0xFF;
 105
 106         if (valid & IDE_VALID_FEATURE)
 107                 tf_outb(tf->hob_feature, io_ports->feature_addr);
 108         if (valid & IDE_VALID_NSECT)
 109                 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
 110         if (valid & IDE_VALID_LBAL)
 111                 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
 112         if (valid & IDE_VALID_LBAM)
 113                 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
 114         if (valid & IDE_VALID_LBAH)
 115                 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
 116
 117         valid = cmd->valid.out.tf;
 118
 119         if (valid & IDE_VALID_FEATURE)
 120                 tf_outb(tf->feature, io_ports->feature_addr);
 121         if (valid & IDE_VALID_NSECT)
 122                 tf_outb(tf->nsect, io_ports->nsect_addr);
 123         if (valid & IDE_VALID_LBAL)
 124                 tf_outb(tf->lbal, io_ports->lbal_addr);
 125         if (valid & IDE_VALID_LBAM)
 126                 tf_outb(tf->lbam, io_ports->lbam_addr);
 127         if (valid & IDE_VALID_LBAH)
 128                 tf_outb(tf->lbah, io_ports->lbah_addr);
 129
 130         if (valid & IDE_VALID_DEVICE)
 131                 tf_outb((tf->device & HIHI) | drive->select,
 132                          io_ports->device_addr);
 133 }
 134 EXPORT_SYMBOL_GPL(ide_tf_load);
 135
 136 void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
 137 {
 138         ide_hwif_t *hwif = drive->hwif;
 139         struct ide_io_ports *io_ports = &hwif->io_ports;
 140         struct ide_taskfile *tf = &cmd->tf;
 141         void (*tf_outb)(u8 addr, unsigned long port);
 142         u8 (*tf_inb)(unsigned long port);
 143         u8 valid = cmd->valid.in.tf;
 144         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 145
 146         if (mmio) {
 147                 tf_outb = ide_mm_outb;
 148                 tf_inb  = ide_mm_inb;
 149         } else {
 150                 tf_outb = ide_outb;
 151                 tf_inb  = ide_inb;
 152         }
 153
 154         /* be sure we're looking at the low order bits */
 155         tf_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 156
 157         if (valid & IDE_VALID_ERROR)
 158                 tf->error  = tf_inb(io_ports->feature_addr);
 159         if (valid & IDE_VALID_NSECT)
 160                 tf->nsect  = tf_inb(io_ports->nsect_addr);
 161         if (valid & IDE_VALID_LBAL)
 162                 tf->lbal   = tf_inb(io_ports->lbal_addr);
 163         if (valid & IDE_VALID_LBAM)
 164                 tf->lbam   = tf_inb(io_ports->lbam_addr);
 165         if (valid & IDE_VALID_LBAH)
 166                 tf->lbah   = tf_inb(io_ports->lbah_addr);
 167         if (valid & IDE_VALID_DEVICE)
 168                 tf->device = tf_inb(io_ports->device_addr);
 169
 170         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
 171                 tf_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 172
 173                 valid = cmd->valid.in.hob;
 174
 175                 if (valid & IDE_VALID_ERROR)
 176                         tf->hob_error = tf_inb(io_ports->feature_addr);
 177                 if (valid & IDE_VALID_NSECT)
 178                         tf->hob_nsect = tf_inb(io_ports->nsect_addr);
 179                 if (valid & IDE_VALID_LBAL)
 180                         tf->hob_lbal  = tf_inb(io_ports->lbal_addr);
 181                 if (valid & IDE_VALID_LBAM)
 182                         tf->hob_lbam  = tf_inb(io_ports->lbam_addr);
 183                 if (valid & IDE_VALID_LBAH)
 184                         tf->hob_lbah  = tf_inb(io_ports->lbah_addr);
 185         }
 186 }
 187 EXPORT_SYMBOL_GPL(ide_tf_read);
 188
 189 /*
 190  * Some localbus EIDE interfaces require a special access sequence
 191  * when using 32-bit I/O instructions to transfer data.  We call this
 192  * the "vlb_sync" sequence, which consists of three successive reads
 193  * of the sector count register location, with interrupts disabled
 194  * to ensure that the reads all happen together.
 195  */
 196 static void ata_vlb_sync(unsigned long port)
 197 {
 198         (void)inb(port);
 199         (void)inb(port);
 200         (void)inb(port);
 201 }
 202
 203 /*
 204  * This is used for most PIO data transfers *from* the IDE interface
 205  *
 206  * These routines will round up any request for an odd number of bytes,
 207  * so if an odd len is specified, be sure that there's at least one
 208  * extra byte allocated for the buffer.
 209  */
 210 void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
 211                     unsigned int len)
 212 {
 213         ide_hwif_t *hwif = drive->hwif;
 214         struct ide_io_ports *io_ports = &hwif->io_ports;
 215         unsigned long data_addr = io_ports->data_addr;
 216         unsigned int words = (len + 1) >> 1;
 217         u8 io_32bit = drive->io_32bit;
 218         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 219
 220         if (io_32bit) {
 221                 unsigned long uninitialized_var(flags);
 222
 223                 if ((io_32bit & 2) && !mmio) {
 224                         local_irq_save(flags);
 225                         ata_vlb_sync(io_ports->nsect_addr);
 226                 }
 227
 228                 words >>= 1;
 229                 if (mmio)
 230                         __ide_mm_insl((void __iomem *)data_addr, buf, words);
 231                 else
 232                         insl(data_addr, buf, words);
 233
 234                 if ((io_32bit & 2) && !mmio)
 235                         local_irq_restore(flags);
 236
 237                 if (((len + 1) & 3) < 2)
 238                         return;
 239
 240                 buf += len & ~3;
 241                 words = 1;
 242         }
 243
 244         if (mmio)
 245                 __ide_mm_insw((void __iomem *)data_addr, buf, words);
 246         else
 247                 insw(data_addr, buf, words);
 248 }
 249 EXPORT_SYMBOL_GPL(ide_input_data);
 250
 251 /*
 252  * This is used for most PIO data transfers *to* the IDE interface
 253  */
 254 void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
 255                      unsigned int len)
 256 {
 257         ide_hwif_t *hwif = drive->hwif;
 258         struct ide_io_ports *io_ports = &hwif->io_ports;
 259         unsigned long data_addr = io_ports->data_addr;
 260         unsigned int words = (len + 1) >> 1;
 261         u8 io_32bit = drive->io_32bit;
 262         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 263
 264         if (io_32bit) {
 265                 unsigned long uninitialized_var(flags);
 266
 267                 if ((io_32bit & 2) && !mmio) {
 268                         local_irq_save(flags);
 269                         ata_vlb_sync(io_ports->nsect_addr);
 270                 }
 271
 272                 words >>= 1;
 273                 if (mmio)
 274                         __ide_mm_outsl((void __iomem *)data_addr, buf, words);
 275                 else
 276                         outsl(data_addr, buf, words);
 277
 278                 if ((io_32bit & 2) && !mmio)
 279                         local_irq_restore(flags);
 280
 281                 if (((len + 1) & 3) < 2)
 282                         return;
 283
 284                 buf += len & ~3;
 285                 words = 1;
 286         }
 287
 288         if (mmio)
 289                 __ide_mm_outsw((void __iomem *)data_addr, buf, words);
 290         else
 291                 outsw(data_addr, buf, words);
 292 }
 293 EXPORT_SYMBOL_GPL(ide_output_data);
 294
 295 const struct ide_tp_ops default_tp_ops = {
 296         .exec_command           = ide_exec_command,
 297         .read_status            = ide_read_status,
 298         .read_altstatus         = ide_read_altstatus,
 299         .write_devctl           = ide_write_devctl,
 300
 301         .dev_select             = ide_dev_select,
 302         .tf_load                = ide_tf_load,
 303         .tf_read                = ide_tf_read,
 304
 305         .input_data             = ide_input_data,
 306         .output_data            = ide_output_data,
 307 };