drivers/ide/ide-h8300.c

   1 /*
   2  * H8/300 generic IDE interface
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/ide.h>
   7
   8 #include <asm/io.h>
   9 #include <asm/irq.h>
  10
  11 #define DRV_NAME "ide-h8300"
  12
  13 #define bswap(d) \
  14 ({                                      \
  15         u16 r;                          \
  16         __asm__("mov.b %w1,r1h\n\t"     \
  17                 "mov.b %x1,r1l\n\t"     \
  18                 "mov.w r1,%0"           \
  19                 :"=r"(r)                \
  20                 :"r"(d)                 \
  21                 :"er1");                \
  22         (r);                            \
  23 })
  24
  25 static void mm_outw(u16 d, unsigned long a)
  26 {
  27         __asm__("mov.b %w0,r2h\n\t"
  28                 "mov.b %x0,r2l\n\t"
  29                 "mov.w r2,@%1"
  30                 :
  31                 :"r"(d),"r"(a)
  32                 :"er2");
  33 }
  34
  35 static u16 mm_inw(unsigned long a)
  36 {
  37         register u16 r __asm__("er0");
  38         __asm__("mov.w @%1,r2\n\t"
  39                 "mov.b r2l,%x0\n\t"
  40                 "mov.b r2h,%w0"
  41                 :"=r"(r)
  42                 :"r"(a)
  43                 :"er2");
  44         return r;
  45 }
  46
  47 static void h8300_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
  48 {
  49         ide_hwif_t *hwif = drive->hwif;
  50         struct ide_io_ports *io_ports = &hwif->io_ports;
  51         struct ide_taskfile *tf = &cmd->tf;
  52         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  53
  54         if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  55                 HIHI = 0xFF;
  56
  57         if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
  58                 u8 data[2] = { tf->data, tf->hob_data };
  59
  60                 h8300_output_data(drive, cmd, data, 2);
  61         }
  62
  63         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  64                 outb(tf->hob_feature, io_ports->feature_addr);
  65         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  66                 outb(tf->hob_nsect, io_ports->nsect_addr);
  67         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  68                 outb(tf->hob_lbal, io_ports->lbal_addr);
  69         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  70                 outb(tf->hob_lbam, io_ports->lbam_addr);
  71         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  72                 outb(tf->hob_lbah, io_ports->lbah_addr);
  73
  74         if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
  75                 outb(tf->feature, io_ports->feature_addr);
  76         if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
  77                 outb(tf->nsect, io_ports->nsect_addr);
  78         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
  79                 outb(tf->lbal, io_ports->lbal_addr);
  80         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
  81                 outb(tf->lbam, io_ports->lbam_addr);
  82         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
  83                 outb(tf->lbah, io_ports->lbah_addr);
  84
  85         if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
  86                 outb((tf->device & HIHI) | drive->select,
  87                      io_ports->device_addr);
  88 }
  89
  90 static void h8300_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
  91 {
  92         ide_hwif_t *hwif = drive->hwif;
  93         struct ide_io_ports *io_ports = &hwif->io_ports;
  94         struct ide_taskfile *tf = &cmd->tf;
  95
  96         if (cmd->ftf_flags & IDE_FTFLAG_IN_DATA) {
  97                 u8 data[2];
  98
  99                 h8300_input_data(drive, cmd, data, 2);
 100
 101                 tf->data = data[0];
 102                 tf->hob_data = data[1];
 103         }
 104
 105         /* be sure we're looking at the low order bits */
 106         outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 107
 108         if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
 109                 tf->error  = inb(io_ports->feature_addr);
 110         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
 111                 tf->nsect  = inb(io_ports->nsect_addr);
 112         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
 113                 tf->lbal   = inb(io_ports->lbal_addr);
 114         if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
 115                 tf->lbam   = inb(io_ports->lbam_addr);
 116         if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
 117                 tf->lbah   = inb(io_ports->lbah_addr);
 118         if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
 119                 tf->device = inb(io_ports->device_addr);
 120
 121         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
 122                 outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 123
 124                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
 125                         tf->hob_error = inb(io_ports->feature_addr);
 126                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
 127                         tf->hob_nsect = inb(io_ports->nsect_addr);
 128                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
 129                         tf->hob_lbal  = inb(io_ports->lbal_addr);
 130                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
 131                         tf->hob_lbam  = inb(io_ports->lbam_addr);
 132                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
 133                         tf->hob_lbah  = inb(io_ports->lbah_addr);
 134         }
 135 }
 136
 137 static void mm_outsw(unsigned long addr, void *buf, u32 len)
 138 {
 139         unsigned short *bp = (unsigned short *)buf;
 140         for (; len > 0; len--, bp++)
 141                 *(volatile u16 *)addr = bswap(*bp);
 142 }
 143
 144 static void mm_insw(unsigned long addr, void *buf, u32 len)
 145 {
 146         unsigned short *bp = (unsigned short *)buf;
 147         for (; len > 0; len--, bp++)
 148                 *bp = bswap(*(volatile u16 *)addr);
 149 }
 150
 151 static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
 152                              void *buf, unsigned int len)
 153 {
 154         mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 155 }
 156
 157 static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
 158                               void *buf, unsigned int len)
 159 {
 160         mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 161 }
 162
 163 static const struct ide_tp_ops h8300_tp_ops = {
 164         .exec_command           = ide_exec_command,
 165         .read_status            = ide_read_status,
 166         .read_altstatus         = ide_read_altstatus,
 167         .write_devctl           = ide_write_devctl,
 168
 169         .tf_load                = h8300_tf_load,
 170         .tf_read                = h8300_tf_read,
 171
 172         .input_data             = h8300_input_data,
 173         .output_data            = h8300_output_data,
 174 };
 175
 176 #define H8300_IDE_GAP (2)
 177
 178 static inline void hw_setup(hw_regs_t *hw)
 179 {
 180         int i;
 181
 182         memset(hw, 0, sizeof(hw_regs_t));
 183         for (i = 0; i <= 7; i++)
 184                 hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
 185         hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
 186         hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
 187         hw->chipset = ide_generic;
 188 }
 189
 190 static const struct ide_port_info h8300_port_info = {
 191         .tp_ops                 = &h8300_tp_ops,
 192         .host_flags             = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
 193 };
 194
 195 static int __init h8300_ide_init(void)
 196 {
 197         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
 198
 199         printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
 200
 201         if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
 202                 goto out_busy;
 203         if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
 204                 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
 205                 goto out_busy;
 206         }
 207
 208         hw_setup(&hw);
 209
 210         return ide_host_add(&h8300_port_info, hws, NULL);
 211
 212 out_busy:
 213         printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
 214
 215         return -EBUSY;
 216 }
 217
 218 module_init(h8300_ide_init);
 219
 220 MODULE_LICENSE("GPL");