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   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 h8300_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
  26 {
  27         ide_hwif_t *hwif = drive->hwif;
  28         struct ide_io_ports *io_ports = &hwif->io_ports;
  29         struct ide_taskfile *tf = &cmd->tf;
  30         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  31
  32         if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  33                 HIHI = 0xFF;
  34
  35         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  36                 outb(tf->hob_feature, io_ports->feature_addr);
  37         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  38                 outb(tf->hob_nsect, io_ports->nsect_addr);
  39         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  40                 outb(tf->hob_lbal, io_ports->lbal_addr);
  41         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  42                 outb(tf->hob_lbam, io_ports->lbam_addr);
  43         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  44                 outb(tf->hob_lbah, io_ports->lbah_addr);
  45
  46         if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
  47                 outb(tf->feature, io_ports->feature_addr);
  48         if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
  49                 outb(tf->nsect, io_ports->nsect_addr);
  50         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
  51                 outb(tf->lbal, io_ports->lbal_addr);
  52         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
  53                 outb(tf->lbam, io_ports->lbam_addr);
  54         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
  55                 outb(tf->lbah, io_ports->lbah_addr);
  56
  57         if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
  58                 outb((tf->device & HIHI) | drive->select,
  59                      io_ports->device_addr);
  60 }
  61
  62 static void h8300_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
  63 {
  64         ide_hwif_t *hwif = drive->hwif;
  65         struct ide_io_ports *io_ports = &hwif->io_ports;
  66         struct ide_taskfile *tf = &cmd->tf;
  67
  68         /* be sure we're looking at the low order bits */
  69         outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
  70
  71         if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
  72                 tf->error  = inb(io_ports->feature_addr);
  73         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
  74                 tf->nsect  = inb(io_ports->nsect_addr);
  75         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
  76                 tf->lbal   = inb(io_ports->lbal_addr);
  77         if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
  78                 tf->lbam   = inb(io_ports->lbam_addr);
  79         if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
  80                 tf->lbah   = inb(io_ports->lbah_addr);
  81         if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
  82                 tf->device = inb(io_ports->device_addr);
  83
  84         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  85                 outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
  86
  87                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
  88                         tf->hob_error = inb(io_ports->feature_addr);
  89                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
  90                         tf->hob_nsect = inb(io_ports->nsect_addr);
  91                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
  92                         tf->hob_lbal  = inb(io_ports->lbal_addr);
  93                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
  94                         tf->hob_lbam  = inb(io_ports->lbam_addr);
  95                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
  96                         tf->hob_lbah  = inb(io_ports->lbah_addr);
  97         }
  98 }
  99
 100 static void mm_outsw(unsigned long addr, void *buf, u32 len)
 101 {
 102         unsigned short *bp = (unsigned short *)buf;
 103         for (; len > 0; len--, bp++)
 104                 *(volatile u16 *)addr = bswap(*bp);
 105 }
 106
 107 static void mm_insw(unsigned long addr, void *buf, u32 len)
 108 {
 109         unsigned short *bp = (unsigned short *)buf;
 110         for (; len > 0; len--, bp++)
 111                 *bp = bswap(*(volatile u16 *)addr);
 112 }
 113
 114 static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
 115                              void *buf, unsigned int len)
 116 {
 117         mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 118 }
 119
 120 static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
 121                               void *buf, unsigned int len)
 122 {
 123         mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 124 }
 125
 126 static const struct ide_tp_ops h8300_tp_ops = {
 127         .exec_command           = ide_exec_command,
 128         .read_status            = ide_read_status,
 129         .read_altstatus         = ide_read_altstatus,
 130         .write_devctl           = ide_write_devctl,
 131
 132         .dev_select             = ide_dev_select,
 133         .tf_load                = h8300_tf_load,
 134         .tf_read                = h8300_tf_read,
 135
 136         .input_data             = h8300_input_data,
 137         .output_data            = h8300_output_data,
 138 };
 139
 140 #define H8300_IDE_GAP (2)
 141
 142 static inline void hw_setup(hw_regs_t *hw)
 143 {
 144         int i;
 145
 146         memset(hw, 0, sizeof(hw_regs_t));
 147         for (i = 0; i <= 7; i++)
 148                 hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
 149         hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
 150         hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
 151         hw->chipset = ide_generic;
 152 }
 153
 154 static const struct ide_port_info h8300_port_info = {
 155         .tp_ops                 = &h8300_tp_ops,
 156         .host_flags             = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
 157 };
 158
 159 static int __init h8300_ide_init(void)
 160 {
 161         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
 162
 163         printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
 164
 165         if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
 166                 goto out_busy;
 167         if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
 168                 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
 169                 goto out_busy;
 170         }
 171
 172         hw_setup(&hw);
 173
 174         return ide_host_add(&h8300_port_info, hws, NULL);
 175
 176 out_busy:
 177         printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
 178
 179         return -EBUSY;
 180 }
 181
 182 module_init(h8300_ide_init);
 183
 184 MODULE_LICENSE("GPL");