drivers/ide/h8300/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, ide_task_t *task)
  48 {
  49         ide_hwif_t *hwif = drive->hwif;
  50         struct ide_io_ports *io_ports = &hwif->io_ports;
  51         struct ide_taskfile *tf = &task->tf;
  52         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  53
  54         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  55                 HIHI = 0xFF;
  56
  57         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  58                 mm_outw((tf->hob_data << 8) | tf->data, io_ports->data_addr);
  59
  60         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  61                 outb(tf->hob_feature, io_ports->feature_addr);
  62         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  63                 outb(tf->hob_nsect, io_ports->nsect_addr);
  64         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  65                 outb(tf->hob_lbal, io_ports->lbal_addr);
  66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  67                 outb(tf->hob_lbam, io_ports->lbam_addr);
  68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  69                 outb(tf->hob_lbah, io_ports->lbah_addr);
  70
  71         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  72                 outb(tf->feature, io_ports->feature_addr);
  73         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  74                 outb(tf->nsect, io_ports->nsect_addr);
  75         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
  76                 outb(tf->lbal, io_ports->lbal_addr);
  77         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
  78                 outb(tf->lbam, io_ports->lbam_addr);
  79         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
  80                 outb(tf->lbah, io_ports->lbah_addr);
  81
  82         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
  83                 outb((tf->device & HIHI) | drive->select.all,
  84                      io_ports->device_addr);
  85 }
  86
  87 static void h8300_tf_read(ide_drive_t *drive, ide_task_t *task)
  88 {
  89         ide_hwif_t *hwif = drive->hwif;
  90         struct ide_io_ports *io_ports = &hwif->io_ports;
  91         struct ide_taskfile *tf = &task->tf;
  92
  93         if (task->tf_flags & IDE_TFLAG_IN_DATA) {
  94                 u16 data = mm_inw(io_ports->data_addr);
  95
  96                 tf->data = data & 0xff;
  97                 tf->hob_data = (data >> 8) & 0xff;
  98         }
  99
 100         /* be sure we're looking at the low order bits */
 101         outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
 102
 103         if (task->tf_flags & IDE_TFLAG_IN_NSECT)
 104                 tf->nsect  = inb(io_ports->nsect_addr);
 105         if (task->tf_flags & IDE_TFLAG_IN_LBAL)
 106                 tf->lbal   = inb(io_ports->lbal_addr);
 107         if (task->tf_flags & IDE_TFLAG_IN_LBAM)
 108                 tf->lbam   = inb(io_ports->lbam_addr);
 109         if (task->tf_flags & IDE_TFLAG_IN_LBAH)
 110                 tf->lbah   = inb(io_ports->lbah_addr);
 111         if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
 112                 tf->device = inb(io_ports->device_addr);
 113
 114         if (task->tf_flags & IDE_TFLAG_LBA48) {
 115                 outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
 116
 117                 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
 118                         tf->hob_feature = inb(io_ports->feature_addr);
 119                 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
 120                         tf->hob_nsect   = inb(io_ports->nsect_addr);
 121                 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
 122                         tf->hob_lbal    = inb(io_ports->lbal_addr);
 123                 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
 124                         tf->hob_lbam    = inb(io_ports->lbam_addr);
 125                 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
 126                         tf->hob_lbah    = inb(io_ports->lbah_addr);
 127         }
 128 }
 129
 130 static void mm_outsw(unsigned long addr, void *buf, u32 len)
 131 {
 132         unsigned short *bp = (unsigned short *)buf;
 133         for (; len > 0; len--, bp++)
 134                 *(volatile u16 *)addr = bswap(*bp);
 135 }
 136
 137 static void mm_insw(unsigned long addr, void *buf, u32 len)
 138 {
 139         unsigned short *bp = (unsigned short *)buf;
 140         for (; len > 0; len--, bp++)
 141                 *bp = bswap(*(volatile u16 *)addr);
 142 }
 143
 144 static void h8300_input_data(ide_drive_t *drive, struct request *rq,
 145                              void *buf, unsigned int len)
 146 {
 147         mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 148 }
 149
 150 static void h8300_output_data(ide_drive_t *drive, struct request *rq,
 151                               void *buf, unsigned int len)
 152 {
 153         mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
 154 }
 155
 156 #define H8300_IDE_GAP (2)
 157
 158 static inline void hw_setup(hw_regs_t *hw)
 159 {
 160         int i;
 161
 162         memset(hw, 0, sizeof(hw_regs_t));
 163         for (i = 0; i <= 7; i++)
 164                 hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
 165         hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
 166         hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
 167         hw->chipset = ide_generic;
 168 }
 169
 170 static inline void hwif_setup(ide_hwif_t *hwif)
 171 {
 172         default_hwif_iops(hwif);
 173
 174         hwif->tf_load = h8300_tf_load;
 175         hwif->tf_read = h8300_tf_read;
 176
 177         hwif->input_data  = h8300_input_data;
 178         hwif->output_data = h8300_output_data;
 179 }
 180
 181 static const struct ide_port_info h8300_port_info = {
 182         .host_flags             = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
 183 };
 184
 185 static int __init h8300_ide_init(void)
 186 {
 187         hw_regs_t hw;
 188         ide_hwif_t *hwif;
 189         int index;
 190         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 191
 192         printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
 193
 194         if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
 195                 goto out_busy;
 196         if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
 197                 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
 198                 goto out_busy;
 199         }
 200
 201         hw_setup(&hw);
 202
 203         hwif = ide_find_port_slot(&h8300_port_info);
 204         if (hwif == NULL)
 205                 return -ENOENT;
 206
 207         index = hwif->index;
 208         ide_init_port_hw(hwif, &hw);
 209         hwif_setup(hwif);
 210
 211         idx[0] = index;
 212
 213         ide_device_add(idx, &h8300_port_info);
 214
 215         return 0;
 216
 217 out_busy:
 218         printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
 219
 220         return -EBUSY;
 221 }
 222
 223 module_init(h8300_ide_init);
 224
 225 MODULE_LICENSE("GPL");