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 bswap(d) \
  12 ({                                      \
  13         u16 r;                          \
  14         __asm__("mov.b %w1,r1h\n\t"     \
  15                 "mov.b %x1,r1l\n\t"     \
  16                 "mov.w r1,%0"           \
  17                 :"=r"(r)                \
  18                 :"r"(d)                 \
  19                 :"er1");                \
  20         (r);                            \
  21 })
  22
  23 static void mm_outw(u16 d, unsigned long a)
  24 {
  25         __asm__("mov.b %w0,r2h\n\t"
  26                 "mov.b %x0,r2l\n\t"
  27                 "mov.w r2,@%1"
  28                 :
  29                 :"r"(d),"r"(a)
  30                 :"er2");
  31 }
  32
  33 static u16 mm_inw(unsigned long a)
  34 {
  35         register u16 r __asm__("er0");
  36         __asm__("mov.w @%1,r2\n\t"
  37                 "mov.b r2l,%x0\n\t"
  38                 "mov.b r2h,%w0"
  39                 :"=r"(r)
  40                 :"r"(a)
  41                 :"er2");
  42         return r;
  43 }
  44
  45 static void h8300_tf_load(ide_drive_t *drive, ide_task_t *task)
  46 {
  47         ide_hwif_t *hwif = drive->hwif;
  48         struct ide_io_ports *io_ports = &hwif->io_ports;
  49         struct ide_taskfile *tf = &task->tf;
  50         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  51
  52         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  53                 HIHI = 0xFF;
  54
  55         ide_set_irq(drive, 1);
  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(drive->ctl & ~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(drive->ctl | 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 int __init h8300_ide_init(void)
 182 {
 183         hw_regs_t hw;
 184         ide_hwif_t *hwif;
 185         int index;
 186         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 187
 188         if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
 189                 goto out_busy;
 190         if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
 191                 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
 192                 goto out_busy;
 193         }
 194
 195         hw_setup(&hw);
 196
 197         hwif = ide_find_port();
 198         if (hwif == NULL) {
 199                 printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
 200                 return -ENOENT;
 201         }
 202
 203         index = hwif->index;
 204         ide_init_port_data(hwif, index);
 205         ide_init_port_hw(hwif, &hw);
 206         hwif_setup(hwif);
 207         hwif->host_flags = IDE_HFLAG_NO_IO_32BIT;
 208         printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", index);
 209
 210         idx[0] = index;
 211
 212         ide_device_add(idx, NULL);
 213
 214         return 0;
 215
 216 out_busy:
 217         printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
 218
 219         return -EBUSY;
 220 }
 221
 222 module_init(h8300_ide_init);
 223
 224 MODULE_LICENSE("GPL");