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