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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 mm_outsw(unsigned long addr, void *buf, u32 len) |
| 26 | { |
| 27 | unsigned short *bp = (unsigned short *)buf; |
| 28 | for (; len > 0; len--, bp++) |
| 29 | *(volatile u16 *)addr = bswap(*bp); |
| 30 | } |
| 31 | |
| 32 | static void mm_insw(unsigned long addr, void *buf, u32 len) |
| 33 | { |
| 34 | unsigned short *bp = (unsigned short *)buf; |
| 35 | for (; len > 0; len--, bp++) |
| 36 | *bp = bswap(*(volatile u16 *)addr); |
| 37 | } |
| 38 | |
| 39 | static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd, |
| 40 | void *buf, unsigned int len) |
| 41 | { |
| 42 | mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); |
| 43 | } |
| 44 | |
| 45 | static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd, |
| 46 | void *buf, unsigned int len) |
| 47 | { |
| 48 | mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); |
| 49 | } |
| 50 | |
| 51 | static const struct ide_tp_ops h8300_tp_ops = { |
| 52 | .exec_command = ide_exec_command, |
| 53 | .read_status = ide_read_status, |
| 54 | .read_altstatus = ide_read_altstatus, |
| 55 | .write_devctl = ide_write_devctl, |
| 56 | |
| 57 | .dev_select = ide_dev_select, |
| 58 | .tf_load = ide_tf_load, |
| 59 | .tf_read = ide_tf_read, |
| 60 | |
| 61 | .input_data = h8300_input_data, |
| 62 | .output_data = h8300_output_data, |
| 63 | }; |
| 64 | |
| 65 | #define H8300_IDE_GAP (2) |
| 66 | |
| 67 | static inline void hw_setup(struct ide_hw *hw) |
| 68 | { |
| 69 | int i; |
| 70 | |
| 71 | memset(hw, 0, sizeof(*hw)); |
| 72 | for (i = 0; i <= 7; i++) |
| 73 | hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i; |
| 74 | hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT; |
| 75 | hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ; |
| 76 | } |
| 77 | |
| 78 | static const struct ide_port_info h8300_port_info = { |
| 79 | .tp_ops = &h8300_tp_ops, |
| 80 | .host_flags = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA, |
| 81 | .chipset = ide_generic, |
| 82 | }; |
| 83 | |
| 84 | static int __init h8300_ide_init(void) |
| 85 | { |
| 86 | struct ide_hw hw, *hws[] = { &hw }; |
| 87 | |
| 88 | printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n"); |
| 89 | |
| 90 | if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300")) |
| 91 | goto out_busy; |
| 92 | if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) { |
| 93 | release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8); |
| 94 | goto out_busy; |
| 95 | } |
| 96 | |
| 97 | hw_setup(&hw); |
| 98 | |
| 99 | return ide_host_add(&h8300_port_info, hws, 1, NULL); |
| 100 | |
| 101 | out_busy: |
| 102 | printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n"); |
| 103 | |
| 104 | return -EBUSY; |
| 105 | } |
| 106 | |
| 107 | module_init(h8300_ide_init); |
| 108 | |
| 109 | MODULE_LICENSE("GPL"); |
| 110 |
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