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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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