Merge branch 'upstream-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid
[linux-2.6] / drivers / ide / h8300 / ide-h8300.c
1 /*
2  * drivers/ide/h8300/ide-h8300.c
3  * H8/300 generic IDE interface
4  */
5
6 #include <linux/init.h>
7 #include <linux/ide.h>
8
9 #include <asm/io.h>
10 #include <asm/irq.h>
11
12 #define bswap(d) \
13 ({                                      \
14         u16 r;                          \
15         __asm__("mov.b %w1,r1h\n\t"     \
16                 "mov.b %x1,r1l\n\t"     \
17                 "mov.w r1,%0"           \
18                 :"=r"(r)                \
19                 :"r"(d)                 \
20                 :"er1");                \
21         (r);                            \
22 })
23
24 static void mm_outw(u16 d, unsigned long a)
25 {
26         __asm__("mov.b %w0,r2h\n\t"
27                 "mov.b %x0,r2l\n\t"
28                 "mov.w r2,@%1"
29                 :
30                 :"r"(d),"r"(a)
31                 :"er2");
32 }
33
34 static u16 mm_inw(unsigned long a)
35 {
36         register u16 r __asm__("er0");
37         __asm__("mov.w @%1,r2\n\t"
38                 "mov.b r2l,%x0\n\t"
39                 "mov.b r2h,%w0"
40                 :"=r"(r)
41                 :"r"(a)
42                 :"er2");
43         return r;
44 }
45
46 static void mm_outsw(unsigned long addr, void *buf, u32 len)
47 {
48         unsigned short *bp = (unsigned short *)buf;
49         for (; len > 0; len--, bp++)
50                 *(volatile u16 *)addr = bswap(*bp);
51 }
52
53 static void mm_insw(unsigned long addr, void *buf, u32 len)
54 {
55         unsigned short *bp = (unsigned short *)buf;
56         for (; len > 0; len--, bp++)
57                 *bp = bswap(*(volatile u16 *)addr);
58 }
59
60 #define H8300_IDE_GAP (2)
61
62 static inline void hw_setup(hw_regs_t *hw)
63 {
64         int i;
65
66         memset(hw, 0, sizeof(hw_regs_t));
67         for (i = 0; i <= IDE_STATUS_OFFSET; i++)
68                 hw->io_ports[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
69         hw->io_ports[IDE_CONTROL_OFFSET] = CONFIG_H8300_IDE_ALT;
70         hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
71         hw->dma = NO_DMA;
72         hw->chipset = ide_generic;
73 }
74
75 static inline void hwif_setup(ide_hwif_t *hwif)
76 {
77         default_hwif_iops(hwif);
78
79         hwif->mmio  = 1;
80         hwif->OUTW  = mm_outw;
81         hwif->OUTSW = mm_outsw;
82         hwif->INW   = mm_inw;
83         hwif->INSW  = mm_insw;
84         hwif->OUTSL = NULL;
85         hwif->INSL  = NULL;
86 }
87
88 void __init h8300_ide_init(void)
89 {
90         hw_regs_t hw;
91         ide_hwif_t *hwif;
92         int idx;
93
94         if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
95                 goto out_busy;
96         if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
97                 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
98                 goto out_busy;
99         }
100
101         hw_setup(&hw);
102
103         /* register if */
104         idx = ide_register_hw(&hw, 1, &hwif);
105         if (idx == -1) {
106                 printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
107                 return;
108         }
109
110         hwif_setup(hwif);
111         printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", idx);
112         return;
113
114 out_busy:
115         printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
116 }