blob: 9fa78e98d1ba8a280c0c095204aabd46f0e3ab8e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Uwe Zeisbergerf30c2262006-10-03 23:01:26 +02002 * drivers/ide/h8300/ide-h8300.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * H8/300 generic IDE interface
4 */
5
6#include <linux/init.h>
7#include <linux/ide.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
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
24static 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
34static 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
46static 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
53static 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
62static 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 hw->chipset = ide_generic;
72}
73
74static inline void hwif_setup(ide_hwif_t *hwif)
75{
76 default_hwif_iops(hwif);
77
Bartlomiej Zolnierkiewicz2ad1e552007-02-17 02:40:25 +010078 hwif->mmio = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 hwif->OUTW = mm_outw;
80 hwif->OUTSW = mm_outsw;
81 hwif->INW = mm_inw;
82 hwif->INSW = mm_insw;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 hwif->OUTSL = NULL;
84 hwif->INSL = NULL;
85}
86
87void __init h8300_ide_init(void)
88{
89 hw_regs_t hw;
90 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +010091 int index;
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +010092 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
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 */
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100104 hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
105 if (hwif == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 printk(KERN_ERR "ide-h8300: IDE I/F register failed\n");
107 return;
108 }
109
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100110 index = hwif->index;
111 ide_init_port_data(hwif, index);
112 ide_init_port_hw(hwif, &hw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 hwif_setup(hwif);
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100114 printk(KERN_INFO "ide%d: H8/300 generic IDE interface\n", index);
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100115
116 idx[0] = index;
117
118 ide_device_add(idx);
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 return;
121
122out_busy:
123 printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
124}