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
mm_outsw(unsigned long addr,void * buf,u32 len)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
mm_insw(unsigned long addr,void * buf,u32 len)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
h8300_input_data(ide_drive_t * drive,struct ide_cmd * cmd,void * buf,unsigned int len)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
h8300_output_data(ide_drive_t * drive,struct ide_cmd * cmd,void * buf,unsigned int len)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
hw_setup(struct ide_hw * hw)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
h8300_ide_init(void)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