ide: move data register access out of tf_{read|load}() methods (take 2)
[linux-3.10.git] / drivers / ide / ide-h8300.c
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_outw(u16 d, unsigned long a)
26 {
27         __asm__("mov.b %w0,r2h\n\t"
28                 "mov.b %x0,r2l\n\t"
29                 "mov.w r2,@%1"
30                 :
31                 :"r"(d),"r"(a)
32                 :"er2");
33 }
34
35 static u16 mm_inw(unsigned long a)
36 {
37         register u16 r __asm__("er0");
38         __asm__("mov.w @%1,r2\n\t"
39                 "mov.b r2l,%x0\n\t"
40                 "mov.b r2h,%w0"
41                 :"=r"(r)
42                 :"r"(a)
43                 :"er2");
44         return r;
45 }
46
47 static void h8300_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
48 {
49         ide_hwif_t *hwif = drive->hwif;
50         struct ide_io_ports *io_ports = &hwif->io_ports;
51         struct ide_taskfile *tf = &cmd->tf;
52         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
53
54         if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
55                 HIHI = 0xFF;
56
57         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
58                 outb(tf->hob_feature, io_ports->feature_addr);
59         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
60                 outb(tf->hob_nsect, io_ports->nsect_addr);
61         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
62                 outb(tf->hob_lbal, io_ports->lbal_addr);
63         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
64                 outb(tf->hob_lbam, io_ports->lbam_addr);
65         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
66                 outb(tf->hob_lbah, io_ports->lbah_addr);
67
68         if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
69                 outb(tf->feature, io_ports->feature_addr);
70         if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
71                 outb(tf->nsect, io_ports->nsect_addr);
72         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
73                 outb(tf->lbal, io_ports->lbal_addr);
74         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
75                 outb(tf->lbam, io_ports->lbam_addr);
76         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
77                 outb(tf->lbah, io_ports->lbah_addr);
78
79         if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
80                 outb((tf->device & HIHI) | drive->select,
81                      io_ports->device_addr);
82 }
83
84 static void h8300_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
85 {
86         ide_hwif_t *hwif = drive->hwif;
87         struct ide_io_ports *io_ports = &hwif->io_ports;
88         struct ide_taskfile *tf = &cmd->tf;
89
90         /* be sure we're looking at the low order bits */
91         outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
92
93         if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
94                 tf->error  = inb(io_ports->feature_addr);
95         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
96                 tf->nsect  = inb(io_ports->nsect_addr);
97         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
98                 tf->lbal   = inb(io_ports->lbal_addr);
99         if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
100                 tf->lbam   = inb(io_ports->lbam_addr);
101         if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
102                 tf->lbah   = inb(io_ports->lbah_addr);
103         if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
104                 tf->device = inb(io_ports->device_addr);
105
106         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
107                 outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
108
109                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
110                         tf->hob_error = inb(io_ports->feature_addr);
111                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
112                         tf->hob_nsect = inb(io_ports->nsect_addr);
113                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
114                         tf->hob_lbal  = inb(io_ports->lbal_addr);
115                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
116                         tf->hob_lbam  = inb(io_ports->lbam_addr);
117                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
118                         tf->hob_lbah  = inb(io_ports->lbah_addr);
119         }
120 }
121
122 static void mm_outsw(unsigned long addr, void *buf, u32 len)
123 {
124         unsigned short *bp = (unsigned short *)buf;
125         for (; len > 0; len--, bp++)
126                 *(volatile u16 *)addr = bswap(*bp);
127 }
128
129 static void mm_insw(unsigned long addr, void *buf, u32 len)
130 {
131         unsigned short *bp = (unsigned short *)buf;
132         for (; len > 0; len--, bp++)
133                 *bp = bswap(*(volatile u16 *)addr);
134 }
135
136 static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
137                              void *buf, unsigned int len)
138 {
139         mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
140 }
141
142 static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
143                               void *buf, unsigned int len)
144 {
145         mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
146 }
147
148 static const struct ide_tp_ops h8300_tp_ops = {
149         .exec_command           = ide_exec_command,
150         .read_status            = ide_read_status,
151         .read_altstatus         = ide_read_altstatus,
152         .write_devctl           = ide_write_devctl,
153
154         .tf_load                = h8300_tf_load,
155         .tf_read                = h8300_tf_read,
156
157         .input_data             = h8300_input_data,
158         .output_data            = h8300_output_data,
159 };
160
161 #define H8300_IDE_GAP (2)
162
163 static inline void hw_setup(hw_regs_t *hw)
164 {
165         int i;
166
167         memset(hw, 0, sizeof(hw_regs_t));
168         for (i = 0; i <= 7; i++)
169                 hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
170         hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
171         hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
172         hw->chipset = ide_generic;
173 }
174
175 static const struct ide_port_info h8300_port_info = {
176         .tp_ops                 = &h8300_tp_ops,
177         .host_flags             = IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_NO_DMA,
178 };
179
180 static int __init h8300_ide_init(void)
181 {
182         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
183
184         printk(KERN_INFO DRV_NAME ": H8/300 generic IDE interface\n");
185
186         if (!request_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8, "ide-h8300"))
187                 goto out_busy;
188         if (!request_region(CONFIG_H8300_IDE_ALT, H8300_IDE_GAP, "ide-h8300")) {
189                 release_region(CONFIG_H8300_IDE_BASE, H8300_IDE_GAP*8);
190                 goto out_busy;
191         }
192
193         hw_setup(&hw);
194
195         return ide_host_add(&h8300_port_info, hws, NULL);
196
197 out_busy:
198         printk(KERN_ERR "ide-h8300: IDE I/F resource already used.\n");
199
200         return -EBUSY;
201 }
202
203 module_init(h8300_ide_init);
204
205 MODULE_LICENSE("GPL");