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Merge branch 'for-2.6.30' into for-2.6.31
[karo-tx-linux.git] / drivers / ide / ide-io-std.c
1
2 #include <linux/kernel.h>
3 #include <linux/ide.h>
4
5 #if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
6     defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
7 #include <asm/ide.h>
8 #else
9 #include <asm-generic/ide_iops.h>
10 #endif
11
12 /*
13  *      Conventional PIO operations for ATA devices
14  */
15
16 static u8 ide_inb(unsigned long port)
17 {
18         return (u8) inb(port);
19 }
20
21 static void ide_outb(u8 val, unsigned long port)
22 {
23         outb(val, port);
24 }
25
26 /*
27  *      MMIO operations, typically used for SATA controllers
28  */
29
30 static u8 ide_mm_inb(unsigned long port)
31 {
32         return (u8) readb((void __iomem *) port);
33 }
34
35 static void ide_mm_outb(u8 value, unsigned long port)
36 {
37         writeb(value, (void __iomem *) port);
38 }
39
40 void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
41 {
42         if (hwif->host_flags & IDE_HFLAG_MMIO)
43                 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
44         else
45                 outb(cmd, hwif->io_ports.command_addr);
46 }
47 EXPORT_SYMBOL_GPL(ide_exec_command);
48
49 u8 ide_read_status(ide_hwif_t *hwif)
50 {
51         if (hwif->host_flags & IDE_HFLAG_MMIO)
52                 return readb((void __iomem *)hwif->io_ports.status_addr);
53         else
54                 return inb(hwif->io_ports.status_addr);
55 }
56 EXPORT_SYMBOL_GPL(ide_read_status);
57
58 u8 ide_read_altstatus(ide_hwif_t *hwif)
59 {
60         if (hwif->host_flags & IDE_HFLAG_MMIO)
61                 return readb((void __iomem *)hwif->io_ports.ctl_addr);
62         else
63                 return inb(hwif->io_ports.ctl_addr);
64 }
65 EXPORT_SYMBOL_GPL(ide_read_altstatus);
66
67 void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
68 {
69         if (hwif->host_flags & IDE_HFLAG_MMIO)
70                 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
71         else
72                 outb(ctl, hwif->io_ports.ctl_addr);
73 }
74 EXPORT_SYMBOL_GPL(ide_write_devctl);
75
76 void ide_dev_select(ide_drive_t *drive)
77 {
78         ide_hwif_t *hwif = drive->hwif;
79         u8 select = drive->select | ATA_DEVICE_OBS;
80
81         if (hwif->host_flags & IDE_HFLAG_MMIO)
82                 writeb(select, (void __iomem *)hwif->io_ports.device_addr);
83         else
84                 outb(select, hwif->io_ports.device_addr);
85 }
86 EXPORT_SYMBOL_GPL(ide_dev_select);
87
88 void ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
89 {
90         ide_hwif_t *hwif = drive->hwif;
91         struct ide_io_ports *io_ports = &hwif->io_ports;
92         struct ide_taskfile *tf = &cmd->tf;
93         void (*tf_outb)(u8 addr, unsigned long port);
94         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
95         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
96
97         if (mmio)
98                 tf_outb = ide_mm_outb;
99         else
100                 tf_outb = ide_outb;
101
102         if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
103                 HIHI = 0xFF;
104
105         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
106                 tf_outb(tf->hob_feature, io_ports->feature_addr);
107         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
108                 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
109         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
110                 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
111         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
112                 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
113         if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
114                 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
115
116         if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
117                 tf_outb(tf->feature, io_ports->feature_addr);
118         if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
119                 tf_outb(tf->nsect, io_ports->nsect_addr);
120         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
121                 tf_outb(tf->lbal, io_ports->lbal_addr);
122         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
123                 tf_outb(tf->lbam, io_ports->lbam_addr);
124         if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
125                 tf_outb(tf->lbah, io_ports->lbah_addr);
126
127         if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
128                 tf_outb((tf->device & HIHI) | drive->select,
129                          io_ports->device_addr);
130 }
131 EXPORT_SYMBOL_GPL(ide_tf_load);
132
133 void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
134 {
135         ide_hwif_t *hwif = drive->hwif;
136         struct ide_io_ports *io_ports = &hwif->io_ports;
137         struct ide_taskfile *tf = &cmd->tf;
138         void (*tf_outb)(u8 addr, unsigned long port);
139         u8 (*tf_inb)(unsigned long port);
140         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
141
142         if (mmio) {
143                 tf_outb = ide_mm_outb;
144                 tf_inb  = ide_mm_inb;
145         } else {
146                 tf_outb = ide_outb;
147                 tf_inb  = ide_inb;
148         }
149
150         /* be sure we're looking at the low order bits */
151         tf_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
152
153         if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
154                 tf->error  = tf_inb(io_ports->feature_addr);
155         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
156                 tf->nsect  = tf_inb(io_ports->nsect_addr);
157         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
158                 tf->lbal   = tf_inb(io_ports->lbal_addr);
159         if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
160                 tf->lbam   = tf_inb(io_ports->lbam_addr);
161         if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
162                 tf->lbah   = tf_inb(io_ports->lbah_addr);
163         if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
164                 tf->device = tf_inb(io_ports->device_addr);
165
166         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
167                 tf_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
168
169                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
170                         tf->hob_error = tf_inb(io_ports->feature_addr);
171                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
172                         tf->hob_nsect = tf_inb(io_ports->nsect_addr);
173                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
174                         tf->hob_lbal  = tf_inb(io_ports->lbal_addr);
175                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
176                         tf->hob_lbam  = tf_inb(io_ports->lbam_addr);
177                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
178                         tf->hob_lbah  = tf_inb(io_ports->lbah_addr);
179         }
180 }
181 EXPORT_SYMBOL_GPL(ide_tf_read);
182
183 /*
184  * Some localbus EIDE interfaces require a special access sequence
185  * when using 32-bit I/O instructions to transfer data.  We call this
186  * the "vlb_sync" sequence, which consists of three successive reads
187  * of the sector count register location, with interrupts disabled
188  * to ensure that the reads all happen together.
189  */
190 static void ata_vlb_sync(unsigned long port)
191 {
192         (void)inb(port);
193         (void)inb(port);
194         (void)inb(port);
195 }
196
197 /*
198  * This is used for most PIO data transfers *from* the IDE interface
199  *
200  * These routines will round up any request for an odd number of bytes,
201  * so if an odd len is specified, be sure that there's at least one
202  * extra byte allocated for the buffer.
203  */
204 void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
205                     unsigned int len)
206 {
207         ide_hwif_t *hwif = drive->hwif;
208         struct ide_io_ports *io_ports = &hwif->io_ports;
209         unsigned long data_addr = io_ports->data_addr;
210         unsigned int words = (len + 1) >> 1;
211         u8 io_32bit = drive->io_32bit;
212         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
213
214         if (io_32bit) {
215                 unsigned long uninitialized_var(flags);
216
217                 if ((io_32bit & 2) && !mmio) {
218                         local_irq_save(flags);
219                         ata_vlb_sync(io_ports->nsect_addr);
220                 }
221
222                 words >>= 1;
223                 if (mmio)
224                         __ide_mm_insl((void __iomem *)data_addr, buf, words);
225                 else
226                         insl(data_addr, buf, words);
227
228                 if ((io_32bit & 2) && !mmio)
229                         local_irq_restore(flags);
230
231                 if (((len + 1) & 3) < 2)
232                         return;
233
234                 buf += len & ~3;
235                 words = 1;
236         }
237
238         if (mmio)
239                 __ide_mm_insw((void __iomem *)data_addr, buf, words);
240         else
241                 insw(data_addr, buf, words);
242 }
243 EXPORT_SYMBOL_GPL(ide_input_data);
244
245 /*
246  * This is used for most PIO data transfers *to* the IDE interface
247  */
248 void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
249                      unsigned int len)
250 {
251         ide_hwif_t *hwif = drive->hwif;
252         struct ide_io_ports *io_ports = &hwif->io_ports;
253         unsigned long data_addr = io_ports->data_addr;
254         unsigned int words = (len + 1) >> 1;
255         u8 io_32bit = drive->io_32bit;
256         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
257
258         if (io_32bit) {
259                 unsigned long uninitialized_var(flags);
260
261                 if ((io_32bit & 2) && !mmio) {
262                         local_irq_save(flags);
263                         ata_vlb_sync(io_ports->nsect_addr);
264                 }
265
266                 words >>= 1;
267                 if (mmio)
268                         __ide_mm_outsl((void __iomem *)data_addr, buf, words);
269                 else
270                         outsl(data_addr, buf, words);
271
272                 if ((io_32bit & 2) && !mmio)
273                         local_irq_restore(flags);
274
275                 if (((len + 1) & 3) < 2)
276                         return;
277
278                 buf += len & ~3;
279                 words = 1;
280         }
281
282         if (mmio)
283                 __ide_mm_outsw((void __iomem *)data_addr, buf, words);
284         else
285                 outsw(data_addr, buf, words);
286 }
287 EXPORT_SYMBOL_GPL(ide_output_data);
288
289 const struct ide_tp_ops default_tp_ops = {
290         .exec_command           = ide_exec_command,
291         .read_status            = ide_read_status,
292         .read_altstatus         = ide_read_altstatus,
293         .write_devctl           = ide_write_devctl,
294
295         .dev_select             = ide_dev_select,
296         .tf_load                = ide_tf_load,
297         .tf_read                = ide_tf_read,
298
299         .input_data             = ide_input_data,
300         .output_data            = ide_output_data,
301 };