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1574cf6c BZ |
1 | |
2 | #include <linux/kernel.h> | |
3 | #include <linux/ide.h> | |
4 | ||
15a453a9 BZ |
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 | ||
1574cf6c BZ |
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 | ||
ecf3a31d | 67 | void ide_write_devctl(ide_hwif_t *hwif, u8 ctl) |
1574cf6c | 68 | { |
1574cf6c BZ |
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 | } | |
ecf3a31d | 74 | EXPORT_SYMBOL_GPL(ide_write_devctl); |
1574cf6c | 75 | |
22aa4b32 | 76 | void ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd) |
1574cf6c BZ |
77 | { |
78 | ide_hwif_t *hwif = drive->hwif; | |
79 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
22aa4b32 | 80 | struct ide_taskfile *tf = &cmd->tf; |
1574cf6c BZ |
81 | void (*tf_outb)(u8 addr, unsigned long port); |
82 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
22aa4b32 | 83 | u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; |
1574cf6c BZ |
84 | |
85 | if (mmio) | |
86 | tf_outb = ide_mm_outb; | |
87 | else | |
88 | tf_outb = ide_outb; | |
89 | ||
22aa4b32 | 90 | if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED) |
1574cf6c BZ |
91 | HIHI = 0xFF; |
92 | ||
22aa4b32 | 93 | if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) |
1574cf6c | 94 | tf_outb(tf->hob_feature, io_ports->feature_addr); |
22aa4b32 | 95 | if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) |
1574cf6c | 96 | tf_outb(tf->hob_nsect, io_ports->nsect_addr); |
22aa4b32 | 97 | if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) |
1574cf6c | 98 | tf_outb(tf->hob_lbal, io_ports->lbal_addr); |
22aa4b32 | 99 | if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) |
1574cf6c | 100 | tf_outb(tf->hob_lbam, io_ports->lbam_addr); |
22aa4b32 | 101 | if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) |
1574cf6c BZ |
102 | tf_outb(tf->hob_lbah, io_ports->lbah_addr); |
103 | ||
22aa4b32 | 104 | if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE) |
1574cf6c | 105 | tf_outb(tf->feature, io_ports->feature_addr); |
22aa4b32 | 106 | if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT) |
1574cf6c | 107 | tf_outb(tf->nsect, io_ports->nsect_addr); |
22aa4b32 | 108 | if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL) |
1574cf6c | 109 | tf_outb(tf->lbal, io_ports->lbal_addr); |
22aa4b32 | 110 | if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM) |
1574cf6c | 111 | tf_outb(tf->lbam, io_ports->lbam_addr); |
22aa4b32 | 112 | if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH) |
1574cf6c BZ |
113 | tf_outb(tf->lbah, io_ports->lbah_addr); |
114 | ||
22aa4b32 | 115 | if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE) |
1574cf6c BZ |
116 | tf_outb((tf->device & HIHI) | drive->select, |
117 | io_ports->device_addr); | |
118 | } | |
119 | EXPORT_SYMBOL_GPL(ide_tf_load); | |
120 | ||
22aa4b32 | 121 | void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd) |
1574cf6c BZ |
122 | { |
123 | ide_hwif_t *hwif = drive->hwif; | |
124 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
22aa4b32 | 125 | struct ide_taskfile *tf = &cmd->tf; |
1574cf6c BZ |
126 | void (*tf_outb)(u8 addr, unsigned long port); |
127 | u8 (*tf_inb)(unsigned long port); | |
128 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
129 | ||
130 | if (mmio) { | |
131 | tf_outb = ide_mm_outb; | |
132 | tf_inb = ide_mm_inb; | |
133 | } else { | |
134 | tf_outb = ide_outb; | |
135 | tf_inb = ide_inb; | |
136 | } | |
137 | ||
1574cf6c | 138 | /* be sure we're looking at the low order bits */ |
4d74c3fc | 139 | tf_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr); |
1574cf6c | 140 | |
67625119 SS |
141 | if (cmd->tf_flags & IDE_TFLAG_IN_ERROR) |
142 | tf->error = tf_inb(io_ports->feature_addr); | |
22aa4b32 | 143 | if (cmd->tf_flags & IDE_TFLAG_IN_NSECT) |
1574cf6c | 144 | tf->nsect = tf_inb(io_ports->nsect_addr); |
22aa4b32 | 145 | if (cmd->tf_flags & IDE_TFLAG_IN_LBAL) |
1574cf6c | 146 | tf->lbal = tf_inb(io_ports->lbal_addr); |
22aa4b32 | 147 | if (cmd->tf_flags & IDE_TFLAG_IN_LBAM) |
1574cf6c | 148 | tf->lbam = tf_inb(io_ports->lbam_addr); |
22aa4b32 | 149 | if (cmd->tf_flags & IDE_TFLAG_IN_LBAH) |
1574cf6c | 150 | tf->lbah = tf_inb(io_ports->lbah_addr); |
22aa4b32 | 151 | if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE) |
1574cf6c BZ |
152 | tf->device = tf_inb(io_ports->device_addr); |
153 | ||
22aa4b32 | 154 | if (cmd->tf_flags & IDE_TFLAG_LBA48) { |
4d74c3fc | 155 | tf_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr); |
1574cf6c | 156 | |
67625119 SS |
157 | if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR) |
158 | tf->hob_error = tf_inb(io_ports->feature_addr); | |
22aa4b32 | 159 | if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT) |
67625119 | 160 | tf->hob_nsect = tf_inb(io_ports->nsect_addr); |
22aa4b32 | 161 | if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL) |
67625119 | 162 | tf->hob_lbal = tf_inb(io_ports->lbal_addr); |
22aa4b32 | 163 | if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM) |
67625119 | 164 | tf->hob_lbam = tf_inb(io_ports->lbam_addr); |
22aa4b32 | 165 | if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH) |
67625119 | 166 | tf->hob_lbah = tf_inb(io_ports->lbah_addr); |
1574cf6c BZ |
167 | } |
168 | } | |
169 | EXPORT_SYMBOL_GPL(ide_tf_read); | |
170 | ||
171 | /* | |
172 | * Some localbus EIDE interfaces require a special access sequence | |
173 | * when using 32-bit I/O instructions to transfer data. We call this | |
174 | * the "vlb_sync" sequence, which consists of three successive reads | |
175 | * of the sector count register location, with interrupts disabled | |
176 | * to ensure that the reads all happen together. | |
177 | */ | |
178 | static void ata_vlb_sync(unsigned long port) | |
179 | { | |
180 | (void)inb(port); | |
181 | (void)inb(port); | |
182 | (void)inb(port); | |
183 | } | |
184 | ||
185 | /* | |
186 | * This is used for most PIO data transfers *from* the IDE interface | |
187 | * | |
188 | * These routines will round up any request for an odd number of bytes, | |
189 | * so if an odd len is specified, be sure that there's at least one | |
190 | * extra byte allocated for the buffer. | |
191 | */ | |
adb1af98 | 192 | void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, |
1574cf6c BZ |
193 | unsigned int len) |
194 | { | |
195 | ide_hwif_t *hwif = drive->hwif; | |
196 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
197 | unsigned long data_addr = io_ports->data_addr; | |
deae17fd | 198 | unsigned int words = (len + 1) >> 1; |
1574cf6c BZ |
199 | u8 io_32bit = drive->io_32bit; |
200 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
201 | ||
1574cf6c BZ |
202 | if (io_32bit) { |
203 | unsigned long uninitialized_var(flags); | |
204 | ||
205 | if ((io_32bit & 2) && !mmio) { | |
206 | local_irq_save(flags); | |
207 | ata_vlb_sync(io_ports->nsect_addr); | |
208 | } | |
209 | ||
deae17fd | 210 | words >>= 1; |
1574cf6c | 211 | if (mmio) |
deae17fd | 212 | __ide_mm_insl((void __iomem *)data_addr, buf, words); |
1574cf6c | 213 | else |
deae17fd | 214 | insl(data_addr, buf, words); |
1574cf6c BZ |
215 | |
216 | if ((io_32bit & 2) && !mmio) | |
217 | local_irq_restore(flags); | |
218 | ||
deae17fd SS |
219 | if (((len + 1) & 3) < 2) |
220 | return; | |
221 | ||
222 | buf += len & ~3; | |
223 | words = 1; | |
1574cf6c | 224 | } |
deae17fd SS |
225 | |
226 | if (mmio) | |
227 | __ide_mm_insw((void __iomem *)data_addr, buf, words); | |
228 | else | |
229 | insw(data_addr, buf, words); | |
1574cf6c BZ |
230 | } |
231 | EXPORT_SYMBOL_GPL(ide_input_data); | |
232 | ||
233 | /* | |
234 | * This is used for most PIO data transfers *to* the IDE interface | |
235 | */ | |
adb1af98 | 236 | void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, |
1574cf6c BZ |
237 | unsigned int len) |
238 | { | |
239 | ide_hwif_t *hwif = drive->hwif; | |
240 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
241 | unsigned long data_addr = io_ports->data_addr; | |
deae17fd | 242 | unsigned int words = (len + 1) >> 1; |
1574cf6c BZ |
243 | u8 io_32bit = drive->io_32bit; |
244 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
245 | ||
1574cf6c BZ |
246 | if (io_32bit) { |
247 | unsigned long uninitialized_var(flags); | |
248 | ||
249 | if ((io_32bit & 2) && !mmio) { | |
250 | local_irq_save(flags); | |
251 | ata_vlb_sync(io_ports->nsect_addr); | |
252 | } | |
253 | ||
deae17fd | 254 | words >>= 1; |
1574cf6c | 255 | if (mmio) |
deae17fd | 256 | __ide_mm_outsl((void __iomem *)data_addr, buf, words); |
1574cf6c | 257 | else |
deae17fd | 258 | outsl(data_addr, buf, words); |
1574cf6c BZ |
259 | |
260 | if ((io_32bit & 2) && !mmio) | |
261 | local_irq_restore(flags); | |
262 | ||
deae17fd SS |
263 | if (((len + 1) & 3) < 2) |
264 | return; | |
265 | ||
266 | buf += len & ~3; | |
267 | words = 1; | |
1574cf6c | 268 | } |
deae17fd SS |
269 | |
270 | if (mmio) | |
271 | __ide_mm_outsw((void __iomem *)data_addr, buf, words); | |
272 | else | |
273 | outsw(data_addr, buf, words); | |
1574cf6c BZ |
274 | } |
275 | EXPORT_SYMBOL_GPL(ide_output_data); | |
276 | ||
277 | const struct ide_tp_ops default_tp_ops = { | |
278 | .exec_command = ide_exec_command, | |
279 | .read_status = ide_read_status, | |
280 | .read_altstatus = ide_read_altstatus, | |
ecf3a31d | 281 | .write_devctl = ide_write_devctl, |
1574cf6c BZ |
282 | |
283 | .tf_load = ide_tf_load, | |
284 | .tf_read = ide_tf_read, | |
285 | ||
286 | .input_data = ide_input_data, | |
287 | .output_data = ide_output_data, | |
288 | }; |