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