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-rw-r--r--drivers/ide/ide-lib.c240
1 files changed, 0 insertions, 240 deletions
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index 09526a0de734..f6c683dd2987 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -5,163 +5,6 @@
5#include <linux/ide.h> 5#include <linux/ide.h>
6#include <linux/bitops.h> 6#include <linux/bitops.h>
7 7
8static const char *udma_str[] =
9 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
10 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
11static const char *mwdma_str[] =
12 { "MWDMA0", "MWDMA1", "MWDMA2" };
13static const char *swdma_str[] =
14 { "SWDMA0", "SWDMA1", "SWDMA2" };
15static const char *pio_str[] =
16 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
17
18/**
19 * ide_xfer_verbose - return IDE mode names
20 * @mode: transfer mode
21 *
22 * Returns a constant string giving the name of the mode
23 * requested.
24 */
25
26const char *ide_xfer_verbose(u8 mode)
27{
28 const char *s;
29 u8 i = mode & 0xf;
30
31 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
32 s = udma_str[i];
33 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
34 s = mwdma_str[i];
35 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
36 s = swdma_str[i];
37 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
38 s = pio_str[i & 0x7];
39 else if (mode == XFER_PIO_SLOW)
40 s = "PIO SLOW";
41 else
42 s = "XFER ERROR";
43
44 return s;
45}
46EXPORT_SYMBOL(ide_xfer_verbose);
47
48/**
49 * ide_rate_filter - filter transfer mode
50 * @drive: IDE device
51 * @speed: desired speed
52 *
53 * Given the available transfer modes this function returns
54 * the best available speed at or below the speed requested.
55 *
56 * TODO: check device PIO capabilities
57 */
58
59static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
60{
61 ide_hwif_t *hwif = drive->hwif;
62 u8 mode = ide_find_dma_mode(drive, speed);
63
64 if (mode == 0) {
65 if (hwif->pio_mask)
66 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
67 else
68 mode = XFER_PIO_4;
69 }
70
71/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
72
73 return min(speed, mode);
74}
75
76/**
77 * ide_get_best_pio_mode - get PIO mode from drive
78 * @drive: drive to consider
79 * @mode_wanted: preferred mode
80 * @max_mode: highest allowed mode
81 *
82 * This routine returns the recommended PIO settings for a given drive,
83 * based on the drive->id information and the ide_pio_blacklist[].
84 *
85 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
86 * This is used by most chipset support modules when "auto-tuning".
87 */
88
89u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
90{
91 u16 *id = drive->id;
92 int pio_mode = -1, overridden = 0;
93
94 if (mode_wanted != 255)
95 return min_t(u8, mode_wanted, max_mode);
96
97 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
98 pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
99
100 if (pio_mode != -1) {
101 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
102 } else {
103 pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
104 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
105 pio_mode = 2;
106 overridden = 1;
107 }
108
109 if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
110 if (ata_id_has_iordy(id)) {
111 if (id[ATA_ID_PIO_MODES] & 7) {
112 overridden = 0;
113 if (id[ATA_ID_PIO_MODES] & 4)
114 pio_mode = 5;
115 else if (id[ATA_ID_PIO_MODES] & 2)
116 pio_mode = 4;
117 else
118 pio_mode = 3;
119 }
120 }
121 }
122
123 if (overridden)
124 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
125 drive->name);
126 }
127
128 if (pio_mode > max_mode)
129 pio_mode = max_mode;
130
131 return pio_mode;
132}
133EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
134
135/* req_pio == "255" for auto-tune */
136void ide_set_pio(ide_drive_t *drive, u8 req_pio)
137{
138 ide_hwif_t *hwif = drive->hwif;
139 const struct ide_port_ops *port_ops = hwif->port_ops;
140 u8 host_pio, pio;
141
142 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
143 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
144 return;
145
146 BUG_ON(hwif->pio_mask == 0x00);
147
148 host_pio = fls(hwif->pio_mask) - 1;
149
150 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
151
152 /*
153 * TODO:
154 * - report device max PIO mode
155 * - check req_pio != 255 against device max PIO mode
156 */
157 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
158 drive->name, host_pio, req_pio,
159 req_pio == 255 ? "(auto-tune)" : "", pio);
160
161 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
162}
163EXPORT_SYMBOL_GPL(ide_set_pio);
164
165/** 8/**
166 * ide_toggle_bounce - handle bounce buffering 9 * ide_toggle_bounce - handle bounce buffering
167 * @drive: drive to update 10 * @drive: drive to update
@@ -188,89 +31,6 @@ void ide_toggle_bounce(ide_drive_t *drive, int on)
188 blk_queue_bounce_limit(drive->queue, addr); 31 blk_queue_bounce_limit(drive->queue, addr);
189} 32}
190 33
191int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
192{
193 ide_hwif_t *hwif = drive->hwif;
194 const struct ide_port_ops *port_ops = hwif->port_ops;
195
196 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
197 return 0;
198
199 if (port_ops == NULL || port_ops->set_pio_mode == NULL)
200 return -1;
201
202 /*
203 * TODO: temporary hack for some legacy host drivers that didn't
204 * set transfer mode on the device in ->set_pio_mode method...
205 */
206 if (port_ops->set_dma_mode == NULL) {
207 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
208 return 0;
209 }
210
211 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
212 if (ide_config_drive_speed(drive, mode))
213 return -1;
214 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
215 return 0;
216 } else {
217 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
218 return ide_config_drive_speed(drive, mode);
219 }
220}
221
222int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
223{
224 ide_hwif_t *hwif = drive->hwif;
225 const struct ide_port_ops *port_ops = hwif->port_ops;
226
227 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
228 return 0;
229
230 if (port_ops == NULL || port_ops->set_dma_mode == NULL)
231 return -1;
232
233 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
234 if (ide_config_drive_speed(drive, mode))
235 return -1;
236 port_ops->set_dma_mode(drive, mode);
237 return 0;
238 } else {
239 port_ops->set_dma_mode(drive, mode);
240 return ide_config_drive_speed(drive, mode);
241 }
242}
243EXPORT_SYMBOL_GPL(ide_set_dma_mode);
244
245/**
246 * ide_set_xfer_rate - set transfer rate
247 * @drive: drive to set
248 * @rate: speed to attempt to set
249 *
250 * General helper for setting the speed of an IDE device. This
251 * function knows about user enforced limits from the configuration
252 * which ->set_pio_mode/->set_dma_mode does not.
253 */
254
255int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
256{
257 ide_hwif_t *hwif = drive->hwif;
258 const struct ide_port_ops *port_ops = hwif->port_ops;
259
260 if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
261 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
262 return -1;
263
264 rate = ide_rate_filter(drive, rate);
265
266 BUG_ON(rate < XFER_PIO_0);
267
268 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
269 return ide_set_pio_mode(drive, rate);
270
271 return ide_set_dma_mode(drive, rate);
272}
273
274static void ide_dump_opcode(ide_drive_t *drive) 34static void ide_dump_opcode(ide_drive_t *drive)
275{ 35{
276 struct request *rq = drive->hwif->rq; 36 struct request *rq = drive->hwif->rq;
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-15 04:03:31 -0500