sc1200: always tune PIO
[deliverable/linux.git] / drivers / ide / pci / atiixp.c
CommitLineData
1da177e4 1/*
485efc6c 2 * linux/drivers/ide/pci/atiixp.c Version 0.02 Jun 16 2007
1da177e4
LT
3 *
4 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
485efc6c 5 * Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz
1da177e4
LT
6 */
7
1da177e4
LT
8#include <linux/types.h>
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/ioport.h>
12#include <linux/pci.h>
13#include <linux/hdreg.h>
14#include <linux/ide.h>
15#include <linux/delay.h>
16#include <linux/init.h>
17
18#include <asm/io.h>
19
20#define ATIIXP_IDE_PIO_TIMING 0x40
21#define ATIIXP_IDE_MDMA_TIMING 0x44
22#define ATIIXP_IDE_PIO_CONTROL 0x48
23#define ATIIXP_IDE_PIO_MODE 0x4a
24#define ATIIXP_IDE_UDMA_CONTROL 0x54
25#define ATIIXP_IDE_UDMA_MODE 0x56
26
27typedef struct {
28 u8 command_width;
29 u8 recover_width;
30} atiixp_ide_timing;
31
32static atiixp_ide_timing pio_timing[] = {
33 { 0x05, 0x0d },
34 { 0x04, 0x07 },
35 { 0x03, 0x04 },
36 { 0x02, 0x02 },
37 { 0x02, 0x00 },
38};
39
40static atiixp_ide_timing mdma_timing[] = {
41 { 0x07, 0x07 },
42 { 0x02, 0x01 },
43 { 0x02, 0x00 },
44};
45
46static int save_mdma_mode[4];
47
6c5f8cc3
A
48static DEFINE_SPINLOCK(atiixp_lock);
49
1da177e4
LT
50/**
51 * atiixp_dma_2_pio - return the PIO mode matching DMA
52 * @xfer_rate: transfer speed
53 *
54 * Returns the nearest equivalent PIO timing for the PIO or DMA
55 * mode requested by the controller.
56 */
57
58static u8 atiixp_dma_2_pio(u8 xfer_rate) {
59 switch(xfer_rate) {
60 case XFER_UDMA_6:
61 case XFER_UDMA_5:
62 case XFER_UDMA_4:
63 case XFER_UDMA_3:
64 case XFER_UDMA_2:
65 case XFER_UDMA_1:
66 case XFER_UDMA_0:
67 case XFER_MW_DMA_2:
68 case XFER_PIO_4:
69 return 4;
70 case XFER_MW_DMA_1:
71 case XFER_PIO_3:
72 return 3;
73 case XFER_SW_DMA_2:
74 case XFER_PIO_2:
75 return 2;
76 case XFER_MW_DMA_0:
77 case XFER_SW_DMA_1:
78 case XFER_SW_DMA_0:
79 case XFER_PIO_1:
80 case XFER_PIO_0:
81 case XFER_PIO_SLOW:
82 default:
83 return 0;
84 }
85}
86
ccf35289 87static void atiixp_dma_host_on(ide_drive_t *drive)
1da177e4
LT
88{
89 struct pci_dev *dev = drive->hwif->pci_dev;
90 unsigned long flags;
91 u16 tmp16;
92
6c5f8cc3 93 spin_lock_irqsave(&atiixp_lock, flags);
1da177e4
LT
94
95 pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
96 if (save_mdma_mode[drive->dn])
97 tmp16 &= ~(1 << drive->dn);
98 else
99 tmp16 |= (1 << drive->dn);
100 pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
101
6c5f8cc3 102 spin_unlock_irqrestore(&atiixp_lock, flags);
1da177e4 103
ccf35289 104 ide_dma_host_on(drive);
1da177e4
LT
105}
106
7469aaf6 107static void atiixp_dma_host_off(ide_drive_t *drive)
1da177e4
LT
108{
109 struct pci_dev *dev = drive->hwif->pci_dev;
110 unsigned long flags;
111 u16 tmp16;
112
6c5f8cc3 113 spin_lock_irqsave(&atiixp_lock, flags);
1da177e4
LT
114
115 pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
116 tmp16 &= ~(1 << drive->dn);
117 pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
118
6c5f8cc3 119 spin_unlock_irqrestore(&atiixp_lock, flags);
1da177e4 120
7469aaf6 121 ide_dma_host_off(drive);
1da177e4
LT
122}
123
124/**
88b2b32b
BZ
125 * atiixp_set_pio_mode - set host controller for PIO mode
126 * @drive: drive
127 * @pio: PIO mode number
1da177e4
LT
128 *
129 * Set the interface PIO mode.
130 */
131
88b2b32b 132static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4
LT
133{
134 struct pci_dev *dev = drive->hwif->pci_dev;
135 unsigned long flags;
136 int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
137 u32 pio_timing_data;
138 u16 pio_mode_data;
139
6c5f8cc3 140 spin_lock_irqsave(&atiixp_lock, flags);
1da177e4
LT
141
142 pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
143 pio_mode_data &= ~(0x07 << (drive->dn * 4));
144 pio_mode_data |= (pio << (drive->dn * 4));
145 pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
146
147 pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
148 pio_timing_data &= ~(0xff << timing_shift);
149 pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
150 (pio_timing[pio].command_width << (timing_shift + 4));
151 pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
152
6c5f8cc3 153 spin_unlock_irqrestore(&atiixp_lock, flags);
1da177e4
LT
154}
155
156/**
88b2b32b
BZ
157 * atiixp_set_dma_mode - set host controller for DMA mode
158 * @drive: drive
159 * @speed: DMA mode
1da177e4 160 *
88b2b32b
BZ
161 * Set a ATIIXP host controller to the desired DMA mode. This involves
162 * programming the right timing data into the PCI configuration space.
1da177e4
LT
163 */
164
88b2b32b 165static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
1da177e4
LT
166{
167 struct pci_dev *dev = drive->hwif->pci_dev;
168 unsigned long flags;
169 int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
170 u32 tmp32;
171 u16 tmp16;
f212ff28 172 u8 pio;
1da177e4 173
6c5f8cc3 174 spin_lock_irqsave(&atiixp_lock, flags);
1da177e4
LT
175
176 save_mdma_mode[drive->dn] = 0;
177 if (speed >= XFER_UDMA_0) {
178 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
179 tmp16 &= ~(0x07 << (drive->dn * 4));
180 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
181 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
182 } else {
183 if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
184 save_mdma_mode[drive->dn] = speed;
185 pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
186 tmp32 &= ~(0xff << timing_shift);
187 tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
188 (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
189 pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
190 }
191 }
192
6c5f8cc3 193 spin_unlock_irqrestore(&atiixp_lock, flags);
1da177e4
LT
194
195 if (speed >= XFER_SW_DMA_0)
196 pio = atiixp_dma_2_pio(speed);
197 else
198 pio = speed - XFER_PIO_0;
199
88b2b32b 200 atiixp_set_pio_mode(drive, pio);
1da177e4
LT
201}
202
1da177e4
LT
203/**
204 * atiixp_dma_check - set up an IDE device
205 * @drive: IDE drive to configure
206 *
207 * Set up the ATIIXP interface for the best available speed on this
208 * interface, preferring DMA to PIO.
209 */
210
211static int atiixp_dma_check(ide_drive_t *drive)
212{
1da177e4
LT
213 drive->init_speed = 0;
214
29e744d0 215 if (ide_tune_dma(drive))
3608b5d7 216 return 0;
1da177e4 217
485efc6c 218 if (ide_use_fast_pio(drive))
26bcb879 219 ide_set_max_pio(drive);
d8f4469d 220
3608b5d7 221 return -1;
1da177e4
LT
222}
223
224/**
225 * init_hwif_atiixp - fill in the hwif for the ATIIXP
226 * @hwif: IDE interface
227 *
228 * Set up the ide_hwif_t for the ATIIXP interface according to the
229 * capabilities of the hardware.
230 */
231
232static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
233{
e5c073ff
CH
234 u8 udma_mode = 0;
235 u8 ch = hwif->channel;
236 struct pci_dev *pdev = hwif->pci_dev;
237
1da177e4 238 if (!hwif->irq)
e5c073ff 239 hwif->irq = ch ? 15 : 14;
1da177e4
LT
240
241 hwif->autodma = 0;
26bcb879 242 hwif->set_pio_mode = &atiixp_set_pio_mode;
88b2b32b 243 hwif->set_dma_mode = &atiixp_set_dma_mode;
1da177e4
LT
244 hwif->drives[0].autotune = 1;
245 hwif->drives[1].autotune = 1;
246
247 if (!hwif->dma_base)
248 return;
249
250 hwif->atapi_dma = 1;
251 hwif->ultra_mask = 0x3f;
252 hwif->mwdma_mask = 0x06;
253 hwif->swdma_mask = 0x04;
254
e5c073ff 255 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
49521f97 256
e5c073ff 257 if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
49521f97 258 hwif->cbl = ATA_CBL_PATA80;
e5c073ff 259 else
49521f97 260 hwif->cbl = ATA_CBL_PATA40;
e5c073ff 261
ccf35289 262 hwif->dma_host_on = &atiixp_dma_host_on;
7469aaf6 263 hwif->dma_host_off = &atiixp_dma_host_off;
1da177e4
LT
264 hwif->ide_dma_check = &atiixp_dma_check;
265 if (!noautodma)
266 hwif->autodma = 1;
267
268 hwif->drives[1].autodma = hwif->autodma;
269 hwif->drives[0].autodma = hwif->autodma;
270}
271
2b33b4dc 272
1da177e4
LT
273static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
274 { /* 0 */
275 .name = "ATIIXP",
276 .init_hwif = init_hwif_atiixp,
1da177e4
LT
277 .autodma = AUTODMA,
278 .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
279 .bootable = ON_BOARD,
4099d143 280 .pio_mask = ATA_PIO4,
b25168df
CH
281 },{ /* 1 */
282 .name = "SB600_PATA",
283 .init_hwif = init_hwif_atiixp,
b25168df
CH
284 .autodma = AUTODMA,
285 .enablebits = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
286 .bootable = ON_BOARD,
a5d8c5c8 287 .host_flags = IDE_HFLAG_SINGLE,
4099d143 288 .pio_mask = ATA_PIO4,
b25168df 289 },
1da177e4
LT
290};
291
292/**
293 * atiixp_init_one - called when a ATIIXP is found
294 * @dev: the atiixp device
295 * @id: the matching pci id
296 *
297 * Called when the PCI registration layer (or the IDE initialization)
298 * finds a device matching our IDE device tables.
299 */
300
301static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
302{
303 return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
304}
305
306static struct pci_device_id atiixp_pci_tbl[] = {
307 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
308 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
309 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
b25168df 310 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
7cfa7168 311 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1da177e4
LT
312 { 0, },
313};
314MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
315
316static struct pci_driver driver = {
317 .name = "ATIIXP_IDE",
318 .id_table = atiixp_pci_tbl,
319 .probe = atiixp_init_one,
320};
321
82ab1eec 322static int __init atiixp_ide_init(void)
1da177e4
LT
323{
324 return ide_pci_register_driver(&driver);
325}
326
327module_init(atiixp_ide_init);
328
329MODULE_AUTHOR("HUI YU");
330MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
331MODULE_LICENSE("GPL");
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