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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004 | |
3 | * | |
4 | * Copyright (C) 2003 ATI Inc. <hyu@ati.com> | |
5 | * Copyright (C) 2004 Bartlomiej Zolnierkiewicz | |
6 | * | |
7 | */ | |
8 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/types.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/ioport.h> | |
14 | #include <linux/pci.h> | |
15 | #include <linux/hdreg.h> | |
16 | #include <linux/ide.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <asm/io.h> | |
21 | ||
22 | #define ATIIXP_IDE_PIO_TIMING 0x40 | |
23 | #define ATIIXP_IDE_MDMA_TIMING 0x44 | |
24 | #define ATIIXP_IDE_PIO_CONTROL 0x48 | |
25 | #define ATIIXP_IDE_PIO_MODE 0x4a | |
26 | #define ATIIXP_IDE_UDMA_CONTROL 0x54 | |
27 | #define ATIIXP_IDE_UDMA_MODE 0x56 | |
28 | ||
29 | typedef struct { | |
30 | u8 command_width; | |
31 | u8 recover_width; | |
32 | } atiixp_ide_timing; | |
33 | ||
34 | static atiixp_ide_timing pio_timing[] = { | |
35 | { 0x05, 0x0d }, | |
36 | { 0x04, 0x07 }, | |
37 | { 0x03, 0x04 }, | |
38 | { 0x02, 0x02 }, | |
39 | { 0x02, 0x00 }, | |
40 | }; | |
41 | ||
42 | static atiixp_ide_timing mdma_timing[] = { | |
43 | { 0x07, 0x07 }, | |
44 | { 0x02, 0x01 }, | |
45 | { 0x02, 0x00 }, | |
46 | }; | |
47 | ||
48 | static int save_mdma_mode[4]; | |
49 | ||
50 | /** | |
51 | * atiixp_ratemask - compute rate mask for ATIIXP IDE | |
52 | * @drive: IDE drive to compute for | |
53 | * | |
54 | * Returns the available modes for the ATIIXP IDE controller. | |
55 | */ | |
56 | ||
57 | static u8 atiixp_ratemask(ide_drive_t *drive) | |
58 | { | |
59 | u8 mode = 3; | |
60 | ||
61 | if (!eighty_ninty_three(drive)) | |
62 | mode = min(mode, (u8)1); | |
63 | return mode; | |
64 | } | |
65 | ||
66 | /** | |
67 | * atiixp_dma_2_pio - return the PIO mode matching DMA | |
68 | * @xfer_rate: transfer speed | |
69 | * | |
70 | * Returns the nearest equivalent PIO timing for the PIO or DMA | |
71 | * mode requested by the controller. | |
72 | */ | |
73 | ||
74 | static u8 atiixp_dma_2_pio(u8 xfer_rate) { | |
75 | switch(xfer_rate) { | |
76 | case XFER_UDMA_6: | |
77 | case XFER_UDMA_5: | |
78 | case XFER_UDMA_4: | |
79 | case XFER_UDMA_3: | |
80 | case XFER_UDMA_2: | |
81 | case XFER_UDMA_1: | |
82 | case XFER_UDMA_0: | |
83 | case XFER_MW_DMA_2: | |
84 | case XFER_PIO_4: | |
85 | return 4; | |
86 | case XFER_MW_DMA_1: | |
87 | case XFER_PIO_3: | |
88 | return 3; | |
89 | case XFER_SW_DMA_2: | |
90 | case XFER_PIO_2: | |
91 | return 2; | |
92 | case XFER_MW_DMA_0: | |
93 | case XFER_SW_DMA_1: | |
94 | case XFER_SW_DMA_0: | |
95 | case XFER_PIO_1: | |
96 | case XFER_PIO_0: | |
97 | case XFER_PIO_SLOW: | |
98 | default: | |
99 | return 0; | |
100 | } | |
101 | } | |
102 | ||
103 | static int atiixp_ide_dma_host_on(ide_drive_t *drive) | |
104 | { | |
105 | struct pci_dev *dev = drive->hwif->pci_dev; | |
106 | unsigned long flags; | |
107 | u16 tmp16; | |
108 | ||
109 | spin_lock_irqsave(&ide_lock, flags); | |
110 | ||
111 | pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16); | |
112 | if (save_mdma_mode[drive->dn]) | |
113 | tmp16 &= ~(1 << drive->dn); | |
114 | else | |
115 | tmp16 |= (1 << drive->dn); | |
116 | pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16); | |
117 | ||
118 | spin_unlock_irqrestore(&ide_lock, flags); | |
119 | ||
120 | return __ide_dma_host_on(drive); | |
121 | } | |
122 | ||
123 | static int atiixp_ide_dma_host_off(ide_drive_t *drive) | |
124 | { | |
125 | struct pci_dev *dev = drive->hwif->pci_dev; | |
126 | unsigned long flags; | |
127 | u16 tmp16; | |
128 | ||
129 | spin_lock_irqsave(&ide_lock, flags); | |
130 | ||
131 | pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16); | |
132 | tmp16 &= ~(1 << drive->dn); | |
133 | pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16); | |
134 | ||
135 | spin_unlock_irqrestore(&ide_lock, flags); | |
136 | ||
137 | return __ide_dma_host_off(drive); | |
138 | } | |
139 | ||
140 | /** | |
141 | * atiixp_tune_drive - tune a drive attached to a ATIIXP | |
142 | * @drive: drive to tune | |
143 | * @pio: desired PIO mode | |
144 | * | |
145 | * Set the interface PIO mode. | |
146 | */ | |
147 | ||
148 | static void atiixp_tuneproc(ide_drive_t *drive, u8 pio) | |
149 | { | |
150 | struct pci_dev *dev = drive->hwif->pci_dev; | |
151 | unsigned long flags; | |
152 | int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8; | |
153 | u32 pio_timing_data; | |
154 | u16 pio_mode_data; | |
155 | ||
156 | spin_lock_irqsave(&ide_lock, flags); | |
157 | ||
158 | pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data); | |
159 | pio_mode_data &= ~(0x07 << (drive->dn * 4)); | |
160 | pio_mode_data |= (pio << (drive->dn * 4)); | |
161 | pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data); | |
162 | ||
163 | pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data); | |
164 | pio_timing_data &= ~(0xff << timing_shift); | |
165 | pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) | | |
166 | (pio_timing[pio].command_width << (timing_shift + 4)); | |
167 | pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data); | |
168 | ||
169 | spin_unlock_irqrestore(&ide_lock, flags); | |
170 | } | |
171 | ||
172 | /** | |
173 | * atiixp_tune_chipset - tune a ATIIXP interface | |
174 | * @drive: IDE drive to tune | |
175 | * @xferspeed: speed to configure | |
176 | * | |
177 | * Set a ATIIXP interface channel to the desired speeds. This involves | |
178 | * requires the right timing data into the ATIIXP configuration space | |
179 | * then setting the drive parameters appropriately | |
180 | */ | |
181 | ||
182 | static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed) | |
183 | { | |
184 | struct pci_dev *dev = drive->hwif->pci_dev; | |
185 | unsigned long flags; | |
186 | int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8; | |
187 | u32 tmp32; | |
188 | u16 tmp16; | |
189 | u8 speed, pio; | |
190 | ||
191 | speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed); | |
192 | ||
193 | spin_lock_irqsave(&ide_lock, flags); | |
194 | ||
195 | save_mdma_mode[drive->dn] = 0; | |
196 | if (speed >= XFER_UDMA_0) { | |
197 | pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16); | |
198 | tmp16 &= ~(0x07 << (drive->dn * 4)); | |
199 | tmp16 |= ((speed & 0x07) << (drive->dn * 4)); | |
200 | pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16); | |
201 | } else { | |
202 | if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) { | |
203 | save_mdma_mode[drive->dn] = speed; | |
204 | pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32); | |
205 | tmp32 &= ~(0xff << timing_shift); | |
206 | tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) | | |
207 | (mdma_timing[speed & 0x03].command_width << (timing_shift + 4)); | |
208 | pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32); | |
209 | } | |
210 | } | |
211 | ||
212 | spin_unlock_irqrestore(&ide_lock, flags); | |
213 | ||
214 | if (speed >= XFER_SW_DMA_0) | |
215 | pio = atiixp_dma_2_pio(speed); | |
216 | else | |
217 | pio = speed - XFER_PIO_0; | |
218 | ||
219 | atiixp_tuneproc(drive, pio); | |
220 | ||
221 | return ide_config_drive_speed(drive, speed); | |
222 | } | |
223 | ||
224 | /** | |
225 | * atiixp_config_drive_for_dma - configure drive for DMA | |
226 | * @drive: IDE drive to configure | |
227 | * | |
228 | * Set up a ATIIXP interface channel for the best available speed. | |
229 | * We prefer UDMA if it is available and then MWDMA. If DMA is | |
230 | * not available we switch to PIO and return 0. | |
231 | */ | |
232 | ||
233 | static int atiixp_config_drive_for_dma(ide_drive_t *drive) | |
234 | { | |
235 | u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive)); | |
236 | ||
237 | /* If no DMA speed was available then disable DMA and use PIO. */ | |
238 | if (!speed) { | |
239 | u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL); | |
240 | speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0; | |
241 | } | |
242 | ||
243 | (void) atiixp_speedproc(drive, speed); | |
244 | return ide_dma_enable(drive); | |
245 | } | |
246 | ||
247 | /** | |
248 | * atiixp_dma_check - set up an IDE device | |
249 | * @drive: IDE drive to configure | |
250 | * | |
251 | * Set up the ATIIXP interface for the best available speed on this | |
252 | * interface, preferring DMA to PIO. | |
253 | */ | |
254 | ||
255 | static int atiixp_dma_check(ide_drive_t *drive) | |
256 | { | |
257 | ide_hwif_t *hwif = HWIF(drive); | |
258 | struct hd_driveid *id = drive->id; | |
259 | u8 tspeed, speed; | |
260 | ||
261 | drive->init_speed = 0; | |
262 | ||
263 | if ((id->capability & 1) && drive->autodma) { | |
264 | ||
265 | if (ide_use_dma(drive)) { | |
266 | if (atiixp_config_drive_for_dma(drive)) | |
267 | return hwif->ide_dma_on(drive); | |
268 | } | |
269 | ||
270 | goto fast_ata_pio; | |
271 | ||
272 | } else if ((id->capability & 8) || (id->field_valid & 2)) { | |
273 | fast_ata_pio: | |
274 | tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL); | |
275 | speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0; | |
276 | hwif->speedproc(drive, speed); | |
277 | return hwif->ide_dma_off_quietly(drive); | |
278 | } | |
279 | /* IORDY not supported */ | |
280 | return 0; | |
281 | } | |
282 | ||
283 | /** | |
284 | * init_hwif_atiixp - fill in the hwif for the ATIIXP | |
285 | * @hwif: IDE interface | |
286 | * | |
287 | * Set up the ide_hwif_t for the ATIIXP interface according to the | |
288 | * capabilities of the hardware. | |
289 | */ | |
290 | ||
291 | static void __devinit init_hwif_atiixp(ide_hwif_t *hwif) | |
292 | { | |
293 | if (!hwif->irq) | |
294 | hwif->irq = hwif->channel ? 15 : 14; | |
295 | ||
296 | hwif->autodma = 0; | |
297 | hwif->tuneproc = &atiixp_tuneproc; | |
298 | hwif->speedproc = &atiixp_speedproc; | |
299 | hwif->drives[0].autotune = 1; | |
300 | hwif->drives[1].autotune = 1; | |
301 | ||
302 | if (!hwif->dma_base) | |
303 | return; | |
304 | ||
305 | hwif->atapi_dma = 1; | |
306 | hwif->ultra_mask = 0x3f; | |
307 | hwif->mwdma_mask = 0x06; | |
308 | hwif->swdma_mask = 0x04; | |
309 | ||
310 | /* FIXME: proper cable detection needed */ | |
311 | hwif->udma_four = 1; | |
312 | hwif->ide_dma_host_on = &atiixp_ide_dma_host_on; | |
313 | hwif->ide_dma_host_off = &atiixp_ide_dma_host_off; | |
314 | hwif->ide_dma_check = &atiixp_dma_check; | |
315 | if (!noautodma) | |
316 | hwif->autodma = 1; | |
317 | ||
318 | hwif->drives[1].autodma = hwif->autodma; | |
319 | hwif->drives[0].autodma = hwif->autodma; | |
320 | } | |
321 | ||
322 | static ide_pci_device_t atiixp_pci_info[] __devinitdata = { | |
323 | { /* 0 */ | |
324 | .name = "ATIIXP", | |
325 | .init_hwif = init_hwif_atiixp, | |
326 | .channels = 2, | |
327 | .autodma = AUTODMA, | |
328 | .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}}, | |
329 | .bootable = ON_BOARD, | |
330 | } | |
331 | }; | |
332 | ||
333 | /** | |
334 | * atiixp_init_one - called when a ATIIXP is found | |
335 | * @dev: the atiixp device | |
336 | * @id: the matching pci id | |
337 | * | |
338 | * Called when the PCI registration layer (or the IDE initialization) | |
339 | * finds a device matching our IDE device tables. | |
340 | */ | |
341 | ||
342 | static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
343 | { | |
344 | return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]); | |
345 | } | |
346 | ||
347 | static struct pci_device_id atiixp_pci_tbl[] = { | |
348 | { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
349 | { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
350 | { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
351 | { 0, }, | |
352 | }; | |
353 | MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl); | |
354 | ||
355 | static struct pci_driver driver = { | |
356 | .name = "ATIIXP_IDE", | |
357 | .id_table = atiixp_pci_tbl, | |
358 | .probe = atiixp_init_one, | |
359 | }; | |
360 | ||
361 | static int atiixp_ide_init(void) | |
362 | { | |
363 | return ide_pci_register_driver(&driver); | |
364 | } | |
365 | ||
366 | module_init(atiixp_ide_init); | |
367 | ||
368 | MODULE_AUTHOR("HUI YU"); | |
369 | MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE"); | |
370 | MODULE_LICENSE("GPL"); |