Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * sata_via.c - VIA Serial ATA controllers |
3 | * | |
8c3d3d4b | 4 | * Maintained by: Tejun Heo <tj@kernel.org> |
af36d7f0 | 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
5796d1c4 | 6 | * on emails. |
af36d7f0 JG |
7 | * |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
9bb9a39c | 28 | * as Documentation/driver-api/libata.rst |
af36d7f0 JG |
29 | * |
30 | * Hardware documentation available under NDA. | |
31 | * | |
32 | * | |
af36d7f0 | 33 | * |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/pci.h> | |
1da177e4 LT |
39 | #include <linux/blkdev.h> |
40 | #include <linux/delay.h> | |
a9524a76 | 41 | #include <linux/device.h> |
a55ab496 BH |
42 | #include <scsi/scsi.h> |
43 | #include <scsi/scsi_cmnd.h> | |
1da177e4 LT |
44 | #include <scsi/scsi_host.h> |
45 | #include <linux/libata.h> | |
1da177e4 LT |
46 | |
47 | #define DRV_NAME "sata_via" | |
a55ab496 | 48 | #define DRV_VERSION "2.6" |
1da177e4 | 49 | |
b9d5b89b TH |
50 | /* |
51 | * vt8251 is different from other sata controllers of VIA. It has two | |
52 | * channels, each channel has both Master and Slave slot. | |
53 | */ | |
1da177e4 LT |
54 | enum board_ids_enum { |
55 | vt6420, | |
56 | vt6421, | |
b9d5b89b | 57 | vt8251, |
1da177e4 LT |
58 | }; |
59 | ||
60 | enum { | |
61 | SATA_CHAN_ENAB = 0x40, /* SATA channel enable */ | |
62 | SATA_INT_GATE = 0x41, /* SATA interrupt gating */ | |
63 | SATA_NATIVE_MODE = 0x42, /* Native mode enable */ | |
57e5568f | 64 | SVIA_MISC_3 = 0x46, /* Miscellaneous Control III */ |
d73f30e1 A |
65 | PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */ |
66 | PATA_PIO_TIMING = 0xAB, /* PATA timing register */ | |
a84471fe | 67 | |
1da177e4 LT |
68 | PORT0 = (1 << 1), |
69 | PORT1 = (1 << 0), | |
70 | ALL_PORTS = PORT0 | PORT1, | |
1da177e4 LT |
71 | |
72 | NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4), | |
73 | ||
74 | SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */ | |
57e5568f OZ |
75 | |
76 | SATA_HOTPLUG = (1 << 5), /* enable IRQ on hotplug */ | |
1da177e4 LT |
77 | }; |
78 | ||
44a9b494 OZ |
79 | struct svia_priv { |
80 | bool wd_workaround; | |
81 | }; | |
82 | ||
98633258 OZ |
83 | static int vt6420_hotplug; |
84 | module_param_named(vt6420_hotplug, vt6420_hotplug, int, 0644); | |
85 | MODULE_PARM_DESC(vt6420_hotplug, "Enable hot-plug support for VT6420 (0=Don't support, 1=support)"); | |
86 | ||
5796d1c4 | 87 | static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); |
44a9b494 OZ |
88 | #ifdef CONFIG_PM_SLEEP |
89 | static int svia_pci_device_resume(struct pci_dev *pdev); | |
90 | #endif | |
82ef04fb TH |
91 | static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); |
92 | static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); | |
b9d5b89b TH |
93 | static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val); |
94 | static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val); | |
b78152e9 | 95 | static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); |
17234246 | 96 | static void svia_noop_freeze(struct ata_port *ap); |
a1efdaba | 97 | static int vt6420_prereset(struct ata_link *link, unsigned long deadline); |
a55ab496 | 98 | static void vt6420_bmdma_start(struct ata_queued_cmd *qc); |
a0fcdc02 | 99 | static int vt6421_pata_cable_detect(struct ata_port *ap); |
d73f30e1 A |
100 | static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev); |
101 | static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev); | |
44a9b494 | 102 | static void vt6421_error_handler(struct ata_port *ap); |
1da177e4 | 103 | |
3b7d697d | 104 | static const struct pci_device_id svia_pci_tbl[] = { |
96bc103f | 105 | { PCI_VDEVICE(VIA, 0x5337), vt6420 }, |
b9d5b89b TH |
106 | { PCI_VDEVICE(VIA, 0x0591), vt6420 }, /* 2 sata chnls (Master) */ |
107 | { PCI_VDEVICE(VIA, 0x3149), vt6420 }, /* 2 sata chnls (Master) */ | |
108 | { PCI_VDEVICE(VIA, 0x3249), vt6421 }, /* 2 sata chnls, 1 pata chnl */ | |
52df0ee0 JG |
109 | { PCI_VDEVICE(VIA, 0x5372), vt6420 }, |
110 | { PCI_VDEVICE(VIA, 0x7372), vt6420 }, | |
b9d5b89b | 111 | { PCI_VDEVICE(VIA, 0x5287), vt8251 }, /* 2 sata chnls (Master/Slave) */ |
68139520 | 112 | { PCI_VDEVICE(VIA, 0x9000), vt8251 }, |
1da177e4 LT |
113 | |
114 | { } /* terminate list */ | |
115 | }; | |
116 | ||
117 | static struct pci_driver svia_pci_driver = { | |
118 | .name = DRV_NAME, | |
119 | .id_table = svia_pci_tbl, | |
120 | .probe = svia_init_one, | |
58eb8cd5 | 121 | #ifdef CONFIG_PM_SLEEP |
e1e143cf | 122 | .suspend = ata_pci_device_suspend, |
44a9b494 | 123 | .resume = svia_pci_device_resume, |
e1e143cf | 124 | #endif |
1da177e4 LT |
125 | .remove = ata_pci_remove_one, |
126 | }; | |
127 | ||
193515d5 | 128 | static struct scsi_host_template svia_sht = { |
68d1d07b | 129 | ATA_BMDMA_SHT(DRV_NAME), |
1da177e4 LT |
130 | }; |
131 | ||
b78152e9 | 132 | static struct ata_port_operations svia_base_ops = { |
029cfd6b | 133 | .inherits = &ata_bmdma_port_ops, |
b78152e9 TH |
134 | .sff_tf_load = svia_tf_load, |
135 | }; | |
136 | ||
137 | static struct ata_port_operations vt6420_sata_ops = { | |
138 | .inherits = &svia_base_ops, | |
17234246 | 139 | .freeze = svia_noop_freeze, |
a1efdaba | 140 | .prereset = vt6420_prereset, |
a55ab496 | 141 | .bmdma_start = vt6420_bmdma_start, |
ac2164d5 TH |
142 | }; |
143 | ||
029cfd6b | 144 | static struct ata_port_operations vt6421_pata_ops = { |
b78152e9 | 145 | .inherits = &svia_base_ops, |
029cfd6b | 146 | .cable_detect = vt6421_pata_cable_detect, |
d73f30e1 A |
147 | .set_piomode = vt6421_set_pio_mode, |
148 | .set_dmamode = vt6421_set_dma_mode, | |
d73f30e1 A |
149 | }; |
150 | ||
029cfd6b | 151 | static struct ata_port_operations vt6421_sata_ops = { |
b78152e9 | 152 | .inherits = &svia_base_ops, |
1da177e4 LT |
153 | .scr_read = svia_scr_read, |
154 | .scr_write = svia_scr_write, | |
44a9b494 | 155 | .error_handler = vt6421_error_handler, |
1da177e4 LT |
156 | }; |
157 | ||
b9d5b89b TH |
158 | static struct ata_port_operations vt8251_ops = { |
159 | .inherits = &svia_base_ops, | |
160 | .hardreset = sata_std_hardreset, | |
161 | .scr_read = vt8251_scr_read, | |
162 | .scr_write = vt8251_scr_write, | |
163 | }; | |
164 | ||
eca25dca | 165 | static const struct ata_port_info vt6420_port_info = { |
9cbe056f | 166 | .flags = ATA_FLAG_SATA, |
14bdef98 EIB |
167 | .pio_mask = ATA_PIO4, |
168 | .mwdma_mask = ATA_MWDMA2, | |
bf6263a8 | 169 | .udma_mask = ATA_UDMA6, |
ac2164d5 | 170 | .port_ops = &vt6420_sata_ops, |
1da177e4 LT |
171 | }; |
172 | ||
f356b082 | 173 | static const struct ata_port_info vt6421_sport_info = { |
9cbe056f | 174 | .flags = ATA_FLAG_SATA, |
14bdef98 EIB |
175 | .pio_mask = ATA_PIO4, |
176 | .mwdma_mask = ATA_MWDMA2, | |
bf6263a8 | 177 | .udma_mask = ATA_UDMA6, |
eca25dca TH |
178 | .port_ops = &vt6421_sata_ops, |
179 | }; | |
180 | ||
f356b082 | 181 | static const struct ata_port_info vt6421_pport_info = { |
9cbe056f | 182 | .flags = ATA_FLAG_SLAVE_POSS, |
14bdef98 EIB |
183 | .pio_mask = ATA_PIO4, |
184 | /* No MWDMA */ | |
bf6263a8 | 185 | .udma_mask = ATA_UDMA6, |
eca25dca TH |
186 | .port_ops = &vt6421_pata_ops, |
187 | }; | |
188 | ||
f356b082 | 189 | static const struct ata_port_info vt8251_port_info = { |
9cbe056f | 190 | .flags = ATA_FLAG_SATA | ATA_FLAG_SLAVE_POSS, |
14bdef98 EIB |
191 | .pio_mask = ATA_PIO4, |
192 | .mwdma_mask = ATA_MWDMA2, | |
b9d5b89b TH |
193 | .udma_mask = ATA_UDMA6, |
194 | .port_ops = &vt8251_ops, | |
195 | }; | |
196 | ||
1da177e4 LT |
197 | MODULE_AUTHOR("Jeff Garzik"); |
198 | MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers"); | |
199 | MODULE_LICENSE("GPL"); | |
200 | MODULE_DEVICE_TABLE(pci, svia_pci_tbl); | |
201 | MODULE_VERSION(DRV_VERSION); | |
202 | ||
82ef04fb | 203 | static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) |
1da177e4 LT |
204 | { |
205 | if (sc_reg > SCR_CONTROL) | |
da3dbb17 | 206 | return -EINVAL; |
82ef04fb | 207 | *val = ioread32(link->ap->ioaddr.scr_addr + (4 * sc_reg)); |
da3dbb17 | 208 | return 0; |
1da177e4 LT |
209 | } |
210 | ||
82ef04fb | 211 | static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) |
1da177e4 LT |
212 | { |
213 | if (sc_reg > SCR_CONTROL) | |
da3dbb17 | 214 | return -EINVAL; |
82ef04fb | 215 | iowrite32(val, link->ap->ioaddr.scr_addr + (4 * sc_reg)); |
da3dbb17 | 216 | return 0; |
1da177e4 LT |
217 | } |
218 | ||
b9d5b89b TH |
219 | static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val) |
220 | { | |
221 | static const u8 ipm_tbl[] = { 1, 2, 6, 0 }; | |
222 | struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); | |
223 | int slot = 2 * link->ap->port_no + link->pmp; | |
224 | u32 v = 0; | |
225 | u8 raw; | |
226 | ||
227 | switch (scr) { | |
228 | case SCR_STATUS: | |
229 | pci_read_config_byte(pdev, 0xA0 + slot, &raw); | |
230 | ||
231 | /* read the DET field, bit0 and 1 of the config byte */ | |
232 | v |= raw & 0x03; | |
233 | ||
234 | /* read the SPD field, bit4 of the configure byte */ | |
235 | if (raw & (1 << 4)) | |
236 | v |= 0x02 << 4; | |
237 | else | |
238 | v |= 0x01 << 4; | |
239 | ||
240 | /* read the IPM field, bit2 and 3 of the config byte */ | |
241 | v |= ipm_tbl[(raw >> 2) & 0x3]; | |
242 | break; | |
243 | ||
244 | case SCR_ERROR: | |
245 | /* devices other than 5287 uses 0xA8 as base */ | |
246 | WARN_ON(pdev->device != 0x5287); | |
247 | pci_read_config_dword(pdev, 0xB0 + slot * 4, &v); | |
248 | break; | |
249 | ||
250 | case SCR_CONTROL: | |
251 | pci_read_config_byte(pdev, 0xA4 + slot, &raw); | |
252 | ||
253 | /* read the DET field, bit0 and bit1 */ | |
254 | v |= ((raw & 0x02) << 1) | (raw & 0x01); | |
255 | ||
256 | /* read the IPM field, bit2 and bit3 */ | |
257 | v |= ((raw >> 2) & 0x03) << 8; | |
258 | break; | |
259 | ||
260 | default: | |
261 | return -EINVAL; | |
262 | } | |
263 | ||
264 | *val = v; | |
265 | return 0; | |
266 | } | |
267 | ||
268 | static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val) | |
269 | { | |
270 | struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); | |
271 | int slot = 2 * link->ap->port_no + link->pmp; | |
272 | u32 v = 0; | |
273 | ||
274 | switch (scr) { | |
275 | case SCR_ERROR: | |
276 | /* devices other than 5287 uses 0xA8 as base */ | |
277 | WARN_ON(pdev->device != 0x5287); | |
278 | pci_write_config_dword(pdev, 0xB0 + slot * 4, val); | |
279 | return 0; | |
280 | ||
281 | case SCR_CONTROL: | |
282 | /* set the DET field */ | |
283 | v |= ((val & 0x4) >> 1) | (val & 0x1); | |
284 | ||
285 | /* set the IPM field */ | |
286 | v |= ((val >> 8) & 0x3) << 2; | |
287 | ||
288 | pci_write_config_byte(pdev, 0xA4 + slot, v); | |
289 | return 0; | |
290 | ||
291 | default: | |
292 | return -EINVAL; | |
293 | } | |
294 | } | |
295 | ||
b78152e9 TH |
296 | /** |
297 | * svia_tf_load - send taskfile registers to host controller | |
298 | * @ap: Port to which output is sent | |
299 | * @tf: ATA taskfile register set | |
300 | * | |
301 | * Outputs ATA taskfile to standard ATA host controller. | |
302 | * | |
303 | * This is to fix the internal bug of via chipsets, which will | |
304 | * reset the device register after changing the IEN bit on ctl | |
305 | * register. | |
306 | */ | |
307 | static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) | |
308 | { | |
309 | struct ata_taskfile ttf; | |
310 | ||
311 | if (tf->ctl != ap->last_ctl) { | |
312 | ttf = *tf; | |
313 | ttf.flags |= ATA_TFLAG_DEVICE; | |
314 | tf = &ttf; | |
315 | } | |
316 | ata_sff_tf_load(ap, tf); | |
317 | } | |
318 | ||
17234246 TH |
319 | static void svia_noop_freeze(struct ata_port *ap) |
320 | { | |
321 | /* Some VIA controllers choke if ATA_NIEN is manipulated in | |
322 | * certain way. Leave it alone and just clear pending IRQ. | |
323 | */ | |
5682ed33 | 324 | ap->ops->sff_check_status(ap); |
37f65b8b | 325 | ata_bmdma_irq_clear(ap); |
17234246 TH |
326 | } |
327 | ||
ac2164d5 TH |
328 | /** |
329 | * vt6420_prereset - prereset for vt6420 | |
cc0680a5 | 330 | * @link: target ATA link |
d4b2bab4 | 331 | * @deadline: deadline jiffies for the operation |
ac2164d5 TH |
332 | * |
333 | * SCR registers on vt6420 are pieces of shit and may hang the | |
334 | * whole machine completely if accessed with the wrong timing. | |
335 | * To avoid such catastrophe, vt6420 doesn't provide generic SCR | |
336 | * access operations, but uses SStatus and SControl only during | |
337 | * boot probing in controlled way. | |
338 | * | |
339 | * As the old (pre EH update) probing code is proven to work, we | |
340 | * strictly follow the access pattern. | |
341 | * | |
342 | * LOCKING: | |
343 | * Kernel thread context (may sleep) | |
344 | * | |
345 | * RETURNS: | |
346 | * 0 on success, -errno otherwise. | |
347 | */ | |
cc0680a5 | 348 | static int vt6420_prereset(struct ata_link *link, unsigned long deadline) |
ac2164d5 | 349 | { |
cc0680a5 | 350 | struct ata_port *ap = link->ap; |
9af5c9c9 | 351 | struct ata_eh_context *ehc = &ap->link.eh_context; |
ac2164d5 TH |
352 | unsigned long timeout = jiffies + (HZ * 5); |
353 | u32 sstatus, scontrol; | |
354 | int online; | |
355 | ||
356 | /* don't do any SCR stuff if we're not loading */ | |
68ff6e8e | 357 | if (!(ap->pflags & ATA_PFLAG_LOADING)) |
ac2164d5 TH |
358 | goto skip_scr; |
359 | ||
a09060ff | 360 | /* Resume phy. This is the old SATA resume sequence */ |
82ef04fb TH |
361 | svia_scr_write(link, SCR_CONTROL, 0x300); |
362 | svia_scr_read(link, SCR_CONTROL, &scontrol); /* flush */ | |
ac2164d5 TH |
363 | |
364 | /* wait for phy to become ready, if necessary */ | |
365 | do { | |
97750ceb | 366 | ata_msleep(link->ap, 200); |
82ef04fb | 367 | svia_scr_read(link, SCR_STATUS, &sstatus); |
da3dbb17 | 368 | if ((sstatus & 0xf) != 1) |
ac2164d5 TH |
369 | break; |
370 | } while (time_before(jiffies, timeout)); | |
371 | ||
372 | /* open code sata_print_link_status() */ | |
82ef04fb TH |
373 | svia_scr_read(link, SCR_STATUS, &sstatus); |
374 | svia_scr_read(link, SCR_CONTROL, &scontrol); | |
ac2164d5 TH |
375 | |
376 | online = (sstatus & 0xf) == 0x3; | |
377 | ||
a9a79dfe JP |
378 | ata_port_info(ap, |
379 | "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n", | |
380 | online ? "up" : "down", sstatus, scontrol); | |
ac2164d5 TH |
381 | |
382 | /* SStatus is read one more time */ | |
82ef04fb | 383 | svia_scr_read(link, SCR_STATUS, &sstatus); |
ac2164d5 TH |
384 | |
385 | if (!online) { | |
386 | /* tell EH to bail */ | |
cf480626 | 387 | ehc->i.action &= ~ATA_EH_RESET; |
ac2164d5 TH |
388 | return 0; |
389 | } | |
390 | ||
391 | skip_scr: | |
392 | /* wait for !BSY */ | |
705e76be | 393 | ata_sff_wait_ready(link, deadline); |
ac2164d5 TH |
394 | |
395 | return 0; | |
396 | } | |
397 | ||
a55ab496 BH |
398 | static void vt6420_bmdma_start(struct ata_queued_cmd *qc) |
399 | { | |
400 | struct ata_port *ap = qc->ap; | |
401 | if ((qc->tf.command == ATA_CMD_PACKET) && | |
402 | (qc->scsicmd->sc_data_direction == DMA_TO_DEVICE)) { | |
403 | /* Prevents corruption on some ATAPI burners */ | |
404 | ata_sff_pause(ap); | |
405 | } | |
406 | ata_bmdma_start(qc); | |
407 | } | |
408 | ||
a0fcdc02 | 409 | static int vt6421_pata_cable_detect(struct ata_port *ap) |
d73f30e1 A |
410 | { |
411 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
412 | u8 tmp; | |
413 | ||
414 | pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp); | |
415 | if (tmp & 0x10) | |
a0fcdc02 JG |
416 | return ATA_CBL_PATA40; |
417 | return ATA_CBL_PATA80; | |
d73f30e1 A |
418 | } |
419 | ||
420 | static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev) | |
421 | { | |
422 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
423 | static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 }; | |
02d1d616 BH |
424 | pci_write_config_byte(pdev, PATA_PIO_TIMING - adev->devno, |
425 | pio_bits[adev->pio_mode - XFER_PIO_0]); | |
d73f30e1 A |
426 | } |
427 | ||
428 | static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev) | |
429 | { | |
430 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
431 | static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 }; | |
02d1d616 BH |
432 | pci_write_config_byte(pdev, PATA_UDMA_TIMING - adev->devno, |
433 | udma_bits[adev->dma_mode - XFER_UDMA_0]); | |
d73f30e1 A |
434 | } |
435 | ||
1da177e4 LT |
436 | static const unsigned int svia_bar_sizes[] = { |
437 | 8, 4, 8, 4, 16, 256 | |
438 | }; | |
439 | ||
440 | static const unsigned int vt6421_bar_sizes[] = { | |
441 | 16, 16, 16, 16, 32, 128 | |
442 | }; | |
443 | ||
5796d1c4 | 444 | static void __iomem *svia_scr_addr(void __iomem *addr, unsigned int port) |
1da177e4 LT |
445 | { |
446 | return addr + (port * 128); | |
447 | } | |
448 | ||
5796d1c4 | 449 | static void __iomem *vt6421_scr_addr(void __iomem *addr, unsigned int port) |
1da177e4 LT |
450 | { |
451 | return addr + (port * 64); | |
452 | } | |
453 | ||
eca25dca | 454 | static void vt6421_init_addrs(struct ata_port *ap) |
1da177e4 | 455 | { |
eca25dca TH |
456 | void __iomem * const * iomap = ap->host->iomap; |
457 | void __iomem *reg_addr = iomap[ap->port_no]; | |
458 | void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8); | |
459 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
460 | ||
461 | ioaddr->cmd_addr = reg_addr; | |
462 | ioaddr->altstatus_addr = | |
463 | ioaddr->ctl_addr = (void __iomem *) | |
0d5ff566 | 464 | ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS); |
eca25dca TH |
465 | ioaddr->bmdma_addr = bmdma_addr; |
466 | ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no); | |
1da177e4 | 467 | |
9363c382 | 468 | ata_sff_std_ports(ioaddr); |
cbcdd875 TH |
469 | |
470 | ata_port_pbar_desc(ap, ap->port_no, -1, "port"); | |
471 | ata_port_pbar_desc(ap, 4, ap->port_no * 8, "bmdma"); | |
1da177e4 LT |
472 | } |
473 | ||
eca25dca | 474 | static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) |
1da177e4 | 475 | { |
eca25dca TH |
476 | const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL }; |
477 | struct ata_host *host; | |
478 | int rc; | |
f20b16ff | 479 | |
98633258 OZ |
480 | if (vt6420_hotplug) { |
481 | ppi[0]->port_ops->scr_read = svia_scr_read; | |
482 | ppi[0]->port_ops->scr_write = svia_scr_write; | |
483 | } | |
484 | ||
1c5afdf7 | 485 | rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host); |
eca25dca TH |
486 | if (rc) |
487 | return rc; | |
488 | *r_host = host; | |
1da177e4 | 489 | |
eca25dca TH |
490 | rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME); |
491 | if (rc) { | |
a44fec1f | 492 | dev_err(&pdev->dev, "failed to iomap PCI BAR 5\n"); |
eca25dca | 493 | return rc; |
e1be5d73 TH |
494 | } |
495 | ||
eca25dca TH |
496 | host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0); |
497 | host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1); | |
1da177e4 | 498 | |
eca25dca | 499 | return 0; |
1da177e4 LT |
500 | } |
501 | ||
eca25dca | 502 | static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) |
1da177e4 | 503 | { |
eca25dca TH |
504 | const struct ata_port_info *ppi[] = |
505 | { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info }; | |
506 | struct ata_host *host; | |
507 | int i, rc; | |
508 | ||
509 | *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi)); | |
510 | if (!host) { | |
a44fec1f | 511 | dev_err(&pdev->dev, "failed to allocate host\n"); |
eca25dca TH |
512 | return -ENOMEM; |
513 | } | |
1da177e4 | 514 | |
8fd7d1b1 | 515 | rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME); |
eca25dca | 516 | if (rc) { |
a44fec1f JP |
517 | dev_err(&pdev->dev, "failed to request/iomap PCI BARs (errno=%d)\n", |
518 | rc); | |
eca25dca TH |
519 | return rc; |
520 | } | |
521 | host->iomap = pcim_iomap_table(pdev); | |
e1be5d73 | 522 | |
eca25dca TH |
523 | for (i = 0; i < host->n_ports; i++) |
524 | vt6421_init_addrs(host->ports[i]); | |
1da177e4 | 525 | |
c54c719b | 526 | rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK); |
eca25dca TH |
527 | if (rc) |
528 | return rc; | |
c54c719b | 529 | rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK); |
eca25dca TH |
530 | if (rc) |
531 | return rc; | |
532 | ||
533 | return 0; | |
1da177e4 LT |
534 | } |
535 | ||
b9d5b89b TH |
536 | static int vt8251_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) |
537 | { | |
538 | const struct ata_port_info *ppi[] = { &vt8251_port_info, NULL }; | |
539 | struct ata_host *host; | |
540 | int i, rc; | |
541 | ||
1c5afdf7 | 542 | rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host); |
b9d5b89b TH |
543 | if (rc) |
544 | return rc; | |
545 | *r_host = host; | |
546 | ||
547 | rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME); | |
548 | if (rc) { | |
a44fec1f | 549 | dev_err(&pdev->dev, "failed to iomap PCI BAR 5\n"); |
b9d5b89b TH |
550 | return rc; |
551 | } | |
552 | ||
553 | /* 8251 hosts four sata ports as M/S of the two channels */ | |
554 | for (i = 0; i < host->n_ports; i++) | |
555 | ata_slave_link_init(host->ports[i]); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
44a9b494 OZ |
560 | static void svia_wd_fix(struct pci_dev *pdev) |
561 | { | |
562 | u8 tmp8; | |
563 | ||
564 | pci_read_config_byte(pdev, 0x52, &tmp8); | |
565 | pci_write_config_byte(pdev, 0x52, tmp8 | BIT(2)); | |
566 | } | |
567 | ||
98633258 | 568 | static irqreturn_t vt642x_interrupt(int irq, void *dev_instance) |
57e5568f OZ |
569 | { |
570 | struct ata_host *host = dev_instance; | |
571 | irqreturn_t rc = ata_bmdma_interrupt(irq, dev_instance); | |
572 | ||
573 | /* if the IRQ was not handled, it might be a hotplug IRQ */ | |
574 | if (rc != IRQ_HANDLED) { | |
575 | u32 serror; | |
576 | unsigned long flags; | |
577 | ||
578 | spin_lock_irqsave(&host->lock, flags); | |
579 | /* check for hotplug on port 0 */ | |
580 | svia_scr_read(&host->ports[0]->link, SCR_ERROR, &serror); | |
581 | if (serror & SERR_PHYRDY_CHG) { | |
582 | ata_ehi_hotplugged(&host->ports[0]->link.eh_info); | |
583 | ata_port_freeze(host->ports[0]); | |
584 | rc = IRQ_HANDLED; | |
585 | } | |
586 | /* check for hotplug on port 1 */ | |
587 | svia_scr_read(&host->ports[1]->link, SCR_ERROR, &serror); | |
588 | if (serror & SERR_PHYRDY_CHG) { | |
589 | ata_ehi_hotplugged(&host->ports[1]->link.eh_info); | |
590 | ata_port_freeze(host->ports[1]); | |
591 | rc = IRQ_HANDLED; | |
592 | } | |
593 | spin_unlock_irqrestore(&host->lock, flags); | |
594 | } | |
595 | ||
596 | return rc; | |
597 | } | |
598 | ||
44a9b494 OZ |
599 | static void vt6421_error_handler(struct ata_port *ap) |
600 | { | |
601 | struct svia_priv *hpriv = ap->host->private_data; | |
602 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
603 | u32 serror; | |
604 | ||
605 | /* see svia_configure() for description */ | |
606 | if (!hpriv->wd_workaround) { | |
607 | svia_scr_read(&ap->link, SCR_ERROR, &serror); | |
608 | if (serror == 0x1000500) { | |
609 | ata_port_warn(ap, "Incompatible drive: enabling workaround. This slows down transfer rate to ~60 MB/s"); | |
610 | svia_wd_fix(pdev); | |
611 | hpriv->wd_workaround = true; | |
612 | ap->link.eh_context.i.flags |= ATA_EHI_QUIET; | |
613 | } | |
614 | } | |
615 | ||
616 | ata_sff_error_handler(ap); | |
617 | } | |
618 | ||
619 | static void svia_configure(struct pci_dev *pdev, int board_id, | |
620 | struct svia_priv *hpriv) | |
1da177e4 LT |
621 | { |
622 | u8 tmp8; | |
623 | ||
624 | pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8); | |
a44fec1f JP |
625 | dev_info(&pdev->dev, "routed to hard irq line %d\n", |
626 | (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f); | |
1da177e4 LT |
627 | |
628 | /* make sure SATA channels are enabled */ | |
629 | pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8); | |
630 | if ((tmp8 & ALL_PORTS) != ALL_PORTS) { | |
5b933e63 JP |
631 | dev_dbg(&pdev->dev, "enabling SATA channels (0x%x)\n", |
632 | (int)tmp8); | |
1da177e4 LT |
633 | tmp8 |= ALL_PORTS; |
634 | pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8); | |
635 | } | |
636 | ||
637 | /* make sure interrupts for each channel sent to us */ | |
638 | pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8); | |
639 | if ((tmp8 & ALL_PORTS) != ALL_PORTS) { | |
5b933e63 JP |
640 | dev_dbg(&pdev->dev, "enabling SATA channel interrupts (0x%x)\n", |
641 | (int) tmp8); | |
1da177e4 LT |
642 | tmp8 |= ALL_PORTS; |
643 | pci_write_config_byte(pdev, SATA_INT_GATE, tmp8); | |
644 | } | |
645 | ||
646 | /* make sure native mode is enabled */ | |
647 | pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8); | |
648 | if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) { | |
5b933e63 JP |
649 | dev_dbg(&pdev->dev, |
650 | "enabling SATA channel native mode (0x%x)\n", | |
651 | (int) tmp8); | |
1da177e4 LT |
652 | tmp8 |= NATIVE_MODE_ALL; |
653 | pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8); | |
654 | } | |
8b27ff4c | 655 | |
98633258 | 656 | if ((board_id == vt6420 && vt6420_hotplug) || board_id == vt6421) { |
3cf86452 OZ |
657 | /* enable IRQ on hotplug */ |
658 | pci_read_config_byte(pdev, SVIA_MISC_3, &tmp8); | |
659 | if ((tmp8 & SATA_HOTPLUG) != SATA_HOTPLUG) { | |
660 | dev_dbg(&pdev->dev, | |
661 | "enabling SATA hotplug (0x%x)\n", | |
662 | (int) tmp8); | |
663 | tmp8 |= SATA_HOTPLUG; | |
664 | pci_write_config_byte(pdev, SVIA_MISC_3, tmp8); | |
665 | } | |
57e5568f OZ |
666 | } |
667 | ||
8b27ff4c | 668 | /* |
b1353e4f | 669 | * vt6420/1 has problems talking to some drives. The following |
b475a3b8 TH |
670 | * is the fix from Joseph Chan <JosephChan@via.com.tw>. |
671 | * | |
672 | * When host issues HOLD, device may send up to 20DW of data | |
673 | * before acknowledging it with HOLDA and the host should be | |
674 | * able to buffer them in FIFO. Unfortunately, some WD drives | |
25985edc | 675 | * send up to 40DW before acknowledging HOLD and, in the |
b475a3b8 TH |
676 | * default configuration, this ends up overflowing vt6421's |
677 | * FIFO, making the controller abort the transaction with | |
678 | * R_ERR. | |
679 | * | |
680 | * Rx52[2] is the internal 128DW FIFO Flow control watermark | |
681 | * adjusting mechanism enable bit and the default value 0 | |
682 | * means host will issue HOLD to device when the left FIFO | |
683 | * size goes below 32DW. Setting it to 1 makes the watermark | |
684 | * 64DW. | |
8b27ff4c TH |
685 | * |
686 | * https://bugzilla.kernel.org/show_bug.cgi?id=15173 | |
b475a3b8 | 687 | * http://article.gmane.org/gmane.linux.ide/46352 |
b1353e4f | 688 | * http://thread.gmane.org/gmane.linux.kernel/1062139 |
44a9b494 OZ |
689 | * |
690 | * As the fix slows down data transfer, apply it only if the error | |
691 | * actually appears - see vt6421_error_handler() | |
692 | * Apply the fix always on vt6420 as we don't know if SCR_ERROR can be | |
693 | * read safely. | |
8b27ff4c | 694 | */ |
44a9b494 OZ |
695 | if (board_id == vt6420) { |
696 | svia_wd_fix(pdev); | |
697 | hpriv->wd_workaround = true; | |
8b27ff4c | 698 | } |
1da177e4 LT |
699 | } |
700 | ||
5796d1c4 | 701 | static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 | 702 | { |
1da177e4 LT |
703 | unsigned int i; |
704 | int rc; | |
f1c22943 | 705 | struct ata_host *host = NULL; |
1da177e4 | 706 | int board_id = (int) ent->driver_data; |
b4482a4b | 707 | const unsigned *bar_sizes; |
44a9b494 | 708 | struct svia_priv *hpriv; |
1da177e4 | 709 | |
06296a1e | 710 | ata_print_version_once(&pdev->dev, DRV_VERSION); |
1da177e4 | 711 | |
24dc5f33 | 712 | rc = pcim_enable_device(pdev); |
1da177e4 LT |
713 | if (rc) |
714 | return rc; | |
715 | ||
b9d5b89b | 716 | if (board_id == vt6421) |
1da177e4 | 717 | bar_sizes = &vt6421_bar_sizes[0]; |
b9d5b89b TH |
718 | else |
719 | bar_sizes = &svia_bar_sizes[0]; | |
1da177e4 LT |
720 | |
721 | for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++) | |
722 | if ((pci_resource_start(pdev, i) == 0) || | |
723 | (pci_resource_len(pdev, i) < bar_sizes[i])) { | |
a44fec1f | 724 | dev_err(&pdev->dev, |
e29419ff GKH |
725 | "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n", |
726 | i, | |
5796d1c4 JG |
727 | (unsigned long long)pci_resource_start(pdev, i), |
728 | (unsigned long long)pci_resource_len(pdev, i)); | |
24dc5f33 | 729 | return -ENODEV; |
1da177e4 LT |
730 | } |
731 | ||
b9d5b89b TH |
732 | switch (board_id) { |
733 | case vt6420: | |
eca25dca | 734 | rc = vt6420_prepare_host(pdev, &host); |
b9d5b89b TH |
735 | break; |
736 | case vt6421: | |
eca25dca | 737 | rc = vt6421_prepare_host(pdev, &host); |
b9d5b89b TH |
738 | break; |
739 | case vt8251: | |
740 | rc = vt8251_prepare_host(pdev, &host); | |
741 | break; | |
742 | default: | |
554d491d | 743 | rc = -EINVAL; |
b9d5b89b | 744 | } |
554d491d MS |
745 | if (rc) |
746 | return rc; | |
1da177e4 | 747 | |
44a9b494 OZ |
748 | hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); |
749 | if (!hpriv) | |
750 | return -ENOMEM; | |
751 | host->private_data = hpriv; | |
752 | ||
753 | svia_configure(pdev, board_id, hpriv); | |
1da177e4 LT |
754 | |
755 | pci_set_master(pdev); | |
98633258 OZ |
756 | if ((board_id == vt6420 && vt6420_hotplug) || board_id == vt6421) |
757 | return ata_host_activate(host, pdev->irq, vt642x_interrupt, | |
57e5568f OZ |
758 | IRQF_SHARED, &svia_sht); |
759 | else | |
760 | return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt, | |
761 | IRQF_SHARED, &svia_sht); | |
1da177e4 LT |
762 | } |
763 | ||
44a9b494 OZ |
764 | #ifdef CONFIG_PM_SLEEP |
765 | static int svia_pci_device_resume(struct pci_dev *pdev) | |
766 | { | |
767 | struct ata_host *host = pci_get_drvdata(pdev); | |
768 | struct svia_priv *hpriv = host->private_data; | |
769 | int rc; | |
770 | ||
771 | rc = ata_pci_device_do_resume(pdev); | |
772 | if (rc) | |
773 | return rc; | |
774 | ||
775 | if (hpriv->wd_workaround) | |
776 | svia_wd_fix(pdev); | |
777 | ata_host_resume(host); | |
778 | ||
779 | return 0; | |
780 | } | |
781 | #endif | |
782 | ||
2fc75da0 | 783 | module_pci_driver(svia_pci_driver); |