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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * sata_via.c - VIA Serial ATA controllers
3 *
Tejun Heo8c3d3d42013-05-14 11:09:50 -07004 * Maintained by: Tejun Heo <tj@kernel.org>
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04005 * Please ALWAYS copy linux-ide@vger.kernel.org
Jeff Garzik5796d1c2007-10-26 00:03:37 -04006 * on emails.
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04007 *
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',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available under NDA.
31 *
32 *
Jeff Garzikaf36d7f2005-08-28 20:18:39 -040033 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
36#include <linux/kernel.h>
37#include <linux/module.h>
38#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/blkdev.h>
40#include <linux/delay.h>
Jeff Garzika9524a72005-10-30 14:39:11 -050041#include <linux/device.h>
Bart Hartgersa55ab492010-02-14 13:04:50 +010042#include <scsi/scsi.h>
43#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <scsi/scsi_host.h>
45#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47#define DRV_NAME "sata_via"
Bart Hartgersa55ab492010-02-14 13:04:50 +010048#define DRV_VERSION "2.6"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Tejun Heob9d5b892008-10-22 00:46:36 +090050/*
51 * vt8251 is different from other sata controllers of VIA. It has two
52 * channels, each channel has both Master and Slave slot.
53 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070054enum board_ids_enum {
55 vt6420,
56 vt6421,
Tejun Heob9d5b892008-10-22 00:46:36 +090057 vt8251,
Linus Torvalds1da177e2005-04-16 15:20:36 -070058};
59
60enum {
61 SATA_CHAN_ENAB = 0x40, /* SATA channel enable */
62 SATA_INT_GATE = 0x41, /* SATA interrupt gating */
63 SATA_NATIVE_MODE = 0x42, /* Native mode enable */
Ondrej Zary57e55682016-02-25 17:22:25 +010064 SVIA_MISC_3 = 0x46, /* Miscellaneous Control III */
Aland73f30e2007-01-08 17:11:13 +000065 PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */
66 PATA_PIO_TIMING = 0xAB, /* PATA timing register */
Jeff Garzika84471f2007-02-26 05:51:33 -050067
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 PORT0 = (1 << 1),
69 PORT1 = (1 << 0),
70 ALL_PORTS = PORT0 | PORT1,
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
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 */
Ondrej Zary57e55682016-02-25 17:22:25 +010075
76 SATA_HOTPLUG = (1 << 5), /* enable IRQ on hotplug */
Linus Torvalds1da177e2005-04-16 15:20:36 -070077};
78
Ondrej Zary44a9b492016-02-20 12:01:53 +010079struct svia_priv {
80 bool wd_workaround;
81};
82
Jeff Garzik5796d1c2007-10-26 00:03:37 -040083static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
Ondrej Zary44a9b492016-02-20 12:01:53 +010084#ifdef CONFIG_PM_SLEEP
85static int svia_pci_device_resume(struct pci_dev *pdev);
86#endif
Tejun Heo82ef04f2008-07-31 17:02:40 +090087static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
88static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
Tejun Heob9d5b892008-10-22 00:46:36 +090089static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val);
90static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val);
Tejun Heob78152e2008-10-22 00:45:57 +090091static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
Tejun Heo17234242007-01-25 20:46:59 +090092static void svia_noop_freeze(struct ata_port *ap);
Tejun Heoa1efdab2008-03-25 12:22:50 +090093static int vt6420_prereset(struct ata_link *link, unsigned long deadline);
Bart Hartgersa55ab492010-02-14 13:04:50 +010094static void vt6420_bmdma_start(struct ata_queued_cmd *qc);
Jeff Garzika0fcdc02007-03-09 07:24:15 -050095static int vt6421_pata_cable_detect(struct ata_port *ap);
Aland73f30e2007-01-08 17:11:13 +000096static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
97static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);
Ondrej Zary44a9b492016-02-20 12:01:53 +010098static void vt6421_error_handler(struct ata_port *ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Jeff Garzik3b7d6972005-11-10 11:04:11 -0500100static const struct pci_device_id svia_pci_tbl[] = {
Luca Pedrielli96bc1032007-01-16 12:55:04 +0900101 { PCI_VDEVICE(VIA, 0x5337), vt6420 },
Tejun Heob9d5b892008-10-22 00:46:36 +0900102 { PCI_VDEVICE(VIA, 0x0591), vt6420 }, /* 2 sata chnls (Master) */
103 { PCI_VDEVICE(VIA, 0x3149), vt6420 }, /* 2 sata chnls (Master) */
104 { PCI_VDEVICE(VIA, 0x3249), vt6421 }, /* 2 sata chnls, 1 pata chnl */
Jeff Garzik52df0ee2007-05-25 05:02:06 -0400105 { PCI_VDEVICE(VIA, 0x5372), vt6420 },
106 { PCI_VDEVICE(VIA, 0x7372), vt6420 },
Tejun Heob9d5b892008-10-22 00:46:36 +0900107 { PCI_VDEVICE(VIA, 0x5287), vt8251 }, /* 2 sata chnls (Master/Slave) */
JosephChan@via.com.tw68139522009-01-16 19:44:55 +0800108 { PCI_VDEVICE(VIA, 0x9000), vt8251 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110 { } /* terminate list */
111};
112
113static struct pci_driver svia_pci_driver = {
114 .name = DRV_NAME,
115 .id_table = svia_pci_tbl,
116 .probe = svia_init_one,
Bartlomiej Zolnierkiewicz58eb8cd2014-05-07 17:17:44 +0200117#ifdef CONFIG_PM_SLEEP
Tejun Heoe1e143c2007-05-04 15:30:34 +0200118 .suspend = ata_pci_device_suspend,
Ondrej Zary44a9b492016-02-20 12:01:53 +0100119 .resume = svia_pci_device_resume,
Tejun Heoe1e143c2007-05-04 15:30:34 +0200120#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 .remove = ata_pci_remove_one,
122};
123
Jeff Garzik193515d2005-11-07 00:59:37 -0500124static struct scsi_host_template svia_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900125 ATA_BMDMA_SHT(DRV_NAME),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126};
127
Tejun Heob78152e2008-10-22 00:45:57 +0900128static struct ata_port_operations svia_base_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900129 .inherits = &ata_bmdma_port_ops,
Tejun Heob78152e2008-10-22 00:45:57 +0900130 .sff_tf_load = svia_tf_load,
131};
132
133static struct ata_port_operations vt6420_sata_ops = {
134 .inherits = &svia_base_ops,
Tejun Heo17234242007-01-25 20:46:59 +0900135 .freeze = svia_noop_freeze,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900136 .prereset = vt6420_prereset,
Bart Hartgersa55ab492010-02-14 13:04:50 +0100137 .bmdma_start = vt6420_bmdma_start,
Tejun Heoac2164d2006-08-23 01:00:27 +0900138};
139
Tejun Heo029cfd62008-03-25 12:22:49 +0900140static struct ata_port_operations vt6421_pata_ops = {
Tejun Heob78152e2008-10-22 00:45:57 +0900141 .inherits = &svia_base_ops,
Tejun Heo029cfd62008-03-25 12:22:49 +0900142 .cable_detect = vt6421_pata_cable_detect,
Aland73f30e2007-01-08 17:11:13 +0000143 .set_piomode = vt6421_set_pio_mode,
144 .set_dmamode = vt6421_set_dma_mode,
Aland73f30e2007-01-08 17:11:13 +0000145};
146
Tejun Heo029cfd62008-03-25 12:22:49 +0900147static struct ata_port_operations vt6421_sata_ops = {
Tejun Heob78152e2008-10-22 00:45:57 +0900148 .inherits = &svia_base_ops,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 .scr_read = svia_scr_read,
150 .scr_write = svia_scr_write,
Ondrej Zary44a9b492016-02-20 12:01:53 +0100151 .error_handler = vt6421_error_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152};
153
Tejun Heob9d5b892008-10-22 00:46:36 +0900154static struct ata_port_operations vt8251_ops = {
155 .inherits = &svia_base_ops,
156 .hardreset = sata_std_hardreset,
157 .scr_read = vt8251_scr_read,
158 .scr_write = vt8251_scr_write,
159};
160
Tejun Heoeca25dc2007-04-17 23:44:07 +0900161static const struct ata_port_info vt6420_port_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300162 .flags = ATA_FLAG_SATA,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100163 .pio_mask = ATA_PIO4,
164 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400165 .udma_mask = ATA_UDMA6,
Tejun Heoac2164d2006-08-23 01:00:27 +0900166 .port_ops = &vt6420_sata_ops,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167};
168
Tejun Heoeca25dc2007-04-17 23:44:07 +0900169static struct ata_port_info vt6421_sport_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300170 .flags = ATA_FLAG_SATA,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100171 .pio_mask = ATA_PIO4,
172 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400173 .udma_mask = ATA_UDMA6,
Tejun Heoeca25dc2007-04-17 23:44:07 +0900174 .port_ops = &vt6421_sata_ops,
175};
176
177static struct ata_port_info vt6421_pport_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300178 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100179 .pio_mask = ATA_PIO4,
180 /* No MWDMA */
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400181 .udma_mask = ATA_UDMA6,
Tejun Heoeca25dc2007-04-17 23:44:07 +0900182 .port_ops = &vt6421_pata_ops,
183};
184
Tejun Heob9d5b892008-10-22 00:46:36 +0900185static struct ata_port_info vt8251_port_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300186 .flags = ATA_FLAG_SATA | ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100187 .pio_mask = ATA_PIO4,
188 .mwdma_mask = ATA_MWDMA2,
Tejun Heob9d5b892008-10-22 00:46:36 +0900189 .udma_mask = ATA_UDMA6,
190 .port_ops = &vt8251_ops,
191};
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193MODULE_AUTHOR("Jeff Garzik");
194MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
195MODULE_LICENSE("GPL");
196MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
197MODULE_VERSION(DRV_VERSION);
198
Tejun Heo82ef04f2008-07-31 17:02:40 +0900199static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
201 if (sc_reg > SCR_CONTROL)
Tejun Heoda3dbb12007-07-16 14:29:40 +0900202 return -EINVAL;
Tejun Heo82ef04f2008-07-31 17:02:40 +0900203 *val = ioread32(link->ap->ioaddr.scr_addr + (4 * sc_reg));
Tejun Heoda3dbb12007-07-16 14:29:40 +0900204 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Tejun Heo82ef04f2008-07-31 17:02:40 +0900207static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
209 if (sc_reg > SCR_CONTROL)
Tejun Heoda3dbb12007-07-16 14:29:40 +0900210 return -EINVAL;
Tejun Heo82ef04f2008-07-31 17:02:40 +0900211 iowrite32(val, link->ap->ioaddr.scr_addr + (4 * sc_reg));
Tejun Heoda3dbb12007-07-16 14:29:40 +0900212 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213}
214
Tejun Heob9d5b892008-10-22 00:46:36 +0900215static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
216{
217 static const u8 ipm_tbl[] = { 1, 2, 6, 0 };
218 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
219 int slot = 2 * link->ap->port_no + link->pmp;
220 u32 v = 0;
221 u8 raw;
222
223 switch (scr) {
224 case SCR_STATUS:
225 pci_read_config_byte(pdev, 0xA0 + slot, &raw);
226
227 /* read the DET field, bit0 and 1 of the config byte */
228 v |= raw & 0x03;
229
230 /* read the SPD field, bit4 of the configure byte */
231 if (raw & (1 << 4))
232 v |= 0x02 << 4;
233 else
234 v |= 0x01 << 4;
235
236 /* read the IPM field, bit2 and 3 of the config byte */
237 v |= ipm_tbl[(raw >> 2) & 0x3];
238 break;
239
240 case SCR_ERROR:
241 /* devices other than 5287 uses 0xA8 as base */
242 WARN_ON(pdev->device != 0x5287);
243 pci_read_config_dword(pdev, 0xB0 + slot * 4, &v);
244 break;
245
246 case SCR_CONTROL:
247 pci_read_config_byte(pdev, 0xA4 + slot, &raw);
248
249 /* read the DET field, bit0 and bit1 */
250 v |= ((raw & 0x02) << 1) | (raw & 0x01);
251
252 /* read the IPM field, bit2 and bit3 */
253 v |= ((raw >> 2) & 0x03) << 8;
254 break;
255
256 default:
257 return -EINVAL;
258 }
259
260 *val = v;
261 return 0;
262}
263
264static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val)
265{
266 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
267 int slot = 2 * link->ap->port_no + link->pmp;
268 u32 v = 0;
269
270 switch (scr) {
271 case SCR_ERROR:
272 /* devices other than 5287 uses 0xA8 as base */
273 WARN_ON(pdev->device != 0x5287);
274 pci_write_config_dword(pdev, 0xB0 + slot * 4, val);
275 return 0;
276
277 case SCR_CONTROL:
278 /* set the DET field */
279 v |= ((val & 0x4) >> 1) | (val & 0x1);
280
281 /* set the IPM field */
282 v |= ((val >> 8) & 0x3) << 2;
283
284 pci_write_config_byte(pdev, 0xA4 + slot, v);
285 return 0;
286
287 default:
288 return -EINVAL;
289 }
290}
291
Tejun Heob78152e2008-10-22 00:45:57 +0900292/**
293 * svia_tf_load - send taskfile registers to host controller
294 * @ap: Port to which output is sent
295 * @tf: ATA taskfile register set
296 *
297 * Outputs ATA taskfile to standard ATA host controller.
298 *
299 * This is to fix the internal bug of via chipsets, which will
300 * reset the device register after changing the IEN bit on ctl
301 * register.
302 */
303static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
304{
305 struct ata_taskfile ttf;
306
307 if (tf->ctl != ap->last_ctl) {
308 ttf = *tf;
309 ttf.flags |= ATA_TFLAG_DEVICE;
310 tf = &ttf;
311 }
312 ata_sff_tf_load(ap, tf);
313}
314
Tejun Heo17234242007-01-25 20:46:59 +0900315static void svia_noop_freeze(struct ata_port *ap)
316{
317 /* Some VIA controllers choke if ATA_NIEN is manipulated in
318 * certain way. Leave it alone and just clear pending IRQ.
319 */
Tejun Heo5682ed32008-04-07 22:47:16 +0900320 ap->ops->sff_check_status(ap);
Tejun Heo37f65b82010-05-19 22:10:20 +0200321 ata_bmdma_irq_clear(ap);
Tejun Heo17234242007-01-25 20:46:59 +0900322}
323
Tejun Heoac2164d2006-08-23 01:00:27 +0900324/**
325 * vt6420_prereset - prereset for vt6420
Tejun Heocc0680a2007-08-06 18:36:23 +0900326 * @link: target ATA link
Tejun Heod4b2bab2007-02-02 16:50:52 +0900327 * @deadline: deadline jiffies for the operation
Tejun Heoac2164d2006-08-23 01:00:27 +0900328 *
329 * SCR registers on vt6420 are pieces of shit and may hang the
330 * whole machine completely if accessed with the wrong timing.
331 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
332 * access operations, but uses SStatus and SControl only during
333 * boot probing in controlled way.
334 *
335 * As the old (pre EH update) probing code is proven to work, we
336 * strictly follow the access pattern.
337 *
338 * LOCKING:
339 * Kernel thread context (may sleep)
340 *
341 * RETURNS:
342 * 0 on success, -errno otherwise.
343 */
Tejun Heocc0680a2007-08-06 18:36:23 +0900344static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heoac2164d2006-08-23 01:00:27 +0900345{
Tejun Heocc0680a2007-08-06 18:36:23 +0900346 struct ata_port *ap = link->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900347 struct ata_eh_context *ehc = &ap->link.eh_context;
Tejun Heoac2164d2006-08-23 01:00:27 +0900348 unsigned long timeout = jiffies + (HZ * 5);
349 u32 sstatus, scontrol;
350 int online;
351
352 /* don't do any SCR stuff if we're not loading */
Jeff Garzik68ff6e82006-11-08 07:46:02 -0500353 if (!(ap->pflags & ATA_PFLAG_LOADING))
Tejun Heoac2164d2006-08-23 01:00:27 +0900354 goto skip_scr;
355
Jeff Garzika09060f2007-05-28 08:17:06 -0400356 /* Resume phy. This is the old SATA resume sequence */
Tejun Heo82ef04f2008-07-31 17:02:40 +0900357 svia_scr_write(link, SCR_CONTROL, 0x300);
358 svia_scr_read(link, SCR_CONTROL, &scontrol); /* flush */
Tejun Heoac2164d2006-08-23 01:00:27 +0900359
360 /* wait for phy to become ready, if necessary */
361 do {
Tejun Heo97750ce2010-09-06 17:56:29 +0200362 ata_msleep(link->ap, 200);
Tejun Heo82ef04f2008-07-31 17:02:40 +0900363 svia_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heoda3dbb12007-07-16 14:29:40 +0900364 if ((sstatus & 0xf) != 1)
Tejun Heoac2164d2006-08-23 01:00:27 +0900365 break;
366 } while (time_before(jiffies, timeout));
367
368 /* open code sata_print_link_status() */
Tejun Heo82ef04f2008-07-31 17:02:40 +0900369 svia_scr_read(link, SCR_STATUS, &sstatus);
370 svia_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heoac2164d2006-08-23 01:00:27 +0900371
372 online = (sstatus & 0xf) == 0x3;
373
Joe Perchesa9a79df2011-04-15 15:51:59 -0700374 ata_port_info(ap,
375 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
376 online ? "up" : "down", sstatus, scontrol);
Tejun Heoac2164d2006-08-23 01:00:27 +0900377
378 /* SStatus is read one more time */
Tejun Heo82ef04f2008-07-31 17:02:40 +0900379 svia_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heoac2164d2006-08-23 01:00:27 +0900380
381 if (!online) {
382 /* tell EH to bail */
Tejun Heocf480622008-01-24 00:05:14 +0900383 ehc->i.action &= ~ATA_EH_RESET;
Tejun Heoac2164d2006-08-23 01:00:27 +0900384 return 0;
385 }
386
387 skip_scr:
388 /* wait for !BSY */
Tejun Heo705e76b2008-04-07 22:47:19 +0900389 ata_sff_wait_ready(link, deadline);
Tejun Heoac2164d2006-08-23 01:00:27 +0900390
391 return 0;
392}
393
Bart Hartgersa55ab492010-02-14 13:04:50 +0100394static void vt6420_bmdma_start(struct ata_queued_cmd *qc)
395{
396 struct ata_port *ap = qc->ap;
397 if ((qc->tf.command == ATA_CMD_PACKET) &&
398 (qc->scsicmd->sc_data_direction == DMA_TO_DEVICE)) {
399 /* Prevents corruption on some ATAPI burners */
400 ata_sff_pause(ap);
401 }
402 ata_bmdma_start(qc);
403}
404
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500405static int vt6421_pata_cable_detect(struct ata_port *ap)
Aland73f30e2007-01-08 17:11:13 +0000406{
407 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
408 u8 tmp;
409
410 pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
411 if (tmp & 0x10)
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500412 return ATA_CBL_PATA40;
413 return ATA_CBL_PATA80;
Aland73f30e2007-01-08 17:11:13 +0000414}
415
416static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
417{
418 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
419 static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
Bart Hartgers02d1d612010-01-17 00:56:54 +0100420 pci_write_config_byte(pdev, PATA_PIO_TIMING - adev->devno,
421 pio_bits[adev->pio_mode - XFER_PIO_0]);
Aland73f30e2007-01-08 17:11:13 +0000422}
423
424static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
425{
426 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
427 static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
Bart Hartgers02d1d612010-01-17 00:56:54 +0100428 pci_write_config_byte(pdev, PATA_UDMA_TIMING - adev->devno,
429 udma_bits[adev->dma_mode - XFER_UDMA_0]);
Aland73f30e2007-01-08 17:11:13 +0000430}
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432static const unsigned int svia_bar_sizes[] = {
433 8, 4, 8, 4, 16, 256
434};
435
436static const unsigned int vt6421_bar_sizes[] = {
437 16, 16, 16, 16, 32, 128
438};
439
Jeff Garzik5796d1c2007-10-26 00:03:37 -0400440static void __iomem *svia_scr_addr(void __iomem *addr, unsigned int port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441{
442 return addr + (port * 128);
443}
444
Jeff Garzik5796d1c2007-10-26 00:03:37 -0400445static void __iomem *vt6421_scr_addr(void __iomem *addr, unsigned int port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446{
447 return addr + (port * 64);
448}
449
Tejun Heoeca25dc2007-04-17 23:44:07 +0900450static void vt6421_init_addrs(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
Tejun Heoeca25dc2007-04-17 23:44:07 +0900452 void __iomem * const * iomap = ap->host->iomap;
453 void __iomem *reg_addr = iomap[ap->port_no];
454 void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8);
455 struct ata_ioports *ioaddr = &ap->ioaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Tejun Heoeca25dc2007-04-17 23:44:07 +0900457 ioaddr->cmd_addr = reg_addr;
458 ioaddr->altstatus_addr =
459 ioaddr->ctl_addr = (void __iomem *)
Tejun Heo0d5ff562007-02-01 15:06:36 +0900460 ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS);
Tejun Heoeca25dc2007-04-17 23:44:07 +0900461 ioaddr->bmdma_addr = bmdma_addr;
462 ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Tejun Heo9363c382008-04-07 22:47:16 +0900464 ata_sff_std_ports(ioaddr);
Tejun Heocbcdd872007-08-18 13:14:55 +0900465
466 ata_port_pbar_desc(ap, ap->port_no, -1, "port");
467 ata_port_pbar_desc(ap, 4, ap->port_no * 8, "bmdma");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468}
469
Tejun Heoeca25dc2007-04-17 23:44:07 +0900470static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Tejun Heoeca25dc2007-04-17 23:44:07 +0900472 const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL };
473 struct ata_host *host;
474 int rc;
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500475
Tejun Heo1c5afdf2010-05-19 22:10:22 +0200476 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
Tejun Heoeca25dc2007-04-17 23:44:07 +0900477 if (rc)
478 return rc;
479 *r_host = host;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Tejun Heoeca25dc2007-04-17 23:44:07 +0900481 rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
482 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700483 dev_err(&pdev->dev, "failed to iomap PCI BAR 5\n");
Tejun Heoeca25dc2007-04-17 23:44:07 +0900484 return rc;
Tejun Heoe1be5d72007-02-20 20:01:53 +0900485 }
486
Tejun Heoeca25dc2007-04-17 23:44:07 +0900487 host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0);
488 host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Tejun Heoeca25dc2007-04-17 23:44:07 +0900490 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491}
492
Tejun Heoeca25dc2007-04-17 23:44:07 +0900493static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494{
Tejun Heoeca25dc2007-04-17 23:44:07 +0900495 const struct ata_port_info *ppi[] =
496 { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info };
497 struct ata_host *host;
498 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Tejun Heoeca25dc2007-04-17 23:44:07 +0900500 *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi));
501 if (!host) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700502 dev_err(&pdev->dev, "failed to allocate host\n");
Tejun Heoeca25dc2007-04-17 23:44:07 +0900503 return -ENOMEM;
504 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Tejun Heo8fd7d1b2007-05-17 13:37:12 +0200506 rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
Tejun Heoeca25dc2007-04-17 23:44:07 +0900507 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700508 dev_err(&pdev->dev, "failed to request/iomap PCI BARs (errno=%d)\n",
509 rc);
Tejun Heoeca25dc2007-04-17 23:44:07 +0900510 return rc;
511 }
512 host->iomap = pcim_iomap_table(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Tejun Heoeca25dc2007-04-17 23:44:07 +0900514 for (i = 0; i < host->n_ports; i++)
515 vt6421_init_addrs(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Quentin Lambertc54c7192015-04-08 14:34:10 +0200517 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
Tejun Heoeca25dc2007-04-17 23:44:07 +0900518 if (rc)
519 return rc;
Quentin Lambertc54c7192015-04-08 14:34:10 +0200520 rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
Tejun Heoeca25dc2007-04-17 23:44:07 +0900521 if (rc)
522 return rc;
Tejun Heoe1be5d72007-02-20 20:01:53 +0900523
Tejun Heoeca25dc2007-04-17 23:44:07 +0900524 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525}
526
Tejun Heob9d5b892008-10-22 00:46:36 +0900527static int vt8251_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
528{
529 const struct ata_port_info *ppi[] = { &vt8251_port_info, NULL };
530 struct ata_host *host;
531 int i, rc;
532
Tejun Heo1c5afdf2010-05-19 22:10:22 +0200533 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
Tejun Heob9d5b892008-10-22 00:46:36 +0900534 if (rc)
535 return rc;
536 *r_host = host;
537
538 rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
539 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700540 dev_err(&pdev->dev, "failed to iomap PCI BAR 5\n");
Tejun Heob9d5b892008-10-22 00:46:36 +0900541 return rc;
542 }
543
544 /* 8251 hosts four sata ports as M/S of the two channels */
545 for (i = 0; i < host->n_ports; i++)
546 ata_slave_link_init(host->ports[i]);
547
548 return 0;
549}
550
Ondrej Zary44a9b492016-02-20 12:01:53 +0100551static void svia_wd_fix(struct pci_dev *pdev)
552{
553 u8 tmp8;
554
555 pci_read_config_byte(pdev, 0x52, &tmp8);
556 pci_write_config_byte(pdev, 0x52, tmp8 | BIT(2));
557}
558
Ondrej Zary57e55682016-02-25 17:22:25 +0100559static irqreturn_t vt6421_interrupt(int irq, void *dev_instance)
560{
561 struct ata_host *host = dev_instance;
562 irqreturn_t rc = ata_bmdma_interrupt(irq, dev_instance);
563
564 /* if the IRQ was not handled, it might be a hotplug IRQ */
565 if (rc != IRQ_HANDLED) {
566 u32 serror;
567 unsigned long flags;
568
569 spin_lock_irqsave(&host->lock, flags);
570 /* check for hotplug on port 0 */
571 svia_scr_read(&host->ports[0]->link, SCR_ERROR, &serror);
572 if (serror & SERR_PHYRDY_CHG) {
573 ata_ehi_hotplugged(&host->ports[0]->link.eh_info);
574 ata_port_freeze(host->ports[0]);
575 rc = IRQ_HANDLED;
576 }
577 /* check for hotplug on port 1 */
578 svia_scr_read(&host->ports[1]->link, SCR_ERROR, &serror);
579 if (serror & SERR_PHYRDY_CHG) {
580 ata_ehi_hotplugged(&host->ports[1]->link.eh_info);
581 ata_port_freeze(host->ports[1]);
582 rc = IRQ_HANDLED;
583 }
584 spin_unlock_irqrestore(&host->lock, flags);
585 }
586
587 return rc;
588}
589
Ondrej Zary44a9b492016-02-20 12:01:53 +0100590static void vt6421_error_handler(struct ata_port *ap)
591{
592 struct svia_priv *hpriv = ap->host->private_data;
593 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
594 u32 serror;
595
596 /* see svia_configure() for description */
597 if (!hpriv->wd_workaround) {
598 svia_scr_read(&ap->link, SCR_ERROR, &serror);
599 if (serror == 0x1000500) {
600 ata_port_warn(ap, "Incompatible drive: enabling workaround. This slows down transfer rate to ~60 MB/s");
601 svia_wd_fix(pdev);
602 hpriv->wd_workaround = true;
603 ap->link.eh_context.i.flags |= ATA_EHI_QUIET;
604 }
605 }
606
607 ata_sff_error_handler(ap);
608}
609
610static void svia_configure(struct pci_dev *pdev, int board_id,
611 struct svia_priv *hpriv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612{
613 u8 tmp8;
614
615 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
Joe Perchesa44fec12011-04-15 15:51:58 -0700616 dev_info(&pdev->dev, "routed to hard irq line %d\n",
617 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619 /* make sure SATA channels are enabled */
620 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
621 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
Joe Perches5b933e62011-04-15 15:52:01 -0700622 dev_dbg(&pdev->dev, "enabling SATA channels (0x%x)\n",
623 (int)tmp8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 tmp8 |= ALL_PORTS;
625 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
626 }
627
628 /* make sure interrupts for each channel sent to us */
629 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
630 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
Joe Perches5b933e62011-04-15 15:52:01 -0700631 dev_dbg(&pdev->dev, "enabling SATA channel interrupts (0x%x)\n",
632 (int) tmp8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 tmp8 |= ALL_PORTS;
634 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
635 }
636
637 /* make sure native mode is enabled */
638 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
639 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
Joe Perches5b933e62011-04-15 15:52:01 -0700640 dev_dbg(&pdev->dev,
641 "enabling SATA channel native mode (0x%x)\n",
642 (int) tmp8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 tmp8 |= NATIVE_MODE_ALL;
644 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
645 }
Tejun Heo8b27ff42010-05-31 16:26:48 +0200646
Ondrej Zary57e55682016-02-25 17:22:25 +0100647 /* enable IRQ on hotplug */
648 pci_read_config_byte(pdev, SVIA_MISC_3, &tmp8);
649 if ((tmp8 & SATA_HOTPLUG) != SATA_HOTPLUG) {
650 dev_dbg(&pdev->dev,
651 "enabling SATA hotplug (0x%x)\n",
652 (int) tmp8);
653 tmp8 |= SATA_HOTPLUG;
654 pci_write_config_byte(pdev, SVIA_MISC_3, tmp8);
655 }
656
Tejun Heo8b27ff42010-05-31 16:26:48 +0200657 /*
Tejun Heob1353e42010-11-19 15:29:19 +0100658 * vt6420/1 has problems talking to some drives. The following
Tejun Heob475a3b2010-06-03 11:35:03 +0200659 * is the fix from Joseph Chan <JosephChan@via.com.tw>.
660 *
661 * When host issues HOLD, device may send up to 20DW of data
662 * before acknowledging it with HOLDA and the host should be
663 * able to buffer them in FIFO. Unfortunately, some WD drives
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300664 * send up to 40DW before acknowledging HOLD and, in the
Tejun Heob475a3b2010-06-03 11:35:03 +0200665 * default configuration, this ends up overflowing vt6421's
666 * FIFO, making the controller abort the transaction with
667 * R_ERR.
668 *
669 * Rx52[2] is the internal 128DW FIFO Flow control watermark
670 * adjusting mechanism enable bit and the default value 0
671 * means host will issue HOLD to device when the left FIFO
672 * size goes below 32DW. Setting it to 1 makes the watermark
673 * 64DW.
Tejun Heo8b27ff42010-05-31 16:26:48 +0200674 *
675 * https://bugzilla.kernel.org/show_bug.cgi?id=15173
Tejun Heob475a3b2010-06-03 11:35:03 +0200676 * http://article.gmane.org/gmane.linux.ide/46352
Tejun Heob1353e42010-11-19 15:29:19 +0100677 * http://thread.gmane.org/gmane.linux.kernel/1062139
Ondrej Zary44a9b492016-02-20 12:01:53 +0100678 *
679 * As the fix slows down data transfer, apply it only if the error
680 * actually appears - see vt6421_error_handler()
681 * Apply the fix always on vt6420 as we don't know if SCR_ERROR can be
682 * read safely.
Tejun Heo8b27ff42010-05-31 16:26:48 +0200683 */
Ondrej Zary44a9b492016-02-20 12:01:53 +0100684 if (board_id == vt6420) {
685 svia_wd_fix(pdev);
686 hpriv->wd_workaround = true;
Tejun Heo8b27ff42010-05-31 16:26:48 +0200687 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688}
689
Jeff Garzik5796d1c2007-10-26 00:03:37 -0400690static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 unsigned int i;
693 int rc;
Jeff Garzikf1c22942009-04-13 04:09:34 -0400694 struct ata_host *host = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 int board_id = (int) ent->driver_data;
Al Virob4482a42007-10-14 19:35:40 +0100696 const unsigned *bar_sizes;
Ondrej Zary44a9b492016-02-20 12:01:53 +0100697 struct svia_priv *hpriv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
Joe Perches06296a12011-04-15 15:52:00 -0700699 ata_print_version_once(&pdev->dev, DRV_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Tejun Heo24dc5f32007-01-20 16:00:28 +0900701 rc = pcim_enable_device(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 if (rc)
703 return rc;
704
Tejun Heob9d5b892008-10-22 00:46:36 +0900705 if (board_id == vt6421)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 bar_sizes = &vt6421_bar_sizes[0];
Tejun Heob9d5b892008-10-22 00:46:36 +0900707 else
708 bar_sizes = &svia_bar_sizes[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
711 if ((pci_resource_start(pdev, i) == 0) ||
712 (pci_resource_len(pdev, i) < bar_sizes[i])) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700713 dev_err(&pdev->dev,
Greg Kroah-Hartmane29419f2006-06-12 15:20:16 -0700714 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
715 i,
Jeff Garzik5796d1c2007-10-26 00:03:37 -0400716 (unsigned long long)pci_resource_start(pdev, i),
717 (unsigned long long)pci_resource_len(pdev, i));
Tejun Heo24dc5f32007-01-20 16:00:28 +0900718 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 }
720
Tejun Heob9d5b892008-10-22 00:46:36 +0900721 switch (board_id) {
722 case vt6420:
Tejun Heoeca25dc2007-04-17 23:44:07 +0900723 rc = vt6420_prepare_host(pdev, &host);
Tejun Heob9d5b892008-10-22 00:46:36 +0900724 break;
725 case vt6421:
Tejun Heoeca25dc2007-04-17 23:44:07 +0900726 rc = vt6421_prepare_host(pdev, &host);
Tejun Heob9d5b892008-10-22 00:46:36 +0900727 break;
728 case vt8251:
729 rc = vt8251_prepare_host(pdev, &host);
730 break;
731 default:
Marcin Slusarz554d4912008-11-02 22:18:52 +0100732 rc = -EINVAL;
Tejun Heob9d5b892008-10-22 00:46:36 +0900733 }
Marcin Slusarz554d4912008-11-02 22:18:52 +0100734 if (rc)
735 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
Ondrej Zary44a9b492016-02-20 12:01:53 +0100737 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
738 if (!hpriv)
739 return -ENOMEM;
740 host->private_data = hpriv;
741
742 svia_configure(pdev, board_id, hpriv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
744 pci_set_master(pdev);
Ondrej Zary57e55682016-02-25 17:22:25 +0100745 if (board_id == vt6421)
746 return ata_host_activate(host, pdev->irq, vt6421_interrupt,
747 IRQF_SHARED, &svia_sht);
748 else
749 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
750 IRQF_SHARED, &svia_sht);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751}
752
Ondrej Zary44a9b492016-02-20 12:01:53 +0100753#ifdef CONFIG_PM_SLEEP
754static int svia_pci_device_resume(struct pci_dev *pdev)
755{
756 struct ata_host *host = pci_get_drvdata(pdev);
757 struct svia_priv *hpriv = host->private_data;
758 int rc;
759
760 rc = ata_pci_device_do_resume(pdev);
761 if (rc)
762 return rc;
763
764 if (hpriv->wd_workaround)
765 svia_wd_fix(pdev);
766 ata_host_resume(host);
767
768 return 0;
769}
770#endif
771
Axel Lin2fc75da2012-04-19 13:43:05 +0800772module_pci_driver(svia_pci_driver);