?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[SERIAL] Support for Intashield 2 port PCI serial card
[linux-2.6/verdex.git] / drivers / scsi / sata_via.c
blob01d40369a8a52d080e5b61be93f0158a896d1420
1 /*
2 * sata_via.c - VIA Serial ATA controllers
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 on emails.
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',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available under NDA.
31 *
32 *
33 * To-do list:
34 * - VT6421 PATA support
35 *
36 */
37
38 #include <linux/kernel.h>
39 #include <linux/module.h>
40 #include <linux/pci.h>
41 #include <linux/init.h>
42 #include <linux/blkdev.h>
43 #include <linux/delay.h>
44 #include <linux/device.h>
45 #include <scsi/scsi_host.h>
46 #include <linux/libata.h>
47 #include <asm/io.h>
48
49 #define DRV_NAME "sata_via"
50 #define DRV_VERSION "2.0"
51
52 enum board_ids_enum {
53 vt6420,
54 vt6421,
55 };
56
57 enum {
58 SATA_CHAN_ENAB = 0x40, /* SATA channel enable */
59 SATA_INT_GATE = 0x41, /* SATA interrupt gating */
60 SATA_NATIVE_MODE = 0x42, /* Native mode enable */
61 SATA_PATA_SHARING = 0x49, /* PATA/SATA sharing func ctrl */
62
63 PORT0 = (1 << 1),
64 PORT1 = (1 << 0),
65 ALL_PORTS = PORT0 | PORT1,
66 N_PORTS = 2,
67
68 NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
69
70 SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */
71 SATA_2DEV = (1 << 5), /* SATA is master/slave */
72 };
73
74 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
75 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
76 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
77 static void vt6420_error_handler(struct ata_port *ap);
78
79 static const struct pci_device_id svia_pci_tbl[] = {
80 { 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
81 { 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },
82
83 { } /* terminate list */
84 };
85
86 static struct pci_driver svia_pci_driver = {
87 .name = DRV_NAME,
88 .id_table = svia_pci_tbl,
89 .probe = svia_init_one,
90 .remove = ata_pci_remove_one,
91 };
92
93 static struct scsi_host_template svia_sht = {
94 .module = THIS_MODULE,
95 .name = DRV_NAME,
96 .ioctl = ata_scsi_ioctl,
97 .queuecommand = ata_scsi_queuecmd,
98 .can_queue = ATA_DEF_QUEUE,
99 .this_id = ATA_SHT_THIS_ID,
100 .sg_tablesize = LIBATA_MAX_PRD,
101 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
102 .emulated = ATA_SHT_EMULATED,
103 .use_clustering = ATA_SHT_USE_CLUSTERING,
104 .proc_name = DRV_NAME,
105 .dma_boundary = ATA_DMA_BOUNDARY,
106 .slave_configure = ata_scsi_slave_config,
107 .slave_destroy = ata_scsi_slave_destroy,
108 .bios_param = ata_std_bios_param,
109 };
110
111 static const struct ata_port_operations vt6420_sata_ops = {
112 .port_disable = ata_port_disable,
113
114 .tf_load = ata_tf_load,
115 .tf_read = ata_tf_read,
116 .check_status = ata_check_status,
117 .exec_command = ata_exec_command,
118 .dev_select = ata_std_dev_select,
119
120 .bmdma_setup = ata_bmdma_setup,
121 .bmdma_start = ata_bmdma_start,
122 .bmdma_stop = ata_bmdma_stop,
123 .bmdma_status = ata_bmdma_status,
124
125 .qc_prep = ata_qc_prep,
126 .qc_issue = ata_qc_issue_prot,
127 .data_xfer = ata_pio_data_xfer,
128
129 .freeze = ata_bmdma_freeze,
130 .thaw = ata_bmdma_thaw,
131 .error_handler = vt6420_error_handler,
132 .post_internal_cmd = ata_bmdma_post_internal_cmd,
133
134 .irq_handler = ata_interrupt,
135 .irq_clear = ata_bmdma_irq_clear,
136
137 .port_start = ata_port_start,
138 .port_stop = ata_port_stop,
139 .host_stop = ata_host_stop,
140 };
141
142 static const struct ata_port_operations vt6421_sata_ops = {
143 .port_disable = ata_port_disable,
144
145 .tf_load = ata_tf_load,
146 .tf_read = ata_tf_read,
147 .check_status = ata_check_status,
148 .exec_command = ata_exec_command,
149 .dev_select = ata_std_dev_select,
150
151 .bmdma_setup = ata_bmdma_setup,
152 .bmdma_start = ata_bmdma_start,
153 .bmdma_stop = ata_bmdma_stop,
154 .bmdma_status = ata_bmdma_status,
155
156 .qc_prep = ata_qc_prep,
157 .qc_issue = ata_qc_issue_prot,
158 .data_xfer = ata_pio_data_xfer,
159
160 .freeze = ata_bmdma_freeze,
161 .thaw = ata_bmdma_thaw,
162 .error_handler = ata_bmdma_error_handler,
163 .post_internal_cmd = ata_bmdma_post_internal_cmd,
164
165 .irq_handler = ata_interrupt,
166 .irq_clear = ata_bmdma_irq_clear,
167
168 .scr_read = svia_scr_read,
169 .scr_write = svia_scr_write,
170
171 .port_start = ata_port_start,
172 .port_stop = ata_port_stop,
173 .host_stop = ata_host_stop,
174 };
175
176 static struct ata_port_info vt6420_port_info = {
177 .sht = &svia_sht,
178 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
179 .pio_mask = 0x1f,
180 .mwdma_mask = 0x07,
181 .udma_mask = 0x7f,
182 .port_ops = &vt6420_sata_ops,
183 };
184
185 MODULE_AUTHOR("Jeff Garzik");
186 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
187 MODULE_LICENSE("GPL");
188 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
189 MODULE_VERSION(DRV_VERSION);
190
191 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
192 {
193 if (sc_reg > SCR_CONTROL)
194 return 0xffffffffU;
195 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
196 }
197
198 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
199 {
200 if (sc_reg > SCR_CONTROL)
201 return;
202 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
203 }
204
205 /**
206 * vt6420_prereset - prereset for vt6420
207 * @ap: target ATA port
208 *
209 * SCR registers on vt6420 are pieces of shit and may hang the
210 * whole machine completely if accessed with the wrong timing.
211 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
212 * access operations, but uses SStatus and SControl only during
213 * boot probing in controlled way.
214 *
215 * As the old (pre EH update) probing code is proven to work, we
216 * strictly follow the access pattern.
217 *
218 * LOCKING:
219 * Kernel thread context (may sleep)
220 *
221 * RETURNS:
222 * 0 on success, -errno otherwise.
223 */
224 static int vt6420_prereset(struct ata_port *ap)
225 {
226 struct ata_eh_context *ehc = &ap->eh_context;
227 unsigned long timeout = jiffies + (HZ * 5);
228 u32 sstatus, scontrol;
229 int online;
230
231 /* don't do any SCR stuff if we're not loading */
232 if (!ATA_PFLAG_LOADING)
233 goto skip_scr;
234
235 /* Resume phy. This is the old resume sequence from
236 * __sata_phy_reset().
237 */
238 svia_scr_write(ap, SCR_CONTROL, 0x300);
239 svia_scr_read(ap, SCR_CONTROL); /* flush */
240
241 /* wait for phy to become ready, if necessary */
242 do {
243 msleep(200);
244 if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
245 break;
246 } while (time_before(jiffies, timeout));
247
248 /* open code sata_print_link_status() */
249 sstatus = svia_scr_read(ap, SCR_STATUS);
250 scontrol = svia_scr_read(ap, SCR_CONTROL);
251
252 online = (sstatus & 0xf) == 0x3;
253
254 ata_port_printk(ap, KERN_INFO,
255 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
256 online ? "up" : "down", sstatus, scontrol);
257
258 /* SStatus is read one more time */
259 svia_scr_read(ap, SCR_STATUS);
260
261 if (!online) {
262 /* tell EH to bail */
263 ehc->i.action &= ~ATA_EH_RESET_MASK;
264 return 0;
265 }
266
267 skip_scr:
268 /* wait for !BSY */
269 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
270
271 return 0;
272 }
273
274 static void vt6420_error_handler(struct ata_port *ap)
275 {
276 return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
277 NULL, ata_std_postreset);
278 }
279
280 static const unsigned int svia_bar_sizes[] = {
281 8, 4, 8, 4, 16, 256
282 };
283
284 static const unsigned int vt6421_bar_sizes[] = {
285 16, 16, 16, 16, 32, 128
286 };
287
288 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
289 {
290 return addr + (port * 128);
291 }
292
293 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
294 {
295 return addr + (port * 64);
296 }
297
298 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
299 struct pci_dev *pdev,
300 unsigned int port)
301 {
302 unsigned long reg_addr = pci_resource_start(pdev, port);
303 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
304 unsigned long scr_addr;
305
306 probe_ent->port[port].cmd_addr = reg_addr;
307 probe_ent->port[port].altstatus_addr =
308 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
309 probe_ent->port[port].bmdma_addr = bmdma_addr;
310
311 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
312 probe_ent->port[port].scr_addr = scr_addr;
313
314 ata_std_ports(&probe_ent->port[port]);
315 }
316
317 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
318 {
319 struct ata_probe_ent *probe_ent;
320 struct ata_port_info *ppi = &vt6420_port_info;
321
322 probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
323 if (!probe_ent)
324 return NULL;
325
326 probe_ent->port[0].scr_addr =
327 svia_scr_addr(pci_resource_start(pdev, 5), 0);
328 probe_ent->port[1].scr_addr =
329 svia_scr_addr(pci_resource_start(pdev, 5), 1);
330
331 return probe_ent;
332 }
333
334 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
335 {
336 struct ata_probe_ent *probe_ent;
337 unsigned int i;
338
339 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
340 if (!probe_ent)
341 return NULL;
342
343 memset(probe_ent, 0, sizeof(*probe_ent));
344 probe_ent->dev = pci_dev_to_dev(pdev);
345 INIT_LIST_HEAD(&probe_ent->node);
346
347 probe_ent->sht = &svia_sht;
348 probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
349 probe_ent->port_ops = &vt6421_sata_ops;
350 probe_ent->n_ports = N_PORTS;
351 probe_ent->irq = pdev->irq;
352 probe_ent->irq_flags = IRQF_SHARED;
353 probe_ent->pio_mask = 0x1f;
354 probe_ent->mwdma_mask = 0x07;
355 probe_ent->udma_mask = 0x7f;
356
357 for (i = 0; i < N_PORTS; i++)
358 vt6421_init_addrs(probe_ent, pdev, i);
359
360 return probe_ent;
361 }
362
363 static void svia_configure(struct pci_dev *pdev)
364 {
365 u8 tmp8;
366
367 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
368 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
369 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
370
371 /* make sure SATA channels are enabled */
372 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
373 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
374 dev_printk(KERN_DEBUG, &pdev->dev,
375 "enabling SATA channels (0x%x)\n",
376 (int) tmp8);
377 tmp8 |= ALL_PORTS;
378 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
379 }
380
381 /* make sure interrupts for each channel sent to us */
382 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
383 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
384 dev_printk(KERN_DEBUG, &pdev->dev,
385 "enabling SATA channel interrupts (0x%x)\n",
386 (int) tmp8);
387 tmp8 |= ALL_PORTS;
388 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
389 }
390
391 /* make sure native mode is enabled */
392 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
393 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
394 dev_printk(KERN_DEBUG, &pdev->dev,
395 "enabling SATA channel native mode (0x%x)\n",
396 (int) tmp8);
397 tmp8 |= NATIVE_MODE_ALL;
398 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
399 }
400 }
401
402 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
403 {
404 static int printed_version;
405 unsigned int i;
406 int rc;
407 struct ata_probe_ent *probe_ent;
408 int board_id = (int) ent->driver_data;
409 const int *bar_sizes;
410 int pci_dev_busy = 0;
411 u8 tmp8;
412
413 if (!printed_version++)
414 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
415
416 rc = pci_enable_device(pdev);
417 if (rc)
418 return rc;
419
420 rc = pci_request_regions(pdev, DRV_NAME);
421 if (rc) {
422 pci_dev_busy = 1;
423 goto err_out;
424 }
425
426 if (board_id == vt6420) {
427 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
428 if (tmp8 & SATA_2DEV) {
429 dev_printk(KERN_ERR, &pdev->dev,
430 "SATA master/slave not supported (0x%x)\n",
431 (int) tmp8);
432 rc = -EIO;
433 goto err_out_regions;
434 }
435
436 bar_sizes = &svia_bar_sizes[0];
437 } else {
438 bar_sizes = &vt6421_bar_sizes[0];
439 }
440
441 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
442 if ((pci_resource_start(pdev, i) == 0) ||
443 (pci_resource_len(pdev, i) < bar_sizes[i])) {
444 dev_printk(KERN_ERR, &pdev->dev,
445 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
446 i,
447 (unsigned long long)pci_resource_start(pdev, i),
448 (unsigned long long)pci_resource_len(pdev, i));
449 rc = -ENODEV;
450 goto err_out_regions;
451 }
452
453 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
454 if (rc)
455 goto err_out_regions;
456 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
457 if (rc)
458 goto err_out_regions;
459
460 if (board_id == vt6420)
461 probe_ent = vt6420_init_probe_ent(pdev);
462 else
463 probe_ent = vt6421_init_probe_ent(pdev);
464
465 if (!probe_ent) {
466 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
467 rc = -ENOMEM;
468 goto err_out_regions;
469 }
470
471 svia_configure(pdev);
472
473 pci_set_master(pdev);
474
475 /* FIXME: check ata_device_add return value */
476 ata_device_add(probe_ent);
477 kfree(probe_ent);
478
479 return 0;
480
481 err_out_regions:
482 pci_release_regions(pdev);
483 err_out:
484 if (!pci_dev_busy)
485 pci_disable_device(pdev);
486 return rc;
487 }
488
489 static int __init svia_init(void)
490 {
491 return pci_module_init(&svia_pci_driver);
492 }
493
494 static void __exit svia_exit(void)
495 {
496 pci_unregister_driver(&svia_pci_driver);
497 }
498
499 module_init(svia_init);
500 module_exit(svia_exit);
501
Verdex Pro support