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[PATCH] hugetlb: fix size=4G parsing
[linux-2.6.22.y-op.git] / drivers / ata / sata_via.c
blobf4455a1efe2d6fa5cc7d14869b7494ad543bf11e
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 { PCI_VDEVICE(VIA, 0x0591), vt6420 },
81 { PCI_VDEVICE(VIA, 0x3149), vt6420 },
82 { PCI_VDEVICE(VIA, 0x3249), vt6421 },
83
84 { } /* terminate list */
85 };
86
87 static struct pci_driver svia_pci_driver = {
88 .name = DRV_NAME,
89 .id_table = svia_pci_tbl,
90 .probe = svia_init_one,
91 .remove = ata_pci_remove_one,
92 };
93
94 static struct scsi_host_template svia_sht = {
95 .module = THIS_MODULE,
96 .name = DRV_NAME,
97 .ioctl = ata_scsi_ioctl,
98 .queuecommand = ata_scsi_queuecmd,
99 .can_queue = ATA_DEF_QUEUE,
100 .this_id = ATA_SHT_THIS_ID,
101 .sg_tablesize = LIBATA_MAX_PRD,
102 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
103 .emulated = ATA_SHT_EMULATED,
104 .use_clustering = ATA_SHT_USE_CLUSTERING,
105 .proc_name = DRV_NAME,
106 .dma_boundary = ATA_DMA_BOUNDARY,
107 .slave_configure = ata_scsi_slave_config,
108 .slave_destroy = ata_scsi_slave_destroy,
109 .bios_param = ata_std_bios_param,
110 };
111
112 static const struct ata_port_operations vt6420_sata_ops = {
113 .port_disable = ata_port_disable,
114
115 .tf_load = ata_tf_load,
116 .tf_read = ata_tf_read,
117 .check_status = ata_check_status,
118 .exec_command = ata_exec_command,
119 .dev_select = ata_std_dev_select,
120
121 .bmdma_setup = ata_bmdma_setup,
122 .bmdma_start = ata_bmdma_start,
123 .bmdma_stop = ata_bmdma_stop,
124 .bmdma_status = ata_bmdma_status,
125
126 .qc_prep = ata_qc_prep,
127 .qc_issue = ata_qc_issue_prot,
128 .data_xfer = ata_pio_data_xfer,
129
130 .freeze = ata_bmdma_freeze,
131 .thaw = ata_bmdma_thaw,
132 .error_handler = vt6420_error_handler,
133 .post_internal_cmd = ata_bmdma_post_internal_cmd,
134
135 .irq_handler = ata_interrupt,
136 .irq_clear = ata_bmdma_irq_clear,
137
138 .port_start = ata_port_start,
139 .port_stop = ata_port_stop,
140 .host_stop = ata_host_stop,
141 };
142
143 static const struct ata_port_operations vt6421_sata_ops = {
144 .port_disable = ata_port_disable,
145
146 .tf_load = ata_tf_load,
147 .tf_read = ata_tf_read,
148 .check_status = ata_check_status,
149 .exec_command = ata_exec_command,
150 .dev_select = ata_std_dev_select,
151
152 .bmdma_setup = ata_bmdma_setup,
153 .bmdma_start = ata_bmdma_start,
154 .bmdma_stop = ata_bmdma_stop,
155 .bmdma_status = ata_bmdma_status,
156
157 .qc_prep = ata_qc_prep,
158 .qc_issue = ata_qc_issue_prot,
159 .data_xfer = ata_pio_data_xfer,
160
161 .freeze = ata_bmdma_freeze,
162 .thaw = ata_bmdma_thaw,
163 .error_handler = ata_bmdma_error_handler,
164 .post_internal_cmd = ata_bmdma_post_internal_cmd,
165
166 .irq_handler = ata_interrupt,
167 .irq_clear = ata_bmdma_irq_clear,
168
169 .scr_read = svia_scr_read,
170 .scr_write = svia_scr_write,
171
172 .port_start = ata_port_start,
173 .port_stop = ata_port_stop,
174 .host_stop = ata_host_stop,
175 };
176
177 static struct ata_port_info vt6420_port_info = {
178 .sht = &svia_sht,
179 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
180 .pio_mask = 0x1f,
181 .mwdma_mask = 0x07,
182 .udma_mask = 0x7f,
183 .port_ops = &vt6420_sata_ops,
184 };
185
186 MODULE_AUTHOR("Jeff Garzik");
187 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
188 MODULE_LICENSE("GPL");
189 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
190 MODULE_VERSION(DRV_VERSION);
191
192 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
193 {
194 if (sc_reg > SCR_CONTROL)
195 return 0xffffffffU;
196 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
197 }
198
199 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
200 {
201 if (sc_reg > SCR_CONTROL)
202 return;
203 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
204 }
205
206 /**
207 * vt6420_prereset - prereset for vt6420
208 * @ap: target ATA port
209 *
210 * SCR registers on vt6420 are pieces of shit and may hang the
211 * whole machine completely if accessed with the wrong timing.
212 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
213 * access operations, but uses SStatus and SControl only during
214 * boot probing in controlled way.
215 *
216 * As the old (pre EH update) probing code is proven to work, we
217 * strictly follow the access pattern.
218 *
219 * LOCKING:
220 * Kernel thread context (may sleep)
221 *
222 * RETURNS:
223 * 0 on success, -errno otherwise.
224 */
225 static int vt6420_prereset(struct ata_port *ap)
226 {
227 struct ata_eh_context *ehc = &ap->eh_context;
228 unsigned long timeout = jiffies + (HZ * 5);
229 u32 sstatus, scontrol;
230 int online;
231
232 /* don't do any SCR stuff if we're not loading */
233 if (!ATA_PFLAG_LOADING)
234 goto skip_scr;
235
236 /* Resume phy. This is the old resume sequence from
237 * __sata_phy_reset().
238 */
239 svia_scr_write(ap, SCR_CONTROL, 0x300);
240 svia_scr_read(ap, SCR_CONTROL); /* flush */
241
242 /* wait for phy to become ready, if necessary */
243 do {
244 msleep(200);
245 if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
246 break;
247 } while (time_before(jiffies, timeout));
248
249 /* open code sata_print_link_status() */
250 sstatus = svia_scr_read(ap, SCR_STATUS);
251 scontrol = svia_scr_read(ap, SCR_CONTROL);
252
253 online = (sstatus & 0xf) == 0x3;
254
255 ata_port_printk(ap, KERN_INFO,
256 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
257 online ? "up" : "down", sstatus, scontrol);
258
259 /* SStatus is read one more time */
260 svia_scr_read(ap, SCR_STATUS);
261
262 if (!online) {
263 /* tell EH to bail */
264 ehc->i.action &= ~ATA_EH_RESET_MASK;
265 return 0;
266 }
267
268 skip_scr:
269 /* wait for !BSY */
270 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
271
272 return 0;
273 }
274
275 static void vt6420_error_handler(struct ata_port *ap)
276 {
277 return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
278 NULL, ata_std_postreset);
279 }
280
281 static const unsigned int svia_bar_sizes[] = {
282 8, 4, 8, 4, 16, 256
283 };
284
285 static const unsigned int vt6421_bar_sizes[] = {
286 16, 16, 16, 16, 32, 128
287 };
288
289 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
290 {
291 return addr + (port * 128);
292 }
293
294 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
295 {
296 return addr + (port * 64);
297 }
298
299 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
300 struct pci_dev *pdev,
301 unsigned int port)
302 {
303 unsigned long reg_addr = pci_resource_start(pdev, port);
304 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
305 unsigned long scr_addr;
306
307 probe_ent->port[port].cmd_addr = reg_addr;
308 probe_ent->port[port].altstatus_addr =
309 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
310 probe_ent->port[port].bmdma_addr = bmdma_addr;
311
312 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
313 probe_ent->port[port].scr_addr = scr_addr;
314
315 ata_std_ports(&probe_ent->port[port]);
316 }
317
318 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
319 {
320 struct ata_probe_ent *probe_ent;
321 struct ata_port_info *ppi[2];
322
323 ppi[0] = ppi[1] = &vt6420_port_info;
324 probe_ent = ata_pci_init_native_mode(pdev, ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
325 if (!probe_ent)
326 return NULL;
327
328 probe_ent->port[0].scr_addr =
329 svia_scr_addr(pci_resource_start(pdev, 5), 0);
330 probe_ent->port[1].scr_addr =
331 svia_scr_addr(pci_resource_start(pdev, 5), 1);
332
333 return probe_ent;
334 }
335
336 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
337 {
338 struct ata_probe_ent *probe_ent;
339 unsigned int i;
340
341 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
342 if (!probe_ent)
343 return NULL;
344
345 memset(probe_ent, 0, sizeof(*probe_ent));
346 probe_ent->dev = pci_dev_to_dev(pdev);
347 INIT_LIST_HEAD(&probe_ent->node);
348
349 probe_ent->sht = &svia_sht;
350 probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
351 probe_ent->port_ops = &vt6421_sata_ops;
352 probe_ent->n_ports = N_PORTS;
353 probe_ent->irq = pdev->irq;
354 probe_ent->irq_flags = IRQF_SHARED;
355 probe_ent->pio_mask = 0x1f;
356 probe_ent->mwdma_mask = 0x07;
357 probe_ent->udma_mask = 0x7f;
358
359 for (i = 0; i < N_PORTS; i++)
360 vt6421_init_addrs(probe_ent, pdev, i);
361
362 return probe_ent;
363 }
364
365 static void svia_configure(struct pci_dev *pdev)
366 {
367 u8 tmp8;
368
369 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
370 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
371 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
372
373 /* make sure SATA channels are enabled */
374 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
375 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
376 dev_printk(KERN_DEBUG, &pdev->dev,
377 "enabling SATA channels (0x%x)\n",
378 (int) tmp8);
379 tmp8 |= ALL_PORTS;
380 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
381 }
382
383 /* make sure interrupts for each channel sent to us */
384 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
385 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
386 dev_printk(KERN_DEBUG, &pdev->dev,
387 "enabling SATA channel interrupts (0x%x)\n",
388 (int) tmp8);
389 tmp8 |= ALL_PORTS;
390 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
391 }
392
393 /* make sure native mode is enabled */
394 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
395 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
396 dev_printk(KERN_DEBUG, &pdev->dev,
397 "enabling SATA channel native mode (0x%x)\n",
398 (int) tmp8);
399 tmp8 |= NATIVE_MODE_ALL;
400 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
401 }
402 }
403
404 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
405 {
406 static int printed_version;
407 unsigned int i;
408 int rc;
409 struct ata_probe_ent *probe_ent;
410 int board_id = (int) ent->driver_data;
411 const int *bar_sizes;
412 int pci_dev_busy = 0;
413 u8 tmp8;
414
415 if (!printed_version++)
416 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
417
418 rc = pci_enable_device(pdev);
419 if (rc)
420 return rc;
421
422 rc = pci_request_regions(pdev, DRV_NAME);
423 if (rc) {
424 pci_dev_busy = 1;
425 goto err_out;
426 }
427
428 if (board_id == vt6420) {
429 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
430 if (tmp8 & SATA_2DEV) {
431 dev_printk(KERN_ERR, &pdev->dev,
432 "SATA master/slave not supported (0x%x)\n",
433 (int) tmp8);
434 rc = -EIO;
435 goto err_out_regions;
436 }
437
438 bar_sizes = &svia_bar_sizes[0];
439 } else {
440 bar_sizes = &vt6421_bar_sizes[0];
441 }
442
443 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
444 if ((pci_resource_start(pdev, i) == 0) ||
445 (pci_resource_len(pdev, i) < bar_sizes[i])) {
446 dev_printk(KERN_ERR, &pdev->dev,
447 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
448 i,
449 (unsigned long long)pci_resource_start(pdev, i),
450 (unsigned long long)pci_resource_len(pdev, i));
451 rc = -ENODEV;
452 goto err_out_regions;
453 }
454
455 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
456 if (rc)
457 goto err_out_regions;
458 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
459 if (rc)
460 goto err_out_regions;
461
462 if (board_id == vt6420)
463 probe_ent = vt6420_init_probe_ent(pdev);
464 else
465 probe_ent = vt6421_init_probe_ent(pdev);
466
467 if (!probe_ent) {
468 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
469 rc = -ENOMEM;
470 goto err_out_regions;
471 }
472
473 svia_configure(pdev);
474
475 pci_set_master(pdev);
476
477 /* FIXME: check ata_device_add return value */
478 ata_device_add(probe_ent);
479 kfree(probe_ent);
480
481 return 0;
482
483 err_out_regions:
484 pci_release_regions(pdev);
485 err_out:
486 if (!pci_dev_busy)
487 pci_disable_device(pdev);
488 return rc;
489 }
490
491 static int __init svia_init(void)
492 {
493 return pci_register_driver(&svia_pci_driver);
494 }
495
496 static void __exit svia_exit(void)
497 {
498 pci_unregister_driver(&svia_pci_driver);
499 }
500
501 module_init(svia_init);
502 module_exit(svia_exit);
503
linux v2.6.22.y-op