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Merge branch 'upstream-linus' of git://oss.oracle.com/home/sourcebo/git/ocfs2
[linux-2.6/verdex.git] / drivers / scsi / sata_via.c
blob6d5b0a794cfdf056e9abcf4272cca7709b9cba2a
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 "1.1"
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
78 static const struct pci_device_id svia_pci_tbl[] = {
79 { 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
80 { 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },
81
82 { } /* terminate list */
83 };
84
85 static struct pci_driver svia_pci_driver = {
86 .name = DRV_NAME,
87 .id_table = svia_pci_tbl,
88 .probe = svia_init_one,
89 .remove = ata_pci_remove_one,
90 };
91
92 static struct scsi_host_template svia_sht = {
93 .module = THIS_MODULE,
94 .name = DRV_NAME,
95 .ioctl = ata_scsi_ioctl,
96 .queuecommand = ata_scsi_queuecmd,
97 .eh_strategy_handler = ata_scsi_error,
98 .can_queue = ATA_DEF_QUEUE,
99 .this_id = ATA_SHT_THIS_ID,
100 .sg_tablesize = LIBATA_MAX_PRD,
101 .max_sectors = ATA_MAX_SECTORS,
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 .bios_param = ata_std_bios_param,
109 };
110
111 static const struct ata_port_operations svia_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 .phy_reset = sata_phy_reset,
121
122 .bmdma_setup = ata_bmdma_setup,
123 .bmdma_start = ata_bmdma_start,
124 .bmdma_stop = ata_bmdma_stop,
125 .bmdma_status = ata_bmdma_status,
126
127 .qc_prep = ata_qc_prep,
128 .qc_issue = ata_qc_issue_prot,
129
130 .eng_timeout = ata_eng_timeout,
131
132 .irq_handler = ata_interrupt,
133 .irq_clear = ata_bmdma_irq_clear,
134
135 .scr_read = svia_scr_read,
136 .scr_write = svia_scr_write,
137
138 .port_start = ata_port_start,
139 .port_stop = ata_port_stop,
140 .host_stop = ata_host_stop,
141 };
142
143 static struct ata_port_info svia_port_info = {
144 .sht = &svia_sht,
145 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | ATA_FLAG_NO_LEGACY,
146 .pio_mask = 0x1f,
147 .mwdma_mask = 0x07,
148 .udma_mask = 0x7f,
149 .port_ops = &svia_sata_ops,
150 };
151
152 MODULE_AUTHOR("Jeff Garzik");
153 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
154 MODULE_LICENSE("GPL");
155 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
156 MODULE_VERSION(DRV_VERSION);
157
158 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
159 {
160 if (sc_reg > SCR_CONTROL)
161 return 0xffffffffU;
162 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
163 }
164
165 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
166 {
167 if (sc_reg > SCR_CONTROL)
168 return;
169 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
170 }
171
172 static const unsigned int svia_bar_sizes[] = {
173 8, 4, 8, 4, 16, 256
174 };
175
176 static const unsigned int vt6421_bar_sizes[] = {
177 16, 16, 16, 16, 32, 128
178 };
179
180 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
181 {
182 return addr + (port * 128);
183 }
184
185 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
186 {
187 return addr + (port * 64);
188 }
189
190 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
191 struct pci_dev *pdev,
192 unsigned int port)
193 {
194 unsigned long reg_addr = pci_resource_start(pdev, port);
195 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
196 unsigned long scr_addr;
197
198 probe_ent->port[port].cmd_addr = reg_addr;
199 probe_ent->port[port].altstatus_addr =
200 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
201 probe_ent->port[port].bmdma_addr = bmdma_addr;
202
203 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
204 probe_ent->port[port].scr_addr = scr_addr;
205
206 ata_std_ports(&probe_ent->port[port]);
207 }
208
209 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
210 {
211 struct ata_probe_ent *probe_ent;
212 struct ata_port_info *ppi = &svia_port_info;
213
214 probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
215 if (!probe_ent)
216 return NULL;
217
218 probe_ent->port[0].scr_addr =
219 svia_scr_addr(pci_resource_start(pdev, 5), 0);
220 probe_ent->port[1].scr_addr =
221 svia_scr_addr(pci_resource_start(pdev, 5), 1);
222
223 return probe_ent;
224 }
225
226 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
227 {
228 struct ata_probe_ent *probe_ent;
229 unsigned int i;
230
231 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
232 if (!probe_ent)
233 return NULL;
234
235 memset(probe_ent, 0, sizeof(*probe_ent));
236 probe_ent->dev = pci_dev_to_dev(pdev);
237 INIT_LIST_HEAD(&probe_ent->node);
238
239 probe_ent->sht = &svia_sht;
240 probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
241 ATA_FLAG_NO_LEGACY;
242 probe_ent->port_ops = &svia_sata_ops;
243 probe_ent->n_ports = N_PORTS;
244 probe_ent->irq = pdev->irq;
245 probe_ent->irq_flags = SA_SHIRQ;
246 probe_ent->pio_mask = 0x1f;
247 probe_ent->mwdma_mask = 0x07;
248 probe_ent->udma_mask = 0x7f;
249
250 for (i = 0; i < N_PORTS; i++)
251 vt6421_init_addrs(probe_ent, pdev, i);
252
253 return probe_ent;
254 }
255
256 static void svia_configure(struct pci_dev *pdev)
257 {
258 u8 tmp8;
259
260 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
261 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
262 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
263
264 /* make sure SATA channels are enabled */
265 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
266 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
267 dev_printk(KERN_DEBUG, &pdev->dev,
268 "enabling SATA channels (0x%x)\n",
269 (int) tmp8);
270 tmp8 |= ALL_PORTS;
271 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
272 }
273
274 /* make sure interrupts for each channel sent to us */
275 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
276 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
277 dev_printk(KERN_DEBUG, &pdev->dev,
278 "enabling SATA channel interrupts (0x%x)\n",
279 (int) tmp8);
280 tmp8 |= ALL_PORTS;
281 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
282 }
283
284 /* make sure native mode is enabled */
285 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
286 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
287 dev_printk(KERN_DEBUG, &pdev->dev,
288 "enabling SATA channel native mode (0x%x)\n",
289 (int) tmp8);
290 tmp8 |= NATIVE_MODE_ALL;
291 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
292 }
293 }
294
295 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
296 {
297 static int printed_version;
298 unsigned int i;
299 int rc;
300 struct ata_probe_ent *probe_ent;
301 int board_id = (int) ent->driver_data;
302 const int *bar_sizes;
303 int pci_dev_busy = 0;
304 u8 tmp8;
305
306 if (!printed_version++)
307 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
308
309 rc = pci_enable_device(pdev);
310 if (rc)
311 return rc;
312
313 rc = pci_request_regions(pdev, DRV_NAME);
314 if (rc) {
315 pci_dev_busy = 1;
316 goto err_out;
317 }
318
319 if (board_id == vt6420) {
320 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
321 if (tmp8 & SATA_2DEV) {
322 dev_printk(KERN_ERR, &pdev->dev,
323 "SATA master/slave not supported (0x%x)\n",
324 (int) tmp8);
325 rc = -EIO;
326 goto err_out_regions;
327 }
328
329 bar_sizes = &svia_bar_sizes[0];
330 } else {
331 bar_sizes = &vt6421_bar_sizes[0];
332 }
333
334 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
335 if ((pci_resource_start(pdev, i) == 0) ||
336 (pci_resource_len(pdev, i) < bar_sizes[i])) {
337 dev_printk(KERN_ERR, &pdev->dev,
338 "invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n",
339 i,
340 pci_resource_start(pdev, i),
341 pci_resource_len(pdev, i));
342 rc = -ENODEV;
343 goto err_out_regions;
344 }
345
346 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
347 if (rc)
348 goto err_out_regions;
349 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
350 if (rc)
351 goto err_out_regions;
352
353 if (board_id == vt6420)
354 probe_ent = vt6420_init_probe_ent(pdev);
355 else
356 probe_ent = vt6421_init_probe_ent(pdev);
357
358 if (!probe_ent) {
359 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
360 rc = -ENOMEM;
361 goto err_out_regions;
362 }
363
364 svia_configure(pdev);
365
366 pci_set_master(pdev);
367
368 /* FIXME: check ata_device_add return value */
369 ata_device_add(probe_ent);
370 kfree(probe_ent);
371
372 return 0;
373
374 err_out_regions:
375 pci_release_regions(pdev);
376 err_out:
377 if (!pci_dev_busy)
378 pci_disable_device(pdev);
379 return rc;
380 }
381
382 static int __init svia_init(void)
383 {
384 return pci_module_init(&svia_pci_driver);
385 }
386
387 static void __exit svia_exit(void)
388 {
389 pci_unregister_driver(&svia_pci_driver);
390 }
391
392 module_init(svia_init);
393 module_exit(svia_exit);
394
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