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[PATCH] radix-tree documentation cleanups
[linux-2.6/mini2440.git] / drivers / scsi / sata_via.c
blob791bf652ba632905b27271c453a701a87a7932b6
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 .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 .bios_param = ata_std_bios_param,
108 };
109
110 static const struct ata_port_operations svia_sata_ops = {
111 .port_disable = ata_port_disable,
112
113 .tf_load = ata_tf_load,
114 .tf_read = ata_tf_read,
115 .check_status = ata_check_status,
116 .exec_command = ata_exec_command,
117 .dev_select = ata_std_dev_select,
118
119 .phy_reset = sata_phy_reset,
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
129 .eng_timeout = ata_eng_timeout,
130
131 .irq_handler = ata_interrupt,
132 .irq_clear = ata_bmdma_irq_clear,
133
134 .scr_read = svia_scr_read,
135 .scr_write = svia_scr_write,
136
137 .port_start = ata_port_start,
138 .port_stop = ata_port_stop,
139 .host_stop = ata_host_stop,
140 };
141
142 static struct ata_port_info svia_port_info = {
143 .sht = &svia_sht,
144 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | ATA_FLAG_NO_LEGACY,
145 .pio_mask = 0x1f,
146 .mwdma_mask = 0x07,
147 .udma_mask = 0x7f,
148 .port_ops = &svia_sata_ops,
149 };
150
151 MODULE_AUTHOR("Jeff Garzik");
152 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
153 MODULE_LICENSE("GPL");
154 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
155 MODULE_VERSION(DRV_VERSION);
156
157 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
158 {
159 if (sc_reg > SCR_CONTROL)
160 return 0xffffffffU;
161 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
162 }
163
164 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
165 {
166 if (sc_reg > SCR_CONTROL)
167 return;
168 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
169 }
170
171 static const unsigned int svia_bar_sizes[] = {
172 8, 4, 8, 4, 16, 256
173 };
174
175 static const unsigned int vt6421_bar_sizes[] = {
176 16, 16, 16, 16, 32, 128
177 };
178
179 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
180 {
181 return addr + (port * 128);
182 }
183
184 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
185 {
186 return addr + (port * 64);
187 }
188
189 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
190 struct pci_dev *pdev,
191 unsigned int port)
192 {
193 unsigned long reg_addr = pci_resource_start(pdev, port);
194 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
195 unsigned long scr_addr;
196
197 probe_ent->port[port].cmd_addr = reg_addr;
198 probe_ent->port[port].altstatus_addr =
199 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
200 probe_ent->port[port].bmdma_addr = bmdma_addr;
201
202 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
203 probe_ent->port[port].scr_addr = scr_addr;
204
205 ata_std_ports(&probe_ent->port[port]);
206 }
207
208 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
209 {
210 struct ata_probe_ent *probe_ent;
211 struct ata_port_info *ppi = &svia_port_info;
212
213 probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
214 if (!probe_ent)
215 return NULL;
216
217 probe_ent->port[0].scr_addr =
218 svia_scr_addr(pci_resource_start(pdev, 5), 0);
219 probe_ent->port[1].scr_addr =
220 svia_scr_addr(pci_resource_start(pdev, 5), 1);
221
222 return probe_ent;
223 }
224
225 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
226 {
227 struct ata_probe_ent *probe_ent;
228 unsigned int i;
229
230 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
231 if (!probe_ent)
232 return NULL;
233
234 memset(probe_ent, 0, sizeof(*probe_ent));
235 probe_ent->dev = pci_dev_to_dev(pdev);
236 INIT_LIST_HEAD(&probe_ent->node);
237
238 probe_ent->sht = &svia_sht;
239 probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
240 ATA_FLAG_NO_LEGACY;
241 probe_ent->port_ops = &svia_sata_ops;
242 probe_ent->n_ports = N_PORTS;
243 probe_ent->irq = pdev->irq;
244 probe_ent->irq_flags = SA_SHIRQ;
245 probe_ent->pio_mask = 0x1f;
246 probe_ent->mwdma_mask = 0x07;
247 probe_ent->udma_mask = 0x7f;
248
249 for (i = 0; i < N_PORTS; i++)
250 vt6421_init_addrs(probe_ent, pdev, i);
251
252 return probe_ent;
253 }
254
255 static void svia_configure(struct pci_dev *pdev)
256 {
257 u8 tmp8;
258
259 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
260 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
261 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
262
263 /* make sure SATA channels are enabled */
264 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
265 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
266 dev_printk(KERN_DEBUG, &pdev->dev,
267 "enabling SATA channels (0x%x)\n",
268 (int) tmp8);
269 tmp8 |= ALL_PORTS;
270 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
271 }
272
273 /* make sure interrupts for each channel sent to us */
274 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
275 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
276 dev_printk(KERN_DEBUG, &pdev->dev,
277 "enabling SATA channel interrupts (0x%x)\n",
278 (int) tmp8);
279 tmp8 |= ALL_PORTS;
280 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
281 }
282
283 /* make sure native mode is enabled */
284 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
285 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
286 dev_printk(KERN_DEBUG, &pdev->dev,
287 "enabling SATA channel native mode (0x%x)\n",
288 (int) tmp8);
289 tmp8 |= NATIVE_MODE_ALL;
290 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
291 }
292 }
293
294 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
295 {
296 static int printed_version;
297 unsigned int i;
298 int rc;
299 struct ata_probe_ent *probe_ent;
300 int board_id = (int) ent->driver_data;
301 const int *bar_sizes;
302 int pci_dev_busy = 0;
303 u8 tmp8;
304
305 if (!printed_version++)
306 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
307
308 rc = pci_enable_device(pdev);
309 if (rc)
310 return rc;
311
312 rc = pci_request_regions(pdev, DRV_NAME);
313 if (rc) {
314 pci_dev_busy = 1;
315 goto err_out;
316 }
317
318 if (board_id == vt6420) {
319 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
320 if (tmp8 & SATA_2DEV) {
321 dev_printk(KERN_ERR, &pdev->dev,
322 "SATA master/slave not supported (0x%x)\n",
323 (int) tmp8);
324 rc = -EIO;
325 goto err_out_regions;
326 }
327
328 bar_sizes = &svia_bar_sizes[0];
329 } else {
330 bar_sizes = &vt6421_bar_sizes[0];
331 }
332
333 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
334 if ((pci_resource_start(pdev, i) == 0) ||
335 (pci_resource_len(pdev, i) < bar_sizes[i])) {
336 dev_printk(KERN_ERR, &pdev->dev,
337 "invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n",
338 i,
339 pci_resource_start(pdev, i),
340 pci_resource_len(pdev, i));
341 rc = -ENODEV;
342 goto err_out_regions;
343 }
344
345 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
346 if (rc)
347 goto err_out_regions;
348 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
349 if (rc)
350 goto err_out_regions;
351
352 if (board_id == vt6420)
353 probe_ent = vt6420_init_probe_ent(pdev);
354 else
355 probe_ent = vt6421_init_probe_ent(pdev);
356
357 if (!probe_ent) {
358 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
359 rc = -ENOMEM;
360 goto err_out_regions;
361 }
362
363 svia_configure(pdev);
364
365 pci_set_master(pdev);
366
367 /* FIXME: check ata_device_add return value */
368 ata_device_add(probe_ent);
369 kfree(probe_ent);
370
371 return 0;
372
373 err_out_regions:
374 pci_release_regions(pdev);
375 err_out:
376 if (!pci_dev_busy)
377 pci_disable_device(pdev);
378 return rc;
379 }
380
381 static int __init svia_init(void)
382 {
383 return pci_module_init(&svia_pci_driver);
384 }
385
386 static void __exit svia_exit(void)
387 {
388 pci_unregister_driver(&svia_pci_driver);
389 }
390
391 module_init(svia_init);
392 module_exit(svia_exit);
393
Support for the Chinese Samsung S3C2440 based development boards