aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/sata_via.c
blob: 6653ffe956f564fe19c9f9733f23c9b3fbbfc580 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/*
 *  sata_via.c - VIA Serial ATA controllers
 *
 *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
 * 		   Please ALWAYS copy linux-ide@vger.kernel.org
 		   on emails.
 *
 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
 *  Copyright 2003-2004 Jeff Garzik
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 *  libata documentation is available via 'make {ps|pdf}docs',
 *  as Documentation/DocBook/libata.*
 *
 *  Hardware documentation available under NDA.
 *
 *
 *  To-do list:
 *  - VT6421 PATA support
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <asm/io.h>

#define DRV_NAME	"sata_via"
#define DRV_VERSION	"1.1"

enum board_ids_enum {
	vt6420,
	vt6421,
};

enum {
	SATA_CHAN_ENAB		= 0x40, /* SATA channel enable */
	SATA_INT_GATE		= 0x41, /* SATA interrupt gating */
	SATA_NATIVE_MODE	= 0x42, /* Native mode enable */
	SATA_PATA_SHARING	= 0x49, /* PATA/SATA sharing func ctrl */

	PORT0			= (1 << 1),
	PORT1			= (1 << 0),
	ALL_PORTS		= PORT0 | PORT1,
	N_PORTS			= 2,

	NATIVE_MODE_ALL		= (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),

	SATA_EXT_PHY		= (1 << 6), /* 0==use PATA, 1==ext phy */
	SATA_2DEV		= (1 << 5), /* SATA is master/slave */
};

static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);

static struct pci_device_id svia_pci_tbl[] = {
	{ 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
	{ 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },

	{ }	/* terminate list */
};

static struct pci_driver svia_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= svia_pci_tbl,
	.probe			= svia_init_one,
	.remove			= ata_pci_remove_one,
};

static Scsi_Host_Template svia_sht = {
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.ioctl			= ata_scsi_ioctl,
	.queuecommand		= ata_scsi_queuecmd,
	.eh_strategy_handler	= ata_scsi_error,
	.can_queue		= ATA_DEF_QUEUE,
	.this_id		= ATA_SHT_THIS_ID,
	.sg_tablesize		= LIBATA_MAX_PRD,
	.max_sectors		= ATA_MAX_SECTORS,
	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
	.emulated		= ATA_SHT_EMULATED,
	.use_clustering		= ATA_SHT_USE_CLUSTERING,
	.proc_name		= DRV_NAME,
	.dma_boundary		= ATA_DMA_BOUNDARY,
	.slave_configure	= ata_scsi_slave_config,
	.bios_param		= ata_std_bios_param,
	.ordered_flush		= 1,
};

static struct ata_port_operations svia_sata_ops = {
	.port_disable		= ata_port_disable,

	.tf_load		= ata_tf_load,
	.tf_read		= ata_tf_read,
	.check_status		= ata_check_status,
	.exec_command		= ata_exec_command,
	.dev_select		= ata_std_dev_select,

	.phy_reset		= sata_phy_reset,

	.bmdma_setup            = ata_bmdma_setup,
	.bmdma_start            = ata_bmdma_start,
	.bmdma_stop		= ata_bmdma_stop,
	.bmdma_status		= ata_bmdma_status,

	.qc_prep		= ata_qc_prep,
	.qc_issue		= ata_qc_issue_prot,

	.eng_timeout		= ata_eng_timeout,

	.irq_handler		= ata_interrupt,
	.irq_clear		= ata_bmdma_irq_clear,

	.scr_read		= svia_scr_read,
	.scr_write		= svia_scr_write,

	.port_start		= ata_port_start,
	.port_stop		= ata_port_stop,
	.host_stop		= ata_host_stop,
};

static struct ata_port_info svia_port_info = {
	.sht		= &svia_sht,
	.host_flags	= ATA_FLAG_SATA | ATA_FLAG_SRST | ATA_FLAG_NO_LEGACY,
	.pio_mask	= 0x1f,
	.mwdma_mask	= 0x07,
	.udma_mask	= 0x7f,
	.port_ops	= &svia_sata_ops,
};

MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
MODULE_VERSION(DRV_VERSION);

static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
	if (sc_reg > SCR_CONTROL)
		return 0xffffffffU;
	return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
}

static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
	if (sc_reg > SCR_CONTROL)
		return;
	outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
}

static const unsigned int svia_bar_sizes[] = {
	8, 4, 8, 4, 16, 256
};

static const unsigned int vt6421_bar_sizes[] = {
	16, 16, 16, 16, 32, 128
};

static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
{
	return addr + (port * 128);
}

static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
{
	return addr + (port * 64);
}

static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
			      struct pci_dev *pdev,
			      unsigned int port)
{
	unsigned long reg_addr = pci_resource_start(pdev, port);
	unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
	unsigned long scr_addr;

	probe_ent->port[port].cmd_addr = reg_addr;
	probe_ent->port[port].altstatus_addr =
	probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
	probe_ent->port[port].bmdma_addr = bmdma_addr;

	scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
	probe_ent->port[port].scr_addr = scr_addr;

	ata_std_ports(&probe_ent->port[port]);
}

static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
{
	struct ata_probe_ent *probe_ent;
	struct ata_port_info *ppi = &svia_port_info;

	probe_ent = ata_pci_init_native_mode(pdev, &ppi);
	if (!probe_ent)
		return NULL;

	probe_ent->port[0].scr_addr =
		svia_scr_addr(pci_resource_start(pdev, 5), 0);
	probe_ent->port[1].scr_addr =
		svia_scr_addr(pci_resource_start(pdev, 5), 1);

	return probe_ent;
}

static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
{
	struct ata_probe_ent *probe_ent;
	unsigned int i;

	probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
	if (!probe_ent)
		return NULL;

	memset(probe_ent, 0, sizeof(*probe_ent));
	probe_ent->dev = pci_dev_to_dev(pdev);
	INIT_LIST_HEAD(&probe_ent->node);

	probe_ent->sht		= &svia_sht;
	probe_ent->host_flags	= ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
				  ATA_FLAG_NO_LEGACY;
	probe_ent->port_ops	= &svia_sata_ops;
	probe_ent->n_ports	= N_PORTS;
	probe_ent->irq		= pdev->irq;
	probe_ent->irq_flags	= SA_SHIRQ;
	probe_ent->pio_mask	= 0x1f;
	probe_ent->mwdma_mask	= 0x07;
	probe_ent->udma_mask	= 0x7f;

	for (i = 0; i < N_PORTS; i++)
		vt6421_init_addrs(probe_ent, pdev, i);

	return probe_ent;
}

static void svia_configure(struct pci_dev *pdev)
{
	u8 tmp8;

	pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
	printk(KERN_INFO DRV_NAME "(%s): routed to hard irq line %d\n",
	       pci_name(pdev),
	       (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);

	/* make sure SATA channels are enabled */
	pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
	if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
		printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channels (0x%x)\n",
		       pci_name(pdev), (int) tmp8);
		tmp8 |= ALL_PORTS;
		pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
	}

	/* make sure interrupts for each channel sent to us */
	pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
	if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
		printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel interrupts (0x%x)\n",
		       pci_name(pdev), (int) tmp8);
		tmp8 |= ALL_PORTS;
		pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
	}

	/* make sure native mode is enabled */
	pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
	if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
		printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel native mode (0x%x)\n",
		       pci_name(pdev), (int) tmp8);
		tmp8 |= NATIVE_MODE_ALL;
		pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
	}
}

static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
	static int printed_version;
	unsigned int i;
	int rc;
	struct ata_probe_ent *probe_ent;
	int board_id = (int) ent->driver_data;
	const int *bar_sizes;
	int pci_dev_busy = 0;
	u8 tmp8;

	if (!printed_version++)
		printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");

	rc = pci_enable_device(pdev);
	if (rc)
		return rc;

	rc = pci_request_regions(pdev, DRV_NAME);
	if (rc) {
		pci_dev_busy = 1;
		goto err_out;
	}

	if (board_id == vt6420) {
		pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
		if (tmp8 & SATA_2DEV) {
			printk(KERN_ERR DRV_NAME "(%s): SATA master/slave not supported (0x%x)\n",
		       	pci_name(pdev), (int) tmp8);
			rc = -EIO;
			goto err_out_regions;
		}

		bar_sizes = &svia_bar_sizes[0];
	} else {
		bar_sizes = &vt6421_bar_sizes[0];
	}

	for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
		if ((pci_resource_start(pdev, i) == 0) ||
		    (pci_resource_len(pdev, i) < bar_sizes[i])) {
			printk(KERN_ERR DRV_NAME "(%s): invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n",
			       pci_name(pdev), i,
			       pci_resource_start(pdev, i),
			       pci_resource_len(pdev, i));
			rc = -ENODEV;
			goto err_out_regions;
		}

	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
	if (rc)
		goto err_out_regions;
	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
	if (rc)
		goto err_out_regions;

	if (board_id == vt6420)
		probe_ent = vt6420_init_probe_ent(pdev);
	else
		probe_ent = vt6421_init_probe_ent(pdev);
	
	if (!probe_ent) {
		printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
		       pci_name(pdev));
		rc = -ENOMEM;
		goto err_out_regions;
	}

	svia_configure(pdev);

	pci_set_master(pdev);

	/* FIXME: check ata_device_add return value */
	ata_device_add(probe_ent);
	kfree(probe_ent);

	return 0;

err_out_regions:
	pci_release_regions(pdev);
err_out:
	if (!pci_dev_busy)
		pci_disable_device(pdev);
	return rc;
}

static int __init svia_init(void)
{
	return pci_module_init(&svia_pci_driver);
}

static void __exit svia_exit(void)
{
	pci_unregister_driver(&svia_pci_driver);
}

module_init(svia_init);
module_exit(svia_exit);