[PATCH] sata_via: Add SATA support for vt8237a
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ata / sata_via.c
blob6529189a2880efe84f83034c815167e2be01d7f9
1 /*
2 * sata_via.c - VIA Serial ATA controllers
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 on emails.
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
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.
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.
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.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available under NDA.
33 * To-do list:
34 * - VT6421 PATA support
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>
49 #define DRV_NAME "sata_via"
50 #define DRV_VERSION "2.0"
52 enum board_ids_enum {
53 vt6420,
54 vt6421,
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 */
63 PORT0 = (1 << 1),
64 PORT1 = (1 << 0),
65 ALL_PORTS = PORT0 | PORT1,
66 N_PORTS = 2,
68 NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
70 SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */
71 SATA_2DEV = (1 << 5), /* SATA is master/slave */
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);
78 static const struct pci_device_id svia_pci_tbl[] = {
79 { 0x1106, 0x0591, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
80 { 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
81 { 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },
83 { } /* terminate list */
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,
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,
111 static const struct ata_port_operations svia_sata_ops = {
112 .port_disable = ata_port_disable,
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,
120 .bmdma_setup = ata_bmdma_setup,
121 .bmdma_start = ata_bmdma_start,
122 .bmdma_stop = ata_bmdma_stop,
123 .bmdma_status = ata_bmdma_status,
125 .qc_prep = ata_qc_prep,
126 .qc_issue = ata_qc_issue_prot,
127 .data_xfer = ata_pio_data_xfer,
129 .freeze = ata_bmdma_freeze,
130 .thaw = ata_bmdma_thaw,
131 .error_handler = ata_bmdma_error_handler,
132 .post_internal_cmd = ata_bmdma_post_internal_cmd,
134 .irq_handler = ata_interrupt,
135 .irq_clear = ata_bmdma_irq_clear,
137 .scr_read = svia_scr_read,
138 .scr_write = svia_scr_write,
140 .port_start = ata_port_start,
141 .port_stop = ata_port_stop,
142 .host_stop = ata_host_stop,
145 static struct ata_port_info svia_port_info = {
146 .sht = &svia_sht,
147 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
148 .pio_mask = 0x1f,
149 .mwdma_mask = 0x07,
150 .udma_mask = 0x7f,
151 .port_ops = &svia_sata_ops,
154 MODULE_AUTHOR("Jeff Garzik");
155 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
156 MODULE_LICENSE("GPL");
157 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
158 MODULE_VERSION(DRV_VERSION);
160 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
162 if (sc_reg > SCR_CONTROL)
163 return 0xffffffffU;
164 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
167 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
169 if (sc_reg > SCR_CONTROL)
170 return;
171 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
174 static const unsigned int svia_bar_sizes[] = {
175 8, 4, 8, 4, 16, 256
178 static const unsigned int vt6421_bar_sizes[] = {
179 16, 16, 16, 16, 32, 128
182 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
184 return addr + (port * 128);
187 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
189 return addr + (port * 64);
192 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
193 struct pci_dev *pdev,
194 unsigned int port)
196 unsigned long reg_addr = pci_resource_start(pdev, port);
197 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
198 unsigned long scr_addr;
200 probe_ent->port[port].cmd_addr = reg_addr;
201 probe_ent->port[port].altstatus_addr =
202 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
203 probe_ent->port[port].bmdma_addr = bmdma_addr;
205 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
206 probe_ent->port[port].scr_addr = scr_addr;
208 ata_std_ports(&probe_ent->port[port]);
211 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
213 struct ata_probe_ent *probe_ent;
214 struct ata_port_info *ppi = &svia_port_info;
216 probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
217 if (!probe_ent)
218 return NULL;
220 probe_ent->port[0].scr_addr =
221 svia_scr_addr(pci_resource_start(pdev, 5), 0);
222 probe_ent->port[1].scr_addr =
223 svia_scr_addr(pci_resource_start(pdev, 5), 1);
225 return probe_ent;
228 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
230 struct ata_probe_ent *probe_ent;
231 unsigned int i;
233 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
234 if (!probe_ent)
235 return NULL;
237 memset(probe_ent, 0, sizeof(*probe_ent));
238 probe_ent->dev = pci_dev_to_dev(pdev);
239 INIT_LIST_HEAD(&probe_ent->node);
241 probe_ent->sht = &svia_sht;
242 probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
243 probe_ent->port_ops = &svia_sata_ops;
244 probe_ent->n_ports = N_PORTS;
245 probe_ent->irq = pdev->irq;
246 probe_ent->irq_flags = IRQF_SHARED;
247 probe_ent->pio_mask = 0x1f;
248 probe_ent->mwdma_mask = 0x07;
249 probe_ent->udma_mask = 0x7f;
251 for (i = 0; i < N_PORTS; i++)
252 vt6421_init_addrs(probe_ent, pdev, i);
254 return probe_ent;
257 static void svia_configure(struct pci_dev *pdev)
259 u8 tmp8;
261 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
262 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
263 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
265 /* make sure SATA channels are enabled */
266 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
267 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
268 dev_printk(KERN_DEBUG, &pdev->dev,
269 "enabling SATA channels (0x%x)\n",
270 (int) tmp8);
271 tmp8 |= ALL_PORTS;
272 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
275 /* make sure interrupts for each channel sent to us */
276 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
277 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
278 dev_printk(KERN_DEBUG, &pdev->dev,
279 "enabling SATA channel interrupts (0x%x)\n",
280 (int) tmp8);
281 tmp8 |= ALL_PORTS;
282 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
285 /* make sure native mode is enabled */
286 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
287 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
288 dev_printk(KERN_DEBUG, &pdev->dev,
289 "enabling SATA channel native mode (0x%x)\n",
290 (int) tmp8);
291 tmp8 |= NATIVE_MODE_ALL;
292 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
296 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
298 static int printed_version;
299 unsigned int i;
300 int rc;
301 struct ata_probe_ent *probe_ent;
302 int board_id = (int) ent->driver_data;
303 const int *bar_sizes;
304 int pci_dev_busy = 0;
305 u8 tmp8;
307 if (!printed_version++)
308 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
310 rc = pci_enable_device(pdev);
311 if (rc)
312 return rc;
314 rc = pci_request_regions(pdev, DRV_NAME);
315 if (rc) {
316 pci_dev_busy = 1;
317 goto err_out;
320 if (board_id == vt6420) {
321 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
322 if (tmp8 & SATA_2DEV) {
323 dev_printk(KERN_ERR, &pdev->dev,
324 "SATA master/slave not supported (0x%x)\n",
325 (int) tmp8);
326 rc = -EIO;
327 goto err_out_regions;
330 bar_sizes = &svia_bar_sizes[0];
331 } else {
332 bar_sizes = &vt6421_bar_sizes[0];
335 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
336 if ((pci_resource_start(pdev, i) == 0) ||
337 (pci_resource_len(pdev, i) < bar_sizes[i])) {
338 dev_printk(KERN_ERR, &pdev->dev,
339 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
341 (unsigned long long)pci_resource_start(pdev, i),
342 (unsigned long long)pci_resource_len(pdev, i));
343 rc = -ENODEV;
344 goto err_out_regions;
347 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
348 if (rc)
349 goto err_out_regions;
350 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
351 if (rc)
352 goto err_out_regions;
354 if (board_id == vt6420)
355 probe_ent = vt6420_init_probe_ent(pdev);
356 else
357 probe_ent = vt6421_init_probe_ent(pdev);
359 if (!probe_ent) {
360 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
361 rc = -ENOMEM;
362 goto err_out_regions;
365 svia_configure(pdev);
367 pci_set_master(pdev);
369 /* FIXME: check ata_device_add return value */
370 ata_device_add(probe_ent);
371 kfree(probe_ent);
373 return 0;
375 err_out_regions:
376 pci_release_regions(pdev);
377 err_out:
378 if (!pci_dev_busy)
379 pci_disable_device(pdev);
380 return rc;
383 static int __init svia_init(void)
385 return pci_register_driver(&svia_pci_driver);
388 static void __exit svia_exit(void)
390 pci_unregister_driver(&svia_pci_driver);
393 module_init(svia_init);
394 module_exit(svia_exit);