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
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)
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.
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>
49 #define DRV_NAME "sata_via"
50 #define DRV_VERSION "2.0"
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 */
65 ALL_PORTS = PORT0 | PORT1,
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);
77 static void svia_noop_freeze(struct ata_port *ap);
78 static void vt6420_error_handler(struct ata_port *ap);
80 static const struct pci_device_id svia_pci_tbl[] = {
81 { PCI_VDEVICE(VIA, 0x5337), vt6420 },
82 { PCI_VDEVICE(VIA, 0x0591), vt6420 },
83 { PCI_VDEVICE(VIA, 0x3149), vt6420 },
84 { PCI_VDEVICE(VIA, 0x3249), vt6421 },
86 { } /* terminate list */
89 static struct pci_driver svia_pci_driver = {
91 .id_table = svia_pci_tbl,
92 .probe = svia_init_one,
93 .remove = ata_pci_remove_one,
96 static struct scsi_host_template svia_sht = {
97 .module = THIS_MODULE,
99 .ioctl = ata_scsi_ioctl,
100 .queuecommand = ata_scsi_queuecmd,
101 .can_queue = ATA_DEF_QUEUE,
102 .this_id = ATA_SHT_THIS_ID,
103 .sg_tablesize = LIBATA_MAX_PRD,
104 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
105 .emulated = ATA_SHT_EMULATED,
106 .use_clustering = ATA_SHT_USE_CLUSTERING,
107 .proc_name = DRV_NAME,
108 .dma_boundary = ATA_DMA_BOUNDARY,
109 .slave_configure = ata_scsi_slave_config,
110 .slave_destroy = ata_scsi_slave_destroy,
111 .bios_param = ata_std_bios_param,
114 static const struct ata_port_operations vt6420_sata_ops = {
115 .port_disable = ata_port_disable,
117 .tf_load = ata_tf_load,
118 .tf_read = ata_tf_read,
119 .check_status = ata_check_status,
120 .exec_command = ata_exec_command,
121 .dev_select = ata_std_dev_select,
123 .bmdma_setup = ata_bmdma_setup,
124 .bmdma_start = ata_bmdma_start,
125 .bmdma_stop = ata_bmdma_stop,
126 .bmdma_status = ata_bmdma_status,
128 .qc_prep = ata_qc_prep,
129 .qc_issue = ata_qc_issue_prot,
130 .data_xfer = ata_pio_data_xfer,
132 .freeze = svia_noop_freeze,
133 .thaw = ata_bmdma_thaw,
134 .error_handler = vt6420_error_handler,
135 .post_internal_cmd = ata_bmdma_post_internal_cmd,
137 .irq_handler = ata_interrupt,
138 .irq_clear = ata_bmdma_irq_clear,
140 .port_start = ata_port_start,
141 .port_stop = ata_port_stop,
142 .host_stop = ata_host_stop,
145 static const struct ata_port_operations vt6421_sata_ops = {
146 .port_disable = ata_port_disable,
148 .tf_load = ata_tf_load,
149 .tf_read = ata_tf_read,
150 .check_status = ata_check_status,
151 .exec_command = ata_exec_command,
152 .dev_select = ata_std_dev_select,
154 .bmdma_setup = ata_bmdma_setup,
155 .bmdma_start = ata_bmdma_start,
156 .bmdma_stop = ata_bmdma_stop,
157 .bmdma_status = ata_bmdma_status,
159 .qc_prep = ata_qc_prep,
160 .qc_issue = ata_qc_issue_prot,
161 .data_xfer = ata_pio_data_xfer,
163 .freeze = ata_bmdma_freeze,
164 .thaw = ata_bmdma_thaw,
165 .error_handler = ata_bmdma_error_handler,
166 .post_internal_cmd = ata_bmdma_post_internal_cmd,
168 .irq_handler = ata_interrupt,
169 .irq_clear = ata_bmdma_irq_clear,
171 .scr_read = svia_scr_read,
172 .scr_write = svia_scr_write,
174 .port_start = ata_port_start,
175 .port_stop = ata_port_stop,
176 .host_stop = ata_host_stop,
179 static struct ata_port_info vt6420_port_info = {
181 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
185 .port_ops = &vt6420_sata_ops,
188 MODULE_AUTHOR("Jeff Garzik");
189 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
190 MODULE_LICENSE("GPL");
191 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
192 MODULE_VERSION(DRV_VERSION);
194 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
196 if (sc_reg > SCR_CONTROL)
198 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
201 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
203 if (sc_reg > SCR_CONTROL)
205 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
208 static void svia_noop_freeze(struct ata_port *ap)
210 /* Some VIA controllers choke if ATA_NIEN is manipulated in
211 * certain way. Leave it alone and just clear pending IRQ.
214 ata_bmdma_irq_clear(ap);
218 * vt6420_prereset - prereset for vt6420
219 * @ap: target ATA port
221 * SCR registers on vt6420 are pieces of shit and may hang the
222 * whole machine completely if accessed with the wrong timing.
223 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
224 * access operations, but uses SStatus and SControl only during
225 * boot probing in controlled way.
227 * As the old (pre EH update) probing code is proven to work, we
228 * strictly follow the access pattern.
231 * Kernel thread context (may sleep)
234 * 0 on success, -errno otherwise.
236 static int vt6420_prereset(struct ata_port *ap)
238 struct ata_eh_context *ehc = &ap->eh_context;
239 unsigned long timeout = jiffies + (HZ * 5);
240 u32 sstatus, scontrol;
243 /* don't do any SCR stuff if we're not loading */
244 if (!(ap->pflags & ATA_PFLAG_LOADING))
247 /* Resume phy. This is the old resume sequence from
248 * __sata_phy_reset().
250 svia_scr_write(ap, SCR_CONTROL, 0x300);
251 svia_scr_read(ap, SCR_CONTROL); /* flush */
253 /* wait for phy to become ready, if necessary */
256 if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
258 } while (time_before(jiffies, timeout));
260 /* open code sata_print_link_status() */
261 sstatus = svia_scr_read(ap, SCR_STATUS);
262 scontrol = svia_scr_read(ap, SCR_CONTROL);
264 online = (sstatus & 0xf) == 0x3;
266 ata_port_printk(ap, KERN_INFO,
267 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
268 online ? "up" : "down", sstatus, scontrol);
270 /* SStatus is read one more time */
271 svia_scr_read(ap, SCR_STATUS);
274 /* tell EH to bail */
275 ehc->i.action &= ~ATA_EH_RESET_MASK;
281 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
286 static void vt6420_error_handler(struct ata_port *ap)
288 return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
289 NULL, ata_std_postreset);
292 static const unsigned int svia_bar_sizes[] = {
296 static const unsigned int vt6421_bar_sizes[] = {
297 16, 16, 16, 16, 32, 128
300 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
302 return addr + (port * 128);
305 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
307 return addr + (port * 64);
310 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
311 struct pci_dev *pdev,
314 unsigned long reg_addr = pci_resource_start(pdev, port);
315 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
316 unsigned long scr_addr;
318 probe_ent->port[port].cmd_addr = reg_addr;
319 probe_ent->port[port].altstatus_addr =
320 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
321 probe_ent->port[port].bmdma_addr = bmdma_addr;
323 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
324 probe_ent->port[port].scr_addr = scr_addr;
326 ata_std_ports(&probe_ent->port[port]);
329 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
331 struct ata_probe_ent *probe_ent;
332 struct ata_port_info *ppi[2];
334 ppi[0] = ppi[1] = &vt6420_port_info;
335 probe_ent = ata_pci_init_native_mode(pdev, ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
339 probe_ent->port[0].scr_addr =
340 svia_scr_addr(pci_resource_start(pdev, 5), 0);
341 probe_ent->port[1].scr_addr =
342 svia_scr_addr(pci_resource_start(pdev, 5), 1);
347 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
349 struct ata_probe_ent *probe_ent;
352 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
356 memset(probe_ent, 0, sizeof(*probe_ent));
357 probe_ent->dev = pci_dev_to_dev(pdev);
358 INIT_LIST_HEAD(&probe_ent->node);
360 probe_ent->sht = &svia_sht;
361 probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
362 probe_ent->port_ops = &vt6421_sata_ops;
363 probe_ent->n_ports = N_PORTS;
364 probe_ent->irq = pdev->irq;
365 probe_ent->irq_flags = IRQF_SHARED;
366 probe_ent->pio_mask = 0x1f;
367 probe_ent->mwdma_mask = 0x07;
368 probe_ent->udma_mask = 0x7f;
370 for (i = 0; i < N_PORTS; i++)
371 vt6421_init_addrs(probe_ent, pdev, i);
376 static void svia_configure(struct pci_dev *pdev)
380 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
381 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
382 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
384 /* make sure SATA channels are enabled */
385 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
386 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
387 dev_printk(KERN_DEBUG, &pdev->dev,
388 "enabling SATA channels (0x%x)\n",
391 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
394 /* make sure interrupts for each channel sent to us */
395 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
396 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
397 dev_printk(KERN_DEBUG, &pdev->dev,
398 "enabling SATA channel interrupts (0x%x)\n",
401 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
404 /* make sure native mode is enabled */
405 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
406 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
407 dev_printk(KERN_DEBUG, &pdev->dev,
408 "enabling SATA channel native mode (0x%x)\n",
410 tmp8 |= NATIVE_MODE_ALL;
411 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
415 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
417 static int printed_version;
420 struct ata_probe_ent *probe_ent;
421 int board_id = (int) ent->driver_data;
422 const int *bar_sizes;
423 int pci_dev_busy = 0;
426 if (!printed_version++)
427 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
429 rc = pci_enable_device(pdev);
433 rc = pci_request_regions(pdev, DRV_NAME);
439 if (board_id == vt6420) {
440 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
441 if (tmp8 & SATA_2DEV) {
442 dev_printk(KERN_ERR, &pdev->dev,
443 "SATA master/slave not supported (0x%x)\n",
446 goto err_out_regions;
449 bar_sizes = &svia_bar_sizes[0];
451 bar_sizes = &vt6421_bar_sizes[0];
454 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
455 if ((pci_resource_start(pdev, i) == 0) ||
456 (pci_resource_len(pdev, i) < bar_sizes[i])) {
457 dev_printk(KERN_ERR, &pdev->dev,
458 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
460 (unsigned long long)pci_resource_start(pdev, i),
461 (unsigned long long)pci_resource_len(pdev, i));
463 goto err_out_regions;
466 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
468 goto err_out_regions;
469 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
471 goto err_out_regions;
473 if (board_id == vt6420)
474 probe_ent = vt6420_init_probe_ent(pdev);
476 probe_ent = vt6421_init_probe_ent(pdev);
479 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
481 goto err_out_regions;
484 svia_configure(pdev);
486 pci_set_master(pdev);
488 /* FIXME: check ata_device_add return value */
489 ata_device_add(probe_ent);
495 pci_release_regions(pdev);
498 pci_disable_device(pdev);
502 static int __init svia_init(void)
504 return pci_register_driver(&svia_pci_driver);
507 static void __exit svia_exit(void)
509 pci_unregister_driver(&svia_pci_driver);
512 module_init(svia_init);
513 module_exit(svia_exit);