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 vt6420_error_handler(struct ata_port *ap);
79 static const struct pci_device_id svia_pci_tbl[] = {
80 { PCI_VDEVICE(VIA, 0x5337), vt6420 },
81 { PCI_VDEVICE(VIA, 0x0591), vt6420 },
82 { PCI_VDEVICE(VIA, 0x3149), vt6420 },
83 { PCI_VDEVICE(VIA, 0x3249), vt6421 },
85 { } /* terminate list */
88 static struct pci_driver svia_pci_driver = {
90 .id_table = svia_pci_tbl,
91 .probe = svia_init_one,
92 .remove = ata_pci_remove_one,
95 static struct scsi_host_template svia_sht = {
96 .module = THIS_MODULE,
98 .ioctl = ata_scsi_ioctl,
99 .queuecommand = ata_scsi_queuecmd,
100 .can_queue = ATA_DEF_QUEUE,
101 .this_id = ATA_SHT_THIS_ID,
102 .sg_tablesize = LIBATA_MAX_PRD,
103 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
104 .emulated = ATA_SHT_EMULATED,
105 .use_clustering = ATA_SHT_USE_CLUSTERING,
106 .proc_name = DRV_NAME,
107 .dma_boundary = ATA_DMA_BOUNDARY,
108 .slave_configure = ata_scsi_slave_config,
109 .slave_destroy = ata_scsi_slave_destroy,
110 .bios_param = ata_std_bios_param,
113 static const struct ata_port_operations vt6420_sata_ops = {
114 .port_disable = ata_port_disable,
116 .tf_load = ata_tf_load,
117 .tf_read = ata_tf_read,
118 .check_status = ata_check_status,
119 .exec_command = ata_exec_command,
120 .dev_select = ata_std_dev_select,
122 .bmdma_setup = ata_bmdma_setup,
123 .bmdma_start = ata_bmdma_start,
124 .bmdma_stop = ata_bmdma_stop,
125 .bmdma_status = ata_bmdma_status,
127 .qc_prep = ata_qc_prep,
128 .qc_issue = ata_qc_issue_prot,
129 .data_xfer = ata_pio_data_xfer,
131 .freeze = ata_bmdma_freeze,
132 .thaw = ata_bmdma_thaw,
133 .error_handler = vt6420_error_handler,
134 .post_internal_cmd = ata_bmdma_post_internal_cmd,
136 .irq_handler = ata_interrupt,
137 .irq_clear = ata_bmdma_irq_clear,
139 .port_start = ata_port_start,
140 .port_stop = ata_port_stop,
141 .host_stop = ata_host_stop,
144 static const struct ata_port_operations vt6421_sata_ops = {
145 .port_disable = ata_port_disable,
147 .tf_load = ata_tf_load,
148 .tf_read = ata_tf_read,
149 .check_status = ata_check_status,
150 .exec_command = ata_exec_command,
151 .dev_select = ata_std_dev_select,
153 .bmdma_setup = ata_bmdma_setup,
154 .bmdma_start = ata_bmdma_start,
155 .bmdma_stop = ata_bmdma_stop,
156 .bmdma_status = ata_bmdma_status,
158 .qc_prep = ata_qc_prep,
159 .qc_issue = ata_qc_issue_prot,
160 .data_xfer = ata_pio_data_xfer,
162 .freeze = ata_bmdma_freeze,
163 .thaw = ata_bmdma_thaw,
164 .error_handler = ata_bmdma_error_handler,
165 .post_internal_cmd = ata_bmdma_post_internal_cmd,
167 .irq_handler = ata_interrupt,
168 .irq_clear = ata_bmdma_irq_clear,
170 .scr_read = svia_scr_read,
171 .scr_write = svia_scr_write,
173 .port_start = ata_port_start,
174 .port_stop = ata_port_stop,
175 .host_stop = ata_host_stop,
178 static struct ata_port_info vt6420_port_info = {
180 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
184 .port_ops = &vt6420_sata_ops,
187 MODULE_AUTHOR("Jeff Garzik");
188 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
189 MODULE_LICENSE("GPL");
190 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
191 MODULE_VERSION(DRV_VERSION);
193 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
195 if (sc_reg > SCR_CONTROL)
197 return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
200 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
202 if (sc_reg > SCR_CONTROL)
204 outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
208 * vt6420_prereset - prereset for vt6420
209 * @ap: target ATA port
211 * SCR registers on vt6420 are pieces of shit and may hang the
212 * whole machine completely if accessed with the wrong timing.
213 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
214 * access operations, but uses SStatus and SControl only during
215 * boot probing in controlled way.
217 * As the old (pre EH update) probing code is proven to work, we
218 * strictly follow the access pattern.
221 * Kernel thread context (may sleep)
224 * 0 on success, -errno otherwise.
226 static int vt6420_prereset(struct ata_port *ap)
228 struct ata_eh_context *ehc = &ap->eh_context;
229 unsigned long timeout = jiffies + (HZ * 5);
230 u32 sstatus, scontrol;
233 /* don't do any SCR stuff if we're not loading */
234 if (!(ap->pflags & ATA_PFLAG_LOADING))
237 /* Resume phy. This is the old resume sequence from
238 * __sata_phy_reset().
240 svia_scr_write(ap, SCR_CONTROL, 0x300);
241 svia_scr_read(ap, SCR_CONTROL); /* flush */
243 /* wait for phy to become ready, if necessary */
246 if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
248 } while (time_before(jiffies, timeout));
250 /* open code sata_print_link_status() */
251 sstatus = svia_scr_read(ap, SCR_STATUS);
252 scontrol = svia_scr_read(ap, SCR_CONTROL);
254 online = (sstatus & 0xf) == 0x3;
256 ata_port_printk(ap, KERN_INFO,
257 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
258 online ? "up" : "down", sstatus, scontrol);
260 /* SStatus is read one more time */
261 svia_scr_read(ap, SCR_STATUS);
264 /* tell EH to bail */
265 ehc->i.action &= ~ATA_EH_RESET_MASK;
271 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
276 static void vt6420_error_handler(struct ata_port *ap)
278 return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
279 NULL, ata_std_postreset);
282 static const unsigned int svia_bar_sizes[] = {
286 static const unsigned int vt6421_bar_sizes[] = {
287 16, 16, 16, 16, 32, 128
290 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
292 return addr + (port * 128);
295 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
297 return addr + (port * 64);
300 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
301 struct pci_dev *pdev,
304 unsigned long reg_addr = pci_resource_start(pdev, port);
305 unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
306 unsigned long scr_addr;
308 probe_ent->port[port].cmd_addr = reg_addr;
309 probe_ent->port[port].altstatus_addr =
310 probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
311 probe_ent->port[port].bmdma_addr = bmdma_addr;
313 scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
314 probe_ent->port[port].scr_addr = scr_addr;
316 ata_std_ports(&probe_ent->port[port]);
319 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
321 struct ata_probe_ent *probe_ent;
322 struct ata_port_info *ppi[2];
324 ppi[0] = ppi[1] = &vt6420_port_info;
325 probe_ent = ata_pci_init_native_mode(pdev, ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
329 probe_ent->port[0].scr_addr =
330 svia_scr_addr(pci_resource_start(pdev, 5), 0);
331 probe_ent->port[1].scr_addr =
332 svia_scr_addr(pci_resource_start(pdev, 5), 1);
337 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
339 struct ata_probe_ent *probe_ent;
342 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
346 memset(probe_ent, 0, sizeof(*probe_ent));
347 probe_ent->dev = pci_dev_to_dev(pdev);
348 INIT_LIST_HEAD(&probe_ent->node);
350 probe_ent->sht = &svia_sht;
351 probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
352 probe_ent->port_ops = &vt6421_sata_ops;
353 probe_ent->n_ports = N_PORTS;
354 probe_ent->irq = pdev->irq;
355 probe_ent->irq_flags = IRQF_SHARED;
356 probe_ent->pio_mask = 0x1f;
357 probe_ent->mwdma_mask = 0x07;
358 probe_ent->udma_mask = 0x7f;
360 for (i = 0; i < N_PORTS; i++)
361 vt6421_init_addrs(probe_ent, pdev, i);
366 static void svia_configure(struct pci_dev *pdev)
370 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
371 dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
372 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
374 /* make sure SATA channels are enabled */
375 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
376 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
377 dev_printk(KERN_DEBUG, &pdev->dev,
378 "enabling SATA channels (0x%x)\n",
381 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
384 /* make sure interrupts for each channel sent to us */
385 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
386 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
387 dev_printk(KERN_DEBUG, &pdev->dev,
388 "enabling SATA channel interrupts (0x%x)\n",
391 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
394 /* make sure native mode is enabled */
395 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
396 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
397 dev_printk(KERN_DEBUG, &pdev->dev,
398 "enabling SATA channel native mode (0x%x)\n",
400 tmp8 |= NATIVE_MODE_ALL;
401 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
405 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
407 static int printed_version;
410 struct ata_probe_ent *probe_ent;
411 int board_id = (int) ent->driver_data;
412 const int *bar_sizes;
413 int pci_dev_busy = 0;
416 if (!printed_version++)
417 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
419 rc = pci_enable_device(pdev);
423 rc = pci_request_regions(pdev, DRV_NAME);
429 if (board_id == vt6420) {
430 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
431 if (tmp8 & SATA_2DEV) {
432 dev_printk(KERN_ERR, &pdev->dev,
433 "SATA master/slave not supported (0x%x)\n",
436 goto err_out_regions;
439 bar_sizes = &svia_bar_sizes[0];
441 bar_sizes = &vt6421_bar_sizes[0];
444 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
445 if ((pci_resource_start(pdev, i) == 0) ||
446 (pci_resource_len(pdev, i) < bar_sizes[i])) {
447 dev_printk(KERN_ERR, &pdev->dev,
448 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
450 (unsigned long long)pci_resource_start(pdev, i),
451 (unsigned long long)pci_resource_len(pdev, i));
453 goto err_out_regions;
456 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
458 goto err_out_regions;
459 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
461 goto err_out_regions;
463 if (board_id == vt6420)
464 probe_ent = vt6420_init_probe_ent(pdev);
466 probe_ent = vt6421_init_probe_ent(pdev);
469 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
471 goto err_out_regions;
474 svia_configure(pdev);
476 pci_set_master(pdev);
478 /* FIXME: check ata_device_add return value */
479 ata_device_add(probe_ent);
485 pci_release_regions(pdev);
488 pci_disable_device(pdev);
492 static int __init svia_init(void)
494 return pci_register_driver(&svia_pci_driver);
497 static void __exit svia_exit(void)
499 pci_unregister_driver(&svia_pci_driver);
502 module_init(svia_init);
503 module_exit(svia_exit);