2 * ata_piix.c - Intel PATA/SATA controllers
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2003-2005 Red Hat Inc
10 * Copyright 2003-2005 Jeff Garzik
13 * Copyright header from piix.c:
15 * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
16 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
17 * Copyright (C) 2003 Red Hat Inc <alan@redhat.com>
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2, or (at your option)
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program; see the file COPYING. If not, write to
32 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
35 * libata documentation is available via 'make {ps|pdf}docs',
36 * as Documentation/DocBook/libata.*
38 * Hardware documentation available at http://developer.intel.com/
42 #include <linux/kernel.h>
43 #include <linux/module.h>
44 #include <linux/pci.h>
45 #include <linux/init.h>
46 #include <linux/blkdev.h>
47 #include <linux/delay.h>
48 #include <linux/device.h>
50 #include <scsi/scsi_host.h>
51 #include <linux/libata.h>
53 #define DRV_NAME "ata_piix"
54 #define DRV_VERSION "1.04"
57 PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
58 ICH5_PMR = 0x90, /* port mapping register */
59 ICH5_PCS = 0x92, /* port control and status */
60 PIIX_SCC = 0x0A, /* sub-class code register */
62 PIIX_FLAG_AHCI = (1 << 28), /* AHCI possible */
63 PIIX_FLAG_CHECKINTR = (1 << 29), /* make sure PCI INTx enabled */
64 PIIX_FLAG_COMBINED = (1 << 30), /* combined mode possible */
66 /* combined mode. if set, PATA is channel 0.
67 * if clear, PATA is channel 1.
69 PIIX_COMB_PATA_P0 = (1 << 1),
70 PIIX_COMB = (1 << 2), /* combined mode enabled? */
72 PIIX_PORT_ENABLED = (1 << 0),
73 PIIX_PORT_PRESENT = (1 << 4),
75 PIIX_80C_PRI = (1 << 5) | (1 << 4),
76 PIIX_80C_SEC = (1 << 7) | (1 << 6),
89 static int piix_init_one (struct pci_dev *pdev,
90 const struct pci_device_id *ent);
92 static void piix_pata_phy_reset(struct ata_port *ap);
93 static void piix_sata_phy_reset(struct ata_port *ap);
94 static void piix_set_piomode (struct ata_port *ap, struct ata_device *adev);
95 static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev);
97 static unsigned int in_module_init = 1;
99 static struct pci_device_id piix_pci_tbl[] = {
100 #ifdef ATA_ENABLE_PATA
101 { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix4_pata },
102 { 0x8086, 0x24db, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata },
103 { 0x8086, 0x25a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata },
106 /* NOTE: The following PCI ids must be kept in sync with the
107 * list in drivers/pci/quirks.c.
110 { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
111 { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
112 { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
113 { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
114 { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
115 { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm },
116 { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm },
117 { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata },
118 { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata },
119 { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, esb2_sata },
121 { } /* terminate list */
124 static struct pci_driver piix_pci_driver = {
126 .id_table = piix_pci_tbl,
127 .probe = piix_init_one,
128 .remove = ata_pci_remove_one,
131 static Scsi_Host_Template piix_sht = {
132 .module = THIS_MODULE,
134 .ioctl = ata_scsi_ioctl,
135 .queuecommand = ata_scsi_queuecmd,
136 .eh_strategy_handler = ata_scsi_error,
137 .can_queue = ATA_DEF_QUEUE,
138 .this_id = ATA_SHT_THIS_ID,
139 .sg_tablesize = LIBATA_MAX_PRD,
140 .max_sectors = ATA_MAX_SECTORS,
141 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
142 .emulated = ATA_SHT_EMULATED,
143 .use_clustering = ATA_SHT_USE_CLUSTERING,
144 .proc_name = DRV_NAME,
145 .dma_boundary = ATA_DMA_BOUNDARY,
146 .slave_configure = ata_scsi_slave_config,
147 .bios_param = ata_std_bios_param,
151 static const struct ata_port_operations piix_pata_ops = {
152 .port_disable = ata_port_disable,
153 .set_piomode = piix_set_piomode,
154 .set_dmamode = piix_set_dmamode,
156 .tf_load = ata_tf_load,
157 .tf_read = ata_tf_read,
158 .check_status = ata_check_status,
159 .exec_command = ata_exec_command,
160 .dev_select = ata_std_dev_select,
162 .phy_reset = piix_pata_phy_reset,
164 .bmdma_setup = ata_bmdma_setup,
165 .bmdma_start = ata_bmdma_start,
166 .bmdma_stop = ata_bmdma_stop,
167 .bmdma_status = ata_bmdma_status,
168 .qc_prep = ata_qc_prep,
169 .qc_issue = ata_qc_issue_prot,
171 .eng_timeout = ata_eng_timeout,
173 .irq_handler = ata_interrupt,
174 .irq_clear = ata_bmdma_irq_clear,
176 .port_start = ata_port_start,
177 .port_stop = ata_port_stop,
178 .host_stop = ata_host_stop,
181 static const struct ata_port_operations piix_sata_ops = {
182 .port_disable = ata_port_disable,
184 .tf_load = ata_tf_load,
185 .tf_read = ata_tf_read,
186 .check_status = ata_check_status,
187 .exec_command = ata_exec_command,
188 .dev_select = ata_std_dev_select,
190 .phy_reset = piix_sata_phy_reset,
192 .bmdma_setup = ata_bmdma_setup,
193 .bmdma_start = ata_bmdma_start,
194 .bmdma_stop = ata_bmdma_stop,
195 .bmdma_status = ata_bmdma_status,
196 .qc_prep = ata_qc_prep,
197 .qc_issue = ata_qc_issue_prot,
199 .eng_timeout = ata_eng_timeout,
201 .irq_handler = ata_interrupt,
202 .irq_clear = ata_bmdma_irq_clear,
204 .port_start = ata_port_start,
205 .port_stop = ata_port_stop,
206 .host_stop = ata_host_stop,
209 static struct ata_port_info piix_port_info[] = {
213 .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
215 .pio_mask = 0x1f, /* pio0-4 */
217 .mwdma_mask = 0x06, /* mwdma1-2 */
219 .mwdma_mask = 0x00, /* mwdma broken */
221 .udma_mask = 0x3f, /* udma0-5 */
222 .port_ops = &piix_pata_ops,
228 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST |
229 PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR,
230 .pio_mask = 0x1f, /* pio0-4 */
231 .mwdma_mask = 0x07, /* mwdma0-2 */
232 .udma_mask = 0x7f, /* udma0-6 */
233 .port_ops = &piix_sata_ops,
239 .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
240 .pio_mask = 0x1f, /* pio0-4 */
242 .mwdma_mask = 0x06, /* mwdma1-2 */
244 .mwdma_mask = 0x00, /* mwdma broken */
246 .udma_mask = ATA_UDMA_MASK_40C,
247 .port_ops = &piix_pata_ops,
253 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST |
254 PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR |
256 .pio_mask = 0x1f, /* pio0-4 */
257 .mwdma_mask = 0x07, /* mwdma0-2 */
258 .udma_mask = 0x7f, /* udma0-6 */
259 .port_ops = &piix_sata_ops,
265 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST |
266 PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR |
267 ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI,
268 .pio_mask = 0x1f, /* pio0-4 */
269 .mwdma_mask = 0x07, /* mwdma0-2 */
270 .udma_mask = 0x7f, /* udma0-6 */
271 .port_ops = &piix_sata_ops,
277 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST |
278 PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR |
279 ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI,
280 .pio_mask = 0x1f, /* pio0-4 */
281 .mwdma_mask = 0x07, /* mwdma0-2 */
282 .udma_mask = 0x7f, /* udma0-6 */
283 .port_ops = &piix_sata_ops,
289 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST |
290 PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR |
291 ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI,
292 .pio_mask = 0x1f, /* pio0-4 */
293 .mwdma_mask = 0x07, /* mwdma0-2 */
294 .udma_mask = 0x7f, /* udma0-6 */
295 .port_ops = &piix_sata_ops,
299 static struct pci_bits piix_enable_bits[] = {
300 { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
301 { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
304 MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
305 MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
306 MODULE_LICENSE("GPL");
307 MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
308 MODULE_VERSION(DRV_VERSION);
311 * piix_pata_cbl_detect - Probe host controller cable detect info
312 * @ap: Port for which cable detect info is desired
314 * Read 80c cable indicator from ATA PCI device's PCI config
315 * register. This register is normally set by firmware (BIOS).
318 * None (inherited from caller).
320 static void piix_pata_cbl_detect(struct ata_port *ap)
322 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
325 /* no 80c support in host controller? */
326 if ((ap->udma_mask & ~ATA_UDMA_MASK_40C) == 0)
329 /* check BIOS cable detect results */
330 mask = ap->hard_port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
331 pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
332 if ((tmp & mask) == 0)
335 ap->cbl = ATA_CBL_PATA80;
339 ap->cbl = ATA_CBL_PATA40;
340 ap->udma_mask &= ATA_UDMA_MASK_40C;
344 * piix_pata_phy_reset - Probe specified port on PATA host controller
350 * None (inherited from caller).
353 static void piix_pata_phy_reset(struct ata_port *ap)
355 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
357 if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->hard_port_no])) {
358 ata_port_disable(ap);
359 printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id);
363 piix_pata_cbl_detect(ap);
371 * piix_sata_probe - Probe PCI device for present SATA devices
372 * @ap: Port associated with the PCI device we wish to probe
374 * Reads SATA PCI device's PCI config register Port Configuration
375 * and Status (PCS) to determine port and device availability.
378 * None (inherited from caller).
381 * Non-zero if port is enabled, it may or may not have a device
382 * attached in that case (PRESENT bit would only be set if BIOS probe
383 * was done). Zero is returned if port is disabled.
385 static int piix_sata_probe (struct ata_port *ap)
387 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
388 int combined = (ap->flags & ATA_FLAG_SLAVE_POSS);
389 int orig_mask, mask, i;
392 mask = (PIIX_PORT_PRESENT << ap->hard_port_no) |
393 (PIIX_PORT_ENABLED << ap->hard_port_no);
395 pci_read_config_byte(pdev, ICH5_PCS, &pcs);
396 orig_mask = (int) pcs & 0xff;
398 /* TODO: this is vaguely wrong for ICH6 combined mode,
399 * where only two of the four SATA ports are mapped
400 * onto a single ATA channel. It is also vaguely inaccurate
401 * for ICH5, which has only two ports. However, this is ok,
402 * as further device presence detection code will handle
403 * any false positives produced here.
406 for (i = 0; i < 4; i++) {
407 mask = (PIIX_PORT_ENABLED << i);
409 if ((orig_mask & mask) == mask)
410 if (combined || (i == ap->hard_port_no))
418 * piix_sata_phy_reset - Probe specified port on SATA host controller
424 * None (inherited from caller).
427 static void piix_sata_phy_reset(struct ata_port *ap)
429 if (!piix_sata_probe(ap)) {
430 ata_port_disable(ap);
431 printk(KERN_INFO "ata%u: SATA port has no device.\n", ap->id);
435 ap->cbl = ATA_CBL_SATA;
443 * piix_set_piomode - Initialize host controller PATA PIO timings
444 * @ap: Port whose timings we are configuring
447 * Set PIO mode for device, in host controller PCI config space.
450 * None (inherited from caller).
453 static void piix_set_piomode (struct ata_port *ap, struct ata_device *adev)
455 unsigned int pio = adev->pio_mode - XFER_PIO_0;
456 struct pci_dev *dev = to_pci_dev(ap->host_set->dev);
457 unsigned int is_slave = (adev->devno != 0);
458 unsigned int master_port= ap->hard_port_no ? 0x42 : 0x40;
459 unsigned int slave_port = 0x44;
463 static const /* ISP RTC */
464 u8 timings[][2] = { { 0, 0 },
470 pci_read_config_word(dev, master_port, &master_data);
472 master_data |= 0x4000;
473 /* enable PPE, IE and TIME */
474 master_data |= 0x0070;
475 pci_read_config_byte(dev, slave_port, &slave_data);
476 slave_data &= (ap->hard_port_no ? 0x0f : 0xf0);
478 (timings[pio][0] << 2) |
479 (timings[pio][1] << (ap->hard_port_no ? 4 : 0));
481 master_data &= 0xccf8;
482 /* enable PPE, IE and TIME */
483 master_data |= 0x0007;
485 (timings[pio][0] << 12) |
486 (timings[pio][1] << 8);
488 pci_write_config_word(dev, master_port, master_data);
490 pci_write_config_byte(dev, slave_port, slave_data);
494 * piix_set_dmamode - Initialize host controller PATA PIO timings
495 * @ap: Port whose timings we are configuring
497 * @udma: udma mode, 0 - 6
499 * Set UDMA mode for device, in host controller PCI config space.
502 * None (inherited from caller).
505 static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev)
507 unsigned int udma = adev->dma_mode; /* FIXME: MWDMA too */
508 struct pci_dev *dev = to_pci_dev(ap->host_set->dev);
509 u8 maslave = ap->hard_port_no ? 0x42 : 0x40;
511 unsigned int drive_dn = (ap->hard_port_no ? 2 : 0) + adev->devno;
512 int a_speed = 3 << (drive_dn * 4);
513 int u_flag = 1 << drive_dn;
514 int v_flag = 0x01 << drive_dn;
515 int w_flag = 0x10 << drive_dn;
519 u8 reg48, reg54, reg55;
521 pci_read_config_word(dev, maslave, ®4042);
522 DPRINTK("reg4042 = 0x%04x\n", reg4042);
523 sitre = (reg4042 & 0x4000) ? 1 : 0;
524 pci_read_config_byte(dev, 0x48, ®48);
525 pci_read_config_word(dev, 0x4a, ®4a);
526 pci_read_config_byte(dev, 0x54, ®54);
527 pci_read_config_byte(dev, 0x55, ®55);
531 case XFER_UDMA_2: u_speed = 2 << (drive_dn * 4); break;
535 case XFER_UDMA_1: u_speed = 1 << (drive_dn * 4); break;
536 case XFER_UDMA_0: u_speed = 0 << (drive_dn * 4); break;
538 case XFER_MW_DMA_1: break;
544 if (speed >= XFER_UDMA_0) {
545 if (!(reg48 & u_flag))
546 pci_write_config_byte(dev, 0x48, reg48 | u_flag);
547 if (speed == XFER_UDMA_5) {
548 pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
550 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
552 if ((reg4a & a_speed) != u_speed)
553 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
554 if (speed > XFER_UDMA_2) {
555 if (!(reg54 & v_flag))
556 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
558 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
561 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
563 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
565 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
567 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
571 #define AHCI_PCI_BAR 5
572 #define AHCI_GLOBAL_CTL 0x04
573 #define AHCI_ENABLE (1 << 31)
574 static int piix_disable_ahci(struct pci_dev *pdev)
580 /* BUG: pci_enable_device has not yet been called. This
581 * works because this device is usually set up by BIOS.
584 if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
585 !pci_resource_len(pdev, AHCI_PCI_BAR))
588 mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
592 tmp = readl(mmio + AHCI_GLOBAL_CTL);
593 if (tmp & AHCI_ENABLE) {
595 writel(tmp, mmio + AHCI_GLOBAL_CTL);
597 tmp = readl(mmio + AHCI_GLOBAL_CTL);
598 if (tmp & AHCI_ENABLE)
602 pci_iounmap(pdev, mmio);
607 * piix_init_one - Register PIIX ATA PCI device with kernel services
608 * @pdev: PCI device to register
609 * @ent: Entry in piix_pci_tbl matching with @pdev
611 * Called from kernel PCI layer. We probe for combined mode (sigh),
612 * and then hand over control to libata, for it to do the rest.
615 * Inherited from PCI layer (may sleep).
618 * Zero on success, or -ERRNO value.
621 static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
623 static int printed_version;
624 struct ata_port_info *port_info[2];
625 unsigned int combined = 0;
626 unsigned int pata_chan = 0, sata_chan = 0;
628 if (!printed_version++)
629 dev_printk(KERN_DEBUG, &pdev->dev,
630 "version " DRV_VERSION "\n");
632 /* no hotplugging support (FIXME) */
636 port_info[0] = &piix_port_info[ent->driver_data];
637 port_info[1] = &piix_port_info[ent->driver_data];
639 if (port_info[0]->host_flags & PIIX_FLAG_AHCI) {
641 pci_read_config_byte(pdev, PIIX_SCC, &tmp);
642 if (tmp == PIIX_AHCI_DEVICE) {
643 int rc = piix_disable_ahci(pdev);
649 if (port_info[0]->host_flags & PIIX_FLAG_COMBINED) {
651 pci_read_config_byte(pdev, ICH5_PMR, &tmp);
653 if (tmp & PIIX_COMB) {
655 if (tmp & PIIX_COMB_PATA_P0)
662 /* On ICH5, some BIOSen disable the interrupt using the
663 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
664 * On ICH6, this bit has the same effect, but only when
665 * MSI is disabled (and it is disabled, as we don't use
666 * message-signalled interrupts currently).
668 if (port_info[0]->host_flags & PIIX_FLAG_CHECKINTR)
672 port_info[sata_chan] = &piix_port_info[ent->driver_data];
673 port_info[sata_chan]->host_flags |= ATA_FLAG_SLAVE_POSS;
674 port_info[pata_chan] = &piix_port_info[ich5_pata];
676 dev_printk(KERN_WARNING, &pdev->dev,
677 "combined mode detected (p=%u, s=%u)\n",
678 pata_chan, sata_chan);
681 return ata_pci_init_one(pdev, port_info, 2);
684 static int __init piix_init(void)
688 DPRINTK("pci_module_init\n");
689 rc = pci_module_init(&piix_pci_driver);
699 static void __exit piix_exit(void)
701 pci_unregister_driver(&piix_pci_driver);
704 module_init(piix_init);
705 module_exit(piix_exit);