3 ata_piix.c - Intel PATA/SATA controllers
5 Maintained by: Jeff Garzik <jgarzik@pobox.com>
6 Please ALWAYS copy linux-ide@vger.kernel.org
10 Copyright 2003-2004 Red Hat Inc
11 Copyright 2003-2004 Jeff Garzik
14 Copyright header from piix.c:
16 Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
17 Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
18 Copyright (C) 2003 Red Hat Inc <alan@redhat.com>
20 May be copied or modified under the terms of the GNU General Public License
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/pci.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/delay.h>
31 #include <scsi/scsi_host.h>
32 #include <linux/libata.h>
34 #define DRV_NAME "ata_piix"
35 #define DRV_VERSION "1.03"
38 PIIX_IOCFG
= 0x54, /* IDE I/O configuration register */
39 ICH5_PMR
= 0x90, /* port mapping register */
40 ICH5_PCS
= 0x92, /* port control and status */
42 PIIX_FLAG_AHCI
= (1 << 28), /* AHCI possible */
43 PIIX_FLAG_CHECKINTR
= (1 << 29), /* make sure PCI INTx enabled */
44 PIIX_FLAG_COMBINED
= (1 << 30), /* combined mode possible */
46 /* combined mode. if set, PATA is channel 0.
47 * if clear, PATA is channel 1.
49 PIIX_COMB_PATA_P0
= (1 << 1),
50 PIIX_COMB
= (1 << 2), /* combined mode enabled? */
52 PIIX_PORT_PRESENT
= (1 << 0),
53 PIIX_PORT_ENABLED
= (1 << 4),
55 PIIX_80C_PRI
= (1 << 5) | (1 << 4),
56 PIIX_80C_SEC
= (1 << 7) | (1 << 6),
66 static int piix_init_one (struct pci_dev
*pdev
,
67 const struct pci_device_id
*ent
);
69 static void piix_pata_phy_reset(struct ata_port
*ap
);
70 static void piix_sata_phy_reset(struct ata_port
*ap
);
71 static void piix_set_piomode (struct ata_port
*ap
, struct ata_device
*adev
);
72 static void piix_set_dmamode (struct ata_port
*ap
, struct ata_device
*adev
);
74 static unsigned int in_module_init
= 1;
76 static struct pci_device_id piix_pci_tbl
[] = {
77 #ifdef ATA_ENABLE_PATA
78 { 0x8086, 0x7111, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, piix4_pata
},
79 { 0x8086, 0x24db, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich5_pata
},
80 { 0x8086, 0x25a2, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich5_pata
},
83 /* NOTE: The following PCI ids must be kept in sync with the
84 * list in drivers/pci/quirks.c.
87 { 0x8086, 0x24d1, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich5_sata
},
88 { 0x8086, 0x24df, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich5_sata
},
89 { 0x8086, 0x25a3, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich5_sata
},
90 { 0x8086, 0x25b0, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich5_sata
},
91 { 0x8086, 0x2651, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich6_sata
},
92 { 0x8086, 0x2652, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich6_sata_rm
},
93 { 0x8086, 0x2653, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich6_sata_rm
},
94 { 0x8086, 0x27c0, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich7_sata
},
95 { 0x8086, 0x27c4, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, ich7_sata
},
97 { } /* terminate list */
100 static struct pci_driver piix_pci_driver
= {
102 .id_table
= piix_pci_tbl
,
103 .probe
= piix_init_one
,
104 .remove
= ata_pci_remove_one
,
107 static Scsi_Host_Template piix_sht
= {
108 .module
= THIS_MODULE
,
110 .ioctl
= ata_scsi_ioctl
,
111 .queuecommand
= ata_scsi_queuecmd
,
112 .eh_strategy_handler
= ata_scsi_error
,
113 .can_queue
= ATA_DEF_QUEUE
,
114 .this_id
= ATA_SHT_THIS_ID
,
115 .sg_tablesize
= LIBATA_MAX_PRD
,
116 .max_sectors
= ATA_MAX_SECTORS
,
117 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
118 .emulated
= ATA_SHT_EMULATED
,
119 .use_clustering
= ATA_SHT_USE_CLUSTERING
,
120 .proc_name
= DRV_NAME
,
121 .dma_boundary
= ATA_DMA_BOUNDARY
,
122 .slave_configure
= ata_scsi_slave_config
,
123 .bios_param
= ata_std_bios_param
,
127 static struct ata_port_operations piix_pata_ops
= {
128 .port_disable
= ata_port_disable
,
129 .set_piomode
= piix_set_piomode
,
130 .set_dmamode
= piix_set_dmamode
,
132 .tf_load
= ata_tf_load
,
133 .tf_read
= ata_tf_read
,
134 .check_status
= ata_check_status
,
135 .exec_command
= ata_exec_command
,
136 .dev_select
= ata_std_dev_select
,
138 .phy_reset
= piix_pata_phy_reset
,
140 .bmdma_setup
= ata_bmdma_setup
,
141 .bmdma_start
= ata_bmdma_start
,
142 .bmdma_stop
= ata_bmdma_stop
,
143 .bmdma_status
= ata_bmdma_status
,
144 .qc_prep
= ata_qc_prep
,
145 .qc_issue
= ata_qc_issue_prot
,
147 .eng_timeout
= ata_eng_timeout
,
149 .irq_handler
= ata_interrupt
,
150 .irq_clear
= ata_bmdma_irq_clear
,
152 .port_start
= ata_port_start
,
153 .port_stop
= ata_port_stop
,
156 static struct ata_port_operations piix_sata_ops
= {
157 .port_disable
= ata_port_disable
,
159 .tf_load
= ata_tf_load
,
160 .tf_read
= ata_tf_read
,
161 .check_status
= ata_check_status
,
162 .exec_command
= ata_exec_command
,
163 .dev_select
= ata_std_dev_select
,
165 .phy_reset
= piix_sata_phy_reset
,
167 .bmdma_setup
= ata_bmdma_setup
,
168 .bmdma_start
= ata_bmdma_start
,
169 .bmdma_stop
= ata_bmdma_stop
,
170 .bmdma_status
= ata_bmdma_status
,
171 .qc_prep
= ata_qc_prep
,
172 .qc_issue
= ata_qc_issue_prot
,
174 .eng_timeout
= ata_eng_timeout
,
176 .irq_handler
= ata_interrupt
,
177 .irq_clear
= ata_bmdma_irq_clear
,
179 .port_start
= ata_port_start
,
180 .port_stop
= ata_port_stop
,
183 static struct ata_port_info piix_port_info
[] = {
187 .host_flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
|
189 .pio_mask
= 0x1f, /* pio0-4 */
191 .mwdma_mask
= 0x06, /* mwdma1-2 */
193 .mwdma_mask
= 0x00, /* mwdma broken */
195 .udma_mask
= 0x3f, /* udma0-5 */
196 .port_ops
= &piix_pata_ops
,
202 .host_flags
= ATA_FLAG_SATA
| ATA_FLAG_SRST
|
203 PIIX_FLAG_COMBINED
| PIIX_FLAG_CHECKINTR
,
204 .pio_mask
= 0x1f, /* pio0-4 */
205 .mwdma_mask
= 0x07, /* mwdma0-2 */
206 .udma_mask
= 0x7f, /* udma0-6 */
207 .port_ops
= &piix_sata_ops
,
213 .host_flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_SRST
,
214 .pio_mask
= 0x1f, /* pio0-4 */
216 .mwdma_mask
= 0x06, /* mwdma1-2 */
218 .mwdma_mask
= 0x00, /* mwdma broken */
220 .udma_mask
= ATA_UDMA_MASK_40C
,
221 .port_ops
= &piix_pata_ops
,
227 .host_flags
= ATA_FLAG_SATA
| ATA_FLAG_SRST
|
228 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_SATA
| ATA_FLAG_SRST
|
240 PIIX_FLAG_COMBINED
| PIIX_FLAG_CHECKINTR
|
241 ATA_FLAG_SLAVE_POSS
| PIIX_FLAG_AHCI
,
242 .pio_mask
= 0x1f, /* pio0-4 */
243 .mwdma_mask
= 0x07, /* mwdma0-2 */
244 .udma_mask
= 0x7f, /* udma0-6 */
245 .port_ops
= &piix_sata_ops
,
251 .host_flags
= ATA_FLAG_SATA
| ATA_FLAG_SRST
|
252 PIIX_FLAG_COMBINED
| PIIX_FLAG_CHECKINTR
|
253 ATA_FLAG_SLAVE_POSS
| PIIX_FLAG_AHCI
,
254 .pio_mask
= 0x1f, /* pio0-4 */
255 .mwdma_mask
= 0x07, /* mwdma0-2 */
256 .udma_mask
= 0x7f, /* udma0-6 */
257 .port_ops
= &piix_sata_ops
,
261 static struct pci_bits piix_enable_bits
[] = {
262 { 0x41U
, 1U, 0x80UL
, 0x80UL
}, /* port 0 */
263 { 0x43U
, 1U, 0x80UL
, 0x80UL
}, /* port 1 */
266 MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
267 MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
268 MODULE_LICENSE("GPL");
269 MODULE_DEVICE_TABLE(pci
, piix_pci_tbl
);
270 MODULE_VERSION(DRV_VERSION
);
273 * piix_pata_cbl_detect - Probe host controller cable detect info
274 * @ap: Port for which cable detect info is desired
276 * Read 80c cable indicator from ATA PCI device's PCI config
277 * register. This register is normally set by firmware (BIOS).
280 * None (inherited from caller).
282 static void piix_pata_cbl_detect(struct ata_port
*ap
)
284 struct pci_dev
*pdev
= to_pci_dev(ap
->host_set
->dev
);
287 /* no 80c support in host controller? */
288 if ((ap
->udma_mask
& ~ATA_UDMA_MASK_40C
) == 0)
291 /* check BIOS cable detect results */
292 mask
= ap
->hard_port_no
== 0 ? PIIX_80C_PRI
: PIIX_80C_SEC
;
293 pci_read_config_byte(pdev
, PIIX_IOCFG
, &tmp
);
294 if ((tmp
& mask
) == 0)
297 ap
->cbl
= ATA_CBL_PATA80
;
301 ap
->cbl
= ATA_CBL_PATA40
;
302 ap
->udma_mask
&= ATA_UDMA_MASK_40C
;
306 * piix_pata_phy_reset - Probe specified port on PATA host controller
312 * None (inherited from caller).
315 static void piix_pata_phy_reset(struct ata_port
*ap
)
317 struct pci_dev
*pdev
= to_pci_dev(ap
->host_set
->dev
);
319 if (!pci_test_config_bits(pdev
, &piix_enable_bits
[ap
->hard_port_no
])) {
320 ata_port_disable(ap
);
321 printk(KERN_INFO
"ata%u: port disabled. ignoring.\n", ap
->id
);
325 piix_pata_cbl_detect(ap
);
333 * piix_sata_probe - Probe PCI device for present SATA devices
334 * @ap: Port associated with the PCI device we wish to probe
336 * Reads SATA PCI device's PCI config register Port Configuration
337 * and Status (PCS) to determine port and device availability.
340 * None (inherited from caller).
343 * Non-zero if device detected, zero otherwise.
345 static int piix_sata_probe (struct ata_port
*ap
)
347 struct pci_dev
*pdev
= to_pci_dev(ap
->host_set
->dev
);
348 int combined
= (ap
->flags
& ATA_FLAG_SLAVE_POSS
);
349 int orig_mask
, mask
, i
;
352 mask
= (PIIX_PORT_PRESENT
<< ap
->hard_port_no
) |
353 (PIIX_PORT_ENABLED
<< ap
->hard_port_no
);
355 pci_read_config_byte(pdev
, ICH5_PCS
, &pcs
);
356 orig_mask
= (int) pcs
& 0xff;
358 /* TODO: this is vaguely wrong for ICH6 combined mode,
359 * where only two of the four SATA ports are mapped
360 * onto a single ATA channel. It is also vaguely inaccurate
361 * for ICH5, which has only two ports. However, this is ok,
362 * as further device presence detection code will handle
363 * any false positives produced here.
366 for (i
= 0; i
< 4; i
++) {
367 mask
= (PIIX_PORT_PRESENT
<< i
) | (PIIX_PORT_ENABLED
<< i
);
369 if ((orig_mask
& mask
) == mask
)
370 if (combined
|| (i
== ap
->hard_port_no
))
378 * piix_sata_phy_reset - Probe specified port on SATA host controller
384 * None (inherited from caller).
387 static void piix_sata_phy_reset(struct ata_port
*ap
)
389 if (!piix_sata_probe(ap
)) {
390 ata_port_disable(ap
);
391 printk(KERN_INFO
"ata%u: SATA port has no device.\n", ap
->id
);
395 ap
->cbl
= ATA_CBL_SATA
;
403 * piix_set_piomode - Initialize host controller PATA PIO timings
404 * @ap: Port whose timings we are configuring
406 * @pio: PIO mode, 0 - 4
408 * Set PIO mode for device, in host controller PCI config space.
411 * None (inherited from caller).
414 static void piix_set_piomode (struct ata_port
*ap
, struct ata_device
*adev
)
416 unsigned int pio
= adev
->pio_mode
- XFER_PIO_0
;
417 struct pci_dev
*dev
= to_pci_dev(ap
->host_set
->dev
);
418 unsigned int is_slave
= (adev
->devno
!= 0);
419 unsigned int master_port
= ap
->hard_port_no
? 0x42 : 0x40;
420 unsigned int slave_port
= 0x44;
424 static const /* ISP RTC */
425 u8 timings
[][2] = { { 0, 0 },
431 pci_read_config_word(dev
, master_port
, &master_data
);
433 master_data
|= 0x4000;
434 /* enable PPE, IE and TIME */
435 master_data
|= 0x0070;
436 pci_read_config_byte(dev
, slave_port
, &slave_data
);
437 slave_data
&= (ap
->hard_port_no
? 0x0f : 0xf0);
439 (timings
[pio
][0] << 2) |
440 (timings
[pio
][1] << (ap
->hard_port_no
? 4 : 0));
442 master_data
&= 0xccf8;
443 /* enable PPE, IE and TIME */
444 master_data
|= 0x0007;
446 (timings
[pio
][0] << 12) |
447 (timings
[pio
][1] << 8);
449 pci_write_config_word(dev
, master_port
, master_data
);
451 pci_write_config_byte(dev
, slave_port
, slave_data
);
455 * piix_set_dmamode - Initialize host controller PATA PIO timings
456 * @ap: Port whose timings we are configuring
458 * @udma: udma mode, 0 - 6
460 * Set UDMA mode for device, in host controller PCI config space.
463 * None (inherited from caller).
466 static void piix_set_dmamode (struct ata_port
*ap
, struct ata_device
*adev
)
468 unsigned int udma
= adev
->dma_mode
; /* FIXME: MWDMA too */
469 struct pci_dev
*dev
= to_pci_dev(ap
->host_set
->dev
);
470 u8 maslave
= ap
->hard_port_no
? 0x42 : 0x40;
472 unsigned int drive_dn
= (ap
->hard_port_no
? 2 : 0) + adev
->devno
;
473 int a_speed
= 3 << (drive_dn
* 4);
474 int u_flag
= 1 << drive_dn
;
475 int v_flag
= 0x01 << drive_dn
;
476 int w_flag
= 0x10 << drive_dn
;
480 u8 reg48
, reg54
, reg55
;
482 pci_read_config_word(dev
, maslave
, ®4042
);
483 DPRINTK("reg4042 = 0x%04x\n", reg4042
);
484 sitre
= (reg4042
& 0x4000) ? 1 : 0;
485 pci_read_config_byte(dev
, 0x48, ®48
);
486 pci_read_config_word(dev
, 0x4a, ®4a
);
487 pci_read_config_byte(dev
, 0x54, ®54
);
488 pci_read_config_byte(dev
, 0x55, ®55
);
492 case XFER_UDMA_2
: u_speed
= 2 << (drive_dn
* 4); break;
496 case XFER_UDMA_1
: u_speed
= 1 << (drive_dn
* 4); break;
497 case XFER_UDMA_0
: u_speed
= 0 << (drive_dn
* 4); break;
499 case XFER_MW_DMA_1
: break;
505 if (speed
>= XFER_UDMA_0
) {
506 if (!(reg48
& u_flag
))
507 pci_write_config_byte(dev
, 0x48, reg48
| u_flag
);
508 if (speed
== XFER_UDMA_5
) {
509 pci_write_config_byte(dev
, 0x55, (u8
) reg55
|w_flag
);
511 pci_write_config_byte(dev
, 0x55, (u8
) reg55
& ~w_flag
);
513 if ((reg4a
& a_speed
) != u_speed
)
514 pci_write_config_word(dev
, 0x4a, (reg4a
& ~a_speed
) | u_speed
);
515 if (speed
> XFER_UDMA_2
) {
516 if (!(reg54
& v_flag
))
517 pci_write_config_byte(dev
, 0x54, reg54
| v_flag
);
519 pci_write_config_byte(dev
, 0x54, reg54
& ~v_flag
);
522 pci_write_config_byte(dev
, 0x48, reg48
& ~u_flag
);
524 pci_write_config_word(dev
, 0x4a, reg4a
& ~a_speed
);
526 pci_write_config_byte(dev
, 0x54, reg54
& ~v_flag
);
528 pci_write_config_byte(dev
, 0x55, (u8
) reg55
& ~w_flag
);
532 /* move to PCI layer, integrate w/ MSI stuff */
533 static void pci_enable_intx(struct pci_dev
*pdev
)
537 pci_read_config_word(pdev
, PCI_COMMAND
, &pci_command
);
538 if (pci_command
& PCI_COMMAND_INTX_DISABLE
) {
539 pci_command
&= ~PCI_COMMAND_INTX_DISABLE
;
540 pci_write_config_word(pdev
, PCI_COMMAND
, pci_command
);
544 #define AHCI_PCI_BAR 5
545 #define AHCI_GLOBAL_CTL 0x04
546 #define AHCI_ENABLE (1 << 31)
547 static int piix_disable_ahci(struct pci_dev
*pdev
)
554 /* BUG: pci_enable_device has not yet been called. This
555 * works because this device is usually set up by BIOS.
558 addr
= pci_resource_start(pdev
, AHCI_PCI_BAR
);
559 if (!addr
|| !pci_resource_len(pdev
, AHCI_PCI_BAR
))
562 mmio
= ioremap(addr
, 64);
566 tmp
= readl(mmio
+ AHCI_GLOBAL_CTL
);
567 if (tmp
& AHCI_ENABLE
) {
569 writel(tmp
, mmio
+ AHCI_GLOBAL_CTL
);
571 tmp
= readl(mmio
+ AHCI_GLOBAL_CTL
);
572 if (tmp
& AHCI_ENABLE
)
581 * piix_init_one - Register PIIX ATA PCI device with kernel services
582 * @pdev: PCI device to register
583 * @ent: Entry in piix_pci_tbl matching with @pdev
585 * Called from kernel PCI layer. We probe for combined mode (sigh),
586 * and then hand over control to libata, for it to do the rest.
589 * Inherited from PCI layer (may sleep).
592 * Zero on success, or -ERRNO value.
595 static int piix_init_one (struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
597 static int printed_version
;
598 struct ata_port_info
*port_info
[2];
599 unsigned int combined
= 0, n_ports
= 1;
600 unsigned int pata_chan
= 0, sata_chan
= 0;
602 if (!printed_version
++)
603 printk(KERN_DEBUG DRV_NAME
" version " DRV_VERSION
"\n");
605 /* no hotplugging support (FIXME) */
609 port_info
[0] = &piix_port_info
[ent
->driver_data
];
612 if (port_info
[0]->host_flags
& PIIX_FLAG_AHCI
) {
613 int rc
= piix_disable_ahci(pdev
);
618 if (port_info
[0]->host_flags
& PIIX_FLAG_COMBINED
) {
620 pci_read_config_byte(pdev
, ICH5_PMR
, &tmp
);
622 if (tmp
& PIIX_COMB
) {
624 if (tmp
& PIIX_COMB_PATA_P0
)
631 /* On ICH5, some BIOSen disable the interrupt using the
632 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
633 * On ICH6, this bit has the same effect, but only when
634 * MSI is disabled (and it is disabled, as we don't use
635 * message-signalled interrupts currently).
637 if (port_info
[0]->host_flags
& PIIX_FLAG_CHECKINTR
)
638 pci_enable_intx(pdev
);
641 port_info
[sata_chan
] = &piix_port_info
[ent
->driver_data
];
642 port_info
[sata_chan
]->host_flags
|= ATA_FLAG_SLAVE_POSS
;
643 port_info
[pata_chan
] = &piix_port_info
[ich5_pata
];
646 printk(KERN_WARNING DRV_NAME
": combined mode detected\n");
649 return ata_pci_init_one(pdev
, port_info
, n_ports
);
661 static int __init
piix_init(void)
665 DPRINTK("pci_module_init\n");
666 rc
= pci_module_init(&piix_pci_driver
);
683 static void __exit
piix_exit(void)
685 pci_unregister_driver(&piix_pci_driver
);
688 module_init(piix_init
);
689 module_exit(piix_exit
);