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.
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/blkdev.h>
41 #include <linux/delay.h>
42 #include <linux/device.h>
43 #include <scsi/scsi_host.h>
44 #include <linux/libata.h>
46 #define DRV_NAME "sata_via"
47 #define DRV_VERSION "2.4"
50 * vt8251 is different from other sata controllers of VIA. It has two
51 * channels, each channel has both Master and Slave slot.
60 SATA_CHAN_ENAB
= 0x40, /* SATA channel enable */
61 SATA_INT_GATE
= 0x41, /* SATA interrupt gating */
62 SATA_NATIVE_MODE
= 0x42, /* Native mode enable */
63 PATA_UDMA_TIMING
= 0xB3, /* PATA timing for DMA/ cable detect */
64 PATA_PIO_TIMING
= 0xAB, /* PATA timing register */
68 ALL_PORTS
= PORT0
| PORT1
,
70 NATIVE_MODE_ALL
= (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
72 SATA_EXT_PHY
= (1 << 6), /* 0==use PATA, 1==ext phy */
75 static int svia_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
76 static int svia_scr_read(struct ata_link
*link
, unsigned int sc_reg
, u32
*val
);
77 static int svia_scr_write(struct ata_link
*link
, unsigned int sc_reg
, u32 val
);
78 static int vt8251_scr_read(struct ata_link
*link
, unsigned int scr
, u32
*val
);
79 static int vt8251_scr_write(struct ata_link
*link
, unsigned int scr
, u32 val
);
80 static void svia_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
81 static void svia_noop_freeze(struct ata_port
*ap
);
82 static int vt6420_prereset(struct ata_link
*link
, unsigned long deadline
);
83 static int vt6421_pata_cable_detect(struct ata_port
*ap
);
84 static void vt6421_set_pio_mode(struct ata_port
*ap
, struct ata_device
*adev
);
85 static void vt6421_set_dma_mode(struct ata_port
*ap
, struct ata_device
*adev
);
87 static const struct pci_device_id svia_pci_tbl
[] = {
88 { PCI_VDEVICE(VIA
, 0x5337), vt6420
},
89 { PCI_VDEVICE(VIA
, 0x0591), vt6420
}, /* 2 sata chnls (Master) */
90 { PCI_VDEVICE(VIA
, 0x3149), vt6420
}, /* 2 sata chnls (Master) */
91 { PCI_VDEVICE(VIA
, 0x3249), vt6421
}, /* 2 sata chnls, 1 pata chnl */
92 { PCI_VDEVICE(VIA
, 0x5372), vt6420
},
93 { PCI_VDEVICE(VIA
, 0x7372), vt6420
},
94 { PCI_VDEVICE(VIA
, 0x5287), vt8251
}, /* 2 sata chnls (Master/Slave) */
95 { PCI_VDEVICE(VIA
, 0x9000), vt8251
},
96 { PCI_VDEVICE(VIA
, 0x9040), vt8251
},
98 { } /* terminate list */
101 static struct pci_driver svia_pci_driver
= {
103 .id_table
= svia_pci_tbl
,
104 .probe
= svia_init_one
,
106 .suspend
= ata_pci_device_suspend
,
107 .resume
= ata_pci_device_resume
,
109 .remove
= ata_pci_remove_one
,
112 static struct scsi_host_template svia_sht
= {
113 ATA_BMDMA_SHT(DRV_NAME
),
116 static struct ata_port_operations svia_base_ops
= {
117 .inherits
= &ata_bmdma_port_ops
,
118 .sff_tf_load
= svia_tf_load
,
121 static struct ata_port_operations vt6420_sata_ops
= {
122 .inherits
= &svia_base_ops
,
123 .freeze
= svia_noop_freeze
,
124 .prereset
= vt6420_prereset
,
127 static struct ata_port_operations vt6421_pata_ops
= {
128 .inherits
= &svia_base_ops
,
129 .cable_detect
= vt6421_pata_cable_detect
,
130 .set_piomode
= vt6421_set_pio_mode
,
131 .set_dmamode
= vt6421_set_dma_mode
,
134 static struct ata_port_operations vt6421_sata_ops
= {
135 .inherits
= &svia_base_ops
,
136 .scr_read
= svia_scr_read
,
137 .scr_write
= svia_scr_write
,
140 static struct ata_port_operations vt8251_ops
= {
141 .inherits
= &svia_base_ops
,
142 .hardreset
= sata_std_hardreset
,
143 .scr_read
= vt8251_scr_read
,
144 .scr_write
= vt8251_scr_write
,
147 static const struct ata_port_info vt6420_port_info
= {
148 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
,
149 .pio_mask
= ATA_PIO4
,
150 .mwdma_mask
= ATA_MWDMA2
,
151 .udma_mask
= ATA_UDMA6
,
152 .port_ops
= &vt6420_sata_ops
,
155 static struct ata_port_info vt6421_sport_info
= {
156 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
,
157 .pio_mask
= ATA_PIO4
,
158 .mwdma_mask
= ATA_MWDMA2
,
159 .udma_mask
= ATA_UDMA6
,
160 .port_ops
= &vt6421_sata_ops
,
163 static struct ata_port_info vt6421_pport_info
= {
164 .flags
= ATA_FLAG_SLAVE_POSS
| ATA_FLAG_NO_LEGACY
,
165 .pio_mask
= ATA_PIO4
,
167 .udma_mask
= ATA_UDMA6
,
168 .port_ops
= &vt6421_pata_ops
,
171 static struct ata_port_info vt8251_port_info
= {
172 .flags
= ATA_FLAG_SATA
| ATA_FLAG_SLAVE_POSS
|
174 .pio_mask
= ATA_PIO4
,
175 .mwdma_mask
= ATA_MWDMA2
,
176 .udma_mask
= ATA_UDMA6
,
177 .port_ops
= &vt8251_ops
,
180 MODULE_AUTHOR("Jeff Garzik");
181 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
182 MODULE_LICENSE("GPL");
183 MODULE_DEVICE_TABLE(pci
, svia_pci_tbl
);
184 MODULE_VERSION(DRV_VERSION
);
186 static int svia_scr_read(struct ata_link
*link
, unsigned int sc_reg
, u32
*val
)
188 if (sc_reg
> SCR_CONTROL
)
190 *val
= ioread32(link
->ap
->ioaddr
.scr_addr
+ (4 * sc_reg
));
194 static int svia_scr_write(struct ata_link
*link
, unsigned int sc_reg
, u32 val
)
196 if (sc_reg
> SCR_CONTROL
)
198 iowrite32(val
, link
->ap
->ioaddr
.scr_addr
+ (4 * sc_reg
));
202 static int vt8251_scr_read(struct ata_link
*link
, unsigned int scr
, u32
*val
)
204 static const u8 ipm_tbl
[] = { 1, 2, 6, 0 };
205 struct pci_dev
*pdev
= to_pci_dev(link
->ap
->host
->dev
);
206 int slot
= 2 * link
->ap
->port_no
+ link
->pmp
;
212 pci_read_config_byte(pdev
, 0xA0 + slot
, &raw
);
214 /* read the DET field, bit0 and 1 of the config byte */
217 /* read the SPD field, bit4 of the configure byte */
223 /* read the IPM field, bit2 and 3 of the config byte */
224 v
|= ipm_tbl
[(raw
>> 2) & 0x3];
228 /* devices other than 5287 uses 0xA8 as base */
229 WARN_ON(pdev
->device
!= 0x5287);
230 pci_read_config_dword(pdev
, 0xB0 + slot
* 4, &v
);
234 pci_read_config_byte(pdev
, 0xA4 + slot
, &raw
);
236 /* read the DET field, bit0 and bit1 */
237 v
|= ((raw
& 0x02) << 1) | (raw
& 0x01);
239 /* read the IPM field, bit2 and bit3 */
240 v
|= ((raw
>> 2) & 0x03) << 8;
251 static int vt8251_scr_write(struct ata_link
*link
, unsigned int scr
, u32 val
)
253 struct pci_dev
*pdev
= to_pci_dev(link
->ap
->host
->dev
);
254 int slot
= 2 * link
->ap
->port_no
+ link
->pmp
;
259 /* devices other than 5287 uses 0xA8 as base */
260 WARN_ON(pdev
->device
!= 0x5287);
261 pci_write_config_dword(pdev
, 0xB0 + slot
* 4, val
);
265 /* set the DET field */
266 v
|= ((val
& 0x4) >> 1) | (val
& 0x1);
268 /* set the IPM field */
269 v
|= ((val
>> 8) & 0x3) << 2;
271 pci_write_config_byte(pdev
, 0xA4 + slot
, v
);
280 * svia_tf_load - send taskfile registers to host controller
281 * @ap: Port to which output is sent
282 * @tf: ATA taskfile register set
284 * Outputs ATA taskfile to standard ATA host controller.
286 * This is to fix the internal bug of via chipsets, which will
287 * reset the device register after changing the IEN bit on ctl
290 static void svia_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
292 struct ata_taskfile ttf
;
294 if (tf
->ctl
!= ap
->last_ctl
) {
296 ttf
.flags
|= ATA_TFLAG_DEVICE
;
299 ata_sff_tf_load(ap
, tf
);
302 static void svia_noop_freeze(struct ata_port
*ap
)
304 /* Some VIA controllers choke if ATA_NIEN is manipulated in
305 * certain way. Leave it alone and just clear pending IRQ.
307 ap
->ops
->sff_check_status(ap
);
308 ata_sff_irq_clear(ap
);
312 * vt6420_prereset - prereset for vt6420
313 * @link: target ATA link
314 * @deadline: deadline jiffies for the operation
316 * SCR registers on vt6420 are pieces of shit and may hang the
317 * whole machine completely if accessed with the wrong timing.
318 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
319 * access operations, but uses SStatus and SControl only during
320 * boot probing in controlled way.
322 * As the old (pre EH update) probing code is proven to work, we
323 * strictly follow the access pattern.
326 * Kernel thread context (may sleep)
329 * 0 on success, -errno otherwise.
331 static int vt6420_prereset(struct ata_link
*link
, unsigned long deadline
)
333 struct ata_port
*ap
= link
->ap
;
334 struct ata_eh_context
*ehc
= &ap
->link
.eh_context
;
335 unsigned long timeout
= jiffies
+ (HZ
* 5);
336 u32 sstatus
, scontrol
;
339 /* don't do any SCR stuff if we're not loading */
340 if (!(ap
->pflags
& ATA_PFLAG_LOADING
))
343 /* Resume phy. This is the old SATA resume sequence */
344 svia_scr_write(link
, SCR_CONTROL
, 0x300);
345 svia_scr_read(link
, SCR_CONTROL
, &scontrol
); /* flush */
347 /* wait for phy to become ready, if necessary */
350 svia_scr_read(link
, SCR_STATUS
, &sstatus
);
351 if ((sstatus
& 0xf) != 1)
353 } while (time_before(jiffies
, timeout
));
355 /* open code sata_print_link_status() */
356 svia_scr_read(link
, SCR_STATUS
, &sstatus
);
357 svia_scr_read(link
, SCR_CONTROL
, &scontrol
);
359 online
= (sstatus
& 0xf) == 0x3;
361 ata_port_printk(ap
, KERN_INFO
,
362 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
363 online
? "up" : "down", sstatus
, scontrol
);
365 /* SStatus is read one more time */
366 svia_scr_read(link
, SCR_STATUS
, &sstatus
);
369 /* tell EH to bail */
370 ehc
->i
.action
&= ~ATA_EH_RESET
;
376 ata_sff_wait_ready(link
, deadline
);
381 static int vt6421_pata_cable_detect(struct ata_port
*ap
)
383 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
386 pci_read_config_byte(pdev
, PATA_UDMA_TIMING
, &tmp
);
388 return ATA_CBL_PATA40
;
389 return ATA_CBL_PATA80
;
392 static void vt6421_set_pio_mode(struct ata_port
*ap
, struct ata_device
*adev
)
394 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
395 static const u8 pio_bits
[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
396 pci_write_config_byte(pdev
, PATA_PIO_TIMING
, pio_bits
[adev
->pio_mode
- XFER_PIO_0
]);
399 static void vt6421_set_dma_mode(struct ata_port
*ap
, struct ata_device
*adev
)
401 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
402 static const u8 udma_bits
[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
403 pci_write_config_byte(pdev
, PATA_UDMA_TIMING
, udma_bits
[adev
->dma_mode
- XFER_UDMA_0
]);
406 static const unsigned int svia_bar_sizes
[] = {
410 static const unsigned int vt6421_bar_sizes
[] = {
411 16, 16, 16, 16, 32, 128
414 static void __iomem
*svia_scr_addr(void __iomem
*addr
, unsigned int port
)
416 return addr
+ (port
* 128);
419 static void __iomem
*vt6421_scr_addr(void __iomem
*addr
, unsigned int port
)
421 return addr
+ (port
* 64);
424 static void vt6421_init_addrs(struct ata_port
*ap
)
426 void __iomem
* const * iomap
= ap
->host
->iomap
;
427 void __iomem
*reg_addr
= iomap
[ap
->port_no
];
428 void __iomem
*bmdma_addr
= iomap
[4] + (ap
->port_no
* 8);
429 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
431 ioaddr
->cmd_addr
= reg_addr
;
432 ioaddr
->altstatus_addr
=
433 ioaddr
->ctl_addr
= (void __iomem
*)
434 ((unsigned long)(reg_addr
+ 8) | ATA_PCI_CTL_OFS
);
435 ioaddr
->bmdma_addr
= bmdma_addr
;
436 ioaddr
->scr_addr
= vt6421_scr_addr(iomap
[5], ap
->port_no
);
438 ata_sff_std_ports(ioaddr
);
440 ata_port_pbar_desc(ap
, ap
->port_no
, -1, "port");
441 ata_port_pbar_desc(ap
, 4, ap
->port_no
* 8, "bmdma");
444 static int vt6420_prepare_host(struct pci_dev
*pdev
, struct ata_host
**r_host
)
446 const struct ata_port_info
*ppi
[] = { &vt6420_port_info
, NULL
};
447 struct ata_host
*host
;
450 rc
= ata_pci_sff_prepare_host(pdev
, ppi
, &host
);
455 rc
= pcim_iomap_regions(pdev
, 1 << 5, DRV_NAME
);
457 dev_printk(KERN_ERR
, &pdev
->dev
, "failed to iomap PCI BAR 5\n");
461 host
->ports
[0]->ioaddr
.scr_addr
= svia_scr_addr(host
->iomap
[5], 0);
462 host
->ports
[1]->ioaddr
.scr_addr
= svia_scr_addr(host
->iomap
[5], 1);
467 static int vt6421_prepare_host(struct pci_dev
*pdev
, struct ata_host
**r_host
)
469 const struct ata_port_info
*ppi
[] =
470 { &vt6421_sport_info
, &vt6421_sport_info
, &vt6421_pport_info
};
471 struct ata_host
*host
;
474 *r_host
= host
= ata_host_alloc_pinfo(&pdev
->dev
, ppi
, ARRAY_SIZE(ppi
));
476 dev_printk(KERN_ERR
, &pdev
->dev
, "failed to allocate host\n");
480 rc
= pcim_iomap_regions(pdev
, 0x3f, DRV_NAME
);
482 dev_printk(KERN_ERR
, &pdev
->dev
, "failed to request/iomap "
483 "PCI BARs (errno=%d)\n", rc
);
486 host
->iomap
= pcim_iomap_table(pdev
);
488 for (i
= 0; i
< host
->n_ports
; i
++)
489 vt6421_init_addrs(host
->ports
[i
]);
491 rc
= pci_set_dma_mask(pdev
, ATA_DMA_MASK
);
494 rc
= pci_set_consistent_dma_mask(pdev
, ATA_DMA_MASK
);
501 static int vt8251_prepare_host(struct pci_dev
*pdev
, struct ata_host
**r_host
)
503 const struct ata_port_info
*ppi
[] = { &vt8251_port_info
, NULL
};
504 struct ata_host
*host
;
507 rc
= ata_pci_sff_prepare_host(pdev
, ppi
, &host
);
512 rc
= pcim_iomap_regions(pdev
, 1 << 5, DRV_NAME
);
514 dev_printk(KERN_ERR
, &pdev
->dev
, "failed to iomap PCI BAR 5\n");
518 /* 8251 hosts four sata ports as M/S of the two channels */
519 for (i
= 0; i
< host
->n_ports
; i
++)
520 ata_slave_link_init(host
->ports
[i
]);
525 static void svia_configure(struct pci_dev
*pdev
)
529 pci_read_config_byte(pdev
, PCI_INTERRUPT_LINE
, &tmp8
);
530 dev_printk(KERN_INFO
, &pdev
->dev
, "routed to hard irq line %d\n",
531 (int) (tmp8
& 0xf0) == 0xf0 ? 0 : tmp8
& 0x0f);
533 /* make sure SATA channels are enabled */
534 pci_read_config_byte(pdev
, SATA_CHAN_ENAB
, &tmp8
);
535 if ((tmp8
& ALL_PORTS
) != ALL_PORTS
) {
536 dev_printk(KERN_DEBUG
, &pdev
->dev
,
537 "enabling SATA channels (0x%x)\n",
540 pci_write_config_byte(pdev
, SATA_CHAN_ENAB
, tmp8
);
543 /* make sure interrupts for each channel sent to us */
544 pci_read_config_byte(pdev
, SATA_INT_GATE
, &tmp8
);
545 if ((tmp8
& ALL_PORTS
) != ALL_PORTS
) {
546 dev_printk(KERN_DEBUG
, &pdev
->dev
,
547 "enabling SATA channel interrupts (0x%x)\n",
550 pci_write_config_byte(pdev
, SATA_INT_GATE
, tmp8
);
553 /* make sure native mode is enabled */
554 pci_read_config_byte(pdev
, SATA_NATIVE_MODE
, &tmp8
);
555 if ((tmp8
& NATIVE_MODE_ALL
) != NATIVE_MODE_ALL
) {
556 dev_printk(KERN_DEBUG
, &pdev
->dev
,
557 "enabling SATA channel native mode (0x%x)\n",
559 tmp8
|= NATIVE_MODE_ALL
;
560 pci_write_config_byte(pdev
, SATA_NATIVE_MODE
, tmp8
);
564 static int svia_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
566 static int printed_version
;
569 struct ata_host
*host
;
570 int board_id
= (int) ent
->driver_data
;
571 const unsigned *bar_sizes
;
573 if (!printed_version
++)
574 dev_printk(KERN_DEBUG
, &pdev
->dev
, "version " DRV_VERSION
"\n");
576 rc
= pcim_enable_device(pdev
);
580 if (board_id
== vt6421
)
581 bar_sizes
= &vt6421_bar_sizes
[0];
583 bar_sizes
= &svia_bar_sizes
[0];
585 for (i
= 0; i
< ARRAY_SIZE(svia_bar_sizes
); i
++)
586 if ((pci_resource_start(pdev
, i
) == 0) ||
587 (pci_resource_len(pdev
, i
) < bar_sizes
[i
])) {
588 dev_printk(KERN_ERR
, &pdev
->dev
,
589 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
591 (unsigned long long)pci_resource_start(pdev
, i
),
592 (unsigned long long)pci_resource_len(pdev
, i
));
598 rc
= vt6420_prepare_host(pdev
, &host
);
601 rc
= vt6421_prepare_host(pdev
, &host
);
604 rc
= vt8251_prepare_host(pdev
, &host
);
612 svia_configure(pdev
);
614 pci_set_master(pdev
);
615 return ata_host_activate(host
, pdev
->irq
, ata_sff_interrupt
,
616 IRQF_SHARED
, &svia_sht
);
619 static int __init
svia_init(void)
621 return pci_register_driver(&svia_pci_driver
);
624 static void __exit
svia_exit(void)
626 pci_unregister_driver(&svia_pci_driver
);
629 module_init(svia_init
);
630 module_exit(svia_exit
);