2 * Libata driver for the highpoint 372N and 302N UDMA66 ATA controllers.
4 * This driver is heavily based upon:
6 * linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
8 * Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
9 * Portions Copyright (C) 2001 Sun Microsystems, Inc.
10 * Portions Copyright (C) 2003 Red Hat Inc
11 * Portions Copyright (C) 2005-2007 MontaVista Software, Inc.
15 * Work out best PLL policy
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/pci.h>
21 #include <linux/init.h>
22 #include <linux/blkdev.h>
23 #include <linux/delay.h>
24 #include <scsi/scsi_host.h>
25 #include <linux/libata.h>
27 #define DRV_NAME "pata_hpt3x2n"
28 #define DRV_VERSION "0.3.7"
31 HPT_PCI_FAST
= (1 << 31),
43 struct hpt_clock
*clocks
[3];
46 /* key for bus clock timings
48 * 0:3 data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
49 * DMA. cycles = value + 1
50 * 4:8 data_low_time. active time of DIOW_/DIOR_ for PIO and MW
51 * DMA. cycles = value + 1
52 * 9:12 cmd_high_time. inactive time of DIOW_/DIOR_ during task file
54 * 13:17 cmd_low_time. active time of DIOW_/DIOR_ during task file
56 * 18:21 udma_cycle_time. clock freq and clock cycles for UDMA xfer.
57 * during task file register access.
58 * 22:24 pre_high_time. time to initialize 1st cycle for PIO and MW DMA
60 * 25:27 cmd_pre_high_time. time to initialize 1st PIO cycle for task
64 * 30 PIO_MST enable. if set, the chip is in bus master mode during
69 /* 66MHz DPLL clocks */
71 static struct hpt_clock hpt3x2n_clocks
[] = {
72 { XFER_UDMA_7
, 0x1c869c62 },
73 { XFER_UDMA_6
, 0x1c869c62 },
74 { XFER_UDMA_5
, 0x1c8a9c62 },
75 { XFER_UDMA_4
, 0x1c8a9c62 },
76 { XFER_UDMA_3
, 0x1c8e9c62 },
77 { XFER_UDMA_2
, 0x1c929c62 },
78 { XFER_UDMA_1
, 0x1c9a9c62 },
79 { XFER_UDMA_0
, 0x1c829c62 },
81 { XFER_MW_DMA_2
, 0x2c829c62 },
82 { XFER_MW_DMA_1
, 0x2c829c66 },
83 { XFER_MW_DMA_0
, 0x2c829d2e },
85 { XFER_PIO_4
, 0x0c829c62 },
86 { XFER_PIO_3
, 0x0c829c84 },
87 { XFER_PIO_2
, 0x0c829ca6 },
88 { XFER_PIO_1
, 0x0d029d26 },
89 { XFER_PIO_0
, 0x0d029d5e },
93 * hpt3x2n_find_mode - reset the hpt3x2n bus
95 * @speed: transfer mode
97 * Return the 32bit register programming information for this channel
98 * that matches the speed provided. For the moment the clocks table
99 * is hard coded but easy to change. This will be needed if we use
103 static u32
hpt3x2n_find_mode(struct ata_port
*ap
, int speed
)
105 struct hpt_clock
*clocks
= hpt3x2n_clocks
;
107 while(clocks
->xfer_speed
) {
108 if (clocks
->xfer_speed
== speed
)
109 return clocks
->timing
;
113 return 0xffffffffU
; /* silence compiler warning */
117 * hpt3x2n_cable_detect - Detect the cable type
118 * @ap: ATA port to detect on
120 * Return the cable type attached to this port
123 static int hpt3x2n_cable_detect(struct ata_port
*ap
)
126 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
128 pci_read_config_byte(pdev
, 0x5B, &scr2
);
129 pci_write_config_byte(pdev
, 0x5B, scr2
& ~0x01);
131 udelay(10); /* debounce */
133 /* Cable register now active */
134 pci_read_config_byte(pdev
, 0x5A, &ata66
);
136 pci_write_config_byte(pdev
, 0x5B, scr2
);
138 if (ata66
& (2 >> ap
->port_no
))
139 return ATA_CBL_PATA40
;
141 return ATA_CBL_PATA80
;
145 * hpt3x2n_pre_reset - reset the hpt3x2n bus
146 * @link: ATA link to reset
147 * @deadline: deadline jiffies for the operation
149 * Perform the initial reset handling for the 3x2n series controllers.
150 * Reset the hardware and state machine,
153 static int hpt3x2n_pre_reset(struct ata_link
*link
, unsigned long deadline
)
155 struct ata_port
*ap
= link
->ap
;
156 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
157 /* Reset the state machine */
158 pci_write_config_byte(pdev
, 0x50 + 4 * ap
->port_no
, 0x37);
161 return ata_sff_prereset(link
, deadline
);
165 * hpt3x2n_set_piomode - PIO setup
167 * @adev: device on the interface
169 * Perform PIO mode setup.
172 static void hpt3x2n_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
174 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
180 addr1
= 0x40 + 4 * (adev
->devno
+ 2 * ap
->port_no
);
181 addr2
= 0x51 + 4 * ap
->port_no
;
183 /* Fast interrupt prediction disable, hold off interrupt disable */
184 pci_read_config_byte(pdev
, addr2
, &fast
);
186 pci_write_config_byte(pdev
, addr2
, fast
);
188 pci_read_config_dword(pdev
, addr1
, ®
);
189 mode
= hpt3x2n_find_mode(ap
, adev
->pio_mode
);
190 mode
&= 0xCFC3FFFF; /* Leave DMA bits alone */
191 reg
&= ~0xCFC3FFFF; /* Strip timing bits */
192 pci_write_config_dword(pdev
, addr1
, reg
| mode
);
196 * hpt3x2n_set_dmamode - DMA timing setup
198 * @adev: Device being configured
200 * Set up the channel for MWDMA or UDMA modes. Much the same as with
201 * PIO, load the mode number and then set MWDMA or UDMA flag.
204 static void hpt3x2n_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
206 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
211 addr1
= 0x40 + 4 * (adev
->devno
+ 2 * ap
->port_no
);
212 addr2
= 0x51 + 4 * ap
->port_no
;
214 /* Fast interrupt prediction disable, hold off interrupt disable */
215 pci_read_config_byte(pdev
, addr2
, &fast
);
217 pci_write_config_byte(pdev
, addr2
, fast
);
219 mask
= adev
->dma_mode
< XFER_UDMA_0
? 0x31C001FF : 0x303C0000;
221 pci_read_config_dword(pdev
, addr1
, ®
);
222 mode
= hpt3x2n_find_mode(ap
, adev
->dma_mode
);
225 pci_write_config_dword(pdev
, addr1
, reg
| mode
);
229 * hpt3x2n_bmdma_end - DMA engine stop
232 * Clean up after the HPT3x2n and later DMA engine
235 static void hpt3x2n_bmdma_stop(struct ata_queued_cmd
*qc
)
237 struct ata_port
*ap
= qc
->ap
;
238 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
239 int mscreg
= 0x50 + 2 * ap
->port_no
;
240 u8 bwsr_stat
, msc_stat
;
242 pci_read_config_byte(pdev
, 0x6A, &bwsr_stat
);
243 pci_read_config_byte(pdev
, mscreg
, &msc_stat
);
244 if (bwsr_stat
& (1 << ap
->port_no
))
245 pci_write_config_byte(pdev
, mscreg
, msc_stat
| 0x30);
250 * hpt3x2n_set_clock - clock control
252 * @source: 0x21 or 0x23 for PLL or PCI sourced clock
254 * Switch the ATA bus clock between the PLL and PCI clock sources
255 * while correctly isolating the bus and resetting internal logic
257 * We must use the DPLL for
259 * - second channel UDMA7 (SATA ports) or higher
262 * or we will underclock the device and get reduced performance.
265 static void hpt3x2n_set_clock(struct ata_port
*ap
, int source
)
267 void __iomem
*bmdma
= ap
->ioaddr
.bmdma_addr
;
269 /* Tristate the bus */
270 iowrite8(0x80, bmdma
+0x73);
271 iowrite8(0x80, bmdma
+0x77);
273 /* Switch clock and reset channels */
274 iowrite8(source
, bmdma
+0x7B);
275 iowrite8(0xC0, bmdma
+0x79);
277 /* Reset state machines */
278 iowrite8(0x37, bmdma
+0x70);
279 iowrite8(0x37, bmdma
+0x74);
282 iowrite8(0x00, bmdma
+0x79);
284 /* Reconnect channels to bus */
285 iowrite8(0x00, bmdma
+0x73);
286 iowrite8(0x00, bmdma
+0x77);
289 /* Check if our partner interface is busy */
291 static int hpt3x2n_pair_idle(struct ata_port
*ap
)
293 struct ata_host
*host
= ap
->host
;
294 struct ata_port
*pair
= host
->ports
[ap
->port_no
^ 1];
296 if (pair
->hsm_task_state
== HSM_ST_IDLE
)
301 static int hpt3x2n_use_dpll(struct ata_port
*ap
, int writing
)
303 long flags
= (long)ap
->host
->private_data
;
304 /* See if we should use the DPLL */
306 return USE_DPLL
; /* Needed for write */
308 return USE_DPLL
; /* Needed at 66Mhz */
312 static unsigned int hpt3x2n_qc_issue(struct ata_queued_cmd
*qc
)
314 struct ata_taskfile
*tf
= &qc
->tf
;
315 struct ata_port
*ap
= qc
->ap
;
316 int flags
= (long)ap
->host
->private_data
;
318 if (hpt3x2n_pair_idle(ap
)) {
319 int dpll
= hpt3x2n_use_dpll(ap
, (tf
->flags
& ATA_TFLAG_WRITE
));
320 if ((flags
& USE_DPLL
) != dpll
) {
322 hpt3x2n_set_clock(ap
, 0x21);
324 hpt3x2n_set_clock(ap
, 0x23);
327 return ata_sff_qc_issue(qc
);
330 static struct scsi_host_template hpt3x2n_sht
= {
331 ATA_BMDMA_SHT(DRV_NAME
),
335 * Configuration for HPT3x2n.
338 static struct ata_port_operations hpt3x2n_port_ops
= {
339 .inherits
= &ata_bmdma_port_ops
,
341 .bmdma_stop
= hpt3x2n_bmdma_stop
,
342 .qc_issue
= hpt3x2n_qc_issue
,
344 .cable_detect
= hpt3x2n_cable_detect
,
345 .set_piomode
= hpt3x2n_set_piomode
,
346 .set_dmamode
= hpt3x2n_set_dmamode
,
347 .prereset
= hpt3x2n_pre_reset
,
351 * hpt3xn_calibrate_dpll - Calibrate the DPLL loop
354 * Perform a calibration cycle on the HPT3xN DPLL. Returns 1 if this
358 static int hpt3xn_calibrate_dpll(struct pci_dev
*dev
)
364 for(tries
= 0; tries
< 0x5000; tries
++) {
366 pci_read_config_byte(dev
, 0x5b, ®5b
);
368 /* See if it stays set */
369 for(tries
= 0; tries
< 0x1000; tries
++) {
370 pci_read_config_byte(dev
, 0x5b, ®5b
);
372 if ((reg5b
& 0x80) == 0)
375 /* Turn off tuning, we have the DPLL set */
376 pci_read_config_dword(dev
, 0x5c, ®5c
);
377 pci_write_config_dword(dev
, 0x5c, reg5c
& ~ 0x100);
381 /* Never went stable */
385 static int hpt3x2n_pci_clock(struct pci_dev
*pdev
)
389 unsigned long iobase
= pci_resource_start(pdev
, 4);
391 fcnt
= inl(iobase
+ 0x90); /* Not PCI readable for some chips */
392 if ((fcnt
>> 12) != 0xABCDE) {
393 printk(KERN_WARNING
"hpt3xn: BIOS clock data not set.\n");
394 return 33; /* Not BIOS set */
398 freq
= (fcnt
* 77) / 192;
411 * hpt3x2n_init_one - Initialise an HPT37X/302
413 * @id: Entry in match table
415 * Initialise an HPT3x2n device. There are some interesting complications
416 * here. Firstly the chip may report 366 and be one of several variants.
417 * Secondly all the timings depend on the clock for the chip which we must
420 * This is the known chip mappings. It may be missing a couple of later
423 * Chip version PCI Rev Notes
424 * HPT372 4 (HPT366) 5 Other driver
425 * HPT372N 4 (HPT366) 6 UDMA133
426 * HPT372 5 (HPT372) 1 Other driver
427 * HPT372N 5 (HPT372) 2 UDMA133
428 * HPT302 6 (HPT302) * Other driver
429 * HPT302N 6 (HPT302) > 1 UDMA133
430 * HPT371 7 (HPT371) * Other driver
431 * HPT371N 7 (HPT371) > 1 UDMA133
432 * HPT374 8 (HPT374) * Other driver
433 * HPT372N 9 (HPT372N) * UDMA133
435 * (1) UDMA133 support depends on the bus clock
437 * To pin down HPT371N
440 static int hpt3x2n_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
442 /* HPT372N and friends - UDMA133 */
443 static const struct ata_port_info info
= {
444 .flags
= ATA_FLAG_SLAVE_POSS
,
445 .pio_mask
= ATA_PIO4
,
446 .mwdma_mask
= ATA_MWDMA2
,
447 .udma_mask
= ATA_UDMA6
,
448 .port_ops
= &hpt3x2n_port_ops
450 const struct ata_port_info
*ppi
[] = { &info
, NULL
};
451 u8 rev
= dev
->revision
;
453 unsigned int pci_mhz
;
454 unsigned int f_low
, f_high
;
456 unsigned long iobase
= pci_resource_start(dev
, 4);
460 rc
= pcim_enable_device(dev
);
464 switch(dev
->device
) {
465 case PCI_DEVICE_ID_TTI_HPT366
:
469 case PCI_DEVICE_ID_TTI_HPT371
:
472 /* 371N if rev > 1 */
474 case PCI_DEVICE_ID_TTI_HPT372
:
475 /* 372N if rev >= 2*/
479 case PCI_DEVICE_ID_TTI_HPT302
:
483 case PCI_DEVICE_ID_TTI_HPT372N
:
486 printk(KERN_ERR
"pata_hpt3x2n: PCI table is bogus please report (%d).\n", dev
->device
);
490 /* Ok so this is a chip we support */
492 pci_write_config_byte(dev
, PCI_CACHE_LINE_SIZE
, (L1_CACHE_BYTES
/ 4));
493 pci_write_config_byte(dev
, PCI_LATENCY_TIMER
, 0x78);
494 pci_write_config_byte(dev
, PCI_MIN_GNT
, 0x08);
495 pci_write_config_byte(dev
, PCI_MAX_LAT
, 0x08);
497 pci_read_config_byte(dev
, 0x5A, &irqmask
);
499 pci_write_config_byte(dev
, 0x5a, irqmask
);
502 * HPT371 chips physically have only one channel, the secondary one,
503 * but the primary channel registers do exist! Go figure...
504 * So, we manually disable the non-existing channel here
505 * (if the BIOS hasn't done this already).
507 if (dev
->device
== PCI_DEVICE_ID_TTI_HPT371
) {
509 pci_read_config_byte(dev
, 0x50, &mcr1
);
511 pci_write_config_byte(dev
, 0x50, mcr1
);
514 /* Tune the PLL. HPT recommend using 75 for SATA, 66 for UDMA133 or
515 50 for UDMA100. Right now we always use 66 */
517 pci_mhz
= hpt3x2n_pci_clock(dev
);
519 f_low
= (pci_mhz
* 48) / 66; /* PCI Mhz for 66Mhz DPLL */
520 f_high
= f_low
+ 2; /* Tolerance */
522 pci_write_config_dword(dev
, 0x5C, (f_high
<< 16) | f_low
| 0x100);
524 pci_write_config_byte(dev
, 0x5B, 0x21);
526 /* Unlike the 37x we don't try jiggling the frequency */
527 for(adjust
= 0; adjust
< 8; adjust
++) {
528 if (hpt3xn_calibrate_dpll(dev
))
530 pci_write_config_dword(dev
, 0x5C, (f_high
<< 16) | f_low
);
533 printk(KERN_ERR
"pata_hpt3x2n: DPLL did not stabilize!\n");
537 printk(KERN_INFO
"pata_hpt37x: bus clock %dMHz, using 66MHz DPLL.\n",
539 /* Set our private data up. We only need a few flags so we use
542 hpriv
= (void *)PCI66
;
544 * On HPT371N, if ATA clock is 66 MHz we must set bit 2 in
545 * the MISC. register to stretch the UltraDMA Tss timing.
546 * NOTE: This register is only writeable via I/O space.
548 if (dev
->device
== PCI_DEVICE_ID_TTI_HPT371
)
549 outb(inb(iobase
+ 0x9c) | 0x04, iobase
+ 0x9c);
552 /* Now kick off ATA set up */
553 return ata_pci_sff_init_one(dev
, ppi
, &hpt3x2n_sht
, hpriv
);
556 static const struct pci_device_id hpt3x2n
[] = {
557 { PCI_VDEVICE(TTI
, PCI_DEVICE_ID_TTI_HPT366
), },
558 { PCI_VDEVICE(TTI
, PCI_DEVICE_ID_TTI_HPT371
), },
559 { PCI_VDEVICE(TTI
, PCI_DEVICE_ID_TTI_HPT372
), },
560 { PCI_VDEVICE(TTI
, PCI_DEVICE_ID_TTI_HPT302
), },
561 { PCI_VDEVICE(TTI
, PCI_DEVICE_ID_TTI_HPT372N
), },
566 static struct pci_driver hpt3x2n_pci_driver
= {
569 .probe
= hpt3x2n_init_one
,
570 .remove
= ata_pci_remove_one
573 static int __init
hpt3x2n_init(void)
575 return pci_register_driver(&hpt3x2n_pci_driver
);
578 static void __exit
hpt3x2n_exit(void)
580 pci_unregister_driver(&hpt3x2n_pci_driver
);
583 MODULE_AUTHOR("Alan Cox");
584 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT3x2n/30x");
585 MODULE_LICENSE("GPL");
586 MODULE_DEVICE_TABLE(pci
, hpt3x2n
);
587 MODULE_VERSION(DRV_VERSION
);
589 module_init(hpt3x2n_init
);
590 module_exit(hpt3x2n_exit
);