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, 0x2c829d2c },
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 },
94 * hpt3x2n_find_mode - reset the hpt3x2n bus
96 * @speed: transfer mode
98 * Return the 32bit register programming information for this channel
99 * that matches the speed provided. For the moment the clocks table
100 * is hard coded but easy to change. This will be needed if we use
104 static u32 hpt3x2n_find_mode(struct ata_port *ap, int speed)
106 struct hpt_clock *clocks = hpt3x2n_clocks;
108 while(clocks->xfer_speed) {
109 if (clocks->xfer_speed == speed)
110 return clocks->timing;
114 return 0xffffffffU; /* silence compiler warning */
118 * hpt3x2n_cable_detect - Detect the cable type
119 * @ap: ATA port to detect on
121 * Return the cable type attached to this port
124 static int hpt3x2n_cable_detect(struct ata_port *ap)
127 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
129 pci_read_config_byte(pdev, 0x5B, &scr2);
130 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
131 /* Cable register now active */
132 pci_read_config_byte(pdev, 0x5A, &ata66);
134 pci_write_config_byte(pdev, 0x5B, scr2);
136 if (ata66 & (1 << ap->port_no))
137 return ATA_CBL_PATA40;
139 return ATA_CBL_PATA80;
143 * hpt3x2n_pre_reset - reset the hpt3x2n bus
144 * @link: ATA link to reset
145 * @deadline: deadline jiffies for the operation
147 * Perform the initial reset handling for the 3x2n series controllers.
148 * Reset the hardware and state machine,
151 static int hpt3x2n_pre_reset(struct ata_link *link, unsigned long deadline)
153 struct ata_port *ap = link->ap;
154 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
155 /* Reset the state machine */
156 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
159 return ata_sff_prereset(link, deadline);
163 * hpt3x2n_set_piomode - PIO setup
165 * @adev: device on the interface
167 * Perform PIO mode setup.
170 static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
172 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
178 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
179 addr2 = 0x51 + 4 * ap->port_no;
181 /* Fast interrupt prediction disable, hold off interrupt disable */
182 pci_read_config_byte(pdev, addr2, &fast);
184 pci_write_config_byte(pdev, addr2, fast);
186 pci_read_config_dword(pdev, addr1, ®);
187 mode = hpt3x2n_find_mode(ap, adev->pio_mode);
188 mode &= 0xCFC3FFFF; /* Leave DMA bits alone */
189 reg &= ~0xCFC3FFFF; /* Strip timing bits */
190 pci_write_config_dword(pdev, addr1, reg | mode);
194 * hpt3x2n_set_dmamode - DMA timing setup
196 * @adev: Device being configured
198 * Set up the channel for MWDMA or UDMA modes. Much the same as with
199 * PIO, load the mode number and then set MWDMA or UDMA flag.
202 static void hpt3x2n_set_dmamode(struct ata_port *ap, struct ata_device *adev)
204 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
209 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
210 addr2 = 0x51 + 4 * ap->port_no;
212 /* Fast interrupt prediction disable, hold off interrupt disable */
213 pci_read_config_byte(pdev, addr2, &fast);
215 pci_write_config_byte(pdev, addr2, fast);
217 mask = adev->dma_mode < XFER_UDMA_0 ? 0x31C001FF : 0x303C0000;
219 pci_read_config_dword(pdev, addr1, ®);
220 mode = hpt3x2n_find_mode(ap, adev->dma_mode);
223 pci_write_config_dword(pdev, addr1, reg | mode);
227 * hpt3x2n_bmdma_end - DMA engine stop
230 * Clean up after the HPT3x2n and later DMA engine
233 static void hpt3x2n_bmdma_stop(struct ata_queued_cmd *qc)
235 struct ata_port *ap = qc->ap;
236 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
237 int mscreg = 0x50 + 2 * ap->port_no;
238 u8 bwsr_stat, msc_stat;
240 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
241 pci_read_config_byte(pdev, mscreg, &msc_stat);
242 if (bwsr_stat & (1 << ap->port_no))
243 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
248 * hpt3x2n_set_clock - clock control
250 * @source: 0x21 or 0x23 for PLL or PCI sourced clock
252 * Switch the ATA bus clock between the PLL and PCI clock sources
253 * while correctly isolating the bus and resetting internal logic
255 * We must use the DPLL for
257 * - second channel UDMA7 (SATA ports) or higher
260 * or we will underclock the device and get reduced performance.
263 static void hpt3x2n_set_clock(struct ata_port *ap, int source)
265 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
267 /* Tristate the bus */
268 iowrite8(0x80, bmdma+0x73);
269 iowrite8(0x80, bmdma+0x77);
271 /* Switch clock and reset channels */
272 iowrite8(source, bmdma+0x7B);
273 iowrite8(0xC0, bmdma+0x79);
275 /* Reset state machines */
276 iowrite8(0x37, bmdma+0x70);
277 iowrite8(0x37, bmdma+0x74);
280 iowrite8(0x00, bmdma+0x79);
282 /* Reconnect channels to bus */
283 iowrite8(0x00, bmdma+0x73);
284 iowrite8(0x00, bmdma+0x77);
287 /* Check if our partner interface is busy */
289 static int hpt3x2n_pair_idle(struct ata_port *ap)
291 struct ata_host *host = ap->host;
292 struct ata_port *pair = host->ports[ap->port_no ^ 1];
294 if (pair->hsm_task_state == HSM_ST_IDLE)
299 static int hpt3x2n_use_dpll(struct ata_port *ap, int writing)
301 long flags = (long)ap->host->private_data;
302 /* See if we should use the DPLL */
304 return USE_DPLL; /* Needed for write */
306 return USE_DPLL; /* Needed at 66Mhz */
310 static unsigned int hpt3x2n_qc_issue(struct ata_queued_cmd *qc)
312 struct ata_taskfile *tf = &qc->tf;
313 struct ata_port *ap = qc->ap;
314 int flags = (long)ap->host->private_data;
316 if (hpt3x2n_pair_idle(ap)) {
317 int dpll = hpt3x2n_use_dpll(ap, (tf->flags & ATA_TFLAG_WRITE));
318 if ((flags & USE_DPLL) != dpll) {
320 hpt3x2n_set_clock(ap, 0x21);
322 hpt3x2n_set_clock(ap, 0x23);
325 return ata_sff_qc_issue(qc);
328 static struct scsi_host_template hpt3x2n_sht = {
329 ATA_BMDMA_SHT(DRV_NAME),
333 * Configuration for HPT3x2n.
336 static struct ata_port_operations hpt3x2n_port_ops = {
337 .inherits = &ata_bmdma_port_ops,
339 .bmdma_stop = hpt3x2n_bmdma_stop,
340 .qc_issue = hpt3x2n_qc_issue,
342 .cable_detect = hpt3x2n_cable_detect,
343 .set_piomode = hpt3x2n_set_piomode,
344 .set_dmamode = hpt3x2n_set_dmamode,
345 .prereset = hpt3x2n_pre_reset,
349 * hpt3xn_calibrate_dpll - Calibrate the DPLL loop
352 * Perform a calibration cycle on the HPT3xN DPLL. Returns 1 if this
356 static int hpt3xn_calibrate_dpll(struct pci_dev *dev)
362 for(tries = 0; tries < 0x5000; tries++) {
364 pci_read_config_byte(dev, 0x5b, ®5b);
366 /* See if it stays set */
367 for(tries = 0; tries < 0x1000; tries ++) {
368 pci_read_config_byte(dev, 0x5b, ®5b);
370 if ((reg5b & 0x80) == 0)
373 /* Turn off tuning, we have the DPLL set */
374 pci_read_config_dword(dev, 0x5c, ®5c);
375 pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
379 /* Never went stable */
383 static int hpt3x2n_pci_clock(struct pci_dev *pdev)
387 unsigned long iobase = pci_resource_start(pdev, 4);
389 fcnt = inl(iobase + 0x90); /* Not PCI readable for some chips */
390 if ((fcnt >> 12) != 0xABCDE) {
391 printk(KERN_WARNING "hpt3xn: BIOS clock data not set.\n");
392 return 33; /* Not BIOS set */
396 freq = (fcnt * 77) / 192;
409 * hpt3x2n_init_one - Initialise an HPT37X/302
411 * @id: Entry in match table
413 * Initialise an HPT3x2n device. There are some interesting complications
414 * here. Firstly the chip may report 366 and be one of several variants.
415 * Secondly all the timings depend on the clock for the chip which we must
418 * This is the known chip mappings. It may be missing a couple of later
421 * Chip version PCI Rev Notes
422 * HPT372 4 (HPT366) 5 Other driver
423 * HPT372N 4 (HPT366) 6 UDMA133
424 * HPT372 5 (HPT372) 1 Other driver
425 * HPT372N 5 (HPT372) 2 UDMA133
426 * HPT302 6 (HPT302) * Other driver
427 * HPT302N 6 (HPT302) > 1 UDMA133
428 * HPT371 7 (HPT371) * Other driver
429 * HPT371N 7 (HPT371) > 1 UDMA133
430 * HPT374 8 (HPT374) * Other driver
431 * HPT372N 9 (HPT372N) * UDMA133
433 * (1) UDMA133 support depends on the bus clock
435 * To pin down HPT371N
438 static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
440 /* HPT372N and friends - UDMA133 */
441 static const struct ata_port_info info = {
442 .flags = ATA_FLAG_SLAVE_POSS,
445 .udma_mask = ATA_UDMA6,
446 .port_ops = &hpt3x2n_port_ops
448 const struct ata_port_info *ppi[] = { &info, NULL };
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 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
467 switch(dev->device) {
468 case PCI_DEVICE_ID_TTI_HPT366:
472 case PCI_DEVICE_ID_TTI_HPT371:
475 /* 371N if rev > 1 */
477 case PCI_DEVICE_ID_TTI_HPT372:
478 /* 372N if rev >= 2*/
482 case PCI_DEVICE_ID_TTI_HPT302:
486 case PCI_DEVICE_ID_TTI_HPT372N:
489 printk(KERN_ERR "pata_hpt3x2n: PCI table is bogus please report (%d).\n", dev->device);
493 /* Ok so this is a chip we support */
495 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
496 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
497 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
498 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
500 pci_read_config_byte(dev, 0x5A, &irqmask);
502 pci_write_config_byte(dev, 0x5a, irqmask);
505 * HPT371 chips physically have only one channel, the secondary one,
506 * but the primary channel registers do exist! Go figure...
507 * So, we manually disable the non-existing channel here
508 * (if the BIOS hasn't done this already).
510 if (dev->device == PCI_DEVICE_ID_TTI_HPT371) {
512 pci_read_config_byte(dev, 0x50, &mcr1);
514 pci_write_config_byte(dev, 0x50, mcr1);
517 /* Tune the PLL. HPT recommend using 75 for SATA, 66 for UDMA133 or
518 50 for UDMA100. Right now we always use 66 */
520 pci_mhz = hpt3x2n_pci_clock(dev);
522 f_low = (pci_mhz * 48) / 66; /* PCI Mhz for 66Mhz DPLL */
523 f_high = f_low + 2; /* Tolerance */
525 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
527 pci_write_config_byte(dev, 0x5B, 0x21);
529 /* Unlike the 37x we don't try jiggling the frequency */
530 for(adjust = 0; adjust < 8; adjust++) {
531 if (hpt3xn_calibrate_dpll(dev))
533 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
536 printk(KERN_ERR "pata_hpt3x2n: DPLL did not stabilize!\n");
540 printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using 66MHz DPLL.\n",
542 /* Set our private data up. We only need a few flags so we use
545 hpriv = (void *)PCI66;
547 * On HPT371N, if ATA clock is 66 MHz we must set bit 2 in
548 * the MISC. register to stretch the UltraDMA Tss timing.
549 * NOTE: This register is only writeable via I/O space.
551 if (dev->device == PCI_DEVICE_ID_TTI_HPT371)
552 outb(inb(iobase + 0x9c) | 0x04, iobase + 0x9c);
555 /* Now kick off ATA set up */
556 return ata_pci_sff_init_one(dev, ppi, &hpt3x2n_sht, hpriv);
559 static const struct pci_device_id hpt3x2n[] = {
560 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
561 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
562 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
563 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
564 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372N), },
569 static struct pci_driver hpt3x2n_pci_driver = {
572 .probe = hpt3x2n_init_one,
573 .remove = ata_pci_remove_one
576 static int __init hpt3x2n_init(void)
578 return pci_register_driver(&hpt3x2n_pci_driver);
581 static void __exit hpt3x2n_exit(void)
583 pci_unregister_driver(&hpt3x2n_pci_driver);
586 MODULE_AUTHOR("Alan Cox");
587 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT3x2n/30x");
588 MODULE_LICENSE("GPL");
589 MODULE_DEVICE_TABLE(pci, hpt3x2n);
590 MODULE_VERSION(DRV_VERSION);
592 module_init(hpt3x2n_init);
593 module_exit(hpt3x2n_exit);