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 "0.3.4"
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);
132 udelay(10); /* debounce */
134 /* Cable register now active */
135 pci_read_config_byte(pdev, 0x5A, &ata66);
137 pci_write_config_byte(pdev, 0x5B, scr2);
139 if (ata66 & (2 >> ap->port_no))
140 return ATA_CBL_PATA40;
142 return ATA_CBL_PATA80;
146 * hpt3x2n_pre_reset - reset the hpt3x2n bus
147 * @link: ATA link to reset
148 * @deadline: deadline jiffies for the operation
150 * Perform the initial reset handling for the 3x2n series controllers.
151 * Reset the hardware and state machine,
154 static int hpt3x2n_pre_reset(struct ata_link *link, unsigned long deadline)
156 struct ata_port *ap = link->ap;
157 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
158 /* Reset the state machine */
159 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
162 return ata_sff_prereset(link, deadline);
166 * hpt3x2n_set_piomode - PIO setup
168 * @adev: device on the interface
170 * Perform PIO mode setup.
173 static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
175 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
181 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
182 addr2 = 0x51 + 4 * ap->port_no;
184 /* Fast interrupt prediction disable, hold off interrupt disable */
185 pci_read_config_byte(pdev, addr2, &fast);
187 pci_write_config_byte(pdev, addr2, fast);
189 pci_read_config_dword(pdev, addr1, ®);
190 mode = hpt3x2n_find_mode(ap, adev->pio_mode);
191 mode &= ~0x8000000; /* No FIFO in PIO */
192 mode &= ~0x30070000; /* Leave config bits alone */
193 reg &= 0x30070000; /* Strip timing bits */
194 pci_write_config_dword(pdev, addr1, reg | mode);
198 * hpt3x2n_set_dmamode - DMA timing setup
200 * @adev: Device being configured
202 * Set up the channel for MWDMA or UDMA modes. Much the same as with
203 * PIO, load the mode number and then set MWDMA or UDMA flag.
206 static void hpt3x2n_set_dmamode(struct ata_port *ap, struct ata_device *adev)
208 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
214 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
215 addr2 = 0x51 + 4 * ap->port_no;
217 /* Fast interrupt prediction disable, hold off interrupt disable */
218 pci_read_config_byte(pdev, addr2, &fast);
220 pci_write_config_byte(pdev, addr2, fast);
222 pci_read_config_dword(pdev, addr1, ®);
223 mode = hpt3x2n_find_mode(ap, adev->dma_mode);
224 mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
225 mode &= ~0xC0000000; /* Leave config bits alone */
226 reg &= 0xC0000000; /* Strip timing bits */
227 pci_write_config_dword(pdev, addr1, reg | mode);
231 * hpt3x2n_bmdma_end - DMA engine stop
234 * Clean up after the HPT3x2n and later DMA engine
237 static void hpt3x2n_bmdma_stop(struct ata_queued_cmd *qc)
239 struct ata_port *ap = qc->ap;
240 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
241 int mscreg = 0x50 + 2 * ap->port_no;
242 u8 bwsr_stat, msc_stat;
244 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
245 pci_read_config_byte(pdev, mscreg, &msc_stat);
246 if (bwsr_stat & (1 << ap->port_no))
247 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
252 * hpt3x2n_set_clock - clock control
254 * @source: 0x21 or 0x23 for PLL or PCI sourced clock
256 * Switch the ATA bus clock between the PLL and PCI clock sources
257 * while correctly isolating the bus and resetting internal logic
259 * We must use the DPLL for
261 * - second channel UDMA7 (SATA ports) or higher
264 * or we will underclock the device and get reduced performance.
267 static void hpt3x2n_set_clock(struct ata_port *ap, int source)
269 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
271 /* Tristate the bus */
272 iowrite8(0x80, bmdma+0x73);
273 iowrite8(0x80, bmdma+0x77);
275 /* Switch clock and reset channels */
276 iowrite8(source, bmdma+0x7B);
277 iowrite8(0xC0, bmdma+0x79);
279 /* Reset state machines */
280 iowrite8(0x37, bmdma+0x70);
281 iowrite8(0x37, bmdma+0x74);
284 iowrite8(0x00, bmdma+0x79);
286 /* Reconnect channels to bus */
287 iowrite8(0x00, bmdma+0x73);
288 iowrite8(0x00, bmdma+0x77);
291 /* Check if our partner interface is busy */
293 static int hpt3x2n_pair_idle(struct ata_port *ap)
295 struct ata_host *host = ap->host;
296 struct ata_port *pair = host->ports[ap->port_no ^ 1];
298 if (pair->hsm_task_state == HSM_ST_IDLE)
303 static int hpt3x2n_use_dpll(struct ata_port *ap, int writing)
305 long flags = (long)ap->host->private_data;
306 /* See if we should use the DPLL */
308 return USE_DPLL; /* Needed for write */
310 return USE_DPLL; /* Needed at 66Mhz */
314 static unsigned int hpt3x2n_qc_issue(struct ata_queued_cmd *qc)
316 struct ata_taskfile *tf = &qc->tf;
317 struct ata_port *ap = qc->ap;
318 int flags = (long)ap->host->private_data;
320 if (hpt3x2n_pair_idle(ap)) {
321 int dpll = hpt3x2n_use_dpll(ap, (tf->flags & ATA_TFLAG_WRITE));
322 if ((flags & USE_DPLL) != dpll) {
324 hpt3x2n_set_clock(ap, 0x21);
326 hpt3x2n_set_clock(ap, 0x23);
329 return ata_sff_qc_issue(qc);
332 static struct scsi_host_template hpt3x2n_sht = {
333 ATA_BMDMA_SHT(DRV_NAME),
337 * Configuration for HPT3x2n.
340 static struct ata_port_operations hpt3x2n_port_ops = {
341 .inherits = &ata_bmdma_port_ops,
343 .bmdma_stop = hpt3x2n_bmdma_stop,
344 .qc_issue = hpt3x2n_qc_issue,
346 .cable_detect = hpt3x2n_cable_detect,
347 .set_piomode = hpt3x2n_set_piomode,
348 .set_dmamode = hpt3x2n_set_dmamode,
349 .prereset = hpt3x2n_pre_reset,
353 * hpt3xn_calibrate_dpll - Calibrate the DPLL loop
356 * Perform a calibration cycle on the HPT3xN DPLL. Returns 1 if this
360 static int hpt3xn_calibrate_dpll(struct pci_dev *dev)
366 for(tries = 0; tries < 0x5000; tries++) {
368 pci_read_config_byte(dev, 0x5b, ®5b);
370 /* See if it stays set */
371 for(tries = 0; tries < 0x1000; tries ++) {
372 pci_read_config_byte(dev, 0x5b, ®5b);
374 if ((reg5b & 0x80) == 0)
377 /* Turn off tuning, we have the DPLL set */
378 pci_read_config_dword(dev, 0x5c, ®5c);
379 pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
383 /* Never went stable */
387 static int hpt3x2n_pci_clock(struct pci_dev *pdev)
391 unsigned long iobase = pci_resource_start(pdev, 4);
393 fcnt = inl(iobase + 0x90); /* Not PCI readable for some chips */
394 if ((fcnt >> 12) != 0xABCDE) {
395 printk(KERN_WARNING "hpt3xn: BIOS clock data not set.\n");
396 return 33; /* Not BIOS set */
400 freq = (fcnt * 77) / 192;
413 * hpt3x2n_init_one - Initialise an HPT37X/302
415 * @id: Entry in match table
417 * Initialise an HPT3x2n device. There are some interesting complications
418 * here. Firstly the chip may report 366 and be one of several variants.
419 * Secondly all the timings depend on the clock for the chip which we must
422 * This is the known chip mappings. It may be missing a couple of later
425 * Chip version PCI Rev Notes
426 * HPT372 4 (HPT366) 5 Other driver
427 * HPT372N 4 (HPT366) 6 UDMA133
428 * HPT372 5 (HPT372) 1 Other driver
429 * HPT372N 5 (HPT372) 2 UDMA133
430 * HPT302 6 (HPT302) * Other driver
431 * HPT302N 6 (HPT302) > 1 UDMA133
432 * HPT371 7 (HPT371) * Other driver
433 * HPT371N 7 (HPT371) > 1 UDMA133
434 * HPT374 8 (HPT374) * Other driver
435 * HPT372N 9 (HPT372N) * UDMA133
437 * (1) UDMA133 support depends on the bus clock
439 * To pin down HPT371N
442 static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
444 /* HPT372N and friends - UDMA133 */
445 static const struct ata_port_info info = {
446 .flags = ATA_FLAG_SLAVE_POSS,
447 .pio_mask = ATA_PIO4,
448 .mwdma_mask = ATA_MWDMA2,
449 .udma_mask = ATA_UDMA6,
450 .port_ops = &hpt3x2n_port_ops
452 const struct ata_port_info *ppi[] = { &info, NULL };
457 unsigned int pci_mhz;
458 unsigned int f_low, f_high;
460 unsigned long iobase = pci_resource_start(dev, 4);
464 rc = pcim_enable_device(dev);
468 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
471 switch(dev->device) {
472 case PCI_DEVICE_ID_TTI_HPT366:
476 case PCI_DEVICE_ID_TTI_HPT371:
479 /* 371N if rev > 1 */
481 case PCI_DEVICE_ID_TTI_HPT372:
482 /* 372N if rev >= 2*/
486 case PCI_DEVICE_ID_TTI_HPT302:
490 case PCI_DEVICE_ID_TTI_HPT372N:
493 printk(KERN_ERR "pata_hpt3x2n: PCI table is bogus please report (%d).\n", dev->device);
497 /* Ok so this is a chip we support */
499 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
500 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
501 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
502 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
504 pci_read_config_byte(dev, 0x5A, &irqmask);
506 pci_write_config_byte(dev, 0x5a, irqmask);
509 * HPT371 chips physically have only one channel, the secondary one,
510 * but the primary channel registers do exist! Go figure...
511 * So, we manually disable the non-existing channel here
512 * (if the BIOS hasn't done this already).
514 if (dev->device == PCI_DEVICE_ID_TTI_HPT371) {
516 pci_read_config_byte(dev, 0x50, &mcr1);
518 pci_write_config_byte(dev, 0x50, mcr1);
521 /* Tune the PLL. HPT recommend using 75 for SATA, 66 for UDMA133 or
522 50 for UDMA100. Right now we always use 66 */
524 pci_mhz = hpt3x2n_pci_clock(dev);
526 f_low = (pci_mhz * 48) / 66; /* PCI Mhz for 66Mhz DPLL */
527 f_high = f_low + 2; /* Tolerance */
529 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
531 pci_write_config_byte(dev, 0x5B, 0x21);
533 /* Unlike the 37x we don't try jiggling the frequency */
534 for(adjust = 0; adjust < 8; adjust++) {
535 if (hpt3xn_calibrate_dpll(dev))
537 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
540 printk(KERN_ERR "pata_hpt3x2n: DPLL did not stabilize!\n");
544 printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using 66MHz DPLL.\n",
546 /* Set our private data up. We only need a few flags so we use
549 hpriv = (void *)PCI66;
551 * On HPT371N, if ATA clock is 66 MHz we must set bit 2 in
552 * the MISC. register to stretch the UltraDMA Tss timing.
553 * NOTE: This register is only writeable via I/O space.
555 if (dev->device == PCI_DEVICE_ID_TTI_HPT371)
556 outb(inb(iobase + 0x9c) | 0x04, iobase + 0x9c);
559 /* Now kick off ATA set up */
560 return ata_pci_sff_init_one(dev, ppi, &hpt3x2n_sht, hpriv);
563 static const struct pci_device_id hpt3x2n[] = {
564 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
565 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
566 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
567 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
568 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372N), },
573 static struct pci_driver hpt3x2n_pci_driver = {
576 .probe = hpt3x2n_init_one,
577 .remove = ata_pci_remove_one
580 static int __init hpt3x2n_init(void)
582 return pci_register_driver(&hpt3x2n_pci_driver);
585 static void __exit hpt3x2n_exit(void)
587 pci_unregister_driver(&hpt3x2n_pci_driver);
590 MODULE_AUTHOR("Alan Cox");
591 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT3x2n/30x");
592 MODULE_LICENSE("GPL");
593 MODULE_DEVICE_TABLE(pci, hpt3x2n);
594 MODULE_VERSION(DRV_VERSION);
596 module_init(hpt3x2n_init);
597 module_exit(hpt3x2n_exit);