1 // SPDX-License-Identifier: GPL-2.0-only
3 * Libata driver for the highpoint 366 and 368 UDMA66 ATA controllers.
5 * This driver is heavily based upon:
7 * linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
9 * Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
10 * Portions Copyright (C) 2001 Sun Microsystems, Inc.
11 * Portions Copyright (C) 2003 Red Hat Inc
15 * Look into engine reset on timeout errors. Should not be required.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/blkdev.h>
21 #include <linux/delay.h>
22 #include <scsi/scsi_host.h>
23 #include <linux/libata.h>
25 #define DRV_NAME "pata_hpt366"
26 #define DRV_VERSION "0.6.13"
33 /* key for bus clock timings
35 * 0:3 data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
37 * 4:7 data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
39 * 8:11 cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
41 * 12:15 cmd_low_time. Active time of DIOW_/DIOR_ during task file
43 * 16:18 udma_cycle_time. Clock cycles for UDMA xfer?
44 * 19:21 pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer.
45 * 22:24 cmd_pre_high_time. Time to initialize 1st PIO cycle for task file
49 * 30 PIO_MST enable. If set, the chip is in bus master mode during
54 static const struct hpt_clock hpt366_40[] = {
55 { XFER_UDMA_4, 0x900fd943 },
56 { XFER_UDMA_3, 0x900ad943 },
57 { XFER_UDMA_2, 0x900bd943 },
58 { XFER_UDMA_1, 0x9008d943 },
59 { XFER_UDMA_0, 0x9008d943 },
61 { XFER_MW_DMA_2, 0xa008d943 },
62 { XFER_MW_DMA_1, 0xa010d955 },
63 { XFER_MW_DMA_0, 0xa010d9fc },
65 { XFER_PIO_4, 0xc008d963 },
66 { XFER_PIO_3, 0xc010d974 },
67 { XFER_PIO_2, 0xc010d997 },
68 { XFER_PIO_1, 0xc010d9c7 },
69 { XFER_PIO_0, 0xc018d9d9 },
73 static const struct hpt_clock hpt366_33[] = {
74 { XFER_UDMA_4, 0x90c9a731 },
75 { XFER_UDMA_3, 0x90cfa731 },
76 { XFER_UDMA_2, 0x90caa731 },
77 { XFER_UDMA_1, 0x90cba731 },
78 { XFER_UDMA_0, 0x90c8a731 },
80 { XFER_MW_DMA_2, 0xa0c8a731 },
81 { XFER_MW_DMA_1, 0xa0c8a732 }, /* 0xa0c8a733 */
82 { XFER_MW_DMA_0, 0xa0c8a797 },
84 { XFER_PIO_4, 0xc0c8a731 },
85 { XFER_PIO_3, 0xc0c8a742 },
86 { XFER_PIO_2, 0xc0d0a753 },
87 { XFER_PIO_1, 0xc0d0a7a3 }, /* 0xc0d0a793 */
88 { XFER_PIO_0, 0xc0d0a7aa }, /* 0xc0d0a7a7 */
92 static const struct hpt_clock hpt366_25[] = {
93 { XFER_UDMA_4, 0x90c98521 },
94 { XFER_UDMA_3, 0x90cf8521 },
95 { XFER_UDMA_2, 0x90cf8521 },
96 { XFER_UDMA_1, 0x90cb8521 },
97 { XFER_UDMA_0, 0x90cb8521 },
99 { XFER_MW_DMA_2, 0xa0ca8521 },
100 { XFER_MW_DMA_1, 0xa0ca8532 },
101 { XFER_MW_DMA_0, 0xa0ca8575 },
103 { XFER_PIO_4, 0xc0ca8521 },
104 { XFER_PIO_3, 0xc0ca8532 },
105 { XFER_PIO_2, 0xc0ca8542 },
106 { XFER_PIO_1, 0xc0d08572 },
107 { XFER_PIO_0, 0xc0d08585 },
112 * hpt36x_find_mode - find the hpt36x timing
114 * @speed: transfer mode
116 * Return the 32bit register programming information for this channel
117 * that matches the speed provided.
120 static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
122 struct hpt_clock *clocks = ap->host->private_data;
124 while (clocks->xfer_mode) {
125 if (clocks->xfer_mode == speed)
126 return clocks->timing;
130 return 0xffffffffU; /* silence compiler warning */
133 static const char * const bad_ata33[] = {
134 "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3",
135 "Maxtor 90845U3", "Maxtor 90650U2",
136 "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5",
137 "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
138 "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6",
139 "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
141 "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
142 "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7",
143 "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
144 "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5",
145 "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
149 static const char * const bad_ata66_4[] = {
168 static const char * const bad_ata66_3[] = {
173 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
174 const char * const list[])
176 unsigned char model_num[ATA_ID_PROD_LEN + 1];
179 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
181 i = match_string(list, -1, model_num);
183 ata_dev_warn(dev, "%s is not supported for %s\n", modestr, list[i]);
190 * hpt366_filter - mode selection filter
192 * @mask: Current mask to manipulate and pass back
194 * Block UDMA on devices that cause trouble with this controller.
197 static unsigned int hpt366_filter(struct ata_device *adev, unsigned int mask)
199 if (adev->class == ATA_DEV_ATA) {
200 if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33))
201 mask &= ~ATA_MASK_UDMA;
202 if (hpt_dma_blacklisted(adev, "UDMA3", bad_ata66_3))
203 mask &= ~(0xF8 << ATA_SHIFT_UDMA);
204 if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
205 mask &= ~(0xF0 << ATA_SHIFT_UDMA);
206 } else if (adev->class == ATA_DEV_ATAPI)
207 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
212 static int hpt36x_cable_detect(struct ata_port *ap)
214 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
218 * Each channel of pata_hpt366 occupies separate PCI function
219 * as the primary channel and bit1 indicates the cable type.
221 pci_read_config_byte(pdev, 0x5A, &ata66);
223 return ATA_CBL_PATA40;
224 return ATA_CBL_PATA80;
227 static void hpt366_set_mode(struct ata_port *ap, struct ata_device *adev,
230 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
231 u32 addr = 0x40 + 4 * adev->devno;
234 /* determine timing mask and find matching clock entry */
235 if (mode < XFER_MW_DMA_0)
237 else if (mode < XFER_UDMA_0)
242 t = hpt36x_find_mode(ap, mode);
245 * Combine new mode bits with old config bits and disable
246 * on-chip PIO FIFO/buffer (and PIO MST mode as well) to avoid
247 * problems handling I/O errors later.
249 pci_read_config_dword(pdev, addr, ®);
250 reg = ((reg & ~mask) | (t & mask)) & ~0xc0000000;
251 pci_write_config_dword(pdev, addr, reg);
255 * hpt366_set_piomode - PIO setup
257 * @adev: device on the interface
259 * Perform PIO mode setup.
262 static void hpt366_set_piomode(struct ata_port *ap, struct ata_device *adev)
264 hpt366_set_mode(ap, adev, adev->pio_mode);
268 * hpt366_set_dmamode - DMA timing setup
270 * @adev: Device being configured
272 * Set up the channel for MWDMA or UDMA modes. Much the same as with
273 * PIO, load the mode number and then set MWDMA or UDMA flag.
276 static void hpt366_set_dmamode(struct ata_port *ap, struct ata_device *adev)
278 hpt366_set_mode(ap, adev, adev->dma_mode);
282 * hpt366_prereset - reset the hpt36x bus
283 * @link: ATA link to reset
284 * @deadline: deadline jiffies for the operation
286 * Perform the initial reset handling for the 36x series controllers.
287 * Reset the hardware and state machine,
290 static int hpt366_prereset(struct ata_link *link, unsigned long deadline)
292 struct ata_port *ap = link->ap;
293 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
295 * HPT36x chips have one channel per function and have
296 * both channel enable bits located differently and visible
297 * to both functions -- really stupid design decision... :-(
298 * Bit 4 is for the primary channel, bit 5 for the secondary.
300 static const struct pci_bits hpt366_enable_bits = {
305 if (!pci_test_config_bits(pdev, &hpt366_enable_bits))
308 pci_read_config_byte(pdev, 0x51, &mcr2);
310 pci_write_config_byte(pdev, 0x51, mcr2 & ~0x80);
312 return ata_sff_prereset(link, deadline);
315 static const struct scsi_host_template hpt36x_sht = {
316 ATA_BMDMA_SHT(DRV_NAME),
320 * Configuration for HPT366/68
323 static struct ata_port_operations hpt366_port_ops = {
324 .inherits = &ata_bmdma_port_ops,
325 .prereset = hpt366_prereset,
326 .cable_detect = hpt36x_cable_detect,
327 .mode_filter = hpt366_filter,
328 .set_piomode = hpt366_set_piomode,
329 .set_dmamode = hpt366_set_dmamode,
333 * hpt36x_init_chipset - common chip setup
336 * Perform the chip setup work that must be done at both init and
340 static void hpt36x_init_chipset(struct pci_dev *dev)
344 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
345 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
346 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
347 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
350 * Now we'll have to force both channels enabled if at least one
351 * of them has been enabled by BIOS...
353 pci_read_config_byte(dev, 0x50, &mcr1);
355 pci_write_config_byte(dev, 0x50, mcr1 | 0x30);
359 * hpt36x_init_one - Initialise an HPT366/368
361 * @id: Entry in match table
363 * Initialise an HPT36x device. There are some interesting complications
364 * here. Firstly the chip may report 366 and be one of several variants.
365 * Secondly all the timings depend on the clock for the chip which we must
368 * This is the known chip mappings. It may be missing a couple of later
371 * Chip version PCI Rev Notes
372 * HPT366 4 (HPT366) 0 UDMA66
373 * HPT366 4 (HPT366) 1 UDMA66
374 * HPT368 4 (HPT366) 2 UDMA66
375 * HPT37x/30x 4 (HPT366) 3+ Other driver
379 static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
381 static const struct ata_port_info info_hpt366 = {
382 .flags = ATA_FLAG_SLAVE_POSS,
383 .pio_mask = ATA_PIO4,
384 .mwdma_mask = ATA_MWDMA2,
385 .udma_mask = ATA_UDMA4,
386 .port_ops = &hpt366_port_ops
388 const struct ata_port_info *ppi[] = { &info_hpt366, NULL };
390 const void *hpriv = NULL;
394 rc = pcim_enable_device(dev);
398 /* May be a later chip in disguise. Check */
399 /* Newer chips are not in the HPT36x driver. Ignore them */
400 if (dev->revision > 2)
403 hpt36x_init_chipset(dev);
405 pci_read_config_dword(dev, 0x40, ®1);
407 /* PCI clocking determines the ATA timing values to use */
408 /* info_hpt366 is safe against re-entry so we can scribble on it */
409 switch ((reg1 & 0xf00) >> 8) {
420 /* Now kick off ATA set up */
421 return ata_pci_bmdma_init_one(dev, ppi, &hpt36x_sht, (void *)hpriv, 0);
424 #ifdef CONFIG_PM_SLEEP
425 static int hpt36x_reinit_one(struct pci_dev *dev)
427 struct ata_host *host = pci_get_drvdata(dev);
430 rc = ata_pci_device_do_resume(dev);
433 hpt36x_init_chipset(dev);
434 ata_host_resume(host);
439 static const struct pci_device_id hpt36x[] = {
440 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
444 static struct pci_driver hpt36x_pci_driver = {
447 .probe = hpt36x_init_one,
448 .remove = ata_pci_remove_one,
449 #ifdef CONFIG_PM_SLEEP
450 .suspend = ata_pci_device_suspend,
451 .resume = hpt36x_reinit_one,
455 module_pci_driver(hpt36x_pci_driver);
457 MODULE_AUTHOR("Alan Cox");
458 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
459 MODULE_LICENSE("GPL");
460 MODULE_DEVICE_TABLE(pci, hpt36x);
461 MODULE_VERSION(DRV_VERSION);