blob: 765f136d8cd333fbcec4e0674ae6a4889b9a60b9 [file] [log] [blame]
Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
Sergei Shtylyov0ca646d2010-12-28 21:46:40 +03002 * Libata driver for the HighPoint 371N, 372N, and 302N UDMA66 ATA controllers.
Jeff Garzik669a5db2006-08-29 18:12:40 -04003 *
4 * This driver is heavily based upon:
5 *
6 * linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
7 *
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
Sergei Shtylyov8e834c22010-12-25 22:44:01 +030011 * Portions Copyright (C) 2005-2010 MontaVista Software, Inc.
Jeff Garzik669a5db2006-08-29 18:12:40 -040012 *
13 *
14 * TODO
Jeff Garzik669a5db2006-08-29 18:12:40 -040015 * Work out best PLL policy
16 */
17
Joe Perches8d7b1c72011-01-31 08:39:24 -080018#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
Jeff Garzik669a5db2006-08-29 18:12:40 -040020#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/pci.h>
23#include <linux/init.h>
24#include <linux/blkdev.h>
25#include <linux/delay.h>
26#include <scsi/scsi_host.h>
27#include <linux/libata.h>
28
29#define DRV_NAME "pata_hpt3x2n"
Joe Perches8d7b1c72011-01-31 08:39:24 -080030#define DRV_VERSION "0.3.15"
Jeff Garzik669a5db2006-08-29 18:12:40 -040031
32enum {
33 HPT_PCI_FAST = (1 << 31),
34 PCI66 = (1 << 1),
35 USE_DPLL = (1 << 0)
36};
37
38struct hpt_clock {
39 u8 xfer_speed;
40 u32 timing;
41};
42
43struct hpt_chip {
44 const char *name;
45 struct hpt_clock *clocks[3];
46};
47
48/* key for bus clock timings
49 * bit
Sergei Shtylyovfd5e62e2009-12-07 23:38:11 +040050 * 0:3 data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
51 * cycles = value + 1
52 * 4:8 data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
53 * cycles = value + 1
54 * 9:12 cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
Jeff Garzik669a5db2006-08-29 18:12:40 -040055 * register access.
Sergei Shtylyovfd5e62e2009-12-07 23:38:11 +040056 * 13:17 cmd_low_time. Active time of DIOW_/DIOR_ during task file
Jeff Garzik669a5db2006-08-29 18:12:40 -040057 * register access.
Sergei Shtylyovfd5e62e2009-12-07 23:38:11 +040058 * 18:20 udma_cycle_time. Clock cycles for UDMA xfer.
59 * 21 CLK frequency for UDMA: 0=ATA clock, 1=dual ATA clock.
60 * 22:24 pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer.
61 * 25:27 cmd_pre_high_time. Time to initialize 1st PIO cycle for task file
Jeff Garzik669a5db2006-08-29 18:12:40 -040062 * register access.
Sergei Shtylyovfd5e62e2009-12-07 23:38:11 +040063 * 28 UDMA enable.
64 * 29 DMA enable.
65 * 30 PIO_MST enable. If set, the chip is in bus master mode during
66 * PIO xfer.
67 * 31 FIFO enable. Only for PIO.
Jeff Garzik669a5db2006-08-29 18:12:40 -040068 */
Jeff Garzik85cd7252006-08-31 00:03:49 -040069
Jeff Garzik669a5db2006-08-29 18:12:40 -040070/* 66MHz DPLL clocks */
71
72static struct hpt_clock hpt3x2n_clocks[] = {
73 { XFER_UDMA_7, 0x1c869c62 },
74 { XFER_UDMA_6, 0x1c869c62 },
75 { XFER_UDMA_5, 0x1c8a9c62 },
76 { XFER_UDMA_4, 0x1c8a9c62 },
77 { XFER_UDMA_3, 0x1c8e9c62 },
78 { XFER_UDMA_2, 0x1c929c62 },
79 { XFER_UDMA_1, 0x1c9a9c62 },
80 { XFER_UDMA_0, 0x1c829c62 },
81
82 { XFER_MW_DMA_2, 0x2c829c62 },
83 { XFER_MW_DMA_1, 0x2c829c66 },
Bartlomiej Zolnierkiewiczd413ff32009-12-03 20:32:09 +010084 { XFER_MW_DMA_0, 0x2c829d2e },
Jeff Garzik669a5db2006-08-29 18:12:40 -040085
86 { XFER_PIO_4, 0x0c829c62 },
87 { XFER_PIO_3, 0x0c829c84 },
88 { XFER_PIO_2, 0x0c829ca6 },
89 { XFER_PIO_1, 0x0d029d26 },
90 { XFER_PIO_0, 0x0d029d5e },
Jeff Garzik669a5db2006-08-29 18:12:40 -040091};
92
93/**
94 * hpt3x2n_find_mode - reset the hpt3x2n bus
95 * @ap: ATA port
96 * @speed: transfer mode
97 *
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
101 * different DPLLs
102 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400103
Jeff Garzik669a5db2006-08-29 18:12:40 -0400104static u32 hpt3x2n_find_mode(struct ata_port *ap, int speed)
105{
106 struct hpt_clock *clocks = hpt3x2n_clocks;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400107
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300108 while (clocks->xfer_speed) {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400109 if (clocks->xfer_speed == speed)
110 return clocks->timing;
111 clocks++;
112 }
113 BUG();
114 return 0xffffffffU; /* silence compiler warning */
115}
116
117/**
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300118 * hpt372n_filter - mode selection filter
119 * @adev: ATA device
120 * @mask: mode mask
121 *
122 * The Marvell bridge chips used on the HighPoint SATA cards do not seem
123 * to support the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes...
124 */
125static unsigned long hpt372n_filter(struct ata_device *adev, unsigned long mask)
126{
127 if (ata_id_is_sata(adev->id))
128 mask &= ~((0xE << ATA_SHIFT_UDMA) | ATA_MASK_MWDMA);
129
130 return mask;
131}
132
133/**
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500134 * hpt3x2n_cable_detect - Detect the cable type
135 * @ap: ATA port to detect on
Jeff Garzik669a5db2006-08-29 18:12:40 -0400136 *
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500137 * Return the cable type attached to this port
Jeff Garzik669a5db2006-08-29 18:12:40 -0400138 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400139
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500140static int hpt3x2n_cable_detect(struct ata_port *ap)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400141{
142 u8 scr2, ata66;
143 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400144
Jeff Garzik669a5db2006-08-29 18:12:40 -0400145 pci_read_config_byte(pdev, 0x5B, &scr2);
146 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
Bartlomiej Zolnierkiewicz10a9c962009-11-19 20:31:31 +0100147
148 udelay(10); /* debounce */
149
Jeff Garzik669a5db2006-08-29 18:12:40 -0400150 /* Cable register now active */
151 pci_read_config_byte(pdev, 0x5A, &ata66);
152 /* Restore state */
153 pci_write_config_byte(pdev, 0x5B, scr2);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400154
Bartlomiej Zolnierkiewiczf3b1cf42009-11-19 18:38:11 +0100155 if (ata66 & (2 >> ap->port_no))
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500156 return ATA_CBL_PATA40;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400157 else
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500158 return ATA_CBL_PATA80;
159}
Jeff Garzik669a5db2006-08-29 18:12:40 -0400160
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500161/**
162 * hpt3x2n_pre_reset - reset the hpt3x2n bus
Tejun Heocc0680a2007-08-06 18:36:23 +0900163 * @link: ATA link to reset
Alan Cox28e21c82007-04-26 00:19:25 -0700164 * @deadline: deadline jiffies for the operation
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500165 *
166 * Perform the initial reset handling for the 3x2n series controllers.
167 * Reset the hardware and state machine,
168 */
169
Tejun Heoa1efdab2008-03-25 12:22:50 +0900170static int hpt3x2n_pre_reset(struct ata_link *link, unsigned long deadline)
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500171{
Tejun Heocc0680a2007-08-06 18:36:23 +0900172 struct ata_port *ap = link->ap;
Jeff Garzika0fcdc02007-03-09 07:24:15 -0500173 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300174
Jeff Garzik669a5db2006-08-29 18:12:40 -0400175 /* Reset the state machine */
Alan Cox28e21c82007-04-26 00:19:25 -0700176 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400177 udelay(100);
Tejun Heod4b2bab2007-02-02 16:50:52 +0900178
Tejun Heo9363c382008-04-07 22:47:16 +0900179 return ata_sff_prereset(link, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400180}
Jeff Garzik85cd7252006-08-31 00:03:49 -0400181
Sergei Shtylyov1a1b1722009-12-07 23:30:06 +0400182static void hpt3x2n_set_mode(struct ata_port *ap, struct ata_device *adev,
183 u8 mode)
184{
185 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
186 u32 addr1, addr2;
187 u32 reg, timing, mask;
188 u8 fast;
189
190 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
191 addr2 = 0x51 + 4 * ap->port_no;
192
193 /* Fast interrupt prediction disable, hold off interrupt disable */
194 pci_read_config_byte(pdev, addr2, &fast);
195 fast &= ~0x07;
196 pci_write_config_byte(pdev, addr2, fast);
197
198 /* Determine timing mask and find matching mode entry */
199 if (mode < XFER_MW_DMA_0)
200 mask = 0xcfc3ffff;
201 else if (mode < XFER_UDMA_0)
202 mask = 0x31c001ff;
203 else
204 mask = 0x303c0000;
205
206 timing = hpt3x2n_find_mode(ap, mode);
207
208 pci_read_config_dword(pdev, addr1, &reg);
209 reg = (reg & ~mask) | (timing & mask);
210 pci_write_config_dword(pdev, addr1, reg);
211}
212
Jeff Garzik669a5db2006-08-29 18:12:40 -0400213/**
Jeff Garzik669a5db2006-08-29 18:12:40 -0400214 * hpt3x2n_set_piomode - PIO setup
215 * @ap: ATA interface
216 * @adev: device on the interface
217 *
Jeff Garzik85cd7252006-08-31 00:03:49 -0400218 * Perform PIO mode setup.
Jeff Garzik669a5db2006-08-29 18:12:40 -0400219 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400220
Jeff Garzik669a5db2006-08-29 18:12:40 -0400221static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
222{
Sergei Shtylyov1a1b1722009-12-07 23:30:06 +0400223 hpt3x2n_set_mode(ap, adev, adev->pio_mode);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400224}
225
226/**
227 * hpt3x2n_set_dmamode - DMA timing setup
228 * @ap: ATA interface
229 * @adev: Device being configured
230 *
Sergei Shtylyov1a1b1722009-12-07 23:30:06 +0400231 * Set up the channel for MWDMA or UDMA modes.
Jeff Garzik669a5db2006-08-29 18:12:40 -0400232 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400233
Jeff Garzik669a5db2006-08-29 18:12:40 -0400234static void hpt3x2n_set_dmamode(struct ata_port *ap, struct ata_device *adev)
235{
Sergei Shtylyov1a1b1722009-12-07 23:30:06 +0400236 hpt3x2n_set_mode(ap, adev, adev->dma_mode);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400237}
238
239/**
240 * hpt3x2n_bmdma_end - DMA engine stop
241 * @qc: ATA command
242 *
243 * Clean up after the HPT3x2n and later DMA engine
244 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400245
Jeff Garzik669a5db2006-08-29 18:12:40 -0400246static void hpt3x2n_bmdma_stop(struct ata_queued_cmd *qc)
247{
248 struct ata_port *ap = qc->ap;
249 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
250 int mscreg = 0x50 + 2 * ap->port_no;
251 u8 bwsr_stat, msc_stat;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400252
Jeff Garzik669a5db2006-08-29 18:12:40 -0400253 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
254 pci_read_config_byte(pdev, mscreg, &msc_stat);
255 if (bwsr_stat & (1 << ap->port_no))
256 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
257 ata_bmdma_stop(qc);
258}
259
260/**
261 * hpt3x2n_set_clock - clock control
262 * @ap: ATA port
263 * @source: 0x21 or 0x23 for PLL or PCI sourced clock
264 *
265 * Switch the ATA bus clock between the PLL and PCI clock sources
266 * while correctly isolating the bus and resetting internal logic
267 *
268 * We must use the DPLL for
269 * - writing
270 * - second channel UDMA7 (SATA ports) or higher
271 * - 66MHz PCI
Jeff Garzik85cd7252006-08-31 00:03:49 -0400272 *
Jeff Garzik669a5db2006-08-29 18:12:40 -0400273 * or we will underclock the device and get reduced performance.
274 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400275
Jeff Garzik669a5db2006-08-29 18:12:40 -0400276static void hpt3x2n_set_clock(struct ata_port *ap, int source)
277{
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500278 void __iomem *bmdma = ap->ioaddr.bmdma_addr - ap->port_no * 8;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400279
Jeff Garzik669a5db2006-08-29 18:12:40 -0400280 /* Tristate the bus */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900281 iowrite8(0x80, bmdma+0x73);
282 iowrite8(0x80, bmdma+0x77);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400283
Jeff Garzik669a5db2006-08-29 18:12:40 -0400284 /* Switch clock and reset channels */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900285 iowrite8(source, bmdma+0x7B);
286 iowrite8(0xC0, bmdma+0x79);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400287
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500288 /* Reset state machines, avoid enabling the disabled channels */
289 iowrite8(ioread8(bmdma+0x70) | 0x32, bmdma+0x70);
290 iowrite8(ioread8(bmdma+0x74) | 0x32, bmdma+0x74);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400291
Jeff Garzik669a5db2006-08-29 18:12:40 -0400292 /* Complete reset */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900293 iowrite8(0x00, bmdma+0x79);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400294
Jeff Garzik669a5db2006-08-29 18:12:40 -0400295 /* Reconnect channels to bus */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900296 iowrite8(0x00, bmdma+0x73);
297 iowrite8(0x00, bmdma+0x77);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400298}
299
Alana52865c2007-01-24 11:51:38 +0000300static int hpt3x2n_use_dpll(struct ata_port *ap, int writing)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400301{
302 long flags = (long)ap->host->private_data;
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500303
Jeff Garzik669a5db2006-08-29 18:12:40 -0400304 /* See if we should use the DPLL */
Alana52865c2007-01-24 11:51:38 +0000305 if (writing)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400306 return USE_DPLL; /* Needed for write */
307 if (flags & PCI66)
308 return USE_DPLL; /* Needed at 66Mhz */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400309 return 0;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400310}
311
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500312static int hpt3x2n_qc_defer(struct ata_queued_cmd *qc)
313{
314 struct ata_port *ap = qc->ap;
315 struct ata_port *alt = ap->host->ports[ap->port_no ^ 1];
316 int rc, flags = (long)ap->host->private_data;
317 int dpll = hpt3x2n_use_dpll(ap, qc->tf.flags & ATA_TFLAG_WRITE);
318
319 /* First apply the usual rules */
320 rc = ata_std_qc_defer(qc);
321 if (rc != 0)
322 return rc;
323
324 if ((flags & USE_DPLL) != dpll && alt->qc_active)
325 return ATA_DEFER_PORT;
326 return 0;
327}
328
Tejun Heo9363c382008-04-07 22:47:16 +0900329static unsigned int hpt3x2n_qc_issue(struct ata_queued_cmd *qc)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400330{
Jeff Garzik669a5db2006-08-29 18:12:40 -0400331 struct ata_port *ap = qc->ap;
332 int flags = (long)ap->host->private_data;
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500333 int dpll = hpt3x2n_use_dpll(ap, qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400334
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500335 if ((flags & USE_DPLL) != dpll) {
336 flags &= ~USE_DPLL;
337 flags |= dpll;
338 ap->host->private_data = (void *)(long)flags;
339
340 hpt3x2n_set_clock(ap, dpll ? 0x21 : 0x23);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400341 }
Tejun Heo360ff782010-05-10 21:41:42 +0200342 return ata_bmdma_qc_issue(qc);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400343}
344
345static struct scsi_host_template hpt3x2n_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900346 ATA_BMDMA_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400347};
348
349/*
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300350 * Configuration for HPT302N/371N.
Jeff Garzik669a5db2006-08-29 18:12:40 -0400351 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400352
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300353static struct ata_port_operations hpt3xxn_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900354 .inherits = &ata_bmdma_port_ops,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400355
Jeff Garzik669a5db2006-08-29 18:12:40 -0400356 .bmdma_stop = hpt3x2n_bmdma_stop,
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500357
358 .qc_defer = hpt3x2n_qc_defer,
Tejun Heo9363c382008-04-07 22:47:16 +0900359 .qc_issue = hpt3x2n_qc_issue,
Jeff Garzikbda30282006-09-27 05:41:13 -0400360
Tejun Heo029cfd62008-03-25 12:22:49 +0900361 .cable_detect = hpt3x2n_cable_detect,
362 .set_piomode = hpt3x2n_set_piomode,
363 .set_dmamode = hpt3x2n_set_dmamode,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900364 .prereset = hpt3x2n_pre_reset,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400365};
Jeff Garzik669a5db2006-08-29 18:12:40 -0400366
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300367/*
368 * Configuration for HPT372N. Same as 302N/371N but we have a mode filter.
369 */
370
371static struct ata_port_operations hpt372n_port_ops = {
372 .inherits = &hpt3xxn_port_ops,
373 .mode_filter = &hpt372n_filter,
374};
375
Jeff Garzik669a5db2006-08-29 18:12:40 -0400376/**
377 * hpt3xn_calibrate_dpll - Calibrate the DPLL loop
Jeff Garzik85cd7252006-08-31 00:03:49 -0400378 * @dev: PCI device
Jeff Garzik669a5db2006-08-29 18:12:40 -0400379 *
380 * Perform a calibration cycle on the HPT3xN DPLL. Returns 1 if this
381 * succeeds
382 */
383
384static int hpt3xn_calibrate_dpll(struct pci_dev *dev)
385{
386 u8 reg5b;
387 u32 reg5c;
388 int tries;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400389
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300390 for (tries = 0; tries < 0x5000; tries++) {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400391 udelay(50);
392 pci_read_config_byte(dev, 0x5b, &reg5b);
393 if (reg5b & 0x80) {
394 /* See if it stays set */
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300395 for (tries = 0; tries < 0x1000; tries++) {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400396 pci_read_config_byte(dev, 0x5b, &reg5b);
397 /* Failed ? */
398 if ((reg5b & 0x80) == 0)
399 return 0;
400 }
401 /* Turn off tuning, we have the DPLL set */
402 pci_read_config_dword(dev, 0x5c, &reg5c);
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300403 pci_write_config_dword(dev, 0x5c, reg5c & ~0x100);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400404 return 1;
405 }
406 }
407 /* Never went stable */
408 return 0;
409}
410
411static int hpt3x2n_pci_clock(struct pci_dev *pdev)
412{
413 unsigned long freq;
414 u32 fcnt;
Alan Cox28e21c82007-04-26 00:19:25 -0700415 unsigned long iobase = pci_resource_start(pdev, 4);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400416
Alan Cox28e21c82007-04-26 00:19:25 -0700417 fcnt = inl(iobase + 0x90); /* Not PCI readable for some chips */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400418 if ((fcnt >> 12) != 0xABCDE) {
Sergei Shtylyovdfc7e3e2010-12-28 22:54:54 +0300419 int i;
420 u16 sr;
421 u32 total = 0;
422
Joe Perches8d7b1c72011-01-31 08:39:24 -0800423 pr_warn("BIOS clock data not set\n");
Sergei Shtylyovdfc7e3e2010-12-28 22:54:54 +0300424
425 /* This is the process the HPT371 BIOS is reported to use */
426 for (i = 0; i < 128; i++) {
427 pci_read_config_word(pdev, 0x78, &sr);
428 total += sr & 0x1FF;
429 udelay(15);
430 }
431 fcnt = total / 128;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400432 }
433 fcnt &= 0x1FF;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400434
Jeff Garzik669a5db2006-08-29 18:12:40 -0400435 freq = (fcnt * 77) / 192;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400436
Jeff Garzik669a5db2006-08-29 18:12:40 -0400437 /* Clamp to bands */
438 if (freq < 40)
439 return 33;
440 if (freq < 45)
441 return 40;
442 if (freq < 55)
443 return 50;
444 return 66;
445}
446
447/**
448 * hpt3x2n_init_one - Initialise an HPT37X/302
449 * @dev: PCI device
450 * @id: Entry in match table
451 *
452 * Initialise an HPT3x2n device. There are some interesting complications
453 * here. Firstly the chip may report 366 and be one of several variants.
454 * Secondly all the timings depend on the clock for the chip which we must
455 * detect and look up
456 *
457 * This is the known chip mappings. It may be missing a couple of later
458 * releases.
459 *
460 * Chip version PCI Rev Notes
461 * HPT372 4 (HPT366) 5 Other driver
462 * HPT372N 4 (HPT366) 6 UDMA133
463 * HPT372 5 (HPT372) 1 Other driver
464 * HPT372N 5 (HPT372) 2 UDMA133
465 * HPT302 6 (HPT302) * Other driver
466 * HPT302N 6 (HPT302) > 1 UDMA133
467 * HPT371 7 (HPT371) * Other driver
468 * HPT371N 7 (HPT371) > 1 UDMA133
469 * HPT374 8 (HPT374) * Other driver
470 * HPT372N 9 (HPT372N) * UDMA133
471 *
472 * (1) UDMA133 support depends on the bus clock
Jeff Garzik669a5db2006-08-29 18:12:40 -0400473 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400474
Jeff Garzik669a5db2006-08-29 18:12:40 -0400475static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
476{
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300477 /* HPT372N - UDMA133 */
478 static const struct ata_port_info info_hpt372n = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400479 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100480 .pio_mask = ATA_PIO4,
481 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400482 .udma_mask = ATA_UDMA6,
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300483 .port_ops = &hpt372n_port_ops
Jeff Garzik669a5db2006-08-29 18:12:40 -0400484 };
Sergei Shtylyov8e834c22010-12-25 22:44:01 +0300485 /* HPT302N and HPT371N - UDMA133 */
486 static const struct ata_port_info info_hpt3xxn = {
487 .flags = ATA_FLAG_SLAVE_POSS,
488 .pio_mask = ATA_PIO4,
489 .mwdma_mask = ATA_MWDMA2,
490 .udma_mask = ATA_UDMA6,
491 .port_ops = &hpt3xxn_port_ops
492 };
493 const struct ata_port_info *ppi[] = { &info_hpt3xxn, NULL };
Sergei Shtylyov89d3b362009-11-24 22:54:49 +0400494 u8 rev = dev->revision;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400495 u8 irqmask;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400496 unsigned int pci_mhz;
497 unsigned int f_low, f_high;
498 int adjust;
Alan Cox28e21c82007-04-26 00:19:25 -0700499 unsigned long iobase = pci_resource_start(dev, 4);
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500500 void *hpriv = (void *)USE_DPLL;
Tejun Heof08048e2008-03-25 12:22:47 +0900501 int rc;
502
503 rc = pcim_enable_device(dev);
504 if (rc)
505 return rc;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400506
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300507 switch (dev->device) {
508 case PCI_DEVICE_ID_TTI_HPT366:
509 /* 372N if rev >= 6 */
510 if (rev < 6)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400511 return -ENODEV;
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300512 goto hpt372n;
513 case PCI_DEVICE_ID_TTI_HPT371:
514 /* 371N if rev >= 2 */
515 if (rev < 2)
516 return -ENODEV;
517 break;
518 case PCI_DEVICE_ID_TTI_HPT372:
519 /* 372N if rev >= 2 */
520 if (rev < 2)
521 return -ENODEV;
522 goto hpt372n;
523 case PCI_DEVICE_ID_TTI_HPT302:
524 /* 302N if rev >= 2 */
525 if (rev < 2)
526 return -ENODEV;
527 break;
528 case PCI_DEVICE_ID_TTI_HPT372N:
529hpt372n:
530 ppi[0] = &info_hpt372n;
531 break;
532 default:
Joe Perches8d7b1c72011-01-31 08:39:24 -0800533 pr_err("PCI table is bogus, please report (%d)\n", dev->device);
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300534 return -ENODEV;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400535 }
536
537 /* Ok so this is a chip we support */
538
539 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
540 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
541 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
542 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
543
544 pci_read_config_byte(dev, 0x5A, &irqmask);
545 irqmask &= ~0x10;
546 pci_write_config_byte(dev, 0x5a, irqmask);
547
Alan Cox28e21c82007-04-26 00:19:25 -0700548 /*
549 * HPT371 chips physically have only one channel, the secondary one,
550 * but the primary channel registers do exist! Go figure...
551 * So, we manually disable the non-existing channel here
552 * (if the BIOS hasn't done this already).
553 */
554 if (dev->device == PCI_DEVICE_ID_TTI_HPT371) {
555 u8 mcr1;
556 pci_read_config_byte(dev, 0x50, &mcr1);
557 mcr1 &= ~0x04;
558 pci_write_config_byte(dev, 0x50, mcr1);
559 }
560
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300561 /*
562 * Tune the PLL. HPT recommend using 75 for SATA, 66 for UDMA133 or
563 * 50 for UDMA100. Right now we always use 66
564 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400565
Jeff Garzik669a5db2006-08-29 18:12:40 -0400566 pci_mhz = hpt3x2n_pci_clock(dev);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400567
Jeff Garzik669a5db2006-08-29 18:12:40 -0400568 f_low = (pci_mhz * 48) / 66; /* PCI Mhz for 66Mhz DPLL */
569 f_high = f_low + 2; /* Tolerance */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400570
Jeff Garzik669a5db2006-08-29 18:12:40 -0400571 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
572 /* PLL clock */
573 pci_write_config_byte(dev, 0x5B, 0x21);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400574
Jeff Garzik669a5db2006-08-29 18:12:40 -0400575 /* Unlike the 37x we don't try jiggling the frequency */
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300576 for (adjust = 0; adjust < 8; adjust++) {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400577 if (hpt3xn_calibrate_dpll(dev))
578 break;
579 pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
580 }
Alan Cox28e21c82007-04-26 00:19:25 -0700581 if (adjust == 8) {
Joe Perches8d7b1c72011-01-31 08:39:24 -0800582 pr_err("DPLL did not stabilize!\n");
Alan Cox28e21c82007-04-26 00:19:25 -0700583 return -ENODEV;
584 }
Jeff Garzik669a5db2006-08-29 18:12:40 -0400585
Joe Perches8d7b1c72011-01-31 08:39:24 -0800586 pr_info("bus clock %dMHz, using 66MHz DPLL\n", pci_mhz);
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300587
588 /*
589 * Set our private data up. We only need a few flags
590 * so we use it directly.
591 */
Sergei Shtylyov60661932009-12-07 23:25:52 +0400592 if (pci_mhz > 60)
Sergei Shtylyov256ace92009-12-17 01:11:27 -0500593 hpriv = (void *)(PCI66 | USE_DPLL);
Sergei Shtylyov60661932009-12-07 23:25:52 +0400594
595 /*
596 * On HPT371N, if ATA clock is 66 MHz we must set bit 2 in
597 * the MISC. register to stretch the UltraDMA Tss timing.
598 * NOTE: This register is only writeable via I/O space.
599 */
600 if (dev->device == PCI_DEVICE_ID_TTI_HPT371)
601 outb(inb(iobase + 0x9c) | 0x04, iobase + 0x9c);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400602
Jeff Garzik669a5db2006-08-29 18:12:40 -0400603 /* Now kick off ATA set up */
Tejun Heo1c5afdf2010-05-19 22:10:22 +0200604 return ata_pci_bmdma_init_one(dev, ppi, &hpt3x2n_sht, hpriv, 0);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400605}
606
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400607static const struct pci_device_id hpt3x2n[] = {
608 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
Alan Cox28e21c82007-04-26 00:19:25 -0700609 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400610 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
611 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
612 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372N), },
613
614 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400615};
616
617static struct pci_driver hpt3x2n_pci_driver = {
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300618 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400619 .id_table = hpt3x2n,
Sergei Shtylyovb197f132010-12-28 23:11:36 +0300620 .probe = hpt3x2n_init_one,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400621 .remove = ata_pci_remove_one
622};
623
624static int __init hpt3x2n_init(void)
625{
626 return pci_register_driver(&hpt3x2n_pci_driver);
627}
628
Jeff Garzik669a5db2006-08-29 18:12:40 -0400629static void __exit hpt3x2n_exit(void)
630{
631 pci_unregister_driver(&hpt3x2n_pci_driver);
632}
633
Jeff Garzik669a5db2006-08-29 18:12:40 -0400634MODULE_AUTHOR("Alan Cox");
Sergei Shtylyov0ca646d2010-12-28 21:46:40 +0300635MODULE_DESCRIPTION("low-level driver for the Highpoint HPT3xxN");
Jeff Garzik669a5db2006-08-29 18:12:40 -0400636MODULE_LICENSE("GPL");
637MODULE_DEVICE_TABLE(pci, hpt3x2n);
638MODULE_VERSION(DRV_VERSION);
639
640module_init(hpt3x2n_init);
641module_exit(hpt3x2n_exit);