blob: ce2f828c17b30f4ff5fa831c933d3174c6136d5d [file] [log] [blame]
Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
Alan Coxab771632008-10-27 15:09:10 +00002 * New ATA layer SC1200 driver Alan Cox <alan@lxorguk.ukuu.org.uk>
Jeff Garzik669a5db2006-08-29 18:12:40 -04003 *
4 * TODO: Mode selection filtering
Jeff Garzik669a5db2006-08-29 18:12:40 -04005 * TODO: Needs custom DMA cleanup code
6 *
7 * Based very heavily on
8 *
9 * linux/drivers/ide/pci/sc1200.c Version 0.91 28-Jan-2003
10 *
11 * Copyright (C) 2000-2002 Mark Lord <mlord@pobox.com>
12 * May be copied or modified under the terms of the GNU General Public License
13 *
14 * Development of this chipset driver was funded
15 * by the nice folks at National Semiconductor.
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Jeff Garzik85cd7252006-08-31 00:03:49 -040029 *
Jeff Garzik669a5db2006-08-29 18:12:40 -040030 */
31
32#include <linux/kernel.h>
33#include <linux/module.h>
34#include <linux/pci.h>
35#include <linux/init.h>
36#include <linux/blkdev.h>
37#include <linux/delay.h>
38#include <scsi/scsi_host.h>
39#include <linux/libata.h>
40
Bartlomiej Zolnierkiewicz70f301a2011-10-13 12:53:05 +020041#define DRV_NAME "pata_sc1200"
Jeff Garzik2a3103c2007-08-31 04:54:06 -040042#define DRV_VERSION "0.2.6"
Jeff Garzik669a5db2006-08-29 18:12:40 -040043
44#define SC1200_REV_A 0x00
45#define SC1200_REV_B1 0x01
46#define SC1200_REV_B3 0x02
47#define SC1200_REV_C1 0x03
48#define SC1200_REV_D1 0x04
49
50/**
51 * sc1200_clock - PCI clock
52 *
53 * Return the PCI bus clocking for the SC1200 chipset configuration
54 * in use. We return 0 for 33MHz 1 for 48MHz and 2 for 66Mhz
55 */
Jeff Garzik85cd7252006-08-31 00:03:49 -040056
Jeff Garzik669a5db2006-08-29 18:12:40 -040057static int sc1200_clock(void)
58{
59 /* Magic registers that give us the chipset data */
60 u8 chip_id = inb(0x903C);
61 u8 silicon_rev = inb(0x903D);
62 u16 pci_clock;
Jeff Garzik85cd7252006-08-31 00:03:49 -040063
Jeff Garzik669a5db2006-08-29 18:12:40 -040064 if (chip_id == 0x04 && silicon_rev < SC1200_REV_B1)
65 return 0; /* 33 MHz mode */
66
67 /* Clock generator configuration 0x901E its 8/9 are the PCI clocking
68 0/3 is 33Mhz 1 is 48 2 is 66 */
69
70 pci_clock = inw(0x901E);
71 pci_clock >>= 8;
72 pci_clock &= 0x03;
73 if (pci_clock == 3)
74 pci_clock = 0;
75 return pci_clock;
76}
77
78/**
79 * sc1200_set_piomode - PIO setup
80 * @ap: ATA interface
81 * @adev: device on the interface
82 *
83 * Set our PIO requirements. This is fairly simple on the SC1200
84 */
Jeff Garzik85cd7252006-08-31 00:03:49 -040085
Jeff Garzik669a5db2006-08-29 18:12:40 -040086static void sc1200_set_piomode(struct ata_port *ap, struct ata_device *adev)
87{
88 static const u32 pio_timings[4][5] = {
Bartlomiej Zolnierkiewiczd0dd4a012011-10-11 20:05:49 +020089 /* format0, 33Mhz */
90 { 0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010 },
91 /* format1, 33Mhz */
92 { 0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010 },
93 /* format1, 48Mhz */
94 { 0xfaa3f4f3, 0xc23232b2, 0x513101c1, 0x31213121, 0x10211021 },
95 /* format1, 66Mhz */
96 { 0xfff4fff4, 0xf35353d3, 0x814102f1, 0x42314231, 0x11311131 }
Jeff Garzik669a5db2006-08-29 18:12:40 -040097 };
98
99 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
100 u32 format;
101 unsigned int reg = 0x40 + 0x10 * ap->port_no;
102 int mode = adev->pio_mode - XFER_PIO_0;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400103
Jeff Garzik669a5db2006-08-29 18:12:40 -0400104 pci_read_config_dword(pdev, reg + 4, &format);
105 format >>= 31;
106 format += sc1200_clock();
Jeff Garzik85cd7252006-08-31 00:03:49 -0400107 pci_write_config_dword(pdev, reg + 8 * adev->devno,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400108 pio_timings[format][mode]);
109}
110
111/**
112 * sc1200_set_dmamode - DMA timing setup
113 * @ap: ATA interface
114 * @adev: Device being configured
115 *
116 * We cannot mix MWDMA and UDMA without reloading timings each switch
117 * master to slave.
118 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400119
Jeff Garzik669a5db2006-08-29 18:12:40 -0400120static void sc1200_set_dmamode(struct ata_port *ap, struct ata_device *adev)
121{
122 static const u32 udma_timing[3][3] = {
123 { 0x00921250, 0x00911140, 0x00911030 },
124 { 0x00932470, 0x00922260, 0x00922140 },
125 { 0x009436A1, 0x00933481, 0x00923261 }
126 };
Jeff Garzik85cd7252006-08-31 00:03:49 -0400127
Jeff Garzik669a5db2006-08-29 18:12:40 -0400128 static const u32 mwdma_timing[3][3] = {
129 { 0x00077771, 0x00012121, 0x00002020 },
130 { 0x000BBBB2, 0x00024241, 0x00013131 },
131 { 0x000FFFF3, 0x00035352, 0x00015151 }
132 };
Jeff Garzik85cd7252006-08-31 00:03:49 -0400133
Jeff Garzik669a5db2006-08-29 18:12:40 -0400134 int clock = sc1200_clock();
135 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
136 unsigned int reg = 0x40 + 0x10 * ap->port_no;
137 int mode = adev->dma_mode;
138 u32 format;
139
140 if (mode >= XFER_UDMA_0)
141 format = udma_timing[clock][mode - XFER_UDMA_0];
142 else
143 format = mwdma_timing[clock][mode - XFER_MW_DMA_0];
Jeff Garzik85cd7252006-08-31 00:03:49 -0400144
Jeff Garzik669a5db2006-08-29 18:12:40 -0400145 if (adev->devno == 0) {
146 u32 timings;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400147
Jeff Garzik669a5db2006-08-29 18:12:40 -0400148 pci_read_config_dword(pdev, reg + 4, &timings);
149 timings &= 0x80000000UL;
150 timings |= format;
151 pci_write_config_dword(pdev, reg + 4, timings);
152 } else
153 pci_write_config_dword(pdev, reg + 12, format);
154}
155
156/**
Tejun Heo9363c382008-04-07 22:47:16 +0900157 * sc1200_qc_issue - command issue
Jeff Garzik669a5db2006-08-29 18:12:40 -0400158 * @qc: command pending
159 *
160 * Called when the libata layer is about to issue a command. We wrap
161 * this interface so that we can load the correct ATA timings if
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200162 * necessary. Specifically we have a problem that there is only
Jeff Garzik669a5db2006-08-29 18:12:40 -0400163 * one MWDMA/UDMA bit.
164 */
165
Tejun Heo9363c382008-04-07 22:47:16 +0900166static unsigned int sc1200_qc_issue(struct ata_queued_cmd *qc)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400167{
168 struct ata_port *ap = qc->ap;
169 struct ata_device *adev = qc->dev;
170 struct ata_device *prev = ap->private_data;
171
172 /* See if the DMA settings could be wrong */
Alan Coxb15b3eb2008-08-01 09:18:34 +0100173 if (ata_dma_enabled(adev) && adev != prev && prev != NULL) {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400174 /* Maybe, but do the channels match MWDMA/UDMA ? */
Alan Coxb15b3eb2008-08-01 09:18:34 +0100175 if ((ata_using_udma(adev) && !ata_using_udma(prev)) ||
176 (ata_using_udma(prev) && !ata_using_udma(adev)))
Jeff Garzik669a5db2006-08-29 18:12:40 -0400177 /* Switch the mode bits */
178 sc1200_set_dmamode(ap, adev);
179 }
180
Tejun Heo360ff782010-05-10 21:41:42 +0200181 return ata_bmdma_qc_issue(qc);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400182}
183
Alan Coxc0f2ee32009-03-24 10:22:25 +0000184/**
185 * sc1200_qc_defer - implement serialization
186 * @qc: command
187 *
188 * Serialize command issue on this controller.
189 */
190
191static int sc1200_qc_defer(struct ata_queued_cmd *qc)
192{
193 struct ata_host *host = qc->ap->host;
194 struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];
195 int rc;
196
197 /* First apply the usual rules */
198 rc = ata_std_qc_defer(qc);
199 if (rc != 0)
200 return rc;
201
202 /* Now apply serialization rules. Only allow a command if the
203 other channel state machine is idle */
204 if (alt && alt->qc_active)
205 return ATA_DEFER_PORT;
206 return 0;
207}
208
Jeff Garzik669a5db2006-08-29 18:12:40 -0400209static struct scsi_host_template sc1200_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900210 ATA_BMDMA_SHT(DRV_NAME),
211 .sg_tablesize = LIBATA_DUMB_MAX_PRD,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400212};
213
214static struct ata_port_operations sc1200_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900215 .inherits = &ata_bmdma_port_ops,
Tejun Heof47451c2010-05-10 21:41:40 +0200216 .qc_prep = ata_bmdma_dumb_qc_prep,
Tejun Heo9363c382008-04-07 22:47:16 +0900217 .qc_issue = sc1200_qc_issue,
Alan Coxc0f2ee32009-03-24 10:22:25 +0000218 .qc_defer = sc1200_qc_defer,
Tejun Heo029cfd62008-03-25 12:22:49 +0900219 .cable_detect = ata_cable_40wire,
220 .set_piomode = sc1200_set_piomode,
221 .set_dmamode = sc1200_set_dmamode,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400222};
Jeff Garzik669a5db2006-08-29 18:12:40 -0400223
224/**
225 * sc1200_init_one - Initialise an SC1200
226 * @dev: PCI device
227 * @id: Entry in match table
228 *
229 * Just throw the needed data at the libata helper and it does all
230 * our work.
231 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400232
Jeff Garzik669a5db2006-08-29 18:12:40 -0400233static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id)
234{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200235 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400236 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100237 .pio_mask = ATA_PIO4,
238 .mwdma_mask = ATA_MWDMA2,
239 .udma_mask = ATA_UDMA2,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400240 .port_ops = &sc1200_port_ops
241 };
Alan Cox6d4f9502009-10-06 16:07:51 +0100242 const struct ata_port_info *ppi[] = { &info, NULL };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200243
Tejun Heo1c5afdf2010-05-19 22:10:22 +0200244 return ata_pci_bmdma_init_one(dev, ppi, &sc1200_sht, NULL, 0);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400245}
246
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400247static const struct pci_device_id sc1200[] = {
248 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_IDE), },
249
250 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400251};
252
253static struct pci_driver sc1200_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400254 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400255 .id_table = sc1200,
256 .probe = sc1200_init_one,
Alan30ced0f2006-11-22 16:57:36 +0000257 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900258#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000259 .suspend = ata_pci_device_suspend,
260 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900261#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400262};
263
Axel Lin2fc75da2012-04-19 13:43:05 +0800264module_pci_driver(sc1200_pci_driver);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400265
Jeff Garzik669a5db2006-08-29 18:12:40 -0400266MODULE_AUTHOR("Alan Cox, Mark Lord");
267MODULE_DESCRIPTION("low-level driver for the NS/AMD SC1200");
268MODULE_LICENSE("GPL");
269MODULE_DEVICE_TABLE(pci, sc1200);
270MODULE_VERSION(DRV_VERSION);