blob: 2c1e5f7cd261f79e82f947ae0cf7baaa3fc0505e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * IDE tuning and bus mastering support for the CS5510/CS5520
3 * chipsets
4 *
5 * The CS5510/CS5520 are slightly unusual devices. Unlike the
6 * typical IDE controllers they do bus mastering with the drive in
7 * PIO mode and smarter silicon.
8 *
9 * The practical upshot of this is that we must always tune the
10 * drive for the right PIO mode. We must also ignore all the blacklists
11 * and the drive bus mastering DMA information.
12 *
13 * *** This driver is strictly experimental ***
14 *
15 * (c) Copyright Red Hat Inc 2002
16 *
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License as published by the
19 * Free Software Foundation; either version 2, or (at your option) any
20 * later version.
21 *
22 * This program is distributed in the hope that it will be useful, but
23 * WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * General Public License for more details.
26 *
27 * For the avoidance of doubt the "preferred form" of this code is one which
28 * is in an open non patent encumbered format. Where cryptographic key signing
29 * forms part of the process of creating an executable the information
30 * including keys needed to generate an equivalently functional executable
31 * are deemed to be part of the source code.
32 *
33 */
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/module.h>
36#include <linux/types.h>
37#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/init.h>
39#include <linux/pci.h>
40#include <linux/ide.h>
41#include <linux/dma-mapping.h>
42
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +020043#define DRV_NAME "cs5520"
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045struct pio_clocks
46{
47 int address;
48 int assert;
49 int recovery;
50};
51
52static struct pio_clocks cs5520_pio_clocks[]={
53 {3, 6, 11},
54 {2, 5, 6},
55 {1, 4, 3},
56 {1, 3, 2},
57 {1, 2, 1}
58};
59
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -080060static void cs5520_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +010062 struct pci_dev *pdev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 int controller = drive->dn > 1 ? 1 : 0;
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -080064 const u8 pio = drive->pio_mode - XFER_PIO_0;
Bartlomiej Zolnierkiewiczf212ff22007-10-11 23:53:59 +020065
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 /* 8bit CAT/CRT - 8bit command timing for channel */
67 pci_write_config_byte(pdev, 0x62 + controller,
68 (cs5520_pio_clocks[pio].recovery << 4) |
69 (cs5520_pio_clocks[pio].assert));
70
71 /* 0x64 - 16bit Primary, 0x68 - 16bit Secondary */
72
73 /* FIXME: should these use address ? */
74 /* Data read timing */
75 pci_write_config_byte(pdev, 0x64 + 4*controller + (drive->dn&1),
76 (cs5520_pio_clocks[pio].recovery << 4) |
77 (cs5520_pio_clocks[pio].assert));
78 /* Write command timing */
79 pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1),
80 (cs5520_pio_clocks[pio].recovery << 4) |
81 (cs5520_pio_clocks[pio].assert));
Bartlomiej Zolnierkiewicz326d72f2007-10-11 23:54:01 +020082}
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +020083
Bartlomiej Zolnierkiewicz87761682010-01-19 01:45:29 -080084static void cs5520_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Bartlomiej Zolnierkiewicz8f4dd2e2007-10-11 23:54:02 +020086 printk(KERN_ERR "cs55x0: bad ide timing.\n");
87
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -080088 drive->pio_mode = XFER_PIO_0 + 0;
Bartlomiej Zolnierkiewicz87761682010-01-19 01:45:29 -080089 cs5520_set_pio_mode(hwif, drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
91
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020092static const struct ide_port_ops cs5520_port_ops = {
93 .set_pio_mode = cs5520_set_pio_mode,
94 .set_dma_mode = cs5520_set_dma_mode,
95};
96
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +020097static const struct ide_port_info cyrix_chipset __devinitdata = {
98 .name = DRV_NAME,
Bartlomiej Zolnierkiewicz24307ff2008-08-05 18:17:03 +020099 .enablebits = { { 0x60, 0x01, 0x01 }, { 0x60, 0x02, 0x02 } },
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200100 .port_ops = &cs5520_port_ops,
101 .host_flags = IDE_HFLAG_ISA_PORTS | IDE_HFLAG_CS5520,
102 .pio_mask = ATA_PIO4,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103};
104
105/*
106 * The 5510/5520 are a bit weird. They don't quite set up the way
107 * the PCI helper layer expects so we must do much of the set up
108 * work longhand.
109 */
110
111static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id)
112{
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200113 const struct ide_port_info *d = &cyrix_chipset;
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +0200114 struct ide_hw hw[2], *hws[] = { NULL, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116 ide_setup_pci_noise(dev, d);
117
118 /* We must not grab the entire device, it has 'ISA' space in its
Benjamin Herrenschmidt09483912007-12-20 15:28:09 +1100119 * BARS too and we will freak out other bits of the kernel
Benjamin Herrenschmidt09483912007-12-20 15:28:09 +1100120 */
121 if (pci_enable_device_io(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name);
Amit Gud1e39dea2005-11-18 23:03:19 +0100123 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 }
125 pci_set_master(dev);
Yang Hongyang284901a2009-04-06 19:01:15 -0700126 if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200127 printk(KERN_WARNING "%s: No suitable DMA available.\n",
128 d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 return -ENODEV;
130 }
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 /*
133 * Now the chipset is configured we can let the core
134 * do all the device setup for us
135 */
136
Bartlomiej Zolnierkiewicz86ccf372009-03-24 23:22:53 +0100137 ide_pci_setup_ports(dev, d, &hw[0], &hws[0]);
138 hw[0].irq = 14;
David S. Millerd7e2f362009-06-24 02:36:17 -0700139 hw[1].irq = 15;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +0200141 return ide_host_add(d, hws, 2, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
143
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +0200144static const struct pci_device_id cs5520_pci_tbl[] = {
145 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), 0 },
146 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5520), 1 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 { 0, },
148};
149MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl);
150
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200151static struct pci_driver cs5520_pci_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 .name = "Cyrix_IDE",
153 .id_table = cs5520_pci_tbl,
154 .probe = cs5520_init_one,
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +0200155 .suspend = ide_pci_suspend,
156 .resume = ide_pci_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157};
158
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100159static int __init cs5520_ide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200161 return ide_pci_register_driver(&cs5520_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
163
164module_init(cs5520_ide_init);
165
166MODULE_AUTHOR("Alan Cox");
167MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE");
168MODULE_LICENSE("GPL");