blob: d003bec56ff9f51c7c5839e83e79e317b9608eac [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 Zolnierkiewicz8f4dd2e2007-10-11 23:54:02 +020060static void cs5520_set_pio_mode(ide_drive_t *drive, const u8 pio)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +010062 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +010063 struct pci_dev *pdev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 int controller = drive->dn > 1 ? 1 : 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 Zolnierkiewicz88b2b322007-10-13 17:47:51 +020084static void cs5520_set_dma_mode(ide_drive_t *drive, const u8 speed)
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
88 cs5520_set_pio_mode(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089}
90
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020091static const struct ide_port_ops cs5520_port_ops = {
92 .set_pio_mode = cs5520_set_pio_mode,
93 .set_dma_mode = cs5520_set_dma_mode,
94};
95
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +020096static const struct ide_port_info cyrix_chipset __devinitdata = {
97 .name = DRV_NAME,
Bartlomiej Zolnierkiewicz24307ff2008-08-05 18:17:03 +020098 .enablebits = { { 0x60, 0x01, 0x01 }, { 0x60, 0x02, 0x02 } },
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +020099 .port_ops = &cs5520_port_ops,
100 .host_flags = IDE_HFLAG_ISA_PORTS | IDE_HFLAG_CS5520,
101 .pio_mask = ATA_PIO4,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102};
103
104/*
105 * The 5510/5520 are a bit weird. They don't quite set up the way
106 * the PCI helper layer expects so we must do much of the set up
107 * work longhand.
108 */
109
110static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id)
111{
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200112 const struct ide_port_info *d = &cyrix_chipset;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200113 hw_regs_t hw[4], *hws[] = { NULL, NULL, NULL, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115 ide_setup_pci_noise(dev, d);
116
117 /* We must not grab the entire device, it has 'ISA' space in its
Benjamin Herrenschmidt09483912007-12-20 15:28:09 +1100118 * BARS too and we will freak out other bits of the kernel
Benjamin Herrenschmidt09483912007-12-20 15:28:09 +1100119 */
120 if (pci_enable_device_io(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name);
Amit Gud1e39dea2005-11-18 23:03:19 +0100122 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
124 pci_set_master(dev);
125 if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200126 printk(KERN_WARNING "%s: No suitable DMA available.\n",
127 d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 return -ENODEV;
129 }
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 /*
132 * Now the chipset is configured we can let the core
133 * do all the device setup for us
134 */
135
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +0200136 ide_pci_setup_ports(dev, d, 14, &hw[0], &hws[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +0200138 return ide_host_add(d, hws, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139}
140
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +0200141static const struct pci_device_id cs5520_pci_tbl[] = {
142 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), 0 },
143 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5520), 1 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 { 0, },
145};
146MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl);
147
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200148static struct pci_driver cs5520_pci_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 .name = "Cyrix_IDE",
150 .id_table = cs5520_pci_tbl,
151 .probe = cs5520_init_one,
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +0200152 .suspend = ide_pci_suspend,
153 .resume = ide_pci_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154};
155
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100156static int __init cs5520_ide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200158 return ide_pci_register_driver(&cs5520_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159}
160
161module_init(cs5520_ide_init);
162
163MODULE_AUTHOR("Alan Cox");
164MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE");
165MODULE_LICENSE("GPL");