delkin_cb.c revision 9f36d31437922354d104a2db407f397e79e4027e 
1/*
2 *  Created 20 Oct 2004 by Mark Lord
3 *
4 *  Basic support for Delkin/ASKA/Workbit Cardbus CompactFlash adapter
5 *
6 *  Modeled after the 16-bit PCMCIA driver: ide-cs.c
7 *
8 *  This is slightly peculiar, in that it is a PCI driver,
9 *  but is NOT an IDE PCI driver -- the IDE layer does not directly
10 *  support hot insertion/removal of PCI interfaces, so this driver
11 *  is unable to use the IDE PCI interfaces.  Instead, it uses the
12 *  same interfaces as the ide-cs (PCMCIA) driver uses.
13 *  On the plus side, the driver is also smaller/simpler this way.
14 *
15 *  This file is subject to the terms and conditions of the GNU General Public
16 *  License.  See the file COPYING in the main directory of this archive for
17 *  more details.
18 */
19
20#include <linux/types.h>
21#include <linux/module.h>
22#include <linux/ide.h>
23#include <linux/init.h>
24#include <linux/pci.h>
25
26#include <asm/io.h>
27
28/*
29 * No chip documentation has yet been found,
30 * so these configuration values were pulled from
31 * a running Win98 system using "debug".
32 * This gives around 3MByte/second read performance,
33 * which is about 2/3 of what the chip is capable of.
34 *
35 * There is also a 4KByte mmio region on the card,
36 * but its purpose has yet to be reverse-engineered.
37 */
38static const u8 setup[] = {
39	0x00, 0x05, 0xbe, 0x01, 0x20, 0x8f, 0x00, 0x00,
40	0xa4, 0x1f, 0xb3, 0x1b, 0x00, 0x00, 0x00, 0x80,
41	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
42	0x00, 0x00, 0x00, 0x00, 0xa4, 0x83, 0x02, 0x13,
43};
44
45static const struct ide_port_ops delkin_cb_port_ops = {
46	.quirkproc		= ide_undecoded_slave,
47};
48
49static int delkin_cb_init_chipset(struct pci_dev *dev)
50{
51	unsigned long base = pci_resource_start(dev, 0);
52	int i;
53
54	outb(0x02, base + 0x1e);	/* set nIEN to block interrupts */
55	inb(base + 0x17);		/* read status to clear interrupts */
56
57	for (i = 0; i < sizeof(setup); ++i) {
58		if (setup[i])
59			outb(setup[i], base + i);
60	}
61
62	return 0;
63}
64
65static const struct ide_port_info delkin_cb_port_info = {
66	.port_ops		= &delkin_cb_port_ops,
67	.host_flags		= IDE_HFLAG_IO_32BIT | IDE_HFLAG_UNMASK_IRQS |
68				  IDE_HFLAG_NO_DMA,
69	.irq_flags		= IRQF_SHARED,
70	.init_chipset		= delkin_cb_init_chipset,
71	.chipset		= ide_pci,
72};
73
74static int __devinit
75delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
76{
77	struct ide_host *host;
78	unsigned long base;
79	int rc;
80	struct ide_hw hw, *hws[] = { &hw };
81
82	rc = pci_enable_device(dev);
83	if (rc) {
84		printk(KERN_ERR "delkin_cb: pci_enable_device failed (%d)\n", rc);
85		return rc;
86	}
87	rc = pci_request_regions(dev, "delkin_cb");
88	if (rc) {
89		printk(KERN_ERR "delkin_cb: pci_request_regions failed (%d)\n", rc);
90		pci_disable_device(dev);
91		return rc;
92	}
93	base = pci_resource_start(dev, 0);
94
95	delkin_cb_init_chipset(dev);
96
97	memset(&hw, 0, sizeof(hw));
98	ide_std_init_ports(&hw, base + 0x10, base + 0x1e);
99	hw.irq = dev->irq;
100	hw.dev = &dev->dev;
101
102	rc = ide_host_add(&delkin_cb_port_info, hws, 1, &host);
103	if (rc)
104		goto out_disable;
105
106	pci_set_drvdata(dev, host);
107
108	return 0;
109
110out_disable:
111	pci_release_regions(dev);
112	pci_disable_device(dev);
113	return rc;
114}
115
116static void
117delkin_cb_remove (struct pci_dev *dev)
118{
119	struct ide_host *host = pci_get_drvdata(dev);
120
121	ide_host_remove(host);
122
123	pci_release_regions(dev);
124	pci_disable_device(dev);
125}
126
127#ifdef CONFIG_PM
128static int delkin_cb_suspend(struct pci_dev *dev, pm_message_t state)
129{
130	pci_save_state(dev);
131	pci_disable_device(dev);
132	pci_set_power_state(dev, pci_choose_state(dev, state));
133
134	return 0;
135}
136
137static int delkin_cb_resume(struct pci_dev *dev)
138{
139	struct ide_host *host = pci_get_drvdata(dev);
140	int rc;
141
142	pci_set_power_state(dev, PCI_D0);
143
144	rc = pci_enable_device(dev);
145	if (rc)
146		return rc;
147
148	pci_restore_state(dev);
149	pci_set_master(dev);
150
151	if (host->init_chipset)
152		host->init_chipset(dev);
153
154	return 0;
155}
156#else
157#define delkin_cb_suspend NULL
158#define delkin_cb_resume NULL
159#endif
160
161static struct pci_device_id delkin_cb_pci_tbl[] __devinitdata = {
162	{ 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
163	{ 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
164	{ 0, },
165};
166MODULE_DEVICE_TABLE(pci, delkin_cb_pci_tbl);
167
168static struct pci_driver delkin_cb_pci_driver = {
169	.name		= "Delkin-ASKA-Workbit Cardbus IDE",
170	.id_table	= delkin_cb_pci_tbl,
171	.probe		= delkin_cb_probe,
172	.remove		= delkin_cb_remove,
173	.suspend	= delkin_cb_suspend,
174	.resume		= delkin_cb_resume,
175};
176
177static int __init delkin_cb_init(void)
178{
179	return pci_register_driver(&delkin_cb_pci_driver);
180}
181
182static void __exit delkin_cb_exit(void)
183{
184	pci_unregister_driver(&delkin_cb_pci_driver);
185}
186
187module_init(delkin_cb_init);
188module_exit(delkin_cb_exit);
189
190MODULE_AUTHOR("Mark Lord");
191MODULE_DESCRIPTION("Basic support for Delkin/ASKA/Workbit Cardbus IDE");
192MODULE_LICENSE("GPL");
193
194