1/*
2 * PCMCIA driver for SL811HS (as found in REX-CFU1U)
3 * Filename: sl811_cs.c
4 * Author:   Yukio Yamamoto
5 *
6 *  Port to sl811-hcd and 2.6.x by
7 *    Botond Botyanszki <boti@rocketmail.com>
8 *    Simon Pickering
9 *
10 *  Last update: 2005-05-12
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/ptrace.h>
16#include <linux/slab.h>
17#include <linux/string.h>
18#include <linux/timer.h>
19#include <linux/ioport.h>
20#include <linux/platform_device.h>
21
22#include <pcmcia/cistpl.h>
23#include <pcmcia/cisreg.h>
24#include <pcmcia/ds.h>
25
26#include <linux/usb/sl811.h>
27
28MODULE_AUTHOR("Botond Botyanszki");
29MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
30MODULE_LICENSE("GPL");
31
32
33/*====================================================================*/
34/* MACROS                                                             */
35/*====================================================================*/
36
37#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
38
39/*====================================================================*/
40/* VARIABLES                                                          */
41/*====================================================================*/
42
43typedef struct local_info_t {
44	struct pcmcia_device	*p_dev;
45} local_info_t;
46
47static void sl811_cs_release(struct pcmcia_device * link);
48
49/*====================================================================*/
50
51static void release_platform_dev(struct device * dev)
52{
53	dev_dbg(dev, "sl811_cs platform_dev release\n");
54	dev->parent = NULL;
55}
56
57static struct sl811_platform_data platform_data = {
58	.potpg		= 100,
59	.power		= 50,		/* == 100mA */
60	// .reset	= ... FIXME:  invoke CF reset on the card
61};
62
63static struct resource resources[] = {
64	[0] = {
65		.flags	= IORESOURCE_IRQ,
66	},
67	[1] = {
68		// .name   = "address",
69		.flags	= IORESOURCE_IO,
70	},
71	[2] = {
72		// .name   = "data",
73		.flags	= IORESOURCE_IO,
74	},
75};
76
77extern struct platform_driver sl811h_driver;
78
79static struct platform_device platform_dev = {
80	.id			= -1,
81	.dev = {
82		.platform_data = &platform_data,
83		.release       = release_platform_dev,
84	},
85	.resource		= resources,
86	.num_resources		= ARRAY_SIZE(resources),
87};
88
89static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
90			 int irq)
91{
92	if (platform_dev.dev.parent)
93		return -EBUSY;
94	platform_dev.dev.parent = parent;
95
96	/* finish seting up the platform device */
97	resources[0].start = irq;
98
99	resources[1].start = base_addr;
100	resources[1].end = base_addr;
101
102	resources[2].start = base_addr + 1;
103	resources[2].end   = base_addr + 1;
104
105	/* The driver core will probe for us.  We know sl811-hcd has been
106	 * initialized already because of the link order dependency created
107	 * by referencing "sl811h_driver".
108	 */
109	platform_dev.name = sl811h_driver.driver.name;
110	return platform_device_register(&platform_dev);
111}
112
113/*====================================================================*/
114
115static void sl811_cs_detach(struct pcmcia_device *link)
116{
117	dev_dbg(&link->dev, "sl811_cs_detach\n");
118
119	sl811_cs_release(link);
120
121	/* This points to the parent local_info_t struct */
122	kfree(link->priv);
123}
124
125static void sl811_cs_release(struct pcmcia_device * link)
126{
127	dev_dbg(&link->dev, "sl811_cs_release\n");
128
129	pcmcia_disable_device(link);
130	platform_device_unregister(&platform_dev);
131}
132
133static int sl811_cs_config_check(struct pcmcia_device *p_dev, void *priv_data)
134{
135	if (p_dev->config_index == 0)
136		return -EINVAL;
137
138	return pcmcia_request_io(p_dev);
139}
140
141
142static int sl811_cs_config(struct pcmcia_device *link)
143{
144	struct device		*parent = &link->dev;
145	int			ret;
146
147	dev_dbg(&link->dev, "sl811_cs_config\n");
148
149	link->config_flags |= CONF_ENABLE_IRQ |	CONF_AUTO_SET_VPP |
150		CONF_AUTO_CHECK_VCC | CONF_AUTO_SET_IO;
151
152	if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
153		goto failed;
154
155	/* require an IRQ and two registers */
156	if (resource_size(link->resource[0]) < 2)
157		goto failed;
158
159	if (!link->irq)
160		goto failed;
161
162	ret = pcmcia_enable_device(link);
163	if (ret)
164		goto failed;
165
166	if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
167			< 0) {
168failed:
169		printk(KERN_WARNING "sl811_cs_config failed\n");
170		sl811_cs_release(link);
171		return  -ENODEV;
172	}
173	return 0;
174}
175
176static int sl811_cs_probe(struct pcmcia_device *link)
177{
178	local_info_t *local;
179
180	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
181	if (!local)
182		return -ENOMEM;
183	local->p_dev = link;
184	link->priv = local;
185
186	return sl811_cs_config(link);
187}
188
189static const struct pcmcia_device_id sl811_ids[] = {
190	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
191	PCMCIA_DEVICE_NULL,
192};
193MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
194
195static struct pcmcia_driver sl811_cs_driver = {
196	.owner		= THIS_MODULE,
197	.name		= "sl811_cs",
198	.probe		= sl811_cs_probe,
199	.remove		= sl811_cs_detach,
200	.id_table	= sl811_ids,
201};
202module_pcmcia_driver(sl811_cs_driver);
203