sl811_cs.c revision 440eed43e2a95bb842488755683716814da10f2b 
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/init.h>
16#include <linux/ptrace.h>
17#include <linux/slab.h>
18#include <linux/string.h>
19#include <linux/timer.h>
20#include <linux/ioport.h>
21#include <linux/platform_device.h>
22
23#include <pcmcia/cistpl.h>
24#include <pcmcia/cisreg.h>
25#include <pcmcia/ds.h>
26
27#include <linux/usb/sl811.h>
28
29MODULE_AUTHOR("Botond Botyanszki");
30MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
31MODULE_LICENSE("GPL");
32
33
34/*====================================================================*/
35/* MACROS                                                             */
36/*====================================================================*/
37
38#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
39
40/*====================================================================*/
41/* VARIABLES                                                          */
42/*====================================================================*/
43
44typedef struct local_info_t {
45	struct pcmcia_device	*p_dev;
46} local_info_t;
47
48static void sl811_cs_release(struct pcmcia_device * link);
49
50/*====================================================================*/
51
52static void release_platform_dev(struct device * dev)
53{
54	dev_dbg(dev, "sl811_cs platform_dev release\n");
55	dev->parent = NULL;
56}
57
58static struct sl811_platform_data platform_data = {
59	.potpg		= 100,
60	.power		= 50,		/* == 100mA */
61	// .reset	= ... FIXME:  invoke CF reset on the card
62};
63
64static struct resource resources[] = {
65	[0] = {
66		.flags	= IORESOURCE_IRQ,
67	},
68	[1] = {
69		// .name   = "address",
70		.flags	= IORESOURCE_IO,
71	},
72	[2] = {
73		// .name   = "data",
74		.flags	= IORESOURCE_IO,
75	},
76};
77
78extern struct platform_driver sl811h_driver;
79
80static struct platform_device platform_dev = {
81	.id			= -1,
82	.dev = {
83		.platform_data = &platform_data,
84		.release       = release_platform_dev,
85	},
86	.resource		= resources,
87	.num_resources		= ARRAY_SIZE(resources),
88};
89
90static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
91			 int irq)
92{
93	if (platform_dev.dev.parent)
94		return -EBUSY;
95	platform_dev.dev.parent = parent;
96
97	/* finish seting up the platform device */
98	resources[0].start = irq;
99
100	resources[1].start = base_addr;
101	resources[1].end = base_addr;
102
103	resources[2].start = base_addr + 1;
104	resources[2].end   = base_addr + 1;
105
106	/* The driver core will probe for us.  We know sl811-hcd has been
107	 * initialized already because of the link order dependency created
108	 * by referencing "sl811h_driver".
109	 */
110	platform_dev.name = sl811h_driver.driver.name;
111	return platform_device_register(&platform_dev);
112}
113
114/*====================================================================*/
115
116static void sl811_cs_detach(struct pcmcia_device *link)
117{
118	dev_dbg(&link->dev, "sl811_cs_detach\n");
119
120	sl811_cs_release(link);
121
122	/* This points to the parent local_info_t struct */
123	kfree(link->priv);
124}
125
126static void sl811_cs_release(struct pcmcia_device * link)
127{
128	dev_dbg(&link->dev, "sl811_cs_release\n");
129
130	pcmcia_disable_device(link);
131	platform_device_unregister(&platform_dev);
132}
133
134static int sl811_cs_config_check(struct pcmcia_device *p_dev,
135				 cistpl_cftable_entry_t *cfg,
136				 cistpl_cftable_entry_t *dflt,
137				 void *priv_data)
138{
139	if (cfg->index == 0)
140		return -ENODEV;
141
142	/* IO window settings */
143	p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
144	if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
145		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
146		p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
147
148		p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
149		p_dev->resource[0]->start = io->win[0].base;
150		p_dev->resource[0]->end = io->win[0].len;
151
152		return pcmcia_request_io(p_dev);
153	}
154	pcmcia_disable_device(p_dev);
155	return -ENODEV;
156}
157
158
159static int sl811_cs_config(struct pcmcia_device *link)
160{
161	struct device		*parent = &link->dev;
162	int			ret;
163
164	dev_dbg(&link->dev, "sl811_cs_config\n");
165
166	link->config_flags |= CONF_ENABLE_IRQ |	CONF_AUTO_SET_VPP |
167		CONF_AUTO_CHECK_VCC;
168
169	if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
170		goto failed;
171
172	/* require an IRQ and two registers */
173	if (resource_size(link->resource[0]) < 2)
174		goto failed;
175
176	if (!link->irq)
177		goto failed;
178
179	ret = pcmcia_enable_device(link);
180	if (ret)
181		goto failed;
182
183	dev_info(&link->dev, "index 0x%02x: ",
184		link->config_index);
185	if (link->vpp)
186		printk(", Vpp %d.%d", link->vpp/10, link->vpp%10);
187	printk(", irq %d", link->irq);
188	printk(", io %pR", link->resource[0]);
189	printk("\n");
190
191	if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
192			< 0) {
193failed:
194		printk(KERN_WARNING "sl811_cs_config failed\n");
195		sl811_cs_release(link);
196		return  -ENODEV;
197	}
198	return 0;
199}
200
201static int sl811_cs_probe(struct pcmcia_device *link)
202{
203	local_info_t *local;
204
205	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
206	if (!local)
207		return -ENOMEM;
208	local->p_dev = link;
209	link->priv = local;
210
211	return sl811_cs_config(link);
212}
213
214static struct pcmcia_device_id sl811_ids[] = {
215	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
216	PCMCIA_DEVICE_NULL,
217};
218MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
219
220static struct pcmcia_driver sl811_cs_driver = {
221	.owner		= THIS_MODULE,
222	.drv		= {
223		.name	= "sl811_cs",
224	},
225	.probe		= sl811_cs_probe,
226	.remove		= sl811_cs_detach,
227	.id_table	= sl811_ids,
228};
229
230/*====================================================================*/
231
232static int __init init_sl811_cs(void)
233{
234	return pcmcia_register_driver(&sl811_cs_driver);
235}
236module_init(init_sl811_cs);
237
238static void __exit exit_sl811_cs(void)
239{
240	pcmcia_unregister_driver(&sl811_cs_driver);
241}
242module_exit(exit_sl811_cs);
243