sl811_cs.c revision e8405f0f617856de0ceb7d04e65b663051451544 
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/cs.h>
24#include <pcmcia/cistpl.h>
25#include <pcmcia/cisreg.h>
26#include <pcmcia/ds.h>
27
28#include <linux/usb/sl811.h>
29
30MODULE_AUTHOR("Botond Botyanszki");
31MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
32MODULE_LICENSE("GPL");
33
34
35/*====================================================================*/
36/* MACROS                                                             */
37/*====================================================================*/
38
39#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
40
41/*====================================================================*/
42/* VARIABLES                                                          */
43/*====================================================================*/
44
45typedef struct local_info_t {
46	struct pcmcia_device	*p_dev;
47} local_info_t;
48
49static void sl811_cs_release(struct pcmcia_device * link);
50
51/*====================================================================*/
52
53static void release_platform_dev(struct device * dev)
54{
55	dev_dbg(dev, "sl811_cs platform_dev release\n");
56	dev->parent = NULL;
57}
58
59static struct sl811_platform_data platform_data = {
60	.potpg		= 100,
61	.power		= 50,		/* == 100mA */
62	// .reset	= ... FIXME:  invoke CF reset on the card
63};
64
65static struct resource resources[] = {
66	[0] = {
67		.flags	= IORESOURCE_IRQ,
68	},
69	[1] = {
70		// .name   = "address",
71		.flags	= IORESOURCE_IO,
72	},
73	[2] = {
74		// .name   = "data",
75		.flags	= IORESOURCE_IO,
76	},
77};
78
79extern struct platform_driver sl811h_driver;
80
81static struct platform_device platform_dev = {
82	.id			= -1,
83	.dev = {
84		.platform_data = &platform_data,
85		.release       = release_platform_dev,
86	},
87	.resource		= resources,
88	.num_resources		= ARRAY_SIZE(resources),
89};
90
91static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
92			 int irq)
93{
94	if (platform_dev.dev.parent)
95		return -EBUSY;
96	platform_dev.dev.parent = parent;
97
98	/* finish seting up the platform device */
99	resources[0].start = irq;
100
101	resources[1].start = base_addr;
102	resources[1].end = base_addr;
103
104	resources[2].start = base_addr + 1;
105	resources[2].end   = base_addr + 1;
106
107	/* The driver core will probe for us.  We know sl811-hcd has been
108	 * initialized already because of the link order dependency created
109	 * by referencing "sl811h_driver".
110	 */
111	platform_dev.name = sl811h_driver.driver.name;
112	return platform_device_register(&platform_dev);
113}
114
115/*====================================================================*/
116
117static void sl811_cs_detach(struct pcmcia_device *link)
118{
119	dev_dbg(&link->dev, "sl811_cs_detach\n");
120
121	sl811_cs_release(link);
122
123	/* This points to the parent local_info_t struct */
124	kfree(link->priv);
125}
126
127static void sl811_cs_release(struct pcmcia_device * link)
128{
129	dev_dbg(&link->dev, "sl811_cs_release\n");
130
131	pcmcia_disable_device(link);
132	platform_device_unregister(&platform_dev);
133}
134
135static int sl811_cs_config_check(struct pcmcia_device *p_dev,
136				 cistpl_cftable_entry_t *cfg,
137				 cistpl_cftable_entry_t *dflt,
138				 unsigned int vcc,
139				 void *priv_data)
140{
141	if (cfg->index == 0)
142		return -ENODEV;
143
144	/* Use power settings for Vcc and Vpp if present */
145	/*  Note that the CIS values need to be rescaled */
146	if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
147		if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
148			return -ENODEV;
149	} else if (dflt->vcc.present & (1<<CISTPL_POWER_VNOM)) {
150		if (dflt->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
151			return -ENODEV;
152		}
153
154	if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
155		p_dev->vpp =
156			cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
157	else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
158		p_dev->vpp =
159			dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
160
161	/* we need an interrupt */
162	p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
163
164	/* IO window settings */
165	p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
166	if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
167		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
168		p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
169
170		p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
171		p_dev->resource[0]->start = io->win[0].base;
172		p_dev->resource[0]->end = io->win[0].len;
173
174		return pcmcia_request_io(p_dev);
175	}
176	pcmcia_disable_device(p_dev);
177	return -ENODEV;
178}
179
180
181static int sl811_cs_config(struct pcmcia_device *link)
182{
183	struct device		*parent = &link->dev;
184	int			ret;
185
186	dev_dbg(&link->dev, "sl811_cs_config\n");
187
188	if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
189		goto failed;
190
191	/* require an IRQ and two registers */
192	if (resource_size(link->resource[0]) < 2)
193		goto failed;
194
195	if (!link->irq)
196		goto failed;
197
198	ret = pcmcia_request_configuration(link, &link->conf);
199	if (ret)
200		goto failed;
201
202	dev_info(&link->dev, "index 0x%02x: ",
203		link->conf.ConfigIndex);
204	if (link->vpp)
205		printk(", Vpp %d.%d", link->vpp/10, link->vpp%10);
206	printk(", irq %d", link->irq);
207	printk(", io %pR", link->resource[0]);
208	printk("\n");
209
210	if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
211			< 0) {
212failed:
213		printk(KERN_WARNING "sl811_cs_config failed\n");
214		sl811_cs_release(link);
215		return  -ENODEV;
216	}
217	return 0;
218}
219
220static int sl811_cs_probe(struct pcmcia_device *link)
221{
222	local_info_t *local;
223
224	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
225	if (!local)
226		return -ENOMEM;
227	local->p_dev = link;
228	link->priv = local;
229
230	link->conf.Attributes = 0;
231	link->conf.IntType = INT_MEMORY_AND_IO;
232
233	return sl811_cs_config(link);
234}
235
236static struct pcmcia_device_id sl811_ids[] = {
237	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
238	PCMCIA_DEVICE_NULL,
239};
240MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
241
242static struct pcmcia_driver sl811_cs_driver = {
243	.owner		= THIS_MODULE,
244	.drv		= {
245		.name	= "sl811_cs",
246	},
247	.probe		= sl811_cs_probe,
248	.remove		= sl811_cs_detach,
249	.id_table	= sl811_ids,
250};
251
252/*====================================================================*/
253
254static int __init init_sl811_cs(void)
255{
256	return pcmcia_register_driver(&sl811_cs_driver);
257}
258module_init(init_sl811_cs);
259
260static void __exit exit_sl811_cs(void)
261{
262	pcmcia_unregister_driver(&sl811_cs_driver);
263}
264module_exit(exit_sl811_cs);
265