sl811_cs.c revision e2d4096365e06b9a3799afbadc28b4519c0b3526 
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/sched.h>
17#include <linux/ptrace.h>
18#include <linux/slab.h>
19#include <linux/string.h>
20#include <linux/timer.h>
21#include <linux/ioport.h>
22#include <linux/platform_device.h>
23
24#include <pcmcia/cs_types.h>
25#include <pcmcia/cs.h>
26#include <pcmcia/cistpl.h>
27#include <pcmcia/cisreg.h>
28#include <pcmcia/ds.h>
29
30#include <linux/usb_sl811.h>
31
32MODULE_AUTHOR("Botond Botyanszki");
33MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
34MODULE_LICENSE("GPL");
35
36
37/*====================================================================*/
38/* MACROS                                                             */
39/*====================================================================*/
40
41#if defined(DEBUG) || defined(PCMCIA_DEBUG)
42
43static int pc_debug = 0;
44module_param(pc_debug, int, 0644);
45
46#define DBG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG "sl811_cs: " args)
47
48#else
49#define DBG(n, args...) do{}while(0)
50#endif	/* no debugging */
51
52#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
53
54#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
55
56#define CS_CHECK(fn, ret) \
57	do { \
58		last_fn = (fn); \
59		if ((last_ret = (ret)) != 0) \
60			goto cs_failed; \
61	} while (0)
62
63/*====================================================================*/
64/* VARIABLES                                                          */
65/*====================================================================*/
66
67static const char driver_name[DEV_NAME_LEN]  = "sl811_cs";
68
69typedef struct local_info_t {
70	struct pcmcia_device	*p_dev;
71	dev_node_t		node;
72} local_info_t;
73
74static void sl811_cs_release(struct pcmcia_device * link);
75
76/*====================================================================*/
77
78static void release_platform_dev(struct device * dev)
79{
80	DBG(0, "sl811_cs platform_dev release\n");
81	dev->parent = NULL;
82}
83
84static struct sl811_platform_data platform_data = {
85	.potpg		= 100,
86	.power		= 50,		/* == 100mA */
87	// .reset	= ... FIXME:  invoke CF reset on the card
88};
89
90static struct resource resources[] = {
91	[0] = {
92		.flags	= IORESOURCE_IRQ,
93	},
94	[1] = {
95		// .name   = "address",
96		.flags	= IORESOURCE_IO,
97	},
98	[2] = {
99		// .name   = "data",
100		.flags	= IORESOURCE_IO,
101	},
102};
103
104extern struct platform_driver sl811h_driver;
105
106static struct platform_device platform_dev = {
107	.id			= -1,
108	.dev = {
109		.platform_data = &platform_data,
110		.release       = release_platform_dev,
111	},
112	.resource		= resources,
113	.num_resources		= ARRAY_SIZE(resources),
114};
115
116static int sl811_hc_init(struct device *parent, ioaddr_t base_addr, int irq)
117{
118	if (platform_dev.dev.parent)
119		return -EBUSY;
120	platform_dev.dev.parent = parent;
121
122	/* finish seting up the platform device */
123	resources[0].start = irq;
124
125	resources[1].start = base_addr;
126	resources[1].end = base_addr;
127
128	resources[2].start = base_addr + 1;
129	resources[2].end   = base_addr + 1;
130
131	/* The driver core will probe for us.  We know sl811-hcd has been
132	 * initialized already because of the link order dependency created
133	 * by referencing "sl811h_driver".
134	 */
135	platform_dev.name = sl811h_driver.driver.name;
136	return platform_device_register(&platform_dev);
137}
138
139/*====================================================================*/
140
141static void sl811_cs_detach(struct pcmcia_device *link)
142{
143	DBG(0, "sl811_cs_detach(0x%p)\n", link);
144
145	sl811_cs_release(link);
146
147	/* This points to the parent local_info_t struct */
148	kfree(link->priv);
149}
150
151static void sl811_cs_release(struct pcmcia_device * link)
152{
153	DBG(0, "sl811_cs_release(0x%p)\n", link);
154
155	pcmcia_disable_device(link);
156	platform_device_unregister(&platform_dev);
157}
158
159static int sl811_cs_config(struct pcmcia_device *link)
160{
161	struct device		*parent = &handle_to_dev(link);
162	local_info_t		*dev = link->priv;
163	tuple_t			tuple;
164	cisparse_t		parse;
165	int			last_fn, last_ret;
166	u_char			buf[64];
167	config_info_t		conf;
168	cistpl_cftable_entry_t	dflt = { 0 };
169
170	DBG(0, "sl811_cs_config(0x%p)\n", link);
171
172	tuple.DesiredTuple = CISTPL_CONFIG;
173	tuple.Attributes = 0;
174	tuple.TupleData = buf;
175	tuple.TupleDataMax = sizeof(buf);
176	tuple.TupleOffset = 0;
177	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
178	CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
179	CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
180	link->conf.ConfigBase = parse.config.base;
181	link->conf.Present = parse.config.rmask[0];
182
183	/* Look up the current Vcc */
184	CS_CHECK(GetConfigurationInfo,
185			pcmcia_get_configuration_info(link, &conf));
186
187	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
188	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
189	while (1) {
190		cistpl_cftable_entry_t	*cfg = &(parse.cftable_entry);
191
192		if (pcmcia_get_tuple_data(link, &tuple) != 0
193				|| pcmcia_parse_tuple(link, &tuple, &parse)
194						!= 0)
195			goto next_entry;
196
197		if (cfg->flags & CISTPL_CFTABLE_DEFAULT) {
198			dflt = *cfg;
199		}
200
201		if (cfg->index == 0)
202			goto next_entry;
203
204		link->conf.ConfigIndex = cfg->index;
205
206		/* Use power settings for Vcc and Vpp if present */
207		/*  Note that the CIS values need to be rescaled */
208		if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
209			if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000
210					!= conf.Vcc)
211				goto next_entry;
212		} else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
213			if (dflt.vcc.param[CISTPL_POWER_VNOM]/10000
214					!= conf.Vcc)
215				goto next_entry;
216		}
217
218		if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
219			link->conf.Vpp =
220				cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
221		else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
222			link->conf.Vpp =
223				dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
224
225		/* we need an interrupt */
226		if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
227			link->conf.Attributes |= CONF_ENABLE_IRQ;
228
229		/* IO window settings */
230		link->io.NumPorts1 = link->io.NumPorts2 = 0;
231		if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
232			cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
233
234			link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
235			link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
236			link->io.BasePort1 = io->win[0].base;
237			link->io.NumPorts1 = io->win[0].len;
238
239			if (pcmcia_request_io(link, &link->io) != 0)
240				goto next_entry;
241		}
242		break;
243
244next_entry:
245		pcmcia_disable_device(link);
246		last_ret = pcmcia_get_next_tuple(link, &tuple);
247	}
248
249	/* require an IRQ and two registers */
250	if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
251		goto cs_failed;
252	if (link->conf.Attributes & CONF_ENABLE_IRQ)
253		CS_CHECK(RequestIRQ,
254			pcmcia_request_irq(link, &link->irq));
255	else
256		goto cs_failed;
257
258	CS_CHECK(RequestConfiguration,
259		pcmcia_request_configuration(link, &link->conf));
260
261	sprintf(dev->node.dev_name, driver_name);
262	dev->node.major = dev->node.minor = 0;
263	link->dev_node = &dev->node;
264
265	printk(KERN_INFO "%s: index 0x%02x: ",
266	       dev->node.dev_name, link->conf.ConfigIndex);
267	if (link->conf.Vpp)
268		printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
269	printk(", irq %d", link->irq.AssignedIRQ);
270	printk(", io 0x%04x-0x%04x", link->io.BasePort1,
271	       link->io.BasePort1+link->io.NumPorts1-1);
272	printk("\n");
273
274	if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
275			< 0) {
276cs_failed:
277		printk("sl811_cs_config failed\n");
278		cs_error(link, last_fn, last_ret);
279		sl811_cs_release(link);
280		return  -ENODEV;
281	}
282	return 0;
283}
284
285static int sl811_cs_probe(struct pcmcia_device *link)
286{
287	local_info_t *local;
288
289	local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
290	if (!local)
291		return -ENOMEM;
292	memset(local, 0, sizeof(local_info_t));
293	local->p_dev = link;
294	link->priv = local;
295
296	/* Initialize */
297	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
298	link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
299	link->irq.Handler = NULL;
300
301	link->conf.Attributes = 0;
302	link->conf.IntType = INT_MEMORY_AND_IO;
303
304	return sl811_cs_config(link);
305}
306
307static struct pcmcia_device_id sl811_ids[] = {
308	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
309	PCMCIA_DEVICE_NULL,
310};
311MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
312
313static struct pcmcia_driver sl811_cs_driver = {
314	.owner		= THIS_MODULE,
315	.drv		= {
316		.name	= (char *)driver_name,
317	},
318	.probe		= sl811_cs_probe,
319	.remove		= sl811_cs_detach,
320	.id_table	= sl811_ids,
321};
322
323/*====================================================================*/
324
325static int __init init_sl811_cs(void)
326{
327	return pcmcia_register_driver(&sl811_cs_driver);
328}
329module_init(init_sl811_cs);
330
331static void __exit exit_sl811_cs(void)
332{
333	pcmcia_unregister_driver(&sl811_cs_driver);
334}
335module_exit(exit_sl811_cs);
336