sl811_cs.c revision 9b44de2015ff4a2ed1d56efedfcc72b917d356a6 
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_types.h>
24#include <pcmcia/cs.h>
25#include <pcmcia/cistpl.h>
26#include <pcmcia/cisreg.h>
27#include <pcmcia/ds.h>
28
29#include <linux/usb/sl811.h>
30
31MODULE_AUTHOR("Botond Botyanszki");
32MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
33MODULE_LICENSE("GPL");
34
35
36/*====================================================================*/
37/* MACROS                                                             */
38/*====================================================================*/
39
40#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
41
42/*====================================================================*/
43/* VARIABLES                                                          */
44/*====================================================================*/
45
46static const char driver_name[DEV_NAME_LEN]  = "sl811_cs";
47
48typedef struct local_info_t {
49	struct pcmcia_device	*p_dev;
50	dev_node_t		node;
51} local_info_t;
52
53static void sl811_cs_release(struct pcmcia_device * link);
54
55/*====================================================================*/
56
57static void release_platform_dev(struct device * dev)
58{
59	dev_dbg(dev, "sl811_cs platform_dev release\n");
60	dev->parent = NULL;
61}
62
63static struct sl811_platform_data platform_data = {
64	.potpg		= 100,
65	.power		= 50,		/* == 100mA */
66	// .reset	= ... FIXME:  invoke CF reset on the card
67};
68
69static struct resource resources[] = {
70	[0] = {
71		.flags	= IORESOURCE_IRQ,
72	},
73	[1] = {
74		// .name   = "address",
75		.flags	= IORESOURCE_IO,
76	},
77	[2] = {
78		// .name   = "data",
79		.flags	= IORESOURCE_IO,
80	},
81};
82
83extern struct platform_driver sl811h_driver;
84
85static struct platform_device platform_dev = {
86	.id			= -1,
87	.dev = {
88		.platform_data = &platform_data,
89		.release       = release_platform_dev,
90	},
91	.resource		= resources,
92	.num_resources		= ARRAY_SIZE(resources),
93};
94
95static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
96			 int irq)
97{
98	if (platform_dev.dev.parent)
99		return -EBUSY;
100	platform_dev.dev.parent = parent;
101
102	/* finish seting up the platform device */
103	resources[0].start = irq;
104
105	resources[1].start = base_addr;
106	resources[1].end = base_addr;
107
108	resources[2].start = base_addr + 1;
109	resources[2].end   = base_addr + 1;
110
111	/* The driver core will probe for us.  We know sl811-hcd has been
112	 * initialized already because of the link order dependency created
113	 * by referencing "sl811h_driver".
114	 */
115	platform_dev.name = sl811h_driver.driver.name;
116	return platform_device_register(&platform_dev);
117}
118
119/*====================================================================*/
120
121static void sl811_cs_detach(struct pcmcia_device *link)
122{
123	dev_dbg(&link->dev, "sl811_cs_detach\n");
124
125	sl811_cs_release(link);
126
127	/* This points to the parent local_info_t struct */
128	kfree(link->priv);
129}
130
131static void sl811_cs_release(struct pcmcia_device * link)
132{
133	dev_dbg(&link->dev, "sl811_cs_release\n");
134
135	pcmcia_disable_device(link);
136	platform_device_unregister(&platform_dev);
137}
138
139static int sl811_cs_config_check(struct pcmcia_device *p_dev,
140				 cistpl_cftable_entry_t *cfg,
141				 cistpl_cftable_entry_t *dflt,
142				 unsigned int vcc,
143				 void *priv_data)
144{
145	if (cfg->index == 0)
146		return -ENODEV;
147
148	/* Use power settings for Vcc and Vpp if present */
149	/*  Note that the CIS values need to be rescaled */
150	if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
151		if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
152			return -ENODEV;
153	} else if (dflt->vcc.present & (1<<CISTPL_POWER_VNOM)) {
154		if (dflt->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
155			return -ENODEV;
156		}
157
158	if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
159		p_dev->conf.Vpp =
160			cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
161	else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
162		p_dev->conf.Vpp =
163			dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
164
165	/* we need an interrupt */
166	if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
167		p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
168
169	/* IO window settings */
170	p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
171	if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
172		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
173
174		p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
175		p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
176		p_dev->io.BasePort1 = io->win[0].base;
177		p_dev->io.NumPorts1 = io->win[0].len;
178
179		return pcmcia_request_io(p_dev, &p_dev->io);
180	}
181	pcmcia_disable_device(p_dev);
182	return -ENODEV;
183}
184
185
186static int sl811_cs_config(struct pcmcia_device *link)
187{
188	struct device		*parent = &handle_to_dev(link);
189	local_info_t		*dev = link->priv;
190	int			ret;
191
192	dev_dbg(&link->dev, "sl811_cs_config\n");
193
194	if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
195		goto failed;
196
197	/* require an IRQ and two registers */
198	if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
199		goto failed;
200	if (link->conf.Attributes & CONF_ENABLE_IRQ) {
201		ret = pcmcia_request_irq(link, &link->irq);
202		if (ret)
203			goto failed;
204	} else
205		goto failed;
206
207	ret = pcmcia_request_configuration(link, &link->conf);
208	if (ret)
209		goto failed;
210
211	sprintf(dev->node.dev_name, driver_name);
212	dev->node.major = dev->node.minor = 0;
213	link->dev_node = &dev->node;
214
215	printk(KERN_INFO "%s: index 0x%02x: ",
216	       dev->node.dev_name, link->conf.ConfigIndex);
217	if (link->conf.Vpp)
218		printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
219	printk(", irq %d", link->irq.AssignedIRQ);
220	printk(", io 0x%04x-0x%04x", link->io.BasePort1,
221	       link->io.BasePort1+link->io.NumPorts1-1);
222	printk("\n");
223
224	if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
225			< 0) {
226failed:
227		printk(KERN_WARNING "sl811_cs_config failed\n");
228		sl811_cs_release(link);
229		return  -ENODEV;
230	}
231	return 0;
232}
233
234static int sl811_cs_probe(struct pcmcia_device *link)
235{
236	local_info_t *local;
237
238	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
239	if (!local)
240		return -ENOMEM;
241	local->p_dev = link;
242	link->priv = local;
243
244	/* Initialize */
245	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
246	link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
247	link->irq.Handler = NULL;
248
249	link->conf.Attributes = 0;
250	link->conf.IntType = INT_MEMORY_AND_IO;
251
252	return sl811_cs_config(link);
253}
254
255static struct pcmcia_device_id sl811_ids[] = {
256	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
257	PCMCIA_DEVICE_NULL,
258};
259MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
260
261static struct pcmcia_driver sl811_cs_driver = {
262	.owner		= THIS_MODULE,
263	.drv		= {
264		.name	= (char *)driver_name,
265	},
266	.probe		= sl811_cs_probe,
267	.remove		= sl811_cs_detach,
268	.id_table	= sl811_ids,
269};
270
271/*====================================================================*/
272
273static int __init init_sl811_cs(void)
274{
275	return pcmcia_register_driver(&sl811_cs_driver);
276}
277module_init(init_sl811_cs);
278
279static void __exit exit_sl811_cs(void)
280{
281	pcmcia_unregister_driver(&sl811_cs_driver);
282}
283module_exit(exit_sl811_cs);
284