590405361bed7a14571cde03331174825d72a313
[linux-2.6.git] / drivers / usb / host / sl811_cs.c
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
30 MODULE_AUTHOR("Botond Botyanszki");
31 MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
32 MODULE_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
45 typedef struct local_info_t {
46         struct pcmcia_device    *p_dev;
47 } local_info_t;
48
49 static void sl811_cs_release(struct pcmcia_device * link);
50
51 /*====================================================================*/
52
53 static void release_platform_dev(struct device * dev)
54 {
55         dev_dbg(dev, "sl811_cs platform_dev release\n");
56         dev->parent = NULL;
57 }
58
59 static struct sl811_platform_data platform_data = {
60         .potpg          = 100,
61         .power          = 50,           /* == 100mA */
62         // .reset       = ... FIXME:  invoke CF reset on the card
63 };
64
65 static 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
79 extern struct platform_driver sl811h_driver;
80
81 static 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
91 static 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
117 static 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
127 static 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
135 static 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
181 static 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->config_index);
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) {
212 failed:
213                 printk(KERN_WARNING "sl811_cs_config failed\n");
214                 sl811_cs_release(link);
215                 return  -ENODEV;
216         }
217         return 0;
218 }
219
220 static 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
232         return sl811_cs_config(link);
233 }
234
235 static struct pcmcia_device_id sl811_ids[] = {
236         PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
237         PCMCIA_DEVICE_NULL,
238 };
239 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
240
241 static struct pcmcia_driver sl811_cs_driver = {
242         .owner          = THIS_MODULE,
243         .drv            = {
244                 .name   = "sl811_cs",
245         },
246         .probe          = sl811_cs_probe,
247         .remove         = sl811_cs_detach,
248         .id_table       = sl811_ids,
249 };
250
251 /*====================================================================*/
252
253 static int __init init_sl811_cs(void)
254 {
255         return pcmcia_register_driver(&sl811_cs_driver);
256 }
257 module_init(init_sl811_cs);
258
259 static void __exit exit_sl811_cs(void)
260 {
261         pcmcia_unregister_driver(&sl811_cs_driver);
262 }
263 module_exit(exit_sl811_cs);