[PATCH] pcmcia: embed dev_link_t into struct pcmcia_device
[linux-3.10.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/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
32 MODULE_AUTHOR("Botond Botyanszki");
33 MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
34 MODULE_LICENSE("GPL");
35
36
37 /*====================================================================*/
38 /* MACROS                                                             */
39 /*====================================================================*/
40
41 #if defined(DEBUG) || defined(PCMCIA_DEBUG)
42
43 static int pc_debug = 0;
44 module_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
67 static const char driver_name[DEV_NAME_LEN]  = "sl811_cs";
68
69 typedef struct local_info_t {
70         struct pcmcia_device    *p_dev;
71         dev_node_t              node;
72 } local_info_t;
73
74 static void sl811_cs_release(dev_link_t * link);
75
76 /*====================================================================*/
77
78 static void release_platform_dev(struct device * dev)
79 {
80         DBG(0, "sl811_cs platform_dev release\n");
81         dev->parent = NULL;
82 }
83
84 static struct sl811_platform_data platform_data = {
85         .potpg          = 100,
86         .power          = 50,           /* == 100mA */
87         // .reset       = ... FIXME:  invoke CF reset on the card
88 };
89
90 static 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
104 extern struct platform_driver sl811h_driver;
105
106 static 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
116 static 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
141 static void sl811_cs_detach(struct pcmcia_device *p_dev)
142 {
143         dev_link_t *link = dev_to_instance(p_dev);
144
145         DBG(0, "sl811_cs_detach(0x%p)\n", link);
146
147         link->state &= ~DEV_PRESENT;
148         if (link->state & DEV_CONFIG)
149                 sl811_cs_release(link);
150
151         /* This points to the parent local_info_t struct */
152         kfree(link->priv);
153 }
154
155 static void sl811_cs_release(dev_link_t * link)
156 {
157         DBG(0, "sl811_cs_release(0x%p)\n", link);
158
159         pcmcia_disable_device(link->handle);
160         platform_device_unregister(&platform_dev);
161 }
162
163 static void sl811_cs_config(dev_link_t *link)
164 {
165         client_handle_t         handle = link->handle;
166         struct device           *parent = &handle_to_dev(handle);
167         local_info_t            *dev = link->priv;
168         tuple_t                 tuple;
169         cisparse_t              parse;
170         int                     last_fn, last_ret;
171         u_char                  buf[64];
172         config_info_t           conf;
173         cistpl_cftable_entry_t  dflt = { 0 };
174
175         DBG(0, "sl811_cs_config(0x%p)\n", link);
176
177         tuple.DesiredTuple = CISTPL_CONFIG;
178         tuple.Attributes = 0;
179         tuple.TupleData = buf;
180         tuple.TupleDataMax = sizeof(buf);
181         tuple.TupleOffset = 0;
182         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
183         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
184         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
185         link->conf.ConfigBase = parse.config.base;
186         link->conf.Present = parse.config.rmask[0];
187
188         /* Configure card */
189         link->state |= DEV_CONFIG;
190
191         /* Look up the current Vcc */
192         CS_CHECK(GetConfigurationInfo,
193                         pcmcia_get_configuration_info(handle, &conf));
194
195         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
196         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
197         while (1) {
198                 cistpl_cftable_entry_t  *cfg = &(parse.cftable_entry);
199
200                 if (pcmcia_get_tuple_data(handle, &tuple) != 0
201                                 || pcmcia_parse_tuple(handle, &tuple, &parse)
202                                                 != 0)
203                         goto next_entry;
204
205                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) {
206                         dflt = *cfg;
207                 }
208
209                 if (cfg->index == 0)
210                         goto next_entry;
211
212                 link->conf.ConfigIndex = cfg->index;
213
214                 /* Use power settings for Vcc and Vpp if present */
215                 /*  Note that the CIS values need to be rescaled */
216                 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
217                         if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000
218                                         != conf.Vcc)
219                                 goto next_entry;
220                 } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
221                         if (dflt.vcc.param[CISTPL_POWER_VNOM]/10000
222                                         != conf.Vcc)
223                                 goto next_entry;
224                 }
225
226                 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
227                         link->conf.Vpp =
228                                 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
229                 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
230                         link->conf.Vpp =
231                                 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
232
233                 /* we need an interrupt */
234                 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
235                         link->conf.Attributes |= CONF_ENABLE_IRQ;
236
237                 /* IO window settings */
238                 link->io.NumPorts1 = link->io.NumPorts2 = 0;
239                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
240                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
241
242                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
243                         link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
244                         link->io.BasePort1 = io->win[0].base;
245                         link->io.NumPorts1 = io->win[0].len;
246
247                         if (pcmcia_request_io(link->handle, &link->io) != 0)
248                                 goto next_entry;
249                 }
250                 break;
251
252 next_entry:
253                 pcmcia_disable_device(handle);
254                 last_ret = pcmcia_get_next_tuple(handle, &tuple);
255         }
256
257         /* require an IRQ and two registers */
258         if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
259                 goto cs_failed;
260         if (link->conf.Attributes & CONF_ENABLE_IRQ)
261                 CS_CHECK(RequestIRQ,
262                         pcmcia_request_irq(link->handle, &link->irq));
263         else
264                 goto cs_failed;
265
266         CS_CHECK(RequestConfiguration,
267                 pcmcia_request_configuration(link->handle, &link->conf));
268
269         sprintf(dev->node.dev_name, driver_name);
270         dev->node.major = dev->node.minor = 0;
271         link->dev_node = &dev->node;
272
273         printk(KERN_INFO "%s: index 0x%02x: ",
274                dev->node.dev_name, link->conf.ConfigIndex);
275         if (link->conf.Vpp)
276                 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
277         printk(", irq %d", link->irq.AssignedIRQ);
278         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
279                link->io.BasePort1+link->io.NumPorts1-1);
280         printk("\n");
281
282         link->state &= ~DEV_CONFIG_PENDING;
283
284         if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
285                         < 0) {
286 cs_failed:
287                 printk("sl811_cs_config failed\n");
288                 cs_error(link->handle, last_fn, last_ret);
289                 sl811_cs_release(link);
290                 link->state &= ~DEV_CONFIG_PENDING;
291         }
292 }
293
294 static int sl811_cs_attach(struct pcmcia_device *p_dev)
295 {
296         local_info_t *local;
297         dev_link_t *link = dev_to_instance(p_dev);
298
299         local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
300         if (!local)
301                 return -ENOMEM;
302         memset(local, 0, sizeof(local_info_t));
303         local->p_dev = p_dev;
304         link->priv = local;
305
306         /* Initialize */
307         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
308         link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
309         link->irq.Handler = NULL;
310
311         link->conf.Attributes = 0;
312         link->conf.IntType = INT_MEMORY_AND_IO;
313
314         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
315         sl811_cs_config(link);
316
317         return 0;
318 }
319
320 static struct pcmcia_device_id sl811_ids[] = {
321         PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
322         PCMCIA_DEVICE_NULL,
323 };
324 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
325
326 static struct pcmcia_driver sl811_cs_driver = {
327         .owner          = THIS_MODULE,
328         .drv            = {
329                 .name   = (char *)driver_name,
330         },
331         .probe          = sl811_cs_attach,
332         .remove         = sl811_cs_detach,
333         .id_table       = sl811_ids,
334 };
335
336 /*====================================================================*/
337
338 static int __init init_sl811_cs(void)
339 {
340         return pcmcia_register_driver(&sl811_cs_driver);
341 }
342 module_init(init_sl811_cs);
343
344 static void __exit exit_sl811_cs(void)
345 {
346         pcmcia_unregister_driver(&sl811_cs_driver);
347 }
348 module_exit(exit_sl811_cs);