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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[mirror_ubuntu-artful-kernel.git] / drivers / usb / host / sl811_cs.c
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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
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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#if defined(DEBUG) || defined(CONFIG_USB_DEBUG) || defined(PCMCIA_DEBUG)
41
42static int pc_debug = 0;
43module_param(pc_debug, int, 0644);
44
45#define DBG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG "sl811_cs: " args)
46
47#else
48#define DBG(n, args...) do{}while(0)
49#endif /* no debugging */
50
51#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
52
53#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
54
55#define CS_CHECK(fn, ret) \
56 do { \
57 last_fn = (fn); \
58 if ((last_ret = (ret)) != 0) \
59 goto cs_failed; \
60 } while (0)
61
62/*====================================================================*/
63/* VARIABLES */
64/*====================================================================*/
65
66static const char driver_name[DEV_NAME_LEN] = "sl811_cs";
67
68static dev_link_t *dev_list = NULL;
69
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70typedef struct local_info_t {
71 dev_link_t link;
72 dev_node_t node;
73} local_info_t;
74
75/*====================================================================*/
76
77static void release_platform_dev(struct device * dev)
78{
79 DBG(0, "sl811_cs platform_dev release\n");
80 dev->parent = NULL;
81}
82
83static struct sl811_platform_data platform_data = {
84 .potpg = 100,
85 .power = 50, /* == 100mA */
86 // .reset = ... FIXME: invoke CF reset on the card
87};
88
89static struct resource resources[] = {
90 [0] = {
91 .flags = IORESOURCE_IRQ,
92 },
93 [1] = {
94 // .name = "address",
95 .flags = IORESOURCE_IO,
96 },
97 [2] = {
98 // .name = "data",
99 .flags = IORESOURCE_IO,
100 },
101};
102
103extern struct device_driver sl811h_driver;
104
105static struct platform_device platform_dev = {
106 .id = -1,
107 .dev = {
108 .platform_data = &platform_data,
109 .release = release_platform_dev,
110 },
111 .resource = resources,
112 .num_resources = ARRAY_SIZE(resources),
113};
114
115static int sl811_hc_init(struct device *parent, ioaddr_t base_addr, int irq)
116{
117 if (platform_dev.dev.parent)
118 return -EBUSY;
119 platform_dev.dev.parent = parent;
120
121 /* finish seting up the platform device */
122 resources[0].start = irq;
123
124 resources[1].start = base_addr;
125 resources[1].end = base_addr;
126
127 resources[2].start = base_addr + 1;
128 resources[2].end = base_addr + 1;
129
130 /* The driver core will probe for us. We know sl811-hcd has been
131 * initialized already because of the link order dependency.
132 */
133 platform_dev.name = sl811h_driver.name;
134 return platform_device_register(&platform_dev);
135}
136
137/*====================================================================*/
138
139static void sl811_cs_detach(dev_link_t *link)
140{
141 dev_link_t **linkp;
142
143 DBG(0, "sl811_cs_detach(0x%p)\n", link);
144
145 /* Locate device structure */
146 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) {
147 if (*linkp == link)
148 break;
149 }
150 if (*linkp == NULL)
151 return;
152
153 /* Break the link with Card Services */
154 if (link->handle)
155 pcmcia_deregister_client(link->handle);
156
157 /* Unlink device structure, and free it */
158 *linkp = link->next;
159 /* This points to the parent local_info_t struct */
160 kfree(link->priv);
161}
162
163static void sl811_cs_release(dev_link_t * link)
164{
165
166 DBG(0, "sl811_cs_release(0x%p)\n", link);
167
168 if (link->open) {
169 DBG(1, "sl811_cs: release postponed, '%s' still open\n",
170 link->dev->dev_name);
171 link->state |= DEV_STALE_CONFIG;
172 return;
173 }
174
175 /* Unlink the device chain */
176 link->dev = NULL;
177
178 platform_device_unregister(&platform_dev);
179 pcmcia_release_configuration(link->handle);
180 if (link->io.NumPorts1)
181 pcmcia_release_io(link->handle, &link->io);
182 if (link->irq.AssignedIRQ)
183 pcmcia_release_irq(link->handle, &link->irq);
184 link->state &= ~DEV_CONFIG;
185
186 if (link->state & DEV_STALE_LINK)
187 sl811_cs_detach(link);
188}
189
190static void sl811_cs_config(dev_link_t *link)
191{
192 client_handle_t handle = link->handle;
193 struct device *parent = &handle_to_dev(handle);
194 local_info_t *dev = link->priv;
195 tuple_t tuple;
196 cisparse_t parse;
197 int last_fn, last_ret;
198 u_char buf[64];
199 config_info_t conf;
200 cistpl_cftable_entry_t dflt = { 0 };
201
202 DBG(0, "sl811_cs_config(0x%p)\n", link);
203
204 tuple.DesiredTuple = CISTPL_CONFIG;
205 tuple.Attributes = 0;
206 tuple.TupleData = buf;
207 tuple.TupleDataMax = sizeof(buf);
208 tuple.TupleOffset = 0;
209 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
210 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
211 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
212 link->conf.ConfigBase = parse.config.base;
213 link->conf.Present = parse.config.rmask[0];
214
215 /* Configure card */
216 link->state |= DEV_CONFIG;
217
218 /* Look up the current Vcc */
219 CS_CHECK(GetConfigurationInfo,
220 pcmcia_get_configuration_info(handle, &conf));
221 link->conf.Vcc = conf.Vcc;
222
223 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
224 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
225 while (1) {
226 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
227
228 if (pcmcia_get_tuple_data(handle, &tuple) != 0
229 || pcmcia_parse_tuple(handle, &tuple, &parse)
230 != 0)
231 goto next_entry;
232
233 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) {
234 dflt = *cfg;
235 }
236
237 if (cfg->index == 0)
238 goto next_entry;
239
240 link->conf.ConfigIndex = cfg->index;
241
242 /* Use power settings for Vcc and Vpp if present */
243 /* Note that the CIS values need to be rescaled */
244 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
245 if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000
246 != conf.Vcc)
247 goto next_entry;
248 } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
249 if (dflt.vcc.param[CISTPL_POWER_VNOM]/10000
250 != conf.Vcc)
251 goto next_entry;
252 }
253
254 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
255 link->conf.Vpp1 = link->conf.Vpp2 =
256 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
257 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
258 link->conf.Vpp1 = link->conf.Vpp2 =
259 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
260
261 /* we need an interrupt */
262 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
263 link->conf.Attributes |= CONF_ENABLE_IRQ;
264
265 /* IO window settings */
266 link->io.NumPorts1 = link->io.NumPorts2 = 0;
267 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
268 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
269
270 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
271 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
272 link->io.BasePort1 = io->win[0].base;
273 link->io.NumPorts1 = io->win[0].len;
274
275 if (pcmcia_request_io(link->handle, &link->io) != 0)
276 goto next_entry;
277 }
278 break;
279
280next_entry:
281 if (link->io.NumPorts1)
282 pcmcia_release_io(link->handle, &link->io);
283 last_ret = pcmcia_get_next_tuple(handle, &tuple);
284 }
285
286 /* require an IRQ and two registers */
287 if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
288 goto cs_failed;
289 if (link->conf.Attributes & CONF_ENABLE_IRQ)
290 CS_CHECK(RequestIRQ,
291 pcmcia_request_irq(link->handle, &link->irq));
292 else
293 goto cs_failed;
294
295 CS_CHECK(RequestConfiguration,
296 pcmcia_request_configuration(link->handle, &link->conf));
297
298 sprintf(dev->node.dev_name, driver_name);
299 dev->node.major = dev->node.minor = 0;
300 link->dev = &dev->node;
301
302 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
303 dev->node.dev_name, link->conf.ConfigIndex,
304 link->conf.Vcc/10, link->conf.Vcc%10);
305 if (link->conf.Vpp1)
306 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
307 printk(", irq %d", link->irq.AssignedIRQ);
308 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
309 link->io.BasePort1+link->io.NumPorts1-1);
310 printk("\n");
311
312 link->state &= ~DEV_CONFIG_PENDING;
313
314 if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
315 < 0) {
316cs_failed:
317 printk("sl811_cs_config failed\n");
318 cs_error(link->handle, last_fn, last_ret);
319 sl811_cs_release(link);
320 link->state &= ~DEV_CONFIG_PENDING;
321 }
322}
323
324static int
325sl811_cs_event(event_t event, int priority, event_callback_args_t *args)
326{
327 dev_link_t *link = args->client_data;
328
329 DBG(1, "sl811_cs_event(0x%06x)\n", event);
330
331 switch (event) {
332 case CS_EVENT_CARD_REMOVAL:
333 link->state &= ~DEV_PRESENT;
334 if (link->state & DEV_CONFIG)
335 sl811_cs_release(link);
336 break;
337
338 case CS_EVENT_CARD_INSERTION:
339 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
340 sl811_cs_config(link);
341 break;
342
343 case CS_EVENT_PM_SUSPEND:
344 link->state |= DEV_SUSPEND;
345 /* Fall through... */
346 case CS_EVENT_RESET_PHYSICAL:
347 if (link->state & DEV_CONFIG)
348 pcmcia_release_configuration(link->handle);
349 break;
350
351 case CS_EVENT_PM_RESUME:
352 link->state &= ~DEV_SUSPEND;
353 /* Fall through... */
354 case CS_EVENT_CARD_RESET:
355 if (link->state & DEV_CONFIG)
356 pcmcia_request_configuration(link->handle, &link->conf);
357 DBG(0, "reset sl811-hcd here?\n");
358 break;
359 }
360 return 0;
361}
362
363static dev_link_t *sl811_cs_attach(void)
364{
365 local_info_t *local;
366 dev_link_t *link;
367 client_reg_t client_reg;
22f3a8f5 368 int ret;
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369
370 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
371 if (!local)
372 return NULL;
373 memset(local, 0, sizeof(local_info_t));
374 link = &local->link;
375 link->priv = local;
376
377 /* Initialize */
378 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
379 link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
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380 link->irq.Handler = NULL;
381
382 link->conf.Attributes = 0;
383 link->conf.Vcc = 33;
384 link->conf.IntType = INT_MEMORY_AND_IO;
385
386 /* Register with Card Services */
387 link->next = dev_list;
388 dev_list = link;
389 client_reg.dev_info = (dev_info_t *) &driver_name;
390 client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
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391 client_reg.Version = 0x0210;
392 client_reg.event_callback_args.client_data = link;
393 ret = pcmcia_register_client(&link->handle, &client_reg);
394 if (ret != CS_SUCCESS) {
395 cs_error(link->handle, RegisterClient, ret);
396 sl811_cs_detach(link);
397 return NULL;
398 }
399
400 return link;
401}
402
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403static struct pcmcia_device_id sl811_ids[] = {
404 PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
405 PCMCIA_DEVICE_NULL,
406};
407MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
408
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409static struct pcmcia_driver sl811_cs_driver = {
410 .owner = THIS_MODULE,
411 .drv = {
412 .name = (char *)driver_name,
413 },
414 .attach = sl811_cs_attach,
1e212f36 415 .event = sl811_cs_event,
c6de2b64 416 .detach = sl811_cs_detach,
22f3a8f5 417 .id_table = sl811_ids,
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418};
419
420/*====================================================================*/
421
422static int __init init_sl811_cs(void)
423{
424 return pcmcia_register_driver(&sl811_cs_driver);
425}
426module_init(init_sl811_cs);
427
428static void __exit exit_sl811_cs(void)
429{
430 pcmcia_unregister_driver(&sl811_cs_driver);
431}
432module_exit(exit_sl811_cs);