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1 | /* |
2 | * PCMCIA high-level CIS access functions |
3 | * |
4 | * The initial developer of the original code is David A. Hinds |
5 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds |
6 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. |
7 | * |
8 | * Copyright (C) 1999 David A. Hinds |
9 | * Copyright (C) 2004-2010 Dominik Brodowski |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License version 2 as |
13 | * published by the Free Software Foundation. |
14 | * |
15 | */ |
16 | |
17 | #include <linux/slab.h> |
18 | #include <linux/module.h> |
19 | #include <linux/kernel.h> |
20 | #include <linux/netdevice.h> |
21 | |
22 | #include <pcmcia/cisreg.h> |
23 | #include <pcmcia/cistpl.h> |
24 | #include <pcmcia/ss.h> |
25 | #include <pcmcia/ds.h> |
26 | #include "cs_internal.h" |
27 | |
28 | |
29 | /** |
30 | * pccard_read_tuple() - internal CIS tuple access |
31 | * @s: the struct pcmcia_socket where the card is inserted |
32 | * @function: the device function we loop for |
33 | * @code: which CIS code shall we look for? |
34 | * @parse: buffer where the tuple shall be parsed (or NULL, if no parse) |
35 | * |
36 | * pccard_read_tuple() reads out one tuple and attempts to parse it |
37 | */ |
38 | int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function, |
39 | cisdata_t code, void *parse) |
40 | { |
41 | tuple_t tuple; |
42 | cisdata_t *buf; |
43 | int ret; |
44 | |
45 | buf = kmalloc(256, GFP_KERNEL); |
46 | if (buf == NULL) { |
47 | dev_printk(KERN_WARNING, &s->dev, "no memory to read tuple\n"); |
48 | return -ENOMEM; |
49 | } |
50 | tuple.DesiredTuple = code; |
51 | tuple.Attributes = 0; |
52 | if (function == BIND_FN_ALL) |
53 | tuple.Attributes = TUPLE_RETURN_COMMON; |
54 | ret = pccard_get_first_tuple(s, function, &tuple); |
55 | if (ret != 0) |
56 | goto done; |
57 | tuple.TupleData = buf; |
58 | tuple.TupleOffset = 0; |
59 | tuple.TupleDataMax = 255; |
60 | ret = pccard_get_tuple_data(s, &tuple); |
61 | if (ret != 0) |
62 | goto done; |
63 | ret = pcmcia_parse_tuple(&tuple, parse); |
64 | done: |
65 | kfree(buf); |
66 | return ret; |
67 | } |
68 | |
69 | |
70 | /** |
71 | * pccard_loop_tuple() - loop over tuples in the CIS |
72 | * @s: the struct pcmcia_socket where the card is inserted |
73 | * @function: the device function we loop for |
74 | * @code: which CIS code shall we look for? |
75 | * @parse: buffer where the tuple shall be parsed (or NULL, if no parse) |
76 | * @priv_data: private data to be passed to the loop_tuple function. |
77 | * @loop_tuple: function to call for each CIS entry of type @function. IT |
78 | * gets passed the raw tuple, the paresed tuple (if @parse is |
79 | * set) and @priv_data. |
80 | * |
81 | * pccard_loop_tuple() loops over all CIS entries of type @function, and |
82 | * calls the @loop_tuple function for each entry. If the call to @loop_tuple |
83 | * returns 0, the loop exits. Returns 0 on success or errorcode otherwise. |
84 | */ |
85 | int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function, |
86 | cisdata_t code, cisparse_t *parse, void *priv_data, |
87 | int (*loop_tuple) (tuple_t *tuple, |
88 | cisparse_t *parse, |
89 | void *priv_data)) |
90 | { |
91 | tuple_t tuple; |
92 | cisdata_t *buf; |
93 | int ret; |
94 | |
95 | buf = kzalloc(256, GFP_KERNEL); |
96 | if (buf == NULL) { |
97 | dev_printk(KERN_WARNING, &s->dev, "no memory to read tuple\n"); |
98 | return -ENOMEM; |
99 | } |
100 | |
101 | tuple.TupleData = buf; |
102 | tuple.TupleDataMax = 255; |
103 | tuple.TupleOffset = 0; |
104 | tuple.DesiredTuple = code; |
105 | tuple.Attributes = 0; |
106 | |
107 | ret = pccard_get_first_tuple(s, function, &tuple); |
108 | while (!ret) { |
109 | if (pccard_get_tuple_data(s, &tuple)) |
110 | goto next_entry; |
111 | |
112 | if (parse) |
113 | if (pcmcia_parse_tuple(&tuple, parse)) |
114 | goto next_entry; |
115 | |
116 | ret = loop_tuple(&tuple, parse, priv_data); |
117 | if (!ret) |
118 | break; |
119 | |
120 | next_entry: |
121 | ret = pccard_get_next_tuple(s, function, &tuple); |
122 | } |
123 | |
124 | kfree(buf); |
125 | return ret; |
126 | } |
127 | |
128 | |
129 | /** |
130 | * pcmcia_io_cfg_data_width() - convert cfgtable to data path width parameter |
131 | */ |
132 | static int pcmcia_io_cfg_data_width(unsigned int flags) |
133 | { |
134 | if (!(flags & CISTPL_IO_8BIT)) |
135 | return IO_DATA_PATH_WIDTH_16; |
136 | if (!(flags & CISTPL_IO_16BIT)) |
137 | return IO_DATA_PATH_WIDTH_8; |
138 | return IO_DATA_PATH_WIDTH_AUTO; |
139 | } |
140 | |
141 | |
142 | struct pcmcia_cfg_mem { |
143 | struct pcmcia_device *p_dev; |
144 | int (*conf_check) (struct pcmcia_device *p_dev, void *priv_data); |
145 | void *priv_data; |
146 | cisparse_t parse; |
147 | cistpl_cftable_entry_t dflt; |
148 | }; |
149 | |
150 | /** |
151 | * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config() |
152 | * |
153 | * pcmcia_do_loop_config() is the internal callback for the call from |
154 | * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred |
155 | * by a struct pcmcia_cfg_mem. |
156 | */ |
157 | static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv) |
158 | { |
159 | struct pcmcia_cfg_mem *cfg_mem = priv; |
160 | struct pcmcia_device *p_dev = cfg_mem->p_dev; |
161 | cistpl_cftable_entry_t *cfg = &parse->cftable_entry; |
162 | cistpl_cftable_entry_t *dflt = &cfg_mem->dflt; |
163 | unsigned int flags = p_dev->config_flags; |
164 | unsigned int vcc = p_dev->socket->socket.Vcc; |
165 | |
166 | dev_dbg(&p_dev->dev, "testing configuration %x, autoconf %x\n", |
167 | cfg->index, flags); |
168 | |
169 | /* default values */ |
170 | cfg_mem->p_dev->config_index = cfg->index; |
171 | if (cfg->flags & CISTPL_CFTABLE_DEFAULT) |
172 | cfg_mem->dflt = *cfg; |
173 | |
174 | /* check for matching Vcc? */ |
175 | if (flags & CONF_AUTO_CHECK_VCC) { |
176 | if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) { |
177 | if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000) |
178 | return -ENODEV; |
179 | } else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) { |
180 | if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000) |
181 | return -ENODEV; |
182 | } |
183 | } |
184 | |
185 | /* set Vpp? */ |
186 | if (flags & CONF_AUTO_SET_VPP) { |
187 | if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM)) |
188 | p_dev->vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000; |
189 | else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM)) |
190 | p_dev->vpp = |
191 | dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000; |
192 | } |
193 | |
194 | /* enable audio? */ |
195 | if ((flags & CONF_AUTO_AUDIO) && (cfg->flags & CISTPL_CFTABLE_AUDIO)) |
196 | p_dev->config_flags |= CONF_ENABLE_SPKR; |
197 | |
198 | |
199 | /* IO window settings? */ |
200 | if (flags & CONF_AUTO_SET_IO) { |
201 | cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; |
202 | int i = 0; |
203 | |
204 | p_dev->resource[0]->start = p_dev->resource[0]->end = 0; |
205 | p_dev->resource[1]->start = p_dev->resource[1]->end = 0; |
206 | if (io->nwin == 0) |
207 | return -ENODEV; |
208 | |
209 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; |
210 | p_dev->resource[0]->flags |= |
211 | pcmcia_io_cfg_data_width(io->flags); |
212 | if (io->nwin > 1) { |
213 | /* For multifunction cards, by convention, we |
214 | * configure the network function with window 0, |
215 | * and serial with window 1 */ |
216 | i = (io->win[1].len > io->win[0].len); |
217 | p_dev->resource[1]->flags = p_dev->resource[0]->flags; |
218 | p_dev->resource[1]->start = io->win[1-i].base; |
219 | p_dev->resource[1]->end = io->win[1-i].len; |
220 | } |
221 | p_dev->resource[0]->start = io->win[i].base; |
222 | p_dev->resource[0]->end = io->win[i].len; |
223 | p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK; |
224 | } |
225 | |
226 | /* MEM window settings? */ |
227 | if (flags & CONF_AUTO_SET_IOMEM) { |
228 | /* so far, we only set one memory window */ |
229 | cistpl_mem_t *mem = (cfg->mem.nwin) ? &cfg->mem : &dflt->mem; |
230 | |
231 | p_dev->resource[2]->start = p_dev->resource[2]->end = 0; |
232 | if (mem->nwin == 0) |
233 | return -ENODEV; |
234 | |
235 | p_dev->resource[2]->start = mem->win[0].host_addr; |
236 | p_dev->resource[2]->end = mem->win[0].len; |
237 | if (p_dev->resource[2]->end < 0x1000) |
238 | p_dev->resource[2]->end = 0x1000; |
239 | p_dev->card_addr = mem->win[0].card_addr; |
240 | } |
241 | |
242 | dev_dbg(&p_dev->dev, |
243 | "checking configuration %x: %pr %pr %pr (%d lines)\n", |
244 | p_dev->config_index, p_dev->resource[0], p_dev->resource[1], |
245 | p_dev->resource[2], p_dev->io_lines); |
246 | |
247 | return cfg_mem->conf_check(p_dev, cfg_mem->priv_data); |
248 | } |
249 | |
250 | /** |
251 | * pcmcia_loop_config() - loop over configuration options |
252 | * @p_dev: the struct pcmcia_device which we need to loop for. |
253 | * @conf_check: function to call for each configuration option. |
254 | * It gets passed the struct pcmcia_device and private data |
255 | * being passed to pcmcia_loop_config() |
256 | * @priv_data: private data to be passed to the conf_check function. |
257 | * |
258 | * pcmcia_loop_config() loops over all configuration options, and calls |
259 | * the driver-specific conf_check() for each one, checking whether |
260 | * it is a valid one. Returns 0 on success or errorcode otherwise. |
261 | */ |
262 | int pcmcia_loop_config(struct pcmcia_device *p_dev, |
263 | int (*conf_check) (struct pcmcia_device *p_dev, |
264 | void *priv_data), |
265 | void *priv_data) |
266 | { |
267 | struct pcmcia_cfg_mem *cfg_mem; |
268 | int ret; |
269 | |
270 | cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL); |
271 | if (cfg_mem == NULL) |
272 | return -ENOMEM; |
273 | |
274 | cfg_mem->p_dev = p_dev; |
275 | cfg_mem->conf_check = conf_check; |
276 | cfg_mem->priv_data = priv_data; |
277 | |
278 | ret = pccard_loop_tuple(p_dev->socket, p_dev->func, |
279 | CISTPL_CFTABLE_ENTRY, &cfg_mem->parse, |
280 | cfg_mem, pcmcia_do_loop_config); |
281 | |
282 | kfree(cfg_mem); |
283 | return ret; |
284 | } |
285 | EXPORT_SYMBOL(pcmcia_loop_config); |
286 | |
287 | |
288 | struct pcmcia_loop_mem { |
289 | struct pcmcia_device *p_dev; |
290 | void *priv_data; |
291 | int (*loop_tuple) (struct pcmcia_device *p_dev, |
292 | tuple_t *tuple, |
293 | void *priv_data); |
294 | }; |
295 | |
296 | /** |
297 | * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config() |
298 | * |
299 | * pcmcia_do_loop_tuple() is the internal callback for the call from |
300 | * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred |
301 | * by a struct pcmcia_cfg_mem. |
302 | */ |
303 | static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv) |
304 | { |
305 | struct pcmcia_loop_mem *loop = priv; |
306 | |
307 | return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data); |
308 | }; |
309 | |
310 | /** |
311 | * pcmcia_loop_tuple() - loop over tuples in the CIS |
312 | * @p_dev: the struct pcmcia_device which we need to loop for. |
313 | * @code: which CIS code shall we look for? |
314 | * @priv_data: private data to be passed to the loop_tuple function. |
315 | * @loop_tuple: function to call for each CIS entry of type @function. IT |
316 | * gets passed the raw tuple and @priv_data. |
317 | * |
318 | * pcmcia_loop_tuple() loops over all CIS entries of type @function, and |
319 | * calls the @loop_tuple function for each entry. If the call to @loop_tuple |
320 | * returns 0, the loop exits. Returns 0 on success or errorcode otherwise. |
321 | */ |
322 | int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code, |
323 | int (*loop_tuple) (struct pcmcia_device *p_dev, |
324 | tuple_t *tuple, |
325 | void *priv_data), |
326 | void *priv_data) |
327 | { |
328 | struct pcmcia_loop_mem loop = { |
329 | .p_dev = p_dev, |
330 | .loop_tuple = loop_tuple, |
331 | .priv_data = priv_data}; |
332 | |
333 | return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL, |
334 | &loop, pcmcia_do_loop_tuple); |
335 | } |
336 | EXPORT_SYMBOL(pcmcia_loop_tuple); |
337 | |
338 | |
339 | struct pcmcia_loop_get { |
340 | size_t len; |
341 | cisdata_t **buf; |
342 | }; |
343 | |
344 | /** |
345 | * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple() |
346 | * |
347 | * pcmcia_do_get_tuple() is the internal callback for the call from |
348 | * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in |
349 | * the first tuple, return 0 unconditionally. Create a memory buffer large |
350 | * enough to hold the content of the tuple, and fill it with the tuple data. |
351 | * The caller is responsible to free the buffer. |
352 | */ |
353 | static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple, |
354 | void *priv) |
355 | { |
356 | struct pcmcia_loop_get *get = priv; |
357 | |
358 | *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL); |
359 | if (*get->buf) { |
360 | get->len = tuple->TupleDataLen; |
361 | memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen); |
362 | } else |
363 | dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n"); |
364 | return 0; |
365 | } |
366 | |
367 | /** |
368 | * pcmcia_get_tuple() - get first tuple from CIS |
369 | * @p_dev: the struct pcmcia_device which we need to loop for. |
370 | * @code: which CIS code shall we look for? |
371 | * @buf: pointer to store the buffer to. |
372 | * |
373 | * pcmcia_get_tuple() gets the content of the first CIS entry of type @code. |
374 | * It returns the buffer length (or zero). The caller is responsible to free |
375 | * the buffer passed in @buf. |
376 | */ |
377 | size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code, |
378 | unsigned char **buf) |
379 | { |
380 | struct pcmcia_loop_get get = { |
381 | .len = 0, |
382 | .buf = buf, |
383 | }; |
384 | |
385 | *get.buf = NULL; |
386 | pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get); |
387 | |
388 | return get.len; |
389 | } |
390 | EXPORT_SYMBOL(pcmcia_get_tuple); |
391 | |
392 | |
393 | /** |
394 | * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis() |
395 | * |
396 | * pcmcia_do_get_mac() is the internal callback for the call from |
397 | * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the |
398 | * tuple contains a proper LAN_NODE_ID of length 6, and copy the data |
399 | * to struct net_device->dev_addr[i]. |
400 | */ |
401 | static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple, |
402 | void *priv) |
403 | { |
404 | struct net_device *dev = priv; |
405 | int i; |
406 | |
407 | if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID) |
408 | return -EINVAL; |
409 | if (tuple->TupleDataLen < ETH_ALEN + 2) { |
410 | dev_warn(&p_dev->dev, "Invalid CIS tuple length for " |
411 | "LAN_NODE_ID\n"); |
412 | return -EINVAL; |
413 | } |
414 | |
415 | if (tuple->TupleData[1] != ETH_ALEN) { |
416 | dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n"); |
417 | return -EINVAL; |
418 | } |
419 | for (i = 0; i < 6; i++) |
420 | dev->dev_addr[i] = tuple->TupleData[i+2]; |
421 | return 0; |
422 | } |
423 | |
424 | /** |
425 | * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE |
426 | * @p_dev: the struct pcmcia_device for which we want the address. |
427 | * @dev: a properly prepared struct net_device to store the info to. |
428 | * |
429 | * pcmcia_get_mac_from_cis() reads out the hardware MAC address from |
430 | * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which |
431 | * must be set up properly by the driver (see examples!). |
432 | */ |
433 | int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev) |
434 | { |
435 | return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev); |
436 | } |
437 | EXPORT_SYMBOL(pcmcia_get_mac_from_cis); |
438 | |
439 |
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