1 // SPDX-License-Identifier: GPL-2.0-only
3 * PCMCIA high-level CIS access functions
5 * The initial developer of the original code is David A. Hinds
6 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
7 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
9 * Copyright (C) 1999 David A. Hinds
10 * Copyright (C) 2004-2010 Dominik Brodowski
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/netdevice.h>
17 #include <linux/etherdevice.h>
19 #include <pcmcia/cisreg.h>
20 #include <pcmcia/cistpl.h>
21 #include <pcmcia/ss.h>
22 #include <pcmcia/ds.h>
23 #include "cs_internal.h"
27 * pccard_read_tuple() - internal CIS tuple access
28 * @s: the struct pcmcia_socket where the card is inserted
29 * @function: the device function we loop for
30 * @code: which CIS code shall we look for?
31 * @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
33 * pccard_read_tuple() reads out one tuple and attempts to parse it
35 int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function,
36 cisdata_t code, void *parse)
42 buf = kmalloc(256, GFP_KERNEL);
44 dev_warn(&s->dev, "no memory to read tuple\n");
47 tuple.DesiredTuple = code;
49 if (function == BIND_FN_ALL)
50 tuple.Attributes = TUPLE_RETURN_COMMON;
51 ret = pccard_get_first_tuple(s, function, &tuple);
54 tuple.TupleData = buf;
55 tuple.TupleOffset = 0;
56 tuple.TupleDataMax = 255;
57 ret = pccard_get_tuple_data(s, &tuple);
60 ret = pcmcia_parse_tuple(&tuple, parse);
68 * pccard_loop_tuple() - loop over tuples in the CIS
69 * @s: the struct pcmcia_socket where the card is inserted
70 * @function: the device function we loop for
71 * @code: which CIS code shall we look for?
72 * @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
73 * @priv_data: private data to be passed to the loop_tuple function.
74 * @loop_tuple: function to call for each CIS entry of type @function. IT
75 * gets passed the raw tuple, the paresed tuple (if @parse is
76 * set) and @priv_data.
78 * pccard_loop_tuple() loops over all CIS entries of type @function, and
79 * calls the @loop_tuple function for each entry. If the call to @loop_tuple
80 * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
82 static int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
83 cisdata_t code, cisparse_t *parse, void *priv_data,
84 int (*loop_tuple) (tuple_t *tuple,
92 buf = kzalloc(256, GFP_KERNEL);
94 dev_warn(&s->dev, "no memory to read tuple\n");
98 tuple.TupleData = buf;
99 tuple.TupleDataMax = 255;
100 tuple.TupleOffset = 0;
101 tuple.DesiredTuple = code;
102 tuple.Attributes = 0;
104 ret = pccard_get_first_tuple(s, function, &tuple);
106 if (pccard_get_tuple_data(s, &tuple))
110 if (pcmcia_parse_tuple(&tuple, parse))
113 ret = loop_tuple(&tuple, parse, priv_data);
118 ret = pccard_get_next_tuple(s, function, &tuple);
127 * pcmcia_io_cfg_data_width() - convert cfgtable to data path width parameter
129 static int pcmcia_io_cfg_data_width(unsigned int flags)
131 if (!(flags & CISTPL_IO_8BIT))
132 return IO_DATA_PATH_WIDTH_16;
133 if (!(flags & CISTPL_IO_16BIT))
134 return IO_DATA_PATH_WIDTH_8;
135 return IO_DATA_PATH_WIDTH_AUTO;
139 struct pcmcia_cfg_mem {
140 struct pcmcia_device *p_dev;
141 int (*conf_check) (struct pcmcia_device *p_dev, void *priv_data);
144 cistpl_cftable_entry_t dflt;
148 * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
150 * pcmcia_do_loop_config() is the internal callback for the call from
151 * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
152 * by a struct pcmcia_cfg_mem.
154 static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
156 struct pcmcia_cfg_mem *cfg_mem = priv;
157 struct pcmcia_device *p_dev = cfg_mem->p_dev;
158 cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
159 cistpl_cftable_entry_t *dflt = &cfg_mem->dflt;
160 unsigned int flags = p_dev->config_flags;
161 unsigned int vcc = p_dev->socket->socket.Vcc;
163 dev_dbg(&p_dev->dev, "testing configuration %x, autoconf %x\n",
167 cfg_mem->p_dev->config_index = cfg->index;
168 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
169 cfg_mem->dflt = *cfg;
171 /* check for matching Vcc? */
172 if (flags & CONF_AUTO_CHECK_VCC) {
173 if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
174 if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000)
176 } else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
177 if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000)
183 if (flags & CONF_AUTO_SET_VPP) {
184 if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
185 p_dev->vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
186 else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
188 dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;
192 if ((flags & CONF_AUTO_AUDIO) && (cfg->flags & CISTPL_CFTABLE_AUDIO))
193 p_dev->config_flags |= CONF_ENABLE_SPKR;
196 /* IO window settings? */
197 if (flags & CONF_AUTO_SET_IO) {
198 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
201 p_dev->resource[0]->start = p_dev->resource[0]->end = 0;
202 p_dev->resource[1]->start = p_dev->resource[1]->end = 0;
206 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
207 p_dev->resource[0]->flags |=
208 pcmcia_io_cfg_data_width(io->flags);
210 /* For multifunction cards, by convention, we
211 * configure the network function with window 0,
212 * and serial with window 1 */
213 i = (io->win[1].len > io->win[0].len);
214 p_dev->resource[1]->flags = p_dev->resource[0]->flags;
215 p_dev->resource[1]->start = io->win[1-i].base;
216 p_dev->resource[1]->end = io->win[1-i].len;
218 p_dev->resource[0]->start = io->win[i].base;
219 p_dev->resource[0]->end = io->win[i].len;
220 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
223 /* MEM window settings? */
224 if (flags & CONF_AUTO_SET_IOMEM) {
225 /* so far, we only set one memory window */
226 cistpl_mem_t *mem = (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
228 p_dev->resource[2]->start = p_dev->resource[2]->end = 0;
232 p_dev->resource[2]->start = mem->win[0].host_addr;
233 p_dev->resource[2]->end = mem->win[0].len;
234 if (p_dev->resource[2]->end < 0x1000)
235 p_dev->resource[2]->end = 0x1000;
236 p_dev->card_addr = mem->win[0].card_addr;
240 "checking configuration %x: %pr %pr %pr (%d lines)\n",
241 p_dev->config_index, p_dev->resource[0], p_dev->resource[1],
242 p_dev->resource[2], p_dev->io_lines);
244 return cfg_mem->conf_check(p_dev, cfg_mem->priv_data);
248 * pcmcia_loop_config() - loop over configuration options
249 * @p_dev: the struct pcmcia_device which we need to loop for.
250 * @conf_check: function to call for each configuration option.
251 * It gets passed the struct pcmcia_device and private data
252 * being passed to pcmcia_loop_config()
253 * @priv_data: private data to be passed to the conf_check function.
255 * pcmcia_loop_config() loops over all configuration options, and calls
256 * the driver-specific conf_check() for each one, checking whether
257 * it is a valid one. Returns 0 on success or errorcode otherwise.
259 int pcmcia_loop_config(struct pcmcia_device *p_dev,
260 int (*conf_check) (struct pcmcia_device *p_dev,
264 struct pcmcia_cfg_mem *cfg_mem;
267 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
271 cfg_mem->p_dev = p_dev;
272 cfg_mem->conf_check = conf_check;
273 cfg_mem->priv_data = priv_data;
275 ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
276 CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
277 cfg_mem, pcmcia_do_loop_config);
282 EXPORT_SYMBOL(pcmcia_loop_config);
285 struct pcmcia_loop_mem {
286 struct pcmcia_device *p_dev;
288 int (*loop_tuple) (struct pcmcia_device *p_dev,
294 * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
296 * pcmcia_do_loop_tuple() is the internal callback for the call from
297 * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
298 * by a struct pcmcia_cfg_mem.
300 static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
302 struct pcmcia_loop_mem *loop = priv;
304 return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
308 * pcmcia_loop_tuple() - loop over tuples in the CIS
309 * @p_dev: the struct pcmcia_device which we need to loop for.
310 * @code: which CIS code shall we look for?
311 * @priv_data: private data to be passed to the loop_tuple function.
312 * @loop_tuple: function to call for each CIS entry of type @function. IT
313 * gets passed the raw tuple and @priv_data.
315 * pcmcia_loop_tuple() loops over all CIS entries of type @function, and
316 * calls the @loop_tuple function for each entry. If the call to @loop_tuple
317 * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
319 int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
320 int (*loop_tuple) (struct pcmcia_device *p_dev,
325 struct pcmcia_loop_mem loop = {
327 .loop_tuple = loop_tuple,
328 .priv_data = priv_data};
330 return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
331 &loop, pcmcia_do_loop_tuple);
333 EXPORT_SYMBOL(pcmcia_loop_tuple);
336 struct pcmcia_loop_get {
342 * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
344 * pcmcia_do_get_tuple() is the internal callback for the call from
345 * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
346 * the first tuple, return 0 unconditionally. Create a memory buffer large
347 * enough to hold the content of the tuple, and fill it with the tuple data.
348 * The caller is responsible to free the buffer.
350 static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
353 struct pcmcia_loop_get *get = priv;
355 *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
357 get->len = tuple->TupleDataLen;
358 memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
360 dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n");
365 * pcmcia_get_tuple() - get first tuple from CIS
366 * @p_dev: the struct pcmcia_device which we need to loop for.
367 * @code: which CIS code shall we look for?
368 * @buf: pointer to store the buffer to.
370 * pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
371 * It returns the buffer length (or zero). The caller is responsible to free
372 * the buffer passed in @buf.
374 size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
377 struct pcmcia_loop_get get = {
383 pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
387 EXPORT_SYMBOL(pcmcia_get_tuple);
391 * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
393 * pcmcia_do_get_mac() is the internal callback for the call from
394 * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
395 * tuple contains a proper LAN_NODE_ID of length 6, and copy the data
396 * to struct net_device->dev_addr[i].
398 static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
401 struct net_device *dev = priv;
403 if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
405 if (tuple->TupleDataLen < ETH_ALEN + 2) {
406 dev_warn(&p_dev->dev, "Invalid CIS tuple length for "
411 if (tuple->TupleData[1] != ETH_ALEN) {
412 dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n");
415 eth_hw_addr_set(dev, &tuple->TupleData[2]);
420 * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
421 * @p_dev: the struct pcmcia_device for which we want the address.
422 * @dev: a properly prepared struct net_device to store the info to.
424 * pcmcia_get_mac_from_cis() reads out the hardware MAC address from
425 * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
426 * must be set up properly by the driver (see examples!).
428 int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
430 return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
432 EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
434 #endif /* CONFIG_NET */