// SPDX-License-Identifier: GPL-2.0-only /* * PCMCIA high-level CIS access functions * * The initial developer of the original code is David A. Hinds * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. * * Copyright (C) 1999 David A. Hinds * Copyright (C) 2004-2010 Dominik Brodowski
*/
/** * pccard_read_tuple() - internal CIS tuple access * @s: the struct pcmcia_socket where the card is inserted * @function: the device function we loop for * @code: which CIS code shall we look for? * @parse: buffer where the tuple shall be parsed (or NULL, if no parse) * * pccard_read_tuple() reads out one tuple and attempts to parse it
*/ int pccard_read_tuple(struct pcmcia_socket *s, unsignedint function,
cisdata_t code, void *parse)
{
tuple_t tuple;
cisdata_t *buf; int ret;
buf = kmalloc(256, GFP_KERNEL); if (buf == NULL) {
dev_warn(&s->dev, "no memory to read tuple\n"); return -ENOMEM;
}
tuple.DesiredTuple = code;
tuple.Attributes = 0; if (function == BIND_FN_ALL)
tuple.Attributes = TUPLE_RETURN_COMMON;
ret = pccard_get_first_tuple(s, function, &tuple); if (ret != 0) goto done;
tuple.TupleData = buf;
tuple.TupleOffset = 0;
tuple.TupleDataMax = 255;
ret = pccard_get_tuple_data(s, &tuple); if (ret != 0) goto done;
ret = pcmcia_parse_tuple(&tuple, parse);
done:
kfree(buf); return ret;
}
/** * pccard_loop_tuple() - loop over tuples in the CIS * @s: the struct pcmcia_socket where the card is inserted * @function: the device function we loop for * @code: which CIS code shall we look for? * @parse: buffer where the tuple shall be parsed (or NULL, if no parse) * @priv_data: private data to be passed to the loop_tuple function. * @loop_tuple: function to call for each CIS entry of type @function. IT * gets passed the raw tuple, the paresed tuple (if @parse is * set) and @priv_data. * * pccard_loop_tuple() loops over all CIS entries of type @function, and * calls the @loop_tuple function for each entry. If the call to @loop_tuple * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
*/ staticint pccard_loop_tuple(struct pcmcia_socket *s, unsignedint function,
cisdata_t code, cisparse_t *parse, void *priv_data, int (*loop_tuple) (tuple_t *tuple,
cisparse_t *parse, void *priv_data))
{
tuple_t tuple;
cisdata_t *buf; int ret;
buf = kzalloc(256, GFP_KERNEL); if (buf == NULL) {
dev_warn(&s->dev, "no memory to read tuple\n"); return -ENOMEM;
}
p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
p_dev->resource[0]->flags |=
pcmcia_io_cfg_data_width(io->flags); if (io->nwin > 1) { /* For multifunction cards, by convention, we * configure the network function with window 0,
* and serial with window 1 */
i = (io->win[1].len > io->win[0].len);
p_dev->resource[1]->flags = p_dev->resource[0]->flags;
p_dev->resource[1]->start = io->win[1-i].base;
p_dev->resource[1]->end = io->win[1-i].len;
}
p_dev->resource[0]->start = io->win[i].base;
p_dev->resource[0]->end = io->win[i].len;
p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
}
/* MEM window settings? */ if (flags & CONF_AUTO_SET_IOMEM) { /* so far, we only set one memory window */
cistpl_mem_t *mem = (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
/** * pcmcia_loop_config() - loop over configuration options * @p_dev: the struct pcmcia_device which we need to loop for. * @conf_check: function to call for each configuration option. * It gets passed the struct pcmcia_device and private data * being passed to pcmcia_loop_config() * @priv_data: private data to be passed to the conf_check function. * * pcmcia_loop_config() loops over all configuration options, and calls * the driver-specific conf_check() for each one, checking whether * it is a valid one. Returns 0 on success or errorcode otherwise.
*/ int pcmcia_loop_config(struct pcmcia_device *p_dev, int (*conf_check) (struct pcmcia_device *p_dev, void *priv_data), void *priv_data)
{ struct pcmcia_cfg_mem *cfg_mem; int ret;
/* * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config() * * pcmcia_do_loop_tuple() is the internal callback for the call from * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred * by a struct pcmcia_cfg_mem.
*/ staticint pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
{ struct pcmcia_loop_mem *loop = priv;
/** * pcmcia_loop_tuple() - loop over tuples in the CIS * @p_dev: the struct pcmcia_device which we need to loop for. * @code: which CIS code shall we look for? * @priv_data: private data to be passed to the loop_tuple function. * @loop_tuple: function to call for each CIS entry of type @function. IT * gets passed the raw tuple and @priv_data. * * pcmcia_loop_tuple() loops over all CIS entries of type @function, and * calls the @loop_tuple function for each entry. If the call to @loop_tuple * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
*/ int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code, int (*loop_tuple) (struct pcmcia_device *p_dev,
tuple_t *tuple, void *priv_data), void *priv_data)
{ struct pcmcia_loop_mem loop = {
.p_dev = p_dev,
.loop_tuple = loop_tuple,
.priv_data = priv_data};
/* * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple() * * pcmcia_do_get_tuple() is the internal callback for the call from * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in * the first tuple, return 0 unconditionally. Create a memory buffer large * enough to hold the content of the tuple, and fill it with the tuple data. * The caller is responsible to free the buffer.
*/ staticint pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple, void *priv)
{ struct pcmcia_loop_get *get = priv;
*get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL); if (*get->buf) {
get->len = tuple->TupleDataLen;
memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
} else
dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n"); return 0;
}
/** * pcmcia_get_tuple() - get first tuple from CIS * @p_dev: the struct pcmcia_device which we need to loop for. * @code: which CIS code shall we look for? * @buf: pointer to store the buffer to. * * pcmcia_get_tuple() gets the content of the first CIS entry of type @code. * It returns the buffer length (or zero). The caller is responsible to free * the buffer passed in @buf.
*/
size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code, unsignedchar **buf)
{ struct pcmcia_loop_get get = {
.len = 0,
.buf = buf,
};
#ifdef CONFIG_NET /* * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis() * * pcmcia_do_get_mac() is the internal callback for the call from * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the * tuple contains a proper LAN_NODE_ID of length 6, and copy the data * to struct net_device->dev_addr[i].
*/ staticint pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple, void *priv)
{ struct net_device *dev = priv;
if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID) return -EINVAL; if (tuple->TupleDataLen < ETH_ALEN + 2) {
dev_warn(&p_dev->dev, "Invalid CIS tuple length for " "LAN_NODE_ID\n"); return -EINVAL;
}
if (tuple->TupleData[1] != ETH_ALEN) {
dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n"); return -EINVAL;
}
eth_hw_addr_set(dev, &tuple->TupleData[2]); return 0;
}
/** * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE * @p_dev: the struct pcmcia_device for which we want the address. * @dev: a properly prepared struct net_device to store the info to. * * pcmcia_get_mac_from_cis() reads out the hardware MAC address from * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which * must be set up properly by the driver (see examples!).
*/ int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
{ return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
}
EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
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