439 lines
13 KiB
C
439 lines
13 KiB
C
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/*
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* PCMCIA high-level CIS access functions
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*
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* The initial developer of the original code is David A. Hinds
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* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
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*
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* Copyright (C) 1999 David A. Hinds
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* Copyright (C) 2004-2010 Dominik Brodowski
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <pcmcia/cisreg.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/ds.h>
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#include "cs_internal.h"
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/**
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* pccard_read_tuple() - internal CIS tuple access
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* @s: the struct pcmcia_socket where the card is inserted
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* @function: the device function we loop for
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* @code: which CIS code shall we look for?
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* @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
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*
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* pccard_read_tuple() reads out one tuple and attempts to parse it
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*/
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int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function,
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cisdata_t code, void *parse)
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{
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tuple_t tuple;
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cisdata_t *buf;
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int ret;
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buf = kmalloc(256, GFP_KERNEL);
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if (buf == NULL) {
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dev_warn(&s->dev, "no memory to read tuple\n");
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return -ENOMEM;
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}
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tuple.DesiredTuple = code;
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tuple.Attributes = 0;
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if (function == BIND_FN_ALL)
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tuple.Attributes = TUPLE_RETURN_COMMON;
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ret = pccard_get_first_tuple(s, function, &tuple);
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if (ret != 0)
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goto done;
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tuple.TupleData = buf;
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tuple.TupleOffset = 0;
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tuple.TupleDataMax = 255;
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ret = pccard_get_tuple_data(s, &tuple);
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if (ret != 0)
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goto done;
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ret = pcmcia_parse_tuple(&tuple, parse);
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done:
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kfree(buf);
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return ret;
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}
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/**
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* pccard_loop_tuple() - loop over tuples in the CIS
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* @s: the struct pcmcia_socket where the card is inserted
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* @function: the device function we loop for
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* @code: which CIS code shall we look for?
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* @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
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* @priv_data: private data to be passed to the loop_tuple function.
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* @loop_tuple: function to call for each CIS entry of type @function. IT
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* gets passed the raw tuple, the paresed tuple (if @parse is
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* set) and @priv_data.
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*
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* pccard_loop_tuple() loops over all CIS entries of type @function, and
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* calls the @loop_tuple function for each entry. If the call to @loop_tuple
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* returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
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*/
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int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
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cisdata_t code, cisparse_t *parse, void *priv_data,
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int (*loop_tuple) (tuple_t *tuple,
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cisparse_t *parse,
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void *priv_data))
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{
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tuple_t tuple;
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cisdata_t *buf;
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int ret;
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buf = kzalloc(256, GFP_KERNEL);
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if (buf == NULL) {
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dev_warn(&s->dev, "no memory to read tuple\n");
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return -ENOMEM;
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}
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tuple.TupleData = buf;
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tuple.TupleDataMax = 255;
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tuple.TupleOffset = 0;
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tuple.DesiredTuple = code;
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tuple.Attributes = 0;
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ret = pccard_get_first_tuple(s, function, &tuple);
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while (!ret) {
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if (pccard_get_tuple_data(s, &tuple))
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goto next_entry;
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if (parse)
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if (pcmcia_parse_tuple(&tuple, parse))
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goto next_entry;
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ret = loop_tuple(&tuple, parse, priv_data);
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if (!ret)
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break;
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next_entry:
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ret = pccard_get_next_tuple(s, function, &tuple);
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}
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kfree(buf);
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return ret;
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}
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/**
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* pcmcia_io_cfg_data_width() - convert cfgtable to data path width parameter
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*/
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static int pcmcia_io_cfg_data_width(unsigned int flags)
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{
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if (!(flags & CISTPL_IO_8BIT))
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return IO_DATA_PATH_WIDTH_16;
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if (!(flags & CISTPL_IO_16BIT))
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return IO_DATA_PATH_WIDTH_8;
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return IO_DATA_PATH_WIDTH_AUTO;
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}
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struct pcmcia_cfg_mem {
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struct pcmcia_device *p_dev;
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int (*conf_check) (struct pcmcia_device *p_dev, void *priv_data);
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void *priv_data;
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cisparse_t parse;
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cistpl_cftable_entry_t dflt;
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};
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/**
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* pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
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*
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* pcmcia_do_loop_config() is the internal callback for the call from
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* pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
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* by a struct pcmcia_cfg_mem.
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*/
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static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
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{
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struct pcmcia_cfg_mem *cfg_mem = priv;
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struct pcmcia_device *p_dev = cfg_mem->p_dev;
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cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
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cistpl_cftable_entry_t *dflt = &cfg_mem->dflt;
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unsigned int flags = p_dev->config_flags;
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unsigned int vcc = p_dev->socket->socket.Vcc;
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dev_dbg(&p_dev->dev, "testing configuration %x, autoconf %x\n",
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cfg->index, flags);
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/* default values */
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cfg_mem->p_dev->config_index = cfg->index;
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if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
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cfg_mem->dflt = *cfg;
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/* check for matching Vcc? */
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if (flags & CONF_AUTO_CHECK_VCC) {
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if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
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if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000)
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return -ENODEV;
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} else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
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if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000)
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return -ENODEV;
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}
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}
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/* set Vpp? */
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if (flags & CONF_AUTO_SET_VPP) {
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if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
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p_dev->vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
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else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
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p_dev->vpp =
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dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;
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}
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/* enable audio? */
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if ((flags & CONF_AUTO_AUDIO) && (cfg->flags & CISTPL_CFTABLE_AUDIO))
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p_dev->config_flags |= CONF_ENABLE_SPKR;
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/* IO window settings? */
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if (flags & CONF_AUTO_SET_IO) {
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cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
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int i = 0;
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p_dev->resource[0]->start = p_dev->resource[0]->end = 0;
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p_dev->resource[1]->start = p_dev->resource[1]->end = 0;
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if (io->nwin == 0)
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return -ENODEV;
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p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
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p_dev->resource[0]->flags |=
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pcmcia_io_cfg_data_width(io->flags);
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if (io->nwin > 1) {
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/* For multifunction cards, by convention, we
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* configure the network function with window 0,
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* and serial with window 1 */
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i = (io->win[1].len > io->win[0].len);
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p_dev->resource[1]->flags = p_dev->resource[0]->flags;
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p_dev->resource[1]->start = io->win[1-i].base;
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p_dev->resource[1]->end = io->win[1-i].len;
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}
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p_dev->resource[0]->start = io->win[i].base;
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p_dev->resource[0]->end = io->win[i].len;
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p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
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}
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/* MEM window settings? */
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if (flags & CONF_AUTO_SET_IOMEM) {
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/* so far, we only set one memory window */
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cistpl_mem_t *mem = (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
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p_dev->resource[2]->start = p_dev->resource[2]->end = 0;
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if (mem->nwin == 0)
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return -ENODEV;
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p_dev->resource[2]->start = mem->win[0].host_addr;
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p_dev->resource[2]->end = mem->win[0].len;
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if (p_dev->resource[2]->end < 0x1000)
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p_dev->resource[2]->end = 0x1000;
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p_dev->card_addr = mem->win[0].card_addr;
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}
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dev_dbg(&p_dev->dev,
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"checking configuration %x: %pr %pr %pr (%d lines)\n",
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p_dev->config_index, p_dev->resource[0], p_dev->resource[1],
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p_dev->resource[2], p_dev->io_lines);
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return cfg_mem->conf_check(p_dev, cfg_mem->priv_data);
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}
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/**
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* pcmcia_loop_config() - loop over configuration options
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* @p_dev: the struct pcmcia_device which we need to loop for.
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* @conf_check: function to call for each configuration option.
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* It gets passed the struct pcmcia_device and private data
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* being passed to pcmcia_loop_config()
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* @priv_data: private data to be passed to the conf_check function.
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*
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* pcmcia_loop_config() loops over all configuration options, and calls
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* the driver-specific conf_check() for each one, checking whether
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* it is a valid one. Returns 0 on success or errorcode otherwise.
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*/
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int pcmcia_loop_config(struct pcmcia_device *p_dev,
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int (*conf_check) (struct pcmcia_device *p_dev,
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void *priv_data),
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void *priv_data)
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{
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struct pcmcia_cfg_mem *cfg_mem;
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int ret;
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cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
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if (cfg_mem == NULL)
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return -ENOMEM;
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cfg_mem->p_dev = p_dev;
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cfg_mem->conf_check = conf_check;
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cfg_mem->priv_data = priv_data;
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ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
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CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
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cfg_mem, pcmcia_do_loop_config);
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kfree(cfg_mem);
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return ret;
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}
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EXPORT_SYMBOL(pcmcia_loop_config);
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struct pcmcia_loop_mem {
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struct pcmcia_device *p_dev;
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void *priv_data;
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int (*loop_tuple) (struct pcmcia_device *p_dev,
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tuple_t *tuple,
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void *priv_data);
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};
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/**
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* pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
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*
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* pcmcia_do_loop_tuple() is the internal callback for the call from
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* pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
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* by a struct pcmcia_cfg_mem.
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*/
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static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
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{
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struct pcmcia_loop_mem *loop = priv;
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return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
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};
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/**
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* pcmcia_loop_tuple() - loop over tuples in the CIS
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* @p_dev: the struct pcmcia_device which we need to loop for.
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* @code: which CIS code shall we look for?
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||
|
|
* @priv_data: private data to be passed to the loop_tuple function.
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|
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* @loop_tuple: function to call for each CIS entry of type @function. IT
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* gets passed the raw tuple and @priv_data.
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*
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* pcmcia_loop_tuple() loops over all CIS entries of type @function, and
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* calls the @loop_tuple function for each entry. If the call to @loop_tuple
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* returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
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*/
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int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
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int (*loop_tuple) (struct pcmcia_device *p_dev,
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tuple_t *tuple,
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void *priv_data),
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void *priv_data)
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{
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struct pcmcia_loop_mem loop = {
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.p_dev = p_dev,
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.loop_tuple = loop_tuple,
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.priv_data = priv_data};
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return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
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&loop, pcmcia_do_loop_tuple);
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}
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EXPORT_SYMBOL(pcmcia_loop_tuple);
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struct pcmcia_loop_get {
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size_t len;
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cisdata_t **buf;
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};
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/**
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* pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
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*
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* pcmcia_do_get_tuple() is the internal callback for the call from
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* 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.
|
||
|
|
*/
|
||
|
|
static int 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,
|
||
|
|
unsigned char **buf)
|
||
|
|
{
|
||
|
|
struct pcmcia_loop_get get = {
|
||
|
|
.len = 0,
|
||
|
|
.buf = buf,
|
||
|
|
};
|
||
|
|
|
||
|
|
*get.buf = NULL;
|
||
|
|
pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
|
||
|
|
|
||
|
|
return get.len;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(pcmcia_get_tuple);
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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].
|
||
|
|
*/
|
||
|
|
static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
|
||
|
|
void *priv)
|
||
|
|
{
|
||
|
|
struct net_device *dev = priv;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
for (i = 0; i < 6; i++)
|
||
|
|
dev->dev_addr[i] = tuple->TupleData[i+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);
|
||
|
|
|