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434 lines
13 KiB
434 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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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* <[email protected]>. 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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#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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static 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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* @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 |
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* the first tuple, return 0 unconditionally. Create a memory buffer large |
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* enough to hold the content of the tuple, and fill it with the tuple data. |
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* The caller is responsible to free the buffer. |
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*/ |
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static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple, |
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void *priv) |
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{ |
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struct pcmcia_loop_get *get = priv; |
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*get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL); |
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if (*get->buf) { |
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get->len = tuple->TupleDataLen; |
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memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen); |
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} else |
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dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n"); |
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return 0; |
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} |
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/** |
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* pcmcia_get_tuple() - get first tuple from 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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* @buf: pointer to store the buffer to. |
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* |
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* pcmcia_get_tuple() gets the content of the first CIS entry of type @code. |
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* It returns the buffer length (or zero). The caller is responsible to free |
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* the buffer passed in @buf. |
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*/ |
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size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code, |
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unsigned char **buf) |
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{ |
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struct pcmcia_loop_get get = { |
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.len = 0, |
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.buf = buf, |
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}; |
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*get.buf = NULL; |
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pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get); |
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return get.len; |
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} |
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EXPORT_SYMBOL(pcmcia_get_tuple); |
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/* |
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* pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis() |
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* |
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* pcmcia_do_get_mac() is the internal callback for the call from |
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* pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the |
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* tuple contains a proper LAN_NODE_ID of length 6, and copy the data |
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* to struct net_device->dev_addr[i]. |
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*/ |
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static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple, |
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void *priv) |
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{ |
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struct net_device *dev = priv; |
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int i; |
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if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID) |
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return -EINVAL; |
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if (tuple->TupleDataLen < ETH_ALEN + 2) { |
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dev_warn(&p_dev->dev, "Invalid CIS tuple length for " |
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"LAN_NODE_ID\n"); |
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return -EINVAL; |
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} |
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if (tuple->TupleData[1] != ETH_ALEN) { |
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dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n"); |
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return -EINVAL; |
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} |
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for (i = 0; i < 6; i++) |
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dev->dev_addr[i] = tuple->TupleData[i+2]; |
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return 0; |
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} |
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/** |
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* pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE |
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* @p_dev: the struct pcmcia_device for which we want the address. |
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* @dev: a properly prepared struct net_device to store the info to. |
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* |
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* pcmcia_get_mac_from_cis() reads out the hardware MAC address from |
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* CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which |
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* must be set up properly by the driver (see examples!). |
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*/ |
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int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev) |
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{ |
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return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev); |
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} |
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EXPORT_SYMBOL(pcmcia_get_mac_from_cis); |
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