Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 434 insertions, 0 deletions

diff --git a/drivers/pcmcia/pcmcia_cis.c b/drivers/pcmcia/pcmcia_cis.c
new file mode 100644
index 000000000..e4c4daf92
--- /dev/null
+++ b/drivers/pcmcia/pcmcia_cis.c
@@ -0,0 +1,434 @@
+// 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
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+#include <pcmcia/cisreg.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/ds.h>
+#include "cs_internal.h"
+
+
+/**
+ * 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, unsigned int 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.
+ */
+static int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int 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;
+	}
+
+	tuple.TupleData = buf;
+	tuple.TupleDataMax = 255;
+	tuple.TupleOffset = 0;
+	tuple.DesiredTuple = code;
+	tuple.Attributes = 0;
+
+	ret = pccard_get_first_tuple(s, function, &tuple);
+	while (!ret) {
+		if (pccard_get_tuple_data(s, &tuple))
+			goto next_entry;
+
+		if (parse)
+			if (pcmcia_parse_tuple(&tuple, parse))
+				goto next_entry;
+
+		ret = loop_tuple(&tuple, parse, priv_data);
+		if (!ret)
+			break;
+
+next_entry:
+		ret = pccard_get_next_tuple(s, function, &tuple);
+	}
+
+	kfree(buf);
+	return ret;
+}
+
+
+/**
+ * pcmcia_io_cfg_data_width() - convert cfgtable to data path width parameter
+ */
+static int pcmcia_io_cfg_data_width(unsigned int flags)
+{
+	if (!(flags & CISTPL_IO_8BIT))
+		return IO_DATA_PATH_WIDTH_16;
+	if (!(flags & CISTPL_IO_16BIT))
+		return IO_DATA_PATH_WIDTH_8;
+	return IO_DATA_PATH_WIDTH_AUTO;
+}
+
+
+struct pcmcia_cfg_mem {
+	struct pcmcia_device *p_dev;
+	int (*conf_check) (struct pcmcia_device *p_dev, void *priv_data);
+	void *priv_data;
+	cisparse_t parse;
+	cistpl_cftable_entry_t dflt;
+};
+
+/**
+ * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
+ *
+ * pcmcia_do_loop_config() is the internal callback for the call from
+ * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
+ * by a struct pcmcia_cfg_mem.
+ */
+static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
+{
+	struct pcmcia_cfg_mem *cfg_mem = priv;
+	struct pcmcia_device *p_dev = cfg_mem->p_dev;
+	cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
+	cistpl_cftable_entry_t *dflt = &cfg_mem->dflt;
+	unsigned int flags = p_dev->config_flags;
+	unsigned int vcc = p_dev->socket->socket.Vcc;
+
+	dev_dbg(&p_dev->dev, "testing configuration %x, autoconf %x\n",
+		cfg->index, flags);
+
+	/* default values */
+	cfg_mem->p_dev->config_index = cfg->index;
+	if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
+		cfg_mem->dflt = *cfg;
+
+	/* check for matching Vcc? */
+	if (flags & CONF_AUTO_CHECK_VCC) {
+		if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
+			if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000)
+				return -ENODEV;
+		} else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
+			if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000)
+				return -ENODEV;
+		}
+	}
+
+	/* set Vpp? */
+	if (flags & CONF_AUTO_SET_VPP) {
+		if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
+			p_dev->vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
+		else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
+			p_dev->vpp =
+				dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;
+	}
+
+	/* enable audio? */
+	if ((flags & CONF_AUTO_AUDIO) && (cfg->flags & CISTPL_CFTABLE_AUDIO))
+		p_dev->config_flags |= CONF_ENABLE_SPKR;
+
+
+	/* IO window settings? */
+	if (flags & CONF_AUTO_SET_IO) {
+		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
+		int i = 0;
+
+		p_dev->resource[0]->start = p_dev->resource[0]->end = 0;
+		p_dev->resource[1]->start = p_dev->resource[1]->end = 0;
+		if (io->nwin == 0)
+			return -ENODEV;
+
+		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;
+
+		p_dev->resource[2]->start = p_dev->resource[2]->end = 0;
+		if (mem->nwin == 0)
+			return -ENODEV;
+
+		p_dev->resource[2]->start = mem->win[0].host_addr;
+		p_dev->resource[2]->end = mem->win[0].len;
+		if (p_dev->resource[2]->end < 0x1000)
+			p_dev->resource[2]->end = 0x1000;
+		p_dev->card_addr = mem->win[0].card_addr;
+	}
+
+	dev_dbg(&p_dev->dev,
+		"checking configuration %x: %pr %pr %pr (%d lines)\n",
+		p_dev->config_index, p_dev->resource[0], p_dev->resource[1],
+		p_dev->resource[2], p_dev->io_lines);
+
+	return cfg_mem->conf_check(p_dev, cfg_mem->priv_data);
+}
+
+/**
+ * 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;
+
+	cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
+	if (cfg_mem == NULL)
+		return -ENOMEM;
+
+	cfg_mem->p_dev = p_dev;
+	cfg_mem->conf_check = conf_check;
+	cfg_mem->priv_data = priv_data;
+
+	ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
+				CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
+				cfg_mem, pcmcia_do_loop_config);
+
+	kfree(cfg_mem);
+	return ret;
+}
+EXPORT_SYMBOL(pcmcia_loop_config);
+
+
+struct pcmcia_loop_mem {
+	struct pcmcia_device *p_dev;
+	void *priv_data;
+	int (*loop_tuple) (struct pcmcia_device *p_dev,
+			   tuple_t *tuple,
+			   void *priv_data);
+};
+
+/**
+ * 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.
+ */
+static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
+{
+	struct pcmcia_loop_mem *loop = priv;
+
+	return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
+};
+
+/**
+ * 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};
+
+	return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
+				 &loop, pcmcia_do_loop_tuple);
+}
+EXPORT_SYMBOL(pcmcia_loop_tuple);
+
+
+struct pcmcia_loop_get {
+	size_t len;
+	cisdata_t **buf;
+};
+
+/**
+ * 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.
+ */
+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);
+