pcmcia: move high level CIS access code to separate file

No code changes.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 355 insertions, 0 deletions

diff --git a/drivers/pcmcia/pcmcia_cis.c b/drivers/pcmcia/pcmcia_cis.c
new file mode 100644
index 000000000000..7406387f1f5e
--- /dev/null
+++ b/drivers/pcmcia/pcmcia_cis.c
@@ -0,0 +1,355 @@
+/*
+ * 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) 2004-2009   Dominik Brodowski
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/cs.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_printk(KERN_WARNING, &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.
+ */
+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_printk(KERN_WARNING, &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;
+}
+
+struct pcmcia_cfg_mem {
+        struct pcmcia_device *p_dev;
+        void *priv_data;
+        int (*conf_check) (struct pcmcia_device *p_dev,
+                           cistpl_cftable_entry_t *cfg,
+                           cistpl_cftable_entry_t *dflt,
+                           unsigned int vcc,
+                           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)
+{
+        cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
+        struct pcmcia_cfg_mem *cfg_mem = priv;
+
+        /* default values */
+        cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
+        if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
+                cfg_mem->dflt = *cfg;
+
+        return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
+                                   cfg_mem->p_dev->socket->socket.Vcc,
+                                   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, the CIS data
+ *              describing the configuration option, 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,
+                                                 cistpl_cftable_entry_t *cfg,
+                                                 cistpl_cftable_entry_t *dflt,
+                                                 unsigned int vcc,
+                                                 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);
+