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authorDominik Brodowski <linux@dominikbrodowski.net>2009-10-19 01:32:33 +0400
committerDominik Brodowski <linux@dominikbrodowski.net>2009-11-08 20:06:54 +0300
commit91284224da5b15ec6c2b45e10fa5eccd1c92a204 (patch)
treee070902f5119b2eacf79d91cd36de98e3ae8423c /drivers/pcmcia/cistpl.c
parentaf757923a92e6e9dbfdb6b0264be14c564e1c466 (diff)
downloadlinux-91284224da5b15ec6c2b45e10fa5eccd1c92a204.tar.xz
pcmcia: add new CIS access helpers
As a replacement to pcmcia_get_{first,next}_tuple() and pcmcia_get_tuple_data(), three new -- and easier to use -- functions are added: - pcmcia_get_tuple() to get the very first CIS entry of one type. - pcmcia_loop_tuple() to loop over all CIS entries of one type. - pcmcia_get_mac_from_cis() to read out the hardware MAC address from CISTPL_FUNCE. Only a handful of drivers need these functions anyway, as most CIS access is already handled by pcmcia_loop_config(), which now shares the same backed (pccard_loop_tuple()) with pcmcia_loop_tuple(). A pcmcia_get_mac_from_cis() bug noted by Komuro <komurojun-mbn@nifty.com> has been fixed in this revision. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia/cistpl.c')
-rw-r--r--drivers/pcmcia/cistpl.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index 6c4a4fc83630..24dd3c1eac0b 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -1482,6 +1482,67 @@ done:
}
EXPORT_SYMBOL(pccard_read_tuple);
+
+/**
+ * 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;
+}
+EXPORT_SYMBOL(pccard_loop_tuple);
+
+
/*======================================================================
This tries to determine if a card has a sensible CIS. It returns