[PATCH 12/14] pcmcia: request CIS via firmware interface

[Dominik Brodowski]

Use the firmware method to load replacement CIS tables. It is recommended
that the /lib/firmware/cis/ points to /etc/pcmcia/cis or the other way round
so that both old-style cardmgr and new-style hotplug/firmware can access
these "overwrite" files

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

Index: 2.6.11-rc5/drivers/pcmcia/ds.c
===================================================================
--- 2.6.11-rc5.orig/drivers/pcmcia/ds.c	2005-02-27 08:42:43.000000000 +0100
+++ 2.6.11-rc5/drivers/pcmcia/ds.c	2005-02-27 08:51:28.000000000 +0100
@@ -36,6 +36,7 @@
 #include <linux/kref.h>
 #include <linux/workqueue.h>
 #include <linux/crc32.h>
+#include <linux/firmware.h>
 
 #include <asm/atomic.h>
 
@@ -295,6 +296,47 @@
 }
 #endif
 
+
+static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
+{
+	struct pcmcia_socket *s = dev->socket;
+	const struct firmware *fw;
+	char path[20];
+	int ret=-ENOMEM;
+        cisdump_t *cis;
+
+	if (!filename)
+		return -EINVAL;
+
+	ds_dbg(1, "trying to load firmware %s\n", filename);
+
+	if (strlen(filename) > 14)
+		return -EINVAL;
+
+	snprintf(path, 20, "cis/%s", filename);
+
+	if(request_firmware(&fw, path, &dev->dev) == 0) {
+		if (fw->size >= CISTPL_MAX_CIS_SIZE)
+			goto release;
+
+		cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
+		if (!cis)
+			goto release;
+
+		memset(cis, 0, sizeof(cisdump_t));
+
+		cis->Length = fw->size + 1;
+		memcpy(cis->Data, fw->data, fw->size);
+
+		if (!pcmcia_replace_cis(s, cis))
+			ret = 0;
+	}
+ release:
+	release_firmware(fw);
+
+	return (ret);
+}
+
 /*======================================================================*/
 
 static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info);
@@ -739,11 +781,11 @@
 	}
 
 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
-		if (!dev->socket->fake_cis) {
-			/* FIXME: evaluate using firmware helpers to
-			 * automagically load it from userspace */
+		if (!dev->socket->fake_cis)
+			pcmcia_load_firmware(dev, did->cisfile);
+
+		if (!dev->socket->fake_cis)
 			return 0;
-		}
 	}
 
 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMUS) {