From 55768fa6d9462c18c1ce3c862db3bf55bac3b1c7 Mon Sep 17 00:00:00 2001
From: Andres Salomon <dilinger@queued.net>
Date: Thu, 8 Sep 2011 17:35:17 -0700
Subject: [PATCH] libertas: prioritize usb8388_olpc.bin firmware on OLPC
machines
Normally, the v9 firmware will be loaded if it's available. However, on
OLPC XO-1 machines, the olpc-specific firmware supports extra functionality.
This makes the libertas driver attempt to load the custom firmware first
if the machine is an OLPC machine; if that fails (or it's not an OLPC
machine), fall back to attempting to load the other firmwares.
usb8388_olpc.bin is currently found in the linux-firmware repository.
Signed-off-by: Andres Salomon <dilinger@queued.net>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/libertas/if_usb.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 0c846f5a646ab..8147f1e2a0b0d 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -973,6 +973,23 @@ static const struct {
{ MODEL_8682, "libertas/usb8682.bin" }
};
+#ifdef CONFIG_OLPC
+
+static int try_olpc_fw(struct if_usb_card *cardp)
+{
+ int retval = -ENOENT;
+
+ /* try the OLPC firmware first; fall back to fw_table list */
+ if (machine_is_olpc() && cardp->model == MODEL_8388)
+ retval = request_firmware(&cardp->fw,
+ "libertas/usb8388_olpc.bin", &cardp->udev->dev);
+ return retval;
+}
+
+#else
+static int try_olpc_fw(struct if_usb_card *cardp) { return -ENOENT; }
+#endif /* !CONFIG_OLPC */
+
static int get_fw(struct if_usb_card *cardp, const char *fwname)
{
int i;
@@ -981,6 +998,10 @@ static int get_fw(struct if_usb_card *cardp, const char *fwname)
if (fwname)
return request_firmware(&cardp->fw, fwname, &cardp->udev->dev);
+ /* Handle OLPC firmware */
+ if (try_olpc_fw(cardp) == 0)
+ return 0;
+
/* Otherwise search for firmware to use */
for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
if (fw_table[i].model != cardp->model)
--
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