mac80211: switch to upstream owl-loader driver

The Owl Loader (named after the codename that Atheros gave
these devices back in the day) has been accepted upstream.

This patch removes the "misc" driver OpenWrt had and adds
the remaining differences against the version that ships
with 5.4-rc1 into a separate "120-owl-loader-compat.patch"
file that can be cut down once AR71XX is being dealt with.

Note: I decided to keep the existing (kmod-)owl-loader
package name around for now. The kernel module file in
the kmod package will be called ath9k_pci_owl_loader.ko
though.

Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/ath/120-owl-loader-compat.patch b/package/kernel/mac80211/patches/ath/120-owl-loader-compat.patch
new file mode 100644
index 0000000000..afd5e3eef0
--- /dev/null
+++ b/package/kernel/mac80211/patches/ath/120-owl-loader-compat.patch
@@ -0,0 +1,53 @@
+From: Christian Lamparter <chunkeey@gmail.com>
+Date: Sat, 16 Nov 2019 19:25:24 +0100
+Subject: [PATCH] owl_loader: compatibility patch
+
+This patch includes OpenWrt specific changes that are
+not included in the upstream owl-loader.
+
+This includes a platform data handling changes for ar71xx.
+
+Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
+
+--- a/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c
++++ b/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c
+@@ -104,6 +104,7 @@
+ {
+ 	struct pci_dev *pdev = (struct pci_dev *)context;
+ 	struct owl_ctx *ctx = (struct owl_ctx *)pci_get_drvdata(pdev);
++	struct ath9k_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ 	struct pci_bus *bus;
+ 
+ 	complete(&ctx->eeprom_load);
+@@ -121,6 +122,16 @@
+ 		goto release;
+ 	}
+ 
++	if (pdata) {
++		memcpy(pdata->eeprom_data, fw->data, fw->size);
++
++		/*
++		 * eeprom has been successfully loaded - pass the data to ath9k
++		 * but remove the eeprom_name, so it doesn't try to load it too.
++		 */
++		pdata->eeprom_name = NULL;
++	}
++
+ 	if (ath9k_pci_fixup(pdev, (const u16 *)fw->data, fw->size))
+ 		goto release;
+ 
+@@ -138,8 +149,14 @@
+ static const char *owl_get_eeprom_name(struct pci_dev *pdev)
+ {
+ 	struct device *dev = &pdev->dev;
++	struct ath9k_platform_data *pdata;
+ 	char *eeprom_name;
+ 
++	/* try the existing platform data first */
++	pdata = dev_get_platdata(dev);
++	if (pdata && pdata->eeprom_name)
++		return pdata->eeprom_name;
++
+ 	dev_dbg(dev, "using auto-generated eeprom filename\n");
+ 
+ 	eeprom_name = devm_kzalloc(dev, EEPROM_FILENAME_LEN, GFP_KERNEL);