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103 lines
2.7 KiB
Diff
103 lines
2.7 KiB
Diff
From 339fe73f340161a624cc08e738d2244814852c3e Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Sun, 17 Mar 2013 00:55:04 +0100
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Subject: [PATCH] rt2x00: load eeprom on SoC from a mtd device defines inside
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OF
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Signed-off-by: John Crispin <blogic@openwrt.org>
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---
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drivers/net/wireless/rt2x00/Kconfig | 1 +
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drivers/net/wireless/rt2x00/rt2800pci.c | 44 ++++++++++++++++++++++++++-----
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2 files changed, 39 insertions(+), 6 deletions(-)
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--- a/drivers/net/wireless/rt2x00/Kconfig
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+++ b/drivers/net/wireless/rt2x00/Kconfig
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@@ -68,6 +68,7 @@ config RT2800PCI
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select RT2X00_LIB_CRYPTO
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select CRC_CCITT
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select EEPROM_93CX6
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+ select MTD if SOC_RT288X || SOC_RT305X
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---help---
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This adds support for rt27xx/rt28xx/rt30xx wireless chipset family.
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Supported chips: RT2760, RT2790, RT2860, RT2880, RT2890, RT3052,
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--- a/drivers/net/wireless/rt2x00/rt2x00eeprom.c
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+++ b/drivers/net/wireless/rt2x00/rt2x00eeprom.c
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@@ -30,12 +30,77 @@
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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+#ifdef CONFIG_OF
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+#include <linux/of.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/partitions.h>
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+
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+static struct firmware mtd_fw;
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+
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+static int rt2800pci_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
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+{
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+ struct device_node *np = rt2x00dev->dev->of_node, *mtd_np = NULL;
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+ size_t retlen, len = rt2x00dev->ops->eeprom_size;
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+ int ret, size, offset = 0;
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+ struct mtd_info *mtd;
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+ const char *part;
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+ const __be32 *list;
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+ phandle phandle;
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+
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+ list = of_get_property(np, "ralink,mtd-eeprom", &size);
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+ if (!list) {
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+ dev_err(rt2x00dev->dev, "failed to load eeprom property\n");
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+ return -ENOENT;
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+ }
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+
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+ phandle = be32_to_cpup(list++);
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+ if (phandle)
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+ mtd_np = of_find_node_by_phandle(phandle);
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+ if (!mtd_np) {
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+ dev_err(rt2x00dev->dev, "failed to load mtd phandle\n");
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+ return -EINVAL;
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+ }
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+
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+ part = of_get_property(mtd_np, "label", NULL);
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+ if (!part)
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+ part = mtd_np->name;
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+
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+ mtd = get_mtd_device_nm(part);
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+ if (IS_ERR(mtd)) {
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+ dev_err(rt2x00dev->dev, "failed to get mtd device \"%s\"\n", part);
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+ return PTR_ERR(mtd);
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+ }
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+
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+ if (size > sizeof(*list))
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+ offset = be32_to_cpup(list);
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+
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+ ret = mtd_read(mtd, offset, len, &retlen, (u_char *) rt2x00dev->eeprom);
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+ put_mtd_device(mtd);
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+
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+ if (!ret) {
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+ rt2x00dev->eeprom_file = &mtd_fw;
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+ mtd_fw.size = len;
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+ mtd_fw.data = rt2x00dev->eeprom;
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+ }
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+
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+ return ret;
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+}
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+#else
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+static inline int rt2800pci_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
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+{
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+ return -EINVAL;
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+}
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+#endif
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+
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static int rt2x00lib_request_eeprom_file(struct rt2x00_dev *rt2x00dev)
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{
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const struct firmware *ee;
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char *ee_name;
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int retval;
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+ if (!rt2800pci_read_eeprom_mtd(rt2x00dev))
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+ return 0;
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+
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ee_name = rt2x00dev->ops->lib->get_eeprom_file_name(rt2x00dev);
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if (!ee_name) {
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ERROR(rt2x00dev,
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