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114 lines
3.2 KiB
Diff
114 lines
3.2 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/ralink/rt2x00/Kconfig | 1 +
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drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c | 65 +++++++++++++++++++++++
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2 files changed, 66 insertions(+)
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--- a/drivers/net/wireless/ralink/rt2x00/Kconfig
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+++ b/drivers/net/wireless/ralink/rt2x00/Kconfig
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@@ -220,6 +220,7 @@ config RT2800SOC
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select RT2X00_LIB_EEPROM
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select RT2800_LIB
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select RT2800_LIB_MMIO
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+ select MTD if SOC_RT288X || SOC_RT305X
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help
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This adds support for Ralink WiSoC devices.
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Supported chips: RT2880, RT3050, RT3052, RT3350, RT3352.
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--- a/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
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@@ -26,11 +26,76 @@
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#include <linux/kernel.h>
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#include <linux/module.h>
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+#if IS_ENABLED(CONFIG_MTD)
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/partitions.h>
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+#endif
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#include <linux/of.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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+#if IS_ENABLED(CONFIG_MTD)
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+static int rt2800lib_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
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+{
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+ int ret = -EINVAL;
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+#ifdef CONFIG_OF
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+ static struct firmware mtd_fw;
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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 i, 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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+ return -ENOENT;
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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 ((retlen != rt2x00dev->ops->eeprom_size) || ret) {
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+ dev_err(rt2x00dev->dev, "failed to load eeprom from device \"%s\"\n", part);
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+ return ret;
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+ }
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+
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+ if (of_find_property(np, "ralink,mtd-eeprom-swap", NULL))
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+ for (i = 0; i < len/sizeof(u16); i++)
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+ rt2x00dev->eeprom[i] = swab16(rt2x00dev->eeprom[i]);
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+
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+ rt2x00dev->eeprom_file = &mtd_fw;
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+ mtd_fw.data = (const u8 *) rt2x00dev->eeprom;
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+
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+ dev_info(rt2x00dev->dev, "loaded eeprom from mtd device \"%s\"\n", part);
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+#endif
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+
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+ return ret;
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+}
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+#endif
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+
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static const char *
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rt2x00lib_get_eeprom_file_name(struct rt2x00_dev *rt2x00dev)
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{
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@@ -58,6 +123,11 @@ static int rt2x00lib_request_eeprom_file
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const char *ee_name;
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int retval;
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+#if IS_ENABLED(CONFIG_MTD)
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+ if (!rt2800lib_read_eeprom_mtd(rt2x00dev))
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+ return 0;
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+#endif
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+
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ee_name = rt2x00lib_get_eeprom_file_name(rt2x00dev);
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if (!ee_name && test_bit(REQUIRE_EEPROM_FILE, &rt2x00dev->cap_flags)) {
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rt2x00_err(rt2x00dev, "Required EEPROM name is missing.");
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