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- From 339fe73f340161a624cc08e738d2244814852c3e Mon Sep 17 00:00:00 2001
- From: John Crispin <blogic@openwrt.org>
- Date: Sun, 17 Mar 2013 00:55:04 +0100
- Subject: [PATCH] rt2x00: load eeprom on SoC from a mtd device defines inside
- OF
- Signed-off-by: John Crispin <blogic@openwrt.org>
- ---
- drivers/net/wireless/ralink/rt2x00/Kconfig | 1 +
- drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c | 65 +++++++++++++++++++++++
- 2 files changed, 66 insertions(+)
- --- a/drivers/net/wireless/ralink/rt2x00/Kconfig
- +++ b/drivers/net/wireless/ralink/rt2x00/Kconfig
- @@ -220,6 +220,7 @@ config RT2800SOC
- select RT2X00_LIB_EEPROM
- select RT2800_LIB
- select RT2800_LIB_MMIO
- + select MTD if SOC_RT288X || SOC_RT305X
- help
- This adds support for Ralink WiSoC devices.
- Supported chips: RT2880, RT3050, RT3052, RT3350, RT3352.
- --- a/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
- +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
- @@ -26,11 +26,76 @@
-
- #include <linux/kernel.h>
- #include <linux/module.h>
- +#if IS_ENABLED(CONFIG_MTD)
- +#include <linux/mtd/mtd.h>
- +#include <linux/mtd/partitions.h>
- +#endif
- #include <linux/of.h>
-
- #include "rt2x00.h"
- #include "rt2x00lib.h"
-
- +#if IS_ENABLED(CONFIG_MTD)
- +static int rt2800lib_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
- +{
- + int ret = -EINVAL;
- +#ifdef CONFIG_OF
- + static struct firmware mtd_fw;
- + struct device_node *np = rt2x00dev->dev->of_node, *mtd_np = NULL;
- + size_t retlen, len = rt2x00dev->ops->eeprom_size;
- + int i, size, offset = 0;
- + struct mtd_info *mtd;
- + const char *part;
- + const __be32 *list;
- + phandle phandle;
- +
- + list = of_get_property(np, "ralink,mtd-eeprom", &size);
- + if (!list)
- + return -ENOENT;
- +
- + phandle = be32_to_cpup(list++);
- + if (phandle)
- + mtd_np = of_find_node_by_phandle(phandle);
- + if (!mtd_np) {
- + dev_err(rt2x00dev->dev, "failed to load mtd phandle\n");
- + return -EINVAL;
- + }
- +
- + part = of_get_property(mtd_np, "label", NULL);
- + if (!part)
- + part = mtd_np->name;
- +
- + mtd = get_mtd_device_nm(part);
- + if (IS_ERR(mtd)) {
- + dev_err(rt2x00dev->dev, "failed to get mtd device \"%s\"\n", part);
- + return PTR_ERR(mtd);
- + }
- +
- + if (size > sizeof(*list))
- + offset = be32_to_cpup(list);
- +
- + ret = mtd_read(mtd, offset, len, &retlen, (u_char *) rt2x00dev->eeprom);
- + put_mtd_device(mtd);
- +
- + if ((retlen != rt2x00dev->ops->eeprom_size) || ret) {
- + dev_err(rt2x00dev->dev, "failed to load eeprom from device \"%s\"\n", part);
- + return ret;
- + }
- +
- + if (of_find_property(np, "ralink,mtd-eeprom-swap", NULL))
- + for (i = 0; i < len/sizeof(u16); i++)
- + rt2x00dev->eeprom[i] = swab16(rt2x00dev->eeprom[i]);
- +
- + rt2x00dev->eeprom_file = &mtd_fw;
- + mtd_fw.data = (const u8 *) rt2x00dev->eeprom;
- +
- + dev_info(rt2x00dev->dev, "loaded eeprom from mtd device \"%s\"\n", part);
- +#endif
- +
- + return ret;
- +}
- +#endif
- +
- static const char *
- rt2x00lib_get_eeprom_file_name(struct rt2x00_dev *rt2x00dev)
- {
- @@ -58,6 +123,11 @@ static int rt2x00lib_request_eeprom_file
- const char *ee_name;
- int retval;
-
- +#if IS_ENABLED(CONFIG_MTD)
- + if (!rt2800lib_read_eeprom_mtd(rt2x00dev))
- + return 0;
- +#endif
- +
- ee_name = rt2x00lib_get_eeprom_file_name(rt2x00dev);
- if (!ee_name && test_bit(REQUIRE_EEPROM_FILE, &rt2x00dev->cap_flags)) {
- rt2x00_err(rt2x00dev, "Required EEPROM name is missing.");
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