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From 1046fc9e98936991aeb0b0656c84833d96a63c0f Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Sun, 15 Oct 2023 14:22:49 +0200
Subject: [PATCH 1/5] wifi: rt2x00: Add support for loading EEPROM from
userspace
Add support for loading EEPROM from userspace.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/net/wireless/ralink/rt2x00/Kconfig | 5 ++
drivers/net/wireless/ralink/rt2x00/Makefile | 1 +
.../net/wireless/ralink/rt2x00/rt2800soc.c | 15 +---
drivers/net/wireless/ralink/rt2x00/rt2x00.h | 1 +
.../net/wireless/ralink/rt2x00/rt2x00dev.c | 9 +++
.../net/wireless/ralink/rt2x00/rt2x00eeprom.c | 75 +++++++++++++++++++
.../net/wireless/ralink/rt2x00/rt2x00soc.c | 1 +
.../net/wireless/ralink/rt2x00/rt2x00soc.h | 9 +++
8 files changed, 102 insertions(+), 14 deletions(-)
create mode 100644 drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
--- a/local-symbols
+++ b/local-symbols
@@ -352,6 +352,7 @@ RT2X00_LIB_FIRMWARE=
RT2X00_LIB_CRYPTO=
RT2X00_LIB_LEDS=
RT2X00_LIB_DEBUGFS=
+RT2X00_LIB_EEPROM=
RT2X00_DEBUG=
WLAN_VENDOR_REALTEK=
RTL8180=
--- a/drivers/net/wireless/ralink/rt2x00/Kconfig
+++ b/drivers/net/wireless/ralink/rt2x00/Kconfig
@@ -70,6 +70,7 @@ config RT2800PCI
select RT2X00_LIB_MMIO
select RT2X00_LIB_PCI
select RT2X00_LIB_FIRMWARE
+ select RT2X00_LIB_EEPROM
select RT2X00_LIB_CRYPTO
depends on CRC_CCITT
depends on EEPROM_93CX6
@@ -216,6 +217,7 @@ config RT2800SOC
select RT2X00_LIB_MMIO
select RT2X00_LIB_CRYPTO
select RT2X00_LIB_FIRMWARE
+ select RT2X00_LIB_EEPROM
select RT2800_LIB
select RT2800_LIB_MMIO
help
@@ -266,6 +268,9 @@ config RT2X00_LIB_FIRMWARE
config RT2X00_LIB_CRYPTO
bool
+config RT2X00_LIB_EEPROM
+ bool
+
config RT2X00_LIB_LEDS
bool
default y if (RT2X00_LIB=y && LEDS_CLASS=y) || (RT2X00_LIB=m && LEDS_CLASS!=n)
--- a/drivers/net/wireless/ralink/rt2x00/Makefile
+++ b/drivers/net/wireless/ralink/rt2x00/Makefile
@@ -8,6 +8,7 @@ rt2x00lib-$(CPTCFG_RT2X00_LIB_DEBUGFS) +
rt2x00lib-$(CPTCFG_RT2X00_LIB_CRYPTO) += rt2x00crypto.o
rt2x00lib-$(CPTCFG_RT2X00_LIB_FIRMWARE) += rt2x00firmware.o
rt2x00lib-$(CPTCFG_RT2X00_LIB_LEDS) += rt2x00leds.o
+rt2x00lib-$(CPTCFG_RT2X00_LIB_EEPROM) += rt2x00eeprom.o
obj-$(CPTCFG_RT2X00_LIB) += rt2x00lib.o
obj-$(CPTCFG_RT2X00_LIB_MMIO) += rt2x00mmio.o
--- a/drivers/net/wireless/ralink/rt2x00/rt2800soc.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800soc.c
@@ -90,19 +90,6 @@ static int rt2800soc_set_device_state(st
return retval;
}
-static int rt2800soc_read_eeprom(struct rt2x00_dev *rt2x00dev)
-{
- void __iomem *base_addr = ioremap(0x1F040000, EEPROM_SIZE);
-
- if (!base_addr)
- return -ENOMEM;
-
- memcpy_fromio(rt2x00dev->eeprom, base_addr, EEPROM_SIZE);
-
- iounmap(base_addr);
- return 0;
-}
-
/* Firmware functions */
static char *rt2800soc_get_firmware_name(struct rt2x00_dev *rt2x00dev)
{
@@ -168,7 +155,7 @@ static const struct rt2800_ops rt2800soc
.register_multiread = rt2x00mmio_register_multiread,
.register_multiwrite = rt2x00mmio_register_multiwrite,
.regbusy_read = rt2x00mmio_regbusy_read,
- .read_eeprom = rt2800soc_read_eeprom,
+ .read_eeprom = rt2x00lib_read_eeprom,
.hwcrypt_disabled = rt2800soc_hwcrypt_disabled,
.drv_write_firmware = rt2800soc_write_firmware,
.drv_init_registers = rt2800mmio_init_registers,
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h
@@ -703,6 +703,7 @@ enum rt2x00_capability_flags {
REQUIRE_HT_TX_DESC,
REQUIRE_PS_AUTOWAKE,
REQUIRE_DELAYED_RFKILL,
+ REQUIRE_EEPROM_FILE,
/*
* Capabilities
--- /dev/null
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00eeprom.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+ * Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
+ * <http://rt2x00.serialmonkey.com>
+ */
+
+/* Module: rt2x00lib
+ * Abstract: rt2x00 eeprom file loading routines.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00soc.h"
+
+static const char *
+rt2x00lib_get_eeprom_file_name(struct rt2x00_dev *rt2x00dev)
+{
+ struct rt2x00_platform_data *pdata = rt2x00dev->dev->platform_data;
+
+ if (pdata && pdata->eeprom_file_name)
+ return pdata->eeprom_file_name;
+
+ return NULL;
+}
+
+static int rt2x00lib_read_eeprom_file(struct rt2x00_dev *rt2x00dev)
+{
+ const struct firmware *ee;
+ const char *ee_name;
+ int retval;
+
+ 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.");
+ return -EINVAL;
+ }
+
+ if (!ee_name)
+ return 0;
+
+ rt2x00_info(rt2x00dev, "Loading EEPROM data from '%s'.\n", ee_name);
+
+ retval = request_firmware(&ee, ee_name, rt2x00dev->dev);
+ if (retval) {
+ rt2x00_err(rt2x00dev, "Failed to request EEPROM.\n");
+ return retval;
+ }
+
+ if (!ee || !ee->size || !ee->data) {
+ rt2x00_err(rt2x00dev, "Failed to read EEPROM file.\n");
+ retval = -ENOENT;
+ goto err_exit;
+ }
+
+ if (ee->size != rt2x00dev->ops->eeprom_size) {
+ rt2x00_err(rt2x00dev,
+ "EEPROM file size is invalid, it should be %d bytes\n",
+ rt2x00dev->ops->eeprom_size);
+ retval = -EINVAL;
+ goto err_release_ee;
+ }
+
+ memcpy(rt2x00dev->eeprom, ee->data, rt2x00dev->ops->eeprom_size);
+
+err_release_ee:
+ release_firmware(ee);
+err_exit:
+ return retval;
+}
+
+int rt2x00lib_read_eeprom(struct rt2x00_dev *rt2x00dev)
+{
+ return rt2x00lib_read_eeprom_file(rt2x00dev);
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_read_eeprom);
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00soc.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00soc.c
@@ -86,6 +86,7 @@ int rt2x00soc_probe(struct platform_devi
if (IS_ERR(rt2x00dev->clk))
rt2x00dev->clk = NULL;
+ set_bit(REQUIRE_EEPROM_FILE, &rt2x00dev->cap_flags);
rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
retval = rt2x00soc_alloc_reg(rt2x00dev);
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00soc.h
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00soc.h
@@ -26,4 +26,13 @@ int rt2x00soc_resume(struct platform_dev
#define rt2x00soc_resume NULL
#endif /* CONFIG_PM */
+/*
+ * EEPROM file handlers.
+ */
+#ifdef CPTCFG_RT2X00_LIB_EEPROM
+int rt2x00lib_read_eeprom(struct rt2x00_dev *rt2x00dev);
+#else
+#define rt2x00lib_read_eeprom NULL
+#endif /* CPTCFG_RT2X00_LIB_EEPROM */
+
#endif /* RT2X00SOC_H */
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