From 1046fc9e98936991aeb0b0656c84833d96a63c0f Mon Sep 17 00:00:00 2001 From: Christian Marangi 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 --- 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 + * Copyright (C) 2004 - 2009 Gertjan van Wingerde + * + */ + +/* Module: rt2x00lib + * Abstract: rt2x00 eeprom file loading routines. + */ + +#include +#include + +#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 */