diff options
Diffstat (limited to 'target/linux/bcm47xx/patches-5.4/820-wgt634u-nvram-fix.patch')
| -rw-r--r-- | target/linux/bcm47xx/patches-5.4/820-wgt634u-nvram-fix.patch | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/target/linux/bcm47xx/patches-5.4/820-wgt634u-nvram-fix.patch b/target/linux/bcm47xx/patches-5.4/820-wgt634u-nvram-fix.patch deleted file mode 100644 index 5f4af85df2..0000000000 --- a/target/linux/bcm47xx/patches-5.4/820-wgt634u-nvram-fix.patch +++ /dev/null @@ -1,295 +0,0 @@ -The Netgear wgt634u uses a different format for storing the -configuration. This patch is needed to read out the correct -configuration. The cfe_env.c file uses a different method way to read -out the configuration than the in kernel cfe config reader. - ---- a/drivers/firmware/broadcom/Makefile -+++ b/drivers/firmware/broadcom/Makefile -@@ -1,3 +1,3 @@ - # SPDX-License-Identifier: GPL-2.0-only --obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx_nvram.o -+obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx_nvram.o cfe_env.o - obj-$(CONFIG_BCM47XX_SPROM) += bcm47xx_sprom.o ---- /dev/null -+++ b/drivers/firmware/broadcom/cfe_env.c -@@ -0,0 +1,228 @@ -+/* -+ * CFE environment variable access -+ * -+ * Copyright 2001-2003, Broadcom Corporation -+ * Copyright 2006, Felix Fietkau <nbd@nbd.name> -+ * -+ * This program is free software; you can redistribute it and/or modify it -+ * under the terms of the GNU General Public License as published by the -+ * Free Software Foundation; either version 2 of the License, or (at your -+ * option) any later version. -+ */ -+ -+#include <linux/init.h> -+#include <linux/module.h> -+#include <linux/kernel.h> -+#include <linux/string.h> -+#include <asm/io.h> -+#include <linux/uaccess.h> -+ -+#define NVRAM_SIZE (0x1ff0) -+static char _nvdata[NVRAM_SIZE]; -+static char _valuestr[256]; -+ -+/* -+ * TLV types. These codes are used in the "type-length-value" -+ * encoding of the items stored in the NVRAM device (flash or EEPROM) -+ * -+ * The layout of the flash/nvram is as follows: -+ * -+ * <type> <length> <data ...> <type> <length> <data ...> <type_end> -+ * -+ * The type code of "ENV_TLV_TYPE_END" marks the end of the list. -+ * The "length" field marks the length of the data section, not -+ * including the type and length fields. -+ * -+ * Environment variables are stored as follows: -+ * -+ * <type_env> <length> <flags> <name> = <value> -+ * -+ * If bit 0 (low bit) is set, the length is an 8-bit value. -+ * If bit 0 (low bit) is clear, the length is a 16-bit value -+ * -+ * Bit 7 set indicates "user" TLVs. In this case, bit 0 still -+ * indicates the size of the length field. -+ * -+ * Flags are from the constants below: -+ * -+ */ -+#define ENV_LENGTH_16BITS 0x00 /* for low bit */ -+#define ENV_LENGTH_8BITS 0x01 -+ -+#define ENV_TYPE_USER 0x80 -+ -+#define ENV_CODE_SYS(n,l) (((n)<<1)|(l)) -+#define ENV_CODE_USER(n,l) ((((n)<<1)|(l)) | ENV_TYPE_USER) -+ -+/* -+ * The actual TLV types we support -+ */ -+ -+#define ENV_TLV_TYPE_END 0x00 -+#define ENV_TLV_TYPE_ENV ENV_CODE_SYS(0,ENV_LENGTH_8BITS) -+ -+/* -+ * Environment variable flags -+ */ -+ -+#define ENV_FLG_NORMAL 0x00 /* normal read/write */ -+#define ENV_FLG_BUILTIN 0x01 /* builtin - not stored in flash */ -+#define ENV_FLG_READONLY 0x02 /* read-only - cannot be changed */ -+ -+#define ENV_FLG_MASK 0xFF /* mask of attributes we keep */ -+#define ENV_FLG_ADMIN 0x100 /* lets us internally override permissions */ -+ -+ -+/* ********************************************************************* -+ * _nvram_read(buffer,offset,length) -+ * -+ * Read data from the NVRAM device -+ * -+ * Input parameters: -+ * buffer - destination buffer -+ * offset - offset of data to read -+ * length - number of bytes to read -+ * -+ * Return value: -+ * number of bytes read, or <0 if error occured -+ ********************************************************************* */ -+static int -+_nvram_read(unsigned char *nv_buf, unsigned char *buffer, int offset, int length) -+{ -+ int i; -+ if (offset > NVRAM_SIZE) -+ return -1; -+ -+ for ( i = 0; i < length; i++) { -+ buffer[i] = ((volatile unsigned char*)nv_buf)[offset + i]; -+ } -+ return length; -+} -+ -+ -+static char* -+_strnchr(const char *dest,int c,size_t cnt) -+{ -+ while (*dest && (cnt > 0)) { -+ if (*dest == c) return (char *) dest; -+ dest++; -+ cnt--; -+ } -+ return NULL; -+} -+ -+ -+ -+/* -+ * Core support API: Externally visible. -+ */ -+ -+/* -+ * Get the value of an NVRAM variable -+ * @param name name of variable to get -+ * @return value of variable or NULL if undefined -+ */ -+ -+char *cfe_env_get(unsigned char *nv_buf, const char *name) -+{ -+ int size; -+ unsigned char *buffer; -+ unsigned char *ptr; -+ unsigned char *envval; -+ unsigned int reclen; -+ unsigned int rectype; -+ int offset; -+ int flg; -+ -+ if (!strcmp(name, "nvram_type")) -+ return "cfe"; -+ -+ size = NVRAM_SIZE; -+ buffer = &_nvdata[0]; -+ -+ ptr = buffer; -+ offset = 0; -+ -+ /* Read the record type and length */ -+ if (_nvram_read(nv_buf, ptr,offset,1) != 1) { -+ goto error; -+ } -+ -+ while ((*ptr != ENV_TLV_TYPE_END) && (size > 1)) { -+ -+ /* Adjust pointer for TLV type */ -+ rectype = *(ptr); -+ offset++; -+ size--; -+ -+ /* -+ * Read the length. It can be either 1 or 2 bytes -+ * depending on the code -+ */ -+ if (rectype & ENV_LENGTH_8BITS) { -+ /* Read the record type and length - 8 bits */ -+ if (_nvram_read(nv_buf, ptr,offset,1) != 1) { -+ goto error; -+ } -+ reclen = *(ptr); -+ size--; -+ offset++; -+ } -+ else { -+ /* Read the record type and length - 16 bits, MSB first */ -+ if (_nvram_read(nv_buf, ptr,offset,2) != 2) { -+ goto error; -+ } -+ reclen = (((unsigned int) *(ptr)) << 8) + (unsigned int) *(ptr+1); -+ size -= 2; -+ offset += 2; -+ } -+ -+ if (reclen > size) -+ break; /* should not happen, bad NVRAM */ -+ -+ switch (rectype) { -+ case ENV_TLV_TYPE_ENV: -+ /* Read the TLV data */ -+ if (_nvram_read(nv_buf, ptr,offset,reclen) != reclen) -+ goto error; -+ flg = *ptr++; -+ envval = (unsigned char *) _strnchr(ptr,'=',(reclen-1)); -+ if (envval) { -+ *envval++ = '\0'; -+ memcpy(_valuestr,envval,(reclen-1)-(envval-ptr)); -+ _valuestr[(reclen-1)-(envval-ptr)] = '\0'; -+#if 0 -+ printk(KERN_INFO "NVRAM:%s=%s\n", ptr, _valuestr); -+#endif -+ if(!strcmp(ptr, name)){ -+ return _valuestr; -+ } -+ if((strlen(ptr) > 1) && !strcmp(&ptr[1], name)) -+ return _valuestr; -+ } -+ break; -+ -+ default: -+ /* Unknown TLV type, skip it. */ -+ break; -+ } -+ -+ /* -+ * Advance to next TLV -+ */ -+ -+ size -= (int)reclen; -+ offset += reclen; -+ -+ /* Read the next record type */ -+ ptr = buffer; -+ if (_nvram_read(nv_buf, ptr,offset,1) != 1) -+ goto error; -+ } -+ -+error: -+ return NULL; -+ -+} -+ ---- a/drivers/firmware/broadcom/bcm47xx_nvram.c -+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c -@@ -33,6 +33,8 @@ struct nvram_header { - static char nvram_buf[NVRAM_SPACE]; - static size_t nvram_len; - static const u32 nvram_sizes[] = {0x6000, 0x8000, 0xF000, 0x10000}; -+static int cfe_env; -+extern char *cfe_env_get(char *nv_buf, const char *name); - - /** - * bcm47xx_nvram_is_valid - check for a valid NVRAM at specified memory -@@ -80,6 +82,26 @@ static int bcm47xx_nvram_find_and_copy(v - return -EEXIST; - } - -+ cfe_env = 0; -+ -+ /* XXX: hack for supporting the CFE environment stuff on WGT634U */ -+ if (res_size >= 8 * 1024 * 1024) { -+ u32 *src = (u32 *)(flash_start + 8 * 1024 * 1024 - 0x2000); -+ u32 *dst = (u32 *)nvram_buf; -+ -+ if ((*src & 0xff00ff) == 0x000001) { -+ printk("early_nvram_init: WGT634U NVRAM found.\n"); -+ -+ for (i = 0; i < 0x1ff0; i++) { -+ if (*src == 0xFFFFFFFF) -+ break; -+ *dst++ = *src++; -+ } -+ cfe_env = 1; -+ return 0; -+ } -+ } -+ - /* TODO: when nvram is on nand flash check for bad blocks first. */ - - /* Try every possible flash size and check for NVRAM at its end */ -@@ -172,6 +194,13 @@ int bcm47xx_nvram_getenv(const char *nam - if (!name) - return -EINVAL; - -+ if (cfe_env) { -+ value = cfe_env_get(nvram_buf, name); -+ if (!value) -+ return -ENOENT; -+ return snprintf(val, val_len, "%s", value); -+ } -+ - if (!nvram_len) { - err = nvram_init(); - if (err) |