kernel: remove support for kernel 4.19

We use 5.4 on all targets by default, and 4.19 has never been released
in a stable version. There is no reason to keep it.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 304 deletions

diff --git a/target/linux/bcm47xx/patches-4.19/820-wgt634u-nvram-fix.patch b/target/linux/bcm47xx/patches-4.19/820-wgt634u-nvram-fix.patch
deleted file mode 100644
index aaab39ae41..0000000000
--- a/target/linux/bcm47xx/patches-4.19/820-wgt634u-nvram-fix.patch
+++ /dev/null
@@ -1,304 +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
-@@ -1,2 +1,2 @@
--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
-@@ -37,6 +37,8 @@ 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);
- 
- static u32 find_nvram_size(void __iomem *end)
- {
-@@ -56,7 +58,9 @@ static u32 find_nvram_size(void __iomem
- static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
- {
- 	struct nvram_header __iomem *header;
-+	int i;
- 	u32 off;
-+	u32 *src, *dst;
- 	u32 size;
- 
- 	if (nvram_len) {
-@@ -64,6 +68,26 @@ static int nvram_find_and_copy(void __io
- 		return -EEXIST;
- 	}
- 
-+	cfe_env = 0;
-+
-+	/* XXX: hack for supporting the CFE environment stuff on WGT634U */
-+	if (lim >= 8 * 1024 * 1024) {
-+		src = (u32 *)(iobase + 8 * 1024 * 1024 - 0x2000);
-+		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. */
- 	off = FLASH_MIN;
- 	while (off <= lim) {
-@@ -174,6 +198,13 @@ 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)