bcm53xx: backport NVRAM driver sent upstream

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43612 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 217 deletions

diff --git a/target/linux/bcm53xx/files/drivers/misc/bcm47xx-nvram.c b/target/linux/bcm53xx/files/drivers/misc/bcm47xx-nvram.c
deleted file mode 100644
index d1f9d7c6ae..0000000000
--- a/target/linux/bcm53xx/files/drivers/misc/bcm47xx-nvram.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * BCM947xx nvram variable access
- *
- * Copyright (C) 2005 Broadcom Corporation
- * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2010-2014 Hauke Mehrtens <hauke@hauke-m.de>
- *
- * 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/types.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/of_address.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/bcm47xx_nvram.h>
-
-#define NVRAM_HEADER		0x48534C46	/* 'FLSH' */
-#define NVRAM_SPACE		0x8000
-
-#define FLASH_MIN		0x00020000	/* Minimum flash size */
-
-struct nvram_header {
-	u32 magic;
-	u32 len;
-	u32 crc_ver_init;	/* 0:7 crc, 8:15 ver, 16:31 sdram_init */
-	u32 config_refresh;	/* 0:15 sdram_config, 16:31 sdram_refresh */
-	u32 config_ncdl;	/* ncdl values for memc */
-};
-
-struct bcm47xx_nvram {
-	size_t nvram_len;
-	char *nvram_buf;
-};
-
-static struct bcm47xx_nvram *nvram = NULL;
-
-static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000};
-
-static u32 find_nvram_size(void __iomem *end)
-{
-	struct nvram_header __iomem *header;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) {
-		header = (struct nvram_header __iomem *)(end - nvram_sizes[i]);
-		if (__raw_readl(&header->magic) == NVRAM_HEADER)
-			return nvram_sizes[i];
-	}
-
-	return 0;
-}
-
-/* Probe for NVRAM header */
-static int nvram_find_and_copy(struct device *dev, void __iomem *base,
-			       size_t len, char **nvram_buf,
-			       size_t *nvram_len)
-{
-	struct nvram_header __iomem *header;
-	int i;
-	u32 off;
-	u32 *dst;
-	__le32 __iomem *src;
-	u32 size;
-
-	/* TODO: when nvram is on nand flash check for bad blocks first. */
-	off = FLASH_MIN;
-	while (off <= len) {
-		/* Windowed flash access */
-		size = find_nvram_size(base + off);
-		if (size) {
-			header = (struct nvram_header __iomem *)
-					(base + off - size);
-			goto found;
-		}
-		off += 0x10000;
-	}
-
-	/* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
-	header = (struct nvram_header __iomem *)(base + 4096);
-	if (__raw_readl(&header->magic) == NVRAM_HEADER) {
-		size = NVRAM_SPACE;
-		goto found;
-	}
-
-	header = (struct nvram_header __iomem *)(base + 1024);
-	if (__raw_readl(&header->magic) == NVRAM_HEADER) {
-		size = NVRAM_SPACE;
-		goto found;
-	}
-
-	*nvram_buf = NULL;
-	*nvram_len = 0;
-	pr_err("no nvram found\n");
-	return -ENXIO;
-
-found:
-	if (readl(&header->len) > size)
-		pr_err("The nvram size accoridng to the header seems to be bigger than the partition on flash\n");
-	*nvram_len = min_t(u32, readl(&header->len), size);
-
-	*nvram_buf = devm_kzalloc(dev, *nvram_len, GFP_KERNEL);
-	if (!*nvram_buf)
-		return -ENOMEM;
-
-	src = (__le32 __iomem *) header;
-	dst = (u32 *) *nvram_buf;
-	for (i = 0; i < sizeof(struct nvram_header); i += 4)
-		*dst++ = __raw_readl(src++);
-	for (; i < *nvram_len; i += 4)
-		*dst++ = readl(src++);
-
-	return 0;
-}
-
-int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
-{
-	char *var, *value, *end, *eq;
-
-	if (!name || !nvram || !nvram->nvram_len)
-		return -EINVAL;
-
-	/* Look for name=value and return value */
-	var = nvram->nvram_buf + sizeof(struct nvram_header);
-	end = nvram->nvram_buf + nvram->nvram_len - 2;
-	end[0] = end[1] = '\0';
-	for (; *var; var = value + strlen(value) + 1) {
-		eq = strchr(var, '=');
-		if (!eq)
-			break;
-		value = eq + 1;
-		if ((eq - var) == strlen(name) &&
-			strncmp(var, name, (eq - var)) == 0) {
-			return snprintf(val, val_len, "%s", value);
-		}
-	}
-	return -ENOENT;
-}
-EXPORT_SYMBOL(bcm47xx_nvram_getenv);
-
-int bcm47xx_nvram_gpio_pin(const char *name)
-{
-	int i, err;
-	char nvram_var[10];
-	char buf[30];
-
-	for (i = 0; i < 32; i++) {
-		err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i);
-		if (err <= 0)
-			continue;
-		err = bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf));
-		if (err <= 0)
-			continue;
-		if (!strcmp(name, buf))
-			return i;
-	}
-	return -ENOENT;
-}
-EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin);
-
-static int bcm47xx_nvram_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	int err;
-	struct resource flash_mem;
-	void __iomem *mmio;
-
-	/* Alloc */
-	nvram = devm_kzalloc(dev, sizeof(*nvram), GFP_KERNEL);
-	if (!nvram)
-		return -ENOMEM;
-
-	err = of_address_to_resource(np, 0, &flash_mem);
-	if (err)
-		return err;
-
-	mmio = ioremap_nocache(flash_mem.start, resource_size(&flash_mem));
-	if (!mmio)
-		return -ENOMEM;
-
-	err = nvram_find_and_copy(dev, mmio, resource_size(&flash_mem),
-				  &nvram->nvram_buf, &nvram->nvram_len);
-	if (err)
-		goto err_unmap_mmio;
-
-err_unmap_mmio:
-	iounmap(mmio);
-	return err;
-}
-
-static const struct of_device_id bcm47xx_nvram_of_match_table[] = {
-	{ .compatible = "brcm,bcm47xx-nvram", },
-	{},
-};
-MODULE_DEVICE_TABLE(of, mvebu_pcie_of_match_table);
-
-static struct platform_driver bcm47xx_nvram_driver = {
-	.driver = {
-		.owner = THIS_MODULE,
-		.name = "bcm47xx-nvram",
-		.of_match_table = bcm47xx_nvram_of_match_table,
-		/* driver unloading/unbinding currently not supported */
-		.suppress_bind_attrs = true,
-	},
-	.probe = bcm47xx_nvram_probe,
-};
-module_platform_driver(bcm47xx_nvram_driver);
-
-MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>");
-MODULE_LICENSE("GPLv2");