diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch b/target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch index f22a8646c0..38925cf346 100644 --- a/target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch +++ b/target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch @@ -282,224 +282,6 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> obj-$(CONFIG_VEXPRESS_SYSCFG) += vexpress-syscfg.o obj-$(CONFIG_CXL_BASE) += cxl/ +obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx-nvram.o ---- /dev/null -+++ b/drivers/misc/bcm47xx-nvram.c -@@ -0,0 +1,215 @@ -+/* -+ * 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> -+ -+struct bcm47xx_nvram { -+ size_t nvram_len; -+ char *nvram_buf; -+}; -+ -+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 struct device *dev, const char *name, char *val, -+ size_t val_len) -+{ -+ char *var, *value, *end, *eq; -+ struct bcm47xx_nvram *nvram; -+ -+ if (!dev) -+ return -ENODEV; -+ -+ nvram = dev_get_drvdata(dev); -+ -+ 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 struct device *dev, const char *name) -+{ -+ int i, err; -+ char nvram_var[10]; -+ char buf[30]; -+ -+ if (!dev) -+ return -ENODEV; -+ -+ for (i = 0; i < 32; i++) { -+ err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i); -+ if (err <= 0) -+ continue; -+ err = bcm47xx_nvram_getenv(dev, 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; -+ struct bcm47xx_nvram *nvram; -+ 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; -+ -+ platform_set_drvdata(pdev, nvram); -+ -+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"); --- a/drivers/net/ethernet/broadcom/b44.c +++ b/drivers/net/ethernet/broadcom/b44.c @@ -411,7 +411,7 @@ static void b44_wap54g10_workaround(stru |