F: drivers/gpio/gpio-bcm-kona.c
F: Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt
+BROADCOM NVRAM DRIVER
+M: Rafał Miłecki <zajec5@gmail.com>
+L: linux-mips@linux-mips.org
+S: Maintained
+F: drivers/firmware/broadcom/*
+
BROADCOM SPECIFIC AMBA DRIVER (BCMA)
M: Rafał Miłecki <zajec5@gmail.com>
L: linux-wireless@vger.kernel.org
select USE_GENERIC_EARLY_PRINTK_8250
select GPIOLIB
select LEDS_GPIO_REGISTER
+ select BCM47XX_NVRAM
help
Support for BCM47XX based boards
# under Linux.
#
-obj-y += irq.o nvram.o prom.o serial.o setup.o time.o sprom.o
+obj-y += irq.o prom.o serial.o setup.o time.o sprom.o
obj-y += board.o buttons.o leds.o workarounds.o
+++ /dev/null
-/*
- * BCM947xx nvram variable access
- *
- * Copyright (C) 2005 Broadcom Corporation
- * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2010-2012 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/io.h>
-#include <linux/types.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/mtd/mtd.h>
-#include <linux/bcm47xx_nvram.h>
-
-#define NVRAM_MAGIC 0x48534C46 /* 'FLSH' */
-#define NVRAM_SPACE 0x10000
-#define NVRAM_MAX_GPIO_ENTRIES 32
-#define NVRAM_MAX_GPIO_VALUE_LEN 30
-
-#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 */
-};
-
-static char nvram_buf[NVRAM_SPACE];
-static size_t nvram_len;
-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 *)(end - nvram_sizes[i]);
- if (header->magic == NVRAM_MAGIC)
- return nvram_sizes[i];
- }
-
- return 0;
-}
-
-/* Probe for NVRAM header */
-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) {
- pr_warn("nvram already initialized\n");
- return -EEXIST;
- }
-
- /* TODO: when nvram is on nand flash check for bad blocks first. */
- off = FLASH_MIN;
- while (off <= lim) {
- /* Windowed flash access */
- size = find_nvram_size(iobase + off);
- if (size) {
- header = (struct nvram_header *)(iobase + off - size);
- goto found;
- }
- off <<= 1;
- }
-
- /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
- header = (struct nvram_header *)(iobase + 4096);
- if (header->magic == NVRAM_MAGIC) {
- size = NVRAM_SPACE;
- goto found;
- }
-
- header = (struct nvram_header *)(iobase + 1024);
- if (header->magic == NVRAM_MAGIC) {
- size = NVRAM_SPACE;
- goto found;
- }
-
- pr_err("no nvram found\n");
- return -ENXIO;
-
-found:
- src = (u32 *)header;
- dst = (u32 *)nvram_buf;
- for (i = 0; i < sizeof(struct nvram_header); i += 4)
- *dst++ = __raw_readl(src++);
- header = (struct nvram_header *)nvram_buf;
- nvram_len = header->len;
- if (nvram_len > size) {
- pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
- nvram_len = size;
- }
- if (nvram_len >= NVRAM_SPACE) {
- pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
- header->len, NVRAM_SPACE - 1);
- nvram_len = NVRAM_SPACE - 1;
- }
- /* proceed reading data after header */
- for (; i < nvram_len; i += 4)
- *dst++ = readl(src++);
- nvram_buf[NVRAM_SPACE - 1] = '\0';
-
- return 0;
-}
-
-/*
- * On bcm47xx we need access to the NVRAM very early, so we can't use mtd
- * subsystem to access flash. We can't even use platform device / driver to
- * store memory offset.
- * To handle this we provide following symbol. It's supposed to be called as
- * soon as we get info about flash device, before any NVRAM entry is needed.
- */
-int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
-{
- void __iomem *iobase;
- int err;
-
- iobase = ioremap_nocache(base, lim);
- if (!iobase)
- return -ENOMEM;
-
- err = nvram_find_and_copy(iobase, lim);
-
- iounmap(iobase);
-
- return err;
-}
-
-static int nvram_init(void)
-{
-#ifdef CONFIG_MTD
- struct mtd_info *mtd;
- struct nvram_header header;
- size_t bytes_read;
- int err;
-
- mtd = get_mtd_device_nm("nvram");
- if (IS_ERR(mtd))
- return -ENODEV;
-
- err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header);
- if (!err && header.magic == NVRAM_MAGIC &&
- header.len > sizeof(header)) {
- nvram_len = header.len;
- if (nvram_len >= NVRAM_SPACE) {
- pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
- header.len, NVRAM_SPACE);
- nvram_len = NVRAM_SPACE - 1;
- }
-
- err = mtd_read(mtd, 0, nvram_len, &nvram_len,
- (u8 *)nvram_buf);
- return err;
- }
-#endif
-
- return -ENXIO;
-}
-
-int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
-{
- char *var, *value, *end, *eq;
- int err;
-
- if (!name)
- return -EINVAL;
-
- if (!nvram_len) {
- err = nvram_init();
- if (err)
- return err;
- }
-
- /* Look for name=value and return value */
- var = &nvram_buf[sizeof(struct nvram_header)];
- end = nvram_buf + sizeof(nvram_buf);
- while (var < end && *var) {
- 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);
- var = value + strlen(value) + 1;
- }
- return -ENOENT;
-}
-EXPORT_SYMBOL(bcm47xx_nvram_getenv);
-
-int bcm47xx_nvram_gpio_pin(const char *name)
-{
- int i, err;
- char nvram_var[] = "gpioXX";
- char buf[NVRAM_MAX_GPIO_VALUE_LEN];
-
- /* TODO: Optimize it to don't call getenv so many times */
- for (i = 0; i < NVRAM_MAX_GPIO_ENTRIES; 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);
-
-char *bcm47xx_nvram_get_contents(size_t *nvram_size)
-{
- int err;
- char *nvram;
-
- if (!nvram_len) {
- err = nvram_init();
- if (err)
- return NULL;
- }
-
- *nvram_size = nvram_len - sizeof(struct nvram_header);
- nvram = vmalloc(*nvram_size);
- if (!nvram)
- return NULL;
- memcpy(nvram, &nvram_buf[sizeof(struct nvram_header)], *nvram_size);
-
- return nvram;
-}
-EXPORT_SYMBOL(bcm47xx_nvram_get_contents);
bool
depends on ARM || ARM64
+source "drivers/firmware/broadcom/Kconfig"
source "drivers/firmware/google/Kconfig"
source "drivers/firmware/efi/Kconfig"
obj-$(CONFIG_QCOM_SCM) += qcom_scm.o
CFLAGS_qcom_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)
+obj-y += broadcom/
obj-$(CONFIG_GOOGLE_FIRMWARE) += google/
obj-$(CONFIG_EFI) += efi/
obj-$(CONFIG_UEFI_CPER) += efi/
--- /dev/null
+config BCM47XX_NVRAM
+ bool "Broadcom NVRAM driver"
+ depends on BCM47XX || ARCH_BCM_5301X
+ help
+ Broadcom home routers contain flash partition called "nvram" with all
+ important hardware configuration as well as some minor user setup.
+ NVRAM partition contains a text-like data representing name=value
+ pairs.
+ This driver provides an easy way to get value of requested parameter.
+ It simply reads content of NVRAM and parses it. It doesn't control any
+ hardware part itself.
--- /dev/null
+obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx_nvram.o
--- /dev/null
+/*
+ * BCM947xx nvram variable access
+ *
+ * Copyright (C) 2005 Broadcom Corporation
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2010-2012 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/io.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mtd/mtd.h>
+#include <linux/bcm47xx_nvram.h>
+
+#define NVRAM_MAGIC 0x48534C46 /* 'FLSH' */
+#define NVRAM_SPACE 0x10000
+#define NVRAM_MAX_GPIO_ENTRIES 32
+#define NVRAM_MAX_GPIO_VALUE_LEN 30
+
+#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 */
+};
+
+static char nvram_buf[NVRAM_SPACE];
+static size_t nvram_len;
+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 *)(end - nvram_sizes[i]);
+ if (header->magic == NVRAM_MAGIC)
+ return nvram_sizes[i];
+ }
+
+ return 0;
+}
+
+/* Probe for NVRAM header */
+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) {
+ pr_warn("nvram already initialized\n");
+ return -EEXIST;
+ }
+
+ /* TODO: when nvram is on nand flash check for bad blocks first. */
+ off = FLASH_MIN;
+ while (off <= lim) {
+ /* Windowed flash access */
+ size = find_nvram_size(iobase + off);
+ if (size) {
+ header = (struct nvram_header *)(iobase + off - size);
+ goto found;
+ }
+ off <<= 1;
+ }
+
+ /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
+ header = (struct nvram_header *)(iobase + 4096);
+ if (header->magic == NVRAM_MAGIC) {
+ size = NVRAM_SPACE;
+ goto found;
+ }
+
+ header = (struct nvram_header *)(iobase + 1024);
+ if (header->magic == NVRAM_MAGIC) {
+ size = NVRAM_SPACE;
+ goto found;
+ }
+
+ pr_err("no nvram found\n");
+ return -ENXIO;
+
+found:
+ src = (u32 *)header;
+ dst = (u32 *)nvram_buf;
+ for (i = 0; i < sizeof(struct nvram_header); i += 4)
+ *dst++ = __raw_readl(src++);
+ header = (struct nvram_header *)nvram_buf;
+ nvram_len = header->len;
+ if (nvram_len > size) {
+ pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
+ nvram_len = size;
+ }
+ if (nvram_len >= NVRAM_SPACE) {
+ pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
+ header->len, NVRAM_SPACE - 1);
+ nvram_len = NVRAM_SPACE - 1;
+ }
+ /* proceed reading data after header */
+ for (; i < nvram_len; i += 4)
+ *dst++ = readl(src++);
+ nvram_buf[NVRAM_SPACE - 1] = '\0';
+
+ return 0;
+}
+
+/*
+ * On bcm47xx we need access to the NVRAM very early, so we can't use mtd
+ * subsystem to access flash. We can't even use platform device / driver to
+ * store memory offset.
+ * To handle this we provide following symbol. It's supposed to be called as
+ * soon as we get info about flash device, before any NVRAM entry is needed.
+ */
+int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
+{
+ void __iomem *iobase;
+ int err;
+
+ iobase = ioremap_nocache(base, lim);
+ if (!iobase)
+ return -ENOMEM;
+
+ err = nvram_find_and_copy(iobase, lim);
+
+ iounmap(iobase);
+
+ return err;
+}
+
+static int nvram_init(void)
+{
+#ifdef CONFIG_MTD
+ struct mtd_info *mtd;
+ struct nvram_header header;
+ size_t bytes_read;
+ int err;
+
+ mtd = get_mtd_device_nm("nvram");
+ if (IS_ERR(mtd))
+ return -ENODEV;
+
+ err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header);
+ if (!err && header.magic == NVRAM_MAGIC &&
+ header.len > sizeof(header)) {
+ nvram_len = header.len;
+ if (nvram_len >= NVRAM_SPACE) {
+ pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
+ header.len, NVRAM_SPACE);
+ nvram_len = NVRAM_SPACE - 1;
+ }
+
+ err = mtd_read(mtd, 0, nvram_len, &nvram_len,
+ (u8 *)nvram_buf);
+ return err;
+ }
+#endif
+
+ return -ENXIO;
+}
+
+int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
+{
+ char *var, *value, *end, *eq;
+ int err;
+
+ if (!name)
+ return -EINVAL;
+
+ if (!nvram_len) {
+ err = nvram_init();
+ if (err)
+ return err;
+ }
+
+ /* Look for name=value and return value */
+ var = &nvram_buf[sizeof(struct nvram_header)];
+ end = nvram_buf + sizeof(nvram_buf);
+ while (var < end && *var) {
+ 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);
+ var = value + strlen(value) + 1;
+ }
+ return -ENOENT;
+}
+EXPORT_SYMBOL(bcm47xx_nvram_getenv);
+
+int bcm47xx_nvram_gpio_pin(const char *name)
+{
+ int i, err;
+ char nvram_var[] = "gpioXX";
+ char buf[NVRAM_MAX_GPIO_VALUE_LEN];
+
+ /* TODO: Optimize it to don't call getenv so many times */
+ for (i = 0; i < NVRAM_MAX_GPIO_ENTRIES; 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);
+
+char *bcm47xx_nvram_get_contents(size_t *nvram_size)
+{
+ int err;
+ char *nvram;
+
+ if (!nvram_len) {
+ err = nvram_init();
+ if (err)
+ return NULL;
+ }
+
+ *nvram_size = nvram_len - sizeof(struct nvram_header);
+ nvram = vmalloc(*nvram_size);
+ if (!nvram)
+ return NULL;
+ memcpy(nvram, &nvram_buf[sizeof(struct nvram_header)], *nvram_size);
+
+ return nvram;
+}
+EXPORT_SYMBOL(bcm47xx_nvram_get_contents);
+
+MODULE_LICENSE("GPLv2");
#include <linux/kernel.h>
#include <linux/vmalloc.h>
-#ifdef CONFIG_BCM47XX
+#ifdef CONFIG_BCM47XX_NVRAM
int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
int bcm47xx_nvram_gpio_pin(const char *name);
projects / firefly-linux-kernel-4.4.55.git / commitdiff