346 lines
12 KiB
Diff
346 lines
12 KiB
Diff
From 71a6bff8656a1713615ffdd9139a83d65ba46c6d Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sat, 3 May 2014 22:54:59 +0200
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Subject: [PATCH 02/17] bcm47xx-nvram: add new broadcom nvram driver with dt
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support
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This adds a new driver which searches at a given memory range for a
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nvram like it is used on the bcm47xx and bcm53xx SoCs with ARM and MIPS
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CPUs. This driver provides acces to this nvram to other device in the
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device tree. You have to specify the memory ranges where the content of
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the flash chip is memory mapped and this driver will search there for
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some nvram and parse it. Other drivers can use this driver to access the
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device nvram. The nvram is used to store board configurations like the
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mac addresses, the switch configuration and the calibration data for
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the wifi devices.
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This was copied from arch/mips/bcm47xx/nvram.c and modified to interact
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with device tree. My plan is to make the MIPS bcm47xx also use this new
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driver some time later.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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.../devicetree/bindings/misc/bcm47xx-nvram.txt | 19 ++
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arch/mips/bcm47xx/board.c | 40 ++--
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arch/mips/bcm47xx/nvram.c | 7 +-
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arch/mips/bcm47xx/setup.c | 4 +-
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arch/mips/bcm47xx/sprom.c | 4 +-
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arch/mips/bcm47xx/time.c | 2 +-
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drivers/misc/Kconfig | 5 +
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drivers/misc/Makefile | 1 +
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drivers/misc/bcm47xx-nvram.c | 215 +++++++++++++++++++++
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drivers/net/ethernet/broadcom/b44.c | 2 +-
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drivers/net/ethernet/broadcom/bgmac.c | 5 +-
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drivers/ssb/driver_chipcommon_pmu.c | 3 +-
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include/linux/bcm47xx_nvram.h | 17 +-
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13 files changed, 286 insertions(+), 38 deletions(-)
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create mode 100644 Documentation/devicetree/bindings/misc/bcm47xx-nvram.txt
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create mode 100644 drivers/misc/bcm47xx-nvram.c
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/misc/bcm47xx-nvram.txt
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@@ -0,0 +1,19 @@
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+Broadcom bcm47xx/bcm53xx nvram access driver
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+
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+This driver provides access to the nvram for other drivers.
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+
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+Required properties:
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+
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+- compatible : brcm,bcm47xx-nvram
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+
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+- reg : iomem address range
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+
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+On NorthStar ARM SoCs the NAND flash is available at 0x1c000000 and the
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+NOR flash is at 0x1e000000
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+
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+Example:
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+
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+nvram0: nvram@0 {
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+ compatible = "brcm,bcm47xx-nvram";
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+ reg = <0x1c000000 0x01000000>;
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+};
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--- a/arch/mips/bcm47xx/board.c
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+++ b/arch/mips/bcm47xx/board.c
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@@ -196,50 +196,50 @@ static __init const struct bcm47xx_board
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const struct bcm47xx_board_type_list2 *e2;
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const struct bcm47xx_board_type_list3 *e3;
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- if (bcm47xx_nvram_getenv("model_name", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "model_name", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_model_name; e1->value1; e1++) {
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if (!strcmp(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("model_no", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "model_no", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_model_no; e1->value1; e1++) {
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if (strstarts(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("machine_name", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "machine_name", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_machine_name; e1->value1; e1++) {
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if (strstarts(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("hardware_version", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "hardware_version", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_hardware_version; e1->value1; e1++) {
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if (strstarts(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("productid", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "productid", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_productid; e1->value1; e1++) {
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if (!strcmp(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("ModelId", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "ModelId", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_ModelId; e1->value1; e1++) {
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if (!strcmp(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("melco_id", buf1, sizeof(buf1)) >= 0 ||
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- bcm47xx_nvram_getenv("buf1falo_id", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "melco_id", buf1, sizeof(buf1)) >= 0 ||
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+ bcm47xx_nvram_getenv(NULL, "buf1falo_id", buf1, sizeof(buf1)) >= 0) {
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/* buffalo hardware, check id for specific hardware matches */
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for (e1 = bcm47xx_board_list_melco_id; e1->value1; e1++) {
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if (!strcmp(buf1, e1->value1))
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@@ -247,8 +247,8 @@ static __init const struct bcm47xx_board
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}
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}
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- if (bcm47xx_nvram_getenv("boot_hw_model", buf1, sizeof(buf1)) >= 0 &&
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- bcm47xx_nvram_getenv("boot_hw_ver", buf2, sizeof(buf2)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "boot_hw_model", buf1, sizeof(buf1)) >= 0 &&
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+ bcm47xx_nvram_getenv(NULL, "boot_hw_ver", buf2, sizeof(buf2)) >= 0) {
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for (e2 = bcm47xx_board_list_boot_hw; e2->value1; e2++) {
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if (!strcmp(buf1, e2->value1) &&
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!strcmp(buf2, e2->value2))
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@@ -256,16 +256,16 @@ static __init const struct bcm47xx_board
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}
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}
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- if (bcm47xx_nvram_getenv("board_id", buf1, sizeof(buf1)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "board_id", buf1, sizeof(buf1)) >= 0) {
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for (e1 = bcm47xx_board_list_board_id; e1->value1; e1++) {
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if (!strcmp(buf1, e1->value1))
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return &e1->board;
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}
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}
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- if (bcm47xx_nvram_getenv("boardtype", buf1, sizeof(buf1)) >= 0 &&
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- bcm47xx_nvram_getenv("boardnum", buf2, sizeof(buf2)) >= 0 &&
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- bcm47xx_nvram_getenv("boardrev", buf3, sizeof(buf3)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "boardtype", buf1, sizeof(buf1)) >= 0 &&
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+ bcm47xx_nvram_getenv(NULL, "boardnum", buf2, sizeof(buf2)) >= 0 &&
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+ bcm47xx_nvram_getenv(NULL, "boardrev", buf3, sizeof(buf3)) >= 0) {
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for (e3 = bcm47xx_board_list_board; e3->value1; e3++) {
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if (!strcmp(buf1, e3->value1) &&
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!strcmp(buf2, e3->value2) &&
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@@ -286,7 +286,7 @@ void __init bcm47xx_board_detect(void)
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return;
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/* check if the nvram is available */
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- err = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf));
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+ err = bcm47xx_nvram_getenv(NULL, "boardtype", buf, sizeof(buf));
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/* init of nvram failed, probably too early now */
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if (err == -ENXIO) {
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--- a/arch/mips/bcm47xx/nvram.c
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+++ b/arch/mips/bcm47xx/nvram.c
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@@ -158,7 +158,8 @@ static int nvram_init(void)
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return -ENXIO;
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}
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-int bcm47xx_nvram_getenv(char *name, char *val, size_t val_len)
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+int bcm47xx_nvram_getenv(const struct device *dev, const char *name, char *val,
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+ size_t val_len)
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{
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char *var, *value, *end, *eq;
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int err;
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@@ -190,7 +191,7 @@ int bcm47xx_nvram_getenv(char *name, cha
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}
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EXPORT_SYMBOL(bcm47xx_nvram_getenv);
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-int bcm47xx_nvram_gpio_pin(const char *name)
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+int bcm47xx_nvram_gpio_pin(const struct device *dev, const char *name)
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{
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int i, err;
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char nvram_var[10];
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@@ -200,7 +201,7 @@ int bcm47xx_nvram_gpio_pin(const char *n
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err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i);
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if (err <= 0)
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continue;
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- err = bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf));
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+ err = bcm47xx_nvram_getenv(dev, nvram_var, buf, sizeof(buf));
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if (err <= 0)
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continue;
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if (!strcmp(name, buf))
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--- a/arch/mips/bcm47xx/setup.c
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+++ b/arch/mips/bcm47xx/setup.c
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@@ -123,7 +123,7 @@ static int bcm47xx_get_invariants(struct
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memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
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bcm47xx_fill_sprom(&iv->sprom, NULL, false);
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- if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
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+ if (bcm47xx_nvram_getenv(NULL, "cardbus", buf, sizeof(buf)) >= 0)
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iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
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return 0;
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@@ -146,7 +146,7 @@ static void __init bcm47xx_register_ssb(
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panic("Failed to initialize SSB bus (err %d)", err);
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mcore = &bcm47xx_bus.ssb.mipscore;
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- if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "kernel_args", buf, sizeof(buf)) >= 0) {
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if (strstr(buf, "console=ttyS1")) {
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struct ssb_serial_port port;
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--- a/arch/mips/bcm47xx/sprom.c
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+++ b/arch/mips/bcm47xx/sprom.c
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@@ -50,10 +50,10 @@ static int get_nvram_var(const char *pre
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create_key(prefix, postfix, name, key, sizeof(key));
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- err = bcm47xx_nvram_getenv(key, buf, len);
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+ err = bcm47xx_nvram_getenv(NULL, key, buf, len);
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if (fallback && err == -ENOENT && prefix) {
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create_key(NULL, postfix, name, key, sizeof(key));
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- err = bcm47xx_nvram_getenv(key, buf, len);
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+ err = bcm47xx_nvram_getenv(NULL, key, buf, len);
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}
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return err;
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}
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--- a/arch/mips/bcm47xx/time.c
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+++ b/arch/mips/bcm47xx/time.c
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@@ -61,7 +61,7 @@ void __init plat_time_init(void)
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}
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if (chip_id == 0x5354) {
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- len = bcm47xx_nvram_getenv("clkfreq", buf, sizeof(buf));
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+ len = bcm47xx_nvram_getenv(NULL, "clkfreq", buf, sizeof(buf));
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if (len >= 0 && !strncmp(buf, "200", 4))
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hz = 100000000;
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}
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--- a/drivers/misc/Kconfig
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+++ b/drivers/misc/Kconfig
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@@ -515,6 +515,11 @@ config SRAM
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the genalloc API. It is supposed to be used for small on-chip SRAM
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areas found on many SoCs.
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+config BCM47XX_NVRAM
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+ tristate "BCM47XX nvram driver"
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+ help
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+ This adds support for the brcm47xx nvram driver.
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+
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source "drivers/misc/c2port/Kconfig"
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source "drivers/misc/eeprom/Kconfig"
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source "drivers/misc/cb710/Kconfig"
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--- a/drivers/misc/Makefile
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+++ b/drivers/misc/Makefile
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@@ -54,3 +54,4 @@ obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lat
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obj-$(CONFIG_SRAM) += sram.o
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obj-y += mic/
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obj-$(CONFIG_GENWQE) += genwqe/
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+obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx-nvram.o
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--- a/drivers/net/ethernet/broadcom/b44.c
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+++ b/drivers/net/ethernet/broadcom/b44.c
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@@ -411,7 +411,7 @@ static void b44_wap54g10_workaround(stru
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* see https://dev.openwrt.org/ticket/146
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* check and reset bit "isolate"
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*/
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- if (bcm47xx_nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
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+ if (bcm47xx_nvram_getenv(NULL, "boardnum", buf, sizeof(buf)) < 0)
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return;
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if (simple_strtoul(buf, NULL, 0) == 2) {
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err = __b44_readphy(bp, 0, MII_BMCR, &val);
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--- a/drivers/net/ethernet/broadcom/bgmac.c
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+++ b/drivers/net/ethernet/broadcom/bgmac.c
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@@ -974,7 +974,8 @@ static void bgmac_chip_reset(struct bgma
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BGMAC_CHIPCTL_1_IF_TYPE_MII;
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char buf[4];
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- if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
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+ if (bcm47xx_nvram_getenv(NULL, "et_swtype", buf,
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+ sizeof(buf)) > 0) {
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if (kstrtou8(buf, 0, &et_swtype))
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bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n",
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buf);
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@@ -1534,7 +1535,7 @@ static int bgmac_probe(struct bcma_devic
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}
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bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
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- if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
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+ if (bcm47xx_nvram_getenv(NULL, "et0_no_txint", NULL, 0) == 0)
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bgmac->int_mask &= ~BGMAC_IS_TX_MASK;
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/* TODO: reset the external phy. Specs are needed */
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--- a/drivers/ssb/driver_chipcommon_pmu.c
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+++ b/drivers/ssb/driver_chipcommon_pmu.c
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@@ -319,7 +319,8 @@ static void ssb_pmu_pll_init(struct ssb_
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if (bus->bustype == SSB_BUSTYPE_SSB) {
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char buf[20];
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- if (bcm47xx_nvram_getenv("xtalfreq", buf, sizeof(buf)) >= 0)
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+ if (bcm47xx_nvram_getenv(NULL, "xtalfreq", buf,
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+ sizeof(buf)) >= 0)
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crystalfreq = simple_strtoul(buf, NULL, 0);
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}
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--- a/include/linux/bcm47xx_nvram.h
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+++ b/include/linux/bcm47xx_nvram.h
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@@ -15,9 +15,11 @@
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#include <linux/types.h>
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#include <linux/kernel.h>
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+struct device;
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+
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struct nvram_header {
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u32 magic;
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- u32 len;
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+ __le32 len;
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u32 crc_ver_init; /* 0:7 crc, 8:15 ver, 16:31 sdram_init */
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u32 config_refresh; /* 0:15 sdram_config, 16:31 sdram_refresh */
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u32 config_ncdl; /* ncdl values for memc */
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@@ -33,18 +35,21 @@ struct nvram_header {
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#define NVRAM_MAX_VALUE_LEN 255
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#define NVRAM_MAX_PARAM_LEN 64
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-#ifdef CONFIG_BCM47XX
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-int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
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+#if defined(CONFIG_BCM47XX) || defined(CONFIG_BCM47XX_NVRAM)
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+int bcm47xx_nvram_getenv(const struct device *dev, const char *name, char *val,
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+ size_t val_len);
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-int bcm47xx_nvram_gpio_pin(const char *name);
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+int bcm47xx_nvram_gpio_pin(const struct device *dev, const char *name);
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#else
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-static inline int bcm47xx_nvram_getenv(const char *name, char *val,
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+static inline int bcm47xx_nvram_getenv(const struct device *dev,
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+ const char *name, char *val,
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size_t val_len)
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{
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return -ENXIO;
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}
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-static inline int bcm47xx_nvram_gpio_pin(const char *name)
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+static inline int bcm47xx_nvram_gpio_pin(const struct device *dev,
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+ const char *name)
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{
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return -ENXIO;
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}
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