--- /dev/null
+From d135d94b3d1fe599d13e7198d5f502912d694c13 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Sun, 3 Jul 2011 15:00:38 +0200
+Subject: [PATCH 29/60] MIPS: BCM63XX: Register SPI flash if present
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ arch/mips/bcm63xx/dev-flash.c | 35 +++++++++++++++++++-
+ arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h | 2 +
+ 2 files changed, 33 insertions(+), 2 deletions(-)
+
+--- a/arch/mips/bcm63xx/dev-flash.c
++++ b/arch/mips/bcm63xx/dev-flash.c
+@@ -17,6 +17,9 @@
+ #include <linux/mtd/partitions.h>
+ #include <linux/mtd/physmap.h>
+ #include <linux/mtd/spi-nor.h>
++#include <linux/of.h>
++#include <linux/spi/spi.h>
++#include <linux/spi/flash.h>
+
+ #include <bcm63xx_cpu.h>
+ #include <bcm63xx_dev_flash.h>
+@@ -66,6 +69,41 @@ void __init bcm63xx_flash_force_phys_bas
+ mtd_resources[0].end = end;
+ }
+
++static struct spi_board_info bcm63xx_spi_flash_info[] = {
++ {
++ .bus_num = 0,
++ .chip_select = 0,
++ .mode = 0,
++ .max_speed_hz = 781000,
++ .modalias = "m25p80",
++ },
++};
++
++static void bcm63xx_of_update_spi_flash_speed(struct device_node *np,
++ unsigned int new_hz)
++{
++ struct property *max_hz;
++ __be32 *hz;
++
++ max_hz = kzalloc(sizeof(*max_hz) + sizeof(*hz), GFP_KERNEL);
++ if (!max_hz)
++ return;
++
++ max_hz->name = kstrdup("spi-max-frequency", GFP_KERNEL);
++ if (!max_hz->name) {
++ kfree(max_hz);
++ return;
++ }
++
++ max_hz->value = max_hz + 1;
++ max_hz->length = sizeof(*hz);
++
++ hz = max_hz->value;
++ *hz = cpu_to_be32(new_hz);
++
++ of_update_property(np, max_hz);
++}
++
+ static int __init bcm63xx_detect_flash_type(void)
+ {
+ u32 val;
+@@ -73,9 +111,15 @@ static int __init bcm63xx_detect_flash_t
+ switch (bcm63xx_get_cpu_id()) {
+ case BCM6318_CPU_ID:
+ /* only support serial flash */
++ bcm63xx_spi_flash_info[0].max_speed_hz = 62500000;
+ return BCM63XX_FLASH_TYPE_SERIAL;
+ case BCM6328_CPU_ID:
+ val = bcm_misc_readl(MISC_STRAPBUS_6328_REG);
++ if (val & STRAPBUS_6328_HSSPI_CLK_FAST)
++ bcm63xx_spi_flash_info[0].max_speed_hz = 33333334;
++ else
++ bcm63xx_spi_flash_info[0].max_speed_hz = 16666667;
++
+ if (val & STRAPBUS_6328_BOOT_SEL_SERIAL)
+ return BCM63XX_FLASH_TYPE_SERIAL;
+ else
+@@ -94,12 +138,20 @@ static int __init bcm63xx_detect_flash_t
+ return BCM63XX_FLASH_TYPE_SERIAL;
+ case BCM6362_CPU_ID:
+ val = bcm_misc_readl(MISC_STRAPBUS_6362_REG);
++ if (val & STRAPBUS_6362_HSSPI_CLK_FAST)
++ bcm63xx_spi_flash_info[0].max_speed_hz = 50000000;
++ else
++ bcm63xx_spi_flash_info[0].max_speed_hz = 20000000;
++
+ if (val & STRAPBUS_6362_BOOT_SEL_SERIAL)
+ return BCM63XX_FLASH_TYPE_SERIAL;
+ else
+ return BCM63XX_FLASH_TYPE_NAND;
+ case BCM6368_CPU_ID:
+ val = bcm_gpio_readl(GPIO_STRAPBUS_REG);
++ if (val & STRAPBUS_6368_SPI_CLK_FAST)
++ bcm63xx_spi_flash_info[0].max_speed_hz = 20000000;
++
+ switch (val & STRAPBUS_6368_BOOT_SEL_MASK) {
+ case STRAPBUS_6368_BOOT_SEL_NAND:
+ return BCM63XX_FLASH_TYPE_NAND;
+@@ -110,6 +162,11 @@ static int __init bcm63xx_detect_flash_t
+ }
+ case BCM63268_CPU_ID:
+ val = bcm_misc_readl(MISC_STRAPBUS_63268_REG);
++ if (val & STRAPBUS_63268_HSSPI_CLK_FAST)
++ bcm63xx_spi_flash_info[0].max_speed_hz = 50000000;
++ else
++ bcm63xx_spi_flash_info[0].max_speed_hz = 20000000;
++
+ if (val & STRAPBUS_63268_BOOT_SEL_SERIAL)
+ return BCM63XX_FLASH_TYPE_SERIAL;
+ else
+@@ -176,6 +233,7 @@ void __init bcm63xx_flash_detect(void)
+
+ int __init bcm63xx_flash_register(void)
+ {
++ struct device_node *np;
+ u32 val;
+
+ switch (flash_type) {
+@@ -195,8 +253,14 @@ int __init bcm63xx_flash_register(void)
+
+ return platform_device_register(&mtd_dev);
+ case BCM63XX_FLASH_TYPE_SERIAL:
+- pr_warn("unsupported serial flash detected\n");
+- return -ENODEV;
++ np = of_find_compatible_node(NULL, NULL, "jedec,spi-nor");
++ if (np) {
++ bcm63xx_of_update_spi_flash_speed(np, bcm63xx_spi_flash_info[0].max_speed_hz);
++ of_node_put(np);
++ return 0;
++ } else {
++ return -ENODEV;
++ }
+ case BCM63XX_FLASH_TYPE_NAND:
+ pr_warn("unsupported NAND flash detected\n");
+ return -ENODEV;
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+@@ -709,6 +709,7 @@
+ #define GPIO_STRAPBUS_REG 0x40
+ #define STRAPBUS_6358_BOOT_SEL_PARALLEL (1 << 1)
+ #define STRAPBUS_6358_BOOT_SEL_SERIAL (0 << 1)
++#define STRAPBUS_6368_SPI_CLK_FAST (1 << 6)
+ #define STRAPBUS_6368_BOOT_SEL_MASK 0x3
+ #define STRAPBUS_6368_BOOT_SEL_NAND 0
+ #define STRAPBUS_6368_BOOT_SEL_SERIAL 1
+@@ -1565,6 +1566,7 @@
+ #define IDDQ_CTRL_63268_USBH (1 << 4)
+
+ #define MISC_STRAPBUS_6328_REG 0x240
++#define STRAPBUS_6328_HSSPI_CLK_FAST (1 << 4)
+ #define STRAPBUS_6328_FCVO_SHIFT 7
+ #define STRAPBUS_6328_FCVO_MASK (0x1f << STRAPBUS_6328_FCVO_SHIFT)
+ #define STRAPBUS_6328_BOOT_SEL_SERIAL (1 << 28)
projects / openwrt / staging / chunkeey.git / blobdiff