-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
-@@ -708,6 +708,7 @@
- #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
-@@ -1564,6 +1565,7 @@
- #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 / wigyori.git / blobdiff