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From a1e3ef9af3e3a7283ced5fd079ef7e8bc4e2deca 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 55/79] MIPS: BCM63XX: Register SPI flash if present
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
arch/mips/bcm63xx/dev-flash.c | 29 +++++++++++++++++++--
arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h | 1 +
2 files changed, 28 insertions(+), 2 deletions(-)
--- a/arch/mips/bcm63xx/dev-flash.c
+++ b/arch/mips/bcm63xx/dev-flash.c
@@ -15,9 +15,12 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_dev_flash.h>
+#include <bcm63xx_dev_hsspi.h>
#include <bcm63xx_regs.h>
#include <bcm63xx_io.h>
@@ -54,12 +57,28 @@ static struct platform_device mtd_dev =
},
};
+static struct flash_platform_data bcm63xx_flash_data = {
+ .part_probe_types = bcm63xx_part_types,
+};
+
+static struct spi_board_info bcm63xx_spi_flash_info[] = {
+ {
+ .bus_num = 0,
+ .chip_select = 0,
+ .mode = 0,
+ .max_speed_hz = 781000,
+ .modalias = "m25p80",
+ .platform_data = &bcm63xx_flash_data,
+ },
+};
+
static int __init bcm63xx_detect_flash_type(void)
{
u32 val;
switch (bcm63xx_get_cpu_id()) {
case BCM6328_CPU_ID:
+ bcm63xx_spi_flash_info[0].max_speed_hz = 40000000;
val = bcm_misc_readl(MISC_STRAPBUS_6328_REG);
if (val & STRAPBUS_6328_BOOT_SEL_SERIAL)
return BCM63XX_FLASH_TYPE_SERIAL;
@@ -78,6 +97,9 @@ static int __init bcm63xx_detect_flash_t
return BCM63XX_FLASH_TYPE_SERIAL;
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;
@@ -109,8 +131,11 @@ 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;
+ if (BCMCPU_IS_6328())
+ bcm63xx_flash_data.max_transfer_len = HS_SPI_BUFFER_LEN;
+
+ return spi_register_board_info(bcm63xx_spi_flash_info,
+ ARRAY_SIZE(bcm63xx_spi_flash_info));
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
@@ -555,6 +555,7 @@
#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
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