e34018cc9e
Add support for the HSSPI controller found on bcm6328 and SPI attached flash. SVN-Revision: 31879
89 lines
2.8 KiB
Diff
89 lines
2.8 KiB
Diff
From a1e3ef9af3e3a7283ced5fd079ef7e8bc4e2deca Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jonas.gorski@gmail.com>
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Date: Sun, 3 Jul 2011 15:00:38 +0200
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Subject: [PATCH 55/79] MIPS: BCM63XX: Register SPI flash if present
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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---
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arch/mips/bcm63xx/dev-flash.c | 29 +++++++++++++++++++--
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arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h | 1 +
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2 files changed, 28 insertions(+), 2 deletions(-)
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--- a/arch/mips/bcm63xx/dev-flash.c
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+++ b/arch/mips/bcm63xx/dev-flash.c
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@@ -15,9 +15,12 @@
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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+#include <linux/spi/spi.h>
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+#include <linux/spi/flash.h>
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#include <bcm63xx_cpu.h>
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#include <bcm63xx_dev_flash.h>
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+#include <bcm63xx_dev_hsspi.h>
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#include <bcm63xx_regs.h>
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#include <bcm63xx_io.h>
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@@ -54,12 +57,28 @@ static struct platform_device mtd_dev =
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},
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};
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+static struct flash_platform_data bcm63xx_flash_data = {
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+ .part_probe_types = bcm63xx_part_types,
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+};
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+
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+static struct spi_board_info bcm63xx_spi_flash_info[] = {
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+ {
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+ .bus_num = 0,
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+ .chip_select = 0,
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+ .mode = 0,
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+ .max_speed_hz = 781000,
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+ .modalias = "m25p80",
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+ .platform_data = &bcm63xx_flash_data,
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+ },
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+};
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+
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static int __init bcm63xx_detect_flash_type(void)
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{
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u32 val;
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switch (bcm63xx_get_cpu_id()) {
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case BCM6328_CPU_ID:
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+ bcm63xx_spi_flash_info[0].max_speed_hz = 40000000;
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val = bcm_misc_readl(MISC_STRAPBUS_6328_REG);
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if (val & STRAPBUS_6328_BOOT_SEL_SERIAL)
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return BCM63XX_FLASH_TYPE_SERIAL;
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@@ -78,6 +97,9 @@ static int __init bcm63xx_detect_flash_t
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return BCM63XX_FLASH_TYPE_SERIAL;
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case BCM6368_CPU_ID:
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val = bcm_gpio_readl(GPIO_STRAPBUS_REG);
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+ if (val & STRAPBUS_6368_SPI_CLK_FAST)
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+ bcm63xx_spi_flash_info[0].max_speed_hz = 20000000;
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+
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switch (val & STRAPBUS_6368_BOOT_SEL_MASK) {
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case STRAPBUS_6368_BOOT_SEL_NAND:
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return BCM63XX_FLASH_TYPE_NAND;
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@@ -109,8 +131,11 @@ int __init bcm63xx_flash_register(void)
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return platform_device_register(&mtd_dev);
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case BCM63XX_FLASH_TYPE_SERIAL:
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- pr_warn("unsupported serial flash detected\n");
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- return -ENODEV;
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+ if (BCMCPU_IS_6328())
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+ bcm63xx_flash_data.max_transfer_len = HS_SPI_BUFFER_LEN;
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+
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+ return spi_register_board_info(bcm63xx_spi_flash_info,
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+ ARRAY_SIZE(bcm63xx_spi_flash_info));
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case BCM63XX_FLASH_TYPE_NAND:
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pr_warn("unsupported NAND flash detected\n");
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return -ENODEV;
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--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
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+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
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@@ -555,6 +555,7 @@
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#define GPIO_STRAPBUS_REG 0x40
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#define STRAPBUS_6358_BOOT_SEL_PARALLEL (1 << 1)
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#define STRAPBUS_6358_BOOT_SEL_SERIAL (0 << 1)
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+#define STRAPBUS_6368_SPI_CLK_FAST (1 << 6)
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#define STRAPBUS_6368_BOOT_SEL_MASK 0x3
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#define STRAPBUS_6368_BOOT_SEL_NAND 0
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#define STRAPBUS_6368_BOOT_SEL_SERIAL 1
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