131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/*
|
|
* Broadcom BCM63xx flash registration
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
|
|
* Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
|
|
* Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <linux/mtd/physmap.h>
|
|
|
|
#include <bcm63xx_cpu.h>
|
|
#include <bcm63xx_dev_flash.h>
|
|
#include <bcm63xx_regs.h>
|
|
#include <bcm63xx_io.h>
|
|
|
|
static struct mtd_partition mtd_partitions[] = {
|
|
{
|
|
.name = "cfe",
|
|
.offset = 0x0,
|
|
.size = 0x40000,
|
|
}
|
|
};
|
|
|
|
static const char *bcm63xx_part_types[] = { "bcm63xxpart", NULL };
|
|
|
|
static struct physmap_flash_data flash_data = {
|
|
.width = 2,
|
|
.parts = mtd_partitions,
|
|
.part_probe_types = bcm63xx_part_types,
|
|
};
|
|
|
|
static struct resource mtd_resources[] = {
|
|
{
|
|
.start = 0, /* filled at runtime */
|
|
.end = 0, /* filled at runtime */
|
|
.flags = IORESOURCE_MEM,
|
|
}
|
|
};
|
|
|
|
static struct platform_device mtd_dev = {
|
|
.name = "physmap-flash",
|
|
.resource = mtd_resources,
|
|
.num_resources = ARRAY_SIZE(mtd_resources),
|
|
.dev = {
|
|
.platform_data = &flash_data,
|
|
},
|
|
};
|
|
|
|
static int __init bcm63xx_detect_flash_type(void)
|
|
{
|
|
u32 val;
|
|
|
|
switch (bcm63xx_get_cpu_id()) {
|
|
case BCM6328_CPU_ID:
|
|
val = bcm_misc_readl(MISC_STRAPBUS_6328_REG);
|
|
if (val & STRAPBUS_6328_BOOT_SEL_SERIAL)
|
|
return BCM63XX_FLASH_TYPE_SERIAL;
|
|
else
|
|
return BCM63XX_FLASH_TYPE_NAND;
|
|
case BCM6338_CPU_ID:
|
|
case BCM6345_CPU_ID:
|
|
case BCM6348_CPU_ID:
|
|
/* no way to auto detect so assume parallel */
|
|
return BCM63XX_FLASH_TYPE_PARALLEL;
|
|
case BCM3368_CPU_ID:
|
|
case BCM6358_CPU_ID:
|
|
val = bcm_gpio_readl(GPIO_STRAPBUS_REG);
|
|
if (val & STRAPBUS_6358_BOOT_SEL_PARALLEL)
|
|
return BCM63XX_FLASH_TYPE_PARALLEL;
|
|
else
|
|
return BCM63XX_FLASH_TYPE_SERIAL;
|
|
case BCM6362_CPU_ID:
|
|
val = bcm_misc_readl(MISC_STRAPBUS_6362_REG);
|
|
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);
|
|
switch (val & STRAPBUS_6368_BOOT_SEL_MASK) {
|
|
case STRAPBUS_6368_BOOT_SEL_NAND:
|
|
return BCM63XX_FLASH_TYPE_NAND;
|
|
case STRAPBUS_6368_BOOT_SEL_SERIAL:
|
|
return BCM63XX_FLASH_TYPE_SERIAL;
|
|
case STRAPBUS_6368_BOOT_SEL_PARALLEL:
|
|
return BCM63XX_FLASH_TYPE_PARALLEL;
|
|
}
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
int __init bcm63xx_flash_register(void)
|
|
{
|
|
int flash_type;
|
|
u32 val;
|
|
|
|
flash_type = bcm63xx_detect_flash_type();
|
|
|
|
switch (flash_type) {
|
|
case BCM63XX_FLASH_TYPE_PARALLEL:
|
|
/* read base address of boot chip select (0) */
|
|
val = bcm_mpi_readl(MPI_CSBASE_REG(0));
|
|
val &= MPI_CSBASE_BASE_MASK;
|
|
|
|
mtd_resources[0].start = val;
|
|
mtd_resources[0].end = 0x1FFFFFFF;
|
|
|
|
return platform_device_register(&mtd_dev);
|
|
case BCM63XX_FLASH_TYPE_SERIAL:
|
|
pr_warn("unsupported serial flash detected\n");
|
|
return -ENODEV;
|
|
case BCM63XX_FLASH_TYPE_NAND:
|
|
pr_warn("unsupported NAND flash detected\n");
|
|
return -ENODEV;
|
|
default:
|
|
pr_err("flash detection failed for BCM%x: %d\n",
|
|
bcm63xx_get_cpu_id(), flash_type);
|
|
return -ENODEV;
|
|
}
|
|
}
|