Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132/* * 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; } fallthrough; 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; }}