132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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* Broadcom BCM63xx flash registration
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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* Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
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* Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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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 <bcm63xx_cpu.h>
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#include <bcm63xx_dev_flash.h>
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#include <bcm63xx_regs.h>
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#include <bcm63xx_io.h>
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static struct mtd_partition mtd_partitions[] = {
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{
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.name = "cfe",
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.offset = 0x0,
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.size = 0x40000,
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}
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};
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static const char *bcm63xx_part_types[] = { "bcm63xxpart", NULL };
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static struct physmap_flash_data flash_data = {
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.width = 2,
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.parts = mtd_partitions,
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.part_probe_types = bcm63xx_part_types,
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};
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static struct resource mtd_resources[] = {
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{
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.start = 0, /* filled at runtime */
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.end = 0, /* filled at runtime */
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.flags = IORESOURCE_MEM,
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}
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};
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static struct platform_device mtd_dev = {
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.name = "physmap-flash",
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.resource = mtd_resources,
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.num_resources = ARRAY_SIZE(mtd_resources),
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.dev = {
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.platform_data = &flash_data,
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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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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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else
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return BCM63XX_FLASH_TYPE_NAND;
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case BCM6338_CPU_ID:
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case BCM6345_CPU_ID:
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case BCM6348_CPU_ID:
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/* no way to auto detect so assume parallel */
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return BCM63XX_FLASH_TYPE_PARALLEL;
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case BCM3368_CPU_ID:
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case BCM6358_CPU_ID:
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val = bcm_gpio_readl(GPIO_STRAPBUS_REG);
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if (val & STRAPBUS_6358_BOOT_SEL_PARALLEL)
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return BCM63XX_FLASH_TYPE_PARALLEL;
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else
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return BCM63XX_FLASH_TYPE_SERIAL;
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case BCM6362_CPU_ID:
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val = bcm_misc_readl(MISC_STRAPBUS_6362_REG);
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if (val & STRAPBUS_6362_BOOT_SEL_SERIAL)
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return BCM63XX_FLASH_TYPE_SERIAL;
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else
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return BCM63XX_FLASH_TYPE_NAND;
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case BCM6368_CPU_ID:
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val = bcm_gpio_readl(GPIO_STRAPBUS_REG);
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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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case STRAPBUS_6368_BOOT_SEL_SERIAL:
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return BCM63XX_FLASH_TYPE_SERIAL;
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case STRAPBUS_6368_BOOT_SEL_PARALLEL:
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return BCM63XX_FLASH_TYPE_PARALLEL;
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}
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fallthrough;
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default:
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return -EINVAL;
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}
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}
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int __init bcm63xx_flash_register(void)
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{
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int flash_type;
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u32 val;
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flash_type = bcm63xx_detect_flash_type();
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switch (flash_type) {
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case BCM63XX_FLASH_TYPE_PARALLEL:
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/* read base address of boot chip select (0) */
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val = bcm_mpi_readl(MPI_CSBASE_REG(0));
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val &= MPI_CSBASE_BASE_MASK;
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mtd_resources[0].start = val;
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mtd_resources[0].end = 0x1FFFFFFF;
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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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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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default:
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pr_err("flash detection failed for BCM%x: %d\n",
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bcm63xx_get_cpu_id(), flash_type);
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return -ENODEV;
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}
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}
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