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131 lines
3.3 KiB
131 lines
3.3 KiB
/* |
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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 <[email protected]> |
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* Copyright (C) 2008 Florian Fainelli <[email protected]> |
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* Copyright (C) 2012 Jonas Gorski <[email protected]> |
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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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