projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4b897d54 JG |
1 | /* |
| 2 | * Broadcom BCM63xx flash registration | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | * | |
| 8 | * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> | |
| 9 | * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org> | |
| aaf3fedb | 10 | * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com> |
| 4b897d54 JG |
11 | */ |
| 12 | ||
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/platform_device.h> | |
| 16 | #include <linux/mtd/mtd.h> | |
| 17 | #include <linux/mtd/partitions.h> | |
| 18 | #include <linux/mtd/physmap.h> | |
| 19 | ||
| 20 | #include <bcm63xx_cpu.h> | |
| 21 | #include <bcm63xx_dev_flash.h> | |
| 22 | #include <bcm63xx_regs.h> | |
| 23 | #include <bcm63xx_io.h> | |
| 24 | ||
| 25 | static struct mtd_partition mtd_partitions[] = { | |
| 26 | { | |
| 27 | .name = "cfe", | |
| 28 | .offset = 0x0, | |
| 29 | .size = 0x40000, | |
| 30 | } | |
| 31 | }; | |
| 32 | ||
| 33 | static const char *bcm63xx_part_types[] = { "bcm63xxpart", NULL }; | |
| 34 | ||
| 35 | static struct physmap_flash_data flash_data = { | |
| 36 | .width = 2, | |
| 37 | .parts = mtd_partitions, | |
| 38 | .part_probe_types = bcm63xx_part_types, | |
| 39 | }; | |
| 40 | ||
| 41 | static struct resource mtd_resources[] = { | |
| 42 | { | |
| 43 | .start = 0, /* filled at runtime */ | |
| 44 | .end = 0, /* filled at runtime */ | |
| 45 | .flags = IORESOURCE_MEM, | |
| 46 | } | |
| 47 | }; | |
| 48 | ||
| 49 | static struct platform_device mtd_dev = { | |
| 50 | .name = "physmap-flash", | |
| 51 | .resource = mtd_resources, | |
| 52 | .num_resources = ARRAY_SIZE(mtd_resources), | |
| 53 | .dev = { | |
| 54 | .platform_data = &flash_data, | |
| 55 | }, | |
| 56 | }; | |
| 57 | ||
| aaf3fedb JG |
58 | static int __init bcm63xx_detect_flash_type(void) |
| 59 | { | |
| 60 | u32 val; | |
| 61 | ||
| 62 | switch (bcm63xx_get_cpu_id()) { | |
| e5766aea JG |
63 | case BCM6328_CPU_ID: |
| 64 | val = bcm_misc_readl(MISC_STRAPBUS_6328_REG); | |
| 65 | if (val & STRAPBUS_6328_BOOT_SEL_SERIAL) | |
| 66 | return BCM63XX_FLASH_TYPE_SERIAL; | |
| 67 | else | |
| 68 | return BCM63XX_FLASH_TYPE_NAND; | |
| aaf3fedb JG |
69 | case BCM6338_CPU_ID: |
| 70 | case BCM6345_CPU_ID: | |
| 71 | case BCM6348_CPU_ID: | |
| 72 | /* no way to auto detect so assume parallel */ | |
| 73 | return BCM63XX_FLASH_TYPE_PARALLEL; | |
| 7b933421 | 74 | case BCM3368_CPU_ID: |
| aaf3fedb JG |
75 | case BCM6358_CPU_ID: |
| 76 | val = bcm_gpio_readl(GPIO_STRAPBUS_REG); | |
| 77 | if (val & STRAPBUS_6358_BOOT_SEL_PARALLEL) | |
| 78 | return BCM63XX_FLASH_TYPE_PARALLEL; | |
| 79 | else | |
| 80 | return BCM63XX_FLASH_TYPE_SERIAL; | |
| ab8ed982 JG |
81 | case BCM6362_CPU_ID: |
| 82 | val = bcm_misc_readl(MISC_STRAPBUS_6362_REG); | |
| 83 | if (val & STRAPBUS_6362_BOOT_SEL_SERIAL) | |
| 84 | return BCM63XX_FLASH_TYPE_SERIAL; | |
| 85 | else | |
| 86 | return BCM63XX_FLASH_TYPE_NAND; | |
| aaf3fedb JG |
87 | case BCM6368_CPU_ID: |
| 88 | val = bcm_gpio_readl(GPIO_STRAPBUS_REG); | |
| 89 | switch (val & STRAPBUS_6368_BOOT_SEL_MASK) { | |
| 90 | case STRAPBUS_6368_BOOT_SEL_NAND: | |
| 91 | return BCM63XX_FLASH_TYPE_NAND; | |
| 92 | case STRAPBUS_6368_BOOT_SEL_SERIAL: | |
| 93 | return BCM63XX_FLASH_TYPE_SERIAL; | |
| 94 | case STRAPBUS_6368_BOOT_SEL_PARALLEL: | |
| 95 | return BCM63XX_FLASH_TYPE_PARALLEL; | |
| 96 | } | |
| 97 | default: | |
| 98 | return -EINVAL; | |
| 99 | } | |
| 100 | } | |
| 101 | ||
| 4b897d54 JG |
102 | int __init bcm63xx_flash_register(void) |
| 103 | { | |
| aaf3fedb | 104 | int flash_type; |
| 4b897d54 JG |
105 | u32 val; |
| 106 | ||
| aaf3fedb | 107 | flash_type = bcm63xx_detect_flash_type(); |
| 4b897d54 | 108 | |
| aaf3fedb JG |
109 | switch (flash_type) { |
| 110 | case BCM63XX_FLASH_TYPE_PARALLEL: | |
| 111 | /* read base address of boot chip select (0) */ | |
| 112 | val = bcm_mpi_readl(MPI_CSBASE_REG(0)); | |
| 113 | val &= MPI_CSBASE_BASE_MASK; | |
| 4b897d54 | 114 | |
| aaf3fedb JG |
115 | mtd_resources[0].start = val; |
| 116 | mtd_resources[0].end = 0x1FFFFFFF; | |
| 117 | ||
| 118 | return platform_device_register(&mtd_dev); | |
| 119 | case BCM63XX_FLASH_TYPE_SERIAL: | |
| 120 | pr_warn("unsupported serial flash detected\n"); | |
| 121 | return -ENODEV; | |
| 122 | case BCM63XX_FLASH_TYPE_NAND: | |
| 123 | pr_warn("unsupported NAND flash detected\n"); | |
| 124 | return -ENODEV; | |
| 125 | default: | |
| 126 | pr_err("flash detection failed for BCM%x: %d\n", | |
| 127 | bcm63xx_get_cpu_id(), flash_type); | |
| 128 | return -ENODEV; | |
| 129 | } | |
| 4b897d54 | 130 | } |