2 * Broadcom BCM63xx flash registration
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
8 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
9 * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
10 * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
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>
20 #include <bcm63xx_cpu.h>
21 #include <bcm63xx_dev_flash.h>
22 #include <bcm63xx_regs.h>
23 #include <bcm63xx_io.h>
25 static struct mtd_partition mtd_partitions
[] = {
33 static const char *bcm63xx_part_types
[] = { "bcm63xxpart", NULL
};
35 static struct physmap_flash_data flash_data
= {
37 .parts
= mtd_partitions
,
38 .part_probe_types
= bcm63xx_part_types
,
41 static struct resource mtd_resources
[] = {
43 .start
= 0, /* filled at runtime */
44 .end
= 0, /* filled at runtime */
45 .flags
= IORESOURCE_MEM
,
49 static struct platform_device mtd_dev
= {
50 .name
= "physmap-flash",
51 .resource
= mtd_resources
,
52 .num_resources
= ARRAY_SIZE(mtd_resources
),
54 .platform_data
= &flash_data
,
58 static int __init
bcm63xx_detect_flash_type(void)
62 switch (bcm63xx_get_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
;
68 return BCM63XX_FLASH_TYPE_NAND
;
72 /* no way to auto detect so assume parallel */
73 return BCM63XX_FLASH_TYPE_PARALLEL
;
76 val
= bcm_gpio_readl(GPIO_STRAPBUS_REG
);
77 if (val
& STRAPBUS_6358_BOOT_SEL_PARALLEL
)
78 return BCM63XX_FLASH_TYPE_PARALLEL
;
80 return BCM63XX_FLASH_TYPE_SERIAL
;
82 val
= bcm_misc_readl(MISC_STRAPBUS_6362_REG
);
83 if (val
& STRAPBUS_6362_BOOT_SEL_SERIAL
)
84 return BCM63XX_FLASH_TYPE_SERIAL
;
86 return BCM63XX_FLASH_TYPE_NAND
;
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
;
103 int __init
bcm63xx_flash_register(void)
108 flash_type
= bcm63xx_detect_flash_type();
110 switch (flash_type
) {
111 case BCM63XX_FLASH_TYPE_PARALLEL
:
112 /* read base address of boot chip select (0) */
113 val
= bcm_mpi_readl(MPI_CSBASE_REG(0));
114 val
&= MPI_CSBASE_BASE_MASK
;
116 mtd_resources
[0].start
= val
;
117 mtd_resources
[0].end
= 0x1FFFFFFF;
119 return platform_device_register(&mtd_dev
);
120 case BCM63XX_FLASH_TYPE_SERIAL
:
121 pr_warn("unsupported serial flash detected\n");
123 case BCM63XX_FLASH_TYPE_NAND
:
124 pr_warn("unsupported NAND flash detected\n");
127 pr_err("flash detection failed for BCM%x: %d\n",
128 bcm63xx_get_cpu_id(), flash_type
);