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7b9334215f
The Broadcom BCM3368 Cable Modem SoC is extremely similar to the existing BCM63xx DSL SoCs, in particular BCM6358, therefore little effort in the existing code base is required to get it supported. This patch adds support for the following on-chip peripherals: - two UARTS - GPIO - Ethernet - SPI - PCI - NOR Flash The most noticeable difference with 3368 is that it has its peripheral register at 0xfff8_0000 we check that separately in ioremap.h. Since 3368 is identical to 6358 for its clock and reset bits, we use them verbatim. Signed-off-by: Florian Fainelli <florian@openwrt.org> Cc: linux-mips@linux-mips.org Cc: cernekee@gmail.com Cc: jogo@openwrt.org Patchwork: https://patchwork.linux-mips.org/patch/5499/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
131 lines
3.2 KiB
C
131 lines
3.2 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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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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