98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
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* Ralink RT288x SoC platform device registration
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*
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* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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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/physmap.h>
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#include <asm/addrspace.h>
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#include <asm/mach-ralink/rt288x.h>
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#include <asm/mach-ralink/rt288x_regs.h>
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#include "devices.h"
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static struct resource rt288x_flash0_resources[] = {
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{
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.flags = IORESOURCE_MEM,
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.start = KSEG1ADDR(RT2880_FLASH0_BASE),
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.end = KSEG1ADDR(RT2880_FLASH0_BASE) +
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RT2880_FLASH0_SIZE - 1,
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},
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};
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static struct platform_device rt288x_flash0_device = {
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.name = "physmap-flash",
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.resource = rt288x_flash0_resources,
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.num_resources = ARRAY_SIZE(rt288x_flash0_resources),
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};
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static struct resource rt288x_flash1_resources[] = {
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{
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.flags = IORESOURCE_MEM,
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.start = KSEG1ADDR(RT2880_FLASH1_BASE),
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.end = KSEG1ADDR(RT2880_FLASH1_BASE) +
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RT2880_FLASH1_SIZE - 1,
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},
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};
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static struct platform_device rt288x_flash1_device = {
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.name = "physmap-flash",
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.resource = rt288x_flash1_resources,
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.num_resources = ARRAY_SIZE(rt288x_flash1_resources),
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};
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static int rt288x_flash_instance __initdata;
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void __init rt288x_register_flash(unsigned int id,
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struct physmap_flash_data *pdata)
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{
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struct platform_device *pdev;
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u32 t;
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int reg;
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switch (id) {
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case 0:
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pdev = &rt288x_flash0_device;
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reg = MEMC_REG_FLASH_CFG0;
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break;
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case 1:
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pdev = &rt288x_flash1_device;
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reg = MEMC_REG_FLASH_CFG1;
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break;
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default:
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return;
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}
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t = rt288x_memc_rr(reg);
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t = (t >> FLASH_CFG_WIDTH_SHIFT) & FLASH_CFG_WIDTH_MASK;
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switch (t) {
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case FLASH_CFG_WIDTH_8BIT:
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pdata->width = 1;
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break;
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case FLASH_CFG_WIDTH_16BIT:
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pdata->width = 2;
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break;
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case FLASH_CFG_WIDTH_32BIT:
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pdata->width = 4;
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break;
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default:
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printk(KERN_ERR "RT288x: flash bank%u witdh is invalid\n", id);
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return;
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}
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pdev->dev.platform_data = pdata;
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pdev->id = rt288x_flash_instance;
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platform_device_register(pdev);
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rt288x_flash_instance++;
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}
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