1005 lines
28 KiB
C
1005 lines
28 KiB
C
/*
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* arch/arm/mach-ep93xx/core.c
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* Core routines for Cirrus EP93xx chips.
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*
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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* Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
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*
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* Thanks go to Michael Burian and Ray Lehtiniemi for their key
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* role in the ep93xx linux community.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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#include <linux/sys_soc.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/termios.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/serial.h>
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#include <linux/mtd/physmap.h>
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#include <linux/i2c.h>
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#include <linux/gpio/machine.h>
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#include <linux/spi/spi.h>
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#include <linux/export.h>
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#include <linux/irqchip/arm-vic.h>
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#include <linux/reboot.h>
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#include <linux/usb/ohci_pdriver.h>
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#include <linux/random.h>
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#include <mach/hardware.h>
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#include <linux/platform_data/video-ep93xx.h>
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#include <linux/platform_data/keypad-ep93xx.h>
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#include <linux/platform_data/spi-ep93xx.h>
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#include <mach/gpio-ep93xx.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "soc.h"
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/*************************************************************************
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* Static I/O mappings that are needed for all EP93xx platforms
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*************************************************************************/
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static struct map_desc ep93xx_io_desc[] __initdata = {
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{
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.virtual = EP93XX_AHB_VIRT_BASE,
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.pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
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.length = EP93XX_AHB_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = EP93XX_APB_VIRT_BASE,
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.pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
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.length = EP93XX_APB_SIZE,
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.type = MT_DEVICE,
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},
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};
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void __init ep93xx_map_io(void)
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{
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iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
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}
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/*************************************************************************
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* EP93xx IRQ handling
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*************************************************************************/
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void __init ep93xx_init_irq(void)
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{
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vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
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vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
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}
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/*************************************************************************
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* EP93xx System Controller Software Locked register handling
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*************************************************************************/
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/*
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* syscon_swlock prevents anything else from writing to the syscon
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* block while a software locked register is being written.
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*/
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static DEFINE_SPINLOCK(syscon_swlock);
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void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
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{
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unsigned long flags;
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spin_lock_irqsave(&syscon_swlock, flags);
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__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
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__raw_writel(val, reg);
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spin_unlock_irqrestore(&syscon_swlock, flags);
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}
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void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
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{
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unsigned long flags;
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unsigned int val;
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spin_lock_irqsave(&syscon_swlock, flags);
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val = __raw_readl(EP93XX_SYSCON_DEVCFG);
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val &= ~clear_bits;
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val |= set_bits;
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__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
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__raw_writel(val, EP93XX_SYSCON_DEVCFG);
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spin_unlock_irqrestore(&syscon_swlock, flags);
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}
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/**
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* ep93xx_chip_revision() - returns the EP93xx chip revision
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*
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* See <mach/platform.h> for more information.
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*/
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unsigned int ep93xx_chip_revision(void)
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{
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unsigned int v;
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v = __raw_readl(EP93XX_SYSCON_SYSCFG);
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v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
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v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
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return v;
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}
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EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
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/*************************************************************************
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* EP93xx GPIO
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*************************************************************************/
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static struct resource ep93xx_gpio_resource[] = {
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DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
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};
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static struct platform_device ep93xx_gpio_device = {
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.name = "gpio-ep93xx",
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.id = -1,
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.num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
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.resource = ep93xx_gpio_resource,
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};
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/*************************************************************************
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* EP93xx peripheral handling
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*************************************************************************/
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#define EP93XX_UART_MCR_OFFSET (0x0100)
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static void ep93xx_uart_set_mctrl(struct amba_device *dev,
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void __iomem *base, unsigned int mctrl)
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{
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unsigned int mcr;
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mcr = 0;
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if (mctrl & TIOCM_RTS)
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mcr |= 2;
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if (mctrl & TIOCM_DTR)
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mcr |= 1;
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__raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
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}
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static struct amba_pl010_data ep93xx_uart_data = {
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.set_mctrl = ep93xx_uart_set_mctrl,
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};
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static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
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{ IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
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static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
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{ IRQ_EP93XX_UART2 }, NULL);
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static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
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{ IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
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static struct resource ep93xx_rtc_resource[] = {
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DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
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};
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static struct platform_device ep93xx_rtc_device = {
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.name = "ep93xx-rtc",
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.id = -1,
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.num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
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.resource = ep93xx_rtc_resource,
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};
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/*************************************************************************
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* EP93xx OHCI USB Host
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*************************************************************************/
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static struct clk *ep93xx_ohci_host_clock;
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static int ep93xx_ohci_power_on(struct platform_device *pdev)
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{
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if (!ep93xx_ohci_host_clock) {
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ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(ep93xx_ohci_host_clock))
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return PTR_ERR(ep93xx_ohci_host_clock);
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}
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return clk_enable(ep93xx_ohci_host_clock);
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}
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static void ep93xx_ohci_power_off(struct platform_device *pdev)
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{
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clk_disable(ep93xx_ohci_host_clock);
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}
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static struct usb_ohci_pdata ep93xx_ohci_pdata = {
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.power_on = ep93xx_ohci_power_on,
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.power_off = ep93xx_ohci_power_off,
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.power_suspend = ep93xx_ohci_power_off,
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};
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static struct resource ep93xx_ohci_resources[] = {
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DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
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DEFINE_RES_IRQ(IRQ_EP93XX_USB),
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};
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static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
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static struct platform_device ep93xx_ohci_device = {
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.name = "ohci-platform",
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.id = -1,
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.num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
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.resource = ep93xx_ohci_resources,
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.dev = {
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.dma_mask = &ep93xx_ohci_dma_mask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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.platform_data = &ep93xx_ohci_pdata,
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},
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};
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/*************************************************************************
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* EP93xx physmap'ed flash
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*************************************************************************/
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static struct physmap_flash_data ep93xx_flash_data;
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static struct resource ep93xx_flash_resource = {
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device ep93xx_flash = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &ep93xx_flash_data,
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},
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.num_resources = 1,
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.resource = &ep93xx_flash_resource,
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};
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/**
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* ep93xx_register_flash() - Register the external flash device.
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* @width: bank width in octets
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* @start: resource start address
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* @size: resource size
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*/
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void __init ep93xx_register_flash(unsigned int width,
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resource_size_t start, resource_size_t size)
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{
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ep93xx_flash_data.width = width;
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ep93xx_flash_resource.start = start;
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ep93xx_flash_resource.end = start + size - 1;
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platform_device_register(&ep93xx_flash);
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}
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/*************************************************************************
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* EP93xx ethernet peripheral handling
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*************************************************************************/
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static struct ep93xx_eth_data ep93xx_eth_data;
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static struct resource ep93xx_eth_resource[] = {
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DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
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DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
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};
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static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
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static struct platform_device ep93xx_eth_device = {
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.name = "ep93xx-eth",
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.id = -1,
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.dev = {
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.platform_data = &ep93xx_eth_data,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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.dma_mask = &ep93xx_eth_dma_mask,
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},
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.num_resources = ARRAY_SIZE(ep93xx_eth_resource),
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.resource = ep93xx_eth_resource,
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};
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/**
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* ep93xx_register_eth - Register the built-in ethernet platform device.
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* @data: platform specific ethernet configuration (__initdata)
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* @copy_addr: flag indicating that the MAC address should be copied
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* from the IndAd registers (as programmed by the bootloader)
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*/
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void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
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{
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if (copy_addr)
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memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
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ep93xx_eth_data = *data;
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platform_device_register(&ep93xx_eth_device);
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}
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/*************************************************************************
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* EP93xx i2c peripheral handling
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*************************************************************************/
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/* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
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static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
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.dev_id = "i2c-gpio.0",
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.table = {
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/* Use local offsets on gpiochip/port "G" */
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GPIO_LOOKUP_IDX("G", 1, NULL, 0,
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GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
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GPIO_LOOKUP_IDX("G", 0, NULL, 1,
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GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
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},
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};
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static struct platform_device ep93xx_i2c_device = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = NULL,
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},
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};
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/**
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* ep93xx_register_i2c - Register the i2c platform device.
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* @devices: platform specific i2c bus device information (__initdata)
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* @num: the number of devices on the i2c bus
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*/
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void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
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{
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/*
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* FIXME: this just sets the two pins as non-opendrain, as no
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* platforms tries to do that anyway. Flag the applicable lines
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* as open drain in the GPIO_LOOKUP above and the driver or
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* gpiolib will handle open drain/open drain emulation as need
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* be. Right now i2c-gpio emulates open drain which is not
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* optimal.
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*/
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__raw_writel((0 << 1) | (0 << 0),
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EP93XX_GPIO_EEDRIVE);
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i2c_register_board_info(0, devices, num);
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gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
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platform_device_register(&ep93xx_i2c_device);
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}
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/*************************************************************************
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* EP93xx SPI peripheral handling
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*************************************************************************/
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static struct ep93xx_spi_info ep93xx_spi_master_data;
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static struct resource ep93xx_spi_resources[] = {
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DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
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DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
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};
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static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
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static struct platform_device ep93xx_spi_device = {
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.name = "ep93xx-spi",
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.id = 0,
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.dev = {
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.platform_data = &ep93xx_spi_master_data,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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.dma_mask = &ep93xx_spi_dma_mask,
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},
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.num_resources = ARRAY_SIZE(ep93xx_spi_resources),
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.resource = ep93xx_spi_resources,
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};
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/**
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* ep93xx_register_spi() - registers spi platform device
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* @info: ep93xx board specific spi master info (__initdata)
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* @devices: SPI devices to register (__initdata)
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* @num: number of SPI devices to register
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*
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* This function registers platform device for the EP93xx SPI controller and
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* also makes sure that SPI pins are muxed so that I2S is not using those pins.
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*/
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void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
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struct spi_board_info *devices, int num)
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{
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/*
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* When SPI is used, we need to make sure that I2S is muxed off from
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* SPI pins.
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*/
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ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
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ep93xx_spi_master_data = *info;
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spi_register_board_info(devices, num);
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platform_device_register(&ep93xx_spi_device);
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}
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/*************************************************************************
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* EP93xx LEDs
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*************************************************************************/
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static const struct gpio_led ep93xx_led_pins[] __initconst = {
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{
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.name = "platform:grled",
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.gpio = EP93XX_GPIO_LINE_GRLED,
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}, {
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.name = "platform:rdled",
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.gpio = EP93XX_GPIO_LINE_RDLED,
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},
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};
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static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
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.num_leds = ARRAY_SIZE(ep93xx_led_pins),
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.leds = ep93xx_led_pins,
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};
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/*************************************************************************
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* EP93xx pwm peripheral handling
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*************************************************************************/
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static struct resource ep93xx_pwm0_resource[] = {
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DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
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};
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static struct platform_device ep93xx_pwm0_device = {
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.name = "ep93xx-pwm",
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.id = 0,
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.num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
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.resource = ep93xx_pwm0_resource,
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};
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static struct resource ep93xx_pwm1_resource[] = {
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DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
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};
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static struct platform_device ep93xx_pwm1_device = {
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.name = "ep93xx-pwm",
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.id = 1,
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.num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
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.resource = ep93xx_pwm1_resource,
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};
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void __init ep93xx_register_pwm(int pwm0, int pwm1)
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{
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if (pwm0)
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platform_device_register(&ep93xx_pwm0_device);
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/* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
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if (pwm1)
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platform_device_register(&ep93xx_pwm1_device);
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}
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int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
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{
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int err;
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if (pdev->id == 0) {
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err = 0;
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} else if (pdev->id == 1) {
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err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
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dev_name(&pdev->dev));
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if (err)
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return err;
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err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
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if (err)
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goto fail;
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/* PWM 1 output on EGPIO[14] */
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ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
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} else {
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err = -ENODEV;
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}
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return err;
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fail:
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gpio_free(EP93XX_GPIO_LINE_EGPIO14);
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return err;
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}
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EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
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void ep93xx_pwm_release_gpio(struct platform_device *pdev)
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{
|
|
if (pdev->id == 1) {
|
|
gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
|
|
gpio_free(EP93XX_GPIO_LINE_EGPIO14);
|
|
|
|
/* EGPIO[14] used for GPIO */
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
|
|
|
|
|
|
/*************************************************************************
|
|
* EP93xx video peripheral handling
|
|
*************************************************************************/
|
|
static struct ep93xxfb_mach_info ep93xxfb_data;
|
|
|
|
static struct resource ep93xx_fb_resource[] = {
|
|
DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
|
|
};
|
|
|
|
static struct platform_device ep93xx_fb_device = {
|
|
.name = "ep93xx-fb",
|
|
.id = -1,
|
|
.dev = {
|
|
.platform_data = &ep93xxfb_data,
|
|
.coherent_dma_mask = DMA_BIT_MASK(32),
|
|
.dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
|
|
},
|
|
.num_resources = ARRAY_SIZE(ep93xx_fb_resource),
|
|
.resource = ep93xx_fb_resource,
|
|
};
|
|
|
|
/* The backlight use a single register in the framebuffer's register space */
|
|
#define EP93XX_RASTER_REG_BRIGHTNESS 0x20
|
|
|
|
static struct resource ep93xx_bl_resources[] = {
|
|
DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
|
|
EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
|
|
};
|
|
|
|
static struct platform_device ep93xx_bl_device = {
|
|
.name = "ep93xx-bl",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(ep93xx_bl_resources),
|
|
.resource = ep93xx_bl_resources,
|
|
};
|
|
|
|
/**
|
|
* ep93xx_register_fb - Register the framebuffer platform device.
|
|
* @data: platform specific framebuffer configuration (__initdata)
|
|
*/
|
|
void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
|
|
{
|
|
ep93xxfb_data = *data;
|
|
platform_device_register(&ep93xx_fb_device);
|
|
platform_device_register(&ep93xx_bl_device);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
* EP93xx matrix keypad peripheral handling
|
|
*************************************************************************/
|
|
static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
|
|
|
|
static struct resource ep93xx_keypad_resource[] = {
|
|
DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
|
|
DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
|
|
};
|
|
|
|
static struct platform_device ep93xx_keypad_device = {
|
|
.name = "ep93xx-keypad",
|
|
.id = -1,
|
|
.dev = {
|
|
.platform_data = &ep93xx_keypad_data,
|
|
},
|
|
.num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
|
|
.resource = ep93xx_keypad_resource,
|
|
};
|
|
|
|
/**
|
|
* ep93xx_register_keypad - Register the keypad platform device.
|
|
* @data: platform specific keypad configuration (__initdata)
|
|
*/
|
|
void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
|
|
{
|
|
ep93xx_keypad_data = *data;
|
|
platform_device_register(&ep93xx_keypad_device);
|
|
}
|
|
|
|
int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
|
|
{
|
|
int err;
|
|
int i;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
|
|
if (err)
|
|
goto fail_gpio_c;
|
|
err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
|
|
if (err)
|
|
goto fail_gpio_d;
|
|
}
|
|
|
|
/* Enable the keypad controller; GPIO ports C and D used for keypad */
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
|
|
EP93XX_SYSCON_DEVCFG_GONK);
|
|
|
|
return 0;
|
|
|
|
fail_gpio_d:
|
|
gpio_free(EP93XX_GPIO_LINE_C(i));
|
|
fail_gpio_c:
|
|
for (--i; i >= 0; --i) {
|
|
gpio_free(EP93XX_GPIO_LINE_C(i));
|
|
gpio_free(EP93XX_GPIO_LINE_D(i));
|
|
}
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
|
|
|
|
void ep93xx_keypad_release_gpio(struct platform_device *pdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
gpio_free(EP93XX_GPIO_LINE_C(i));
|
|
gpio_free(EP93XX_GPIO_LINE_D(i));
|
|
}
|
|
|
|
/* Disable the keypad controller; GPIO ports C and D used for GPIO */
|
|
ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
|
|
EP93XX_SYSCON_DEVCFG_GONK);
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
|
|
|
|
/*************************************************************************
|
|
* EP93xx I2S audio peripheral handling
|
|
*************************************************************************/
|
|
static struct resource ep93xx_i2s_resource[] = {
|
|
DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
|
|
DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
|
|
};
|
|
|
|
static struct platform_device ep93xx_i2s_device = {
|
|
.name = "ep93xx-i2s",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
|
|
.resource = ep93xx_i2s_resource,
|
|
};
|
|
|
|
static struct platform_device ep93xx_pcm_device = {
|
|
.name = "ep93xx-pcm-audio",
|
|
.id = -1,
|
|
};
|
|
|
|
void __init ep93xx_register_i2s(void)
|
|
{
|
|
platform_device_register(&ep93xx_i2s_device);
|
|
platform_device_register(&ep93xx_pcm_device);
|
|
}
|
|
|
|
#define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
|
|
EP93XX_SYSCON_DEVCFG_I2SONAC97)
|
|
|
|
#define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
|
|
EP93XX_SYSCON_I2SCLKDIV_SPOL)
|
|
|
|
int ep93xx_i2s_acquire(void)
|
|
{
|
|
unsigned val;
|
|
|
|
ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
|
|
EP93XX_SYSCON_DEVCFG_I2S_MASK);
|
|
|
|
/*
|
|
* This is potentially racy with the clock api for i2s_mclk, sclk and
|
|
* lrclk. Since the i2s driver is the only user of those clocks we
|
|
* rely on it to prevent parallel use of this function and the
|
|
* clock api for the i2s clocks.
|
|
*/
|
|
val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
|
|
val &= ~EP93XX_I2SCLKDIV_MASK;
|
|
val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
|
|
ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_i2s_acquire);
|
|
|
|
void ep93xx_i2s_release(void)
|
|
{
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_i2s_release);
|
|
|
|
/*************************************************************************
|
|
* EP93xx AC97 audio peripheral handling
|
|
*************************************************************************/
|
|
static struct resource ep93xx_ac97_resources[] = {
|
|
DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
|
|
DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
|
|
};
|
|
|
|
static struct platform_device ep93xx_ac97_device = {
|
|
.name = "ep93xx-ac97",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
|
|
.resource = ep93xx_ac97_resources,
|
|
};
|
|
|
|
void __init ep93xx_register_ac97(void)
|
|
{
|
|
/*
|
|
* Make sure that the AC97 pins are not used by I2S.
|
|
*/
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
|
|
|
|
platform_device_register(&ep93xx_ac97_device);
|
|
platform_device_register(&ep93xx_pcm_device);
|
|
}
|
|
|
|
/*************************************************************************
|
|
* EP93xx Watchdog
|
|
*************************************************************************/
|
|
static struct resource ep93xx_wdt_resources[] = {
|
|
DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
|
|
};
|
|
|
|
static struct platform_device ep93xx_wdt_device = {
|
|
.name = "ep93xx-wdt",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(ep93xx_wdt_resources),
|
|
.resource = ep93xx_wdt_resources,
|
|
};
|
|
|
|
/*************************************************************************
|
|
* EP93xx IDE
|
|
*************************************************************************/
|
|
static struct resource ep93xx_ide_resources[] = {
|
|
DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
|
|
DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
|
|
};
|
|
|
|
static struct platform_device ep93xx_ide_device = {
|
|
.name = "ep93xx-ide",
|
|
.id = -1,
|
|
.dev = {
|
|
.dma_mask = &ep93xx_ide_device.dev.coherent_dma_mask,
|
|
.coherent_dma_mask = DMA_BIT_MASK(32),
|
|
},
|
|
.num_resources = ARRAY_SIZE(ep93xx_ide_resources),
|
|
.resource = ep93xx_ide_resources,
|
|
};
|
|
|
|
void __init ep93xx_register_ide(void)
|
|
{
|
|
platform_device_register(&ep93xx_ide_device);
|
|
}
|
|
|
|
int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
|
|
{
|
|
int err;
|
|
int i;
|
|
|
|
err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
|
|
if (err)
|
|
return err;
|
|
err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
|
|
if (err)
|
|
goto fail_egpio15;
|
|
for (i = 2; i < 8; i++) {
|
|
err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
|
|
if (err)
|
|
goto fail_gpio_e;
|
|
}
|
|
for (i = 4; i < 8; i++) {
|
|
err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
|
|
if (err)
|
|
goto fail_gpio_g;
|
|
}
|
|
for (i = 0; i < 8; i++) {
|
|
err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
|
|
if (err)
|
|
goto fail_gpio_h;
|
|
}
|
|
|
|
/* GPIO ports E[7:2], G[7:4] and H used by IDE */
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
|
|
EP93XX_SYSCON_DEVCFG_GONIDE |
|
|
EP93XX_SYSCON_DEVCFG_HONIDE);
|
|
return 0;
|
|
|
|
fail_gpio_h:
|
|
for (--i; i >= 0; --i)
|
|
gpio_free(EP93XX_GPIO_LINE_H(i));
|
|
i = 8;
|
|
fail_gpio_g:
|
|
for (--i; i >= 4; --i)
|
|
gpio_free(EP93XX_GPIO_LINE_G(i));
|
|
i = 8;
|
|
fail_gpio_e:
|
|
for (--i; i >= 2; --i)
|
|
gpio_free(EP93XX_GPIO_LINE_E(i));
|
|
gpio_free(EP93XX_GPIO_LINE_EGPIO15);
|
|
fail_egpio15:
|
|
gpio_free(EP93XX_GPIO_LINE_EGPIO2);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
|
|
|
|
void ep93xx_ide_release_gpio(struct platform_device *pdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 2; i < 8; i++)
|
|
gpio_free(EP93XX_GPIO_LINE_E(i));
|
|
for (i = 4; i < 8; i++)
|
|
gpio_free(EP93XX_GPIO_LINE_G(i));
|
|
for (i = 0; i < 8; i++)
|
|
gpio_free(EP93XX_GPIO_LINE_H(i));
|
|
gpio_free(EP93XX_GPIO_LINE_EGPIO15);
|
|
gpio_free(EP93XX_GPIO_LINE_EGPIO2);
|
|
|
|
|
|
/* GPIO ports E[7:2], G[7:4] and H used by GPIO */
|
|
ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
|
|
EP93XX_SYSCON_DEVCFG_GONIDE |
|
|
EP93XX_SYSCON_DEVCFG_HONIDE);
|
|
}
|
|
EXPORT_SYMBOL(ep93xx_ide_release_gpio);
|
|
|
|
/*************************************************************************
|
|
* EP93xx ADC
|
|
*************************************************************************/
|
|
static struct resource ep93xx_adc_resources[] = {
|
|
DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
|
|
DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
|
|
};
|
|
|
|
static struct platform_device ep93xx_adc_device = {
|
|
.name = "ep93xx-adc",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(ep93xx_adc_resources),
|
|
.resource = ep93xx_adc_resources,
|
|
};
|
|
|
|
void __init ep93xx_register_adc(void)
|
|
{
|
|
/* Power up ADC, deactivate Touch Screen Controller */
|
|
ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
|
|
EP93XX_SYSCON_DEVCFG_ADCPD);
|
|
|
|
platform_device_register(&ep93xx_adc_device);
|
|
}
|
|
|
|
/*************************************************************************
|
|
* EP93xx Security peripheral
|
|
*************************************************************************/
|
|
|
|
/*
|
|
* The Maverick Key is 256 bits of micro fuses blown at the factory during
|
|
* manufacturing to uniquely identify a part.
|
|
*
|
|
* See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
|
|
*/
|
|
#define EP93XX_SECURITY_REG(x) (EP93XX_SECURITY_BASE + (x))
|
|
#define EP93XX_SECURITY_SECFLG EP93XX_SECURITY_REG(0x2400)
|
|
#define EP93XX_SECURITY_FUSEFLG EP93XX_SECURITY_REG(0x2410)
|
|
#define EP93XX_SECURITY_UNIQID EP93XX_SECURITY_REG(0x2440)
|
|
#define EP93XX_SECURITY_UNIQCHK EP93XX_SECURITY_REG(0x2450)
|
|
#define EP93XX_SECURITY_UNIQVAL EP93XX_SECURITY_REG(0x2460)
|
|
#define EP93XX_SECURITY_SECID1 EP93XX_SECURITY_REG(0x2500)
|
|
#define EP93XX_SECURITY_SECID2 EP93XX_SECURITY_REG(0x2504)
|
|
#define EP93XX_SECURITY_SECCHK1 EP93XX_SECURITY_REG(0x2520)
|
|
#define EP93XX_SECURITY_SECCHK2 EP93XX_SECURITY_REG(0x2524)
|
|
#define EP93XX_SECURITY_UNIQID2 EP93XX_SECURITY_REG(0x2700)
|
|
#define EP93XX_SECURITY_UNIQID3 EP93XX_SECURITY_REG(0x2704)
|
|
#define EP93XX_SECURITY_UNIQID4 EP93XX_SECURITY_REG(0x2708)
|
|
#define EP93XX_SECURITY_UNIQID5 EP93XX_SECURITY_REG(0x270c)
|
|
|
|
static char ep93xx_soc_id[33];
|
|
|
|
static const char __init *ep93xx_get_soc_id(void)
|
|
{
|
|
unsigned int id, id2, id3, id4, id5;
|
|
|
|
if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
|
|
return "bad Hamming code";
|
|
|
|
id = __raw_readl(EP93XX_SECURITY_UNIQID);
|
|
id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
|
|
id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
|
|
id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
|
|
id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
|
|
|
|
if (id != id2)
|
|
return "invalid";
|
|
|
|
/* Toss the unique ID into the entropy pool */
|
|
add_device_randomness(&id2, 4);
|
|
add_device_randomness(&id3, 4);
|
|
add_device_randomness(&id4, 4);
|
|
add_device_randomness(&id5, 4);
|
|
|
|
snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
|
|
"%08x%08x%08x%08x", id2, id3, id4, id5);
|
|
|
|
return ep93xx_soc_id;
|
|
}
|
|
|
|
static const char __init *ep93xx_get_soc_rev(void)
|
|
{
|
|
int rev = ep93xx_chip_revision();
|
|
|
|
switch (rev) {
|
|
case EP93XX_CHIP_REV_D0:
|
|
return "D0";
|
|
case EP93XX_CHIP_REV_D1:
|
|
return "D1";
|
|
case EP93XX_CHIP_REV_E0:
|
|
return "E0";
|
|
case EP93XX_CHIP_REV_E1:
|
|
return "E1";
|
|
case EP93XX_CHIP_REV_E2:
|
|
return "E2";
|
|
default:
|
|
return "unknown";
|
|
}
|
|
}
|
|
|
|
static const char __init *ep93xx_get_machine_name(void)
|
|
{
|
|
return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
|
|
}
|
|
|
|
static struct device __init *ep93xx_init_soc(void)
|
|
{
|
|
struct soc_device_attribute *soc_dev_attr;
|
|
struct soc_device *soc_dev;
|
|
|
|
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
|
|
if (!soc_dev_attr)
|
|
return NULL;
|
|
|
|
soc_dev_attr->machine = ep93xx_get_machine_name();
|
|
soc_dev_attr->family = "Cirrus Logic EP93xx";
|
|
soc_dev_attr->revision = ep93xx_get_soc_rev();
|
|
soc_dev_attr->soc_id = ep93xx_get_soc_id();
|
|
|
|
soc_dev = soc_device_register(soc_dev_attr);
|
|
if (IS_ERR(soc_dev)) {
|
|
kfree(soc_dev_attr->machine);
|
|
kfree(soc_dev_attr);
|
|
return NULL;
|
|
}
|
|
|
|
return soc_device_to_device(soc_dev);
|
|
}
|
|
|
|
struct device __init *ep93xx_init_devices(void)
|
|
{
|
|
struct device *parent;
|
|
|
|
/* Disallow access to MaverickCrunch initially */
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
|
|
|
|
/* Default all ports to GPIO */
|
|
ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
|
|
EP93XX_SYSCON_DEVCFG_GONK |
|
|
EP93XX_SYSCON_DEVCFG_EONIDE |
|
|
EP93XX_SYSCON_DEVCFG_GONIDE |
|
|
EP93XX_SYSCON_DEVCFG_HONIDE);
|
|
|
|
parent = ep93xx_init_soc();
|
|
|
|
/* Get the GPIO working early, other devices need it */
|
|
platform_device_register(&ep93xx_gpio_device);
|
|
|
|
amba_device_register(&uart1_device, &iomem_resource);
|
|
amba_device_register(&uart2_device, &iomem_resource);
|
|
amba_device_register(&uart3_device, &iomem_resource);
|
|
|
|
platform_device_register(&ep93xx_rtc_device);
|
|
platform_device_register(&ep93xx_ohci_device);
|
|
platform_device_register(&ep93xx_wdt_device);
|
|
|
|
gpio_led_register_device(-1, &ep93xx_led_data);
|
|
|
|
return parent;
|
|
}
|
|
|
|
void ep93xx_restart(enum reboot_mode mode, const char *cmd)
|
|
{
|
|
/*
|
|
* Set then clear the SWRST bit to initiate a software reset
|
|
*/
|
|
ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
|
|
ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
|
|
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
void __init ep93xx_init_late(void)
|
|
{
|
|
crunch_init();
|
|
}
|