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1011 lines
28 KiB
1011 lines
28 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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* Copyright (C) 2007 Herbert Valerio Riedel <[email protected]> |
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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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|
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#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt |
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|
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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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|
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#include "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 <linux/soc/cirrus/ep93xx.h> |
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|
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#include "gpio-ep93xx.h" |
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|
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#include <asm/mach/arch.h> |
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#include <asm/mach/map.h> |
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|
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#include "soc.h" |
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|
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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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|
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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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/************************************************************************* |
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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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/************************************************************************* |
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* EP93xx System Controller Software Locked register handling |
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*************************************************************************/ |
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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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|
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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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|
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spin_unlock_irqrestore(&syscon_swlock, flags); |
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} |
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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 "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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|
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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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/************************************************************************* |
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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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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX), |
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DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX), |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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/** |
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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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|
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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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/************************************************************************* |
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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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|
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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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/** |
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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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|
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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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/************************************************************************* |
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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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|
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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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/************************************************************************* |
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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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|
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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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|
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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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|
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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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|
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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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{ |
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if (pdev->id == 1) { |
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gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14); |
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gpio_free(EP93XX_GPIO_LINE_EGPIO14); |
|
|
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/* EGPIO[14] used for GPIO */ |
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ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG); |
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} |
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} |
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EXPORT_SYMBOL(ep93xx_pwm_release_gpio); |
|
|
|
|
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/************************************************************************* |
|
* EP93xx video peripheral handling |
|
*************************************************************************/ |
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static struct ep93xxfb_mach_info ep93xxfb_data; |
|
|
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static struct resource ep93xx_fb_resource[] = { |
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DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800), |
|
}; |
|
|
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static struct platform_device ep93xx_fb_device = { |
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.name = "ep93xx-fb", |
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.id = -1, |
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.dev = { |
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.platform_data = &ep93xxfb_data, |
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.coherent_dma_mask = DMA_BIT_MASK(32), |
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.dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask, |
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}, |
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.num_resources = ARRAY_SIZE(ep93xx_fb_resource), |
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.resource = ep93xx_fb_resource, |
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}; |
|
|
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/* The backlight use a single register in the framebuffer's register space */ |
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#define EP93XX_RASTER_REG_BRIGHTNESS 0x20 |
|
|
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static struct resource ep93xx_bl_resources[] = { |
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DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE + |
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EP93XX_RASTER_REG_BRIGHTNESS, 0x04), |
|
}; |
|
|
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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(); |
|
}
|
|
|