diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 955 |
1 files changed, 0 insertions, 955 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c deleted file mode 100644 index 9c6154bb37b5..000000000000 --- a/arch/arm/mach-ep93xx/core.c +++ /dev/null @@ -1,955 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * arch/arm/mach-ep93xx/core.c - * Core routines for Cirrus EP93xx chips. - * - * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> - * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org> - * - * Thanks go to Michael Burian and Ray Lehtiniemi for their key - * role in the ep93xx linux community. - */ - -#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/dma-mapping.h> -#include <linux/sys_soc.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <linux/gpio.h> -#include <linux/leds.h> -#include <linux/uaccess.h> -#include <linux/termios.h> -#include <linux/amba/bus.h> -#include <linux/amba/serial.h> -#include <linux/mtd/physmap.h> -#include <linux/i2c.h> -#include <linux/gpio/machine.h> -#include <linux/spi/spi.h> -#include <linux/export.h> -#include <linux/irqchip/arm-vic.h> -#include <linux/reboot.h> -#include <linux/usb/ohci_pdriver.h> -#include <linux/random.h> -#include <linux/ioport.h> - -#include "hardware.h" -#include <linux/platform_data/video-ep93xx.h> -#include <linux/platform_data/keypad-ep93xx.h> -#include <linux/platform_data/spi-ep93xx.h> -#include <linux/soc/cirrus/ep93xx.h> - -#include "gpio-ep93xx.h" - -#include <asm/mach/arch.h> -#include <asm/mach/map.h> - -#include "soc.h" -#include "irqs.h" - -/************************************************************************* - * Static I/O mappings that are needed for all EP93xx platforms - *************************************************************************/ -static struct map_desc ep93xx_io_desc[] __initdata = { - { - .virtual = EP93XX_AHB_VIRT_BASE, - .pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE), - .length = EP93XX_AHB_SIZE, - .type = MT_DEVICE, - }, { - .virtual = EP93XX_APB_VIRT_BASE, - .pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE), - .length = EP93XX_APB_SIZE, - .type = MT_DEVICE, - }, -}; - -void __init ep93xx_map_io(void) -{ - iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc)); -} - -/************************************************************************* - * EP93xx IRQ handling - *************************************************************************/ -void __init ep93xx_init_irq(void) -{ - vic_init(EP93XX_VIC1_BASE, IRQ_EP93XX_VIC0, EP93XX_VIC1_VALID_IRQ_MASK, 0); - vic_init(EP93XX_VIC2_BASE, IRQ_EP93XX_VIC1, EP93XX_VIC2_VALID_IRQ_MASK, 0); -} - - -/************************************************************************* - * EP93xx System Controller Software Locked register handling - *************************************************************************/ - -/* - * syscon_swlock prevents anything else from writing to the syscon - * block while a software locked register is being written. - */ -static DEFINE_SPINLOCK(syscon_swlock); - -void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg) -{ - unsigned long flags; - - spin_lock_irqsave(&syscon_swlock, flags); - - __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); - __raw_writel(val, reg); - - spin_unlock_irqrestore(&syscon_swlock, flags); -} - -void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits) -{ - unsigned long flags; - unsigned int val; - - spin_lock_irqsave(&syscon_swlock, flags); - - val = __raw_readl(EP93XX_SYSCON_DEVCFG); - val &= ~clear_bits; - val |= set_bits; - __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); - __raw_writel(val, EP93XX_SYSCON_DEVCFG); - - spin_unlock_irqrestore(&syscon_swlock, flags); -} - -/** - * ep93xx_chip_revision() - returns the EP93xx chip revision - * - * See "platform.h" for more information. - */ -unsigned int ep93xx_chip_revision(void) -{ - unsigned int v; - - v = __raw_readl(EP93XX_SYSCON_SYSCFG); - v &= EP93XX_SYSCON_SYSCFG_REV_MASK; - v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT; - return v; -} -EXPORT_SYMBOL_GPL(ep93xx_chip_revision); - -/************************************************************************* - * EP93xx GPIO - *************************************************************************/ -/* port A */ -static struct resource ep93xx_a_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x10, 0x04, "dir"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x90, 0x1c, "intr"), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB), -}; - -static struct platform_device ep93xx_a_gpio = { - .name = "gpio-ep93xx", - .id = 0, - .num_resources = ARRAY_SIZE(ep93xx_a_gpio_resources), - .resource = ep93xx_a_gpio_resources, -}; - -/* port B */ -static struct resource ep93xx_b_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x04, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x14, 0x04, "dir"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0xac, 0x1c, "intr"), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB), -}; - -static struct platform_device ep93xx_b_gpio = { - .name = "gpio-ep93xx", - .id = 1, - .num_resources = ARRAY_SIZE(ep93xx_b_gpio_resources), - .resource = ep93xx_b_gpio_resources, -}; - -/* port C */ -static struct resource ep93xx_c_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x08, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x18, 0x04, "dir"), -}; - -static struct platform_device ep93xx_c_gpio = { - .name = "gpio-ep93xx", - .id = 2, - .num_resources = ARRAY_SIZE(ep93xx_c_gpio_resources), - .resource = ep93xx_c_gpio_resources, -}; - -/* port D */ -static struct resource ep93xx_d_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x0c, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x1c, 0x04, "dir"), -}; - -static struct platform_device ep93xx_d_gpio = { - .name = "gpio-ep93xx", - .id = 3, - .num_resources = ARRAY_SIZE(ep93xx_d_gpio_resources), - .resource = ep93xx_d_gpio_resources, -}; - -/* port E */ -static struct resource ep93xx_e_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x20, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x24, 0x04, "dir"), -}; - -static struct platform_device ep93xx_e_gpio = { - .name = "gpio-ep93xx", - .id = 4, - .num_resources = ARRAY_SIZE(ep93xx_e_gpio_resources), - .resource = ep93xx_e_gpio_resources, -}; - -/* port F */ -static struct resource ep93xx_f_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x30, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x34, 0x04, "dir"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x4c, 0x1c, "intr"), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX), - DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX), -}; - -static struct platform_device ep93xx_f_gpio = { - .name = "gpio-ep93xx", - .id = 5, - .num_resources = ARRAY_SIZE(ep93xx_f_gpio_resources), - .resource = ep93xx_f_gpio_resources, -}; - -/* port G */ -static struct resource ep93xx_g_gpio_resources[] = { - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x38, 0x04, "data"), - DEFINE_RES_MEM_NAMED(EP93XX_GPIO_PHYS_BASE + 0x3c, 0x04, "dir"), -}; - -static struct platform_device ep93xx_g_gpio = { - .name = "gpio-ep93xx", - .id = 6, - .num_resources = ARRAY_SIZE(ep93xx_g_gpio_resources), - .resource = ep93xx_g_gpio_resources, -}; - -static struct platform_device *ep93xx_gpio_device[] __initdata = { - &ep93xx_a_gpio, - &ep93xx_b_gpio, - &ep93xx_c_gpio, - &ep93xx_d_gpio, - &ep93xx_e_gpio, - &ep93xx_f_gpio, - &ep93xx_g_gpio, -}; - -/************************************************************************* - * EP93xx peripheral handling - *************************************************************************/ -#define EP93XX_UART_MCR_OFFSET (0x0100) - -static void ep93xx_uart_set_mctrl(struct amba_device *dev, - void __iomem *base, unsigned int mctrl) -{ - unsigned int mcr; - - mcr = 0; - if (mctrl & TIOCM_RTS) - mcr |= 2; - if (mctrl & TIOCM_DTR) - mcr |= 1; - - __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET); -} - -static struct amba_pl010_data ep93xx_uart_data = { - .set_mctrl = ep93xx_uart_set_mctrl, -}; - -static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE, - { IRQ_EP93XX_UART1 }, &ep93xx_uart_data); - -static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE, - { IRQ_EP93XX_UART2 }, NULL); - -static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE, - { IRQ_EP93XX_UART3 }, &ep93xx_uart_data); - -static struct resource ep93xx_rtc_resource[] = { - DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c), -}; - -static struct platform_device ep93xx_rtc_device = { - .name = "ep93xx-rtc", - .id = -1, - .num_resources = ARRAY_SIZE(ep93xx_rtc_resource), - .resource = ep93xx_rtc_resource, -}; - -/************************************************************************* - * EP93xx OHCI USB Host - *************************************************************************/ - -static struct clk *ep93xx_ohci_host_clock; - -static int ep93xx_ohci_power_on(struct platform_device *pdev) -{ - if (!ep93xx_ohci_host_clock) { - ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(ep93xx_ohci_host_clock)) - return PTR_ERR(ep93xx_ohci_host_clock); - } - - return clk_prepare_enable(ep93xx_ohci_host_clock); -} - -static void ep93xx_ohci_power_off(struct platform_device *pdev) -{ - clk_disable(ep93xx_ohci_host_clock); -} - -static struct usb_ohci_pdata ep93xx_ohci_pdata = { - .power_on = ep93xx_ohci_power_on, - .power_off = ep93xx_ohci_power_off, - .power_suspend = ep93xx_ohci_power_off, -}; - -static struct resource ep93xx_ohci_resources[] = { - DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000), - DEFINE_RES_IRQ(IRQ_EP93XX_USB), -}; - -static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32); - -static struct platform_device ep93xx_ohci_device = { - .name = "ohci-platform", - .id = -1, - .num_resources = ARRAY_SIZE(ep93xx_ohci_resources), - .resource = ep93xx_ohci_resources, - .dev = { - .dma_mask = &ep93xx_ohci_dma_mask, - .coherent_dma_mask = DMA_BIT_MASK(32), - .platform_data = &ep93xx_ohci_pdata, - }, -}; - -/************************************************************************* - * EP93xx physmap'ed flash - *************************************************************************/ -static struct physmap_flash_data ep93xx_flash_data; - -static struct resource ep93xx_flash_resource = { - .flags = IORESOURCE_MEM, -}; - -static struct platform_device ep93xx_flash = { - .name = "physmap-flash", - .id = 0, - .dev = { - .platform_data = &ep93xx_flash_data, - }, - .num_resources = 1, - .resource = &ep93xx_flash_resource, -}; - -/** - * ep93xx_register_flash() - Register the external flash device. - * @width: bank width in octets - * @start: resource start address - * @size: resource size - */ -void __init ep93xx_register_flash(unsigned int width, - resource_size_t start, resource_size_t size) -{ - ep93xx_flash_data.width = width; - - ep93xx_flash_resource.start = start; - ep93xx_flash_resource.end = start + size - 1; - - platform_device_register(&ep93xx_flash); -} - - -/************************************************************************* - * EP93xx ethernet peripheral handling - *************************************************************************/ -static struct ep93xx_eth_data ep93xx_eth_data; - -static struct resource ep93xx_eth_resource[] = { - DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000), - DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET), -}; - -static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32); - -static struct platform_device ep93xx_eth_device = { - .name = "ep93xx-eth", - .id = -1, - .dev = { - .platform_data = &ep93xx_eth_data, - .coherent_dma_mask = DMA_BIT_MASK(32), - .dma_mask = &ep93xx_eth_dma_mask, - }, - .num_resources = ARRAY_SIZE(ep93xx_eth_resource), - .resource = ep93xx_eth_resource, -}; - -/** - * ep93xx_register_eth - Register the built-in ethernet platform device. - * @data: platform specific ethernet configuration (__initdata) - * @copy_addr: flag indicating that the MAC address should be copied - * from the IndAd registers (as programmed by the bootloader) - */ -void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr) -{ - if (copy_addr) - memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6); - - ep93xx_eth_data = *data; - platform_device_register(&ep93xx_eth_device); -} - - -/************************************************************************* - * EP93xx i2c peripheral handling - *************************************************************************/ - -/* All EP93xx devices use the same two GPIO pins for I2C bit-banging */ -static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = { - .dev_id = "i2c-gpio.0", - .table = { - /* Use local offsets on gpiochip/port "G" */ - GPIO_LOOKUP_IDX("gpio-ep93xx.6", 1, NULL, 0, - GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), - GPIO_LOOKUP_IDX("gpio-ep93xx.6", 0, NULL, 1, - GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), - { } - }, -}; - -static struct platform_device ep93xx_i2c_device = { - .name = "i2c-gpio", - .id = 0, - .dev = { - .platform_data = NULL, - }, -}; - -/** - * ep93xx_register_i2c - Register the i2c platform device. - * @devices: platform specific i2c bus device information (__initdata) - * @num: the number of devices on the i2c bus - */ -void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num) -{ - /* - * FIXME: this just sets the two pins as non-opendrain, as no - * platforms tries to do that anyway. Flag the applicable lines - * as open drain in the GPIO_LOOKUP above and the driver or - * gpiolib will handle open drain/open drain emulation as need - * be. Right now i2c-gpio emulates open drain which is not - * optimal. - */ - __raw_writel((0 << 1) | (0 << 0), - EP93XX_GPIO_EEDRIVE); - - i2c_register_board_info(0, devices, num); - gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table); - platform_device_register(&ep93xx_i2c_device); -} - -/************************************************************************* - * EP93xx SPI peripheral handling - *************************************************************************/ -static struct ep93xx_spi_info ep93xx_spi_master_data; - -static struct resource ep93xx_spi_resources[] = { - DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18), - DEFINE_RES_IRQ(IRQ_EP93XX_SSP), -}; - -static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32); - -static struct platform_device ep93xx_spi_device = { - .name = "ep93xx-spi", - .id = 0, - .dev = { - .platform_data = &ep93xx_spi_master_data, - .coherent_dma_mask = DMA_BIT_MASK(32), - .dma_mask = &ep93xx_spi_dma_mask, - }, - .num_resources = ARRAY_SIZE(ep93xx_spi_resources), - .resource = ep93xx_spi_resources, -}; - -/** - * ep93xx_register_spi() - registers spi platform device - * @info: ep93xx board specific spi master info (__initdata) - * @devices: SPI devices to register (__initdata) - * @num: number of SPI devices to register - * - * This function registers platform device for the EP93xx SPI controller and - * also makes sure that SPI pins are muxed so that I2S is not using those pins. - */ -void __init ep93xx_register_spi(struct ep93xx_spi_info *info, - struct spi_board_info *devices, int num) -{ - /* - * When SPI is used, we need to make sure that I2S is muxed off from - * SPI pins. - */ - ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP); - - ep93xx_spi_master_data = *info; - spi_register_board_info(devices, num); - platform_device_register(&ep93xx_spi_device); -} - -/************************************************************************* - * EP93xx LEDs - *************************************************************************/ -static const struct gpio_led ep93xx_led_pins[] __initconst = { - { - .name = "platform:grled", - }, { - .name = "platform:rdled", - }, -}; - -static const struct gpio_led_platform_data ep93xx_led_data __initconst = { - .num_leds = ARRAY_SIZE(ep93xx_led_pins), - .leds = ep93xx_led_pins, -}; - -static struct gpiod_lookup_table ep93xx_leds_gpio_table = { - .dev_id = "leds-gpio", - .table = { - /* Use local offsets on gpiochip/port "E" */ - GPIO_LOOKUP_IDX("gpio-ep93xx.4", 0, NULL, 0, GPIO_ACTIVE_HIGH), - GPIO_LOOKUP_IDX("gpio-ep93xx.4", 1, NULL, 1, GPIO_ACTIVE_HIGH), - { } - }, -}; - -/************************************************************************* - * EP93xx pwm peripheral handling - *************************************************************************/ -static struct resource ep93xx_pwm0_resource[] = { - DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10), -}; - -static struct platform_device ep93xx_pwm0_device = { - .name = "ep93xx-pwm", - .id = 0, - .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource), - .resource = ep93xx_pwm0_resource, -}; - -static struct resource ep93xx_pwm1_resource[] = { - DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10), -}; - -static struct platform_device ep93xx_pwm1_device = { - .name = "ep93xx-pwm", - .id = 1, - .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource), - .resource = ep93xx_pwm1_resource, -}; - -void __init ep93xx_register_pwm(int pwm0, int pwm1) -{ - if (pwm0) - platform_device_register(&ep93xx_pwm0_device); - - /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */ - if (pwm1) - platform_device_register(&ep93xx_pwm1_device); -} - -/************************************************************************* - * 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); -} - -/************************************************************************* - * 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); -} - -/************************************************************************* - * 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; - unsigned int i; - - /* 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 */ - for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_device); i++) - platform_device_register(ep93xx_gpio_device[i]); - - 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); - - gpiod_add_lookup_table(&ep93xx_leds_gpio_table); - 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) - ; -} |