diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 85 |
1 files changed, 50 insertions, 35 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 204dc5cbd0b8..b390c35f8bc1 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -16,40 +16,23 @@ #include <linux/kernel.h> #include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/sched.h> +#include <linux/platform_device.h> #include <linux/interrupt.h> -#include <linux/serial.h> -#include <linux/tty.h> -#include <linux/bitops.h> -#include <linux/serial_8250.h> -#include <linux/serial_core.h> -#include <linux/device.h> -#include <linux/mm.h> #include <linux/dma-mapping.h> -#include <linux/time.h> #include <linux/timex.h> -#include <linux/delay.h> +#include <linux/io.h> +#include <linux/gpio.h> #include <linux/termios.h> #include <linux/amba/bus.h> #include <linux/amba/serial.h> -#include <linux/io.h> #include <linux/i2c.h> #include <linux/i2c-gpio.h> -#include <asm/types.h> -#include <asm/setup.h> -#include <asm/memory.h> #include <mach/hardware.h> -#include <asm/irq.h> -#include <asm/system.h> -#include <asm/tlbflush.h> -#include <asm/pgtable.h> #include <asm/mach/map.h> #include <asm/mach/time.h> #include <asm/mach/irq.h> -#include <mach/gpio.h> #include <asm/hardware/vic.h> @@ -362,8 +345,8 @@ void __init ep93xx_init_irq(void) { int gpio_irq; - vic_init((void *)EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0); - vic_init((void *)EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0); + vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0); + vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0); for (gpio_irq = gpio_to_irq(0); gpio_irq <= gpio_to_irq(EP93XX_GPIO_LINE_MAX_IRQ); ++gpio_irq) { @@ -385,6 +368,47 @@ void __init ep93xx_init_irq(void) /************************************************************************* + * 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); +} +EXPORT_SYMBOL(ep93xx_syscon_swlocked_write); + +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 |= set_bits; + val &= ~clear_bits; + __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); + __raw_writel(val, EP93XX_SYSCON_DEVCFG); + + spin_unlock_irqrestore(&syscon_swlock, flags); +} +EXPORT_SYMBOL(ep93xx_devcfg_set_clear); + + +/************************************************************************* * EP93xx peripheral handling *************************************************************************/ #define EP93XX_UART_MCR_OFFSET (0x0100) @@ -517,10 +541,8 @@ static struct platform_device ep93xx_eth_device = { void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr) { - if (copy_addr) { - memcpy(data->dev_addr, - (void *)(EP93XX_ETHERNET_BASE + 0x50), 6); - } + if (copy_addr) + memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6); ep93xx_eth_data = *data; platform_device_register(&ep93xx_eth_device); @@ -550,15 +572,8 @@ extern void ep93xx_gpio_init(void); void __init ep93xx_init_devices(void) { - unsigned int v; - - /* - * Disallow access to MaverickCrunch initially. - */ - v = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG); - v &= ~EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE; - __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); - __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG); + /* Disallow access to MaverickCrunch initially */ + ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA); ep93xx_gpio_init(); |