#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/leds.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>
*/
static unsigned int last_jiffy_time;
-#define TIMER4_TICKS_PER_JIFFY ((CLOCK_TICK_RATE + (HZ/2)) / HZ)
+#define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
{
{
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) {
}
+/*************************************************************************
+ * 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
*************************************************************************/
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);
platform_device_register(&ep93xx_i2c_device);
}
+
+/*************************************************************************
+ * EP93xx LEDs
+ *************************************************************************/
+static struct gpio_led ep93xx_led_pins[] = {
+ {
+ .name = "platform:grled",
+ .gpio = EP93XX_GPIO_LINE_GRLED,
+ }, {
+ .name = "platform:rdled",
+ .gpio = EP93XX_GPIO_LINE_RDLED,
+ },
+};
+
+static struct gpio_led_platform_data ep93xx_led_data = {
+ .num_leds = ARRAY_SIZE(ep93xx_led_pins),
+ .leds = ep93xx_led_pins,
+};
+
+static struct platform_device ep93xx_leds = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev = {
+ .platform_data = &ep93xx_led_data,
+ },
+};
+
+
+/*************************************************************************
+ * EP93xx pwm peripheral handling
+ *************************************************************************/
+static struct resource ep93xx_pwm0_resource[] = {
+ {
+ .start = EP93XX_PWM_PHYS_BASE,
+ .end = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+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[] = {
+ {
+ .start = EP93XX_PWM_PHYS_BASE + 0x20,
+ .end = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+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);
+}
+
+int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
+{
+ int err;
+
+ if (pdev->id == 0) {
+ err = 0;
+ } else if (pdev->id == 1) {
+ err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
+ dev_name(&pdev->dev));
+ if (err)
+ return err;
+ err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
+ if (err)
+ goto fail;
+
+ /* PWM 1 output on EGPIO[14] */
+ ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
+ } else {
+ err = -ENODEV;
+ }
+
+ return err;
+
+fail:
+ gpio_free(EP93XX_GPIO_LINE_EGPIO14);
+ return err;
+}
+EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
+
+void ep93xx_pwm_release_gpio(struct platform_device *pdev)
+{
+ 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);
+
+
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();
platform_device_register(&ep93xx_rtc_device);
platform_device_register(&ep93xx_ohci_device);
+ platform_device_register(&ep93xx_leds);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff