[SERIAL] Provide Cirrus EP93xx AMBA PL010 serial support.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 865427bfad7e..2d892e4daa07 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -30,7 +30,9 @@
 #include <linux/time.h>
 #include <linux/timex.h>
 #include <linux/delay.h>
+#include <linux/termios.h>
 #include <linux/amba/bus.h>
+#include <linux/amba/serial.h>
 
 #include <asm/types.h>
 #include <asm/setup.h>
@@ -360,6 +362,68 @@ void __init ep93xx_init_irq(void)
 /*************************************************************************
  * 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 struct amba_device uart1_device = {
+        .dev            = {
+                .bus_id         = "apb:uart1",
+                .platform_data  = &ep93xx_uart_data,
+        },
+        .res            = {
+                .start  = EP93XX_UART1_PHYS_BASE,
+                .end    = EP93XX_UART1_PHYS_BASE + 0x0fff,
+                .flags  = IORESOURCE_MEM,
+        },
+        .irq            = { IRQ_EP93XX_UART1, NO_IRQ },
+        .periphid       = 0x00041010,
+};
+
+static struct amba_device uart2_device = {
+        .dev            = {
+                .bus_id         = "apb:uart2",
+                .platform_data  = &ep93xx_uart_data,
+        },
+        .res            = {
+                .start  = EP93XX_UART2_PHYS_BASE,
+                .end    = EP93XX_UART2_PHYS_BASE + 0x0fff,
+                .flags  = IORESOURCE_MEM,
+        },
+        .irq            = { IRQ_EP93XX_UART2, NO_IRQ },
+        .periphid       = 0x00041010,
+};
+
+static struct amba_device uart3_device = {
+        .dev            = {
+                .bus_id         = "apb:uart3",
+                .platform_data  = &ep93xx_uart_data,
+        },
+        .res            = {
+                .start  = EP93XX_UART3_PHYS_BASE,
+                .end    = EP93XX_UART3_PHYS_BASE + 0x0fff,
+                .flags  = IORESOURCE_MEM,
+        },
+        .irq            = { IRQ_EP93XX_UART3, NO_IRQ },
+        .periphid       = 0x00041010,
+};
+
 void __init ep93xx_init_devices(void)
 {
         unsigned int v;
@@ -371,4 +435,8 @@ void __init ep93xx_init_devices(void)
         v &= ~EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE;
         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
         __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG);
+
+        amba_device_register(&uart1_device, &iomem_resource);
+        amba_device_register(&uart2_device, &iomem_resource);
+        amba_device_register(&uart3_device, &iomem_resource);
 }