xtensa: platform: s6105

Support for the S6105 IP Camera Reference Design Kit.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Chris Zankel <chris@zankel.net>

6 files changed, 177 insertions, 0 deletions

diff --git a/arch/xtensa/platforms/s6105/Makefile b/arch/xtensa/platforms/s6105/Makefile
new file mode 100644
index 00000000000..0be6194bcb7
--- /dev/null
+++ b/arch/xtensa/platforms/s6105/Makefile
@@ -0,0 +1,3 @@
+# Makefile for the Stretch S6105 eval board
+
+obj-y           := setup.o device.o
diff --git a/arch/xtensa/platforms/s6105/device.c b/arch/xtensa/platforms/s6105/device.c
new file mode 100644
index 00000000000..78b08be5a92
--- /dev/null
+++ b/arch/xtensa/platforms/s6105/device.c
@@ -0,0 +1,67 @@
+/*
+ * s6105 platform devices
+ *
+ * Copyright (c) 2009 emlix GmbH
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+
+#include <variant/hardware.h>
+
+#define UART_INTNUM             4
+
+static const signed char uart_irq_mappings[] = {
+        S6_INTC_UART(0),
+        S6_INTC_UART(1),
+        -1,
+};
+
+const signed char *platform_irq_mappings[NR_IRQS] = {
+        [UART_INTNUM] = uart_irq_mappings,
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+        {
+                .membase = (void *)S6_REG_UART + 0x0000,
+                .mapbase = S6_REG_UART + 0x0000,
+                .irq = UART_INTNUM,
+                .uartclk = S6_SCLK,
+                .regshift = 2,
+                .iotype = SERIAL_IO_MEM,
+                .flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST,
+        },
+        {
+                .membase = (void *)S6_REG_UART + 0x1000,
+                .mapbase = S6_REG_UART + 0x1000,
+                .irq = UART_INTNUM,
+                .uartclk = S6_SCLK,
+                .regshift = 2,
+                .iotype = SERIAL_IO_MEM,
+                .flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST,
+        },
+        { },
+};
+
+static struct platform_device platform_devices[] = {
+        {
+                .name = "serial8250",
+                .id = PLAT8250_DEV_PLATFORM,
+                .dev = {
+                        .platform_data = serial_platform_data,
+                },
+        },
+};
+
+static int __init device_init(void)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(platform_devices); i++)
+                platform_device_register(&platform_devices[i]);
+        return 0;
+}
+arch_initcall_sync(device_init);
diff --git a/arch/xtensa/platforms/s6105/include/platform/gpio.h b/arch/xtensa/platforms/s6105/include/platform/gpio.h
new file mode 100644
index 00000000000..fa11aa4b61e
--- /dev/null
+++ b/arch/xtensa/platforms/s6105/include/platform/gpio.h
@@ -0,0 +1,27 @@
+#ifndef __ASM_XTENSA_S6105_GPIO_H
+#define __ASM_XTENSA_S6105_GPIO_H
+
+#define GPIO_BP_TEMP_ALARM      0
+#define GPIO_PB_RESET_IN        1
+#define GPIO_EXP_IRQ            2
+#define GPIO_TRIGGER_IRQ        3
+#define GPIO_RTC_IRQ            4
+#define GPIO_PHY_IRQ            5
+#define GPIO_IMAGER_RESET       6
+#define GPIO_SD_IRQ             7
+#define GPIO_MINI_BOOT_INH      8
+#define GPIO_BOARD_RESET        9
+#define GPIO_EXP_PRESENT        10
+#define GPIO_LED1_NGREEN        12
+#define GPIO_LED1_RED           13
+#define GPIO_LED0_NGREEN        14
+#define GPIO_LED0_NRED          15
+#define GPIO_SPI_CS0            16
+#define GPIO_SPI_CS1            17
+#define GPIO_SPI_CS3            19
+#define GPIO_SPI_CS4            20
+#define GPIO_SD_WP              21
+#define GPIO_BP_RESET           22
+#define GPIO_ALARM_OUT          23
+
+#endif /* __ASM_XTENSA_S6105_GPIO_H */
diff --git a/arch/xtensa/platforms/s6105/include/platform/hardware.h b/arch/xtensa/platforms/s6105/include/platform/hardware.h
new file mode 100644
index 00000000000..d628efac708
--- /dev/null
+++ b/arch/xtensa/platforms/s6105/include/platform/hardware.h
@@ -0,0 +1,11 @@
+#ifndef __XTENSA_S6105_HARDWARE_H
+#define __XTENSA_S6105_HARDWARE_H
+
+#define PLATFORM_DEFAULT_MEM_START      0x40000000
+#define PLATFORM_DEFAULT_MEM_SIZE       0x08000000
+
+#define MAX_DMA_ADDRESS                 0
+
+#define KERNELOFFSET                    (PLATFORM_DEFAULT_MEM_START + 0x1000)
+
+#endif /* __XTENSA_S6105_HARDWARE_H */
diff --git a/arch/xtensa/platforms/s6105/include/platform/serial.h b/arch/xtensa/platforms/s6105/include/platform/serial.h
new file mode 100644
index 00000000000..c8a771e5981
--- /dev/null
+++ b/arch/xtensa/platforms/s6105/include/platform/serial.h
@@ -0,0 +1,8 @@
+#ifndef __ASM_XTENSA_S6105_SERIAL_H
+#define __ASM_XTENSA_S6105_SERIAL_H
+
+#include <variant/hardware.h>
+
+#define BASE_BAUD (S6_SCLK / 16)
+
+#endif /* __ASM_XTENSA_S6105_SERIAL_H */
diff --git a/arch/xtensa/platforms/s6105/setup.c b/arch/xtensa/platforms/s6105/setup.c
new file mode 100644
index 00000000000..ae041d5027a
--- /dev/null
+++ b/arch/xtensa/platforms/s6105/setup.c
@@ -0,0 +1,61 @@
+/*
+ * s6105 control routines
+ *
+ * Copyright (c) 2009 emlix GmbH
+ */
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+
+#include <asm/bootparam.h>
+
+#include <variant/hardware.h>
+#include <platform/gpio.h>
+
+void platform_halt(void)
+{
+        local_irq_disable();
+        while (1)
+                ;
+}
+
+void platform_power_off(void)
+{
+        platform_halt();
+}
+
+void platform_restart(void)
+{
+        platform_halt();
+}
+
+void __init platform_setup(char **cmdline)
+{
+        unsigned long reg;
+
+        reg = readl(S6_REG_GREG1 + S6_GREG1_CLKGATE);
+        reg &= ~(1 << S6_GREG1_BLOCK_SB);
+        writel(reg, S6_REG_GREG1 + S6_GREG1_CLKGATE);
+
+        reg = readl(S6_REG_GREG1 + S6_GREG1_BLOCKENA);
+        reg |= 1 << S6_GREG1_BLOCK_SB;
+        writel(reg, S6_REG_GREG1 + S6_GREG1_BLOCKENA);
+
+        printk(KERN_NOTICE "S6105 on Stretch S6000 - "
+                "Copyright (C) 2009 emlix GmbH <info@emlix.com>\n");
+}
+
+void __init platform_init(bp_tag_t *first)
+{
+        gpio_request(GPIO_LED1_NGREEN, "led1_green");
+        gpio_request(GPIO_LED1_RED, "led1_red");
+        gpio_direction_output(GPIO_LED1_NGREEN, 1);
+}
+
+void platform_heartbeat(void)
+{
+        static unsigned int c;
+
+        if (!(++c & 0x4F))
+                gpio_direction_output(GPIO_LED1_RED, !(c & 0x10));
+}