unicore32 machine related files: core files

This patch adds machine related core files, also including build infrastructure.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 440 insertions, 0 deletions

diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index cc6a83215881..90835c959476 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -231,6 +231,31 @@ config PUV3_RTC
         tristate "PKUnity v3 RTC Support"
         depends on !ARCH_FPGA
 
+if PUV3_NB0916
+
+menu "PKUnity NetBook-0916 Features"
+
+config I2C_BATTERY_BQ27200
+        tristate "I2C Battery BQ27200 Support"
+        select PUV3_I2C
+        select POWER_SUPPLY
+        select BATTERY_BQ27x00
+
+config I2C_EEPROM_AT24
+        tristate "I2C EEPROMs AT24 support"
+        select PUV3_I2C
+        select MISC_DEVICES
+        select EEPROM_AT24
+
+config LCD_BACKLIGHT
+        tristate "LCD Backlight support"
+        select BACKLIGHT_LCD_SUPPORT
+        select BACKLIGHT_PWM
+
+endmenu
+
+endif
+
 endif
 
 source "drivers/Kconfig"
diff --git a/arch/unicore32/kernel/puv3-core.c b/arch/unicore32/kernel/puv3-core.c
new file mode 100644
index 000000000000..26cc52b51e7b
--- /dev/null
+++ b/arch/unicore32/kernel/puv3-core.c
@@ -0,0 +1,270 @@
+/*
+ *  linux/arch/unicore32/kernel/puv3-core.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ *      Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
+ *      Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/sysdev.h>
+#include <linux/amba/bus.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/cnt32_to_63.h>
+#include <linux/usb/musb.h>
+
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <mach/pm.h>
+
+/*
+ * This is the PKUnity sched_clock implementation.  This has
+ * a resolution of 271ns, and a maximum value of 32025597s (370 days).
+ *
+ * The return value is guaranteed to be monotonic in that range as
+ * long as there is always less than 582 seconds between successive
+ * calls to this function.
+ *
+ *  ( * 1E9 / CLOCK_TICK_RATE ) -> about 2235/32
+ */
+unsigned long long sched_clock(void)
+{
+        unsigned long long v = cnt32_to_63(OST_OSCR);
+
+        /* original conservative method, but overflow frequently
+         * v *= NSEC_PER_SEC >> 12;
+         * do_div(v, CLOCK_TICK_RATE >> 12);
+         */
+        v = ((v & 0x7fffffffffffffffULL) * 2235) >> 5;
+
+        return v;
+}
+
+static struct resource puv3_usb_resources[] = {
+        /* order is significant! */
+        {
+                .start          = PKUNITY_USB_BASE,
+                .end            = PKUNITY_USB_BASE + 0x3ff,
+                .flags          = IORESOURCE_MEM,
+        }, {
+                .start          = IRQ_USB,
+                .flags          = IORESOURCE_IRQ,
+        }, {
+                .start          = IRQ_USB,
+                .flags          = IORESOURCE_IRQ,
+        },
+};
+
+static struct musb_hdrc_config  puv3_usb_config[] = {
+        {
+                .num_eps = 16,
+                .multipoint = 1,
+#ifdef CONFIG_USB_INVENTRA_DMA
+                .dma = 1,
+                .dma_channels = 8,
+#endif
+        },
+};
+
+static struct musb_hdrc_platform_data puv3_usb_plat = {
+        .mode           = MUSB_HOST,
+        .min_power      = 100,
+        .clock          = 0,
+        .config         = puv3_usb_config,
+};
+
+static struct resource puv3_mmc_resources[] = {
+        [0] = {
+                .start  = PKUNITY_SDC_BASE,
+                .end    = PKUNITY_SDC_BASE + 0xfff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = IRQ_SDC,
+                .end    = IRQ_SDC,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct resource puv3_rtc_resources[] = {
+        [0] = {
+                .start = PKUNITY_RTC_BASE,
+                .end   = PKUNITY_RTC_BASE + 0xff,
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_RTCAlarm,
+                .end   = IRQ_RTCAlarm,
+                .flags = IORESOURCE_IRQ,
+        },
+        [2] = {
+                .start = IRQ_RTC,
+                .end   = IRQ_RTC,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static struct resource puv3_pwm_resources[] = {
+        [0] = {
+                .start  = PKUNITY_OST_BASE + 0x80,
+                .end    = PKUNITY_OST_BASE + 0xff,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct resource puv3_uart0_resources[] = {
+        [0] = {
+                .start = PKUNITY_UART0_BASE,
+                .end   = PKUNITY_UART0_BASE + 0xff,
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_UART0,
+                .end   = IRQ_UART0,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static struct resource puv3_uart1_resources[] = {
+        [0] = {
+                .start = PKUNITY_UART1_BASE,
+                .end   = PKUNITY_UART1_BASE + 0xff,
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_UART1,
+                .end   = IRQ_UART1,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static struct resource puv3_umal_resources[] = {
+        [0] = {
+                .start = PKUNITY_UMAL_BASE,
+                .end   = PKUNITY_UMAL_BASE + 0x1fff,
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_UMAL,
+                .end   = IRQ_UMAL,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+#ifdef CONFIG_PUV3_PM
+
+#define SAVE(x)         sleep_save[SLEEP_SAVE_##x] = x
+#define RESTORE(x)      x = sleep_save[SLEEP_SAVE_##x]
+
+/*
+ * List of global PXA peripheral registers to preserve.
+ * More ones like CP and general purpose register values are preserved
+ * with the stack pointer in sleep.S.
+ */
+enum {
+        SLEEP_SAVE_PM_PLLDDRCFG,
+        SLEEP_SAVE_COUNT
+};
+
+
+static void puv3_cpu_pm_save(unsigned long *sleep_save)
+{
+/*      SAVE(PM_PLLDDRCFG); */
+}
+
+static void puv3_cpu_pm_restore(unsigned long *sleep_save)
+{
+/*      RESTORE(PM_PLLDDRCFG); */
+}
+
+static int puv3_cpu_pm_prepare(void)
+{
+        /* set resume return address */
+        PM_DIVCFG = virt_to_phys(puv3_cpu_resume);
+        return 0;
+}
+
+static void puv3_cpu_pm_enter(suspend_state_t state)
+{
+        /* Clear reset status */
+        RESETC_RSSR = RESETC_RSSR_HWR | RESETC_RSSR_WDR
+                        | RESETC_RSSR_SMR | RESETC_RSSR_SWR;
+
+        switch (state) {
+/*      case PM_SUSPEND_ON:
+                puv3_cpu_idle();
+                break; */
+        case PM_SUSPEND_MEM:
+                puv3_cpu_pm_prepare();
+                puv3_cpu_suspend(PM_PMCR_SFB);
+                break;
+        }
+}
+
+static int puv3_cpu_pm_valid(suspend_state_t state)
+{
+        return state == PM_SUSPEND_MEM;
+}
+
+static void puv3_cpu_pm_finish(void)
+{
+        /* ensure not to come back here if it wasn't intended */
+        /* PSPR = 0; */
+}
+
+static struct puv3_cpu_pm_fns puv3_cpu_pm_fnss = {
+        .save_count     = SLEEP_SAVE_COUNT,
+        .valid          = puv3_cpu_pm_valid,
+        .save           = puv3_cpu_pm_save,
+        .restore        = puv3_cpu_pm_restore,
+        .enter          = puv3_cpu_pm_enter,
+        .prepare        = puv3_cpu_pm_prepare,
+        .finish         = puv3_cpu_pm_finish,
+};
+
+static void __init puv3_init_pm(void)
+{
+        puv3_cpu_pm_fns = &puv3_cpu_pm_fnss;
+}
+#else
+static inline void puv3_init_pm(void) {}
+#endif
+
+void puv3_ps2_init(void)
+{
+        struct clk *bclk32;
+
+        bclk32 = clk_get(NULL, "BUS32_CLK");
+        PS2_CNT = clk_get_rate(bclk32) / 200000; /* should > 5us */
+}
+
+void __init puv3_core_init(void)
+{
+        puv3_init_pm();
+        puv3_ps2_init();
+
+        platform_device_register_simple("PKUnity-v3-RTC", -1,
+                        puv3_rtc_resources, ARRAY_SIZE(puv3_rtc_resources));
+        platform_device_register_simple("PKUnity-v3-UMAL", -1,
+                        puv3_umal_resources, ARRAY_SIZE(puv3_umal_resources));
+        platform_device_register_simple("PKUnity-v3-MMC", -1,
+                        puv3_mmc_resources, ARRAY_SIZE(puv3_mmc_resources));
+        platform_device_register_simple("PKUnity-v3-PWM", -1,
+                        puv3_pwm_resources, ARRAY_SIZE(puv3_pwm_resources));
+        platform_device_register_simple("PKUnity-v3-UART", 0,
+                        puv3_uart0_resources, ARRAY_SIZE(puv3_uart0_resources));
+        platform_device_register_simple("PKUnity-v3-UART", 1,
+                        puv3_uart1_resources, ARRAY_SIZE(puv3_uart1_resources));
+        platform_device_register_simple("PKUnity-v3-AC97", -1, NULL, 0);
+        platform_device_register_resndata(&platform_bus, "musb_hdrc", -1,
+                        puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources),
+                        &puv3_usb_plat, sizeof(puv3_usb_plat));
+}
+
diff --git a/arch/unicore32/kernel/puv3-nb0916.c b/arch/unicore32/kernel/puv3-nb0916.c
new file mode 100644
index 000000000000..a78e60420653
--- /dev/null
+++ b/arch/unicore32/kernel/puv3-nb0916.c
@@ -0,0 +1,145 @@
+/*
+ * linux/arch/unicore32/kernel/puv3-nb0916.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ *      Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
+ *      Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/sysdev.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/io.h>
+#include <linux/reboot.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/pwm_backlight.h>
+#include <linux/gpio.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+
+#include <mach/hardware.h>
+
+static struct physmap_flash_data physmap_flash_data = {
+        .width          = 1,
+};
+
+static struct resource physmap_flash_resource = {
+        .start          = 0xFFF80000,
+        .end            = 0xFFFFFFFF,
+        .flags          = IORESOURCE_MEM,
+};
+
+static struct resource puv3_i2c_resources[] = {
+        [0] = {
+                .start = PKUNITY_I2C_BASE,
+                .end   = PKUNITY_I2C_BASE + 0xff,
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_I2C,
+                .end   = IRQ_I2C,
+                .flags = IORESOURCE_IRQ,
+        }
+};
+
+static struct platform_pwm_backlight_data nb0916_backlight_data = {
+        .pwm_id         = 0,
+        .max_brightness = 100,
+        .dft_brightness = 100,
+        .pwm_period_ns  = 70 * 1024,
+};
+
+static struct gpio_keys_button nb0916_gpio_keys[] = {
+        {
+                .type   = EV_KEY,
+                .code   = KEY_POWER,
+                .gpio   = GPI_SOFF_REQ,
+                .desc   = "Power Button",
+                .wakeup = 1,
+                .active_low = 1,
+        },
+        {
+                .type   = EV_KEY,
+                .code   = BTN_TOUCH,
+                .gpio   = GPI_BTN_TOUCH,
+                .desc   = "Touchpad Button",
+                .wakeup = 1,
+                .active_low = 1,
+        },
+};
+
+static struct gpio_keys_platform_data nb0916_gpio_button_data = {
+        .buttons        = nb0916_gpio_keys,
+        .nbuttons       = ARRAY_SIZE(nb0916_gpio_keys),
+};
+
+static irqreturn_t nb0916_lcdcaseoff_handler(int irq, void *dev_id)
+{
+        if (gpio_get_value(GPI_LCD_CASE_OFF))
+                gpio_set_value(GPO_LCD_EN, 1);
+        else
+                gpio_set_value(GPO_LCD_EN, 0);
+
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t nb0916_overheat_handler(int irq, void *dev_id)
+{
+        machine_halt();
+        /* SYSTEM HALT, NO RETURN */
+        return IRQ_HANDLED;
+}
+
+static struct i2c_board_info __initdata puv3_i2c_devices[] = {
+        {       I2C_BOARD_INFO("lm75",          I2C_TAR_THERMAL),       },
+        {       I2C_BOARD_INFO("bq27200",       I2C_TAR_PWIC),          },
+        {       I2C_BOARD_INFO("24c02",         I2C_TAR_EEPROM),        },
+};
+
+int __init mach_nb0916_init(void)
+{
+        i2c_register_board_info(0, puv3_i2c_devices,
+                        ARRAY_SIZE(puv3_i2c_devices));
+
+        platform_device_register_simple("PKUnity-v3-I2C", -1,
+                        puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources));
+
+        platform_device_register_data(&platform_bus, "pwm-backlight", -1,
+                        &nb0916_backlight_data, sizeof(nb0916_backlight_data));
+
+        platform_device_register_data(&platform_bus, "gpio-keys", -1,
+                        &nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data));
+
+        platform_device_register_resndata(&platform_bus, "physmap-flash", -1,
+                        &physmap_flash_resource, 1,
+                        &physmap_flash_data, sizeof(physmap_flash_data));
+
+        if (request_irq(gpio_to_irq(GPI_LCD_CASE_OFF),
+                &nb0916_lcdcaseoff_handler,
+                IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+                "NB0916 lcd case off", NULL) < 0) {
+
+                printk(KERN_DEBUG "LCD-Case-OFF IRQ %d not available\n",
+                        gpio_to_irq(GPI_LCD_CASE_OFF));
+        }
+
+        if (request_irq(gpio_to_irq(GPI_OTP_INT), &nb0916_overheat_handler,
+                IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+                "NB0916 overheating protection", NULL) < 0) {
+
+                printk(KERN_DEBUG "Overheating Protection IRQ %d not available\n",
+                        gpio_to_irq(GPI_OTP_INT));
+        }
+
+        return 0;
+}
+
+subsys_initcall_sync(mach_nb0916_init);