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>

1 files changed, 270 insertions, 0 deletions

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));
+}
+