/* * 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/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(readl(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 = io_v2p(PKUNITY_USB_BASE), .end = io_v2p(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 = io_v2p(PKUNITY_SDC_BASE), .end = io_v2p(PKUNITY_SDC_BASE) + 0xfff, .flags = IORESOURCE_MEM, }, [1] = { .start = IRQ_SDC, .end = IRQ_SDC, .flags = IORESOURCE_IRQ, }, }; static struct resource puv3_unigfx_resources[] = { [0] = { .start = io_v2p(PKUNITY_UNIGFX_BASE), .end = io_v2p(PKUNITY_UNIGFX_BASE) + 0xfff, .flags = IORESOURCE_MEM, }, }; static struct resource puv3_rtc_resources[] = { [0] = { .start = io_v2p(PKUNITY_RTC_BASE), .end = io_v2p(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 = io_v2p(PKUNITY_OST_BASE) + 0x80, .end = io_v2p(PKUNITY_OST_BASE) + 0xff, .flags = IORESOURCE_MEM, }, }; static struct resource puv3_uart0_resources[] = { [0] = { .start = io_v2p(PKUNITY_UART0_BASE), .end = io_v2p(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 = io_v2p(PKUNITY_UART1_BASE), .end = io_v2p(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 = io_v2p(PKUNITY_UMAL_BASE), .end = io_v2p(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 */ writel(virt_to_phys(puv3_cpu_resume), PM_DIVCFG); return 0; } static void puv3_cpu_pm_enter(suspend_state_t state) { /* Clear reset status */ writel(RESETC_RSSR_HWR | RESETC_RSSR_WDR | RESETC_RSSR_SMR | RESETC_RSSR_SWR, RESETC_RSSR); 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"); writel(clk_get_rate(bclk32) / 200000, PS2_CNT); /* 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-UNIGFX", -1, puv3_unigfx_resources, ARRAY_SIZE(puv3_unigfx_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(NULL, "musb_hdrc", -1, puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources), &puv3_usb_plat, sizeof(puv3_usb_plat)); }