280 строки
6.4 KiB
C
280 строки
6.4 KiB
C
/*
|
|
* 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));
|
|
}
|
|
|