/*
* 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));
}
