280 lines
6.4 KiB
C
280 lines
6.4 KiB
C
/*
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* linux/arch/unicore32/kernel/puv3-core.c
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
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* Copyright (C) 2001-2010 Guan Xuetao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/amba/bus.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/cnt32_to_63.h>
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#include <linux/usb/musb.h>
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#include <asm/irq.h>
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#include <mach/hardware.h>
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#include <mach/pm.h>
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/*
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* This is the PKUnity sched_clock implementation. This has
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* a resolution of 271ns, and a maximum value of 32025597s (370 days).
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*
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* The return value is guaranteed to be monotonic in that range as
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* long as there is always less than 582 seconds between successive
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* calls to this function.
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*
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* ( * 1E9 / CLOCK_TICK_RATE ) -> about 2235/32
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*/
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unsigned long long sched_clock(void)
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{
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unsigned long long v = cnt32_to_63(readl(OST_OSCR));
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/* original conservative method, but overflow frequently
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* v *= NSEC_PER_SEC >> 12;
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* do_div(v, CLOCK_TICK_RATE >> 12);
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*/
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v = ((v & 0x7fffffffffffffffULL) * 2235) >> 5;
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return v;
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}
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static struct resource puv3_usb_resources[] = {
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/* order is significant! */
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{
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.start = io_v2p(PKUNITY_USB_BASE),
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.end = io_v2p(PKUNITY_USB_BASE) + 0x3ff,
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.flags = IORESOURCE_MEM,
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}, {
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.start = IRQ_USB,
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.flags = IORESOURCE_IRQ,
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}, {
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.start = IRQ_USB,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct musb_hdrc_config puv3_usb_config[] = {
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{
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.num_eps = 16,
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.multipoint = 1,
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#ifdef CONFIG_USB_INVENTRA_DMA
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.dma = 1,
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.dma_channels = 8,
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#endif
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},
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};
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static struct musb_hdrc_platform_data puv3_usb_plat = {
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.mode = MUSB_HOST,
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.min_power = 100,
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.clock = 0,
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.config = puv3_usb_config,
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};
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static struct resource puv3_mmc_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_SDC_BASE),
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.end = io_v2p(PKUNITY_SDC_BASE) + 0xfff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_SDC,
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.end = IRQ_SDC,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource puv3_unigfx_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_UNIGFX_BASE),
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.end = io_v2p(PKUNITY_UNIGFX_BASE) + 0xfff,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct resource puv3_rtc_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_RTC_BASE),
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.end = io_v2p(PKUNITY_RTC_BASE) + 0xff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_RTCAlarm,
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.end = IRQ_RTCAlarm,
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.flags = IORESOURCE_IRQ,
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},
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[2] = {
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.start = IRQ_RTC,
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.end = IRQ_RTC,
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.flags = IORESOURCE_IRQ
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}
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};
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static struct resource puv3_pwm_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_OST_BASE) + 0x80,
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.end = io_v2p(PKUNITY_OST_BASE) + 0xff,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct resource puv3_uart0_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_UART0_BASE),
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.end = io_v2p(PKUNITY_UART0_BASE) + 0xff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_UART0,
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.end = IRQ_UART0,
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.flags = IORESOURCE_IRQ
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}
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};
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static struct resource puv3_uart1_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_UART1_BASE),
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.end = io_v2p(PKUNITY_UART1_BASE) + 0xff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_UART1,
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.end = IRQ_UART1,
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.flags = IORESOURCE_IRQ
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}
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};
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static struct resource puv3_umal_resources[] = {
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[0] = {
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.start = io_v2p(PKUNITY_UMAL_BASE),
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.end = io_v2p(PKUNITY_UMAL_BASE) + 0x1fff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_UMAL,
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.end = IRQ_UMAL,
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.flags = IORESOURCE_IRQ
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}
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};
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#ifdef CONFIG_PUV3_PM
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#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
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#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
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/*
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* List of global PXA peripheral registers to preserve.
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* More ones like CP and general purpose register values are preserved
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* with the stack pointer in sleep.S.
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*/
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enum {
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SLEEP_SAVE_PM_PLLDDRCFG,
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SLEEP_SAVE_COUNT
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};
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static void puv3_cpu_pm_save(unsigned long *sleep_save)
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{
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/* SAVE(PM_PLLDDRCFG); */
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}
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static void puv3_cpu_pm_restore(unsigned long *sleep_save)
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{
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/* RESTORE(PM_PLLDDRCFG); */
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}
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static int puv3_cpu_pm_prepare(void)
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{
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/* set resume return address */
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writel(virt_to_phys(puv3_cpu_resume), PM_DIVCFG);
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return 0;
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}
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static void puv3_cpu_pm_enter(suspend_state_t state)
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{
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/* Clear reset status */
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writel(RESETC_RSSR_HWR | RESETC_RSSR_WDR
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| RESETC_RSSR_SMR | RESETC_RSSR_SWR, RESETC_RSSR);
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switch (state) {
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/* case PM_SUSPEND_ON:
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puv3_cpu_idle();
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break; */
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case PM_SUSPEND_MEM:
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puv3_cpu_pm_prepare();
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puv3_cpu_suspend(PM_PMCR_SFB);
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break;
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}
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}
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static int puv3_cpu_pm_valid(suspend_state_t state)
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{
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return state == PM_SUSPEND_MEM;
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}
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static void puv3_cpu_pm_finish(void)
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{
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/* ensure not to come back here if it wasn't intended */
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/* PSPR = 0; */
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}
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static struct puv3_cpu_pm_fns puv3_cpu_pm_fnss = {
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.save_count = SLEEP_SAVE_COUNT,
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.valid = puv3_cpu_pm_valid,
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.save = puv3_cpu_pm_save,
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.restore = puv3_cpu_pm_restore,
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.enter = puv3_cpu_pm_enter,
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.prepare = puv3_cpu_pm_prepare,
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.finish = puv3_cpu_pm_finish,
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};
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static void __init puv3_init_pm(void)
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{
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puv3_cpu_pm_fns = &puv3_cpu_pm_fnss;
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}
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#else
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static inline void puv3_init_pm(void) {}
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#endif
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void puv3_ps2_init(void)
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{
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struct clk *bclk32;
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bclk32 = clk_get(NULL, "BUS32_CLK");
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writel(clk_get_rate(bclk32) / 200000, PS2_CNT); /* should > 5us */
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}
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void __init puv3_core_init(void)
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{
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puv3_init_pm();
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puv3_ps2_init();
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platform_device_register_simple("PKUnity-v3-RTC", -1,
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puv3_rtc_resources, ARRAY_SIZE(puv3_rtc_resources));
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platform_device_register_simple("PKUnity-v3-UMAL", -1,
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puv3_umal_resources, ARRAY_SIZE(puv3_umal_resources));
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platform_device_register_simple("PKUnity-v3-MMC", -1,
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puv3_mmc_resources, ARRAY_SIZE(puv3_mmc_resources));
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platform_device_register_simple("PKUnity-v3-UNIGFX", -1,
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puv3_unigfx_resources, ARRAY_SIZE(puv3_unigfx_resources));
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platform_device_register_simple("PKUnity-v3-PWM", -1,
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puv3_pwm_resources, ARRAY_SIZE(puv3_pwm_resources));
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platform_device_register_simple("PKUnity-v3-UART", 0,
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puv3_uart0_resources, ARRAY_SIZE(puv3_uart0_resources));
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platform_device_register_simple("PKUnity-v3-UART", 1,
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puv3_uart1_resources, ARRAY_SIZE(puv3_uart1_resources));
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platform_device_register_simple("PKUnity-v3-AC97", -1, NULL, 0);
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platform_device_register_resndata(NULL, "musb_hdrc", -1,
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puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources),
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&puv3_usb_plat, sizeof(puv3_usb_plat));
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}
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