arch/arm/mach-pxa/pxa3xx.c - kernel/msm-4.9 - Gitiles

 /*
  * linux/arch/arm/mach-pxa/pxa3xx.c
  *
  * code specific to pxa3xx aka Monahans
  *
  * Copyright (C) 2006 Marvell International Ltd.
  *
  * 2007-09-02: eric miao <eric.miao@marvell.com>
  *             initial version
  *
  * 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/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
 #include <linux/irq.h>
 #include <linux/io.h>

 #include <asm/hardware.h>
 #include <asm/arch/pxa3xx-regs.h>
 #include <asm/arch/ohci.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/dma.h>
 #include <asm/arch/ssp.h>

 #include "generic.h"
 #include "devices.h"
 #include "clock.h"

 /* Crystal clock: 13MHz */
 #define BASE_CLK	13000000

 /* Ring Oscillator Clock: 60MHz */
 #define RO_CLK		60000000

 #define ACCR_D0CS	(1 << 26)

 /* crystal frequency to static memory controller multiplier (SMCFS) */
 static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };

 /* crystal frequency to HSIO bus frequency multiplier (HSS) */
 static unsigned char hss_mult[4] = { 8, 12, 16, 0 };

 /*
  * Get the clock frequency as reflected by CCSR and the turbo flag.
  * We assume these values have been applied via a fcs.
  * If info is not 0 we also display the current settings.
  */
 unsigned int pxa3xx_get_clk_frequency_khz(int info)
 {
 	unsigned long acsr, xclkcfg;
 	unsigned int t, xl, xn, hss, ro, XL, XN, CLK, HSS;

 	/* Read XCLKCFG register turbo bit */
 	__asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
 	t = xclkcfg & 0x1;

 	acsr = ACSR;

 	xl  = acsr & 0x1f;
 	xn  = (acsr >> 8) & 0x7;
 	hss = (acsr >> 14) & 0x3;

 	XL = xl * BASE_CLK;
 	XN = xn * XL;

 	ro = acsr & ACCR_D0CS;

 	CLK = (ro) ? RO_CLK : ((t) ? XN : XL);
 	HSS = (ro) ? RO_CLK : hss_mult[hss] * BASE_CLK;

 	if (info) {
 		pr_info("RO Mode clock: %d.%02dMHz (%sactive)\n",
 			RO_CLK / 1000000, (RO_CLK % 1000000) / 10000,
 			(ro) ? "" : "in");
 		pr_info("Run Mode clock: %d.%02dMHz (*%d)\n",
 			XL / 1000000, (XL % 1000000) / 10000, xl);
 		pr_info("Turbo Mode clock: %d.%02dMHz (*%d, %sactive)\n",
 			XN / 1000000, (XN % 1000000) / 10000, xn,
 			(t) ? "" : "in");
 		pr_info("HSIO bus clock: %d.%02dMHz\n",
 			HSS / 1000000, (HSS % 1000000) / 10000);
 	}

 	return CLK / 1000;
 }

 /*
  * Return the current static memory controller clock frequency
  * in units of 10kHz
  */
 unsigned int pxa3xx_get_memclk_frequency_10khz(void)
 {
 	unsigned long acsr;
 	unsigned int smcfs, clk = 0;

 	acsr = ACSR;

 	smcfs = (acsr >> 23) & 0x7;
 	clk = (acsr & ACCR_D0CS) ? RO_CLK : smcfs_mult[smcfs] * BASE_CLK;

 	return (clk / 10000);
 }

 /*
  * Return the current HSIO bus clock frequency
  */
 static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk)
 {
 	unsigned long acsr;
 	unsigned int hss, hsio_clk;

 	acsr = ACSR;

 	hss = (acsr >> 14) & 0x3;
 	hsio_clk = (acsr & ACCR_D0CS) ? RO_CLK : hss_mult[hss] * BASE_CLK;

 	return hsio_clk;
 }

 static void clk_pxa3xx_cken_enable(struct clk *clk)
 {
 	unsigned long mask = 1ul << (clk->cken & 0x1f);

 	local_irq_disable();

 	if (clk->cken < 32)
 		CKENA |= mask;
 	else
 		CKENB |= mask;

 	local_irq_enable();
 }

 static void clk_pxa3xx_cken_disable(struct clk *clk)
 {
 	unsigned long mask = 1ul << (clk->cken & 0x1f);

 	local_irq_disable();

 	if (clk->cken < 32)
 		CKENA &= ~mask;
 	else
 		CKENB &= ~mask;

 	local_irq_enable();
 }

 static const struct clkops clk_pxa3xx_cken_ops = {
 	.enable		= clk_pxa3xx_cken_enable,
 	.disable	= clk_pxa3xx_cken_disable,
 };

 static const struct clkops clk_pxa3xx_hsio_ops = {
 	.enable		= clk_pxa3xx_cken_enable,
 	.disable	= clk_pxa3xx_cken_disable,
 	.getrate	= clk_pxa3xx_hsio_getrate,
 };

 #define PXA3xx_CKEN(_name, _cken, _rate, _delay, _dev)	\
 	{						\
 		.name	= _name,			\
 		.dev	= _dev,				\
 		.ops	= &clk_pxa3xx_cken_ops,		\
 		.rate	= _rate,			\
 		.cken	= CKEN_##_cken,			\
 		.delay	= _delay,			\
 	}

 #define PXA3xx_CK(_name, _cken, _ops, _dev)		\
 	{						\
 		.name	= _name,			\
 		.dev	= _dev,				\
 		.ops	= _ops,				\
 		.cken	= CKEN_##_cken,			\
 	}

 static struct clk pxa3xx_clks[] = {
 	PXA3xx_CK("LCDCLK", LCD,    &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev),
 	PXA3xx_CK("CAMCLK", CAMERA, &clk_pxa3xx_hsio_ops, NULL),

 	PXA3xx_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
 	PXA3xx_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
 	PXA3xx_CKEN("UARTCLK", STUART, 14857000, 1, NULL),

 	PXA3xx_CKEN("I2CCLK", I2C,  32842000, 0, &pxa_device_i2c.dev),
 	PXA3xx_CKEN("UDCCLK", UDC,  48000000, 5, &pxa_device_udc.dev),
 	PXA3xx_CKEN("USBCLK", USBH, 48000000, 0, &pxa27x_device_ohci.dev),

 	PXA3xx_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
 	PXA3xx_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
 	PXA3xx_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
 	PXA3xx_CKEN("SSPCLK", SSP4, 13000000, 0, &pxa3xx_device_ssp4.dev),

 	PXA3xx_CKEN("MMCCLK", MMC1, 19500000, 0, &pxa_device_mci.dev),
 	PXA3xx_CKEN("MMCCLK", MMC2, 19500000, 0, &pxa3xx_device_mci2.dev),
 	PXA3xx_CKEN("MMCCLK", MMC3, 19500000, 0, &pxa3xx_device_mci3.dev),
 };

 #ifdef CONFIG_PM
 #define SLEEP_SAVE_SIZE	4

 #define ISRAM_START	0x5c000000
 #define ISRAM_SIZE	SZ_256K

 static void __iomem *sram;
 static unsigned long wakeup_src;

 static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
 {
 	pr_debug("PM: CKENA=%08x CKENB=%08x\n", CKENA, CKENB);

 	if (CKENA & (1 << CKEN_USBH)) {
 		printk(KERN_ERR "PM: USB host clock not stopped?\n");
 		CKENA &= ~(1 << CKEN_USBH);
 	}
 //	CKENA |= 1 << (CKEN_ISC & 31);

 	/*
 	 * Low power modes require the HSIO2 clock to be enabled.
 	 */
 	CKENB |= 1 << (CKEN_HSIO2 & 31);
 }

 static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save)
 {
 	CKENB &= ~(1 << (CKEN_HSIO2 & 31));
 }

 /*
  * Enter a standby mode (S0D1C2 or S0D2C2).  Upon wakeup, the dynamic
  * memory controller has to be reinitialised, so we place some code
  * in the SRAM to perform this function.
  *
  * We disable FIQs across the standby - otherwise, we might receive a
  * FIQ while the SDRAM is unavailable.
  */
 static void pxa3xx_cpu_standby(unsigned int pwrmode)
 {
 	extern const char pm_enter_standby_start[], pm_enter_standby_end[];
 	void (*fn)(unsigned int) = (void __force *)(sram + 0x8000);

 	memcpy_toio(sram + 0x8000, pm_enter_standby_start,
 		    pm_enter_standby_end - pm_enter_standby_start);

 	AD2D0SR = ~0;
 	AD2D1SR = ~0;
 	AD2D0ER = wakeup_src;
 	AD2D1ER = 0;
 	ASCR = ASCR;
 	ARSR = ARSR;

 	local_fiq_disable();
 	fn(pwrmode);
 	local_fiq_enable();

 	AD2D0ER = 0;
 	AD2D1ER = 0;

 	printk("PM: AD2D0SR=%08x ASCR=%08x\n", AD2D0SR, ASCR);
 }

 static void pxa3xx_cpu_pm_enter(suspend_state_t state)
 {
 	/*
 	 * Don't sleep if no wakeup sources are defined
 	 */
 	if (wakeup_src == 0)
 		return;

 	switch (state) {
 	case PM_SUSPEND_STANDBY:
 		pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2);
 		break;

 	case PM_SUSPEND_MEM:
 		break;
 	}
 }

 static int pxa3xx_cpu_pm_valid(suspend_state_t state)
 {
 	return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
 }

 static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
 	.save_size	= SLEEP_SAVE_SIZE,
 	.save		= pxa3xx_cpu_pm_save,
 	.restore	= pxa3xx_cpu_pm_restore,
 	.valid		= pxa3xx_cpu_pm_valid,
 	.enter		= pxa3xx_cpu_pm_enter,
 };

 static void __init pxa3xx_init_pm(void)
 {
 	sram = ioremap(ISRAM_START, ISRAM_SIZE);
 	if (!sram) {
 		printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n");
 		return;
 	}

 	/*
 	 * Since we copy wakeup code into the SRAM, we need to ensure
 	 * that it is preserved over the low power modes.  Note: bit 8
 	 * is undocumented in the developer manual, but must be set.
 	 */
 	AD1R |= ADXR_L2 | ADXR_R0;
 	AD2R |= ADXR_L2 | ADXR_R0;
 	AD3R |= ADXR_L2 | ADXR_R0;

 	/*
 	 * Clear the resume enable registers.
 	 */
 	AD1D0ER = 0;
 	AD2D0ER = 0;
 	AD2D1ER = 0;
 	AD3ER = 0;

 	pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns;
 }

 static int pxa3xx_set_wake(unsigned int irq, unsigned int on)
 {
 	unsigned long flags, mask = 0;

 	switch (irq) {
 	case IRQ_SSP3:
 		mask = ADXER_MFP_WSSP3;
 		break;
 	case IRQ_MSL:
 		mask = ADXER_WMSL0;
 		break;
 	case IRQ_USBH2:
 	case IRQ_USBH1:
 		mask = ADXER_WUSBH;
 		break;
 	case IRQ_KEYPAD:
 		mask = ADXER_WKP;
 		break;
 	case IRQ_AC97:
 		mask = ADXER_MFP_WAC97;
 		break;
 	case IRQ_USIM:
 		mask = ADXER_WUSIM0;
 		break;
 	case IRQ_SSP2:
 		mask = ADXER_MFP_WSSP2;
 		break;
 	case IRQ_I2C:
 		mask = ADXER_MFP_WI2C;
 		break;
 	case IRQ_STUART:
 		mask = ADXER_MFP_WUART3;
 		break;
 	case IRQ_BTUART:
 		mask = ADXER_MFP_WUART2;
 		break;
 	case IRQ_FFUART:
 		mask = ADXER_MFP_WUART1;
 		break;
 	case IRQ_MMC:
 		mask = ADXER_MFP_WMMC1;
 		break;
 	case IRQ_SSP:
 		mask = ADXER_MFP_WSSP1;
 		break;
 	case IRQ_RTCAlrm:
 		mask = ADXER_WRTC;
 		break;
 	case IRQ_SSP4:
 		mask = ADXER_MFP_WSSP4;
 		break;
 	case IRQ_TSI:
 		mask = ADXER_WTSI;
 		break;
 	case IRQ_USIM2:
 		mask = ADXER_WUSIM1;
 		break;
 	case IRQ_MMC2:
 		mask = ADXER_MFP_WMMC2;
 		break;
 	case IRQ_NAND:
 		mask = ADXER_MFP_WFLASH;
 		break;
 	case IRQ_USB2:
 		mask = ADXER_WUSB2;
 		break;
 	case IRQ_WAKEUP0:
 		mask = ADXER_WEXTWAKE0;
 		break;
 	case IRQ_WAKEUP1:
 		mask = ADXER_WEXTWAKE1;
 		break;
 	case IRQ_MMC3:
 		mask = ADXER_MFP_GEN12;
 		break;
 	}

 	local_irq_save(flags);
 	if (on)
 		wakeup_src |= mask;
 	else
 		wakeup_src &= ~mask;
 	local_irq_restore(flags);

 	return 0;
 }

 static void pxa3xx_init_irq_pm(void)
 {
 	pxa_init_irq_set_wake(pxa3xx_set_wake);
 }

 #else
 static inline void pxa3xx_init_pm(void) {}
 static inline void pxa3xx_init_irq_pm(void) {}
 #endif

 void __init pxa3xx_init_irq(void)
 {
 	/* enable CP6 access */
 	u32 value;
 	__asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value));
 	value |= (1 << 6);
 	__asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));

 	pxa_init_irq_low();
 	pxa_init_irq_high();
 	pxa_init_irq_gpio(128);
 	pxa3xx_init_irq_pm();
 }

 /*
  * device registration specific to PXA3xx.
  */

 static struct platform_device *devices[] __initdata = {
 	&pxa_device_udc,
 	&pxa_device_ffuart,
 	&pxa_device_btuart,
 	&pxa_device_stuart,
 	&pxa_device_i2s,
 	&pxa_device_rtc,
 	&pxa27x_device_ssp1,
 	&pxa27x_device_ssp2,
 	&pxa27x_device_ssp3,
 	&pxa3xx_device_ssp4,
 };

 static int __init pxa3xx_init(void)
 {
 	int ret = 0;

 	if (cpu_is_pxa3xx()) {
 		clks_register(pxa3xx_clks, ARRAY_SIZE(pxa3xx_clks));

 		if ((ret = pxa_init_dma(32)))
 			return ret;

 		pxa3xx_init_pm();

 		return platform_add_devices(devices, ARRAY_SIZE(devices));
 	}
 	return 0;
 }

 subsys_initcall(pxa3xx_init);
	/*
	* linux/arch/arm/mach-pxa/pxa3xx.c
	*
	* code specific to pxa3xx aka Monahans
	*
	* Copyright (C) 2006 Marvell International Ltd.
	*
	* 2007-09-02: eric miao <eric.miao@marvell.com>
	* initial version
	*
	* 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/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/pm.h>
	#include <linux/platform_device.h>
	#include <linux/irq.h>
	#include <linux/io.h>

	#include <asm/hardware.h>
	#include <asm/arch/pxa3xx-regs.h>
	#include <asm/arch/ohci.h>
	#include <asm/arch/pm.h>
	#include <asm/arch/dma.h>
	#include <asm/arch/ssp.h>

	#include "generic.h"
	#include "devices.h"
	#include "clock.h"

	/* Crystal clock: 13MHz */
	#define BASE_CLK 13000000

	/* Ring Oscillator Clock: 60MHz */
	#define RO_CLK 60000000

	#define ACCR_D0CS (1 << 26)

	/* crystal frequency to static memory controller multiplier (SMCFS) */
	static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };

	/* crystal frequency to HSIO bus frequency multiplier (HSS) */
	static unsigned char hss_mult[4] = { 8, 12, 16, 0 };

	/*
	* Get the clock frequency as reflected by CCSR and the turbo flag.
	* We assume these values have been applied via a fcs.
	* If info is not 0 we also display the current settings.
	*/
	unsigned int pxa3xx_get_clk_frequency_khz(int info)
	{
	unsigned long acsr, xclkcfg;
	unsigned int t, xl, xn, hss, ro, XL, XN, CLK, HSS;

	/* Read XCLKCFG register turbo bit */
	__asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
	t = xclkcfg & 0x1;

	acsr = ACSR;

	xl = acsr & 0x1f;
	xn = (acsr >> 8) & 0x7;
	hss = (acsr >> 14) & 0x3;

	XL = xl * BASE_CLK;
	XN = xn * XL;

	ro = acsr & ACCR_D0CS;

	CLK = (ro) ? RO_CLK : ((t) ? XN : XL);
	HSS = (ro) ? RO_CLK : hss_mult[hss] * BASE_CLK;

	if (info) {
	pr_info("RO Mode clock: %d.%02dMHz (%sactive)\n",
	RO_CLK / 1000000, (RO_CLK % 1000000) / 10000,
	(ro) ? "" : "in");
	pr_info("Run Mode clock: %d.%02dMHz (*%d)\n",
	XL / 1000000, (XL % 1000000) / 10000, xl);
	pr_info("Turbo Mode clock: %d.%02dMHz (*%d, %sactive)\n",
	XN / 1000000, (XN % 1000000) / 10000, xn,
	(t) ? "" : "in");
	pr_info("HSIO bus clock: %d.%02dMHz\n",
	HSS / 1000000, (HSS % 1000000) / 10000);
	}

	return CLK / 1000;
	}

	/*
	* Return the current static memory controller clock frequency
	* in units of 10kHz
	*/
	unsigned int pxa3xx_get_memclk_frequency_10khz(void)
	{
	unsigned long acsr;
	unsigned int smcfs, clk = 0;

	acsr = ACSR;

	smcfs = (acsr >> 23) & 0x7;
	clk = (acsr & ACCR_D0CS) ? RO_CLK : smcfs_mult[smcfs] * BASE_CLK;

	return (clk / 10000);
	}

	/*
	* Return the current HSIO bus clock frequency
	*/
	static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk)
	{
	unsigned long acsr;
	unsigned int hss, hsio_clk;

	acsr = ACSR;

	hss = (acsr >> 14) & 0x3;
	hsio_clk = (acsr & ACCR_D0CS) ? RO_CLK : hss_mult[hss] * BASE_CLK;

	return hsio_clk;
	}

	static void clk_pxa3xx_cken_enable(struct clk *clk)
	{
	unsigned long mask = 1ul << (clk->cken & 0x1f);

	local_irq_disable();

	if (clk->cken < 32)
	CKENA \|= mask;
	else
	CKENB \|= mask;

	local_irq_enable();
	}

	static void clk_pxa3xx_cken_disable(struct clk *clk)
	{
	unsigned long mask = 1ul << (clk->cken & 0x1f);

	local_irq_disable();

	if (clk->cken < 32)
	CKENA &= ~mask;
	else
	CKENB &= ~mask;

	local_irq_enable();
	}

	static const struct clkops clk_pxa3xx_cken_ops = {
	.enable = clk_pxa3xx_cken_enable,
	.disable = clk_pxa3xx_cken_disable,
	};

	static const struct clkops clk_pxa3xx_hsio_ops = {
	.enable = clk_pxa3xx_cken_enable,
	.disable = clk_pxa3xx_cken_disable,
	.getrate = clk_pxa3xx_hsio_getrate,
	};

	#define PXA3xx_CKEN(_name, _cken, _rate, _delay, _dev) \
	{ \
	.name = _name, \
	.dev = _dev, \
	.ops = &clk_pxa3xx_cken_ops, \
	.rate = _rate, \
	.cken = CKEN_##_cken, \
	.delay = _delay, \
	}

	#define PXA3xx_CK(_name, _cken, _ops, _dev) \
	{ \
	.name = _name, \
	.dev = _dev, \
	.ops = _ops, \
	.cken = CKEN_##_cken, \
	}

	static struct clk pxa3xx_clks[] = {
	PXA3xx_CK("LCDCLK", LCD, &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev),
	PXA3xx_CK("CAMCLK", CAMERA, &clk_pxa3xx_hsio_ops, NULL),

	PXA3xx_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
	PXA3xx_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
	PXA3xx_CKEN("UARTCLK", STUART, 14857000, 1, NULL),

	PXA3xx_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
	PXA3xx_CKEN("UDCCLK", UDC, 48000000, 5, &pxa_device_udc.dev),
	PXA3xx_CKEN("USBCLK", USBH, 48000000, 0, &pxa27x_device_ohci.dev),

	PXA3xx_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
	PXA3xx_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
	PXA3xx_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
	PXA3xx_CKEN("SSPCLK", SSP4, 13000000, 0, &pxa3xx_device_ssp4.dev),

	PXA3xx_CKEN("MMCCLK", MMC1, 19500000, 0, &pxa_device_mci.dev),
	PXA3xx_CKEN("MMCCLK", MMC2, 19500000, 0, &pxa3xx_device_mci2.dev),
	PXA3xx_CKEN("MMCCLK", MMC3, 19500000, 0, &pxa3xx_device_mci3.dev),
	};

	#ifdef CONFIG_PM
	#define SLEEP_SAVE_SIZE 4

	#define ISRAM_START 0x5c000000
	#define ISRAM_SIZE SZ_256K

	static void __iomem *sram;
	static unsigned long wakeup_src;

	static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
	{
	pr_debug("PM: CKENA=%08x CKENB=%08x\n", CKENA, CKENB);

	if (CKENA & (1 << CKEN_USBH)) {
	printk(KERN_ERR "PM: USB host clock not stopped?\n");
	CKENA &= ~(1 << CKEN_USBH);
	}
	// CKENA \|= 1 << (CKEN_ISC & 31);

	/*
	* Low power modes require the HSIO2 clock to be enabled.
	*/
	CKENB \|= 1 << (CKEN_HSIO2 & 31);
	}

	static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save)
	{
	CKENB &= ~(1 << (CKEN_HSIO2 & 31));
	}

	/*
	* Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic
	* memory controller has to be reinitialised, so we place some code
	* in the SRAM to perform this function.
	*
	* We disable FIQs across the standby - otherwise, we might receive a
	* FIQ while the SDRAM is unavailable.
	*/
	static void pxa3xx_cpu_standby(unsigned int pwrmode)
	{
	extern const char pm_enter_standby_start[], pm_enter_standby_end[];
	void (fn)(unsigned int) = (void __force )(sram + 0x8000);

	memcpy_toio(sram + 0x8000, pm_enter_standby_start,
	pm_enter_standby_end - pm_enter_standby_start);

	AD2D0SR = ~0;
	AD2D1SR = ~0;
	AD2D0ER = wakeup_src;
	AD2D1ER = 0;
	ASCR = ASCR;
	ARSR = ARSR;

	local_fiq_disable();
	fn(pwrmode);
	local_fiq_enable();

	AD2D0ER = 0;
	AD2D1ER = 0;

	printk("PM: AD2D0SR=%08x ASCR=%08x\n", AD2D0SR, ASCR);
	}

	static void pxa3xx_cpu_pm_enter(suspend_state_t state)
	{
	/*
	* Don't sleep if no wakeup sources are defined
	*/
	if (wakeup_src == 0)
	return;

	switch (state) {
	case PM_SUSPEND_STANDBY:
	pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2);
	break;

	case PM_SUSPEND_MEM:
	break;
	}
	}

	static int pxa3xx_cpu_pm_valid(suspend_state_t state)
	{
	return state == PM_SUSPEND_MEM \|\| state == PM_SUSPEND_STANDBY;
	}

	static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
	.save_size = SLEEP_SAVE_SIZE,
	.save = pxa3xx_cpu_pm_save,
	.restore = pxa3xx_cpu_pm_restore,
	.valid = pxa3xx_cpu_pm_valid,
	.enter = pxa3xx_cpu_pm_enter,
	};

	static void __init pxa3xx_init_pm(void)
	{
	sram = ioremap(ISRAM_START, ISRAM_SIZE);
	if (!sram) {
	printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n");
	return;
	}

	/*
	* Since we copy wakeup code into the SRAM, we need to ensure
	* that it is preserved over the low power modes. Note: bit 8
	* is undocumented in the developer manual, but must be set.
	*/
	AD1R \|= ADXR_L2 \| ADXR_R0;
	AD2R \|= ADXR_L2 \| ADXR_R0;
	AD3R \|= ADXR_L2 \| ADXR_R0;

	/*
	* Clear the resume enable registers.
	*/
	AD1D0ER = 0;
	AD2D0ER = 0;
	AD2D1ER = 0;
	AD3ER = 0;

	pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns;
	}

	static int pxa3xx_set_wake(unsigned int irq, unsigned int on)
	{
	unsigned long flags, mask = 0;

	switch (irq) {
	case IRQ_SSP3:
	mask = ADXER_MFP_WSSP3;
	break;
	case IRQ_MSL:
	mask = ADXER_WMSL0;
	break;
	case IRQ_USBH2:
	case IRQ_USBH1:
	mask = ADXER_WUSBH;
	break;
	case IRQ_KEYPAD:
	mask = ADXER_WKP;
	break;
	case IRQ_AC97:
	mask = ADXER_MFP_WAC97;
	break;
	case IRQ_USIM:
	mask = ADXER_WUSIM0;
	break;
	case IRQ_SSP2:
	mask = ADXER_MFP_WSSP2;
	break;
	case IRQ_I2C:
	mask = ADXER_MFP_WI2C;
	break;
	case IRQ_STUART:
	mask = ADXER_MFP_WUART3;
	break;
	case IRQ_BTUART:
	mask = ADXER_MFP_WUART2;
	break;
	case IRQ_FFUART:
	mask = ADXER_MFP_WUART1;
	break;
	case IRQ_MMC:
	mask = ADXER_MFP_WMMC1;
	break;
	case IRQ_SSP:
	mask = ADXER_MFP_WSSP1;
	break;
	case IRQ_RTCAlrm:
	mask = ADXER_WRTC;
	break;
	case IRQ_SSP4:
	mask = ADXER_MFP_WSSP4;
	break;
	case IRQ_TSI:
	mask = ADXER_WTSI;
	break;
	case IRQ_USIM2:
	mask = ADXER_WUSIM1;
	break;
	case IRQ_MMC2:
	mask = ADXER_MFP_WMMC2;
	break;
	case IRQ_NAND:
	mask = ADXER_MFP_WFLASH;
	break;
	case IRQ_USB2:
	mask = ADXER_WUSB2;
	break;
	case IRQ_WAKEUP0:
	mask = ADXER_WEXTWAKE0;
	break;
	case IRQ_WAKEUP1:
	mask = ADXER_WEXTWAKE1;
	break;
	case IRQ_MMC3:
	mask = ADXER_MFP_GEN12;
	break;
	}

	local_irq_save(flags);
	if (on)
	wakeup_src \|= mask;
	else
	wakeup_src &= ~mask;
	local_irq_restore(flags);

	return 0;
	}

	static void pxa3xx_init_irq_pm(void)
	{
	pxa_init_irq_set_wake(pxa3xx_set_wake);
	}

	#else
	static inline void pxa3xx_init_pm(void) {}
	static inline void pxa3xx_init_irq_pm(void) {}
	#endif

	void __init pxa3xx_init_irq(void)
	{
	/* enable CP6 access */
	u32 value;
	__asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value));
	value \|= (1 << 6);
	__asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));

	pxa_init_irq_low();
	pxa_init_irq_high();
	pxa_init_irq_gpio(128);
	pxa3xx_init_irq_pm();
	}

	/*
	* device registration specific to PXA3xx.
	*/

	static struct platform_device *devices[] __initdata = {
	&pxa_device_udc,
	&pxa_device_ffuart,
	&pxa_device_btuart,
	&pxa_device_stuart,
	&pxa_device_i2s,
	&pxa_device_rtc,
	&pxa27x_device_ssp1,
	&pxa27x_device_ssp2,
	&pxa27x_device_ssp3,
	&pxa3xx_device_ssp4,
	};

	static int __init pxa3xx_init(void)
	{
	int ret = 0;

	if (cpu_is_pxa3xx()) {
	clks_register(pxa3xx_clks, ARRAY_SIZE(pxa3xx_clks));

	if ((ret = pxa_init_dma(32)))
	return ret;

	pxa3xx_init_pm();

	return platform_add_devices(devices, ARRAY_SIZE(devices));
	}
	return 0;
	}

	subsys_initcall(pxa3xx_init);