[deliverable/linux.git] / arch / arm / mach-pxa / pxa3xx.c

/*
 * 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 <linux/sysdev.h>

#include <mach/hardware.h>
#include <mach/pxa3xx-regs.h>
#include <mach/reset.h>
#include <mach/ohci.h>
#include <mach/pm.h>
#include <mach/dma.h>
#include <mach/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)
#define ACCR_PCCE	(1 << 11)

/* 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);
}

void pxa3xx_clear_reset_status(unsigned int mask)
{
	/* RESET_STATUS_* has a 1:1 mapping with ARSR */
	ARSR = mask;
}

/*
 * Return the current AC97 clock frequency.
 */
static unsigned long clk_pxa3xx_ac97_getrate(struct clk *clk)
{
	unsigned long rate = 312000000;
	unsigned long ac97_div;

	ac97_div = AC97_DIV;

	/* This may loose precision for some rates but won't for the
	 * standard 24.576MHz.
	 */
	rate /= (ac97_div >> 12) & 0x7fff;
	rate *= (ac97_div & 0xfff);

	return rate;
}

/*
 * 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;
}

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

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

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

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

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,
};

static const struct clkops clk_pxa3xx_ac97_ops = {
	.enable		= clk_pxa3xx_cken_enable,
	.disable	= clk_pxa3xx_cken_disable,
	.getrate	= clk_pxa3xx_ac97_getrate,
};

static void clk_pout_enable(struct clk *clk)
{
	OSCC |= OSCC_PEN;
}

static void clk_pout_disable(struct clk *clk)
{
	OSCC &= ~OSCC_PEN;
}

static const struct clkops clk_pout_ops = {
	.enable		= clk_pout_enable,
	.disable	= clk_pout_disable,
};

static void clk_dummy_enable(struct clk *clk)
{
}

static void clk_dummy_disable(struct clk *clk)
{
}

static const struct clkops clk_dummy_ops = {
	.enable		= clk_dummy_enable,
	.disable	= clk_dummy_disable,
};

static struct clk pxa3xx_clks[] = {
	{
		.name           = "CLK_POUT",
		.ops            = &clk_pout_ops,
		.rate           = 13000000,
		.delay          = 70,
	},

	/* Power I2C clock is always on */
	{
		.name		= "I2CCLK",
		.ops		= &clk_dummy_ops,
		.dev		= &pxa3xx_device_i2c_power.dev,
	},

	PXA3xx_CK("LCDCLK",  LCD,    &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev),
	PXA3xx_CK("CAMCLK",  CAMERA, &clk_pxa3xx_hsio_ops, NULL),
	PXA3xx_CK("AC97CLK", AC97,   &clk_pxa3xx_ac97_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, &pxa27x_device_udc.dev),
	PXA3xx_CKEN("USBCLK", USBH, 48000000, 0, &pxa27x_device_ohci.dev),
	PXA3xx_CKEN("KBDCLK", KEYPAD,  32768, 0, &pxa27x_device_keypad.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("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
	PXA3xx_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),

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

#ifdef CONFIG_PM

#define ISRAM_START	0x5c000000
#define ISRAM_SIZE	SZ_256K

static void __iomem *sram;
static unsigned long wakeup_src;

#define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x
#define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]

enum {	SLEEP_SAVE_CKENA,
	SLEEP_SAVE_CKENB,
	SLEEP_SAVE_ACCR,

	SLEEP_SAVE_COUNT,
};

static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
{
	SAVE(CKENA);
	SAVE(CKENB);
	SAVE(ACCR);
}

static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save)
{
	RESTORE(ACCR);
	RESTORE(CKENA);
	RESTORE(CKENB);
}

/*
 * 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;
}

/*
 * NOTE:  currently, the OBM (OEM Boot Module) binary comes along with
 * PXA3xx development kits assumes that the resuming process continues
 * with the address stored within the first 4 bytes of SDRAM. The PSPR
 * register is used privately by BootROM and OBM, and _must_ be set to
 * 0x5c014000 for the moment.
 */
static void pxa3xx_cpu_pm_suspend(void)
{
	volatile unsigned long *p = (volatile void *)0xc0000000;
	unsigned long saved_data = *p;

	extern void pxa3xx_cpu_suspend(void);
	extern void pxa3xx_cpu_resume(void);

	/* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */
	CKENA |= (1 << CKEN_BOOT) | (1 << CKEN_TPM);
	CKENB |= 1 << (CKEN_HSIO2 & 0x1f);

	/* clear and setup wakeup source */
	AD3SR = ~0;
	AD3ER = wakeup_src;
	ASCR = ASCR;
	ARSR = ARSR;

	PCFR |= (1u << 13);			/* L1_DIS */
	PCFR &= ~((1u << 12) | (1u << 1));	/* L0_EN | SL_ROD */

	PSPR = 0x5c014000;

	/* overwrite with the resume address */
	*p = virt_to_phys(pxa3xx_cpu_resume);

	pxa3xx_cpu_suspend();

	*p = saved_data;

	AD3ER = 0;
}

static void pxa3xx_cpu_pm_enter(suspend_state_t state)
{
	/*
	 * Don't sleep if no wakeup sources are defined
	 */
	if (wakeup_src == 0) {
		printk(KERN_ERR "Not suspending: no wakeup sources\n");
		return;
	}

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

	case PM_SUSPEND_MEM:
		pxa3xx_cpu_pm_suspend();
		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_count	= SLEEP_SAVE_COUNT,
	.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;
	default:
		return -EINVAL;
	}

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

	return 0;
}
#else
static inline void pxa3xx_init_pm(void) {}
#define pxa3xx_set_wake	NULL
#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(56, pxa3xx_set_wake);
	pxa_init_gpio(128, NULL);
}

/*
 * device registration specific to PXA3xx.
 */

void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info)
{
	pxa3xx_device_i2c_power.dev.platform_data = info;
}

static struct platform_device *devices[] __initdata = {
/*	&pxa_device_udc,	The UDC driver is PXA25x only */
	&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,
	&pxa27x_device_pwm0,
	&pxa27x_device_pwm1,
	&pxa3xx_device_i2c_power,
};

static struct sys_device pxa3xx_sysdev[] = {
	{
		.cls	= &pxa_irq_sysclass,
	}, {
		.cls	= &pxa3xx_mfp_sysclass,
	}, {
		.cls	= &pxa_gpio_sysclass,
	},
};

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

	if (cpu_is_pxa3xx()) {

		reset_status = ARSR;

		/*
		 * clear RDH bit every time after reset
		 *
		 * Note: the last 3 bits DxS are write-1-to-clear so carefully
		 * preserve them here in case they will be referenced later
		 */
		ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);

		clks_register(pxa3xx_clks, ARRAY_SIZE(pxa3xx_clks));

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

		pxa3xx_init_pm();

		for (i = 0; i < ARRAY_SIZE(pxa3xx_sysdev); i++) {
			ret = sysdev_register(&pxa3xx_sysdev[i]);
			if (ret)
				pr_err("failed to register sysdev[%d]\n", i);
		}

		ret = platform_add_devices(devices, ARRAY_SIZE(devices));
	}

	return ret;
}

postcore_initcall(pxa3xx_init);
Commit	Line	Data
2c8086a5	1	/*
	2	* linux/arch/arm/mach-pxa/pxa3xx.c
	3	*
	4	* code specific to pxa3xx aka Monahans
	5	*
	6	* Copyright (C) 2006 Marvell International Ltd.
	7	*
e9bba8ee	8	* 2007-09-02: eric miao <eric.miao@marvell.com>
2c8086a5	9	* initial version
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
	18	#include <linux/init.h>
	19	#include <linux/pm.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/irq.h>
7b5dea12	22	#include <linux/io.h>
c0165504	23	#include <linux/sysdev.h>
2c8086a5	24
a09e64fb RK	25	#include <mach/hardware.h>
a09e64fb RK	26	#include <mach/pxa3xx-regs.h>
afd2fc02	27	#include <mach/reset.h>
a09e64fb RK	28	#include <mach/ohci.h>
	29	#include <mach/pm.h>
	30	#include <mach/dma.h>
	31	#include <mach/ssp.h>
2c8086a5	32
	33	#include "generic.h"
	34	#include "devices.h"
	35	#include "clock.h"
	36
	37	/* Crystal clock: 13MHz */
	38	#define BASE_CLK 13000000
	39
	40	/* Ring Oscillator Clock: 60MHz */
	41	#define RO_CLK 60000000
	42
	43	#define ACCR_D0CS (1 << 26)
c4d1fb62	44	#define ACCR_PCCE (1 << 11)
2c8086a5	45
	46	/* crystal frequency to static memory controller multiplier (SMCFS) */
	47	static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };
	48
	49	/* crystal frequency to HSIO bus frequency multiplier (HSS) */
	50	static unsigned char hss_mult[4] = { 8, 12, 16, 0 };
	51
	52	/*
	53	* Get the clock frequency as reflected by CCSR and the turbo flag.
	54	* We assume these values have been applied via a fcs.
	55	* If info is not 0 we also display the current settings.
	56	*/
	57	unsigned int pxa3xx_get_clk_frequency_khz(int info)
	58	{
	59	unsigned long acsr, xclkcfg;
	60	unsigned int t, xl, xn, hss, ro, XL, XN, CLK, HSS;
	61
	62	/* Read XCLKCFG register turbo bit */
	63	__asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
	64	t = xclkcfg & 0x1;
	65
	66	acsr = ACSR;
	67
	68	xl = acsr & 0x1f;
	69	xn = (acsr >> 8) & 0x7;
	70	hss = (acsr >> 14) & 0x3;
	71
	72	XL = xl * BASE_CLK;
	73	XN = xn * XL;
	74
	75	ro = acsr & ACCR_D0CS;
	76
	77	CLK = (ro) ? RO_CLK : ((t) ? XN : XL);
	78	HSS = (ro) ? RO_CLK : hss_mult[hss] * BASE_CLK;
	79
	80	if (info) {
	81	pr_info("RO Mode clock: %d.%02dMHz (%sactive)\n",
	82	RO_CLK / 1000000, (RO_CLK % 1000000) / 10000,
	83	(ro) ? "" : "in");
	84	pr_info("Run Mode clock: %d.%02dMHz (*%d)\n",
	85	XL / 1000000, (XL % 1000000) / 10000, xl);
	86	pr_info("Turbo Mode clock: %d.%02dMHz (*%d, %sactive)\n",
	87	XN / 1000000, (XN % 1000000) / 10000, xn,
	88	(t) ? "" : "in");
	89	pr_info("HSIO bus clock: %d.%02dMHz\n",
	90	HSS / 1000000, (HSS % 1000000) / 10000);
	91	}
	92
6232be32	93	return CLK / 1000;
2c8086a5	94	}
	95
	96	/*
	97	* Return the current static memory controller clock frequency
	98	* in units of 10kHz
	99	*/
	100	unsigned int pxa3xx_get_memclk_frequency_10khz(void)
	101	{
	102	unsigned long acsr;
	103	unsigned int smcfs, clk = 0;
	104
	105	acsr = ACSR;
	106
	107	smcfs = (acsr >> 23) & 0x7;
	108	clk = (acsr & ACCR_D0CS) ? RO_CLK : smcfs_mult[smcfs] * BASE_CLK;
	109
	110	return (clk / 10000);
	111	}
	112
04fef228 EM	113	void pxa3xx_clear_reset_status(unsigned int mask)
	114	{
	115	/* RESET_STATUS_* has a 1:1 mapping with ARSR */
	116	ARSR = mask;
	117	}
	118
60bfe7fa MB	119	/*
	120	* Return the current AC97 clock frequency.
	121	*/
	122	static unsigned long clk_pxa3xx_ac97_getrate(struct clk *clk)
	123	{
	124	unsigned long rate = 312000000;
	125	unsigned long ac97_div;
	126
	127	ac97_div = AC97_DIV;
	128
	129	/* This may loose precision for some rates but won't for the
	130	* standard 24.576MHz.
	131	*/
	132	rate /= (ac97_div >> 12) & 0x7fff;
	133	rate *= (ac97_div & 0xfff);
	134
	135	return rate;
	136	}
	137
2c8086a5	138	/*
	139	* Return the current HSIO bus clock frequency
	140	*/
	141	static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk)
	142	{
	143	unsigned long acsr;
	144	unsigned int hss, hsio_clk;
	145
	146	acsr = ACSR;
	147
	148	hss = (acsr >> 14) & 0x3;
	149	hsio_clk = (acsr & ACCR_D0CS) ? RO_CLK : hss_mult[hss] * BASE_CLK;
	150
	151	return hsio_clk;
	152	}
	153
7a2c5cb0	154	void clk_pxa3xx_cken_enable(struct clk *clk)
2c8086a5	155	{
	156	unsigned long mask = 1ul << (clk->cken & 0x1f);
	157
2c8086a5	158	if (clk->cken < 32)
	159	CKENA \|= mask;
	160	else
	161	CKENB \|= mask;
2c8086a5	162	}
2c8086a5	163
7a2c5cb0	164	void clk_pxa3xx_cken_disable(struct clk *clk)
2c8086a5	165	{
	166	unsigned long mask = 1ul << (clk->cken & 0x1f);
	167
2c8086a5	168	if (clk->cken < 32)
	169	CKENA &= ~mask;
	170	else
	171	CKENB &= ~mask;
2c8086a5	172	}
2c8086a5	173
7a2c5cb0	174	const struct clkops clk_pxa3xx_cken_ops = {
2a0d7187	175	.enable = clk_pxa3xx_cken_enable,
	176	.disable = clk_pxa3xx_cken_disable,
	177	};
	178
2c8086a5	179	static const struct clkops clk_pxa3xx_hsio_ops = {
	180	.enable = clk_pxa3xx_cken_enable,
	181	.disable = clk_pxa3xx_cken_disable,
	182	.getrate = clk_pxa3xx_hsio_getrate,
	183	};
	184
60bfe7fa MB	185	static const struct clkops clk_pxa3xx_ac97_ops = {
	186	.enable = clk_pxa3xx_cken_enable,
	187	.disable = clk_pxa3xx_cken_disable,
	188	.getrate = clk_pxa3xx_ac97_getrate,
	189	};
	190
dcc88a17 MB	191	static void clk_pout_enable(struct clk *clk)
	192	{
	193	OSCC \|= OSCC_PEN;
	194	}
	195
	196	static void clk_pout_disable(struct clk *clk)
	197	{
	198	OSCC &= ~OSCC_PEN;
	199	}
	200
	201	static const struct clkops clk_pout_ops = {
	202	.enable = clk_pout_enable,
	203	.disable = clk_pout_disable,
	204	};
	205
9ba63c4f MR	206	static void clk_dummy_enable(struct clk *clk)
	207	{
	208	}
	209
	210	static void clk_dummy_disable(struct clk *clk)
	211	{
	212	}
	213
	214	static const struct clkops clk_dummy_ops = {
	215	.enable = clk_dummy_enable,
	216	.disable = clk_dummy_disable,
	217	};
	218
2c8086a5	219	static struct clk pxa3xx_clks[] = {
dcc88a17 MB	220	{
	221	.name = "CLK_POUT",
	222	.ops = &clk_pout_ops,
	223	.rate = 13000000,
	224	.delay = 70,
	225	},
	226
9ba63c4f MR	227	/* Power I2C clock is always on */
	228	{
	229	.name = "I2CCLK",
	230	.ops = &clk_dummy_ops,
	231	.dev = &pxa3xx_device_i2c_power.dev,
	232	},
	233
60bfe7fa MB	234	PXA3xx_CK("LCDCLK", LCD, &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev),
	235	PXA3xx_CK("CAMCLK", CAMERA, &clk_pxa3xx_hsio_ops, NULL),
	236	PXA3xx_CK("AC97CLK", AC97, &clk_pxa3xx_ac97_ops, NULL),
2c8086a5	237
2a0d7187	238	PXA3xx_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
	239	PXA3xx_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
	240	PXA3xx_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
2c8086a5	241
2a0d7187	242	PXA3xx_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
7a857620	243	PXA3xx_CKEN("UDCCLK", UDC, 48000000, 5, &pxa27x_device_udc.dev),
f92a629c	244	PXA3xx_CKEN("USBCLK", USBH, 48000000, 0, &pxa27x_device_ohci.dev),
37320980	245	PXA3xx_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev),
d8e0db11	246
	247	PXA3xx_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
	248	PXA3xx_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
	249	PXA3xx_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
	250	PXA3xx_CKEN("SSPCLK", SSP4, 13000000, 0, &pxa3xx_device_ssp4.dev),
75540c1a	251	PXA3xx_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
75540c1a	252	PXA3xx_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
fafc9d3f BW	253
fafc9d3f BW	254	PXA3xx_CKEN("MMCCLK", MMC1, 19500000, 0, &pxa_device_mci.dev),
8d33b055	255	PXA3xx_CKEN("MMCCLK", MMC2, 19500000, 0, &pxa3xx_device_mci2.dev),
2c8086a5	256	};
2c8086a5	257
7b5dea12	258	#ifdef CONFIG_PM
7b5dea12 RK	259
	260	#define ISRAM_START 0x5c000000
	261	#define ISRAM_SIZE SZ_256K
	262
	263	static void __iomem *sram;
	264	static unsigned long wakeup_src;
	265
c4d1fb62	266	#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
c4d1fb62	267	#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
7b5dea12	268
649de51b	269	enum { SLEEP_SAVE_CKENA,
c4d1fb62	270	SLEEP_SAVE_CKENB,
c4d1fb62	271	SLEEP_SAVE_ACCR,
7b5dea12	272
649de51b	273	SLEEP_SAVE_COUNT,
c4d1fb62	274	};
	275
	276	static void pxa3xx_cpu_pm_save(unsigned long *sleep_save)
	277	{
	278	SAVE(CKENA);
	279	SAVE(CKENB);
	280	SAVE(ACCR);
7b5dea12 RK	281	}
	282
	283	static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save)
	284	{
c4d1fb62	285	RESTORE(ACCR);
	286	RESTORE(CKENA);
	287	RESTORE(CKENB);
7b5dea12 RK	288	}
	289
	290	/*
	291	* Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic
	292	* memory controller has to be reinitialised, so we place some code
	293	* in the SRAM to perform this function.
	294	*
	295	* We disable FIQs across the standby - otherwise, we might receive a
	296	* FIQ while the SDRAM is unavailable.
	297	*/
	298	static void pxa3xx_cpu_standby(unsigned int pwrmode)
	299	{
	300	extern const char pm_enter_standby_start[], pm_enter_standby_end[];
	301	void (fn)(unsigned int) = (void __force )(sram + 0x8000);
	302
	303	memcpy_toio(sram + 0x8000, pm_enter_standby_start,
	304	pm_enter_standby_end - pm_enter_standby_start);
	305
	306	AD2D0SR = ~0;
	307	AD2D1SR = ~0;
	308	AD2D0ER = wakeup_src;
	309	AD2D1ER = 0;
	310	ASCR = ASCR;
	311	ARSR = ARSR;
	312
	313	local_fiq_disable();
	314	fn(pwrmode);
	315	local_fiq_enable();
	316
	317	AD2D0ER = 0;
	318	AD2D1ER = 0;
7b5dea12 RK	319	}
7b5dea12 RK	320
c4d1fb62	321	/*
	322	* NOTE: currently, the OBM (OEM Boot Module) binary comes along with
	323	* PXA3xx development kits assumes that the resuming process continues
	324	* with the address stored within the first 4 bytes of SDRAM. The PSPR
	325	* register is used privately by BootROM and OBM, and _must_ be set to
	326	* 0x5c014000 for the moment.
	327	*/
	328	static void pxa3xx_cpu_pm_suspend(void)
	329	{
	330	volatile unsigned long p = (volatile void )0xc0000000;
	331	unsigned long saved_data = *p;
	332
	333	extern void pxa3xx_cpu_suspend(void);
	334	extern void pxa3xx_cpu_resume(void);
	335
	336	/* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */
	337	CKENA \|= (1 << CKEN_BOOT) \| (1 << CKEN_TPM);
	338	CKENB \|= 1 << (CKEN_HSIO2 & 0x1f);
	339
	340	/* clear and setup wakeup source */
	341	AD3SR = ~0;
	342	AD3ER = wakeup_src;
	343	ASCR = ASCR;
	344	ARSR = ARSR;
	345
	346	PCFR \|= (1u << 13); /* L1_DIS */
	347	PCFR &= ~((1u << 12) \| (1u << 1)); /* L0_EN \| SL_ROD */
	348
	349	PSPR = 0x5c014000;
	350
	351	/* overwrite with the resume address */
	352	*p = virt_to_phys(pxa3xx_cpu_resume);
	353
	354	pxa3xx_cpu_suspend();
	355
	356	*p = saved_data;
	357
	358	AD3ER = 0;
	359	}
	360
7b5dea12 RK	361	static void pxa3xx_cpu_pm_enter(suspend_state_t state)
	362	{
	363	/*
	364	* Don't sleep if no wakeup sources are defined
	365	*/
b86a5da8 MB	366	if (wakeup_src == 0) {
b86a5da8 MB	367	printk(KERN_ERR "Not suspending: no wakeup sources\n");
7b5dea12	368	return;
b86a5da8	369	}
7b5dea12 RK	370
	371	switch (state) {
	372	case PM_SUSPEND_STANDBY:
	373	pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2);
	374	break;
	375
	376	case PM_SUSPEND_MEM:
c4d1fb62	377	pxa3xx_cpu_pm_suspend();
7b5dea12 RK	378	break;
	379	}
	380	}
	381
	382	static int pxa3xx_cpu_pm_valid(suspend_state_t state)
	383	{
	384	return state == PM_SUSPEND_MEM \|\| state == PM_SUSPEND_STANDBY;
	385	}
	386
	387	static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
649de51b	388	.save_count = SLEEP_SAVE_COUNT,
7b5dea12 RK	389	.save = pxa3xx_cpu_pm_save,
	390	.restore = pxa3xx_cpu_pm_restore,
	391	.valid = pxa3xx_cpu_pm_valid,
	392	.enter = pxa3xx_cpu_pm_enter,
2c8086a5	393	};
2c8086a5	394
7b5dea12 RK	395	static void __init pxa3xx_init_pm(void)
	396	{
	397	sram = ioremap(ISRAM_START, ISRAM_SIZE);
	398	if (!sram) {
	399	printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n");
	400	return;
	401	}
	402
	403	/*
	404	* Since we copy wakeup code into the SRAM, we need to ensure
	405	* that it is preserved over the low power modes. Note: bit 8
	406	* is undocumented in the developer manual, but must be set.
	407	*/
	408	AD1R \|= ADXR_L2 \| ADXR_R0;
	409	AD2R \|= ADXR_L2 \| ADXR_R0;
	410	AD3R \|= ADXR_L2 \| ADXR_R0;
	411
	412	/*
	413	* Clear the resume enable registers.
	414	*/
	415	AD1D0ER = 0;
	416	AD2D0ER = 0;
	417	AD2D1ER = 0;
	418	AD3ER = 0;
	419
	420	pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns;
	421	}
	422
	423	static int pxa3xx_set_wake(unsigned int irq, unsigned int on)
	424	{
	425	unsigned long flags, mask = 0;
	426
	427	switch (irq) {
	428	case IRQ_SSP3:
	429	mask = ADXER_MFP_WSSP3;
	430	break;
	431	case IRQ_MSL:
	432	mask = ADXER_WMSL0;
	433	break;
	434	case IRQ_USBH2:
	435	case IRQ_USBH1:
	436	mask = ADXER_WUSBH;
	437	break;
	438	case IRQ_KEYPAD:
	439	mask = ADXER_WKP;
	440	break;
	441	case IRQ_AC97:
	442	mask = ADXER_MFP_WAC97;
	443	break;
	444	case IRQ_USIM:
	445	mask = ADXER_WUSIM0;
	446	break;
	447	case IRQ_SSP2:
	448	mask = ADXER_MFP_WSSP2;
	449	break;
	450	case IRQ_I2C:
	451	mask = ADXER_MFP_WI2C;
	452	break;
	453	case IRQ_STUART:
	454	mask = ADXER_MFP_WUART3;
	455	break;
	456	case IRQ_BTUART:
	457	mask = ADXER_MFP_WUART2;
	458	break;
459	case IRQ_FFUART:
460	mask = ADXER_MFP_WUART1;
461	break;
462	case IRQ_MMC:
463	mask = ADXER_MFP_WMMC1;
464	break;
465	case IRQ_SSP:
466	mask = ADXER_MFP_WSSP1;
467	break;
468	case IRQ_RTCAlrm:
469	mask = ADXER_WRTC;
470	break;
471	case IRQ_SSP4:
472	mask = ADXER_MFP_WSSP4;
473	break;
474	case IRQ_TSI:
475	mask = ADXER_WTSI;
476	break;
477	case IRQ_USIM2:
478	mask = ADXER_WUSIM1;
479	break;
480	case IRQ_MMC2:
481	mask = ADXER_MFP_WMMC2;
482	break;
483	case IRQ_NAND:
484	mask = ADXER_MFP_WFLASH;
485	break;
486	case IRQ_USB2:
487	mask = ADXER_WUSB2;
488	break;
489	case IRQ_WAKEUP0:
490	mask = ADXER_WEXTWAKE0;
491	break;
492	case IRQ_WAKEUP1:
493	mask = ADXER_WEXTWAKE1;
494	break;
495	case IRQ_MMC3:
496	mask = ADXER_MFP_GEN12;
497	break;
e1217707 MB	498	default:
e1217707 MB	499	return -EINVAL;
7b5dea12 RK	500	}
	501
	502	local_irq_save(flags);
	503	if (on)
	504	wakeup_src \|= mask;
	505	else
	506	wakeup_src &= ~mask;
	507	local_irq_restore(flags);
	508
	509	return 0;
	510	}
7b5dea12 RK	511	#else
7b5dea12 RK	512	static inline void pxa3xx_init_pm(void) {}
b9e25ace	513	#define pxa3xx_set_wake NULL
7b5dea12 RK	514	#endif
7b5dea12 RK	515
2c8086a5	516	void __init pxa3xx_init_irq(void)
	517	{
	518	/* enable CP6 access */
	519	u32 value;
	520	__asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value));
	521	value \|= (1 << 6);
	522	__asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));
	523
b9e25ace	524	pxa_init_irq(56, pxa3xx_set_wake);
b9e25ace	525	pxa_init_gpio(128, NULL);
2c8086a5	526	}
	527
	528	/*
	529	* device registration specific to PXA3xx.
	530	*/
	531
9ba63c4f MR	532	void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info)
	533	{
	534	pxa3xx_device_i2c_power.dev.platform_data = info;
	535	}
	536
2c8086a5	537	static struct platform_device *devices[] __initdata = {
284d115e	538	/* &pxa_device_udc, The UDC driver is PXA25x only */
2c8086a5	539	&pxa_device_ffuart,
	540	&pxa_device_btuart,
	541	&pxa_device_stuart,
2c8086a5	542	&pxa_device_i2s,
2c8086a5	543	&pxa_device_rtc,
d8e0db11	544	&pxa27x_device_ssp1,
	545	&pxa27x_device_ssp2,
	546	&pxa27x_device_ssp3,
	547	&pxa3xx_device_ssp4,
75540c1a	548	&pxa27x_device_pwm0,
75540c1a	549	&pxa27x_device_pwm1,
9ba63c4f	550	&pxa3xx_device_i2c_power,
2c8086a5	551	};
2c8086a5	552
c0165504	553	static struct sys_device pxa3xx_sysdev[] = {
c0165504	554	{
c0165504	555	.cls = &pxa_irq_sysclass,
4be35e23	556	}, {
4be35e23	557	.cls = &pxa3xx_mfp_sysclass,
16dfdbf0	558	}, {
16dfdbf0	559	.cls = &pxa_gpio_sysclass,
c0165504	560	},
	561	};
	562
2c8086a5	563	static int __init pxa3xx_init(void)
2c8086a5	564	{
c0165504	565	int i, ret = 0;
2c8086a5	566
2c8086a5	567	if (cpu_is_pxa3xx()) {
04fef228 EM	568
	569	reset_status = ARSR;
	570
86260f98 DK	571	/*
	572	* clear RDH bit every time after reset
	573	*
	574	* Note: the last 3 bits DxS are write-1-to-clear so carefully
	575	* preserve them here in case they will be referenced later
	576	*/
	577	ASCR &= ~(ASCR_RDH \| ASCR_D1S \| ASCR_D2S \| ASCR_D3S);
	578
2c8086a5	579	clks_register(pxa3xx_clks, ARRAY_SIZE(pxa3xx_clks));
	580
	581	if ((ret = pxa_init_dma(32)))
	582	return ret;
	583
7b5dea12 RK	584	pxa3xx_init_pm();
7b5dea12 RK	585
c0165504	586	for (i = 0; i < ARRAY_SIZE(pxa3xx_sysdev); i++) {
	587	ret = sysdev_register(&pxa3xx_sysdev[i]);
	588	if (ret)
	589	pr_err("failed to register sysdev[%d]\n", i);
	590	}
	591
	592	ret = platform_add_devices(devices, ARRAY_SIZE(devices));
2c8086a5	593	}
c0165504	594
c0165504	595	return ret;
2c8086a5	596	}
2c8086a5	597
1c104e0e	598	postcore_initcall(pxa3xx_init);