arch/arm/mach-pxa/pxa25x.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/arch/arm/mach-pxa/pxa25x.c
  *
  *  Author:	Nicolas Pitre
  *  Created:	Jun 15, 2001
  *  Copyright:	MontaVista Software Inc.
  *
  * Code specific to PXA21x/25x/26x variants.
  *
  * Since this file should be linked before any other machine specific file,
  * the __initcall() here will be executed first.  This serves as default
  * initialization stuff for PXA machines which can be overridden later if
  * need be.
  */
 #include <linux/dmaengine.h>
 #include <linux/dma/pxa-dma.h>
 #include <linux/gpio.h>
 #include <linux/gpio-pxa.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/suspend.h>
 #include <linux/syscore_ops.h>
 #include <linux/irq.h>
 #include <linux/irqchip.h>
 #include <linux/platform_data/mmp_dma.h>
 #include <linux/soc/pxa/cpu.h>
 #include <linux/soc/pxa/smemc.h>

 #include <asm/mach/map.h>
 #include <asm/suspend.h>
 #include "irqs.h"
 #include "pxa25x.h"
 #include "reset.h"
 #include "pm.h"
 #include "addr-map.h"
 #include "smemc.h"

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

 /*
  * Various clock factors driven by the CCCR register.
  */

 #ifdef CONFIG_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_PSTR,
 	SLEEP_SAVE_COUNT
 };


 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
 {
 	SAVE(PSTR);
 }

 static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
 {
 	RESTORE(PSTR);
 }

 static void pxa25x_cpu_pm_enter(suspend_state_t state)
 {
 	/* Clear reset status */
 	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;

 	switch (state) {
 	case PM_SUSPEND_MEM:
 		cpu_suspend(PWRMODE_SLEEP, pxa25x_finish_suspend);
 		break;
 	}
 }

 static int pxa25x_cpu_pm_prepare(void)
 {
 	/* set resume return address */
 	PSPR = __pa_symbol(cpu_resume);
 	return 0;
 }

 static void pxa25x_cpu_pm_finish(void)
 {
 	/* ensure not to come back here if it wasn't intended */
 	PSPR = 0;
 }

 static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
 	.save_count	= SLEEP_SAVE_COUNT,
 	.valid		= suspend_valid_only_mem,
 	.save		= pxa25x_cpu_pm_save,
 	.restore	= pxa25x_cpu_pm_restore,
 	.enter		= pxa25x_cpu_pm_enter,
 	.prepare	= pxa25x_cpu_pm_prepare,
 	.finish		= pxa25x_cpu_pm_finish,
 };

 static void __init pxa25x_init_pm(void)
 {
 	pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
 }
 #else
 static inline void pxa25x_init_pm(void) {}
 #endif

 /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
  */

 static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
 {
 	int gpio = pxa_irq_to_gpio(d->irq);
 	uint32_t mask = 0;

 	if (gpio >= 0 && gpio < 85)
 		return gpio_set_wake(gpio, on);

 	if (d->irq == IRQ_RTCAlrm) {
 		mask = PWER_RTC;
 		goto set_pwer;
 	}

 	return -EINVAL;

 set_pwer:
 	if (on)
 		PWER |= mask;
 	else
 		PWER &=~mask;

 	return 0;
 }

 void __init pxa25x_init_irq(void)
 {
 	pxa_init_irq(32, pxa25x_set_wake);
 	set_handle_irq(pxa25x_handle_irq);
 }

 static int __init __init
 pxa25x_dt_init_irq(struct device_node *node, struct device_node *parent)
 {
 	pxa_dt_irq_init(pxa25x_set_wake);
 	set_handle_irq(icip_handle_irq);

 	return 0;
 }
 IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq);

 static struct map_desc pxa25x_io_desc[] __initdata = {
 	{	/* Mem Ctl */
 		.virtual	= (unsigned long)SMEMC_VIRT,
 		.pfn		= __phys_to_pfn(PXA2XX_SMEMC_BASE),
 		.length		= SMEMC_SIZE,
 		.type		= MT_DEVICE
 	}, {	/* UNCACHED_PHYS_0 */
 		.virtual	= UNCACHED_PHYS_0,
 		.pfn		= __phys_to_pfn(0x00000000),
 		.length		= UNCACHED_PHYS_0_SIZE,
 		.type		= MT_DEVICE
 	},
 };

 void __init pxa25x_map_io(void)
 {
 	pxa_map_io();
 	iotable_init(ARRAY_AND_SIZE(pxa25x_io_desc));
 	pxa25x_get_clk_frequency_khz(1);
 }

 static struct pxa_gpio_platform_data pxa25x_gpio_info __initdata = {
 	.irq_base	= PXA_GPIO_TO_IRQ(0),
 	.gpio_set_wake	= gpio_set_wake,
 };

 static struct platform_device *pxa25x_devices[] __initdata = {
 	&pxa25x_device_udc,
 	&pxa_device_pmu,
 	&pxa_device_i2s,
 	&sa1100_device_rtc,
 	&pxa25x_device_ssp,
 	&pxa25x_device_nssp,
 	&pxa25x_device_assp,
 	&pxa25x_device_pwm0,
 	&pxa25x_device_pwm1,
 	&pxa_device_asoc_platform,
 };

 static const struct dma_slave_map pxa25x_slave_map[] = {
 	/* PXA25x, PXA27x and PXA3xx common entries */
 	{ "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
 	{ "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
 	{ "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
 	  PDMA_FILTER_PARAM(LOWEST, 10) },
 	{ "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
 	{ "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
 	{ "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 	{ "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 	{ "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 	{ "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 	{ "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
 	{ "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
 	{ "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
 	{ "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },

 	/* PXA25x specific map */
 	{ "pxa25x-ssp.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 	{ "pxa25x-ssp.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 	{ "pxa25x-nssp.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 	{ "pxa25x-nssp.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 	{ "pxa25x-nssp.2", "rx", PDMA_FILTER_PARAM(LOWEST, 23) },
 	{ "pxa25x-nssp.2", "tx", PDMA_FILTER_PARAM(LOWEST, 24) },
 };

 static struct mmp_dma_platdata pxa25x_dma_pdata = {
 	.dma_channels	= 16,
 	.nb_requestors	= 40,
 	.slave_map	= pxa25x_slave_map,
 	.slave_map_cnt	= ARRAY_SIZE(pxa25x_slave_map),
 };

 static int __init pxa25x_init(void)
 {
 	int ret = 0;

 	if (cpu_is_pxa25x()) {

 		pxa_register_wdt(RCSR);

 		pxa25x_init_pm();

 		register_syscore_ops(&pxa_irq_syscore_ops);
 		register_syscore_ops(&pxa2xx_mfp_syscore_ops);

 		if (!of_have_populated_dt()) {
 			pxa2xx_set_dmac_info(&pxa25x_dma_pdata);
 			pxa_register_device(&pxa25x_device_gpio, &pxa25x_gpio_info);
 			ret = platform_add_devices(pxa25x_devices,
 						   ARRAY_SIZE(pxa25x_devices));
 		}
 	}

 	return ret;
 }

 postcore_initcall(pxa25x_init);
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* linux/arch/arm/mach-pxa/pxa25x.c
	*
	* Author: Nicolas Pitre
	* Created: Jun 15, 2001
	* Copyright: MontaVista Software Inc.
	*
	* Code specific to PXA21x/25x/26x variants.
	*
	* Since this file should be linked before any other machine specific file,
	* the __initcall() here will be executed first. This serves as default
	* initialization stuff for PXA machines which can be overridden later if
	* need be.
	*/
	#include <linux/dmaengine.h>
	#include <linux/dma/pxa-dma.h>
	#include <linux/gpio.h>
	#include <linux/gpio-pxa.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/platform_device.h>
	#include <linux/suspend.h>
	#include <linux/syscore_ops.h>
	#include <linux/irq.h>
	#include <linux/irqchip.h>
	#include <linux/platform_data/mmp_dma.h>
	#include <linux/soc/pxa/cpu.h>
	#include <linux/soc/pxa/smemc.h>

	#include <asm/mach/map.h>
	#include <asm/suspend.h>
	#include "irqs.h"
	#include "pxa25x.h"
	#include "reset.h"
	#include "pm.h"
	#include "addr-map.h"
	#include "smemc.h"

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

	/*
	* Various clock factors driven by the CCCR register.
	*/

	#ifdef CONFIG_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_PSTR,
	SLEEP_SAVE_COUNT
	};


	static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
	{
	SAVE(PSTR);
	}

	static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
	{
	RESTORE(PSTR);
	}

	static void pxa25x_cpu_pm_enter(suspend_state_t state)
	{
	/* Clear reset status */
	RCSR = RCSR_HWR \| RCSR_WDR \| RCSR_SMR \| RCSR_GPR;

	switch (state) {
	case PM_SUSPEND_MEM:
	cpu_suspend(PWRMODE_SLEEP, pxa25x_finish_suspend);
	break;
	}
	}

	static int pxa25x_cpu_pm_prepare(void)
	{
	/* set resume return address */
	PSPR = __pa_symbol(cpu_resume);
	return 0;
	}

	static void pxa25x_cpu_pm_finish(void)
	{
	/* ensure not to come back here if it wasn't intended */
	PSPR = 0;
	}

	static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
	.save_count = SLEEP_SAVE_COUNT,
	.valid = suspend_valid_only_mem,
	.save = pxa25x_cpu_pm_save,
	.restore = pxa25x_cpu_pm_restore,
	.enter = pxa25x_cpu_pm_enter,
	.prepare = pxa25x_cpu_pm_prepare,
	.finish = pxa25x_cpu_pm_finish,
	};

	static void __init pxa25x_init_pm(void)
	{
	pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
	}
	#else
	static inline void pxa25x_init_pm(void) {}
	#endif

	/* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
	*/

	static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
	{
	int gpio = pxa_irq_to_gpio(d->irq);
	uint32_t mask = 0;

	if (gpio >= 0 && gpio < 85)
	return gpio_set_wake(gpio, on);

	if (d->irq == IRQ_RTCAlrm) {
	mask = PWER_RTC;
	goto set_pwer;
	}

	return -EINVAL;

	set_pwer:
	if (on)
	PWER \|= mask;
	else
	PWER &=~mask;

	return 0;
	}

	void __init pxa25x_init_irq(void)
	{
	pxa_init_irq(32, pxa25x_set_wake);
	set_handle_irq(pxa25x_handle_irq);
	}

	static int __init __init
	pxa25x_dt_init_irq(struct device_node node, struct device_node parent)
	{
	pxa_dt_irq_init(pxa25x_set_wake);
	set_handle_irq(icip_handle_irq);

	return 0;
	}
	IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq);

	static struct map_desc pxa25x_io_desc[] __initdata = {
	{ /* Mem Ctl */
	.virtual = (unsigned long)SMEMC_VIRT,
	.pfn = __phys_to_pfn(PXA2XX_SMEMC_BASE),
	.length = SMEMC_SIZE,
	.type = MT_DEVICE
	}, { /* UNCACHED_PHYS_0 */
	.virtual = UNCACHED_PHYS_0,
	.pfn = __phys_to_pfn(0x00000000),
	.length = UNCACHED_PHYS_0_SIZE,
	.type = MT_DEVICE
	},
	};

	void __init pxa25x_map_io(void)
	{
	pxa_map_io();
	iotable_init(ARRAY_AND_SIZE(pxa25x_io_desc));
	pxa25x_get_clk_frequency_khz(1);
	}

	static struct pxa_gpio_platform_data pxa25x_gpio_info __initdata = {
	.irq_base = PXA_GPIO_TO_IRQ(0),
	.gpio_set_wake = gpio_set_wake,
	};

	static struct platform_device *pxa25x_devices[] __initdata = {
	&pxa25x_device_udc,
	&pxa_device_pmu,
	&pxa_device_i2s,
	&sa1100_device_rtc,
	&pxa25x_device_ssp,
	&pxa25x_device_nssp,
	&pxa25x_device_assp,
	&pxa25x_device_pwm0,
	&pxa25x_device_pwm1,
	&pxa_device_asoc_platform,
	};

	static const struct dma_slave_map pxa25x_slave_map[] = {
	/* PXA25x, PXA27x and PXA3xx common entries */
	{ "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
	{ "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
	{ "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
	PDMA_FILTER_PARAM(LOWEST, 10) },
	{ "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
	{ "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
	{ "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
	{ "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
	{ "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
	{ "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
	{ "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
	{ "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
	{ "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
	{ "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },

	/* PXA25x specific map */
	{ "pxa25x-ssp.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
	{ "pxa25x-ssp.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
	{ "pxa25x-nssp.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
	{ "pxa25x-nssp.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
	{ "pxa25x-nssp.2", "rx", PDMA_FILTER_PARAM(LOWEST, 23) },
	{ "pxa25x-nssp.2", "tx", PDMA_FILTER_PARAM(LOWEST, 24) },
	};

	static struct mmp_dma_platdata pxa25x_dma_pdata = {
	.dma_channels = 16,
	.nb_requestors = 40,
	.slave_map = pxa25x_slave_map,
	.slave_map_cnt = ARRAY_SIZE(pxa25x_slave_map),
	};

	static int __init pxa25x_init(void)
	{
	int ret = 0;

	if (cpu_is_pxa25x()) {

	pxa_register_wdt(RCSR);

	pxa25x_init_pm();

	register_syscore_ops(&pxa_irq_syscore_ops);
	register_syscore_ops(&pxa2xx_mfp_syscore_ops);

	if (!of_have_populated_dt()) {
	pxa2xx_set_dmac_info(&pxa25x_dma_pdata);
	pxa_register_device(&pxa25x_device_gpio, &pxa25x_gpio_info);
	ret = platform_add_devices(pxa25x_devices,
	ARRAY_SIZE(pxa25x_devices));
	}
	}

	return ret;
	}

	postcore_initcall(pxa25x_init);