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261 lines
6.2 KiB
261 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/arch/arm/mach-pxa/pxa25x.c |
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* |
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* Author: Nicolas Pitre |
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* Created: Jun 15, 2001 |
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* Copyright: MontaVista Software Inc. |
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* |
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* Code specific to PXA21x/25x/26x variants. |
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* |
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* Since this file should be linked before any other machine specific file, |
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* the __initcall() here will be executed first. This serves as default |
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* initialization stuff for PXA machines which can be overridden later if |
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* need be. |
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*/ |
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#include <linux/dmaengine.h> |
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#include <linux/dma/pxa-dma.h> |
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#include <linux/gpio.h> |
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#include <linux/gpio-pxa.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/platform_device.h> |
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#include <linux/suspend.h> |
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#include <linux/syscore_ops.h> |
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#include <linux/irq.h> |
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#include <linux/irqchip.h> |
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#include <linux/platform_data/mmp_dma.h> |
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#include <asm/mach/map.h> |
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#include <asm/suspend.h> |
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#include <mach/hardware.h> |
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#include <mach/irqs.h> |
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#include "pxa25x.h" |
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#include <mach/reset.h> |
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#include "pm.h" |
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#include <mach/dma.h> |
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#include <mach/smemc.h> |
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#include "generic.h" |
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#include "devices.h" |
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/* |
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* Various clock factors driven by the CCCR register. |
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*/ |
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#ifdef CONFIG_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_PSTR, |
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SLEEP_SAVE_COUNT |
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}; |
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static void pxa25x_cpu_pm_save(unsigned long *sleep_save) |
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{ |
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SAVE(PSTR); |
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} |
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static void pxa25x_cpu_pm_restore(unsigned long *sleep_save) |
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{ |
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RESTORE(PSTR); |
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} |
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static void pxa25x_cpu_pm_enter(suspend_state_t state) |
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{ |
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/* Clear reset status */ |
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RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR; |
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switch (state) { |
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case PM_SUSPEND_MEM: |
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cpu_suspend(PWRMODE_SLEEP, pxa25x_finish_suspend); |
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break; |
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} |
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} |
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static int pxa25x_cpu_pm_prepare(void) |
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{ |
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/* set resume return address */ |
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PSPR = __pa_symbol(cpu_resume); |
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return 0; |
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} |
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static void pxa25x_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 pxa_cpu_pm_fns pxa25x_cpu_pm_fns = { |
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.save_count = SLEEP_SAVE_COUNT, |
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.valid = suspend_valid_only_mem, |
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.save = pxa25x_cpu_pm_save, |
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.restore = pxa25x_cpu_pm_restore, |
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.enter = pxa25x_cpu_pm_enter, |
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.prepare = pxa25x_cpu_pm_prepare, |
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.finish = pxa25x_cpu_pm_finish, |
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}; |
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static void __init pxa25x_init_pm(void) |
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{ |
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pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns; |
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} |
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#else |
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static inline void pxa25x_init_pm(void) {} |
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#endif |
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/* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm |
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*/ |
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static int pxa25x_set_wake(struct irq_data *d, unsigned int on) |
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{ |
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int gpio = pxa_irq_to_gpio(d->irq); |
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uint32_t mask = 0; |
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if (gpio >= 0 && gpio < 85) |
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return gpio_set_wake(gpio, on); |
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if (d->irq == IRQ_RTCAlrm) { |
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mask = PWER_RTC; |
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goto set_pwer; |
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} |
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return -EINVAL; |
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set_pwer: |
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if (on) |
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PWER |= mask; |
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else |
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PWER &=~mask; |
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return 0; |
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} |
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void __init pxa25x_init_irq(void) |
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{ |
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pxa_init_irq(32, pxa25x_set_wake); |
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} |
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#ifdef CONFIG_CPU_PXA26x |
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void __init pxa26x_init_irq(void) |
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{ |
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pxa_init_irq(32, pxa25x_set_wake); |
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} |
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#endif |
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static int __init __init |
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pxa25x_dt_init_irq(struct device_node *node, struct device_node *parent) |
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{ |
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pxa_dt_irq_init(pxa25x_set_wake); |
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set_handle_irq(icip_handle_irq); |
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return 0; |
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} |
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IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq); |
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static struct map_desc pxa25x_io_desc[] __initdata = { |
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{ /* Mem Ctl */ |
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.virtual = (unsigned long)SMEMC_VIRT, |
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.pfn = __phys_to_pfn(PXA2XX_SMEMC_BASE), |
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.length = SMEMC_SIZE, |
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.type = MT_DEVICE |
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}, { /* UNCACHED_PHYS_0 */ |
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.virtual = UNCACHED_PHYS_0, |
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.pfn = __phys_to_pfn(0x00000000), |
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.length = UNCACHED_PHYS_0_SIZE, |
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.type = MT_DEVICE |
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}, |
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}; |
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void __init pxa25x_map_io(void) |
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{ |
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pxa_map_io(); |
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iotable_init(ARRAY_AND_SIZE(pxa25x_io_desc)); |
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pxa25x_get_clk_frequency_khz(1); |
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} |
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static struct pxa_gpio_platform_data pxa25x_gpio_info __initdata = { |
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.irq_base = PXA_GPIO_TO_IRQ(0), |
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.gpio_set_wake = gpio_set_wake, |
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}; |
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static struct platform_device *pxa25x_devices[] __initdata = { |
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&pxa25x_device_udc, |
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&pxa_device_pmu, |
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&pxa_device_i2s, |
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&sa1100_device_rtc, |
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&pxa25x_device_ssp, |
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&pxa25x_device_nssp, |
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&pxa25x_device_assp, |
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&pxa25x_device_pwm0, |
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&pxa25x_device_pwm1, |
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&pxa_device_asoc_platform, |
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}; |
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static const struct dma_slave_map pxa25x_slave_map[] = { |
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/* PXA25x, PXA27x and PXA3xx common entries */ |
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{ "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) }, |
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{ "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) }, |
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{ "pxa2xx-ac97", "pcm_pcm_aux_mono_out", |
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PDMA_FILTER_PARAM(LOWEST, 10) }, |
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{ "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) }, |
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{ "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) }, |
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{ "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 13) }, |
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{ "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 14) }, |
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{ "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 15) }, |
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{ "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 16) }, |
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{ "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) }, |
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{ "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) }, |
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{ "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) }, |
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{ "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) }, |
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/* PXA25x specific map */ |
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{ "pxa25x-ssp.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) }, |
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{ "pxa25x-ssp.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) }, |
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{ "pxa25x-nssp.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) }, |
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{ "pxa25x-nssp.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) }, |
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{ "pxa25x-nssp.2", "rx", PDMA_FILTER_PARAM(LOWEST, 23) }, |
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{ "pxa25x-nssp.2", "tx", PDMA_FILTER_PARAM(LOWEST, 24) }, |
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}; |
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static struct mmp_dma_platdata pxa25x_dma_pdata = { |
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.dma_channels = 16, |
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.nb_requestors = 40, |
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.slave_map = pxa25x_slave_map, |
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.slave_map_cnt = ARRAY_SIZE(pxa25x_slave_map), |
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}; |
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static int __init pxa25x_init(void) |
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{ |
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int ret = 0; |
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if (cpu_is_pxa25x()) { |
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reset_status = RCSR; |
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pxa25x_init_pm(); |
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register_syscore_ops(&pxa_irq_syscore_ops); |
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register_syscore_ops(&pxa2xx_mfp_syscore_ops); |
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if (!of_have_populated_dt()) { |
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pxa2xx_set_dmac_info(&pxa25x_dma_pdata); |
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pxa_register_device(&pxa25x_device_gpio, &pxa25x_gpio_info); |
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ret = platform_add_devices(pxa25x_devices, |
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ARRAY_SIZE(pxa25x_devices)); |
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} |
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} |
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return ret; |
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} |
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postcore_initcall(pxa25x_init);
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