diff options
Diffstat (limited to 'arch/arm/mach-pxa/pxa25x.c')
| -rw-r--r-- | arch/arm/mach-pxa/pxa25x.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c new file mode 100644 index 0000000000..02712d24be --- /dev/null +++ b/arch/arm/mach-pxa/pxa25x.c @@ -0,0 +1,256 @@ +// 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); |