arch/arm/mach-pxa/pxa25x.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/arch/arm/mach-pxa/pxa25x.c
   4  *
   5  *  Author:     Nicolas Pitre
   6  *  Created:    Jun 15, 2001
   7  *  Copyright:  MontaVista Software Inc.
   8  *
   9  * Code specific to PXA21x/25x/26x variants.
  10  *
  11  * Since this file should be linked before any other machine specific file,
  12  * the __initcall() here will be executed first.  This serves as default
  13  * initialization stuff for PXA machines which can be overridden later if
  14  * need be.
  15  */
  16 #include <linux/dmaengine.h>
  17 #include <linux/dma/pxa-dma.h>
  18 #include <linux/gpio.h>
  19 #include <linux/gpio-pxa.h>
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/suspend.h>
  25 #include <linux/syscore_ops.h>
  26 #include <linux/irq.h>
  27 #include <linux/irqchip.h>
  28 #include <linux/platform_data/mmp_dma.h>
  29 #include <linux/soc/pxa/cpu.h>
  30 #include <linux/soc/pxa/smemc.h>
  31
  32 #include <asm/mach/map.h>
  33 #include <asm/suspend.h>
  34 #include "irqs.h"
  35 #include "pxa25x.h"
  36 #include "reset.h"
  37 #include "pm.h"
  38 #include "addr-map.h"
  39 #include "smemc.h"
  40
  41 #include "generic.h"
  42 #include "devices.h"
  43
  44 /*
  45  * Various clock factors driven by the CCCR register.
  46  */
  47
  48 #ifdef CONFIG_PM
  49
  50 #define SAVE(x)         sleep_save[SLEEP_SAVE_##x] = x
  51 #define RESTORE(x)      x = sleep_save[SLEEP_SAVE_##x]
  52
  53 /*
  54  * List of global PXA peripheral registers to preserve.
  55  * More ones like CP and general purpose register values are preserved
  56  * with the stack pointer in sleep.S.
  57  */
  58 enum {
  59         SLEEP_SAVE_PSTR,
  60         SLEEP_SAVE_COUNT
  61 };
  62
  63
  64 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
  65 {
  66         SAVE(PSTR);
  67 }
  68
  69 static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
  70 {
  71         RESTORE(PSTR);
  72 }
  73
  74 static void pxa25x_cpu_pm_enter(suspend_state_t state)
  75 {
  76         /* Clear reset status */
  77         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
  78
  79         switch (state) {
  80         case PM_SUSPEND_MEM:
  81                 cpu_suspend(PWRMODE_SLEEP, pxa25x_finish_suspend);
  82                 break;
  83         }
  84 }
  85
  86 static int pxa25x_cpu_pm_prepare(void)
  87 {
  88         /* set resume return address */
  89         PSPR = __pa_symbol(cpu_resume);
  90         return 0;
  91 }
  92
  93 static void pxa25x_cpu_pm_finish(void)
  94 {
  95         /* ensure not to come back here if it wasn't intended */
  96         PSPR = 0;
  97 }
  98
  99 static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
 100         .save_count     = SLEEP_SAVE_COUNT,
 101         .valid          = suspend_valid_only_mem,
 102         .save           = pxa25x_cpu_pm_save,
 103         .restore        = pxa25x_cpu_pm_restore,
 104         .enter          = pxa25x_cpu_pm_enter,
 105         .prepare        = pxa25x_cpu_pm_prepare,
 106         .finish         = pxa25x_cpu_pm_finish,
 107 };
 108
 109 static void __init pxa25x_init_pm(void)
 110 {
 111         pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
 112 }
 113 #else
 114 static inline void pxa25x_init_pm(void) {}
 115 #endif
 116
 117 /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
 118  */
 119
 120 static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
 121 {
 122         int gpio = pxa_irq_to_gpio(d->irq);
 123         uint32_t mask = 0;
 124
 125         if (gpio >= 0 && gpio < 85)
 126                 return gpio_set_wake(gpio, on);
 127
 128         if (d->irq == IRQ_RTCAlrm) {
 129                 mask = PWER_RTC;
 130                 goto set_pwer;
 131         }
 132
 133         return -EINVAL;
 134
 135 set_pwer:
 136         if (on)
 137                 PWER |= mask;
 138         else
 139                 PWER &=~mask;
 140
 141         return 0;
 142 }
 143
 144 void __init pxa25x_init_irq(void)
 145 {
 146         pxa_init_irq(32, pxa25x_set_wake);
 147         set_handle_irq(pxa25x_handle_irq);
 148 }
 149
 150 static int __init __init
 151 pxa25x_dt_init_irq(struct device_node *node, struct device_node *parent)
 152 {
 153         pxa_dt_irq_init(pxa25x_set_wake);
 154         set_handle_irq(icip_handle_irq);
 155
 156         return 0;
 157 }
 158 IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq);
 159
 160 static struct map_desc pxa25x_io_desc[] __initdata = {
 161         {       /* Mem Ctl */
 162                 .virtual        = (unsigned long)SMEMC_VIRT,
 163                 .pfn            = __phys_to_pfn(PXA2XX_SMEMC_BASE),
 164                 .length         = SMEMC_SIZE,
 165                 .type           = MT_DEVICE
 166         }, {    /* UNCACHED_PHYS_0 */
 167                 .virtual        = UNCACHED_PHYS_0,
 168                 .pfn            = __phys_to_pfn(0x00000000),
 169                 .length         = UNCACHED_PHYS_0_SIZE,
 170                 .type           = MT_DEVICE
 171         },
 172 };
 173
 174 void __init pxa25x_map_io(void)
 175 {
 176         pxa_map_io();
 177         iotable_init(ARRAY_AND_SIZE(pxa25x_io_desc));
 178         pxa25x_get_clk_frequency_khz(1);
 179 }
 180
 181 static struct platform_device *pxa25x_devices[] __initdata = {
 182         &pxa25x_device_gpio,
 183         &pxa25x_device_udc,
 184         &pxa_device_pmu,
 185         &pxa_device_i2s,
 186         &sa1100_device_rtc,
 187         &pxa25x_device_ssp,
 188         &pxa25x_device_nssp,
 189         &pxa25x_device_assp,
 190         &pxa25x_device_pwm0,
 191         &pxa25x_device_pwm1,
 192         &pxa_device_asoc_platform,
 193 };
 194
 195 static const struct dma_slave_map pxa25x_slave_map[] = {
 196         /* PXA25x, PXA27x and PXA3xx common entries */
 197         { "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
 198         { "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
 199         { "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
 200           PDMA_FILTER_PARAM(LOWEST, 10) },
 201         { "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
 202         { "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
 203         { "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 204         { "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 205         { "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 206         { "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 207         { "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
 208         { "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
 209         { "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
 210         { "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },
 211
 212         /* PXA25x specific map */
 213         { "pxa25x-ssp.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 214         { "pxa25x-ssp.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 215         { "pxa25x-nssp.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 216         { "pxa25x-nssp.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 217         { "pxa25x-nssp.2", "rx", PDMA_FILTER_PARAM(LOWEST, 23) },
 218         { "pxa25x-nssp.2", "tx", PDMA_FILTER_PARAM(LOWEST, 24) },
 219 };
 220
 221 static struct mmp_dma_platdata pxa25x_dma_pdata = {
 222         .dma_channels   = 16,
 223         .nb_requestors  = 40,
 224         .slave_map      = pxa25x_slave_map,
 225         .slave_map_cnt  = ARRAY_SIZE(pxa25x_slave_map),
 226 };
 227
 228 static int __init pxa25x_init(void)
 229 {
 230         int ret = 0;
 231
 232         if (cpu_is_pxa25x()) {
 233
 234                 pxa_register_wdt(RCSR);
 235
 236                 pxa25x_init_pm();
 237
 238                 register_syscore_ops(&pxa_irq_syscore_ops);
 239                 register_syscore_ops(&pxa2xx_mfp_syscore_ops);
 240
 241                 if (!of_have_populated_dt()) {
 242                         software_node_register(&pxa2xx_gpiochip_node);
 243                         pxa2xx_set_dmac_info(&pxa25x_dma_pdata);
 244                         ret = platform_add_devices(pxa25x_devices,
 245                                                    ARRAY_SIZE(pxa25x_devices));
 246                 }
 247         }
 248
 249         return ret;
 250 }
 251
 252 postcore_initcall(pxa25x_init);