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
  31 #include <asm/mach/map.h>
  32 #include <asm/suspend.h>
  33 #include "irqs.h"
  34 #include "pxa25x.h"
  35 #include "reset.h"
  36 #include "pm.h"
  37 #include "addr-map.h"
  38 #include "smemc.h"
  39
  40 #include "generic.h"
  41 #include "devices.h"
  42
  43 /*
  44  * Various clock factors driven by the CCCR register.
  45  */
  46
  47 #ifdef CONFIG_PM
  48
  49 #define SAVE(x)         sleep_save[SLEEP_SAVE_##x] = x
  50 #define RESTORE(x)      x = sleep_save[SLEEP_SAVE_##x]
  51
  52 /*
  53  * List of global PXA peripheral registers to preserve.
  54  * More ones like CP and general purpose register values are preserved
  55  * with the stack pointer in sleep.S.
  56  */
  57 enum {
  58         SLEEP_SAVE_PSTR,
  59         SLEEP_SAVE_COUNT
  60 };
  61
  62
  63 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
  64 {
  65         SAVE(PSTR);
  66 }
  67
  68 static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
  69 {
  70         RESTORE(PSTR);
  71 }
  72
  73 static void pxa25x_cpu_pm_enter(suspend_state_t state)
  74 {
  75         /* Clear reset status */
  76         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
  77
  78         switch (state) {
  79         case PM_SUSPEND_MEM:
  80                 cpu_suspend(PWRMODE_SLEEP, pxa25x_finish_suspend);
  81                 break;
  82         }
  83 }
  84
  85 static int pxa25x_cpu_pm_prepare(void)
  86 {
  87         /* set resume return address */
  88         PSPR = __pa_symbol(cpu_resume);
  89         return 0;
  90 }
  91
  92 static void pxa25x_cpu_pm_finish(void)
  93 {
  94         /* ensure not to come back here if it wasn't intended */
  95         PSPR = 0;
  96 }
  97
  98 static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
  99         .save_count     = SLEEP_SAVE_COUNT,
 100         .valid          = suspend_valid_only_mem,
 101         .save           = pxa25x_cpu_pm_save,
 102         .restore        = pxa25x_cpu_pm_restore,
 103         .enter          = pxa25x_cpu_pm_enter,
 104         .prepare        = pxa25x_cpu_pm_prepare,
 105         .finish         = pxa25x_cpu_pm_finish,
 106 };
 107
 108 static void __init pxa25x_init_pm(void)
 109 {
 110         pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
 111 }
 112 #else
 113 static inline void pxa25x_init_pm(void) {}
 114 #endif
 115
 116 /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
 117  */
 118
 119 static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
 120 {
 121         int gpio = pxa_irq_to_gpio(d->irq);
 122         uint32_t mask = 0;
 123
 124         if (gpio >= 0 && gpio < 85)
 125                 return gpio_set_wake(gpio, on);
 126
 127         if (d->irq == IRQ_RTCAlrm) {
 128                 mask = PWER_RTC;
 129                 goto set_pwer;
 130         }
 131
 132         return -EINVAL;
 133
 134 set_pwer:
 135         if (on)
 136                 PWER |= mask;
 137         else
 138                 PWER &=~mask;
 139
 140         return 0;
 141 }
 142
 143 void __init pxa25x_init_irq(void)
 144 {
 145         pxa_init_irq(32, pxa25x_set_wake);
 146         set_handle_irq(pxa25x_handle_irq);
 147 }
 148
 149 static int __init __init
 150 pxa25x_dt_init_irq(struct device_node *node, struct device_node *parent)
 151 {
 152         pxa_dt_irq_init(pxa25x_set_wake);
 153         set_handle_irq(icip_handle_irq);
 154
 155         return 0;
 156 }
 157 IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq);
 158
 159 static struct map_desc pxa25x_io_desc[] __initdata = {
 160         {       /* Mem Ctl */
 161                 .virtual        = (unsigned long)SMEMC_VIRT,
 162                 .pfn            = __phys_to_pfn(PXA2XX_SMEMC_BASE),
 163                 .length         = SMEMC_SIZE,
 164                 .type           = MT_DEVICE
 165         }, {    /* UNCACHED_PHYS_0 */
 166                 .virtual        = UNCACHED_PHYS_0,
 167                 .pfn            = __phys_to_pfn(0x00000000),
 168                 .length         = UNCACHED_PHYS_0_SIZE,
 169                 .type           = MT_DEVICE
 170         },
 171 };
 172
 173 void __init pxa25x_map_io(void)
 174 {
 175         pxa_map_io();
 176         iotable_init(ARRAY_AND_SIZE(pxa25x_io_desc));
 177         pxa25x_get_clk_frequency_khz(1);
 178 }
 179
 180 static struct pxa_gpio_platform_data pxa25x_gpio_info __initdata = {
 181         .irq_base       = PXA_GPIO_TO_IRQ(0),
 182         .gpio_set_wake  = gpio_set_wake,
 183 };
 184
 185 static struct platform_device *pxa25x_devices[] __initdata = {
 186         &pxa25x_device_udc,
 187         &pxa_device_pmu,
 188         &pxa_device_i2s,
 189         &sa1100_device_rtc,
 190         &pxa25x_device_ssp,
 191         &pxa25x_device_nssp,
 192         &pxa25x_device_assp,
 193         &pxa25x_device_pwm0,
 194         &pxa25x_device_pwm1,
 195         &pxa_device_asoc_platform,
 196 };
 197
 198 static const struct dma_slave_map pxa25x_slave_map[] = {
 199         /* PXA25x, PXA27x and PXA3xx common entries */
 200         { "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
 201         { "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
 202         { "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
 203           PDMA_FILTER_PARAM(LOWEST, 10) },
 204         { "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
 205         { "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
 206         { "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 207         { "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 208         { "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 209         { "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 210         { "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
 211         { "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
 212         { "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
 213         { "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },
 214
 215         /* PXA25x specific map */
 216         { "pxa25x-ssp.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 217         { "pxa25x-ssp.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 218         { "pxa25x-nssp.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 219         { "pxa25x-nssp.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 220         { "pxa25x-nssp.2", "rx", PDMA_FILTER_PARAM(LOWEST, 23) },
 221         { "pxa25x-nssp.2", "tx", PDMA_FILTER_PARAM(LOWEST, 24) },
 222 };
 223
 224 static struct mmp_dma_platdata pxa25x_dma_pdata = {
 225         .dma_channels   = 16,
 226         .nb_requestors  = 40,
 227         .slave_map      = pxa25x_slave_map,
 228         .slave_map_cnt  = ARRAY_SIZE(pxa25x_slave_map),
 229 };
 230
 231 static int __init pxa25x_init(void)
 232 {
 233         int ret = 0;
 234
 235         if (cpu_is_pxa25x()) {
 236
 237                 pxa_register_wdt(RCSR);
 238
 239                 pxa25x_init_pm();
 240
 241                 register_syscore_ops(&pxa_irq_syscore_ops);
 242                 register_syscore_ops(&pxa2xx_mfp_syscore_ops);
 243
 244                 if (!of_have_populated_dt()) {
 245                         pxa2xx_set_dmac_info(&pxa25x_dma_pdata);
 246                         pxa_register_device(&pxa25x_device_gpio, &pxa25x_gpio_info);
 247                         ret = platform_add_devices(pxa25x_devices,
 248                                                    ARRAY_SIZE(pxa25x_devices));
 249                 }
 250         }
 251
 252         return ret;
 253 }
 254
 255 postcore_initcall(pxa25x_init);