arch/arm/mach-pxa/pxa25x.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/pxa25x.c
   3  *
   4  *  Author:     Nicolas Pitre
   5  *  Created:    Jun 15, 2001
   6  *  Copyright:  MontaVista Software Inc.
   7  *
   8  * Code specific to PXA21x/25x/26x variants.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * Since this file should be linked before any other machine specific file,
  15  * the __initcall() here will be executed first.  This serves as default
  16  * initialization stuff for PXA machines which can be overridden later if
  17  * need be.
  18  */
  19 #include <linux/dmaengine.h>
  20 #include <linux/dma/pxa-dma.h>
  21 #include <linux/gpio.h>
  22 #include <linux/gpio-pxa.h>
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/init.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/suspend.h>
  28 #include <linux/syscore_ops.h>
  29 #include <linux/irq.h>
  30 #include <linux/irqchip.h>
  31 #include <linux/platform_data/mmp_dma.h>
  32
  33 #include <asm/mach/map.h>
  34 #include <asm/suspend.h>
  35 #include <mach/hardware.h>
  36 #include <mach/irqs.h>
  37 #include "pxa25x.h"
  38 #include <mach/reset.h>
  39 #include "pm.h"
  40 #include <mach/dma.h>
  41 #include <mach/smemc.h>
  42
  43 #include "generic.h"
  44 #include "devices.h"
  45
  46 /*
  47  * Various clock factors driven by the CCCR register.
  48  */
  49
  50 #ifdef CONFIG_PM
  51
  52 #define SAVE(x)         sleep_save[SLEEP_SAVE_##x] = x
  53 #define RESTORE(x)      x = sleep_save[SLEEP_SAVE_##x]
  54
  55 /*
  56  * List of global PXA peripheral registers to preserve.
  57  * More ones like CP and general purpose register values are preserved
  58  * with the stack pointer in sleep.S.
  59  */
  60 enum {
  61         SLEEP_SAVE_PSTR,
  62         SLEEP_SAVE_COUNT
  63 };
  64
  65
  66 static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
  67 {
  68         SAVE(PSTR);
  69 }
  70
  71 static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
  72 {
  73         RESTORE(PSTR);
  74 }
  75
  76 static void pxa25x_cpu_pm_enter(suspend_state_t state)
  77 {
  78         /* Clear reset status */
  79         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
  80
  81         switch (state) {
  82         case PM_SUSPEND_MEM:
  83                 cpu_suspend(PWRMODE_SLEEP, pxa25x_finish_suspend);
  84                 break;
  85         }
  86 }
  87
  88 static int pxa25x_cpu_pm_prepare(void)
  89 {
  90         /* set resume return address */
  91         PSPR = __pa_symbol(cpu_resume);
  92         return 0;
  93 }
  94
  95 static void pxa25x_cpu_pm_finish(void)
  96 {
  97         /* ensure not to come back here if it wasn't intended */
  98         PSPR = 0;
  99 }
 100
 101 static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
 102         .save_count     = SLEEP_SAVE_COUNT,
 103         .valid          = suspend_valid_only_mem,
 104         .save           = pxa25x_cpu_pm_save,
 105         .restore        = pxa25x_cpu_pm_restore,
 106         .enter          = pxa25x_cpu_pm_enter,
 107         .prepare        = pxa25x_cpu_pm_prepare,
 108         .finish         = pxa25x_cpu_pm_finish,
 109 };
 110
 111 static void __init pxa25x_init_pm(void)
 112 {
 113         pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
 114 }
 115 #else
 116 static inline void pxa25x_init_pm(void) {}
 117 #endif
 118
 119 /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
 120  */
 121
 122 static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
 123 {
 124         int gpio = pxa_irq_to_gpio(d->irq);
 125         uint32_t mask = 0;
 126
 127         if (gpio >= 0 && gpio < 85)
 128                 return gpio_set_wake(gpio, on);
 129
 130         if (d->irq == IRQ_RTCAlrm) {
 131                 mask = PWER_RTC;
 132                 goto set_pwer;
 133         }
 134
 135         return -EINVAL;
 136
 137 set_pwer:
 138         if (on)
 139                 PWER |= mask;
 140         else
 141                 PWER &=~mask;
 142
 143         return 0;
 144 }
 145
 146 void __init pxa25x_init_irq(void)
 147 {
 148         pxa_init_irq(32, pxa25x_set_wake);
 149 }
 150
 151 #ifdef CONFIG_CPU_PXA26x
 152 void __init pxa26x_init_irq(void)
 153 {
 154         pxa_init_irq(32, pxa25x_set_wake);
 155 }
 156 #endif
 157
 158 static int __init __init
 159 pxa25x_dt_init_irq(struct device_node *node, struct device_node *parent)
 160 {
 161         pxa_dt_irq_init(pxa25x_set_wake);
 162         set_handle_irq(icip_handle_irq);
 163
 164         return 0;
 165 }
 166 IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq);
 167
 168 static struct map_desc pxa25x_io_desc[] __initdata = {
 169         {       /* Mem Ctl */
 170                 .virtual        = (unsigned long)SMEMC_VIRT,
 171                 .pfn            = __phys_to_pfn(PXA2XX_SMEMC_BASE),
 172                 .length         = SMEMC_SIZE,
 173                 .type           = MT_DEVICE
 174         }, {    /* UNCACHED_PHYS_0 */
 175                 .virtual        = UNCACHED_PHYS_0,
 176                 .pfn            = __phys_to_pfn(0x00000000),
 177                 .length         = UNCACHED_PHYS_0_SIZE,
 178                 .type           = MT_DEVICE
 179         },
 180 };
 181
 182 void __init pxa25x_map_io(void)
 183 {
 184         pxa_map_io();
 185         iotable_init(ARRAY_AND_SIZE(pxa25x_io_desc));
 186         pxa25x_get_clk_frequency_khz(1);
 187 }
 188
 189 static struct pxa_gpio_platform_data pxa25x_gpio_info __initdata = {
 190         .irq_base       = PXA_GPIO_TO_IRQ(0),
 191         .gpio_set_wake  = gpio_set_wake,
 192 };
 193
 194 static struct platform_device *pxa25x_devices[] __initdata = {
 195         &pxa25x_device_udc,
 196         &pxa_device_pmu,
 197         &pxa_device_i2s,
 198         &sa1100_device_rtc,
 199         &pxa25x_device_ssp,
 200         &pxa25x_device_nssp,
 201         &pxa25x_device_assp,
 202         &pxa25x_device_pwm0,
 203         &pxa25x_device_pwm1,
 204         &pxa_device_asoc_platform,
 205 };
 206
 207 static const struct dma_slave_map pxa25x_slave_map[] = {
 208         /* PXA25x, PXA27x and PXA3xx common entries */
 209         { "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
 210         { "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
 211         { "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
 212           PDMA_FILTER_PARAM(LOWEST, 10) },
 213         { "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
 214         { "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
 215         { "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 216         { "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 217         { "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 218         { "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 219         { "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
 220         { "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
 221         { "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
 222         { "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },
 223
 224         /* PXA25x specific map */
 225         { "pxa25x-ssp.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
 226         { "pxa25x-ssp.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
 227         { "pxa25x-nssp.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
 228         { "pxa25x-nssp.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
 229         { "pxa25x-nssp.2", "rx", PDMA_FILTER_PARAM(LOWEST, 23) },
 230         { "pxa25x-nssp.2", "tx", PDMA_FILTER_PARAM(LOWEST, 24) },
 231 };
 232
 233 static struct mmp_dma_platdata pxa25x_dma_pdata = {
 234         .dma_channels   = 16,
 235         .nb_requestors  = 40,
 236         .slave_map      = pxa25x_slave_map,
 237         .slave_map_cnt  = ARRAY_SIZE(pxa25x_slave_map),
 238 };
 239
 240 static int __init pxa25x_init(void)
 241 {
 242         int ret = 0;
 243
 244         if (cpu_is_pxa25x()) {
 245
 246                 reset_status = RCSR;
 247
 248                 pxa25x_init_pm();
 249
 250                 register_syscore_ops(&pxa_irq_syscore_ops);
 251                 register_syscore_ops(&pxa2xx_mfp_syscore_ops);
 252
 253                 if (!of_have_populated_dt()) {
 254                         pxa2xx_set_dmac_info(&pxa25x_dma_pdata);
 255                         pxa_register_device(&pxa25x_device_gpio, &pxa25x_gpio_info);
 256                         ret = platform_add_devices(pxa25x_devices,
 257                                                    ARRAY_SIZE(pxa25x_devices));
 258                 }
 259         }
 260
 261         return ret;
 262 }
 263
 264 postcore_initcall(pxa25x_init);