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); 253