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 */
58enum {
59 SLEEP_SAVE_PSTR,
60 SLEEP_SAVE_COUNT
61};
62
63
64static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
65{
66 SAVE(PSTR);
67}
68
69static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
70{
71 RESTORE(PSTR);
72}
73
74static 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
86static int pxa25x_cpu_pm_prepare(void)
87{
88 /* set resume return address */
89 PSPR = __pa_symbol(cpu_resume);
90 return 0;
91}
92
93static void pxa25x_cpu_pm_finish(void)
94{
95 /* ensure not to come back here if it wasn't intended */
96 PSPR = 0;
97}
98
99static 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
109static void __init pxa25x_init_pm(void)
110{
111 pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
112}
113#else
114static inline void pxa25x_init_pm(void) {}
115#endif
116
117/* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
118 */
119
120static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
121{
122 int gpio = pxa_irq_to_gpio(irq: 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
135set_pwer:
136 if (on)
137 PWER |= mask;
138 else
139 PWER &=~mask;
140
141 return 0;
142}
143
144void __init pxa25x_init_irq(void)
145{
146 pxa_init_irq(irq_nr: 32, set_wake: pxa25x_set_wake);
147 set_handle_irq(pxa25x_handle_irq);
148}
149
150static int __init __init
151pxa25x_dt_init_irq(struct device_node *node, struct device_node *parent)
152{
153 pxa_dt_irq_init(fn: pxa25x_set_wake);
154 set_handle_irq(icip_handle_irq);
155
156 return 0;
157}
158IRQCHIP_DECLARE(pxa25x_intc, "marvell,pxa-intc", pxa25x_dt_init_irq);
159
160static 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
174void __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
181static 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
195static 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
221static 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
228static 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(syscore: &pxa_irq_syscore);
239 register_syscore(syscore: &pxa2xx_mfp_syscore);
240
241 if (!of_have_populated_dt()) {
242 software_node_register(node: &pxa2xx_gpiochip_node);
243 pxa2xx_set_dmac_info(dma_pdata: &pxa25x_dma_pdata);
244 ret = platform_add_devices(pxa25x_devices,
245 ARRAY_SIZE(pxa25x_devices));
246 }
247 }
248
249 return ret;
250}
251
252postcore_initcall(pxa25x_init);
253

source code of linux/arch/arm/mach-pxa/pxa25x.c