1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-pxa/pxa27x.c
5 * Author: Nicolas Pitre
6 * Created: Nov 05, 2002
7 * Copyright: MontaVista Software Inc.
9 * Code specific to PXA27x aka Bulverde.
11 #include <linux/dmaengine.h>
12 #include <linux/dma/pxa-dma.h>
13 #include <linux/gpio.h>
14 #include <linux/gpio-pxa.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/irqchip.h>
19 #include <linux/suspend.h>
20 #include <linux/platform_device.h>
21 #include <linux/syscore_ops.h>
23 #include <linux/irq.h>
24 #include <linux/platform_data/i2c-pxa.h>
25 #include <linux/platform_data/mmp_dma.h>
26 #include <linux/soc/pxa/cpu.h>
27 #include <linux/soc/pxa/smemc.h>
29 #include <asm/mach/map.h>
31 #include <asm/suspend.h>
35 #include <linux/platform_data/pxa2xx_udc.h>
36 #include <linux/platform_data/usb-ohci-pxa27x.h>
37 #include <linux/platform_data/asoc-pxa.h>
44 #include <linux/clk-provider.h>
45 #include <linux/clkdev.h>
47 void pxa27x_clear_otgph(void)
49 if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
52 EXPORT_SYMBOL(pxa27x_clear_otgph);
54 static unsigned long ac97_reset_config[] = {
55 GPIO113_AC97_nRESET_GPIO_HIGH,
57 GPIO95_AC97_nRESET_GPIO_HIGH,
61 void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio)
64 * This helper function is used to work around a bug in the pxa27x's
65 * ac97 controller during a warm reset. The configuration of the
66 * reset_gpio is changed as follows:
67 * to_gpio == true: configured to generic output gpio and driven high
68 * to_gpio == false: configured to ac97 controller alt fn AC97_nRESET
71 if (reset_gpio == 113)
72 pxa2xx_mfp_config(to_gpio ? &ac97_reset_config[0] :
73 &ac97_reset_config[1], 1);
76 pxa2xx_mfp_config(to_gpio ? &ac97_reset_config[2] :
77 &ac97_reset_config[3], 1);
79 EXPORT_SYMBOL_GPL(pxa27x_configure_ac97reset);
83 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
84 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
87 * allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
89 static unsigned int pwrmode = PWRMODE_SLEEP;
92 * List of global PXA peripheral registers to preserve.
93 * More ones like CP and general purpose register values are preserved
94 * with the stack pointer in sleep.S.
103 static void pxa27x_cpu_pm_save(unsigned long *sleep_save)
105 sleep_save[SLEEP_SAVE_MDREFR] = __raw_readl(MDREFR);
111 static void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
113 __raw_writel(sleep_save[SLEEP_SAVE_MDREFR], MDREFR);
116 PSSR = PSSR_RDH | PSSR_PH;
121 static void pxa27x_cpu_pm_enter(suspend_state_t state)
123 extern void pxa_cpu_standby(void);
124 #ifndef CONFIG_IWMMXT
127 #ifndef CONFIG_AS_IS_LLVM
128 asm volatile(".arch_extension xscale\n\t"
129 "mra %Q0, %R0, acc0" : "=r" (acc0));
131 asm volatile("mrrc p0, 0, %Q0, %R0, c0" : "=r" (acc0));
135 /* ensure voltage-change sequencer not initiated, which hangs */
138 /* Clear edge-detect status register. */
141 /* Clear reset status */
142 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
145 case PM_SUSPEND_STANDBY:
149 cpu_suspend(pwrmode, pxa27x_finish_suspend);
150 #ifndef CONFIG_IWMMXT
151 #ifndef CONFIG_AS_IS_LLVM
152 asm volatile(".arch_extension xscale\n\t"
153 "mar acc0, %Q0, %R0" : "=r" (acc0));
155 asm volatile("mcrr p0, 0, %Q0, %R0, c0" :: "r" (acc0));
162 static int pxa27x_cpu_pm_valid(suspend_state_t state)
164 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
167 static int pxa27x_cpu_pm_prepare(void)
169 /* set resume return address */
170 PSPR = __pa_symbol(cpu_resume);
174 static void pxa27x_cpu_pm_finish(void)
176 /* ensure not to come back here if it wasn't intended */
180 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
181 .save_count = SLEEP_SAVE_COUNT,
182 .save = pxa27x_cpu_pm_save,
183 .restore = pxa27x_cpu_pm_restore,
184 .valid = pxa27x_cpu_pm_valid,
185 .enter = pxa27x_cpu_pm_enter,
186 .prepare = pxa27x_cpu_pm_prepare,
187 .finish = pxa27x_cpu_pm_finish,
190 static void __init pxa27x_init_pm(void)
192 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
195 static inline void pxa27x_init_pm(void) {}
198 /* PXA27x: Various gpios can issue wakeup events. This logic only
199 * handles the simple cases, not the WEMUX2 and WEMUX3 options
201 static int pxa27x_set_wake(struct irq_data *d, unsigned int on)
203 int gpio = pxa_irq_to_gpio(d->irq);
206 if (gpio >= 0 && gpio < 128)
207 return gpio_set_wake(gpio, on);
209 if (d->irq == IRQ_KEYPAD)
210 return keypad_set_wake(on);
231 void __init pxa27x_init_irq(void)
233 pxa_init_irq(34, pxa27x_set_wake);
234 set_handle_irq(pxa27x_handle_irq);
238 pxa27x_dt_init_irq(struct device_node *node, struct device_node *parent)
240 pxa_dt_irq_init(pxa27x_set_wake);
241 set_handle_irq(ichp_handle_irq);
245 IRQCHIP_DECLARE(pxa27x_intc, "marvell,pxa-intc", pxa27x_dt_init_irq);
247 static struct map_desc pxa27x_io_desc[] __initdata = {
249 .virtual = (unsigned long)SMEMC_VIRT,
250 .pfn = __phys_to_pfn(PXA2XX_SMEMC_BASE),
251 .length = SMEMC_SIZE,
253 }, { /* UNCACHED_PHYS_0 */
254 .virtual = UNCACHED_PHYS_0,
255 .pfn = __phys_to_pfn(0x00000000),
256 .length = UNCACHED_PHYS_0_SIZE,
261 void __init pxa27x_map_io(void)
264 iotable_init(ARRAY_AND_SIZE(pxa27x_io_desc));
265 pxa27x_get_clk_frequency_khz(1);
269 * device registration specific to PXA27x.
271 void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
276 pxa_register_device(&pxa27x_device_i2c_power, info);
279 static struct pxa_gpio_platform_data pxa27x_gpio_info __initdata = {
280 .irq_base = PXA_GPIO_TO_IRQ(0),
281 .gpio_set_wake = gpio_set_wake,
284 static struct platform_device *devices[] __initdata = {
288 &pxa_device_asoc_ssp1,
289 &pxa_device_asoc_ssp2,
290 &pxa_device_asoc_ssp3,
291 &pxa_device_asoc_platform,
300 static const struct dma_slave_map pxa27x_slave_map[] = {
301 /* PXA25x, PXA27x and PXA3xx common entries */
302 { "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
303 { "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
304 { "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
305 PDMA_FILTER_PARAM(LOWEST, 10) },
306 { "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
307 { "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
308 { "pxa-ssp-dai.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
309 { "pxa-ssp-dai.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
310 { "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
311 { "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
312 { "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
313 { "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
314 { "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
315 { "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },
316 { "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 66) },
317 { "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 67) },
319 /* PXA27x specific map */
320 { "pxa2xx-i2s", "rx", PDMA_FILTER_PARAM(LOWEST, 2) },
321 { "pxa2xx-i2s", "tx", PDMA_FILTER_PARAM(LOWEST, 3) },
322 { "pxa27x-camera.0", "CI_Y", PDMA_FILTER_PARAM(HIGHEST, 68) },
323 { "pxa27x-camera.0", "CI_U", PDMA_FILTER_PARAM(HIGHEST, 69) },
324 { "pxa27x-camera.0", "CI_V", PDMA_FILTER_PARAM(HIGHEST, 70) },
327 static struct mmp_dma_platdata pxa27x_dma_pdata = {
330 .slave_map = pxa27x_slave_map,
331 .slave_map_cnt = ARRAY_SIZE(pxa27x_slave_map),
334 static int __init pxa27x_init(void)
338 if (cpu_is_pxa27x()) {
340 pxa_register_wdt(RCSR);
344 register_syscore_ops(&pxa_irq_syscore_ops);
345 register_syscore_ops(&pxa2xx_mfp_syscore_ops);
347 if (!of_have_populated_dt()) {
348 pxa_register_device(&pxa27x_device_gpio,
350 pxa2xx_set_dmac_info(&pxa27x_dma_pdata);
351 ret = platform_add_devices(devices,
352 ARRAY_SIZE(devices));
359 postcore_initcall(pxa27x_init);