2 * linux/arch/arm/mach-pxa/pxa3xx.c
4 * code specific to pxa3xx aka Monahans
6 * Copyright (C) 2006 Marvell International Ltd.
8 * 2007-09-02: eric miao <eric.miao@marvell.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 #include <linux/dmaengine.h>
16 #include <linux/dma/pxa-dma.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/gpio-pxa.h>
22 #include <linux/platform_device.h>
23 #include <linux/irq.h>
24 #include <linux/irqchip.h>
27 #include <linux/syscore_ops.h>
28 #include <linux/platform_data/i2c-pxa.h>
29 #include <linux/platform_data/mmp_dma.h>
31 #include <asm/mach/map.h>
32 #include <asm/suspend.h>
33 #include <mach/hardware.h>
34 #include <mach/pxa3xx-regs.h>
35 #include <mach/reset.h>
36 #include <linux/platform_data/usb-ohci-pxa27x.h>
39 #include <mach/smemc.h>
40 #include <mach/irqs.h>
45 #define PECR_IE(n) ((1 << ((n) * 2)) << 28)
46 #define PECR_IS(n) ((1 << ((n) * 2)) << 29)
48 extern void __init pxa_dt_irq_init(int (*fn)(struct irq_data *, unsigned int));
51 * NAND NFC: DFI bus arbitration subset
53 #define NDCR (*(volatile u32 __iomem*)(NAND_VIRT + 0))
54 #define NDCR_ND_ARB_EN (1 << 12)
55 #define NDCR_ND_ARB_CNTL (1 << 19)
59 #define ISRAM_START 0x5c000000
60 #define ISRAM_SIZE SZ_256K
62 static void __iomem *sram;
63 static unsigned long wakeup_src;
66 * Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic
67 * memory controller has to be reinitialised, so we place some code
68 * in the SRAM to perform this function.
70 * We disable FIQs across the standby - otherwise, we might receive a
71 * FIQ while the SDRAM is unavailable.
73 static void pxa3xx_cpu_standby(unsigned int pwrmode)
75 void (*fn)(unsigned int) = (void __force *)(sram + 0x8000);
77 memcpy_toio(sram + 0x8000, pm_enter_standby_start,
78 pm_enter_standby_end - pm_enter_standby_start);
96 * NOTE: currently, the OBM (OEM Boot Module) binary comes along with
97 * PXA3xx development kits assumes that the resuming process continues
98 * with the address stored within the first 4 bytes of SDRAM. The PSPR
99 * register is used privately by BootROM and OBM, and _must_ be set to
100 * 0x5c014000 for the moment.
102 static void pxa3xx_cpu_pm_suspend(void)
104 volatile unsigned long *p = (volatile void *)0xc0000000;
105 unsigned long saved_data = *p;
106 #ifndef CONFIG_IWMMXT
109 asm volatile(".arch_extension xscale\n\t"
110 "mra %Q0, %R0, acc0" : "=r" (acc0));
113 /* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */
114 CKENA |= (1 << CKEN_BOOT) | (1 << CKEN_TPM);
115 CKENB |= 1 << (CKEN_HSIO2 & 0x1f);
117 /* clear and setup wakeup source */
123 PCFR |= (1u << 13); /* L1_DIS */
124 PCFR &= ~((1u << 12) | (1u << 1)); /* L0_EN | SL_ROD */
128 /* overwrite with the resume address */
129 *p = __pa_symbol(cpu_resume);
131 cpu_suspend(0, pxa3xx_finish_suspend);
137 #ifndef CONFIG_IWMMXT
138 asm volatile(".arch_extension xscale\n\t"
139 "mar acc0, %Q0, %R0" : "=r" (acc0));
143 static void pxa3xx_cpu_pm_enter(suspend_state_t state)
146 * Don't sleep if no wakeup sources are defined
148 if (wakeup_src == 0) {
149 printk(KERN_ERR "Not suspending: no wakeup sources\n");
154 case PM_SUSPEND_STANDBY:
155 pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2);
159 pxa3xx_cpu_pm_suspend();
164 static int pxa3xx_cpu_pm_valid(suspend_state_t state)
166 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
169 static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = {
170 .valid = pxa3xx_cpu_pm_valid,
171 .enter = pxa3xx_cpu_pm_enter,
174 static void __init pxa3xx_init_pm(void)
176 sram = ioremap(ISRAM_START, ISRAM_SIZE);
178 printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n");
183 * Since we copy wakeup code into the SRAM, we need to ensure
184 * that it is preserved over the low power modes. Note: bit 8
185 * is undocumented in the developer manual, but must be set.
187 AD1R |= ADXR_L2 | ADXR_R0;
188 AD2R |= ADXR_L2 | ADXR_R0;
189 AD3R |= ADXR_L2 | ADXR_R0;
192 * Clear the resume enable registers.
199 pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns;
202 static int pxa3xx_set_wake(struct irq_data *d, unsigned int on)
204 unsigned long flags, mask = 0;
208 mask = ADXER_MFP_WSSP3;
221 mask = ADXER_MFP_WAC97;
227 mask = ADXER_MFP_WSSP2;
230 mask = ADXER_MFP_WI2C;
233 mask = ADXER_MFP_WUART3;
236 mask = ADXER_MFP_WUART2;
239 mask = ADXER_MFP_WUART1;
242 mask = ADXER_MFP_WMMC1;
245 mask = ADXER_MFP_WSSP1;
251 mask = ADXER_MFP_WSSP4;
260 mask = ADXER_MFP_WMMC2;
263 mask = ADXER_MFP_WFLASH;
269 mask = ADXER_WEXTWAKE0;
272 mask = ADXER_WEXTWAKE1;
275 mask = ADXER_MFP_GEN12;
281 local_irq_save(flags);
286 local_irq_restore(flags);
291 static inline void pxa3xx_init_pm(void) {}
292 #define pxa3xx_set_wake NULL
295 static void pxa_ack_ext_wakeup(struct irq_data *d)
297 PECR |= PECR_IS(d->irq - IRQ_WAKEUP0);
300 static void pxa_mask_ext_wakeup(struct irq_data *d)
303 PECR &= ~PECR_IE(d->irq - IRQ_WAKEUP0);
306 static void pxa_unmask_ext_wakeup(struct irq_data *d)
309 PECR |= PECR_IE(d->irq - IRQ_WAKEUP0);
312 static int pxa_set_ext_wakeup_type(struct irq_data *d, unsigned int flow_type)
314 if (flow_type & IRQ_TYPE_EDGE_RISING)
315 PWER |= 1 << (d->irq - IRQ_WAKEUP0);
317 if (flow_type & IRQ_TYPE_EDGE_FALLING)
318 PWER |= 1 << (d->irq - IRQ_WAKEUP0 + 2);
323 static struct irq_chip pxa_ext_wakeup_chip = {
325 .irq_ack = pxa_ack_ext_wakeup,
326 .irq_mask = pxa_mask_ext_wakeup,
327 .irq_unmask = pxa_unmask_ext_wakeup,
328 .irq_set_type = pxa_set_ext_wakeup_type,
331 static void __init pxa_init_ext_wakeup_irq(int (*fn)(struct irq_data *,
336 for (irq = IRQ_WAKEUP0; irq <= IRQ_WAKEUP1; irq++) {
337 irq_set_chip_and_handler(irq, &pxa_ext_wakeup_chip,
339 irq_clear_status_flags(irq, IRQ_NOREQUEST);
342 pxa_ext_wakeup_chip.irq_set_wake = fn;
345 static void __init __pxa3xx_init_irq(void)
347 /* enable CP6 access */
349 __asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value));
351 __asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));
353 pxa_init_ext_wakeup_irq(pxa3xx_set_wake);
356 void __init pxa3xx_init_irq(void)
359 pxa_init_irq(56, pxa3xx_set_wake);
363 static int __init __init
364 pxa3xx_dt_init_irq(struct device_node *node, struct device_node *parent)
367 pxa_dt_irq_init(pxa3xx_set_wake);
368 set_handle_irq(ichp_handle_irq);
372 IRQCHIP_DECLARE(pxa3xx_intc, "marvell,pxa-intc", pxa3xx_dt_init_irq);
373 #endif /* CONFIG_OF */
375 static struct map_desc pxa3xx_io_desc[] __initdata = {
377 .virtual = (unsigned long)SMEMC_VIRT,
378 .pfn = __phys_to_pfn(PXA3XX_SMEMC_BASE),
379 .length = SMEMC_SIZE,
382 .virtual = (unsigned long)NAND_VIRT,
383 .pfn = __phys_to_pfn(NAND_PHYS),
389 void __init pxa3xx_map_io(void)
392 iotable_init(ARRAY_AND_SIZE(pxa3xx_io_desc));
393 pxa3xx_get_clk_frequency_khz(1);
397 * device registration specific to PXA3xx.
400 void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info)
402 pxa_register_device(&pxa3xx_device_i2c_power, info);
405 static struct pxa_gpio_platform_data pxa3xx_gpio_pdata = {
406 .irq_base = PXA_GPIO_TO_IRQ(0),
409 static struct platform_device *devices[] __initdata = {
413 &pxa_device_asoc_ssp1,
414 &pxa_device_asoc_ssp2,
415 &pxa_device_asoc_ssp3,
416 &pxa_device_asoc_ssp4,
417 &pxa_device_asoc_platform,
427 static const struct dma_slave_map pxa3xx_slave_map[] = {
428 /* PXA25x, PXA27x and PXA3xx common entries */
429 { "pxa2xx-ac97", "pcm_pcm_mic_mono", PDMA_FILTER_PARAM(LOWEST, 8) },
430 { "pxa2xx-ac97", "pcm_pcm_aux_mono_in", PDMA_FILTER_PARAM(LOWEST, 9) },
431 { "pxa2xx-ac97", "pcm_pcm_aux_mono_out",
432 PDMA_FILTER_PARAM(LOWEST, 10) },
433 { "pxa2xx-ac97", "pcm_pcm_stereo_in", PDMA_FILTER_PARAM(LOWEST, 11) },
434 { "pxa2xx-ac97", "pcm_pcm_stereo_out", PDMA_FILTER_PARAM(LOWEST, 12) },
435 { "pxa-ssp-dai.0", "rx", PDMA_FILTER_PARAM(LOWEST, 13) },
436 { "pxa-ssp-dai.0", "tx", PDMA_FILTER_PARAM(LOWEST, 14) },
437 { "pxa-ssp-dai.1", "rx", PDMA_FILTER_PARAM(LOWEST, 15) },
438 { "pxa-ssp-dai.1", "tx", PDMA_FILTER_PARAM(LOWEST, 16) },
439 { "pxa2xx-ir", "rx", PDMA_FILTER_PARAM(LOWEST, 17) },
440 { "pxa2xx-ir", "tx", PDMA_FILTER_PARAM(LOWEST, 18) },
441 { "pxa2xx-mci.0", "rx", PDMA_FILTER_PARAM(LOWEST, 21) },
442 { "pxa2xx-mci.0", "tx", PDMA_FILTER_PARAM(LOWEST, 22) },
443 { "pxa-ssp-dai.2", "rx", PDMA_FILTER_PARAM(LOWEST, 66) },
444 { "pxa-ssp-dai.2", "tx", PDMA_FILTER_PARAM(LOWEST, 67) },
446 /* PXA3xx specific map */
447 { "pxa-ssp-dai.3", "rx", PDMA_FILTER_PARAM(LOWEST, 2) },
448 { "pxa-ssp-dai.3", "tx", PDMA_FILTER_PARAM(LOWEST, 3) },
449 { "pxa2xx-mci.1", "rx", PDMA_FILTER_PARAM(LOWEST, 93) },
450 { "pxa2xx-mci.1", "tx", PDMA_FILTER_PARAM(LOWEST, 94) },
451 { "pxa3xx-nand", "data", PDMA_FILTER_PARAM(LOWEST, 97) },
452 { "pxa2xx-mci.2", "rx", PDMA_FILTER_PARAM(LOWEST, 100) },
453 { "pxa2xx-mci.2", "tx", PDMA_FILTER_PARAM(LOWEST, 101) },
456 static struct mmp_dma_platdata pxa3xx_dma_pdata = {
458 .nb_requestors = 100,
459 .slave_map = pxa3xx_slave_map,
460 .slave_map_cnt = ARRAY_SIZE(pxa3xx_slave_map),
463 static int __init pxa3xx_init(void)
467 if (cpu_is_pxa3xx()) {
472 * clear RDH bit every time after reset
474 * Note: the last 3 bits DxS are write-1-to-clear so carefully
475 * preserve them here in case they will be referenced later
477 ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
480 * Disable DFI bus arbitration, to prevent a system bus lock if
481 * somebody disables the NAND clock (unused clock) while this
484 NDCR = (NDCR & ~NDCR_ND_ARB_EN) | NDCR_ND_ARB_CNTL;
488 enable_irq_wake(IRQ_WAKEUP0);
490 enable_irq_wake(IRQ_WAKEUP1);
492 register_syscore_ops(&pxa_irq_syscore_ops);
493 register_syscore_ops(&pxa3xx_mfp_syscore_ops);
495 if (of_have_populated_dt())
498 pxa2xx_set_dmac_info(&pxa3xx_dma_pdata);
499 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
502 if (cpu_is_pxa300() || cpu_is_pxa310() || cpu_is_pxa320()) {
503 platform_device_add_data(&pxa3xx_device_gpio,
505 sizeof(pxa3xx_gpio_pdata));
506 ret = platform_device_register(&pxa3xx_device_gpio);
513 postcore_initcall(pxa3xx_init);