diff options
Diffstat (limited to 'kernel/arch/arm/mach-pxa/pxa3xx.c')
| -rw-r--r-- | kernel/arch/arm/mach-pxa/pxa3xx.c | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-pxa/pxa3xx.c b/kernel/arch/arm/mach-pxa/pxa3xx.c new file mode 100644 index 000000000..edcbd9c0b --- /dev/null +++ b/kernel/arch/arm/mach-pxa/pxa3xx.c @@ -0,0 +1,507 @@ +/* + * linux/arch/arm/mach-pxa/pxa3xx.c + * + * code specific to pxa3xx aka Monahans + * + * Copyright (C) 2006 Marvell International Ltd. + * + * 2007-09-02: eric miao <eric.miao@marvell.com> + * initial version + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/gpio-pxa.h> +#include <linux/pm.h> +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/syscore_ops.h> +#include <linux/i2c/pxa-i2c.h> + +#include <asm/mach/map.h> +#include <asm/suspend.h> +#include <mach/hardware.h> +#include <mach/pxa3xx-regs.h> +#include <mach/reset.h> +#include <linux/platform_data/usb-ohci-pxa27x.h> +#include <mach/pm.h> +#include <mach/dma.h> +#include <mach/smemc.h> +#include <mach/irqs.h> + +#include "generic.h" +#include "devices.h" +#include "clock.h" + +#define PECR_IE(n) ((1 << ((n) * 2)) << 28) +#define PECR_IS(n) ((1 << ((n) * 2)) << 29) + +extern void __init pxa_dt_irq_init(int (*fn)(struct irq_data *, unsigned int)); + +static DEFINE_PXA3_CKEN(pxa3xx_ffuart, FFUART, 14857000, 1); +static DEFINE_PXA3_CKEN(pxa3xx_btuart, BTUART, 14857000, 1); +static DEFINE_PXA3_CKEN(pxa3xx_stuart, STUART, 14857000, 1); +static DEFINE_PXA3_CKEN(pxa3xx_i2c, I2C, 32842000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_udc, UDC, 48000000, 5); +static DEFINE_PXA3_CKEN(pxa3xx_usbh, USBH, 48000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_u2d, USB2, 48000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_keypad, KEYPAD, 32768, 0); +static DEFINE_PXA3_CKEN(pxa3xx_ssp1, SSP1, 13000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_ssp2, SSP2, 13000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_ssp3, SSP3, 13000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_ssp4, SSP4, 13000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_pwm0, PWM0, 13000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_pwm1, PWM1, 13000000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_mmc1, MMC1, 19500000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_mmc2, MMC2, 19500000, 0); +static DEFINE_PXA3_CKEN(pxa3xx_gpio, GPIO, 13000000, 0); + +static DEFINE_CK(pxa3xx_lcd, LCD, &clk_pxa3xx_hsio_ops); +static DEFINE_CK(pxa3xx_smemc, SMC, &clk_pxa3xx_smemc_ops); +static DEFINE_CK(pxa3xx_camera, CAMERA, &clk_pxa3xx_hsio_ops); +static DEFINE_CK(pxa3xx_ac97, AC97, &clk_pxa3xx_ac97_ops); +static DEFINE_CLK(pxa3xx_pout, &clk_pxa3xx_pout_ops, 13000000, 70); + +static struct clk_lookup pxa3xx_clkregs[] = { + INIT_CLKREG(&clk_pxa3xx_pout, NULL, "CLK_POUT"), + /* Power I2C clock is always on */ + INIT_CLKREG(&clk_dummy, "pxa3xx-pwri2c.1", NULL), + INIT_CLKREG(&clk_pxa3xx_lcd, "pxa2xx-fb", NULL), + INIT_CLKREG(&clk_pxa3xx_camera, NULL, "CAMCLK"), + INIT_CLKREG(&clk_pxa3xx_ac97, NULL, "AC97CLK"), + INIT_CLKREG(&clk_pxa3xx_ffuart, "pxa2xx-uart.0", NULL), + INIT_CLKREG(&clk_pxa3xx_btuart, "pxa2xx-uart.1", NULL), + INIT_CLKREG(&clk_pxa3xx_stuart, "pxa2xx-uart.2", NULL), + INIT_CLKREG(&clk_pxa3xx_stuart, "pxa2xx-ir", "UARTCLK"), + INIT_CLKREG(&clk_pxa3xx_i2c, "pxa2xx-i2c.0", NULL), + INIT_CLKREG(&clk_pxa3xx_udc, "pxa27x-udc", NULL), + INIT_CLKREG(&clk_pxa3xx_usbh, "pxa27x-ohci", NULL), + INIT_CLKREG(&clk_pxa3xx_u2d, "pxa3xx-u2d", NULL), + INIT_CLKREG(&clk_pxa3xx_keypad, "pxa27x-keypad", NULL), + INIT_CLKREG(&clk_pxa3xx_ssp1, "pxa3xx-ssp.0", NULL), + INIT_CLKREG(&clk_pxa3xx_ssp2, "pxa3xx-ssp.1", NULL), + INIT_CLKREG(&clk_pxa3xx_ssp3, "pxa3xx-ssp.2", NULL), + INIT_CLKREG(&clk_pxa3xx_ssp4, "pxa3xx-ssp.3", NULL), + INIT_CLKREG(&clk_pxa3xx_pwm0, "pxa27x-pwm.0", NULL), + INIT_CLKREG(&clk_pxa3xx_pwm1, "pxa27x-pwm.1", NULL), + INIT_CLKREG(&clk_pxa3xx_mmc1, "pxa2xx-mci.0", NULL), + INIT_CLKREG(&clk_pxa3xx_mmc2, "pxa2xx-mci.1", NULL), + INIT_CLKREG(&clk_pxa3xx_smemc, "pxa2xx-pcmcia", NULL), + INIT_CLKREG(&clk_pxa3xx_gpio, "pxa3xx-gpio", NULL), + INIT_CLKREG(&clk_pxa3xx_gpio, "pxa93x-gpio", NULL), + INIT_CLKREG(&clk_dummy, "sa1100-rtc", NULL), +}; + +#ifdef CONFIG_PM + +#define ISRAM_START 0x5c000000 +#define ISRAM_SIZE SZ_256K + +static void __iomem *sram; +static unsigned long wakeup_src; + +/* + * Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic + * memory controller has to be reinitialised, so we place some code + * in the SRAM to perform this function. + * + * We disable FIQs across the standby - otherwise, we might receive a + * FIQ while the SDRAM is unavailable. + */ +static void pxa3xx_cpu_standby(unsigned int pwrmode) +{ + extern const char pm_enter_standby_start[], pm_enter_standby_end[]; + void (*fn)(unsigned int) = (void __force *)(sram + 0x8000); + + memcpy_toio(sram + 0x8000, pm_enter_standby_start, + pm_enter_standby_end - pm_enter_standby_start); + + AD2D0SR = ~0; + AD2D1SR = ~0; + AD2D0ER = wakeup_src; + AD2D1ER = 0; + ASCR = ASCR; + ARSR = ARSR; + + local_fiq_disable(); + fn(pwrmode); + local_fiq_enable(); + + AD2D0ER = 0; + AD2D1ER = 0; +} + +/* + * NOTE: currently, the OBM (OEM Boot Module) binary comes along with + * PXA3xx development kits assumes that the resuming process continues + * with the address stored within the first 4 bytes of SDRAM. The PSPR + * register is used privately by BootROM and OBM, and _must_ be set to + * 0x5c014000 for the moment. + */ +static void pxa3xx_cpu_pm_suspend(void) +{ + volatile unsigned long *p = (volatile void *)0xc0000000; + unsigned long saved_data = *p; +#ifndef CONFIG_IWMMXT + u64 acc0; + + asm volatile("mra %Q0, %R0, acc0" : "=r" (acc0)); +#endif + + extern int pxa3xx_finish_suspend(unsigned long); + + /* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */ + CKENA |= (1 << CKEN_BOOT) | (1 << CKEN_TPM); + CKENB |= 1 << (CKEN_HSIO2 & 0x1f); + + /* clear and setup wakeup source */ + AD3SR = ~0; + AD3ER = wakeup_src; + ASCR = ASCR; + ARSR = ARSR; + + PCFR |= (1u << 13); /* L1_DIS */ + PCFR &= ~((1u << 12) | (1u << 1)); /* L0_EN | SL_ROD */ + + PSPR = 0x5c014000; + + /* overwrite with the resume address */ + *p = virt_to_phys(cpu_resume); + + cpu_suspend(0, pxa3xx_finish_suspend); + + *p = saved_data; + + AD3ER = 0; + +#ifndef CONFIG_IWMMXT + asm volatile("mar acc0, %Q0, %R0" : "=r" (acc0)); +#endif +} + +static void pxa3xx_cpu_pm_enter(suspend_state_t state) +{ + /* + * Don't sleep if no wakeup sources are defined + */ + if (wakeup_src == 0) { + printk(KERN_ERR "Not suspending: no wakeup sources\n"); + return; + } + + switch (state) { + case PM_SUSPEND_STANDBY: + pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2); + break; + + case PM_SUSPEND_MEM: + pxa3xx_cpu_pm_suspend(); + break; + } +} + +static int pxa3xx_cpu_pm_valid(suspend_state_t state) +{ + return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY; +} + +static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = { + .valid = pxa3xx_cpu_pm_valid, + .enter = pxa3xx_cpu_pm_enter, +}; + +static void __init pxa3xx_init_pm(void) +{ + sram = ioremap(ISRAM_START, ISRAM_SIZE); + if (!sram) { + printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n"); + return; + } + + /* + * Since we copy wakeup code into the SRAM, we need to ensure + * that it is preserved over the low power modes. Note: bit 8 + * is undocumented in the developer manual, but must be set. + */ + AD1R |= ADXR_L2 | ADXR_R0; + AD2R |= ADXR_L2 | ADXR_R0; + AD3R |= ADXR_L2 | ADXR_R0; + + /* + * Clear the resume enable registers. + */ + AD1D0ER = 0; + AD2D0ER = 0; + AD2D1ER = 0; + AD3ER = 0; + + pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns; +} + +static int pxa3xx_set_wake(struct irq_data *d, unsigned int on) +{ + unsigned long flags, mask = 0; + + switch (d->irq) { + case IRQ_SSP3: + mask = ADXER_MFP_WSSP3; + break; + case IRQ_MSL: + mask = ADXER_WMSL0; + break; + case IRQ_USBH2: + case IRQ_USBH1: + mask = ADXER_WUSBH; + break; + case IRQ_KEYPAD: + mask = ADXER_WKP; + break; + case IRQ_AC97: + mask = ADXER_MFP_WAC97; + break; + case IRQ_USIM: + mask = ADXER_WUSIM0; + break; + case IRQ_SSP2: + mask = ADXER_MFP_WSSP2; + break; + case IRQ_I2C: + mask = ADXER_MFP_WI2C; + break; + case IRQ_STUART: + mask = ADXER_MFP_WUART3; + break; + case IRQ_BTUART: + mask = ADXER_MFP_WUART2; + break; + case IRQ_FFUART: + mask = ADXER_MFP_WUART1; + break; + case IRQ_MMC: + mask = ADXER_MFP_WMMC1; + break; + case IRQ_SSP: + mask = ADXER_MFP_WSSP1; + break; + case IRQ_RTCAlrm: + mask = ADXER_WRTC; + break; + case IRQ_SSP4: + mask = ADXER_MFP_WSSP4; + break; + case IRQ_TSI: + mask = ADXER_WTSI; + break; + case IRQ_USIM2: + mask = ADXER_WUSIM1; + break; + case IRQ_MMC2: + mask = ADXER_MFP_WMMC2; + break; + case IRQ_NAND: + mask = ADXER_MFP_WFLASH; + break; + case IRQ_USB2: + mask = ADXER_WUSB2; + break; + case IRQ_WAKEUP0: + mask = ADXER_WEXTWAKE0; + break; + case IRQ_WAKEUP1: + mask = ADXER_WEXTWAKE1; + break; + case IRQ_MMC3: + mask = ADXER_MFP_GEN12; + break; + default: + return -EINVAL; + } + + local_irq_save(flags); + if (on) + wakeup_src |= mask; + else + wakeup_src &= ~mask; + local_irq_restore(flags); + + return 0; +} +#else +static inline void pxa3xx_init_pm(void) {} +#define pxa3xx_set_wake NULL +#endif + +static void pxa_ack_ext_wakeup(struct irq_data *d) +{ + PECR |= PECR_IS(d->irq - IRQ_WAKEUP0); +} + +static void pxa_mask_ext_wakeup(struct irq_data *d) +{ + pxa_mask_irq(d); + PECR &= ~PECR_IE(d->irq - IRQ_WAKEUP0); +} + +static void pxa_unmask_ext_wakeup(struct irq_data *d) +{ + pxa_unmask_irq(d); + PECR |= PECR_IE(d->irq - IRQ_WAKEUP0); +} + +static int pxa_set_ext_wakeup_type(struct irq_data *d, unsigned int flow_type) +{ + if (flow_type & IRQ_TYPE_EDGE_RISING) + PWER |= 1 << (d->irq - IRQ_WAKEUP0); + + if (flow_type & IRQ_TYPE_EDGE_FALLING) + PWER |= 1 << (d->irq - IRQ_WAKEUP0 + 2); + + return 0; +} + +static struct irq_chip pxa_ext_wakeup_chip = { + .name = "WAKEUP", + .irq_ack = pxa_ack_ext_wakeup, + .irq_mask = pxa_mask_ext_wakeup, + .irq_unmask = pxa_unmask_ext_wakeup, + .irq_set_type = pxa_set_ext_wakeup_type, +}; + +static void __init pxa_init_ext_wakeup_irq(int (*fn)(struct irq_data *, + unsigned int)) +{ + int irq; + + for (irq = IRQ_WAKEUP0; irq <= IRQ_WAKEUP1; irq++) { + irq_set_chip_and_handler(irq, &pxa_ext_wakeup_chip, + handle_edge_irq); + set_irq_flags(irq, IRQF_VALID); + } + + pxa_ext_wakeup_chip.irq_set_wake = fn; +} + +static void __init __pxa3xx_init_irq(void) +{ + /* enable CP6 access */ + u32 value; + __asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value)); + value |= (1 << 6); + __asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value)); + + pxa_init_ext_wakeup_irq(pxa3xx_set_wake); +} + +void __init pxa3xx_init_irq(void) +{ + __pxa3xx_init_irq(); + pxa_init_irq(56, pxa3xx_set_wake); +} + +#ifdef CONFIG_OF +void __init pxa3xx_dt_init_irq(void) +{ + __pxa3xx_init_irq(); + pxa_dt_irq_init(pxa3xx_set_wake); +} +#endif /* CONFIG_OF */ + +static struct map_desc pxa3xx_io_desc[] __initdata = { + { /* Mem Ctl */ + .virtual = (unsigned long)SMEMC_VIRT, + .pfn = __phys_to_pfn(PXA3XX_SMEMC_BASE), + .length = SMEMC_SIZE, + .type = MT_DEVICE + } +}; + +void __init pxa3xx_map_io(void) +{ + pxa_map_io(); + iotable_init(ARRAY_AND_SIZE(pxa3xx_io_desc)); + pxa3xx_get_clk_frequency_khz(1); +} + +/* + * device registration specific to PXA3xx. + */ + +void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info) +{ + pxa_register_device(&pxa3xx_device_i2c_power, info); +} + +static struct pxa_gpio_platform_data pxa3xx_gpio_pdata = { + .irq_base = PXA_GPIO_TO_IRQ(0), +}; + +static struct platform_device *devices[] __initdata = { + &pxa27x_device_udc, + &pxa_device_pmu, + &pxa_device_i2s, + &pxa_device_asoc_ssp1, + &pxa_device_asoc_ssp2, + &pxa_device_asoc_ssp3, + &pxa_device_asoc_ssp4, + &pxa_device_asoc_platform, + &sa1100_device_rtc, + &pxa_device_rtc, + &pxa3xx_device_ssp1, + &pxa3xx_device_ssp2, + &pxa3xx_device_ssp3, + &pxa3xx_device_ssp4, + &pxa27x_device_pwm0, + &pxa27x_device_pwm1, +}; + +static int __init pxa3xx_init(void) +{ + int ret = 0; + + if (cpu_is_pxa3xx()) { + + reset_status = ARSR; + + /* + * clear RDH bit every time after reset + * + * Note: the last 3 bits DxS are write-1-to-clear so carefully + * preserve them here in case they will be referenced later + */ + ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); + + clkdev_add_table(pxa3xx_clkregs, ARRAY_SIZE(pxa3xx_clkregs)); + + if ((ret = pxa_init_dma(IRQ_DMA, 32))) + return ret; + + pxa3xx_init_pm(); + + register_syscore_ops(&pxa_irq_syscore_ops); + register_syscore_ops(&pxa3xx_mfp_syscore_ops); + register_syscore_ops(&pxa3xx_clock_syscore_ops); + + if (of_have_populated_dt()) + return 0; + + ret = platform_add_devices(devices, ARRAY_SIZE(devices)); + if (ret) + return ret; + if (cpu_is_pxa300() || cpu_is_pxa310() || cpu_is_pxa320()) { + platform_device_add_data(&pxa3xx_device_gpio, + &pxa3xx_gpio_pdata, + sizeof(pxa3xx_gpio_pdata)); + ret = platform_device_register(&pxa3xx_device_gpio); + } + } + + return ret; +} + +postcore_initcall(pxa3xx_init); |