/* * arch/arm/mach-pxa/pcm990-baseboard.c * Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990). * * Refer * http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html * for additional hardware info * * Author: Juergen Kilb * Created: April 05, 2005 * Copyright: Phytec Messtechnik GmbH * e-Mail: armlinux@phytec.de * * based on Intel Mainstone Board * * Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de) * * 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 #include #include #include #include #include #include #include #include /* * The PCM-990 development baseboard uses PCM-027's hardeware in the * following way: * * - LCD support is in use * - GPIO16 is output for back light on/off with PWM * - GPIO58 ... GPIO73 are outputs for display data * - GPIO74 is output output for LCDFCLK * - GPIO75 is output for LCDLCLK * - GPIO76 is output for LCDPCLK * - GPIO77 is output for LCDBIAS * - MMC support is in use * - GPIO32 is output for MMCCLK * - GPIO92 is MMDAT0 * - GPIO109 is MMDAT1 * - GPIO110 is MMCS0 * - GPIO111 is MMCS1 * - GPIO112 is MMCMD * - IDE/CF card is in use * - GPIO48 is output /POE * - GPIO49 is output /PWE * - GPIO50 is output /PIOR * - GPIO51 is output /PIOW * - GPIO54 is output /PCE2 * - GPIO55 is output /PREG * - GPIO56 is input /PWAIT * - GPIO57 is output /PIOS16 * - GPIO79 is output PSKTSEL * - GPIO85 is output /PCE1 * - FFUART is in use * - GPIO34 is input FFRXD * - GPIO35 is input FFCTS * - GPIO36 is input FFDCD * - GPIO37 is input FFDSR * - GPIO38 is input FFRI * - GPIO39 is output FFTXD * - GPIO40 is output FFDTR * - GPIO41 is output FFRTS * - BTUART is in use * - GPIO42 is input BTRXD * - GPIO43 is output BTTXD * - GPIO44 is input BTCTS * - GPIO45 is output BTRTS * - IRUART is in use * - GPIO46 is input STDRXD * - GPIO47 is output STDTXD * - AC97 is in use*) * - GPIO28 is input AC97CLK * - GPIO29 is input AC97DatIn * - GPIO30 is output AC97DatO * - GPIO31 is output AC97SYNC * - GPIO113 is output AC97_RESET * - SSP is in use * - GPIO23 is output SSPSCLK * - GPIO24 is output chip select to Max7301 * - GPIO25 is output SSPTXD * - GPIO26 is input SSPRXD * - GPIO27 is input for Max7301 IRQ * - GPIO53 is input SSPSYSCLK * - SSP3 is in use * - GPIO81 is output SSPTXD3 * - GPIO82 is input SSPRXD3 * - GPIO83 is output SSPSFRM * - GPIO84 is output SSPCLK3 * * Otherwise claimed GPIOs: * GPIO1 -> IRQ from user switch * GPIO9 -> IRQ from power management * GPIO10 -> IRQ from WML9712 AC97 controller * GPIO11 -> IRQ from IDE controller * GPIO12 -> IRQ from CF controller * GPIO13 -> IRQ from CF controller * GPIO14 -> GPIO free * GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path) * GPIO19 -> GPIO free * GPIO20 -> /SDCS2 * GPIO21 -> /CS3 PC card socket select * GPIO33 -> /CS5 network controller select * GPIO78 -> /CS2 (16 bit wide data path) * GPIO80 -> /CS4 (16 bit wide data path) * GPIO86 -> GPIO free * GPIO87 -> GPIO free * GPIO90 -> LED0 on CPU module * GPIO91 -> LED1 on CPI module * GPIO117 -> SCL * GPIO118 -> SDA */ static unsigned long pcm990_irq_enabled; static void pcm990_mask_ack_irq(unsigned int irq) { int pcm990_irq = (irq - PCM027_IRQ(0)); PCM990_INTMSKENA = (pcm990_irq_enabled &= ~(1 << pcm990_irq)); } static void pcm990_unmask_irq(unsigned int irq) { int pcm990_irq = (irq - PCM027_IRQ(0)); /* the irq can be acknowledged only if deasserted, so it's done here */ PCM990_INTSETCLR |= 1 << pcm990_irq; PCM990_INTMSKENA = (pcm990_irq_enabled |= (1 << pcm990_irq)); } static struct irq_chip pcm990_irq_chip = { .mask_ack = pcm990_mask_ack_irq, .unmask = pcm990_unmask_irq, }; static void pcm990_irq_handler(unsigned int irq, struct irq_desc *desc) { unsigned long pending = (~PCM990_INTSETCLR) & pcm990_irq_enabled; do { GEDR(PCM990_CTRL_INT_IRQ_GPIO) = GPIO_bit(PCM990_CTRL_INT_IRQ_GPIO); if (likely(pending)) { irq = PCM027_IRQ(0) + __ffs(pending); desc = irq_desc + irq; desc_handle_irq(irq, desc); } pending = (~PCM990_INTSETCLR) & pcm990_irq_enabled; } while (pending); } static void __init pcm990_init_irq(void) { int irq; /* setup extra PCM990 irqs */ for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) { set_irq_chip(irq, &pcm990_irq_chip); set_irq_handler(irq, handle_level_irq); set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); } PCM990_INTMSKENA = 0x00; /* disable all Interrupts */ PCM990_INTSETCLR = 0xFF; set_irq_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler); set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE); } static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int, void *data) { int err; /* * enable GPIO for PXA27x MMC controller */ pxa_gpio_mode(GPIO32_MMCCLK_MD); pxa_gpio_mode(GPIO112_MMCCMD_MD); pxa_gpio_mode(GPIO92_MMCDAT0_MD); pxa_gpio_mode(GPIO109_MMCDAT1_MD); pxa_gpio_mode(GPIO110_MMCDAT2_MD); pxa_gpio_mode(GPIO111_MMCDAT3_MD); err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, IRQF_DISABLED, "MMC card detect", data); if (err) printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC " "card detect IRQ\n"); return err; } static void pcm990_mci_setpower(struct device *dev, unsigned int vdd) { struct pxamci_platform_data *p_d = dev->platform_data; if ((1 << vdd) & p_d->ocr_mask) __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG5) = PCM990_CTRL_MMC2PWR; else __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG5) = ~PCM990_CTRL_MMC2PWR; } static void pcm990_mci_exit(struct device *dev, void *data) { free_irq(PCM027_MMCDET_IRQ, data); } #define MSECS_PER_JIFFY (1000/HZ) static struct pxamci_platform_data pcm990_mci_platform_data = { .detect_delay = 250 / MSECS_PER_JIFFY, .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, .init = pcm990_mci_init, .setpower = pcm990_mci_setpower, .exit = pcm990_mci_exit, }; /* * init OHCI hardware to work with * * Note: Only USB port 1 (host only) is connected * * GPIO88 (USBHPWR#1): overcurrent in, overcurrent when low * GPIO89 (USBHPEN#1): power-on out, on when low */ static int pcm990_ohci_init(struct device *dev) { pxa_gpio_mode(PCM990_USB_OVERCURRENT); pxa_gpio_mode(PCM990_USB_PWR_EN); /* * disable USB port 2 and 3 * power sense is active low */ UHCHR = ((UHCHR) | UHCHR_PCPL | UHCHR_PSPL | UHCHR_SSEP2 | UHCHR_SSEP3) & ~(UHCHR_SSEP1 | UHCHR_SSE); /* * wait 10ms after Power on * overcurrent per port * power switch per port */ UHCRHDA = (5<<24) | (1<<11) | (1<<8); /* FIXME: Required? */ return 0; } static struct pxaohci_platform_data pcm990_ohci_platform_data = { .port_mode = PMM_PERPORT_MODE, .init = pcm990_ohci_init, .exit = NULL, }; /* * AC97 support * Note: The connected AC97 mixer also reports interrupts at PCM990_AC97_IRQ */ static struct resource pxa27x_ac97_resources[] = { [0] = { .start = 0x40500000, .end = 0x40500000 + 0xfff, .flags = IORESOURCE_MEM, }, [1] = { .start = IRQ_AC97, .end = IRQ_AC97, .flags = IORESOURCE_IRQ, }, }; static u64 pxa_ac97_dmamask = 0xffffffffUL; static struct platform_device pxa27x_device_ac97 = { .name = "pxa2xx-ac97", .id = -1, .dev = { .dma_mask = &pxa_ac97_dmamask, .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(pxa27x_ac97_resources), .resource = pxa27x_ac97_resources, }; /* * enable generic access to the base board control CPLDs U6 and U7 */ static struct map_desc pcm990_io_desc[] __initdata = { { .virtual = PCM990_CTRL_BASE, .pfn = __phys_to_pfn(PCM990_CTRL_PHYS), .length = PCM990_CTRL_SIZE, .type = MT_DEVICE /* CPLD */ }, { .virtual = PCM990_CF_PLD_BASE, .pfn = __phys_to_pfn(PCM990_CF_PLD_PHYS), .length = PCM990_CF_PLD_SIZE, .type = MT_DEVICE /* CPLD */ } }; /* * system init for baseboard usage. Will be called by pcm027 init. * * Add platform devices present on this baseboard and init * them from CPU side as far as required to use them later on */ void __init pcm990_baseboard_init(void) { /* register CPLD access */ iotable_init(pcm990_io_desc, ARRAY_SIZE(pcm990_io_desc)); /* register CPLD's IRQ controller */ pcm990_init_irq(); platform_device_register(&pxa27x_device_ac97); /* MMC */ pxa_set_mci_info(&pcm990_mci_platform_data); /* USB host */ pxa_set_ohci_info(&pcm990_ohci_platform_data); printk(KERN_INFO"PCM-990 Evaluation baseboard initialized\n"); }