diff options
Diffstat (limited to 'arch/arm/mach-pxa/pcm990-baseboard.c')
| -rw-r--r-- | arch/arm/mach-pxa/pcm990-baseboard.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c new file mode 100644 index 000000000000..3dda16a20049 --- /dev/null +++ b/arch/arm/mach-pxa/pcm990-baseboard.c @@ -0,0 +1,330 @@ +/* + * 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 <linux/irq.h> +#include <linux/platform_device.h> +#include <linux/ide.h> +#include <asm/mach/map.h> +#include <asm/arch/pxa-regs.h> +#include <asm/arch/mmc.h> +#include <asm/arch/ohci.h> +#include <asm/arch/pcm990_baseboard.h> + +/* + * 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"); +} |