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2e927b7626
This patch adds baseboard support for the phyCORE-PXA270 development kit (aka PCM-990). This example shows how to use some phyCORE-PXA270 CPU module features on a baseboard in a standard manner. It could be used as a starting point for custom baseboard development. V2: After comments by Eric Miao: - IRQ chained handler fixed - video/graphic support moved to separate patch - ifdef/endif hell reduced ;-) V3: After comments by Russell King - initialise the mmci platform data statically V4: After comments by Russell King - wrong return value in pcm990_mci_init() fixed Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
331 lines
8.7 KiB
C
331 lines
8.7 KiB
C
/*
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* arch/arm/mach-pxa/pcm990-baseboard.c
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* Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
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*
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* Refer
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* http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
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* for additional hardware info
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*
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* Author: Juergen Kilb
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* Created: April 05, 2005
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* Copyright: Phytec Messtechnik GmbH
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* e-Mail: armlinux@phytec.de
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*
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* based on Intel Mainstone Board
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*
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* Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/ide.h>
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#include <asm/mach/map.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/mmc.h>
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#include <asm/arch/ohci.h>
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#include <asm/arch/pcm990_baseboard.h>
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/*
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* The PCM-990 development baseboard uses PCM-027's hardeware in the
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* following way:
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*
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* - LCD support is in use
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* - GPIO16 is output for back light on/off with PWM
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* - GPIO58 ... GPIO73 are outputs for display data
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* - GPIO74 is output output for LCDFCLK
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* - GPIO75 is output for LCDLCLK
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* - GPIO76 is output for LCDPCLK
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* - GPIO77 is output for LCDBIAS
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* - MMC support is in use
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* - GPIO32 is output for MMCCLK
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* - GPIO92 is MMDAT0
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* - GPIO109 is MMDAT1
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* - GPIO110 is MMCS0
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* - GPIO111 is MMCS1
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* - GPIO112 is MMCMD
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* - IDE/CF card is in use
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* - GPIO48 is output /POE
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* - GPIO49 is output /PWE
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* - GPIO50 is output /PIOR
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* - GPIO51 is output /PIOW
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* - GPIO54 is output /PCE2
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* - GPIO55 is output /PREG
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* - GPIO56 is input /PWAIT
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* - GPIO57 is output /PIOS16
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* - GPIO79 is output PSKTSEL
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* - GPIO85 is output /PCE1
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* - FFUART is in use
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* - GPIO34 is input FFRXD
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* - GPIO35 is input FFCTS
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* - GPIO36 is input FFDCD
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* - GPIO37 is input FFDSR
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* - GPIO38 is input FFRI
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* - GPIO39 is output FFTXD
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* - GPIO40 is output FFDTR
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* - GPIO41 is output FFRTS
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* - BTUART is in use
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* - GPIO42 is input BTRXD
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* - GPIO43 is output BTTXD
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* - GPIO44 is input BTCTS
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* - GPIO45 is output BTRTS
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* - IRUART is in use
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* - GPIO46 is input STDRXD
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* - GPIO47 is output STDTXD
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* - AC97 is in use*)
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* - GPIO28 is input AC97CLK
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* - GPIO29 is input AC97DatIn
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* - GPIO30 is output AC97DatO
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* - GPIO31 is output AC97SYNC
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* - GPIO113 is output AC97_RESET
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* - SSP is in use
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* - GPIO23 is output SSPSCLK
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* - GPIO24 is output chip select to Max7301
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* - GPIO25 is output SSPTXD
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* - GPIO26 is input SSPRXD
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* - GPIO27 is input for Max7301 IRQ
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* - GPIO53 is input SSPSYSCLK
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* - SSP3 is in use
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* - GPIO81 is output SSPTXD3
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* - GPIO82 is input SSPRXD3
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* - GPIO83 is output SSPSFRM
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* - GPIO84 is output SSPCLK3
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*
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* Otherwise claimed GPIOs:
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* GPIO1 -> IRQ from user switch
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* GPIO9 -> IRQ from power management
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* GPIO10 -> IRQ from WML9712 AC97 controller
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* GPIO11 -> IRQ from IDE controller
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* GPIO12 -> IRQ from CF controller
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* GPIO13 -> IRQ from CF controller
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* GPIO14 -> GPIO free
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* GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
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* GPIO19 -> GPIO free
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* GPIO20 -> /SDCS2
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* GPIO21 -> /CS3 PC card socket select
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* GPIO33 -> /CS5 network controller select
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* GPIO78 -> /CS2 (16 bit wide data path)
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* GPIO80 -> /CS4 (16 bit wide data path)
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* GPIO86 -> GPIO free
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* GPIO87 -> GPIO free
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* GPIO90 -> LED0 on CPU module
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* GPIO91 -> LED1 on CPI module
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* GPIO117 -> SCL
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* GPIO118 -> SDA
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*/
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static unsigned long pcm990_irq_enabled;
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static void pcm990_mask_ack_irq(unsigned int irq)
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{
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int pcm990_irq = (irq - PCM027_IRQ(0));
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PCM990_INTMSKENA = (pcm990_irq_enabled &= ~(1 << pcm990_irq));
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}
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static void pcm990_unmask_irq(unsigned int irq)
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{
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int pcm990_irq = (irq - PCM027_IRQ(0));
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/* the irq can be acknowledged only if deasserted, so it's done here */
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PCM990_INTSETCLR |= 1 << pcm990_irq;
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PCM990_INTMSKENA = (pcm990_irq_enabled |= (1 << pcm990_irq));
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}
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static struct irq_chip pcm990_irq_chip = {
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.mask_ack = pcm990_mask_ack_irq,
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.unmask = pcm990_unmask_irq,
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};
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static void pcm990_irq_handler(unsigned int irq, struct irq_desc *desc)
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{
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unsigned long pending = (~PCM990_INTSETCLR) & pcm990_irq_enabled;
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do {
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GEDR(PCM990_CTRL_INT_IRQ_GPIO) =
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GPIO_bit(PCM990_CTRL_INT_IRQ_GPIO);
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if (likely(pending)) {
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irq = PCM027_IRQ(0) + __ffs(pending);
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desc = irq_desc + irq;
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desc_handle_irq(irq, desc);
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}
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pending = (~PCM990_INTSETCLR) & pcm990_irq_enabled;
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} while (pending);
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}
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static void __init pcm990_init_irq(void)
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{
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int irq;
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/* setup extra PCM990 irqs */
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for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
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set_irq_chip(irq, &pcm990_irq_chip);
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set_irq_handler(irq, handle_level_irq);
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set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
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}
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PCM990_INTMSKENA = 0x00; /* disable all Interrupts */
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PCM990_INTSETCLR = 0xFF;
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set_irq_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
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set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
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}
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static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
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void *data)
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{
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int err;
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/*
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* enable GPIO for PXA27x MMC controller
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*/
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pxa_gpio_mode(GPIO32_MMCCLK_MD);
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pxa_gpio_mode(GPIO112_MMCCMD_MD);
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pxa_gpio_mode(GPIO92_MMCDAT0_MD);
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pxa_gpio_mode(GPIO109_MMCDAT1_MD);
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pxa_gpio_mode(GPIO110_MMCDAT2_MD);
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pxa_gpio_mode(GPIO111_MMCDAT3_MD);
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err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, IRQF_DISABLED,
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"MMC card detect", data);
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if (err)
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printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
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"card detect IRQ\n");
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return err;
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}
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static void pcm990_mci_setpower(struct device *dev, unsigned int vdd)
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{
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struct pxamci_platform_data *p_d = dev->platform_data;
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if ((1 << vdd) & p_d->ocr_mask)
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__PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG5) =
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PCM990_CTRL_MMC2PWR;
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else
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__PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG5) =
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~PCM990_CTRL_MMC2PWR;
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}
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static void pcm990_mci_exit(struct device *dev, void *data)
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{
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free_irq(PCM027_MMCDET_IRQ, data);
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}
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#define MSECS_PER_JIFFY (1000/HZ)
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static struct pxamci_platform_data pcm990_mci_platform_data = {
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.detect_delay = 250 / MSECS_PER_JIFFY,
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.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
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.init = pcm990_mci_init,
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.setpower = pcm990_mci_setpower,
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.exit = pcm990_mci_exit,
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};
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/*
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* init OHCI hardware to work with
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*
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* Note: Only USB port 1 (host only) is connected
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*
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* GPIO88 (USBHPWR#1): overcurrent in, overcurrent when low
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* GPIO89 (USBHPEN#1): power-on out, on when low
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*/
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static int pcm990_ohci_init(struct device *dev)
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{
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pxa_gpio_mode(PCM990_USB_OVERCURRENT);
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pxa_gpio_mode(PCM990_USB_PWR_EN);
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/*
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* disable USB port 2 and 3
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* power sense is active low
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*/
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UHCHR = ((UHCHR) | UHCHR_PCPL | UHCHR_PSPL | UHCHR_SSEP2 |
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UHCHR_SSEP3) & ~(UHCHR_SSEP1 | UHCHR_SSE);
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/*
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* wait 10ms after Power on
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* overcurrent per port
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* power switch per port
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*/
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UHCRHDA = (5<<24) | (1<<11) | (1<<8); /* FIXME: Required? */
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return 0;
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}
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static struct pxaohci_platform_data pcm990_ohci_platform_data = {
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.port_mode = PMM_PERPORT_MODE,
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.init = pcm990_ohci_init,
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.exit = NULL,
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};
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/*
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* AC97 support
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* Note: The connected AC97 mixer also reports interrupts at PCM990_AC97_IRQ
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*/
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static struct resource pxa27x_ac97_resources[] = {
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[0] = {
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.start = 0x40500000,
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.end = 0x40500000 + 0xfff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = IRQ_AC97,
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.end = IRQ_AC97,
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 pxa_ac97_dmamask = 0xffffffffUL;
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static struct platform_device pxa27x_device_ac97 = {
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.name = "pxa2xx-ac97",
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.id = -1,
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.dev = {
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.dma_mask = &pxa_ac97_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(pxa27x_ac97_resources),
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.resource = pxa27x_ac97_resources,
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};
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/*
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* enable generic access to the base board control CPLDs U6 and U7
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*/
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static struct map_desc pcm990_io_desc[] __initdata = {
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{
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.virtual = PCM990_CTRL_BASE,
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.pfn = __phys_to_pfn(PCM990_CTRL_PHYS),
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.length = PCM990_CTRL_SIZE,
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.type = MT_DEVICE /* CPLD */
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}, {
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.virtual = PCM990_CF_PLD_BASE,
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.pfn = __phys_to_pfn(PCM990_CF_PLD_PHYS),
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.length = PCM990_CF_PLD_SIZE,
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.type = MT_DEVICE /* CPLD */
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}
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};
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/*
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* system init for baseboard usage. Will be called by pcm027 init.
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*
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* Add platform devices present on this baseboard and init
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* them from CPU side as far as required to use them later on
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*/
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void __init pcm990_baseboard_init(void)
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{
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/* register CPLD access */
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iotable_init(pcm990_io_desc, ARRAY_SIZE(pcm990_io_desc));
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/* register CPLD's IRQ controller */
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pcm990_init_irq();
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platform_device_register(&pxa27x_device_ac97);
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/* MMC */
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pxa_set_mci_info(&pcm990_mci_platform_data);
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/* USB host */
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pxa_set_ohci_info(&pcm990_ohci_platform_data);
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printk(KERN_INFO"PCM-990 Evaluation baseboard initialized\n");
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}
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