[ARM] 4747/1: pcm027: support for pcm990 baseboard for phyCORE-PXA270
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>
diff --git a/arch/arm/mach-pxa/pcm990-baseboard.c b/arch/arm/mach-pxa/pcm990-baseboard.c
new file mode 100644
index 0000000..3dda16a
--- /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");
+}