[ARM] 4576/1: CM-X270 machine support

This patch provides core support for CM-X270 platform.
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/Kconfig

@@ -63,6 +63,11 @@ config MACH_ZYLONITE
 	bool "PXA3xx Development Platform"
 	select PXA3xx
 
+config MACH_ARMCORE
+	bool "CompuLab CM-X270 modules"
+	select PXA27x
+	select IWMMXT
+
 endchoice
 
 if PXA_SHARPSL

arch/arm/mach-pxa/Makefile

@@ -29,6 +29,8 @@ ifeq ($(CONFIG_MACH_ZYLONITE),y)
   obj-$(CONFIG_CPU_PXA320)	+= zylonite_pxa320.o
 endif
 
+obj-$(CONFIG_MACH_ARMCORE)      += cm-x270.o
+
 # Support for blinky lights
 led-y := leds.o
 led-$(CONFIG_ARCH_LUBBOCK)	+= leds-lubbock.o
@@ -45,3 +47,7 @@ obj-$(CONFIG_PXA_SSP)		+= ssp.o
 ifeq ($(CONFIG_PXA27x),y)
 obj-$(CONFIG_PM)		+= standby.o
 endif
+
+ifeq ($(CONFIG_PCI),y)
+obj-$(CONFIG_MACH_ARMCORE) += cm-x270-pci.o
+endif

arch/arm/mach-pxa/cm-x270-pci.c

+/*
+ * linux/arch/arm/mach-pxa/cm-x270-pci.c
+ *
+ * PCI bios-type initialisation for PCI machines
+ *
+ * Bits taken from various places.
+ *
+ * Copyright (C) 2007 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * 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/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+
+#include <asm/mach/pci.h>
+#include <asm/arch/cm-x270.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/mach-types.h>
+
+#include <asm/hardware/it8152.h>
+
+unsigned long it8152_base_address = CMX270_IT8152_VIRT;
+
+/*
+ * Only first 64MB of memory can be accessed via PCI.
+ * We use GFP_DMA to allocate safe buffers to do map/unmap.
+ * This is really ugly and we need a better way of specifying
+ * DMA-capable regions of memory.
+ */
+void __init cmx270_pci_adjust_zones(int node, unsigned long *zone_size,
+	unsigned long *zhole_size)
+{
+	unsigned int sz = SZ_64M >> PAGE_SHIFT;
+
+	printk(KERN_INFO "Adjusting zones for CM-x270\n");
+
+	/*
+	 * Only adjust if > 64M on current system
+	 */
+	if (node || (zone_size[0] <= sz))
+		return;
+
+	zone_size[1] = zone_size[0] - sz;
+	zone_size[0] = sz;
+	zhole_size[1] = zhole_size[0];
+	zhole_size[0] = 0;
+}
+
+static void cmx270_it8152_irq_demux(unsigned int irq, struct irq_desc *desc)
+{
+	/* clear our parent irq */
+	GEDR(GPIO_IT8152_IRQ) = GPIO_bit(GPIO_IT8152_IRQ);
+
+	it8152_irq_demux(irq, desc);
+}
+
+void __cmx270_pci_init_irq(void)
+{
+	it8152_init_irq();
+	pxa_gpio_mode(IRQ_TO_GPIO(GPIO_IT8152_IRQ));
+	set_irq_type(IRQ_GPIO(GPIO_IT8152_IRQ), IRQT_RISING);
+
+	set_irq_chained_handler(IRQ_GPIO(GPIO_IT8152_IRQ),
+				cmx270_it8152_irq_demux);
+}
+
+#ifdef CONFIG_PM
+static unsigned long sleep_save_ite[10];
+
+void __cmx270_pci_suspend(void)
+{
+	/* save ITE state */
+	sleep_save_ite[0] = __raw_readl(IT8152_INTC_PDCNIMR);
+	sleep_save_ite[1] = __raw_readl(IT8152_INTC_LPCNIMR);
+	sleep_save_ite[2] = __raw_readl(IT8152_INTC_LPNIAR);
+
+	/* Clear ITE IRQ's */
+	__raw_writel((0), IT8152_INTC_PDCNIRR);
+	__raw_writel((0), IT8152_INTC_LPCNIRR);
+}
+
+void __cmx270_pci_resume(void)
+{
+	/* restore IT8152 state */
+	__raw_writel((sleep_save_ite[0]), IT8152_INTC_PDCNIMR);
+	__raw_writel((sleep_save_ite[1]), IT8152_INTC_LPCNIMR);
+	__raw_writel((sleep_save_ite[2]), IT8152_INTC_LPNIAR);
+}
+#else
+void cmx270_pci_suspend(void) {}
+void cmx270_pci_resume(void) {}
+#endif
+
+/* PCI IRQ mapping*/
+static int __init cmx270_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	int irq;
+
+	printk(KERN_DEBUG "===> %s: %s slot=%x, pin=%x\n", __FUNCTION__,
+	       pci_name(dev), slot, pin);
+
+	irq = it8152_pci_map_irq(dev, slot, pin);
+	if (irq)
+		return irq;
+
+	/*
+	  Here comes the ugly part. The routing is baseboard specific,
+	  but defining a platform for each possible base of CM-x270 is
+	  unrealistic. Here we keep mapping for ATXBase and SB-x270.
+	*/
+	/* ATXBASE PCI slot */
+	if (slot == 7)
+		return IT8152_PCI_INTA;
+
+	/* ATXBase/SB-x270 CardBus */
+	if (slot == 8 || slot == 0)
+		return IT8152_PCI_INTB;
+
+	/* ATXBase Ethernet */
+	if (slot == 9)
+		return IT8152_PCI_INTA;
+
+	/* SB-x270 Ethernet */
+	if (slot == 16)
+		return IT8152_PCI_INTA;
+
+	/* PC104+ interrupt routing */
+	if ((slot == 17) || (slot == 19))
+		return IT8152_PCI_INTA;
+	if ((slot == 18) || (slot == 20))
+		return IT8152_PCI_INTB;
+
+	return(0);
+}
+
+static struct pci_bus * __init
+cmx270_pci_scan_bus(int nr, struct pci_sys_data *sys)
+{
+	printk(KERN_INFO "Initializing CM-X270 PCI subsystem\n");
+
+	__raw_writel(0x800, IT8152_PCI_CFG_ADDR);
+	if (__raw_readl(IT8152_PCI_CFG_DATA) == 0x81521283) {
+		printk(KERN_INFO "PCI Bridge found.\n");
+
+		/* set PCI I/O base at 0 */
+		writel(0x848, IT8152_PCI_CFG_ADDR);
+		writel(0, IT8152_PCI_CFG_DATA);
+
+		/* set PCI memory base at 0 */
+		writel(0x840, IT8152_PCI_CFG_ADDR);
+		writel(0, IT8152_PCI_CFG_DATA);
+
+		writel(0x20, IT8152_GPIO_GPDR);
+
+		/* CardBus Controller on ATXbase baseboard */
+		writel(0x4000, IT8152_PCI_CFG_ADDR);
+		if (readl(IT8152_PCI_CFG_DATA) == 0xAC51104C) {
+			printk(KERN_INFO "CardBus Bridge found.\n");
+
+			/* Configure socket 0 */
+			writel(0x408C, IT8152_PCI_CFG_ADDR);
+			writel(0x1022, IT8152_PCI_CFG_DATA);
+
+			writel(0x4080, IT8152_PCI_CFG_ADDR);
+			writel(0x3844d060, IT8152_PCI_CFG_DATA);
+
+			writel(0x4090, IT8152_PCI_CFG_ADDR);
+			writel(((readl(IT8152_PCI_CFG_DATA) & 0xffff) |
+				0x60440000),
+			       IT8152_PCI_CFG_DATA);
+
+			writel(0x4018, IT8152_PCI_CFG_ADDR);
+			writel(0xb0000000, IT8152_PCI_CFG_DATA);
+
+			/* Configure socket 1 */
+			writel(0x418C, IT8152_PCI_CFG_ADDR);
+			writel(0x1022, IT8152_PCI_CFG_DATA);
+
+			writel(0x4180, IT8152_PCI_CFG_ADDR);
+			writel(0x3844d060, IT8152_PCI_CFG_DATA);
+
+			writel(0x4190, IT8152_PCI_CFG_ADDR);
+			writel(((readl(IT8152_PCI_CFG_DATA) & 0xffff) |
+				0x60440000),
+			       IT8152_PCI_CFG_DATA);
+
+			writel(0x4118, IT8152_PCI_CFG_ADDR);
+			writel(0xb0000000, IT8152_PCI_CFG_DATA);
+		}
+	}
+	return it8152_pci_scan_bus(nr, sys);
+}
+
+static struct hw_pci cmx270_pci __initdata = {
+	.swizzle	= pci_std_swizzle,
+	.map_irq	= cmx270_pci_map_irq,
+	.nr_controllers	= 1,
+	.setup		= it8152_pci_setup,
+	.scan		= cmx270_pci_scan_bus,
+};
+
+static int __init cmx270_init_pci(void)
+{
+	if (machine_is_armcore())
+		pci_common_init(&cmx270_pci);
+
+	return 0;
+}
+
+subsys_initcall(cmx270_init_pci);

arch/arm/mach-pxa/cm-x270-pci.h

+extern void __cmx270_pci_init_irq(void);
+extern void __cmx270_pci_suspend(void);
+extern void __cmx270_pci_resume(void);
+
+#ifdef CONFIG_PCI
+#define cmx270_pci_init_irq __cmx270_pci_init_irq
+#define cmx270_pci_suspend __cmx270_pci_suspend
+#define cmx270_pci_resume __cmx270_pci_resume
+#else
+#define cmx270_pci_init_irq() do {} while (0)
+#define cmx270_pci_suspend() do {} while (0)
+#define cmx270_pci_resume() do {} while (0)
+#endif

drivers/leds/Kconfig

@@ -108,6 +108,12 @@ config LEDS_GPIO
 	  outputs. To be useful the particular board must have LEDs
 	  and they must be connected to the GPIO lines.
 
+config LEDS_CM_X270
+	tristate "LED Support for the CM-X270 LEDs"
+	depends on LEDS_CLASS && MACH_ARMCORE
+	help
+	  This option enables support for the CM-X270 LEDs.
+
 comment "LED Triggers"
 
 config LEDS_TRIGGERS

drivers/leds/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_LEDS_H1940)		+= leds-h1940.o
 obj-$(CONFIG_LEDS_COBALT_QUBE)		+= leds-cobalt-qube.o
 obj-$(CONFIG_LEDS_COBALT_RAQ)		+= leds-cobalt-raq.o
 obj-$(CONFIG_LEDS_GPIO)			+= leds-gpio.o
+obj-$(CONFIG_LEDS_CM_X270)              += leds-cm-x270.o
 
 # LED Triggers
 obj-$(CONFIG_LEDS_TRIGGER_TIMER)	+= ledtrig-timer.o

drivers/leds/leds-cm-x270.c

+/*
+ * drivers/leds/leds-cm-x270.c
+ *
+ * Copyright 2007 CompuLab Ltd.
+ * Author: Mike Rapoport <mike@compulab.co.il>
+ *
+ * Based on leds-corgi.c
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/pxa-regs.h>
+
+#define GPIO_RED_LED			(93)
+#define GPIO_GREEN_LED			(94)
+
+static void cmx270_red_set(struct led_classdev *led_cdev,
+			   enum led_brightness value)
+{
+	if (value)
+		GPCR(GPIO_RED_LED) = GPIO_bit(GPIO_RED_LED);
+	else
+		GPSR(GPIO_RED_LED) = GPIO_bit(GPIO_RED_LED);
+}
+
+static void cmx270_green_set(struct led_classdev *led_cdev,
+			     enum led_brightness value)
+{
+	if (value)
+		GPCR(GPIO_GREEN_LED) = GPIO_bit(GPIO_GREEN_LED);
+	else
+		GPSR(GPIO_GREEN_LED) = GPIO_bit(GPIO_GREEN_LED);
+}
+
+static struct led_classdev cmx270_red_led = {
+	.name			= "cm-x270:red",
+	.default_trigger	= "nand-disk",
+	.brightness_set		= cmx270_red_set,
+};
+
+static struct led_classdev cmx270_green_led = {
+	.name			= "cm-x270:green",
+	.default_trigger	= "heartbeat",
+	.brightness_set		= cmx270_green_set,
+};
+
+#ifdef CONFIG_PM
+static int cmx270led_suspend(struct platform_device *dev, pm_message_t state)
+{
+	led_classdev_suspend(&cmx270_red_led);
+	led_classdev_suspend(&cmx270_green_led);
+	return 0;
+}
+
+static int cmx270led_resume(struct platform_device *dev)
+{
+	led_classdev_resume(&cmx270_red_led);
+	led_classdev_resume(&cmx270_green_led);
+	return 0;
+}
+#endif
+
+static int cmx270led_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = led_classdev_register(&pdev->dev, &cmx270_red_led);
+	if (ret < 0)
+		return ret;
+
+	ret = led_classdev_register(&pdev->dev, &cmx270_green_led);
+	if (ret < 0)
+		led_classdev_unregister(&cmx270_red_led);
+
+	return ret;
+}
+
+static int cmx270led_remove(struct platform_device *pdev)
+{
+	led_classdev_unregister(&cmx270_red_led);
+	led_classdev_unregister(&cmx270_green_led);
+	return 0;
+}
+
+static struct platform_driver cmx270led_driver = {
+	.probe		= cmx270led_probe,
+	.remove		= cmx270led_remove,
+#ifdef CONFIG_PM
+	.suspend	= cmx270led_suspend,
+	.resume		= cmx270led_resume,
+#endif
+	.driver		= {
+		.name		= "cm-x270-led",
+	},
+};
+
+static int __init cmx270led_init(void)
+{
+	return platform_driver_register(&cmx270led_driver);
+}
+
+static void __exit cmx270led_exit(void)
+{
+	platform_driver_unregister(&cmx270led_driver);
+}
+
+module_init(cmx270led_init);
+module_exit(cmx270led_exit);
+
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_DESCRIPTION("CM-x270 LED driver");
+MODULE_LICENSE("GPL");

include/asm-arm/arch-pxa/cm-x270.h

+/*
+ * linux/include/asm/arch-pxa/cm-x270.h
+ *
+ * Copyright Compulab Ltd., 2003, 2007
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * 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.
+ */
+
+
+/* CM-x270 device physical addresses */
+#define CMX270_CS1_PHYS		(PXA_CS1_PHYS)
+#define MARATHON_PHYS		(PXA_CS2_PHYS)
+#define CMX270_IDE104_PHYS	(PXA_CS3_PHYS)
+#define CMX270_IT8152_PHYS	(PXA_CS4_PHYS)
+
+/* Statically mapped regions */
+#define CMX270_VIRT_BASE		(0xe8000000)
+#define CMX270_IT8152_VIRT		(CMX270_VIRT_BASE)
+#define CMX270_IDE104_VIRT		(CMX270_IT8152_VIRT + SZ_64M)
+
+/* GPIO related definitions */
+#define GPIO_IT8152_IRQ			(22)
+
+#define IRQ_GPIO_IT8152_IRQ	IRQ_GPIO(GPIO_IT8152_IRQ)
+#define PME_IRQ			IRQ_GPIO(0)
+#define CMX270_IDE_IRQ		IRQ_GPIO(100)
+#define CMX270_GPIRQ1		IRQ_GPIO(101)
+#define CMX270_TOUCHIRQ		IRQ_GPIO(96)
+#define CMX270_ETHIRQ		IRQ_GPIO(10)
+#define CMX270_GFXIRQ		IRQ_GPIO(95)
+#define CMX270_NANDIRQ		IRQ_GPIO(89)
+#define CMX270_MMC_IRQ		IRQ_GPIO(83)
+
+/* PCMCIA related definitions */
+#define PCC_DETECT(x)	(GPLR(84 - (x)) & GPIO_bit(84 - (x)))
+#define PCC_READY(x)	(GPLR(82 - (x)) & GPIO_bit(82 - (x)))
+
+#define PCMCIA_S0_CD_VALID		IRQ_GPIO(84)
+#define PCMCIA_S0_CD_VALID_EDGE		GPIO_BOTH_EDGES
+
+#define PCMCIA_S1_CD_VALID		IRQ_GPIO(83)
+#define PCMCIA_S1_CD_VALID_EDGE		GPIO_BOTH_EDGES
+
+#define PCMCIA_S0_RDYINT		IRQ_GPIO(82)
+#define PCMCIA_S1_RDYINT		IRQ_GPIO(81)
+
+#define PCMCIA_RESET_GPIO		53

include/asm-arm/arch-pxa/dma.h

@@ -30,6 +30,10 @@ typedef enum {
 	DMA_PRIO_LOW = 2
 } pxa_dma_prio;
 
+#if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
+#define HAVE_ARCH_PCI_SET_DMA_MASK	1
+#endif
+
 /*
  * DMA registration
  */

include/asm-arm/arch-pxa/hardware.h

@@ -215,4 +215,10 @@ extern unsigned int get_memclk_frequency_10khz(void);
 
 #endif
 
+#if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
+#define PCIBIOS_MIN_IO		0
+#define PCIBIOS_MIN_MEM		0
+#define pcibios_assign_all_busses()	1
+#endif
+
 #endif  /* _ASM_ARCH_HARDWARE_H */

include/asm-arm/arch-pxa/irqs.h

@@ -210,3 +210,24 @@
 #define IRQ_LOCOMO_GPIO_BASE	(IRQ_BOARD_START + 1)
 #define IRQ_LOCOMO_LT_BASE	(IRQ_BOARD_START + 2)
 #define IRQ_LOCOMO_SPI_BASE	(IRQ_BOARD_START + 3)
+
+/* ITE8152 irqs */
+/* add IT8152 IRQs beyond BOARD_END */
+#ifdef CONFIG_PCI_HOST_ITE8152
+#define IT8152_IRQ(x)   (IRQ_GPIO(IRQ_BOARD_END) + 1 + (x))
+
+/* IRQ-sources in 3 groups - local devices, LPC (serial), and external PCI */
+#define IT8152_LD_IRQ_COUNT     9
+#define IT8152_LP_IRQ_COUNT     16
+#define IT8152_PD_IRQ_COUNT     15
+
+/* Priorities: */
+#define IT8152_PD_IRQ(i)        IT8152_IRQ(i)
+#define IT8152_LP_IRQ(i)        (IT8152_IRQ(i) + IT8152_PD_IRQ_COUNT)
+#define IT8152_LD_IRQ(i)        (IT8152_IRQ(i) + IT8152_PD_IRQ_COUNT + IT8152_LP_IRQ_COUNT)
+
+#define IT8152_LAST_IRQ         IT8152_LD_IRQ(IT8152_LD_IRQ_COUNT - 1)
+
+#undef NR_IRQS
+#define NR_IRQS (IT8152_LAST_IRQ+1)
+#endif

include/asm-arm/arch-pxa/memory.h

@@ -39,4 +39,14 @@
  */
 #define NODE_MEM_SIZE_BITS	26
 
+#if !defined(__ASSEMBLY__) && defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
+void cmx270_pci_adjust_zones(int node, unsigned long *size,
+			     unsigned long *holes);
+
+#define arch_adjust_zones(node, size, holes) \
+	cmx270_pci_adjust_zones(node, size, holes)
+
+#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_64M - 1)
+#endif
+
 #endif