patch-2.4.9 linux/arch/arm/mach-sa1100/graphicsclient.c

• Lines: 161
• Date: Sun Aug 12 11:13:59 2001
• Orig file: v2.4.8/linux/arch/arm/mach-sa1100/graphicsclient.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.8/linux/arch/arm/mach-sa1100/graphicsclient.c linux/arch/arm/mach-sa1100/graphicsclient.c
@@ -0,0 +1,160 @@
+/*
+ * linux/arch/arm/mach-sa1100/graphicsclient.c
+ *
+ * Author: Nicolas Pitre
+ *
+ * Pieces specific to the GraphicsClient board
+ *
+ * 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/init.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+
+#include <asm/hardware.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+
+#include <asm/mach/irq.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/serial_sa1100.h>
+
+#include <asm/arch/irq.h>
+
+#include "generic.h"
+
+
+/*
+ * Handlers for GraphicsClient's external IRQ logic
+ */
+
+static void ADS_IRQ_demux( int irq, void *dev_id, struct pt_regs *regs )
+{
+	int i;
+
+	while( (irq = ADS_INT_ST1 | (ADS_INT_ST2 << 8)) ){
+		for( i = 0; i < 16; i++ )
+			if( irq & (1<<i) )
+				do_IRQ( ADS_EXT_IRQ(i), regs );
+	}
+}
+
+static struct irqaction ADS_ext_irq = {
+	name:		"ADS_ext_IRQ",
+	handler:	ADS_IRQ_demux,
+	flags:		SA_INTERRUPT
+};
+
+static void ADS_mask_and_ack_irq0(unsigned int irq)
+{
+	int mask = (1 << (irq - ADS_EXT_IRQ(0)));
+	ADS_INT_EN1 &= ~mask;
+	ADS_INT_ST1 = mask;
+}
+
+static void ADS_mask_irq0(unsigned int irq)
+{
+	ADS_INT_ST1 = (1 << (irq - ADS_EXT_IRQ(0)));
+}
+
+static void ADS_unmask_irq0(unsigned int irq)
+{
+	ADS_INT_EN1 |= (1 << (irq - ADS_EXT_IRQ(0)));
+}
+
+static void ADS_mask_and_ack_irq1(unsigned int irq)
+{
+	int mask = (1 << (irq - ADS_EXT_IRQ(8)));
+	ADS_INT_EN2 &= ~mask;
+	ADS_INT_ST2 = mask;
+}
+
+static void ADS_mask_irq1(unsigned int irq)
+{
+	ADS_INT_ST2 = (1 << (irq - ADS_EXT_IRQ(8)));
+}
+
+static void ADS_unmask_irq1(unsigned int irq)
+{
+	ADS_INT_EN2 |= (1 << (irq - ADS_EXT_IRQ(8)));
+}
+
+static void __init graphicsclient_init_irq(void)
+{
+	int irq;
+
+	/* First the standard SA1100 IRQs */
+	sa1100_init_irq();
+
+	/* disable all IRQs */
+	ADS_INT_EN1 = 0;
+	ADS_INT_EN2 = 0;
+	/* clear all IRQs */
+	ADS_INT_ST1 = 0xff;
+	ADS_INT_ST2 = 0xff;
+
+	for (irq = ADS_EXT_IRQ(0); irq <= ADS_EXT_IRQ(7); irq++) {
+		irq_desc[irq].valid	= 1;
+		irq_desc[irq].probe_ok	= 1;
+		irq_desc[irq].mask_ack	= ADS_mask_and_ack_irq0;
+		irq_desc[irq].mask	= ADS_mask_irq0;
+		irq_desc[irq].unmask	= ADS_unmask_irq0;
+	}
+	for (irq = ADS_EXT_IRQ(8); irq <= ADS_EXT_IRQ(15); irq++) {
+		irq_desc[irq].valid	= 1;
+		irq_desc[irq].probe_ok	= 1;
+		irq_desc[irq].mask_ack	= ADS_mask_and_ack_irq1;
+		irq_desc[irq].mask	= ADS_mask_irq1;
+		irq_desc[irq].unmask	= ADS_unmask_irq1;
+	}
+	GPDR &= ~GPIO_GPIO0;
+	set_GPIO_IRQ_edge(GPIO_GPIO0, GPIO_FALLING_EDGE);
+	setup_arm_irq( IRQ_GPIO0, &ADS_ext_irq );
+}
+
+
+/*
+ * Initialization fixup
+ */
+
+static void __init
+fixup_graphicsclient(struct machine_desc *desc, struct param_struct *params,
+		     char **cmdline, struct meminfo *mi)
+{
+	SET_BANK( 0, 0xc0000000, 16*1024*1024 );
+	SET_BANK( 1, 0xc8000000, 16*1024*1024 );
+	mi->nr_banks = 2;
+
+	ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
+	setup_ramdisk( 1, 0, 0, 4096 );
+	setup_initrd( __phys_to_virt(0xc0800000), 4*1024*1024 );
+}
+
+static struct map_desc graphicsclient_io_desc[] __initdata = {
+ /* virtual     physical    length      domain     r  w  c  b */
+  { 0xe8000000, 0x08000000, 0x01000000, DOMAIN_IO, 1, 1, 0, 0 }, /* Flash bank 1 */
+  { 0xf0000000, 0x10000000, 0x00400000, DOMAIN_IO, 0, 1, 0, 0 }, /* CPLD */
+  LAST_DESC
+};
+
+static void __init graphicsclient_map_io(void)
+{
+	sa1100_map_io();
+	iotable_init(graphicsclient_io_desc);
+
+	sa1100_register_uart(0, 3);
+	sa1100_register_uart(1, 1);
+	sa1100_register_uart(2, 2);
+}
+
+MACHINE_START(GRAPHICSCLIENT, "ADS GraphicsClient")
+	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
+	FIXUP(fixup_graphicsclient)
+	MAPIO(graphicsclient_map_io)
+	INITIRQ(graphicsclient_init_irq)
+MACHINE_END