patch-2.4.13 linux/arch/arm/mach-sa1100/adsbitsy.c

• Lines: 181
• Date: Thu Oct 11 09:04:57 2001
• Orig file: v2.4.12/linux/arch/arm/mach-sa1100/adsbitsy.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.12/linux/arch/arm/mach-sa1100/adsbitsy.c linux/arch/arm/mach-sa1100/adsbitsy.c
@@ -0,0 +1,180 @@
+/*
+ * linux/arch/arm/mach-sa1100/adsbitsy.c
+ *
+ * Author: Woojung Huh
+ *
+ * Pieces specific to the ADS Bitsy
+ *
+ * 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 <linux/serial_core.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"
+#include "sa1111.h"
+
+static int __init adsbitsy_init(void)
+{
+	int ret;
+
+	if (!machine_is_adsbitsy())
+		return -ENODEV;
+
+	/*
+	 * Ensure that the memory bus request/grant signals are setup,
+	 * and the grant is held in its inactive state
+	 */
+	sa1110_mb_disable();
+
+	/*
+	 * Reset SA1111
+	 */
+	GPCR |= GPIO_GPIO26;
+	udelay(1000);
+	GPSR |= GPIO_GPIO26;
+
+	/*
+	 * Probe for SA1111.
+	 */
+	ret = sa1111_probe();
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * We found it.  Wake the chip up.
+	 */
+	sa1111_wake();
+
+	/*
+	 * The SDRAM configuration of the SA1110 and the SA1111 must
+	 * match.  This is very important to ensure that SA1111 accesses
+	 * don't corrupt the SDRAM.  Note that this ungates the SA1111's
+	 * MBGNT signal, so we must have called sa1110_mb_disable()
+	 * beforehand.
+	 */
+	sa1111_configure_smc(1,
+			     FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
+			     FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
+
+	/*
+	 * Enable PWM control for LCD
+	 */
+	SKPCR |= SKPCR_PWMCLKEN;
+	SKPWM0 = 0x7F;				// VEE
+	SKPEN0 = 1;
+	SKPWM1 = 0x01;				// Backlight
+	SKPEN1 = 1;
+
+	/*
+	 * We only need to turn on DCLK whenever we want to use the
+	 * DMA.  It can otherwise be held firmly in the off position.
+	 */
+	SKPCR |= SKPCR_DCLKEN;
+
+	/*
+	 * Enable the SA1110 memory bus request and grant signals.
+	 */
+	sa1110_mb_enable();
+
+	set_GPIO_IRQ_edge(GPIO_GPIO0, GPIO_RISING_EDGE);
+	sa1111_init_irq(SA1100_GPIO_TO_IRQ(0));
+
+	return 0;
+}
+
+__initcall(adsbitsy_init);
+
+static void __init adsbitsy_init_irq(void)
+{
+	/* First the standard SA1100 IRQs */
+	sa1100_init_irq();
+}
+
+
+/*
+ * Initialization fixup
+ */
+
+static void __init
+fixup_adsbitsy(struct machine_desc *desc, struct param_struct *params,
+		     char **cmdline, struct meminfo *mi)
+{
+	SET_BANK( 0, 0xc0000000, 32*1024*1024 );
+	mi->nr_banks = 1;
+
+	ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
+	setup_ramdisk( 1, 0, 0, 8192 );
+	setup_initrd( __phys_to_virt(0xc0800000), 4*1024*1024 );
+}
+
+static struct map_desc adsbitsy_io_desc[] __initdata = {
+ /* virtual     physical    length      domain     r  w  c  b */
+  { 0xe8000000, 0x08000000, 0x01000000, DOMAIN_IO, 1, 1, 0, 0 }, /* Flash bank 1 */
+  { 0xf4000000, 0x18000000, 0x00800000, DOMAIN_IO, 1, 1, 0, 0 }, /* SA1111 */
+  LAST_DESC
+};
+
+static int adsbitsy_uart_open(struct uart_port *port, struct uart_info *info)
+{
+	if (port->mapbase == _Ser1UTCR0) {
+		Ser1SDCR0 |= SDCR0_UART;
+		// Set RTS Output and High (should be done in the set_mctrl fn)
+		GPDR |= GPIO_GPIO15;
+		GPCR |= GPIO_GPIO15;
+		// Set CTS Input
+		GPDR &= ~GPIO_GPIO14;
+	} else if (port->mapbase == _Ser2UTCR0) {
+		Ser2UTCR4 = Ser2HSCR0 = 0;
+		// Set RTS Output and High (should be done in the set_mctrl fn)
+		GPDR |= GPIO_GPIO17;
+		GPCR |= GPIO_GPIO17;
+		// Set CTS Input
+		GPDR &= ~GPIO_GPIO16;
+	} else if (port->mapbase == _Ser2UTCR0) {
+		// Set RTS Output and High (should be done in the set_mctrl fn)
+		GPDR |= GPIO_GPIO19;
+		GPCR |= GPIO_GPIO19;
+		// Set CTS Input
+		GPDR &= ~GPIO_GPIO18;
+	}
+	return 0;
+}
+
+static struct sa1100_port_fns adsbitsy_port_fns __initdata = {
+	open:	adsbitsy_uart_open,
+};
+
+static void __init adsbitsy_map_io(void)
+{
+	sa1100_map_io();
+	iotable_init(adsbitsy_io_desc);
+
+	sa1110_register_uart_fns(&adsbitsy_port_fns);
+	sa1100_register_uart(0, 3);
+	sa1100_register_uart(1, 1);
+	sa1100_register_uart(2, 2);
+}
+
+MACHINE_START(ADSBITSY, "ADS Bitsy")
+	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
+	FIXUP(fixup_adsbitsy)
+	MAPIO(adsbitsy_map_io)
+	INITIRQ(adsbitsy_init_irq)
+MACHINE_END