patch-2.4.19 linux-2.4.19/arch/arm/mach-sa1100/badge4.c

• Lines: 214
• Date: Fri Aug 2 17:39:42 2002
• Orig file: linux-2.4.18/arch/arm/mach-sa1100/badge4.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/arm/mach-sa1100/badge4.c linux-2.4.19/arch/arm/mach-sa1100/badge4.c
@@ -0,0 +1,213 @@
+/*
+ * linux/arch/arm/mach-sa1100/badge4.c
+ *
+ * BadgePAD 4 specific initialization
+ *
+ *   Tim Connors <connors@hpl.hp.com>
+ *   Christopher Hoover <ch@hpl.hp.com>
+ *
+ * Copyright (C) 2002 Hewlett-Packard Company
+ *
+ * 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/kernel.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/errno.h>
+
+#include <asm/hardware.h>
+#include <asm/setup.h>
+#include <asm/arch/irqs.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/hardware/sa1111.h>
+#include <asm/mach/serial_sa1100.h>
+
+#include "generic.h"
+#include "sa1111.h"
+
+static int __init badge4_sa1111_init(void)
+{
+	int ret;
+
+	/*
+	 * Ensure that the memory bus request/grant signals are setup,
+	 * and the grant is held in its inactive state
+	 */
+	sa1110_mb_disable();
+
+	/*
+	 * Probe for SA1111.
+	 */
+	ret = sa1111_probe(BADGE4_SA1111_BASE);
+	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));
+
+	/*
+	 * 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(BADGE4_GPIO_INT_1111, GPIO_RISING_EDGE);
+	sa1111_init_irq(BADGE4_IRQ_GPIO_SA1111);
+
+	return 0;
+}
+
+static int __init badge4_init(void)
+{
+	int ret;
+
+	if (!machine_is_badge4())
+		return -ENODEV;
+
+	ret = badge4_sa1111_init();
+	if (ret < 0)
+		printk(KERN_ERR __FUNCTION__
+		       ": SA-1111 initialization failed (%d)\n", ret);
+
+	/* N.B, according to rmk this is the singular place that GPDR
+           should be set */
+
+	/* Video expansion */
+	GPCR  = (BADGE4_GPIO_INT_VID | BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
+		 BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 | BADGE4_GPIO_LGP6 |
+		 BADGE4_GPIO_LGP7 | BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
+		 BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
+		 BADGE4_GPIO_GPC_VID);
+	GPDR |= (BADGE4_GPIO_INT_VID | BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
+		 BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 | BADGE4_GPIO_LGP6 |
+		 BADGE4_GPIO_LGP7 | BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
+		 BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
+		 BADGE4_GPIO_GPC_VID);
+
+	/* SDRAM SPD i2c */
+	GPCR  = (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
+	GPDR |= (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
+
+	/* uart */
+	GPCR  = (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
+	GPDR |= (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
+
+	/* drives CPLD muxsel0 input */
+	GPCR  = BADGE4_GPIO_MUXSEL0;
+	GPDR |= BADGE4_GPIO_MUXSEL0;
+
+	/* test points */
+	GPCR  = (BADGE4_GPIO_TESTPT_J7 | BADGE4_GPIO_TESTPT_J6 |
+		 BADGE4_GPIO_TESTPT_J5);
+	GPDR |= (BADGE4_GPIO_TESTPT_J7 | BADGE4_GPIO_TESTPT_J6 |
+		 BADGE4_GPIO_TESTPT_J5);
+
+	/* drives CPLD sdram type inputs; this shouldn't be needed;
+           bootloader left it this way. */
+	GPDR |= (BADGE4_GPIO_SDTYP0 | BADGE4_GPIO_SDTYP1);
+
+  	/* 5V supply rail. */
+  	GPCR  = BADGE4_GPIO_PCMEN5V;		/* initially off */
+   	GPDR |= BADGE4_GPIO_PCMEN5V;
+
+	/* drives SA1111 reset pin; this shouldn't be needed;
+           bootloader left it this way. */
+	GPSR  = BADGE4_GPIO_SA1111_NRST;
+	GPDR |= BADGE4_GPIO_SA1111_NRST;
+
+	return 0;
+}
+
+__initcall(badge4_init);
+
+
+static unsigned badge4_5V_bitmap = 0;
+
+void badge4_set_5V(unsigned subsystem, int on)
+{
+	unsigned long flags;
+	unsigned old_5V_bitmap;
+
+	local_irq_save(flags);
+
+	old_5V_bitmap = badge4_5V_bitmap;
+
+	if (on) {
+		badge4_5V_bitmap |= subsystem;
+	} else {
+		badge4_5V_bitmap &= ~subsystem;
+	}
+
+	/* detect on->off and off->on transitions */
+	if ((!old_5V_bitmap) && (badge4_5V_bitmap)) {
+		/* was off, now on */
+		printk(KERN_INFO __FUNCTION__ ": enabling 5V supply rail\n");
+		GPSR = BADGE4_GPIO_PCMEN5V;
+	} else if ((old_5V_bitmap) && (!badge4_5V_bitmap)) {
+		/* was on, now off */
+		printk(KERN_INFO __FUNCTION__ ": disabling 5V supply rail\n");
+		GPCR = BADGE4_GPIO_PCMEN5V;
+	}
+
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(badge4_set_5V);
+
+
+static void __init
+fixup_badge4(struct machine_desc *desc, struct param_struct *params,
+	    char **cmdline, struct meminfo *mi)
+{
+	/* nothing needed here */
+}
+
+static struct map_desc badge4_io_desc[] __initdata = {
+  /*  virtual    physical    length      domain   r w c b		   */
+  {0xe8000000, 0x00000000, 0x02000000, DOMAIN_IO, 0,1,0,0},/* Flash bank 0 */
+  {0xf1000000, 0x08000000, 0x00100000, DOMAIN_IO, 0,1,0,0},/* SRAM  bank 1 */
+  {0xf2000000, 0x10000000, 0x00100000, DOMAIN_IO, 0,1,0,0},/* SRAM  bank 2 */
+  {0xf4000000, 0x48000000, 0x00100000, DOMAIN_IO, 0,1,0,0},/* SA-1111      */
+  LAST_DESC
+};
+
+static void __init badge4_map_io(void)
+{
+	sa1100_map_io();
+	iotable_init(badge4_io_desc);
+
+	sa1100_register_uart(0, 3);
+	sa1100_register_uart(1, 1);
+}
+
+MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
+	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
+	BOOT_PARAMS(0xc0000100)
+	FIXUP(fixup_badge4)
+	MAPIO(badge4_map_io)
+	INITIRQ(sa1100_init_irq)
+MACHINE_END