patch-2.4.22 linux-2.4.22/arch/arm/mach-sa1100/adsbitsyplus.c

• Lines: 396
• Date: 2003-08-25 04:44:39.000000000 -0700
• Orig file: linux-2.4.21/arch/arm/mach-sa1100/adsbitsyplus.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/arm/mach-sa1100/adsbitsyplus.c linux-2.4.22/arch/arm/mach-sa1100/adsbitsyplus.c
@@ -0,0 +1,395 @@
+/*
+ * linux/arch/arm/mach-sa1100/adsbitsyplus.c
+ *
+ * Author: Robert Whaley
+ *
+ * This file comes from adsbitsy.c of Woojung Huh <whuh@applieddata.net>
+ *
+ * Pieces specific to the ADS Bitsy Plus
+ *
+ * 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/delay.h>
+#include <linux/serial_core.h>
+
+#include <asm/hardware.h>
+#include <asm/hardware/sa1111.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"
+
+/* unfortunately, we can't detect the difference between REV 2 and REV A
+   connector boards.  So by convention, the registers.txt file is used
+   to set a byte to either 0x02 or 0x0a to make this distinction.  The
+   bootloader must detect this by default we assume rev A since most boards
+   will be rev A */
+
+static int adsbitsyplus_connector_board_rev_number = 0xA;
+
+static int __init adsbitsyplus_connector_board_rev_setup(char *str)
+{
+	adsbitsyplus_connector_board_rev_number = simple_strtol(str,NULL,0);
+	return 1;
+}
+
+int adsbitsyplus_connector_board_rev(void)
+{
+	static int only_once = 1;
+	if (only_once) {
+		printk(KERN_INFO "Bitsy Connector Board REV: %#x\n", adsbitsyplus_connector_board_rev_number);
+		only_once = 0;
+	}
+	return adsbitsyplus_connector_board_rev_number;
+}
+
+static int __init adsbitsyplus_init(void)
+{
+	int ret;
+
+	if (!machine_is_adsbitsyplus())
+		return -ENODEV;
+
+	/*
+	 * Ensure that the memory bus request/grant signals are setup,
+	 * and the grant is held in its inactive state
+	 */
+	sa1110_mb_disable();
+
+	/* Bitsy uses GPIO pins for SPI interface to AVR
+	 * Bitsy Plus uses the standard pins instead.
+	 * it also needs to reset the AVR when booting
+	 */
+
+	PPAR &= ~PPAR_SSPGPIO;
+	ADS_CPLD_SUPPC |= ADS_SUPPC_AVR_WKP;
+	mdelay(100);
+	ADS_CPLD_SUPPC &= ~ADS_SUPPC_AVR_WKP;
+
+	/*
+	 * Reset SA1111
+	 */
+	GPCR |= GPIO_GPIO26;
+	udelay(1000);
+	GPSR |= GPIO_GPIO26;
+
+#ifndef CONFIG_LEDS_TIMER
+	// Set Serial port 1 RTS and DTR Low during sleep
+	PGSR |= GPIO_GPIO15 | GPIO_GPIO20;
+#else
+	// only RTS (because DTR is also the LED
+	// which should be off during sleep);
+	PGSR |= GPIO_GPIO15;
+#endif
+
+	// Set Serial port 3RTS Low during sleep
+	PGSR |= GPIO_GPIO19;
+
+	/*
+	 * Probe for SA1111.
+	 */
+	ret = sa1111_probe(ADSBITSYPLUS_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(GPIO_GPIO0, GPIO_RISING_EDGE);
+	sa1111_init_irq(IRQ_GPIO0);
+
+	return 0;
+}
+
+__initcall(adsbitsyplus_init);
+
+static void __init adsbitsyplus_init_irq(void)
+{
+	/* First the standard SA1100 IRQs */
+	sa1100_init_irq();
+}
+
+/*
+ * Resume SA1111 when system wakes up
+ */
+void adsbitsyplus_sa1111_wake(unsigned long pa_dwr)
+{
+	// Turn ON SA1111
+	GPCR |= GPIO_GPIO26;
+	mdelay(1);
+	GPSR |= GPIO_GPIO26;
+
+	GAFR |= GPIO_32_768kHz;
+	GPDR |= GPIO_32_768kHz;
+	TUCR = TUCR_3_6864MHz;
+
+	SBI_SKCR = SKCR_PLL_BYPASS | SKCR_RDYEN | SKCR_OE_EN;
+	udelay(100);
+	SBI_SKCR = SKCR_PLL_BYPASS | SKCR_RCLKEN | SKCR_RDYEN | SKCR_OE_EN;
+
+	GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
+	GPDR |= GPIO_MBGNT;
+	GPDR &= ~GPIO_MBREQ;
+	TUCR |= TUCR_MR;
+
+	sa1111_configure_smc(1,
+			     FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
+			     FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
+	SKPCR |= SKPCR_DCLKEN;
+
+	// Reset PCMCIA
+	PCCR = 0xFF;
+	mdelay(100);
+	PA_DDR = 0x00;
+	// PA_DWR = GPIO_GPIO0 | GPIO_GPIO1 | GPIO_GPIO2 | GPIO_GPIO3;
+	// PA_DWR = GPIO_GPIO0 | GPIO_GPIO2 | GPIO_GPIO3;
+	PA_DWR = pa_dwr;
+	PCCR = ~(PCCR_S0_RST | PCCR_S1_RST);
+
+#ifdef CONFIG_USB_OHCI_SA1111
+	// Turn ON clock
+	SKPCR |= SKPCR_UCLKEN;
+	udelay(100);
+
+	// force a RESET
+	USB_RESET = 0x01;
+	USB_RESET |= 0x02;
+	udelay(100);
+
+	// Set Power Sense and Control Line
+	USB_RESET = 0;
+	USB_RESET = USB_RESET_PWRSENSELOW;
+	USB_STATUS = 0;
+	udelay(10);
+#endif
+}
+
+
+static struct map_desc adsbitsyplus_io_desc[] __initdata = {
+ /* virtual     physical    length      domain     r  w  c  b */
+  { 0xe8000000, 0x08000000, 0x02000000, DOMAIN_IO, 0, 1, 0, 0 }, /* Flash bank 1 */
+  { 0xf0000000, 0x3C000000, 0x00004000, DOMAIN_IO, 0, 1, 0, 0 }, /* 91C1111 */
+  { 0xf4000000, 0x18000000, 0x00800000, DOMAIN_IO, 0, 1, 0, 0 }, /* SA1111 */
+  { 0xf1000000, 0x10000000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* CPLD Controller */
+  LAST_DESC
+};
+
+/* Use this to see when all uarts are shutdown.  Or all are closed.
+ * We can only turn off RS232 chip if either of these are true.
+ */
+
+static int uart_wake_count[3] = {1, 1, 1};
+
+enum {UART_SHUTDOWN, UART_WAKEUP};
+
+static void update_uart_counts(int line, int state)
+{
+	switch (state) {
+	case UART_WAKEUP:
+		uart_wake_count[line]++;
+		break;
+	case UART_SHUTDOWN:
+		uart_wake_count[line]--;
+		break;
+	}
+}
+
+static int adsbitsyplus_uart_open(struct uart_port *port, struct uart_info *info)
+{
+	if (port->mapbase == _Ser1UTCR0) {
+		Ser1SDCR0 |= SDCR0_UART;
+	} else if (port->mapbase == _Ser2UTCR0) {
+		Ser2UTCR4 = Ser2HSCR0 = 0;
+	}
+	return 0;
+}
+
+void adsbitsyplus_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
+{
+	// state has ACPI D0-D3
+	// ACPI D0 	  : resume from suspend
+	// ACPI D1-D3 : enter to a suspend state
+	if (port->mapbase == _Ser1UTCR0) {
+		if (state) {
+			update_uart_counts(1, UART_SHUTDOWN);
+                        // disable uart
+                        Ser1UTCR3 = 0;
+		}
+		else {
+			update_uart_counts(1, UART_WAKEUP);
+		}
+	}
+	else if (port->mapbase == _Ser2UTCR0) {
+		if (state) {
+			update_uart_counts(2, UART_SHUTDOWN);
+                        // disable uart
+                        Ser2UTCR3 = 0;
+                        Ser2HSCR0 = 0;
+		}
+		else {
+			update_uart_counts(2, UART_WAKEUP);
+		}
+	}
+	else if (port->mapbase == _Ser3UTCR0) {
+		if (state) {
+			update_uart_counts(0, UART_SHUTDOWN);
+                        // disable uart
+                        Ser3UTCR3 = 0;
+		}
+		else {
+			update_uart_counts(0, UART_WAKEUP);
+		}
+	}
+        if (state == 0) {
+		// Turn power on if uarts are awake
+		if (uart_wake_count[0] + uart_wake_count[1] != 0) {
+			// make sure RS-232 is turned on if 1 or 3 are open
+			ADS_CPLD_PCON |= ADS_PCON_COM1_3_ON;
+		}
+		if (uart_wake_count[2] != 0) {
+			if (adsbitsyplus_connector_board_rev() >= 0x0a)
+				ADS_CPLD_PCON |= ADS_PCON_CONN_B_PE2;
+		}
+	}
+	else {
+		// Turn power off if uarts are asleep
+		if (uart_wake_count[0] + uart_wake_count[1] == 0) {
+			// save power if we are sleeping
+			ADS_CPLD_PCON &= ~ADS_PCON_COM1_3_ON;
+			GAFR &= ~(GPIO_GPIO15 | GPIO_GPIO19 | GPIO_GPIO20);
+			GPDR |= GPIO_GPIO15 | GPIO_GPIO19 | GPIO_GPIO20;
+		}
+		if (uart_wake_count[2] == 0) {
+			if (adsbitsyplus_connector_board_rev() >= 0x0a)
+				ADS_CPLD_PCON &= ~ADS_PCON_CONN_B_PE2;
+		}
+	}
+}
+
+static void adsbitsyplus_set_mctrl(struct uart_port *port, u_int mctrl)
+{
+	// note: only ports 1 and 3 have modem control
+	if (port->mapbase == _Ser1UTCR0) {
+		if (mctrl & TIOCM_RTS)
+			// Set RTS High
+			GPCR = GPIO_GPIO15;
+		else
+			// Set RTS LOW
+			GPSR = GPIO_GPIO15;
+		if (mctrl & TIOCM_DTR)
+			// Set DTR High
+			GPCR = GPIO_GPIO20;
+		else
+			// Set DTR Low
+			GPSR = GPIO_GPIO20;
+	} else if (port->mapbase == _Ser3UTCR0) {
+		if (mctrl & TIOCM_RTS)
+			// Set RTS High
+			GPCR = GPIO_GPIO19;
+		else
+			// Set RTS LOW
+			GPSR = GPIO_GPIO19;
+	}
+}
+
+static u_int adsbitsyplus_get_mctrl(struct uart_port *port)
+{
+	u_int ret = 0;
+
+	// note: only ports 1 and 3 have modem control
+	if (port->mapbase == _Ser1UTCR0) {
+		if (!(GPLR & GPIO_GPIO14))
+			ret |= TIOCM_CTS;
+		if (!(GPLR & GPIO_GPIO24))
+			ret |= TIOCM_DSR;
+		if (!(GPLR & GPIO_GPIO16))
+			ret |= TIOCM_RI;
+		if (!(GPLR & GPIO_GPIO17))
+			ret |= TIOCM_CD;
+	} else if (port->mapbase == _Ser3UTCR0) {
+		if (!(GPLR & GPIO_GPIO18))
+			ret |= TIOCM_CTS;
+	}
+
+	return ret;
+}
+
+static struct sa1100_port_fns adsbitsyplus_port_fns __initdata = {
+	.set_mctrl =    adsbitsyplus_set_mctrl,
+	.get_mctrl =    adsbitsyplus_get_mctrl,
+	.open =	        adsbitsyplus_uart_open,
+	.pm =           adsbitsyplus_uart_pm,
+};
+
+static void __init adsbitsyplus_map_io(void)
+{
+	sa1100_map_io();
+	iotable_init(adsbitsyplus_io_desc);
+
+	sa1100_register_uart_fns(&adsbitsyplus_port_fns);
+	sa1100_register_uart(0, 3);
+	sa1100_register_uart(1, 1);
+
+	// don't register if you want to use IRDA
+#ifndef CONFIG_SA1100_FIR
+	sa1100_register_uart(2, 2);
+#endif
+
+	// COM1 Set RTS and DTR Output
+	GPDR |= GPIO_GPIO15 | GPIO_GPIO20;
+	// Set CTS, DSR, RI and CD Input
+	GPDR &= ~(GPIO_GPIO14 | GPIO_GPIO24 | GPIO_GPIO16 | GPIO_GPIO17);
+
+	// COM3 Set RTS Output
+	GPDR |= GPIO_GPIO19;
+	// Set CTS Input
+	GPDR &= ~GPIO_GPIO18;
+}
+
+__setup("adsbitsyplus_conn_board_rev=", adsbitsyplus_connector_board_rev_setup);
+
+MACHINE_START(ADSBITSYPLUS, "ADS Bitsy Plus")
+        BOOT_PARAMS(0xc000003c)
+	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
+	MAPIO(adsbitsyplus_map_io)
+	INITIRQ(adsbitsyplus_init_irq)
+MACHINE_END