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

• Lines: 176
• Date: Sun Aug 12 17:36:24 2001
• Orig file: v2.4.8/linux/arch/arm/mach-sa1100/bitsy.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.8/linux/arch/arm/mach-sa1100/bitsy.c linux/arch/arm/mach-sa1100/bitsy.c
@@ -0,0 +1,175 @@
+/*
+ * linux/arch/arm/mach-sa1100/bitsy.c
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/tty.h>
+#include <linux/sched.h>
+
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/setup.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/serial_sa1100.h>
+#include <linux/serial_core.h>
+
+#include "generic.h"
+
+
+/*
+ * Bitsy has extended, write-only memory-mapped GPIO's
+ */
+
+static int bitsy_egpio = EGPIO_BITSY_RS232_ON;
+
+void clr_bitsy_egpio(unsigned long x)
+{
+	bitsy_egpio &= ~x;
+	BITSY_EGPIO = bitsy_egpio;
+}
+
+void set_bitsy_egpio(unsigned long x)
+{
+	bitsy_egpio |= x;
+	BITSY_EGPIO = bitsy_egpio;
+}
+
+EXPORT_SYMBOL(clr_bitsy_egpio);
+EXPORT_SYMBOL(set_bitsy_egpio);
+
+
+/*
+ * low-level UART features
+ */
+
+static void bitsy_uart_set_mctrl(struct uart_port *port, u_int mctrl)
+{
+	if (port->mapbase == _Ser3UTCR0) {
+		if (mctrl & TIOCM_RTS)
+			GPCR = GPIO_BITSY_COM_RTS;
+		else
+			GPSR = GPIO_BITSY_COM_RTS;
+	}
+}
+
+static int bitsy_uart_get_mctrl(struct uart_port *port)
+{
+	int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
+
+	if (port->mapbase == _Ser3UTCR0) {
+		int gplr = GPLR;
+		if (gplr & GPIO_BITSY_COM_DCD)
+			ret &= ~TIOCM_CD;
+		if (gplr & GPIO_BITSY_COM_CTS)
+			ret &= ~TIOCM_CTS;
+	}
+
+	return ret;
+}
+
+static void bitsy_dcd_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct uart_info *info = dev_id;
+	/* Note: should only call this if something has changed */
+	uart_handle_dcd_change(info, GPLR & GPIO_BITSY_COM_DCD);
+}
+
+static void bitsy_cts_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct uart_info *info = dev_id;
+	/* Note: should only call this if something has changed */
+	uart_handle_cts_change(info, GPLR & GPIO_BITSY_COM_CTS);
+}
+
+static void bitsy_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
+{
+	if (port->mapbase == _Ser2UTCR0) {
+		if (state == 0) {
+			set_bitsy_egpio(EGPIO_BITSY_IR_ON);
+		} else {
+			clr_bitsy_egpio(EGPIO_BITSY_IR_ON);
+		}
+	} else if (port->mapbase == _Ser3UTCR0) {
+		if (state == 0) {
+			set_bitsy_egpio(EGPIO_BITSY_RS232_ON);
+		} else {
+			clr_bitsy_egpio(EGPIO_BITSY_RS232_ON);
+		}
+	}
+}
+
+static int bitsy_uart_open(struct uart_port *port, struct uart_info *info)
+{
+	int ret = 0;
+
+	if (port->mapbase == _Ser2UTCR0) {
+		Ser2UTCR4 = UTCR4_HSE;
+		Ser2HSCR0 = 0;
+		Ser2HSSR0 = HSSR0_EIF | HSSR0_TUR |
+			    HSSR0_RAB | HSSR0_FRE;
+	} else if (port->mapbase == _Ser3UTCR0) {
+		GPDR &= ~(GPIO_BITSY_COM_DCD|GPIO_BITSY_COM_CTS);
+		GPDR |= GPIO_BITSY_COM_RTS;
+		set_GPIO_IRQ_edge(GPIO_BITSY_COM_DCD|GPIO_BITSY_COM_CTS,
+				  GPIO_BOTH_EDGES);
+
+		ret = request_irq(IRQ_GPIO_BITSY_COM_DCD, bitsy_dcd_intr,
+				  0, "RS232 DCD", info);
+		if (ret)
+			return ret;
+
+		ret = request_irq(IRQ_GPIO_BITSY_COM_CTS, bitsy_cts_intr,
+				  0, "RS232 CTS", info);
+		if (ret)
+			free_irq(IRQ_GPIO_BITSY_COM_DCD, info);
+	}
+	return ret;
+}
+
+static void bitsy_uart_close(struct uart_port *port, struct uart_info *info)
+{
+	if (port->mapbase == _Ser3UTCR0) {
+		free_irq(IRQ_GPIO_BITSY_COM_DCD, info);
+		free_irq(IRQ_GPIO_BITSY_COM_CTS, info);
+	}
+}
+
+static struct sa1100_port_fns bitsy_port_fns __initdata = {
+	set_mctrl:	bitsy_uart_set_mctrl,
+	get_mctrl:	bitsy_uart_get_mctrl,
+	pm:		bitsy_uart_pm,
+	open:		bitsy_uart_open,
+	close:		bitsy_uart_close,
+};
+
+static struct map_desc bitsy_io_desc[] __initdata = {
+ /* virtual     physical    length      domain     r  w  c  b */
+  { 0xe8000000, 0x00000000, 0x02000000, DOMAIN_IO, 1, 1, 0, 0 }, /* Flash bank 0 */
+  { 0xf0000000, 0x49000000, 0x00100000, DOMAIN_IO, 0, 1, 0, 0 }, /* EGPIO 0 */
+  { 0xf1000000, 0x10000000, 0x02000000, DOMAIN_IO, 1, 1, 0, 0 }, /* static memory bank 2 */
+  { 0xf3000000, 0x40000000, 0x02000000, DOMAIN_IO, 1, 1, 0, 0 }, /* static memory bank 4 */
+  LAST_DESC
+};
+
+static void __init bitsy_map_io(void)
+{
+	sa1100_map_io();
+	iotable_init(bitsy_io_desc);
+
+	sa1100_register_uart_fns(&bitsy_port_fns);
+	sa1100_register_uart(0, 3);
+	sa1100_register_uart(1, 1); /* isn't this one driven elsewhere? */
+	sa1100_register_uart(2, 2);
+}
+
+MACHINE_START(BITSY, "Compaq iPAQ")
+	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
+	BOOT_PARAMS(0xc0000100)
+	MAPIO(bitsy_map_io)
+	INITIRQ(sa1100_init_irq)
+MACHINE_END