patch-2.4.20 linux-2.4.20/arch/mips/vr41xx/common/serial.c

• Lines: 179
• Date: Thu Nov 28 15:53:10 2002
• Orig file: linux-2.4.19/arch/mips/vr41xx/common/serial.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/mips/vr41xx/common/serial.c linux-2.4.20/arch/mips/vr41xx/common/serial.c
@@ -0,0 +1,178 @@
+/*
+ * FILE NAME
+ *	arch/mips/vr41xx/common/serial.c
+ *
+ * BRIEF MODULE DESCRIPTION
+ *	Serial Interface Unit routines for NEC VR4100 series.
+ *
+ * Author: Yoichi Yuasa
+ *         yyuasa@mvista.com or source@mvista.com
+ *
+ * Copyright 2002 MontaVista Software Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*
+ * Changes:
+ *  MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
+ *  - Added support for NEC VR4111 and VR4121.
+ *
+ *  MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
+ *  - New creation, NEC VR4122 and VR4131 are supported.
+ */
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/serial.h>
+
+#include <asm/addrspace.h>
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/vr41xx/vr41xx.h>
+
+/* VR4111 and VR4121 SIU Registers */
+#define VR4111_SIURB		KSEG1ADDR(0x0c000000)
+#define VR4111_SIUIRSEL		KSEG1ADDR(0x0c000008)
+
+/* VR4122 and VR4131 SIU Registers */
+#define VR4122_SIURB		KSEG1ADDR(0x0f000800)
+#define VR4122_SIUIRSEL		KSEG1ADDR(0x0f000808)
+
+ #define USE_RS232C		0x00
+ #define USE_IRDA		0x01
+ #define SIU_USES_IRDA		0x00
+ #define FIR_USES_IRDA		0x02
+ #define IRDA_MODULE_SHARP	0x00
+ #define IRDA_MODULE_TEMIC	0x04
+ #define IRDA_MODULE_HP		0x08
+ #define TMICTX			0x10
+ #define TMICMODE		0x20
+
+#define SIU_BASE_BAUD		1152000
+#define SIU_CLOCK		0x0102
+#define SIU_IRQ			17
+
+/* VR4122 and VR4131 DSIU Registers */
+#define DSIURB			KSEG1ADDR(0x0f000820)
+
+#define MDSIUINTREG		KSEG1ADDR(0x0f000096)
+ #define INTDSIU		0x0800
+
+#define DSIU_BASE_BAUD		1152000
+#define DSIU_CLOCK		0x0802
+#define DSIU_IRQ		29
+
+int vr41xx_serial_ports = 0;
+
+void vr41xx_siu_ifselect(int interface, int module)
+{
+	u16 val = USE_RS232C;	/* Select RS-232C */
+
+	/* Select IrDA */
+	if (interface == SIU_IRDA) {
+		switch (module) {
+		case IRDA_SHARP:
+			val = IRDA_MODULE_SHARP;
+			break;
+		case IRDA_TEMIC:
+			val = IRDA_MODULE_TEMIC;
+			break;
+		case IRDA_HP:
+			val = IRDA_MODULE_HP;
+			break;
+		}
+		val |= USE_IRDA | SIU_USES_IRDA;
+	}
+
+	switch (mips_cpu.cputype) {
+	case CPU_VR4111:
+	case CPU_VR4121:
+		writew(val, VR4111_SIUIRSEL);
+		break;
+	case CPU_VR4122:
+	case CPU_VR4131:
+		writew(val, VR4122_SIUIRSEL);
+		break;
+	default:
+		printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n");
+		break;
+	}
+}
+
+void __init vr41xx_siu_init(int interface, int module)
+{
+	struct serial_struct s;
+
+	vr41xx_siu_ifselect(interface, module);
+
+	memset(&s, 0, sizeof(s));
+
+	s.line = vr41xx_serial_ports;
+	s.baud_base = SIU_BASE_BAUD;
+	s.irq = SIU_IRQ;
+	s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
+	switch (mips_cpu.cputype) {
+	case CPU_VR4111:
+	case CPU_VR4121:
+		s.iomem_base = (unsigned char *)VR4111_SIURB;
+		break;
+	case CPU_VR4122:
+	case CPU_VR4131:
+		s.iomem_base = (unsigned char *)VR4122_SIURB;
+		break;
+	default:
+		panic("Unexpected CPU of NEC VR4100 series");
+		break;
+	}
+	s.iomem_reg_shift = 0;
+	s.io_type = SERIAL_IO_MEM;
+	if (early_serial_setup(&s) != 0)
+		printk(KERN_ERR "SIU setup failed!\n");
+
+	vr41xx_clock_supply(SIU_CLOCK);
+
+	vr41xx_serial_ports++;
+}
+
+void __init vr41xx_dsiu_init(void)
+{
+	struct serial_struct s;
+
+	if (mips_cpu.cputype != CPU_VR4122 && mips_cpu.cputype != CPU_VR4131)
+		return;
+
+	memset(&s, 0, sizeof(s));
+
+	s.line = vr41xx_serial_ports;
+	s.baud_base = DSIU_BASE_BAUD;
+	s.irq = DSIU_IRQ;
+	s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
+	s.iomem_base = (unsigned char *)DSIURB;
+	s.iomem_reg_shift = 0;
+	s.io_type = SERIAL_IO_MEM;
+	if (early_serial_setup(&s) != 0)
+		printk(KERN_ERR "DSIU setup failed!\n");
+
+	vr41xx_clock_supply(DSIU_CLOCK);
+
+	writew(INTDSIU, MDSIUINTREG);
+
+	vr41xx_serial_ports++;
+}