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