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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [mips/] [vr41xx/] [common/] [serial.c] - Blame information for rev 1275

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Line No. Rev Author Line
1 1275 phoenix
/*
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 * FILE NAME
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 *      arch/mips/vr41xx/common/serial.c
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 *
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 * BRIEF MODULE DESCRIPTION
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 *      Serial Interface Unit routines for NEC VR4100 series.
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 *
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 * Author: Yoichi Yuasa
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 *         yyuasa@mvista.com or source@mvista.com
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 *
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 * Copyright 2002 MontaVista Software Inc.
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 *
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 *  This program is free software; you can redistribute it and/or modify it
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 *  under the terms of the GNU General Public License as published by the
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 *  Free Software Foundation; either version 2 of the License, or (at your
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 *  option) any later version.
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 *
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 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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 *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 *  You should have received a copy of the GNU General Public License along
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 *  with this program; if not, write to the Free Software Foundation, Inc.,
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 *  675 Mass Ave, Cambridge, MA 02139, USA.
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 */
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/*
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 * Changes:
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 *  MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
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 *  - New creation, NEC VR4122 and VR4131 are supported.
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 *  - Added support for NEC VR4111 and VR4121.
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 *
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 *  Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
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 *  - Added support for NEC VR4133.
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 */
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/serial.h>
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#include <asm/addrspace.h>
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#include <asm/cpu.h>
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#include <asm/io.h>
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#include <asm/vr41xx/vr41xx.h>
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/* VR4111 and VR4121 SIU Registers */
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#define SIURB_TYPE1             KSEG1ADDR(0x0c000000)
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#define SIUIRSEL_TYPE1          KSEG1ADDR(0x0c000008)
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/* VR4122, VR4131 and VR4133 SIU Registers */
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#define SIURB_TYPE2             KSEG1ADDR(0x0f000800)
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#define SIUIRSEL_TYPE2          KSEG1ADDR(0x0f000808)
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 #define USE_RS232C             0x00
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 #define USE_IRDA               0x01
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 #define SIU_USES_IRDA          0x00
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 #define FIR_USES_IRDA          0x02
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 #define IRDA_MODULE_SHARP      0x00
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 #define IRDA_MODULE_TEMIC      0x04
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 #define IRDA_MODULE_HP         0x08
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 #define TMICTX                 0x10
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 #define TMICMODE               0x20
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#define SIU_BASE_BAUD           1152000
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/* VR4122 and VR4131 DSIU Registers */
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#define DSIURB                  KSEG1ADDR(0x0f000820)
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#define MDSIUINTREG             KSEG1ADDR(0x0f000096)
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 #define INTDSIU                0x0800
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#define DSIU_BASE_BAUD          1152000
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int vr41xx_serial_ports = 0;
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void vr41xx_siu_ifselect(int interface, int module)
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{
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        u16 val = USE_RS232C;   /* Select RS-232C */
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        /* Select IrDA */
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        if (interface == SIU_IRDA) {
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                switch (module) {
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                case IRDA_SHARP:
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                        val = IRDA_MODULE_SHARP;
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                        break;
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                case IRDA_TEMIC:
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                        val = IRDA_MODULE_TEMIC;
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                        break;
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                case IRDA_HP:
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                        val = IRDA_MODULE_HP;
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                        break;
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                }
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                val |= USE_IRDA | SIU_USES_IRDA;
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        }
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        switch (current_cpu_data.cputype) {
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        case CPU_VR4111:
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        case CPU_VR4121:
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                writew(val, SIUIRSEL_TYPE1);
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                break;
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        case CPU_VR4122:
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        case CPU_VR4131:
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        case CPU_VR4133:
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                writew(val, SIUIRSEL_TYPE2);
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                break;
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        default:
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                printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n");
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                break;
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        }
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}
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void __init vr41xx_siu_init(int interface, int module)
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{
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        struct serial_struct s;
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        vr41xx_siu_ifselect(interface, module);
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        memset(&s, 0, sizeof(s));
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        s.line = vr41xx_serial_ports;
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        s.baud_base = SIU_BASE_BAUD;
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        s.irq = SIU_IRQ;
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        s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
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        switch (current_cpu_data.cputype) {
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        case CPU_VR4111:
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        case CPU_VR4121:
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                s.iomem_base = (unsigned char *)SIURB_TYPE1;
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                break;
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        case CPU_VR4122:
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        case CPU_VR4131:
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        case CPU_VR4133:
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                s.iomem_base = (unsigned char *)SIURB_TYPE2;
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                break;
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        default:
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                panic("Unexpected CPU of NEC VR4100 series");
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                break;
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        }
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        s.iomem_reg_shift = 0;
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        s.io_type = SERIAL_IO_MEM;
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        if (early_serial_setup(&s) != 0)
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                printk(KERN_ERR "SIU setup failed!\n");
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        vr41xx_clock_supply(SIU_CLOCK);
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        vr41xx_serial_ports++;
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}
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void __init vr41xx_dsiu_init(void)
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{
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        struct serial_struct s;
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        if (current_cpu_data.cputype != CPU_VR4122 &&
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            current_cpu_data.cputype != CPU_VR4131 &&
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            current_cpu_data.cputype != CPU_VR4133)
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                return;
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        memset(&s, 0, sizeof(s));
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        s.line = vr41xx_serial_ports;
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        s.baud_base = DSIU_BASE_BAUD;
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        s.irq = DSIU_IRQ;
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        s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
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        s.iomem_base = (unsigned char *)DSIURB;
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        s.iomem_reg_shift = 0;
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        s.io_type = SERIAL_IO_MEM;
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        if (early_serial_setup(&s) != 0)
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                printk(KERN_ERR "DSIU setup failed!\n");
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        vr41xx_clock_supply(DSIU_CLOCK);
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        writew(INTDSIU, MDSIUINTREG);
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        vr41xx_serial_ports++;
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}

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