| /* |
| * 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> |
| * - New creation, NEC VR4122 and VR4131 are supported. |
| * - Added support for NEC VR4111 and VR4121. |
| * |
| * Yoichi Yuasa <yuasa@hh.iij4u.or.jp> |
| * - Added support for NEC VR4133. |
| */ |
| #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 SIURB_TYPE1 KSEG1ADDR(0x0c000000) |
| #define SIUIRSEL_TYPE1 KSEG1ADDR(0x0c000008) |
| |
| /* VR4122, VR4131 and VR4133 SIU Registers */ |
| #define SIURB_TYPE2 KSEG1ADDR(0x0f000800) |
| #define SIUIRSEL_TYPE2 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 |
| |
| /* VR4122 and VR4131 DSIU Registers */ |
| #define DSIURB KSEG1ADDR(0x0f000820) |
| |
| #define MDSIUINTREG KSEG1ADDR(0x0f000096) |
| #define INTDSIU 0x0800 |
| |
| #define DSIU_BASE_BAUD 1152000 |
| |
| 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 (current_cpu_data.cputype) { |
| case CPU_VR4111: |
| case CPU_VR4121: |
| writew(val, SIUIRSEL_TYPE1); |
| break; |
| case CPU_VR4122: |
| case CPU_VR4131: |
| case CPU_VR4133: |
| writew(val, SIUIRSEL_TYPE2); |
| 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 (current_cpu_data.cputype) { |
| case CPU_VR4111: |
| case CPU_VR4121: |
| s.iomem_base = (unsigned char *)SIURB_TYPE1; |
| break; |
| case CPU_VR4122: |
| case CPU_VR4131: |
| case CPU_VR4133: |
| s.iomem_base = (unsigned char *)SIURB_TYPE2; |
| 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_supply_clock(SIU_CLOCK); |
| |
| vr41xx_serial_ports++; |
| } |
| |
| void __init vr41xx_dsiu_init(void) |
| { |
| struct serial_struct s; |
| |
| if (current_cpu_data.cputype != CPU_VR4122 && |
| current_cpu_data.cputype != CPU_VR4131 && |
| current_cpu_data.cputype != CPU_VR4133) |
| 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_supply_clock(DSIU_CLOCK); |
| |
| writew(INTDSIU, MDSIUINTREG); |
| |
| vr41xx_serial_ports++; |
| } |