1051 строка
22 KiB
C
1051 строка
22 KiB
C
/*
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* Driver for NEC VR4100 series Serial Interface Unit.
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*
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* Copyright (C) 2004-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
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*
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* Based on drivers/serial/8250.c, by Russell King.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/config.h>
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#if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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#define SUPPORT_SYSRQ
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#endif
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#include <linux/console.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/serial_reg.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <asm/io.h>
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#include <asm/vr41xx/siu.h>
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#include <asm/vr41xx/vr41xx.h>
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#define SIU_PORTS_MAX 2
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#define SIU_BAUD_BASE 1152000
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#define SIU_MAJOR 204
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#define SIU_MINOR_BASE 82
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#define RX_MAX_COUNT 256
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#define TX_MAX_COUNT 15
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#define SIUIRSEL 0x08
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#define TMICMODE 0x20
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#define TMICTX 0x10
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#define IRMSEL 0x0c
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#define IRMSEL_HP 0x08
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#define IRMSEL_TEMIC 0x04
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#define IRMSEL_SHARP 0x00
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#define IRUSESEL 0x02
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#define SIRSEL 0x01
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struct siu_port {
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unsigned int type;
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unsigned int irq;
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unsigned long start;
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};
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static const struct siu_port siu_type1_ports[] = {
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{ .type = PORT_VR41XX_SIU,
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.irq = SIU_IRQ,
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.start = 0x0c000000UL, },
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};
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#define SIU_TYPE1_NR_PORTS (sizeof(siu_type1_ports) / sizeof(struct siu_port))
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static const struct siu_port siu_type2_ports[] = {
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{ .type = PORT_VR41XX_SIU,
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.irq = SIU_IRQ,
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.start = 0x0f000800UL, },
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{ .type = PORT_VR41XX_DSIU,
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.irq = DSIU_IRQ,
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.start = 0x0f000820UL, },
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};
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#define SIU_TYPE2_NR_PORTS (sizeof(siu_type2_ports) / sizeof(struct siu_port))
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static struct uart_port siu_uart_ports[SIU_PORTS_MAX];
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static uint8_t lsr_break_flag[SIU_PORTS_MAX];
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#define siu_read(port, offset) readb((port)->membase + (offset))
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#define siu_write(port, offset, value) writeb((value), (port)->membase + (offset))
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void vr41xx_select_siu_interface(siu_interface_t interface)
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{
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struct uart_port *port;
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unsigned long flags;
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uint8_t irsel;
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port = &siu_uart_ports[0];
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spin_lock_irqsave(&port->lock, flags);
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irsel = siu_read(port, SIUIRSEL);
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if (interface == SIU_INTERFACE_IRDA)
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irsel |= SIRSEL;
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else
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irsel &= ~SIRSEL;
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siu_write(port, SIUIRSEL, irsel);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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EXPORT_SYMBOL_GPL(vr41xx_select_siu_interface);
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void vr41xx_use_irda(irda_use_t use)
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{
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struct uart_port *port;
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unsigned long flags;
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uint8_t irsel;
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port = &siu_uart_ports[0];
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spin_lock_irqsave(&port->lock, flags);
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irsel = siu_read(port, SIUIRSEL);
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if (use == FIR_USE_IRDA)
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irsel |= IRUSESEL;
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else
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irsel &= ~IRUSESEL;
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siu_write(port, SIUIRSEL, irsel);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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EXPORT_SYMBOL_GPL(vr41xx_use_irda);
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void vr41xx_select_irda_module(irda_module_t module, irda_speed_t speed)
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{
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struct uart_port *port;
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unsigned long flags;
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uint8_t irsel;
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port = &siu_uart_ports[0];
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spin_lock_irqsave(&port->lock, flags);
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irsel = siu_read(port, SIUIRSEL);
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irsel &= ~(IRMSEL | TMICTX | TMICMODE);
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switch (module) {
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case SHARP_IRDA:
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irsel |= IRMSEL_SHARP;
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break;
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case TEMIC_IRDA:
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irsel |= IRMSEL_TEMIC | TMICMODE;
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if (speed == IRDA_TX_4MBPS)
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irsel |= TMICTX;
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break;
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case HP_IRDA:
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irsel |= IRMSEL_HP;
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break;
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default:
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break;
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}
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siu_write(port, SIUIRSEL, irsel);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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EXPORT_SYMBOL_GPL(vr41xx_select_irda_module);
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static inline void siu_clear_fifo(struct uart_port *port)
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{
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siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO);
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siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
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UART_FCR_CLEAR_XMIT);
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siu_write(port, UART_FCR, 0);
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}
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static inline int siu_probe_ports(void)
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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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return SIU_TYPE1_NR_PORTS;
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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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return SIU_TYPE2_NR_PORTS;
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}
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return 0;
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}
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static inline unsigned long siu_port_size(struct uart_port *port)
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{
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switch (port->type) {
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case PORT_VR41XX_SIU:
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return 11UL;
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case PORT_VR41XX_DSIU:
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return 8UL;
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}
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return 0;
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}
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static inline unsigned int siu_check_type(struct uart_port *port)
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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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if (port->line == 0)
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return PORT_VR41XX_SIU;
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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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if (port->line == 0)
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return PORT_VR41XX_SIU;
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else if (port->line == 1)
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return PORT_VR41XX_DSIU;
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break;
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}
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return PORT_UNKNOWN;
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}
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static inline const char *siu_type_name(struct uart_port *port)
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{
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switch (port->type) {
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case PORT_VR41XX_SIU:
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return "SIU";
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case PORT_VR41XX_DSIU:
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return "DSIU";
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}
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return NULL;
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}
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static unsigned int siu_tx_empty(struct uart_port *port)
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{
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uint8_t lsr;
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lsr = siu_read(port, UART_LSR);
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if (lsr & UART_LSR_TEMT)
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return TIOCSER_TEMT;
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return 0;
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}
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static void siu_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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uint8_t mcr = 0;
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if (mctrl & TIOCM_DTR)
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mcr |= UART_MCR_DTR;
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if (mctrl & TIOCM_RTS)
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mcr |= UART_MCR_RTS;
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if (mctrl & TIOCM_OUT1)
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mcr |= UART_MCR_OUT1;
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if (mctrl & TIOCM_OUT2)
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mcr |= UART_MCR_OUT2;
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if (mctrl & TIOCM_LOOP)
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mcr |= UART_MCR_LOOP;
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siu_write(port, UART_MCR, mcr);
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}
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static unsigned int siu_get_mctrl(struct uart_port *port)
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{
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uint8_t msr;
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unsigned int mctrl = 0;
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msr = siu_read(port, UART_MSR);
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if (msr & UART_MSR_DCD)
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mctrl |= TIOCM_CAR;
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if (msr & UART_MSR_RI)
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mctrl |= TIOCM_RNG;
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if (msr & UART_MSR_DSR)
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mctrl |= TIOCM_DSR;
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if (msr & UART_MSR_CTS)
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mctrl |= TIOCM_CTS;
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return mctrl;
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}
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static void siu_stop_tx(struct uart_port *port)
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{
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unsigned long flags;
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uint8_t ier;
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spin_lock_irqsave(&port->lock, flags);
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ier = siu_read(port, UART_IER);
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ier &= ~UART_IER_THRI;
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siu_write(port, UART_IER, ier);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void siu_start_tx(struct uart_port *port)
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{
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unsigned long flags;
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uint8_t ier;
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spin_lock_irqsave(&port->lock, flags);
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ier = siu_read(port, UART_IER);
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ier |= UART_IER_THRI;
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siu_write(port, UART_IER, ier);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void siu_stop_rx(struct uart_port *port)
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{
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unsigned long flags;
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uint8_t ier;
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spin_lock_irqsave(&port->lock, flags);
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ier = siu_read(port, UART_IER);
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ier &= ~UART_IER_RLSI;
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siu_write(port, UART_IER, ier);
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port->read_status_mask &= ~UART_LSR_DR;
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void siu_enable_ms(struct uart_port *port)
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{
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unsigned long flags;
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uint8_t ier;
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spin_lock_irqsave(&port->lock, flags);
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ier = siu_read(port, UART_IER);
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ier |= UART_IER_MSI;
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siu_write(port, UART_IER, ier);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void siu_break_ctl(struct uart_port *port, int ctl)
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{
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unsigned long flags;
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uint8_t lcr;
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spin_lock_irqsave(&port->lock, flags);
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lcr = siu_read(port, UART_LCR);
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if (ctl == -1)
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lcr |= UART_LCR_SBC;
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else
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lcr &= ~UART_LCR_SBC;
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siu_write(port, UART_LCR, lcr);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static inline void receive_chars(struct uart_port *port, uint8_t *status,
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struct pt_regs *regs)
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{
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struct tty_struct *tty;
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uint8_t lsr, ch;
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char flag;
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int max_count = RX_MAX_COUNT;
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tty = port->info->tty;
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lsr = *status;
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do {
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if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
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if (tty->low_latency)
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tty_flip_buffer_push(tty);
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}
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ch = siu_read(port, UART_RX);
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port->icount.rx++;
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flag = TTY_NORMAL;
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#ifdef CONFIG_SERIAL_VR41XX_CONSOLE
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lsr |= lsr_break_flag[port->line];
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lsr_break_flag[port->line] = 0;
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#endif
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if (unlikely(lsr & (UART_LSR_BI | UART_LSR_FE |
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UART_LSR_PE | UART_LSR_OE))) {
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if (lsr & UART_LSR_BI) {
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lsr &= ~(UART_LSR_FE | UART_LSR_PE);
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port->icount.brk++;
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if (uart_handle_break(port))
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goto ignore_char;
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}
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if (lsr & UART_LSR_FE)
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port->icount.frame++;
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if (lsr & UART_LSR_PE)
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port->icount.parity++;
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if (lsr & UART_LSR_OE)
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port->icount.overrun++;
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lsr &= port->read_status_mask;
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if (lsr & UART_LSR_BI)
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flag = TTY_BREAK;
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if (lsr & UART_LSR_FE)
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flag = TTY_FRAME;
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if (lsr & UART_LSR_PE)
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flag = TTY_PARITY;
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}
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if (uart_handle_sysrq_char(port, ch, regs))
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goto ignore_char;
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uart_insert_char(port, lsr, UART_LSR_OE, ch, flag);
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ignore_char:
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lsr = siu_read(port, UART_LSR);
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} while ((lsr & UART_LSR_DR) && (max_count-- > 0));
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tty_flip_buffer_push(tty);
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*status = lsr;
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}
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static inline void check_modem_status(struct uart_port *port)
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{
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uint8_t msr;
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msr = siu_read(port, UART_MSR);
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if ((msr & UART_MSR_ANY_DELTA) == 0)
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return;
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if (msr & UART_MSR_DDCD)
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uart_handle_dcd_change(port, msr & UART_MSR_DCD);
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if (msr & UART_MSR_TERI)
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port->icount.rng++;
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if (msr & UART_MSR_DDSR)
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port->icount.dsr++;
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if (msr & UART_MSR_DCTS)
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uart_handle_cts_change(port, msr & UART_MSR_CTS);
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wake_up_interruptible(&port->info->delta_msr_wait);
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}
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static inline void transmit_chars(struct uart_port *port)
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{
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struct circ_buf *xmit;
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int max_count = TX_MAX_COUNT;
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xmit = &port->info->xmit;
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if (port->x_char) {
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siu_write(port, UART_TX, port->x_char);
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port->icount.tx++;
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port->x_char = 0;
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return;
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}
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if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
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siu_stop_tx(port);
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return;
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}
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do {
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siu_write(port, UART_TX, xmit->buf[xmit->tail]);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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port->icount.tx++;
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if (uart_circ_empty(xmit))
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break;
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} while (max_count-- > 0);
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(port);
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if (uart_circ_empty(xmit))
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siu_stop_tx(port);
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}
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static irqreturn_t siu_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct uart_port *port;
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uint8_t iir, lsr;
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port = (struct uart_port *)dev_id;
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iir = siu_read(port, UART_IIR);
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if (iir & UART_IIR_NO_INT)
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return IRQ_NONE;
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lsr = siu_read(port, UART_LSR);
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if (lsr & UART_LSR_DR)
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receive_chars(port, &lsr, regs);
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check_modem_status(port);
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if (lsr & UART_LSR_THRE)
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transmit_chars(port);
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return IRQ_HANDLED;
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}
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static int siu_startup(struct uart_port *port)
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{
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int retval;
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if (port->membase == NULL)
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return -ENODEV;
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siu_clear_fifo(port);
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(void)siu_read(port, UART_LSR);
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(void)siu_read(port, UART_RX);
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(void)siu_read(port, UART_IIR);
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(void)siu_read(port, UART_MSR);
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if (siu_read(port, UART_LSR) == 0xff)
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return -ENODEV;
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retval = request_irq(port->irq, siu_interrupt, 0, siu_type_name(port), port);
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if (retval)
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return retval;
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if (port->type == PORT_VR41XX_DSIU)
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vr41xx_enable_dsiuint(DSIUINT_ALL);
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siu_write(port, UART_LCR, UART_LCR_WLEN8);
|
|
|
|
spin_lock_irq(&port->lock);
|
|
siu_set_mctrl(port, port->mctrl);
|
|
spin_unlock_irq(&port->lock);
|
|
|
|
siu_write(port, UART_IER, UART_IER_RLSI | UART_IER_RDI);
|
|
|
|
(void)siu_read(port, UART_LSR);
|
|
(void)siu_read(port, UART_RX);
|
|
(void)siu_read(port, UART_IIR);
|
|
(void)siu_read(port, UART_MSR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void siu_shutdown(struct uart_port *port)
|
|
{
|
|
unsigned long flags;
|
|
uint8_t lcr;
|
|
|
|
siu_write(port, UART_IER, 0);
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
port->mctrl &= ~TIOCM_OUT2;
|
|
siu_set_mctrl(port, port->mctrl);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
lcr = siu_read(port, UART_LCR);
|
|
lcr &= ~UART_LCR_SBC;
|
|
siu_write(port, UART_LCR, lcr);
|
|
|
|
siu_clear_fifo(port);
|
|
|
|
(void)siu_read(port, UART_RX);
|
|
|
|
if (port->type == PORT_VR41XX_DSIU)
|
|
vr41xx_disable_dsiuint(DSIUINT_ALL);
|
|
|
|
free_irq(port->irq, port);
|
|
}
|
|
|
|
static void siu_set_termios(struct uart_port *port, struct termios *new,
|
|
struct termios *old)
|
|
{
|
|
tcflag_t c_cflag, c_iflag;
|
|
uint8_t lcr, fcr, ier;
|
|
unsigned int baud, quot;
|
|
unsigned long flags;
|
|
|
|
c_cflag = new->c_cflag;
|
|
switch (c_cflag & CSIZE) {
|
|
case CS5:
|
|
lcr = UART_LCR_WLEN5;
|
|
break;
|
|
case CS6:
|
|
lcr = UART_LCR_WLEN6;
|
|
break;
|
|
case CS7:
|
|
lcr = UART_LCR_WLEN7;
|
|
break;
|
|
default:
|
|
lcr = UART_LCR_WLEN8;
|
|
break;
|
|
}
|
|
|
|
if (c_cflag & CSTOPB)
|
|
lcr |= UART_LCR_STOP;
|
|
if (c_cflag & PARENB)
|
|
lcr |= UART_LCR_PARITY;
|
|
if ((c_cflag & PARODD) != PARODD)
|
|
lcr |= UART_LCR_EPAR;
|
|
if (c_cflag & CMSPAR)
|
|
lcr |= UART_LCR_SPAR;
|
|
|
|
baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16);
|
|
quot = uart_get_divisor(port, baud);
|
|
|
|
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
uart_update_timeout(port, c_cflag, baud);
|
|
|
|
c_iflag = new->c_iflag;
|
|
|
|
port->read_status_mask = UART_LSR_THRE | UART_LSR_OE | UART_LSR_DR;
|
|
if (c_iflag & INPCK)
|
|
port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
|
|
if (c_iflag & (BRKINT | PARMRK))
|
|
port->read_status_mask |= UART_LSR_BI;
|
|
|
|
port->ignore_status_mask = 0;
|
|
if (c_iflag & IGNPAR)
|
|
port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE;
|
|
if (c_iflag & IGNBRK) {
|
|
port->ignore_status_mask |= UART_LSR_BI;
|
|
if (c_iflag & IGNPAR)
|
|
port->ignore_status_mask |= UART_LSR_OE;
|
|
}
|
|
|
|
if ((c_cflag & CREAD) == 0)
|
|
port->ignore_status_mask |= UART_LSR_DR;
|
|
|
|
ier = siu_read(port, UART_IER);
|
|
ier &= ~UART_IER_MSI;
|
|
if (UART_ENABLE_MS(port, c_cflag))
|
|
ier |= UART_IER_MSI;
|
|
siu_write(port, UART_IER, ier);
|
|
|
|
siu_write(port, UART_LCR, lcr | UART_LCR_DLAB);
|
|
|
|
siu_write(port, UART_DLL, (uint8_t)quot);
|
|
siu_write(port, UART_DLM, (uint8_t)(quot >> 8));
|
|
|
|
siu_write(port, UART_LCR, lcr);
|
|
|
|
siu_write(port, UART_FCR, fcr);
|
|
|
|
siu_set_mctrl(port, port->mctrl);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
static void siu_pm(struct uart_port *port, unsigned int state, unsigned int oldstate)
|
|
{
|
|
switch (state) {
|
|
case 0:
|
|
switch (port->type) {
|
|
case PORT_VR41XX_SIU:
|
|
vr41xx_supply_clock(SIU_CLOCK);
|
|
break;
|
|
case PORT_VR41XX_DSIU:
|
|
vr41xx_supply_clock(DSIU_CLOCK);
|
|
break;
|
|
}
|
|
break;
|
|
case 3:
|
|
switch (port->type) {
|
|
case PORT_VR41XX_SIU:
|
|
vr41xx_mask_clock(SIU_CLOCK);
|
|
break;
|
|
case PORT_VR41XX_DSIU:
|
|
vr41xx_mask_clock(DSIU_CLOCK);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const char *siu_type(struct uart_port *port)
|
|
{
|
|
return siu_type_name(port);
|
|
}
|
|
|
|
static void siu_release_port(struct uart_port *port)
|
|
{
|
|
unsigned long size;
|
|
|
|
if (port->flags & UPF_IOREMAP) {
|
|
iounmap(port->membase);
|
|
port->membase = NULL;
|
|
}
|
|
|
|
size = siu_port_size(port);
|
|
release_mem_region(port->mapbase, size);
|
|
}
|
|
|
|
static int siu_request_port(struct uart_port *port)
|
|
{
|
|
unsigned long size;
|
|
struct resource *res;
|
|
|
|
size = siu_port_size(port);
|
|
res = request_mem_region(port->mapbase, size, siu_type_name(port));
|
|
if (res == NULL)
|
|
return -EBUSY;
|
|
|
|
if (port->flags & UPF_IOREMAP) {
|
|
port->membase = ioremap(port->mapbase, size);
|
|
if (port->membase == NULL) {
|
|
release_resource(res);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void siu_config_port(struct uart_port *port, int flags)
|
|
{
|
|
if (flags & UART_CONFIG_TYPE) {
|
|
port->type = siu_check_type(port);
|
|
(void)siu_request_port(port);
|
|
}
|
|
}
|
|
|
|
static int siu_verify_port(struct uart_port *port, struct serial_struct *serial)
|
|
{
|
|
if (port->type != PORT_VR41XX_SIU && port->type != PORT_VR41XX_DSIU)
|
|
return -EINVAL;
|
|
if (port->irq != serial->irq)
|
|
return -EINVAL;
|
|
if (port->iotype != serial->io_type)
|
|
return -EINVAL;
|
|
if (port->mapbase != (unsigned long)serial->iomem_base)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct uart_ops siu_uart_ops = {
|
|
.tx_empty = siu_tx_empty,
|
|
.set_mctrl = siu_set_mctrl,
|
|
.get_mctrl = siu_get_mctrl,
|
|
.stop_tx = siu_stop_tx,
|
|
.start_tx = siu_start_tx,
|
|
.stop_rx = siu_stop_rx,
|
|
.enable_ms = siu_enable_ms,
|
|
.break_ctl = siu_break_ctl,
|
|
.startup = siu_startup,
|
|
.shutdown = siu_shutdown,
|
|
.set_termios = siu_set_termios,
|
|
.pm = siu_pm,
|
|
.type = siu_type,
|
|
.release_port = siu_release_port,
|
|
.request_port = siu_request_port,
|
|
.config_port = siu_config_port,
|
|
.verify_port = siu_verify_port,
|
|
};
|
|
|
|
static int siu_init_ports(void)
|
|
{
|
|
const struct siu_port *siu;
|
|
struct uart_port *port;
|
|
int i, num;
|
|
|
|
switch (current_cpu_data.cputype) {
|
|
case CPU_VR4111:
|
|
case CPU_VR4121:
|
|
siu = siu_type1_ports;
|
|
break;
|
|
case CPU_VR4122:
|
|
case CPU_VR4131:
|
|
case CPU_VR4133:
|
|
siu = siu_type2_ports;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
port = siu_uart_ports;
|
|
num = siu_probe_ports();
|
|
for (i = 0; i < num; i++) {
|
|
spin_lock_init(&port->lock);
|
|
port->irq = siu->irq;
|
|
port->uartclk = SIU_BAUD_BASE * 16;
|
|
port->fifosize = 16;
|
|
port->regshift = 0;
|
|
port->iotype = UPIO_MEM;
|
|
port->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
|
|
port->type = siu->type;
|
|
port->line = i;
|
|
port->mapbase = siu->start;
|
|
siu++;
|
|
port++;
|
|
}
|
|
|
|
return num;
|
|
}
|
|
|
|
#ifdef CONFIG_SERIAL_VR41XX_CONSOLE
|
|
|
|
#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
|
|
|
|
static void wait_for_xmitr(struct uart_port *port)
|
|
{
|
|
int timeout = 10000;
|
|
uint8_t lsr, msr;
|
|
|
|
do {
|
|
lsr = siu_read(port, UART_LSR);
|
|
if (lsr & UART_LSR_BI)
|
|
lsr_break_flag[port->line] = UART_LSR_BI;
|
|
|
|
if ((lsr & BOTH_EMPTY) == BOTH_EMPTY)
|
|
break;
|
|
} while (timeout-- > 0);
|
|
|
|
if (port->flags & UPF_CONS_FLOW) {
|
|
timeout = 1000000;
|
|
|
|
do {
|
|
msr = siu_read(port, UART_MSR);
|
|
if ((msr & UART_MSR_CTS) != 0)
|
|
break;
|
|
} while (timeout-- > 0);
|
|
}
|
|
}
|
|
|
|
static void siu_console_write(struct console *con, const char *s, unsigned count)
|
|
{
|
|
struct uart_port *port;
|
|
uint8_t ier;
|
|
unsigned i;
|
|
|
|
port = &siu_uart_ports[con->index];
|
|
|
|
ier = siu_read(port, UART_IER);
|
|
siu_write(port, UART_IER, 0);
|
|
|
|
for (i = 0; i < count && *s != '\0'; i++, s++) {
|
|
wait_for_xmitr(port);
|
|
siu_write(port, UART_TX, *s);
|
|
if (*s == '\n') {
|
|
wait_for_xmitr(port);
|
|
siu_write(port, UART_TX, '\r');
|
|
}
|
|
}
|
|
|
|
wait_for_xmitr(port);
|
|
siu_write(port, UART_IER, ier);
|
|
}
|
|
|
|
static int siu_console_setup(struct console *con, char *options)
|
|
{
|
|
struct uart_port *port;
|
|
int baud = 9600;
|
|
int parity = 'n';
|
|
int bits = 8;
|
|
int flow = 'n';
|
|
|
|
if (con->index >= SIU_PORTS_MAX)
|
|
con->index = 0;
|
|
|
|
port = &siu_uart_ports[con->index];
|
|
if (port->membase == NULL) {
|
|
if (port->mapbase == 0)
|
|
return -ENODEV;
|
|
port->membase = ioremap(port->mapbase, siu_port_size(port));
|
|
}
|
|
|
|
vr41xx_select_siu_interface(SIU_INTERFACE_RS232C);
|
|
|
|
if (options != NULL)
|
|
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
|
|
|
return uart_set_options(port, con, baud, parity, bits, flow);
|
|
}
|
|
|
|
static struct uart_driver siu_uart_driver;
|
|
|
|
static struct console siu_console = {
|
|
.name = "ttyVR",
|
|
.write = siu_console_write,
|
|
.device = uart_console_device,
|
|
.setup = siu_console_setup,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
.data = &siu_uart_driver,
|
|
};
|
|
|
|
static int __devinit siu_console_init(void)
|
|
{
|
|
struct uart_port *port;
|
|
int num, i;
|
|
|
|
num = siu_init_ports();
|
|
if (num <= 0)
|
|
return -ENODEV;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
port = &siu_uart_ports[i];
|
|
port->ops = &siu_uart_ops;
|
|
}
|
|
|
|
register_console(&siu_console);
|
|
|
|
return 0;
|
|
}
|
|
|
|
console_initcall(siu_console_init);
|
|
|
|
#define SERIAL_VR41XX_CONSOLE &siu_console
|
|
#else
|
|
#define SERIAL_VR41XX_CONSOLE NULL
|
|
#endif
|
|
|
|
static struct uart_driver siu_uart_driver = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "SIU",
|
|
.dev_name = "ttyVR",
|
|
.devfs_name = "ttvr/",
|
|
.major = SIU_MAJOR,
|
|
.minor = SIU_MINOR_BASE,
|
|
.cons = SERIAL_VR41XX_CONSOLE,
|
|
};
|
|
|
|
static int siu_probe(struct device *dev)
|
|
{
|
|
struct uart_port *port;
|
|
int num, i, retval;
|
|
|
|
num = siu_init_ports();
|
|
if (num <= 0)
|
|
return -ENODEV;
|
|
|
|
siu_uart_driver.nr = num;
|
|
retval = uart_register_driver(&siu_uart_driver);
|
|
if (retval)
|
|
return retval;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
port = &siu_uart_ports[i];
|
|
port->ops = &siu_uart_ops;
|
|
port->dev = dev;
|
|
|
|
retval = uart_add_one_port(&siu_uart_driver, port);
|
|
if (retval < 0) {
|
|
port->dev = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == 0 && retval < 0) {
|
|
uart_unregister_driver(&siu_uart_driver);
|
|
return retval;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int siu_remove(struct device *dev)
|
|
{
|
|
struct uart_port *port;
|
|
int i;
|
|
|
|
for (i = 0; i < siu_uart_driver.nr; i++) {
|
|
port = &siu_uart_ports[i];
|
|
if (port->dev == dev) {
|
|
uart_remove_one_port(&siu_uart_driver, port);
|
|
port->dev = NULL;
|
|
}
|
|
}
|
|
|
|
uart_unregister_driver(&siu_uart_driver);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int siu_suspend(struct device *dev, pm_message_t state, u32 level)
|
|
{
|
|
struct uart_port *port;
|
|
int i;
|
|
|
|
if (level != SUSPEND_DISABLE)
|
|
return 0;
|
|
|
|
for (i = 0; i < siu_uart_driver.nr; i++) {
|
|
port = &siu_uart_ports[i];
|
|
if ((port->type == PORT_VR41XX_SIU ||
|
|
port->type == PORT_VR41XX_DSIU) && port->dev == dev)
|
|
uart_suspend_port(&siu_uart_driver, port);
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int siu_resume(struct device *dev, u32 level)
|
|
{
|
|
struct uart_port *port;
|
|
int i;
|
|
|
|
if (level != RESUME_ENABLE)
|
|
return 0;
|
|
|
|
for (i = 0; i < siu_uart_driver.nr; i++) {
|
|
port = &siu_uart_ports[i];
|
|
if ((port->type == PORT_VR41XX_SIU ||
|
|
port->type == PORT_VR41XX_DSIU) && port->dev == dev)
|
|
uart_resume_port(&siu_uart_driver, port);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_device *siu_platform_device;
|
|
|
|
static struct device_driver siu_device_driver = {
|
|
.name = "SIU",
|
|
.bus = &platform_bus_type,
|
|
.probe = siu_probe,
|
|
.remove = siu_remove,
|
|
.suspend = siu_suspend,
|
|
.resume = siu_resume,
|
|
};
|
|
|
|
static int __devinit vr41xx_siu_init(void)
|
|
{
|
|
int retval;
|
|
|
|
siu_platform_device = platform_device_register_simple("SIU", -1, NULL, 0);
|
|
if (IS_ERR(siu_platform_device))
|
|
return PTR_ERR(siu_platform_device);
|
|
|
|
retval = driver_register(&siu_device_driver);
|
|
if (retval < 0)
|
|
platform_device_unregister(siu_platform_device);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void __devexit vr41xx_siu_exit(void)
|
|
{
|
|
driver_unregister(&siu_device_driver);
|
|
|
|
platform_device_unregister(siu_platform_device);
|
|
}
|
|
|
|
module_init(vr41xx_siu_init);
|
|
module_exit(vr41xx_siu_exit);
|