756 lines
18 KiB
C
756 lines
18 KiB
C
/*
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* linux/drivers/char/amazon_asc.c
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*
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* Driver for AMAZONASC serial ports
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*
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* Copyright (C) 2004 Infineon IFAP DC COM CPE
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* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
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*
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* Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
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* Based on drivers/serial/serial_s3c2400.c
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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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* $Id: amazon_asc.c,v 1.2 2005/04/01 02:40:48 pliu Exp $
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*
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* This is a generic driver for AMAZONASC-type serial ports.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/fcntl.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/circ_buf.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/console.h>
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#include <linux/sysrq.h>
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#include <linux/irq.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/bitops.h>
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#include <asm/amazon/amazon.h>
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#include <asm/amazon/irq.h>
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#include <asm/amazon/serial.h>
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#define PORT_AMAZONASC 111
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#if defined(CONFIG_SERIAL_AMAZONASC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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#define SUPPORT_SYSRQ
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#endif
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#include <linux/serial_core.h>
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#define UART_NR 1
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#define SERIAL_AMAZONASC_MAJOR TTY_MAJOR
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#define CALLOUT_AMAZONASC_MAJOR TTYAUX_MAJOR
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#define SERIAL_AMAZONASC_MINOR 64
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#define SERIAL_AMAZONASC_NR UART_NR
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extern void prom_printf(const char * fmt, ...);
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static struct uart_port amazonasc_ports[UART_NR];
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static struct uart_driver amazonasc_reg;
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#ifdef CONFIG_SERIAL_AMAZONASC_CONSOLE /*SUPPORT_SYSRQ*/
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static struct console amazonasc_console;
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#endif
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static unsigned int uartclk = 0;
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#define SET_BIT(reg, mask) *reg |= (mask)
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#define CLEAR_BIT(reg, mask) *reg &= (~mask)
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#define CLEAR_BITS(reg, mask) CLEAR_BIT(reg, mask)
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#define SET_BITS(reg, mask) SET_BIT(reg, mask)
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#define SET_BITFIELD(reg, mask, off, val) \
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{*reg &= (~mask); *reg |= (val << off);}
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static void amazonasc_tx_chars(struct uart_port *port);
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/* fake flag to indicate CREAD was not set -> throw away all bytes */
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#define UART_DUMMY_UER_RX 1
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/* macro to set the bit corresponding to an interrupt number */
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#define BIT_NO(irq) (1 << (irq - 64))
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#define SERIAL_DEBUG
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extern unsigned int amazon_get_fpi_hz(void);
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static int tx_enabled = 0;
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static void amazonasc_stop_tx(struct uart_port *port)
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{
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/* fifo underrun shuts up after firing once */
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return;
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}
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static void amazonasc_start_tx(struct uart_port *port)
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{
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unsigned long flags;
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local_irq_save(flags);
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amazonasc_tx_chars(port);
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local_irq_restore(flags);
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return;
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}
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static void amazonasc_stop_rx(struct uart_port *port)
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{
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/* clear the RX enable bit */
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*AMAZON_ASC_WHBCON = ASCWHBCON_CLRREN;
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}
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static void amazonasc_enable_ms(struct uart_port *port)
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{
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/* no modem signals */
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return;
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}
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static void
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amazonasc_rx_chars(struct uart_port *port)
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{
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struct tty_struct *tty = port->info->tty;
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unsigned int ch = 0, rsr = 0, fifocnt;
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unsigned long flags;
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fifocnt = *AMAZON_ASC_FSTAT & ASCFSTAT_RXFFLMASK;
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while (fifocnt--)
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{
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u8 flag = TTY_NORMAL;
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ch = *AMAZON_ASC_RBUF;
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rsr = (*AMAZON_ASC_CON & ASCCON_ANY) | UART_DUMMY_UER_RX;
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tty_flip_buffer_push(tty);
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port->icount.rx++;
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/*
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* Note that the error handling code is
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* out of the main execution path
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*/
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if (rsr & ASCCON_ANY) {
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if (rsr & ASCCON_PE) {
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port->icount.parity++;
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE);
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} else if (rsr & ASCCON_FE) {
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port->icount.frame++;
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE);
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}
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if (rsr & ASCCON_OE) {
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port->icount.overrun++;
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE);
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}
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rsr &= port->read_status_mask;
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if (rsr & ASCCON_PE)
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flag = TTY_PARITY;
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else if (rsr & ASCCON_FE)
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flag = TTY_FRAME;
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}
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if ((rsr & port->ignore_status_mask) == 0)
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tty_insert_flip_char(tty, ch, flag);
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if (rsr & ASCCON_OE)
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/*
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* Overrun is special, since it's reported
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* immediately, and doesn't affect the current
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* character
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*/
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tty_insert_flip_char(tty, 0, TTY_OVERRUN);
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}
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if (ch != 0)
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tty_flip_buffer_push(tty);
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return;
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}
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static void amazonasc_tx_chars(struct uart_port *port)
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{
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struct circ_buf *xmit = &port->info->xmit;
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if (uart_tx_stopped(port)) {
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amazonasc_stop_tx(port);
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return;
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}
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while (((*AMAZON_ASC_FSTAT & ASCFSTAT_TXFFLMASK)
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>> ASCFSTAT_TXFFLOFF) != AMAZONASC_TXFIFO_FULL)
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{
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if (port->x_char) {
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*AMAZON_ASC_TBUF = port->x_char;
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port->icount.tx++;
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port->x_char = 0;
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continue;
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}
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if (uart_circ_empty(xmit))
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break;
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*AMAZON_ASC_TBUF = 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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}
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(port);
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}
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static irqreturn_t amazonasc_tx_int(int irq, void *port)
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{
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*(AMAZON_ASC_IRNCR1) = ASC_IRNCR_TIR;
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amazonasc_start_tx(port);
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/* clear any pending interrupts */
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE);
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE);
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE);
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return IRQ_HANDLED;
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}
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static irqreturn_t amazonasc_er_int(int irq, void *port)
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{
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/* clear any pending interrupts */
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRPE);
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLRFE);
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SET_BIT(AMAZON_ASC_WHBCON, ASCWHBCON_CLROE);
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return IRQ_HANDLED;
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}
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static irqreturn_t amazonasc_rx_int(int irq, void *port)
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{
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*(AMAZON_ASC_IRNCR1) = ASC_IRNCR_RIR;
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amazonasc_rx_chars((struct uart_port *) port);
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return IRQ_HANDLED;
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}
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static u_int amazonasc_tx_empty(struct uart_port *port)
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{
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int status;
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/*
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* FSTAT tells exactly how many bytes are in the FIFO.
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* The question is whether we really need to wait for all
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* 16 bytes to be transmitted before reporting that the
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* transmitter is empty.
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*/
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status = *AMAZON_ASC_FSTAT & ASCFSTAT_TXFFLMASK;
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return status ? 0 : TIOCSER_TEMT;
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}
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static u_int amazonasc_get_mctrl(struct uart_port *port)
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{
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/* no modem control signals - the readme says to pretend all are set */
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return TIOCM_CTS|TIOCM_CAR|TIOCM_DSR;
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}
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static void amazonasc_set_mctrl(struct uart_port *port, u_int mctrl)
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{
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/* no modem control - just return */
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return;
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}
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static void amazonasc_break_ctl(struct uart_port *port, int break_state)
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{
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/* no way to send a break */
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return;
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}
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static int amazonasc_startup(struct uart_port *port)
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{
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unsigned int con = 0;
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unsigned long flags;
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int retval;
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/* this assumes: CON.BRS = CON.FDE = 0 */
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if (uartclk == 0)
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uartclk = amazon_get_fpi_hz();
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amazonasc_ports[0].uartclk = uartclk;
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/* block the IRQs */
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local_irq_save(flags);
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/* this setup was probably already done in u-boot */
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/* ASC and GPIO Port 1 bits 3 and 4 share the same pins
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* P1.3 (RX) in, Alternate 10
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* P1.4 (TX) in, Alternate 10
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*/
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SET_BITFIELD((AMAZON_GPIO_P1_DIR), 0x8, 4, 1); //P1.4 output, P1.3 input
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SET_BIT((AMAZON_GPIO_P1_ALTSEL0), 0x18); //ALTSETL0 11
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CLEAR_BIT((AMAZON_GPIO_P1_ALTSEL1), 0x18); //ALTSETL1 00
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SET_BITFIELD((AMAZON_GPIO_P1_OD), 0x8, 4, 1);
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/* set up the CLC */
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CLEAR_BIT(AMAZON_ASC_CLC, AMAZON_ASC_CLC_DISS);
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SET_BITFIELD(AMAZON_ASC_CLC, ASCCLC_RMCMASK, ASCCLC_RMCOFFSET, 1);
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/* asynchronous mode */
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con = ASCCON_M_8ASYNC;
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/* set error signals - framing and overrun */
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con |= ASCCON_FEN;
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con |= ASCCON_OEN;
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con |= ASCCON_PEN;
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/* choose the line - there's only one */
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*AMAZON_ASC_PISEL = 0;
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#if 1
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*AMAZON_ASC_TXFCON = (((AMAZONASC_TXFIFO_FL<<ASCTXFCON_TXFITLOFF)&ASCTXFCON_TXFITLMASK) | ASCTXFCON_TXFEN |ASCTXFCON_TXFFLU);
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*AMAZON_ASC_RXFCON = (((AMAZONASC_RXFIFO_FL<<ASCRXFCON_RXFITLOFF)&ASCRXFCON_RXFITLMASK) | ASCRXFCON_RXFEN |ASCRXFCON_RXFFLU);
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wmb();
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#else
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/* TXFIFO's fill level */
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SET_BITFIELD(AMAZON_ASC_TXFCON, ASCTXFCON_TXFITLMASK,
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ASCTXFCON_TXFITLOFF, AMAZONASC_TXFIFO_FL);
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/* enable TXFIFO */
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SET_BIT(AMAZON_ASC_TXFCON, ASCTXFCON_TXFEN);
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/* RXFIFO's fill level */
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SET_BITFIELD(AMAZON_ASC_RXFCON, ASCRXFCON_RXFITLMASK,
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ASCRXFCON_RXFITLOFF, AMAZONASC_RXFIFO_FL);
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/* enable RXFIFO */
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SET_BIT(AMAZON_ASC_RXFCON, ASCRXFCON_RXFEN);
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/* now really set CON */
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#endif
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SET_BIT(AMAZON_ASC_CON,con);
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/*
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* Allocate the IRQs
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*/
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retval = request_irq(AMAZONASC_RIR, amazonasc_rx_int, 0, "asc_rx", port);
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if (retval){
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printk("-------req1 failed\n");
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return retval;
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}
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retval = request_irq(AMAZONASC_TIR, amazonasc_tx_int, 0, "asc_tx", port);
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if (retval){
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printk("----------req2 failed\n");
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goto err1;
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}
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retval = request_irq(AMAZONASC_EIR, amazonasc_er_int, 0, "asc_er", port);
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if (retval){
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printk("---------req3 failed\n");
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goto err2;
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}
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/* unblock the IRQs */
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local_irq_restore(flags);
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return 0;
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err2:
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free_irq(AMAZONASC_TIR, port);
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err1:
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free_irq(AMAZONASC_RIR, port);
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local_irq_restore(flags);
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return retval;
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}
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static void amazonasc_shutdown(struct uart_port *port)
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{
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/*
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* Free the interrupts
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*/
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free_irq(AMAZONASC_RIR, port);
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free_irq(AMAZONASC_TIR, port);
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free_irq(AMAZONASC_EIR, port);
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/*
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* disable the baudrate generator to disable the ASC
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*/
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*AMAZON_ASC_CON = 0;
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/* flush and then disable the fifos */
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SET_BIT(AMAZON_ASC_RXFCON, ASCRXFCON_RXFFLU);
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CLEAR_BIT(AMAZON_ASC_RXFCON, ASCRXFCON_RXFEN);
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SET_BIT(AMAZON_ASC_TXFCON, ASCTXFCON_TXFFLU);
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CLEAR_BIT(AMAZON_ASC_TXFCON, ASCTXFCON_TXFEN);
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}
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static void amazonasc_set_termios(struct uart_port *port, struct ktermios *new, struct ktermios *old)
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{
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unsigned int cflag;
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unsigned int iflag;
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unsigned int baud, quot;
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unsigned int con = 0;
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unsigned long flags;
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cflag = new->c_cflag;
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iflag = new->c_iflag;
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/* byte size and parity */
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switch (cflag & CSIZE) {
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/* 7 bits are always with parity */
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case CS7: con = ASCCON_M_7ASYNCPAR; break;
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/* the ASC only suports 7 and 8 bits */
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case CS5:
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case CS6:
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default:
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if (cflag & PARENB)
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con = ASCCON_M_8ASYNCPAR;
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else
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con = ASCCON_M_8ASYNC;
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break;
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}
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if (cflag & CSTOPB)
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con |= ASCCON_STP;
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if (cflag & PARENB) {
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if (!(cflag & PARODD))
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con &= ~ASCCON_ODD;
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else
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con |= ASCCON_ODD;
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}
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port->read_status_mask = ASCCON_OE;
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if (iflag & INPCK)
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port->read_status_mask |= ASCCON_FE | ASCCON_PE;
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/* the ASC can't really detect or generate a BREAK */
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#if 0
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if (iflag & (BRKINT | PARMRK))
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port->read_status_mask |= UERSTAT_BREAK;
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#endif
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/*
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* Characters to ignore
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*/
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port->ignore_status_mask = 0;
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if (iflag & IGNPAR)
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port->ignore_status_mask |= ASCCON_FE | ASCCON_PE;
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#if 0
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/* always ignore breaks - the ASC can't handle them XXXX */
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port->ignore_status_mask |= UERSTAT_BREAK;
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#endif
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if (iflag & IGNBRK) {
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/*port->ignore_status_mask |= UERSTAT_BREAK;*/
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/*
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* If we're ignoring parity and break indicators,
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* ignore overruns too (for real raw support).
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*/
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if (iflag & IGNPAR)
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port->ignore_status_mask |= ASCCON_OE;
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}
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/*
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* Ignore all characters if CREAD is not set.
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*/
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if ((cflag & CREAD) == 0)
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port->ignore_status_mask |= UART_DUMMY_UER_RX;
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/* set error signals - framing, parity and overrun */
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con |= ASCCON_FEN;
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con |= ASCCON_OEN;
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con |= ASCCON_PEN;
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/* enable the receiver */
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con |= ASCCON_REN;
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/* block the IRQs */
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local_irq_save(flags);
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/* set up CON */
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*AMAZON_ASC_CON = con;
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/* Set baud rate - take a divider of 2 into account */
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baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16);
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quot = uart_get_divisor(port, baud);
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quot = quot/2 - 1;
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/* the next 3 probably already happened when we set CON above */
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/* disable the baudrate generator */
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CLEAR_BIT(AMAZON_ASC_CON, ASCCON_R);
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/* make sure the fractional divider is off */
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CLEAR_BIT(AMAZON_ASC_CON, ASCCON_FDE);
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/* set up to use divisor of 2 */
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CLEAR_BIT(AMAZON_ASC_CON, ASCCON_BRS);
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/* now we can write the new baudrate into the register */
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*AMAZON_ASC_BTR = quot;
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/* turn the baudrate generator back on */
|
|
SET_BIT(AMAZON_ASC_CON, ASCCON_R);
|
|
|
|
/* unblock the IRQs */
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static const char *amazonasc_type(struct uart_port *port)
|
|
{
|
|
return port->type == PORT_AMAZONASC ? "AMAZONASC" : NULL;
|
|
}
|
|
|
|
/*
|
|
* Release the memory region(s) being used by 'port'
|
|
*/
|
|
static void amazonasc_release_port(struct uart_port *port)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Request the memory region(s) being used by 'port'
|
|
*/
|
|
static int amazonasc_request_port(struct uart_port *port)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Configure/autoconfigure the port.
|
|
*/
|
|
static void amazonasc_config_port(struct uart_port *port, int flags)
|
|
{
|
|
if (flags & UART_CONFIG_TYPE) {
|
|
port->type = PORT_AMAZONASC;
|
|
amazonasc_request_port(port);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* verify the new serial_struct (for TIOCSSERIAL).
|
|
*/
|
|
static int amazonasc_verify_port(struct uart_port *port, struct serial_struct *ser)
|
|
{
|
|
int ret = 0;
|
|
if (ser->type != PORT_UNKNOWN && ser->type != PORT_AMAZONASC)
|
|
ret = -EINVAL;
|
|
if (ser->irq < 0 || ser->irq >= NR_IRQS)
|
|
ret = -EINVAL;
|
|
if (ser->baud_base < 9600)
|
|
ret = -EINVAL;
|
|
return ret;
|
|
}
|
|
|
|
static struct uart_ops amazonasc_pops = {
|
|
.tx_empty = amazonasc_tx_empty,
|
|
.set_mctrl = amazonasc_set_mctrl,
|
|
.get_mctrl = amazonasc_get_mctrl,
|
|
.stop_tx = amazonasc_stop_tx,
|
|
.start_tx = amazonasc_start_tx,
|
|
.stop_rx = amazonasc_stop_rx,
|
|
.enable_ms = amazonasc_enable_ms,
|
|
.break_ctl = amazonasc_break_ctl,
|
|
.startup = amazonasc_startup,
|
|
.shutdown = amazonasc_shutdown,
|
|
.set_termios = amazonasc_set_termios,
|
|
.type = amazonasc_type,
|
|
.release_port = amazonasc_release_port,
|
|
.request_port = amazonasc_request_port,
|
|
.config_port = amazonasc_config_port,
|
|
.verify_port = amazonasc_verify_port,
|
|
};
|
|
|
|
static struct uart_port amazonasc_ports[UART_NR] = {
|
|
{
|
|
membase: (void *)AMAZON_ASC,
|
|
mapbase: AMAZON_ASC,
|
|
iotype: SERIAL_IO_MEM,
|
|
irq: AMAZONASC_RIR, /* RIR */
|
|
uartclk: 0, /* filled in dynamically */
|
|
fifosize: 16,
|
|
unused: { AMAZONASC_TIR, AMAZONASC_EIR}, /* xmit/error/xmit-buffer-empty IRQ */
|
|
type: PORT_AMAZONASC,
|
|
ops: &amazonasc_pops,
|
|
flags: ASYNC_BOOT_AUTOCONF,
|
|
},
|
|
};
|
|
|
|
|
|
|
|
static void amazonasc_console_write(struct console *co, const char *s, u_int count)
|
|
{
|
|
int i, fifocnt;
|
|
unsigned long flags;
|
|
/* block the IRQ */
|
|
local_irq_save(flags);
|
|
/*
|
|
* Now, do each character
|
|
*/
|
|
for (i = 0; i < count;)
|
|
{
|
|
/* wait until the FIFO is not full */
|
|
do
|
|
{
|
|
fifocnt = (*AMAZON_ASC_FSTAT & ASCFSTAT_TXFFLMASK)
|
|
>> ASCFSTAT_TXFFLOFF;
|
|
} while (fifocnt == AMAZONASC_TXFIFO_FULL);
|
|
#if 1
|
|
if (s[i] == '\0')
|
|
{
|
|
break;
|
|
}
|
|
#endif
|
|
if (s[i] == '\n')
|
|
{
|
|
*AMAZON_ASC_TBUF = '\r';
|
|
do
|
|
{
|
|
fifocnt = (*AMAZON_ASC_FSTAT &
|
|
ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF;
|
|
} while (fifocnt == AMAZONASC_TXFIFO_FULL);
|
|
}
|
|
*AMAZON_ASC_TBUF = s[i];
|
|
i++;
|
|
} /* for */
|
|
|
|
/* restore the IRQ */
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void __init
|
|
amazonasc_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
|
|
{
|
|
u_int lcr_h;
|
|
|
|
lcr_h = *AMAZON_ASC_CON;
|
|
/* do this only if the ASC is turned on */
|
|
if (lcr_h & ASCCON_R) {
|
|
u_int quot, div, fdiv, frac;
|
|
|
|
*parity = 'n';
|
|
if ((lcr_h & ASCCON_MODEMASK) == ASCCON_M_7ASYNCPAR ||
|
|
(lcr_h & ASCCON_MODEMASK) == ASCCON_M_8ASYNCPAR) {
|
|
if (lcr_h & ASCCON_ODD)
|
|
*parity = 'o';
|
|
else
|
|
*parity = 'e';
|
|
}
|
|
|
|
if ((lcr_h & ASCCON_MODEMASK) == ASCCON_M_7ASYNCPAR)
|
|
*bits = 7;
|
|
else
|
|
*bits = 8;
|
|
|
|
quot = *AMAZON_ASC_BTR + 1;
|
|
|
|
/* this gets hairy if the fractional divider is used */
|
|
if (lcr_h & ASCCON_FDE)
|
|
{
|
|
div = 1;
|
|
fdiv = *AMAZON_ASC_FDV;
|
|
if (fdiv == 0)
|
|
fdiv = 512;
|
|
frac = 512;
|
|
}
|
|
else
|
|
{
|
|
div = lcr_h & ASCCON_BRS ? 3 : 2;
|
|
fdiv = frac = 1;
|
|
}
|
|
/*
|
|
* This doesn't work exactly because we use integer
|
|
* math to calculate baud which results in rounding
|
|
* errors when we try to go from quot -> baud !!
|
|
* Try to make this work for both the fractional divider
|
|
* and the simple divider. Also try to avoid rounding
|
|
* errors using integer math.
|
|
*/
|
|
|
|
*baud = frac * (port->uartclk / (div * 512 * 16 * quot));
|
|
if (*baud > 1100 && *baud < 2400)
|
|
*baud = 1200;
|
|
if (*baud > 2300 && *baud < 4800)
|
|
*baud = 2400;
|
|
if (*baud > 4700 && *baud < 9600)
|
|
*baud = 4800;
|
|
if (*baud > 9500 && *baud < 19200)
|
|
*baud = 9600;
|
|
if (*baud > 19000 && *baud < 38400)
|
|
*baud = 19200;
|
|
if (*baud > 38400 && *baud < 57600)
|
|
*baud = 38400;
|
|
if (*baud > 57600 && *baud < 115200)
|
|
*baud = 57600;
|
|
if (*baud > 115200 && *baud < 230400)
|
|
*baud = 115200;
|
|
}
|
|
}
|
|
|
|
static int __init amazonasc_console_setup(struct console *co, char *options)
|
|
{
|
|
struct uart_port *port;
|
|
int baud = 115200;
|
|
int bits = 8;
|
|
int parity = 'n';
|
|
int flow = 'n';
|
|
|
|
/* this assumes: CON.BRS = CON.FDE = 0 */
|
|
if (uartclk == 0)
|
|
uartclk = amazon_get_fpi_hz();
|
|
co->index = 0;
|
|
port = &amazonasc_ports[0];
|
|
amazonasc_ports[0].uartclk = uartclk;
|
|
amazonasc_ports[0].type = PORT_AMAZONASC;
|
|
|
|
if (options){
|
|
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
|
}
|
|
|
|
return uart_set_options(port, co, baud, parity, bits, flow);
|
|
}
|
|
|
|
static struct uart_driver amazonasc_reg;
|
|
static struct console amazonasc_console = {
|
|
name: "ttyS",
|
|
write: amazonasc_console_write,
|
|
device: uart_console_device,
|
|
setup: amazonasc_console_setup,
|
|
flags: CON_PRINTBUFFER,
|
|
index: -1,
|
|
data: &amazonasc_reg,
|
|
};
|
|
|
|
static int __init amazonasc_console_init(void)
|
|
{
|
|
register_console(&amazonasc_console);
|
|
return 0;
|
|
}
|
|
console_initcall(amazonasc_console_init);
|
|
|
|
static struct uart_driver amazonasc_reg = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "serial",
|
|
.dev_name = "ttyS",
|
|
.major = TTY_MAJOR,
|
|
.minor = 64,
|
|
.nr = UART_NR,
|
|
.cons = &amazonasc_console,
|
|
};
|
|
|
|
static int __init amazonasc_init(void)
|
|
{
|
|
unsigned char res;
|
|
uart_register_driver(&amazonasc_reg);
|
|
res = uart_add_one_port(&amazonasc_reg, &amazonasc_ports[0]);
|
|
return res;
|
|
}
|
|
|
|
static void __exit amazonasc_exit(void)
|
|
{
|
|
uart_unregister_driver(&amazonasc_reg);
|
|
}
|
|
|
|
module_init(amazonasc_init);
|
|
module_exit(amazonasc_exit);
|
|
|
|
MODULE_AUTHOR("Gary Jennejohn, Felix Fietkau, John Crispin");
|
|
MODULE_DESCRIPTION("MIPS AMAZONASC serial port driver");
|
|
MODULE_LICENSE("GPL");
|