/* TRIO chip serial port driver
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/* TRIO chip serial port driver
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*
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*
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* Based on:
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* Based on:
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*
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*
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* drivers/char/68302serial.c
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* drivers/char/68302serial.c
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*/
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*/
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|
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/tty_flip.h>
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/major.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/fcntl.h>
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#include <linux/fcntl.h>
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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|
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#include <asm/io.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/irq.h>
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#include <asm/arch-trio/irq.h>
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#include <asm/arch-trio/irq.h>
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#include <asm/system.h>
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#include <asm/system.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#include <asm/bitops.h>
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#include <asm/bitops.h>
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#include <asm/delay.h>
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#include <asm/delay.h>
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#if 0
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#if 0
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#include <asm/kdebug.h>
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#include <asm/kdebug.h>
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#endif
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#endif
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#include "trioserial.h"
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#include "trioserial.h"
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|
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#define USE_INTS 1
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#define USE_INTS 1
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#define US_NB 2
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#define US_NB 2
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#define UART_CLOCK (ARM_CLK/16)
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#define UART_CLOCK (ARM_CLK/16)
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|
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|
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#define XMIT_SERIAL_SIZE PAGE_SIZE
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#define XMIT_SERIAL_SIZE PAGE_SIZE
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#define RX_SERIAL_SIZE PAGE_SIZE
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#define RX_SERIAL_SIZE PAGE_SIZE
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|
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static struct uart_regs *uarts[US_NB] = {
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static struct uart_regs *uarts[US_NB] = {
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(struct uart_regs*)USARTA_BASE, (struct uart_regs*)USARTB_BASE
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(struct uart_regs*)USARTA_BASE, (struct uart_regs*)USARTB_BASE
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};
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};
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static struct trio_serial trio_info[US_NB];
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static struct trio_serial trio_info[US_NB];
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struct tty_struct trio_ttys[US_NB];
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struct tty_struct trio_ttys[US_NB];
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|
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/* Console hooks... */
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/* Console hooks... */
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/*static int m68k_cons_chanout = 0;
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/*static int m68k_cons_chanout = 0;
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static int m68k_cons_chanin = 0;*/
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static int m68k_cons_chanin = 0;*/
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|
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struct trio_serial *trio_consinfo = 0;
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struct trio_serial *trio_consinfo = 0;
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|
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#if 0
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#if 0
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static unsigned char kgdb_regs[16] = {
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static unsigned char kgdb_regs[16] = {
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0, 0, 0, /* write 0, 1, 2 */
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0, 0, 0, /* write 0, 1, 2 */
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(Rx8 | RxENABLE), /* write 3 */
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(Rx8 | RxENABLE), /* write 3 */
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(X16CLK | SB1 | PAR_EVEN), /* write 4 */
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(X16CLK | SB1 | PAR_EVEN), /* write 4 */
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(Tx8 | TxENAB), /* write 5 */
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(Tx8 | TxENAB), /* write 5 */
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0, 0, 0, /* write 6, 7, 8 */
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0, 0, 0, /* write 6, 7, 8 */
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(NV), /* write 9 */
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(NV), /* write 9 */
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(NRZ), /* write 10 */
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(NRZ), /* write 10 */
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(TCBR | RCBR), /* write 11 */
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(TCBR | RCBR), /* write 11 */
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0, 0, /* BRG time constant, write 12 + 13 */
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0, 0, /* BRG time constant, write 12 + 13 */
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(BRSRC | BRENABL), /* write 14 */
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(BRSRC | BRENABL), /* write 14 */
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(DCDIE) /* write 15 */
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(DCDIE) /* write 15 */
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};
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};
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#endif
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#endif
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DECLARE_TASK_QUEUE(tq_serial);
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DECLARE_TASK_QUEUE(tq_serial);
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|
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struct tq_struct serialpoll;
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struct tq_struct serialpoll;
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|
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struct tty_driver serial_driver, callout_driver;
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struct tty_driver serial_driver, callout_driver;
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static int serial_refcount;
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static int serial_refcount;
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/* serial subtype definitions */
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/* serial subtype definitions */
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#define SERIAL_TYPE_NORMAL 1
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#define SERIAL_TYPE_NORMAL 1
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#define SERIAL_TYPE_CALLOUT 2
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#define SERIAL_TYPE_CALLOUT 2
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|
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/* number of characters left in xmit buffer before we ask for more */
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/* number of characters left in xmit buffer before we ask for more */
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#define WAKEUP_CHARS 256
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#define WAKEUP_CHARS 256
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|
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/* Debugging... DEBUG_INTR is bad to use when one of the zs
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/* Debugging... DEBUG_INTR is bad to use when one of the zs
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* lines is your console ;(
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* lines is your console ;(
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*/
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*/
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#undef SERIAL_DEBUG_INTR
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#undef SERIAL_DEBUG_INTR
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#undef SERIAL_DEBUG_OPEN
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#undef SERIAL_DEBUG_OPEN
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#undef SERIAL_DEBUG_FLOW
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#undef SERIAL_DEBUG_FLOW
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|
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#define RS_ISR_PASS_LIMIT 256
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#define RS_ISR_PASS_LIMIT 256
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#define _INLINE_
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#define _INLINE_
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static void serpoll(void *data);
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static void serpoll(void *data);
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static void change_speed(struct trio_serial *info);
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static void change_speed(struct trio_serial *info);
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|
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static struct tty_struct *serial_table[US_NB];
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static struct tty_struct *serial_table[US_NB];
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static struct termios *serial_termios[US_NB];
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static struct termios *serial_termios[US_NB];
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static struct termios *serial_termios_locked[US_NB];
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static struct termios *serial_termios_locked[US_NB];
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|
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#ifndef MIN
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#ifndef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#endif
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#endif
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static char prompt0;
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static char prompt0;
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static void xmit_char(struct trio_serial* info, char ch);
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static void xmit_char(struct trio_serial* info, char ch);
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static void xmit_string(struct trio_serial *info, char *p, int len);
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static void xmit_string(struct trio_serial *info, char *p, int len);
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static void start_rx(struct trio_serial *info);
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static void start_rx(struct trio_serial *info);
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static void wait_EOT(struct uart_regs*);
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static void wait_EOT(struct uart_regs*);
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static void uart_init(struct trio_serial *info);
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static void uart_init(struct trio_serial *info);
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static void uart_speed(struct trio_serial *info, unsigned cflag);
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static void uart_speed(struct trio_serial *info, unsigned cflag);
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|
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static void tx_enable(struct uart_regs *uart);
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static void tx_enable(struct uart_regs *uart);
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static void rx_enable(struct uart_regs *uart);
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static void rx_enable(struct uart_regs *uart);
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static void tx_disable(struct uart_regs *uart);
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static void tx_disable(struct uart_regs *uart);
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static void rx_disable(struct uart_regs *uart);
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static void rx_disable(struct uart_regs *uart);
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static void tx_stop(struct uart_regs *uart);
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static void tx_stop(struct uart_regs *uart);
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static void tx_start(struct uart_regs *uart, int ints);
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static void tx_start(struct uart_regs *uart, int ints);
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static void rx_stop(struct uart_regs *uart);
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static void rx_stop(struct uart_regs *uart);
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static void rx_start(struct uart_regs *uart, int ints);
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static void rx_start(struct uart_regs *uart, int ints);
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static void set_ints_mode(int yes, struct trio_serial *info);
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static void set_ints_mode(int yes, struct trio_serial *info);
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static void rs_interrupt(struct trio_serial *info);
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static void rs_interrupt(struct trio_serial *info);
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extern void show_net_buffers(void);
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extern void show_net_buffers(void);
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extern void hard_reset_now(void);
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extern void hard_reset_now(void);
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|
|
|
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static void _INLINE_ tx_enable(struct uart_regs *uart){
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static void _INLINE_ tx_enable(struct uart_regs *uart){
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uart->ier |= US_TXRDY;
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uart->ier |= US_TXRDY;
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}
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}
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static void _INLINE_ rx_enable(struct uart_regs *uart){
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static void _INLINE_ rx_enable(struct uart_regs *uart){
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uart->ier |= US_RXRDY;
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uart->ier |= US_RXRDY;
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}
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}
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static void _INLINE_ tx_disable(struct uart_regs *uart){
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static void _INLINE_ tx_disable(struct uart_regs *uart){
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uart->idr |= US_TXRDY;
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uart->idr |= US_TXRDY;
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}
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}
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static void _INLINE_ rx_disable(struct uart_regs *uart){
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static void _INLINE_ rx_disable(struct uart_regs *uart){
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uart->idr |= US_RXRDY;
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uart->idr |= US_RXRDY;
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}
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}
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static void _INLINE_ tx_stop(struct uart_regs *uart){
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static void _INLINE_ tx_stop(struct uart_regs *uart){
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tx_disable(uart);
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tx_disable(uart);
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uart->cr |= US_RXEN;
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uart->cr |= US_RXEN;
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}
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}
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static void _INLINE_ tx_start(struct uart_regs *uart, int ints){
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static void _INLINE_ tx_start(struct uart_regs *uart, int ints){
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if(ints)
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if(ints)
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tx_enable(uart);
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tx_enable(uart);
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uart->cr |= US_TXEN;
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uart->cr |= US_TXEN;
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}
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}
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static void _INLINE_ rx_stop(struct uart_regs *uart){
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static void _INLINE_ rx_stop(struct uart_regs *uart){
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rx_disable(uart);
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rx_disable(uart);
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uart->cr |= US_RXDIS;
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uart->cr |= US_RXDIS;
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}
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}
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static void _INLINE_ rx_start(struct uart_regs *uart, int ints){
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static void _INLINE_ rx_start(struct uart_regs *uart, int ints){
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if(ints)
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if(ints)
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rx_enable(uart);
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rx_enable(uart);
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uart->cr |= US_RXEN;
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uart->cr |= US_RXEN;
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}
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}
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|
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static void set_ints_mode(int yes, struct trio_serial *info){
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static void set_ints_mode(int yes, struct trio_serial *info){
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info->use_ints = yes;
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info->use_ints = yes;
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(yes)?unmask_irq(info->irq):mask_irq(info->irq);
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(yes)?unmask_irq(info->irq):mask_irq(info->irq);
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}
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}
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|
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/*
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/*
|
* tmp_buf is used as a temporary buffer by serial_write. We need to
|
* tmp_buf is used as a temporary buffer by serial_write. We need to
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* lock it in case the memcpy_fromfs blocks while swapping in a page,
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* lock it in case the memcpy_fromfs blocks while swapping in a page,
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* and some other program tries to do a serial write at the same time.
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* and some other program tries to do a serial write at the same time.
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* Since the lock will only come under contention when the system is
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* Since the lock will only come under contention when the system is
|
* swapping and available memory is low, it makes sense to share one
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* swapping and available memory is low, it makes sense to share one
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* buffer across all the serial ports, since it significantly saves
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* buffer across all the serial ports, since it significantly saves
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* memory if large numbers of serial ports are open.
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* memory if large numbers of serial ports are open.
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*/
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*/
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static unsigned char tmp_buf[XMIT_SERIAL_SIZE]; /* This is cheating */
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static unsigned char tmp_buf[XMIT_SERIAL_SIZE]; /* This is cheating */
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static struct semaphore tmp_buf_sem = MUTEX;
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static struct semaphore tmp_buf_sem = MUTEX;
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static inline int serial_paranoia_check(struct trio_serial *info,
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static inline int serial_paranoia_check(struct trio_serial *info,
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dev_t device, const char *routine)
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dev_t device, const char *routine)
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{
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{
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#ifdef SERIAL_PARANOIA_CHECK
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#ifdef SERIAL_PARANOIA_CHECK
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static const char *badmagic =
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static const char *badmagic =
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"Warning: bad magic number for serial struct (%d, %d) in %s\n";
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"Warning: bad magic number for serial struct (%d, %d) in %s\n";
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static const char *badinfo =
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static const char *badinfo =
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"Warning: null trio_serial for (%d, %d) in %s\n";
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"Warning: null trio_serial for (%d, %d) in %s\n";
|
|
|
if (!info) {
|
if (!info) {
|
printk(badinfo, MAJOR(device), MINOR(device), routine);
|
printk(badinfo, MAJOR(device), MINOR(device), routine);
|
return 1;
|
return 1;
|
}
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}
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if (info->magic != SERIAL_MAGIC) {
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if (info->magic != SERIAL_MAGIC) {
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printk(badmagic, MAJOR(device), MINOR(device), routine);
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printk(badmagic, MAJOR(device), MINOR(device), routine);
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return 1;
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return 1;
|
}
|
}
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#endif
|
#endif
|
return 0;
|
return 0;
|
}
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}
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|
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/* Sets or clears DTR/RTS on the requested line */
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/* Sets or clears DTR/RTS on the requested line */
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static inline void trio_rtsdtr(struct trio_serial *ss, int set)
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static inline void trio_rtsdtr(struct trio_serial *ss, int set)
|
{
|
{
|
struct uart_regs *uart;
|
struct uart_regs *uart;
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uart = ss->uart;
|
uart = ss->uart;
|
if(set) {
|
if(set) {
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uart->mc |= US_DTR | US_RTS;
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uart->mc |= US_DTR | US_RTS;
|
} else {
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} else {
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uart->mc &= ~(u_32)(US_DTR | US_RTS);
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uart->mc &= ~(u_32)(US_DTR | US_RTS);
|
}
|
}
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return;
|
return;
|
}
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}
|
|
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static inline void kgdb_chaninit(struct trio_serial *ss, int intson, int bps)
|
static inline void kgdb_chaninit(struct trio_serial *ss, int intson, int bps)
|
{
|
{
|
#if 0
|
#if 0
|
int brg;
|
int brg;
|
|
|
if(intson) {
|
if(intson) {
|
kgdb_regs[R1] = INT_ALL_Rx;
|
kgdb_regs[R1] = INT_ALL_Rx;
|
kgdb_regs[R9] |= MIE;
|
kgdb_regs[R9] |= MIE;
|
} else {
|
} else {
|
kgdb_regs[R1] = 0;
|
kgdb_regs[R1] = 0;
|
kgdb_regs[R9] &= ~MIE;
|
kgdb_regs[R9] &= ~MIE;
|
}
|
}
|
brg = BPS_TO_BRG(bps, ZS_CLOCK/16);
|
brg = BPS_TO_BRG(bps, ZS_CLOCK/16);
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kgdb_regs[R12] = (brg & 255);
|
kgdb_regs[R12] = (brg & 255);
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kgdb_regs[R13] = ((brg >> 8) & 255);
|
kgdb_regs[R13] = ((brg >> 8) & 255);
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load_zsregs(ss->trio_channel, kgdb_regs);
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load_zsregs(ss->trio_channel, kgdb_regs);
|
#endif
|
#endif
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_stop() and rs_start()
|
* rs_stop() and rs_start()
|
*
|
*
|
* This routines are called before setting or resetting tty->stopped.
|
* This routines are called before setting or resetting tty->stopped.
|
* They enable or disable transmitter interrupts, as necessary.
|
* They enable or disable transmitter interrupts, as necessary.
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
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static void rs_stop(struct tty_struct *tty)
|
static void rs_stop(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_stop"))
|
if (serial_paranoia_check(info, tty->device, "rs_stop"))
|
return;
|
return;
|
|
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
tx_stop(info->uart);
|
tx_stop(info->uart);
|
rx_stop(info->uart);
|
rx_stop(info->uart);
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
static void rs_put_char(struct trio_serial *info, char ch)
|
static void rs_put_char(struct trio_serial *info, char ch)
|
{
|
{
|
int flags = 0;
|
int flags = 0;
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
xmit_char(info,ch);
|
xmit_char(info,ch);
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
static void rs_start(struct tty_struct *tty)
|
static void rs_start(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_start"))
|
if (serial_paranoia_check(info, tty->device, "rs_start"))
|
return;
|
return;
|
|
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
tx_start(info->uart, info->use_ints);
|
tx_start(info->uart, info->use_ints);
|
start_rx(info);
|
start_rx(info);
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
/* Drop into either the boot monitor or kadb upon receiving a break
|
/* Drop into either the boot monitor or kadb upon receiving a break
|
* from keyboard/console input.
|
* from keyboard/console input.
|
*/
|
*/
|
static void batten_down_hatches(void)
|
static void batten_down_hatches(void)
|
{
|
{
|
/* If we are doing kadb, we call the debugger
|
/* If we are doing kadb, we call the debugger
|
* else we just drop into the boot monitor.
|
* else we just drop into the boot monitor.
|
* Note that we must flush the user windows
|
* Note that we must flush the user windows
|
* first before giving up control.
|
* first before giving up control.
|
*/
|
*/
|
#if 0
|
#if 0
|
if((((unsigned long)linux_dbvec)>=DEBUG_FIRSTVADDR) &&
|
if((((unsigned long)linux_dbvec)>=DEBUG_FIRSTVADDR) &&
|
(((unsigned long)linux_dbvec)<=DEBUG_LASTVADDR))
|
(((unsigned long)linux_dbvec)<=DEBUG_LASTVADDR))
|
sp_enter_debugger();
|
sp_enter_debugger();
|
else
|
else
|
panic("trio_serial: batten_down_hatches");
|
panic("trio_serial: batten_down_hatches");
|
return;
|
return;
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* ----------------------------------------------------------------------
|
* ----------------------------------------------------------------------
|
*
|
*
|
* Here starts the interrupt handling routines. All of the following
|
* Here starts the interrupt handling routines. All of the following
|
* subroutines are declared as inline and are folded into
|
* subroutines are declared as inline and are folded into
|
* rs_interrupt(). They were separated out for readability's sake.
|
* rs_interrupt(). They were separated out for readability's sake.
|
*
|
*
|
* Note: rs_interrupt() is a "fast" interrupt, which means that it
|
* Note: rs_interrupt() is a "fast" interrupt, which means that it
|
* runs with interrupts turned off. People who may want to modify
|
* runs with interrupts turned off. People who may want to modify
|
* rs_interrupt() should try to keep the interrupt handler as fast as
|
* rs_interrupt() should try to keep the interrupt handler as fast as
|
* possible. After you are done making modifications, it is not a bad
|
* possible. After you are done making modifications, it is not a bad
|
* idea to do:
|
* idea to do:
|
*
|
*
|
* gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
|
* gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
|
*
|
*
|
* and look at the resulting assemble code in serial.s.
|
* and look at the resulting assemble code in serial.s.
|
*
|
*
|
* - Ted Ts'o (tytso@mit.edu), 7-Mar-93
|
* - Ted Ts'o (tytso@mit.edu), 7-Mar-93
|
* -----------------------------------------------------------------------
|
* -----------------------------------------------------------------------
|
*/
|
*/
|
|
|
/*
|
/*
|
* This routine is used by the interrupt handler to schedule
|
* This routine is used by the interrupt handler to schedule
|
* processing in the software interrupt portion of the driver.
|
* processing in the software interrupt portion of the driver.
|
*/
|
*/
|
static _INLINE_ void rs_sched_event(struct trio_serial *info,
|
static _INLINE_ void rs_sched_event(struct trio_serial *info,
|
int event)
|
int event)
|
{
|
{
|
info->event |= 1 << event;
|
info->event |= 1 << event;
|
queue_task_irq_off(&info->tqueue, &tq_serial);
|
queue_task_irq_off(&info->tqueue, &tq_serial);
|
mark_bh(SERIAL_BH);
|
mark_bh(SERIAL_BH);
|
}
|
}
|
|
|
extern void breakpoint(void); /* For the KGDB frame character */
|
extern void breakpoint(void); /* For the KGDB frame character */
|
|
|
static _INLINE_ void receive_chars(struct trio_serial *info, u_32 status)
|
static _INLINE_ void receive_chars(struct trio_serial *info, u_32 status)
|
{
|
{
|
unsigned char ch;
|
unsigned char ch;
|
int count;
|
int count;
|
struct uart_regs *uart = info->uart;
|
struct uart_regs *uart = info->uart;
|
#if 0
|
#if 0
|
// hack to receive chars by polling from anywhere
|
// hack to receive chars by polling from anywhere
|
struct trio_serial * info1 = &trio_info;
|
struct trio_serial * info1 = &trio_info;
|
struct tty_struct *tty = info1->tty;
|
struct tty_struct *tty = info1->tty;
|
if (!(info->flags & S_INITIALIZED))
|
if (!(info->flags & S_INITIALIZED))
|
return;
|
return;
|
#else
|
#else
|
struct tty_struct *tty = info->tty;
|
struct tty_struct *tty = info->tty;
|
if (!(info->flags & S_INITIALIZED))
|
if (!(info->flags & S_INITIALIZED))
|
return;
|
return;
|
#endif
|
#endif
|
count = uart->rcr;
|
count = uart->rcr;
|
// hack to receive chars by polling only BD fields
|
// hack to receive chars by polling only BD fields
|
if (!(status & US_RXRDY) || !count){
|
if (!(status & US_RXRDY) || !count){
|
return;
|
return;
|
}
|
}
|
ch = info->rx_buf[0];
|
ch = info->rx_buf[0];
|
if(info->is_cons) {
|
if(info->is_cons) {
|
if(status & US_RXBRK) { /* whee, break received */
|
if(status & US_RXBRK) { /* whee, break received */
|
batten_down_hatches();
|
batten_down_hatches();
|
/*rs_recv_clear(info->trio_channel);*/
|
/*rs_recv_clear(info->trio_channel);*/
|
return;
|
return;
|
} else if (ch == 0x10) { /* ^P */
|
} else if (ch == 0x10) { /* ^P */
|
show_state();
|
show_state();
|
show_free_areas();
|
show_free_areas();
|
show_buffers();
|
show_buffers();
|
show_net_buffers();
|
show_net_buffers();
|
return;
|
return;
|
} else if (ch == 0x12) { /* ^R */
|
} else if (ch == 0x12) { /* ^R */
|
hard_reset_now();
|
hard_reset_now();
|
return;
|
return;
|
}
|
}
|
/* It is a 'keyboard interrupt' ;-) */
|
/* It is a 'keyboard interrupt' ;-) */
|
wake_up(&keypress_wait);
|
wake_up(&keypress_wait);
|
}
|
}
|
/* Look for kgdb 'stop' character, consult the gdb documentation
|
/* Look for kgdb 'stop' character, consult the gdb documentation
|
* for remote target debugging and arch/sparc/kernel/sparc-stub.c
|
* for remote target debugging and arch/sparc/kernel/sparc-stub.c
|
* to see how all this works.
|
* to see how all this works.
|
*/
|
*/
|
/*if((info->kgdb_channel) && (ch =='\003')) {
|
/*if((info->kgdb_channel) && (ch =='\003')) {
|
breakpoint();
|
breakpoint();
|
goto clear_and_exit;
|
goto clear_and_exit;
|
}*/
|
}*/
|
|
|
if(!tty)
|
if(!tty)
|
goto clear_and_exit;
|
goto clear_and_exit;
|
|
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
|
queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
|
queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
|
tty->flip.count++;
|
tty->flip.count++;
|
if(status & US_PARE)
|
if(status & US_PARE)
|
*tty->flip.flag_buf_ptr++ = TTY_PARITY;
|
*tty->flip.flag_buf_ptr++ = TTY_PARITY;
|
else if(status & US_OVRE)
|
else if(status & US_OVRE)
|
*tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
|
*tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
|
else if(status & US_FRAME)
|
else if(status & US_FRAME)
|
*tty->flip.flag_buf_ptr++ = TTY_FRAME;
|
*tty->flip.flag_buf_ptr++ = TTY_FRAME;
|
else
|
else
|
*tty->flip.flag_buf_ptr++ = 0; /* XXX */
|
*tty->flip.flag_buf_ptr++ = 0; /* XXX */
|
*tty->flip.char_buf_ptr++ = ch;
|
*tty->flip.char_buf_ptr++ = ch;
|
|
|
queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
|
queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
|
|
|
clear_and_exit:
|
clear_and_exit:
|
start_rx(info);
|
start_rx(info);
|
return;
|
return;
|
}
|
}
|
|
|
static _INLINE_ void transmit_chars(struct trio_serial *info)
|
static _INLINE_ void transmit_chars(struct trio_serial *info)
|
{
|
{
|
if (info->x_char) {
|
if (info->x_char) {
|
/* Send next char */
|
/* Send next char */
|
xmit_char(info, info->x_char);
|
xmit_char(info, info->x_char);
|
info->x_char = 0;
|
info->x_char = 0;
|
goto clear_and_return;
|
goto clear_and_return;
|
}
|
}
|
|
|
if((info->xmit_cnt <= 0) || info->tty->stopped) {
|
if((info->xmit_cnt <= 0) || info->tty->stopped) {
|
/* That's peculiar... */
|
/* That's peculiar... */
|
// tx_stop(0);
|
// tx_stop(0);
|
goto clear_and_return;
|
goto clear_and_return;
|
}
|
}
|
|
|
/* Send char */
|
/* Send char */
|
xmit_char(info, info->xmit_buf[info->xmit_tail++]);
|
xmit_char(info, info->xmit_buf[info->xmit_tail++]);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt--;
|
info->xmit_cnt--;
|
|
|
if (info->xmit_cnt < WAKEUP_CHARS)
|
if (info->xmit_cnt < WAKEUP_CHARS)
|
rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
|
rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
|
|
|
if(info->xmit_cnt <= 0) {
|
if(info->xmit_cnt <= 0) {
|
// tx_stop(0);
|
// tx_stop(0);
|
goto clear_and_return;
|
goto clear_and_return;
|
}
|
}
|
|
|
clear_and_return:
|
clear_and_return:
|
/* Clear interrupt (should be auto)*/
|
/* Clear interrupt (should be auto)*/
|
return;
|
return;
|
}
|
}
|
|
|
static _INLINE_ void status_handle(struct trio_serial *info, u_32 status)
|
static _INLINE_ void status_handle(struct trio_serial *info, u_32 status)
|
{
|
{
|
#if 0
|
#if 0
|
if(status & DCD) {
|
if(status & DCD) {
|
if((info->tty->termios->c_cflag & CRTSCTS) &&
|
if((info->tty->termios->c_cflag & CRTSCTS) &&
|
((info->curregs[3] & AUTO_ENAB)==0)) {
|
((info->curregs[3] & AUTO_ENAB)==0)) {
|
info->curregs[3] |= AUTO_ENAB;
|
info->curregs[3] |= AUTO_ENAB;
|
info->pendregs[3] |= AUTO_ENAB;
|
info->pendregs[3] |= AUTO_ENAB;
|
write_zsreg(info->trio_channel, 3, info->curregs[3]);
|
write_zsreg(info->trio_channel, 3, info->curregs[3]);
|
}
|
}
|
} else {
|
} else {
|
if((info->curregs[3] & AUTO_ENAB)) {
|
if((info->curregs[3] & AUTO_ENAB)) {
|
info->curregs[3] &= ~AUTO_ENAB;
|
info->curregs[3] &= ~AUTO_ENAB;
|
info->pendregs[3] &= ~AUTO_ENAB;
|
info->pendregs[3] &= ~AUTO_ENAB;
|
write_zsreg(info->trio_channel, 3, info->curregs[3]);
|
write_zsreg(info->trio_channel, 3, info->curregs[3]);
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
/* Whee, if this is console input and this is a
|
/* Whee, if this is console input and this is a
|
* 'break asserted' status change interrupt, call
|
* 'break asserted' status change interrupt, call
|
* the boot prom.
|
* the boot prom.
|
*/
|
*/
|
if((status & US_RXBRK) && info->break_abort)
|
if((status & US_RXBRK) && info->break_abort)
|
batten_down_hatches();
|
batten_down_hatches();
|
|
|
/* XXX Whee, put in a buffer somewhere, the status information
|
/* XXX Whee, put in a buffer somewhere, the status information
|
* XXX whee whee whee... Where does the information go...
|
* XXX whee whee whee... Where does the information go...
|
*/
|
*/
|
return;
|
return;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* This is the serial driver's generic interrupt routine
|
* This is the serial driver's generic interrupt routine
|
*/
|
*/
|
void rs_interrupta(int irq, void *dev_id, struct pt_regs * regs){
|
void rs_interrupta(int irq, void *dev_id, struct pt_regs * regs){
|
rs_interrupt(&trio_info[0]);
|
rs_interrupt(&trio_info[0]);
|
}
|
}
|
void rs_interruptb(int irq, void *dev_id, struct pt_regs * regs){
|
void rs_interruptb(int irq, void *dev_id, struct pt_regs * regs){
|
rs_interrupt(&trio_info[1]);
|
rs_interrupt(&trio_info[1]);
|
}
|
}
|
static void rs_interrupt(struct trio_serial *info)
|
static void rs_interrupt(struct trio_serial *info)
|
{
|
{
|
u_32 status;
|
u_32 status;
|
status = info->uart->csr;
|
status = info->uart->csr;
|
|
|
if (status & US_TXRDY) {
|
if (status & US_TXRDY) {
|
transmit_chars(info);
|
transmit_chars(info);
|
}
|
}
|
if (status & US_RXRDY){
|
if (status & US_RXRDY){
|
receive_chars(info, status);
|
receive_chars(info, status);
|
}
|
}
|
status_handle(info, status);
|
status_handle(info, status);
|
|
|
if(!info->use_ints){
|
if(!info->use_ints){
|
serialpoll.data = (void *)info;
|
serialpoll.data = (void *)info;
|
queue_task_irq_off(&serialpoll, &tq_timer);
|
queue_task_irq_off(&serialpoll, &tq_timer);
|
}
|
}
|
return;
|
return;
|
}
|
}
|
static void serpoll(void *data){
|
static void serpoll(void *data){
|
struct trio_serial * info = data;
|
struct trio_serial * info = data;
|
rs_interrupt(info);
|
rs_interrupt(info);
|
}
|
}
|
|
|
/*
|
/*
|
* -------------------------------------------------------------------
|
* -------------------------------------------------------------------
|
* Here ends the serial interrupt routines.
|
* Here ends the serial interrupt routines.
|
* -------------------------------------------------------------------
|
* -------------------------------------------------------------------
|
*/
|
*/
|
|
|
/*
|
/*
|
* This routine is used to handle the "bottom half" processing for the
|
* This routine is used to handle the "bottom half" processing for the
|
* serial driver, known also the "software interrupt" processing.
|
* serial driver, known also the "software interrupt" processing.
|
* This processing is done at the kernel interrupt level, after the
|
* This processing is done at the kernel interrupt level, after the
|
* rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
|
* rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
|
* is where time-consuming activities which can not be done in the
|
* is where time-consuming activities which can not be done in the
|
* interrupt driver proper are done; the interrupt driver schedules
|
* interrupt driver proper are done; the interrupt driver schedules
|
* them using rs_sched_event(), and they get done here.
|
* them using rs_sched_event(), and they get done here.
|
*/
|
*/
|
static void do_serial_bh(void)
|
static void do_serial_bh(void)
|
{
|
{
|
run_task_queue(&tq_serial);
|
run_task_queue(&tq_serial);
|
}
|
}
|
|
|
static void do_softint(void *private_)
|
static void do_softint(void *private_)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *) private_;
|
struct trio_serial *info = (struct trio_serial *) private_;
|
struct tty_struct *tty;
|
struct tty_struct *tty;
|
|
|
tty = info->tty;
|
tty = info->tty;
|
if (!tty)
|
if (!tty)
|
return;
|
return;
|
|
|
if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
|
if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
tty->ldisc.write_wakeup)
|
tty->ldisc.write_wakeup)
|
(tty->ldisc.write_wakeup)(tty);
|
(tty->ldisc.write_wakeup)(tty);
|
wake_up_interruptible(&tty->write_wait);
|
wake_up_interruptible(&tty->write_wait);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called from the scheduler tqueue when the interrupt
|
* This routine is called from the scheduler tqueue when the interrupt
|
* routine has signalled that a hangup has occurred. The path of
|
* routine has signalled that a hangup has occurred. The path of
|
* hangup processing is:
|
* hangup processing is:
|
*
|
*
|
* serial interrupt routine -> (scheduler tqueue) ->
|
* serial interrupt routine -> (scheduler tqueue) ->
|
* do_serial_hangup() -> tty->hangup() -> rs_hangup()
|
* do_serial_hangup() -> tty->hangup() -> rs_hangup()
|
*
|
*
|
*/
|
*/
|
static void do_serial_hangup(void *private_)
|
static void do_serial_hangup(void *private_)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *) private_;
|
struct trio_serial *info = (struct trio_serial *) private_;
|
struct tty_struct *tty;
|
struct tty_struct *tty;
|
|
|
tty = info->tty;
|
tty = info->tty;
|
if (!tty)
|
if (!tty)
|
return;
|
return;
|
|
|
tty_hangup(tty);
|
tty_hangup(tty);
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* This subroutine is called when the RS_TIMER goes off. It is used
|
* This subroutine is called when the RS_TIMER goes off. It is used
|
* by the serial driver to handle ports that do not have an interrupt
|
* by the serial driver to handle ports that do not have an interrupt
|
* (irq=0). This doesn't work at all for 16450's, as a sun has a Z8530.
|
* (irq=0). This doesn't work at all for 16450's, as a sun has a Z8530.
|
*/
|
*/
|
|
|
static void rs_timer(void)
|
static void rs_timer(void)
|
{
|
{
|
panic("rs_timer called\n");
|
panic("rs_timer called\n");
|
return;
|
return;
|
}
|
}
|
static u_32 calcCD(u_32 br){
|
static u_32 calcCD(u_32 br){
|
return(UART_CLOCK/br);
|
return(UART_CLOCK/br);
|
}
|
}
|
static void uart_init(struct trio_serial *info){
|
static void uart_init(struct trio_serial *info){
|
struct uart_regs* uart;
|
struct uart_regs* uart;
|
if(info){
|
if(info){
|
uart = info->uart;
|
uart = info->uart;
|
}else{
|
}else{
|
uart = uarts[0];
|
uart = uarts[0];
|
}
|
}
|
uart->cr = US_RSTRX|US_RSTTX|US_RSTSTA|US_TXDIS|US_RXDIS;
|
uart->cr = US_RSTRX|US_RSTTX|US_RSTSTA|US_TXDIS|US_RXDIS;
|
uart->mr = US_USCLKS(0)|US_CLK0|US_CHMODE(0)|US_NBSTOP(0)|US_PAR(4)|US_CHRL(3);
|
uart->mr = US_USCLKS(0)|US_CLK0|US_CHMODE(0)|US_NBSTOP(0)|US_PAR(4)|US_CHRL(3);
|
uart->ier = 0;
|
uart->ier = 0;
|
uart->idr = US_ALL_INTS;
|
uart->idr = US_ALL_INTS;
|
uart->brgr = calcCD(9600);
|
uart->brgr = calcCD(9600);
|
uart->rtor = 100; // timeout = value * 4 * bit period
|
uart->rtor = 100; // timeout = value * 4 * bit period
|
uart->ttgr = 0; // no guard time
|
uart->ttgr = 0; // no guard time
|
uart->rpr = 0;
|
uart->rpr = 0;
|
uart->rcr = 0;
|
uart->rcr = 0;
|
uart->tpr = 0;
|
uart->tpr = 0;
|
uart->tcr = 0;
|
uart->tcr = 0;
|
uart->mc = 0;
|
uart->mc = 0;
|
}
|
}
|
|
|
static void uart_speed(struct trio_serial *info, unsigned cflag){
|
static void uart_speed(struct trio_serial *info, unsigned cflag){
|
unsigned baud = info->baud;
|
unsigned baud = info->baud;
|
struct uart_regs *uart = info->uart;
|
struct uart_regs *uart = info->uart;
|
|
|
uart->cr = US_TXDIS|US_RXDIS;
|
uart->cr = US_TXDIS|US_RXDIS;
|
uart->ier = 0;
|
uart->ier = 0;
|
uart->idr = US_ALL_INTS;
|
uart->idr = US_ALL_INTS;
|
uart->brgr = calcCD(baud);
|
uart->brgr = calcCD(baud);
|
uart->rtor = 100; // timeout = value * 4 *bit period
|
uart->rtor = 100; // timeout = value * 4 *bit period
|
uart->ttgr = 0; // no guard time
|
uart->ttgr = 0; // no guard time
|
uart->rpr = 0;
|
uart->rpr = 0;
|
uart->rcr = 0;
|
uart->rcr = 0;
|
uart->tpr = 0;
|
uart->tpr = 0;
|
uart->tcr =0;
|
uart->tcr =0;
|
uart->mc = 0;
|
uart->mc = 0;
|
if (cflag != 0xffff){
|
if (cflag != 0xffff){
|
uart->mr = US_USCLKS(0)|US_CLK0|US_CHMODE(0)|US_PAR(0);
|
uart->mr = US_USCLKS(0)|US_CLK0|US_CHMODE(0)|US_PAR(0);
|
|
|
if ((cflag & CSIZE) == CS8)
|
if ((cflag & CSIZE) == CS8)
|
uart->mr |= US_CHRL(3); // 8 bit char
|
uart->mr |= US_CHRL(3); // 8 bit char
|
else
|
else
|
uart->mr |= US_CHRL(2); // 7 bit char
|
uart->mr |= US_CHRL(2); // 7 bit char
|
|
|
if (cflag & CSTOPB)
|
if (cflag & CSTOPB)
|
uart->mr |= US_NBSTOP(2); // 2 stop bits
|
uart->mr |= US_NBSTOP(2); // 2 stop bits
|
|
|
if (!(cflag & PARENB))
|
if (!(cflag & PARENB))
|
uart->mr |= US_PAR(4); // parity disabled
|
uart->mr |= US_PAR(4); // parity disabled
|
else
|
else
|
if (cflag & PARODD)
|
if (cflag & PARODD)
|
uart->mr |= US_PAR(1); // odd parity
|
uart->mr |= US_PAR(1); // odd parity
|
}
|
}
|
tx_start(uart, info->use_ints);
|
tx_start(uart, info->use_ints);
|
start_rx(info);
|
start_rx(info);
|
}
|
}
|
static void wait_EOT(struct uart_regs *uart){
|
static void wait_EOT(struct uart_regs *uart){
|
volatile u_32 status;
|
volatile u_32 status;
|
volatile struct uart_regs* puart;
|
volatile struct uart_regs* puart;
|
puart = (volatile struct uart_regs*)uart;
|
puart = (volatile struct uart_regs*)uart;
|
while(1){
|
while(1){
|
status = puart->csr;
|
status = puart->csr;
|
if(status & US_TXRDY)
|
if(status & US_TXRDY)
|
break;
|
break;
|
}
|
}
|
}
|
}
|
static int startup(struct trio_serial * info)
|
static int startup(struct trio_serial * info)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (info->flags & S_INITIALIZED)
|
if (info->flags & S_INITIALIZED)
|
return 0;
|
return 0;
|
|
|
if (!info->xmit_buf) {
|
if (!info->xmit_buf) {
|
info->xmit_buf = (unsigned char *) get_free_page(GFP_KERNEL);
|
info->xmit_buf = (unsigned char *) get_free_page(GFP_KERNEL);
|
if (!info->xmit_buf)
|
if (!info->xmit_buf)
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
if (!info->rx_buf) {
|
if (!info->rx_buf) {
|
info->rx_buf = (unsigned char *) get_free_page(GFP_KERNEL);
|
info->rx_buf = (unsigned char *) get_free_page(GFP_KERNEL);
|
if (!info->rx_buf)
|
if (!info->rx_buf)
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("starting up ttyS%d (irq %d)...\n", info->line, info->irq);
|
printk("starting up ttyS%d (irq %d)...\n", info->line, info->irq);
|
#endif
|
#endif
|
/*
|
/*
|
* Clear the FIFO buffers and disable them
|
* Clear the FIFO buffers and disable them
|
* (they will be reenabled in change_speed())
|
* (they will be reenabled in change_speed())
|
*/
|
*/
|
|
|
if (info->tty)
|
if (info->tty)
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
/*
|
/*
|
* and set the speed of the serial port
|
* and set the speed of the serial port
|
*/
|
*/
|
|
|
uart_init(info);
|
uart_init(info);
|
set_ints_mode(1, info);
|
set_ints_mode(1, info);
|
change_speed(info);
|
change_speed(info);
|
|
|
info->flags |= S_INITIALIZED;
|
info->flags |= S_INITIALIZED;
|
restore_flags(flags);
|
restore_flags(flags);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine will shutdown a serial port; interrupts are disabled, and
|
* This routine will shutdown a serial port; interrupts are disabled, and
|
* DTR is dropped if the hangup on close termio flag is on.
|
* DTR is dropped if the hangup on close termio flag is on.
|
*/
|
*/
|
static void shutdown(struct trio_serial * info)
|
static void shutdown(struct trio_serial * info)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
|
|
tx_disable(info->uart);
|
tx_disable(info->uart);
|
rx_disable(info->uart);
|
rx_disable(info->uart);
|
rx_stop(info->uart); /* All off! */
|
rx_stop(info->uart); /* All off! */
|
if (!(info->flags & S_INITIALIZED))
|
if (!(info->flags & S_INITIALIZED))
|
return;
|
return;
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("Shutting down serial port %d (irq %d)....\n", info->line,
|
printk("Shutting down serial port %d (irq %d)....\n", info->line,
|
info->irq);
|
info->irq);
|
#endif
|
#endif
|
|
|
save_flags(flags); cli(); /* Disable interrupts */
|
save_flags(flags); cli(); /* Disable interrupts */
|
|
|
if (info->xmit_buf) {
|
if (info->xmit_buf) {
|
free_page((unsigned long) info->xmit_buf);
|
free_page((unsigned long) info->xmit_buf);
|
info->xmit_buf = 0;
|
info->xmit_buf = 0;
|
}
|
}
|
|
|
if (info->tty)
|
if (info->tty)
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
info->flags &= ~S_INITIALIZED;
|
info->flags &= ~S_INITIALIZED;
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
/* rate = 1036800 / ((65 - prescale) * (1<<divider)) */
|
/* rate = 1036800 / ((65 - prescale) * (1<<divider)) */
|
|
|
static int baud_table[] = {
|
static int baud_table[] = {
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
|
9600, 19200, 38400, 57600, 115200, 0 };
|
9600, 19200, 38400, 57600, 115200, 0 };
|
|
|
/*
|
/*
|
* This routine is called to set the UART divisor registers to match
|
* This routine is called to set the UART divisor registers to match
|
* the specified baud rate for a serial port.
|
* the specified baud rate for a serial port.
|
*/
|
*/
|
static void change_speed(struct trio_serial *info)
|
static void change_speed(struct trio_serial *info)
|
{
|
{
|
unsigned cflag;
|
unsigned cflag;
|
int i;
|
int i;
|
|
|
if (!info->tty || !info->tty->termios)
|
if (!info->tty || !info->tty->termios)
|
return;
|
return;
|
cflag = info->tty->termios->c_cflag;
|
cflag = info->tty->termios->c_cflag;
|
|
|
/* First disable the interrupts */
|
/* First disable the interrupts */
|
tx_stop(info->uart);
|
tx_stop(info->uart);
|
rx_stop(info->uart);
|
rx_stop(info->uart);
|
/* set the baudrate */
|
/* set the baudrate */
|
i = cflag & CBAUD;
|
i = cflag & CBAUD;
|
|
|
info->baud = baud_table[i];
|
info->baud = baud_table[i];
|
uart_speed(info, cflag);
|
uart_speed(info, cflag);
|
start_rx(info);
|
start_rx(info);
|
tx_start(info->uart, info->use_ints);
|
tx_start(info->uart, info->use_ints);
|
return;
|
return;
|
}
|
}
|
static void start_rx(struct trio_serial *info){
|
static void start_rx(struct trio_serial *info){
|
struct uart_regs *uart = info->uart;
|
struct uart_regs *uart = info->uart;
|
uart->rcr = (u_32)RX_SERIAL_SIZE;
|
uart->rcr = (u_32)RX_SERIAL_SIZE;
|
uart->rpr = (u_32)info->rx_buf;
|
uart->rpr = (u_32)info->rx_buf;
|
rx_start(uart, info->use_ints);
|
rx_start(uart, info->use_ints);
|
}
|
}
|
static void xmit_char(struct trio_serial *info, char ch){
|
static void xmit_char(struct trio_serial *info, char ch){
|
prompt0 = ch;
|
prompt0 = ch;
|
xmit_string(info, &prompt0, 1);
|
xmit_string(info, &prompt0, 1);
|
}
|
}
|
static void xmit_string(struct trio_serial *info, char *p, int len){
|
static void xmit_string(struct trio_serial *info, char *p, int len){
|
info->uart->tcr = (u_32)len;
|
info->uart->tcr = (u_32)len;
|
info->uart->tpr = (u_32)p;
|
info->uart->tpr = (u_32)p;
|
tx_start(info->uart, info->use_ints);
|
tx_start(info->uart, info->use_ints);
|
}
|
}
|
|
|
#if 0
|
#if 0
|
/* These are for receiving and sending characters under the kgdb
|
/* These are for receiving and sending characters under the kgdb
|
* source level kernel debugger.
|
* source level kernel debugger.
|
*/
|
*/
|
void putDebugChar(char kgdb_char)
|
void putDebugChar(char kgdb_char)
|
{
|
{
|
struct sun_zschannel *chan = trio_kgdbchan;
|
struct sun_zschannel *chan = trio_kgdbchan;
|
|
|
while((chan->control & Tx_BUF_EMP)==0)
|
while((chan->control & Tx_BUF_EMP)==0)
|
udelay(5);
|
udelay(5);
|
|
|
chan->data = kgdb_char;
|
chan->data = kgdb_char;
|
}
|
}
|
|
|
char getDebugChar(void)
|
char getDebugChar(void)
|
{
|
{
|
struct sun_zschannel *chan = trio_kgdbchan;
|
struct sun_zschannel *chan = trio_kgdbchan;
|
|
|
while((chan->control & Rx_CH_AV)==0)
|
while((chan->control & Rx_CH_AV)==0)
|
barrier();
|
barrier();
|
return chan->data;
|
return chan->data;
|
}
|
}
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Fair output driver allows a process to speak.
|
* Fair output driver allows a process to speak.
|
*/
|
*/
|
static void rs_fair_output( struct trio_serial *info)
|
static void rs_fair_output( struct trio_serial *info)
|
{
|
{
|
int left; /* Output no more than that */
|
int left; /* Output no more than that */
|
unsigned long flags;
|
unsigned long flags;
|
char c;
|
char c;
|
|
|
if (info == 0) return;
|
if (info == 0) return;
|
if (info->xmit_buf == 0) return;
|
if (info->xmit_buf == 0) return;
|
|
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
left = info->xmit_cnt;
|
left = info->xmit_cnt;
|
while (left != 0) {
|
while (left != 0) {
|
c = info->xmit_buf[info->xmit_tail];
|
c = info->xmit_buf[info->xmit_tail];
|
info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt--;
|
info->xmit_cnt--;
|
restore_flags(flags);
|
restore_flags(flags);
|
|
|
rs_put_char(info, c);
|
rs_put_char(info, c);
|
|
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
left = MIN(info->xmit_cnt, left-1);
|
left = MIN(info->xmit_cnt, left-1);
|
}
|
}
|
|
|
/* Last character is being transmitted now (hopefully). */
|
/* Last character is being transmitted now (hopefully). */
|
// udelay(20);
|
// udelay(20);
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* trio_console_print is registered for printk.
|
* trio_console_print is registered for printk.
|
*/
|
*/
|
static int console_initialized = 0;
|
static int console_initialized = 0;
|
static void init_console(void){
|
static void init_console(void){
|
struct trio_serial *info;
|
struct trio_serial *info;
|
info = &trio_info[0];
|
info = &trio_info[0];
|
memset(info, 0, sizeof(struct trio_serial));
|
memset(info, 0, sizeof(struct trio_serial));
|
#if 0
|
#if 0
|
info->uart = uarts[0];
|
info->uart = uarts[0];
|
#else
|
#else
|
info->uart = (struct uart_regs*)USARTA_BASE;
|
info->uart = (struct uart_regs*)USARTA_BASE;
|
#endif
|
#endif
|
info->tty = 0;
|
info->tty = 0;
|
info->irqmask = AIC_UA;
|
info->irqmask = AIC_UA;
|
info->irq = IRQ_USARTA;
|
info->irq = IRQ_USARTA;
|
info->port = 1;
|
info->port = 1;
|
info->use_ints = 0;
|
info->use_ints = 0;
|
info->is_cons = 1;
|
info->is_cons = 1;
|
console_initialized = 1;
|
console_initialized = 1;
|
}
|
}
|
void console_print_trio(const char *p)
|
void console_print_trio(const char *p)
|
{
|
{
|
char c;
|
char c;
|
struct trio_serial *info;
|
struct trio_serial *info;
|
info = &trio_info[0];
|
info = &trio_info[0];
|
|
|
// if (!(info->flags & S_INITIALIZED)){
|
// if (!(info->flags & S_INITIALIZED)){
|
if(!console_initialized){
|
if(!console_initialized){
|
init_console();
|
init_console();
|
uart_init(info);
|
uart_init(info);
|
info->baud = 9600;
|
info->baud = 9600;
|
uart_speed(info,0xffff);
|
uart_speed(info,0xffff);
|
}
|
}
|
while((c=*(p++)) != 0) {
|
while((c=*(p++)) != 0) {
|
if(c == '\n')
|
if(c == '\n')
|
rs_put_char(info, '\r');
|
rs_put_char(info, '\r');
|
rs_put_char(info, c);
|
rs_put_char(info, c);
|
}
|
}
|
|
|
/* Comment this if you want to have a strict interrupt-driven output */
|
/* Comment this if you want to have a strict interrupt-driven output */
|
// if (!info->use_ints)
|
// if (!info->use_ints)
|
// rs_fair_output(info);
|
// rs_fair_output(info);
|
|
|
return;
|
return;
|
}
|
}
|
|
|
static void rs_set_ldisc(struct tty_struct *tty)
|
static void rs_set_ldisc(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_set_ldisc"))
|
if (serial_paranoia_check(info, tty->device, "rs_set_ldisc"))
|
return;
|
return;
|
|
|
info->is_cons = (tty->termios->c_line == N_TTY);
|
info->is_cons = (tty->termios->c_line == N_TTY);
|
|
|
printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off");
|
printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off");
|
}
|
}
|
|
|
static void rs_flush_chars(struct tty_struct *tty)
|
static void rs_flush_chars(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
|
if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
|
return;
|
return;
|
if(!info->use_ints){
|
if(!info->use_ints){
|
for(;;) {
|
for(;;) {
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
!info->xmit_buf)
|
!info->xmit_buf)
|
return;
|
return;
|
|
|
/* Enable transmitter */
|
/* Enable transmitter */
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
tx_start(info->uart,info->use_ints);
|
tx_start(info->uart,info->use_ints);
|
}
|
}
|
}else{
|
}else{
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
!info->xmit_buf)
|
!info->xmit_buf)
|
return;
|
return;
|
|
|
/* Enable transmitter */
|
/* Enable transmitter */
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
tx_start(info->uart, info->use_ints);
|
tx_start(info->uart, info->use_ints);
|
}
|
}
|
|
|
if(!info->use_ints)
|
if(!info->use_ints)
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
/* Send char */
|
/* Send char */
|
xmit_char(info, info->xmit_buf[info->xmit_tail++]);
|
xmit_char(info, info->xmit_buf[info->xmit_tail++]);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt--;
|
info->xmit_cnt--;
|
|
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
extern void console_printn(const char * b, int count);
|
extern void console_printn(const char * b, int count);
|
|
|
static int rs_write(struct tty_struct * tty, int from_user,
|
static int rs_write(struct tty_struct * tty, int from_user,
|
const unsigned char *buf, int count)
|
const unsigned char *buf, int count)
|
{
|
{
|
int c, total = 0;
|
int c, total = 0;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_write"))
|
if (serial_paranoia_check(info, tty->device, "rs_write"))
|
return 0;
|
return 0;
|
|
|
if (!tty || !info->xmit_buf)
|
if (!tty || !info->xmit_buf)
|
return 0;
|
return 0;
|
|
|
/*buf = "123456";
|
/*buf = "123456";
|
count = 6;
|
count = 6;
|
|
|
printk("Writing '%s' to serial port\n", buf);*/
|
printk("Writing '%s' to serial port\n", buf);*/
|
|
|
/*printk("rs_write of %d bytes\n", count);*/
|
/*printk("rs_write of %d bytes\n", count);*/
|
|
|
|
|
save_flags(flags);
|
save_flags(flags);
|
while (1) {
|
while (1) {
|
cli();
|
cli();
|
c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
if (c <= 0)
|
if (c <= 0)
|
break;
|
break;
|
|
|
if (from_user) {
|
if (from_user) {
|
down(&tmp_buf_sem);
|
down(&tmp_buf_sem);
|
memcpy_fromfs(tmp_buf, buf, c);
|
memcpy_fromfs(tmp_buf, buf, c);
|
|
|
#if 0 // HN already done
|
#if 0 // HN already done
|
c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
#endif
|
#endif
|
memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
|
memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
|
up(&tmp_buf_sem);
|
up(&tmp_buf_sem);
|
} else
|
} else
|
memcpy(info->xmit_buf + info->xmit_head, buf, c);
|
memcpy(info->xmit_buf + info->xmit_head, buf, c);
|
info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
|
info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt += c;
|
info->xmit_cnt += c;
|
restore_flags(flags);
|
restore_flags(flags);
|
buf += c;
|
buf += c;
|
count -= c;
|
count -= c;
|
total += c;
|
total += c;
|
}
|
}
|
|
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped ){
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped ){
|
/* Enable transmitter */
|
/* Enable transmitter */
|
|
|
cli();
|
cli();
|
/*printk("Enabling transmitter\n");*/
|
/*printk("Enabling transmitter\n");*/
|
|
|
if(!info->use_ints){
|
if(!info->use_ints){
|
while(info->xmit_cnt) {
|
while(info->xmit_cnt) {
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
/* Send char */
|
/* Send char */
|
xmit_char(info, info->xmit_buf[info->xmit_tail++]);
|
xmit_char(info, info->xmit_buf[info->xmit_tail++]);
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt--;
|
info->xmit_cnt--;
|
}
|
}
|
}else{
|
}else{
|
if (info->xmit_cnt){
|
if (info->xmit_cnt){
|
/* Send char */
|
/* Send char */
|
wait_EOT(info->uart);
|
wait_EOT(info->uart);
|
xmit_string(info, &info->xmit_buf[info->xmit_tail], info->xmit_cnt);
|
xmit_string(info, &info->xmit_buf[info->xmit_tail], info->xmit_cnt);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt=0;
|
info->xmit_cnt=0;
|
}
|
}
|
}
|
}
|
restore_flags(flags);
|
restore_flags(flags);
|
} else {
|
} else {
|
/*printk("Skipping transmit\n");*/
|
/*printk("Skipping transmit\n");*/
|
}
|
}
|
|
|
|
|
#if 0
|
#if 0
|
printk("Enabling stuff anyhow\n");
|
printk("Enabling stuff anyhow\n");
|
tx_start(0);
|
tx_start(0);
|
|
|
if (SCC_EOT(0,0)) {
|
if (SCC_EOT(0,0)) {
|
printk("TX FIFO empty.\n");
|
printk("TX FIFO empty.\n");
|
/* Send char */
|
/* Send char */
|
trio_xmit_char(info->uart, info->xmit_buf[info->xmit_tail++]);
|
trio_xmit_char(info->uart, info->xmit_buf[info->xmit_tail++]);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
info->xmit_cnt--;
|
info->xmit_cnt--;
|
}
|
}
|
#endif
|
#endif
|
|
|
restore_flags(flags);
|
restore_flags(flags);
|
return total;
|
return total;
|
}
|
}
|
|
|
static int rs_write_room(struct tty_struct *tty)
|
static int rs_write_room(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
int ret;
|
int ret;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_write_room"))
|
if (serial_paranoia_check(info, tty->device, "rs_write_room"))
|
return 0;
|
return 0;
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
if (ret < 0)
|
if (ret < 0)
|
ret = 0;
|
ret = 0;
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static int rs_chars_in_buffer(struct tty_struct *tty)
|
static int rs_chars_in_buffer(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
|
if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
|
return 0;
|
return 0;
|
return info->xmit_cnt;
|
return info->xmit_cnt;
|
}
|
}
|
|
|
static void rs_flush_buffer(struct tty_struct *tty)
|
static void rs_flush_buffer(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
|
if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
|
return;
|
return;
|
cli();
|
cli();
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
sti();
|
sti();
|
wake_up_interruptible(&tty->write_wait);
|
wake_up_interruptible(&tty->write_wait);
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
tty->ldisc.write_wakeup)
|
tty->ldisc.write_wakeup)
|
(tty->ldisc.write_wakeup)(tty);
|
(tty->ldisc.write_wakeup)(tty);
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_throttle()
|
* rs_throttle()
|
*
|
*
|
* This routine is called by the upper-layer tty layer to signal that
|
* This routine is called by the upper-layer tty layer to signal that
|
* incoming characters should be throttled.
|
* incoming characters should be throttled.
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static void rs_throttle(struct tty_struct * tty)
|
static void rs_throttle(struct tty_struct * tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
#ifdef SERIAL_DEBUG_THROTTLE
|
#ifdef SERIAL_DEBUG_THROTTLE
|
char buf[64];
|
char buf[64];
|
|
|
printk("throttle %s: %d....\n", _tty_name(tty, buf),
|
printk("throttle %s: %d....\n", _tty_name(tty, buf),
|
tty->ldisc.chars_in_buffer(tty));
|
tty->ldisc.chars_in_buffer(tty));
|
#endif
|
#endif
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_throttle"))
|
if (serial_paranoia_check(info, tty->device, "rs_throttle"))
|
return;
|
return;
|
|
|
if (I_IXOFF(tty))
|
if (I_IXOFF(tty))
|
info->x_char = STOP_CHAR(tty);
|
info->x_char = STOP_CHAR(tty);
|
|
|
/* Turn off RTS line (do this atomic) */
|
/* Turn off RTS line (do this atomic) */
|
}
|
}
|
|
|
static void rs_unthrottle(struct tty_struct * tty)
|
static void rs_unthrottle(struct tty_struct * tty)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
#ifdef SERIAL_DEBUG_THROTTLE
|
#ifdef SERIAL_DEBUG_THROTTLE
|
char buf[64];
|
char buf[64];
|
|
|
printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
|
printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
|
tty->ldisc.chars_in_buffer(tty));
|
tty->ldisc.chars_in_buffer(tty));
|
#endif
|
#endif
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
|
if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
|
return;
|
return;
|
|
|
if (I_IXOFF(tty)) {
|
if (I_IXOFF(tty)) {
|
if (info->x_char)
|
if (info->x_char)
|
info->x_char = 0;
|
info->x_char = 0;
|
else
|
else
|
info->x_char = START_CHAR(tty);
|
info->x_char = START_CHAR(tty);
|
}
|
}
|
|
|
/* Assert RTS line (do this atomic) */
|
/* Assert RTS line (do this atomic) */
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_ioctl() and friends
|
* rs_ioctl() and friends
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
|
|
static int get_serial_info(struct trio_serial * info,
|
static int get_serial_info(struct trio_serial * info,
|
struct serial_struct * retinfo)
|
struct serial_struct * retinfo)
|
{
|
{
|
struct serial_struct tmp;
|
struct serial_struct tmp;
|
|
|
if (!retinfo)
|
if (!retinfo)
|
return -EFAULT;
|
return -EFAULT;
|
memset(&tmp, 0, sizeof(tmp));
|
memset(&tmp, 0, sizeof(tmp));
|
tmp.type = info->type;
|
tmp.type = info->type;
|
tmp.line = info->line;
|
tmp.line = info->line;
|
tmp.irq = info->irq;
|
tmp.irq = info->irq;
|
tmp.port = info->port;
|
tmp.port = info->port;
|
tmp.flags = info->flags;
|
tmp.flags = info->flags;
|
tmp.baud_base = info->baud_base;
|
tmp.baud_base = info->baud_base;
|
tmp.close_delay = info->close_delay;
|
tmp.close_delay = info->close_delay;
|
tmp.closing_wait = info->closing_wait;
|
tmp.closing_wait = info->closing_wait;
|
tmp.custom_divisor = info->custom_divisor;
|
tmp.custom_divisor = info->custom_divisor;
|
memcpy_tofs(retinfo,&tmp,sizeof(*retinfo));
|
memcpy_tofs(retinfo,&tmp,sizeof(*retinfo));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int set_serial_info(struct trio_serial * info,
|
static int set_serial_info(struct trio_serial * info,
|
struct serial_struct * new_info)
|
struct serial_struct * new_info)
|
{
|
{
|
struct serial_struct new_serial;
|
struct serial_struct new_serial;
|
struct trio_serial old_info;
|
struct trio_serial old_info;
|
int retval = 0;
|
int retval = 0;
|
|
|
if (!new_info)
|
if (!new_info)
|
return -EFAULT;
|
return -EFAULT;
|
memcpy_fromfs(&new_serial,new_info,sizeof(new_serial));
|
memcpy_fromfs(&new_serial,new_info,sizeof(new_serial));
|
old_info = *info;
|
old_info = *info;
|
|
|
if (!suser()) {
|
if (!suser()) {
|
if ((new_serial.baud_base != info->baud_base) ||
|
if ((new_serial.baud_base != info->baud_base) ||
|
(new_serial.type != info->type) ||
|
(new_serial.type != info->type) ||
|
(new_serial.close_delay != info->close_delay) ||
|
(new_serial.close_delay != info->close_delay) ||
|
((new_serial.flags & ~S_USR_MASK) !=
|
((new_serial.flags & ~S_USR_MASK) !=
|
(info->flags & ~S_USR_MASK)))
|
(info->flags & ~S_USR_MASK)))
|
return -EPERM;
|
return -EPERM;
|
info->flags = ((info->flags & ~S_USR_MASK) |
|
info->flags = ((info->flags & ~S_USR_MASK) |
|
(new_serial.flags & S_USR_MASK));
|
(new_serial.flags & S_USR_MASK));
|
info->custom_divisor = new_serial.custom_divisor;
|
info->custom_divisor = new_serial.custom_divisor;
|
goto check_and_exit;
|
goto check_and_exit;
|
}
|
}
|
|
|
if (info->count > 1)
|
if (info->count > 1)
|
return -EBUSY;
|
return -EBUSY;
|
|
|
/*
|
/*
|
* OK, past this point, all the error checking has been done.
|
* OK, past this point, all the error checking has been done.
|
* At this point, we start making changes.....
|
* At this point, we start making changes.....
|
*/
|
*/
|
|
|
info->baud_base = new_serial.baud_base;
|
info->baud_base = new_serial.baud_base;
|
info->flags = ((info->flags & ~S_FLAGS) |
|
info->flags = ((info->flags & ~S_FLAGS) |
|
(new_serial.flags & S_FLAGS));
|
(new_serial.flags & S_FLAGS));
|
info->type = new_serial.type;
|
info->type = new_serial.type;
|
info->close_delay = new_serial.close_delay;
|
info->close_delay = new_serial.close_delay;
|
info->closing_wait = new_serial.closing_wait;
|
info->closing_wait = new_serial.closing_wait;
|
|
|
check_and_exit:
|
check_and_exit:
|
retval = startup(info);
|
retval = startup(info);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/*
|
/*
|
* get_lsr_info - get line status register info
|
* get_lsr_info - get line status register info
|
*
|
*
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
* is emptied. On bus types like RS485, the transmitter must
|
* is emptied. On bus types like RS485, the transmitter must
|
* release the bus after transmitting. This must be done when
|
* release the bus after transmitting. This must be done when
|
* the transmit shift register is empty, not be done when the
|
* the transmit shift register is empty, not be done when the
|
* transmit holding register is empty. This functionality
|
* transmit holding register is empty. This functionality
|
* allows an RS485 driver to be written in user space.
|
* allows an RS485 driver to be written in user space.
|
*/
|
*/
|
static int get_lsr_info(struct trio_serial * info, unsigned int *value)
|
static int get_lsr_info(struct trio_serial * info, unsigned int *value)
|
{
|
{
|
unsigned char status;
|
unsigned char status;
|
|
|
cli();
|
cli();
|
status = info->uart->csr;
|
status = info->uart->csr;
|
status &= US_TXEMPTY;
|
status &= US_TXEMPTY;
|
sti();
|
sti();
|
put_user(status,value);
|
put_user(status,value);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine sends a break character out the serial port.
|
* This routine sends a break character out the serial port.
|
*/
|
*/
|
static void send_break( struct trio_serial * info, int duration)
|
static void send_break( struct trio_serial * info, int duration)
|
{
|
{
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + duration;
|
current->timeout = jiffies + duration;
|
cli();
|
cli();
|
info->uart->cr |= US_STTBRK;
|
info->uart->cr |= US_STTBRK;
|
if(!info->use_ints){
|
if(!info->use_ints){
|
while(US_TXRDY != (info->uart->csr & US_TXRDY)){
|
while(US_TXRDY != (info->uart->csr & US_TXRDY)){
|
; // this takes max 2ms at 9600
|
; // this takes max 2ms at 9600
|
}
|
}
|
info->uart->cr |= US_STTBRK;
|
info->uart->cr |= US_STTBRK;
|
}
|
}
|
sti();
|
sti();
|
}
|
}
|
|
|
static int rs_ioctl(struct tty_struct *tty, struct file * file,
|
static int rs_ioctl(struct tty_struct *tty, struct file * file,
|
unsigned int cmd, unsigned long arg)
|
unsigned int cmd, unsigned long arg)
|
{
|
{
|
int error;
|
int error;
|
struct trio_serial * info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial * info = (struct trio_serial *)tty->driver_data;
|
int retval;
|
int retval;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
|
if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
|
return -ENODEV;
|
return -ENODEV;
|
|
|
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
|
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
|
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
|
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
|
(cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
|
(cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
return -EIO;
|
return -EIO;
|
}
|
}
|
|
|
switch (cmd) {
|
switch (cmd) {
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
retval = tty_check_change(tty);
|
retval = tty_check_change(tty);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
tty_wait_until_sent(tty, 0);
|
tty_wait_until_sent(tty, 0);
|
if (!arg)
|
if (!arg)
|
send_break(info, HZ/4); /* 1/4 second */
|
send_break(info, HZ/4); /* 1/4 second */
|
return 0;
|
return 0;
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
retval = tty_check_change(tty);
|
retval = tty_check_change(tty);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
tty_wait_until_sent(tty, 0);
|
tty_wait_until_sent(tty, 0);
|
send_break(info, arg ? arg*(HZ/10) : HZ/4);
|
send_break(info, arg ? arg*(HZ/10) : HZ/4);
|
return 0;
|
return 0;
|
case TIOCGSOFTCAR:
|
case TIOCGSOFTCAR:
|
error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
|
error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
put_fs_long(C_CLOCAL(tty) ? 1 : 0,
|
put_fs_long(C_CLOCAL(tty) ? 1 : 0,
|
(unsigned long *) arg);
|
(unsigned long *) arg);
|
return 0;
|
return 0;
|
case TIOCSSOFTCAR:
|
case TIOCSSOFTCAR:
|
arg = get_fs_long((unsigned long *) arg);
|
arg = get_fs_long((unsigned long *) arg);
|
tty->termios->c_cflag =
|
tty->termios->c_cflag =
|
((tty->termios->c_cflag & ~CLOCAL) |
|
((tty->termios->c_cflag & ~CLOCAL) |
|
(arg ? CLOCAL : 0));
|
(arg ? CLOCAL : 0));
|
return 0;
|
return 0;
|
case TIOCGSERIAL:
|
case TIOCGSERIAL:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct serial_struct));
|
sizeof(struct serial_struct));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
return get_serial_info(info,
|
return get_serial_info(info,
|
(struct serial_struct *) arg);
|
(struct serial_struct *) arg);
|
case TIOCSSERIAL:
|
case TIOCSSERIAL:
|
return set_serial_info(info,
|
return set_serial_info(info,
|
(struct serial_struct *) arg);
|
(struct serial_struct *) arg);
|
case TIOCSERGETLSR: /* Get line status register */
|
case TIOCSERGETLSR: /* Get line status register */
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(unsigned int));
|
sizeof(unsigned int));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
else
|
else
|
return get_lsr_info(info, (unsigned int *) arg);
|
return get_lsr_info(info, (unsigned int *) arg);
|
|
|
case TIOCSERGSTRUCT:
|
case TIOCSERGSTRUCT:
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
error = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct trio_serial));
|
sizeof(struct trio_serial));
|
if (error)
|
if (error)
|
return error;
|
return error;
|
memcpy_tofs((struct trio_serial *) arg,
|
memcpy_tofs((struct trio_serial *) arg,
|
info, sizeof(struct trio_serial));
|
info, sizeof(struct trio_serial));
|
return 0;
|
return 0;
|
|
|
default:
|
default:
|
return -ENOIOCTLCMD;
|
return -ENOIOCTLCMD;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
|
static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
|
{
|
{
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial *info = (struct trio_serial *)tty->driver_data;
|
|
|
if (tty->termios->c_cflag == old_termios->c_cflag)
|
if (tty->termios->c_cflag == old_termios->c_cflag)
|
return;
|
return;
|
|
|
change_speed(info);
|
change_speed(info);
|
|
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
tty->hw_stopped = 0;
|
tty->hw_stopped = 0;
|
rs_start(tty);
|
rs_start(tty);
|
}
|
}
|
|
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_close()
|
* rs_close()
|
*
|
*
|
* This routine is called when the serial port gets closed. First, we
|
* This routine is called when the serial port gets closed. First, we
|
* wait for the last remaining data to be sent. Then, we unlink its
|
* wait for the last remaining data to be sent. Then, we unlink its
|
* S structure from the interrupt chain if necessary, and we free
|
* S structure from the interrupt chain if necessary, and we free
|
* that IRQ if nothing is left in the chain.
|
* that IRQ if nothing is left in the chain.
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static void rs_close(struct tty_struct *tty, struct file * filp)
|
static void rs_close(struct tty_struct *tty, struct file * filp)
|
{
|
{
|
struct trio_serial * info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial * info = (struct trio_serial *)tty->driver_data;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
|
if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
|
return;
|
return;
|
|
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
|
|
if (tty_hung_up_p(filp)) {
|
if (tty_hung_up_p(filp)) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_close ttyS%d, count = %d\n", info->line, info->count);
|
printk("rs_close ttyS%d, count = %d\n", info->line, info->count);
|
#endif
|
#endif
|
if ((tty->count == 1) && (info->count != 1)) {
|
if ((tty->count == 1) && (info->count != 1)) {
|
/*
|
/*
|
* Uh, oh. tty->count is 1, which means that the tty
|
* Uh, oh. tty->count is 1, which means that the tty
|
* structure will be freed. Info->count should always
|
* structure will be freed. Info->count should always
|
* be one in these conditions. If it's greater than
|
* be one in these conditions. If it's greater than
|
* one, we've got real problems, since it means the
|
* one, we've got real problems, since it means the
|
* serial port won't be shutdown.
|
* serial port won't be shutdown.
|
*/
|
*/
|
printk("rs_close: bad serial port count; tty->count is 1, "
|
printk("rs_close: bad serial port count; tty->count is 1, "
|
"info->count is %d\n", info->count);
|
"info->count is %d\n", info->count);
|
info->count = 1;
|
info->count = 1;
|
}
|
}
|
if (--info->count < 0) {
|
if (--info->count < 0) {
|
printk("rs_close: bad serial port count for ttyS%d: %d\n",
|
printk("rs_close: bad serial port count for ttyS%d: %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
info->count = 0;
|
info->count = 0;
|
}
|
}
|
if (info->count) {
|
if (info->count) {
|
restore_flags(flags);
|
restore_flags(flags);
|
return;
|
return;
|
}
|
}
|
// closing port so disable interrupts
|
// closing port so disable interrupts
|
set_ints_mode(0, info);
|
set_ints_mode(0, info);
|
|
|
info->flags |= S_CLOSING;
|
info->flags |= S_CLOSING;
|
/*
|
/*
|
* Save the termios structure, since this port may have
|
* Save the termios structure, since this port may have
|
* separate termios for callout and dialin.
|
* separate termios for callout and dialin.
|
*/
|
*/
|
if (info->flags & S_NORMAL_ACTIVE)
|
if (info->flags & S_NORMAL_ACTIVE)
|
info->normal_termios = *tty->termios;
|
info->normal_termios = *tty->termios;
|
if (info->flags & S_CALLOUT_ACTIVE)
|
if (info->flags & S_CALLOUT_ACTIVE)
|
info->callout_termios = *tty->termios;
|
info->callout_termios = *tty->termios;
|
/*
|
/*
|
* Now we wait for the transmit buffer to clear; and we notify
|
* Now we wait for the transmit buffer to clear; and we notify
|
* the line discipline to only process XON/XOFF characters.
|
* the line discipline to only process XON/XOFF characters.
|
*/
|
*/
|
tty->closing = 1;
|
tty->closing = 1;
|
if (info->closing_wait != S_CLOSING_WAIT_NONE)
|
if (info->closing_wait != S_CLOSING_WAIT_NONE)
|
tty_wait_until_sent(tty, info->closing_wait);
|
tty_wait_until_sent(tty, info->closing_wait);
|
/*
|
/*
|
* At this point we stop accepting input. To do this, we
|
* At this point we stop accepting input. To do this, we
|
* disable the receive line status interrupts, and tell the
|
* disable the receive line status interrupts, and tell the
|
* interrupt driver to stop checking the data ready bit in the
|
* interrupt driver to stop checking the data ready bit in the
|
* line status register.
|
* line status register.
|
*/
|
*/
|
|
|
shutdown(info);
|
shutdown(info);
|
if (tty->driver.flush_buffer)
|
if (tty->driver.flush_buffer)
|
tty->driver.flush_buffer(tty);
|
tty->driver.flush_buffer(tty);
|
if (tty->ldisc.flush_buffer)
|
if (tty->ldisc.flush_buffer)
|
tty->ldisc.flush_buffer(tty);
|
tty->ldisc.flush_buffer(tty);
|
tty->closing = 0;
|
tty->closing = 0;
|
info->event = 0;
|
info->event = 0;
|
info->tty = 0;
|
info->tty = 0;
|
if (tty->ldisc.num != ldiscs[N_TTY].num) {
|
if (tty->ldisc.num != ldiscs[N_TTY].num) {
|
if (tty->ldisc.close)
|
if (tty->ldisc.close)
|
(tty->ldisc.close)(tty);
|
(tty->ldisc.close)(tty);
|
tty->ldisc = ldiscs[N_TTY];
|
tty->ldisc = ldiscs[N_TTY];
|
tty->termios->c_line = N_TTY;
|
tty->termios->c_line = N_TTY;
|
if (tty->ldisc.open)
|
if (tty->ldisc.open)
|
(tty->ldisc.open)(tty);
|
(tty->ldisc.open)(tty);
|
}
|
}
|
if (info->blocked_open) {
|
if (info->blocked_open) {
|
if (info->close_delay) {
|
if (info->close_delay) {
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + info->close_delay;
|
current->timeout = jiffies + info->close_delay;
|
schedule();
|
schedule();
|
}
|
}
|
wake_up_interruptible(&info->open_wait);
|
wake_up_interruptible(&info->open_wait);
|
}
|
}
|
info->flags &= ~(S_NORMAL_ACTIVE|S_CALLOUT_ACTIVE|
|
info->flags &= ~(S_NORMAL_ACTIVE|S_CALLOUT_ACTIVE|
|
S_CLOSING);
|
S_CLOSING);
|
wake_up_interruptible(&info->close_wait);
|
wake_up_interruptible(&info->close_wait);
|
restore_flags(flags);
|
restore_flags(flags);
|
}
|
}
|
|
|
/*
|
/*
|
* rs_hangup() --- called by tty_hangup() when a hangup is signaled.
|
* rs_hangup() --- called by tty_hangup() when a hangup is signaled.
|
*/
|
*/
|
void rs_hangup(struct tty_struct *tty)
|
void rs_hangup(struct tty_struct *tty)
|
{
|
{
|
struct trio_serial * info = (struct trio_serial *)tty->driver_data;
|
struct trio_serial * info = (struct trio_serial *)tty->driver_data;
|
|
|
if (serial_paranoia_check(info, tty->device, "rs_hangup"))
|
if (serial_paranoia_check(info, tty->device, "rs_hangup"))
|
return;
|
return;
|
|
|
rs_flush_buffer(tty);
|
rs_flush_buffer(tty);
|
shutdown(info);
|
shutdown(info);
|
info->event = 0;
|
info->event = 0;
|
info->count = 0;
|
info->count = 0;
|
info->flags &= ~(S_NORMAL_ACTIVE|S_CALLOUT_ACTIVE);
|
info->flags &= ~(S_NORMAL_ACTIVE|S_CALLOUT_ACTIVE);
|
info->tty = 0;
|
info->tty = 0;
|
wake_up_interruptible(&info->open_wait);
|
wake_up_interruptible(&info->open_wait);
|
}
|
}
|
|
|
/*
|
/*
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
* rs_open() and friends
|
* rs_open() and friends
|
* ------------------------------------------------------------
|
* ------------------------------------------------------------
|
*/
|
*/
|
static int block_til_ready(struct tty_struct *tty, struct file * filp,
|
static int block_til_ready(struct tty_struct *tty, struct file * filp,
|
struct trio_serial *info)
|
struct trio_serial *info)
|
{
|
{
|
struct wait_queue wait = { current, NULL };
|
struct wait_queue wait = { current, NULL };
|
int retval;
|
int retval;
|
int do_clocal = 0;
|
int do_clocal = 0;
|
|
|
/*
|
/*
|
* If the device is in the middle of being closed, then block
|
* If the device is in the middle of being closed, then block
|
* until it's done, and then try again.
|
* until it's done, and then try again.
|
*/
|
*/
|
if (info->flags & S_CLOSING) {
|
if (info->flags & S_CLOSING) {
|
interruptible_sleep_on(&info->close_wait);
|
interruptible_sleep_on(&info->close_wait);
|
#ifdef SERIAL_DO_RESTART
|
#ifdef SERIAL_DO_RESTART
|
if (info->flags & S_HUP_NOTIFY)
|
if (info->flags & S_HUP_NOTIFY)
|
return -EAGAIN;
|
return -EAGAIN;
|
else
|
else
|
return -ERESTARTSYS;
|
return -ERESTARTSYS;
|
#else
|
#else
|
return -EAGAIN;
|
return -EAGAIN;
|
#endif
|
#endif
|
}
|
}
|
|
|
/*
|
/*
|
* If this is a callout device, then just make sure the normal
|
* If this is a callout device, then just make sure the normal
|
* device isn't being used.
|
* device isn't being used.
|
*/
|
*/
|
if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
|
if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
|
if (info->flags & S_NORMAL_ACTIVE)
|
if (info->flags & S_NORMAL_ACTIVE)
|
return -EBUSY;
|
return -EBUSY;
|
if ((info->flags & S_CALLOUT_ACTIVE) &&
|
if ((info->flags & S_CALLOUT_ACTIVE) &&
|
(info->flags & S_SESSION_LOCKOUT) &&
|
(info->flags & S_SESSION_LOCKOUT) &&
|
(info->session != current->session))
|
(info->session != current->session))
|
return -EBUSY;
|
return -EBUSY;
|
if ((info->flags & S_CALLOUT_ACTIVE) &&
|
if ((info->flags & S_CALLOUT_ACTIVE) &&
|
(info->flags & S_PGRP_LOCKOUT) &&
|
(info->flags & S_PGRP_LOCKOUT) &&
|
(info->pgrp != current->pgrp))
|
(info->pgrp != current->pgrp))
|
return -EBUSY;
|
return -EBUSY;
|
info->flags |= S_CALLOUT_ACTIVE;
|
info->flags |= S_CALLOUT_ACTIVE;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* If non-blocking mode is set, or the port is not enabled,
|
* If non-blocking mode is set, or the port is not enabled,
|
* then make the check up front and then exit.
|
* then make the check up front and then exit.
|
*/
|
*/
|
if ((filp->f_flags & O_NONBLOCK) ||
|
if ((filp->f_flags & O_NONBLOCK) ||
|
(tty->flags & (1 << TTY_IO_ERROR))) {
|
(tty->flags & (1 << TTY_IO_ERROR))) {
|
if (info->flags & S_CALLOUT_ACTIVE)
|
if (info->flags & S_CALLOUT_ACTIVE)
|
return -EBUSY;
|
return -EBUSY;
|
info->flags |= S_NORMAL_ACTIVE;
|
info->flags |= S_NORMAL_ACTIVE;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (info->flags & S_CALLOUT_ACTIVE) {
|
if (info->flags & S_CALLOUT_ACTIVE) {
|
if (info->normal_termios.c_cflag & CLOCAL)
|
if (info->normal_termios.c_cflag & CLOCAL)
|
do_clocal = 1;
|
do_clocal = 1;
|
} else {
|
} else {
|
if (tty->termios->c_cflag & CLOCAL)
|
if (tty->termios->c_cflag & CLOCAL)
|
do_clocal = 1;
|
do_clocal = 1;
|
}
|
}
|
|
|
/*
|
/*
|
* Block waiting for the carrier detect and the line to become
|
* Block waiting for the carrier detect and the line to become
|
* free (i.e., not in use by the callout). While we are in
|
* free (i.e., not in use by the callout). While we are in
|
* this loop, info->count is dropped by one, so that
|
* this loop, info->count is dropped by one, so that
|
* rs_close() knows when to free things. We restore it upon
|
* rs_close() knows when to free things. We restore it upon
|
* exit, either normal or abnormal.
|
* exit, either normal or abnormal.
|
*/
|
*/
|
retval = 0;
|
retval = 0;
|
add_wait_queue(&info->open_wait, &wait);
|
add_wait_queue(&info->open_wait, &wait);
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("block_til_ready before block: ttyS%d, count = %d\n",
|
printk("block_til_ready before block: ttyS%d, count = %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
#endif
|
#endif
|
info->count--;
|
info->count--;
|
info->blocked_open++;
|
info->blocked_open++;
|
while (1) {
|
while (1) {
|
cli();
|
cli();
|
if (!(info->flags & S_CALLOUT_ACTIVE))
|
if (!(info->flags & S_CALLOUT_ACTIVE))
|
trio_rtsdtr(info, 1);
|
trio_rtsdtr(info, 1);
|
sti();
|
sti();
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
if (tty_hung_up_p(filp) ||
|
if (tty_hung_up_p(filp) ||
|
!(info->flags & S_INITIALIZED)) {
|
!(info->flags & S_INITIALIZED)) {
|
#ifdef SERIAL_DO_RESTART
|
#ifdef SERIAL_DO_RESTART
|
if (info->flags & S_HUP_NOTIFY)
|
if (info->flags & S_HUP_NOTIFY)
|
retval = -EAGAIN;
|
retval = -EAGAIN;
|
else
|
else
|
retval = -ERESTARTSYS;
|
retval = -ERESTARTSYS;
|
#else
|
#else
|
retval = -EAGAIN;
|
retval = -EAGAIN;
|
#endif
|
#endif
|
break;
|
break;
|
}
|
}
|
if (!(info->flags & S_CALLOUT_ACTIVE) &&
|
if (!(info->flags & S_CALLOUT_ACTIVE) &&
|
!(info->flags & S_CLOSING) && do_clocal)
|
!(info->flags & S_CLOSING) && do_clocal)
|
break;
|
break;
|
if (current->signal & ~current->blocked) {
|
if (current->signal & ~current->blocked) {
|
retval = -ERESTARTSYS;
|
retval = -ERESTARTSYS;
|
break;
|
break;
|
}
|
}
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("block_til_ready blocking: ttyS%d, count = %d\n",
|
printk("block_til_ready blocking: ttyS%d, count = %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
#endif
|
#endif
|
schedule();
|
schedule();
|
}
|
}
|
current->state = TASK_RUNNING;
|
current->state = TASK_RUNNING;
|
remove_wait_queue(&info->open_wait, &wait);
|
remove_wait_queue(&info->open_wait, &wait);
|
if (!tty_hung_up_p(filp))
|
if (!tty_hung_up_p(filp))
|
info->count++;
|
info->count++;
|
info->blocked_open--;
|
info->blocked_open--;
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("block_til_ready after blocking: ttyS%d, count = %d\n",
|
printk("block_til_ready after blocking: ttyS%d, count = %d\n",
|
info->line, info->count);
|
info->line, info->count);
|
#endif
|
#endif
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
info->flags |= S_NORMAL_ACTIVE;
|
info->flags |= S_NORMAL_ACTIVE;
|
if(!info->use_ints){
|
if(!info->use_ints){
|
serialpoll.data = (void *)info;
|
serialpoll.data = (void *)info;
|
queue_task(&serialpoll, &tq_timer);
|
queue_task(&serialpoll, &tq_timer);
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* This routine is called whenever a serial port is opened. It
|
* This routine is called whenever a serial port is opened. It
|
* enables interrupts for a serial port, linking in its S structure into
|
* enables interrupts for a serial port, linking in its S structure into
|
* the IRQ chain. It also performs the serial-specific
|
* the IRQ chain. It also performs the serial-specific
|
* initialization for the tty structure.
|
* initialization for the tty structure.
|
*/
|
*/
|
int rs_open(struct tty_struct *tty, struct file * filp)
|
int rs_open(struct tty_struct *tty, struct file * filp)
|
{
|
{
|
struct trio_serial *info;
|
struct trio_serial *info;
|
int retval, line;
|
int retval, line;
|
|
|
line = MINOR(tty->device) - tty->driver.minor_start;
|
line = MINOR(tty->device) - tty->driver.minor_start;
|
|
|
if (line != 0) /* we have exactly one */
|
if (line != 0) /* we have exactly one */
|
return -ENODEV;
|
return -ENODEV;
|
|
|
info = &trio_info[0];
|
info = &trio_info[0];
|
#if 0
|
#if 0
|
/* Is the kgdb running over this line? */
|
/* Is the kgdb running over this line? */
|
if (info->kgdb_channel)
|
if (info->kgdb_channel)
|
return -ENODEV;
|
return -ENODEV;
|
#endif
|
#endif
|
if (serial_paranoia_check(info, tty->device, "rs_open"))
|
if (serial_paranoia_check(info, tty->device, "rs_open"))
|
return -ENODEV;
|
return -ENODEV;
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
|
printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
|
info->count);
|
info->count);
|
#endif
|
#endif
|
info->count++;
|
info->count++;
|
tty->driver_data = info;
|
tty->driver_data = info;
|
info->tty = tty;
|
info->tty = tty;
|
|
|
/*
|
/*
|
* Start up serial port
|
* Start up serial port
|
*/
|
*/
|
retval = startup(info);
|
retval = startup(info);
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
|
|
retval = block_til_ready(tty, filp, info);
|
retval = block_til_ready(tty, filp, info);
|
if (retval) {
|
if (retval) {
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_open returning after block_til_ready with %d\n",
|
printk("rs_open returning after block_til_ready with %d\n",
|
retval);
|
retval);
|
#endif
|
#endif
|
return retval;
|
return retval;
|
}
|
}
|
|
|
if ((info->count == 1) && (info->flags & S_SPLIT_TERMIOS)) {
|
if ((info->count == 1) && (info->flags & S_SPLIT_TERMIOS)) {
|
if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
|
if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
|
*tty->termios = info->normal_termios;
|
*tty->termios = info->normal_termios;
|
else
|
else
|
*tty->termios = info->callout_termios;
|
*tty->termios = info->callout_termios;
|
change_speed(info);
|
change_speed(info);
|
}
|
}
|
|
|
info->session = current->session;
|
info->session = current->session;
|
info->pgrp = current->pgrp;
|
info->pgrp = current->pgrp;
|
|
|
#ifdef SERIAL_DEBUG_OPEN
|
#ifdef SERIAL_DEBUG_OPEN
|
printk("rs_open ttyS%d successful...\n", info->line);
|
printk("rs_open ttyS%d successful...\n", info->line);
|
#endif
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
extern void register_console(void (*proc)(const char *));
|
extern void register_console(void (*proc)(const char *));
|
#if 0
|
#if 0
|
|
|
static inline void
|
static inline void
|
rs_cons_check(struct trio_serial *ss, int channel)
|
rs_cons_check(struct trio_serial *ss, int channel)
|
{
|
{
|
int i, o, io;
|
int i, o, io;
|
static consout_registered = 0;
|
static consout_registered = 0;
|
static msg_printed = 0;
|
static msg_printed = 0;
|
|
|
i = o = io = 0;
|
i = o = io = 0;
|
|
|
/* Is this one of the serial console lines? */
|
/* Is this one of the serial console lines? */
|
if((trio_cons_chanout != channel) &&
|
if((trio_cons_chanout != channel) &&
|
(trio_cons_chanin != channel))
|
(trio_cons_chanin != channel))
|
return;
|
return;
|
trio_conschan = ss->trio_channel;
|
trio_conschan = ss->trio_channel;
|
trio_consinfo = ss;
|
trio_consinfo = ss;
|
|
|
/* Register the console output putchar, if necessary */
|
/* Register the console output putchar, if necessary */
|
if((trio_cons_chanout == channel)) {
|
if((trio_cons_chanout == channel)) {
|
o = 1;
|
o = 1;
|
/* double whee.. */
|
/* double whee.. */
|
if(!consout_registered) {
|
if(!consout_registered) {
|
register_console(trio_console_print);
|
register_console(trio_console_print);
|
consout_registered = 1;
|
consout_registered = 1;
|
}
|
}
|
}
|
}
|
|
|
/* If this is console input, we handle the break received
|
/* If this is console input, we handle the break received
|
* status interrupt on this line to mean prom_halt().
|
* status interrupt on this line to mean prom_halt().
|
*/
|
*/
|
if(trio_cons_chanin == channel) {
|
if(trio_cons_chanin == channel) {
|
ss->break_abort = 1;
|
ss->break_abort = 1;
|
i = 1;
|
i = 1;
|
}
|
}
|
if(o && i)
|
if(o && i)
|
io = 1;
|
io = 1;
|
if(ss->baud != 9600)
|
if(ss->baud != 9600)
|
panic("Console baud rate weirdness");
|
panic("Console baud rate weirdness");
|
|
|
/* Set flag variable for this port so that it cannot be
|
/* Set flag variable for this port so that it cannot be
|
* opened for other uses by accident.
|
* opened for other uses by accident.
|
*/
|
*/
|
ss->is_cons = 1;
|
ss->is_cons = 1;
|
|
|
if(io) {
|
if(io) {
|
if(!msg_printed) {
|
if(!msg_printed) {
|
printk("zs%d: console I/O\n", ((channel>>1)&1));
|
printk("zs%d: console I/O\n", ((channel>>1)&1));
|
msg_printed = 1;
|
msg_printed = 1;
|
}
|
}
|
} else {
|
} else {
|
printk("zs%d: console %s\n", ((channel>>1)&1),
|
printk("zs%d: console %s\n", ((channel>>1)&1),
|
(i==1 ? "input" : (o==1 ? "output" : "WEIRD")));
|
(i==1 ? "input" : (o==1 ? "output" : "WEIRD")));
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
|
|
static struct irqaction irq_usarta = { rs_interrupta, 0, 0, "usarta", NULL, NULL};
|
static struct irqaction irq_usarta = { rs_interrupta, 0, 0, "usarta", NULL, NULL};
|
static struct irqaction irq_usartb = { rs_interruptb, 0, 0, "usartb", NULL, NULL};
|
static struct irqaction irq_usartb = { rs_interruptb, 0, 0, "usartb", NULL, NULL};
|
|
|
extern int setup_arm_irq(int, struct irqaction *);
|
extern int setup_arm_irq(int, struct irqaction *);
|
|
|
void interrupts_init(void)
|
void interrupts_init(void)
|
{
|
{
|
setup_arm_irq(IRQ_USARTA, &irq_usarta);
|
setup_arm_irq(IRQ_USARTA, &irq_usarta);
|
setup_arm_irq(IRQ_USARTB, &irq_usartb);
|
setup_arm_irq(IRQ_USARTB, &irq_usartb);
|
}
|
}
|
|
|
/* rs_init inits the driver */
|
/* rs_init inits the driver */
|
int rs_trio_init(void)
|
int rs_trio_init(void)
|
{
|
{
|
int flags,i;
|
int flags,i;
|
struct trio_serial *info;
|
struct trio_serial *info;
|
/* Setup base handler, and timer table. */
|
/* Setup base handler, and timer table. */
|
init_bh(SERIAL_BH, do_serial_bh);
|
init_bh(SERIAL_BH, do_serial_bh);
|
timer_table[RS_TIMER].fn = rs_timer;
|
timer_table[RS_TIMER].fn = rs_timer;
|
timer_table[RS_TIMER].expires = 0;
|
timer_table[RS_TIMER].expires = 0;
|
|
|
/* Initialize the tty_driver structure */
|
/* Initialize the tty_driver structure */
|
|
|
memset(&serial_driver, 0, sizeof(struct tty_driver));
|
memset(&serial_driver, 0, sizeof(struct tty_driver));
|
serial_driver.magic = TTY_DRIVER_MAGIC;
|
serial_driver.magic = TTY_DRIVER_MAGIC;
|
serial_driver.name = "ttyS";
|
serial_driver.name = "ttyS";
|
serial_driver.major = TTY_MAJOR;
|
serial_driver.major = TTY_MAJOR;
|
serial_driver.minor_start = 64;
|
serial_driver.minor_start = 64;
|
serial_driver.num = 1;
|
serial_driver.num = 1;
|
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
|
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
|
serial_driver.subtype = SERIAL_TYPE_NORMAL;
|
serial_driver.subtype = SERIAL_TYPE_NORMAL;
|
serial_driver.init_termios = tty_std_termios;
|
serial_driver.init_termios = tty_std_termios;
|
|
|
serial_driver.init_termios.c_cflag =
|
serial_driver.init_termios.c_cflag =
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
serial_driver.flags = TTY_DRIVER_REAL_RAW;
|
serial_driver.flags = TTY_DRIVER_REAL_RAW;
|
serial_driver.refcount = &serial_refcount;
|
serial_driver.refcount = &serial_refcount;
|
serial_driver.table = serial_table;
|
serial_driver.table = serial_table;
|
serial_driver.termios = serial_termios;
|
serial_driver.termios = serial_termios;
|
serial_driver.termios_locked = serial_termios_locked;
|
serial_driver.termios_locked = serial_termios_locked;
|
|
|
serial_driver.open = rs_open;
|
serial_driver.open = rs_open;
|
serial_driver.close = rs_close;
|
serial_driver.close = rs_close;
|
serial_driver.write = rs_write;
|
serial_driver.write = rs_write;
|
serial_driver.flush_chars = rs_flush_chars;
|
serial_driver.flush_chars = rs_flush_chars;
|
serial_driver.write_room = rs_write_room;
|
serial_driver.write_room = rs_write_room;
|
serial_driver.chars_in_buffer = rs_chars_in_buffer;
|
serial_driver.chars_in_buffer = rs_chars_in_buffer;
|
serial_driver.flush_buffer = rs_flush_buffer;
|
serial_driver.flush_buffer = rs_flush_buffer;
|
serial_driver.ioctl = rs_ioctl;
|
serial_driver.ioctl = rs_ioctl;
|
serial_driver.throttle = rs_throttle;
|
serial_driver.throttle = rs_throttle;
|
serial_driver.unthrottle = rs_unthrottle;
|
serial_driver.unthrottle = rs_unthrottle;
|
serial_driver.set_termios = rs_set_termios;
|
serial_driver.set_termios = rs_set_termios;
|
serial_driver.stop = rs_stop;
|
serial_driver.stop = rs_stop;
|
serial_driver.start = rs_start;
|
serial_driver.start = rs_start;
|
serial_driver.hangup = rs_hangup;
|
serial_driver.hangup = rs_hangup;
|
serial_driver.set_ldisc = rs_set_ldisc;
|
serial_driver.set_ldisc = rs_set_ldisc;
|
|
|
/*
|
/*
|
* The callout device is just like normal device except for
|
* The callout device is just like normal device except for
|
* major number and the subtype code.
|
* major number and the subtype code.
|
*/
|
*/
|
callout_driver = serial_driver;
|
callout_driver = serial_driver;
|
callout_driver.name = "cua";
|
callout_driver.name = "cua";
|
callout_driver.major = TTYAUX_MAJOR;
|
callout_driver.major = TTYAUX_MAJOR;
|
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
|
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
|
|
|
if (tty_register_driver(&serial_driver))
|
if (tty_register_driver(&serial_driver))
|
panic("Couldn't register serial driver\n");
|
panic("Couldn't register serial driver\n");
|
if (tty_register_driver(&callout_driver))
|
if (tty_register_driver(&callout_driver))
|
panic("Couldn't register callout driver\n");
|
panic("Couldn't register callout driver\n");
|
|
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
i=0;
|
i=0;
|
while(i<US_NB){
|
while(i<US_NB){
|
info = &trio_info[i];
|
info = &trio_info[i];
|
info->magic = SERIAL_MAGIC;
|
info->magic = SERIAL_MAGIC;
|
info->uart = uarts[i];
|
info->uart = uarts[i];
|
info->tty = 0;
|
info->tty = 0;
|
info->irqmask = (i)?AIC_UB:AIC_UA;
|
info->irqmask = (i)?AIC_UB:AIC_UA;
|
info->irq = (i)?IRQ_USARTB:IRQ_USARTA;
|
info->irq = (i)?IRQ_USARTB:IRQ_USARTA;
|
info->port = i+1;
|
info->port = i+1;
|
set_ints_mode(0,info);
|
set_ints_mode(0,info);
|
info->custom_divisor = 16;
|
info->custom_divisor = 16;
|
info->close_delay = 50;
|
info->close_delay = 50;
|
info->closing_wait = 3000;
|
info->closing_wait = 3000;
|
info->x_char = 0;
|
info->x_char = 0;
|
info->event = 0;
|
info->event = 0;
|
info->count = 0;
|
info->count = 0;
|
info->blocked_open = 0;
|
info->blocked_open = 0;
|
info->tqueue.routine = do_softint;
|
info->tqueue.routine = do_softint;
|
info->tqueue.data = info;
|
info->tqueue.data = info;
|
info->tqueue_hangup.routine = do_serial_hangup;
|
info->tqueue_hangup.routine = do_serial_hangup;
|
info->tqueue_hangup.data = info;
|
info->tqueue_hangup.data = info;
|
info->callout_termios =callout_driver.init_termios;
|
info->callout_termios =callout_driver.init_termios;
|
info->normal_termios = serial_driver.init_termios;
|
info->normal_termios = serial_driver.init_termios;
|
info->open_wait = 0;
|
info->open_wait = 0;
|
info->close_wait = 0;
|
info->close_wait = 0;
|
info->line = 0;
|
info->line = 0;
|
info->is_cons = (i)?0:1; /* Means shortcuts work */
|
info->is_cons = (i)?0:1; /* Means shortcuts work */
|
i++;
|
i++;
|
}
|
}
|
interrupts_init();
|
interrupts_init();
|
restore_flags(flags);
|
restore_flags(flags);
|
// hack to do polling
|
// hack to do polling
|
serialpoll.routine = serpoll;
|
serialpoll.routine = serpoll;
|
serialpoll.data = 0;
|
serialpoll.data = 0;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* register_serial and unregister_serial allows for serial ports to be
|
* register_serial and unregister_serial allows for serial ports to be
|
* configured at run-time, to support PCMCIA modems.
|
* configured at run-time, to support PCMCIA modems.
|
*/
|
*/
|
/* SPARC: Unused at this time, just here to make things link. */
|
/* SPARC: Unused at this time, just here to make things link. */
|
int register_serial(struct serial_struct *req)
|
int register_serial(struct serial_struct *req)
|
{
|
{
|
return -1;
|
return -1;
|
}
|
}
|
|
|
void unregister_serial(int line)
|
void unregister_serial(int line)
|
{
|
{
|
return;
|
return;
|
}
|
}
|
|
|
#if 0
|
#if 0
|
/* Hooks for running a serial console. con_init() calls this if the
|
/* Hooks for running a serial console. con_init() calls this if the
|
* console is being run over one of the ttya/ttyb serial ports.
|
* console is being run over one of the ttya/ttyb serial ports.
|
* 'chip' should be zero, as chip 1 drives the mouse/keyboard.
|
* 'chip' should be zero, as chip 1 drives the mouse/keyboard.
|
* 'channel' is decoded as 0=TTYA 1=TTYB, note that the channels
|
* 'channel' is decoded as 0=TTYA 1=TTYB, note that the channels
|
* are addressed backwards, channel B is first, then channel A.
|
* are addressed backwards, channel B is first, then channel A.
|
*/
|
*/
|
void
|
void
|
rs_cons_hook(int chip, int out, int channel)
|
rs_cons_hook(int chip, int out, int channel)
|
{
|
{
|
if(chip)
|
if(chip)
|
panic("rs_cons_hook called with chip not zero");
|
panic("rs_cons_hook called with chip not zero");
|
if(!trio_chips[chip]) {
|
if(!trio_chips[chip]) {
|
trio_chips[chip] = get_zs(chip);
|
trio_chips[chip] = get_zs(chip);
|
/* Two channels per chip */
|
/* Two channels per chip */
|
trio_channels[(chip*2)] = &trio_chips[chip]->channelA;
|
trio_channels[(chip*2)] = &trio_chips[chip]->channelA;
|
trio_channels[(chip*2)+1] = &trio_chips[chip]->channelB;
|
trio_channels[(chip*2)+1] = &trio_chips[chip]->channelB;
|
}
|
}
|
trio_info[channel].trio_channel = trio_channels[channel];
|
trio_info[channel].trio_channel = trio_channels[channel];
|
trio_info[channel].change_needed = 0;
|
trio_info[channel].change_needed = 0;
|
trio_info[channel].clk_divisor = 16;
|
trio_info[channel].clk_divisor = 16;
|
trio_info[channel].trio_baud = get_zsbaud(&trio_info[channel]);
|
trio_info[channel].trio_baud = get_zsbaud(&trio_info[channel]);
|
rs_cons_check(&trio_info[channel], channel);
|
rs_cons_check(&trio_info[channel], channel);
|
if(out)
|
if(out)
|
trio_cons_chanout = ((chip * 2) + channel);
|
trio_cons_chanout = ((chip * 2) + channel);
|
else
|
else
|
trio_cons_chanin = ((chip * 2) + channel);
|
trio_cons_chanin = ((chip * 2) + channel);
|
|
|
}
|
}
|
|
|
/* This is called at boot time to prime the kgdb serial debugging
|
/* This is called at boot time to prime the kgdb serial debugging
|
* serial line. The 'tty_num' argument is 0 for /dev/ttya and 1
|
* serial line. The 'tty_num' argument is 0 for /dev/ttya and 1
|
* for /dev/ttyb which is determined in setup_arch() from the
|
* for /dev/ttyb which is determined in setup_arch() from the
|
* boot command line flags.
|
* boot command line flags.
|
*/
|
*/
|
void
|
void
|
rs_kgdb_hook(int tty_num)
|
rs_kgdb_hook(int tty_num)
|
{
|
{
|
int chip = 0;
|
int chip = 0;
|
|
|
if(!trio_chips[chip]) {
|
if(!trio_chips[chip]) {
|
trio_chips[chip] = get_zs(chip);
|
trio_chips[chip] = get_zs(chip);
|
/* Two channels per chip */
|
/* Two channels per chip */
|
trio_channels[(chip*2)] = &trio_chips[chip]->channelA;
|
trio_channels[(chip*2)] = &trio_chips[chip]->channelA;
|
trio_channels[(chip*2)+1] = &trio_chips[chip]->channelB;
|
trio_channels[(chip*2)+1] = &trio_chips[chip]->channelB;
|
}
|
}
|
trio_info[tty_num].trio_channel = trio_channels[tty_num];
|
trio_info[tty_num].trio_channel = trio_channels[tty_num];
|
trio_kgdbchan = trio_info[tty_num].trio_channel;
|
trio_kgdbchan = trio_info[tty_num].trio_channel;
|
trio_info[tty_num].change_needed = 0;
|
trio_info[tty_num].change_needed = 0;
|
trio_info[tty_num].clk_divisor = 16;
|
trio_info[tty_num].clk_divisor = 16;
|
trio_info[tty_num].trio_baud = get_zsbaud(&trio_info[tty_num]);
|
trio_info[tty_num].trio_baud = get_zsbaud(&trio_info[tty_num]);
|
trio_info[tty_num].kgdb_channel = 1; /* This runs kgdb */
|
trio_info[tty_num].kgdb_channel = 1; /* This runs kgdb */
|
trio_info[tty_num ^ 1].kgdb_channel = 0; /* This does not */
|
trio_info[tty_num ^ 1].kgdb_channel = 0; /* This does not */
|
/* Turn on transmitter/receiver at 8-bits/char */
|
/* Turn on transmitter/receiver at 8-bits/char */
|
kgdb_chaninit(&trio_info[tty_num], 0, 9600);
|
kgdb_chaninit(&trio_info[tty_num], 0, 9600);
|
ZS_CLEARERR(trio_kgdbchan);
|
ZS_CLEARERR(trio_kgdbchan);
|
udelay(5);
|
udelay(5);
|
ZS_CLEARFIFO(trio_kgdbchan);
|
ZS_CLEARFIFO(trio_kgdbchan);
|
}
|
}
|
#endif
|
#endif
|
|
|
