diff options
author | Jiri Slaby <jslaby@suse.cz> | 2012-04-02 13:54:39 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-09 12:02:44 -0700 |
commit | 1bb2687c3bad13a061e98887bdfb1a6b9ad79542 (patch) | |
tree | be58f831907fef67f96804a3b80059eae44c7368 /drivers/tty | |
parent | 107afb7a50726cb8ea9ed74d62311ddc59fef1da (diff) | |
download | op-kernel-dev-1bb2687c3bad13a061e98887bdfb1a6b9ad79542.zip op-kernel-dev-1bb2687c3bad13a061e98887bdfb1a6b9ad79542.tar.gz |
TTY: 68328serial, remove 68328serial.h
All the needed stuff is moved to 68328serial.c now.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r-- | drivers/tty/serial/68328serial.c | 79 | ||||
-rw-r--r-- | drivers/tty/serial/68328serial.h | 94 |
2 files changed, 76 insertions, 97 deletions
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c index f0d5039..116d932 100644 --- a/drivers/tty/serial/68328serial.c +++ b/drivers/tty/serial/68328serial.c @@ -57,8 +57,6 @@ #endif /* CONFIG_M68VZ328 */ #endif /* CONFIG_M68EZ328 */ -#include "68328serial.h" - /* Turn off usage of real serial interrupt code, to "support" Copilot */ #ifdef CONFIG_XCOPILOT_BUGS #undef USE_INTS @@ -66,9 +64,84 @@ #define USE_INTS #endif +/* + * I believe this is the optimal setting that reduces the number of interrupts. + * At high speeds the output might become a little "bursted" (use USTCNT_TXHE + * if that bothers you), but in most cases it will not, since we try to + * transmit characters every time rs_interrupt is called. Thus, quite often + * you'll see that a receive interrupt occures before the transmit one. + * -- Vladimir Gurevich + */ +#define USTCNT_TX_INTR_MASK (USTCNT_TXEE) + +/* + * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special + * "Old data interrupt" which occures whenever the data stay in the FIFO + * longer than 30 bits time. This allows us to use FIFO without compromising + * latency. '328 does not have this feature and without the real 328-based + * board I would assume that RXRE is the safest setting. + * + * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of + * interrupts. RXFE (receive queue full) causes the system to lose data + * at least at 115200 baud + * + * If your board is busy doing other stuff, you might consider to use + * RXRE (data ready intrrupt) instead. + * + * The other option is to make these INTR masks run-time configurable, so + * that people can dynamically adapt them according to the current usage. + * -- Vladimir Gurevich + */ + +/* (es) */ +#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328) +#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN) +#elif defined(CONFIG_M68328) +#define USTCNT_RX_INTR_MASK (USTCNT_RXRE) +#else +#error Please, define the Rx interrupt events for your CPU +#endif +/* (/es) */ + +/* + * This is our internal structure for each serial port's state. + * + * For definitions of the flags field, see serial.h + */ +struct m68k_serial { + char is_cons; /* Is this our console. */ + int magic; + int baud_base; + int port; + int irq; + int flags; /* defined in tty.h */ + int type; /* UART type */ + struct tty_struct *tty; + int custom_divisor; + int x_char; /* xon/xoff character */ + int close_delay; + unsigned short closing_wait; + int line; + int count; /* # of fd on device */ + int blocked_open; /* # of blocked opens */ + unsigned char *xmit_buf; + int xmit_head; + int xmit_tail; + int xmit_cnt; + wait_queue_head_t open_wait; + wait_queue_head_t close_wait; +}; + +#define SERIAL_MAGIC 0x5301 + +/* + * Define the number of ports supported and their irqs. + */ +#define NR_PORTS 1 + static struct m68k_serial m68k_soft[NR_PORTS]; -static unsigned int uart_irqs[NR_PORTS] = UART_IRQ_DEFNS; +static unsigned int uart_irqs[NR_PORTS] = { UART_IRQ_NUM }; /* multiple ports are contiguous in memory */ m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR; diff --git a/drivers/tty/serial/68328serial.h b/drivers/tty/serial/68328serial.h deleted file mode 100644 index 971ead5..0000000 --- a/drivers/tty/serial/68328serial.h +++ /dev/null @@ -1,94 +0,0 @@ -/* 68328serial.h: Definitions for the mc68328 serial driver. - * - * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> - * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> - * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> - * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> - * - * VZ Support/Fixes Evan Stawnyczy <e@lineo.ca> - */ - -#ifndef _MC683XX_SERIAL_H -#define _MC683XX_SERIAL_H - -/* - * I believe this is the optimal setting that reduces the number of interrupts. - * At high speeds the output might become a little "bursted" (use USTCNT_TXHE - * if that bothers you), but in most cases it will not, since we try to - * transmit characters every time rs_interrupt is called. Thus, quite often - * you'll see that a receive interrupt occures before the transmit one. - * -- Vladimir Gurevich - */ -#define USTCNT_TX_INTR_MASK (USTCNT_TXEE) - -/* - * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special - * "Old data interrupt" which occures whenever the data stay in the FIFO - * longer than 30 bits time. This allows us to use FIFO without compromising - * latency. '328 does not have this feature and without the real 328-based - * board I would assume that RXRE is the safest setting. - * - * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of - * interrupts. RXFE (receive queue full) causes the system to lose data - * at least at 115200 baud - * - * If your board is busy doing other stuff, you might consider to use - * RXRE (data ready intrrupt) instead. - * - * The other option is to make these INTR masks run-time configurable, so - * that people can dynamically adapt them according to the current usage. - * -- Vladimir Gurevich - */ - -/* (es) */ -#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328) -#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN) -#elif defined(CONFIG_M68328) -#define USTCNT_RX_INTR_MASK (USTCNT_RXRE) -#else -#error Please, define the Rx interrupt events for your CPU -#endif -/* (/es) */ - -/* - * This is our internal structure for each serial port's state. - * - * Many fields are paralleled by the structure used by the serial_struct - * structure. - * - * For definitions of the flags field, see tty.h - */ - -struct m68k_serial { - char is_cons; /* Is this our console. */ - int magic; - int baud_base; - int port; - int irq; - int flags; /* defined in tty.h */ - int type; /* UART type */ - struct tty_struct *tty; - int custom_divisor; - int x_char; /* xon/xoff character */ - int close_delay; - unsigned short closing_wait; - int line; - int count; /* # of fd on device */ - int blocked_open; /* # of blocked opens */ - unsigned char *xmit_buf; - int xmit_head; - int xmit_tail; - int xmit_cnt; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; -}; - -#define SERIAL_MAGIC 0x5301 - -/* - * Define the number of ports supported and their irqs. - */ -#define NR_PORTS 1 -#define UART_IRQ_DEFNS {UART_IRQ_NUM} - -#endif /* !(_MC683XX_SERIAL_H) */ |