| /* 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 |
| |
| |
| struct serial_struct { |
| int type; |
| int line; |
| int port; |
| int irq; |
| int flags; |
| int xmit_fifo_size; |
| int custom_divisor; |
| int baud_base; |
| unsigned short close_delay; |
| char reserved_char[2]; |
| int hub6; /* FIXME: We don't have AT&T Hub6 boards! */ |
| unsigned short closing_wait; /* time to wait before closing */ |
| unsigned short closing_wait2; /* no longer used... */ |
| int reserved[4]; |
| }; |
| |
| /* |
| * For the close wait times, 0 means wait forever for serial port to |
| * flush its output. 65535 means don't wait at all. |
| */ |
| #define S_CLOSING_WAIT_INF 0 |
| #define S_CLOSING_WAIT_NONE 65535 |
| |
| /* |
| * Definitions for S_struct (and serial_struct) flags field |
| */ |
| #define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes |
| on the callout port */ |
| #define S_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ |
| #define S_SAK 0x0004 /* Secure Attention Key (Orange book) */ |
| #define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ |
| |
| #define S_SPD_MASK 0x0030 |
| #define S_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ |
| |
| #define S_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ |
| #define S_SPD_CUST 0x0030 /* Use user-specified divisor */ |
| |
| #define S_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ |
| #define S_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ |
| #define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ |
| #define S_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ |
| #define S_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ |
| |
| #define S_FLAGS 0x0FFF /* Possible legal S flags */ |
| #define S_USR_MASK 0x0430 /* Legal flags that non-privileged |
| * users can set or reset */ |
| |
| /* Internal flags used only by kernel/chr_drv/serial.c */ |
| #define S_INITIALIZED 0x80000000 /* Serial port was initialized */ |
| #define S_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */ |
| #define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ |
| #define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ |
| #define S_CLOSING 0x08000000 /* Serial port is closing */ |
| #define S_CTS_FLOW 0x04000000 /* Do CTS flow control */ |
| #define S_CHECK_CD 0x02000000 /* i.e., CLOCAL */ |
| |
| /* Software state per channel */ |
| |
| #ifdef __KERNEL__ |
| |
| /* |
| * 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 soft_carrier; /* Use soft carrier on this channel */ |
| char break_abort; /* Is serial console in, so process brk/abrt */ |
| char is_cons; /* Is this our console. */ |
| |
| /* We need to know the current clock divisor |
| * to read the bps rate the chip has currently |
| * loaded. |
| */ |
| unsigned char clk_divisor; /* May be 1, 16, 32, or 64 */ |
| int baud; |
| int magic; |
| int baud_base; |
| int port; |
| int irq; |
| int flags; /* defined in tty.h */ |
| int type; /* UART type */ |
| struct tty_struct *tty; |
| int read_status_mask; |
| int ignore_status_mask; |
| int timeout; |
| int xmit_fifo_size; |
| int custom_divisor; |
| int x_char; /* xon/xoff character */ |
| int close_delay; |
| unsigned short closing_wait; |
| unsigned short closing_wait2; |
| unsigned long event; |
| unsigned long last_active; |
| 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; |
| struct work_struct tqueue; |
| struct work_struct tqueue_hangup; |
| wait_queue_head_t open_wait; |
| wait_queue_head_t close_wait; |
| }; |
| |
| |
| #define SERIAL_MAGIC 0x5301 |
| |
| /* |
| * The size of the serial xmit buffer is 1 page, or 4096 bytes |
| */ |
| #define SERIAL_XMIT_SIZE 4096 |
| |
| /* |
| * Events are used to schedule things to happen at timer-interrupt |
| * time, instead of at rs interrupt time. |
| */ |
| #define RS_EVENT_WRITE_WAKEUP 0 |
| |
| /* |
| * Define the number of ports supported and their irqs. |
| */ |
| #ifndef CONFIG_68328_SERIAL_UART2 |
| #define NR_PORTS 1 |
| #define UART_IRQ_DEFNS {UART_IRQ_NUM} |
| #else |
| #define NR_PORTS 2 |
| #define UART_IRQ_DEFNS {UART1_IRQ_NUM, UART2_IRQ_NUM} |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| #endif /* !(_MC683XX_SERIAL_H) */ |
