--- /dev/null
+/* 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.
+ */
+#define NR_PORTS 1
+#define UART_IRQ_DEFNS {UART_IRQ_NUM}
+
+#endif /* __KERNEL__ */
+#endif /* !(_MC683XX_SERIAL_H) */
projects / mv-sheeva.git / blobdiff