1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
462 lines
14 KiB
C
462 lines
14 KiB
C
/*
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* macserial.h: Definitions for the Macintosh Z8530 serial driver.
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*
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* Adapted from drivers/sbus/char/sunserial.h by Paul Mackerras.
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*
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* Copyright (C) 1996 Paul Mackerras (Paul.Mackerras@cs.anu.edu.au)
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _MACSERIAL_H
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#define _MACSERIAL_H
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#include <linux/spinlock.h>
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#define NUM_ZSREGS 16
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struct serial_struct {
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int type;
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int line;
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int port;
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int irq;
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int flags;
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int xmit_fifo_size;
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int custom_divisor;
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int baud_base;
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unsigned short close_delay;
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char reserved_char[2];
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int hub6;
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unsigned short closing_wait; /* time to wait before closing */
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unsigned short closing_wait2; /* no longer used... */
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int reserved[4];
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};
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/*
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* For the close wait times, 0 means wait forever for serial port to
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* flush its output. 65535 means don't wait at all.
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*/
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#define ZILOG_CLOSING_WAIT_INF 0
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#define ZILOG_CLOSING_WAIT_NONE 65535
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/*
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* Definitions for ZILOG_struct (and serial_struct) flags field
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*/
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#define ZILOG_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
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* on the callout port */
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#define ZILOG_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
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#define ZILOG_SAK 0x0004 /* Secure Attention Key (Orange book) */
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#define ZILOG_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
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#define ZILOG_SPD_MASK 0x0030
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#define ZILOG_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
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#define ZILOG_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
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#define ZILOG_SPD_CUST 0x0030 /* Use user-specified divisor */
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#define ZILOG_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
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#define ZILOG_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
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#define ZILOG_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
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#define ZILOG_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
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#define ZILOG_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
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#define ZILOG_FLAGS 0x0FFF /* Possible legal ZILOG flags */
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#define ZILOG_USR_MASK 0x0430 /* Legal flags that non-privileged
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* users can set or reset */
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/* Internal flags used only by kernel/chr_drv/serial.c */
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#define ZILOG_INITIALIZED 0x80000000 /* Serial port was initialized */
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#define ZILOG_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */
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#define ZILOG_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
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#define ZILOG_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
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#define ZILOG_CLOSING 0x08000000 /* Serial port is closing */
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#define ZILOG_CTS_FLOW 0x04000000 /* Do CTS flow control */
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#define ZILOG_CHECK_CD 0x02000000 /* i.e., CLOCAL */
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#define ZILOG_SLEEPING 0x01000000 /* have shut it down for sleep */
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/* Software state per channel */
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#ifdef __KERNEL__
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/*
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* This is our internal structure for each serial port's state.
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*
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* Many fields are paralleled by the structure used by the serial_struct
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* structure.
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*
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* For definitions of the flags field, see tty.h
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*/
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struct mac_serial;
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struct mac_zschannel {
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volatile unsigned char* control;
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volatile unsigned char* data;
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spinlock_t lock;
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/* Used for debugging */
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struct mac_serial* parent;
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};
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struct mac_dma {
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volatile struct dbdma_regs dma;
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volatile unsigned short res_count;
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volatile unsigned short command;
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volatile unsigned int buf_addr;
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};
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struct mac_serial {
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struct mac_serial *zs_next; /* For IRQ servicing chain */
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struct mac_zschannel *zs_channel; /* Channel registers */
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struct mac_zschannel *zs_chan_a; /* A side registers */
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unsigned char read_reg_zero;
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struct device_node* dev_node;
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spinlock_t lock;
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char soft_carrier; /* Use soft carrier on this channel */
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char break_abort; /* Is serial console in, so process brk/abrt */
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char kgdb_channel; /* Kgdb is running on this channel */
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char is_cons; /* Is this our console. */
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char is_internal_modem; /* is connected to an internal modem */
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char is_irda; /* is connected to an IrDA codec */
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int port_type; /* Port type for pmac_feature */
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unsigned char tx_active; /* character is being xmitted */
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unsigned char tx_stopped; /* output is suspended */
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unsigned char power_wait; /* waiting for power-up delay to expire */
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/* We need to know the current clock divisor
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* to read the bps rate the chip has currently
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* loaded.
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*/
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unsigned char clk_divisor; /* May be 1, 16, 32, or 64 */
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int zs_baud;
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/* Current write register values */
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unsigned char curregs[NUM_ZSREGS];
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/* Values we need to set next opportunity */
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unsigned char pendregs[NUM_ZSREGS];
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char change_needed;
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int magic;
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int baud_base;
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int port;
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int irq;
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int flags; /* defined in tty.h */
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int type; /* UART type */
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struct tty_struct *tty;
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int read_status_mask;
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int ignore_status_mask;
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int timeout;
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int xmit_fifo_size;
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int custom_divisor;
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int x_char; /* xon/xoff character */
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int close_delay;
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unsigned short closing_wait;
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unsigned short closing_wait2;
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unsigned long event;
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unsigned long last_active;
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int line;
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int count; /* # of fd on device */
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int blocked_open; /* # of blocked opens */
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unsigned char *xmit_buf;
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int xmit_head;
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int xmit_tail;
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int xmit_cnt;
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struct work_struct tqueue;
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wait_queue_head_t open_wait;
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wait_queue_head_t close_wait;
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volatile struct dbdma_regs *tx_dma;
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int tx_dma_irq;
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volatile struct dbdma_cmd *tx_cmds;
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volatile struct mac_dma *rx;
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int rx_dma_irq;
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volatile struct dbdma_cmd **rx_cmds;
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unsigned char **rx_char_buf;
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unsigned char **rx_flag_buf;
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#define RX_BUF_SIZE 256
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int rx_nbuf;
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int rx_done_bytes;
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int rx_ubuf;
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int rx_fbuf;
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#define RX_NO_FBUF (-1)
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int rx_cbuf;
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spinlock_t rx_dma_lock;
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int has_dma;
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int dma_initted;
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void *dma_priv;
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struct timer_list poll_dma_timer;
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#define RX_DMA_TIMER (jiffies + 10*HZ/1000)
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struct timer_list powerup_timer;
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};
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#define SERIAL_MAGIC 0x5301
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/*
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* The size of the serial xmit buffer is 1 page, or 4096 bytes
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*/
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#define SERIAL_XMIT_SIZE 4096
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/*
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* Events are used to schedule things to happen at timer-interrupt
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* time, instead of at rs interrupt time.
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*/
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#define RS_EVENT_WRITE_WAKEUP 0
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#endif /* __KERNEL__ */
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/* Conversion routines to/from brg time constants from/to bits
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* per second.
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*/
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#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2))
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#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2)
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/* The Zilog register set */
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#define FLAG 0x7e
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/* Write Register 0 */
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#define R0 0 /* Register selects */
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#define R1 1
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#define R2 2
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#define R3 3
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#define R4 4
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#define R5 5
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#define R6 6
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#define R7 7
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#define R8 8
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#define R9 9
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#define R10 10
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#define R11 11
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#define R12 12
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#define R13 13
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#define R14 14
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#define R15 15
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#define NULLCODE 0 /* Null Code */
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#define POINT_HIGH 0x8 /* Select upper half of registers */
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#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */
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#define SEND_ABORT 0x18 /* HDLC Abort */
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#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */
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#define RES_Tx_P 0x28 /* Reset TxINT Pending */
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#define ERR_RES 0x30 /* Error Reset */
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#define RES_H_IUS 0x38 /* Reset highest IUS */
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#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */
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#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */
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#define RES_EOM_L 0xC0 /* Reset EOM latch */
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/* Write Register 1 */
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#define EXT_INT_ENAB 0x1 /* Ext Int Enable */
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#define TxINT_ENAB 0x2 /* Tx Int Enable */
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#define PAR_SPEC 0x4 /* Parity is special condition */
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#define RxINT_DISAB 0 /* Rx Int Disable */
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#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */
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#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */
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#define INT_ERR_Rx 0x18 /* Int on error only */
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#define WT_RDY_RT 0x20 /* W/Req reflects recv if 1, xmit if 0 */
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#define WT_FN_RDYFN 0x40 /* W/Req pin is DMA request if 1, wait if 0 */
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#define WT_RDY_ENAB 0x80 /* Enable W/Req pin */
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/* Write Register #2 (Interrupt Vector) */
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/* Write Register 3 */
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#define RxENABLE 0x1 /* Rx Enable */
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#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */
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#define ADD_SM 0x4 /* Address Search Mode (SDLC) */
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#define RxCRC_ENAB 0x8 /* Rx CRC Enable */
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#define ENT_HM 0x10 /* Enter Hunt Mode */
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#define AUTO_ENAB 0x20 /* Auto Enables */
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#define Rx5 0x0 /* Rx 5 Bits/Character */
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#define Rx7 0x40 /* Rx 7 Bits/Character */
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#define Rx6 0x80 /* Rx 6 Bits/Character */
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#define Rx8 0xc0 /* Rx 8 Bits/Character */
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#define RxNBITS_MASK 0xc0
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/* Write Register 4 */
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#define PAR_ENA 0x1 /* Parity Enable */
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#define PAR_EVEN 0x2 /* Parity Even/Odd* */
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#define SYNC_ENAB 0 /* Sync Modes Enable */
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#define SB1 0x4 /* 1 stop bit/char */
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#define SB15 0x8 /* 1.5 stop bits/char */
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#define SB2 0xc /* 2 stop bits/char */
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#define SB_MASK 0xc
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#define MONSYNC 0 /* 8 Bit Sync character */
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#define BISYNC 0x10 /* 16 bit sync character */
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#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */
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#define EXTSYNC 0x30 /* External Sync Mode */
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#define X1CLK 0x0 /* x1 clock mode */
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#define X16CLK 0x40 /* x16 clock mode */
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#define X32CLK 0x80 /* x32 clock mode */
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#define X64CLK 0xC0 /* x64 clock mode */
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#define XCLK_MASK 0xC0
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/* Write Register 5 */
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#define TxCRC_ENAB 0x1 /* Tx CRC Enable */
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#define RTS 0x2 /* RTS */
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#define SDLC_CRC 0x4 /* SDLC/CRC-16 */
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#define TxENAB 0x8 /* Tx Enable */
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#define SND_BRK 0x10 /* Send Break */
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#define Tx5 0x0 /* Tx 5 bits (or less)/character */
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#define Tx7 0x20 /* Tx 7 bits/character */
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#define Tx6 0x40 /* Tx 6 bits/character */
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#define Tx8 0x60 /* Tx 8 bits/character */
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#define TxNBITS_MASK 0x60
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#define DTR 0x80 /* DTR */
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/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */
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/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */
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/* Write Register 7' (Some enhanced feature control) */
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#define ENEXREAD 0x40 /* Enable read of some write registers */
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/* Write Register 8 (transmit buffer) */
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/* Write Register 9 (Master interrupt control) */
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#define VIS 1 /* Vector Includes Status */
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#define NV 2 /* No Vector */
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#define DLC 4 /* Disable Lower Chain */
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#define MIE 8 /* Master Interrupt Enable */
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#define STATHI 0x10 /* Status high */
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#define NORESET 0 /* No reset on write to R9 */
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#define CHRB 0x40 /* Reset channel B */
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#define CHRA 0x80 /* Reset channel A */
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#define FHWRES 0xc0 /* Force hardware reset */
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/* Write Register 10 (misc control bits) */
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#define BIT6 1 /* 6 bit/8bit sync */
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#define LOOPMODE 2 /* SDLC Loop mode */
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#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */
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#define MARKIDLE 8 /* Mark/flag on idle */
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#define GAOP 0x10 /* Go active on poll */
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#define NRZ 0 /* NRZ mode */
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#define NRZI 0x20 /* NRZI mode */
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#define FM1 0x40 /* FM1 (transition = 1) */
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#define FM0 0x60 /* FM0 (transition = 0) */
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#define CRCPS 0x80 /* CRC Preset I/O */
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/* Write Register 11 (Clock Mode control) */
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#define TRxCXT 0 /* TRxC = Xtal output */
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#define TRxCTC 1 /* TRxC = Transmit clock */
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#define TRxCBR 2 /* TRxC = BR Generator Output */
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#define TRxCDP 3 /* TRxC = DPLL output */
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#define TRxCOI 4 /* TRxC O/I */
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#define TCRTxCP 0 /* Transmit clock = RTxC pin */
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#define TCTRxCP 8 /* Transmit clock = TRxC pin */
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#define TCBR 0x10 /* Transmit clock = BR Generator output */
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#define TCDPLL 0x18 /* Transmit clock = DPLL output */
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#define RCRTxCP 0 /* Receive clock = RTxC pin */
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#define RCTRxCP 0x20 /* Receive clock = TRxC pin */
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#define RCBR 0x40 /* Receive clock = BR Generator output */
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#define RCDPLL 0x60 /* Receive clock = DPLL output */
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#define RTxCX 0x80 /* RTxC Xtal/No Xtal */
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/* Write Register 12 (lower byte of baud rate generator time constant) */
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/* Write Register 13 (upper byte of baud rate generator time constant) */
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/* Write Register 14 (Misc control bits) */
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#define BRENABL 1 /* Baud rate generator enable */
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#define BRSRC 2 /* Baud rate generator source */
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#define DTRREQ 4 /* DTR/Request function */
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#define AUTOECHO 8 /* Auto Echo */
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#define LOOPBAK 0x10 /* Local loopback */
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#define SEARCH 0x20 /* Enter search mode */
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#define RMC 0x40 /* Reset missing clock */
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#define DISDPLL 0x60 /* Disable DPLL */
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#define SSBR 0x80 /* Set DPLL source = BR generator */
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#define SSRTxC 0xa0 /* Set DPLL source = RTxC */
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#define SFMM 0xc0 /* Set FM mode */
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#define SNRZI 0xe0 /* Set NRZI mode */
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/* Write Register 15 (external/status interrupt control) */
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#define EN85C30 1 /* Enable some 85c30-enhanced registers */
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#define ZCIE 2 /* Zero count IE */
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#define ENSTFIFO 4 /* Enable status FIFO (SDLC) */
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#define DCDIE 8 /* DCD IE */
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#define SYNCIE 0x10 /* Sync/hunt IE */
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#define CTSIE 0x20 /* CTS IE */
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#define TxUIE 0x40 /* Tx Underrun/EOM IE */
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#define BRKIE 0x80 /* Break/Abort IE */
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/* Read Register 0 */
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#define Rx_CH_AV 0x1 /* Rx Character Available */
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#define ZCOUNT 0x2 /* Zero count */
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#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */
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#define DCD 0x8 /* DCD */
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#define SYNC_HUNT 0x10 /* Sync/hunt */
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#define CTS 0x20 /* CTS */
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#define TxEOM 0x40 /* Tx underrun */
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#define BRK_ABRT 0x80 /* Break/Abort */
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/* Read Register 1 */
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#define ALL_SNT 0x1 /* All sent */
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/* Residue Data for 8 Rx bits/char programmed */
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#define RES3 0x8 /* 0/3 */
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#define RES4 0x4 /* 0/4 */
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#define RES5 0xc /* 0/5 */
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#define RES6 0x2 /* 0/6 */
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#define RES7 0xa /* 0/7 */
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#define RES8 0x6 /* 0/8 */
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#define RES18 0xe /* 1/8 */
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#define RES28 0x0 /* 2/8 */
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/* Special Rx Condition Interrupts */
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#define PAR_ERR 0x10 /* Parity error */
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#define Rx_OVR 0x20 /* Rx Overrun Error */
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#define FRM_ERR 0x40 /* CRC/Framing Error */
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#define END_FR 0x80 /* End of Frame (SDLC) */
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/* Read Register 2 (channel b only) - Interrupt vector */
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#define CHB_Tx_EMPTY 0x00
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#define CHB_EXT_STAT 0x02
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#define CHB_Rx_AVAIL 0x04
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#define CHB_SPECIAL 0x06
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#define CHA_Tx_EMPTY 0x08
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#define CHA_EXT_STAT 0x0a
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#define CHA_Rx_AVAIL 0x0c
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#define CHA_SPECIAL 0x0e
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#define STATUS_MASK 0x06
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/* Read Register 3 (interrupt pending register) ch a only */
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#define CHBEXT 0x1 /* Channel B Ext/Stat IP */
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#define CHBTxIP 0x2 /* Channel B Tx IP */
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#define CHBRxIP 0x4 /* Channel B Rx IP */
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#define CHAEXT 0x8 /* Channel A Ext/Stat IP */
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#define CHATxIP 0x10 /* Channel A Tx IP */
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#define CHARxIP 0x20 /* Channel A Rx IP */
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/* Read Register 8 (receive data register) */
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/* Read Register 10 (misc status bits) */
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#define ONLOOP 2 /* On loop */
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#define LOOPSEND 0x10 /* Loop sending */
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#define CLK2MIS 0x40 /* Two clocks missing */
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#define CLK1MIS 0x80 /* One clock missing */
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/* Read Register 12 (lower byte of baud rate generator constant) */
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/* Read Register 13 (upper byte of baud rate generator constant) */
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/* Read Register 15 (value of WR 15) */
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/* Misc macros */
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#define ZS_CLEARERR(channel) (write_zsreg(channel, 0, ERR_RES))
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#define ZS_CLEARFIFO(channel) do { volatile unsigned char garbage; \
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garbage = read_zsdata(channel); \
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garbage = read_zsdata(channel); \
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garbage = read_zsdata(channel); \
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} while(0)
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#endif /* !(_MACSERIAL_H) */
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