![Jiri Slaby](/assets/img/avatar_default.png)
This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty In this case ->install is the only thing we want to do. We do not need ->open at all. See the tty->count > 1 check. And since we take a reference in ->install, we need also ->cleanup to drop the reference to a view. Final note, see that we leave raw3270_find_view in place. It is because views are removed even from module_exit. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1825 lines
42 KiB
C
1825 lines
42 KiB
C
/*
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* IBM/3270 Driver - tty functions.
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*
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* Author(s):
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* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
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* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
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* -- Copyright IBM Corp. 2003
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kdev_t.h>
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#include <linux/tty.h>
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#include <linux/vt_kern.h>
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/bootmem.h>
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#include <linux/compat.h>
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#include <asm/ccwdev.h>
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#include <asm/cio.h>
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#include <asm/ebcdic.h>
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#include <asm/uaccess.h>
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#include "raw3270.h"
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#include "tty3270.h"
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#include "keyboard.h"
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#define TTY3270_CHAR_BUF_SIZE 256
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#define TTY3270_OUTPUT_BUFFER_SIZE 1024
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#define TTY3270_STRING_PAGES 5
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struct tty_driver *tty3270_driver;
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static int tty3270_max_index;
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static struct raw3270_fn tty3270_fn;
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struct tty3270_cell {
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unsigned char character;
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unsigned char highlight;
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unsigned char f_color;
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};
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struct tty3270_line {
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struct tty3270_cell *cells;
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int len;
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};
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#define ESCAPE_NPAR 8
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/*
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* The main tty view data structure.
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* FIXME:
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* 1) describe line orientation & lines list concept against screen
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* 2) describe conversion of screen to lines
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* 3) describe line format.
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*/
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struct tty3270 {
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struct raw3270_view view;
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struct tty_port port;
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void **freemem_pages; /* Array of pages used for freemem. */
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struct list_head freemem; /* List of free memory for strings. */
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/* Output stuff. */
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struct list_head lines; /* List of lines. */
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struct list_head update; /* List of lines to update. */
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unsigned char wcc; /* Write control character. */
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int nr_lines; /* # lines in list. */
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int nr_up; /* # lines up in history. */
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unsigned long update_flags; /* Update indication bits. */
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struct string *status; /* Lower right of display. */
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struct raw3270_request *write; /* Single write request. */
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struct timer_list timer; /* Output delay timer. */
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/* Current tty screen. */
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unsigned int cx, cy; /* Current output position. */
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unsigned int highlight; /* Blink/reverse/underscore */
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unsigned int f_color; /* Foreground color */
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struct tty3270_line *screen;
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/* Input stuff. */
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struct string *prompt; /* Output string for input area. */
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struct string *input; /* Input string for read request. */
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struct raw3270_request *read; /* Single read request. */
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struct raw3270_request *kreset; /* Single keyboard reset request. */
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unsigned char inattr; /* Visible/invisible input. */
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int throttle, attn; /* tty throttle/unthrottle. */
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struct tasklet_struct readlet; /* Tasklet to issue read request. */
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struct kbd_data *kbd; /* key_maps stuff. */
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/* Escape sequence parsing. */
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int esc_state, esc_ques, esc_npar;
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int esc_par[ESCAPE_NPAR];
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unsigned int saved_cx, saved_cy;
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unsigned int saved_highlight, saved_f_color;
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/* Command recalling. */
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struct list_head rcl_lines; /* List of recallable lines. */
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struct list_head *rcl_walk; /* Point in rcl_lines list. */
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int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */
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/* Character array for put_char/flush_chars. */
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unsigned int char_count;
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char char_buf[TTY3270_CHAR_BUF_SIZE];
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};
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/* tty3270->update_flags. See tty3270_update for details. */
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#define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
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#define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
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#define TTY_UPDATE_INPUT 4 /* Update input line. */
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#define TTY_UPDATE_STATUS 8 /* Update status line. */
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#define TTY_UPDATE_ALL 16 /* Recreate screen. */
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static void tty3270_update(struct tty3270 *);
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/*
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* Setup timeout for a device. On timeout trigger an update.
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*/
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static void tty3270_set_timer(struct tty3270 *tp, int expires)
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{
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if (expires == 0)
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del_timer(&tp->timer);
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else
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mod_timer(&tp->timer, jiffies + expires);
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}
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/*
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* The input line are the two last lines of the screen.
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*/
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static void
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tty3270_update_prompt(struct tty3270 *tp, char *input, int count)
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{
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struct string *line;
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unsigned int off;
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line = tp->prompt;
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if (count != 0)
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line->string[5] = TF_INMDT;
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else
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line->string[5] = tp->inattr;
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if (count > tp->view.cols * 2 - 11)
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count = tp->view.cols * 2 - 11;
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memcpy(line->string + 6, input, count);
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line->string[6 + count] = TO_IC;
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/* Clear to end of input line. */
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if (count < tp->view.cols * 2 - 11) {
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line->string[7 + count] = TO_RA;
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line->string[10 + count] = 0;
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off = tp->view.cols * tp->view.rows - 9;
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raw3270_buffer_address(tp->view.dev, line->string+count+8, off);
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line->len = 11 + count;
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} else
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line->len = 7 + count;
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tp->update_flags |= TTY_UPDATE_INPUT;
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}
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static void
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tty3270_create_prompt(struct tty3270 *tp)
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{
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static const unsigned char blueprint[] =
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{ TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT,
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/* empty input string */
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TO_IC, TO_RA, 0, 0, 0 };
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struct string *line;
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unsigned int offset;
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line = alloc_string(&tp->freemem,
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sizeof(blueprint) + tp->view.cols * 2 - 9);
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tp->prompt = line;
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tp->inattr = TF_INPUT;
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/* Copy blueprint to status line */
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memcpy(line->string, blueprint, sizeof(blueprint));
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line->len = sizeof(blueprint);
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/* Set output offsets. */
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offset = tp->view.cols * (tp->view.rows - 2);
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raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
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offset = tp->view.cols * tp->view.rows - 9;
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raw3270_buffer_address(tp->view.dev, line->string + 8, offset);
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/* Allocate input string for reading. */
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tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6);
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}
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/*
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* The status line is the last line of the screen. It shows the string
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* "Running"/"Holding" in the lower right corner of the screen.
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*/
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static void
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tty3270_update_status(struct tty3270 * tp)
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{
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char *str;
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str = (tp->nr_up != 0) ? "History" : "Running";
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memcpy(tp->status->string + 8, str, 7);
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codepage_convert(tp->view.ascebc, tp->status->string + 8, 7);
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tp->update_flags |= TTY_UPDATE_STATUS;
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}
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static void
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tty3270_create_status(struct tty3270 * tp)
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{
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static const unsigned char blueprint[] =
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{ TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN,
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0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR,
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TAC_RESET };
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struct string *line;
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unsigned int offset;
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line = alloc_string(&tp->freemem,sizeof(blueprint));
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tp->status = line;
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/* Copy blueprint to status line */
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memcpy(line->string, blueprint, sizeof(blueprint));
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/* Set address to start of status string (= last 9 characters). */
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offset = tp->view.cols * tp->view.rows - 9;
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raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
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}
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/*
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* Set output offsets to 3270 datastream fragment of a tty string.
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* (TO_SBA offset at the start and TO_RA offset at the end of the string)
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*/
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static void
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tty3270_update_string(struct tty3270 *tp, struct string *line, int nr)
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{
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unsigned char *cp;
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raw3270_buffer_address(tp->view.dev, line->string + 1,
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tp->view.cols * nr);
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cp = line->string + line->len - 4;
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if (*cp == TO_RA)
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raw3270_buffer_address(tp->view.dev, cp + 1,
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tp->view.cols * (nr + 1));
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}
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/*
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* Rebuild update list to print all lines.
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*/
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static void
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tty3270_rebuild_update(struct tty3270 *tp)
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{
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struct string *s, *n;
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int line, nr_up;
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/*
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* Throw away update list and create a new one,
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* containing all lines that will fit on the screen.
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*/
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list_for_each_entry_safe(s, n, &tp->update, update)
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list_del_init(&s->update);
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line = tp->view.rows - 3;
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nr_up = tp->nr_up;
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list_for_each_entry_reverse(s, &tp->lines, list) {
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if (nr_up > 0) {
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nr_up--;
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continue;
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}
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tty3270_update_string(tp, s, line);
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list_add(&s->update, &tp->update);
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if (--line < 0)
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break;
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}
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tp->update_flags |= TTY_UPDATE_LIST;
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}
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/*
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* Alloc string for size bytes. If there is not enough room in
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* freemem, free strings until there is room.
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*/
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static struct string *
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tty3270_alloc_string(struct tty3270 *tp, size_t size)
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{
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struct string *s, *n;
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s = alloc_string(&tp->freemem, size);
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if (s)
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return s;
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list_for_each_entry_safe(s, n, &tp->lines, list) {
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BUG_ON(tp->nr_lines <= tp->view.rows - 2);
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list_del(&s->list);
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if (!list_empty(&s->update))
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list_del(&s->update);
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tp->nr_lines--;
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if (free_string(&tp->freemem, s) >= size)
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break;
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}
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s = alloc_string(&tp->freemem, size);
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BUG_ON(!s);
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if (tp->nr_up != 0 &&
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tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) {
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tp->nr_up = tp->nr_lines - tp->view.rows + 2;
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tty3270_rebuild_update(tp);
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tty3270_update_status(tp);
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}
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return s;
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}
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/*
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* Add an empty line to the list.
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*/
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static void
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tty3270_blank_line(struct tty3270 *tp)
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{
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static const unsigned char blueprint[] =
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{ TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET,
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TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 };
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struct string *s;
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s = tty3270_alloc_string(tp, sizeof(blueprint));
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memcpy(s->string, blueprint, sizeof(blueprint));
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s->len = sizeof(blueprint);
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list_add_tail(&s->list, &tp->lines);
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tp->nr_lines++;
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if (tp->nr_up != 0)
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tp->nr_up++;
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}
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/*
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* Write request completion callback.
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*/
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static void
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tty3270_write_callback(struct raw3270_request *rq, void *data)
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{
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struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
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if (rq->rc != 0) {
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/* Write wasn't successful. Refresh all. */
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tp->update_flags = TTY_UPDATE_ALL;
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tty3270_set_timer(tp, 1);
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}
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raw3270_request_reset(rq);
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xchg(&tp->write, rq);
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}
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/*
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* Update 3270 display.
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*/
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static void
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tty3270_update(struct tty3270 *tp)
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{
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static char invalid_sba[2] = { 0xff, 0xff };
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struct raw3270_request *wrq;
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unsigned long updated;
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struct string *s, *n;
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char *sba, *str;
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int rc, len;
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wrq = xchg(&tp->write, 0);
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if (!wrq) {
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tty3270_set_timer(tp, 1);
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return;
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}
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spin_lock(&tp->view.lock);
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updated = 0;
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if (tp->update_flags & TTY_UPDATE_ALL) {
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tty3270_rebuild_update(tp);
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tty3270_update_status(tp);
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tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST |
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TTY_UPDATE_INPUT | TTY_UPDATE_STATUS;
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}
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if (tp->update_flags & TTY_UPDATE_ERASE) {
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/* Use erase write alternate to erase display. */
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raw3270_request_set_cmd(wrq, TC_EWRITEA);
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updated |= TTY_UPDATE_ERASE;
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} else
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raw3270_request_set_cmd(wrq, TC_WRITE);
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raw3270_request_add_data(wrq, &tp->wcc, 1);
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tp->wcc = TW_NONE;
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/*
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* Update status line.
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*/
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if (tp->update_flags & TTY_UPDATE_STATUS)
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if (raw3270_request_add_data(wrq, tp->status->string,
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tp->status->len) == 0)
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updated |= TTY_UPDATE_STATUS;
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/*
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* Write input line.
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*/
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if (tp->update_flags & TTY_UPDATE_INPUT)
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if (raw3270_request_add_data(wrq, tp->prompt->string,
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tp->prompt->len) == 0)
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updated |= TTY_UPDATE_INPUT;
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sba = invalid_sba;
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if (tp->update_flags & TTY_UPDATE_LIST) {
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/* Write strings in the update list to the screen. */
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list_for_each_entry_safe(s, n, &tp->update, update) {
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str = s->string;
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len = s->len;
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/*
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* Skip TO_SBA at the start of the string if the
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* last output position matches the start address
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* of this line.
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*/
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if (s->string[1] == sba[0] && s->string[2] == sba[1])
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str += 3, len -= 3;
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if (raw3270_request_add_data(wrq, str, len) != 0)
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break;
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list_del_init(&s->update);
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sba = s->string + s->len - 3;
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}
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if (list_empty(&tp->update))
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updated |= TTY_UPDATE_LIST;
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}
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wrq->callback = tty3270_write_callback;
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rc = raw3270_start(&tp->view, wrq);
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if (rc == 0) {
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tp->update_flags &= ~updated;
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if (tp->update_flags)
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tty3270_set_timer(tp, 1);
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} else {
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raw3270_request_reset(wrq);
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xchg(&tp->write, wrq);
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}
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spin_unlock(&tp->view.lock);
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}
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/*
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* Command recalling.
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*/
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static void
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tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
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{
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struct string *s;
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tp->rcl_walk = NULL;
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if (len <= 0)
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return;
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if (tp->rcl_nr >= tp->rcl_max) {
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s = list_entry(tp->rcl_lines.next, struct string, list);
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list_del(&s->list);
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free_string(&tp->freemem, s);
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tp->rcl_nr--;
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}
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s = tty3270_alloc_string(tp, len);
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memcpy(s->string, input, len);
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list_add_tail(&s->list, &tp->rcl_lines);
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tp->rcl_nr++;
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}
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static void
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tty3270_rcl_backward(struct kbd_data *kbd)
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{
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struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
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struct string *s;
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spin_lock_bh(&tp->view.lock);
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if (tp->inattr == TF_INPUT) {
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if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
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tp->rcl_walk = tp->rcl_walk->prev;
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else if (!list_empty(&tp->rcl_lines))
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tp->rcl_walk = tp->rcl_lines.prev;
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s = tp->rcl_walk ?
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list_entry(tp->rcl_walk, struct string, list) : NULL;
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if (tp->rcl_walk) {
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s = list_entry(tp->rcl_walk, struct string, list);
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tty3270_update_prompt(tp, s->string, s->len);
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} else
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tty3270_update_prompt(tp, NULL, 0);
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tty3270_set_timer(tp, 1);
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}
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spin_unlock_bh(&tp->view.lock);
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}
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/*
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* Deactivate tty view.
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*/
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static void
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tty3270_exit_tty(struct kbd_data *kbd)
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{
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struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
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|
|
raw3270_deactivate_view(&tp->view);
|
|
}
|
|
|
|
/*
|
|
* Scroll forward in history.
|
|
*/
|
|
static void
|
|
tty3270_scroll_forward(struct kbd_data *kbd)
|
|
{
|
|
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
|
|
int nr_up;
|
|
|
|
spin_lock_bh(&tp->view.lock);
|
|
nr_up = tp->nr_up - tp->view.rows + 2;
|
|
if (nr_up < 0)
|
|
nr_up = 0;
|
|
if (nr_up != tp->nr_up) {
|
|
tp->nr_up = nr_up;
|
|
tty3270_rebuild_update(tp);
|
|
tty3270_update_status(tp);
|
|
tty3270_set_timer(tp, 1);
|
|
}
|
|
spin_unlock_bh(&tp->view.lock);
|
|
}
|
|
|
|
/*
|
|
* Scroll backward in history.
|
|
*/
|
|
static void
|
|
tty3270_scroll_backward(struct kbd_data *kbd)
|
|
{
|
|
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
|
|
int nr_up;
|
|
|
|
spin_lock_bh(&tp->view.lock);
|
|
nr_up = tp->nr_up + tp->view.rows - 2;
|
|
if (nr_up + tp->view.rows - 2 > tp->nr_lines)
|
|
nr_up = tp->nr_lines - tp->view.rows + 2;
|
|
if (nr_up != tp->nr_up) {
|
|
tp->nr_up = nr_up;
|
|
tty3270_rebuild_update(tp);
|
|
tty3270_update_status(tp);
|
|
tty3270_set_timer(tp, 1);
|
|
}
|
|
spin_unlock_bh(&tp->view.lock);
|
|
}
|
|
|
|
/*
|
|
* Pass input line to tty.
|
|
*/
|
|
static void
|
|
tty3270_read_tasklet(struct raw3270_request *rrq)
|
|
{
|
|
static char kreset_data = TW_KR;
|
|
struct tty3270 *tp = container_of(rrq->view, struct tty3270, view);
|
|
char *input;
|
|
int len;
|
|
|
|
spin_lock_bh(&tp->view.lock);
|
|
/*
|
|
* Two AID keys are special: For 0x7d (enter) the input line
|
|
* has to be emitted to the tty and for 0x6d the screen
|
|
* needs to be redrawn.
|
|
*/
|
|
input = NULL;
|
|
len = 0;
|
|
if (tp->input->string[0] == 0x7d) {
|
|
/* Enter: write input to tty. */
|
|
input = tp->input->string + 6;
|
|
len = tp->input->len - 6 - rrq->rescnt;
|
|
if (tp->inattr != TF_INPUTN)
|
|
tty3270_rcl_add(tp, input, len);
|
|
if (tp->nr_up > 0) {
|
|
tp->nr_up = 0;
|
|
tty3270_rebuild_update(tp);
|
|
tty3270_update_status(tp);
|
|
}
|
|
/* Clear input area. */
|
|
tty3270_update_prompt(tp, NULL, 0);
|
|
tty3270_set_timer(tp, 1);
|
|
} else if (tp->input->string[0] == 0x6d) {
|
|
/* Display has been cleared. Redraw. */
|
|
tp->update_flags = TTY_UPDATE_ALL;
|
|
tty3270_set_timer(tp, 1);
|
|
}
|
|
spin_unlock_bh(&tp->view.lock);
|
|
|
|
/* Start keyboard reset command. */
|
|
raw3270_request_reset(tp->kreset);
|
|
raw3270_request_set_cmd(tp->kreset, TC_WRITE);
|
|
raw3270_request_add_data(tp->kreset, &kreset_data, 1);
|
|
raw3270_start(&tp->view, tp->kreset);
|
|
|
|
while (len-- > 0)
|
|
kbd_keycode(tp->kbd, *input++);
|
|
/* Emit keycode for AID byte. */
|
|
kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
|
|
|
|
raw3270_request_reset(rrq);
|
|
xchg(&tp->read, rrq);
|
|
raw3270_put_view(&tp->view);
|
|
}
|
|
|
|
/*
|
|
* Read request completion callback.
|
|
*/
|
|
static void
|
|
tty3270_read_callback(struct raw3270_request *rq, void *data)
|
|
{
|
|
struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
|
|
raw3270_get_view(rq->view);
|
|
/* Schedule tasklet to pass input to tty. */
|
|
tasklet_schedule(&tp->readlet);
|
|
}
|
|
|
|
/*
|
|
* Issue a read request. Call with device lock.
|
|
*/
|
|
static void
|
|
tty3270_issue_read(struct tty3270 *tp, int lock)
|
|
{
|
|
struct raw3270_request *rrq;
|
|
int rc;
|
|
|
|
rrq = xchg(&tp->read, 0);
|
|
if (!rrq)
|
|
/* Read already scheduled. */
|
|
return;
|
|
rrq->callback = tty3270_read_callback;
|
|
rrq->callback_data = tp;
|
|
raw3270_request_set_cmd(rrq, TC_READMOD);
|
|
raw3270_request_set_data(rrq, tp->input->string, tp->input->len);
|
|
/* Issue the read modified request. */
|
|
if (lock) {
|
|
rc = raw3270_start(&tp->view, rrq);
|
|
} else
|
|
rc = raw3270_start_irq(&tp->view, rrq);
|
|
if (rc) {
|
|
raw3270_request_reset(rrq);
|
|
xchg(&tp->read, rrq);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Switch to the tty view.
|
|
*/
|
|
static int
|
|
tty3270_activate(struct raw3270_view *view)
|
|
{
|
|
struct tty3270 *tp = container_of(view, struct tty3270, view);
|
|
|
|
tp->update_flags = TTY_UPDATE_ALL;
|
|
tty3270_set_timer(tp, 1);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
tty3270_deactivate(struct raw3270_view *view)
|
|
{
|
|
struct tty3270 *tp = container_of(view, struct tty3270, view);
|
|
|
|
del_timer(&tp->timer);
|
|
}
|
|
|
|
static int
|
|
tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
|
|
{
|
|
/* Handle ATTN. Schedule tasklet to read aid. */
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
|
|
if (!tp->throttle)
|
|
tty3270_issue_read(tp, 0);
|
|
else
|
|
tp->attn = 1;
|
|
}
|
|
|
|
if (rq) {
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
|
|
rq->rc = -EIO;
|
|
else
|
|
/* Normal end. Copy residual count. */
|
|
rq->rescnt = irb->scsw.cmd.count;
|
|
}
|
|
return RAW3270_IO_DONE;
|
|
}
|
|
|
|
/*
|
|
* Allocate tty3270 structure.
|
|
*/
|
|
static struct tty3270 *
|
|
tty3270_alloc_view(void)
|
|
{
|
|
struct tty3270 *tp;
|
|
int pages;
|
|
|
|
tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL);
|
|
if (!tp)
|
|
goto out_err;
|
|
tp->freemem_pages =
|
|
kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL);
|
|
if (!tp->freemem_pages)
|
|
goto out_tp;
|
|
INIT_LIST_HEAD(&tp->freemem);
|
|
INIT_LIST_HEAD(&tp->lines);
|
|
INIT_LIST_HEAD(&tp->update);
|
|
INIT_LIST_HEAD(&tp->rcl_lines);
|
|
tp->rcl_max = 20;
|
|
tty_port_init(&tp->port);
|
|
setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update,
|
|
(unsigned long) tp);
|
|
tasklet_init(&tp->readlet,
|
|
(void (*)(unsigned long)) tty3270_read_tasklet,
|
|
(unsigned long) tp->read);
|
|
|
|
for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
|
|
tp->freemem_pages[pages] = (void *)
|
|
__get_free_pages(GFP_KERNEL|GFP_DMA, 0);
|
|
if (!tp->freemem_pages[pages])
|
|
goto out_pages;
|
|
add_string_memory(&tp->freemem,
|
|
tp->freemem_pages[pages], PAGE_SIZE);
|
|
}
|
|
tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
|
|
if (IS_ERR(tp->write))
|
|
goto out_pages;
|
|
tp->read = raw3270_request_alloc(0);
|
|
if (IS_ERR(tp->read))
|
|
goto out_write;
|
|
tp->kreset = raw3270_request_alloc(1);
|
|
if (IS_ERR(tp->kreset))
|
|
goto out_read;
|
|
tp->kbd = kbd_alloc();
|
|
if (!tp->kbd)
|
|
goto out_reset;
|
|
return tp;
|
|
|
|
out_reset:
|
|
raw3270_request_free(tp->kreset);
|
|
out_read:
|
|
raw3270_request_free(tp->read);
|
|
out_write:
|
|
raw3270_request_free(tp->write);
|
|
out_pages:
|
|
while (pages--)
|
|
free_pages((unsigned long) tp->freemem_pages[pages], 0);
|
|
kfree(tp->freemem_pages);
|
|
out_tp:
|
|
kfree(tp);
|
|
out_err:
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
/*
|
|
* Free tty3270 structure.
|
|
*/
|
|
static void
|
|
tty3270_free_view(struct tty3270 *tp)
|
|
{
|
|
int pages;
|
|
|
|
del_timer_sync(&tp->timer);
|
|
kbd_free(tp->kbd);
|
|
raw3270_request_free(tp->kreset);
|
|
raw3270_request_free(tp->read);
|
|
raw3270_request_free(tp->write);
|
|
for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
|
|
free_pages((unsigned long) tp->freemem_pages[pages], 0);
|
|
kfree(tp->freemem_pages);
|
|
kfree(tp);
|
|
}
|
|
|
|
/*
|
|
* Allocate tty3270 screen.
|
|
*/
|
|
static int
|
|
tty3270_alloc_screen(struct tty3270 *tp)
|
|
{
|
|
unsigned long size;
|
|
int lines;
|
|
|
|
size = sizeof(struct tty3270_line) * (tp->view.rows - 2);
|
|
tp->screen = kzalloc(size, GFP_KERNEL);
|
|
if (!tp->screen)
|
|
goto out_err;
|
|
for (lines = 0; lines < tp->view.rows - 2; lines++) {
|
|
size = sizeof(struct tty3270_cell) * tp->view.cols;
|
|
tp->screen[lines].cells = kzalloc(size, GFP_KERNEL);
|
|
if (!tp->screen[lines].cells)
|
|
goto out_screen;
|
|
}
|
|
return 0;
|
|
out_screen:
|
|
while (lines--)
|
|
kfree(tp->screen[lines].cells);
|
|
kfree(tp->screen);
|
|
out_err:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Free tty3270 screen.
|
|
*/
|
|
static void
|
|
tty3270_free_screen(struct tty3270 *tp)
|
|
{
|
|
int lines;
|
|
|
|
for (lines = 0; lines < tp->view.rows - 2; lines++)
|
|
kfree(tp->screen[lines].cells);
|
|
kfree(tp->screen);
|
|
}
|
|
|
|
/*
|
|
* Unlink tty3270 data structure from tty.
|
|
*/
|
|
static void
|
|
tty3270_release(struct raw3270_view *view)
|
|
{
|
|
struct tty3270 *tp = container_of(view, struct tty3270, view);
|
|
struct tty_struct *tty = tty_port_tty_get(&tp->port);
|
|
|
|
if (tty) {
|
|
tty->driver_data = NULL;
|
|
tty_port_tty_set(&tp->port, NULL);
|
|
tty_hangup(tty);
|
|
raw3270_put_view(&tp->view);
|
|
tty_kref_put(tty);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free tty3270 data structure
|
|
*/
|
|
static void
|
|
tty3270_free(struct raw3270_view *view)
|
|
{
|
|
struct tty3270 *tp = container_of(view, struct tty3270, view);
|
|
tty3270_free_screen(tp);
|
|
tty3270_free_view(tp);
|
|
}
|
|
|
|
/*
|
|
* Delayed freeing of tty3270 views.
|
|
*/
|
|
static void
|
|
tty3270_del_views(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < tty3270_max_index; i++) {
|
|
struct raw3270_view *view =
|
|
raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR);
|
|
if (!IS_ERR(view))
|
|
raw3270_del_view(view);
|
|
}
|
|
}
|
|
|
|
static struct raw3270_fn tty3270_fn = {
|
|
.activate = tty3270_activate,
|
|
.deactivate = tty3270_deactivate,
|
|
.intv = (void *) tty3270_irq,
|
|
.release = tty3270_release,
|
|
.free = tty3270_free
|
|
};
|
|
|
|
/*
|
|
* This routine is called whenever a 3270 tty is opened first time.
|
|
*/
|
|
static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
|
|
{
|
|
struct raw3270_view *view;
|
|
struct tty3270 *tp;
|
|
int i, rc;
|
|
|
|
/* Check if the tty3270 is already there. */
|
|
view = raw3270_find_view(&tty3270_fn,
|
|
tty->index + RAW3270_FIRSTMINOR);
|
|
if (!IS_ERR(view)) {
|
|
tp = container_of(view, struct tty3270, view);
|
|
tty->driver_data = tp;
|
|
tty->winsize.ws_row = tp->view.rows - 2;
|
|
tty->winsize.ws_col = tp->view.cols;
|
|
tty->low_latency = 0;
|
|
/* why to reassign? */
|
|
tty_port_tty_set(&tp->port, tty);
|
|
tp->inattr = TF_INPUT;
|
|
return tty_port_install(&tp->port, driver, tty);
|
|
}
|
|
if (tty3270_max_index < tty->index + 1)
|
|
tty3270_max_index = tty->index + 1;
|
|
|
|
/* Quick exit if there is no device for tty->index. */
|
|
if (PTR_ERR(view) == -ENODEV)
|
|
return -ENODEV;
|
|
|
|
/* Allocate tty3270 structure on first open. */
|
|
tp = tty3270_alloc_view();
|
|
if (IS_ERR(tp))
|
|
return PTR_ERR(tp);
|
|
|
|
rc = raw3270_add_view(&tp->view, &tty3270_fn,
|
|
tty->index + RAW3270_FIRSTMINOR);
|
|
if (rc) {
|
|
tty3270_free_view(tp);
|
|
return rc;
|
|
}
|
|
|
|
rc = tty3270_alloc_screen(tp);
|
|
if (rc) {
|
|
raw3270_put_view(&tp->view);
|
|
raw3270_del_view(&tp->view);
|
|
return rc;
|
|
}
|
|
|
|
tty_port_tty_set(&tp->port, tty);
|
|
tty->low_latency = 0;
|
|
tty->winsize.ws_row = tp->view.rows - 2;
|
|
tty->winsize.ws_col = tp->view.cols;
|
|
|
|
tty3270_create_prompt(tp);
|
|
tty3270_create_status(tp);
|
|
tty3270_update_status(tp);
|
|
|
|
/* Create blank line for every line in the tty output area. */
|
|
for (i = 0; i < tp->view.rows - 2; i++)
|
|
tty3270_blank_line(tp);
|
|
|
|
tp->kbd->port = &tp->port;
|
|
tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
|
|
tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
|
|
tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
|
|
tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward;
|
|
kbd_ascebc(tp->kbd, tp->view.ascebc);
|
|
|
|
raw3270_activate_view(&tp->view);
|
|
|
|
rc = tty_port_install(&tp->port, driver, tty);
|
|
if (rc) {
|
|
raw3270_put_view(&tp->view);
|
|
return rc;
|
|
}
|
|
|
|
tty->driver_data = tp;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine is called when the 3270 tty is closed. We wait
|
|
* for the remaining request to be completed. Then we clean up.
|
|
*/
|
|
static void
|
|
tty3270_close(struct tty_struct *tty, struct file * filp)
|
|
{
|
|
struct tty3270 *tp = tty->driver_data;
|
|
|
|
if (tty->count > 1)
|
|
return;
|
|
if (tp) {
|
|
tty->driver_data = NULL;
|
|
tty_port_tty_set(&tp->port, NULL);
|
|
}
|
|
}
|
|
|
|
static void tty3270_cleanup(struct tty_struct *tty)
|
|
{
|
|
struct tty3270 *tp = tty->driver_data;
|
|
|
|
if (tp)
|
|
raw3270_put_view(&tp->view);
|
|
}
|
|
|
|
/*
|
|
* We always have room.
|
|
*/
|
|
static int
|
|
tty3270_write_room(struct tty_struct *tty)
|
|
{
|
|
return INT_MAX;
|
|
}
|
|
|
|
/*
|
|
* Insert character into the screen at the current position with the
|
|
* current color and highlight. This function does NOT do cursor movement.
|
|
*/
|
|
static void tty3270_put_character(struct tty3270 *tp, char ch)
|
|
{
|
|
struct tty3270_line *line;
|
|
struct tty3270_cell *cell;
|
|
|
|
line = tp->screen + tp->cy;
|
|
if (line->len <= tp->cx) {
|
|
while (line->len < tp->cx) {
|
|
cell = line->cells + line->len;
|
|
cell->character = tp->view.ascebc[' '];
|
|
cell->highlight = tp->highlight;
|
|
cell->f_color = tp->f_color;
|
|
line->len++;
|
|
}
|
|
line->len++;
|
|
}
|
|
cell = line->cells + tp->cx;
|
|
cell->character = tp->view.ascebc[(unsigned int) ch];
|
|
cell->highlight = tp->highlight;
|
|
cell->f_color = tp->f_color;
|
|
}
|
|
|
|
/*
|
|
* Convert a tty3270_line to a 3270 data fragment usable for output.
|
|
*/
|
|
static void
|
|
tty3270_convert_line(struct tty3270 *tp, int line_nr)
|
|
{
|
|
struct tty3270_line *line;
|
|
struct tty3270_cell *cell;
|
|
struct string *s, *n;
|
|
unsigned char highlight;
|
|
unsigned char f_color;
|
|
char *cp;
|
|
int flen, i;
|
|
|
|
/* Determine how long the fragment will be. */
|
|
flen = 3; /* Prefix (TO_SBA). */
|
|
line = tp->screen + line_nr;
|
|
flen += line->len;
|
|
highlight = TAX_RESET;
|
|
f_color = TAC_RESET;
|
|
for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
|
|
if (cell->highlight != highlight) {
|
|
flen += 3; /* TO_SA to switch highlight. */
|
|
highlight = cell->highlight;
|
|
}
|
|
if (cell->f_color != f_color) {
|
|
flen += 3; /* TO_SA to switch color. */
|
|
f_color = cell->f_color;
|
|
}
|
|
}
|
|
if (highlight != TAX_RESET)
|
|
flen += 3; /* TO_SA to reset hightlight. */
|
|
if (f_color != TAC_RESET)
|
|
flen += 3; /* TO_SA to reset color. */
|
|
if (line->len < tp->view.cols)
|
|
flen += 4; /* Postfix (TO_RA). */
|
|
|
|
/* Find the line in the list. */
|
|
i = tp->view.rows - 2 - line_nr;
|
|
list_for_each_entry_reverse(s, &tp->lines, list)
|
|
if (--i <= 0)
|
|
break;
|
|
/*
|
|
* Check if the line needs to get reallocated.
|
|
*/
|
|
if (s->len != flen) {
|
|
/* Reallocate string. */
|
|
n = tty3270_alloc_string(tp, flen);
|
|
list_add(&n->list, &s->list);
|
|
list_del_init(&s->list);
|
|
if (!list_empty(&s->update))
|
|
list_del_init(&s->update);
|
|
free_string(&tp->freemem, s);
|
|
s = n;
|
|
}
|
|
|
|
/* Write 3270 data fragment. */
|
|
cp = s->string;
|
|
*cp++ = TO_SBA;
|
|
*cp++ = 0;
|
|
*cp++ = 0;
|
|
|
|
highlight = TAX_RESET;
|
|
f_color = TAC_RESET;
|
|
for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
|
|
if (cell->highlight != highlight) {
|
|
*cp++ = TO_SA;
|
|
*cp++ = TAT_EXTHI;
|
|
*cp++ = cell->highlight;
|
|
highlight = cell->highlight;
|
|
}
|
|
if (cell->f_color != f_color) {
|
|
*cp++ = TO_SA;
|
|
*cp++ = TAT_COLOR;
|
|
*cp++ = cell->f_color;
|
|
f_color = cell->f_color;
|
|
}
|
|
*cp++ = cell->character;
|
|
}
|
|
if (highlight != TAX_RESET) {
|
|
*cp++ = TO_SA;
|
|
*cp++ = TAT_EXTHI;
|
|
*cp++ = TAX_RESET;
|
|
}
|
|
if (f_color != TAC_RESET) {
|
|
*cp++ = TO_SA;
|
|
*cp++ = TAT_COLOR;
|
|
*cp++ = TAC_RESET;
|
|
}
|
|
if (line->len < tp->view.cols) {
|
|
*cp++ = TO_RA;
|
|
*cp++ = 0;
|
|
*cp++ = 0;
|
|
*cp++ = 0;
|
|
}
|
|
|
|
if (tp->nr_up + line_nr < tp->view.rows - 2) {
|
|
/* Line is currently visible on screen. */
|
|
tty3270_update_string(tp, s, line_nr);
|
|
/* Add line to update list. */
|
|
if (list_empty(&s->update)) {
|
|
list_add_tail(&s->update, &tp->update);
|
|
tp->update_flags |= TTY_UPDATE_LIST;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do carriage return.
|
|
*/
|
|
static void
|
|
tty3270_cr(struct tty3270 *tp)
|
|
{
|
|
tp->cx = 0;
|
|
}
|
|
|
|
/*
|
|
* Do line feed.
|
|
*/
|
|
static void
|
|
tty3270_lf(struct tty3270 *tp)
|
|
{
|
|
struct tty3270_line temp;
|
|
int i;
|
|
|
|
tty3270_convert_line(tp, tp->cy);
|
|
if (tp->cy < tp->view.rows - 3) {
|
|
tp->cy++;
|
|
return;
|
|
}
|
|
/* Last line just filled up. Add new, blank line. */
|
|
tty3270_blank_line(tp);
|
|
temp = tp->screen[0];
|
|
temp.len = 0;
|
|
for (i = 0; i < tp->view.rows - 3; i++)
|
|
tp->screen[i] = tp->screen[i+1];
|
|
tp->screen[tp->view.rows - 3] = temp;
|
|
tty3270_rebuild_update(tp);
|
|
}
|
|
|
|
static void
|
|
tty3270_ri(struct tty3270 *tp)
|
|
{
|
|
if (tp->cy > 0) {
|
|
tty3270_convert_line(tp, tp->cy);
|
|
tp->cy--;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Insert characters at current position.
|
|
*/
|
|
static void
|
|
tty3270_insert_characters(struct tty3270 *tp, int n)
|
|
{
|
|
struct tty3270_line *line;
|
|
int k;
|
|
|
|
line = tp->screen + tp->cy;
|
|
while (line->len < tp->cx) {
|
|
line->cells[line->len].character = tp->view.ascebc[' '];
|
|
line->cells[line->len].highlight = TAX_RESET;
|
|
line->cells[line->len].f_color = TAC_RESET;
|
|
line->len++;
|
|
}
|
|
if (n > tp->view.cols - tp->cx)
|
|
n = tp->view.cols - tp->cx;
|
|
k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n);
|
|
while (k--)
|
|
line->cells[tp->cx + n + k] = line->cells[tp->cx + k];
|
|
line->len += n;
|
|
if (line->len > tp->view.cols)
|
|
line->len = tp->view.cols;
|
|
while (n-- > 0) {
|
|
line->cells[tp->cx + n].character = tp->view.ascebc[' '];
|
|
line->cells[tp->cx + n].highlight = tp->highlight;
|
|
line->cells[tp->cx + n].f_color = tp->f_color;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete characters at current position.
|
|
*/
|
|
static void
|
|
tty3270_delete_characters(struct tty3270 *tp, int n)
|
|
{
|
|
struct tty3270_line *line;
|
|
int i;
|
|
|
|
line = tp->screen + tp->cy;
|
|
if (line->len <= tp->cx)
|
|
return;
|
|
if (line->len - tp->cx <= n) {
|
|
line->len = tp->cx;
|
|
return;
|
|
}
|
|
for (i = tp->cx; i + n < line->len; i++)
|
|
line->cells[i] = line->cells[i + n];
|
|
line->len -= n;
|
|
}
|
|
|
|
/*
|
|
* Erase characters at current position.
|
|
*/
|
|
static void
|
|
tty3270_erase_characters(struct tty3270 *tp, int n)
|
|
{
|
|
struct tty3270_line *line;
|
|
struct tty3270_cell *cell;
|
|
|
|
line = tp->screen + tp->cy;
|
|
while (line->len > tp->cx && n-- > 0) {
|
|
cell = line->cells + tp->cx++;
|
|
cell->character = ' ';
|
|
cell->highlight = TAX_RESET;
|
|
cell->f_color = TAC_RESET;
|
|
}
|
|
tp->cx += n;
|
|
tp->cx = min_t(int, tp->cx, tp->view.cols - 1);
|
|
}
|
|
|
|
/*
|
|
* Erase line, 3 different cases:
|
|
* Esc [ 0 K Erase from current position to end of line inclusive
|
|
* Esc [ 1 K Erase from beginning of line to current position inclusive
|
|
* Esc [ 2 K Erase entire line (without moving cursor)
|
|
*/
|
|
static void
|
|
tty3270_erase_line(struct tty3270 *tp, int mode)
|
|
{
|
|
struct tty3270_line *line;
|
|
struct tty3270_cell *cell;
|
|
int i;
|
|
|
|
line = tp->screen + tp->cy;
|
|
if (mode == 0)
|
|
line->len = tp->cx;
|
|
else if (mode == 1) {
|
|
for (i = 0; i < tp->cx; i++) {
|
|
cell = line->cells + i;
|
|
cell->character = ' ';
|
|
cell->highlight = TAX_RESET;
|
|
cell->f_color = TAC_RESET;
|
|
}
|
|
if (line->len <= tp->cx)
|
|
line->len = tp->cx + 1;
|
|
} else if (mode == 2)
|
|
line->len = 0;
|
|
tty3270_convert_line(tp, tp->cy);
|
|
}
|
|
|
|
/*
|
|
* Erase display, 3 different cases:
|
|
* Esc [ 0 J Erase from current position to bottom of screen inclusive
|
|
* Esc [ 1 J Erase from top of screen to current position inclusive
|
|
* Esc [ 2 J Erase entire screen (without moving the cursor)
|
|
*/
|
|
static void
|
|
tty3270_erase_display(struct tty3270 *tp, int mode)
|
|
{
|
|
int i;
|
|
|
|
if (mode == 0) {
|
|
tty3270_erase_line(tp, 0);
|
|
for (i = tp->cy + 1; i < tp->view.rows - 2; i++) {
|
|
tp->screen[i].len = 0;
|
|
tty3270_convert_line(tp, i);
|
|
}
|
|
} else if (mode == 1) {
|
|
for (i = 0; i < tp->cy; i++) {
|
|
tp->screen[i].len = 0;
|
|
tty3270_convert_line(tp, i);
|
|
}
|
|
tty3270_erase_line(tp, 1);
|
|
} else if (mode == 2) {
|
|
for (i = 0; i < tp->view.rows - 2; i++) {
|
|
tp->screen[i].len = 0;
|
|
tty3270_convert_line(tp, i);
|
|
}
|
|
}
|
|
tty3270_rebuild_update(tp);
|
|
}
|
|
|
|
/*
|
|
* Set attributes found in an escape sequence.
|
|
* Esc [ <attr> ; <attr> ; ... m
|
|
*/
|
|
static void
|
|
tty3270_set_attributes(struct tty3270 *tp)
|
|
{
|
|
static unsigned char f_colors[] = {
|
|
TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE,
|
|
TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT
|
|
};
|
|
int i, attr;
|
|
|
|
for (i = 0; i <= tp->esc_npar; i++) {
|
|
attr = tp->esc_par[i];
|
|
switch (attr) {
|
|
case 0: /* Reset */
|
|
tp->highlight = TAX_RESET;
|
|
tp->f_color = TAC_RESET;
|
|
break;
|
|
/* Highlight. */
|
|
case 4: /* Start underlining. */
|
|
tp->highlight = TAX_UNDER;
|
|
break;
|
|
case 5: /* Start blink. */
|
|
tp->highlight = TAX_BLINK;
|
|
break;
|
|
case 7: /* Start reverse. */
|
|
tp->highlight = TAX_REVER;
|
|
break;
|
|
case 24: /* End underlining */
|
|
if (tp->highlight == TAX_UNDER)
|
|
tp->highlight = TAX_RESET;
|
|
break;
|
|
case 25: /* End blink. */
|
|
if (tp->highlight == TAX_BLINK)
|
|
tp->highlight = TAX_RESET;
|
|
break;
|
|
case 27: /* End reverse. */
|
|
if (tp->highlight == TAX_REVER)
|
|
tp->highlight = TAX_RESET;
|
|
break;
|
|
/* Foreground color. */
|
|
case 30: /* Black */
|
|
case 31: /* Red */
|
|
case 32: /* Green */
|
|
case 33: /* Yellow */
|
|
case 34: /* Blue */
|
|
case 35: /* Magenta */
|
|
case 36: /* Cyan */
|
|
case 37: /* White */
|
|
case 39: /* Black */
|
|
tp->f_color = f_colors[attr - 30];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline int
|
|
tty3270_getpar(struct tty3270 *tp, int ix)
|
|
{
|
|
return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1;
|
|
}
|
|
|
|
static void
|
|
tty3270_goto_xy(struct tty3270 *tp, int cx, int cy)
|
|
{
|
|
int max_cx = max(0, cx);
|
|
int max_cy = max(0, cy);
|
|
|
|
tp->cx = min_t(int, tp->view.cols - 1, max_cx);
|
|
cy = min_t(int, tp->view.rows - 3, max_cy);
|
|
if (cy != tp->cy) {
|
|
tty3270_convert_line(tp, tp->cy);
|
|
tp->cy = cy;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Process escape sequences. Known sequences:
|
|
* Esc 7 Save Cursor Position
|
|
* Esc 8 Restore Cursor Position
|
|
* Esc [ Pn ; Pn ; .. m Set attributes
|
|
* Esc [ Pn ; Pn H Cursor Position
|
|
* Esc [ Pn ; Pn f Cursor Position
|
|
* Esc [ Pn A Cursor Up
|
|
* Esc [ Pn B Cursor Down
|
|
* Esc [ Pn C Cursor Forward
|
|
* Esc [ Pn D Cursor Backward
|
|
* Esc [ Pn G Cursor Horizontal Absolute
|
|
* Esc [ Pn X Erase Characters
|
|
* Esc [ Ps J Erase in Display
|
|
* Esc [ Ps K Erase in Line
|
|
* // FIXME: add all the new ones.
|
|
*
|
|
* Pn is a numeric parameter, a string of zero or more decimal digits.
|
|
* Ps is a selective parameter.
|
|
*/
|
|
static void
|
|
tty3270_escape_sequence(struct tty3270 *tp, char ch)
|
|
{
|
|
enum { ESnormal, ESesc, ESsquare, ESgetpars };
|
|
|
|
if (tp->esc_state == ESnormal) {
|
|
if (ch == 0x1b)
|
|
/* Starting new escape sequence. */
|
|
tp->esc_state = ESesc;
|
|
return;
|
|
}
|
|
if (tp->esc_state == ESesc) {
|
|
tp->esc_state = ESnormal;
|
|
switch (ch) {
|
|
case '[':
|
|
tp->esc_state = ESsquare;
|
|
break;
|
|
case 'E':
|
|
tty3270_cr(tp);
|
|
tty3270_lf(tp);
|
|
break;
|
|
case 'M':
|
|
tty3270_ri(tp);
|
|
break;
|
|
case 'D':
|
|
tty3270_lf(tp);
|
|
break;
|
|
case 'Z': /* Respond ID. */
|
|
kbd_puts_queue(&tp->port, "\033[?6c");
|
|
break;
|
|
case '7': /* Save cursor position. */
|
|
tp->saved_cx = tp->cx;
|
|
tp->saved_cy = tp->cy;
|
|
tp->saved_highlight = tp->highlight;
|
|
tp->saved_f_color = tp->f_color;
|
|
break;
|
|
case '8': /* Restore cursor position. */
|
|
tty3270_convert_line(tp, tp->cy);
|
|
tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
|
|
tp->highlight = tp->saved_highlight;
|
|
tp->f_color = tp->saved_f_color;
|
|
break;
|
|
case 'c': /* Reset terminal. */
|
|
tp->cx = tp->saved_cx = 0;
|
|
tp->cy = tp->saved_cy = 0;
|
|
tp->highlight = tp->saved_highlight = TAX_RESET;
|
|
tp->f_color = tp->saved_f_color = TAC_RESET;
|
|
tty3270_erase_display(tp, 2);
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
if (tp->esc_state == ESsquare) {
|
|
tp->esc_state = ESgetpars;
|
|
memset(tp->esc_par, 0, sizeof(tp->esc_par));
|
|
tp->esc_npar = 0;
|
|
tp->esc_ques = (ch == '?');
|
|
if (tp->esc_ques)
|
|
return;
|
|
}
|
|
if (tp->esc_state == ESgetpars) {
|
|
if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) {
|
|
tp->esc_npar++;
|
|
return;
|
|
}
|
|
if (ch >= '0' && ch <= '9') {
|
|
tp->esc_par[tp->esc_npar] *= 10;
|
|
tp->esc_par[tp->esc_npar] += ch - '0';
|
|
return;
|
|
}
|
|
}
|
|
tp->esc_state = ESnormal;
|
|
if (ch == 'n' && !tp->esc_ques) {
|
|
if (tp->esc_par[0] == 5) /* Status report. */
|
|
kbd_puts_queue(&tp->port, "\033[0n");
|
|
else if (tp->esc_par[0] == 6) { /* Cursor report. */
|
|
char buf[40];
|
|
sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
|
|
kbd_puts_queue(&tp->port, buf);
|
|
}
|
|
return;
|
|
}
|
|
if (tp->esc_ques)
|
|
return;
|
|
switch (ch) {
|
|
case 'm':
|
|
tty3270_set_attributes(tp);
|
|
break;
|
|
case 'H': /* Set cursor position. */
|
|
case 'f':
|
|
tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1,
|
|
tty3270_getpar(tp, 0) - 1);
|
|
break;
|
|
case 'd': /* Set y position. */
|
|
tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1);
|
|
break;
|
|
case 'A': /* Cursor up. */
|
|
case 'F':
|
|
tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0));
|
|
break;
|
|
case 'B': /* Cursor down. */
|
|
case 'e':
|
|
case 'E':
|
|
tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0));
|
|
break;
|
|
case 'C': /* Cursor forward. */
|
|
case 'a':
|
|
tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy);
|
|
break;
|
|
case 'D': /* Cursor backward. */
|
|
tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy);
|
|
break;
|
|
case 'G': /* Set x position. */
|
|
case '`':
|
|
tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy);
|
|
break;
|
|
case 'X': /* Erase Characters. */
|
|
tty3270_erase_characters(tp, tty3270_getpar(tp, 0));
|
|
break;
|
|
case 'J': /* Erase display. */
|
|
tty3270_erase_display(tp, tp->esc_par[0]);
|
|
break;
|
|
case 'K': /* Erase line. */
|
|
tty3270_erase_line(tp, tp->esc_par[0]);
|
|
break;
|
|
case 'P': /* Delete characters. */
|
|
tty3270_delete_characters(tp, tty3270_getpar(tp, 0));
|
|
break;
|
|
case '@': /* Insert characters. */
|
|
tty3270_insert_characters(tp, tty3270_getpar(tp, 0));
|
|
break;
|
|
case 's': /* Save cursor position. */
|
|
tp->saved_cx = tp->cx;
|
|
tp->saved_cy = tp->cy;
|
|
tp->saved_highlight = tp->highlight;
|
|
tp->saved_f_color = tp->f_color;
|
|
break;
|
|
case 'u': /* Restore cursor position. */
|
|
tty3270_convert_line(tp, tp->cy);
|
|
tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
|
|
tp->highlight = tp->saved_highlight;
|
|
tp->f_color = tp->saved_f_color;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* String write routine for 3270 ttys
|
|
*/
|
|
static void
|
|
tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty,
|
|
const unsigned char *buf, int count)
|
|
{
|
|
int i_msg, i;
|
|
|
|
spin_lock_bh(&tp->view.lock);
|
|
for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) {
|
|
if (tp->esc_state != 0) {
|
|
/* Continue escape sequence. */
|
|
tty3270_escape_sequence(tp, buf[i_msg]);
|
|
continue;
|
|
}
|
|
|
|
switch (buf[i_msg]) {
|
|
case 0x07: /* '\a' -- Alarm */
|
|
tp->wcc |= TW_PLUSALARM;
|
|
break;
|
|
case 0x08: /* Backspace. */
|
|
if (tp->cx > 0) {
|
|
tp->cx--;
|
|
tty3270_put_character(tp, ' ');
|
|
}
|
|
break;
|
|
case 0x09: /* '\t' -- Tabulate */
|
|
for (i = tp->cx % 8; i < 8; i++) {
|
|
if (tp->cx >= tp->view.cols) {
|
|
tty3270_cr(tp);
|
|
tty3270_lf(tp);
|
|
break;
|
|
}
|
|
tty3270_put_character(tp, ' ');
|
|
tp->cx++;
|
|
}
|
|
break;
|
|
case 0x0a: /* '\n' -- New Line */
|
|
tty3270_cr(tp);
|
|
tty3270_lf(tp);
|
|
break;
|
|
case 0x0c: /* '\f' -- Form Feed */
|
|
tty3270_erase_display(tp, 2);
|
|
tp->cx = tp->cy = 0;
|
|
break;
|
|
case 0x0d: /* '\r' -- Carriage Return */
|
|
tp->cx = 0;
|
|
break;
|
|
case 0x0f: /* SuSE "exit alternate mode" */
|
|
break;
|
|
case 0x1b: /* Start escape sequence. */
|
|
tty3270_escape_sequence(tp, buf[i_msg]);
|
|
break;
|
|
default: /* Insert normal character. */
|
|
if (tp->cx >= tp->view.cols) {
|
|
tty3270_cr(tp);
|
|
tty3270_lf(tp);
|
|
}
|
|
tty3270_put_character(tp, buf[i_msg]);
|
|
tp->cx++;
|
|
break;
|
|
}
|
|
}
|
|
/* Convert current line to 3270 data fragment. */
|
|
tty3270_convert_line(tp, tp->cy);
|
|
|
|
/* Setup timer to update display after 1/10 second */
|
|
if (!timer_pending(&tp->timer))
|
|
tty3270_set_timer(tp, HZ/10);
|
|
|
|
spin_unlock_bh(&tp->view.lock);
|
|
}
|
|
|
|
/*
|
|
* String write routine for 3270 ttys
|
|
*/
|
|
static int
|
|
tty3270_write(struct tty_struct * tty,
|
|
const unsigned char *buf, int count)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return 0;
|
|
if (tp->char_count > 0) {
|
|
tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
|
|
tp->char_count = 0;
|
|
}
|
|
tty3270_do_write(tp, tty, buf, count);
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* Put single characters to the ttys character buffer
|
|
*/
|
|
static int tty3270_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE)
|
|
return 0;
|
|
tp->char_buf[tp->char_count++] = ch;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Flush all characters from the ttys characeter buffer put there
|
|
* by tty3270_put_char.
|
|
*/
|
|
static void
|
|
tty3270_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return;
|
|
if (tp->char_count > 0) {
|
|
tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
|
|
tp->char_count = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns the number of characters in the output buffer. This is
|
|
* used in tty_wait_until_sent to wait until all characters have
|
|
* appeared on the screen.
|
|
*/
|
|
static int
|
|
tty3270_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
tty3270_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Check for visible/invisible input switches
|
|
*/
|
|
static void
|
|
tty3270_set_termios(struct tty_struct *tty, struct ktermios *old)
|
|
{
|
|
struct tty3270 *tp;
|
|
int new;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return;
|
|
spin_lock_bh(&tp->view.lock);
|
|
if (L_ICANON(tty)) {
|
|
new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
|
|
if (new != tp->inattr) {
|
|
tp->inattr = new;
|
|
tty3270_update_prompt(tp, NULL, 0);
|
|
tty3270_set_timer(tp, 1);
|
|
}
|
|
}
|
|
spin_unlock_bh(&tp->view.lock);
|
|
}
|
|
|
|
/*
|
|
* Disable reading from a 3270 tty
|
|
*/
|
|
static void
|
|
tty3270_throttle(struct tty_struct * tty)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return;
|
|
tp->throttle = 1;
|
|
}
|
|
|
|
/*
|
|
* Enable reading from a 3270 tty
|
|
*/
|
|
static void
|
|
tty3270_unthrottle(struct tty_struct * tty)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return;
|
|
tp->throttle = 0;
|
|
if (tp->attn)
|
|
tty3270_issue_read(tp, 1);
|
|
}
|
|
|
|
/*
|
|
* Hang up the tty device.
|
|
*/
|
|
static void
|
|
tty3270_hangup(struct tty_struct *tty)
|
|
{
|
|
// FIXME: implement
|
|
}
|
|
|
|
static void
|
|
tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
{
|
|
}
|
|
|
|
static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return -ENODEV;
|
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
|
return -EIO;
|
|
return kbd_ioctl(tp->kbd, cmd, arg);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static long tty3270_compat_ioctl(struct tty_struct *tty,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct tty3270 *tp;
|
|
|
|
tp = tty->driver_data;
|
|
if (!tp)
|
|
return -ENODEV;
|
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
|
return -EIO;
|
|
return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
|
|
}
|
|
#endif
|
|
|
|
static const struct tty_operations tty3270_ops = {
|
|
.install = tty3270_install,
|
|
.cleanup = tty3270_cleanup,
|
|
.close = tty3270_close,
|
|
.write = tty3270_write,
|
|
.put_char = tty3270_put_char,
|
|
.flush_chars = tty3270_flush_chars,
|
|
.write_room = tty3270_write_room,
|
|
.chars_in_buffer = tty3270_chars_in_buffer,
|
|
.flush_buffer = tty3270_flush_buffer,
|
|
.throttle = tty3270_throttle,
|
|
.unthrottle = tty3270_unthrottle,
|
|
.hangup = tty3270_hangup,
|
|
.wait_until_sent = tty3270_wait_until_sent,
|
|
.ioctl = tty3270_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = tty3270_compat_ioctl,
|
|
#endif
|
|
.set_termios = tty3270_set_termios
|
|
};
|
|
|
|
/*
|
|
* 3270 tty registration code called from tty_init().
|
|
* Most kernel services (incl. kmalloc) are available at this poimt.
|
|
*/
|
|
static int __init tty3270_init(void)
|
|
{
|
|
struct tty_driver *driver;
|
|
int ret;
|
|
|
|
driver = alloc_tty_driver(RAW3270_MAXDEVS);
|
|
if (!driver)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Initialize the tty_driver structure
|
|
* Entries in tty3270_driver that are NOT initialized:
|
|
* proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
|
|
*/
|
|
driver->driver_name = "ttyTUB";
|
|
driver->name = "ttyTUB";
|
|
driver->major = IBM_TTY3270_MAJOR;
|
|
driver->minor_start = RAW3270_FIRSTMINOR;
|
|
driver->type = TTY_DRIVER_TYPE_SYSTEM;
|
|
driver->subtype = SYSTEM_TYPE_TTY;
|
|
driver->init_termios = tty_std_termios;
|
|
driver->flags = TTY_DRIVER_RESET_TERMIOS;
|
|
tty_set_operations(driver, &tty3270_ops);
|
|
ret = tty_register_driver(driver);
|
|
if (ret) {
|
|
put_tty_driver(driver);
|
|
return ret;
|
|
}
|
|
tty3270_driver = driver;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit
|
|
tty3270_exit(void)
|
|
{
|
|
struct tty_driver *driver;
|
|
|
|
driver = tty3270_driver;
|
|
tty3270_driver = NULL;
|
|
tty_unregister_driver(driver);
|
|
put_tty_driver(driver);
|
|
tty3270_del_views();
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
|
|
|
|
module_init(tty3270_init);
|
|
module_exit(tty3270_exit);
|