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1963 lines
46 KiB
1963 lines
46 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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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 <[email protected]> |
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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/workqueue.h> |
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#include <linux/slab.h> |
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#include <linux/memblock.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 <linux/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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unsigned int n_model, n_cols, n_rows; /* New model & size */ |
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struct work_struct resize_work; |
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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 tasklet_struct hanglet; /* Tasklet to hang up the tty. */ |
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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 timer_list *); |
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static void tty3270_resize_work(struct work_struct *work); |
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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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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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* Create a blank screen and remove all lines from the history. |
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*/ |
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static void |
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tty3270_blank_screen(struct tty3270 *tp) |
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{ |
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struct string *s, *n; |
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int i; |
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for (i = 0; i < tp->view.rows - 2; i++) |
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tp->screen[i].len = 0; |
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tp->nr_up = 0; |
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list_for_each_entry_safe(s, n, &tp->lines, list) { |
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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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free_string(&tp->freemem, s); |
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} |
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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 timer_list *t) |
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{ |
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struct tty3270 *tp = from_timer(tp, t, timer); |
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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; |
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len -= 3; |
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} |
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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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if (s->string[s->len - 4] == TO_RA) |
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sba = s->string + s->len - 3; |
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else |
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sba = invalid_sba; |
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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); |
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} |
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/* |
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* Scroll forward in history. |
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*/ |
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static void |
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tty3270_scroll_forward(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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int nr_up; |
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spin_lock_bh(&tp->view.lock); |
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nr_up = tp->nr_up - tp->view.rows + 2; |
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if (nr_up < 0) |
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nr_up = 0; |
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if (nr_up != tp->nr_up) { |
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tp->nr_up = nr_up; |
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tty3270_rebuild_update(tp); |
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tty3270_update_status(tp); |
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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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/* |
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* Scroll backward in history. |
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*/ |
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static void |
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tty3270_scroll_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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int nr_up; |
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spin_lock_bh(&tp->view.lock); |
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nr_up = tp->nr_up + tp->view.rows - 2; |
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if (nr_up + tp->view.rows - 2 > tp->nr_lines) |
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nr_up = tp->nr_lines - tp->view.rows + 2; |
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if (nr_up != tp->nr_up) { |
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tp->nr_up = nr_up; |
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tty3270_rebuild_update(tp); |
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tty3270_update_status(tp); |
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tty3270_set_timer(tp, 1); |
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} |
|
spin_unlock_bh(&tp->view.lock); |
|
} |
|
|
|
/* |
|
* Pass input line to tty. |
|
*/ |
|
static void |
|
tty3270_read_tasklet(unsigned long data) |
|
{ |
|
struct raw3270_request *rrq = (struct raw3270_request *)data; |
|
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); |
|
} |
|
} |
|
|
|
/* |
|
* Hang up the tty |
|
*/ |
|
static void |
|
tty3270_hangup_tasklet(unsigned long data) |
|
{ |
|
struct tty3270 *tp = (struct tty3270 *)data; |
|
tty_port_tty_hangup(&tp->port, true); |
|
raw3270_put_view(&tp->view); |
|
} |
|
|
|
/* |
|
* 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 void |
|
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; |
|
raw3270_get_view(&tp->view); |
|
tasklet_schedule(&tp->hanglet); |
|
} else { |
|
/* Normal end. Copy residual count. */ |
|
rq->rescnt = irb->scsw.cmd.count; |
|
} |
|
} else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
|
/* Interrupt without an outstanding request -> update all */ |
|
tp->update_flags = TTY_UPDATE_ALL; |
|
tty3270_set_timer(tp, 1); |
|
} |
|
} |
|
|
|
/* |
|
* 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_array(TTY3270_STRING_PAGES, sizeof(void *), |
|
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; |
|
|
|
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; |
|
|
|
tty_port_init(&tp->port); |
|
timer_setup(&tp->timer, tty3270_update, 0); |
|
tasklet_init(&tp->readlet, tty3270_read_tasklet, |
|
(unsigned long) tp->read); |
|
tasklet_init(&tp->hanglet, tty3270_hangup_tasklet, |
|
(unsigned long) tp); |
|
INIT_WORK(&tp->resize_work, tty3270_resize_work); |
|
|
|
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); |
|
tty_port_destroy(&tp->port); |
|
out_tp: |
|
kfree(tp); |
|
out_err: |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
/* |
|
* Free tty3270 structure. |
|
*/ |
|
static void |
|
tty3270_free_view(struct tty3270 *tp) |
|
{ |
|
int pages; |
|
|
|
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); |
|
tty_port_destroy(&tp->port); |
|
kfree(tp); |
|
} |
|
|
|
/* |
|
* Allocate tty3270 screen. |
|
*/ |
|
static struct tty3270_line * |
|
tty3270_alloc_screen(unsigned int rows, unsigned int cols) |
|
{ |
|
struct tty3270_line *screen; |
|
unsigned long size; |
|
int lines; |
|
|
|
size = sizeof(struct tty3270_line) * (rows - 2); |
|
screen = kzalloc(size, GFP_KERNEL); |
|
if (!screen) |
|
goto out_err; |
|
for (lines = 0; lines < rows - 2; lines++) { |
|
size = sizeof(struct tty3270_cell) * cols; |
|
screen[lines].cells = kzalloc(size, GFP_KERNEL); |
|
if (!screen[lines].cells) |
|
goto out_screen; |
|
} |
|
return screen; |
|
out_screen: |
|
while (lines--) |
|
kfree(screen[lines].cells); |
|
kfree(screen); |
|
out_err: |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
/* |
|
* Free tty3270 screen. |
|
*/ |
|
static void |
|
tty3270_free_screen(struct tty3270_line *screen, unsigned int rows) |
|
{ |
|
int lines; |
|
|
|
for (lines = 0; lines < rows - 2; lines++) |
|
kfree(screen[lines].cells); |
|
kfree(screen); |
|
} |
|
|
|
/* |
|
* Resize tty3270 screen |
|
*/ |
|
static void tty3270_resize_work(struct work_struct *work) |
|
{ |
|
struct tty3270 *tp = container_of(work, struct tty3270, resize_work); |
|
struct tty3270_line *screen, *oscreen; |
|
struct tty_struct *tty; |
|
unsigned int orows; |
|
struct winsize ws; |
|
|
|
screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols); |
|
if (IS_ERR(screen)) |
|
return; |
|
/* Switch to new output size */ |
|
spin_lock_bh(&tp->view.lock); |
|
tty3270_blank_screen(tp); |
|
oscreen = tp->screen; |
|
orows = tp->view.rows; |
|
tp->view.model = tp->n_model; |
|
tp->view.rows = tp->n_rows; |
|
tp->view.cols = tp->n_cols; |
|
tp->screen = screen; |
|
free_string(&tp->freemem, tp->prompt); |
|
free_string(&tp->freemem, tp->status); |
|
tty3270_create_prompt(tp); |
|
tty3270_create_status(tp); |
|
while (tp->nr_lines < tp->view.rows - 2) |
|
tty3270_blank_line(tp); |
|
tp->update_flags = TTY_UPDATE_ALL; |
|
spin_unlock_bh(&tp->view.lock); |
|
tty3270_free_screen(oscreen, orows); |
|
tty3270_set_timer(tp, 1); |
|
/* Informat tty layer about new size */ |
|
tty = tty_port_tty_get(&tp->port); |
|
if (!tty) |
|
return; |
|
ws.ws_row = tp->view.rows - 2; |
|
ws.ws_col = tp->view.cols; |
|
tty_do_resize(tty, &ws); |
|
tty_kref_put(tty); |
|
} |
|
|
|
static void |
|
tty3270_resize(struct raw3270_view *view, int model, int rows, int cols) |
|
{ |
|
struct tty3270 *tp = container_of(view, struct tty3270, view); |
|
|
|
if (tp->n_model == model && tp->n_rows == rows && tp->n_cols == cols) |
|
return; |
|
tp->n_model = model; |
|
tp->n_rows = rows; |
|
tp->n_cols = cols; |
|
schedule_work(&tp->resize_work); |
|
} |
|
|
|
/* |
|
* 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); |
|
|
|
del_timer_sync(&tp->timer); |
|
tty3270_free_screen(tp->screen, tp->view.rows); |
|
tty3270_free_view(tp); |
|
} |
|
|
|
/* |
|
* Delayed freeing of tty3270 views. |
|
*/ |
|
static void |
|
tty3270_del_views(void) |
|
{ |
|
int i; |
|
|
|
for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) { |
|
struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i); |
|
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, |
|
.resize = tty3270_resize |
|
}; |
|
|
|
/* |
|
* 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; |
|
tp->inattr = TF_INPUT; |
|
goto port_install; |
|
} |
|
if (tty3270_max_index < tty->index + 1) |
|
tty3270_max_index = tty->index + 1; |
|
|
|
/* 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, |
|
RAW3270_VIEW_LOCK_BH); |
|
if (rc) { |
|
tty3270_free_view(tp); |
|
return rc; |
|
} |
|
|
|
tp->screen = tty3270_alloc_screen(tp->view.rows, tp->view.cols); |
|
if (IS_ERR(tp->screen)) { |
|
rc = PTR_ERR(tp->screen); |
|
raw3270_put_view(&tp->view); |
|
raw3270_del_view(&tp->view); |
|
tty3270_free_view(tp); |
|
return rc; |
|
} |
|
|
|
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); |
|
|
|
port_install: |
|
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 whenever a 3270 tty is opened. |
|
*/ |
|
static int |
|
tty3270_open(struct tty_struct *tty, struct file *filp) |
|
{ |
|
struct tty3270 *tp = tty->driver_data; |
|
struct tty_port *port = &tp->port; |
|
|
|
port->count++; |
|
tty_port_tty_set(port, tty); |
|
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_port_tty_set(&tp->port, NULL); |
|
} |
|
|
|
static void tty3270_cleanup(struct tty_struct *tty) |
|
{ |
|
struct tty3270 *tp = tty->driver_data; |
|
|
|
if (tp) { |
|
tty->driver_data = NULL; |
|
raw3270_put_view(&tp->view); |
|
} |
|
} |
|
|
|
/* |
|
* We always have room. |
|
*/ |
|
static unsigned 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->flow.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; |
|
} |
|
} |
|
|
|
/* |
|
* 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) |
|
{ |
|
struct tty3270 *tp; |
|
|
|
tp = tty->driver_data; |
|
if (!tp) |
|
return; |
|
spin_lock_bh(&tp->view.lock); |
|
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_blank_screen(tp); |
|
while (tp->nr_lines < tp->view.rows - 2) |
|
tty3270_blank_line(tp); |
|
tp->update_flags = TTY_UPDATE_ALL; |
|
spin_unlock_bh(&tp->view.lock); |
|
tty3270_set_timer(tp, 1); |
|
} |
|
|
|
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_io_error(tty)) |
|
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_io_error(tty)) |
|
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, |
|
.open = tty3270_open, |
|
.close = tty3270_close, |
|
.write = tty3270_write, |
|
.put_char = tty3270_put_char, |
|
.flush_chars = tty3270_flush_chars, |
|
.write_room = tty3270_write_room, |
|
.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 |
|
}; |
|
|
|
static void tty3270_create_cb(int minor) |
|
{ |
|
tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL); |
|
} |
|
|
|
static void tty3270_destroy_cb(int minor) |
|
{ |
|
tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR); |
|
} |
|
|
|
static struct raw3270_notifier tty3270_notifier = |
|
{ |
|
.create = tty3270_create_cb, |
|
.destroy = tty3270_destroy_cb, |
|
}; |
|
|
|
/* |
|
* 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 = tty_alloc_driver(RAW3270_MAXDEVS, |
|
TTY_DRIVER_REAL_RAW | |
|
TTY_DRIVER_DYNAMIC_DEV | |
|
TTY_DRIVER_RESET_TERMIOS); |
|
if (IS_ERR(driver)) |
|
return PTR_ERR(driver); |
|
|
|
/* |
|
* 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 = "tty3270"; |
|
driver->name = "3270/tty"; |
|
driver->major = IBM_TTY3270_MAJOR; |
|
driver->minor_start = RAW3270_FIRSTMINOR; |
|
driver->name_base = RAW3270_FIRSTMINOR; |
|
driver->type = TTY_DRIVER_TYPE_SYSTEM; |
|
driver->subtype = SYSTEM_TYPE_TTY; |
|
driver->init_termios = tty_std_termios; |
|
tty_set_operations(driver, &tty3270_ops); |
|
ret = tty_register_driver(driver); |
|
if (ret) { |
|
tty_driver_kref_put(driver); |
|
return ret; |
|
} |
|
tty3270_driver = driver; |
|
raw3270_register_notifier(&tty3270_notifier); |
|
return 0; |
|
} |
|
|
|
static void __exit |
|
tty3270_exit(void) |
|
{ |
|
struct tty_driver *driver; |
|
|
|
raw3270_unregister_notifier(&tty3270_notifier); |
|
driver = tty3270_driver; |
|
tty3270_driver = NULL; |
|
tty_unregister_driver(driver); |
|
tty_driver_kref_put(driver); |
|
tty3270_del_views(); |
|
} |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); |
|
|
|
module_init(tty3270_init); |
|
module_exit(tty3270_exit);
|
|
|