/* * drivers/s390/char/tty3270.c * IBM/3270 Driver - tty functions. * * Author(s): * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation */ #include <linux/module.h> #include <linux/types.h> #include <linux/kdev_t.h> #include <linux/tty.h> #include <linux/vt_kern.h> #include <linux/init.h> #include <linux/console.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/bootmem.h> #include <asm/ccwdev.h> #include <asm/cio.h> #include <asm/ebcdic.h> #include <asm/uaccess.h> #include "raw3270.h" #include "tty3270.h" #include "keyboard.h" #define TTY3270_CHAR_BUF_SIZE 256 #define TTY3270_OUTPUT_BUFFER_SIZE 1024 #define TTY3270_STRING_PAGES 5 struct tty_driver *tty3270_driver; static int tty3270_max_index; static struct raw3270_fn tty3270_fn; struct tty3270_cell { unsigned char character; unsigned char highlight; unsigned char f_color; }; struct tty3270_line { struct tty3270_cell *cells; int len; }; #define ESCAPE_NPAR 8 /* * The main tty view data structure. * FIXME: * 1) describe line orientation & lines list concept against screen * 2) describe conversion of screen to lines * 3) describe line format. */ struct tty3270 { struct raw3270_view view; struct tty_struct *tty; /* Pointer to tty structure */ void **freemem_pages; /* Array of pages used for freemem. */ struct list_head freemem; /* List of free memory for strings. */ /* Output stuff. */ struct list_head lines; /* List of lines. */ struct list_head update; /* List of lines to update. */ unsigned char wcc; /* Write control character. */ int nr_lines; /* # lines in list. */ int nr_up; /* # lines up in history. */ unsigned long update_flags; /* Update indication bits. */ struct string *status; /* Lower right of display. */ struct raw3270_request *write; /* Single write request. */ struct timer_list timer; /* Output delay timer. */ /* Current tty screen. */ unsigned int cx, cy; /* Current output position. */ unsigned int highlight; /* Blink/reverse/underscore */ unsigned int f_color; /* Foreground color */ struct tty3270_line *screen; /* Input stuff. */ struct string *prompt; /* Output string for input area. */ struct string *input; /* Input string for read request. */ struct raw3270_request *read; /* Single read request. */ struct raw3270_request *kreset; /* Single keyboard reset request. */ unsigned char inattr; /* Visible/invisible input. */ int throttle, attn; /* tty throttle/unthrottle. */ struct tasklet_struct readlet; /* Tasklet to issue read request. */ struct kbd_data *kbd; /* key_maps stuff. */ /* Escape sequence parsing. */ int esc_state, esc_ques, esc_npar; int esc_par[ESCAPE_NPAR]; unsigned int saved_cx, saved_cy; unsigned int saved_highlight, saved_f_color; /* Command recalling. */ struct list_head rcl_lines; /* List of recallable lines. */ struct list_head *rcl_walk; /* Point in rcl_lines list. */ int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ /* Character array for put_char/flush_chars. */ unsigned int char_count; char char_buf[TTY3270_CHAR_BUF_SIZE]; }; /* tty3270->update_flags. See tty3270_update for details. */ #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ #define TTY_UPDATE_INPUT 4 /* Update input line. */ #define TTY_UPDATE_STATUS 8 /* Update status line. */ #define TTY_UPDATE_ALL 15 static void tty3270_update(struct tty3270 *); /* * Setup timeout for a device. On timeout trigger an update. */ static void tty3270_set_timer(struct tty3270 *tp, int expires) { if (expires == 0) { if (timer_pending(&tp->timer) && del_timer(&tp->timer)) raw3270_put_view(&tp->view); return; } if (timer_pending(&tp->timer) && mod_timer(&tp->timer, jiffies + expires)) return; raw3270_get_view(&tp->view); tp->timer.function = (void (*)(unsigned long)) tty3270_update; tp->timer.data = (unsigned long) tp; tp->timer.expires = jiffies + expires; add_timer(&tp->timer); } /* * The input line are the two last lines of the screen. */ static void tty3270_update_prompt(struct tty3270 *tp, char *input, int count) { struct string *line; unsigned int off; line = tp->prompt; if (count != 0) line->string[5] = TF_INMDT; else line->string[5] = tp->inattr; if (count > tp->view.cols * 2 - 11) count = tp->view.cols * 2 - 11; memcpy(line->string + 6, input, count); line->string[6 + count] = TO_IC; /* Clear to end of input line. */ if (count < tp->view.cols * 2 - 11) { line->string[7 + count] = TO_RA; line->string[10 + count] = 0; off = tp->view.cols * tp->view.rows - 9; raw3270_buffer_address(tp->view.dev, line->string+count+8, off); line->len = 11 + count; } else line->len = 7 + count; tp->update_flags |= TTY_UPDATE_INPUT; } static void tty3270_create_prompt(struct tty3270 *tp) { static const unsigned char blueprint[] = { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, /* empty input string */ TO_IC, TO_RA, 0, 0, 0 }; struct string *line; unsigned int offset; line = alloc_string(&tp->freemem, sizeof(blueprint) + tp->view.cols * 2 - 9); tp->prompt = line; tp->inattr = TF_INPUT; /* Copy blueprint to status line */ memcpy(line->string, blueprint, sizeof(blueprint)); line->len = sizeof(blueprint); /* Set output offsets. */ offset = tp->view.cols * (tp->view.rows - 2); raw3270_buffer_address(tp->view.dev, line->string + 1, offset); offset = tp->view.cols * tp->view.rows - 9; raw3270_buffer_address(tp->view.dev, line->string + 8, offset); /* Allocate input string for reading. */ tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); } /* * The status line is the last line of the screen. It shows the string * "Running"/"Holding" in the lower right corner of the screen. */ static void tty3270_update_status(struct tty3270 * tp) { char *str; str = (tp->nr_up != 0) ? "History" : "Running"; memcpy(tp->status->string + 8, str, 7); codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); tp->update_flags |= TTY_UPDATE_STATUS; } static void tty3270_create_status(struct tty3270 * tp) { static const unsigned char blueprint[] = { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_RESET }; struct string *line; unsigned int offset; line = alloc_string(&tp->freemem,sizeof(blueprint)); tp->status = line; /* Copy blueprint to status line */ memcpy(line->string, blueprint, sizeof(blueprint)); /* Set address to start of status string (= last 9 characters). */ offset = tp->view.cols * tp->view.rows - 9; raw3270_buffer_address(tp->view.dev, line->string + 1, offset); } /* * Set output offsets to 3270 datastream fragment of a tty string. * (TO_SBA offset at the start and TO_RA offset at the end of the string) */ static void tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) { unsigned char *cp; raw3270_buffer_address(tp->view.dev, line->string + 1, tp->view.cols * nr); cp = line->string + line->len - 4; if (*cp == TO_RA) raw3270_buffer_address(tp->view.dev, cp + 1, tp->view.cols * (nr + 1)); } /* * Rebuild update list to print all lines. */ static void tty3270_rebuild_update(struct tty3270 *tp) { struct string *s, *n; int line, nr_up; /* * Throw away update list and create a new one, * containing all lines that will fit on the screen. */ list_for_each_entry_safe(s, n, &tp->update, update) list_del_init(&s->update); line = tp->view.rows - 3; nr_up = tp->nr_up; list_for_each_entry_reverse(s, &tp->lines, list) { if (nr_up > 0) { nr_up--; continue; } tty3270_update_string(tp, s, line); list_add(&s->update, &tp->update); if (--line < 0) break; } tp->update_flags |= TTY_UPDATE_LIST; } /* * Alloc string for size bytes. If there is not enough room in * freemem, free strings until there is room. */ static struct string * tty3270_alloc_string(struct tty3270 *tp, size_t size) { struct string *s, *n; s = alloc_string(&tp->freemem, size); if (s) return s; list_for_each_entry_safe(s, n, &tp->lines, list) { BUG_ON(tp->nr_lines <= tp->view.rows - 2); list_del(&s->list); if (!list_empty(&s->update)) list_del(&s->update); tp->nr_lines--; if (free_string(&tp->freemem, s) >= size) break; } s = alloc_string(&tp->freemem, size); BUG_ON(!s); if (tp->nr_up != 0 && tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { tp->nr_up = tp->nr_lines - tp->view.rows + 2; tty3270_rebuild_update(tp); tty3270_update_status(tp); } return s; } /* * Add an empty line to the list. */ static void tty3270_blank_line(struct tty3270 *tp) { static const unsigned char blueprint[] = { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; struct string *s; s = tty3270_alloc_string(tp, sizeof(blueprint)); memcpy(s->string, blueprint, sizeof(blueprint)); s->len = sizeof(blueprint); list_add_tail(&s->list, &tp->lines); tp->nr_lines++; if (tp->nr_up != 0) tp->nr_up++; } /* * Write request completion callback. */ static void tty3270_write_callback(struct raw3270_request *rq, void *data) { struct tty3270 *tp; tp = (struct tty3270 *) rq->view; if (rq->rc != 0) { /* Write wasn't successfull. Refresh all. */ tty3270_rebuild_update(tp); tp->update_flags = TTY_UPDATE_ALL; tty3270_set_timer(tp, 1); } raw3270_request_reset(rq); xchg(&tp->write, rq); } /* * Update 3270 display. */ static void tty3270_update(struct tty3270 *tp) { static char invalid_sba[2] = { 0xff, 0xff }; struct raw3270_request *wrq; unsigned long updated; struct string *s, *n; char *sba, *str; int rc, len; wrq = xchg(&tp->write, 0); if (!wrq) { tty3270_set_timer(tp, 1); return; } spin_lock(&tp->view.lock); updated = 0; if (tp->update_flags & TTY_UPDATE_ERASE) { /* Use erase write alternate to erase display. */ raw3270_request_set_cmd(wrq, TC_EWRITEA); updated |= TTY_UPDATE_ERASE; } else raw3270_request_set_cmd(wrq, TC_WRITE); raw3270_request_add_data(wrq, &tp->wcc, 1); tp->wcc = TW_NONE; /* * Update status line. */ if (tp->update_flags & TTY_UPDATE_STATUS) if (raw3270_request_add_data(wrq, tp->status->string, tp->status->len) == 0) updated |= TTY_UPDATE_STATUS; /* * Write input line. */ if (tp->update_flags & TTY_UPDATE_INPUT) if (raw3270_request_add_data(wrq, tp->prompt->string, tp->prompt->len) == 0) updated |= TTY_UPDATE_INPUT; sba = invalid_sba; if (tp->update_flags & TTY_UPDATE_LIST) { /* Write strings in the update list to the screen. */ list_for_each_entry_safe(s, n, &tp->update, update) { str = s->string; len = s->len; /* * Skip TO_SBA at the start of the string if the * last output position matches the start address * of this line. */ if (s->string[1] == sba[0] && s->string[2] == sba[1]) str += 3, len -= 3; if (raw3270_request_add_data(wrq, str, len) != 0) break; list_del_init(&s->update); sba = s->string + s->len - 3; } if (list_empty(&tp->update)) updated |= TTY_UPDATE_LIST; } wrq->callback = tty3270_write_callback; rc = raw3270_start(&tp->view, wrq); if (rc == 0) { tp->update_flags &= ~updated; if (tp->update_flags) tty3270_set_timer(tp, 1); } else { raw3270_request_reset(wrq); xchg(&tp->write, wrq); } spin_unlock(&tp->view.lock); raw3270_put_view(&tp->view); } /* * Command recalling. */ static void tty3270_rcl_add(struct tty3270 *tp, char *input, int len) { struct string *s; tp->rcl_walk = NULL; if (len <= 0) return; if (tp->rcl_nr >= tp->rcl_max) { s = list_entry(tp->rcl_lines.next, struct string, list); list_del(&s->list); free_string(&tp->freemem, s); tp->rcl_nr--; } s = tty3270_alloc_string(tp, len); memcpy(s->string, input, len); list_add_tail(&s->list, &tp->rcl_lines); tp->rcl_nr++; } static void tty3270_rcl_backward(struct kbd_data *kbd) { struct tty3270 *tp; struct string *s; tp = kbd->tty->driver_data; spin_lock_bh(&tp->view.lock); if (tp->inattr == TF_INPUT) { if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) tp->rcl_walk = tp->rcl_walk->prev; else if (!list_empty(&tp->rcl_lines)) tp->rcl_walk = tp->rcl_lines.prev; s = tp->rcl_walk ? list_entry(tp->rcl_walk, struct string, list) : NULL; if (tp->rcl_walk) { s = list_entry(tp->rcl_walk, struct string, list); tty3270_update_prompt(tp, s->string, s->len); } else tty3270_update_prompt(tp, NULL, 0); tty3270_set_timer(tp, 1); } spin_unlock_bh(&tp->view.lock); } /* * Deactivate tty view. */ static void tty3270_exit_tty(struct kbd_data *kbd) { struct tty3270 *tp; tp = kbd->tty->driver_data; raw3270_deactivate_view(&tp->view); } /* * Scroll forward in history. */ static void tty3270_scroll_forward(struct kbd_data *kbd) { struct tty3270 *tp; int nr_up; tp = kbd->tty->driver_data; 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; int nr_up; tp = kbd->tty->driver_data; 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; char *input; int len; tp = (struct tty3270 *) rrq->view; 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. */ tty3270_rebuild_update(tp); 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); /* Emit input string. */ if (tp->tty) { 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) { raw3270_get_view(rq->view); /* Schedule tasklet to pass input to tty. */ tasklet_schedule(&((struct tty3270 *) rq->view)->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; unsigned long flags; tp = (struct tty3270 *) view; spin_lock_irqsave(&tp->view.lock, flags); tp->nr_up = 0; tty3270_rebuild_update(tp); tty3270_update_status(tp); tp->update_flags = TTY_UPDATE_ALL; tty3270_set_timer(tp, 1); spin_unlock_irqrestore(&tp->view.lock, flags); return 0; } static void tty3270_deactivate(struct raw3270_view *view) { } 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); 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; 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; struct tty_struct *tty; tp = (struct tty3270 *) view; tty = tp->tty; if (tty) { tty->driver_data = NULL; tp->tty = tp->kbd->tty = NULL; tty_hangup(tty); raw3270_put_view(&tp->view); } } /* * Free tty3270 data structure */ static void tty3270_free(struct raw3270_view *view) { tty3270_free_screen((struct tty3270 *) view); tty3270_free_view((struct tty3270 *) view); } /* * Delayed freeing of tty3270 views. */ static void tty3270_del_views(void) { struct tty3270 *tp; int i; for (i = 0; i < tty3270_max_index; i++) { tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR); if (!IS_ERR(tp)) raw3270_del_view(&tp->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. */ static int tty3270_open(struct tty_struct *tty, struct file * filp) { struct tty3270 *tp; int i, rc; if (tty->count > 1) return 0; /* Check if the tty3270 is already there. */ tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR); if (!IS_ERR(tp)) { tty->driver_data = tp; tty->winsize.ws_row = tp->view.rows - 2; tty->winsize.ws_col = tp->view.cols; tty->low_latency = 0; tp->tty = tty; tp->kbd->tty = tty; tp->inattr = TF_INPUT; return 0; } 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(tp) == -ENODEV) return -ENODEV; /* Allocate tty3270 structure on first open. */ tp = tty3270_alloc_view(); if (IS_ERR(tp)) return PTR_ERR(tp); INIT_LIST_HEAD(&tp->lines); INIT_LIST_HEAD(&tp->update); INIT_LIST_HEAD(&tp->rcl_lines); tp->rcl_max = 20; init_timer(&tp->timer); tasklet_init(&tp->readlet, (void (*)(unsigned long)) tty3270_read_tasklet, (unsigned long) tp->read); 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; } tp->tty = tty; tty->low_latency = 0; tty->driver_data = tp; 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->tty = tty; 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); 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; if (tty->count > 1) return; tp = (struct tty3270 *) tty->driver_data; if (tp) { tty->driver_data = NULL; tp->tty = tp->kbd->tty = NULL; 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->tty, "\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->tty, "\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->tty, 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, const unsigned char *buf, int count) { int i_msg, i; spin_lock_bh(&tp->view.lock); for (i_msg = 0; !tp->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, tp->char_buf, tp->char_count); tp->char_count = 0; } tty3270_do_write(tp, 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, 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, struct file *file, 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, file, cmd, arg); } static const struct tty_operations tty3270_ops = { .open = tty3270_open, .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, .set_termios = tty3270_set_termios }; static void tty3270_notifier(int index, int active) { if (active) tty_register_device(tty3270_driver, index, NULL); else tty_unregister_device(tty3270_driver, index); } /* * 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->owner = THIS_MODULE; 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_DRIVER_DYNAMIC_DEV; tty_set_operations(driver, &tty3270_ops); ret = tty_register_driver(driver); if (ret) { put_tty_driver(driver); return ret; } tty3270_driver = driver; ret = raw3270_register_notifier(tty3270_notifier); if (ret) { put_tty_driver(driver); return ret; } 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); tty3270_del_views(); } MODULE_LICENSE("GPL"); MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); module_init(tty3270_init); module_exit(tty3270_exit);