Lines Matching +full:read +full:- +full:strobe +full:- +full:delay
1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
5 * Copyright (C) 2016-2017 Glider bvba
10 * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
15 * data output pins or to the ground. The combinations have to be hard-coded
22 * - the initialization/deinitialization process is very dirty and should
26 * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
27 * - make the LCD a part of a virtual screen of Vx*Vy
28 * - make the inputs list smp-safe
29 * - change the keyboard to a double mapping : signals -> key_id -> values
49 #include <linux/delay.h>
81 #define PNL_PBIDIR 0x20 /* bi-directional ports */
82 /* high to read data in or-ed with data out */
113 #define NOT_SET -1
116 #define r_ctr(x) (parport_read_control((x)->port))
117 #define r_dtr(x) (parport_read_data((x)->port))
118 #define r_str(x) (parport_read_status((x)->port))
119 #define w_ctr(x, y) (parport_write_control((x)->port, (y)))
120 #define w_dtr(x, y) (parport_write_data((x)->port, (y)))
170 * Within each group, bits are stored in the same order as read on the port :
174 * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
177 /* what has just been read from the I/O ports */
199 /* lcd-specific variables */
397 /* Device single-open policy control */
427 "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
457 * (negative) if the signal is negated. -MAXINT is used to indicate that the
466 "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)");
471 "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)");
476 "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)");
481 "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)");
486 "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)");
491 "# of the // port pin connected to LCD backlight, with polarity (-17..17)");
493 /* Deprecated module parameters - consider not using them anymore */
565 {"a-p-e-", "Down\n", "Down\n", ""},
566 {"a-p-E-", "Ret\n", "Ret\n", ""},
567 {"a-P-E-", "Esc\n", "Esc\n", ""},
568 {"a-P-e-", "Up\n", "Up\n", ""},
618 * Converts a parallel port pin (from -25 to 25) to data and control ports
620 * unconnected if it's on pin 0 or an invalid pin (<-25 or >25).
642 pin = -pin; in pin_to_bits()
648 case PIN_STROBE: /* strobe, inverted */ in pin_to_bits()
652 case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ in pin_to_bits()
653 d_bit = 1 << (pin - 2); in pin_to_bits()
688 * the data bit is set on D0, and the clock on STROBE. in lcd_send_serial()
689 * LCD reads D0 on STROBE's rising edge. in lcd_send_serial()
704 udelay(1); /* maintain the strobe during 1 us */ in lcd_send_serial()
753 udelay(20); /* maintain the data during 20 us before the strobe */ in lcd_write_cmd_p8()
760 udelay(40); /* maintain the strobe during 40 us */ in lcd_write_cmd_p8()
775 udelay(20); /* maintain the data during 20 us before the strobe */ in lcd_write_data_p8()
782 udelay(40); /* maintain the strobe during 40 us */ in lcd_write_data_p8()
838 hdc = charlcd->drvdata; in lcd_init()
839 hdc->hd44780 = &lcd; in lcd_init()
842 * Init lcd struct with load-time values to preserve exact in lcd_init()
845 charlcd->height = lcd_height; in lcd_init()
846 charlcd->width = lcd_width; in lcd_init()
847 hdc->bwidth = lcd_bwidth; in lcd_init()
848 hdc->hwidth = lcd_hwidth; in lcd_init()
858 charlcd->width = 40; in lcd_init()
859 hdc->bwidth = 40; in lcd_init()
860 hdc->hwidth = 64; in lcd_init()
861 charlcd->height = 2; in lcd_init()
871 charlcd->width = 16; in lcd_init()
872 hdc->bwidth = 40; in lcd_init()
873 hdc->hwidth = 16; in lcd_init()
874 charlcd->height = 2; in lcd_init()
884 charlcd->width = 16; in lcd_init()
885 hdc->bwidth = 40; in lcd_init()
886 hdc->hwidth = 64; in lcd_init()
887 charlcd->height = 2; in lcd_init()
890 /* customer-defined */ in lcd_init()
896 /* parallel mode, 8 bits, hantronix-like */ in lcd_init()
903 charlcd->width = 16; in lcd_init()
904 hdc->bwidth = 40; in lcd_init()
905 hdc->hwidth = 64; in lcd_init()
906 charlcd->height = 2; in lcd_init()
912 charlcd->height = lcd_height; in lcd_init()
914 charlcd->width = lcd_width; in lcd_init()
916 hdc->bwidth = lcd_bwidth; in lcd_init()
918 hdc->hwidth = lcd_hwidth; in lcd_init()
937 if (charlcd->width <= 0) in lcd_init()
938 charlcd->width = DEFAULT_LCD_WIDTH; in lcd_init()
939 if (hdc->bwidth <= 0) in lcd_init()
940 hdc->bwidth = DEFAULT_LCD_BWIDTH; in lcd_init()
941 if (hdc->hwidth <= 0) in lcd_init()
942 hdc->hwidth = DEFAULT_LCD_HWIDTH; in lcd_init()
943 if (charlcd->height <= 0) in lcd_init()
944 charlcd->height = DEFAULT_LCD_HEIGHT; in lcd_init()
947 charlcd->ops = &charlcd_ops; in lcd_init()
948 hdc->write_data = lcd_write_data_s; in lcd_init()
949 hdc->write_cmd = lcd_write_cmd_s; in lcd_init()
957 charlcd->ops = &charlcd_ops; in lcd_init()
958 hdc->write_data = lcd_write_data_p8; in lcd_init()
959 hdc->write_cmd = lcd_write_cmd_p8; in lcd_init()
968 charlcd->ops = &charlcd_ops; in lcd_init()
969 hdc->write_data = lcd_write_data_tilcd; in lcd_init()
970 hdc->write_cmd = lcd_write_cmd_tilcd; in lcd_init()
993 charlcd->char_conv = lcd_char_conv_ks0074; in lcd_init()
995 charlcd->char_conv = NULL; in lcd_init()
1025 if (file->f_flags & O_NONBLOCK) in keypad_read()
1026 return -EAGAIN; in keypad_read()
1030 return -EINTR; in keypad_read()
1033 for (; count-- > 0 && (keypad_buflen > 0); in keypad_read()
1034 ++i, ++tmp, --keypad_buflen) { in keypad_read()
1040 return tmp - buf; in keypad_read()
1047 ret = -EBUSY; in keypad_open()
1051 ret = -EPERM; in keypad_open()
1052 if (file->f_mode & FMODE_WRITE) /* device is read-only */ in keypad_open()
1069 .read = keypad_read, /* read */
1085 while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { in keypad_send_key()
1131 /* grounded inputs are signals 40-44 */ in phys_scan_contacts()
1165 * transitions from single-key to multiple-key, but in input_state_high()
1178 * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. in input_state_high()
1180 if (((phys_prev & input->mask) == input->value) && in input_state_high()
1181 ((phys_curr & input->mask) > input->value)) { in input_state_high()
1182 input->state = INPUT_ST_LOW; /* invalidate */ in input_state_high()
1187 if ((phys_curr & input->mask) == input->value) { in input_state_high()
1188 if ((input->type == INPUT_TYPE_STD) && in input_state_high()
1189 (input->high_timer == 0)) { in input_state_high()
1190 input->high_timer++; in input_state_high()
1191 if (input->u.std.press_fct) in input_state_high()
1192 input->u.std.press_fct(input->u.std.press_data); in input_state_high()
1193 } else if (input->type == INPUT_TYPE_KBD) { in input_state_high()
1197 if (input->high_timer == 0) { in input_state_high()
1198 char *press_str = input->u.kbd.press_str; in input_state_high()
1201 int s = sizeof(input->u.kbd.press_str); in input_state_high()
1207 if (input->u.kbd.repeat_str[0]) { in input_state_high()
1208 char *repeat_str = input->u.kbd.repeat_str; in input_state_high()
1210 if (input->high_timer >= KEYPAD_REP_START) { in input_state_high()
1211 int s = sizeof(input->u.kbd.repeat_str); in input_state_high()
1213 input->high_timer -= KEYPAD_REP_DELAY; in input_state_high()
1220 if (input->high_timer < 255) in input_state_high()
1221 input->high_timer++; in input_state_high()
1227 input->state = INPUT_ST_FALLING; in input_state_high()
1228 input->fall_timer = 0; in input_state_high()
1237 if (((phys_prev & input->mask) == input->value) && in input_state_falling()
1238 ((phys_curr & input->mask) > input->value)) { in input_state_falling()
1239 input->state = INPUT_ST_LOW; /* invalidate */ in input_state_falling()
1244 if ((phys_curr & input->mask) == input->value) { in input_state_falling()
1245 if (input->type == INPUT_TYPE_KBD) { in input_state_falling()
1249 if (input->u.kbd.repeat_str[0]) { in input_state_falling()
1250 char *repeat_str = input->u.kbd.repeat_str; in input_state_falling()
1252 if (input->high_timer >= KEYPAD_REP_START) { in input_state_falling()
1253 int s = sizeof(input->u.kbd.repeat_str); in input_state_falling()
1255 input->high_timer -= KEYPAD_REP_DELAY; in input_state_falling()
1262 if (input->high_timer < 255) in input_state_falling()
1263 input->high_timer++; in input_state_falling()
1265 input->state = INPUT_ST_HIGH; in input_state_falling()
1266 } else if (input->fall_timer >= input->fall_time) { in input_state_falling()
1268 if (input->type == INPUT_TYPE_STD) { in input_state_falling()
1269 void (*release_fct)(int) = input->u.std.release_fct; in input_state_falling()
1272 release_fct(input->u.std.release_data); in input_state_falling()
1273 } else if (input->type == INPUT_TYPE_KBD) { in input_state_falling()
1274 char *release_str = input->u.kbd.release_str; in input_state_falling()
1277 int s = sizeof(input->u.kbd.release_str); in input_state_falling()
1283 input->state = INPUT_ST_LOW; in input_state_falling()
1285 input->fall_timer++; in input_state_falling()
1297 switch (input->state) { in panel_process_inputs()
1299 if ((phys_curr & input->mask) != input->value) in panel_process_inputs()
1305 * eg: AB -(release B)-> A -(release A)-> 0 : in panel_process_inputs()
1308 if ((phys_prev & input->mask) == input->value) in panel_process_inputs()
1310 input->rise_timer = 0; in panel_process_inputs()
1311 input->state = INPUT_ST_RISING; in panel_process_inputs()
1314 if ((phys_curr & input->mask) != input->value) { in panel_process_inputs()
1315 input->state = INPUT_ST_LOW; in panel_process_inputs()
1318 if (input->rise_timer < input->rise_time) { in panel_process_inputs()
1320 input->rise_timer++; in panel_process_inputs()
1323 input->high_timer = 0; in panel_process_inputs()
1324 input->state = INPUT_ST_HIGH; in panel_process_inputs()
1366 /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits.
1367 * if <omask> or <imask> are non-null, they will be or'ed with the bits
1390 in = idx - sigtab; in input_name2mask()
1397 out = *name - '0'; in input_name2mask()
1399 } else if (*name == '-') { in input_name2mask()
1435 if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, in panel_bind_key()
1441 key->type = INPUT_TYPE_KBD; in panel_bind_key()
1442 key->state = INPUT_ST_LOW; in panel_bind_key()
1443 key->rise_time = 1; in panel_bind_key()
1444 key->fall_time = 1; in panel_bind_key()
1446 strtomem_pad(key->u.kbd.press_str, press, '\0'); in panel_bind_key()
1447 strtomem_pad(key->u.kbd.repeat_str, repeat, '\0'); in panel_bind_key()
1448 strtomem_pad(key->u.kbd.release_str, release, '\0'); in panel_bind_key()
1449 list_add(&key->list, &logical_inputs); in panel_bind_key()
1473 if (!input_name2mask(name, &callback->mask, &callback->value,
1477 callback->type = INPUT_TYPE_STD;
1478 callback->state = INPUT_ST_LOW;
1479 callback->rise_time = 1;
1480 callback->fall_time = 1;
1481 callback->u.std.press_fct = press_fct;
1482 callback->u.std.press_data = press_data;
1483 callback->u.std.release_fct = release_fct;
1484 callback->u.std.release_data = release_data;
1485 list_add(&callback->list, &logical_inputs);
1543 /* 8 bits, 2*16 hantronix-like, no keypad */ in panel_attach()
1579 * Init lcd struct with load-time values to preserve exact in panel_attach()
1613 if (port->number != parport) in panel_attach()
1617 pr_err("%s: port->number=%d parport=%d, already registered!\n", in panel_attach()
1618 __func__, port->number, parport); in panel_attach()
1628 pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n", in panel_attach()
1629 __func__, port->number, parport); in panel_attach()
1669 if (port->number != parport) in panel_detach()
1673 pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n", in panel_detach()
1674 __func__, port->number, parport); in panel_detach()