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380 lines
8.8 KiB
380 lines
8.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) 1999-2001 Vojtech Pavlik |
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*/ |
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/* |
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* Sun keyboard driver for Linux |
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*/ |
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/* |
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*/ |
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#include <linux/delay.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/interrupt.h> |
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#include <linux/input.h> |
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#include <linux/serio.h> |
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#include <linux/workqueue.h> |
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#define DRIVER_DESC "Sun keyboard driver" |
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MODULE_AUTHOR("Vojtech Pavlik <[email protected]>"); |
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MODULE_DESCRIPTION(DRIVER_DESC); |
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MODULE_LICENSE("GPL"); |
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static unsigned char sunkbd_keycode[128] = { |
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0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112, |
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65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106, 1, 2, 3, |
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4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 41, 14,110,113, 98, 55, |
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116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, |
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26, 27,111,127, 71, 72, 73, 74,134,135,107, 0, 29, 30, 31, 32, |
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33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136, |
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104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101, |
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79, 80, 81, 0, 0, 0,138, 58,125, 57,126,109, 86, 78 |
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}; |
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#define SUNKBD_CMD_RESET 0x1 |
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#define SUNKBD_CMD_BELLON 0x2 |
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#define SUNKBD_CMD_BELLOFF 0x3 |
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#define SUNKBD_CMD_CLICK 0xa |
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#define SUNKBD_CMD_NOCLICK 0xb |
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#define SUNKBD_CMD_SETLED 0xe |
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#define SUNKBD_CMD_LAYOUT 0xf |
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#define SUNKBD_RET_RESET 0xff |
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#define SUNKBD_RET_ALLUP 0x7f |
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#define SUNKBD_RET_LAYOUT 0xfe |
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#define SUNKBD_LAYOUT_5_MASK 0x20 |
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#define SUNKBD_RELEASE 0x80 |
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#define SUNKBD_KEY 0x7f |
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/* |
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* Per-keyboard data. |
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*/ |
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struct sunkbd { |
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unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)]; |
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struct input_dev *dev; |
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struct serio *serio; |
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struct work_struct tq; |
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wait_queue_head_t wait; |
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char name[64]; |
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char phys[32]; |
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char type; |
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bool enabled; |
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volatile s8 reset; |
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volatile s8 layout; |
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}; |
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/* |
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* sunkbd_interrupt() is called by the low level driver when a character |
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* is received. |
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*/ |
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static irqreturn_t sunkbd_interrupt(struct serio *serio, |
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unsigned char data, unsigned int flags) |
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{ |
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struct sunkbd *sunkbd = serio_get_drvdata(serio); |
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if (sunkbd->reset <= -1) { |
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/* |
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* If cp[i] is 0xff, sunkbd->reset will stay -1. |
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* The keyboard sends 0xff 0xff 0xID on powerup. |
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*/ |
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sunkbd->reset = data; |
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wake_up_interruptible(&sunkbd->wait); |
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goto out; |
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} |
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if (sunkbd->layout == -1) { |
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sunkbd->layout = data; |
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wake_up_interruptible(&sunkbd->wait); |
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goto out; |
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} |
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switch (data) { |
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case SUNKBD_RET_RESET: |
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if (sunkbd->enabled) |
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schedule_work(&sunkbd->tq); |
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sunkbd->reset = -1; |
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break; |
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case SUNKBD_RET_LAYOUT: |
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sunkbd->layout = -1; |
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break; |
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case SUNKBD_RET_ALLUP: /* All keys released */ |
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break; |
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default: |
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if (!sunkbd->enabled) |
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break; |
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if (sunkbd->keycode[data & SUNKBD_KEY]) { |
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input_report_key(sunkbd->dev, |
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sunkbd->keycode[data & SUNKBD_KEY], |
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!(data & SUNKBD_RELEASE)); |
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input_sync(sunkbd->dev); |
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} else { |
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printk(KERN_WARNING |
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"sunkbd.c: Unknown key (scancode %#x) %s.\n", |
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data & SUNKBD_KEY, |
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data & SUNKBD_RELEASE ? "released" : "pressed"); |
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} |
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} |
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out: |
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return IRQ_HANDLED; |
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} |
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/* |
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* sunkbd_event() handles events from the input module. |
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*/ |
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static int sunkbd_event(struct input_dev *dev, |
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unsigned int type, unsigned int code, int value) |
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{ |
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struct sunkbd *sunkbd = input_get_drvdata(dev); |
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switch (type) { |
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case EV_LED: |
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serio_write(sunkbd->serio, SUNKBD_CMD_SETLED); |
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serio_write(sunkbd->serio, |
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(!!test_bit(LED_CAPSL, dev->led) << 3) | |
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(!!test_bit(LED_SCROLLL, dev->led) << 2) | |
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(!!test_bit(LED_COMPOSE, dev->led) << 1) | |
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!!test_bit(LED_NUML, dev->led)); |
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return 0; |
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case EV_SND: |
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switch (code) { |
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case SND_CLICK: |
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serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value); |
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return 0; |
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case SND_BELL: |
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serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value); |
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return 0; |
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} |
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break; |
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} |
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return -1; |
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} |
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/* |
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* sunkbd_initialize() checks for a Sun keyboard attached, and determines |
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* its type. |
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*/ |
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static int sunkbd_initialize(struct sunkbd *sunkbd) |
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{ |
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sunkbd->reset = -2; |
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serio_write(sunkbd->serio, SUNKBD_CMD_RESET); |
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wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ); |
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if (sunkbd->reset < 0) |
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return -1; |
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sunkbd->type = sunkbd->reset; |
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if (sunkbd->type == 4) { /* Type 4 keyboard */ |
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sunkbd->layout = -2; |
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serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT); |
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wait_event_interruptible_timeout(sunkbd->wait, |
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sunkbd->layout >= 0, HZ / 4); |
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if (sunkbd->layout < 0) |
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return -1; |
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if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK) |
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sunkbd->type = 5; |
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} |
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return 0; |
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} |
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/* |
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* sunkbd_set_leds_beeps() sets leds and beeps to a state the computer remembers |
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* they were in. |
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*/ |
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static void sunkbd_set_leds_beeps(struct sunkbd *sunkbd) |
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{ |
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serio_write(sunkbd->serio, SUNKBD_CMD_SETLED); |
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serio_write(sunkbd->serio, |
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(!!test_bit(LED_CAPSL, sunkbd->dev->led) << 3) | |
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(!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) | |
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(!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) | |
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!!test_bit(LED_NUML, sunkbd->dev->led)); |
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serio_write(sunkbd->serio, |
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SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd)); |
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serio_write(sunkbd->serio, |
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SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd)); |
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} |
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/* |
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* sunkbd_reinit() wait for the keyboard reset to complete and restores state |
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* of leds and beeps. |
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*/ |
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static void sunkbd_reinit(struct work_struct *work) |
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{ |
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struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq); |
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/* |
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* It is OK that we check sunkbd->enabled without pausing serio, |
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* as we only want to catch true->false transition that will |
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* happen once and we will be woken up for it. |
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*/ |
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wait_event_interruptible_timeout(sunkbd->wait, |
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sunkbd->reset >= 0 || !sunkbd->enabled, |
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HZ); |
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if (sunkbd->reset >= 0 && sunkbd->enabled) |
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sunkbd_set_leds_beeps(sunkbd); |
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} |
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static void sunkbd_enable(struct sunkbd *sunkbd, bool enable) |
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{ |
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serio_pause_rx(sunkbd->serio); |
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sunkbd->enabled = enable; |
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serio_continue_rx(sunkbd->serio); |
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if (!enable) { |
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wake_up_interruptible(&sunkbd->wait); |
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cancel_work_sync(&sunkbd->tq); |
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} |
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} |
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/* |
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* sunkbd_connect() probes for a Sun keyboard and fills the necessary |
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* structures. |
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*/ |
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static int sunkbd_connect(struct serio *serio, struct serio_driver *drv) |
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{ |
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struct sunkbd *sunkbd; |
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struct input_dev *input_dev; |
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int err = -ENOMEM; |
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int i; |
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sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL); |
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input_dev = input_allocate_device(); |
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if (!sunkbd || !input_dev) |
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goto fail1; |
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sunkbd->serio = serio; |
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sunkbd->dev = input_dev; |
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init_waitqueue_head(&sunkbd->wait); |
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INIT_WORK(&sunkbd->tq, sunkbd_reinit); |
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snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys); |
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serio_set_drvdata(serio, sunkbd); |
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err = serio_open(serio, drv); |
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if (err) |
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goto fail2; |
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if (sunkbd_initialize(sunkbd) < 0) { |
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err = -ENODEV; |
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goto fail3; |
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} |
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snprintf(sunkbd->name, sizeof(sunkbd->name), |
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"Sun Type %d keyboard", sunkbd->type); |
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memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode)); |
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input_dev->name = sunkbd->name; |
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input_dev->phys = sunkbd->phys; |
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input_dev->id.bustype = BUS_RS232; |
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input_dev->id.vendor = SERIO_SUNKBD; |
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input_dev->id.product = sunkbd->type; |
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input_dev->id.version = 0x0100; |
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input_dev->dev.parent = &serio->dev; |
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input_set_drvdata(input_dev, sunkbd); |
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input_dev->event = sunkbd_event; |
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) | |
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BIT_MASK(EV_SND) | BIT_MASK(EV_REP); |
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input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) | |
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BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML); |
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input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL); |
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input_dev->keycode = sunkbd->keycode; |
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input_dev->keycodesize = sizeof(unsigned char); |
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input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode); |
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for (i = 0; i < ARRAY_SIZE(sunkbd_keycode); i++) |
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__set_bit(sunkbd->keycode[i], input_dev->keybit); |
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__clear_bit(KEY_RESERVED, input_dev->keybit); |
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sunkbd_enable(sunkbd, true); |
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err = input_register_device(sunkbd->dev); |
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if (err) |
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goto fail4; |
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return 0; |
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fail4: sunkbd_enable(sunkbd, false); |
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fail3: serio_close(serio); |
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fail2: serio_set_drvdata(serio, NULL); |
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fail1: input_free_device(input_dev); |
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kfree(sunkbd); |
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return err; |
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} |
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/* |
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* sunkbd_disconnect() unregisters and closes behind us. |
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*/ |
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static void sunkbd_disconnect(struct serio *serio) |
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{ |
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struct sunkbd *sunkbd = serio_get_drvdata(serio); |
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sunkbd_enable(sunkbd, false); |
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input_unregister_device(sunkbd->dev); |
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serio_close(serio); |
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serio_set_drvdata(serio, NULL); |
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kfree(sunkbd); |
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} |
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static const struct serio_device_id sunkbd_serio_ids[] = { |
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{ |
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.type = SERIO_RS232, |
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.proto = SERIO_SUNKBD, |
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.id = SERIO_ANY, |
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.extra = SERIO_ANY, |
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}, |
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{ |
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.type = SERIO_RS232, |
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.proto = SERIO_UNKNOWN, /* sunkbd does probe */ |
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.id = SERIO_ANY, |
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.extra = SERIO_ANY, |
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}, |
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{ 0 } |
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}; |
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MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids); |
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static struct serio_driver sunkbd_drv = { |
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.driver = { |
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.name = "sunkbd", |
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}, |
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.description = DRIVER_DESC, |
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.id_table = sunkbd_serio_ids, |
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.interrupt = sunkbd_interrupt, |
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.connect = sunkbd_connect, |
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.disconnect = sunkbd_disconnect, |
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}; |
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module_serio_driver(sunkbd_drv);
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