1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/input/keyboard/jornada720_kbd.c 4 * 5 * HP Jornada 720 keyboard platform driver 6 * 7 * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com> 8 * 9 * Copyright (C) 2006 jornada 720 kbd driver by 10 Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX 11 * based on (C) 2004 jornada 720 kbd driver by 12 Alex Lange <chicken@handhelds.org> 13 */ 14 #include <linux/device.h> 15 #include <linux/errno.h> 16 #include <linux/interrupt.h> 17 #include <linux/input.h> 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/slab.h> 22 23 #include <mach/jornada720.h> 24 25 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>"); 26 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver"); 27 MODULE_LICENSE("GPL v2"); 28 29 static unsigned short jornada_std_keymap[128] = { /* ROW */ 30 0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, /* #1 */ 31 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, /* -> */ 32 0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, /* #2 */ 33 KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0, /* -> */ 34 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O, /* #3 */ 35 KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0, /* -> */ 36 0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L, /* #4 */ 37 KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0, /* -> */ 38 0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA, /* #5 */ 39 KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0, /* -> */ 40 0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0, /* #6 */ 41 KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE, /* -> */ 42 0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK, /* -> */ 43 KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0, /* -> */ 44 0, 0, 0, KEY_POWER, /* -> */ 45 }; 46 47 struct jornadakbd { 48 unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)]; 49 struct input_dev *input; 50 }; 51 52 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id) 53 { 54 struct platform_device *pdev = dev_id; 55 struct jornadakbd *jornadakbd = platform_get_drvdata(pdev); 56 struct input_dev *input = jornadakbd->input; 57 u8 count, kbd_data, scan_code; 58 59 /* startup ssp with spinlock */ 60 jornada_ssp_start(); 61 62 if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) { 63 dev_dbg(&pdev->dev, 64 "GetKeycode command failed with ETIMEDOUT, flushed bus\n"); 65 } else { 66 /* How many keycodes are waiting for us? */ 67 count = jornada_ssp_byte(TXDUMMY); 68 69 /* Lets drag them out one at a time */ 70 while (count--) { 71 /* Exchange TxDummy for location (keymap[kbddata]) */ 72 kbd_data = jornada_ssp_byte(TXDUMMY); 73 scan_code = kbd_data & 0x7f; 74 75 input_event(input, EV_MSC, MSC_SCAN, scan_code); 76 input_report_key(input, jornadakbd->keymap[scan_code], 77 !(kbd_data & 0x80)); 78 input_sync(input); 79 } 80 } 81 82 /* release spinlock and turn off ssp */ 83 jornada_ssp_end(); 84 85 return IRQ_HANDLED; 86 }; 87 88 static int jornada720_kbd_probe(struct platform_device *pdev) 89 { 90 struct jornadakbd *jornadakbd; 91 struct input_dev *input_dev; 92 int i, err, irq; 93 94 irq = platform_get_irq(pdev, 0); 95 if (irq <= 0) 96 return irq < 0 ? irq : -EINVAL; 97 98 jornadakbd = devm_kzalloc(&pdev->dev, sizeof(*jornadakbd), GFP_KERNEL); 99 input_dev = devm_input_allocate_device(&pdev->dev); 100 if (!jornadakbd || !input_dev) 101 return -ENOMEM; 102 103 platform_set_drvdata(pdev, jornadakbd); 104 105 memcpy(jornadakbd->keymap, jornada_std_keymap, 106 sizeof(jornada_std_keymap)); 107 jornadakbd->input = input_dev; 108 109 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); 110 input_dev->name = "HP Jornada 720 keyboard"; 111 input_dev->phys = "jornadakbd/input0"; 112 input_dev->keycode = jornadakbd->keymap; 113 input_dev->keycodesize = sizeof(unsigned short); 114 input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap); 115 input_dev->id.bustype = BUS_HOST; 116 input_dev->dev.parent = &pdev->dev; 117 118 for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++) 119 __set_bit(jornadakbd->keymap[i], input_dev->keybit); 120 __clear_bit(KEY_RESERVED, input_dev->keybit); 121 122 input_set_capability(input_dev, EV_MSC, MSC_SCAN); 123 124 err = devm_request_irq(&pdev->dev, irq, jornada720_kbd_interrupt, 125 IRQF_TRIGGER_FALLING, "jornadakbd", pdev); 126 if (err) { 127 dev_err(&pdev->dev, "unable to grab IRQ%d: %d\n", irq, err); 128 return err; 129 } 130 131 return input_register_device(jornadakbd->input); 132 }; 133 134 /* work with hotplug and coldplug */ 135 MODULE_ALIAS("platform:jornada720_kbd"); 136 137 static struct platform_driver jornada720_kbd_driver = { 138 .driver = { 139 .name = "jornada720_kbd", 140 }, 141 .probe = jornada720_kbd_probe, 142 }; 143 module_platform_driver(jornada720_kbd_driver); 144