Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 1 | /* |
| 2 | * HTC Shift touchscreen driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Pau Oliva Fora <pof@eslack.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/input.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/io.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/irq.h> |
| 19 | #include <linux/isa.h> |
| 20 | #include <linux/ioport.h> |
| 21 | #include <linux/dmi.h> |
| 22 | |
| 23 | MODULE_AUTHOR("Pau Oliva Fora <pau@eslack.org>"); |
| 24 | MODULE_DESCRIPTION("HTC Shift touchscreen driver"); |
| 25 | MODULE_LICENSE("GPL"); |
| 26 | |
| 27 | #define HTCPEN_PORT_IRQ_CLEAR 0x068 |
| 28 | #define HTCPEN_PORT_INIT 0x06c |
| 29 | #define HTCPEN_PORT_INDEX 0x0250 |
| 30 | #define HTCPEN_PORT_DATA 0x0251 |
| 31 | #define HTCPEN_IRQ 3 |
| 32 | |
| 33 | #define DEVICE_ENABLE 0xa2 |
| 34 | #define DEVICE_DISABLE 0xa3 |
| 35 | |
| 36 | #define X_INDEX 3 |
| 37 | #define Y_INDEX 5 |
| 38 | #define TOUCH_INDEX 0xb |
| 39 | #define LSB_XY_INDEX 0xc |
| 40 | #define X_AXIS_MAX 2040 |
| 41 | #define Y_AXIS_MAX 2040 |
| 42 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 43 | static bool invert_x; |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 44 | module_param(invert_x, bool, 0644); |
| 45 | MODULE_PARM_DESC(invert_x, "If set, X axis is inverted"); |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 46 | static bool invert_y; |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 47 | module_param(invert_y, bool, 0644); |
| 48 | MODULE_PARM_DESC(invert_y, "If set, Y axis is inverted"); |
| 49 | |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 50 | static irqreturn_t htcpen_interrupt(int irq, void *handle) |
| 51 | { |
| 52 | struct input_dev *htcpen_dev = handle; |
| 53 | unsigned short x, y, xy; |
| 54 | |
| 55 | /* 0 = press; 1 = release */ |
| 56 | outb_p(TOUCH_INDEX, HTCPEN_PORT_INDEX); |
| 57 | |
| 58 | if (inb_p(HTCPEN_PORT_DATA)) { |
| 59 | input_report_key(htcpen_dev, BTN_TOUCH, 0); |
| 60 | } else { |
| 61 | outb_p(X_INDEX, HTCPEN_PORT_INDEX); |
| 62 | x = inb_p(HTCPEN_PORT_DATA); |
| 63 | |
| 64 | outb_p(Y_INDEX, HTCPEN_PORT_INDEX); |
| 65 | y = inb_p(HTCPEN_PORT_DATA); |
| 66 | |
| 67 | outb_p(LSB_XY_INDEX, HTCPEN_PORT_INDEX); |
| 68 | xy = inb_p(HTCPEN_PORT_DATA); |
| 69 | |
| 70 | /* get high resolution value of X and Y using LSB */ |
| 71 | x = X_AXIS_MAX - ((x * 8) + ((xy >> 4) & 0xf)); |
| 72 | y = (y * 8) + (xy & 0xf); |
| 73 | if (invert_x) |
| 74 | x = X_AXIS_MAX - x; |
| 75 | if (invert_y) |
| 76 | y = Y_AXIS_MAX - y; |
| 77 | |
| 78 | if (x != X_AXIS_MAX && x != 0) { |
| 79 | input_report_key(htcpen_dev, BTN_TOUCH, 1); |
| 80 | input_report_abs(htcpen_dev, ABS_X, x); |
| 81 | input_report_abs(htcpen_dev, ABS_Y, y); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | input_sync(htcpen_dev); |
| 86 | |
| 87 | inb_p(HTCPEN_PORT_IRQ_CLEAR); |
| 88 | |
| 89 | return IRQ_HANDLED; |
| 90 | } |
| 91 | |
| 92 | static int htcpen_open(struct input_dev *dev) |
| 93 | { |
| 94 | outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT); |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static void htcpen_close(struct input_dev *dev) |
| 100 | { |
| 101 | outb_p(DEVICE_DISABLE, HTCPEN_PORT_INIT); |
| 102 | synchronize_irq(HTCPEN_IRQ); |
| 103 | } |
| 104 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 105 | static int htcpen_isa_probe(struct device *dev, unsigned int id) |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 106 | { |
| 107 | struct input_dev *htcpen_dev; |
| 108 | int err = -EBUSY; |
| 109 | |
| 110 | if (!request_region(HTCPEN_PORT_IRQ_CLEAR, 1, "htcpen")) { |
| 111 | printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n", |
| 112 | HTCPEN_PORT_IRQ_CLEAR); |
| 113 | goto request_region1_failed; |
| 114 | } |
| 115 | |
| 116 | if (!request_region(HTCPEN_PORT_INIT, 1, "htcpen")) { |
| 117 | printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n", |
| 118 | HTCPEN_PORT_INIT); |
| 119 | goto request_region2_failed; |
| 120 | } |
| 121 | |
| 122 | if (!request_region(HTCPEN_PORT_INDEX, 2, "htcpen")) { |
| 123 | printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n", |
| 124 | HTCPEN_PORT_INDEX); |
| 125 | goto request_region3_failed; |
| 126 | } |
| 127 | |
| 128 | htcpen_dev = input_allocate_device(); |
| 129 | if (!htcpen_dev) { |
| 130 | printk(KERN_ERR "htcpen: can't allocate device\n"); |
| 131 | err = -ENOMEM; |
| 132 | goto input_alloc_failed; |
| 133 | } |
| 134 | |
| 135 | htcpen_dev->name = "HTC Shift EC TouchScreen"; |
| 136 | htcpen_dev->id.bustype = BUS_ISA; |
| 137 | |
| 138 | htcpen_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY); |
| 139 | htcpen_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); |
| 140 | input_set_abs_params(htcpen_dev, ABS_X, 0, X_AXIS_MAX, 0, 0); |
| 141 | input_set_abs_params(htcpen_dev, ABS_Y, 0, Y_AXIS_MAX, 0, 0); |
| 142 | |
| 143 | htcpen_dev->open = htcpen_open; |
| 144 | htcpen_dev->close = htcpen_close; |
| 145 | |
| 146 | err = request_irq(HTCPEN_IRQ, htcpen_interrupt, 0, "htcpen", |
| 147 | htcpen_dev); |
| 148 | if (err) { |
| 149 | printk(KERN_ERR "htcpen: irq busy\n"); |
| 150 | goto request_irq_failed; |
| 151 | } |
| 152 | |
| 153 | inb_p(HTCPEN_PORT_IRQ_CLEAR); |
| 154 | |
| 155 | err = input_register_device(htcpen_dev); |
| 156 | if (err) |
| 157 | goto input_register_failed; |
| 158 | |
| 159 | dev_set_drvdata(dev, htcpen_dev); |
| 160 | |
| 161 | return 0; |
| 162 | |
| 163 | input_register_failed: |
| 164 | free_irq(HTCPEN_IRQ, htcpen_dev); |
| 165 | request_irq_failed: |
| 166 | input_free_device(htcpen_dev); |
| 167 | input_alloc_failed: |
| 168 | release_region(HTCPEN_PORT_INDEX, 2); |
| 169 | request_region3_failed: |
| 170 | release_region(HTCPEN_PORT_INIT, 1); |
| 171 | request_region2_failed: |
| 172 | release_region(HTCPEN_PORT_IRQ_CLEAR, 1); |
| 173 | request_region1_failed: |
| 174 | return err; |
| 175 | } |
| 176 | |
Bill Pemberton | e2619cf | 2012-11-23 21:50:47 -0800 | [diff] [blame] | 177 | static int htcpen_isa_remove(struct device *dev, unsigned int id) |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 178 | { |
| 179 | struct input_dev *htcpen_dev = dev_get_drvdata(dev); |
| 180 | |
| 181 | input_unregister_device(htcpen_dev); |
| 182 | |
| 183 | free_irq(HTCPEN_IRQ, htcpen_dev); |
| 184 | |
| 185 | release_region(HTCPEN_PORT_INDEX, 2); |
| 186 | release_region(HTCPEN_PORT_INIT, 1); |
| 187 | release_region(HTCPEN_PORT_IRQ_CLEAR, 1); |
| 188 | |
| 189 | dev_set_drvdata(dev, NULL); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | #ifdef CONFIG_PM |
| 195 | static int htcpen_isa_suspend(struct device *dev, unsigned int n, |
| 196 | pm_message_t state) |
| 197 | { |
| 198 | outb_p(DEVICE_DISABLE, HTCPEN_PORT_INIT); |
| 199 | |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | static int htcpen_isa_resume(struct device *dev, unsigned int n) |
| 204 | { |
| 205 | outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT); |
| 206 | |
| 207 | return 0; |
| 208 | } |
| 209 | #endif |
| 210 | |
| 211 | static struct isa_driver htcpen_isa_driver = { |
| 212 | .probe = htcpen_isa_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame] | 213 | .remove = htcpen_isa_remove, |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 214 | #ifdef CONFIG_PM |
| 215 | .suspend = htcpen_isa_suspend, |
| 216 | .resume = htcpen_isa_resume, |
| 217 | #endif |
| 218 | .driver = { |
| 219 | .owner = THIS_MODULE, |
| 220 | .name = "htcpen", |
| 221 | } |
| 222 | }; |
| 223 | |
| 224 | static struct dmi_system_id __initdata htcshift_dmi_table[] = { |
| 225 | { |
| 226 | .ident = "Shift", |
| 227 | .matches = { |
| 228 | DMI_MATCH(DMI_SYS_VENDOR, "High Tech Computer Corp"), |
| 229 | DMI_MATCH(DMI_PRODUCT_NAME, "Shift"), |
| 230 | }, |
| 231 | }, |
| 232 | { } |
| 233 | }; |
Dmitry Torokhov | e23ed60 | 2011-11-29 02:20:35 -0800 | [diff] [blame] | 234 | MODULE_DEVICE_TABLE(dmi, htcshift_dmi_table); |
Pau Oliva Fora | 5a18c34 | 2008-06-02 00:38:35 -0400 | [diff] [blame] | 235 | |
| 236 | static int __init htcpen_isa_init(void) |
| 237 | { |
| 238 | if (!dmi_check_system(htcshift_dmi_table)) |
| 239 | return -ENODEV; |
| 240 | |
| 241 | return isa_register_driver(&htcpen_isa_driver, 1); |
| 242 | } |
| 243 | |
| 244 | static void __exit htcpen_isa_exit(void) |
| 245 | { |
| 246 | isa_unregister_driver(&htcpen_isa_driver); |
| 247 | } |
| 248 | |
| 249 | module_init(htcpen_isa_init); |
| 250 | module_exit(htcpen_isa_exit); |