Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * twl4030-vibra.c - TWL4030 Vibrator driver |
| 3 | * |
| 4 | * Copyright (C) 2008-2010 Nokia Corporation |
| 5 | * |
| 6 | * Written by Henrik Saari <henrik.saari@nokia.com> |
| 7 | * Updates by Felipe Balbi <felipe.balbi@nokia.com> |
| 8 | * Input by Jari Vanhala <ext-jari.vanhala@nokia.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 22 | * 02110-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/jiffies.h> |
| 28 | #include <linux/platform_device.h> |
Peter Ujfalusi | 64b9e4d | 2012-09-10 13:46:26 +0300 | [diff] [blame] | 29 | #include <linux/of.h> |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 30 | #include <linux/workqueue.h> |
| 31 | #include <linux/i2c/twl.h> |
Peter Ujfalusi | 57fe725 | 2011-05-31 12:02:49 +0300 | [diff] [blame] | 32 | #include <linux/mfd/twl4030-audio.h> |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 33 | #include <linux/input.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 35 | |
| 36 | /* MODULE ID2 */ |
| 37 | #define LEDEN 0x00 |
| 38 | |
| 39 | /* ForceFeedback */ |
| 40 | #define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */ |
| 41 | |
| 42 | struct vibra_info { |
| 43 | struct device *dev; |
| 44 | struct input_dev *input_dev; |
| 45 | |
| 46 | struct workqueue_struct *workqueue; |
| 47 | struct work_struct play_work; |
| 48 | |
| 49 | bool enabled; |
| 50 | int speed; |
| 51 | int direction; |
| 52 | |
| 53 | bool coexist; |
| 54 | }; |
| 55 | |
| 56 | static void vibra_disable_leds(void) |
| 57 | { |
| 58 | u8 reg; |
| 59 | |
| 60 | /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */ |
| 61 | twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN); |
| 62 | reg &= ~0x03; |
| 63 | twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg); |
| 64 | } |
| 65 | |
| 66 | /* Powers H-Bridge and enables audio clk */ |
| 67 | static void vibra_enable(struct vibra_info *info) |
| 68 | { |
| 69 | u8 reg; |
| 70 | |
Peter Ujfalusi | 57fe725 | 2011-05-31 12:02:49 +0300 | [diff] [blame] | 71 | twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 72 | |
| 73 | /* turn H-Bridge on */ |
| 74 | twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 75 | ®, TWL4030_REG_VIBRA_CTL); |
| 76 | twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 77 | (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL); |
| 78 | |
Peter Ujfalusi | 57fe725 | 2011-05-31 12:02:49 +0300 | [diff] [blame] | 79 | twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 80 | |
| 81 | info->enabled = true; |
| 82 | } |
| 83 | |
| 84 | static void vibra_disable(struct vibra_info *info) |
| 85 | { |
| 86 | u8 reg; |
| 87 | |
| 88 | /* Power down H-Bridge */ |
| 89 | twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 90 | ®, TWL4030_REG_VIBRA_CTL); |
| 91 | twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 92 | (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL); |
| 93 | |
Peter Ujfalusi | 57fe725 | 2011-05-31 12:02:49 +0300 | [diff] [blame] | 94 | twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL); |
| 95 | twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 96 | |
| 97 | info->enabled = false; |
| 98 | } |
| 99 | |
| 100 | static void vibra_play_work(struct work_struct *work) |
| 101 | { |
| 102 | struct vibra_info *info = container_of(work, |
| 103 | struct vibra_info, play_work); |
| 104 | int dir; |
| 105 | int pwm; |
| 106 | u8 reg; |
| 107 | |
| 108 | dir = info->direction; |
| 109 | pwm = info->speed; |
| 110 | |
| 111 | twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 112 | ®, TWL4030_REG_VIBRA_CTL); |
| 113 | if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) { |
| 114 | |
| 115 | if (!info->enabled) |
| 116 | vibra_enable(info); |
| 117 | |
| 118 | /* set vibra rotation direction */ |
| 119 | twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 120 | ®, TWL4030_REG_VIBRA_CTL); |
| 121 | reg = (dir) ? (reg | TWL4030_VIBRA_DIR) : |
| 122 | (reg & ~TWL4030_VIBRA_DIR); |
| 123 | twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 124 | reg, TWL4030_REG_VIBRA_CTL); |
| 125 | |
| 126 | /* set PWM, 1 = max, 255 = min */ |
| 127 | twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, |
| 128 | 256 - pwm, TWL4030_REG_VIBRA_SET); |
| 129 | } else { |
| 130 | if (info->enabled) |
| 131 | vibra_disable(info); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | /*** Input/ForceFeedback ***/ |
| 136 | |
| 137 | static int vibra_play(struct input_dev *input, void *data, |
| 138 | struct ff_effect *effect) |
| 139 | { |
| 140 | struct vibra_info *info = input_get_drvdata(input); |
| 141 | |
| 142 | info->speed = effect->u.rumble.strong_magnitude >> 8; |
| 143 | if (!info->speed) |
| 144 | info->speed = effect->u.rumble.weak_magnitude >> 9; |
| 145 | info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1; |
| 146 | queue_work(info->workqueue, &info->play_work); |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | static int twl4030_vibra_open(struct input_dev *input) |
| 151 | { |
| 152 | struct vibra_info *info = input_get_drvdata(input); |
| 153 | |
| 154 | info->workqueue = create_singlethread_workqueue("vibra"); |
| 155 | if (info->workqueue == NULL) { |
| 156 | dev_err(&input->dev, "couldn't create workqueue\n"); |
| 157 | return -ENOMEM; |
| 158 | } |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static void twl4030_vibra_close(struct input_dev *input) |
| 163 | { |
| 164 | struct vibra_info *info = input_get_drvdata(input); |
| 165 | |
| 166 | cancel_work_sync(&info->play_work); |
| 167 | INIT_WORK(&info->play_work, vibra_play_work); /* cleanup */ |
| 168 | destroy_workqueue(info->workqueue); |
| 169 | info->workqueue = NULL; |
| 170 | |
| 171 | if (info->enabled) |
| 172 | vibra_disable(info); |
| 173 | } |
| 174 | |
| 175 | /*** Module ***/ |
Dmitry Torokhov | 7a0a1df | 2012-03-11 16:02:06 -0700 | [diff] [blame] | 176 | #ifdef CONFIG_PM_SLEEP |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 177 | static int twl4030_vibra_suspend(struct device *dev) |
| 178 | { |
| 179 | struct platform_device *pdev = to_platform_device(dev); |
| 180 | struct vibra_info *info = platform_get_drvdata(pdev); |
| 181 | |
| 182 | if (info->enabled) |
| 183 | vibra_disable(info); |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static int twl4030_vibra_resume(struct device *dev) |
| 189 | { |
| 190 | vibra_disable_leds(); |
| 191 | return 0; |
| 192 | } |
Dmitry Torokhov | f3761c0 | 2012-02-24 00:51:40 -0800 | [diff] [blame] | 193 | #endif |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 194 | |
| 195 | static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops, |
| 196 | twl4030_vibra_suspend, twl4030_vibra_resume); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 197 | |
Peter Ujfalusi | 64b9e4d | 2012-09-10 13:46:26 +0300 | [diff] [blame] | 198 | static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata, |
| 199 | struct device_node *node) |
| 200 | { |
| 201 | if (pdata && pdata->coexist) |
| 202 | return true; |
| 203 | |
| 204 | if (of_find_node_by_name(node, "codec")) |
| 205 | return true; |
| 206 | |
| 207 | return false; |
| 208 | } |
| 209 | |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 210 | static int __devinit twl4030_vibra_probe(struct platform_device *pdev) |
| 211 | { |
Peter Ujfalusi | 4ae6df5 | 2011-05-31 15:21:13 +0300 | [diff] [blame] | 212 | struct twl4030_vibra_data *pdata = pdev->dev.platform_data; |
Peter Ujfalusi | 64b9e4d | 2012-09-10 13:46:26 +0300 | [diff] [blame] | 213 | struct device_node *twl4030_core_node = pdev->dev.parent->of_node; |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 214 | struct vibra_info *info; |
| 215 | int ret; |
| 216 | |
Peter Ujfalusi | 64b9e4d | 2012-09-10 13:46:26 +0300 | [diff] [blame] | 217 | if (!pdata && !twl4030_core_node) { |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 218 | dev_dbg(&pdev->dev, "platform_data not available\n"); |
| 219 | return -EINVAL; |
| 220 | } |
| 221 | |
| 222 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
| 223 | if (!info) |
| 224 | return -ENOMEM; |
| 225 | |
| 226 | info->dev = &pdev->dev; |
Peter Ujfalusi | 64b9e4d | 2012-09-10 13:46:26 +0300 | [diff] [blame] | 227 | info->coexist = twl4030_vibra_check_coexist(pdata, twl4030_core_node); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 228 | INIT_WORK(&info->play_work, vibra_play_work); |
| 229 | |
| 230 | info->input_dev = input_allocate_device(); |
| 231 | if (info->input_dev == NULL) { |
| 232 | dev_err(&pdev->dev, "couldn't allocate input device\n"); |
| 233 | ret = -ENOMEM; |
| 234 | goto err_kzalloc; |
| 235 | } |
| 236 | |
| 237 | input_set_drvdata(info->input_dev, info); |
| 238 | |
| 239 | info->input_dev->name = "twl4030:vibrator"; |
| 240 | info->input_dev->id.version = 1; |
| 241 | info->input_dev->dev.parent = pdev->dev.parent; |
| 242 | info->input_dev->open = twl4030_vibra_open; |
| 243 | info->input_dev->close = twl4030_vibra_close; |
| 244 | __set_bit(FF_RUMBLE, info->input_dev->ffbit); |
| 245 | |
| 246 | ret = input_ff_create_memless(info->input_dev, NULL, vibra_play); |
| 247 | if (ret < 0) { |
| 248 | dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n"); |
| 249 | goto err_ialloc; |
| 250 | } |
| 251 | |
| 252 | ret = input_register_device(info->input_dev); |
| 253 | if (ret < 0) { |
| 254 | dev_dbg(&pdev->dev, "couldn't register input device\n"); |
| 255 | goto err_iff; |
| 256 | } |
| 257 | |
| 258 | vibra_disable_leds(); |
| 259 | |
| 260 | platform_set_drvdata(pdev, info); |
| 261 | return 0; |
| 262 | |
| 263 | err_iff: |
| 264 | input_ff_destroy(info->input_dev); |
| 265 | err_ialloc: |
| 266 | input_free_device(info->input_dev); |
| 267 | err_kzalloc: |
| 268 | kfree(info); |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | static int __devexit twl4030_vibra_remove(struct platform_device *pdev) |
| 273 | { |
| 274 | struct vibra_info *info = platform_get_drvdata(pdev); |
| 275 | |
| 276 | /* this also free ff-memless and calls close if needed */ |
| 277 | input_unregister_device(info->input_dev); |
| 278 | kfree(info); |
| 279 | platform_set_drvdata(pdev, NULL); |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static struct platform_driver twl4030_vibra_driver = { |
| 285 | .probe = twl4030_vibra_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame^] | 286 | .remove = twl4030_vibra_remove, |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 287 | .driver = { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 288 | .name = "twl4030-vibra", |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 289 | .owner = THIS_MODULE, |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 290 | .pm = &twl4030_vibra_pm_ops, |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 291 | }, |
| 292 | }; |
JJ Ding | 840a746 | 2011-11-29 11:08:40 -0800 | [diff] [blame] | 293 | module_platform_driver(twl4030_vibra_driver); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 294 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 295 | MODULE_ALIAS("platform:twl4030-vibra"); |
Jari Vanhala | 3dd1b39 | 2010-03-09 00:29:46 -0800 | [diff] [blame] | 296 | MODULE_DESCRIPTION("TWL4030 Vibra driver"); |
| 297 | MODULE_LICENSE("GPL"); |
| 298 | MODULE_AUTHOR("Nokia Corporation"); |