diff options
Diffstat (limited to 'drivers/staging/dream/synaptics_i2c_rmi.c')
| -rw-r--r-- | drivers/staging/dream/synaptics_i2c_rmi.c | 649 |
1 files changed, 0 insertions, 649 deletions
diff --git a/drivers/staging/dream/synaptics_i2c_rmi.c b/drivers/staging/dream/synaptics_i2c_rmi.c deleted file mode 100644 index 3320359408a..00000000000 --- a/drivers/staging/dream/synaptics_i2c_rmi.c +++ /dev/null @@ -1,649 +0,0 @@ -/* - * Support for synaptics touchscreen. - * - * Copyright (C) 2007 Google, Inc. - * Author: Arve Hjønnevåg <arve@android.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * http://www.synaptics.com/sites/default/files/511_000099_01F.pdf - */ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/slab.h> -#ifdef CONFIG_HAS_EARLYSUSPEND -#include <linux/earlysuspend.h> -#endif -#include <linux/hrtimer.h> -#include <linux/i2c.h> -#include <linux/input.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include "synaptics_i2c_rmi.h" - -static struct workqueue_struct *synaptics_wq; - -struct synaptics_ts_data { - u16 addr; - struct i2c_client *client; - struct input_dev *input_dev; - int use_irq; - struct hrtimer timer; - struct work_struct work; - u16 max[2]; - int snap_state[2][2]; - int snap_down_on[2]; - int snap_down_off[2]; - int snap_up_on[2]; - int snap_up_off[2]; - int snap_down[2]; - int snap_up[2]; - u32 flags; - int (*power)(int on); -#ifdef CONFIG_HAS_EARLYSUSPEND - struct early_suspend early_suspend; -#endif -}; - -static int i2c_set(struct synaptics_ts_data *ts, u8 reg, u8 val, char *msg) -{ - int ret = i2c_smbus_write_byte_data(ts->client, reg, val); - if (ret < 0) - pr_err("i2c_smbus_write_byte_data failed (%s)\n", msg); - return ret; -} - -static int i2c_read(struct synaptics_ts_data *ts, u8 reg, char *msg) -{ - int ret = i2c_smbus_read_byte_data(ts->client, reg); - if (ret < 0) - pr_err("i2c_smbus_read_byte_data failed (%s)\n", msg); - return ret; -} -#ifdef CONFIG_HAS_EARLYSUSPEND -static void synaptics_ts_early_suspend(struct early_suspend *h); -static void synaptics_ts_late_resume(struct early_suspend *h); -#endif - -static int synaptics_init_panel(struct synaptics_ts_data *ts) -{ - int ret; - - ret = i2c_set(ts, 0xff, 0x10, "set page select"); - if (ret == 0) - ret = i2c_set(ts, 0x41, 0x04, "set No Clip Z"); - - ret = i2c_set(ts, 0xff, 0x04, "fallback page select"); - ret = i2c_set(ts, 0xf0, 0x81, "select 80 reports per second"); - return ret; -} - -static void decode_report(struct synaptics_ts_data *ts, u8 *buf) -{ -/* - * This sensor sends two 6-byte absolute finger reports, an optional - * 2-byte relative report followed by a status byte. This function - * reads the two finger reports and transforms the coordinates - * according the platform data so they can be aligned with the lcd - * behind the touchscreen. Typically we flip the y-axis since the - * sensor uses the bottom left corner as the origin, but if the sensor - * is mounted upside down the platform data will request that the - * x-axis should be flipped instead. The snap to inactive edge border - * are used to allow tapping the edges of the screen on the G1. The - * active area of the touchscreen is smaller than the lcd. When the - * finger gets close the edge of the screen we snap it to the - * edge. This allows ui elements at the edge of the screen to be hit, - * and it prevents hitting ui elements that are not at the edge of the - * screen when the finger is touching the edge. - */ - int pos[2][2]; - int f, a; - int base = 2; - int z = buf[1]; - int finger = buf[0] & 7; - - for (f = 0; f < 2; f++) { - u32 flip_flag = SYNAPTICS_FLIP_X; - for (a = 0; a < 2; a++) { - int p = buf[base + 1]; - p |= (u16)(buf[base] & 0x1f) << 8; - if (ts->flags & flip_flag) - p = ts->max[a] - p; - if (ts->flags & SYNAPTICS_SNAP_TO_INACTIVE_EDGE) { - if (ts->snap_state[f][a]) { - if (p <= ts->snap_down_off[a]) - p = ts->snap_down[a]; - else if (p >= ts->snap_up_off[a]) - p = ts->snap_up[a]; - else - ts->snap_state[f][a] = 0; - } else { - if (p <= ts->snap_down_on[a]) { - p = ts->snap_down[a]; - ts->snap_state[f][a] = 1; - } else if (p >= ts->snap_up_on[a]) { - p = ts->snap_up[a]; - ts->snap_state[f][a] = 1; - } - } - } - pos[f][a] = p; - base += 2; - flip_flag <<= 1; - } - base += 2; - if (ts->flags & SYNAPTICS_SWAP_XY) - swap(pos[f][0], pos[f][1]); - } - if (z) { - input_report_abs(ts->input_dev, ABS_X, pos[0][0]); - input_report_abs(ts->input_dev, ABS_Y, pos[0][1]); - } - input_report_abs(ts->input_dev, ABS_PRESSURE, z); - input_report_key(ts->input_dev, BTN_TOUCH, finger); - input_sync(ts->input_dev); -} - -static void synaptics_ts_work_func(struct work_struct *work) -{ - int i; - int ret; - int bad_data = 0; - struct i2c_msg msg[2]; - u8 start_reg = 0; - u8 buf[15]; - struct synaptics_ts_data *ts = - container_of(work, struct synaptics_ts_data, work); - - msg[0].addr = ts->client->addr; - msg[0].flags = 0; - msg[0].len = 1; - msg[0].buf = &start_reg; - msg[1].addr = ts->client->addr; - msg[1].flags = I2C_M_RD; - msg[1].len = sizeof(buf); - msg[1].buf = buf; - - for (i = 0; i < ((ts->use_irq && !bad_data) ? 1 : 10); i++) { - ret = i2c_transfer(ts->client->adapter, msg, 2); - if (ret < 0) { - pr_err("ts_work: i2c_transfer failed\n"); - bad_data = 1; - continue; - } - if ((buf[14] & 0xc0) != 0x40) { - pr_warning("synaptics_ts_work_func:" - " bad read %x %x %x %x %x %x %x %x %x" - " %x %x %x %x %x %x, ret %d\n", - buf[0], buf[1], buf[2], buf[3], - buf[4], buf[5], buf[6], buf[7], - buf[8], buf[9], buf[10], buf[11], - buf[12], buf[13], buf[14], ret); - if (bad_data) - synaptics_init_panel(ts); - bad_data = 1; - continue; - } - bad_data = 0; - if ((buf[14] & 1) == 0) - break; - - decode_report(ts, buf); - } -} - -static enum hrtimer_restart synaptics_ts_timer_func(struct hrtimer *timer) -{ - struct synaptics_ts_data *ts = - container_of(timer, struct synaptics_ts_data, timer); - - queue_work(synaptics_wq, &ts->work); - - hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL); - return HRTIMER_NORESTART; -} - -static irqreturn_t synaptics_ts_irq_handler(int irq, void *dev_id) -{ - struct synaptics_ts_data *ts = dev_id; - - synaptics_ts_work_func(&ts->work); - return IRQ_HANDLED; -} - -static int detect(struct synaptics_ts_data *ts, u32 *panel_version) -{ - int ret; - int retry = 10; - - ret = i2c_set(ts, 0xf4, 0x01, "reset device"); - - while (retry-- > 0) { - ret = i2c_smbus_read_byte_data(ts->client, 0xe4); - if (ret >= 0) - break; - msleep(100); - } - if (ret < 0) { - pr_err("i2c_smbus_read_byte_data failed\n"); - return ret; - } - - *panel_version = ret << 8; - ret = i2c_read(ts, 0xe5, "product minor"); - if (ret < 0) - return ret; - *panel_version |= ret; - - ret = i2c_read(ts, 0xe3, "property"); - if (ret < 0) - return ret; - - pr_info("synaptics: version %x, product property %x\n", - *panel_version, ret); - return 0; -} - -static void compute_areas(struct synaptics_ts_data *ts, - struct synaptics_i2c_rmi_platform_data *pdata, - u16 max_x, u16 max_y) -{ - int inactive_area_left; - int inactive_area_right; - int inactive_area_top; - int inactive_area_bottom; - int snap_left_on; - int snap_left_off; - int snap_right_on; - int snap_right_off; - int snap_top_on; - int snap_top_off; - int snap_bottom_on; - int snap_bottom_off; - int fuzz_x; - int fuzz_y; - int fuzz_p; - int fuzz_w; - int swapped = !!(ts->flags & SYNAPTICS_SWAP_XY); - - inactive_area_left = pdata->inactive_left; - inactive_area_right = pdata->inactive_right; - inactive_area_top = pdata->inactive_top; - inactive_area_bottom = pdata->inactive_bottom; - snap_left_on = pdata->snap_left_on; - snap_left_off = pdata->snap_left_off; - snap_right_on = pdata->snap_right_on; - snap_right_off = pdata->snap_right_off; - snap_top_on = pdata->snap_top_on; - snap_top_off = pdata->snap_top_off; - snap_bottom_on = pdata->snap_bottom_on; - snap_bottom_off = pdata->snap_bottom_off; - fuzz_x = pdata->fuzz_x; - fuzz_y = pdata->fuzz_y; - fuzz_p = pdata->fuzz_p; - fuzz_w = pdata->fuzz_w; - - inactive_area_left = inactive_area_left * max_x / 0x10000; - inactive_area_right = inactive_area_right * max_x / 0x10000; - inactive_area_top = inactive_area_top * max_y / 0x10000; - inactive_area_bottom = inactive_area_bottom * max_y / 0x10000; - snap_left_on = snap_left_on * max_x / 0x10000; - snap_left_off = snap_left_off * max_x / 0x10000; - snap_right_on = snap_right_on * max_x / 0x10000; - snap_right_off = snap_right_off * max_x / 0x10000; - snap_top_on = snap_top_on * max_y / 0x10000; - snap_top_off = snap_top_off * max_y / 0x10000; - snap_bottom_on = snap_bottom_on * max_y / 0x10000; - snap_bottom_off = snap_bottom_off * max_y / 0x10000; - fuzz_x = fuzz_x * max_x / 0x10000; - fuzz_y = fuzz_y * max_y / 0x10000; - - - ts->snap_down[swapped] = -inactive_area_left; - ts->snap_up[swapped] = max_x + inactive_area_right; - ts->snap_down[!swapped] = -inactive_area_top; - ts->snap_up[!swapped] = max_y + inactive_area_bottom; - ts->snap_down_on[swapped] = snap_left_on; - ts->snap_down_off[swapped] = snap_left_off; - ts->snap_up_on[swapped] = max_x - snap_right_on; - ts->snap_up_off[swapped] = max_x - snap_right_off; - ts->snap_down_on[!swapped] = snap_top_on; - ts->snap_down_off[!swapped] = snap_top_off; - ts->snap_up_on[!swapped] = max_y - snap_bottom_on; - ts->snap_up_off[!swapped] = max_y - snap_bottom_off; - pr_info("synaptics_ts_probe: max_x %d, max_y %d\n", max_x, max_y); - pr_info("synaptics_ts_probe: inactive_x %d %d, inactive_y %d %d\n", - inactive_area_left, inactive_area_right, - inactive_area_top, inactive_area_bottom); - pr_info("synaptics_ts_probe: snap_x %d-%d %d-%d, snap_y %d-%d %d-%d\n", - snap_left_on, snap_left_off, snap_right_on, snap_right_off, - snap_top_on, snap_top_off, snap_bottom_on, snap_bottom_off); - - input_set_abs_params(ts->input_dev, ABS_X, - -inactive_area_left, max_x + inactive_area_right, - fuzz_x, 0); - input_set_abs_params(ts->input_dev, ABS_Y, - -inactive_area_top, max_y + inactive_area_bottom, - fuzz_y, 0); - input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 255, fuzz_p, 0); -} - -static struct synaptics_i2c_rmi_platform_data fake_pdata; - -static int __devinit synaptics_ts_probe( - struct i2c_client *client, const struct i2c_device_id *id) -{ - struct synaptics_ts_data *ts; - u8 buf0[4]; - u8 buf1[8]; - struct i2c_msg msg[2]; - int ret = 0; - struct synaptics_i2c_rmi_platform_data *pdata; - u32 panel_version = 0; - u16 max_x, max_y; - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - pr_err("synaptics_ts_probe: need I2C_FUNC_I2C\n"); - ret = -ENODEV; - goto err_check_functionality_failed; - } - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) { - pr_err("synaptics_ts_probe: need I2C_FUNC_SMBUS_WORD_DATA\n"); - ret = -ENODEV; - goto err_check_functionality_failed; - } - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) { - pr_err("synaptics_ts_probe: need I2C_FUNC_SMBUS_WORD_DATA\n"); - ret = -ENODEV; - goto err_check_functionality_failed; - } - - ts = kzalloc(sizeof(*ts), GFP_KERNEL); - if (ts == NULL) { - ret = -ENOMEM; - goto err_alloc_data_failed; - } - INIT_WORK(&ts->work, synaptics_ts_work_func); - ts->client = client; - i2c_set_clientdata(client, ts); - pdata = client->dev.platform_data; - if (pdata) - ts->power = pdata->power; - else - pdata = &fake_pdata; - - if (ts->power) { - ret = ts->power(1); - if (ret < 0) { - pr_err("synaptics_ts_probe power on failed\n"); - goto err_power_failed; - } - } - - ret = detect(ts, &panel_version); - if (ret) - goto err_detect_failed; - - while (pdata->version > panel_version) - pdata++; - ts->flags = pdata->flags; - - ret = i2c_read(ts, 0xf0, "device control"); - if (ret < 0) - goto err_detect_failed; - pr_info("synaptics: device control %x\n", ret); - - ret = i2c_read(ts, 0xf1, "interrupt enable"); - if (ret < 0) - goto err_detect_failed; - pr_info("synaptics_ts_probe: interrupt enable %x\n", ret); - - ret = i2c_set(ts, 0xf1, 0, "disable interrupt"); - if (ret < 0) - goto err_detect_failed; - - msg[0].addr = ts->client->addr; - msg[0].flags = 0; - msg[0].len = 1; - msg[0].buf = buf0; - buf0[0] = 0xe0; - msg[1].addr = ts->client->addr; - msg[1].flags = I2C_M_RD; - msg[1].len = 8; - msg[1].buf = buf1; - ret = i2c_transfer(ts->client->adapter, msg, 2); - if (ret < 0) { - pr_err("i2c_transfer failed\n"); - goto err_detect_failed; - } - pr_info("synaptics_ts_probe: 0xe0: %x %x %x %x %x %x %x %x\n", - buf1[0], buf1[1], buf1[2], buf1[3], - buf1[4], buf1[5], buf1[6], buf1[7]); - - ret = i2c_set(ts, 0xff, 0x10, "page select = 0x10"); - if (ret < 0) - goto err_detect_failed; - - ret = i2c_smbus_read_word_data(ts->client, 0x04); - if (ret < 0) { - pr_err("i2c_smbus_read_word_data failed\n"); - goto err_detect_failed; - } - ts->max[0] = max_x = (ret >> 8 & 0xff) | ((ret & 0x1f) << 8); - ret = i2c_smbus_read_word_data(ts->client, 0x06); - if (ret < 0) { - pr_err("i2c_smbus_read_word_data failed\n"); - goto err_detect_failed; - } - ts->max[1] = max_y = (ret >> 8 & 0xff) | ((ret & 0x1f) << 8); - if (ts->flags & SYNAPTICS_SWAP_XY) - swap(max_x, max_y); - - /* will also switch back to page 0x04 */ - ret = synaptics_init_panel(ts); - if (ret < 0) { - pr_err("synaptics_init_panel failed\n"); - goto err_detect_failed; - } - - ts->input_dev = input_allocate_device(); - if (ts->input_dev == NULL) { - ret = -ENOMEM; - pr_err("synaptics: Failed to allocate input device\n"); - goto err_input_dev_alloc_failed; - } - ts->input_dev->name = "synaptics-rmi-touchscreen"; - ts->input_dev->phys = "msm/input0"; - ts->input_dev->id.bustype = BUS_I2C; - - __set_bit(EV_SYN, ts->input_dev->evbit); - __set_bit(EV_KEY, ts->input_dev->evbit); - __set_bit(BTN_TOUCH, ts->input_dev->keybit); - __set_bit(EV_ABS, ts->input_dev->evbit); - - compute_areas(ts, pdata, max_x, max_y); - - - ret = input_register_device(ts->input_dev); - if (ret) { - pr_err("synaptics: Unable to register %s input device\n", - ts->input_dev->name); - goto err_input_register_device_failed; - } - if (client->irq) { - ret = request_threaded_irq(client->irq, NULL, - synaptics_ts_irq_handler, - IRQF_TRIGGER_LOW|IRQF_ONESHOT, - client->name, ts); - if (ret == 0) { - ret = i2c_set(ts, 0xf1, 0x01, "enable abs int"); - if (ret) - free_irq(client->irq, ts); - } - if (ret == 0) - ts->use_irq = 1; - else - dev_err(&client->dev, "request_irq failed\n"); - } - if (!ts->use_irq) { - hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - ts->timer.function = synaptics_ts_timer_func; - hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL); - } -#ifdef CONFIG_HAS_EARLYSUSPEND - ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1; - ts->early_suspend.suspend = synaptics_ts_early_suspend; - ts->early_suspend.resume = synaptics_ts_late_resume; - register_early_suspend(&ts->early_suspend); -#endif - - pr_info("synaptics: Start touchscreen %s in %s mode\n", - ts->input_dev->name, ts->use_irq ? "interrupt" : "polling"); - - return 0; - -err_input_register_device_failed: - input_free_device(ts->input_dev); - -err_input_dev_alloc_failed: -err_detect_failed: -err_power_failed: - kfree(ts); -err_alloc_data_failed: -err_check_functionality_failed: - return ret; -} - -static int synaptics_ts_remove(struct i2c_client *client) -{ - struct synaptics_ts_data *ts = i2c_get_clientdata(client); -#ifdef CONFIG_HAS_EARLYSUSPEND - unregister_early_suspend(&ts->early_suspend); -#endif - if (ts->use_irq) - free_irq(client->irq, ts); - else - hrtimer_cancel(&ts->timer); - input_unregister_device(ts->input_dev); - kfree(ts); - return 0; -} - -#ifdef CONFIG_PM -static int synaptics_ts_suspend(struct i2c_client *client, pm_message_t mesg) -{ - int ret; - struct synaptics_ts_data *ts = i2c_get_clientdata(client); - - if (ts->use_irq) - disable_irq(client->irq); - else - hrtimer_cancel(&ts->timer); - ret = cancel_work_sync(&ts->work); - if (ret && ts->use_irq) /* if work was pending disable-count is now 2 */ - enable_irq(client->irq); - i2c_set(ts, 0xf1, 0, "disable interrupt"); - i2c_set(ts, 0xf0, 0x86, "deep sleep"); - - if (ts->power) { - ret = ts->power(0); - if (ret < 0) - pr_err("synaptics_ts_suspend power off failed\n"); - } - return 0; -} - -static int synaptics_ts_resume(struct i2c_client *client) -{ - int ret; - struct synaptics_ts_data *ts = i2c_get_clientdata(client); - - if (ts->power) { - ret = ts->power(1); - if (ret < 0) - pr_err("synaptics_ts_resume power on failed\n"); - } - - synaptics_init_panel(ts); - - if (ts->use_irq) { - enable_irq(client->irq); - i2c_set(ts, 0xf1, 0x01, "enable abs int"); - } else - hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL); - - return 0; -} - -#ifdef CONFIG_HAS_EARLYSUSPEND -static void synaptics_ts_early_suspend(struct early_suspend *h) -{ - struct synaptics_ts_data *ts; - ts = container_of(h, struct synaptics_ts_data, early_suspend); - synaptics_ts_suspend(ts->client, PMSG_SUSPEND); -} - -static void synaptics_ts_late_resume(struct early_suspend *h) -{ - struct synaptics_ts_data *ts; - ts = container_of(h, struct synaptics_ts_data, early_suspend); - synaptics_ts_resume(ts->client); -} -#endif -#else -#define synaptics_ts_suspend NULL -#define synaptics_ts_resume NULL -#endif - - - -static const struct i2c_device_id synaptics_ts_id[] = { - { SYNAPTICS_I2C_RMI_NAME, 0 }, - { } -}; - -static struct i2c_driver synaptics_ts_driver = { - .probe = synaptics_ts_probe, - .remove = synaptics_ts_remove, -#ifndef CONFIG_HAS_EARLYSUSPEND - .suspend = synaptics_ts_suspend, - .resume = synaptics_ts_resume, -#endif - .id_table = synaptics_ts_id, - .driver = { - .name = SYNAPTICS_I2C_RMI_NAME, - }, -}; - -static int __devinit synaptics_ts_init(void) -{ - synaptics_wq = create_singlethread_workqueue("synaptics_wq"); - if (!synaptics_wq) - return -ENOMEM; - return i2c_add_driver(&synaptics_ts_driver); -} - -static void __exit synaptics_ts_exit(void) -{ - i2c_del_driver(&synaptics_ts_driver); - if (synaptics_wq) - destroy_workqueue(synaptics_wq); -} - -module_init(synaptics_ts_init); -module_exit(synaptics_ts_exit); - -MODULE_DESCRIPTION("Synaptics Touchscreen Driver"); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Arve Hjønnevåg <arve@android.com>"); |