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551 lines
14 KiB
551 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2012-2016 Synaptics Incorporated |
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*/ |
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#include <linux/input.h> |
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#include <linux/input/mt.h> |
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#include <linux/rmi.h> |
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#include "rmi_driver.h" |
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#include "rmi_2d_sensor.h" |
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enum rmi_f12_object_type { |
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RMI_F12_OBJECT_NONE = 0x00, |
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RMI_F12_OBJECT_FINGER = 0x01, |
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RMI_F12_OBJECT_STYLUS = 0x02, |
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RMI_F12_OBJECT_PALM = 0x03, |
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RMI_F12_OBJECT_UNCLASSIFIED = 0x04, |
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RMI_F12_OBJECT_GLOVED_FINGER = 0x06, |
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RMI_F12_OBJECT_NARROW_OBJECT = 0x07, |
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RMI_F12_OBJECT_HAND_EDGE = 0x08, |
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RMI_F12_OBJECT_COVER = 0x0A, |
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RMI_F12_OBJECT_STYLUS_2 = 0x0B, |
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RMI_F12_OBJECT_ERASER = 0x0C, |
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RMI_F12_OBJECT_SMALL_OBJECT = 0x0D, |
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}; |
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#define F12_DATA1_BYTES_PER_OBJ 8 |
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struct f12_data { |
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struct rmi_2d_sensor sensor; |
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struct rmi_2d_sensor_platform_data sensor_pdata; |
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bool has_dribble; |
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u16 data_addr; |
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struct rmi_register_descriptor query_reg_desc; |
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struct rmi_register_descriptor control_reg_desc; |
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struct rmi_register_descriptor data_reg_desc; |
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/* F12 Data1 describes sensed objects */ |
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const struct rmi_register_desc_item *data1; |
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u16 data1_offset; |
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/* F12 Data5 describes finger ACM */ |
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const struct rmi_register_desc_item *data5; |
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u16 data5_offset; |
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/* F12 Data5 describes Pen */ |
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const struct rmi_register_desc_item *data6; |
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u16 data6_offset; |
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/* F12 Data9 reports relative data */ |
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const struct rmi_register_desc_item *data9; |
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u16 data9_offset; |
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const struct rmi_register_desc_item *data15; |
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u16 data15_offset; |
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unsigned long *abs_mask; |
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unsigned long *rel_mask; |
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}; |
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static int rmi_f12_read_sensor_tuning(struct f12_data *f12) |
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{ |
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const struct rmi_register_desc_item *item; |
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struct rmi_2d_sensor *sensor = &f12->sensor; |
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struct rmi_function *fn = sensor->fn; |
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struct rmi_device *rmi_dev = fn->rmi_dev; |
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int ret; |
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int offset; |
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u8 buf[15]; |
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int pitch_x = 0; |
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int pitch_y = 0; |
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int rx_receivers = 0; |
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int tx_receivers = 0; |
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item = rmi_get_register_desc_item(&f12->control_reg_desc, 8); |
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if (!item) { |
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dev_err(&fn->dev, |
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"F12 does not have the sensor tuning control register\n"); |
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return -ENODEV; |
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} |
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offset = rmi_register_desc_calc_reg_offset(&f12->control_reg_desc, 8); |
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if (item->reg_size > sizeof(buf)) { |
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dev_err(&fn->dev, |
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"F12 control8 should be no bigger than %zd bytes, not: %ld\n", |
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sizeof(buf), item->reg_size); |
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return -ENODEV; |
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} |
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ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr + offset, buf, |
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item->reg_size); |
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if (ret) |
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return ret; |
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offset = 0; |
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if (rmi_register_desc_has_subpacket(item, 0)) { |
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sensor->max_x = (buf[offset + 1] << 8) | buf[offset]; |
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sensor->max_y = (buf[offset + 3] << 8) | buf[offset + 2]; |
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offset += 4; |
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} |
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: max_x: %d max_y: %d\n", __func__, |
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sensor->max_x, sensor->max_y); |
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if (rmi_register_desc_has_subpacket(item, 1)) { |
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pitch_x = (buf[offset + 1] << 8) | buf[offset]; |
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pitch_y = (buf[offset + 3] << 8) | buf[offset + 2]; |
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offset += 4; |
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} |
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if (rmi_register_desc_has_subpacket(item, 2)) { |
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/* Units 1/128 sensor pitch */ |
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, |
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"%s: Inactive Border xlo:%d xhi:%d ylo:%d yhi:%d\n", |
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__func__, |
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buf[offset], buf[offset + 1], |
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buf[offset + 2], buf[offset + 3]); |
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offset += 4; |
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} |
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if (rmi_register_desc_has_subpacket(item, 3)) { |
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rx_receivers = buf[offset]; |
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tx_receivers = buf[offset + 1]; |
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offset += 2; |
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} |
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/* Skip over sensor flags */ |
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if (rmi_register_desc_has_subpacket(item, 4)) |
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offset += 1; |
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sensor->x_mm = (pitch_x * rx_receivers) >> 12; |
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sensor->y_mm = (pitch_y * tx_receivers) >> 12; |
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x_mm: %d y_mm: %d\n", __func__, |
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sensor->x_mm, sensor->y_mm); |
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return 0; |
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} |
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static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1, int size) |
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{ |
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int i; |
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struct rmi_2d_sensor *sensor = &f12->sensor; |
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int objects = f12->data1->num_subpackets; |
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if ((f12->data1->num_subpackets * F12_DATA1_BYTES_PER_OBJ) > size) |
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objects = size / F12_DATA1_BYTES_PER_OBJ; |
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for (i = 0; i < objects; i++) { |
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struct rmi_2d_sensor_abs_object *obj = &sensor->objs[i]; |
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obj->type = RMI_2D_OBJECT_NONE; |
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obj->mt_tool = MT_TOOL_FINGER; |
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switch (data1[0]) { |
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case RMI_F12_OBJECT_FINGER: |
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obj->type = RMI_2D_OBJECT_FINGER; |
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break; |
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case RMI_F12_OBJECT_STYLUS: |
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obj->type = RMI_2D_OBJECT_STYLUS; |
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obj->mt_tool = MT_TOOL_PEN; |
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break; |
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case RMI_F12_OBJECT_PALM: |
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obj->type = RMI_2D_OBJECT_PALM; |
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obj->mt_tool = MT_TOOL_PALM; |
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break; |
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case RMI_F12_OBJECT_UNCLASSIFIED: |
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obj->type = RMI_2D_OBJECT_UNCLASSIFIED; |
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break; |
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} |
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obj->x = (data1[2] << 8) | data1[1]; |
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obj->y = (data1[4] << 8) | data1[3]; |
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obj->z = data1[5]; |
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obj->wx = data1[6]; |
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obj->wy = data1[7]; |
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rmi_2d_sensor_abs_process(sensor, obj, i); |
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data1 += F12_DATA1_BYTES_PER_OBJ; |
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} |
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if (sensor->kernel_tracking) |
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input_mt_assign_slots(sensor->input, |
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sensor->tracking_slots, |
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sensor->tracking_pos, |
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sensor->nbr_fingers, |
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sensor->dmax); |
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for (i = 0; i < objects; i++) |
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rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i); |
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} |
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static irqreturn_t rmi_f12_attention(int irq, void *ctx) |
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{ |
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int retval; |
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struct rmi_function *fn = ctx; |
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struct rmi_device *rmi_dev = fn->rmi_dev; |
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struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev); |
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struct f12_data *f12 = dev_get_drvdata(&fn->dev); |
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struct rmi_2d_sensor *sensor = &f12->sensor; |
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int valid_bytes = sensor->pkt_size; |
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if (drvdata->attn_data.data) { |
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if (sensor->attn_size > drvdata->attn_data.size) |
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valid_bytes = drvdata->attn_data.size; |
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else |
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valid_bytes = sensor->attn_size; |
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memcpy(sensor->data_pkt, drvdata->attn_data.data, |
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valid_bytes); |
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drvdata->attn_data.data += valid_bytes; |
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drvdata->attn_data.size -= valid_bytes; |
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} else { |
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retval = rmi_read_block(rmi_dev, f12->data_addr, |
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sensor->data_pkt, sensor->pkt_size); |
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if (retval < 0) { |
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dev_err(&fn->dev, "Failed to read object data. Code: %d.\n", |
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retval); |
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return IRQ_RETVAL(retval); |
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} |
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} |
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if (f12->data1) |
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rmi_f12_process_objects(f12, |
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&sensor->data_pkt[f12->data1_offset], valid_bytes); |
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input_mt_sync_frame(sensor->input); |
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return IRQ_HANDLED; |
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} |
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static int rmi_f12_write_control_regs(struct rmi_function *fn) |
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{ |
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int ret; |
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const struct rmi_register_desc_item *item; |
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struct rmi_device *rmi_dev = fn->rmi_dev; |
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struct f12_data *f12 = dev_get_drvdata(&fn->dev); |
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int control_size; |
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char buf[3]; |
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u16 control_offset = 0; |
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u8 subpacket_offset = 0; |
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if (f12->has_dribble |
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&& (f12->sensor.dribble != RMI_REG_STATE_DEFAULT)) { |
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item = rmi_get_register_desc_item(&f12->control_reg_desc, 20); |
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if (item) { |
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control_offset = rmi_register_desc_calc_reg_offset( |
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&f12->control_reg_desc, 20); |
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/* |
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* The byte containing the EnableDribble bit will be |
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* in either byte 0 or byte 2 of control 20. Depending |
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* on the existence of subpacket 0. If control 20 is |
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* larger then 3 bytes, just read the first 3. |
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*/ |
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control_size = min(item->reg_size, 3UL); |
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ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr |
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+ control_offset, buf, control_size); |
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if (ret) |
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return ret; |
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if (rmi_register_desc_has_subpacket(item, 0)) |
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subpacket_offset += 1; |
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switch (f12->sensor.dribble) { |
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case RMI_REG_STATE_OFF: |
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buf[subpacket_offset] &= ~BIT(2); |
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break; |
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case RMI_REG_STATE_ON: |
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buf[subpacket_offset] |= BIT(2); |
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break; |
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case RMI_REG_STATE_DEFAULT: |
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default: |
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break; |
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} |
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ret = rmi_write_block(rmi_dev, |
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fn->fd.control_base_addr + control_offset, |
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buf, control_size); |
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if (ret) |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static int rmi_f12_config(struct rmi_function *fn) |
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{ |
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struct rmi_driver *drv = fn->rmi_dev->driver; |
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struct f12_data *f12 = dev_get_drvdata(&fn->dev); |
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struct rmi_2d_sensor *sensor; |
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int ret; |
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sensor = &f12->sensor; |
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if (!sensor->report_abs) |
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drv->clear_irq_bits(fn->rmi_dev, f12->abs_mask); |
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else |
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drv->set_irq_bits(fn->rmi_dev, f12->abs_mask); |
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drv->clear_irq_bits(fn->rmi_dev, f12->rel_mask); |
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ret = rmi_f12_write_control_regs(fn); |
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if (ret) |
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dev_warn(&fn->dev, |
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"Failed to write F12 control registers: %d\n", ret); |
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return 0; |
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} |
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static int rmi_f12_probe(struct rmi_function *fn) |
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{ |
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struct f12_data *f12; |
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int ret; |
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struct rmi_device *rmi_dev = fn->rmi_dev; |
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char buf; |
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u16 query_addr = fn->fd.query_base_addr; |
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const struct rmi_register_desc_item *item; |
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struct rmi_2d_sensor *sensor; |
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struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); |
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struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev); |
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u16 data_offset = 0; |
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int mask_size; |
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s\n", __func__); |
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mask_size = BITS_TO_LONGS(drvdata->irq_count) * sizeof(unsigned long); |
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ret = rmi_read(fn->rmi_dev, query_addr, &buf); |
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if (ret < 0) { |
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dev_err(&fn->dev, "Failed to read general info register: %d\n", |
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ret); |
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return -ENODEV; |
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} |
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++query_addr; |
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if (!(buf & BIT(0))) { |
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dev_err(&fn->dev, |
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"Behavior of F12 without register descriptors is undefined.\n"); |
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return -ENODEV; |
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} |
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f12 = devm_kzalloc(&fn->dev, sizeof(struct f12_data) + mask_size * 2, |
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GFP_KERNEL); |
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if (!f12) |
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return -ENOMEM; |
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f12->abs_mask = (unsigned long *)((char *)f12 |
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+ sizeof(struct f12_data)); |
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f12->rel_mask = (unsigned long *)((char *)f12 |
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+ sizeof(struct f12_data) + mask_size); |
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set_bit(fn->irq_pos, f12->abs_mask); |
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set_bit(fn->irq_pos + 1, f12->rel_mask); |
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f12->has_dribble = !!(buf & BIT(3)); |
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if (fn->dev.of_node) { |
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ret = rmi_2d_sensor_of_probe(&fn->dev, &f12->sensor_pdata); |
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if (ret) |
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return ret; |
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} else { |
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f12->sensor_pdata = pdata->sensor_pdata; |
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} |
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ret = rmi_read_register_desc(rmi_dev, query_addr, |
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&f12->query_reg_desc); |
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if (ret) { |
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dev_err(&fn->dev, |
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"Failed to read the Query Register Descriptor: %d\n", |
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ret); |
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return ret; |
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} |
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query_addr += 3; |
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ret = rmi_read_register_desc(rmi_dev, query_addr, |
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&f12->control_reg_desc); |
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if (ret) { |
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dev_err(&fn->dev, |
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"Failed to read the Control Register Descriptor: %d\n", |
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ret); |
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return ret; |
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} |
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query_addr += 3; |
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ret = rmi_read_register_desc(rmi_dev, query_addr, |
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&f12->data_reg_desc); |
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if (ret) { |
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dev_err(&fn->dev, |
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"Failed to read the Data Register Descriptor: %d\n", |
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ret); |
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return ret; |
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} |
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query_addr += 3; |
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sensor = &f12->sensor; |
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sensor->fn = fn; |
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f12->data_addr = fn->fd.data_base_addr; |
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sensor->pkt_size = rmi_register_desc_calc_size(&f12->data_reg_desc); |
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sensor->axis_align = |
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f12->sensor_pdata.axis_align; |
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sensor->x_mm = f12->sensor_pdata.x_mm; |
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sensor->y_mm = f12->sensor_pdata.y_mm; |
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sensor->dribble = f12->sensor_pdata.dribble; |
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if (sensor->sensor_type == rmi_sensor_default) |
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sensor->sensor_type = |
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f12->sensor_pdata.sensor_type; |
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: data packet size: %d\n", __func__, |
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sensor->pkt_size); |
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sensor->data_pkt = devm_kzalloc(&fn->dev, sensor->pkt_size, GFP_KERNEL); |
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if (!sensor->data_pkt) |
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return -ENOMEM; |
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dev_set_drvdata(&fn->dev, f12); |
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ret = rmi_f12_read_sensor_tuning(f12); |
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if (ret) |
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return ret; |
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|
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/* |
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* Figure out what data is contained in the data registers. HID devices |
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* may have registers defined, but their data is not reported in the |
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* HID attention report. Registers which are not reported in the HID |
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* attention report check to see if the device is receiving data from |
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* HID attention reports. |
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*/ |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 0); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 1); |
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if (item) { |
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f12->data1 = item; |
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f12->data1_offset = data_offset; |
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data_offset += item->reg_size; |
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sensor->nbr_fingers = item->num_subpackets; |
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sensor->report_abs = 1; |
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sensor->attn_size += item->reg_size; |
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} |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 2); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 3); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 4); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 5); |
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if (item) { |
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f12->data5 = item; |
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f12->data5_offset = data_offset; |
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data_offset += item->reg_size; |
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sensor->attn_size += item->reg_size; |
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} |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 6); |
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if (item && !drvdata->attn_data.data) { |
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f12->data6 = item; |
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f12->data6_offset = data_offset; |
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data_offset += item->reg_size; |
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} |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 7); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 8); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 9); |
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if (item && !drvdata->attn_data.data) { |
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f12->data9 = item; |
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f12->data9_offset = data_offset; |
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data_offset += item->reg_size; |
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if (!sensor->report_abs) |
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sensor->report_rel = 1; |
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} |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 10); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 11); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 12); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 13); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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|
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 14); |
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if (item && !drvdata->attn_data.data) |
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data_offset += item->reg_size; |
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|
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item = rmi_get_register_desc_item(&f12->data_reg_desc, 15); |
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if (item && !drvdata->attn_data.data) { |
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f12->data15 = item; |
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f12->data15_offset = data_offset; |
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data_offset += item->reg_size; |
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} |
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|
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/* allocate the in-kernel tracking buffers */ |
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sensor->tracking_pos = devm_kcalloc(&fn->dev, |
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sensor->nbr_fingers, sizeof(struct input_mt_pos), |
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GFP_KERNEL); |
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sensor->tracking_slots = devm_kcalloc(&fn->dev, |
|
sensor->nbr_fingers, sizeof(int), GFP_KERNEL); |
|
sensor->objs = devm_kcalloc(&fn->dev, |
|
sensor->nbr_fingers, |
|
sizeof(struct rmi_2d_sensor_abs_object), |
|
GFP_KERNEL); |
|
if (!sensor->tracking_pos || !sensor->tracking_slots || !sensor->objs) |
|
return -ENOMEM; |
|
|
|
ret = rmi_2d_sensor_configure_input(fn, sensor); |
|
if (ret) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
struct rmi_function_handler rmi_f12_handler = { |
|
.driver = { |
|
.name = "rmi4_f12", |
|
}, |
|
.func = 0x12, |
|
.probe = rmi_f12_probe, |
|
.config = rmi_f12_config, |
|
.attention = rmi_f12_attention, |
|
};
|
|
|