2 * Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com>
3 * Copyright (c) 2013 Synaptics Incorporated
4 * Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com>
5 * Copyright (c) 2014 Red Hat, Inc
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
13 #include <linux/kernel.h>
14 #include <linux/hid.h>
15 #include <linux/input.h>
16 #include <linux/input/mt.h>
17 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/wait.h>
21 #include <linux/sched.h>
24 #define RMI_MOUSE_REPORT_ID 0x01 /* Mouse emulation Report */
25 #define RMI_WRITE_REPORT_ID 0x09 /* Output Report */
26 #define RMI_READ_ADDR_REPORT_ID 0x0a /* Output Report */
27 #define RMI_READ_DATA_REPORT_ID 0x0b /* Input Report */
28 #define RMI_ATTN_REPORT_ID 0x0c /* Input Report */
29 #define RMI_SET_RMI_MODE_REPORT_ID 0x0f /* Feature Report */
32 #define RMI_READ_REQUEST_PENDING BIT(0)
33 #define RMI_READ_DATA_PENDING BIT(1)
34 #define RMI_STARTED BIT(2)
38 RMI_MODE_ATTN_REPORTS = 1,
39 RMI_MODE_NO_PACKED_ATTN_REPORTS = 2,
43 unsigned page; /* page of the function */
44 u16 query_base_addr; /* base address for queries */
45 u16 command_base_addr; /* base address for commands */
46 u16 control_base_addr; /* base address for controls */
47 u16 data_base_addr; /* base address for datas */
48 unsigned int interrupt_base; /* cross-function interrupt number
49 * (uniq in the device)*/
50 unsigned int interrupt_count; /* number of interrupts */
51 unsigned int report_size; /* size of a report */
52 unsigned long irq_mask; /* mask of the interrupts
53 * (to be applied against ATTN IRQ) */
57 * struct rmi_data - stores information for hid communication
59 * @page_mutex: Locks current page to avoid changing pages in unexpected ways.
60 * @page: Keeps track of the current virtual page
62 * @wait: Used for waiting for read data
64 * @writeReport: output buffer when writing RMI registers
65 * @readReport: input buffer when reading RMI registers
67 * @input_report_size: size of an input report (advertised by HID)
68 * @output_report_size: size of an output report (advertised by HID)
70 * @flags: flags for the current device (started, reading, etc...)
72 * @f11: placeholder of internal RMI function F11 description
73 * @f30: placeholder of internal RMI function F30 description
75 * @max_fingers: maximum finger count reported by the device
76 * @max_x: maximum x value reported by the device
77 * @max_y: maximum y value reported by the device
79 * @gpio_led_count: count of GPIOs + LEDs reported by F30
80 * @button_count: actual physical buttons count
81 * @button_mask: button mask used to decode GPIO ATTN reports
82 * @button_state_mask: pull state of the buttons
84 * @input: pointer to the kernel input device
86 * @reset_work: worker which will be called in case of a mouse report
87 * @hdev: pointer to the struct hid_device
90 struct mutex page_mutex;
93 wait_queue_head_t wait;
98 int input_report_size;
99 int output_report_size;
103 struct rmi_function f11;
104 struct rmi_function f30;
106 unsigned int max_fingers;
109 unsigned int x_size_mm;
110 unsigned int y_size_mm;
112 unsigned int gpio_led_count;
113 unsigned int button_count;
114 unsigned long button_mask;
115 unsigned long button_state_mask;
117 struct input_dev *input;
119 struct work_struct reset_work;
120 struct hid_device *hdev;
123 #define RMI_PAGE(addr) (((addr) >> 8) & 0xff)
125 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len);
128 * rmi_set_page - Set RMI page
129 * @hdev: The pointer to the hid_device struct
130 * @page: The new page address.
132 * RMI devices have 16-bit addressing, but some of the physical
133 * implementations (like SMBus) only have 8-bit addressing. So RMI implements
134 * a page address at 0xff of every page so we can reliable page addresses
135 * every 256 registers.
137 * The page_mutex lock must be held when this function is entered.
139 * Returns zero on success, non-zero on failure.
141 static int rmi_set_page(struct hid_device *hdev, u8 page)
143 struct rmi_data *data = hid_get_drvdata(hdev);
146 data->writeReport[0] = RMI_WRITE_REPORT_ID;
147 data->writeReport[1] = 1;
148 data->writeReport[2] = 0xFF;
149 data->writeReport[4] = page;
151 retval = rmi_write_report(hdev, data->writeReport,
152 data->output_report_size);
153 if (retval != data->output_report_size) {
155 "%s: set page failed: %d.", __func__, retval);
163 static int rmi_set_mode(struct hid_device *hdev, u8 mode)
166 u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode};
168 ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, txbuf,
169 sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
171 dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode,
179 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len)
183 ret = hid_hw_output_report(hdev, (void *)report, len);
185 dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret);
192 static int rmi_read_block(struct hid_device *hdev, u16 addr, void *buf,
195 struct rmi_data *data = hid_get_drvdata(hdev);
200 int read_input_count;
202 mutex_lock(&data->page_mutex);
204 if (RMI_PAGE(addr) != data->page) {
205 ret = rmi_set_page(hdev, RMI_PAGE(addr));
210 for (retries = 5; retries > 0; retries--) {
211 data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
212 data->writeReport[1] = 0; /* old 1 byte read count */
213 data->writeReport[2] = addr & 0xFF;
214 data->writeReport[3] = (addr >> 8) & 0xFF;
215 data->writeReport[4] = len & 0xFF;
216 data->writeReport[5] = (len >> 8) & 0xFF;
218 set_bit(RMI_READ_REQUEST_PENDING, &data->flags);
220 ret = rmi_write_report(hdev, data->writeReport,
221 data->output_report_size);
222 if (ret != data->output_report_size) {
223 clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
225 "failed to write request output report (%d)\n",
232 while (bytes_read < len) {
233 if (!wait_event_timeout(data->wait,
234 test_bit(RMI_READ_DATA_PENDING, &data->flags),
235 msecs_to_jiffies(1000))) {
236 hid_warn(hdev, "%s: timeout elapsed\n",
242 read_input_count = data->readReport[1];
243 memcpy(buf + bytes_read, &data->readReport[2],
244 read_input_count < bytes_needed ?
245 read_input_count : bytes_needed);
247 bytes_read += read_input_count;
248 bytes_needed -= read_input_count;
249 clear_bit(RMI_READ_DATA_PENDING, &data->flags);
259 clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
260 mutex_unlock(&data->page_mutex);
264 static inline int rmi_read(struct hid_device *hdev, u16 addr, void *buf)
266 return rmi_read_block(hdev, addr, buf, 1);
269 static void rmi_f11_process_touch(struct rmi_data *hdata, int slot,
270 u8 finger_state, u8 *touch_data)
273 int wide, major, minor;
276 input_mt_slot(hdata->input, slot);
277 input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER,
278 finger_state == 0x01);
279 if (finger_state == 0x01) {
280 x = (touch_data[0] << 4) | (touch_data[2] & 0x0F);
281 y = (touch_data[1] << 4) | (touch_data[2] >> 4);
282 wx = touch_data[3] & 0x0F;
283 wy = touch_data[3] >> 4;
290 y = hdata->max_y - y;
292 input_event(hdata->input, EV_ABS, ABS_MT_POSITION_X, x);
293 input_event(hdata->input, EV_ABS, ABS_MT_POSITION_Y, y);
294 input_event(hdata->input, EV_ABS, ABS_MT_ORIENTATION, wide);
295 input_event(hdata->input, EV_ABS, ABS_MT_PRESSURE, z);
296 input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
297 input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
301 static void rmi_reset_work(struct work_struct *work)
303 struct rmi_data *hdata = container_of(work, struct rmi_data,
306 /* switch the device to RMI if we receive a generic mouse report */
307 rmi_set_mode(hdata->hdev, RMI_MODE_ATTN_REPORTS);
310 static inline int rmi_schedule_reset(struct hid_device *hdev)
312 struct rmi_data *hdata = hid_get_drvdata(hdev);
313 return schedule_work(&hdata->reset_work);
316 static int rmi_f11_input_event(struct hid_device *hdev, u8 irq, u8 *data,
319 struct rmi_data *hdata = hid_get_drvdata(hdev);
323 if (size < hdata->f11.report_size)
326 if (!(irq & hdata->f11.irq_mask))
329 offset = (hdata->max_fingers >> 2) + 1;
330 for (i = 0; i < hdata->max_fingers; i++) {
331 int fs_byte_position = i >> 2;
332 int fs_bit_position = (i & 0x3) << 1;
333 int finger_state = (data[fs_byte_position] >> fs_bit_position) &
336 rmi_f11_process_touch(hdata, i, finger_state,
337 &data[offset + 5 * i]);
339 input_mt_sync_frame(hdata->input);
340 input_sync(hdata->input);
341 return hdata->f11.report_size;
344 static int rmi_f30_input_event(struct hid_device *hdev, u8 irq, u8 *data,
347 struct rmi_data *hdata = hid_get_drvdata(hdev);
352 if (!(irq & hdata->f30.irq_mask))
355 for (i = 0; i < hdata->gpio_led_count; i++) {
356 if (test_bit(i, &hdata->button_mask)) {
357 value = (data[i / 8] >> (i & 0x07)) & BIT(0);
358 if (test_bit(i, &hdata->button_state_mask))
360 input_event(hdata->input, EV_KEY, BTN_LEFT + button++,
364 return hdata->f30.report_size;
367 static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
369 struct rmi_data *hdata = hid_get_drvdata(hdev);
370 unsigned long irq_mask = 0;
373 if (!(test_bit(RMI_STARTED, &hdata->flags)))
376 irq_mask |= hdata->f11.irq_mask;
377 irq_mask |= hdata->f30.irq_mask;
379 if (data[1] & ~irq_mask)
380 hid_dbg(hdev, "unknown intr source:%02lx %s:%d\n",
381 data[1] & ~irq_mask, __FILE__, __LINE__);
383 if (hdata->f11.interrupt_base < hdata->f30.interrupt_base) {
384 index += rmi_f11_input_event(hdev, data[1], &data[index],
386 index += rmi_f30_input_event(hdev, data[1], &data[index],
389 index += rmi_f30_input_event(hdev, data[1], &data[index],
391 index += rmi_f11_input_event(hdev, data[1], &data[index],
398 static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size)
400 struct rmi_data *hdata = hid_get_drvdata(hdev);
402 if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) {
403 hid_dbg(hdev, "no read request pending\n");
407 memcpy(hdata->readReport, data, size < hdata->input_report_size ?
408 size : hdata->input_report_size);
409 set_bit(RMI_READ_DATA_PENDING, &hdata->flags);
410 wake_up(&hdata->wait);
415 static int rmi_raw_event(struct hid_device *hdev,
416 struct hid_report *report, u8 *data, int size)
419 case RMI_READ_DATA_REPORT_ID:
420 return rmi_read_data_event(hdev, data, size);
421 case RMI_ATTN_REPORT_ID:
422 return rmi_input_event(hdev, data, size);
423 case RMI_MOUSE_REPORT_ID:
424 rmi_schedule_reset(hdev);
432 static int rmi_post_reset(struct hid_device *hdev)
434 return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
437 static int rmi_post_resume(struct hid_device *hdev)
439 return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
441 #endif /* CONFIG_PM */
443 #define RMI4_MAX_PAGE 0xff
444 #define RMI4_PAGE_SIZE 0x0100
446 #define PDT_START_SCAN_LOCATION 0x00e9
447 #define PDT_END_SCAN_LOCATION 0x0005
448 #define RMI4_END_OF_PDT(id) ((id) == 0x00 || (id) == 0xff)
451 u8 query_base_addr:8;
452 u8 command_base_addr:8;
453 u8 control_base_addr:8;
455 u8 interrupt_source_count:3;
457 u8 function_version:2;
459 u8 function_number:8;
460 } __attribute__((__packed__));
462 static inline unsigned long rmi_gen_mask(unsigned irq_base, unsigned irq_count)
464 return GENMASK(irq_count + irq_base - 1, irq_base);
467 static void rmi_register_function(struct rmi_data *data,
468 struct pdt_entry *pdt_entry, int page, unsigned interrupt_count)
470 struct rmi_function *f = NULL;
471 u16 page_base = page << 8;
473 switch (pdt_entry->function_number) {
484 f->query_base_addr = page_base | pdt_entry->query_base_addr;
485 f->command_base_addr = page_base | pdt_entry->command_base_addr;
486 f->control_base_addr = page_base | pdt_entry->control_base_addr;
487 f->data_base_addr = page_base | pdt_entry->data_base_addr;
488 f->interrupt_base = interrupt_count;
489 f->interrupt_count = pdt_entry->interrupt_source_count;
490 f->irq_mask = rmi_gen_mask(f->interrupt_base,
495 static int rmi_scan_pdt(struct hid_device *hdev)
497 struct rmi_data *data = hid_get_drvdata(hdev);
498 struct pdt_entry entry;
500 bool page_has_function;
504 u16 page_start, pdt_start , pdt_end;
506 hid_info(hdev, "Scanning PDT...\n");
508 for (page = 0; (page <= RMI4_MAX_PAGE); page++) {
509 page_start = RMI4_PAGE_SIZE * page;
510 pdt_start = page_start + PDT_START_SCAN_LOCATION;
511 pdt_end = page_start + PDT_END_SCAN_LOCATION;
513 page_has_function = false;
514 for (i = pdt_start; i >= pdt_end; i -= sizeof(entry)) {
515 retval = rmi_read_block(hdev, i, &entry, sizeof(entry));
518 "Read of PDT entry at %#06x failed.\n",
523 if (RMI4_END_OF_PDT(entry.function_number))
526 page_has_function = true;
528 hid_info(hdev, "Found F%02X on page %#04x\n",
529 entry.function_number, page);
531 rmi_register_function(data, &entry, page, interrupt);
532 interrupt += entry.interrupt_source_count;
535 if (!page_has_function)
539 hid_info(hdev, "%s: Done with PDT scan.\n", __func__);
546 static int rmi_populate_f11(struct hid_device *hdev)
548 struct rmi_data *data = hid_get_drvdata(hdev);
552 bool has_query10 = false;
555 bool has_physical_props;
558 unsigned x_size, y_size;
561 if (!data->f11.query_base_addr) {
562 hid_err(hdev, "No 2D sensor found, giving up.\n");
566 /* query 0 contains some useful information */
567 ret = rmi_read(hdev, data->f11.query_base_addr, buf);
569 hid_err(hdev, "can not get query 0: %d.\n", ret);
572 has_query9 = !!(buf[0] & BIT(3));
573 has_query11 = !!(buf[0] & BIT(4));
574 has_query12 = !!(buf[0] & BIT(5));
576 /* query 1 to get the max number of fingers */
577 ret = rmi_read(hdev, data->f11.query_base_addr + 1, buf);
579 hid_err(hdev, "can not get NumberOfFingers: %d.\n", ret);
582 data->max_fingers = (buf[0] & 0x07) + 1;
583 if (data->max_fingers > 5)
584 data->max_fingers = 10;
586 data->f11.report_size = data->max_fingers * 5 +
587 DIV_ROUND_UP(data->max_fingers, 4);
589 if (!(buf[0] & BIT(4))) {
590 hid_err(hdev, "No absolute events, giving up.\n");
594 has_rel = !!(buf[0] & BIT(3));
595 has_gestures = !!(buf[0] & BIT(5));
598 /* query 8 to find out if query 10 exists */
599 ret = rmi_read(hdev, data->f11.query_base_addr + 8, buf);
601 hid_err(hdev, "can not read gesture information: %d.\n",
605 has_query10 = !!(buf[0] & BIT(2));
609 * At least 4 queries are guaranteed to be present in F11
610 * +1 for query 5 which is present since absolute events are
611 * reported and +1 for query 12.
616 ++query12_offset; /* query 6 is present */
619 query12_offset += 2; /* query 7 and 8 are present */
630 /* query 12 to know if the physical properties are reported */
632 ret = rmi_read(hdev, data->f11.query_base_addr
633 + query12_offset, buf);
635 hid_err(hdev, "can not get query 12: %d.\n", ret);
638 has_physical_props = !!(buf[0] & BIT(5));
640 if (has_physical_props) {
641 ret = rmi_read_block(hdev,
642 data->f11.query_base_addr
643 + query12_offset + 1, buf, 4);
645 hid_err(hdev, "can not read query 15-18: %d.\n",
650 x_size = buf[0] | (buf[1] << 8);
651 y_size = buf[2] | (buf[3] << 8);
653 data->x_size_mm = DIV_ROUND_CLOSEST(x_size, 10);
654 data->y_size_mm = DIV_ROUND_CLOSEST(y_size, 10);
656 hid_info(hdev, "%s: size in mm: %d x %d\n",
657 __func__, data->x_size_mm, data->y_size_mm);
662 * retrieve the ctrl registers
663 * the ctrl register has a size of 20 but a fw bug split it into 16 + 4,
664 * and there is no way to know if the first 20 bytes are here or not.
665 * We use only the first 10 bytes, so get only them.
667 ret = rmi_read_block(hdev, data->f11.control_base_addr, buf, 10);
669 hid_err(hdev, "can not read ctrl block of size 10: %d.\n", ret);
673 data->max_x = buf[6] | (buf[7] << 8);
674 data->max_y = buf[8] | (buf[9] << 8);
679 static int rmi_populate_f30(struct hid_device *hdev)
681 struct rmi_data *data = hid_get_drvdata(hdev);
684 bool has_gpio, has_led;
685 unsigned bytes_per_ctrl;
690 /* function F30 is for physical buttons */
691 if (!data->f30.query_base_addr) {
692 hid_err(hdev, "No GPIO/LEDs found, giving up.\n");
696 ret = rmi_read_block(hdev, data->f30.query_base_addr, buf, 2);
698 hid_err(hdev, "can not get F30 query registers: %d.\n", ret);
702 has_gpio = !!(buf[0] & BIT(3));
703 has_led = !!(buf[0] & BIT(2));
704 data->gpio_led_count = buf[1] & 0x1f;
706 /* retrieve ctrl 2 & 3 registers */
707 bytes_per_ctrl = (data->gpio_led_count + 7) / 8;
708 /* Ctrl0 is present only if both has_gpio and has_led are set*/
709 ctrl2_addr = (has_gpio && has_led) ? bytes_per_ctrl : 0;
710 /* Ctrl1 is always be present */
711 ctrl2_addr += bytes_per_ctrl;
712 ctrl2_3_length = 2 * bytes_per_ctrl;
714 data->f30.report_size = bytes_per_ctrl;
716 ret = rmi_read_block(hdev, data->f30.control_base_addr + ctrl2_addr,
717 buf, ctrl2_3_length);
719 hid_err(hdev, "can not read ctrl 2&3 block of size %d: %d.\n",
720 ctrl2_3_length, ret);
724 for (i = 0; i < data->gpio_led_count; i++) {
725 int byte_position = i >> 3;
726 int bit_position = i & 0x07;
727 u8 dir_byte = buf[byte_position];
728 u8 data_byte = buf[byte_position + bytes_per_ctrl];
729 bool dir = (dir_byte >> bit_position) & BIT(0);
730 bool dat = (data_byte >> bit_position) & BIT(0);
735 /* actual buttons have pull up resistor */
736 data->button_count++;
737 set_bit(i, &data->button_mask);
738 set_bit(i, &data->button_state_mask);
747 static int rmi_populate(struct hid_device *hdev)
751 ret = rmi_scan_pdt(hdev);
753 hid_err(hdev, "PDT scan failed with code %d.\n", ret);
757 ret = rmi_populate_f11(hdev);
759 hid_err(hdev, "Error while initializing F11 (%d).\n", ret);
763 ret = rmi_populate_f30(hdev);
765 hid_warn(hdev, "Error while initializing F30 (%d).\n", ret);
770 static void rmi_input_configured(struct hid_device *hdev, struct hid_input *hi)
772 struct rmi_data *data = hid_get_drvdata(hdev);
773 struct input_dev *input = hi->input;
779 hid_dbg(hdev, "Opening low level driver\n");
780 ret = hid_hw_open(hdev);
784 /* Allow incoming hid reports */
785 hid_device_io_start(hdev);
787 ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
789 dev_err(&hdev->dev, "failed to set rmi mode\n");
793 ret = rmi_set_page(hdev, 0);
795 dev_err(&hdev->dev, "failed to set page select to 0.\n");
799 ret = rmi_populate(hdev);
803 __set_bit(EV_ABS, input->evbit);
804 input_set_abs_params(input, ABS_MT_POSITION_X, 1, data->max_x, 0, 0);
805 input_set_abs_params(input, ABS_MT_POSITION_Y, 1, data->max_y, 0, 0);
807 if (data->x_size_mm && data->y_size_mm) {
808 res_x = (data->max_x - 1) / data->x_size_mm;
809 res_y = (data->max_y - 1) / data->y_size_mm;
811 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
812 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
815 input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
816 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
817 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
818 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
820 input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
822 if (data->button_count) {
823 __set_bit(EV_KEY, input->evbit);
824 for (i = 0; i < data->button_count; i++)
825 __set_bit(BTN_LEFT + i, input->keybit);
827 if (data->button_count == 1)
828 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
831 set_bit(RMI_STARTED, &data->flags);
834 hid_device_io_stop(hdev);
838 static int rmi_input_mapping(struct hid_device *hdev,
839 struct hid_input *hi, struct hid_field *field,
840 struct hid_usage *usage, unsigned long **bit, int *max)
842 /* we want to make HID ignore the advertised HID collection */
846 static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
848 struct rmi_data *data = NULL;
851 struct hid_report *input_report;
852 struct hid_report *output_report;
854 data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL);
858 INIT_WORK(&data->reset_work, rmi_reset_work);
861 hid_set_drvdata(hdev, data);
863 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
865 ret = hid_parse(hdev);
867 hid_err(hdev, "parse failed\n");
871 input_report = hdev->report_enum[HID_INPUT_REPORT]
872 .report_id_hash[RMI_ATTN_REPORT_ID];
874 hid_err(hdev, "device does not have expected input report\n");
879 data->input_report_size = (input_report->size >> 3) + 1 /* report id */;
881 output_report = hdev->report_enum[HID_OUTPUT_REPORT]
882 .report_id_hash[RMI_WRITE_REPORT_ID];
883 if (!output_report) {
884 hid_err(hdev, "device does not have expected output report\n");
889 data->output_report_size = (output_report->size >> 3)
892 alloc_size = data->output_report_size + data->input_report_size;
894 data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL);
895 if (!data->writeReport) {
900 data->readReport = data->writeReport + data->output_report_size;
902 init_waitqueue_head(&data->wait);
904 mutex_init(&data->page_mutex);
906 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
908 hid_err(hdev, "hw start failed\n");
912 if (!test_bit(RMI_STARTED, &data->flags)) {
920 static void rmi_remove(struct hid_device *hdev)
922 struct rmi_data *hdata = hid_get_drvdata(hdev);
924 clear_bit(RMI_STARTED, &hdata->flags);
929 static const struct hid_device_id rmi_id[] = {
930 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) },
933 MODULE_DEVICE_TABLE(hid, rmi_id);
935 static struct hid_driver rmi_driver = {
939 .remove = rmi_remove,
940 .raw_event = rmi_raw_event,
941 .input_mapping = rmi_input_mapping,
942 .input_configured = rmi_input_configured,
944 .resume = rmi_post_resume,
945 .reset_resume = rmi_post_reset,
949 module_hid_driver(rmi_driver);
951 MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>");
952 MODULE_DESCRIPTION("RMI HID driver");
953 MODULE_LICENSE("GPL");