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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/input/mouse/elan_i2c_i2c.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Elan I2C/SMBus Touchpad driver - I2C interface
34  *
....@@ -9,10 +10,6 @@
910  * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
1011  * copyright (c) 2011-2012 Google, Inc.
1112  *
12
- * This program is free software; you can redistribute it and/or modify it
13
- * under the terms of the GNU General Public License version 2 as published
14
- * by the Free Software Foundation.
15
- *
1613  * Trademarks are the property of their respective owners.
1714  */
1815 
....@@ -22,6 +19,7 @@
2219 #include <linux/interrupt.h>
2320 #include <linux/jiffies.h>
2421 #include <linux/kernel.h>
22
+#include <linux/slab.h>
2523 #include <linux/sched.h>
2624 #include <asm/unaligned.h>
2725 
....@@ -46,6 +44,8 @@
4644 #define ETP_I2C_RESOLUTION_CMD		0x0108
4745 #define ETP_I2C_PRESSURE_CMD		0x010A
4846 #define ETP_I2C_IAP_VERSION_CMD		0x0110
47
+#define ETP_I2C_IC_TYPE_P0_CMD		0x0110
48
+#define ETP_I2C_IAP_VERSION_P0_CMD	0x0111
4949 #define ETP_I2C_SET_CMD			0x0300
5050 #define ETP_I2C_POWER_CMD		0x0307
5151 #define ETP_I2C_FW_CHECKSUM_CMD		0x030F
....@@ -56,8 +56,12 @@
5656 #define ETP_I2C_CALIBRATE_CMD		0x0316
5757 #define ETP_I2C_MAX_BASELINE_CMD	0x0317
5858 #define ETP_I2C_MIN_BASELINE_CMD	0x0318
59
+#define ETP_I2C_IAP_TYPE_REG		0x0040
60
+#define ETP_I2C_IAP_TYPE_CMD		0x0304
5961 
6062 #define ETP_I2C_REPORT_LEN		34
63
+#define ETP_I2C_REPORT_LEN_ID2		39
64
+#define ETP_I2C_REPORT_MAX_LEN		39
6165 #define ETP_I2C_DESC_LENGTH		30
6266 #define ETP_I2C_REPORT_DESC_LENGTH	158
6367 #define ETP_I2C_INF_LENGTH		2
....@@ -252,56 +256,52 @@
252256 		dev_err(&client->dev, "failed to get pattern: %d\n", error);
253257 		return error;
254258 	}
255
-	*pattern = val[1];
259
+
260
+	/*
261
+	 * Not all versions of firmware implement "get pattern" command.
262
+	 * When this command is not implemented the device will respond
263
+	 * with 0xFF 0xFF, which we will treat as "old" pattern 0.
264
+	 */
265
+	*pattern = val[0] == 0xFF && val[1] == 0xFF ? 0 : val[1];
256266 
257267 	return 0;
258268 }
259269 
260270 static int elan_i2c_get_version(struct i2c_client *client,
261
-				bool iap, u8 *version)
271
+				u8 pattern, bool iap, u8 *version)
262272 {
263273 	int error;
264
-	u8 pattern_ver;
274
+	u16 cmd;
265275 	u8 val[3];
266276 
267
-	error = elan_i2c_get_pattern(client, &pattern_ver);
268
-	if (error) {
269
-		dev_err(&client->dev, "failed to get pattern version\n");
270
-		return error;
271
-	}
277
+	if (!iap)
278
+		cmd = ETP_I2C_FW_VERSION_CMD;
279
+	else if (pattern == 0)
280
+		cmd = ETP_I2C_IAP_VERSION_P0_CMD;
281
+	else
282
+		cmd = ETP_I2C_IAP_VERSION_CMD;
272283 
273
-	error = elan_i2c_read_cmd(client,
274
-				  iap ? ETP_I2C_IAP_VERSION_CMD :
275
-					ETP_I2C_FW_VERSION_CMD,
276
-				  val);
284
+	error = elan_i2c_read_cmd(client, cmd, val);
277285 	if (error) {
278286 		dev_err(&client->dev, "failed to get %s version: %d\n",
279287 			iap ? "IAP" : "FW", error);
280288 		return error;
281289 	}
282290 
283
-	if (pattern_ver == 0x01)
291
+	if (pattern >= 0x01)
284292 		*version = iap ? val[1] : val[0];
285293 	else
286294 		*version = val[0];
287295 	return 0;
288296 }
289297 
290
-static int elan_i2c_get_sm_version(struct i2c_client *client,
291
-				   u16 *ic_type, u8 *version,
292
-				   u8 *clickpad)
298
+static int elan_i2c_get_sm_version(struct i2c_client *client, u8 pattern,
299
+				   u16 *ic_type, u8 *version, u8 *clickpad)
293300 {
294301 	int error;
295
-	u8 pattern_ver;
296302 	u8 val[3];
297303 
298
-	error = elan_i2c_get_pattern(client, &pattern_ver);
299
-	if (error) {
300
-		dev_err(&client->dev, "failed to get pattern version\n");
301
-		return error;
302
-	}
303
-
304
-	if (pattern_ver == 0x01) {
304
+	if (pattern >= 0x01) {
305305 		error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_CMD, val);
306306 		if (error) {
307307 			dev_err(&client->dev, "failed to get ic type: %d\n",
....@@ -327,7 +327,14 @@
327327 			return error;
328328 		}
329329 		*version = val[0];
330
-		*ic_type = val[1];
330
+
331
+		error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_P0_CMD, val);
332
+		if (error) {
333
+			dev_err(&client->dev, "failed to get ic type: %d\n",
334
+				error);
335
+			return error;
336
+		}
337
+		*ic_type = val[0];
331338 
332339 		error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
333340 					  val);
....@@ -389,7 +396,7 @@
389396 		return error;
390397 	}
391398 
392
-	*max_x = le16_to_cpup((__le16 *)val) & 0x0fff;
399
+	*max_x = le16_to_cpup((__le16 *)val);
393400 
394401 	error = elan_i2c_read_cmd(client, ETP_I2C_MAX_Y_AXIS_CMD, val);
395402 	if (error) {
....@@ -397,7 +404,7 @@
397404 		return error;
398405 	}
399406 
400
-	*max_y = le16_to_cpup((__le16 *)val) & 0x0fff;
407
+	*max_y = le16_to_cpup((__le16 *)val);
401408 
402409 	return 0;
403410 }
....@@ -510,7 +517,43 @@
510517 	return 0;
511518 }
512519 
513
-static int elan_i2c_prepare_fw_update(struct i2c_client *client)
520
+static int elan_read_write_iap_type(struct i2c_client *client, u16 fw_page_size)
521
+{
522
+	int error;
523
+	u16 constant;
524
+	u8 val[3];
525
+	int retry = 3;
526
+
527
+	do {
528
+		error = elan_i2c_write_cmd(client, ETP_I2C_IAP_TYPE_CMD,
529
+					   fw_page_size / 2);
530
+		if (error) {
531
+			dev_err(&client->dev,
532
+				"cannot write iap type: %d\n", error);
533
+			return error;
534
+		}
535
+
536
+		error = elan_i2c_read_cmd(client, ETP_I2C_IAP_TYPE_CMD, val);
537
+		if (error) {
538
+			dev_err(&client->dev,
539
+				"failed to read iap type register: %d\n",
540
+				error);
541
+			return error;
542
+		}
543
+		constant = le16_to_cpup((__le16 *)val);
544
+		dev_dbg(&client->dev, "iap type reg: 0x%04x\n", constant);
545
+
546
+		if (constant == fw_page_size / 2)
547
+			return 0;
548
+
549
+	} while (--retry > 0);
550
+
551
+	dev_err(&client->dev, "cannot set iap type\n");
552
+	return -EIO;
553
+}
554
+
555
+static int elan_i2c_prepare_fw_update(struct i2c_client *client, u16 ic_type,
556
+				      u8 iap_version, u16 fw_page_size)
514557 {
515558 	struct device *dev = &client->dev;
516559 	int error;
....@@ -550,6 +593,12 @@
550593 		return -EIO;
551594 	}
552595 
596
+	if (ic_type >= 0x0D && iap_version >= 1) {
597
+		error = elan_read_write_iap_type(client, fw_page_size);
598
+		if (error)
599
+			return error;
600
+	}
601
+
553602 	/* Set flash key again */
554603 	error = elan_i2c_set_flash_key(client);
555604 	if (error)
....@@ -575,57 +624,64 @@
575624 	return 0;
576625 }
577626 
578
-static int elan_i2c_write_fw_block(struct i2c_client *client,
627
+static int elan_i2c_write_fw_block(struct i2c_client *client, u16 fw_page_size,
579628 				   const u8 *page, u16 checksum, int idx)
580629 {
581630 	struct device *dev = &client->dev;
582
-	u8 page_store[ETP_FW_PAGE_SIZE + 4];
631
+	u8 *page_store;
583632 	u8 val[3];
584633 	u16 result;
585634 	int ret, error;
586635 
636
+	page_store = kmalloc(fw_page_size + 4, GFP_KERNEL);
637
+	if (!page_store)
638
+		return -ENOMEM;
639
+
587640 	page_store[0] = ETP_I2C_IAP_REG_L;
588641 	page_store[1] = ETP_I2C_IAP_REG_H;
589
-	memcpy(&page_store[2], page, ETP_FW_PAGE_SIZE);
642
+	memcpy(&page_store[2], page, fw_page_size);
590643 	/* recode checksum at last two bytes */
591
-	put_unaligned_le16(checksum, &page_store[ETP_FW_PAGE_SIZE + 2]);
644
+	put_unaligned_le16(checksum, &page_store[fw_page_size + 2]);
592645 
593
-	ret = i2c_master_send(client, page_store, sizeof(page_store));
594
-	if (ret != sizeof(page_store)) {
646
+	ret = i2c_master_send(client, page_store, fw_page_size + 4);
647
+	if (ret != fw_page_size + 4) {
595648 		error = ret < 0 ? ret : -EIO;
596649 		dev_err(dev, "Failed to write page %d: %d\n", idx, error);
597
-		return error;
650
+		goto exit;
598651 	}
599652 
600653 	/* Wait for F/W to update one page ROM data. */
601
-	msleep(35);
654
+	msleep(fw_page_size == ETP_FW_PAGE_SIZE_512 ? 50 : 35);
602655 
603656 	error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
604657 	if (error) {
605658 		dev_err(dev, "Failed to read IAP write result: %d\n", error);
606
-		return error;
659
+		goto exit;
607660 	}
608661 
609662 	result = le16_to_cpup((__le16 *)val);
610663 	if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
611664 		dev_err(dev, "IAP reports failed write: %04hx\n",
612665 			result);
613
-		return -EIO;
666
+		error = -EIO;
667
+		goto exit;
614668 	}
615669 
616
-	return 0;
670
+exit:
671
+	kfree(page_store);
672
+	return error;
617673 }
618674 
619675 static int elan_i2c_finish_fw_update(struct i2c_client *client,
620676 				     struct completion *completion)
621677 {
622678 	struct device *dev = &client->dev;
623
-	int error;
679
+	int error = 0;
624680 	int len;
625
-	u8 buffer[ETP_I2C_REPORT_LEN];
681
+	u8 buffer[ETP_I2C_REPORT_MAX_LEN];
626682 
627
-	len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_LEN);
628
-	if (len != ETP_I2C_REPORT_LEN) {
683
+	len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_MAX_LEN);
684
+	if (len <= 0) {
629685 		error = len < 0 ? len : -EIO;
630686 		dev_warn(dev, "failed to read I2C data after FW WDT reset: %d (%d)\n",
631687 			error, len);
....@@ -659,20 +715,31 @@
659715 	return 0;
660716 }
661717 
662
-static int elan_i2c_get_report(struct i2c_client *client, u8 *report)
718
+static int elan_i2c_get_report_features(struct i2c_client *client, u8 pattern,
719
+					unsigned int *features,
720
+					unsigned int *report_len)
721
+{
722
+	*features = ETP_FEATURE_REPORT_MK;
723
+	*report_len = pattern <= 0x01 ?
724
+			ETP_I2C_REPORT_LEN : ETP_I2C_REPORT_LEN_ID2;
725
+	return 0;
726
+}
727
+
728
+static int elan_i2c_get_report(struct i2c_client *client,
729
+			       u8 *report, unsigned int report_len)
663730 {
664731 	int len;
665732 
666
-	len = i2c_master_recv(client, report, ETP_I2C_REPORT_LEN);
733
+	len = i2c_master_recv(client, report, report_len);
667734 	if (len < 0) {
668735 		dev_err(&client->dev, "failed to read report data: %d\n", len);
669736 		return len;
670737 	}
671738 
672
-	if (len != ETP_I2C_REPORT_LEN) {
739
+	if (len != report_len) {
673740 		dev_err(&client->dev,
674741 			"wrong report length (%d vs %d expected)\n",
675
-			len, ETP_I2C_REPORT_LEN);
742
+			len, report_len);
676743 		return -EIO;
677744 	}
678745 
....@@ -709,5 +776,6 @@
709776 
710777 	.get_pattern		= elan_i2c_get_pattern,
711778 
779
+	.get_report_features	= elan_i2c_get_report_features,
712780 	.get_report		= elan_i2c_get_report,
713781 };