1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
26696777cSDuson Lin /*
36696777cSDuson Lin * Elan I2C/SMBus Touchpad driver - I2C interface
46696777cSDuson Lin *
56696777cSDuson Lin * Copyright (c) 2013 ELAN Microelectronics Corp.
66696777cSDuson Lin *
76696777cSDuson Lin * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw>
86696777cSDuson Lin *
96696777cSDuson Lin * Based on cyapa driver:
106696777cSDuson Lin * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
116696777cSDuson Lin * copyright (c) 2011-2012 Google, Inc.
126696777cSDuson Lin *
136696777cSDuson Lin * Trademarks are the property of their respective owners.
146696777cSDuson Lin */
156696777cSDuson Lin
166696777cSDuson Lin #include <linux/completion.h>
176696777cSDuson Lin #include <linux/delay.h>
186696777cSDuson Lin #include <linux/i2c.h>
196696777cSDuson Lin #include <linux/interrupt.h>
206696777cSDuson Lin #include <linux/jiffies.h>
216696777cSDuson Lin #include <linux/kernel.h>
22059d6c2dSJingle Wu #include <linux/slab.h>
236696777cSDuson Lin #include <linux/sched.h>
246696777cSDuson Lin #include <asm/unaligned.h>
256696777cSDuson Lin
266696777cSDuson Lin #include "elan_i2c.h"
276696777cSDuson Lin
286696777cSDuson Lin /* Elan i2c commands */
296696777cSDuson Lin #define ETP_I2C_RESET 0x0100
306696777cSDuson Lin #define ETP_I2C_WAKE_UP 0x0800
316696777cSDuson Lin #define ETP_I2C_SLEEP 0x0801
326696777cSDuson Lin #define ETP_I2C_DESC_CMD 0x0001
336696777cSDuson Lin #define ETP_I2C_REPORT_DESC_CMD 0x0002
346696777cSDuson Lin #define ETP_I2C_STAND_CMD 0x0005
35a2eaf299SKT Liao #define ETP_I2C_PATTERN_CMD 0x0100
366696777cSDuson Lin #define ETP_I2C_UNIQUEID_CMD 0x0101
376696777cSDuson Lin #define ETP_I2C_FW_VERSION_CMD 0x0102
38a2eaf299SKT Liao #define ETP_I2C_IC_TYPE_CMD 0x0103
39a2eaf299SKT Liao #define ETP_I2C_OSM_VERSION_CMD 0x0103
40a2eaf299SKT Liao #define ETP_I2C_NSM_VERSION_CMD 0x0104
416696777cSDuson Lin #define ETP_I2C_XY_TRACENUM_CMD 0x0105
426696777cSDuson Lin #define ETP_I2C_MAX_X_AXIS_CMD 0x0106
436696777cSDuson Lin #define ETP_I2C_MAX_Y_AXIS_CMD 0x0107
446696777cSDuson Lin #define ETP_I2C_RESOLUTION_CMD 0x0108
45b9bced0eSduson #define ETP_I2C_PRESSURE_CMD 0x010A
466696777cSDuson Lin #define ETP_I2C_IAP_VERSION_CMD 0x0110
47fc7c882aSJingle Wu #define ETP_I2C_IC_TYPE_P0_CMD 0x0110
48df10cc8dSJingle Wu #define ETP_I2C_IAP_VERSION_P0_CMD 0x0111
496696777cSDuson Lin #define ETP_I2C_SET_CMD 0x0300
506696777cSDuson Lin #define ETP_I2C_POWER_CMD 0x0307
516696777cSDuson Lin #define ETP_I2C_FW_CHECKSUM_CMD 0x030F
526696777cSDuson Lin #define ETP_I2C_IAP_CTRL_CMD 0x0310
536696777cSDuson Lin #define ETP_I2C_IAP_CMD 0x0311
546696777cSDuson Lin #define ETP_I2C_IAP_RESET_CMD 0x0314
556696777cSDuson Lin #define ETP_I2C_IAP_CHECKSUM_CMD 0x0315
566696777cSDuson Lin #define ETP_I2C_CALIBRATE_CMD 0x0316
576696777cSDuson Lin #define ETP_I2C_MAX_BASELINE_CMD 0x0317
586696777cSDuson Lin #define ETP_I2C_MIN_BASELINE_CMD 0x0318
59bfd9b92bSJingle Wu #define ETP_I2C_IAP_TYPE_REG 0x0040
60bfd9b92bSJingle Wu #define ETP_I2C_IAP_TYPE_CMD 0x0304
616696777cSDuson Lin
626696777cSDuson Lin #define ETP_I2C_REPORT_LEN 34
6304d5ce62SJingle Wu #define ETP_I2C_REPORT_LEN_ID2 39
6404d5ce62SJingle Wu #define ETP_I2C_REPORT_MAX_LEN 39
656696777cSDuson Lin #define ETP_I2C_DESC_LENGTH 30
666696777cSDuson Lin #define ETP_I2C_REPORT_DESC_LENGTH 158
676696777cSDuson Lin #define ETP_I2C_INF_LENGTH 2
686696777cSDuson Lin #define ETP_I2C_IAP_PASSWORD 0x1EA5
696696777cSDuson Lin #define ETP_I2C_IAP_RESET 0xF0F0
706696777cSDuson Lin #define ETP_I2C_MAIN_MODE_ON (1 << 9)
716696777cSDuson Lin #define ETP_I2C_IAP_REG_L 0x01
726696777cSDuson Lin #define ETP_I2C_IAP_REG_H 0x06
736696777cSDuson Lin
elan_i2c_read_block(struct i2c_client * client,u16 reg,u8 * val,u16 len)746696777cSDuson Lin static int elan_i2c_read_block(struct i2c_client *client,
756696777cSDuson Lin u16 reg, u8 *val, u16 len)
766696777cSDuson Lin {
776696777cSDuson Lin __le16 buf[] = {
786696777cSDuson Lin cpu_to_le16(reg),
796696777cSDuson Lin };
806696777cSDuson Lin struct i2c_msg msgs[] = {
816696777cSDuson Lin {
826696777cSDuson Lin .addr = client->addr,
836696777cSDuson Lin .flags = client->flags & I2C_M_TEN,
846696777cSDuson Lin .len = sizeof(buf),
856696777cSDuson Lin .buf = (u8 *)buf,
866696777cSDuson Lin },
876696777cSDuson Lin {
886696777cSDuson Lin .addr = client->addr,
896696777cSDuson Lin .flags = (client->flags & I2C_M_TEN) | I2C_M_RD,
906696777cSDuson Lin .len = len,
916696777cSDuson Lin .buf = val,
926696777cSDuson Lin }
936696777cSDuson Lin };
946696777cSDuson Lin int ret;
956696777cSDuson Lin
966696777cSDuson Lin ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
976696777cSDuson Lin return ret == ARRAY_SIZE(msgs) ? 0 : (ret < 0 ? ret : -EIO);
986696777cSDuson Lin }
996696777cSDuson Lin
elan_i2c_read_cmd(struct i2c_client * client,u16 reg,u8 * val)1006696777cSDuson Lin static int elan_i2c_read_cmd(struct i2c_client *client, u16 reg, u8 *val)
1016696777cSDuson Lin {
1026696777cSDuson Lin int retval;
1036696777cSDuson Lin
1046696777cSDuson Lin retval = elan_i2c_read_block(client, reg, val, ETP_I2C_INF_LENGTH);
1056696777cSDuson Lin if (retval < 0) {
1066696777cSDuson Lin dev_err(&client->dev, "reading cmd (0x%04x) fail.\n", reg);
1076696777cSDuson Lin return retval;
1086696777cSDuson Lin }
1096696777cSDuson Lin
1106696777cSDuson Lin return 0;
1116696777cSDuson Lin }
1126696777cSDuson Lin
elan_i2c_write_cmd(struct i2c_client * client,u16 reg,u16 cmd)1136696777cSDuson Lin static int elan_i2c_write_cmd(struct i2c_client *client, u16 reg, u16 cmd)
1146696777cSDuson Lin {
1156696777cSDuson Lin __le16 buf[] = {
1166696777cSDuson Lin cpu_to_le16(reg),
1176696777cSDuson Lin cpu_to_le16(cmd),
1186696777cSDuson Lin };
1196696777cSDuson Lin struct i2c_msg msg = {
1206696777cSDuson Lin .addr = client->addr,
1216696777cSDuson Lin .flags = client->flags & I2C_M_TEN,
1226696777cSDuson Lin .len = sizeof(buf),
1236696777cSDuson Lin .buf = (u8 *)buf,
1246696777cSDuson Lin };
1256696777cSDuson Lin int ret;
1266696777cSDuson Lin
1276696777cSDuson Lin ret = i2c_transfer(client->adapter, &msg, 1);
128b3beed7fSDuson Lin if (ret != 1) {
129b3beed7fSDuson Lin if (ret >= 0)
130b3beed7fSDuson Lin ret = -EIO;
131b3beed7fSDuson Lin dev_err(&client->dev, "writing cmd (0x%04x) failed: %d\n",
132b3beed7fSDuson Lin reg, ret);
133b3beed7fSDuson Lin return ret;
134b3beed7fSDuson Lin }
135b3beed7fSDuson Lin
136b3beed7fSDuson Lin return 0;
1376696777cSDuson Lin }
1386696777cSDuson Lin
elan_i2c_initialize(struct i2c_client * client)1396696777cSDuson Lin static int elan_i2c_initialize(struct i2c_client *client)
1406696777cSDuson Lin {
1416696777cSDuson Lin struct device *dev = &client->dev;
1426696777cSDuson Lin int error;
1436696777cSDuson Lin u8 val[256];
1446696777cSDuson Lin
1456696777cSDuson Lin error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
1466696777cSDuson Lin if (error) {
1476696777cSDuson Lin dev_err(dev, "device reset failed: %d\n", error);
1486696777cSDuson Lin return error;
1496696777cSDuson Lin }
1506696777cSDuson Lin
1516696777cSDuson Lin /* Wait for the device to reset */
1526696777cSDuson Lin msleep(100);
1536696777cSDuson Lin
1546696777cSDuson Lin /* get reset acknowledgement 0000 */
1556696777cSDuson Lin error = i2c_master_recv(client, val, ETP_I2C_INF_LENGTH);
1566696777cSDuson Lin if (error < 0) {
1576696777cSDuson Lin dev_err(dev, "failed to read reset response: %d\n", error);
1586696777cSDuson Lin return error;
1596696777cSDuson Lin }
1606696777cSDuson Lin
1616696777cSDuson Lin error = elan_i2c_read_block(client, ETP_I2C_DESC_CMD,
1626696777cSDuson Lin val, ETP_I2C_DESC_LENGTH);
1636696777cSDuson Lin if (error) {
1646696777cSDuson Lin dev_err(dev, "cannot get device descriptor: %d\n", error);
1656696777cSDuson Lin return error;
1666696777cSDuson Lin }
1676696777cSDuson Lin
1686696777cSDuson Lin error = elan_i2c_read_block(client, ETP_I2C_REPORT_DESC_CMD,
1696696777cSDuson Lin val, ETP_I2C_REPORT_DESC_LENGTH);
1706696777cSDuson Lin if (error) {
1716696777cSDuson Lin dev_err(dev, "fetching report descriptor failed.: %d\n", error);
1726696777cSDuson Lin return error;
1736696777cSDuson Lin }
1746696777cSDuson Lin
1756696777cSDuson Lin return 0;
1766696777cSDuson Lin }
1776696777cSDuson Lin
elan_i2c_sleep_control(struct i2c_client * client,bool sleep)1786696777cSDuson Lin static int elan_i2c_sleep_control(struct i2c_client *client, bool sleep)
1796696777cSDuson Lin {
1806696777cSDuson Lin return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD,
1816696777cSDuson Lin sleep ? ETP_I2C_SLEEP : ETP_I2C_WAKE_UP);
1826696777cSDuson Lin }
1836696777cSDuson Lin
elan_i2c_power_control(struct i2c_client * client,bool enable)1846696777cSDuson Lin static int elan_i2c_power_control(struct i2c_client *client, bool enable)
1856696777cSDuson Lin {
1866696777cSDuson Lin u8 val[2];
1876696777cSDuson Lin u16 reg;
1886696777cSDuson Lin int error;
1896696777cSDuson Lin
1906696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_POWER_CMD, val);
1916696777cSDuson Lin if (error) {
1926696777cSDuson Lin dev_err(&client->dev,
1936696777cSDuson Lin "failed to read current power state: %d\n",
1946696777cSDuson Lin error);
1956696777cSDuson Lin return error;
1966696777cSDuson Lin }
1976696777cSDuson Lin
1986696777cSDuson Lin reg = le16_to_cpup((__le16 *)val);
1996696777cSDuson Lin if (enable)
2006696777cSDuson Lin reg &= ~ETP_DISABLE_POWER;
2016696777cSDuson Lin else
2026696777cSDuson Lin reg |= ETP_DISABLE_POWER;
2036696777cSDuson Lin
2046696777cSDuson Lin error = elan_i2c_write_cmd(client, ETP_I2C_POWER_CMD, reg);
2056696777cSDuson Lin if (error) {
2066696777cSDuson Lin dev_err(&client->dev,
2076696777cSDuson Lin "failed to write current power state: %d\n",
2086696777cSDuson Lin error);
2096696777cSDuson Lin return error;
2106696777cSDuson Lin }
2116696777cSDuson Lin
2126696777cSDuson Lin return 0;
2136696777cSDuson Lin }
2146696777cSDuson Lin
elan_i2c_set_mode(struct i2c_client * client,u8 mode)2156696777cSDuson Lin static int elan_i2c_set_mode(struct i2c_client *client, u8 mode)
2166696777cSDuson Lin {
2176696777cSDuson Lin return elan_i2c_write_cmd(client, ETP_I2C_SET_CMD, mode);
2186696777cSDuson Lin }
2196696777cSDuson Lin
2206696777cSDuson Lin
elan_i2c_calibrate(struct i2c_client * client)2216696777cSDuson Lin static int elan_i2c_calibrate(struct i2c_client *client)
2226696777cSDuson Lin {
2236696777cSDuson Lin return elan_i2c_write_cmd(client, ETP_I2C_CALIBRATE_CMD, 1);
2246696777cSDuson Lin }
2256696777cSDuson Lin
elan_i2c_calibrate_result(struct i2c_client * client,u8 * val)2266696777cSDuson Lin static int elan_i2c_calibrate_result(struct i2c_client *client, u8 *val)
2276696777cSDuson Lin {
2286696777cSDuson Lin return elan_i2c_read_block(client, ETP_I2C_CALIBRATE_CMD, val, 1);
2296696777cSDuson Lin }
2306696777cSDuson Lin
elan_i2c_get_baseline_data(struct i2c_client * client,bool max_baseline,u8 * value)2316696777cSDuson Lin static int elan_i2c_get_baseline_data(struct i2c_client *client,
2326696777cSDuson Lin bool max_baseline, u8 *value)
2336696777cSDuson Lin {
2346696777cSDuson Lin int error;
2356696777cSDuson Lin u8 val[3];
2366696777cSDuson Lin
2376696777cSDuson Lin error = elan_i2c_read_cmd(client,
2386696777cSDuson Lin max_baseline ? ETP_I2C_MAX_BASELINE_CMD :
2396696777cSDuson Lin ETP_I2C_MIN_BASELINE_CMD,
2406696777cSDuson Lin val);
2416696777cSDuson Lin if (error)
2426696777cSDuson Lin return error;
2436696777cSDuson Lin
2446696777cSDuson Lin *value = le16_to_cpup((__le16 *)val);
2456696777cSDuson Lin
2466696777cSDuson Lin return 0;
2476696777cSDuson Lin }
2486696777cSDuson Lin
elan_i2c_get_pattern(struct i2c_client * client,u8 * pattern)249a2eaf299SKT Liao static int elan_i2c_get_pattern(struct i2c_client *client, u8 *pattern)
250a2eaf299SKT Liao {
251a2eaf299SKT Liao int error;
252a2eaf299SKT Liao u8 val[3];
253a2eaf299SKT Liao
254a2eaf299SKT Liao error = elan_i2c_read_cmd(client, ETP_I2C_PATTERN_CMD, val);
255a2eaf299SKT Liao if (error) {
256a2eaf299SKT Liao dev_err(&client->dev, "failed to get pattern: %d\n", error);
257a2eaf299SKT Liao return error;
258a2eaf299SKT Liao }
25977da21c5SJingle Wu
26077da21c5SJingle Wu /*
26177da21c5SJingle Wu * Not all versions of firmware implement "get pattern" command.
26277da21c5SJingle Wu * When this command is not implemented the device will respond
26377da21c5SJingle Wu * with 0xFF 0xFF, which we will treat as "old" pattern 0.
26477da21c5SJingle Wu */
26577da21c5SJingle Wu *pattern = val[0] == 0xFF && val[1] == 0xFF ? 0 : val[1];
266a2eaf299SKT Liao
267a2eaf299SKT Liao return 0;
268a2eaf299SKT Liao }
269a2eaf299SKT Liao
elan_i2c_get_version(struct i2c_client * client,u8 pattern,bool iap,u8 * version)2706696777cSDuson Lin static int elan_i2c_get_version(struct i2c_client *client,
2713d712af6SDmitry Torokhov u8 pattern, bool iap, u8 *version)
2726696777cSDuson Lin {
2736696777cSDuson Lin int error;
274df10cc8dSJingle Wu u16 cmd;
2756696777cSDuson Lin u8 val[3];
2766696777cSDuson Lin
277df10cc8dSJingle Wu if (!iap)
278df10cc8dSJingle Wu cmd = ETP_I2C_FW_VERSION_CMD;
2793d712af6SDmitry Torokhov else if (pattern == 0)
280df10cc8dSJingle Wu cmd = ETP_I2C_IAP_VERSION_P0_CMD;
281df10cc8dSJingle Wu else
282df10cc8dSJingle Wu cmd = ETP_I2C_IAP_VERSION_CMD;
283df10cc8dSJingle Wu
284df10cc8dSJingle Wu error = elan_i2c_read_cmd(client, cmd, val);
2856696777cSDuson Lin if (error) {
2866696777cSDuson Lin dev_err(&client->dev, "failed to get %s version: %d\n",
2876696777cSDuson Lin iap ? "IAP" : "FW", error);
2886696777cSDuson Lin return error;
2896696777cSDuson Lin }
2906696777cSDuson Lin
2913d712af6SDmitry Torokhov if (pattern >= 0x01)
292a2eaf299SKT Liao *version = iap ? val[1] : val[0];
293a2eaf299SKT Liao else
2946696777cSDuson Lin *version = val[0];
2956696777cSDuson Lin return 0;
2966696777cSDuson Lin }
2976696777cSDuson Lin
elan_i2c_get_sm_version(struct i2c_client * client,u8 pattern,u16 * ic_type,u8 * version,u8 * clickpad)2983d712af6SDmitry Torokhov static int elan_i2c_get_sm_version(struct i2c_client *client, u8 pattern,
2993d712af6SDmitry Torokhov u16 *ic_type, u8 *version, u8 *clickpad)
3006696777cSDuson Lin {
3016696777cSDuson Lin int error;
3026696777cSDuson Lin u8 val[3];
3036696777cSDuson Lin
3043d712af6SDmitry Torokhov if (pattern >= 0x01) {
305a2eaf299SKT Liao error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_CMD, val);
306a2eaf299SKT Liao if (error) {
307a2eaf299SKT Liao dev_err(&client->dev, "failed to get ic type: %d\n",
308a2eaf299SKT Liao error);
309a2eaf299SKT Liao return error;
310a2eaf299SKT Liao }
311a2eaf299SKT Liao *ic_type = be16_to_cpup((__be16 *)val);
312a2eaf299SKT Liao
313a2eaf299SKT Liao error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
314a2eaf299SKT Liao val);
315a2eaf299SKT Liao if (error) {
316a2eaf299SKT Liao dev_err(&client->dev, "failed to get SM version: %d\n",
317a2eaf299SKT Liao error);
318a2eaf299SKT Liao return error;
319a2eaf299SKT Liao }
320a2eaf299SKT Liao *version = val[1];
32199136881SKT Liao *clickpad = val[0] & 0x10;
322a2eaf299SKT Liao } else {
323a2eaf299SKT Liao error = elan_i2c_read_cmd(client, ETP_I2C_OSM_VERSION_CMD, val);
324a2eaf299SKT Liao if (error) {
325a2eaf299SKT Liao dev_err(&client->dev, "failed to get SM version: %d\n",
326a2eaf299SKT Liao error);
327a2eaf299SKT Liao return error;
328a2eaf299SKT Liao }
3296696777cSDuson Lin *version = val[0];
330fc7c882aSJingle Wu
331fc7c882aSJingle Wu error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_P0_CMD, val);
332fc7c882aSJingle Wu if (error) {
333fc7c882aSJingle Wu dev_err(&client->dev, "failed to get ic type: %d\n",
334fc7c882aSJingle Wu error);
335fc7c882aSJingle Wu return error;
336fc7c882aSJingle Wu }
337fc7c882aSJingle Wu *ic_type = val[0];
33899136881SKT Liao
33999136881SKT Liao error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
34099136881SKT Liao val);
34199136881SKT Liao if (error) {
34299136881SKT Liao dev_err(&client->dev, "failed to get SM version: %d\n",
34399136881SKT Liao error);
34499136881SKT Liao return error;
34599136881SKT Liao }
34699136881SKT Liao *clickpad = val[0] & 0x10;
347a2eaf299SKT Liao }
348a2eaf299SKT Liao
3496696777cSDuson Lin return 0;
3506696777cSDuson Lin }
3516696777cSDuson Lin
elan_i2c_get_product_id(struct i2c_client * client,u16 * id)352ed75a14eSDuson Lin static int elan_i2c_get_product_id(struct i2c_client *client, u16 *id)
3536696777cSDuson Lin {
3546696777cSDuson Lin int error;
3556696777cSDuson Lin u8 val[3];
3566696777cSDuson Lin
3576696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_UNIQUEID_CMD, val);
3586696777cSDuson Lin if (error) {
3596696777cSDuson Lin dev_err(&client->dev, "failed to get product ID: %d\n", error);
3606696777cSDuson Lin return error;
3616696777cSDuson Lin }
3626696777cSDuson Lin
363ed75a14eSDuson Lin *id = le16_to_cpup((__le16 *)val);
3646696777cSDuson Lin return 0;
3656696777cSDuson Lin }
3666696777cSDuson Lin
elan_i2c_get_checksum(struct i2c_client * client,bool iap,u16 * csum)3676696777cSDuson Lin static int elan_i2c_get_checksum(struct i2c_client *client,
3686696777cSDuson Lin bool iap, u16 *csum)
3696696777cSDuson Lin {
3706696777cSDuson Lin int error;
3716696777cSDuson Lin u8 val[3];
3726696777cSDuson Lin
3736696777cSDuson Lin error = elan_i2c_read_cmd(client,
3746696777cSDuson Lin iap ? ETP_I2C_IAP_CHECKSUM_CMD :
3756696777cSDuson Lin ETP_I2C_FW_CHECKSUM_CMD,
3766696777cSDuson Lin val);
3776696777cSDuson Lin if (error) {
3786696777cSDuson Lin dev_err(&client->dev, "failed to get %s checksum: %d\n",
3796696777cSDuson Lin iap ? "IAP" : "FW", error);
3806696777cSDuson Lin return error;
3816696777cSDuson Lin }
3826696777cSDuson Lin
3836696777cSDuson Lin *csum = le16_to_cpup((__le16 *)val);
3846696777cSDuson Lin return 0;
3856696777cSDuson Lin }
3866696777cSDuson Lin
elan_i2c_get_max(struct i2c_client * client,unsigned int * max_x,unsigned int * max_y)3876696777cSDuson Lin static int elan_i2c_get_max(struct i2c_client *client,
3886696777cSDuson Lin unsigned int *max_x, unsigned int *max_y)
3896696777cSDuson Lin {
3906696777cSDuson Lin int error;
3916696777cSDuson Lin u8 val[3];
3926696777cSDuson Lin
3936696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_MAX_X_AXIS_CMD, val);
3946696777cSDuson Lin if (error) {
3956696777cSDuson Lin dev_err(&client->dev, "failed to get X dimension: %d\n", error);
3966696777cSDuson Lin return error;
3976696777cSDuson Lin }
3986696777cSDuson Lin
39904d5ce62SJingle Wu *max_x = le16_to_cpup((__le16 *)val);
4006696777cSDuson Lin
4016696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_MAX_Y_AXIS_CMD, val);
4026696777cSDuson Lin if (error) {
4036696777cSDuson Lin dev_err(&client->dev, "failed to get Y dimension: %d\n", error);
4046696777cSDuson Lin return error;
4056696777cSDuson Lin }
4066696777cSDuson Lin
40704d5ce62SJingle Wu *max_y = le16_to_cpup((__le16 *)val);
4086696777cSDuson Lin
4096696777cSDuson Lin return 0;
4106696777cSDuson Lin }
4116696777cSDuson Lin
elan_i2c_get_resolution(struct i2c_client * client,u8 * hw_res_x,u8 * hw_res_y)4126696777cSDuson Lin static int elan_i2c_get_resolution(struct i2c_client *client,
4136696777cSDuson Lin u8 *hw_res_x, u8 *hw_res_y)
4146696777cSDuson Lin {
4156696777cSDuson Lin int error;
4166696777cSDuson Lin u8 val[3];
4176696777cSDuson Lin
4186696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_RESOLUTION_CMD, val);
4196696777cSDuson Lin if (error) {
4206696777cSDuson Lin dev_err(&client->dev, "failed to get resolution: %d\n", error);
4216696777cSDuson Lin return error;
4226696777cSDuson Lin }
4236696777cSDuson Lin
4246696777cSDuson Lin *hw_res_x = val[0];
4256696777cSDuson Lin *hw_res_y = val[1];
4266696777cSDuson Lin
4276696777cSDuson Lin return 0;
4286696777cSDuson Lin }
4296696777cSDuson Lin
elan_i2c_get_num_traces(struct i2c_client * client,unsigned int * x_traces,unsigned int * y_traces)4306696777cSDuson Lin static int elan_i2c_get_num_traces(struct i2c_client *client,
4316696777cSDuson Lin unsigned int *x_traces,
4326696777cSDuson Lin unsigned int *y_traces)
4336696777cSDuson Lin {
4346696777cSDuson Lin int error;
4356696777cSDuson Lin u8 val[3];
4366696777cSDuson Lin
4376696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_XY_TRACENUM_CMD, val);
4386696777cSDuson Lin if (error) {
4396696777cSDuson Lin dev_err(&client->dev, "failed to get trace info: %d\n", error);
4406696777cSDuson Lin return error;
4416696777cSDuson Lin }
4426696777cSDuson Lin
4439f423801SDuson Lin *x_traces = val[0];
4449f423801SDuson Lin *y_traces = val[1];
4456696777cSDuson Lin
4466696777cSDuson Lin return 0;
4476696777cSDuson Lin }
4486696777cSDuson Lin
elan_i2c_get_pressure_adjustment(struct i2c_client * client,int * adjustment)449b9bced0eSduson static int elan_i2c_get_pressure_adjustment(struct i2c_client *client,
450b9bced0eSduson int *adjustment)
451b9bced0eSduson {
452b9bced0eSduson int error;
453b9bced0eSduson u8 val[3];
454b9bced0eSduson
455b9bced0eSduson error = elan_i2c_read_cmd(client, ETP_I2C_PRESSURE_CMD, val);
456b9bced0eSduson if (error) {
457b9bced0eSduson dev_err(&client->dev, "failed to get pressure format: %d\n",
458b9bced0eSduson error);
459b9bced0eSduson return error;
460b9bced0eSduson }
461b9bced0eSduson
462b9bced0eSduson if ((val[0] >> 4) & 0x1)
463b9bced0eSduson *adjustment = 0;
464b9bced0eSduson else
465b9bced0eSduson *adjustment = ETP_PRESSURE_OFFSET;
466b9bced0eSduson
467b9bced0eSduson return 0;
468b9bced0eSduson }
469b9bced0eSduson
elan_i2c_iap_get_mode(struct i2c_client * client,enum tp_mode * mode)4706696777cSDuson Lin static int elan_i2c_iap_get_mode(struct i2c_client *client, enum tp_mode *mode)
4716696777cSDuson Lin {
4726696777cSDuson Lin int error;
4736696777cSDuson Lin u16 constant;
4746696777cSDuson Lin u8 val[3];
4756696777cSDuson Lin
4766696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
4776696777cSDuson Lin if (error) {
4786696777cSDuson Lin dev_err(&client->dev,
4796696777cSDuson Lin "failed to read iap control register: %d\n",
4806696777cSDuson Lin error);
4816696777cSDuson Lin return error;
4826696777cSDuson Lin }
4836696777cSDuson Lin
4846696777cSDuson Lin constant = le16_to_cpup((__le16 *)val);
4856696777cSDuson Lin dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant);
4866696777cSDuson Lin
4876696777cSDuson Lin *mode = (constant & ETP_I2C_MAIN_MODE_ON) ? MAIN_MODE : IAP_MODE;
4886696777cSDuson Lin
4896696777cSDuson Lin return 0;
4906696777cSDuson Lin }
4916696777cSDuson Lin
elan_i2c_iap_reset(struct i2c_client * client)4926696777cSDuson Lin static int elan_i2c_iap_reset(struct i2c_client *client)
4936696777cSDuson Lin {
4946696777cSDuson Lin int error;
4956696777cSDuson Lin
4966696777cSDuson Lin error = elan_i2c_write_cmd(client, ETP_I2C_IAP_RESET_CMD,
4976696777cSDuson Lin ETP_I2C_IAP_RESET);
4986696777cSDuson Lin if (error) {
4996696777cSDuson Lin dev_err(&client->dev, "cannot reset IC: %d\n", error);
5006696777cSDuson Lin return error;
5016696777cSDuson Lin }
5026696777cSDuson Lin
5036696777cSDuson Lin return 0;
5046696777cSDuson Lin }
5056696777cSDuson Lin
elan_i2c_set_flash_key(struct i2c_client * client)5066696777cSDuson Lin static int elan_i2c_set_flash_key(struct i2c_client *client)
5076696777cSDuson Lin {
5086696777cSDuson Lin int error;
5096696777cSDuson Lin
5106696777cSDuson Lin error = elan_i2c_write_cmd(client, ETP_I2C_IAP_CMD,
5116696777cSDuson Lin ETP_I2C_IAP_PASSWORD);
5126696777cSDuson Lin if (error) {
5136696777cSDuson Lin dev_err(&client->dev, "cannot set flash key: %d\n", error);
5146696777cSDuson Lin return error;
5156696777cSDuson Lin }
5166696777cSDuson Lin
5176696777cSDuson Lin return 0;
5186696777cSDuson Lin }
5196696777cSDuson Lin
elan_read_write_iap_type(struct i2c_client * client,u16 fw_page_size)520*ae3d6083Sjingle.wu static int elan_read_write_iap_type(struct i2c_client *client, u16 fw_page_size)
521bfd9b92bSJingle Wu {
522bfd9b92bSJingle Wu int error;
523bfd9b92bSJingle Wu u16 constant;
524bfd9b92bSJingle Wu u8 val[3];
525bfd9b92bSJingle Wu int retry = 3;
526bfd9b92bSJingle Wu
527bfd9b92bSJingle Wu do {
528bfd9b92bSJingle Wu error = elan_i2c_write_cmd(client, ETP_I2C_IAP_TYPE_CMD,
529*ae3d6083Sjingle.wu fw_page_size / 2);
530bfd9b92bSJingle Wu if (error) {
531bfd9b92bSJingle Wu dev_err(&client->dev,
532bfd9b92bSJingle Wu "cannot write iap type: %d\n", error);
533bfd9b92bSJingle Wu return error;
534bfd9b92bSJingle Wu }
535bfd9b92bSJingle Wu
536bfd9b92bSJingle Wu error = elan_i2c_read_cmd(client, ETP_I2C_IAP_TYPE_CMD, val);
537bfd9b92bSJingle Wu if (error) {
538bfd9b92bSJingle Wu dev_err(&client->dev,
539bfd9b92bSJingle Wu "failed to read iap type register: %d\n",
540bfd9b92bSJingle Wu error);
541bfd9b92bSJingle Wu return error;
542bfd9b92bSJingle Wu }
543bfd9b92bSJingle Wu constant = le16_to_cpup((__le16 *)val);
544bfd9b92bSJingle Wu dev_dbg(&client->dev, "iap type reg: 0x%04x\n", constant);
545bfd9b92bSJingle Wu
546*ae3d6083Sjingle.wu if (constant == fw_page_size / 2)
547bfd9b92bSJingle Wu return 0;
548bfd9b92bSJingle Wu
549bfd9b92bSJingle Wu } while (--retry > 0);
550bfd9b92bSJingle Wu
551bfd9b92bSJingle Wu dev_err(&client->dev, "cannot set iap type\n");
552bfd9b92bSJingle Wu return -EIO;
553bfd9b92bSJingle Wu }
554bfd9b92bSJingle Wu
elan_i2c_prepare_fw_update(struct i2c_client * client,u16 ic_type,u8 iap_version,u16 fw_page_size)555bfd9b92bSJingle Wu static int elan_i2c_prepare_fw_update(struct i2c_client *client, u16 ic_type,
556*ae3d6083Sjingle.wu u8 iap_version, u16 fw_page_size)
5576696777cSDuson Lin {
5586696777cSDuson Lin struct device *dev = &client->dev;
5596696777cSDuson Lin int error;
5606696777cSDuson Lin enum tp_mode mode;
5616696777cSDuson Lin u8 val[3];
5626696777cSDuson Lin u16 password;
5636696777cSDuson Lin
5646696777cSDuson Lin /* Get FW in which mode (IAP_MODE/MAIN_MODE) */
5656696777cSDuson Lin error = elan_i2c_iap_get_mode(client, &mode);
5666696777cSDuson Lin if (error)
5676696777cSDuson Lin return error;
5686696777cSDuson Lin
5696696777cSDuson Lin if (mode == IAP_MODE) {
5706696777cSDuson Lin /* Reset IC */
5716696777cSDuson Lin error = elan_i2c_iap_reset(client);
5726696777cSDuson Lin if (error)
5736696777cSDuson Lin return error;
5746696777cSDuson Lin
5756696777cSDuson Lin msleep(30);
5766696777cSDuson Lin }
5776696777cSDuson Lin
5786696777cSDuson Lin /* Set flash key*/
5796696777cSDuson Lin error = elan_i2c_set_flash_key(client);
5806696777cSDuson Lin if (error)
5816696777cSDuson Lin return error;
5826696777cSDuson Lin
5836696777cSDuson Lin /* Wait for F/W IAP initialization */
5846696777cSDuson Lin msleep(mode == MAIN_MODE ? 100 : 30);
5856696777cSDuson Lin
5866696777cSDuson Lin /* Check if we are in IAP mode or not */
5876696777cSDuson Lin error = elan_i2c_iap_get_mode(client, &mode);
5886696777cSDuson Lin if (error)
5896696777cSDuson Lin return error;
5906696777cSDuson Lin
5916696777cSDuson Lin if (mode == MAIN_MODE) {
5926696777cSDuson Lin dev_err(dev, "wrong mode: %d\n", mode);
5936696777cSDuson Lin return -EIO;
5946696777cSDuson Lin }
5956696777cSDuson Lin
596bfd9b92bSJingle Wu if (ic_type >= 0x0D && iap_version >= 1) {
597*ae3d6083Sjingle.wu error = elan_read_write_iap_type(client, fw_page_size);
598bfd9b92bSJingle Wu if (error)
599bfd9b92bSJingle Wu return error;
600bfd9b92bSJingle Wu }
601bfd9b92bSJingle Wu
6026696777cSDuson Lin /* Set flash key again */
6036696777cSDuson Lin error = elan_i2c_set_flash_key(client);
6046696777cSDuson Lin if (error)
6056696777cSDuson Lin return error;
6066696777cSDuson Lin
6076696777cSDuson Lin /* Wait for F/W IAP initialization */
6086696777cSDuson Lin msleep(30);
6096696777cSDuson Lin
6106696777cSDuson Lin /* read back to check we actually enabled successfully. */
6116696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CMD, val);
6126696777cSDuson Lin if (error) {
6136696777cSDuson Lin dev_err(dev, "cannot read iap password: %d\n",
6146696777cSDuson Lin error);
6156696777cSDuson Lin return error;
6166696777cSDuson Lin }
6176696777cSDuson Lin
6186696777cSDuson Lin password = le16_to_cpup((__le16 *)val);
6196696777cSDuson Lin if (password != ETP_I2C_IAP_PASSWORD) {
6206696777cSDuson Lin dev_err(dev, "wrong iap password: 0x%X\n", password);
6216696777cSDuson Lin return -EIO;
6226696777cSDuson Lin }
6236696777cSDuson Lin
6246696777cSDuson Lin return 0;
6256696777cSDuson Lin }
6266696777cSDuson Lin
elan_i2c_write_fw_block(struct i2c_client * client,u16 fw_page_size,const u8 * page,u16 checksum,int idx)627059d6c2dSJingle Wu static int elan_i2c_write_fw_block(struct i2c_client *client, u16 fw_page_size,
6286696777cSDuson Lin const u8 *page, u16 checksum, int idx)
6296696777cSDuson Lin {
6306696777cSDuson Lin struct device *dev = &client->dev;
631059d6c2dSJingle Wu u8 *page_store;
6326696777cSDuson Lin u8 val[3];
6336696777cSDuson Lin u16 result;
6346696777cSDuson Lin int ret, error;
6356696777cSDuson Lin
636059d6c2dSJingle Wu page_store = kmalloc(fw_page_size + 4, GFP_KERNEL);
637059d6c2dSJingle Wu if (!page_store)
638059d6c2dSJingle Wu return -ENOMEM;
639059d6c2dSJingle Wu
6406696777cSDuson Lin page_store[0] = ETP_I2C_IAP_REG_L;
6416696777cSDuson Lin page_store[1] = ETP_I2C_IAP_REG_H;
642059d6c2dSJingle Wu memcpy(&page_store[2], page, fw_page_size);
6436696777cSDuson Lin /* recode checksum at last two bytes */
644059d6c2dSJingle Wu put_unaligned_le16(checksum, &page_store[fw_page_size + 2]);
6456696777cSDuson Lin
646059d6c2dSJingle Wu ret = i2c_master_send(client, page_store, fw_page_size + 4);
647059d6c2dSJingle Wu if (ret != fw_page_size + 4) {
6486696777cSDuson Lin error = ret < 0 ? ret : -EIO;
6496696777cSDuson Lin dev_err(dev, "Failed to write page %d: %d\n", idx, error);
650059d6c2dSJingle Wu goto exit;
6516696777cSDuson Lin }
6526696777cSDuson Lin
6536696777cSDuson Lin /* Wait for F/W to update one page ROM data. */
654059d6c2dSJingle Wu msleep(fw_page_size == ETP_FW_PAGE_SIZE_512 ? 50 : 35);
6556696777cSDuson Lin
6566696777cSDuson Lin error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
6576696777cSDuson Lin if (error) {
6586696777cSDuson Lin dev_err(dev, "Failed to read IAP write result: %d\n", error);
659059d6c2dSJingle Wu goto exit;
6606696777cSDuson Lin }
6616696777cSDuson Lin
6626696777cSDuson Lin result = le16_to_cpup((__le16 *)val);
6636696777cSDuson Lin if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
6646696777cSDuson Lin dev_err(dev, "IAP reports failed write: %04hx\n",
6656696777cSDuson Lin result);
666059d6c2dSJingle Wu error = -EIO;
667059d6c2dSJingle Wu goto exit;
6686696777cSDuson Lin }
6696696777cSDuson Lin
670059d6c2dSJingle Wu exit:
671059d6c2dSJingle Wu kfree(page_store);
672059d6c2dSJingle Wu return error;
6736696777cSDuson Lin }
6746696777cSDuson Lin
elan_i2c_finish_fw_update(struct i2c_client * client,struct completion * completion)6756696777cSDuson Lin static int elan_i2c_finish_fw_update(struct i2c_client *client,
6766696777cSDuson Lin struct completion *completion)
6776696777cSDuson Lin {
6786696777cSDuson Lin struct device *dev = &client->dev;
67904d5ce62SJingle Wu int error = 0;
6806696777cSDuson Lin int len;
68104d5ce62SJingle Wu u8 buffer[ETP_I2C_REPORT_MAX_LEN];
6824b3c7dbbSKT Liao
68304d5ce62SJingle Wu len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_MAX_LEN);
68404d5ce62SJingle Wu if (len <= 0) {
6854b3c7dbbSKT Liao error = len < 0 ? len : -EIO;
6864b3c7dbbSKT Liao dev_warn(dev, "failed to read I2C data after FW WDT reset: %d (%d)\n",
6874b3c7dbbSKT Liao error, len);
6884b3c7dbbSKT Liao }
6896696777cSDuson Lin
6906696777cSDuson Lin reinit_completion(completion);
6916696777cSDuson Lin enable_irq(client->irq);
6926696777cSDuson Lin
6936696777cSDuson Lin error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
6946696777cSDuson Lin if (error) {
6956696777cSDuson Lin dev_err(dev, "device reset failed: %d\n", error);
696a04f1440SKT Liao } else if (!wait_for_completion_timeout(completion,
697a04f1440SKT Liao msecs_to_jiffies(300))) {
6986696777cSDuson Lin dev_err(dev, "timeout waiting for device reset\n");
699a04f1440SKT Liao error = -ETIMEDOUT;
7006696777cSDuson Lin }
7016696777cSDuson Lin
702a04f1440SKT Liao disable_irq(client->irq);
703a04f1440SKT Liao
704a04f1440SKT Liao if (error)
705a04f1440SKT Liao return error;
706a04f1440SKT Liao
7076696777cSDuson Lin len = i2c_master_recv(client, buffer, ETP_I2C_INF_LENGTH);
7086696777cSDuson Lin if (len != ETP_I2C_INF_LENGTH) {
7096696777cSDuson Lin error = len < 0 ? len : -EIO;
7106696777cSDuson Lin dev_err(dev, "failed to read INT signal: %d (%d)\n",
7116696777cSDuson Lin error, len);
7126696777cSDuson Lin return error;
7136696777cSDuson Lin }
7146696777cSDuson Lin
7156696777cSDuson Lin return 0;
7166696777cSDuson Lin }
7176696777cSDuson Lin
elan_i2c_get_report_features(struct i2c_client * client,u8 pattern,unsigned int * features,unsigned int * report_len)71804d5ce62SJingle Wu static int elan_i2c_get_report_features(struct i2c_client *client, u8 pattern,
71904d5ce62SJingle Wu unsigned int *features,
72004d5ce62SJingle Wu unsigned int *report_len)
72104d5ce62SJingle Wu {
72204d5ce62SJingle Wu *features = ETP_FEATURE_REPORT_MK;
72304d5ce62SJingle Wu *report_len = pattern <= 0x01 ?
72404d5ce62SJingle Wu ETP_I2C_REPORT_LEN : ETP_I2C_REPORT_LEN_ID2;
72504d5ce62SJingle Wu return 0;
72604d5ce62SJingle Wu }
72704d5ce62SJingle Wu
elan_i2c_get_report(struct i2c_client * client,u8 * report,unsigned int report_len)72804d5ce62SJingle Wu static int elan_i2c_get_report(struct i2c_client *client,
72904d5ce62SJingle Wu u8 *report, unsigned int report_len)
7306696777cSDuson Lin {
7316696777cSDuson Lin int len;
7326696777cSDuson Lin
73304d5ce62SJingle Wu len = i2c_master_recv(client, report, report_len);
7346696777cSDuson Lin if (len < 0) {
7356696777cSDuson Lin dev_err(&client->dev, "failed to read report data: %d\n", len);
7366696777cSDuson Lin return len;
7376696777cSDuson Lin }
7386696777cSDuson Lin
73904d5ce62SJingle Wu if (len != report_len) {
7406696777cSDuson Lin dev_err(&client->dev,
7416696777cSDuson Lin "wrong report length (%d vs %d expected)\n",
74204d5ce62SJingle Wu len, report_len);
7436696777cSDuson Lin return -EIO;
7446696777cSDuson Lin }
7456696777cSDuson Lin
7466696777cSDuson Lin return 0;
7476696777cSDuson Lin }
7486696777cSDuson Lin
7496696777cSDuson Lin const struct elan_transport_ops elan_i2c_ops = {
7506696777cSDuson Lin .initialize = elan_i2c_initialize,
7516696777cSDuson Lin .sleep_control = elan_i2c_sleep_control,
7526696777cSDuson Lin .power_control = elan_i2c_power_control,
7536696777cSDuson Lin .set_mode = elan_i2c_set_mode,
7546696777cSDuson Lin
7556696777cSDuson Lin .calibrate = elan_i2c_calibrate,
7566696777cSDuson Lin .calibrate_result = elan_i2c_calibrate_result,
7576696777cSDuson Lin
7586696777cSDuson Lin .get_baseline_data = elan_i2c_get_baseline_data,
7596696777cSDuson Lin
7606696777cSDuson Lin .get_version = elan_i2c_get_version,
7616696777cSDuson Lin .get_sm_version = elan_i2c_get_sm_version,
7626696777cSDuson Lin .get_product_id = elan_i2c_get_product_id,
7636696777cSDuson Lin .get_checksum = elan_i2c_get_checksum,
764b9bced0eSduson .get_pressure_adjustment = elan_i2c_get_pressure_adjustment,
7656696777cSDuson Lin
7666696777cSDuson Lin .get_max = elan_i2c_get_max,
7676696777cSDuson Lin .get_resolution = elan_i2c_get_resolution,
7686696777cSDuson Lin .get_num_traces = elan_i2c_get_num_traces,
7696696777cSDuson Lin
7706696777cSDuson Lin .iap_get_mode = elan_i2c_iap_get_mode,
7716696777cSDuson Lin .iap_reset = elan_i2c_iap_reset,
7726696777cSDuson Lin
7736696777cSDuson Lin .prepare_fw_update = elan_i2c_prepare_fw_update,
7746696777cSDuson Lin .write_fw_block = elan_i2c_write_fw_block,
7756696777cSDuson Lin .finish_fw_update = elan_i2c_finish_fw_update,
7766696777cSDuson Lin
777a2eaf299SKT Liao .get_pattern = elan_i2c_get_pattern,
778a2eaf299SKT Liao
77904d5ce62SJingle Wu .get_report_features = elan_i2c_get_report_features,
7806696777cSDuson Lin .get_report = elan_i2c_get_report,
7816696777cSDuson Lin };
782