-/* drivers/input/keyboard/max1871.c
- *
+/*
* Copyright (C) 2011 Maxim Integrated Products, Inc.
*
* Driver Version: 1.01
*
*/
-
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/max11871.h>
#include <linux/gpio.h>
-#define MAXIM_I2C_RETRY_TIMES 10
-#define MAXIM_NULL '\0'
+#define MAX11871_CMD_ADDR 0x0000
+#define MAX11871_CMD_LEN 10
-#define MAXIM_DEBUG_VERBOSE 0
-#define MAXIM_TOUCH_REPORT_MODE 0x01 /* 1=basic, 2=extended */
+/* commands */
+#define MAX11871_CMD_SET_TOUCH_RPT_MODE 0x0018
+#define MAX11871_TOUCH_RPT_RAW 0x00
+#define MAX11871_TOUCH_RPT_BASIC 0x01
+#define MAX11871_TOUCH_RPT_EXTEND 0x02
+#define MAX11871_CMD_SET_POWER_MODE 0x0020
+#define MAX11871_POWER_SLEEP 0x0
+#define MAX11871_POWER_ACTIVE 0x2
+#define MAX11871_CMD_GET_FW_VERSION 0x0040
+
+/*
+ * command packet format
+ * header: 15 - 12 11 - 8 7 - 0
+ * total number of packets current packet number current packet size
+ * id: command id
+ * size: command data size in word (16-bit)
+ */
+
+struct max11871_packet {
+#define PACKET_NUM_SHIFT 12
+#define PACKET_CUR_SHIFT 8
+ __le16 header;
+ __le16 id;
+ __le16 size;
+ __le16 data[0];
+} __packed;
#define MAXIM_BUTTONS_HANDLED_IN_CHIP 0 /* Set to 1 if the chip is configured
* to report button touches in the
#define MAXIM_TOUCH_BACK KEY_BACK
#define MAXIM_TOUCH_SEARCH KEY_SEARCH
+#define MAXIM_DEBUG_VERBOSE 0
+
#if MAXIM_DEBUG_VERBOSE
#define maxinfo(format, args...)\
do { \
static void max11871_late_resume(struct early_suspend *h);
#endif
-static int max11871_change_touch_rpt(struct i2c_client *client, int to);
-static int max11871_get_fw_version(struct i2c_client *client);
+static int max11871_change_touch_rpt(struct max11871_data *ts, int mode);
+static int max11871_get_fw_version(struct max11871_data *ts);
u8 *ReportBuffer;
#define SIZE_OF_RPT_BUFFER 1024
}
}
- /* Configure for Extended Touch reports */
- i = max11871_change_touch_rpt(ts->client, (int)MAXIM_TOUCH_REPORT_MODE);
-
- if (i < 0) {
+ /* Configure for basic Touch reports */
+ ret = max11871_change_touch_rpt(ts, MAX11871_TOUCH_RPT_BASIC);
+ if (ret < 0) {
maxerr("Failed to configure touch mode!!!\n");
- ret = -ENODEV;
goto err_detect_failed;
}
}
/* Get the firmware version */
- if (max11871_get_fw_version(ts->client) < 0) {
+ if (max11871_get_fw_version(ts) < 0) {
maxerr("Couldn't send firmware version command!");
ret = -ENODEV;
goto err_detect_failed;
return 0;
}
-/*
- COMMANDS
-*/
-static int max11871_get_fw_version(struct i2c_client *client)
+/* packet size in bytes including the header */
+static int max11871_packet_size(struct max11871_packet *p)
{
- uint8_t data[16];
- int ret = 0;
-
- memset(data, 0x00, sizeof(data));
- /*
- * Retrieve the Firmware Version
- */
+ return ((le16_to_cpu(p->header) & 0xff) + 1) * 2;
+}
- data[0] = 0x00; /*for cmd addr pointer*/
- data[1] = 0x00;
+/* TODO: support cmd with data > 7 words */
+static int max11871_write_cmd(struct max11871_data *ts,
+ struct max11871_packet *p)
+{
+ int size = max11871_packet_size(p);
+ __le16 buf[MAX11871_CMD_LEN + 1];
- data[2] = 0x02;
- data[3] = 0x11;
+ buf[0] = cpu_to_le16(MAX11871_CMD_ADDR);
+ memcpy(&buf[1], p, size);
- data[4] = MAX11871_CMD_GET_FW_VERSION; /*0x40*/
- data[5] = 0x00;
+ return i2c_master_send(ts->client, (const char *)buf, size + 2);
+}
- data[6] = 0x00;
- data[7] = 0x00;
+/*
+ * COMMANDS
+ */
+static int max11871_get_fw_version(struct max11871_data *ts)
+{
+ u16 buf[MAX11871_CMD_LEN];
+ struct max11871_packet *p = (struct max11871_packet *)buf;
- /*
- maxinfo("FWVW: Data[0:3]: 0x%02X 0x%02X 0x%02X 0x%02X\n",
- data[0], data[1], data[2], data[3]);
+ p->header = cpu_to_le16(1 << PACKET_NUM_SHIFT |
+ 1 << PACKET_CUR_SHIFT | 2);
+ p->id = cpu_to_le16(MAX11871_CMD_GET_FW_VERSION);
+ p->size = cpu_to_le16(0);
- maxinfo("FWVW: Data[4:7]: 0x%02X 0x%02X 0x%02X 0x%02X\n",
- data[4], data[5], data[6], data[7]);
- */
+ return max11871_write_cmd(ts, p);
+}
- /*maxinfo("-> I2C master send...\n");*/
- ret = i2c_master_send(client, data, 8);
- /*maxinfo("<- I2C master send: ret: %d\n", ret);*/
+static int max11871_set_power_mode(struct max11871_data *ts, int mode)
+{
+ u16 buf[MAX11871_CMD_LEN];
+ struct max11871_packet *p = (struct max11871_packet *)buf;
- if (ret < 0)
- maxerr("Maxim 11871 I2C failure: %d. Exiting\n", ret);
+ p->header = cpu_to_le16(1 << PACKET_NUM_SHIFT |
+ 1 << PACKET_CUR_SHIFT | 3);
+ p->id = cpu_to_le16(MAX11871_CMD_SET_POWER_MODE);
+ p->size = cpu_to_le16(1);
+ p->data[0] = cpu_to_le16(mode);
- return ret;
+ return max11871_write_cmd(ts, p);
}
static int max11871_suspend(struct i2c_client *client, pm_message_t mesg)
{
- uint8_t data[16];
- int ret = 0;
+ struct max11871_data *ts = i2c_get_clientdata(client);
+ int ret;
maxinfo("Enter max11871_suspend\n");
- disable_irq_nosync(client->irq);
-
- memset(data , 0x00 , sizeof(data));
-
- /* Set Power level to Sleep mode... */
-
- data[0] = 0x00;
- data[1] = 0x00;
-
- data[2] = 0x03;
- data[3] = 0x11;
-
- data[4] = MAX11871_CMD_SET_POWER_MODE;
- data[5] = 0x00;
-
- data[6] = 0x01;
- data[7] = 0x00;
-
- data[8] = 0x00; /* Sleep mode */
- data[9] = 0x00;
-
- ret = i2c_master_send(client, data, 10);
+ disable_irq(client->irq);
+ ret = max11871_set_power_mode(ts, MAX11871_POWER_SLEEP);
if (ret < 0)
- maxerr("max11871 I2C failure on Suspend: %d. Exiting\n", ret);
+ dev_err(&client->dev, "failed to put device to sleep\n");
return ret;
}
static int max11871_resume(struct i2c_client *client)
{
struct max11871_data *ts = i2c_get_clientdata(client);
- uint8_t data[16];
int ret = 0;
int i;
ts->finger[i].status = MAX11871_FINGER_RELEASE;
}
- memset(data , 0x00 , sizeof(data));
- /* Set Power level to Active Scan mode... */
- data[0] = 0x00; /* Sets addr ptr to command area */
- data[1] = 0x00;
-
- data[2] = 0x03;
- data[3] = 0x11;
-
- data[4] = MAX11871_CMD_SET_POWER_MODE;
- data[5] = 0x00;
-
- data[6] = 0x01;
- data[7] = 0x00;
-
- data[8] = 0x02; /* Active Scan mode */
- data[9] = 0x00;
-
- ret = i2c_master_send(client, data, 10);
+ ret = max11871_set_power_mode(ts, MAX11871_POWER_ACTIVE);
if (ret < 0)
- maxerr("Maxim11871 I2C failure on Resume: %d. Exiting\n", ret);
-
+ dev_err(&client->dev, "failed to resume device\n");
enable_irq(client->irq);
+
return ret;
}
-static int max11871_change_touch_rpt(struct i2c_client *client, int to)
+static int max11871_change_touch_rpt(struct max11871_data *ts, int mode)
{
- int ret = 0;
- uint8_t data[16];
-
- memset(data, 0x00, sizeof(data));
+ u16 buf[MAX11871_CMD_LEN];
+ struct max11871_packet *p = (struct max11871_packet *)buf;
- to &= 0x00000003; /* 0: 800, 1: 801, 2: 802 */
+ p->header = cpu_to_le16(1 << PACKET_NUM_SHIFT |
+ 1 << PACKET_CUR_SHIFT | 3);
+ p->id = cpu_to_le16(MAX11871_CMD_SET_TOUCH_RPT_MODE);
+ p->size = cpu_to_le16(1);
+ p->data[0] = cpu_to_le16(mode);
- /*maxinfo("Entry: new rpt code: %d\n", to);*/
-
- data[0] = 0x00;
- data[1] = 0x00;
-
- data[2] = 0x03;
- data[3] = 0x11;
-
- data[4] = MAX11871_CMD_SET_TOUCH_RPT_MODE; /*0x18*/
- data[5] = 0x00;
-
- data[6] = 0x01;
- data[7] = 0x00;
-
- data[8] = (unsigned char) to;
- data[9] = 0x00;
-
-
- /*
- maxinfo("B18W: Data[0:3]: 0x%02X 0x%02X 0x%02X 0x%02X\n",
- data[0], data[1], data[2], data[3]);
- maxinfo("B18W: Data[4:7]: 0x%02X 0x%02X 0x%02X 0x%02X\n",
- data[4], data[5], data[6], data[7]);
- maxinfo("B18W: Data[8:11]: 0x%02X 0x%02X 0x%02X 0x%02X\n",
- data[8], data[9], data[10], data[11]);
- */
-
-
- ret = i2c_master_send(client, data, 10);
- if (ret < 0) {
- maxerr("Maxim 11871 I2C failure: %d. Exiting\n", ret);
- ;
- }
-
- return ret;
+ return max11871_write_cmd(ts, p);
}
-
#ifdef CONFIG_HAS_EARLYSUSPEND
static void max11871_early_suspend(struct early_suspend *h)
{
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