diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 138 |
1 files changed, 93 insertions, 45 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 61f9ef221d12..44c1be65dbb4 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -29,12 +29,6 @@ #define MXT_VER_21 21 #define MXT_VER_22 22 -/* Slave addresses */ -#define MXT_APP_LOW 0x4a -#define MXT_APP_HIGH 0x4b -#define MXT_BOOT_LOW 0x24 -#define MXT_BOOT_HIGH 0x25 - /* Firmware */ #define MXT_FW_NAME "maxtouch.fw" @@ -261,6 +255,7 @@ struct mxt_data { unsigned int max_y; bool in_bootloader; u32 config_crc; + u8 bootloader_addr; /* Cached parameters from object table */ u8 T6_reportid; @@ -378,9 +373,82 @@ static int mxt_wait_for_completion(struct mxt_data *data, return 0; } +static int mxt_bootloader_read(struct mxt_data *data, + u8 *val, unsigned int count) +{ + int ret; + struct i2c_msg msg; + + msg.addr = data->bootloader_addr; + msg.flags = data->client->flags & I2C_M_TEN; + msg.flags |= I2C_M_RD; + msg.len = count; + msg.buf = val; + + ret = i2c_transfer(data->client->adapter, &msg, 1); + + if (ret == 1) { + ret = 0; + } else { + ret = ret < 0 ? ret : -EIO; + dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n", + __func__, ret); + } + + return ret; +} + +static int mxt_bootloader_write(struct mxt_data *data, + const u8 * const val, unsigned int count) +{ + int ret; + struct i2c_msg msg; + + msg.addr = data->bootloader_addr; + msg.flags = data->client->flags & I2C_M_TEN; + msg.len = count; + msg.buf = (u8 *)val; + + ret = i2c_transfer(data->client->adapter, &msg, 1); + if (ret == 1) { + ret = 0; + } else { + ret = ret < 0 ? ret : -EIO; + dev_err(&data->client->dev, "%s: i2c send failed (%d)\n", + __func__, ret); + } + + return ret; +} + +static int mxt_lookup_bootloader_address(struct mxt_data *data) +{ + u8 appmode = data->client->addr; + u8 bootloader; + + switch (appmode) { + case 0x4a: + case 0x4b: + case 0x4c: + case 0x4d: + case 0x5a: + case 0x5b: + bootloader = appmode - 0x26; + break; + default: + dev_err(&data->client->dev, + "Appmode i2c address 0x%02x not found\n", + appmode); + return -EINVAL; + } + + data->bootloader_addr = bootloader; + return 0; +} + static int mxt_check_bootloader(struct mxt_data *data, unsigned int state) { - struct i2c_client *client = data->client; + struct device *dev = &data->client->dev; u8 val; int ret; @@ -401,15 +469,14 @@ recheck: * by writing length 0x000 to device (iff we are in * WAITING_FRAME_DATA state). */ - dev_err(&client->dev, "Update wait error %d\n", ret); + dev_err(dev, "Update wait error %d\n", ret); return ret; } } - if (i2c_master_recv(client, &val, 1) != 1) { - dev_err(&client->dev, "%s: i2c recv failed\n", __func__); - return -EIO; - } + ret = mxt_bootloader_read(data, &val, 1); + if (ret) + return ret; switch (state) { case MXT_WAITING_BOOTLOAD_CMD: @@ -425,7 +492,7 @@ recheck: } if (val != state) { - dev_err(&client->dev, "Invalid bootloader state %02X != %02X\n", + dev_err(dev, "Invalid bootloader state %02X != %02X\n", val, state); return -EINVAL; } @@ -433,28 +500,17 @@ recheck: return 0; } -static int mxt_unlock_bootloader(struct i2c_client *client) +static int mxt_unlock_bootloader(struct mxt_data *data) { + int ret; u8 buf[2]; buf[0] = MXT_UNLOCK_CMD_LSB; buf[1] = MXT_UNLOCK_CMD_MSB; - if (i2c_master_send(client, buf, 2) != 2) { - dev_err(&client->dev, "%s: i2c send failed\n", __func__); - return -EIO; - } - - return 0; -} - -static int mxt_fw_write(struct i2c_client *client, - const u8 *data, unsigned int frame_size) -{ - if (i2c_master_send(client, data, frame_size) != frame_size) { - dev_err(&client->dev, "%s: i2c send failed\n", __func__); - return -EIO; - } + ret = mxt_bootloader_write(data, buf, 2); + if (ret) + return ret; return 0; } @@ -1102,7 +1158,6 @@ done: static int mxt_load_fw(struct device *dev, const char *fn) { struct mxt_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; const struct firmware *fw = NULL; unsigned int frame_size; unsigned int pos = 0; @@ -1114,6 +1169,10 @@ static int mxt_load_fw(struct device *dev, const char *fn) return ret; } + ret = mxt_lookup_bootloader_address(data); + if (ret) + goto release_firmware; + /* Change to the bootloader mode */ data->in_bootloader = true; @@ -1123,12 +1182,6 @@ static int mxt_load_fw(struct device *dev, const char *fn) msleep(MXT_RESET_TIME); - /* Change to slave address of bootloader */ - if (client->addr == MXT_APP_LOW) - client->addr = MXT_BOOT_LOW; - else - client->addr = MXT_BOOT_HIGH; - reinit_completion(&data->bl_completion); ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD); @@ -1136,7 +1189,7 @@ static int mxt_load_fw(struct device *dev, const char *fn) goto disable_irq; /* Unlock bootloader */ - mxt_unlock_bootloader(client); + mxt_unlock_bootloader(data); while (pos < fw->size) { ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA); @@ -1151,7 +1204,9 @@ static int mxt_load_fw(struct device *dev, const char *fn) frame_size += 2; /* Write one frame to device */ - mxt_fw_write(client, fw->data + pos, frame_size); + ret = mxt_bootloader_write(data, fw->data + pos, frame_size); + if (ret) + goto disable_irq; ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS); if (ret) @@ -1181,13 +1236,6 @@ disable_irq: disable_irq(data->irq); release_firmware: release_firmware(fw); - - /* Change to slave address of application */ - if (client->addr == MXT_BOOT_LOW) - client->addr = MXT_APP_LOW; - else - client->addr = MXT_APP_HIGH; - return ret; } |