| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Atmel maXTouch Touchscreen driver |
| * |
| * Copyright (C) 2010 Samsung Electronics Co.Ltd |
| * Copyright (C) 2011-2014 Atmel Corporation |
| * Copyright (C) 2012 Google, Inc. |
| * Copyright (C) 2016 Zodiac Inflight Innovations |
| * |
| * Author: Joonyoung Shim <jy0922.shim@samsung.com> |
| */ |
| |
| #include <linux/acpi.h> |
| #include <linux/dmi.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/completion.h> |
| #include <linux/delay.h> |
| #include <linux/firmware.h> |
| #include <linux/i2c.h> |
| #include <linux/input/mt.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/of.h> |
| #include <linux/property.h> |
| #include <linux/slab.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/gpio/consumer.h> |
| #include <asm/unaligned.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/videobuf2-v4l2.h> |
| #include <media/videobuf2-vmalloc.h> |
| #include <dt-bindings/input/atmel-maxtouch.h> |
| |
| /* Firmware files */ |
| #define MXT_FW_NAME "maxtouch.fw" |
| #define MXT_CFG_NAME "maxtouch.cfg" |
| #define MXT_CFG_MAGIC "OBP_RAW V1" |
| |
| /* Registers */ |
| #define MXT_OBJECT_START 0x07 |
| #define MXT_OBJECT_SIZE 6 |
| #define MXT_INFO_CHECKSUM_SIZE 3 |
| #define MXT_MAX_BLOCK_WRITE 256 |
| |
| /* Object types */ |
| #define MXT_DEBUG_DIAGNOSTIC_T37 37 |
| #define MXT_GEN_MESSAGE_T5 5 |
| #define MXT_GEN_COMMAND_T6 6 |
| #define MXT_GEN_POWER_T7 7 |
| #define MXT_GEN_ACQUIRE_T8 8 |
| #define MXT_GEN_DATASOURCE_T53 53 |
| #define MXT_TOUCH_MULTI_T9 9 |
| #define MXT_TOUCH_KEYARRAY_T15 15 |
| #define MXT_TOUCH_PROXIMITY_T23 23 |
| #define MXT_TOUCH_PROXKEY_T52 52 |
| #define MXT_TOUCH_PTC_KEYS_T97 97 |
| #define MXT_PROCI_GRIPFACE_T20 20 |
| #define MXT_PROCG_NOISE_T22 22 |
| #define MXT_PROCI_ONETOUCH_T24 24 |
| #define MXT_PROCI_TWOTOUCH_T27 27 |
| #define MXT_PROCI_GRIP_T40 40 |
| #define MXT_PROCI_PALM_T41 41 |
| #define MXT_PROCI_TOUCHSUPPRESSION_T42 42 |
| #define MXT_PROCI_STYLUS_T47 47 |
| #define MXT_PROCG_NOISESUPPRESSION_T48 48 |
| #define MXT_SPT_COMMSCONFIG_T18 18 |
| #define MXT_SPT_GPIOPWM_T19 19 |
| #define MXT_SPT_SELFTEST_T25 25 |
| #define MXT_SPT_CTECONFIG_T28 28 |
| #define MXT_SPT_USERDATA_T38 38 |
| #define MXT_SPT_DIGITIZER_T43 43 |
| #define MXT_SPT_MESSAGECOUNT_T44 44 |
| #define MXT_SPT_CTECONFIG_T46 46 |
| #define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71 |
| #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100 |
| |
| /* MXT_GEN_MESSAGE_T5 object */ |
| #define MXT_RPTID_NOMSG 0xff |
| |
| /* MXT_GEN_COMMAND_T6 field */ |
| #define MXT_COMMAND_RESET 0 |
| #define MXT_COMMAND_BACKUPNV 1 |
| #define MXT_COMMAND_CALIBRATE 2 |
| #define MXT_COMMAND_REPORTALL 3 |
| #define MXT_COMMAND_DIAGNOSTIC 5 |
| |
| /* Define for T6 status byte */ |
| #define MXT_T6_STATUS_RESET BIT(7) |
| #define MXT_T6_STATUS_OFL BIT(6) |
| #define MXT_T6_STATUS_SIGERR BIT(5) |
| #define MXT_T6_STATUS_CAL BIT(4) |
| #define MXT_T6_STATUS_CFGERR BIT(3) |
| #define MXT_T6_STATUS_COMSERR BIT(2) |
| |
| /* MXT_GEN_POWER_T7 field */ |
| struct t7_config { |
| u8 idle; |
| u8 active; |
| } __packed; |
| |
| #define MXT_POWER_CFG_RUN 0 |
| #define MXT_POWER_CFG_DEEPSLEEP 1 |
| |
| /* MXT_TOUCH_MULTI_T9 field */ |
| #define MXT_T9_CTRL 0 |
| #define MXT_T9_XSIZE 3 |
| #define MXT_T9_YSIZE 4 |
| #define MXT_T9_ORIENT 9 |
| #define MXT_T9_RANGE 18 |
| |
| /* MXT_TOUCH_MULTI_T9 status */ |
| #define MXT_T9_UNGRIP BIT(0) |
| #define MXT_T9_SUPPRESS BIT(1) |
| #define MXT_T9_AMP BIT(2) |
| #define MXT_T9_VECTOR BIT(3) |
| #define MXT_T9_MOVE BIT(4) |
| #define MXT_T9_RELEASE BIT(5) |
| #define MXT_T9_PRESS BIT(6) |
| #define MXT_T9_DETECT BIT(7) |
| |
| struct t9_range { |
| __le16 x; |
| __le16 y; |
| } __packed; |
| |
| /* MXT_TOUCH_MULTI_T9 orient */ |
| #define MXT_T9_ORIENT_SWITCH BIT(0) |
| #define MXT_T9_ORIENT_INVERTX BIT(1) |
| #define MXT_T9_ORIENT_INVERTY BIT(2) |
| |
| /* MXT_SPT_COMMSCONFIG_T18 */ |
| #define MXT_COMMS_CTRL 0 |
| #define MXT_COMMS_CMD 1 |
| #define MXT_COMMS_RETRIGEN BIT(6) |
| |
| /* MXT_DEBUG_DIAGNOSTIC_T37 */ |
| #define MXT_DIAGNOSTIC_PAGEUP 0x01 |
| #define MXT_DIAGNOSTIC_DELTAS 0x10 |
| #define MXT_DIAGNOSTIC_REFS 0x11 |
| #define MXT_DIAGNOSTIC_SIZE 128 |
| |
| #define MXT_FAMILY_1386 160 |
| #define MXT1386_COLUMNS 3 |
| #define MXT1386_PAGES_PER_COLUMN 8 |
| |
| struct t37_debug { |
| #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
| u8 mode; |
| u8 page; |
| u8 data[MXT_DIAGNOSTIC_SIZE]; |
| #endif |
| }; |
| |
| /* Define for MXT_GEN_COMMAND_T6 */ |
| #define MXT_BOOT_VALUE 0xa5 |
| #define MXT_RESET_VALUE 0x01 |
| #define MXT_BACKUP_VALUE 0x55 |
| |
| /* T100 Multiple Touch Touchscreen */ |
| #define MXT_T100_CTRL 0 |
| #define MXT_T100_CFG1 1 |
| #define MXT_T100_TCHAUX 3 |
| #define MXT_T100_XSIZE 9 |
| #define MXT_T100_XRANGE 13 |
| #define MXT_T100_YSIZE 20 |
| #define MXT_T100_YRANGE 24 |
| |
| #define MXT_T100_CFG_SWITCHXY BIT(5) |
| #define MXT_T100_CFG_INVERTY BIT(6) |
| #define MXT_T100_CFG_INVERTX BIT(7) |
| |
| #define MXT_T100_TCHAUX_VECT BIT(0) |
| #define MXT_T100_TCHAUX_AMPL BIT(1) |
| #define MXT_T100_TCHAUX_AREA BIT(2) |
| |
| #define MXT_T100_DETECT BIT(7) |
| #define MXT_T100_TYPE_MASK 0x70 |
| |
| enum t100_type { |
| MXT_T100_TYPE_FINGER = 1, |
| MXT_T100_TYPE_PASSIVE_STYLUS = 2, |
| MXT_T100_TYPE_HOVERING_FINGER = 4, |
| MXT_T100_TYPE_GLOVE = 5, |
| MXT_T100_TYPE_LARGE_TOUCH = 6, |
| }; |
| |
| #define MXT_DISTANCE_ACTIVE_TOUCH 0 |
| #define MXT_DISTANCE_HOVERING 1 |
| |
| #define MXT_TOUCH_MAJOR_DEFAULT 1 |
| #define MXT_PRESSURE_DEFAULT 1 |
| |
| /* Delay times */ |
| #define MXT_BACKUP_TIME 50 /* msec */ |
| #define MXT_RESET_GPIO_TIME 20 /* msec */ |
| #define MXT_RESET_INVALID_CHG 100 /* msec */ |
| #define MXT_RESET_TIME 200 /* msec */ |
| #define MXT_RESET_TIMEOUT 3000 /* msec */ |
| #define MXT_CRC_TIMEOUT 1000 /* msec */ |
| #define MXT_FW_RESET_TIME 3000 /* msec */ |
| #define MXT_FW_CHG_TIMEOUT 300 /* msec */ |
| #define MXT_WAKEUP_TIME 25 /* msec */ |
| |
| /* Command to unlock bootloader */ |
| #define MXT_UNLOCK_CMD_MSB 0xaa |
| #define MXT_UNLOCK_CMD_LSB 0xdc |
| |
| /* Bootloader mode status */ |
| #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ |
| #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ |
| #define MXT_FRAME_CRC_CHECK 0x02 |
| #define MXT_FRAME_CRC_FAIL 0x03 |
| #define MXT_FRAME_CRC_PASS 0x04 |
| #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ |
| #define MXT_BOOT_STATUS_MASK 0x3f |
| #define MXT_BOOT_EXTENDED_ID BIT(5) |
| #define MXT_BOOT_ID_MASK 0x1f |
| |
| /* Touchscreen absolute values */ |
| #define MXT_MAX_AREA 0xff |
| |
| #define MXT_PIXELS_PER_MM 20 |
| |
| struct mxt_info { |
| u8 family_id; |
| u8 variant_id; |
| u8 version; |
| u8 build; |
| u8 matrix_xsize; |
| u8 matrix_ysize; |
| u8 object_num; |
| }; |
| |
| struct mxt_object { |
| u8 type; |
| u16 start_address; |
| u8 size_minus_one; |
| u8 instances_minus_one; |
| u8 num_report_ids; |
| } __packed; |
| |
| struct mxt_dbg { |
| u16 t37_address; |
| u16 diag_cmd_address; |
| struct t37_debug *t37_buf; |
| unsigned int t37_pages; |
| unsigned int t37_nodes; |
| |
| struct v4l2_device v4l2; |
| struct v4l2_pix_format format; |
| struct video_device vdev; |
| struct vb2_queue queue; |
| struct mutex lock; |
| int input; |
| }; |
| |
| enum v4l_dbg_inputs { |
| MXT_V4L_INPUT_DELTAS, |
| MXT_V4L_INPUT_REFS, |
| MXT_V4L_INPUT_MAX, |
| }; |
| |
| enum mxt_suspend_mode { |
| MXT_SUSPEND_DEEP_SLEEP = 0, |
| MXT_SUSPEND_T9_CTRL = 1, |
| }; |
| |
| /* Config update context */ |
| struct mxt_cfg { |
| u8 *raw; |
| size_t raw_size; |
| off_t raw_pos; |
| |
| u8 *mem; |
| size_t mem_size; |
| int start_ofs; |
| |
| struct mxt_info info; |
| }; |
| |
| /* Each client has this additional data */ |
| struct mxt_data { |
| struct i2c_client *client; |
| struct input_dev *input_dev; |
| char phys[64]; /* device physical location */ |
| struct mxt_object *object_table; |
| struct mxt_info *info; |
| void *raw_info_block; |
| unsigned int irq; |
| unsigned int max_x; |
| unsigned int max_y; |
| bool invertx; |
| bool inverty; |
| bool xy_switch; |
| u8 xsize; |
| u8 ysize; |
| bool in_bootloader; |
| u16 mem_size; |
| u8 t100_aux_ampl; |
| u8 t100_aux_area; |
| u8 t100_aux_vect; |
| u8 max_reportid; |
| u32 config_crc; |
| u32 info_crc; |
| u8 bootloader_addr; |
| u8 *msg_buf; |
| u8 t6_status; |
| bool update_input; |
| u8 last_message_count; |
| u8 num_touchids; |
| u8 multitouch; |
| struct t7_config t7_cfg; |
| struct mxt_dbg dbg; |
| struct regulator_bulk_data regulators[2]; |
| struct gpio_desc *reset_gpio; |
| struct gpio_desc *wake_gpio; |
| bool use_retrigen_workaround; |
| |
| /* Cached parameters from object table */ |
| u16 T5_address; |
| u8 T5_msg_size; |
| u8 T6_reportid; |
| u16 T6_address; |
| u16 T7_address; |
| u16 T71_address; |
| u8 T9_reportid_min; |
| u8 T9_reportid_max; |
| u8 T15_reportid_min; |
| u8 T15_reportid_max; |
| u16 T18_address; |
| u8 T19_reportid; |
| u16 T44_address; |
| u8 T97_reportid_min; |
| u8 T97_reportid_max; |
| u8 T100_reportid_min; |
| u8 T100_reportid_max; |
| |
| /* for fw update in bootloader */ |
| struct completion bl_completion; |
| |
| /* for reset handling */ |
| struct completion reset_completion; |
| |
| /* for config update handling */ |
| struct completion crc_completion; |
| |
| u32 *t19_keymap; |
| unsigned int t19_num_keys; |
| |
| u32 *t15_keymap; |
| unsigned int t15_num_keys; |
| |
| enum mxt_suspend_mode suspend_mode; |
| |
| u32 wakeup_method; |
| }; |
| |
| struct mxt_vb2_buffer { |
| struct vb2_buffer vb; |
| struct list_head list; |
| }; |
| |
| static size_t mxt_obj_size(const struct mxt_object *obj) |
| { |
| return obj->size_minus_one + 1; |
| } |
| |
| static size_t mxt_obj_instances(const struct mxt_object *obj) |
| { |
| return obj->instances_minus_one + 1; |
| } |
| |
| static bool mxt_object_readable(unsigned int type) |
| { |
| switch (type) { |
| case MXT_GEN_COMMAND_T6: |
| case MXT_GEN_POWER_T7: |
| case MXT_GEN_ACQUIRE_T8: |
| case MXT_GEN_DATASOURCE_T53: |
| case MXT_TOUCH_MULTI_T9: |
| case MXT_TOUCH_KEYARRAY_T15: |
| case MXT_TOUCH_PROXIMITY_T23: |
| case MXT_TOUCH_PROXKEY_T52: |
| case MXT_TOUCH_PTC_KEYS_T97: |
| case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
| case MXT_PROCI_GRIPFACE_T20: |
| case MXT_PROCG_NOISE_T22: |
| case MXT_PROCI_ONETOUCH_T24: |
| case MXT_PROCI_TWOTOUCH_T27: |
| case MXT_PROCI_GRIP_T40: |
| case MXT_PROCI_PALM_T41: |
| case MXT_PROCI_TOUCHSUPPRESSION_T42: |
| case MXT_PROCI_STYLUS_T47: |
| case MXT_PROCG_NOISESUPPRESSION_T48: |
| case MXT_SPT_COMMSCONFIG_T18: |
| case MXT_SPT_GPIOPWM_T19: |
| case MXT_SPT_SELFTEST_T25: |
| case MXT_SPT_CTECONFIG_T28: |
| case MXT_SPT_USERDATA_T38: |
| case MXT_SPT_DIGITIZER_T43: |
| case MXT_SPT_CTECONFIG_T46: |
| case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static void mxt_dump_message(struct mxt_data *data, u8 *message) |
| { |
| dev_dbg(&data->client->dev, "message: %*ph\n", |
| data->T5_msg_size, message); |
| } |
| |
| static int mxt_wait_for_completion(struct mxt_data *data, |
| struct completion *comp, |
| unsigned int timeout_ms) |
| { |
| struct device *dev = &data->client->dev; |
| unsigned long timeout = msecs_to_jiffies(timeout_ms); |
| long ret; |
| |
| ret = wait_for_completion_interruptible_timeout(comp, timeout); |
| if (ret < 0) { |
| return ret; |
| } else if (ret == 0) { |
| dev_err(dev, "Wait for completion timed out.\n"); |
| return -ETIMEDOUT; |
| } |
| 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, bool retry) |
| { |
| u8 appmode = data->client->addr; |
| u8 bootloader; |
| u8 family_id = data->info ? data->info->family_id : 0; |
| |
| switch (appmode) { |
| case 0x4a: |
| case 0x4b: |
| /* Chips after 1664S use different scheme */ |
| if (retry || family_id >= 0xa2) { |
| bootloader = appmode - 0x24; |
| break; |
| } |
| fallthrough; /* for normal case */ |
| 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_probe_bootloader(struct mxt_data *data, bool alt_address) |
| { |
| struct device *dev = &data->client->dev; |
| int error; |
| u8 val; |
| bool crc_failure; |
| |
| error = mxt_lookup_bootloader_address(data, alt_address); |
| if (error) |
| return error; |
| |
| error = mxt_bootloader_read(data, &val, 1); |
| if (error) |
| return error; |
| |
| /* Check app crc fail mode */ |
| crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL; |
| |
| dev_err(dev, "Detected bootloader, status:%02X%s\n", |
| val, crc_failure ? ", APP_CRC_FAIL" : ""); |
| |
| return 0; |
| } |
| |
| static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val) |
| { |
| struct device *dev = &data->client->dev; |
| u8 buf[3]; |
| |
| if (val & MXT_BOOT_EXTENDED_ID) { |
| if (mxt_bootloader_read(data, &buf[0], 3) != 0) { |
| dev_err(dev, "%s: i2c failure\n", __func__); |
| return val; |
| } |
| |
| dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]); |
| |
| return buf[0]; |
| } else { |
| dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK); |
| |
| return val; |
| } |
| } |
| |
| static int mxt_check_bootloader(struct mxt_data *data, unsigned int state, |
| bool wait) |
| { |
| struct device *dev = &data->client->dev; |
| u8 val; |
| int ret; |
| |
| recheck: |
| if (wait) { |
| /* |
| * In application update mode, the interrupt |
| * line signals state transitions. We must wait for the |
| * CHG assertion before reading the status byte. |
| * Once the status byte has been read, the line is deasserted. |
| */ |
| ret = mxt_wait_for_completion(data, &data->bl_completion, |
| MXT_FW_CHG_TIMEOUT); |
| if (ret) { |
| /* |
| * TODO: handle -ERESTARTSYS better by terminating |
| * fw update process before returning to userspace |
| * by writing length 0x000 to device (iff we are in |
| * WAITING_FRAME_DATA state). |
| */ |
| dev_err(dev, "Update wait error %d\n", ret); |
| return ret; |
| } |
| } |
| |
| ret = mxt_bootloader_read(data, &val, 1); |
| if (ret) |
| return ret; |
| |
| if (state == MXT_WAITING_BOOTLOAD_CMD) |
| val = mxt_get_bootloader_version(data, val); |
| |
| switch (state) { |
| case MXT_WAITING_BOOTLOAD_CMD: |
| case MXT_WAITING_FRAME_DATA: |
| case MXT_APP_CRC_FAIL: |
| val &= ~MXT_BOOT_STATUS_MASK; |
| break; |
| case MXT_FRAME_CRC_PASS: |
| if (val == MXT_FRAME_CRC_CHECK) { |
| goto recheck; |
| } else if (val == MXT_FRAME_CRC_FAIL) { |
| dev_err(dev, "Bootloader CRC fail\n"); |
| return -EINVAL; |
| } |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (val != state) { |
| dev_err(dev, "Invalid bootloader state %02X != %02X\n", |
| val, state); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock) |
| { |
| u8 buf[2]; |
| |
| if (unlock) { |
| buf[0] = MXT_UNLOCK_CMD_LSB; |
| buf[1] = MXT_UNLOCK_CMD_MSB; |
| } else { |
| buf[0] = 0x01; |
| buf[1] = 0x01; |
| } |
| |
| return mxt_bootloader_write(data, buf, sizeof(buf)); |
| } |
| |
| static bool mxt_wakeup_toggle(struct i2c_client *client, |
| bool wake_up, bool in_i2c) |
| { |
| struct mxt_data *data = i2c_get_clientdata(client); |
| |
| switch (data->wakeup_method) { |
| case ATMEL_MXT_WAKEUP_I2C_SCL: |
| if (!in_i2c) |
| return false; |
| break; |
| |
| case ATMEL_MXT_WAKEUP_GPIO: |
| if (in_i2c) |
| return false; |
| |
| gpiod_set_value(data->wake_gpio, wake_up); |
| break; |
| |
| default: |
| return false; |
| } |
| |
| if (wake_up) { |
| dev_dbg(&client->dev, "waking up controller\n"); |
| |
| msleep(MXT_WAKEUP_TIME); |
| } |
| |
| return true; |
| } |
| |
| static int __mxt_read_reg(struct i2c_client *client, |
| u16 reg, u16 len, void *val) |
| { |
| struct i2c_msg xfer[2]; |
| bool retried = false; |
| u8 buf[2]; |
| int ret; |
| |
| buf[0] = reg & 0xff; |
| buf[1] = (reg >> 8) & 0xff; |
| |
| /* Write register */ |
| xfer[0].addr = client->addr; |
| xfer[0].flags = 0; |
| xfer[0].len = 2; |
| xfer[0].buf = buf; |
| |
| /* Read data */ |
| xfer[1].addr = client->addr; |
| xfer[1].flags = I2C_M_RD; |
| xfer[1].len = len; |
| xfer[1].buf = val; |
| |
| retry: |
| ret = i2c_transfer(client->adapter, xfer, 2); |
| if (ret == 2) { |
| ret = 0; |
| } else if (!retried && mxt_wakeup_toggle(client, true, true)) { |
| retried = true; |
| goto retry; |
| } else { |
| if (ret >= 0) |
| ret = -EIO; |
| dev_err(&client->dev, "%s: i2c transfer failed (%d)\n", |
| __func__, ret); |
| } |
| |
| return ret; |
| } |
| |
| static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, |
| const void *val) |
| { |
| bool retried = false; |
| u8 *buf; |
| size_t count; |
| int ret; |
| |
| count = len + 2; |
| buf = kmalloc(count, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| buf[0] = reg & 0xff; |
| buf[1] = (reg >> 8) & 0xff; |
| memcpy(&buf[2], val, len); |
| |
| retry: |
| ret = i2c_master_send(client, buf, count); |
| if (ret == count) { |
| ret = 0; |
| } else if (!retried && mxt_wakeup_toggle(client, true, true)) { |
| retried = true; |
| goto retry; |
| } else { |
| if (ret >= 0) |
| ret = -EIO; |
| dev_err(&client->dev, "%s: i2c send failed (%d)\n", |
| __func__, ret); |
| } |
| |
| kfree(buf); |
| return ret; |
| } |
| |
| static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) |
| { |
| return __mxt_write_reg(client, reg, 1, &val); |
| } |
| |
| static struct mxt_object * |
| mxt_get_object(struct mxt_data *data, u8 type) |
| { |
| struct mxt_object *object; |
| int i; |
| |
| for (i = 0; i < data->info->object_num; i++) { |
| object = data->object_table + i; |
| if (object->type == type) |
| return object; |
| } |
| |
| dev_warn(&data->client->dev, "Invalid object type T%u\n", type); |
| return NULL; |
| } |
| |
| static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) |
| { |
| struct device *dev = &data->client->dev; |
| u8 status = msg[1]; |
| u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16); |
| |
| if (crc != data->config_crc) { |
| data->config_crc = crc; |
| dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc); |
| } |
| |
| complete(&data->crc_completion); |
| |
| /* Detect reset */ |
| if (status & MXT_T6_STATUS_RESET) |
| complete(&data->reset_completion); |
| |
| /* Output debug if status has changed */ |
| if (status != data->t6_status) |
| dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n", |
| status, |
| status == 0 ? " OK" : "", |
| status & MXT_T6_STATUS_RESET ? " RESET" : "", |
| status & MXT_T6_STATUS_OFL ? " OFL" : "", |
| status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "", |
| status & MXT_T6_STATUS_CAL ? " CAL" : "", |
| status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "", |
| status & MXT_T6_STATUS_COMSERR ? " COMSERR" : ""); |
| |
| /* Save current status */ |
| data->t6_status = status; |
| } |
| |
| static int mxt_write_object(struct mxt_data *data, |
| u8 type, u8 offset, u8 val) |
| { |
| struct mxt_object *object; |
| u16 reg; |
| |
| object = mxt_get_object(data, type); |
| if (!object || offset >= mxt_obj_size(object)) |
| return -EINVAL; |
| |
| reg = object->start_address; |
| return mxt_write_reg(data->client, reg + offset, val); |
| } |
| |
| static void mxt_input_button(struct mxt_data *data, u8 *message) |
| { |
| struct input_dev *input = data->input_dev; |
| int i; |
| |
| for (i = 0; i < data->t19_num_keys; i++) { |
| if (data->t19_keymap[i] == KEY_RESERVED) |
| continue; |
| |
| /* Active-low switch */ |
| input_report_key(input, data->t19_keymap[i], |
| !(message[1] & BIT(i))); |
| } |
| } |
| |
| static void mxt_input_sync(struct mxt_data *data) |
| { |
| input_mt_report_pointer_emulation(data->input_dev, |
| data->t19_num_keys); |
| input_sync(data->input_dev); |
| } |
| |
| static void mxt_proc_t9_message(struct mxt_data *data, u8 *message) |
| { |
| struct device *dev = &data->client->dev; |
| struct input_dev *input_dev = data->input_dev; |
| int id; |
| u8 status; |
| int x; |
| int y; |
| int area; |
| int amplitude; |
| |
| id = message[0] - data->T9_reportid_min; |
| status = message[1]; |
| x = (message[2] << 4) | ((message[4] >> 4) & 0xf); |
| y = (message[3] << 4) | ((message[4] & 0xf)); |
| |
| /* Handle 10/12 bit switching */ |
| if (data->max_x < 1024) |
| x >>= 2; |
| if (data->max_y < 1024) |
| y >>= 2; |
| |
| area = message[5]; |
| amplitude = message[6]; |
| |
| dev_dbg(dev, |
| "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n", |
| id, |
| (status & MXT_T9_DETECT) ? 'D' : '.', |
| (status & MXT_T9_PRESS) ? 'P' : '.', |
| (status & MXT_T9_RELEASE) ? 'R' : '.', |
| (status & MXT_T9_MOVE) ? 'M' : '.', |
| (status & MXT_T9_VECTOR) ? 'V' : '.', |
| (status & MXT_T9_AMP) ? 'A' : '.', |
| (status & MXT_T9_SUPPRESS) ? 'S' : '.', |
| (status & MXT_T9_UNGRIP) ? 'U' : '.', |
| x, y, area, amplitude); |
| |
| input_mt_slot(input_dev, id); |
| |
| if (status & MXT_T9_DETECT) { |
| /* |
| * Multiple bits may be set if the host is slow to read |
| * the status messages, indicating all the events that |
| * have happened. |
| */ |
| if (status & MXT_T9_RELEASE) { |
| input_mt_report_slot_inactive(input_dev); |
| mxt_input_sync(data); |
| } |
| |
| /* if active, pressure must be non-zero */ |
| if (!amplitude) |
| amplitude = MXT_PRESSURE_DEFAULT; |
| |
| /* Touch active */ |
| input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1); |
| input_report_abs(input_dev, ABS_MT_POSITION_X, x); |
| input_report_abs(input_dev, ABS_MT_POSITION_Y, y); |
| input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude); |
| input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area); |
| } else { |
| /* Touch no longer active, close out slot */ |
| input_mt_report_slot_inactive(input_dev); |
| } |
| |
| data->update_input = true; |
| } |
| |
| static void mxt_proc_t15_messages(struct mxt_data *data, u8 *message) |
| { |
| struct input_dev *input_dev = data->input_dev; |
| unsigned long keystates = get_unaligned_le32(&message[2]); |
| int key; |
| |
| for (key = 0; key < data->t15_num_keys; key++) |
| input_report_key(input_dev, data->t15_keymap[key], |
| keystates & BIT(key)); |
| |
| data->update_input = true; |
| } |
| |
| static void mxt_proc_t97_messages(struct mxt_data *data, u8 *message) |
| { |
| mxt_proc_t15_messages(data, message); |
| } |
| |
| static void mxt_proc_t100_message(struct mxt_data *data, u8 *message) |
| { |
| struct device *dev = &data->client->dev; |
| struct input_dev *input_dev = data->input_dev; |
| int id; |
| u8 status; |
| u8 type = 0; |
| u16 x; |
| u16 y; |
| int distance = 0; |
| int tool = 0; |
| u8 major = 0; |
| u8 pressure = 0; |
| u8 orientation = 0; |
| |
| id = message[0] - data->T100_reportid_min - 2; |
| |
| /* ignore SCRSTATUS events */ |
| if (id < 0) |
| return; |
| |
| status = message[1]; |
| x = get_unaligned_le16(&message[2]); |
| y = get_unaligned_le16(&message[4]); |
| |
| if (status & MXT_T100_DETECT) { |
| type = (status & MXT_T100_TYPE_MASK) >> 4; |
| |
| switch (type) { |
| case MXT_T100_TYPE_HOVERING_FINGER: |
| tool = MT_TOOL_FINGER; |
| distance = MXT_DISTANCE_HOVERING; |
| |
| if (data->t100_aux_vect) |
| orientation = message[data->t100_aux_vect]; |
| |
| break; |
| |
| case MXT_T100_TYPE_FINGER: |
| case MXT_T100_TYPE_GLOVE: |
| tool = MT_TOOL_FINGER; |
| distance = MXT_DISTANCE_ACTIVE_TOUCH; |
| |
| if (data->t100_aux_area) |
| major = message[data->t100_aux_area]; |
| |
| if (data->t100_aux_ampl) |
| pressure = message[data->t100_aux_ampl]; |
| |
| if (data->t100_aux_vect) |
| orientation = message[data->t100_aux_vect]; |
| |
| break; |
| |
| case MXT_T100_TYPE_PASSIVE_STYLUS: |
| tool = MT_TOOL_PEN; |
| |
| /* |
| * Passive stylus is reported with size zero so |
| * hardcode. |
| */ |
| major = MXT_TOUCH_MAJOR_DEFAULT; |
| |
| if (data->t100_aux_ampl) |
| pressure = message[data->t100_aux_ampl]; |
| |
| break; |
| |
| case MXT_T100_TYPE_LARGE_TOUCH: |
| /* Ignore suppressed touch */ |
| break; |
| |
| default: |
| dev_dbg(dev, "Unexpected T100 type\n"); |
| return; |
| } |
| } |
| |
| /* |
| * Values reported should be non-zero if tool is touching the |
| * device |
| */ |
| if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER) |
| pressure = MXT_PRESSURE_DEFAULT; |
| |
| input_mt_slot(input_dev, id); |
| |
| if (status & MXT_T100_DETECT) { |
| dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n", |
| id, type, x, y, major, pressure, orientation); |
| |
| input_mt_report_slot_state(input_dev, tool, 1); |
| input_report_abs(input_dev, ABS_MT_POSITION_X, x); |
| input_report_abs(input_dev, ABS_MT_POSITION_Y, y); |
| input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major); |
| input_report_abs(input_dev, ABS_MT_PRESSURE, pressure); |
| input_report_abs(input_dev, ABS_MT_DISTANCE, distance); |
| input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation); |
| } else { |
| dev_dbg(dev, "[%u] release\n", id); |
| |
| /* close out slot */ |
| input_mt_report_slot_inactive(input_dev); |
| } |
| |
| data->update_input = true; |
| } |
| |
| static int mxt_proc_message(struct mxt_data *data, u8 *message) |
| { |
| u8 report_id = message[0]; |
| |
| if (report_id == MXT_RPTID_NOMSG) |
| return 0; |
| |
| if (report_id == data->T6_reportid) { |
| mxt_proc_t6_messages(data, message); |
| } else if (!data->input_dev) { |
| /* |
| * Do not report events if input device |
| * is not yet registered. |
| */ |
| mxt_dump_message(data, message); |
| } else if (report_id >= data->T9_reportid_min && |
| report_id <= data->T9_reportid_max) { |
| mxt_proc_t9_message(data, message); |
| } else if (report_id >= data->T15_reportid_min && |
| report_id <= data->T15_reportid_max) { |
| mxt_proc_t15_messages(data, message); |
| } else if (report_id >= data->T97_reportid_min && |
| report_id <= data->T97_reportid_max) { |
| mxt_proc_t97_messages(data, message); |
| } else if (report_id >= data->T100_reportid_min && |
| report_id <= data->T100_reportid_max) { |
| mxt_proc_t100_message(data, message); |
| } else if (report_id == data->T19_reportid) { |
| mxt_input_button(data, message); |
| data->update_input = true; |
| } else { |
| mxt_dump_message(data, message); |
| } |
| |
| return 1; |
| } |
| |
| static int mxt_read_and_process_messages(struct mxt_data *data, u8 count) |
| { |
| struct device *dev = &data->client->dev; |
| int ret; |
| int i; |
| u8 num_valid = 0; |
| |
| /* Safety check for msg_buf */ |
| if (count > data->max_reportid) |
| return -EINVAL; |
| |
| /* Process remaining messages if necessary */ |
| ret = __mxt_read_reg(data->client, data->T5_address, |
| data->T5_msg_size * count, data->msg_buf); |
| if (ret) { |
| dev_err(dev, "Failed to read %u messages (%d)\n", count, ret); |
| return ret; |
| } |
| |
| for (i = 0; i < count; i++) { |
| ret = mxt_proc_message(data, |
| data->msg_buf + data->T5_msg_size * i); |
| |
| if (ret == 1) |
| num_valid++; |
| } |
| |
| /* return number of messages read */ |
| return num_valid; |
| } |
| |
| static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) |
| { |
| struct device *dev = &data->client->dev; |
| int ret; |
| u8 count, num_left; |
| |
| /* Read T44 and T5 together */ |
| ret = __mxt_read_reg(data->client, data->T44_address, |
| data->T5_msg_size + 1, data->msg_buf); |
| if (ret) { |
| dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret); |
| return IRQ_NONE; |
| } |
| |
| count = data->msg_buf[0]; |
| |
| /* |
| * This condition may be caused by the CHG line being configured in |
| * Mode 0. It results in unnecessary I2C operations but it is benign. |
| */ |
| if (count == 0) |
| return IRQ_NONE; |
| |
| if (count > data->max_reportid) { |
| dev_warn(dev, "T44 count %d exceeded max report id\n", count); |
| count = data->max_reportid; |
| } |
| |
| /* Process first message */ |
| ret = mxt_proc_message(data, data->msg_buf + 1); |
| if (ret < 0) { |
| dev_warn(dev, "Unexpected invalid message\n"); |
| return IRQ_NONE; |
| } |
| |
| num_left = count - 1; |
| |
| /* Process remaining messages if necessary */ |
| if (num_left) { |
| ret = mxt_read_and_process_messages(data, num_left); |
| if (ret < 0) |
| goto end; |
| else if (ret != num_left) |
| dev_warn(dev, "Unexpected invalid message\n"); |
| } |
| |
| end: |
| if (data->update_input) { |
| mxt_input_sync(data); |
| data->update_input = false; |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int mxt_process_messages_until_invalid(struct mxt_data *data) |
| { |
| struct device *dev = &data->client->dev; |
| int count, read; |
| u8 tries = 2; |
| |
| count = data->max_reportid; |
| |
| /* Read messages until we force an invalid */ |
| do { |
| read = mxt_read_and_process_messages(data, count); |
| if (read < count) |
| return 0; |
| } while (--tries); |
| |
| if (data->update_input) { |
| mxt_input_sync(data); |
| data->update_input = false; |
| } |
| |
| dev_err(dev, "CHG pin isn't cleared\n"); |
| return -EBUSY; |
| } |
| |
| static irqreturn_t mxt_process_messages(struct mxt_data *data) |
| { |
| int total_handled, num_handled; |
| u8 count = data->last_message_count; |
| |
| if (count < 1 || count > data->max_reportid) |
| count = 1; |
| |
| /* include final invalid message */ |
| total_handled = mxt_read_and_process_messages(data, count + 1); |
| if (total_handled < 0) |
| return IRQ_NONE; |
| /* if there were invalid messages, then we are done */ |
| else if (total_handled <= count) |
| goto update_count; |
| |
| /* keep reading two msgs until one is invalid or reportid limit */ |
| do { |
| num_handled = mxt_read_and_process_messages(data, 2); |
| if (num_handled < 0) |
| return IRQ_NONE; |
| |
| total_handled += num_handled; |
| |
| if (num_handled < 2) |
| break; |
| } while (total_handled < data->num_touchids); |
| |
| update_count: |
| data->last_message_count = total_handled; |
| |
| if (data->update_input) { |
| mxt_input_sync(data); |
| data->update_input = false; |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mxt_interrupt(int irq, void *dev_id) |
| { |
| struct mxt_data *data = dev_id; |
| |
| if (data->in_bootloader) { |
| /* bootloader state transition completion */ |
| complete(&data->bl_completion); |
| return IRQ_HANDLED; |
| } |
| |
| if (!data->object_table) |
| return IRQ_HANDLED; |
| |
| if (data->T44_address) { |
| return mxt_process_messages_t44(data); |
| } else { |
| return mxt_process_messages(data); |
| } |
| } |
| |
| static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, |
| u8 value, bool wait) |
| { |
| u16 reg; |
| u8 command_register; |
| int timeout_counter = 0; |
| int ret; |
| |
| reg = data->T6_address + cmd_offset; |
| |
| ret = mxt_write_reg(data->client, reg, value); |
| if (ret) |
| return ret; |
| |
| if (!wait) |
| return 0; |
| |
| do { |
| msleep(20); |
| ret = __mxt_read_reg(data->client, reg, 1, &command_register); |
| if (ret) |
| return ret; |
| } while (command_register != 0 && timeout_counter++ <= 100); |
| |
| if (timeout_counter > 100) { |
| dev_err(&data->client->dev, "Command failed!\n"); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_acquire_irq(struct mxt_data *data) |
| { |
| int error; |
| |
| enable_irq(data->irq); |
| |
| if (data->use_retrigen_workaround) { |
| error = mxt_process_messages_until_invalid(data); |
| if (error) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_soft_reset(struct mxt_data *data) |
| { |
| struct device *dev = &data->client->dev; |
| int ret = 0; |
| |
| dev_info(dev, "Resetting device\n"); |
| |
| disable_irq(data->irq); |
| |
| reinit_completion(&data->reset_completion); |
| |
| ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false); |
| if (ret) |
| return ret; |
| |
| /* Ignore CHG line for 100ms after reset */ |
| msleep(MXT_RESET_INVALID_CHG); |
| |
| mxt_acquire_irq(data); |
| |
| ret = mxt_wait_for_completion(data, &data->reset_completion, |
| MXT_RESET_TIMEOUT); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value) |
| { |
| /* |
| * On failure, CRC is set to 0 and config will always be |
| * downloaded. |
| */ |
| data->config_crc = 0; |
| reinit_completion(&data->crc_completion); |
| |
| mxt_t6_command(data, cmd, value, true); |
| |
| /* |
| * Wait for crc message. On failure, CRC is set to 0 and config will |
| * always be downloaded. |
| */ |
| mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT); |
| } |
| |
| static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte) |
| { |
| static const unsigned int crcpoly = 0x80001B; |
| u32 result; |
| u32 data_word; |
| |
| data_word = (secondbyte << 8) | firstbyte; |
| result = ((*crc << 1) ^ data_word); |
| |
| if (result & 0x1000000) |
| result ^= crcpoly; |
| |
| *crc = result; |
| } |
| |
| static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off) |
| { |
| u32 crc = 0; |
| u8 *ptr = base + start_off; |
| u8 *last_val = base + end_off - 1; |
| |
| if (end_off < start_off) |
| return -EINVAL; |
| |
| while (ptr < last_val) { |
| mxt_calc_crc24(&crc, *ptr, *(ptr + 1)); |
| ptr += 2; |
| } |
| |
| /* if len is odd, fill the last byte with 0 */ |
| if (ptr == last_val) |
| mxt_calc_crc24(&crc, *ptr, 0); |
| |
| /* Mask to 24-bit */ |
| crc &= 0x00FFFFFF; |
| |
| return crc; |
| } |
| |
| static int mxt_check_retrigen(struct mxt_data *data) |
| { |
| struct i2c_client *client = data->client; |
| int error; |
| int val; |
| struct irq_data *irqd; |
| |
| data->use_retrigen_workaround = false; |
| |
| irqd = irq_get_irq_data(data->irq); |
| if (!irqd) |
| return -EINVAL; |
| |
| if (irqd_is_level_type(irqd)) |
| return 0; |
| |
| if (data->T18_address) { |
| error = __mxt_read_reg(client, |
| data->T18_address + MXT_COMMS_CTRL, |
| 1, &val); |
| if (error) |
| return error; |
| |
| if (val & MXT_COMMS_RETRIGEN) |
| return 0; |
| } |
| |
| dev_warn(&client->dev, "Enabling RETRIGEN workaround\n"); |
| data->use_retrigen_workaround = true; |
| return 0; |
| } |
| |
| static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) |
| { |
| struct device *dev = &data->client->dev; |
| struct mxt_object *object; |
| unsigned int type, instance, size, byte_offset; |
| int offset; |
| int ret; |
| int i; |
| u16 reg; |
| u8 val; |
| |
| while (cfg->raw_pos < cfg->raw_size) { |
| /* Read type, instance, length */ |
| ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n", |
| &type, &instance, &size, &offset); |
| if (ret == 0) { |
| /* EOF */ |
| break; |
| } else if (ret != 3) { |
| dev_err(dev, "Bad format: failed to parse object\n"); |
| return -EINVAL; |
| } |
| cfg->raw_pos += offset; |
| |
| object = mxt_get_object(data, type); |
| if (!object) { |
| /* Skip object */ |
| for (i = 0; i < size; i++) { |
| ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n", |
| &val, &offset); |
| if (ret != 1) { |
| dev_err(dev, "Bad format in T%d at %d\n", |
| type, i); |
| return -EINVAL; |
| } |
| cfg->raw_pos += offset; |
| } |
| continue; |
| } |
| |
| if (size > mxt_obj_size(object)) { |
| /* |
| * Either we are in fallback mode due to wrong |
| * config or config from a later fw version, |
| * or the file is corrupt or hand-edited. |
| */ |
| dev_warn(dev, "Discarding %zu byte(s) in T%u\n", |
| size - mxt_obj_size(object), type); |
| } else if (mxt_obj_size(object) > size) { |
| /* |
| * If firmware is upgraded, new bytes may be added to |
| * end of objects. It is generally forward compatible |
| * to zero these bytes - previous behaviour will be |
| * retained. However this does invalidate the CRC and |
| * will force fallback mode until the configuration is |
| * updated. We warn here but do nothing else - the |
| * malloc has zeroed the entire configuration. |
| */ |
| dev_warn(dev, "Zeroing %zu byte(s) in T%d\n", |
| mxt_obj_size(object) - size, type); |
| } |
| |
| if (instance >= mxt_obj_instances(object)) { |
| dev_err(dev, "Object instances exceeded!\n"); |
| return -EINVAL; |
| } |
| |
| reg = object->start_address + mxt_obj_size(object) * instance; |
| |
| for (i = 0; i < size; i++) { |
| ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n", |
| &val, |
| &offset); |
| if (ret != 1) { |
| dev_err(dev, "Bad format in T%d at %d\n", |
| type, i); |
| return -EINVAL; |
| } |
| cfg->raw_pos += offset; |
| |
| if (i > mxt_obj_size(object)) |
| continue; |
| |
| byte_offset = reg + i - cfg->start_ofs; |
| |
| if (byte_offset >= 0 && byte_offset < cfg->mem_size) { |
| *(cfg->mem + byte_offset) = val; |
| } else { |
| dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n", |
| reg, object->type, byte_offset); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) |
| { |
| unsigned int byte_offset = 0; |
| int error; |
| |
| /* Write configuration as blocks */ |
| while (byte_offset < cfg->mem_size) { |
| unsigned int size = cfg->mem_size - byte_offset; |
| |
| if (size > MXT_MAX_BLOCK_WRITE) |
| size = MXT_MAX_BLOCK_WRITE; |
| |
| error = __mxt_write_reg(data->client, |
| cfg->start_ofs + byte_offset, |
| size, cfg->mem + byte_offset); |
| if (error) { |
| dev_err(&data->client->dev, |
| "Config write error, ret=%d\n", error); |
| return error; |
| } |
| |
| byte_offset += size; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_init_t7_power_cfg(struct mxt_data *data); |
| |
| /* |
| * mxt_update_cfg - download configuration to chip |
| * |
| * Atmel Raw Config File Format |
| * |
| * The first four lines of the raw config file contain: |
| * 1) Version |
| * 2) Chip ID Information (first 7 bytes of device memory) |
| * 3) Chip Information Block 24-bit CRC Checksum |
| * 4) Chip Configuration 24-bit CRC Checksum |
| * |
| * The rest of the file consists of one line per object instance: |
| * <TYPE> <INSTANCE> <SIZE> <CONTENTS> |
| * |
| * <TYPE> - 2-byte object type as hex |
| * <INSTANCE> - 2-byte object instance number as hex |
| * <SIZE> - 2-byte object size as hex |
| * <CONTENTS> - array of <SIZE> 1-byte hex values |
| */ |
| static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw) |
| { |
| struct device *dev = &data->client->dev; |
| struct mxt_cfg cfg; |
| int ret; |
| int offset; |
| int i; |
| u32 info_crc, config_crc, calculated_crc; |
| u16 crc_start = 0; |
| |
| /* Make zero terminated copy of the OBP_RAW file */ |
| cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL); |
| if (!cfg.raw) |
| return -ENOMEM; |
| |
| cfg.raw_size = fw->size; |
| |
| mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1); |
| |
| if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) { |
| dev_err(dev, "Unrecognised config file\n"); |
| ret = -EINVAL; |
| goto release_raw; |
| } |
| |
| cfg.raw_pos = strlen(MXT_CFG_MAGIC); |
| |
| /* Load information block and check */ |
| for (i = 0; i < sizeof(struct mxt_info); i++) { |
| ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n", |
| (unsigned char *)&cfg.info + i, |
| &offset); |
| if (ret != 1) { |
| dev_err(dev, "Bad format\n"); |
| ret = -EINVAL; |
| goto release_raw; |
| } |
| |
| cfg.raw_pos += offset; |
| } |
| |
| if (cfg.info.family_id != data->info->family_id) { |
| dev_err(dev, "Family ID mismatch!\n"); |
| ret = -EINVAL; |
| goto release_raw; |
| } |
| |
| if (cfg.info.variant_id != data->info->variant_id) { |
| dev_err(dev, "Variant ID mismatch!\n"); |
| ret = -EINVAL; |
| goto release_raw; |
| } |
| |
| /* Read CRCs */ |
| ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &info_crc, &offset); |
| if (ret != 1) { |
| dev_err(dev, "Bad format: failed to parse Info CRC\n"); |
| ret = -EINVAL; |
| goto release_raw; |
| } |
| cfg.raw_pos += offset; |
| |
| ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &config_crc, &offset); |
| if (ret != 1) { |
| dev_err(dev, "Bad format: failed to parse Config CRC\n"); |
| ret = -EINVAL; |
| goto release_raw; |
| } |
| cfg.raw_pos += offset; |
| |
| /* |
| * The Info Block CRC is calculated over mxt_info and the object |
| * table. If it does not match then we are trying to load the |
| * configuration from a different chip or firmware version, so |
| * the configuration CRC is invalid anyway. |
| */ |
| if (info_crc == data->info_crc) { |
| if (config_crc == 0 || data->config_crc == 0) { |
| dev_info(dev, "CRC zero, attempting to apply config\n"); |
| } else if (config_crc == data->config_crc) { |
| dev_dbg(dev, "Config CRC 0x%06X: OK\n", |
| data->config_crc); |
| ret = 0; |
| goto release_raw; |
| } else { |
| dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n", |
| data->config_crc, config_crc); |
| } |
| } else { |
| dev_warn(dev, |
| "Warning: Info CRC error - device=0x%06X file=0x%06X\n", |
| data->info_crc, info_crc); |
| } |
| |
| /* Malloc memory to store configuration */ |
| cfg.start_ofs = MXT_OBJECT_START + |
| data->info->object_num * sizeof(struct mxt_object) + |
| MXT_INFO_CHECKSUM_SIZE; |
| cfg.mem_size = data->mem_size - cfg.start_ofs; |
| cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL); |
| if (!cfg.mem) { |
| ret = -ENOMEM; |
| goto release_raw; |
| } |
| |
| ret = mxt_prepare_cfg_mem(data, &cfg); |
| if (ret) |
| goto release_mem; |
| |
| /* Calculate crc of the received configs (not the raw config file) */ |
| if (data->T71_address) |
| crc_start = data->T71_address; |
| else if (data->T7_address) |
| crc_start = data->T7_address; |
| else |
| dev_warn(dev, "Could not find CRC start\n"); |
| |
| if (crc_start > cfg.start_ofs) { |
| calculated_crc = mxt_calculate_crc(cfg.mem, |
| crc_start - cfg.start_ofs, |
| cfg.mem_size); |
| |
| if (config_crc > 0 && config_crc != calculated_crc) |
| dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n", |
| calculated_crc, config_crc); |
| } |
| |
| ret = mxt_upload_cfg_mem(data, &cfg); |
| if (ret) |
| goto release_mem; |
| |
| mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); |
| |
| ret = mxt_check_retrigen(data); |
| if (ret) |
| goto release_mem; |
| |
| ret = mxt_soft_reset(data); |
| if (ret) |
| goto release_mem; |
| |
| dev_info(dev, "Config successfully updated\n"); |
| |
| /* T7 config may have changed */ |
| mxt_init_t7_power_cfg(data); |
| |
| release_mem: |
| kfree(cfg.mem); |
| release_raw: |
| kfree(cfg.raw); |
| return ret; |
| } |
| |
| static void mxt_free_input_device(struct mxt_data *data) |
| { |
| if (data->input_dev) { |
| input_unregister_device(data->input_dev); |
| data->input_dev = NULL; |
| } |
| } |
| |
| static void mxt_free_object_table(struct mxt_data *data) |
| { |
| #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
| video_unregister_device(&data->dbg.vdev); |
| v4l2_device_unregister(&data->dbg.v4l2); |
| #endif |
| data->object_table = NULL; |
| data->info = NULL; |
| kfree(data->raw_info_block); |
| data->raw_info_block = NULL; |
| kfree(data->msg_buf); |
| data->msg_buf = NULL; |
| data->T5_address = 0; |
| data->T5_msg_size = 0; |
| data->T6_reportid = 0; |
| data->T7_address = 0; |
| data->T71_address = 0; |
| data->T9_reportid_min = 0; |
| data->T9_reportid_max = 0; |
| data->T15_reportid_min = 0; |
| data->T15_reportid_max = 0; |
| data->T18_address = 0; |
| data->T19_reportid = 0; |
| data->T44_address = 0; |
| data->T97_reportid_min = 0; |
| data->T97_reportid_max = 0; |
| data->T100_reportid_min = 0; |
| data->T100_reportid_max = 0; |
| data->max_reportid = 0; |
| } |
| |
| static int mxt_parse_object_table(struct mxt_data *data, |
| struct mxt_object *object_table) |
| { |
| struct i2c_client *client = data->client; |
| int i; |
| u8 reportid; |
| u16 end_address; |
| |
| /* Valid Report IDs start counting from 1 */ |
| reportid = 1; |
| data->mem_size = 0; |
| for (i = 0; i < data->info->object_num; i++) { |
| struct mxt_object *object = object_table + i; |
| u8 min_id, max_id; |
| |
| le16_to_cpus(&object->start_address); |
| |
| if (object->num_report_ids) { |
| min_id = reportid; |
| reportid += object->num_report_ids * |
| mxt_obj_instances(object); |
| max_id = reportid - 1; |
| } else { |
| min_id = 0; |
| max_id = 0; |
| } |
| |
| dev_dbg(&data->client->dev, |
| "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n", |
| object->type, object->start_address, |
| mxt_obj_size(object), mxt_obj_instances(object), |
| min_id, max_id); |
| |
| switch (object->type) { |
| case MXT_GEN_MESSAGE_T5: |
| if (data->info->family_id == 0x80 && |
| data->info->version < 0x20) { |
| /* |
| * On mXT224 firmware versions prior to V2.0 |
| * read and discard unused CRC byte otherwise |
| * DMA reads are misaligned. |
| */ |
| data->T5_msg_size = mxt_obj_size(object); |
| } else { |
| /* CRC not enabled, so skip last byte */ |
| data->T5_msg_size = mxt_obj_size(object) - 1; |
| } |
| data->T5_address = object->start_address; |
| break; |
| case MXT_GEN_COMMAND_T6: |
| data->T6_reportid = min_id; |
| data->T6_address = object->start_address; |
| break; |
| case MXT_GEN_POWER_T7: |
| data->T7_address = object->start_address; |
| break; |
| case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: |
| data->T71_address = object->start_address; |
| break; |
| case MXT_TOUCH_MULTI_T9: |
| data->multitouch = MXT_TOUCH_MULTI_T9; |
| /* Only handle messages from first T9 instance */ |
| data->T9_reportid_min = min_id; |
| data->T9_reportid_max = min_id + |
| object->num_report_ids - 1; |
| data->num_touchids = object->num_report_ids; |
| break; |
| case MXT_TOUCH_KEYARRAY_T15: |
| data->T15_reportid_min = min_id; |
| data->T15_reportid_max = max_id; |
| break; |
| case MXT_SPT_COMMSCONFIG_T18: |
| data->T18_address = object->start_address; |
| break; |
| case MXT_SPT_MESSAGECOUNT_T44: |
| data->T44_address = object->start_address; |
| break; |
| case MXT_SPT_GPIOPWM_T19: |
| data->T19_reportid = min_id; |
| break; |
| case MXT_TOUCH_PTC_KEYS_T97: |
| data->T97_reportid_min = min_id; |
| data->T97_reportid_max = max_id; |
| break; |
| case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
| data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100; |
| data->T100_reportid_min = min_id; |
| data->T100_reportid_max = max_id; |
| /* first two report IDs reserved */ |
| data->num_touchids = object->num_report_ids - 2; |
| break; |
| } |
| |
| end_address = object->start_address |
| + mxt_obj_size(object) * mxt_obj_instances(object) - 1; |
| |
| if (end_address >= data->mem_size) |
| data->mem_size = end_address + 1; |
| } |
| |
| /* Store maximum reportid */ |
| data->max_reportid = reportid; |
| |
| /* If T44 exists, T5 position has to be directly after */ |
| if (data->T44_address && (data->T5_address != data->T44_address + 1)) { |
| dev_err(&client->dev, "Invalid T44 position\n"); |
| return -EINVAL; |
| } |
| |
| data->msg_buf = kcalloc(data->max_reportid, |
| data->T5_msg_size, GFP_KERNEL); |
| if (!data->msg_buf) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int mxt_read_info_block(struct mxt_data *data) |
| { |
| struct i2c_client *client = data->client; |
| int error; |
| size_t size; |
| void *id_buf, *buf; |
| uint8_t num_objects; |
| u32 calculated_crc; |
| u8 *crc_ptr; |
| |
| /* If info block already allocated, free it */ |
| if (data->raw_info_block) |
| mxt_free_object_table(data); |
| |
| /* Read 7-byte ID information block starting at address 0 */ |
| size = sizeof(struct mxt_info); |
| id_buf = kzalloc(size, GFP_KERNEL); |
| if (!id_buf) |
| return -ENOMEM; |
| |
| error = __mxt_read_reg(client, 0, size, id_buf); |
| if (error) |
| goto err_free_mem; |
| |
| /* Resize buffer to give space for rest of info block */ |
| num_objects = ((struct mxt_info *)id_buf)->object_num; |
| size += (num_objects * sizeof(struct mxt_object)) |
| + MXT_INFO_CHECKSUM_SIZE; |
| |
| buf = krealloc(id_buf, size, GFP_KERNEL); |
| if (!buf) { |
| error = -ENOMEM; |
| goto err_free_mem; |
| } |
| id_buf = buf; |
| |
| /* Read rest of info block */ |
| error = __mxt_read_reg(client, MXT_OBJECT_START, |
| size - MXT_OBJECT_START, |
| id_buf + MXT_OBJECT_START); |
| if (error) |
| goto err_free_mem; |
| |
| /* Extract & calculate checksum */ |
| crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE; |
| data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16); |
| |
| calculated_crc = mxt_calculate_crc(id_buf, 0, |
| size - MXT_INFO_CHECKSUM_SIZE); |
| |
| /* |
| * CRC mismatch can be caused by data corruption due to I2C comms |
| * issue or else device is not using Object Based Protocol (eg i2c-hid) |
| */ |
| if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) { |
| dev_err(&client->dev, |
| "Info Block CRC error calculated=0x%06X read=0x%06X\n", |
| calculated_crc, data->info_crc); |
| error = -EIO; |
| goto err_free_mem; |
| } |
| |
| data->raw_info_block = id_buf; |
| data->info = (struct mxt_info *)id_buf; |
| |
| dev_info(&client->dev, |
| "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n", |
| data->info->family_id, data->info->variant_id, |
| data->info->version >> 4, data->info->version & 0xf, |
| data->info->build, data->info->object_num); |
| |
| /* Parse object table information */ |
| error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START); |
| if (error) { |
| dev_err(&client->dev, "Error %d parsing object table\n", error); |
| mxt_free_object_table(data); |
| return error; |
| } |
| |
| data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START); |
| |
| return 0; |
| |
| err_free_mem: |
| kfree(id_buf); |
| return error; |
| } |
| |
| static int mxt_read_t9_resolution(struct mxt_data *data) |
| { |
| struct i2c_client *client = data->client; |
| int error; |
| struct t9_range range; |
| unsigned char orient; |
| struct mxt_object *object; |
| |
| object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); |
| if (!object) |
| return -EINVAL; |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T9_XSIZE, |
| sizeof(data->xsize), &data->xsize); |
| if (error) |
| return error; |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T9_YSIZE, |
| sizeof(data->ysize), &data->ysize); |
| if (error) |
| return error; |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T9_RANGE, |
| sizeof(range), &range); |
| if (error) |
| return error; |
| |
| data->max_x = get_unaligned_le16(&range.x); |
| data->max_y = get_unaligned_le16(&range.y); |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T9_ORIENT, |
| 1, &orient); |
| if (error) |
| return error; |
| |
| data->xy_switch = orient & MXT_T9_ORIENT_SWITCH; |
| data->invertx = orient & MXT_T9_ORIENT_INVERTX; |
| data->inverty = orient & MXT_T9_ORIENT_INVERTY; |
| |
| return 0; |
| } |
| |
| static int mxt_read_t100_config(struct mxt_data *data) |
| { |
| struct i2c_client *client = data->client; |
| int error; |
| struct mxt_object *object; |
| u16 range_x, range_y; |
| u8 cfg, tchaux; |
| u8 aux; |
| |
| object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100); |
| if (!object) |
| return -EINVAL; |
| |
| /* read touchscreen dimensions */ |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T100_XRANGE, |
| sizeof(range_x), &range_x); |
| if (error) |
| return error; |
| |
| data->max_x = get_unaligned_le16(&range_x); |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T100_YRANGE, |
| sizeof(range_y), &range_y); |
| if (error) |
| return error; |
| |
| data->max_y = get_unaligned_le16(&range_y); |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T100_XSIZE, |
| sizeof(data->xsize), &data->xsize); |
| if (error) |
| return error; |
| |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T100_YSIZE, |
| sizeof(data->ysize), &data->ysize); |
| if (error) |
| return error; |
| |
| /* read orientation config */ |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T100_CFG1, |
| 1, &cfg); |
| if (error) |
| return error; |
| |
| data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY; |
| data->invertx = cfg & MXT_T100_CFG_INVERTX; |
| data->inverty = cfg & MXT_T100_CFG_INVERTY; |
| |
| /* allocate aux bytes */ |
| error = __mxt_read_reg(client, |
| object->start_address + MXT_T100_TCHAUX, |
| 1, &tchaux); |
| if (error) |
| return error; |
| |
| aux = 6; |
| |
| if (tchaux & MXT_T100_TCHAUX_VECT) |
| data->t100_aux_vect = aux++; |
| |
| if (tchaux & MXT_T100_TCHAUX_AMPL) |
| data->t100_aux_ampl = aux++; |
| |
| if (tchaux & MXT_T100_TCHAUX_AREA) |
| data->t100_aux_area = aux++; |
| |
| dev_dbg(&client->dev, |
| "T100 aux mappings vect:%u ampl:%u area:%u\n", |
| data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area); |
| |
| return 0; |
| } |
| |
| static int mxt_input_open(struct input_dev *dev); |
| static void mxt_input_close(struct input_dev *dev); |
| |
| static void mxt_set_up_as_touchpad(struct input_dev *input_dev, |
| struct mxt_data *data) |
| { |
| int i; |
| |
| input_dev->name = "Atmel maXTouch Touchpad"; |
| |
| __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); |
| |
| input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); |
| input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); |
| input_abs_set_res(input_dev, ABS_MT_POSITION_X, |
| MXT_PIXELS_PER_MM); |
| input_abs_set_res(input_dev, ABS_MT_POSITION_Y, |
| MXT_PIXELS_PER_MM); |
| |
| for (i = 0; i < data->t19_num_keys; i++) |
| if (data->t19_keymap[i] != KEY_RESERVED) |
| input_set_capability(input_dev, EV_KEY, |
| data->t19_keymap[i]); |
| } |
| |
| static int mxt_initialize_input_device(struct mxt_data *data) |
| { |
| struct device *dev = &data->client->dev; |
| struct input_dev *input_dev; |
| int error; |
| unsigned int num_mt_slots; |
| unsigned int mt_flags = 0; |
| int i; |
| |
| switch (data->multitouch) { |
| case MXT_TOUCH_MULTI_T9: |
| num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; |
| error = mxt_read_t9_resolution(data); |
| if (error) |
| dev_warn(dev, "Failed to initialize T9 resolution\n"); |
| break; |
| |
| case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
| num_mt_slots = data->num_touchids; |
| error = mxt_read_t100_config(data); |
| if (error) |
| dev_warn(dev, "Failed to read T100 config\n"); |
| break; |
| |
| default: |
| dev_err(dev, "Invalid multitouch object\n"); |
| return -EINVAL; |
| } |
| |
| /* Handle default values and orientation switch */ |
| if (data->max_x == 0) |
| data->max_x = 1023; |
| |
| if (data->max_y == 0) |
| data->max_y = 1023; |
| |
| if (data->xy_switch) |
| swap(data->max_x, data->max_y); |
| |
| dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y); |
| |
| /* Register input device */ |
| input_dev = input_allocate_device(); |
| if (!input_dev) |
| return -ENOMEM; |
| |
| input_dev->name = "Atmel maXTouch Touchscreen"; |
| input_dev->phys = data->phys; |
| input_dev->id.bustype = BUS_I2C; |
| input_dev->dev.parent = dev; |
| input_dev->open = mxt_input_open; |
| input_dev->close = mxt_input_close; |
| |
| input_dev->keycode = data->t15_keymap; |
| input_dev->keycodemax = data->t15_num_keys; |
| input_dev->keycodesize = sizeof(data->t15_keymap[0]); |
| |
| input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
| |
| /* For single touch */ |
| input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0); |
| input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0); |
| |
| if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
| (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
| data->t100_aux_ampl)) { |
| input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); |
| } |
| |
| /* If device has buttons we assume it is a touchpad */ |
| if (data->t19_num_keys) { |
| mxt_set_up_as_touchpad(input_dev, data); |
| mt_flags |= INPUT_MT_POINTER; |
| } else { |
| mt_flags |= INPUT_MT_DIRECT; |
| } |
| |
| /* For multi touch */ |
| error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); |
| if (error) { |
| dev_err(dev, "Error %d initialising slots\n", error); |
| goto err_free_mem; |
| } |
| |
| if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) { |
| input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, |
| 0, MT_TOOL_MAX, 0, 0); |
| input_set_abs_params(input_dev, ABS_MT_DISTANCE, |
| MXT_DISTANCE_ACTIVE_TOUCH, |
| MXT_DISTANCE_HOVERING, |
| 0, 0); |
| } |
| |
| input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
| 0, data->max_x, 0, 0); |
| input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
| 0, data->max_y, 0, 0); |
| |
| if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
| (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
| data->t100_aux_area)) { |
| input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
| 0, MXT_MAX_AREA, 0, 0); |
| } |
| |
| if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
| (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
| data->t100_aux_ampl)) { |
| input_set_abs_params(input_dev, ABS_MT_PRESSURE, |
| 0, 255, 0, 0); |
| } |
| |
| if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
| data->t100_aux_vect) { |
| input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
| 0, 255, 0, 0); |
| } |
| |
| if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
| data->t100_aux_vect) { |
| input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
| 0, 255, 0, 0); |
| } |
| |
| /* For T15 and T97 Key Array */ |
| if (data->T15_reportid_min || data->T97_reportid_min) { |
| for (i = 0; i < data->t15_num_keys; i++) |
| input_set_capability(input_dev, |
| EV_KEY, data->t15_keymap[i]); |
| } |
| |
| input_set_drvdata(input_dev, data); |
| |
| error = input_register_device(input_dev); |
| if (error) { |
| dev_err(dev, "Error %d registering input device\n", error); |
| goto err_free_mem; |
| } |
| |
| data->input_dev = input_dev; |
| |
| return 0; |
| |
| err_free_mem: |
| input_free_device(input_dev); |
| return error; |
| } |
| |
| static int mxt_configure_objects(struct mxt_data *data, |
| const struct firmware *cfg); |
| |
| static void mxt_config_cb(const struct firmware *cfg, void *ctx) |
| { |
| mxt_configure_objects(ctx, cfg); |
| release_firmware(cfg); |
| } |
| |
| static int mxt_initialize(struct mxt_data *data) |
| { |
| struct i2c_client *client = data->client; |
| int recovery_attempts = 0; |
| int error; |
| |
| while (1) { |
| error = mxt_read_info_block(data); |
| if (!error) |
| break; |
| |
| /* Check bootloader state */ |
| error = mxt_probe_bootloader(data, false); |
| if (error) { |
| dev_info(&client->dev, "Trying alternate bootloader address\n"); |
| error = mxt_probe_bootloader(data, true); |
| if (error) { |
| /* Chip is not in appmode or bootloader mode */ |
| return error; |
| } |
| } |
| |
| /* OK, we are in bootloader, see if we can recover */ |
| if (++recovery_attempts > 1) { |
| dev_err(&client->dev, "Could not recover from bootloader mode\n"); |
| /* |
| * We can reflash from this state, so do not |
| * abort initialization. |
| */ |
| data->in_bootloader = true; |
| return 0; |
| } |
| |
| /* Attempt to exit bootloader into app mode */ |
| mxt_send_bootloader_cmd(data, false); |
| msleep(MXT_FW_RESET_TIME); |
| } |
| |
| error = mxt_check_retrigen(data); |
| if (error) |
| return error; |
| |
| error = mxt_acquire_irq(data); |
| if (error) |
| return error; |
| |
| error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, |
| &client->dev, GFP_KERNEL, data, |
| mxt_config_cb); |
| if (error) { |
| dev_err(&client->dev, "Failed to invoke firmware loader: %d\n", |
| error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep) |
| { |
| struct device *dev = &data->client->dev; |
| int error; |
| struct t7_config *new_config; |
| struct t7_config deepsleep = { .active = 0, .idle = 0 }; |
| |
| if (sleep == MXT_POWER_CFG_DEEPSLEEP) |
| new_config = &deepsleep; |
| else |
| new_config = &data->t7_cfg; |
| |
| error = __mxt_write_reg(data->client, data->T7_address, |
| sizeof(data->t7_cfg), new_config); |
| if (error) |
| return error; |
| |
| dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n", |
| new_config->active, new_config->idle); |
| |
| return 0; |
| } |
| |
| static int mxt_init_t7_power_cfg(struct mxt_data *data) |
| { |
| struct device *dev = &data->client->dev; |
| int error; |
| bool retry = false; |
| |
| recheck: |
| error = __mxt_read_reg(data->client, data->T7_address, |
| sizeof(data->t7_cfg), &data->t7_cfg); |
| if (error) |
| return error; |
| |
| if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) { |
| if (!retry) { |
| dev_dbg(dev, "T7 cfg zero, resetting\n"); |
| mxt_soft_reset(data); |
| retry = true; |
| goto recheck; |
| } else { |
| dev_dbg(dev, "T7 cfg zero after reset, overriding\n"); |
| data->t7_cfg.active = 20; |
| data->t7_cfg.idle = 100; |
| return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); |
| } |
| } |
| |
| dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n", |
| data->t7_cfg.active, data->t7_cfg.idle); |
| return 0; |
| } |
| |
| #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
| static const struct v4l2_file_operations mxt_video_fops = { |
| .owner = THIS_MODULE, |
| .open = v4l2_fh_open, |
| .release = vb2_fop_release, |
| .unlocked_ioctl = video_ioctl2, |
| .read = vb2_fop_read, |
| .mmap = vb2_fop_mmap, |
| .poll = vb2_fop_poll, |
| }; |
| |
| static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x, |
| unsigned int y) |
| { |
| struct mxt_info *info = data->info; |
| struct mxt_dbg *dbg = &data->dbg; |
| unsigned int ofs, page; |
| unsigned int col = 0; |
| unsigned int col_width; |
| |
| if (info->family_id == MXT_FAMILY_1386) { |
| col_width = info->matrix_ysize / MXT1386_COLUMNS; |
| col = y / col_width; |
| y = y % col_width; |
| } else { |
| col_width = info->matrix_ysize; |
| } |
| |
| ofs = (y + (x * col_width)) * sizeof(u16); |
| page = ofs / MXT_DIAGNOSTIC_SIZE; |
| ofs %= MXT_DIAGNOSTIC_SIZE; |
| |
| if (info->family_id == MXT_FAMILY_1386) |
| page += col * MXT1386_PAGES_PER_COLUMN; |
| |
| return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]); |
| } |
| |
| static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf) |
| { |
| struct mxt_dbg *dbg = &data->dbg; |
| unsigned int x = 0; |
| unsigned int y = 0; |
| unsigned int i, rx, ry; |
| |
| for (i = 0; i < dbg->t37_nodes; i++) { |
| /* Handle orientation */ |
| rx = data->xy_switch ? y : x; |
| ry = data->xy_switch ? x : y; |
| rx = data->invertx ? (data->xsize - 1 - rx) : rx; |
| ry = data->inverty ? (data->ysize - 1 - ry) : ry; |
| |
| outbuf[i] = mxt_get_debug_value(data, rx, ry); |
| |
| /* Next value */ |
| if (++x >= (data->xy_switch ? data->ysize : data->xsize)) { |
| x = 0; |
| y++; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode, |
| u16 *outbuf) |
| { |
| struct mxt_dbg *dbg = &data->dbg; |
| int retries = 0; |
| int page; |
| int ret; |
| u8 cmd = mode; |
| struct t37_debug *p; |
| u8 cmd_poll; |
| |
| for (page = 0; page < dbg->t37_pages; page++) { |
| p = dbg->t37_buf + page; |
| |
| ret = mxt_write_reg(data->client, dbg->diag_cmd_address, |
| cmd); |
| if (ret) |
| return ret; |
| |
| retries = 0; |
| msleep(20); |
| wait_cmd: |
| /* Read back command byte */ |
| ret = __mxt_read_reg(data->client, dbg->diag_cmd_address, |
| sizeof(cmd_poll), &cmd_poll); |
| if (ret) |
| return ret; |
| |
| /* Field is cleared once the command has been processed */ |
| if (cmd_poll) { |
| if (retries++ > 100) |
| return -EINVAL; |
| |
| msleep(20); |
| goto wait_cmd; |
| } |
| |
| /* Read T37 page */ |
| ret = __mxt_read_reg(data->client, dbg->t37_address, |
| sizeof(struct t37_debug), p); |
| if (ret) |
| return ret; |
| |
| if (p->mode != mode || p->page != page) { |
| dev_err(&data->client->dev, "T37 page mismatch\n"); |
| return -EINVAL; |
| } |
| |
| dev_dbg(&data->client->dev, "%s page:%d retries:%d\n", |
| __func__, page, retries); |
| |
| /* For remaining pages, write PAGEUP rather than mode */ |
| cmd = MXT_DIAGNOSTIC_PAGEUP; |
| } |
| |
| return mxt_convert_debug_pages(data, outbuf); |
| } |
| |
| static int mxt_queue_setup(struct vb2_queue *q, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], struct device *alloc_devs[]) |
| { |
| struct mxt_data *data = q->drv_priv; |
| size_t size = data->dbg.t37_nodes * sizeof(u16); |
| |
| if (*nplanes) |
| return sizes[0] < size ? -EINVAL : 0; |
| |
| *nplanes = 1; |
| sizes[0] = size; |
| |
| return 0; |
| } |
| |
| static void mxt_buffer_queue(struct vb2_buffer *vb) |
| { |
| struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue); |
| u16 *ptr; |
| int ret; |
| u8 mode; |
| |
| ptr = vb2_plane_vaddr(vb, 0); |
| if (!ptr) { |
| dev_err(&data->client->dev, "Error acquiring frame ptr\n"); |
| goto fault; |
| } |
| |
| switch (data->dbg.input) { |
| case MXT_V4L_INPUT_DELTAS: |
| default: |
| mode = MXT_DIAGNOSTIC_DELTAS; |
| break; |
| |
| case MXT_V4L_INPUT_REFS: |
| mode = MXT_DIAGNOSTIC_REFS; |
| break; |
| } |
| |
| ret = mxt_read_diagnostic_debug(data, mode, ptr); |
| if (ret) |
| goto fault; |
| |
| vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16)); |
| vb2_buffer_done(vb, VB2_BUF_STATE_DONE); |
| return; |
| |
| fault: |
| vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
| } |
| |
| /* V4L2 structures */ |
| static const struct vb2_ops mxt_queue_ops = { |
| .queue_setup = mxt_queue_setup, |
| .buf_queue = mxt_buffer_queue, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| }; |
| |
| static const struct vb2_queue mxt_queue = { |
| .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ, |
| .buf_struct_size = sizeof(struct mxt_vb2_buffer), |
| .ops = &mxt_queue_ops, |
| .mem_ops = &vb2_vmalloc_memops, |
| .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, |
| .min_queued_buffers = 1, |
| }; |
| |
| static int mxt_vidioc_querycap(struct file *file, void *priv, |
| struct v4l2_capability *cap) |
| { |
| struct mxt_data *data = video_drvdata(file); |
| |
| strscpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver)); |
| strscpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card)); |
| snprintf(cap->bus_info, sizeof(cap->bus_info), |
| "I2C:%s", dev_name(&data->client->dev)); |
| return 0; |
| } |
| |
| static int mxt_vidioc_enum_input(struct file *file, void *priv, |
| struct v4l2_input *i) |
| { |
| if (i->index >= MXT_V4L_INPUT_MAX) |
| return -EINVAL; |
| |
| i->type = V4L2_INPUT_TYPE_TOUCH; |
| |
| switch (i->index) { |
| case MXT_V4L_INPUT_REFS: |
| strscpy(i->name, "Mutual Capacitance References", |
| sizeof(i->name)); |
| break; |
| case MXT_V4L_INPUT_DELTAS: |
| strscpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name)); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_set_input(struct mxt_data *data, unsigned int i) |
| { |
| struct v4l2_pix_format *f = &data->dbg.format; |
| |
| if (i >= MXT_V4L_INPUT_MAX) |
| return -EINVAL; |
| |
| if (i == MXT_V4L_INPUT_DELTAS) |
| f->pixelformat = V4L2_TCH_FMT_DELTA_TD16; |
| else |
| f->pixelformat = V4L2_TCH_FMT_TU16; |
| |
| f->width = data->xy_switch ? data->ysize : data->xsize; |
| f->height = data->xy_switch ? data->xsize : data->ysize; |
| f->field = V4L2_FIELD_NONE; |
| f->colorspace = V4L2_COLORSPACE_RAW; |
| f->bytesperline = f->width * sizeof(u16); |
| f->sizeimage = f->width * f->height * sizeof(u16); |
| |
| data->dbg.input = i; |
| |
| return 0; |
| } |
| |
| static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i) |
| { |
| return mxt_set_input(video_drvdata(file), i); |
| } |
| |
| static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
| { |
| struct mxt_data *data = video_drvdata(file); |
| |
| *i = data->dbg.input; |
| |
| return 0; |
| } |
| |
| static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f) |
| { |
| struct mxt_data *data = video_drvdata(file); |
| |
| f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| f->fmt.pix = data->dbg.format; |
| |
| return 0; |
| } |
| |
| static int mxt_vidioc_enum_fmt(struct file *file, void *priv, |
| struct v4l2_fmtdesc *fmt) |
| { |
| if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| switch (fmt->index) { |
| case 0: |
| fmt->pixelformat = V4L2_TCH_FMT_TU16; |
| break; |
| |
| case 1: |
| fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int mxt_vidioc_g_parm(struct file *file, void *fh, |
| struct v4l2_streamparm *a) |
| { |
| if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| |
| a->parm.capture.readbuffers = 1; |
| a->parm.capture.timeperframe.numerator = 1; |
| a->parm.capture.timeperframe.denominator = 10; |
| return 0; |
| } |
| |
| static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = { |
| .vidioc_querycap = mxt_vidioc_querycap, |
| |
| .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt, |
| .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt, |
| .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt, |
| .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt, |
| .vidioc_g_parm = mxt_vidioc_g_parm, |
| |
| .vidioc_enum_input = mxt_vidioc_enum_input, |
| .vidioc_g_input = mxt_vidioc_g_input, |
| .vidioc_s_input = mxt_vidioc_s_input, |
| |
| .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| .vidioc_querybuf = vb2_ioctl_querybuf, |
| .vidioc_qbuf = vb2_ioctl_qbuf, |
| .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| .vidioc_expbuf = vb2_ioctl_expbuf, |
| |
| .vidioc_streamon = vb2_ioctl_streamon, |
| .vidioc_streamoff = vb2_ioctl_streamoff, |
| }; |
| |
| static const struct video_device mxt_video_device = { |
| .name = "Atmel maxTouch", |
| .fops = &mxt_video_fops, |
| .ioctl_ops = &mxt_video_ioctl_ops, |
| .release = video_device_release_empty, |
| .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH | |
| V4L2_CAP_READWRITE | V4L2_CAP_STREAMING, |
| }; |
| |
| static void mxt_debug_init(struct mxt_data *data) |
| { |
| struct mxt_info *info = data->info; |
| struct mxt_dbg *dbg = &data->dbg; |
| struct mxt_object *object; |
| int error; |
| |
| object = mxt_get_object(data, MXT_GEN_COMMAND_T6); |
| if (!object) |
| goto error; |
| |
| dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC; |
| |
| object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37); |
| if (!object) |
| goto error; |
| |
| if (mxt_obj_size(object) != sizeof(struct t37_debug)) { |
| dev_warn(&data->client->dev, "Bad T37 size"); |
| goto error; |
| } |
| |
| dbg->t37_address = object->start_address; |
| |
| /* Calculate size of data and allocate buffer */ |
| dbg->t37_nodes = data->xsize * data->ysize; |
| |
| if (info->family_id == MXT_FAMILY_1386) |
| dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN; |
| else |
| dbg->t37_pages = DIV_ROUND_UP(data->xsize * |
| info->matrix_ysize * |
| sizeof(u16), |
| sizeof(dbg->t37_buf->data)); |
| |
| dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages, |
| sizeof(struct t37_debug), GFP_KERNEL); |
| if (!dbg->t37_buf) |
| goto error; |
| |
| /* init channel to zero */ |
| mxt_set_input(data, 0); |
| |
| /* register video device */ |
| snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts"); |
| error = v4l2_device_register(&data->client->dev, &dbg->v4l2); |
| if (error) |
| goto error; |
| |
| /* initialize the queue */ |
| mutex_init(&dbg->lock); |
| dbg->queue = mxt_queue; |
| dbg->queue.drv_priv = data; |
| dbg->queue.lock = &dbg->lock; |
| dbg->queue.dev = &data->client->dev; |
| |
| error = vb2_queue_init(&dbg->queue); |
| if (error) |
| goto error_unreg_v4l2; |
| |
| dbg->vdev = mxt_video_device; |
| dbg->vdev.v4l2_dev = &dbg->v4l2; |
| dbg->vdev.lock = &dbg->lock; |
| dbg->vdev.vfl_dir = VFL_DIR_RX; |
| dbg->vdev.queue = &dbg->queue; |
| video_set_drvdata(&dbg->vdev, data); |
| |
| error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1); |
| if (error) |
| goto error_unreg_v4l2; |
| |
| return; |
| |
| error_unreg_v4l2: |
| v4l2_device_unregister(&dbg->v4l2); |
| error: |
| dev_warn(&data->client->dev, "Error initializing T37\n"); |
| } |
| #else |
| static void mxt_debug_init(struct mxt_data *data) |
| { |
| } |
| #endif |
| |
| static int mxt_configure_objects(struct mxt_data *data, |
| const struct firmware *cfg) |
| { |
| struct device *dev = &data->client->dev; |
| int error; |
| |
| error = mxt_init_t7_power_cfg(data); |
| if (error) { |
| dev_err(dev, "Failed to initialize power cfg\n"); |
| return error; |
| } |
| |
| if (cfg) { |
| error = mxt_update_cfg(data, cfg); |
| if (error) |
| dev_warn(dev, "Error %d updating config\n", error); |
| } |
| |
| if (data->multitouch) { |
| error = mxt_initialize_input_device(data); |
| if (error) |
| return error; |
| } else { |
| dev_warn(dev, "No touch object detected\n"); |
| } |
| |
| mxt_debug_init(data); |
| |
| return 0; |
| } |
| |
| /* Firmware Version is returned as Major.Minor.Build */ |
| static ssize_t mxt_fw_version_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct mxt_data *data = dev_get_drvdata(dev); |
| struct mxt_info *info = data->info; |
| return sysfs_emit(buf, "%u.%u.%02X\n", |
| info->version >> 4, info->version & 0xf, info->build); |
| } |
| |
| /* Hardware Version is returned as FamilyID.VariantID */ |
| static ssize_t mxt_hw_version_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct mxt_data *data = dev_get_drvdata(dev); |
| struct mxt_info *info = data->info; |
| return sysfs_emit(buf, "%u.%u\n", info->family_id, info->variant_id); |
| } |
| |
| static ssize_t mxt_show_instance(char *buf, int count, |
| struct mxt_object *object, int instance, |
| const u8 *val) |
| { |
| int i; |
| |
| if (mxt_obj_instances(object) > 1) |
| count += sysfs_emit_at(buf, count, "Instance %u\n", instance); |
| |
| for (i = 0; i < mxt_obj_size(object); i++) |
| count += sysfs_emit_at(buf, count, "\t[%2u]: %02x (%d)\n", |
| i, val[i], val[i]); |
| count += sysfs_emit_at(buf, count, "\n"); |
| |
| return count; |
| } |
| |
| static ssize_t mxt_object_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct mxt_data *data = dev_get_drvdata(dev); |
| struct mxt_object *object; |
| int count = 0; |
| int i, j; |
| int error; |
| u8 *obuf; |
| |
| /* Pre-allocate buffer large enough to hold max sized object. */ |
| obuf = kmalloc(256, GFP_KERNEL); |
| if (!obuf) |
| return -ENOMEM; |
| |
| error = 0; |
| for (i = 0; i < data->info->object_num; i++) { |
| object = data->object_table + i; |
| |
| if (!mxt_object_readable(object->type)) |
| continue; |
| |
| count += sysfs_emit_at(buf, count, "T%u:\n", object->type); |
| |
| for (j = 0; j < mxt_obj_instances(object); j++) { |
| u16 size = mxt_obj_size(object); |
| u16 addr = object->start_address + j * size; |
| |
| error = __mxt_read_reg(data->client, addr, size, obuf); |
| if (error) |
| goto done; |
| |
| count = mxt_show_instance(buf, count, object, j, obuf); |
| } |
| } |
| |
| done: |
| kfree(obuf); |
| return error ?: count; |
| } |
| |
| static int mxt_check_firmware_format(struct device *dev, |
| const struct firmware *fw) |
| { |
| unsigned int pos = 0; |
| char c; |
| |
| while (pos < fw->size) { |
| c = *(fw->data + pos); |
| |
| if (c < '0' || (c > '9' && c < 'A') || c > 'F') |
| return 0; |
| |
| pos++; |
| } |
| |
| /* |
| * To convert file try: |
| * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw |
| */ |
| dev_err(dev, "Aborting: firmware file must be in binary format\n"); |
| |
| return -EINVAL; |
| } |
| |
| static int mxt_load_fw(struct device *dev, const char *fn) |
| { |
| struct mxt_data *data = dev_get_drvdata(dev); |
| const struct firmware *fw = NULL; |
| unsigned int frame_size; |
| unsigned int pos = 0; |
| unsigned int retry = 0; |
| unsigned int frame = 0; |
| int ret; |
| |
| ret = request_firmware(&fw, fn, dev); |
| if (ret) { |
| dev_err(dev, "Unable to open firmware %s\n", fn); |
| return ret; |
| } |
| |
| /* Check for incorrect enc file */ |
| ret = mxt_check_firmware_format(dev, fw); |
| if (ret) |
| goto release_firmware; |
| |
| if (!data->in_bootloader) { |
| /* Change to the bootloader mode */ |
| data->in_bootloader = true; |
| |
| ret = mxt_t6_command(data, MXT_COMMAND_RESET, |
| MXT_BOOT_VALUE, false); |
| if (ret) |
| goto release_firmware; |
| |
| msleep(MXT_RESET_TIME); |
| |
| /* Do not need to scan since we know family ID */ |
| ret = mxt_lookup_bootloader_address(data, 0); |
| if (ret) |
| goto release_firmware; |
| |
| mxt_free_input_device(data); |
| mxt_free_object_table(data); |
| } else { |
| enable_irq(data->irq); |
| } |
| |
| reinit_completion(&data->bl_completion); |
| |
| ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false); |
| if (ret) { |
| /* Bootloader may still be unlocked from previous attempt */ |
| ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false); |
| if (ret) |
| goto disable_irq; |
| } else { |
| dev_info(dev, "Unlocking bootloader\n"); |
| |
| /* Unlock bootloader */ |
| ret = mxt_send_bootloader_cmd(data, true); |
| if (ret) |
| goto disable_irq; |
| } |
| |
| while (pos < fw->size) { |
| ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true); |
| if (ret) |
| goto disable_irq; |
| |
| frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); |
| |
| /* Take account of CRC bytes */ |
| frame_size += 2; |
| |
| /* Write one frame to device */ |
| ret = mxt_bootloader_write(data, fw->data + pos, frame_size); |
| if (ret) |
| goto disable_irq; |
| |
| ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true); |
| if (ret) { |
| retry++; |
| |
| /* Back off by 20ms per retry */ |
| msleep(retry * 20); |
| |
| if (retry > 20) { |
| dev_err(dev, "Retry count exceeded\n"); |
| goto disable_irq; |
| } |
| } else { |
| retry = 0; |
| pos += frame_size; |
| frame++; |
| } |
| |
| if (frame % 50 == 0) |
| dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n", |
| frame, pos, fw->size); |
| } |
| |
| /* Wait for flash. */ |
| ret = mxt_wait_for_completion(data, &data->bl_completion, |
| MXT_FW_RESET_TIME); |
| if (ret) |
| goto disable_irq; |
| |
| dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos); |
| |
| /* |
| * Wait for device to reset. Some bootloader versions do not assert |
| * the CHG line after bootloading has finished, so ignore potential |
| * errors. |
| */ |
| mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME); |
| |
| data->in_bootloader = false; |
| |
| disable_irq: |
| disable_irq(data->irq); |
| release_firmware: |
| release_firmware(fw); |
| return ret; |
| } |
| |
| static ssize_t mxt_update_fw_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct mxt_data *data = dev_get_drvdata(dev); |
| int error; |
| |
| error = mxt_load_fw(dev, MXT_FW_NAME); |
| if (error) { |
| dev_err(dev, "The firmware update failed(%d)\n", error); |
| count = error; |
| } else { |
| dev_info(dev, "The firmware update succeeded\n"); |
| |
| error = mxt_initialize(data); |
| if (error) |
| return error; |
| } |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); |
| static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); |
| static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); |
| static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); |
| |
| static struct attribute *mxt_attrs[] = { |
| &dev_attr_fw_version.attr, |
| &dev_attr_hw_version.attr, |
| &dev_attr_object.attr, |
| &dev_attr_update_fw.attr, |
| NULL |
| }; |
| |
| static const struct attribute_group mxt_attr_group = { |
| .attrs = mxt_attrs, |
| }; |
| |
| static void mxt_start(struct mxt_data *data) |
| { |
| mxt_wakeup_toggle(data->client, true, false); |
| |
| switch (data->suspend_mode) { |
| case MXT_SUSPEND_T9_CTRL: |
| mxt_soft_reset(data); |
| |
| /* Touch enable */ |
| /* 0x83 = SCANEN | RPTEN | ENABLE */ |
| mxt_write_object(data, |
| MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83); |
| break; |
| |
| case MXT_SUSPEND_DEEP_SLEEP: |
| default: |
| mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); |
| |
| /* Recalibrate since chip has been in deep sleep */ |
| mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false); |
| break; |
| } |
| } |
| |
| static void mxt_stop(struct mxt_data *data) |
| { |
| switch (data->suspend_mode) { |
| case MXT_SUSPEND_T9_CTRL: |
| /* Touch disable */ |
| mxt_write_object(data, |
| MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0); |
| break; |
| |
| case MXT_SUSPEND_DEEP_SLEEP: |
| default: |
| mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP); |
| break; |
| } |
| |
| mxt_wakeup_toggle(data->client, false, false); |
| } |
| |
| static int mxt_input_open(struct input_dev *dev) |
| { |
| struct mxt_data *data = input_get_drvdata(dev); |
| |
| mxt_start(data); |
| |
| return 0; |
| } |
| |
| static void mxt_input_close(struct input_dev *dev) |
| { |
| struct mxt_data *data = input_get_drvdata(dev); |
| |
| mxt_stop(data); |
| } |
| |
| static int mxt_parse_device_properties(struct mxt_data *data) |
| { |
| static const char keymap_property[] = "linux,gpio-keymap"; |
| static const char buttons_property[] = "linux,keycodes"; |
| struct device *dev = &data->client->dev; |
| u32 *keymap; |
| u32 *buttonmap; |
| int n_keys; |
| int error; |
| |
| if (device_property_present(dev, keymap_property)) { |
| n_keys = device_property_count_u32(dev, keymap_property); |
| if (n_keys <= 0) { |
| error = n_keys < 0 ? n_keys : -EINVAL; |
| dev_err(dev, "invalid/malformed '%s' property: %d\n", |
| keymap_property, error); |
| return error; |
| } |
| |
| keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap), |
| GFP_KERNEL); |
| if (!keymap) |
| return -ENOMEM; |
| |
| error = device_property_read_u32_array(dev, keymap_property, |
| keymap, n_keys); |
| if (error) { |
| dev_err(dev, "failed to parse '%s' property: %d\n", |
| keymap_property, error); |
| return error; |
| } |
| |
| data->t19_keymap = keymap; |
| data->t19_num_keys = n_keys; |
| } |
| |
| if (device_property_present(dev, buttons_property)) { |
| n_keys = device_property_count_u32(dev, buttons_property); |
| if (n_keys <= 0) { |
| error = n_keys < 0 ? n_keys : -EINVAL; |
| dev_err(dev, "invalid/malformed '%s' property: %d\n", |
| buttons_property, error); |
| return error; |
| } |
| |
| buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap), |
| GFP_KERNEL); |
| if (!buttonmap) |
| return -ENOMEM; |
| |
| error = device_property_read_u32_array(dev, buttons_property, |
| buttonmap, n_keys); |
| if (error) { |
| dev_err(dev, "failed to parse '%s' property: %d\n", |
| buttons_property, error); |
| return error; |
| } |
| |
| data->t15_keymap = buttonmap; |
| data->t15_num_keys = n_keys; |
| } |
| |
| return 0; |
| } |
| |
| static const struct dmi_system_id chromebook_T9_suspend_dmi[] = { |
| { |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Link"), |
| }, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"), |
| }, |
| }, |
| { } |
| }; |
| |
| static int mxt_probe(struct i2c_client *client) |
| { |
| struct mxt_data *data; |
| int error; |
| |
| /* |
| * Ignore devices that do not have device properties attached to |
| * them, as we need help determining whether we are dealing with |
| * touch screen or touchpad. |
| * |
| * So far on x86 the only users of Atmel touch controllers are |
| * Chromebooks, and chromeos_laptop driver will ensure that |
| * necessary properties are provided (if firmware does not do that). |
| */ |
| if (!device_property_present(&client->dev, "compatible")) |
| return -ENXIO; |
| |
| /* |
| * Ignore ACPI devices representing bootloader mode. |
| * |
| * This is a bit of a hack: Google Chromebook BIOS creates ACPI |
| * devices for both application and bootloader modes, but we are |
| * interested in application mode only (if device is in bootloader |
| * mode we'll end up switching into application anyway). So far |
| * application mode addresses were all above 0x40, so we'll use it |
| * as a threshold. |
| */ |
| if (ACPI_COMPANION(&client->dev) && client->addr < 0x40) |
| return -ENXIO; |
| |
| data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", |
| client->adapter->nr, client->addr); |
| |
| data->client = client; |
| data->irq = client->irq; |
| i2c_set_clientdata(client, data); |
| |
| init_completion(&data->bl_completion); |
| init_completion(&data->reset_completion); |
| init_completion(&data->crc_completion); |
| |
| data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ? |
| MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP; |
| |
| error = mxt_parse_device_properties(data); |
| if (error) |
| return error; |
| |
| /* |
| * VDDA is the analog voltage supply 2.57..3.47 V |
| * VDD is the digital voltage supply 1.71..3.47 V |
| */ |
| data->regulators[0].supply = "vdda"; |
| data->regulators[1].supply = "vdd"; |
| error = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(data->regulators), |
| data->regulators); |
| if (error) { |
| if (error != -EPROBE_DEFER) |
| dev_err(&client->dev, "Failed to get regulators %d\n", |
| error); |
| return error; |
| } |
| |
| /* Request the RESET line as asserted so we go into reset */ |
| data->reset_gpio = devm_gpiod_get_optional(&client->dev, |
| "reset", GPIOD_OUT_HIGH); |
| if (IS_ERR(data->reset_gpio)) { |
| error = PTR_ERR(data->reset_gpio); |
| dev_err(&client->dev, "Failed to get reset gpio: %d\n", error); |
| return error; |
| } |
| |
| /* Request the WAKE line as asserted so we go out of sleep */ |
| data->wake_gpio = devm_gpiod_get_optional(&client->dev, |
| "wake", GPIOD_OUT_HIGH); |
| if (IS_ERR(data->wake_gpio)) { |
| error = PTR_ERR(data->wake_gpio); |
| dev_err(&client->dev, "Failed to get wake gpio: %d\n", error); |
| return error; |
| } |
| |
| error = devm_request_threaded_irq(&client->dev, client->irq, |
| NULL, mxt_interrupt, |
| IRQF_ONESHOT | IRQF_NO_AUTOEN, |
| client->name, data); |
| if (error) { |
| dev_err(&client->dev, "Failed to register interrupt\n"); |
| return error; |
| } |
| |
| error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), |
| data->regulators); |
| if (error) { |
| dev_err(&client->dev, "failed to enable regulators: %d\n", |
| error); |
| return error; |
| } |
| /* |
| * The device takes 40ms to come up after power-on according |
| * to the mXT224 datasheet, page 13. |
| */ |
| msleep(MXT_BACKUP_TIME); |
| |
| if (data->reset_gpio) { |
| /* Wait a while and then de-assert the RESET GPIO line */ |
| msleep(MXT_RESET_GPIO_TIME); |
| gpiod_set_value(data->reset_gpio, 0); |
| msleep(MXT_RESET_INVALID_CHG); |
| } |
| |
| /* |
| * Controllers like mXT1386 have a dedicated WAKE line that could be |
| * connected to a GPIO or to I2C SCL pin, or permanently asserted low. |
| * |
| * This WAKE line is used for waking controller from a deep-sleep and |
| * it needs to be asserted low for 25 milliseconds before I2C transfers |
| * could be accepted by controller if it was in a deep-sleep mode. |
| * Controller will go into sleep automatically after 2 seconds of |
| * inactivity if WAKE line is deasserted and deep sleep is activated. |
| * |
| * If WAKE line is connected to I2C SCL pin, then the first I2C transfer |
| * will get an instant NAK and transfer needs to be retried after 25ms. |
| * |
| * If WAKE line is connected to a GPIO line, the line must be asserted |
| * 25ms before the host attempts to communicate with the controller. |
| */ |
| device_property_read_u32(&client->dev, "atmel,wakeup-method", |
| &data->wakeup_method); |
| |
| error = mxt_initialize(data); |
| if (error) |
| goto err_disable_regulators; |
| |
| error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); |
| if (error) { |
| dev_err(&client->dev, "Failure %d creating sysfs group\n", |
| error); |
| goto err_free_object; |
| } |
| |
| return 0; |
| |
| err_free_object: |
| mxt_free_input_device(data); |
| mxt_free_object_table(data); |
| err_disable_regulators: |
| regulator_bulk_disable(ARRAY_SIZE(data->regulators), |
| data->regulators); |
| return error; |
| } |
| |
| static void mxt_remove(struct i2c_client *client) |
| { |
| struct mxt_data *data = i2c_get_clientdata(client); |
| |
| disable_irq(data->irq); |
| sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); |
| mxt_free_input_device(data); |
| mxt_free_object_table(data); |
| regulator_bulk_disable(ARRAY_SIZE(data->regulators), |
| data->regulators); |
| } |
| |
| static int mxt_suspend(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mxt_data *data = i2c_get_clientdata(client); |
| struct input_dev *input_dev = data->input_dev; |
| |
| if (!input_dev) |
| return 0; |
| |
| mutex_lock(&input_dev->mutex); |
| |
| if (input_device_enabled(input_dev)) |
| mxt_stop(data); |
| |
| mutex_unlock(&input_dev->mutex); |
| |
| disable_irq(data->irq); |
| |
| return 0; |
| } |
| |
| static int mxt_resume(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct mxt_data *data = i2c_get_clientdata(client); |
| struct input_dev *input_dev = data->input_dev; |
| |
| if (!input_dev) |
| return 0; |
| |
| enable_irq(data->irq); |
| |
| mutex_lock(&input_dev->mutex); |
| |
| if (input_device_enabled(input_dev)) |
| mxt_start(data); |
| |
| mutex_unlock(&input_dev->mutex); |
| |
| return 0; |
| } |
| |
| static DEFINE_SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); |
| |
| static const struct of_device_id mxt_of_match[] = { |
| { .compatible = "atmel,maxtouch", }, |
| /* Compatibles listed below are deprecated */ |
| { .compatible = "atmel,qt602240_ts", }, |
| { .compatible = "atmel,atmel_mxt_ts", }, |
| { .compatible = "atmel,atmel_mxt_tp", }, |
| { .compatible = "atmel,mXT224", }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, mxt_of_match); |
| |
| #ifdef CONFIG_ACPI |
| static const struct acpi_device_id mxt_acpi_id[] = { |
| { "ATML0000", 0 }, /* Touchpad */ |
| { "ATML0001", 0 }, /* Touchscreen */ |
| { } |
| }; |
| MODULE_DEVICE_TABLE(acpi, mxt_acpi_id); |
| #endif |
| |
| static const struct i2c_device_id mxt_id[] = { |
| { "qt602240_ts", 0 }, |
| { "atmel_mxt_ts", 0 }, |
| { "atmel_mxt_tp", 0 }, |
| { "maxtouch", 0 }, |
| { "mXT224", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, mxt_id); |
| |
| static struct i2c_driver mxt_driver = { |
| .driver = { |
| .name = "atmel_mxt_ts", |
| .of_match_table = mxt_of_match, |
| .acpi_match_table = ACPI_PTR(mxt_acpi_id), |
| .pm = pm_sleep_ptr(&mxt_pm_ops), |
| }, |
| .probe = mxt_probe, |
| .remove = mxt_remove, |
| .id_table = mxt_id, |
| }; |
| |
| module_i2c_driver(mxt_driver); |
| |
| /* Module information */ |
| MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); |
| MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); |
| MODULE_LICENSE("GPL"); |