| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Nick Dyer | 9581 | 66.24% | 50 | 38.76% |
| Joonyoung Shim | 1593 | 11.01% | 4 | 3.10% |
| Dmitry Torokhov | 966 | 6.68% | 11 | 8.53% |
| Daniel Kurtz | 590 | 4.08% | 18 | 13.95% |
| Iiro Valkonen | 456 | 3.15% | 6 | 4.65% |
| Dmitry Osipenko | 261 | 1.80% | 1 | 0.78% |
| Benson Leung | 190 | 1.31% | 3 | 2.33% |
| Linus Walleij | 164 | 1.13% | 3 | 2.33% |
| Sjoerd Simons | 139 | 0.96% | 1 | 0.78% |
| Stephen Warren | 136 | 0.94% | 2 | 1.55% |
| Sebastian Reichel | 117 | 0.81% | 3 | 2.33% |
| Linus Torvalds | 86 | 0.59% | 2 | 1.55% |
| Nathan Huckleberry | 43 | 0.30% | 1 | 0.78% |
| Javier Martinez Canillas | 35 | 0.24% | 2 | 1.55% |
| Yufeng Shen | 21 | 0.15% | 1 | 0.78% |
| Pan Xinhui | 16 | 0.11% | 1 | 0.78% |
| Evan Green | 14 | 0.10% | 1 | 0.78% |
| Andrzej Pietrasiewicz | 6 | 0.04% | 1 | 0.78% |
| Christopher Leech | 6 | 0.04% | 1 | 0.78% |
| Ian Ray | 6 | 0.04% | 1 | 0.78% |
| Zheng Yongjun | 5 | 0.03% | 1 | 0.78% |
| Wolfram Sang | 4 | 0.03% | 1 | 0.78% |
| Jingoo Han | 4 | 0.03% | 2 | 1.55% |
| Sanjeev Chugh | 4 | 0.03% | 1 | 0.78% |
| Gustavo A. R. Silva | 3 | 0.02% | 1 | 0.78% |
| Maxime Roussin-Belanger | 3 | 0.02% | 1 | 0.78% |
| Jiada Wang | 3 | 0.02% | 1 | 0.78% |
| José Expósito | 3 | 0.02% | 1 | 0.78% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.78% |
| Axel Lin | 2 | 0.01% | 1 | 0.78% |
| Barry Song | 2 | 0.01% | 1 | 0.78% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 0.78% |
| Henrik Rydberg | 1 | 0.01% | 1 | 0.78% |
| Andy Shevchenko | 1 | 0.01% | 1 | 0.78% |
| Guenter Roeck | 1 | 0.01% | 1 | 0.78% |
| Total | 14465 | 129 |
// 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_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; u16 T18_address; u8 T19_reportid; u16 T44_address; 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; 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_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_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->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->T18_address = 0; data->T19_reportid = 0; data->T44_address = 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_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_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; 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_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); } 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_buffers_needed = 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 scnprintf(buf, PAGE_SIZE, "%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 scnprintf(buf, PAGE_SIZE, "%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 += scnprintf(buf + count, PAGE_SIZE - count, "Instance %u\n", instance); for (i = 0; i < mxt_obj_size(object); i++) count += scnprintf(buf + count, PAGE_SIZE - count, "\t[%2u]: %02x (%d)\n", i, val[i], val[i]); count += scnprintf(buf + count, PAGE_SIZE - 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 += scnprintf(buf + count, PAGE_SIZE - 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"; struct device *dev = &data->client->dev; u32 *keymap; 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; } 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, const struct i2c_device_id *id) { 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 __maybe_unused 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 __maybe_unused 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 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 = &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");
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