| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kyle Manna | 1265 | 84.96% | 1 | 7.14% |
| Dmitry Torokhov | 109 | 7.32% | 6 | 42.86% |
| Alban Bedel | 70 | 4.70% | 2 | 14.29% |
| Damien Riegel | 20 | 1.34% | 1 | 7.14% |
| Arnd Bergmann | 16 | 1.07% | 1 | 7.14% |
| Simon Glass | 7 | 0.47% | 1 | 7.14% |
| Uwe Kleine-König | 1 | 0.07% | 1 | 7.14% |
| Lars-Peter Clausen | 1 | 0.07% | 1 | 7.14% |
| Total | 1489 | 14 |
/* * Driver for TCA8418 I2C keyboard * * Copyright (C) 2011 Fuel7, Inc. All rights reserved. * * Author: Kyle Manna <kyle.manna@fuel7.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. * * If you can't comply with GPLv2, alternative licensing terms may be * arranged. Please contact Fuel7, Inc. (http://fuel7.com/) for proprietary * alternative licensing inquiries. */ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/input.h> #include <linux/input/matrix_keypad.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> #include <linux/property.h> #include <linux/slab.h> #include <linux/types.h> /* TCA8418 hardware limits */ #define TCA8418_MAX_ROWS 8 #define TCA8418_MAX_COLS 10 /* TCA8418 register offsets */ #define REG_CFG 0x01 #define REG_INT_STAT 0x02 #define REG_KEY_LCK_EC 0x03 #define REG_KEY_EVENT_A 0x04 #define REG_KEY_EVENT_B 0x05 #define REG_KEY_EVENT_C 0x06 #define REG_KEY_EVENT_D 0x07 #define REG_KEY_EVENT_E 0x08 #define REG_KEY_EVENT_F 0x09 #define REG_KEY_EVENT_G 0x0A #define REG_KEY_EVENT_H 0x0B #define REG_KEY_EVENT_I 0x0C #define REG_KEY_EVENT_J 0x0D #define REG_KP_LCK_TIMER 0x0E #define REG_UNLOCK1 0x0F #define REG_UNLOCK2 0x10 #define REG_GPIO_INT_STAT1 0x11 #define REG_GPIO_INT_STAT2 0x12 #define REG_GPIO_INT_STAT3 0x13 #define REG_GPIO_DAT_STAT1 0x14 #define REG_GPIO_DAT_STAT2 0x15 #define REG_GPIO_DAT_STAT3 0x16 #define REG_GPIO_DAT_OUT1 0x17 #define REG_GPIO_DAT_OUT2 0x18 #define REG_GPIO_DAT_OUT3 0x19 #define REG_GPIO_INT_EN1 0x1A #define REG_GPIO_INT_EN2 0x1B #define REG_GPIO_INT_EN3 0x1C #define REG_KP_GPIO1 0x1D #define REG_KP_GPIO2 0x1E #define REG_KP_GPIO3 0x1F #define REG_GPI_EM1 0x20 #define REG_GPI_EM2 0x21 #define REG_GPI_EM3 0x22 #define REG_GPIO_DIR1 0x23 #define REG_GPIO_DIR2 0x24 #define REG_GPIO_DIR3 0x25 #define REG_GPIO_INT_LVL1 0x26 #define REG_GPIO_INT_LVL2 0x27 #define REG_GPIO_INT_LVL3 0x28 #define REG_DEBOUNCE_DIS1 0x29 #define REG_DEBOUNCE_DIS2 0x2A #define REG_DEBOUNCE_DIS3 0x2B #define REG_GPIO_PULL1 0x2C #define REG_GPIO_PULL2 0x2D #define REG_GPIO_PULL3 0x2E /* TCA8418 bit definitions */ #define CFG_AI BIT(7) #define CFG_GPI_E_CFG BIT(6) #define CFG_OVR_FLOW_M BIT(5) #define CFG_INT_CFG BIT(4) #define CFG_OVR_FLOW_IEN BIT(3) #define CFG_K_LCK_IEN BIT(2) #define CFG_GPI_IEN BIT(1) #define CFG_KE_IEN BIT(0) #define INT_STAT_CAD_INT BIT(4) #define INT_STAT_OVR_FLOW_INT BIT(3) #define INT_STAT_K_LCK_INT BIT(2) #define INT_STAT_GPI_INT BIT(1) #define INT_STAT_K_INT BIT(0) /* TCA8418 register masks */ #define KEY_LCK_EC_KEC 0x7 #define KEY_EVENT_CODE 0x7f #define KEY_EVENT_VALUE 0x80 struct tca8418_keypad { struct i2c_client *client; struct input_dev *input; unsigned int row_shift; }; /* * Write a byte to the TCA8418 */ static int tca8418_write_byte(struct tca8418_keypad *keypad_data, int reg, u8 val) { int error; error = i2c_smbus_write_byte_data(keypad_data->client, reg, val); if (error < 0) { dev_err(&keypad_data->client->dev, "%s failed, reg: %d, val: %d, error: %d\n", __func__, reg, val, error); return error; } return 0; } /* * Read a byte from the TCA8418 */ static int tca8418_read_byte(struct tca8418_keypad *keypad_data, int reg, u8 *val) { int error; error = i2c_smbus_read_byte_data(keypad_data->client, reg); if (error < 0) { dev_err(&keypad_data->client->dev, "%s failed, reg: %d, error: %d\n", __func__, reg, error); return error; } *val = (u8)error; return 0; } static void tca8418_read_keypad(struct tca8418_keypad *keypad_data) { struct input_dev *input = keypad_data->input; unsigned short *keymap = input->keycode; int error, col, row; u8 reg, state, code; do { error = tca8418_read_byte(keypad_data, REG_KEY_EVENT_A, ®); if (error < 0) { dev_err(&keypad_data->client->dev, "unable to read REG_KEY_EVENT_A\n"); break; } /* Assume that key code 0 signifies empty FIFO */ if (reg <= 0) break; state = reg & KEY_EVENT_VALUE; code = reg & KEY_EVENT_CODE; row = code / TCA8418_MAX_COLS; col = code % TCA8418_MAX_COLS; row = (col) ? row : row - 1; col = (col) ? col - 1 : TCA8418_MAX_COLS - 1; code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift); input_event(input, EV_MSC, MSC_SCAN, code); input_report_key(input, keymap[code], state); } while (1); input_sync(input); } /* * Threaded IRQ handler and this can (and will) sleep. */ static irqreturn_t tca8418_irq_handler(int irq, void *dev_id) { struct tca8418_keypad *keypad_data = dev_id; u8 reg; int error; error = tca8418_read_byte(keypad_data, REG_INT_STAT, ®); if (error) { dev_err(&keypad_data->client->dev, "unable to read REG_INT_STAT\n"); return IRQ_NONE; } if (!reg) return IRQ_NONE; if (reg & INT_STAT_OVR_FLOW_INT) dev_warn(&keypad_data->client->dev, "overflow occurred\n"); if (reg & INT_STAT_K_INT) tca8418_read_keypad(keypad_data); /* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */ reg = 0xff; error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg); if (error) dev_err(&keypad_data->client->dev, "unable to clear REG_INT_STAT\n"); return IRQ_HANDLED; } /* * Configure the TCA8418 for keypad operation */ static int tca8418_configure(struct tca8418_keypad *keypad_data, u32 rows, u32 cols) { int reg, error = 0; /* Assemble a mask for row and column registers */ reg = ~(~0 << rows); reg += (~(~0 << cols)) << 8; /* Set registers to keypad mode */ error |= tca8418_write_byte(keypad_data, REG_KP_GPIO1, reg); error |= tca8418_write_byte(keypad_data, REG_KP_GPIO2, reg >> 8); error |= tca8418_write_byte(keypad_data, REG_KP_GPIO3, reg >> 16); /* Enable column debouncing */ error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS1, reg); error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS2, reg >> 8); error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS3, reg >> 16); if (error) return error; error = tca8418_write_byte(keypad_data, REG_CFG, CFG_INT_CFG | CFG_OVR_FLOW_IEN | CFG_KE_IEN); return error; } static int tca8418_keypad_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct tca8418_keypad *keypad_data; struct input_dev *input; u32 rows = 0, cols = 0; int error, row_shift; u8 reg; /* Check i2c driver capabilities */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) { dev_err(dev, "%s adapter not supported\n", dev_driver_string(&client->adapter->dev)); return -ENODEV; } error = matrix_keypad_parse_properties(dev, &rows, &cols); if (error) return error; if (!rows || rows > TCA8418_MAX_ROWS) { dev_err(dev, "invalid rows\n"); return -EINVAL; } if (!cols || cols > TCA8418_MAX_COLS) { dev_err(dev, "invalid columns\n"); return -EINVAL; } row_shift = get_count_order(cols); /* Allocate memory for keypad_data and input device */ keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL); if (!keypad_data) return -ENOMEM; keypad_data->client = client; keypad_data->row_shift = row_shift; /* Read key lock register, if this fails assume device not present */ error = tca8418_read_byte(keypad_data, REG_KEY_LCK_EC, ®); if (error) return -ENODEV; /* Configure input device */ input = devm_input_allocate_device(dev); if (!input) return -ENOMEM; keypad_data->input = input; input->name = client->name; input->id.bustype = BUS_I2C; input->id.vendor = 0x0001; input->id.product = 0x001; input->id.version = 0x0001; error = matrix_keypad_build_keymap(NULL, NULL, rows, cols, NULL, input); if (error) { dev_err(dev, "Failed to build keymap\n"); return error; } if (device_property_read_bool(dev, "keypad,autorepeat")) __set_bit(EV_REP, input->evbit); input_set_capability(input, EV_MSC, MSC_SCAN); error = devm_request_threaded_irq(dev, client->irq, NULL, tca8418_irq_handler, IRQF_SHARED | IRQF_ONESHOT, client->name, keypad_data); if (error) { dev_err(dev, "Unable to claim irq %d; error %d\n", client->irq, error); return error; } /* Initialize the chip */ error = tca8418_configure(keypad_data, rows, cols); if (error < 0) return error; error = input_register_device(input); if (error) { dev_err(dev, "Unable to register input device, error: %d\n", error); return error; } return 0; } static const struct i2c_device_id tca8418_id[] = { { "tca8418", 8418, }, { } }; MODULE_DEVICE_TABLE(i2c, tca8418_id); static const struct of_device_id tca8418_dt_ids[] = { { .compatible = "ti,tca8418", }, { } }; MODULE_DEVICE_TABLE(of, tca8418_dt_ids); static struct i2c_driver tca8418_keypad_driver = { .driver = { .name = "tca8418_keypad", .of_match_table = tca8418_dt_ids, }, .probe = tca8418_keypad_probe, .id_table = tca8418_id, }; static int __init tca8418_keypad_init(void) { return i2c_add_driver(&tca8418_keypad_driver); } subsys_initcall(tca8418_keypad_init); static void __exit tca8418_keypad_exit(void) { i2c_del_driver(&tca8418_keypad_driver); } module_exit(tca8418_keypad_exit); MODULE_AUTHOR("Kyle Manna <kyle.manna@fuel7.com>"); MODULE_DESCRIPTION("Keypad driver for TCA8418"); MODULE_LICENSE("GPL");
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