| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Rabin Vincent | 1331 | 78.39% | 2 | 14.29% |
| Linus Walleij | 175 | 10.31% | 3 | 21.43% |
| Dmitry Torokhov | 114 | 6.71% | 4 | 28.57% |
| Viresh Kumar | 52 | 3.06% | 1 | 7.14% |
| Gustavo A. R. Silva | 21 | 1.24% | 1 | 7.14% |
| Uwe Kleine-König | 2 | 0.12% | 1 | 7.14% |
| Thomas Gleixner | 2 | 0.12% | 1 | 7.14% |
| JJ Ding | 1 | 0.06% | 1 | 7.14% |
| Total | 1698 | 14 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) ST-Ericsson SA 2010 * * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson */ #include <linux/module.h> #include <linux/slab.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/input/matrix_keypad.h> #include <linux/mfd/stmpe.h> /* These are at the same addresses in all STMPE variants */ #define STMPE_KPC_COL 0x60 #define STMPE_KPC_ROW_MSB 0x61 #define STMPE_KPC_ROW_LSB 0x62 #define STMPE_KPC_CTRL_MSB 0x63 #define STMPE_KPC_CTRL_LSB 0x64 #define STMPE_KPC_COMBI_KEY_0 0x65 #define STMPE_KPC_COMBI_KEY_1 0x66 #define STMPE_KPC_COMBI_KEY_2 0x67 #define STMPE_KPC_DATA_BYTE0 0x68 #define STMPE_KPC_DATA_BYTE1 0x69 #define STMPE_KPC_DATA_BYTE2 0x6a #define STMPE_KPC_DATA_BYTE3 0x6b #define STMPE_KPC_DATA_BYTE4 0x6c #define STMPE_KPC_CTRL_LSB_SCAN (0x1 << 0) #define STMPE_KPC_CTRL_LSB_DEBOUNCE (0x7f << 1) #define STMPE_KPC_CTRL_MSB_SCAN_COUNT (0xf << 4) #define STMPE_KPC_ROW_MSB_ROWS 0xff #define STMPE_KPC_DATA_UP (0x1 << 7) #define STMPE_KPC_DATA_ROW (0xf << 3) #define STMPE_KPC_DATA_COL (0x7 << 0) #define STMPE_KPC_DATA_NOKEY_MASK 0x78 #define STMPE_KEYPAD_MAX_DEBOUNCE 127 #define STMPE_KEYPAD_MAX_SCAN_COUNT 15 #define STMPE_KEYPAD_MAX_ROWS 8 #define STMPE_KEYPAD_MAX_COLS 8 #define STMPE_KEYPAD_ROW_SHIFT 3 #define STMPE_KEYPAD_KEYMAP_MAX_SIZE \ (STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS) #define STMPE1601_NUM_DATA 5 #define STMPE2401_NUM_DATA 3 #define STMPE2403_NUM_DATA 5 /* Make sure it covers all cases above */ #define MAX_NUM_DATA 5 /** * struct stmpe_keypad_variant - model-specific attributes * @auto_increment: whether the KPC_DATA_BYTE register address * auto-increments on multiple read * @set_pullup: whether the pins need to have their pull-ups set * @num_data: number of data bytes * @num_normal_data: number of normal keys' data bytes * @max_cols: maximum number of columns supported * @max_rows: maximum number of rows supported * @col_gpios: bitmask of gpios which can be used for columns * @row_gpios: bitmask of gpios which can be used for rows */ struct stmpe_keypad_variant { bool auto_increment; bool set_pullup; int num_data; int num_normal_data; int max_cols; int max_rows; unsigned int col_gpios; unsigned int row_gpios; }; static const struct stmpe_keypad_variant stmpe_keypad_variants[] = { [STMPE1601] = { .auto_increment = true, .num_data = STMPE1601_NUM_DATA, .num_normal_data = 3, .max_cols = 8, .max_rows = 8, .col_gpios = 0x000ff, /* GPIO 0 - 7 */ .row_gpios = 0x0ff00, /* GPIO 8 - 15 */ }, [STMPE2401] = { .auto_increment = false, .set_pullup = true, .num_data = STMPE2401_NUM_DATA, .num_normal_data = 2, .max_cols = 8, .max_rows = 12, .col_gpios = 0x0000ff, /* GPIO 0 - 7*/ .row_gpios = 0x1f7f00, /* GPIO 8-14, 16-20 */ }, [STMPE2403] = { .auto_increment = true, .set_pullup = true, .num_data = STMPE2403_NUM_DATA, .num_normal_data = 3, .max_cols = 8, .max_rows = 12, .col_gpios = 0x0000ff, /* GPIO 0 - 7*/ .row_gpios = 0x1fef00, /* GPIO 8-14, 16-20 */ }, }; /** * struct stmpe_keypad - STMPE keypad state container * @stmpe: pointer to parent STMPE device * @input: spawned input device * @variant: STMPE variant * @debounce_ms: debounce interval, in ms. Maximum is * %STMPE_KEYPAD_MAX_DEBOUNCE. * @scan_count: number of key scanning cycles to confirm key data. * Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT. * @no_autorepeat: disable key autorepeat * @rows: bitmask for the rows * @cols: bitmask for the columns * @keymap: the keymap */ struct stmpe_keypad { struct stmpe *stmpe; struct input_dev *input; const struct stmpe_keypad_variant *variant; unsigned int debounce_ms; unsigned int scan_count; bool no_autorepeat; unsigned int rows; unsigned int cols; unsigned short keymap[STMPE_KEYPAD_KEYMAP_MAX_SIZE]; }; static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data) { const struct stmpe_keypad_variant *variant = keypad->variant; struct stmpe *stmpe = keypad->stmpe; int ret; int i; if (variant->auto_increment) return stmpe_block_read(stmpe, STMPE_KPC_DATA_BYTE0, variant->num_data, data); for (i = 0; i < variant->num_data; i++) { ret = stmpe_reg_read(stmpe, STMPE_KPC_DATA_BYTE0 + i); if (ret < 0) return ret; data[i] = ret; } return 0; } static irqreturn_t stmpe_keypad_irq(int irq, void *dev) { struct stmpe_keypad *keypad = dev; struct input_dev *input = keypad->input; const struct stmpe_keypad_variant *variant = keypad->variant; u8 fifo[MAX_NUM_DATA]; int ret; int i; ret = stmpe_keypad_read_data(keypad, fifo); if (ret < 0) return IRQ_NONE; for (i = 0; i < variant->num_normal_data; i++) { u8 data = fifo[i]; int row = (data & STMPE_KPC_DATA_ROW) >> 3; int col = data & STMPE_KPC_DATA_COL; int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT); bool up = data & STMPE_KPC_DATA_UP; if ((data & STMPE_KPC_DATA_NOKEY_MASK) == STMPE_KPC_DATA_NOKEY_MASK) continue; input_event(input, EV_MSC, MSC_SCAN, code); input_report_key(input, keypad->keymap[code], !up); input_sync(input); } return IRQ_HANDLED; } static int stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad) { const struct stmpe_keypad_variant *variant = keypad->variant; unsigned int col_gpios = variant->col_gpios; unsigned int row_gpios = variant->row_gpios; struct stmpe *stmpe = keypad->stmpe; u8 pureg = stmpe->regs[STMPE_IDX_GPPUR_LSB]; unsigned int pins = 0; unsigned int pu_pins = 0; int ret; int i; /* * Figure out which pins need to be set to the keypad alternate * function. * * {cols,rows}_gpios are bitmasks of which pins on the chip can be used * for the keypad. * * keypad->{cols,rows} are a bitmask of which pins (of the ones useable * for the keypad) are used on the board. */ for (i = 0; i < variant->max_cols; i++) { int num = __ffs(col_gpios); if (keypad->cols & (1 << i)) { pins |= 1 << num; pu_pins |= 1 << num; } col_gpios &= ~(1 << num); } for (i = 0; i < variant->max_rows; i++) { int num = __ffs(row_gpios); if (keypad->rows & (1 << i)) pins |= 1 << num; row_gpios &= ~(1 << num); } ret = stmpe_set_altfunc(stmpe, pins, STMPE_BLOCK_KEYPAD); if (ret) return ret; /* * On STMPE24xx, set pin bias to pull-up on all keypad input * pins (columns), this incidentally happen to be maximum 8 pins * and placed at GPIO0-7 so only the LSB of the pull up register * ever needs to be written. */ if (variant->set_pullup) { u8 val; ret = stmpe_reg_read(stmpe, pureg); if (ret) return ret; /* Do not touch unused pins, may be used for GPIO */ val = ret & ~pu_pins; val |= pu_pins; ret = stmpe_reg_write(stmpe, pureg, val); } return 0; } static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad) { const struct stmpe_keypad_variant *variant = keypad->variant; struct stmpe *stmpe = keypad->stmpe; int ret; if (keypad->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE) return -EINVAL; if (keypad->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT) return -EINVAL; ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD); if (ret < 0) return ret; ret = stmpe_keypad_altfunc_init(keypad); if (ret < 0) return ret; ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols); if (ret < 0) return ret; ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows); if (ret < 0) return ret; if (variant->max_rows > 8) { ret = stmpe_set_bits(stmpe, STMPE_KPC_ROW_MSB, STMPE_KPC_ROW_MSB_ROWS, keypad->rows >> 8); if (ret < 0) return ret; } ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB, STMPE_KPC_CTRL_MSB_SCAN_COUNT, keypad->scan_count << 4); if (ret < 0) return ret; return stmpe_set_bits(stmpe, STMPE_KPC_CTRL_LSB, STMPE_KPC_CTRL_LSB_SCAN | STMPE_KPC_CTRL_LSB_DEBOUNCE, STMPE_KPC_CTRL_LSB_SCAN | (keypad->debounce_ms << 1)); } static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad, u32 used_rows, u32 used_cols) { int row, col; for (row = 0; row < used_rows; row++) { for (col = 0; col < used_cols; col++) { int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT); if (keypad->keymap[code] != KEY_RESERVED) { keypad->rows |= 1 << row; keypad->cols |= 1 << col; } } } } static int stmpe_keypad_probe(struct platform_device *pdev) { struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent); struct device_node *np = pdev->dev.of_node; struct stmpe_keypad *keypad; struct input_dev *input; u32 rows; u32 cols; int error; int irq; irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; keypad = devm_kzalloc(&pdev->dev, sizeof(struct stmpe_keypad), GFP_KERNEL); if (!keypad) return -ENOMEM; keypad->stmpe = stmpe; keypad->variant = &stmpe_keypad_variants[stmpe->partnum]; of_property_read_u32(np, "debounce-interval", &keypad->debounce_ms); of_property_read_u32(np, "st,scan-count", &keypad->scan_count); keypad->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat"); input = devm_input_allocate_device(&pdev->dev); if (!input) return -ENOMEM; input->name = "STMPE keypad"; input->id.bustype = BUS_I2C; input->dev.parent = &pdev->dev; error = matrix_keypad_parse_properties(&pdev->dev, &rows, &cols); if (error) return error; error = matrix_keypad_build_keymap(NULL, NULL, rows, cols, keypad->keymap, input); if (error) return error; input_set_capability(input, EV_MSC, MSC_SCAN); if (!keypad->no_autorepeat) __set_bit(EV_REP, input->evbit); stmpe_keypad_fill_used_pins(keypad, rows, cols); keypad->input = input; error = stmpe_keypad_chip_init(keypad); if (error < 0) return error; error = devm_request_threaded_irq(&pdev->dev, irq, NULL, stmpe_keypad_irq, IRQF_ONESHOT, "stmpe-keypad", keypad); if (error) { dev_err(&pdev->dev, "unable to get irq: %d\n", error); return error; } error = input_register_device(input); if (error) { dev_err(&pdev->dev, "unable to register input device: %d\n", error); return error; } platform_set_drvdata(pdev, keypad); return 0; } static void stmpe_keypad_remove(struct platform_device *pdev) { struct stmpe_keypad *keypad = platform_get_drvdata(pdev); stmpe_disable(keypad->stmpe, STMPE_BLOCK_KEYPAD); } static struct platform_driver stmpe_keypad_driver = { .driver.name = "stmpe-keypad", .probe = stmpe_keypad_probe, .remove_new = stmpe_keypad_remove, }; module_platform_driver(stmpe_keypad_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("STMPExxxx keypad driver"); MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
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