^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) ST-Ericsson SA 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/input/matrix_keypad.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/stmpe.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /* These are at the same addresses in all STMPE variants */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define STMPE_KPC_COL 0x60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define STMPE_KPC_ROW_MSB 0x61
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define STMPE_KPC_ROW_LSB 0x62
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define STMPE_KPC_CTRL_MSB 0x63
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define STMPE_KPC_CTRL_LSB 0x64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define STMPE_KPC_COMBI_KEY_0 0x65
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define STMPE_KPC_COMBI_KEY_1 0x66
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define STMPE_KPC_COMBI_KEY_2 0x67
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define STMPE_KPC_DATA_BYTE0 0x68
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define STMPE_KPC_DATA_BYTE1 0x69
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define STMPE_KPC_DATA_BYTE2 0x6a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define STMPE_KPC_DATA_BYTE3 0x6b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define STMPE_KPC_DATA_BYTE4 0x6c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define STMPE_KPC_CTRL_LSB_SCAN (0x1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define STMPE_KPC_CTRL_LSB_DEBOUNCE (0x7f << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define STMPE_KPC_CTRL_MSB_SCAN_COUNT (0xf << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define STMPE_KPC_ROW_MSB_ROWS 0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define STMPE_KPC_DATA_UP (0x1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define STMPE_KPC_DATA_ROW (0xf << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define STMPE_KPC_DATA_COL (0x7 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define STMPE_KPC_DATA_NOKEY_MASK 0x78
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define STMPE_KEYPAD_MAX_DEBOUNCE 127
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define STMPE_KEYPAD_MAX_SCAN_COUNT 15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define STMPE_KEYPAD_MAX_ROWS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define STMPE_KEYPAD_MAX_COLS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define STMPE_KEYPAD_ROW_SHIFT 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define STMPE_KEYPAD_KEYMAP_MAX_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) (STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define STMPE1601_NUM_DATA 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define STMPE2401_NUM_DATA 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define STMPE2403_NUM_DATA 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* Make sure it covers all cases above */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define MAX_NUM_DATA 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * struct stmpe_keypad_variant - model-specific attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * @auto_increment: whether the KPC_DATA_BYTE register address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * auto-increments on multiple read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * @set_pullup: whether the pins need to have their pull-ups set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * @num_data: number of data bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * @num_normal_data: number of normal keys' data bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * @max_cols: maximum number of columns supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * @max_rows: maximum number of rows supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * @col_gpios: bitmask of gpios which can be used for columns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * @row_gpios: bitmask of gpios which can be used for rows
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct stmpe_keypad_variant {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) bool auto_increment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) bool set_pullup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int num_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int num_normal_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int max_cols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int max_rows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) unsigned int col_gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) unsigned int row_gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static const struct stmpe_keypad_variant stmpe_keypad_variants[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) [STMPE1601] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .auto_increment = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .num_data = STMPE1601_NUM_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .num_normal_data = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .max_cols = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .max_rows = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .col_gpios = 0x000ff, /* GPIO 0 - 7 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .row_gpios = 0x0ff00, /* GPIO 8 - 15 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) [STMPE2401] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .auto_increment = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .set_pullup = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .num_data = STMPE2401_NUM_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .num_normal_data = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .max_cols = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .max_rows = 12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .col_gpios = 0x0000ff, /* GPIO 0 - 7*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .row_gpios = 0x1f7f00, /* GPIO 8-14, 16-20 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) [STMPE2403] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .auto_increment = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .set_pullup = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .num_data = STMPE2403_NUM_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .num_normal_data = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .max_cols = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .max_rows = 12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .col_gpios = 0x0000ff, /* GPIO 0 - 7*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .row_gpios = 0x1fef00, /* GPIO 8-14, 16-20 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * struct stmpe_keypad - STMPE keypad state container
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * @stmpe: pointer to parent STMPE device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * @input: spawned input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * @variant: STMPE variant
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * @debounce_ms: debounce interval, in ms. Maximum is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * %STMPE_KEYPAD_MAX_DEBOUNCE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * @scan_count: number of key scanning cycles to confirm key data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * @no_autorepeat: disable key autorepeat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * @rows: bitmask for the rows
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * @cols: bitmask for the columns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * @keymap: the keymap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct stmpe_keypad {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct stmpe *stmpe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) const struct stmpe_keypad_variant *variant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) unsigned int debounce_ms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned int scan_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) bool no_autorepeat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) unsigned int rows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) unsigned int cols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned short keymap[STMPE_KEYPAD_KEYMAP_MAX_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) const struct stmpe_keypad_variant *variant = keypad->variant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct stmpe *stmpe = keypad->stmpe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (variant->auto_increment)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return stmpe_block_read(stmpe, STMPE_KPC_DATA_BYTE0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) variant->num_data, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) for (i = 0; i < variant->num_data; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) ret = stmpe_reg_read(stmpe, STMPE_KPC_DATA_BYTE0 + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) data[i] = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static irqreturn_t stmpe_keypad_irq(int irq, void *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct stmpe_keypad *keypad = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct input_dev *input = keypad->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) const struct stmpe_keypad_variant *variant = keypad->variant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) u8 fifo[MAX_NUM_DATA];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) ret = stmpe_keypad_read_data(keypad, fifo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) for (i = 0; i < variant->num_normal_data; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) u8 data = fifo[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int row = (data & STMPE_KPC_DATA_ROW) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int col = data & STMPE_KPC_DATA_COL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int code = MATRIX_SCAN_CODE(row, col, STMPE_KEYPAD_ROW_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) bool up = data & STMPE_KPC_DATA_UP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if ((data & STMPE_KPC_DATA_NOKEY_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) == STMPE_KPC_DATA_NOKEY_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) input_event(input, EV_MSC, MSC_SCAN, code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) input_report_key(input, keypad->keymap[code], !up);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) input_sync(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) const struct stmpe_keypad_variant *variant = keypad->variant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) unsigned int col_gpios = variant->col_gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) unsigned int row_gpios = variant->row_gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct stmpe *stmpe = keypad->stmpe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) u8 pureg = stmpe->regs[STMPE_IDX_GPPUR_LSB];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) unsigned int pins = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) unsigned int pu_pins = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * Figure out which pins need to be set to the keypad alternate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * {cols,rows}_gpios are bitmasks of which pins on the chip can be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * for the keypad.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * keypad->{cols,rows} are a bitmask of which pins (of the ones useable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * for the keypad) are used on the board.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) for (i = 0; i < variant->max_cols; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int num = __ffs(col_gpios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (keypad->cols & (1 << i)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) pins |= 1 << num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) pu_pins |= 1 << num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) col_gpios &= ~(1 << num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) for (i = 0; i < variant->max_rows; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int num = __ffs(row_gpios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (keypad->rows & (1 << i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) pins |= 1 << num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) row_gpios &= ~(1 << num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) ret = stmpe_set_altfunc(stmpe, pins, STMPE_BLOCK_KEYPAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * On STMPE24xx, set pin bias to pull-up on all keypad input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * pins (columns), this incidentally happen to be maximum 8 pins
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * and placed at GPIO0-7 so only the LSB of the pull up register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * ever needs to be written.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (variant->set_pullup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) u8 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) ret = stmpe_reg_read(stmpe, pureg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /* Do not touch unused pins, may be used for GPIO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) val = ret & ~pu_pins;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) val |= pu_pins;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ret = stmpe_reg_write(stmpe, pureg, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) const struct stmpe_keypad_variant *variant = keypad->variant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct stmpe *stmpe = keypad->stmpe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (keypad->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (keypad->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) ret = stmpe_keypad_altfunc_init(keypad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) ret = stmpe_reg_write(stmpe, STMPE_KPC_COL, keypad->cols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) ret = stmpe_reg_write(stmpe, STMPE_KPC_ROW_LSB, keypad->rows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (variant->max_rows > 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) ret = stmpe_set_bits(stmpe, STMPE_KPC_ROW_MSB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) STMPE_KPC_ROW_MSB_ROWS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) keypad->rows >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) STMPE_KPC_CTRL_MSB_SCAN_COUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) keypad->scan_count << 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return stmpe_set_bits(stmpe, STMPE_KPC_CTRL_LSB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) STMPE_KPC_CTRL_LSB_SCAN |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) STMPE_KPC_CTRL_LSB_DEBOUNCE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) STMPE_KPC_CTRL_LSB_SCAN |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) (keypad->debounce_ms << 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) u32 used_rows, u32 used_cols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) int row, col;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) for (row = 0; row < used_rows; row++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) for (col = 0; col < used_cols; col++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) int code = MATRIX_SCAN_CODE(row, col,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) STMPE_KEYPAD_ROW_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (keypad->keymap[code] != KEY_RESERVED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) keypad->rows |= 1 << row;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) keypad->cols |= 1 << col;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) static int stmpe_keypad_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct device_node *np = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) struct stmpe_keypad *keypad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) u32 rows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) u32 cols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) keypad = devm_kzalloc(&pdev->dev, sizeof(struct stmpe_keypad),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (!keypad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) keypad->stmpe = stmpe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) keypad->variant = &stmpe_keypad_variants[stmpe->partnum];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) of_property_read_u32(np, "debounce-interval", &keypad->debounce_ms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) of_property_read_u32(np, "st,scan-count", &keypad->scan_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) keypad->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) input = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) input->name = "STMPE keypad";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) input->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) input->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) error = matrix_keypad_parse_properties(&pdev->dev, &rows, &cols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) error = matrix_keypad_build_keymap(NULL, NULL, rows, cols,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) keypad->keymap, input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) input_set_capability(input, EV_MSC, MSC_SCAN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (!keypad->no_autorepeat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) __set_bit(EV_REP, input->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) stmpe_keypad_fill_used_pins(keypad, rows, cols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) keypad->input = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) error = stmpe_keypad_chip_init(keypad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) error = devm_request_threaded_irq(&pdev->dev, irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) NULL, stmpe_keypad_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) IRQF_ONESHOT, "stmpe-keypad", keypad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) dev_err(&pdev->dev, "unable to get irq: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) error = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) dev_err(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) "unable to register input device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) platform_set_drvdata(pdev, keypad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) static int stmpe_keypad_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct stmpe_keypad *keypad = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) stmpe_disable(keypad->stmpe, STMPE_BLOCK_KEYPAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static struct platform_driver stmpe_keypad_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) .driver.name = "stmpe-keypad",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) .driver.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) .probe = stmpe_keypad_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) .remove = stmpe_keypad_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) module_platform_driver(stmpe_keypad_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) MODULE_DESCRIPTION("STMPExxxx keypad driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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