2007-03-16 04:58:52 +00:00
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/*
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2008-01-31 05:56:46 +00:00
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* linux/drivers/input/keyboard/pxa27x_keypad.c
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2007-03-16 04:58:52 +00:00
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*
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* Driver for the pxa27x matrix keyboard controller.
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*
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* Created: Feb 22, 2007
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* Author: Rodolfo Giometti <giometti@linux.it>
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*
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* Based on a previous implementations by Kevin O'Connor
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* <kevin_at_koconnor.net> and Alex Osborne <bobofdoom@gmail.com> and
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* on some suggestions by Nicolas Pitre <nico@cam.org>.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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2007-08-20 09:19:39 +00:00
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#include <linux/clk.h>
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#include <linux/err.h>
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2007-03-16 04:58:52 +00:00
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/irqs.h>
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2008-01-31 05:56:46 +00:00
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#include <asm/arch/pxa27x_keypad.h>
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2007-03-16 04:58:52 +00:00
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2008-01-31 05:56:46 +00:00
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#define DRIVER_NAME "pxa27x-keypad"
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2007-03-16 04:58:52 +00:00
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2008-01-31 05:58:52 +00:00
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#define KPC_MKRN(n) ((((n) & 0x7) - 1) << 26) /* matrix key row number */
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#define KPC_MKCN(n) ((((n) & 0x7) - 1) << 23) /* matrix key column number */
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#define KPC_DKN(n) ((((n) & 0x7) - 1) << 6) /* direct key number */
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2008-01-31 05:59:03 +00:00
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#define KPDK_DKP (0x1 << 31)
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#define KPDK_DK(n) ((n) & 0xff)
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2008-01-31 05:58:37 +00:00
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#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
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#define KPAS_RP(n) (((n) >> 4) & 0xf)
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#define KPAS_CP(n) ((n) & 0xf)
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2007-03-16 04:58:52 +00:00
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2008-01-31 05:58:37 +00:00
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#define KPASMKP_MKC_MASK (0xff)
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#define MAX_MATRIX_KEY_NUM (8 * 8)
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struct pxa27x_keypad {
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struct pxa27x_keypad_platform_data *pdata;
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struct clk *clk;
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struct input_dev *input_dev;
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/* matrix key code map */
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unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
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/* state row bits of each column scan */
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uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
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2008-01-31 05:59:03 +00:00
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uint32_t direct_key_state;
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unsigned int direct_key_mask;
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int rotary_rel_code[2];
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int rotary_up_key[2];
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int rotary_down_key[2];
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2008-01-31 05:58:37 +00:00
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};
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static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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struct input_dev *input_dev = keypad->input_dev;
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unsigned int *key;
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int i;
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key = &pdata->matrix_key_map[0];
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for (i = 0; i < pdata->matrix_key_map_size; i++, key++) {
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int row = ((*key) >> 28) & 0xf;
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int col = ((*key) >> 24) & 0xf;
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int code = (*key) & 0xffffff;
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keypad->matrix_keycodes[(row << 3) + col] = code;
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set_bit(code, input_dev->keybit);
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}
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2008-01-31 05:59:03 +00:00
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keypad->rotary_up_key[0] = pdata->rotary0_up_key;
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keypad->rotary_up_key[1] = pdata->rotary1_up_key;
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keypad->rotary_down_key[0] = pdata->rotary0_down_key;
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keypad->rotary_down_key[1] = pdata->rotary1_down_key;
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keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
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keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
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if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
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set_bit(pdata->rotary0_up_key, input_dev->keybit);
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set_bit(pdata->rotary0_down_key, input_dev->keybit);
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} else
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set_bit(pdata->rotary0_rel_code, input_dev->relbit);
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if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
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set_bit(pdata->rotary1_up_key, input_dev->keybit);
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set_bit(pdata->rotary1_down_key, input_dev->keybit);
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} else
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set_bit(pdata->rotary1_rel_code, input_dev->relbit);
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2008-01-31 05:58:37 +00:00
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}
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static inline unsigned int lookup_matrix_keycode(
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struct pxa27x_keypad *keypad, int row, int col)
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{
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return keypad->matrix_keycodes[(row << 3) + col];
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}
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static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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int row, col, num_keys_pressed = 0;
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uint32_t new_state[MAX_MATRIX_KEY_COLS];
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uint32_t kpas = KPAS;
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num_keys_pressed = KPAS_MUKP(kpas);
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memset(new_state, 0, sizeof(new_state));
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if (num_keys_pressed == 0)
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goto scan;
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if (num_keys_pressed == 1) {
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col = KPAS_CP(kpas);
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row = KPAS_RP(kpas);
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/* if invalid row/col, treat as no key pressed */
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if (col >= pdata->matrix_key_cols ||
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row >= pdata->matrix_key_rows)
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goto scan;
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new_state[col] = (1 << row);
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goto scan;
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}
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if (num_keys_pressed > 1) {
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uint32_t kpasmkp0 = KPASMKP0;
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uint32_t kpasmkp1 = KPASMKP1;
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uint32_t kpasmkp2 = KPASMKP2;
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uint32_t kpasmkp3 = KPASMKP3;
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new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
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new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
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new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
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new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
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new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
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new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
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new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
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new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
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}
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scan:
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for (col = 0; col < pdata->matrix_key_cols; col++) {
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uint32_t bits_changed;
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bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
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if (bits_changed == 0)
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continue;
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for (row = 0; row < pdata->matrix_key_rows; row++) {
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if ((bits_changed & (1 << row)) == 0)
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continue;
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input_report_key(keypad->input_dev,
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lookup_matrix_keycode(keypad, row, col),
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new_state[col] & (1 << row));
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}
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}
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input_sync(keypad->input_dev);
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memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
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}
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2007-08-20 09:19:39 +00:00
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2008-01-31 05:58:52 +00:00
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#define DEFAULT_KPREC (0x007f007f)
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2008-01-31 05:59:03 +00:00
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static inline int rotary_delta(uint32_t kprec)
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{
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if (kprec & KPREC_OF0)
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return (kprec & 0xff) + 0x7f;
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else if (kprec & KPREC_UF0)
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return (kprec & 0xff) - 0x7f - 0xff;
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else
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return (kprec & 0xff) - 0x7f;
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}
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static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
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{
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struct input_dev *dev = keypad->input_dev;
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if (delta == 0)
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return;
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if (keypad->rotary_up_key[r] && keypad->rotary_down_key[r]) {
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int keycode = (delta > 0) ? keypad->rotary_up_key[r] :
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keypad->rotary_down_key[r];
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/* simulate a press-n-release */
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input_report_key(dev, keycode, 1);
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input_sync(dev);
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input_report_key(dev, keycode, 0);
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input_sync(dev);
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} else {
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input_report_rel(dev, keypad->rotary_rel_code[r], delta);
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input_sync(dev);
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}
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}
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static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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uint32_t kprec;
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/* read and reset to default count value */
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kprec = KPREC;
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KPREC = DEFAULT_KPREC;
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if (pdata->enable_rotary0)
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report_rotary_event(keypad, 0, rotary_delta(kprec));
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if (pdata->enable_rotary1)
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report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
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}
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static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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unsigned int new_state;
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uint32_t kpdk, bits_changed;
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int i;
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kpdk = KPDK;
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if (pdata->enable_rotary0 || pdata->enable_rotary1)
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pxa27x_keypad_scan_rotary(keypad);
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if (pdata->direct_key_map == NULL)
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return;
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new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
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bits_changed = keypad->direct_key_state ^ new_state;
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if (bits_changed == 0)
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return;
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for (i = 0; i < pdata->direct_key_num; i++) {
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if (bits_changed & (1 << i))
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input_report_key(keypad->input_dev,
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pdata->direct_key_map[i],
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(new_state & (1 << i)));
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}
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input_sync(keypad->input_dev);
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keypad->direct_key_state = new_state;
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}
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2008-01-31 05:56:46 +00:00
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static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
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2007-03-16 04:58:52 +00:00
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{
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2008-01-31 05:58:37 +00:00
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struct pxa27x_keypad *keypad = dev_id;
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2007-03-16 04:58:52 +00:00
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unsigned long kpc = KPC;
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2008-01-31 05:59:03 +00:00
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if (kpc & KPC_DI)
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pxa27x_keypad_scan_direct(keypad);
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2007-03-16 04:58:52 +00:00
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2008-01-31 05:58:37 +00:00
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if (kpc & KPC_MI)
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pxa27x_keypad_scan_matrix(keypad);
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2007-03-16 04:58:52 +00:00
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return IRQ_HANDLED;
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}
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2008-01-31 05:58:52 +00:00
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static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
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2007-03-16 04:58:52 +00:00
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{
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2008-01-31 05:58:52 +00:00
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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2008-01-31 05:59:03 +00:00
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unsigned int mask = 0, direct_key_num = 0;
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2008-01-31 05:58:52 +00:00
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unsigned long kpc = 0;
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2008-01-31 05:58:37 +00:00
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2008-01-31 05:58:52 +00:00
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/* enable matrix keys with automatic scan */
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if (pdata->matrix_key_rows && pdata->matrix_key_cols) {
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kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;
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kpc |= KPC_MKRN(pdata->matrix_key_rows) |
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KPC_MKCN(pdata->matrix_key_cols);
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}
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2007-03-16 04:58:52 +00:00
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2008-01-31 05:59:03 +00:00
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/* enable rotary key, debounce interval same as direct keys */
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if (pdata->enable_rotary0) {
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mask |= 0x03;
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direct_key_num = 2;
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kpc |= KPC_REE0;
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}
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if (pdata->enable_rotary1) {
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mask |= 0x0c;
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direct_key_num = 4;
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kpc |= KPC_REE1;
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}
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if (pdata->direct_key_num > direct_key_num)
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direct_key_num = pdata->direct_key_num;
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keypad->direct_key_mask = ((2 << direct_key_num) - 1) & ~mask;
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/* enable direct key */
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if (direct_key_num)
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kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
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2007-03-16 04:58:52 +00:00
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2008-01-31 05:59:03 +00:00
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KPC = kpc | KPC_RE_ZERO_DEB;
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2008-01-31 05:58:52 +00:00
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KPREC = DEFAULT_KPREC;
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}
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static int pxa27x_keypad_open(struct input_dev *dev)
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{
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struct pxa27x_keypad *keypad = input_get_drvdata(dev);
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2007-03-16 04:58:52 +00:00
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/* Enable unit clock */
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2008-01-31 05:58:37 +00:00
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|
|
clk_enable(keypad->clk);
|
2008-01-31 05:58:52 +00:00
|
|
|
pxa27x_keypad_config(keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static void pxa27x_keypad_close(struct input_dev *dev)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:58:37 +00:00
|
|
|
struct pxa27x_keypad *keypad = input_get_drvdata(dev);
|
|
|
|
|
2007-03-16 04:58:52 +00:00
|
|
|
/* Disable clock unit */
|
2008-01-31 05:58:37 +00:00
|
|
|
clk_disable(keypad->clk);
|
2007-03-16 04:58:52 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM
|
2008-01-31 05:56:46 +00:00
|
|
|
static int pxa27x_keypad_suspend(struct platform_device *pdev, pm_message_t state)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:58:37 +00:00
|
|
|
struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
|
2007-03-16 04:58:52 +00:00
|
|
|
|
2008-01-31 05:58:52 +00:00
|
|
|
clk_disable(keypad->clk);
|
2007-03-16 04:58:52 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static int pxa27x_keypad_resume(struct platform_device *pdev)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:58:37 +00:00
|
|
|
struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
|
|
|
|
struct input_dev *input_dev = keypad->input_dev;
|
2007-03-16 04:58:52 +00:00
|
|
|
|
|
|
|
mutex_lock(&input_dev->mutex);
|
|
|
|
|
|
|
|
if (input_dev->users) {
|
|
|
|
/* Enable unit clock */
|
2008-01-31 05:58:37 +00:00
|
|
|
clk_enable(keypad->clk);
|
2008-01-31 05:58:52 +00:00
|
|
|
pxa27x_keypad_config(keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&input_dev->mutex);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#else
|
2008-01-31 05:56:46 +00:00
|
|
|
#define pxa27x_keypad_suspend NULL
|
|
|
|
#define pxa27x_keypad_resume NULL
|
2007-03-16 04:58:52 +00:00
|
|
|
#endif
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:58:37 +00:00
|
|
|
struct pxa27x_keypad *keypad;
|
2007-03-16 04:58:52 +00:00
|
|
|
struct input_dev *input_dev;
|
2008-01-31 05:58:52 +00:00
|
|
|
int error;
|
2007-03-16 04:58:52 +00:00
|
|
|
|
2008-01-31 05:58:37 +00:00
|
|
|
keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
|
|
|
|
if (keypad == NULL) {
|
|
|
|
dev_err(&pdev->dev, "failed to allocate driver data\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
keypad->pdata = pdev->dev.platform_data;
|
|
|
|
if (keypad->pdata == NULL) {
|
|
|
|
dev_err(&pdev->dev, "no platform data defined\n");
|
|
|
|
error = -EINVAL;
|
|
|
|
goto failed_free;
|
|
|
|
}
|
|
|
|
|
|
|
|
keypad->clk = clk_get(&pdev->dev, "KBDCLK");
|
|
|
|
if (IS_ERR(keypad->clk)) {
|
|
|
|
dev_err(&pdev->dev, "failed to get keypad clock\n");
|
|
|
|
error = PTR_ERR(keypad->clk);
|
|
|
|
goto failed_free;
|
2007-08-20 09:19:39 +00:00
|
|
|
}
|
|
|
|
|
2007-03-16 04:58:52 +00:00
|
|
|
/* Create and register the input driver. */
|
|
|
|
input_dev = input_allocate_device();
|
|
|
|
if (!input_dev) {
|
2008-01-31 05:58:37 +00:00
|
|
|
dev_err(&pdev->dev, "failed to allocate input device\n");
|
2007-08-20 09:19:39 +00:00
|
|
|
error = -ENOMEM;
|
2008-01-31 05:58:37 +00:00
|
|
|
goto failed_put_clk;
|
2007-03-16 04:58:52 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
input_dev->name = DRIVER_NAME;
|
|
|
|
input_dev->id.bustype = BUS_HOST;
|
2008-01-31 05:56:46 +00:00
|
|
|
input_dev->open = pxa27x_keypad_open;
|
|
|
|
input_dev->close = pxa27x_keypad_close;
|
2007-04-12 05:34:58 +00:00
|
|
|
input_dev->dev.parent = &pdev->dev;
|
2007-03-16 04:58:52 +00:00
|
|
|
|
2008-01-31 05:58:37 +00:00
|
|
|
keypad->input_dev = input_dev;
|
|
|
|
input_set_drvdata(input_dev, keypad);
|
|
|
|
|
2007-10-19 06:40:32 +00:00
|
|
|
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
|
|
|
|
BIT_MASK(EV_REL);
|
2008-01-31 05:58:37 +00:00
|
|
|
|
|
|
|
pxa27x_keypad_build_keycode(keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
error = request_irq(IRQ_KEYPAD, pxa27x_keypad_irq_handler, IRQF_DISABLED,
|
2008-01-31 05:58:37 +00:00
|
|
|
DRIVER_NAME, keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
if (error) {
|
|
|
|
printk(KERN_ERR "Cannot request keypad IRQ\n");
|
|
|
|
goto err_free_dev;
|
|
|
|
}
|
|
|
|
|
2008-01-31 05:58:37 +00:00
|
|
|
platform_set_drvdata(pdev, keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
|
|
|
|
/* Register the input device */
|
|
|
|
error = input_register_device(input_dev);
|
|
|
|
if (error)
|
|
|
|
goto err_free_irq;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_free_irq:
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
free_irq(IRQ_KEYPAD, pdev);
|
|
|
|
err_free_dev:
|
|
|
|
input_free_device(input_dev);
|
2008-01-31 05:58:37 +00:00
|
|
|
failed_put_clk:
|
|
|
|
clk_put(keypad->clk);
|
|
|
|
failed_free:
|
|
|
|
kfree(keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:58:37 +00:00
|
|
|
struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
|
2007-03-16 04:58:52 +00:00
|
|
|
|
|
|
|
free_irq(IRQ_KEYPAD, pdev);
|
|
|
|
|
2008-01-31 05:58:37 +00:00
|
|
|
clk_disable(keypad->clk);
|
|
|
|
clk_put(keypad->clk);
|
|
|
|
|
|
|
|
input_unregister_device(keypad->input_dev);
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
kfree(keypad);
|
2007-03-16 04:58:52 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static struct platform_driver pxa27x_keypad_driver = {
|
|
|
|
.probe = pxa27x_keypad_probe,
|
|
|
|
.remove = __devexit_p(pxa27x_keypad_remove),
|
|
|
|
.suspend = pxa27x_keypad_suspend,
|
|
|
|
.resume = pxa27x_keypad_resume,
|
2007-03-16 04:58:52 +00:00
|
|
|
.driver = {
|
|
|
|
.name = DRIVER_NAME,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static int __init pxa27x_keypad_init(void)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:56:46 +00:00
|
|
|
return platform_driver_register(&pxa27x_keypad_driver);
|
2007-03-16 04:58:52 +00:00
|
|
|
}
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
static void __exit pxa27x_keypad_exit(void)
|
2007-03-16 04:58:52 +00:00
|
|
|
{
|
2008-01-31 05:56:46 +00:00
|
|
|
platform_driver_unregister(&pxa27x_keypad_driver);
|
2007-03-16 04:58:52 +00:00
|
|
|
}
|
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
module_init(pxa27x_keypad_init);
|
|
|
|
module_exit(pxa27x_keypad_exit);
|
2007-03-16 04:58:52 +00:00
|
|
|
|
2008-01-31 05:56:46 +00:00
|
|
|
MODULE_DESCRIPTION("PXA27x Keypad Controller Driver");
|
2007-03-16 04:58:52 +00:00
|
|
|
MODULE_LICENSE("GPL");
|