From: Marek Vasut marek.vasut@gmail.com
Signed-off-by: Marek Vasut marek.vasut@gmail.com Signed-off-by: Vasily Khoruzhick anarsoul@gmail.com [vasily: adapted Marek's old version for newer u-boot, fixed multiple keypresses handling] --- v2: use struct-based access to regs, minor cleanup v3: fix multiple keypresses handling, minor cleanup v4: another minor cleanup v5: fix indentation issues in scan_keys(), remove udelay, increase PXA_KEYPAD_TIMEOUT (due to removed udelay) v6: remove ifdefs around WATCHDOG_RESET()
arch/arm/include/asm/arch-pxa/pxa-regs.h | 52 ----- arch/arm/include/asm/arch-pxa/regs-keypad.h | 84 ++++++++ drivers/input/Makefile | 2 + drivers/input/pxa27x-mkp.c | 289 +++++++++++++++++++++++++++ 4 files changed, 375 insertions(+), 52 deletions(-) create mode 100644 arch/arm/include/asm/arch-pxa/regs-keypad.h create mode 100644 drivers/input/pxa27x-mkp.c
diff --git a/arch/arm/include/asm/arch-pxa/pxa-regs.h b/arch/arm/include/asm/arch-pxa/pxa-regs.h index b81b42c..d562658 100644 --- a/arch/arm/include/asm/arch-pxa/pxa-regs.h +++ b/arch/arm/include/asm/arch-pxa/pxa-regs.h @@ -2567,58 +2567,6 @@ typedef void (*ExcpHndlr) (void) ; #define OVL2C1_O2EN (1<<31) /* Enable bit for Overlay 2 */ #define CCR_CEN (1<<31) /* Enable bit for Cursor */
-/* Keypad controller */ - -#define KPC 0x41500000 /* Keypad Interface Control register */ -#define KPDK 0x41500008 /* Keypad Interface Direct Key register */ -#define KPREC 0x41500010 /* Keypad Intefcace Rotary Encoder register */ -#define KPMK 0x41500018 /* Keypad Intefcace Matrix Key register */ -#define KPAS 0x41500020 /* Keypad Interface Automatic Scan register */ -#define KPASMKP0 0x41500028 /* Keypad Interface Automatic Scan Multiple Key Presser register 0 */ -#define KPASMKP1 0x41500030 /* Keypad Interface Automatic Scan Multiple Key Presser register 1 */ -#define KPASMKP2 0x41500038 /* Keypad Interface Automatic Scan Multiple Key Presser register 2 */ -#define KPASMKP3 0x41500040 /* Keypad Interface Automatic Scan Multiple Key Presser register 3 */ -#define KPKDI 0x41500048 /* Keypad Interface Key Debounce Interval register */ - -#define KPC_AS (0x1 << 30) /* Automatic Scan bit */ -#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */ -#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */ -#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */ -#define KPC_MS7 (0x1 << 20) /* Matrix scan line 7 */ -#define KPC_MS6 (0x1 << 19) /* Matrix scan line 6 */ -#define KPC_MS5 (0x1 << 18) /* Matrix scan line 5 */ -#define KPC_MS4 (0x1 << 17) /* Matrix scan line 4 */ -#define KPC_MS3 (0x1 << 16) /* Matrix scan line 3 */ -#define KPC_MS2 (0x1 << 15) /* Matrix scan line 2 */ -#define KPC_MS1 (0x1 << 14) /* Matrix scan line 1 */ -#define KPC_MS0 (0x1 << 13) /* Matrix scan line 0 */ -#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */ -#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */ -#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Key Debounce select */ -#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */ -#define KPC_DEE0 (0x1 << 2) /* Rotary Encoder 0 Enable */ -#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */ -#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */ - -#define KPDK_DKP (0x1 << 31) -#define KPDK_DK7 (0x1 << 7) -#define KPDK_DK6 (0x1 << 6) -#define KPDK_DK5 (0x1 << 5) -#define KPDK_DK4 (0x1 << 4) -#define KPDK_DK3 (0x1 << 3) -#define KPDK_DK2 (0x1 << 2) -#define KPDK_DK1 (0x1 << 1) -#define KPDK_DK0 (0x1 << 0) - -#define KPREC_OF1 (0x1 << 31) -#define kPREC_UF1 (0x1 << 30) -#define KPREC_OF0 (0x1 << 15) -#define KPREC_UF0 (0x1 << 14) - -#define KPMK_MKP (0x1 << 31) -#define KPAS_SO (0x1 << 31) -#define KPASMKPx_SO (0x1 << 31) - #define GPIO113_BIT (1 << 17)/* GPIO113 in GPSR, GPCR, bit 17 */ #define PSLR 0x40F00034 #define PSTR 0x40F00038 /* Power Manager Standby Configuration Reg */ diff --git a/arch/arm/include/asm/arch-pxa/regs-keypad.h b/arch/arm/include/asm/arch-pxa/regs-keypad.h new file mode 100644 index 0000000..1909417 --- /dev/null +++ b/arch/arm/include/asm/arch-pxa/regs-keypad.h @@ -0,0 +1,84 @@ +/* + * Copyright (C) 2012 Vasily Khoruzhick anarsoul@gmail.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 02111-1307 USA + */ + +#ifndef __REGS_KEYPAD_H__ +#define __REGS_KEYPAD_H__ + +#define KEYPAD_BASE 0x41500000 + +struct kpasmkp_regs { + uint32_t kpasmkpx; + uint32_t reserved; +}; + +struct pxa_keypad_regs { + uint32_t kpc; + uint32_t reserved_1; + uint32_t kpdk; + uint32_t reserved_2; + uint32_t kprec; + uint32_t reserved_3; + uint32_t kpmk; + uint32_t reserved_4; + uint32_t kpas; + uint32_t reserved_5; + struct kpasmkp_regs kpasmkp[4]; + uint32_t kpkdi; +}; + +#define KPC_AS (0x1 << 30) /* Automatic Scan bit */ +#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */ +#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */ +#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */ +#define KPC_MS7 (0x1 << 20) /* Matrix scan line 7 */ +#define KPC_MS6 (0x1 << 19) /* Matrix scan line 6 */ +#define KPC_MS5 (0x1 << 18) /* Matrix scan line 5 */ +#define KPC_MS4 (0x1 << 17) /* Matrix scan line 4 */ +#define KPC_MS3 (0x1 << 16) /* Matrix scan line 3 */ +#define KPC_MS2 (0x1 << 15) /* Matrix scan line 2 */ +#define KPC_MS1 (0x1 << 14) /* Matrix scan line 1 */ +#define KPC_MS0 (0x1 << 13) /* Matrix scan line 0 */ +#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */ +#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */ +#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Key Debounce select */ +#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */ +#define KPC_DEE0 (0x1 << 2) /* Rotary Encoder 0 Enable */ +#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */ +#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */ + +#define KPDK_DKP (0x1 << 31) +#define KPDK_DK7 (0x1 << 7) +#define KPDK_DK6 (0x1 << 6) +#define KPDK_DK5 (0x1 << 5) +#define KPDK_DK4 (0x1 << 4) +#define KPDK_DK3 (0x1 << 3) +#define KPDK_DK2 (0x1 << 2) +#define KPDK_DK1 (0x1 << 1) +#define KPDK_DK0 (0x1 << 0) + +#define KPREC_OF1 (0x1 << 31) +#define kPREC_UF1 (0x1 << 30) +#define KPREC_OF0 (0x1 << 15) +#define KPREC_UF0 (0x1 << 14) + +#define KPMK_MKP (0x1 << 31) +#define KPAS_SO (0x1 << 31) +#define KPASMKPx_SO (0x1 << 31) + +#endif diff --git a/drivers/input/Makefile b/drivers/input/Makefile index 1f4dad3..792d29d 100644 --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -31,6 +31,8 @@ COBJS-y += keyboard.o pc_keyb.o COBJS-$(CONFIG_PS2MULT) += ps2mult.o ps2ser.o endif
+COBJS-$(CONFIG_PXA27X_MKP) += pxa27x-mkp.o + COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/drivers/input/pxa27x-mkp.c b/drivers/input/pxa27x-mkp.c new file mode 100644 index 0000000..00c5fc6 --- /dev/null +++ b/drivers/input/pxa27x-mkp.c @@ -0,0 +1,289 @@ +/* + * PXA27x matrix keypad controller driver + * + * Copyright (C) 2010 Marek Vasut marek.vasut@gmail.com + * Copyright (C) 2012 Vasily Khoruzhick anarsoul@gmail.com + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 02111-1307 USA + */ + +#include <common.h> +#include <stdio_dev.h> +#include <watchdog.h> +#include <asm/arch/regs-keypad.h> +#include <asm/io.h> + +#define DEVNAME "pxa27x-mkp" + +struct { + char row; + char col; + char key; + char shift; + char alt; + char ctrl; +} keymap[] = { + CONFIG_PXA27X_MKP_KEYMAP, +}; + +static unsigned char queue[64] = {0}; +static int queue_len; +static struct pxa_keypad_regs *regs = (struct pxa_keypad_regs *)KEYPAD_BASE; + +/* autorepeat stuff */ +static int last_key_row = 0xff, last_key_col = 0xff; +static char key_counter; + +/* number of key scans before autorepeat kicks in */ +#ifndef CONFIG_PXA27X_KEY_REPEAT_FIRST +#define CONFIG_PXA27X_KEY_REPEAT_FIRST 12 +#endif +#ifndef CONFIG_PXA27X_KEY_REPEAT_NEXT +#define CONFIG_PXA27X_KEY_REPEAT_NEXT 2 +#endif + +/* Number of cycles to wait */ +#define PXA_KEYPAD_TIMEOUT 100000 + +enum { + MOD_NONE, + MOD_SHIFT, + MOD_ALT, + MOD_CTRL, +}; + +static int kbd_get_mdf(int row, int col) +{ + char mod_shift[2] = CONFIG_PXA27X_MKP_MOD_SHIFT; + char mod_alt[2] = CONFIG_PXA27X_MKP_MOD_ALT; + char mod_ctrl[2] = CONFIG_PXA27X_MKP_MOD_CTRL; + + if (mod_shift[0] == row && mod_shift[1] == col) + return MOD_SHIFT; + if (mod_alt[0] == row && mod_alt[1] == col) + return MOD_ALT; + if (mod_ctrl[0] == row && mod_ctrl[1] == col) + return MOD_CTRL; + return MOD_NONE; +} + +static int kbd_lookup(int row, int col, int mod) +{ + int i = 0; + char key = 0xff; + + while (!(keymap[i].col == 0xff && keymap[i].row == 0xff)) { + if (keymap[i].row != row || keymap[i].col != col) { + i++; + continue; + } + switch (mod) { + case MOD_NONE: + key = keymap[i].key; + break; + case MOD_SHIFT: + key = keymap[i].shift; + break; + case MOD_ALT: + key = keymap[i].alt; + break; + case MOD_CTRL: + key = keymap[i].ctrl; + break; + } + if (key == 0xff) { + i++; + continue; + } + + if (row != last_key_row || col != last_key_col) { + queue[queue_len++] = key; + last_key_row = row; + last_key_col = col; + key_counter = 0; + } else /* same key as before */ + if (key_counter < CONFIG_PXA27X_KEY_REPEAT_FIRST) { + /* ignore key press */ + key_counter++; + } else { + /* ok, autorepeat */ + queue[queue_len++] = key; + key_counter = CONFIG_PXA27X_KEY_REPEAT_FIRST + - CONFIG_PXA27X_KEY_REPEAT_NEXT; + } + i++; + } + return key; +} + +static int scan_keys(int scan_modif, uint32_t kpasmkp[4]) +{ + uint32_t reg = 0; + int col, row; + static int mod = MOD_NONE; + int key; + for (col = 0; col < 8; col += 1) { + reg = kpasmkp[col >> 1]; + reg >>= 16 * (col % 2); + for (row = 0; row < 8; row++) { + if (!(reg & (1 << row))) + continue; + + if (scan_modif) { + mod = kbd_get_mdf(row, col); + if (mod != MOD_NONE) + return mod; + } else { + key = kbd_lookup(row, col, mod); + if (key != 0xff) + return key; + } + } + } + + if (scan_modif) + return MOD_NONE; + else + return 0xff; +} + +static void kbd_read(void) +{ + uint32_t reg; + int col, row, i, have_new_key = 0; + int numkeys; + int mod = MOD_NONE; + unsigned int timeout = PXA_KEYPAD_TIMEOUT; + static uint32_t kpasmkp_old[4]; + uint32_t kpasmkp[4], kpasmkp_diff[4]; + + /* start one automatic scan */ + writel(readl(®s->kpc) | KPC_AS, ®s->kpc); + + /* wait for scan to finish */ + while (timeout--) { + if (!(readl(®s->kpc) & KPC_AS)) + break; + WATCHDOG_RESET(); + } + + if (!timeout) + return; + + numkeys = (readl(®s->kpas) >> 26) & 0x1f; + switch (numkeys) { + case 0: + /* no key pressed, clear autorepeat counter */ + key_counter = 0; + last_key_row = last_key_col = 0xff; + for (i = 0; i < ARRAY_SIZE(kpasmkp); i++) + kpasmkp[i] = 0; + break; + case 1: + reg = readl(®s->kpas) & 0xff; + col = reg & 0x0f; + row = reg >> 4; + for (i = 0; i < ARRAY_SIZE(kpasmkp); i++) + kpasmkp[i] = 0; + kpasmkp[col >> 1] |= (1 << (row + 16 * (col % 2))); + + break; + default: + for (i = 0; i < ARRAY_SIZE(kpasmkp); i++) { + timeout = PXA_KEYPAD_TIMEOUT; + while (timeout--) { + kpasmkp[i] = readl(®s->kpasmkp[i].kpasmkpx); + if (!(kpasmkp[i] & KPASMKPx_SO)) + break; + WATCHDOG_RESET(); + } + if (!timeout) + kpasmkp[i] = 0; + } + break; + } + + /* Find new keypress */ + for (i = 0; i < ARRAY_SIZE(kpasmkp); i++) { + kpasmkp_diff[i] = (kpasmkp_old[i] ^ kpasmkp[i]) & + kpasmkp[i]; + if (kpasmkp_diff[i]) + have_new_key = 1; + kpasmkp_old[i] = kpasmkp[i]; + } + + if (!numkeys) + return; + + /* Scan for modifiers */ + mod = scan_keys(1, kpasmkp); + if (!have_new_key) { + /* Check if old key is still pressed */ + if (kpasmkp[last_key_col >> 1] & + (1 << (last_key_row + 16 * (last_key_col % 2)))) + kbd_lookup(last_key_row, last_key_col, mod); + + } else { + key_counter = 0; + last_key_row = last_key_col = 0xff; + scan_keys(0, kpasmkp_diff); + } +} + +static int kbd_getc(void) +{ + if (!queue_len) { + kbd_read(); + udelay(CONFIG_PXA27X_MKP_DELAY); + } + + if (queue_len) + return queue[--queue_len]; + else + return 0; +} + +static int kbd_testc(void) +{ + if (!queue_len) + kbd_read(); + return queue_len; +} + +int drv_keyboard_init(void) +{ + int error = 0; + struct stdio_dev kbddev; + + writel((CONFIG_PXA27X_MKP_MKP_ROWS << 26) | + (CONFIG_PXA27X_MKP_MKP_COLS << 23) | + (0xff << 13) | KPC_ME, ®s->kpc); + writel(CONFIG_PXA27X_MKP_DEBOUNCE, ®s->kpkdi); + + memset(&kbddev, 0, sizeof(kbddev)); + strcpy(kbddev.name, DEVNAME); + kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; + kbddev.putc = NULL; + kbddev.puts = NULL; + kbddev.getc = kbd_getc; + kbddev.tstc = kbd_testc; + + error = stdio_register(&kbddev); + return error; +}