From: Marek Vasut <marek.va...@gmail.com>
Signed-off-by: Marek Vasut <marek.va...@gmail.com>
Signed-off-by: Vasily Khoruzhick <anars...@gmail.com>
[vasily: adapted Marek's old version for newer u-boot]
---
arch/arm/include/asm/arch-pxa/pxa-regs.h | 6 +-
drivers/input/Makefile | 2 +
drivers/input/pxa27x-mkp.c | 229 ++++++++++++++++++++++++++++++
3 files changed, 233 insertions(+), 4 deletions(-)
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..2886905 100644
--- a/arch/arm/include/asm/arch-pxa/pxa-regs.h
+++ b/arch/arm/include/asm/arch-pxa/pxa-regs.h
@@ -2574,10 +2574,8 @@ typedef void (*ExcpHndlr) (void) ;
#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 KPASMKP(x) (0x41500028 + ((x) << 3)) /* Keypad Interface Automatic
Scan
+ Multiple Key Presser
registers */
#define KPKDI 0x41500048 /* Keypad Interface Key Debounce Interval
register */
#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
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..cf59496
--- /dev/null
+++ b/drivers/input/pxa27x-mkp.c
@@ -0,0 +1,229 @@
+/*
+ * PXA27x matrix keypad controller driver
+ *
+ * Copyright (C) 2010 Marek Vasut <marek.va...@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 <asm/arch/pxa-regs.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;
+
+/* autorepeat stuff */
+static unsigned char last_key = 0xff;
+static char key_counter;
+
+/* number of key scans before autorepeat kicks in */
+#define KEY_REPEAT_FIRST 12
+#define KEY_REPEAT_NEXT 2
+
+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 void kbd_lookup(int row, int col, int mod)
+{
+ int i = 0;
+
+ while (!(keymap[i].col == 0xff && keymap[i].row == 0xff)) {
+ if (keymap[i].row == row && keymap[i].col == col) {
+ static char key = 0xff;
+ 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) {
+ if (key != last_key) {
+ queue[queue_len++] = key;
+ last_key = key;
+ key_counter = 0;
+ } else /* same key as before */
+ if (key_counter < KEY_REPEAT_FIRST) {
+ /* ignore key press */
+ key_counter++;
+ } else {
+ /* ok, autorepeat */
+ queue[queue_len++] = key;
+ key_counter = KEY_REPEAT_FIRST
+ - KEY_REPEAT_NEXT;
+ }
+ }
+ }
+ i++;
+ }
+}
+
+static void scan_keys(int modif)
+{
+ uint32_t reg;
+ int col, row;
+ int mod = MOD_NONE;
+ for (col = 0; col < 8; col += 2) {
+ while ((reg = readl(KPASMKP(col >> 1))) & KPASMKPx_SO);
+ for (row = 0; row < 8; row++) {
+ if (reg & (1 << row)) {
+ if (modif) {
+ mod = kbd_get_mdf(row, col);
+ if (mod != MOD_NONE)
+ return;
+ } else
+ kbd_lookup(row, col, mod);
+ }
+ if ((reg >> 16) & (1 << row)) {
+ if (modif) {
+ mod = kbd_get_mdf(row, col + 1);
+ if (mod != MOD_NONE)
+ return;
+ } else
+ kbd_lookup(row, col + 1, mod);
+ }
+ }
+ }
+}
+
+static void kbd_read(void)
+{
+ uint32_t reg;
+ int col, row;
+ int modif = 0;
+ int numkeys;
+ int mod = MOD_NONE;
+ writel(readl(KPC) | KPC_AS, KPC); /* start one automatic scan */
+ while (readl(KPC) & KPC_AS); /* wait for scan to finish */
+
+ numkeys = (readl(KPAS) >> 26) & 0x1f;
+ switch (numkeys) {
+ case 0:
+ /* no key pressed, clear autorepeat counter */
+ last_key = 0xff;
+ key_counter = 0;
+ break;
+ case 1:
+ reg = readl(KPAS) & 0xff;
+ col = reg & 0x0f;
+ row = reg >> 4;
+ if (kbd_get_mdf(row, col) != MOD_NONE) {
+ /* modifier only */
+ last_key = 0xff;
+ /* no real key, clear autorepeat counter */
+ key_counter = 0;
+ } else
+ kbd_lookup(row, col, mod);
+ break;
+ default:
+ /* multiple keys pressed, check KPASMKPx registers */
+ /* First scan for modifiers */
+ scan_keys(1);
+ /* Second for other keys */
+ scan_keys(0);
+ break;
+ }
+}
+
+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;
+ if (!keymap)
+ return -1;
+
+ queue_len = 0;
+
+ writel((CONFIG_PXA27X_MKP_MKP_ROWS << 26) |
+ (CONFIG_PXA27X_MKP_MKP_COLS << 23) |
+ (0xff << 13) | KPC_ME, KPC);
+ writel(CONFIG_PXA27X_MKP_DEBOUNCE, 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;
+}
--
1.7.8.3
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