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@@ -0,0 +1,572 @@
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+/*
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+ * linux/drivers/input/keyboard/pxa27x_keypad.c
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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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+
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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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+#include <linux/clk.h>
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+#include <linux/err.h>
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+
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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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+
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+#include <asm/arch/hardware.h>
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+#include <asm/arch/pxa27x_keypad.h>
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+
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+/*
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+ * Keypad Controller registers
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+ */
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+#define KPC 0x0000 /* Keypad Control register */
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+#define KPDK 0x0008 /* Keypad Direct Key register */
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+#define KPREC 0x0010 /* Keypad Rotary Encoder register */
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+#define KPMK 0x0018 /* Keypad Matrix Key register */
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+#define KPAS 0x0020 /* Keypad Automatic Scan register */
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+
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+/* Keypad Automatic Scan Multiple Key Presser register 0-3 */
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+#define KPASMKP0 0x0028
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+#define KPASMKP1 0x0030
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+#define KPASMKP2 0x0038
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+#define KPASMKP3 0x0040
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+#define KPKDI 0x0048
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+
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+/* bit definitions */
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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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+
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+#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
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+#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
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+#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
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+#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
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+
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+#define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */
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+#define KPC_MS_ALL (0xff << 13)
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+
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+#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
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+#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
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+#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
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+#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
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+#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
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+#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
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+#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
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+#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
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+#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
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+
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+#define KPDK_DKP (0x1 << 31)
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+#define KPDK_DK(n) ((n) & 0xff)
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+
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+#define KPREC_OF1 (0x1 << 31)
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+#define kPREC_UF1 (0x1 << 30)
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+#define KPREC_OF0 (0x1 << 15)
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+#define KPREC_UF0 (0x1 << 14)
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+
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+#define KPREC_RECOUNT0(n) ((n) & 0xff)
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+#define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
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+
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+#define KPMK_MKP (0x1 << 31)
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+#define KPAS_SO (0x1 << 31)
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+#define KPASMKPx_SO (0x1 << 31)
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+
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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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+
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+#define KPASMKP_MKC_MASK (0xff)
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+
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+#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
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+#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
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+
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+#define MAX_MATRIX_KEY_NUM (8 * 8)
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+
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+struct pxa27x_keypad {
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+ struct pxa27x_keypad_platform_data *pdata;
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+
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+ struct clk *clk;
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+ struct input_dev *input_dev;
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+ void __iomem *mmio_base;
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+
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+ /* matrix key code map */
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+ unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
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+
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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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+ uint32_t direct_key_state;
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+
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+ unsigned int direct_key_mask;
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+
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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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+};
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+}
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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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+
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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 = keypad_readl(KPAS);
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+
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+ num_keys_pressed = KPAS_MUKP(kpas);
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+
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+ memset(new_state, 0, sizeof(new_state));
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+
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+ if (num_keys_pressed == 0)
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+ goto scan;
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+
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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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+
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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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+
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+ new_state[col] = (1 << row);
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+ goto scan;
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+ }
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+
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+ if (num_keys_pressed > 1) {
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+ uint32_t kpasmkp0 = keypad_readl(KPASMKP0);
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+ uint32_t kpasmkp1 = keypad_readl(KPASMKP1);
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+ uint32_t kpasmkp2 = keypad_readl(KPASMKP2);
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+ uint32_t kpasmkp3 = keypad_readl(KPASMKP3);
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+
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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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+
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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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+
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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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+
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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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+
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+#define DEFAULT_KPREC (0x007f007f)
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+
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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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+
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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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+
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+ if (delta == 0)
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+ return;
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+
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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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+
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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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+
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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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+
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+ /* read and reset to default count value */
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+ kprec = keypad_readl(KPREC);
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+ keypad_writel(KPREC, DEFAULT_KPREC);
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+
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+ if (pdata->enable_rotary0)
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+ report_rotary_event(keypad, 0, rotary_delta(kprec));
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+
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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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+
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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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+
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+ kpdk = keypad_readl(KPDK);
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+
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+ if (pdata->enable_rotary0 || pdata->enable_rotary1)
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+ pxa27x_keypad_scan_rotary(keypad);
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+
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+ if (pdata->direct_key_map == NULL)
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+ return;
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+
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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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+
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+ if (bits_changed == 0)
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+ return;
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+
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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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+
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+static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
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+{
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+ struct pxa27x_keypad *keypad = dev_id;
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+ unsigned long kpc = keypad_readl(KPC);
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+
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+ if (kpc & KPC_DI)
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+ pxa27x_keypad_scan_direct(keypad);
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+
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+ if (kpc & KPC_MI)
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+ pxa27x_keypad_scan_matrix(keypad);
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+
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+ return IRQ_HANDLED;
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+}
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+
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+static void pxa27x_keypad_config(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 mask = 0, direct_key_num = 0;
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+ unsigned long kpc = 0;
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+
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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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+
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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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+
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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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+
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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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+
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+ keypad->direct_key_mask = ((2 << direct_key_num) - 1) & ~mask;
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+
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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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+
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+ keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
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+ keypad_writel(KPREC, DEFAULT_KPREC);
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+ keypad_writel(KPKDI, pdata->debounce_interval);
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+}
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+
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|
+static int pxa27x_keypad_open(struct input_dev *dev)
|
|
|
+{
|
|
|
+ struct pxa27x_keypad *keypad = input_get_drvdata(dev);
|
|
|
+
|
|
|
+ /* Enable unit clock */
|
|
|
+ clk_enable(keypad->clk);
|
|
|
+ pxa27x_keypad_config(keypad);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void pxa27x_keypad_close(struct input_dev *dev)
|
|
|
+{
|
|
|
+ struct pxa27x_keypad *keypad = input_get_drvdata(dev);
|
|
|
+
|
|
|
+ /* Disable clock unit */
|
|
|
+ clk_disable(keypad->clk);
|
|
|
+}
|
|
|
+
|
|
|
+#ifdef CONFIG_PM
|
|
|
+static int pxa27x_keypad_suspend(struct platform_device *pdev, pm_message_t state)
|
|
|
+{
|
|
|
+ struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
|
|
|
+
|
|
|
+ clk_disable(keypad->clk);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int pxa27x_keypad_resume(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
|
|
|
+ struct input_dev *input_dev = keypad->input_dev;
|
|
|
+
|
|
|
+ mutex_lock(&input_dev->mutex);
|
|
|
+
|
|
|
+ if (input_dev->users) {
|
|
|
+ /* Enable unit clock */
|
|
|
+ clk_enable(keypad->clk);
|
|
|
+ pxa27x_keypad_config(keypad);
|
|
|
+ }
|
|
|
+
|
|
|
+ mutex_unlock(&input_dev->mutex);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+#else
|
|
|
+#define pxa27x_keypad_suspend NULL
|
|
|
+#define pxa27x_keypad_resume NULL
|
|
|
+#endif
|
|
|
+
|
|
|
+#define res_size(res) ((res)->end - (res)->start + 1)
|
|
|
+
|
|
|
+static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct pxa27x_keypad *keypad;
|
|
|
+ struct input_dev *input_dev;
|
|
|
+ struct resource *res;
|
|
|
+ int irq, error;
|
|
|
+
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ irq = platform_get_irq(pdev, 0);
|
|
|
+ if (irq < 0) {
|
|
|
+ dev_err(&pdev->dev, "failed to get keypad irq\n");
|
|
|
+ error = -ENXIO;
|
|
|
+ goto failed_free;
|
|
|
+ }
|
|
|
+
|
|
|
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
+ if (res == NULL) {
|
|
|
+ dev_err(&pdev->dev, "failed to get I/O memory\n");
|
|
|
+ error = -ENXIO;
|
|
|
+ goto failed_free;
|
|
|
+ }
|
|
|
+
|
|
|
+ res = request_mem_region(res->start, res_size(res), pdev->name);
|
|
|
+ if (res == NULL) {
|
|
|
+ dev_err(&pdev->dev, "failed to request I/O memory\n");
|
|
|
+ error = -EBUSY;
|
|
|
+ goto failed_free;
|
|
|
+ }
|
|
|
+
|
|
|
+ keypad->mmio_base = ioremap(res->start, res_size(res));
|
|
|
+ if (keypad->mmio_base == NULL) {
|
|
|
+ dev_err(&pdev->dev, "failed to remap I/O memory\n");
|
|
|
+ error = -ENXIO;
|
|
|
+ goto failed_free_mem;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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_io;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Create and register the input driver. */
|
|
|
+ input_dev = input_allocate_device();
|
|
|
+ if (!input_dev) {
|
|
|
+ dev_err(&pdev->dev, "failed to allocate input device\n");
|
|
|
+ error = -ENOMEM;
|
|
|
+ goto failed_put_clk;
|
|
|
+ }
|
|
|
+
|
|
|
+ input_dev->name = pdev->name;
|
|
|
+ input_dev->id.bustype = BUS_HOST;
|
|
|
+ input_dev->open = pxa27x_keypad_open;
|
|
|
+ input_dev->close = pxa27x_keypad_close;
|
|
|
+ input_dev->dev.parent = &pdev->dev;
|
|
|
+
|
|
|
+ keypad->input_dev = input_dev;
|
|
|
+ input_set_drvdata(input_dev, keypad);
|
|
|
+
|
|
|
+ input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
|
|
|
+ BIT_MASK(EV_REL);
|
|
|
+
|
|
|
+ pxa27x_keypad_build_keycode(keypad);
|
|
|
+ platform_set_drvdata(pdev, keypad);
|
|
|
+
|
|
|
+ error = request_irq(irq, pxa27x_keypad_irq_handler, IRQF_DISABLED,
|
|
|
+ pdev->name, keypad);
|
|
|
+ if (error) {
|
|
|
+ dev_err(&pdev->dev, "failed to request IRQ\n");
|
|
|
+ goto failed_free_dev;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Register the input device */
|
|
|
+ error = input_register_device(input_dev);
|
|
|
+ if (error) {
|
|
|
+ dev_err(&pdev->dev, "failed to register input device\n");
|
|
|
+ goto failed_free_irq;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+failed_free_irq:
|
|
|
+ free_irq(irq, pdev);
|
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
|
+failed_free_dev:
|
|
|
+ input_free_device(input_dev);
|
|
|
+failed_put_clk:
|
|
|
+ clk_put(keypad->clk);
|
|
|
+failed_free_io:
|
|
|
+ iounmap(keypad->mmio_base);
|
|
|
+failed_free_mem:
|
|
|
+ release_mem_region(res->start, res_size(res));
|
|
|
+failed_free:
|
|
|
+ kfree(keypad);
|
|
|
+ return error;
|
|
|
+}
|
|
|
+
|
|
|
+static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
|
|
|
+ struct resource *res;
|
|
|
+
|
|
|
+ free_irq(platform_get_irq(pdev, 0), pdev);
|
|
|
+
|
|
|
+ clk_disable(keypad->clk);
|
|
|
+ clk_put(keypad->clk);
|
|
|
+
|
|
|
+ input_unregister_device(keypad->input_dev);
|
|
|
+ input_free_device(keypad->input_dev);
|
|
|
+
|
|
|
+ iounmap(keypad->mmio_base);
|
|
|
+
|
|
|
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
+ release_mem_region(res->start, res_size(res));
|
|
|
+
|
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
|
+ kfree(keypad);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+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,
|
|
|
+ .driver = {
|
|
|
+ .name = "pxa27x-keypad",
|
|
|
+ },
|
|
|
+};
|
|
|
+
|
|
|
+static int __init pxa27x_keypad_init(void)
|
|
|
+{
|
|
|
+ return platform_driver_register(&pxa27x_keypad_driver);
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit pxa27x_keypad_exit(void)
|
|
|
+{
|
|
|
+ platform_driver_unregister(&pxa27x_keypad_driver);
|
|
|
+}
|
|
|
+
|
|
|
+module_init(pxa27x_keypad_init);
|
|
|
+module_exit(pxa27x_keypad_exit);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("PXA27x Keypad Controller Driver");
|
|
|
+MODULE_LICENSE("GPL");
|
Dmitry Torokhov