From patchwork Thu Jul 8 16:18:40 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Cox X-Patchwork-Id: 110895 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o68Gmo69013955 for ; Thu, 8 Jul 2010 16:50:22 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753792Ab0GHQrS (ORCPT ); Thu, 8 Jul 2010 12:47:18 -0400 Received: from mga02.intel.com ([134.134.136.20]:59209 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752631Ab0GHQrR (ORCPT ); Thu, 8 Jul 2010 12:47:17 -0400 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 08 Jul 2010 09:46:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,559,1272870000"; d="scan'208";a="636727802" Received: from unknown (HELO localhost.localdomain) ([10.255.13.56]) by orsmga001.jf.intel.com with ESMTP; 08 Jul 2010 09:47:17 -0700 From: Alan Cox Subject: [PATCH] intel_mid: Keypad Driver To: linux-input@vger.kernel.org, dmitry.torokhov@gmail.com Date: Thu, 08 Jul 2010 17:18:40 +0100 Message-ID: <20100708161838.6610.60143.stgit@localhost.localdomain> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Thu, 08 Jul 2010 16:52:59 +0000 (UTC) diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 77ad4ce..950f6d1 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -318,6 +318,13 @@ config KEYBOARD_IMX To compile this driver as a module, choose M here: the module will be called imx_keypad. +config KEYBOARD_INTEL_MID + tristate "Intel MID keypad support" + depends on GPIO_LANGWELL + help + Say Y if you want support for Intel MID keypad devices + depends on GPIO_LANGWELL + config KEYBOARD_NEWTON tristate "Newton keyboard" select SERIO diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index c9c457c..a1f5e9d 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_KEYBOARD_ATKBD) += atkbd.o obj-$(CONFIG_KEYBOARD_BFIN) += bf54x-keys.o obj-$(CONFIG_KEYBOARD_DAVINCI) += davinci_keyscan.o obj-$(CONFIG_KEYBOARD_EP93XX) += ep93xx_keypad.o +obj-$(CONFIG_KEYBOARD_INTEL_MID) += intel_mid_keypad.o obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o obj-$(CONFIG_KEYBOARD_TCA6416) += tca6416-keypad.o obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o diff --git a/drivers/input/keyboard/intel_mid_keypad.c b/drivers/input/keyboard/intel_mid_keypad.c new file mode 100644 index 0000000..b41d50f --- /dev/null +++ b/drivers/input/keyboard/intel_mid_keypad.c @@ -0,0 +1,781 @@ +/* + * linux/drivers/input/keyboard/intel_mid_keypad.c + * + * Driver for the matrix keypad controller on MID platform. + * + * Copyright (c) 2009 Intel Corporation. + * Created: Sep 18, 2008 + * Updated: May 14, 2010 + * + * Based on pxa27x_keypad.c by Rodolfo Giometti + * pxa27x_keypad.c is based on a previous implementation by Kevin O'Connor + * and Alex Osborne and + * on some suggestions by Nicolas Pitre + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#define DRV_NAME "mrst_keypad" +#define DRV_VERSION "0.0.1" +#define MRST_KEYPAD_DRIVER_NAME DRV_NAME " " DRV_VERSION + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Keypad Controller registers + */ +#define KPC 0x0000 /* Keypad Control register */ +#define KPDK 0x0004 /* Keypad Direct Key register */ +#define KPREC 0x0008 /* Keypad Rotary Encoder register */ +#define KPMK 0x000C /* Keypad Matrix Key register */ +#define KPAS 0x0010 /* Keypad Automatic Scan register */ + +/* Keypad Automatic Scan Multiple Key Presser register 0-3 */ +#define KPASMKP0 0x0014 +#define KPASMKP1 0x0018 +#define KPASMKP2 0x001C +#define KPASMKP3 0x0020 +#define KPKDI 0x0024 + +/* bit definitions */ +#define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */ +#define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key col number */ +#define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */ + +#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_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */ +#define KPC_MS_ALL (0xff << 13) + +#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */ +#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */ +#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */ +#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */ +#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */ +#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */ +#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 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_DK(n) ((n) & 0xff) + +#define KPREC_OF1 (0x1 << 31) +#define kPREC_UF1 (0x1 << 30) +#define KPREC_OF0 (0x1 << 15) +#define KPREC_UF0 (0x1 << 14) + +#define KPREC_RECOUNT0(n) ((n) & 0xff) +#define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff) + +#define KPMK_MKP (0x1 << 31) +#define KPAS_SO (0x1 << 31) +#define KPASMKPx_SO (0x1 << 31) + +#define KPAS_MUKP(n) (((n) >> 26) & 0x1f) +#define KPAS_RP(n) (((n) >> 4) & 0xf) +#define KPAS_CP(n) ((n) & 0xf) + +#define KPASMKP_MKC_MASK (0xff) + +#define KEYPAD_MATRIX_GPIO_IN_PIN 24 +#define KEYPAD_MATRIX_GPIO_OUT_PIN 32 +#define KEYPAD_DIRECT_GPIO_IN_PIN 40 + + +#define keypad_readl(off) readl(keypad->mmio_base + (off)) +#define keypad_writel(off, v) writel((v), keypad->mmio_base + (off)) + +#define MAX_MATRIX_KEY_NUM (8 * 8) +#define MAX_DIRECT_KEY_NUM (4) + +#define MAX_MATRIX_KEY_ROWS (8) +#define MAX_MATRIX_KEY_COLS (8) +#define DEBOUNCE_INTERVAL 100 + +#define KEY_HALFSHUTTER KEY_PROG1 +#define KEY_FULLSHUTTER KEY_CAMERA + +static unsigned int mrst_keycode[MAX_MATRIX_KEY_NUM] = { + KEY_F, KEY_D, KEY_E, KEY_GRAVE, KEY_C, KEY_R, KEY_4, KEY_V, + KEY_NUMLOCK, KEY_LEFTCTRL, KEY_Z, KEY_W, KEY_2, KEY_X, KEY_S, KEY_3, + KEY_EQUAL, KEY_N, KEY_H, KEY_U, KEY_7, KEY_M, KEY_J, KEY_8, + KEY_6, KEY_5, KEY_APOSTROPHE, KEY_G, KEY_T, KEY_SPACE, KEY_B, KEY_Y, + KEY_MINUS, KEY_0, KEY_LEFT, KEY_SEMICOLON, KEY_P, KEY_DOWN, KEY_UP, + KEY_BACKSPACE, + KEY_L, KEY_K, KEY_I, KEY_SLASH, KEY_COMMA, KEY_O, KEY_9, KEY_DOT, + KEY_Q, KEY_TAB, KEY_ESC, KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_1, KEY_FN, + KEY_A, + 0, KEY_RIGHTSHIFT, KEY_ENTER, 0, KEY_RIGHT, 0, 0, 0, +}; + +/* NumLk key mapping */ +static unsigned int mrst_keycode_numlck[MAX_MATRIX_KEY_NUM] = { + KEY_F, KEY_D, KEY_E, KEY_GRAVE, KEY_C, KEY_R, KEY_4, KEY_V, + KEY_NUMLOCK, KEY_LEFTCTRL, KEY_Z, KEY_W, KEY_2, KEY_X, KEY_S, KEY_3, + KEY_EQUAL, KEY_N, KEY_H, KEY_KP4, KEY_KP7, KEY_KP0, KEY_KP1, KEY_KP8, + KEY_6, KEY_5, KEY_APOSTROPHE, KEY_G, KEY_T, KEY_SPACE, KEY_B, KEY_Y, + KEY_MINUS, KEY_KPSLASH, KEY_LEFT, KEY_KPMINUS, KEY_KPASTERISK, + KEY_DOWN, KEY_UP, KEY_BACKSPACE, + KEY_KP3, KEY_KP2, KEY_KP5, KEY_SLASH, KEY_KPDOT, KEY_KP6, KEY_KP9, + KEY_KPPLUS, + KEY_Q, KEY_TAB, KEY_ESC, KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_1, KEY_FN, + KEY_A, + 0, KEY_RIGHTSHIFT, KEY_ENTER, 0, KEY_RIGHT, 0, 0, 0, +}; + +/* Fn key mapping */ +static unsigned int mrst_keycode_fn[MAX_MATRIX_KEY_NUM] = { + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + KEY_LEFTBRACE, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, KEY_HOME, 0, 0, KEY_PAGEDOWN, KEY_PAGEUP, 0, + 0, 0, 0, KEY_RIGHTBRACE, KEY_LEFTBRACE, 0, 0, KEY_RIGHTBRACE, + 0, 0, 0, KEY_LEFTSHIFT, 0, 0, KEY_FN, 0, + 0, KEY_RIGHTSHIFT, 0, 0, KEY_END, 0, 0, 0, +}; + +/* direct key map */ +static unsigned int mrst_direct_keycode[MAX_DIRECT_KEY_NUM] = { + KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_HALFSHUTTER, KEY_FULLSHUTTER, +}; + +struct mrst_keypad { + + struct input_dev *input_dev; + void __iomem *mmio_base; + + unsigned int matrix_key_rows; + unsigned int matrix_key_cols; + int matrix_key_map_size; + + /* key debounce interval */ + unsigned int debounce_interval; + + /* matrix key code map */ + unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM]; + + /* state row bits of each column scan */ + uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS]; + uint32_t direct_key_state; + + unsigned int direct_key_mask; + + int direct_key_num; + + unsigned int direct_key_map[MAX_DIRECT_KEY_NUM]; + + /* rotary encoders 0 */ + int enable_rotary0; + int rotary0_rel_code; + int rotary0_up_key; + int rotary0_down_key; + + /* rotary encoders 1 */ + int enable_rotary1; + int rotary1_rel_code; + int rotary1_up_key; + int rotary1_down_key; + + int rotary_rel_code[2]; + int rotary_up_key[2]; + int rotary_down_key[2]; + + /* Fn key */ + int fn; + + /* Number Lock key */ + int numlck; + + /* FIXME: + * Keypad controller likely issues fake interrupts + * when direct key status registers were first initialized + * This value assures this interrupt will not be proceeded. + */ + int count; +}; + +static void mrst_keypad_build_keycode(struct mrst_keypad *keypad) +{ + struct input_dev *input_dev = keypad->input_dev; + unsigned int *key; + int i, code; + + keypad->matrix_key_rows = MAX_MATRIX_KEY_ROWS; + keypad->matrix_key_cols = MAX_MATRIX_KEY_COLS; + keypad->matrix_key_map_size = MAX_MATRIX_KEY_NUM; + keypad->debounce_interval = DEBOUNCE_INTERVAL; + + /* three sets of keycode here */ + if (keypad->fn) + memcpy(keypad->matrix_keycodes, mrst_keycode_fn, + sizeof(keypad->matrix_keycodes)); + else if (keypad->numlck) + memcpy(keypad->matrix_keycodes, mrst_keycode_numlck, + sizeof(keypad->matrix_keycodes)); + else + memcpy(keypad->matrix_keycodes, mrst_keycode, + sizeof(keypad->matrix_keycodes)); + + memcpy(keypad->direct_key_map, mrst_direct_keycode, + sizeof(keypad->direct_key_map)); + + key = &keypad->matrix_keycodes[0]; + for (i = 0; i < MAX_MATRIX_KEY_NUM; i++, key++) { + code = (*key) & 0xffffff; + set_bit(code, input_dev->keybit); + } + + key = &keypad->direct_key_map[0]; + for (i = 0; i < MAX_DIRECT_KEY_NUM; i++, key++) { + code = (*key) & 0xffffff; + set_bit(code, input_dev->keybit); + } + + keypad->direct_key_num = MAX_DIRECT_KEY_NUM; + keypad->enable_rotary0 = 0; + keypad->enable_rotary1 = 0; + +} + +static inline unsigned int lookup_matrix_keycode( + struct mrst_keypad *keypad, int row, int col) +{ + return keypad->matrix_keycodes[(row << 3) + col]; +} + +static void handle_constant_keypress(struct mrst_keypad *keypad, + int num, int col, int row, + int state) +{ + struct input_dev *dev = keypad->input_dev; + + switch (num) { + case 0: + if (keypad->fn) + keypad->fn = 0; + /* Manually release special keys (Fn combinations) */ + if (test_bit(KEY_LEFTBRACE, dev->key)) + input_report_key(dev, KEY_LEFTBRACE, 0); + if (test_bit(KEY_RIGHTBRACE, dev->key)) + input_report_key(dev, KEY_RIGHTBRACE, 0); + if (test_bit(KEY_HOME, dev->key)) + input_report_key(dev, KEY_RIGHTBRACE, 0); + if (test_bit(KEY_END, dev->key)) + input_report_key(dev, KEY_END, 0); + if (test_bit(KEY_PAGEUP, dev->key)) + input_report_key(dev, KEY_RIGHTBRACE, 0); + if (test_bit(KEY_PAGEDOWN, dev->key)) + input_report_key(dev, KEY_RIGHTBRACE, 0); + + return; + + case 1: + /* if Fn pressed */ + if (col == 6 && row == 6) + keypad->fn = 1; + /* key '[' */ + else if ((col == 0 && row == 2) && state) { + keypad->fn = 0; + set_bit(KEY_EQUAL, dev->key); + dev->repeat_key = KEY_EQUAL; + } + /* key ']' */ + else if ((col == 3 && row == 5) && state) { + keypad->fn = 0; + set_bit(KEY_SLASH, dev->key); + dev->repeat_key = KEY_SLASH; + } + /* key '{' */ + else if ((col == 4 && row == 5) && state) { + keypad->fn = 0; + set_bit(KEY_COMMA, dev->key); + dev->repeat_key = KEY_COMMA; + } + /* key '}' */ + else if ((col == 7 && row == 5) && state) { + keypad->fn = 0; + set_bit(KEY_DOT, dev->key); + dev->repeat_key = KEY_DOT; + } + + return; + default: + ; + } +} + +static void mrst_keypad_scan_matrix(struct mrst_keypad *keypad) +{ + int row, col, num_keys_pressed = 0; + uint32_t new_state[MAX_MATRIX_KEY_COLS]; + uint32_t kpas = keypad_readl(KPAS); + int status; + + num_keys_pressed = KPAS_MUKP(kpas); + + memset(new_state, 0, sizeof(new_state)); + + if (num_keys_pressed == 0) { + status = keypad->matrix_key_state[0] & (1 << 0); + handle_constant_keypress(keypad, num_keys_pressed, 0, 0, + status); + + goto scan; + } + + if (num_keys_pressed == 1) { + col = KPAS_CP(kpas); + row = KPAS_RP(kpas); + + /* if invalid row/col, treat as no key pressed */ + if (col < MAX_MATRIX_KEY_COLS && + row < MAX_MATRIX_KEY_ROWS) { + + /* if NumLk pressed */ + if (col == 0 && row == 1) + keypad->numlck = !keypad->numlck; + + status = keypad->matrix_key_state[col] & (1 << row); + handle_constant_keypress(keypad, num_keys_pressed, col, + row, status); + + new_state[col] = (1 << row); + } + + goto scan; + } + + if (num_keys_pressed > 1) { + uint32_t kpasmkp0 = keypad_readl(KPASMKP0); + uint32_t kpasmkp1 = keypad_readl(KPASMKP1); + uint32_t kpasmkp2 = keypad_readl(KPASMKP2); + uint32_t kpasmkp3 = keypad_readl(KPASMKP3); + + new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK; + new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK; + new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK; + new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK; + new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK; + new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK; + new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK; + new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK; + + /* if Fn is pressed, all SHIFT is ignored, except when { + * or } is pressed */ + if (new_state[6] & 0x40) { + keypad->fn = 1; + new_state[3] &= ~0x40; + new_state[1] &= ~0x80; + } + + if (keypad->fn == 1) { + /* if { or } pressed */ + if ((new_state[4] & 0x20) || (new_state[7] & 0x20)) { + /* as if LEFTSHIFT is pressed */ + new_state[3] |= 0x40; + /* as if Fn not pressed */ + new_state[6] &= ~0x40; + } + /* if [ or ] pressed */ + if ((new_state[0] & 0x04) || (new_state[3] & 0x20)) + /* as if Fn not pressed */ + new_state[6] &= ~0x40; + } + } + + +scan: + /* re-build keycode */ + mrst_keypad_build_keycode(keypad); + + for (col = 0; col < keypad->matrix_key_cols; col++) { + uint32_t bits_changed; + + bits_changed = keypad->matrix_key_state[col] ^ new_state[col]; + if (bits_changed == 0) + continue; + + for (row = 0; row < keypad->matrix_key_rows; row++) { + if ((bits_changed & (1 << row)) == 0) + continue; + + input_report_key(keypad->input_dev, + lookup_matrix_keycode(keypad, row, col), + new_state[col] & (1 << row)); + } + } + input_sync(keypad->input_dev); + memcpy(keypad->matrix_key_state, new_state, sizeof(new_state)); +} + +#define DEFAULT_KPREC (0x007f007f) + +static inline int rotary_delta(uint32_t kprec) +{ + if (kprec & KPREC_OF0) + return (kprec & 0xff) + 0x7f; + else if (kprec & KPREC_UF0) + return (kprec & 0xff) - 0x7f - 0xff; + else + return (kprec & 0xff) - 0x7f; +} + +static void report_rotary_event(struct mrst_keypad *keypad, int r, int delta) +{ + struct input_dev *dev = keypad->input_dev; + + if (delta == 0) + return; + + if (keypad->rotary_up_key[r] && keypad->rotary_down_key[r]) { + int keycode = (delta > 0) ? keypad->rotary_up_key[r] : + keypad->rotary_down_key[r]; + + /* simulate a press-n-release */ + input_report_key(dev, keycode, 1); + input_sync(dev); + input_report_key(dev, keycode, 0); + input_sync(dev); + } else { + input_report_rel(dev, keypad->rotary_rel_code[r], delta); + input_sync(dev); + } +} + +static void mrst_keypad_scan_rotary(struct mrst_keypad *keypad) +{ + unsigned int kprec; + + /* read and reset to default count value */ + kprec = keypad_readl(KPREC); + keypad_writel(KPREC, DEFAULT_KPREC); + + if (keypad->enable_rotary0) + report_rotary_event(keypad, 0, rotary_delta(kprec)); + + if (keypad->enable_rotary1) + report_rotary_event(keypad, 1, rotary_delta(kprec >> 16)); +} + +static void mrst_keypad_scan_direct(struct mrst_keypad *keypad) +{ + unsigned int new_state; + uint32_t kpdk, bits_changed; + int i; + + kpdk = keypad_readl(KPDK); + + if (keypad->enable_rotary0 || keypad->enable_rotary1) + mrst_keypad_scan_rotary(keypad); + + if ((keypad->direct_key_map == NULL) || (++keypad->count == 1)) { + keypad->direct_key_state = 0; + return; + } + + new_state = KPDK_DK(kpdk) & keypad->direct_key_mask; + new_state = ~new_state; + bits_changed = keypad->direct_key_state ^ new_state; + + if (bits_changed == 0) + return; + + for (i = 0; i < keypad->direct_key_num; i++) { + if (bits_changed & (1 << i)) { + input_report_key(keypad->input_dev, + keypad->direct_key_map[i], + (new_state & (1 << i))); + } + } + input_sync(keypad->input_dev); + keypad->direct_key_state = new_state; + +} + +static irqreturn_t mrst_keypad_irq_handler(int irq, void *dev_id) +{ + struct mrst_keypad *keypad = dev_id; + unsigned long kpc = keypad_readl(KPC); + + if (kpc & KPC_DI) + mrst_keypad_scan_direct(keypad); + + if (kpc & KPC_MI) + mrst_keypad_scan_matrix(keypad); + + return IRQ_HANDLED; +} + +static int mrst_keypad_gpio_init(void) +{ + int i, err, cnt = 0; + int pins = KEYPAD_MATRIX_GPIO_IN_PIN + MAX_MATRIX_KEY_ROWS + + MAX_MATRIX_KEY_COLS + MAX_DIRECT_KEY_NUM; + + /* explicitely tell which pins have been occupied... */ + for (i = KEYPAD_MATRIX_GPIO_IN_PIN; i < pins; i++, cnt++) { + err = gpio_request(i, NULL); + if (err) { + printk(KERN_ERR "GPIO pin %d failed to request.\n", i); + goto err_request; + } + } + + for (i = 0; i < MAX_MATRIX_KEY_ROWS; i++) + gpio_direction_input(KEYPAD_MATRIX_GPIO_IN_PIN + i); + + for (i = 0; i < MAX_MATRIX_KEY_COLS; i++) + /* __gpio_set_value(KEYPAD_GPIO_OUT_PIN + i, 1); */ + /* set action is executed in gpio_direction_output() */ + gpio_direction_output(KEYPAD_MATRIX_GPIO_OUT_PIN + i, 1); + + for (i = 0; i < MAX_DIRECT_KEY_NUM; i++) + gpio_direction_input(KEYPAD_DIRECT_GPIO_IN_PIN + i); + + return 0; + +err_request: + /* free requested pins... */ + for (i = KEYPAD_MATRIX_GPIO_IN_PIN + cnt - 1; + i >= KEYPAD_MATRIX_GPIO_IN_PIN; i--) + gpio_free(i); + return err; +} + +static void mrst_keypad_config(struct mrst_keypad *keypad) +{ + unsigned int mask = 0, direct_key_num = 0; + unsigned long kpc = 0; + + /* enable matrix keys with automatic scan */ + if (keypad->matrix_key_rows && keypad->matrix_key_cols) { + kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL; + kpc |= KPC_MKRN(keypad->matrix_key_rows) | + KPC_MKCN(keypad->matrix_key_cols); + } + + /* enable rotary key, debounce interval same as direct keys */ + if (keypad->enable_rotary0) { + mask |= 0x03; + direct_key_num = 2; + kpc |= KPC_REE0; + } + + if (keypad->enable_rotary1) { + mask |= 0x0c; + direct_key_num = 4; + kpc |= KPC_REE1; + } + + if (keypad->direct_key_num > direct_key_num) + direct_key_num = keypad->direct_key_num; + + keypad->direct_key_mask = ((2 << direct_key_num) - 1) & ~mask; + + /* enable direct key */ + if (direct_key_num) + kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num); + + keypad_writel(KPC, kpc); + keypad_writel(KPREC, DEFAULT_KPREC); + keypad_writel(KPKDI, keypad->debounce_interval); +} + +static int mrst_keypad_open(struct input_dev *dev) +{ + struct mrst_keypad *keypad = input_get_drvdata(dev); + int err; + + err = mrst_keypad_gpio_init(); + if (err) + return err; + mrst_keypad_config(keypad); + + return 0; +} + +static void mrst_keypad_close(struct input_dev *dev) +{ + int pins = KEYPAD_MATRIX_GPIO_IN_PIN + MAX_MATRIX_KEY_ROWS + + MAX_MATRIX_KEY_COLS + MAX_DIRECT_KEY_NUM; + + int i; + /* free occupied pins */ + for (i = KEYPAD_MATRIX_GPIO_IN_PIN; i < pins; i++) + gpio_free(i); +} + +static int __devinit mrst_keypad_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct mrst_keypad *keypad; + struct input_dev *input_dev; + int error; + +#ifndef MODULE + printk(KERN_INFO MRST_KEYPAD_DRIVER_NAME "\n"); +#endif + + keypad = kzalloc(sizeof(struct mrst_keypad), GFP_KERNEL); + if (keypad == NULL) { + dev_err(&pdev->dev, "failed to allocate driver data\n"); + return -ENOMEM; + } + + error = pci_enable_device(pdev); + if (error || (pdev->irq < 0)) { + dev_err(&pdev->dev, "failed to enable device/get irq\n"); + error = -ENXIO; + goto failed_free; + } + + error = pci_request_regions(pdev, DRV_NAME); + if (error) { + dev_err(&pdev->dev, "failed to request I/O memory\n"); + goto failed_free; + } + + keypad->mmio_base = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (keypad->mmio_base == NULL) { + dev_err(&pdev->dev, "failed to remap I/O memory\n"); + error = -ENXIO; + goto failed_free_mem; + } + + /* 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_free_io; + } + + input_dev->name = pci_name(pdev); + input_dev->id.bustype = BUS_PCI; + input_dev->open = mrst_keypad_open; + input_dev->close = mrst_keypad_close; + input_dev->dev.parent = &pdev->dev; + + input_dev->keycode = keypad->matrix_keycodes; + input_dev->keycodesize = sizeof(unsigned int); + input_dev->keycodemax = ARRAY_SIZE(mrst_keycode); + + keypad->input_dev = input_dev; + keypad->fn = 0; + keypad->numlck = 0; + /*FIXME*/keypad->count = 0; + input_set_drvdata(input_dev, keypad); + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | + BIT_MASK(EV_REL); + + mrst_keypad_build_keycode(keypad); + pci_set_drvdata(pdev, keypad); + + error = request_irq(pdev->irq, mrst_keypad_irq_handler, IRQF_SHARED, + pci_name(pdev), 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; + } + + printk(KERN_INFO "*** keypad driver load successfully ***\n"); + return 0; + +failed_free_irq: + free_irq(pdev->irq, keypad); + pci_set_drvdata(pdev, NULL); +failed_free_dev: + input_free_device(input_dev); +failed_free_io: + iounmap(keypad->mmio_base); +failed_free_mem: + pci_release_regions(pdev); +failed_free: + kfree(keypad); + return error; +} + +static void __devexit mrst_keypad_remove(struct pci_dev *pdev) +{ + struct mrst_keypad *keypad = pci_get_drvdata(pdev); + int i; + int pins = KEYPAD_MATRIX_GPIO_IN_PIN + MAX_MATRIX_KEY_ROWS + + MAX_MATRIX_KEY_COLS + MAX_DIRECT_KEY_NUM; + + for (i = pins - 1; i > KEYPAD_MATRIX_GPIO_IN_PIN; i--) + gpio_free(i); + + free_irq(pdev->irq, keypad); + input_unregister_device(keypad->input_dev); + iounmap(keypad->mmio_base); + pci_release_regions(pdev); + pci_set_drvdata(pdev, NULL); + kfree(keypad); +} + +static struct pci_device_id keypad_pci_tbl[] = { + {0x8086, 0x0805, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + {0,} +}; +MODULE_DEVICE_TABLE(pci, keypad_pci_tbl); + +static struct pci_driver mrst_keypad_driver = { + .name = DRV_NAME, + .id_table = keypad_pci_tbl, + .probe = mrst_keypad_probe, + .remove = __devexit_p(mrst_keypad_remove), +#ifdef CONFIG_PM + .suspend = NULL, + .resume = NULL, +#endif /* CONFIG_PM */ +}; + +static int __init mrst_keypad_init(void) +{ + return pci_register_driver(&mrst_keypad_driver); +} + +static void __exit mrst_keypad_exit(void) +{ + pci_unregister_driver(&mrst_keypad_driver); +} + +module_init(mrst_keypad_init); +module_exit(mrst_keypad_exit); + +MODULE_DESCRIPTION("MRST Keypad Controller Driver"); +MODULE_LICENSE("GPL v2");