From: Rakesh Iyer <riyer@xxxxxxxxxx> This patch adds support for the internal matrix keyboard controller for Nvidia Tegra platforms. Signed-off-by: Rakesh Iyer <riyer@xxxxxxxxxx> --- Removed NULL check before input_free_device as suggested by Jesper Juhl. arch/arm/mach-tegra/include/mach/kbc.h | 62 +++ drivers/input/keyboard/Kconfig | 10 + drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/tegra-kbc.c | 691 ++++++++++++++++++++++++++++++++ 4 files changed, 764 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-tegra/include/mach/kbc.h create mode 100644 drivers/input/keyboard/tegra-kbc.c diff --git a/arch/arm/mach-tegra/include/mach/kbc.h b/arch/arm/mach-tegra/include/mach/kbc.h new file mode 100644 index 0000000..af475f1 --- /dev/null +++ b/arch/arm/mach-tegra/include/mach/kbc.h @@ -0,0 +1,62 @@ +/* + * kbc.h + * + * Platform definitions for tegra-kbc keyboard input driver + * + * Copyright (c) 2010, NVIDIA Corporation. + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef ASMARM_ARCH_TEGRA_KBC_H +#define ASMARM_ARCH_TEGRA_KBC_H + +#include <linux/types.h> + +#ifdef CONFIG_ARCH_TEGRA_2x_SOC +#define KBC_MAX_GPIO 24 +#define KBC_MAX_KPENT 8 +#else +#define KBC_MAX_GPIO 20 +#define KBC_MAX_KPENT 7 +#endif + +#define KBC_MAX_ROW 16 +#define KBC_MAX_COL 8 + +#define KBC_MAX_KEY (KBC_MAX_ROW*KBC_MAX_COL) + +struct tegra_kbc_pin_cfg { + bool is_row; + bool is_col; + unsigned char num; +}; + +struct tegra_kbc_wake_key { + u8 row:4; + u8 col:4; +}; + +struct tegra_kbc_platform_data { + unsigned int debounce_cnt; + unsigned int repeat_cnt; + int wake_cnt; /* 0:wake on any key >1:wake on wake_cfg */ + int *plain_keycode; + int *fn_keycode; + bool wakeup; + struct tegra_kbc_pin_cfg pin_cfg[KBC_MAX_GPIO]; + struct tegra_kbc_wake_key *wake_cfg; +}; +#endif diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 9cc488d..8be47da 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -327,6 +327,16 @@ config KEYBOARD_NEWTON To compile this driver as a module, choose M here: the module will be called newtonkbd. +config KEYBOARD_TEGRA + tristate "NVIDIA Tegra internal matrix keyboard controller support" + depends on ARCH_TEGRA + help + Say Y here if you want to use a matrix keyboard connected directly + to the internal keyboard controller on Tegra SoCs. + + To compile this driver as a module, choose M here: the + module will be called tegra-kbc. + config KEYBOARD_OPENCORES tristate "OpenCores Keyboard Controller" help diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 504b591..ac0dcb9 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o +obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c new file mode 100644 index 0000000..ccbc9a2 --- /dev/null +++ b/drivers/input/keyboard/tegra-kbc.c @@ -0,0 +1,691 @@ +/* + * tegra-kbc.c + * + * Keyboard class input driver for the NVIDIA Tegra SoC internal matrix + * keyboard controller + * + * Copyright (c) 2009-2010, NVIDIA Corporation. + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/module.h> +#include <linux/input.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/clk.h> +#include <linux/slab.h> +#include <mach/clk.h> +#include <mach/kbc.h> + +#define KBC_CONTROL_0 0 +#define KBC_INT_0 4 +#define KBC_ROW_CFG0_0 8 +#define KBC_COL_CFG0_0 0x18 +#define KBC_INIT_DLY_0 0x28 +#define KBC_RPT_DLY_0 0x2c +#define KBC_KP_ENT0_0 0x30 +#define KBC_KP_ENT1_0 0x34 +#define KBC_ROW0_MASK_0 0x38 + +struct tegra_kbc { + void __iomem *mmio; + struct input_dev *idev; + int irq; + unsigned int wake_enable_rows; + unsigned int wake_enable_cols; + spinlock_t lock; + unsigned int repoll_time; + unsigned long cp_dly_jiffies; + int fifo[KBC_MAX_KPENT]; + const struct tegra_kbc_platform_data *pdata; + int *plain_keycode; + int *fn_keycode; + struct timer_list timer; + struct clk *clk; +}; + +static int plain_kbd_keycode[] = { + /* + * Row 0 Unused, Unused, 'W', 'S', 'A', 'Z', Unused, Function, + * Row 1 Unused, Unused, Unused, Unused, Unused, Unused, Unused, Menu + * Row 2 Unused, Unused, Unused, Unused, Unused, Unused, Alt, Alt2 + * Row 3 '5', '4', 'R', 'E', 'F', 'D', 'X', Unused, + * Row 4 '7', '6', 'T', 'H', 'G', 'V', 'C', SPACEBAR, + * Row 5 '9', '8', 'U', 'Y', 'J', 'N', 'B', '|\', + * Row 6 Minus, '0', 'O', 'I', 'L', 'K', '<', M, + * Row 7 Unused, '+', '}]', '#', Unused, Unused, Unused, Menu, + * Row 8 Unused, Unused, Unused, Unused, SHIFT, SHIFT, Unused, Unused, + * Row 9 Unused, Unused, Unused, Unused, Unused, Ctrl, Unused, Ctrl, + * Row A Unused, Unused, Unused, Unused, Unused, Unused, Unused, Unused, + * Row B '{[', 'P', '"', ':;', '/?, '>', Unused, Unused, + * Row C 'F10', 'F9', 'BckSpc', '3', '2', Up, Prntscr, Pause + * Row D INS, DEL, Unused, Pgup, PgDn, right, Down, Left, + * Row E F11, F12, F8, 'Q', F4, F3, '1', F7, + * Row F ESC, '~', F5, TAB, F1, F2, CAPLOCK, F6, + */ + KEY_RESERVED, KEY_RESERVED, KEY_W, KEY_S, + KEY_A, KEY_Z, KEY_RESERVED, KEY_FN, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_MENU, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RIGHTALT, KEY_LEFTALT, + KEY_5, KEY_4, KEY_R, KEY_E, + KEY_F, KEY_D, KEY_X, KEY_RESERVED, + KEY_7, KEY_6, KEY_T, KEY_H, + KEY_G, KEY_V, KEY_C, KEY_SPACE, + KEY_9, KEY_8, KEY_U, KEY_Y, + KEY_J, KEY_N, KEY_B, KEY_BACKSLASH, + KEY_MINUS, KEY_0, KEY_O, KEY_I, + KEY_L, KEY_K, KEY_COMMA, KEY_M, + KEY_RESERVED, KEY_EQUAL, KEY_RIGHTBRACE, KEY_ENTER, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_MENU, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RIGHTSHIFT, KEY_LEFTSHIFT, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RIGHTCTRL, KEY_RESERVED, KEY_LEFTCTRL, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_LEFTBRACE, KEY_P, KEY_APOSTROPHE, KEY_SEMICOLON, + KEY_SLASH, KEY_DOT, KEY_RESERVED, KEY_RESERVED, + KEY_F10, KEY_F9, KEY_BACKSPACE, KEY_3, + KEY_2, KEY_UP, KEY_PRINT, KEY_PAUSE, + KEY_INSERT, KEY_DELETE, KEY_RESERVED, KEY_PAGEUP, + KEY_PAGEDOWN, KEY_RIGHT, KEY_DOWN, KEY_LEFT, + KEY_F11, KEY_F12, KEY_F8, KEY_Q, + KEY_F4, KEY_F3, KEY_1, KEY_F7, + KEY_ESC, KEY_GRAVE, KEY_F5, KEY_TAB, + KEY_F1, KEY_F2, KEY_CAPSLOCK, KEY_F6 +}; + +static int fn_kbd_keycode[] = { + /* + * Row 0 Unused, Unused, 'W', 'S', 'A', 'Z', Unused, Function, + * Row 1 Special, Unused, Unused, Unused, Unused, Unused, Unused, Menu + * Row 2 Unused, Unused, Unused, Unused, Unused, Unused, Alt, Alt2 + * Row 3 '5', '4', 'R', 'E', 'F', 'D', 'X', Unused, + * Row 4 '7', '6', 'T', 'H', 'G', 'V', 'C', SPACEBAR, + * Row 5 '9', '8', 'U', 'Y', 'J', 'N', 'B', '|\', + * Row 6 Minus, '0', 'O', 'I', 'L', 'K', '<', M, + * Row 7 Unused, '+', '}]', '#', Unused, Unused, Unused, Menu, + * Row 8 Unused, Unused, Unused, Unused, SHIFT, SHIFT, Unused, Unused, + * Row 9 Unused, Unused, Unused, Unused, Unused, Ctrl, Unused, Control, + * Row A Unused, Unused, Unused, Unused, Unused, Unused, Unused, Unused, + * Row B '{[', 'P', '"', ':;', '/?, '>', Unused, Unused, + * Row C 'F10', 'F9', 'BckSpc', '3', '2', 'Up, Prntscr, Pause + * Row D INS, DEL, Unused, Pgup, PgDn, right, Down, Left, + * Row E F11, F12, F8, 'Q', F4, F3, '1', F7, + * Row F ESC, '~', F5, TAB, F1, F2, CAPLOCK, F6, + */ + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_7, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_9, KEY_8, KEY_4, KEY_RESERVED, + KEY_1, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_SLASH, KEY_6, KEY_5, + KEY_3, KEY_2, KEY_RESERVED, KEY_0, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_KPASTERISK, KEY_RESERVED, KEY_KPMINUS, + KEY_KPPLUS, KEY_DOT, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_VOLUMEUP, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_HOME, + KEY_END, KEY_BRIGHTNESSUP, KEY_VOLUMEDOWN, KEY_BRIGHTNESSDOWN, + KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_MUTE, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, + KEY_QUESTION, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED +}; + +static int tegra_kbc_keycode(struct tegra_kbc *kbc, int r, int c, bool fn_key) +{ + if (!fn_key) + return kbc->plain_keycode[(r * KBC_MAX_COL) + c]; + else + return kbc->fn_keycode[(r * KBC_MAX_COL) + c]; +} + +static void tegra_kbc_report_keys(struct tegra_kbc *kbc, int *fifo) +{ + int curr_fifo[KBC_MAX_KPENT]; + int rows_val[KBC_MAX_KPENT], cols_val[KBC_MAX_KPENT]; + u32 kp_ent_val[(KBC_MAX_KPENT + 3) / 4]; + u32 *kp_ents = kp_ent_val; + u32 kp_ent = 0; + unsigned long flags; + int i, j, valid = 0; + bool fn = false; + + spin_lock_irqsave(&kbc->lock, flags); + for (i = 0; i < ARRAY_SIZE(kp_ent_val); i++) + kp_ent_val[i] = readl(kbc->mmio + KBC_KP_ENT0_0 + (i*4)); + spin_unlock_irqrestore(&kbc->lock, flags); + + valid = 0; + for (i = 0; i < KBC_MAX_KPENT; i++) { + if (!(i&3)) + kp_ent = *kp_ents++; + + if (kp_ent & 0x80) { + cols_val[valid] = kp_ent & 0x7; + rows_val[valid++] = (kp_ent >> 3) & 0xf; + } + kp_ent >>= 8; + } + + for (i = 0; i < valid; i++) { + int k = tegra_kbc_keycode(kbc, rows_val[i], cols_val[i], false); + if (k == KEY_FN) { + fn = true; + break; + } + } + + j = 0; + for (i = 0; i < valid; i++) { + int k = tegra_kbc_keycode(kbc, rows_val[i], cols_val[i], fn); + if (likely(k != -1)) + curr_fifo[j++] = k; + } + valid = j; + + for (i = 0; i < KBC_MAX_KPENT; i++) { + if (fifo[i] == -1) + continue; + for (j = 0; j < valid; j++) { + if (curr_fifo[j] == fifo[i]) { + curr_fifo[j] = -1; + break; + } + } + if (j == valid) { + input_report_key(kbc->idev, fifo[i], 0); + fifo[i] = -1; + } + } + for (j = 0; j < valid; j++) { + if (curr_fifo[j] == -1) + continue; + for (i = 0; i < KBC_MAX_KPENT; i++) { + if (fifo[i] == -1) + break; + } + if (i != KBC_MAX_KPENT) { + fifo[i] = curr_fifo[j]; + input_report_key(kbc->idev, fifo[i], 1); + } else + WARN_ON(1); + } +} + +static void tegra_kbc_keypress_timer(unsigned long data) +{ + struct tegra_kbc *kbc = (struct tegra_kbc *)data; + unsigned long flags; + u32 val; + int i; + + val = (readl(kbc->mmio + KBC_INT_0) >> 4) & 0xf; + if (val) { + unsigned long dly; + + tegra_kbc_report_keys(kbc, kbc->fifo); + + dly = (val == 1) ? kbc->repoll_time : 1; + mod_timer(&kbc->timer, jiffies + msecs_to_jiffies(dly)); + } else { + /* release any pressed keys and exit the loop */ + for (i = 0; i < ARRAY_SIZE(kbc->fifo); i++) { + if (kbc->fifo[i] == -1) + continue; + input_report_key(kbc->idev, kbc->fifo[i], 0); + kbc->fifo[i] = -1; + } + + /* All keys are released so enable the keypress interrupt */ + spin_lock_irqsave(&kbc->lock, flags); + val = readl(kbc->mmio + KBC_CONTROL_0); + val |= (1<<3); + writel(val, kbc->mmio + KBC_CONTROL_0); + spin_unlock_irqrestore(&kbc->lock, flags); + } + return; +} + +static void tegra_kbc_close(struct input_dev *dev) +{ + struct tegra_kbc *kbc = input_get_drvdata(dev); + unsigned long flags; + u32 val; + + spin_lock_irqsave(&kbc->lock, flags); + val = readl(kbc->mmio + KBC_CONTROL_0); + val &= ~1; + writel(val, kbc->mmio + KBC_CONTROL_0); + spin_unlock_irqrestore(&kbc->lock, flags); + + clk_disable(kbc->clk); +} + +static void tegra_kbc_setup_wakekeys(struct tegra_kbc *kbc, bool filter) +{ + int i; + unsigned int rst_val; + + BUG_ON(kbc->pdata->wake_cnt > KBC_MAX_KEY); + rst_val = (filter && kbc->pdata->wake_cnt) ? ~0 : 0; + + for (i = 0; i < KBC_MAX_ROW; i++) + writel(rst_val, kbc->mmio+KBC_ROW0_MASK_0+i*4); + + if (filter) { + for (i = 0; i < kbc->pdata->wake_cnt; i++) { + u32 val, addr; + addr = kbc->pdata->wake_cfg[i].row*4 + KBC_ROW0_MASK_0; + val = readl(kbc->mmio + addr); + val &= ~(1<<kbc->pdata->wake_cfg[i].col); + writel(val, kbc->mmio + addr); + } + } +} + +static void tegra_kbc_config_pins(struct tegra_kbc *kbc) +{ + const struct tegra_kbc_platform_data *pdata = kbc->pdata; + int i; + + for (i = 0; i < KBC_MAX_GPIO; i++) { + u32 row_cfg, col_cfg; + u32 r_shift = 5 * (i%6); + u32 c_shift = 4 * (i%8); + u32 r_mask = 0x1f << r_shift; + u32 c_mask = 0xf << c_shift; + u32 r_offs = (i / 6) * 4 + KBC_ROW_CFG0_0; + u32 c_offs = (i / 8) * 4 + KBC_COL_CFG0_0; + + row_cfg = readl(kbc->mmio + r_offs); + col_cfg = readl(kbc->mmio + c_offs); + + row_cfg &= ~r_mask; + col_cfg &= ~c_mask; + + if (pdata->pin_cfg[i].is_row) + row_cfg |= ((pdata->pin_cfg[i].num<<1) | 1) << r_shift; + else if (pdata->pin_cfg[i].is_col) + col_cfg |= ((pdata->pin_cfg[i].num<<1) | 1) << c_shift; + + writel(row_cfg, kbc->mmio + r_offs); + writel(col_cfg, kbc->mmio + c_offs); + } +} + +static int tegra_kbc_open(struct input_dev *dev) +{ + struct tegra_kbc *kbc = input_get_drvdata(dev); + unsigned long flags; + unsigned int debounce_cnt; + u32 val = 0; + + clk_enable(kbc->clk); + + /* Reset the KBC controller to clear all previous status.*/ + tegra_periph_reset_assert(kbc->clk); + udelay(100); + tegra_periph_reset_deassert(kbc->clk); + udelay(100); + + tegra_kbc_config_pins(kbc); + tegra_kbc_setup_wakekeys(kbc, false); + + writel(kbc->pdata->repeat_cnt, kbc->mmio + KBC_RPT_DLY_0); + + debounce_cnt = min_t(unsigned int, kbc->pdata->debounce_cnt, 0x3fful); + val = debounce_cnt << 4; + val |= 1<<14; /* fifo interrupt threshold = 1 entry */ + val |= 1<<3; /* interrupt on FIFO threshold reached */ + val |= 1; /* enable */ + writel(val, kbc->mmio + KBC_CONTROL_0); + + /* Compute the delay(ns) from interrupt mode to continuous polling mode + * so the timer routine is scheduled appropriately. */ + val = readl(kbc->mmio + KBC_INIT_DLY_0); + kbc->cp_dly_jiffies = usecs_to_jiffies((val & 0xfffff) * 32); + + /* atomically clear out any remaining entries in the key FIFO + * and enable keyboard interrupts */ + spin_lock_irqsave(&kbc->lock, flags); + while (1) { + val = readl(kbc->mmio + KBC_INT_0); + val >>= 4; + if (val) { + val = readl(kbc->mmio + KBC_KP_ENT0_0); + val = readl(kbc->mmio + KBC_KP_ENT1_0); + } else { + break; + } + } + writel(0x7, kbc->mmio + KBC_INT_0); + spin_unlock_irqrestore(&kbc->lock, flags); + + return 0; +} + + +static int __devexit tegra_kbc_remove(struct platform_device *pdev) +{ + struct tegra_kbc *kbc = platform_get_drvdata(pdev); + struct resource *res; + + free_irq(kbc->irq, pdev); + del_timer_sync(&kbc->timer); + clk_disable(kbc->clk); + clk_put(kbc->clk); + + input_unregister_device(kbc->idev); + iounmap(kbc->mmio); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, resource_size(res)); + + kfree(kbc); + return 0; +} + +static irqreturn_t tegra_kbc_isr(int irq, void *args) +{ + struct tegra_kbc *kbc = args; + u32 val, ctl; + + /* until all keys are released, defer further processing to + * the polling loop in tegra_kbc_keypress_timer */ + ctl = readl(kbc->mmio + KBC_CONTROL_0); + ctl &= ~(1<<3); + writel(ctl, kbc->mmio + KBC_CONTROL_0); + + /* quickly bail out & reenable interrupts if the interrupt source + * wasn't fifo count threshold */ + val = readl(kbc->mmio + KBC_INT_0); + writel(val, kbc->mmio + KBC_INT_0); + + if (!(val & (1<<2))) { + ctl |= 1<<3; + writel(ctl, kbc->mmio + KBC_CONTROL_0); + return IRQ_HANDLED; + } + + /* Schedule timer to run when hardware is in continuous polling mode. */ + mod_timer(&kbc->timer, jiffies + kbc->cp_dly_jiffies); + return IRQ_HANDLED; +} + +static int __devinit tegra_kbc_probe(struct platform_device *pdev) +{ + struct tegra_kbc *kbc; + const struct tegra_kbc_platform_data *pdata = pdev->dev.platform_data; + struct resource *res; + int irq; + int err; + int rows[KBC_MAX_ROW]; + int cols[KBC_MAX_COL]; + int i, j; + int nr = 0; + unsigned int debounce_cnt; + + if (!pdata) + return -EINVAL; + + kbc = kzalloc(sizeof(*kbc), GFP_KERNEL); + if (!kbc) + return -ENOMEM; + + kbc->pdata = pdata; + kbc->irq = -EINVAL; + + memset(rows, 0, sizeof(rows)); + memset(cols, 0, sizeof(cols)); + + kbc->idev = input_allocate_device(); + if (!kbc->idev) { + err = -ENOMEM; + goto fail; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "failed to get I/O memory\n"); + err = -ENXIO; + goto fail; + } + res = request_mem_region(res->start, resource_size(res), pdev->name); + if (!res) { + dev_err(&pdev->dev, "failed to request I/O memory\n"); + err = -EBUSY; + goto fail; + } + kbc->mmio = ioremap(res->start, resource_size(res)); + if (!kbc->mmio) { + dev_err(&pdev->dev, "failed to remap I/O memory\n"); + err = -ENXIO; + goto fail; + } + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "failed to get keypad IRQ\n"); + err = -ENXIO; + goto fail; + } + kbc->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR_OR_NULL(kbc->clk)) { + dev_err(&pdev->dev, "failed to get keypad clock\n"); + err = (kbc->clk) ? PTR_ERR(kbc->clk) : -ENODEV; + kbc->clk = NULL; + goto fail; + } + + platform_set_drvdata(pdev, kbc); + + kbc->idev->name = pdev->name; + input_set_drvdata(kbc->idev, kbc); + kbc->idev->id.bustype = BUS_HOST; + kbc->idev->open = tegra_kbc_open; + kbc->idev->close = tegra_kbc_close; + kbc->idev->dev.parent = &pdev->dev; + spin_lock_init(&kbc->lock); + + for (i = 0; i < KBC_MAX_GPIO; i++) { + if (pdata->pin_cfg[i].is_row && pdata->pin_cfg[i].is_col) { + dev_err(&pdev->dev, "invalid pin configuration data\n"); + err = -EINVAL; + goto fail; + } + + if (pdata->pin_cfg[i].is_row) { + if (pdata->pin_cfg[i].num >= KBC_MAX_ROW) { + dev_err(&pdev->dev, "invalid row number\n"); + err = -EINVAL; + goto fail; + } + rows[pdata->pin_cfg[i].num] = 1; + nr++; + } else if (pdata->pin_cfg[i].is_col) { + if (pdata->pin_cfg[i].num >= KBC_MAX_COL) { + dev_err(&pdev->dev, "invalid column number\n"); + err = -EINVAL; + goto fail; + } + cols[pdata->pin_cfg[i].num] = 1; + } + } + kbc->wake_enable_rows = 0; + kbc->wake_enable_cols = 0; + + for (i = 0; i < pdata->wake_cnt; i++) { + kbc->wake_enable_rows |= (1 << kbc->pdata->wake_cfg[i].row); + kbc->wake_enable_cols |= (1 << kbc->pdata->wake_cfg[i].col); + } + + debounce_cnt = min_t(unsigned int, pdata->debounce_cnt, 0x3fful); + kbc->repoll_time = 5 + (16 + debounce_cnt) * nr + pdata->repeat_cnt; + kbc->repoll_time = (kbc->repoll_time + 31) / 32; + + kbc->idev->evbit[0] = BIT_MASK(EV_KEY); + + /* Override the default keycodes with the board supplied ones. */ + if (pdata->plain_keycode) { + kbc->plain_keycode = pdata->plain_keycode; + kbc->fn_keycode = pdata->fn_keycode; + } else { + kbc->plain_keycode = plain_kbd_keycode; + kbc->fn_keycode = fn_kbd_keycode; + } + + for (i = 0; i < KBC_MAX_COL; i++) { + if (!cols[i]) + continue; + for (j = 0; j < KBC_MAX_ROW; j++) { + int keycode; + + if (!rows[j]) + continue; + + /* enable all the mapped keys. */ + keycode = tegra_kbc_keycode(kbc, j, i, false); + if (keycode != -1) + set_bit(keycode, kbc->idev->keybit); + + keycode = tegra_kbc_keycode(kbc, j, i, true); + if (keycode != -1) + set_bit(keycode, kbc->idev->keybit); + } + } + + setup_timer(&kbc->timer, tegra_kbc_keypress_timer, (unsigned long)kbc); + /* Initialize the FIFO to invalid entries */ + for (i = 0; i < ARRAY_SIZE(kbc->fifo); i++) + kbc->fifo[i] = -1; + + /* keycode FIFO needs to be read atomically; leave local + * interrupts disabled when handling KBC interrupt */ + err = request_irq(irq, tegra_kbc_isr, IRQF_TRIGGER_HIGH, + pdev->name, kbc); + if (err) { + dev_err(&pdev->dev, "failed to request keypad IRQ\n"); + goto fail; + } + kbc->irq = irq; + + err = input_register_device(kbc->idev); + if (err) { + dev_err(&pdev->dev, "failed to register input device\n"); + goto fail; + } + + device_init_wakeup(&pdev->dev, pdata->wakeup); + return 0; + +fail: + input_free_device(kbc->idev); + if (kbc->irq >= 0) + free_irq(kbc->irq, pdev); + if (kbc->clk) + clk_put(kbc->clk); + if (kbc->mmio) + iounmap(kbc->mmio); + kfree(kbc); + return err; +} + +#ifdef CONFIG_PM +static int tegra_kbc_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct tegra_kbc *kbc = platform_get_drvdata(pdev); + + if (device_may_wakeup(&pdev->dev)) { + tegra_kbc_setup_wakekeys(kbc, true); + enable_irq_wake(kbc->irq); + /* Forcefully clear the interrupt status */ + writel(0x7, kbc->mmio + KBC_INT_0); + msleep(30); + } else { + mutex_lock(&kbc->idev->mutex); + tegra_kbc_close(kbc->idev); + mutex_unlock(&kbc->idev->mutex); + } + + return 0; +} + +static int tegra_kbc_resume(struct platform_device *pdev) +{ + struct tegra_kbc *kbc = platform_get_drvdata(pdev); + int err = 0; + + if (device_may_wakeup(&pdev->dev)) { + disable_irq_wake(kbc->irq); + tegra_kbc_setup_wakekeys(kbc, false); + } else if (kbc->idev->users) { + mutex_lock(&kbc->idev->mutex); + err = tegra_kbc_open(kbc->idev); + mutex_unlock(&kbc->idev->mutex); + } + + return err; +} +#endif + +static struct platform_driver tegra_kbc_driver = { + .probe = tegra_kbc_probe, + .remove = __devexit_p(tegra_kbc_remove), +#ifdef CONFIG_PM + .suspend = tegra_kbc_suspend, + .resume = tegra_kbc_resume, +#endif + .driver = { + .name = "tegra-kbc", + .owner = THIS_MODULE, + } +}; + +static void __exit tegra_kbc_exit(void) +{ + platform_driver_unregister(&tegra_kbc_driver); +} +module_exit(tegra_kbc_exit); + +static int __init tegra_kbc_init(void) +{ + return platform_driver_register(&tegra_kbc_driver); +} +module_init(tegra_kbc_init); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Rakesh Iyer <riyer@xxxxxxxxxx>"); +MODULE_DESCRIPTION("Tegra matrix keyboard controller driver"); +MODULE_ALIAS("platform:tegra-kbc"); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html