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Message #01099
[PATCH 1/3] ARM: tegra: add nvec driver
Adopted version of nvec driver from linux kernel with
keyboard support only.
Signed-off-by: Andrey Danin <danindrey@xxxxxxx>
---
arch/arm/include/asm/arch-tegra/tegra_nvec.h | 117 +++++
.../arm/include/asm/arch-tegra/tegra_nvec_events.h | 31 ++
.../include/asm/arch-tegra/tegra_nvec_keyboard.h | 36 ++
.../include/asm/arch-tegra/tegra_nvec_keytable.h | 313 +++++++++++++
board/nvidia/common/board.c | 12 +
drivers/i2c/Makefile | 1 +
drivers/i2c/tegra_nvec.c | 462 ++++++++++++++++++++
drivers/i2c/tegra_nvec_keyboard.c | 108 +++++
include/fdtdec.h | 1 +
lib/Makefile | 1 +
lib/fdtdec.c | 1 +
11 files changed, 1083 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/include/asm/arch-tegra/tegra_nvec.h
create mode 100644 arch/arm/include/asm/arch-tegra/tegra_nvec_events.h
create mode 100644 arch/arm/include/asm/arch-tegra/tegra_nvec_keyboard.h
create mode 100644 arch/arm/include/asm/arch-tegra/tegra_nvec_keytable.h
create mode 100644 drivers/i2c/tegra_nvec.c
create mode 100644 drivers/i2c/tegra_nvec_keyboard.c
diff --git a/arch/arm/include/asm/arch-tegra/tegra_nvec.h b/arch/arm/include/asm/arch-tegra/tegra_nvec.h
new file mode 100644
index 0000000..1c30028
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/tegra_nvec.h
@@ -0,0 +1,117 @@
+/*
+ * (C) Copyright 2013
+ * Andrey Danin <andreydanin@xxxxxxx>
+ *
+ * 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
+ */
+
+#ifndef _TEGRA_NVEC_H_
+#define _TEGRA_NVEC_H_
+
+#define I2C_CNFG 0x00
+#define I2C_CNFG_PACKET_MODE_EN (1<<10)
+#define I2C_CNFG_NEW_MASTER_SFM (1<<11)
+#define I2C_CNFG_DEBOUNCE_CNT_SHIFT 12
+
+#define I2C_SL_CNFG 0x20
+#define I2C_SL_NEWSL (1<<2)
+#define I2C_SL_NACK (1<<1)
+#define I2C_SL_RESP (1<<0)
+#define I2C_SL_IRQ (1<<3)
+#define END_TRANS (1<<4)
+#define RCVD (1<<2)
+#define RNW (1<<1)
+
+#define I2C_SL_RCVD 0x24
+#define I2C_SL_STATUS 0x28
+#define I2C_SL_ADDR1 0x2c
+#define I2C_SL_ADDR2 0x30
+#define I2C_SL_DELAY_COUNT 0x3c
+
+
+enum nvec_msg_type {
+ NVEC_KEYBOARD = 0,
+ NVEC_SYS = 1,
+ NVEC_BAT,
+ NVEC_GPIO,
+ NVEC_SLEEP,
+ NVEC_KBD,
+ NVEC_PS2,
+ NVEC_CNTL,
+ NVEC_OEM0 = 0x0d,
+ NVEC_KB_EVT = 0x80,
+ NVEC_PS2_EVT,
+};
+
+enum nvec_event_size {
+ NVEC_2BYTES,
+ NVEC_3BYTES,
+ NVEC_VAR_SIZE,
+};
+
+enum sys_subcmds {
+ SYS_GET_STATUS,
+ SYS_CNFG_EVENT_REPORTING,
+ SYS_ACK_STATUS,
+ SYS_CNFG_WAKE = 0xfd,
+};
+
+enum kbd_subcmds {
+ CNFG_WAKE = 3,
+ CNFG_WAKE_KEY_REPORTING,
+ SET_LEDS = 0xed,
+ ENABLE_KBD = 0xf4,
+ DISABLE_KBD,
+};
+
+enum cntl_subcmds {
+ CNTL_RESET_EC = 0x00,
+ CNTL_SELF_TEST = 0x01,
+ CNTL_NOOP = 0x02,
+ CNTL_GET_EC_SPEC_VER = 0x10,
+ CNTL_GET_FIRMWARE_VERSION = 0x15,
+};
+
+enum nvec_sleep_subcmds {
+ GLOBAL_EVENTS,
+ AP_PWR_DOWN,
+ AP_SUSPEND,
+};
+
+#define MOUSE_SEND_CMD 0x01
+#define MOUSE_RESET 0xff
+
+
+int board_nvec_init(void);
+
+int nvec_msg_is_event(const unsigned char *msg);
+int nvec_msg_event_type(const unsigned char *msg);
+
+/**
+ * Send request and read response. If write or read failed
+ * operation will be repeated NVEC_ATTEMPTS_MAX times.
+ *
+ * @param buf request data
+ * @param size request data size
+ * @return 0 if ok, -1 on error
+ */
+int nvec_do_request(char *buf, int size);
+
+
+#endif /* _TEGRA_NVEC_H_ */
diff --git a/arch/arm/include/asm/arch-tegra/tegra_nvec_events.h b/arch/arm/include/asm/arch-tegra/tegra_nvec_events.h
new file mode 100644
index 0000000..7d65921
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/tegra_nvec_events.h
@@ -0,0 +1,31 @@
+/*
+ * (C) Copyright 2013
+ * Andrey Danin <andreydanin@xxxxxxx>
+ *
+ * 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
+ */
+
+#ifndef _TEGRA_NVEC_EVENTS_H_
+#define _TEGRA_NVEC_EVENTS_H_
+
+
+int nvec_read_events(void);
+
+
+#endif /* _TEGRA_NVEC_EVENTS_H_ */
diff --git a/arch/arm/include/asm/arch-tegra/tegra_nvec_keyboard.h b/arch/arm/include/asm/arch-tegra/tegra_nvec_keyboard.h
new file mode 100644
index 0000000..b25a1d8
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/tegra_nvec_keyboard.h
@@ -0,0 +1,36 @@
+/*
+ * (C) Copyright 2013
+ * Andrey Danin <andreydanin@xxxxxxx>
+ *
+ * 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
+ */
+
+#ifndef _TEGRA_NVEC_KEYBOARD_H_
+#define _TEGRA_NVEC_KEYBOARD_H_
+
+
+#define NVEC_KEYS_QUEUE_SIZE 256
+
+void nvec_enable_kbd_events(void);
+void nvec_process_keyboard_msg(const unsigned char *msg);
+int nvec_pop_key(void);
+int nvec_have_keys(void);
+
+
+#endif /* _TEGRA_NVEC_KEYBOARD_H_ */
diff --git a/arch/arm/include/asm/arch-tegra/tegra_nvec_keytable.h b/arch/arm/include/asm/arch-tegra/tegra_nvec_keytable.h
new file mode 100644
index 0000000..8fbf96c
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/tegra_nvec_keytable.h
@@ -0,0 +1,313 @@
+/*
+ * Keyboard class input driver for keyboards connected to an NvEc compliant
+ * embedded controller
+ *
+ * Copyright (c) 2009, 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 _TEGRA_NVEC_KEYTABLE_H_
+#define _TEGRA_NVEC_KEYTABLE_H_
+
+#include <linux/input.h>
+
+
+static unsigned short code_tab_102us[] = {
+ /* 0x00 */
+ KEY_GRAVE,
+ KEY_ESC,
+ KEY_1,
+ KEY_2,
+ KEY_3,
+ KEY_4,
+ KEY_5,
+ KEY_6,
+ KEY_7,
+ KEY_8,
+ KEY_9,
+ KEY_0,
+ KEY_MINUS,
+ KEY_EQUAL,
+ KEY_BACKSPACE,
+ KEY_TAB,
+ /* 0x10 */
+ KEY_Q,
+ KEY_W,
+ KEY_E,
+ KEY_R,
+ KEY_T,
+ KEY_Y,
+ KEY_U,
+ KEY_I,
+ KEY_O,
+ KEY_P,
+ KEY_LEFTBRACE,
+ KEY_RIGHTBRACE,
+ KEY_ENTER,
+ KEY_LEFTCTRL,
+ KEY_A,
+ KEY_S,
+ /* 0x20 */
+ KEY_D,
+ KEY_F,
+ KEY_G,
+ KEY_H,
+ KEY_J,
+ KEY_K,
+ KEY_L,
+ KEY_SEMICOLON,
+ KEY_APOSTROPHE,
+ KEY_GRAVE,
+ KEY_LEFTSHIFT,
+ KEY_BACKSLASH,
+ KEY_Z,
+ KEY_X,
+ KEY_C,
+ KEY_V,
+ /* 0x30 */
+ KEY_B,
+ KEY_N,
+ KEY_M,
+ KEY_COMMA,
+ KEY_DOT,
+ KEY_SLASH,
+ KEY_RIGHTSHIFT,
+ KEY_KPASTERISK,
+ KEY_LEFTALT,
+ KEY_SPACE,
+ KEY_CAPSLOCK,
+ KEY_F1,
+ KEY_F2,
+ KEY_F3,
+ KEY_F4,
+ KEY_F5,
+ /* 0x40 */
+ KEY_F6,
+ KEY_F7,
+ KEY_F8,
+ KEY_F9,
+ KEY_F10,
+ KEY_FN,
+ /* VK_SCROLL */
+ 0,
+ KEY_KP7,
+ KEY_KP8,
+ KEY_KP9,
+ KEY_KPMINUS,
+ KEY_KP4,
+ KEY_KP5,
+ KEY_KP6,
+ KEY_KPPLUS,
+ KEY_KP1,
+ /* 0x50 */
+ KEY_KP2,
+ KEY_KP3,
+ KEY_KP0,
+ KEY_KPDOT,
+ /* VK_SNAPSHOT */
+ 0, /* KEY_MENU, */
+ KEY_POWER,
+ /* VK_OEM_102 */
+ KEY_102ND,
+ KEY_F11,
+ KEY_F12,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* 0x60 */
+ 0,
+ 0,
+ 0,
+ 0, /* KEY_SEARCH, */
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* 0x70 */
+ 0,
+ 0,
+ 0,
+ KEY_KP5,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ KEY_KP9,
+};
+
+static unsigned short extcode_tab_us102[] = {
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* 0x10 */
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* VK_MEDIA_NEXT_TRACK */
+ 0,
+ 0,
+ 0,
+ /* VK_RETURN */
+ 0,
+ KEY_RIGHTCTRL,
+ 0,
+ 0,
+ /* 0x20 */
+ KEY_MUTE,
+ /* VK_LAUNCH_APP1 */
+ 0,
+ /* VK_MEDIA_PLAY_PAUSE */
+ 0,
+ 0,
+ /* VK_MEDIA_STOP */
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* 0x30 */
+ KEY_VOLUMEUP,
+ 0,
+ /* VK_BROWSER_HOME */
+ 0,
+ 0,
+ 0,
+ /* VK_DIVIDE */
+ KEY_KPSLASH,
+ 0,
+ /* VK_SNAPSHOT */
+ KEY_SYSRQ,
+ /* VK_RMENU */
+ KEY_RIGHTALT,
+ /* VK_OEM_NV_BACKLIGHT_UP */
+ 0,
+ /* VK_OEM_NV_BACKLIGHT_DN */
+ 0,
+ /* VK_OEM_NV_BACKLIGHT_AUTOTOGGLE */
+ 0,
+ /* VK_OEM_NV_POWER_INFO */
+ 0,
+ /* VK_OEM_NV_WIFI_TOGGLE */
+ 0,
+ /* VK_OEM_NV_DISPLAY_SELECT */
+ 0,
+ /* VK_OEM_NV_AIRPLANE_TOGGLE */
+ 0,
+ /* 0x40 */
+ 0,
+ KEY_LEFT,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0, /* KEY_CANCEL, */
+ KEY_HOME,
+ KEY_UP,
+ KEY_PAGEUP,
+ 0,
+ KEY_LEFT,
+ 0,
+ KEY_RIGHT,
+ 0,
+ KEY_END,
+ /* 0x50 */
+ KEY_DOWN,
+ KEY_PAGEDOWN,
+ KEY_INSERT,
+ KEY_DELETE,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ KEY_LEFTMETA,
+ 0,
+ KEY_ESC,
+ KEY_KPMINUS,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* VK_BROWSER_SEARCH */
+ 0,
+ /* VK_BROWSER_FAVORITES */
+ 0,
+ /* VK_BROWSER_REFRESH */
+ 0,
+ /* VK_BROWSER_STOP */
+ 0,
+ /* VK_BROWSER_FORWARD */
+ 0,
+ /* VK_BROWSER_BACK */
+ 0,
+ /* VK_LAUNCH_APP2 */
+ 0,
+ /* VK_LAUNCH_MAIL */
+ 0,
+ /* VK_LAUNCH_MEDIA_SELECT */
+ 0,
+};
+
+static unsigned short *code_tabs[] = { code_tab_102us, extcode_tab_us102 };
+
+#endif /* _TEGRA_NVEC_KEYTABLE_H_ */
diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index f60f21f..e5da061 100644
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -53,6 +53,9 @@
#include <asm/arch-tegra/tegra_mmc.h>
#include <asm/arch-tegra/mmc.h>
#endif
+#ifdef CONFIG_TEGRA_NVEC
+#include <asm/arch-tegra/tegra_nvec.h>
+#endif
#include <i2c.h>
#include <spi.h>
#include "emc.h"
@@ -217,10 +220,19 @@ int board_early_init_f(void)
int board_late_init(void)
{
+ __maybe_unused int err;
+
#ifdef CONFIG_LCD
/* Make sure we finish initing the LCD */
tegra_lcd_check_next_stage(gd->fdt_blob, 1);
#endif
+
+#ifdef CONFIG_TEGRA_NVEC
+ err = board_nvec_init();
+ if (err)
+ debug("NVEC controller init failed: %d\n", err);
+#endif
+
return 0;
}
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index 72e85a3..6ff3b22 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -42,6 +42,7 @@ COBJS-$(CONFIG_DRIVER_S3C24X0_I2C) += s3c24x0_i2c.o
COBJS-$(CONFIG_S3C44B0_I2C) += s3c44b0_i2c.o
COBJS-$(CONFIG_SOFT_I2C) += soft_i2c.o
COBJS-$(CONFIG_TEGRA_I2C) += tegra_i2c.o
+COBJS-$(CONFIG_TEGRA_NVEC) += tegra_nvec.o tegra_nvec_keyboard.o
COBJS-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
COBJS-$(CONFIG_U8500_I2C) += u8500_i2c.o
COBJS-$(CONFIG_SH_I2C) += sh_i2c.o
diff --git a/drivers/i2c/tegra_nvec.c b/drivers/i2c/tegra_nvec.c
new file mode 100644
index 0000000..1589003
--- /dev/null
+++ b/drivers/i2c/tegra_nvec.c
@@ -0,0 +1,462 @@
+/*
+ * (C) Copyright 2013
+ * Andrey Danin <andreydanin@xxxxxxx>
+ *
+ * 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 <fdtdec.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch-tegra/tegra_nvec.h>
+#include <asm/arch-tegra/tegra_nvec_keyboard.h>
+
+#ifndef CONFIG_TEGRA_NVEC
+#error "You should enable CONFIG_TEGRA_NVEC"
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+
+/* Nvec perfroms io interval is beteween 20 and 500 ms,
+no response in 600 ms means error */
+enum {
+ NVEC_TIMEOUT_MIN = 20,
+ NVEC_TIMEOUT_MAX = 600,
+};
+enum {
+ NVEC_WAIT_FOR_EC = 1,
+ NVEC_DONT_WAIT_FOR_EC = 0,
+ NVEC_ATTEMPTS_MAX = 10,
+};
+
+enum {
+ nvec_io_error = -1,
+ nvec_io_timeout,
+ nvec_io_read_ok,
+ nvec_io_write_ok,
+ nvec_io_not_ready,
+ nvec_io_retry,
+};
+
+enum {
+ NVST_BEGIN = 0,
+ NVST_CMD = 1,
+ NVST_SUBCMD = 2,
+ NVST_READ = 3,
+ NVST_WRITE_SIZE = 4,
+ NVST_WRITE = 5,
+};
+
+struct nvec_t {
+ int gpio;
+ int i2c_addr;
+ int i2c_clk;
+ void __iomem *base;
+ int state;
+ char rx_buf[34];
+ int rx_pos;
+ char *tx_buf;
+ int tx_pos;
+ int tx_size;
+} nvec_data;
+
+struct fdt_nvec_config {
+ int gpio;
+ int i2c_addr;
+ int i2c_clk;
+ fdt_addr_t base_addr;
+ struct fdt_gpio_state request_gpio;
+};
+
+
+/* nvec commands */
+char noop[] = { NVEC_CNTL, CNTL_NOOP };
+
+
+int nvec_msg_is_event(const unsigned char *msg)
+{
+ return msg[0] >> 7;
+}
+
+
+int nvec_msg_event_type(const unsigned char *msg)
+{
+ return msg[0] & 0x0f;
+}
+
+
+/**
+ * Process incoming io message.
+ * If message is keyboard event then key code will
+ * be added to keys buffer.
+ *
+ * See: nvec_push_key, nvec_pop_key, nvec_have_key
+ *
+ * @param nvec nvec state struct
+ */
+void nvec_process_msg(struct nvec_t *nvec)
+{
+ const unsigned char *msg = (const unsigned char *)nvec->rx_buf;
+ int event_type;
+
+ if (!nvec_msg_is_event(msg))
+ return;
+
+ event_type = nvec_msg_event_type(msg);
+ if (event_type == NVEC_KEYBOARD)
+ nvec_process_keyboard_msg(msg);
+}
+
+
+static inline int is_read(unsigned long status)
+{
+ return (status & RNW) == 0;
+}
+
+
+static inline int is_ready(unsigned long status)
+{
+ return status & I2C_SL_IRQ;
+}
+
+
+/**
+ * Perform complete io operation (read or write).
+ * NOTE: function will wait NVEC_TIMEOUT_MIN (20ms)
+ * before status check to avoid nvec hang.
+ *
+ * @param nvec nvec state struct
+ * @param wait_for_ec if 1(NVEC_WAIT_FOR_EC) operation
+ * timeout is NVEC_TIMEOUT_MAX (600ms),
+ * otherwise function will return if io
+ * is not ready.
+ *
+ * @return nvec_io_* code
+ */
+int nvec_do_io(struct nvec_t *nvec, int wait_for_ec)
+{
+ unsigned int poll_start_ms = 0;
+ unsigned long status;
+ unsigned int received = 0;
+ unsigned int to_send = 0;
+ unsigned int timeout_ms = NVEC_TIMEOUT_MAX;
+ int is_first_iteration = 1;
+
+ poll_start_ms = get_timer(0);
+ mdelay(NVEC_TIMEOUT_MIN);
+
+ while (1) {
+ status = readl(nvec->base + I2C_SL_STATUS);
+ if (!is_ready(status)) {
+ if (is_first_iteration && !wait_for_ec)
+ return nvec_io_not_ready;
+
+ if (get_timer(poll_start_ms) > timeout_ms)
+ return nvec_io_timeout;
+
+ is_first_iteration = 0;
+ udelay(100);
+ continue;
+ }
+ is_first_iteration = 0;
+
+ if (is_read(status))
+ received = readl(nvec->base + I2C_SL_RCVD);
+
+ if (status == (I2C_SL_IRQ | RCVD)) {
+ nvec->state = NVST_BEGIN;
+ nvec->rx_pos = 0;
+ nvec->tx_pos = 0;
+ }
+
+ switch (nvec->state) {
+ case NVST_BEGIN:
+ nvec->rx_pos = 0;
+ nvec->tx_pos = 0;
+ if (received != nvec->i2c_addr) {
+ error("NVEC io: unknown addr 0x%x\n", received);
+ return nvec_io_error;
+ }
+ nvec->state = NVST_CMD;
+ break;
+
+ case NVST_CMD:
+ nvec->rx_buf[nvec->rx_pos++] = (char)received;
+ nvec->state = NVST_SUBCMD;
+ break;
+
+ case NVST_SUBCMD:
+ if (status == (I2C_SL_IRQ | RNW | RCVD)) {
+ if (nvec->rx_buf[0] != 0x01) {
+ error("NVEC io: wrong read\n");
+ nvec->state = NVST_BEGIN;
+ return nvec_io_error;
+ }
+ nvec->state = NVST_WRITE;
+ if (nvec->tx_buf == 0) {
+ debug("NVEC io: error, tx buffer is 0\n");
+ nvec->tx_buf = noop;
+ nvec->tx_size = 2;
+ nvec->tx_pos = 0;
+ }
+ to_send = nvec->tx_size;
+ writel(to_send, nvec->base + I2C_SL_RCVD);
+ gpio_set_value(nvec_data.gpio, 1);
+ nvec->state = NVST_WRITE;
+ } else {
+ nvec->state = NVST_READ;
+ nvec->rx_buf[nvec->rx_pos] = (char)received;
+ ++nvec->rx_pos;
+ }
+ break;
+
+ case NVST_READ:
+ if (nvec->rx_pos >= 34) {
+ error("NVEC io: read buffer is full\n");
+ break;
+ }
+ nvec->rx_buf[nvec->rx_pos++] = (char)received;
+ if (status & END_TRANS) {
+ nvec_process_msg(nvec);
+ nvec->rx_pos = 0;
+ return nvec_io_read_ok;
+ }
+ break;
+
+ case NVST_WRITE_SIZE:
+ to_send = nvec->tx_size;
+ writel(to_send, nvec->base + I2C_SL_RCVD);
+ nvec->state = NVST_WRITE;
+ break;
+
+ case NVST_WRITE:
+ if (nvec->tx_pos >= nvec->tx_size) {
+ if (status & END_TRANS)
+ return nvec_io_write_ok;
+
+ error("NVEC io: no data to write\n");
+ return nvec_io_error;
+ }
+ to_send = nvec->tx_buf[nvec->tx_pos++];
+ writel(to_send, nvec->base + I2C_SL_RCVD);
+ if (status & END_TRANS) {
+ nvec->tx_pos = 0;
+ nvec->tx_buf = 0;
+ return nvec_io_write_ok;
+ }
+
+ break;
+
+ default:
+ error("NVEC io: unknown state\n");
+ break;
+ }
+ if (status & END_TRANS)
+ return nvec_io_retry;
+ }
+}
+
+
+/**
+ * Send request and read response. If write or read failed
+ * operation will be repeated NVEC_ATTEMPTS_MAX times.
+ *
+ * @param buf request data
+ * @param size request data size
+ * @return 0 if ok, -1 on error
+ */
+int nvec_do_request(char *buf, int size)
+{
+ int res = 0;
+ int i = 0;
+
+ nvec_data.tx_buf = buf;
+ nvec_data.tx_size = size;
+
+ while (i++ < NVEC_ATTEMPTS_MAX) {
+ nvec_data.tx_pos = 0;
+
+ /* request */
+ gpio_set_value(nvec_data.gpio, 0);
+ res = nvec_do_io(&nvec_data, NVEC_WAIT_FOR_EC);
+ if (res != nvec_io_write_ok) {
+ debug("warning: nvec failed to send request\n");
+ continue;
+ }
+
+ /* response */
+ res = nvec_do_io(&nvec_data, NVEC_WAIT_FOR_EC);
+ if (res != nvec_io_read_ok) {
+ debug("warning: nvec failed to read response\n");
+ continue;
+ }
+
+ nvec_data.tx_buf = 0;
+ nvec_data.tx_size = 0;
+ nvec_data.tx_pos = 0;
+
+ return 0;
+ }
+
+ error("nvec failed to perform request\n");
+ return -1;
+}
+
+
+/**
+ * Init i2c controller to operate in slave mode.
+ *
+ * @param nvec nvec state struct
+ */
+static void nvec_init_i2c_slave(struct nvec_t *nvec)
+{
+ unsigned long val;
+
+ val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN |
+ (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
+ writel(val, nvec->base + I2C_CNFG);
+
+ /* i2c3 -> 67 */
+ clock_start_periph_pll(67, CLOCK_ID_PERIPH,
+ nvec->i2c_clk * 8);
+
+ reset_periph(67, 1);
+
+ writel(I2C_SL_NEWSL, nvec->base + I2C_SL_CNFG);
+ writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT);
+
+ writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1);
+ writel(0, nvec->base + I2C_SL_ADDR2);
+
+ funcmux_select(67, FUNCMUX_DEFAULT);
+}
+
+
+/**
+ * Decode the nvec information from the fdt.
+ *
+ * @param blob fdt blob
+ * @param config structure to store fdt config into
+ * @return 0 if ok, -ve on error
+ */
+static int nvec_decode_config(const void *blob,
+ struct fdt_nvec_config *config)
+{
+ int node;
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_NVIDIA_TEGRA20_NVEC);
+ if (node < 0) {
+ error("Cannot find NVEC node in fdt\n");
+ return node;
+ }
+
+ config->base_addr = fdtdec_get_addr(blob, node, "reg");
+ if (config->base_addr == FDT_ADDR_T_NONE) {
+ error("No NVEC controller address\n");
+ return -1;
+ }
+
+ if (fdtdec_decode_gpio(blob, node, "request-gpios",
+ &config->request_gpio)) {
+ error("No NVEC request gpio\n");
+ return -1;
+ }
+
+ config->i2c_addr = fdtdec_get_int(blob, node, "slave-addr", -1);
+ config->i2c_clk = fdtdec_get_int(blob, node, "clock-frequency", -1);
+
+ return 0;
+}
+
+
+int board_nvec_init(void)
+{
+ int res = 0;
+
+ struct fdt_nvec_config cfg;
+ if (nvec_decode_config(gd->fdt_blob, &cfg)) {
+ debug("Can't parse NVEC node in device tree\n");
+ return -1;
+ }
+
+ nvec_data.rx_pos = 0;
+ nvec_data.tx_buf = 0;
+ nvec_data.tx_pos = 0;
+ nvec_data.tx_size = 0;
+ nvec_data.state = NVST_BEGIN;
+
+ nvec_data.gpio = cfg.request_gpio.gpio;
+ nvec_data.i2c_addr = cfg.i2c_addr;
+ nvec_data.i2c_clk = cfg.i2c_clk;
+ nvec_data.base = (void __iomem *)cfg.base_addr;
+
+ debug("NVEC initialization...\n");
+
+ res = gpio_request(nvec_data.gpio, NULL);
+ if (res != 0)
+ error("NVEC: err, gpio_request\n");
+ res = gpio_direction_output(nvec_data.gpio, 1);
+ if (res != 0)
+ error("NVEC: err, gpio_direction\n");
+ res = gpio_set_value(nvec_data.gpio, 1);
+ if (res != 0)
+ error("NVEC: err, gpio_set_value\n");
+ udelay(100);
+
+ nvec_init_i2c_slave(&nvec_data);
+
+ nvec_enable_kbd_events();
+
+ return 1;
+}
+
+
+int nvec_read_events(void)
+{
+ int res;
+ int cnt = 0;
+
+ while (++cnt <= 8) {
+ res = nvec_do_io(&nvec_data, NVEC_DONT_WAIT_FOR_EC);
+ switch (res) {
+ case nvec_io_not_ready:
+ return 0;
+
+ case nvec_io_read_ok:
+ case nvec_io_retry:
+ break;
+
+ case nvec_io_error:
+ case nvec_io_timeout:
+ debug("NVEC events: io failed %d\n", res);
+ return 0;
+
+ case nvec_io_write_ok:
+ default:
+ debug("NVEC events: unexpected io result %d\n", res);
+ return 0;
+ }
+ }
+
+ return 0;
+}
diff --git a/drivers/i2c/tegra_nvec_keyboard.c b/drivers/i2c/tegra_nvec_keyboard.c
new file mode 100644
index 0000000..0837f08
--- /dev/null
+++ b/drivers/i2c/tegra_nvec_keyboard.c
@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2013
+ * Andrey Danin <andreydanin@xxxxxxx>
+ *
+ * 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 <circbuf.h>
+#include <asm/arch-tegra/tegra_nvec_keyboard.h>
+#include <asm/arch-tegra/tegra_nvec_keytable.h>
+#include <asm/arch-tegra/tegra_nvec.h>
+
+
+circbuf_t key_buf = { 0, 0, NULL, NULL, NULL, NULL };
+
+/* nvec commands */
+static char enable_kbd[] = { NVEC_KBD, ENABLE_KBD };
+static char reset_kbd[] = { NVEC_PS2, MOUSE_SEND_CMD, MOUSE_RESET, 3 };
+static char clear_leds[] = { NVEC_KBD, SET_LEDS, 0 };
+
+
+void nvec_push_key(unsigned short code, unsigned short state)
+{
+ int code_state;
+
+ assert(key_buf.totalsize > 0);
+
+ if (key_buf.size == key_buf.totalsize)
+ return;
+
+ code_state = ((state << 16) | code);
+ buf_push(&key_buf, (const char *)&code_state, sizeof(code_state));
+}
+
+
+int nvec_have_keys(void)
+{
+ return key_buf.size > 0;
+}
+
+
+int nvec_pop_key(void)
+{
+ int code_state;
+ int len = buf_pop(&key_buf, (char *)&code_state, sizeof(code_state));
+
+ if (len < sizeof(code_state))
+ return -1;
+
+ return code_state;
+}
+
+
+void nvec_process_keyboard_msg(const unsigned char *msg)
+{
+ int code, state;
+ int event_type;
+ int _size;
+
+ event_type = nvec_msg_event_type(msg);
+ if (event_type != NVEC_KEYBOARD)
+ return;
+
+ _size = (msg[0] & (3 << 5)) >> 5;
+
+ if (_size == NVEC_VAR_SIZE)
+ return;
+
+ if (_size == NVEC_3BYTES)
+ msg++;
+
+ code = msg[1] & 0x7f;
+ state = msg[1] & 0x80;
+
+ nvec_push_key(code_tabs[_size][code], state);
+}
+
+
+void nvec_enable_kbd_events(void)
+{
+ buf_init(&key_buf, NVEC_KEYS_QUEUE_SIZE * sizeof(int));
+
+ if (nvec_do_request(reset_kbd, 4))
+ error("NVEC: failed to reset keyboard\n");
+ if (nvec_do_request(clear_leds, 3))
+ error("NVEC: failed to clear leds\n");
+ if (nvec_do_request(enable_kbd, 2))
+ error("NVEC: failed to enable keyboard\n");
+
+ debug("NVEC: keyboard initialization finished\n");
+}
diff --git a/include/fdtdec.h b/include/fdtdec.h
index cd336fa..8917e34 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -79,6 +79,7 @@ enum fdt_compat_id {
COMPAT_NVIDIA_TEGRA20_SDMMC, /* Tegra20 SDMMC controller */
COMPAT_NVIDIA_TEGRA20_SFLASH, /* Tegra 2 SPI flash controller */
COMPAT_NVIDIA_TEGRA20_SLINK, /* Tegra 2 SPI SLINK controller */
+ COMPAT_NVIDIA_TEGRA20_NVEC, /* Tegra 2 EC controller */
COMPAT_NVIDIA_TEGRA114_SPI, /* Tegra 114 SPI controller */
COMPAT_SMSC_LAN9215, /* SMSC 10/100 Ethernet LAN9215 */
COMPAT_SAMSUNG_EXYNOS5_SROMC, /* Exynos5 SROMC */
diff --git a/lib/Makefile b/lib/Makefile
index 5d58609..b338211 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -34,6 +34,7 @@ COBJS-$(CONFIG_BZIP2) += bzlib_decompress.o
COBJS-$(CONFIG_BZIP2) += bzlib_randtable.o
COBJS-$(CONFIG_BZIP2) += bzlib_huffman.o
COBJS-$(CONFIG_USB_TTY) += circbuf.o
+COBJS-$(CONFIG_TEGRA_NVEC) += circbuf.o
COBJS-y += crc7.o
COBJS-y += crc16.o
COBJS-y += display_options.o
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index e322b82..4c70c79 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -52,6 +52,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
+ COMPAT(NVIDIA_TEGRA20_NVEC, "nvidia,tegra20-nvec"),
COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
COMPAT(SMSC_LAN9215, "smsc,lan9215"),
COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
--
1.7.1
References
