aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/nvec
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/staging/nvec')
-rw-r--r--drivers/staging/nvec/Kconfig12
-rw-r--r--drivers/staging/nvec/Makefile1
-rw-r--r--drivers/staging/nvec/TODO16
-rw-r--r--drivers/staging/nvec/nvec-keytable.h225
-rw-r--r--drivers/staging/nvec/nvec.c959
-rw-r--r--drivers/staging/nvec/nvec.h217
-rw-r--r--drivers/staging/nvec/nvec_kbd.c95
-rw-r--r--drivers/staging/nvec/nvec_power.c352
-rw-r--r--drivers/staging/nvec/nvec_ps2.c114
9 files changed, 1339 insertions, 652 deletions
diff --git a/drivers/staging/nvec/Kconfig b/drivers/staging/nvec/Kconfig
index 987ad48..86a8b8c 100644
--- a/drivers/staging/nvec/Kconfig
+++ b/drivers/staging/nvec/Kconfig
@@ -7,21 +7,27 @@ config MFD_NVEC
config KEYBOARD_NVEC
bool "Keyboard on nVidia compliant EC"
- depends on MFD_NVEC
+ depends on MFD_NVEC && INPUT=y
help
Say Y here to enable support for a keyboard connected to
a nVidia compliant embedded controller.
config SERIO_NVEC_PS2
bool "PS2 on nVidia EC"
- depends on MFD_NVEC
+ depends on MFD_NVEC && MOUSE_PS2
help
Say Y here to enable support for a Touchpad / Mouse connected
to a nVidia compliant embedded controller.
config NVEC_POWER
bool "NVEC charger and battery"
- depends on MFD_NVEC
+ depends on MFD_NVEC && POWER_SUPPLY=y
help
Say Y to enable support for battery and charger interface for
nVidia compliant embedded controllers.
+
+config NVEC_LEDS
+ bool "NVEC leds"
+ depends on MFD_NVEC && LEDS_CLASS
+ help
+ Say Y to enable yellow side leds on AC100 or other nVidia tegra nvec leds
diff --git a/drivers/staging/nvec/Makefile b/drivers/staging/nvec/Makefile
index 4b5fcec1..b844d60 100644
--- a/drivers/staging/nvec/Makefile
+++ b/drivers/staging/nvec/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_SERIO_NVEC_PS2) += nvec_ps2.o
obj-$(CONFIG_MFD_NVEC) += nvec.o
obj-$(CONFIG_NVEC_POWER) += nvec_power.o
obj-$(CONFIG_KEYBOARD_NVEC) += nvec_kbd.o
+obj-$(CONFIG_NVEC_LEDS) += nvec_leds.o
diff --git a/drivers/staging/nvec/TODO b/drivers/staging/nvec/TODO
index 77b47f7..f950ab8 100644
--- a/drivers/staging/nvec/TODO
+++ b/drivers/staging/nvec/TODO
@@ -1,8 +1,12 @@
ToDo list (incomplete, unordered)
- - convert mouse, keyboard, and power to platform devices
- - add copyright / driver author / license
- add compile as module support
- - move nvec devices to mfd cells?
- - adjust to kernel style
-
-
+ - fix clk usage
+ should not be using clk_get_sys(), but clk_get(&pdev->dev, conn)
+ where conn is either NULL if the device only has one clock, or
+ the device specific name if it has multiple clocks.
+ - move half of the nvec init stuff to i2c-tegra.c
+ - move event handling to nvec_events
+ - finish suspend/resume support
+ - modifiy the sync_write method to return the received
+ message in a variable (and return the error code).
+ - add support for more device implementations
diff --git a/drivers/staging/nvec/nvec-keytable.h b/drivers/staging/nvec/nvec-keytable.h
index 6a1c4f7..1dc22cb 100644
--- a/drivers/staging/nvec/nvec-keytable.h
+++ b/drivers/staging/nvec/nvec-keytable.h
@@ -22,7 +22,8 @@
*/
static unsigned short code_tab_102us[] = {
- KEY_GRAVE, // 0x00
+ /* 0x00 */
+ KEY_GRAVE,
KEY_ESC,
KEY_1,
KEY_2,
@@ -38,7 +39,8 @@ static unsigned short code_tab_102us[] = {
KEY_EQUAL,
KEY_BACKSPACE,
KEY_TAB,
- KEY_Q, // 0x10
+ /* 0x10 */
+ KEY_Q,
KEY_W,
KEY_E,
KEY_R,
@@ -54,7 +56,8 @@ static unsigned short code_tab_102us[] = {
KEY_LEFTCTRL,
KEY_A,
KEY_S,
- KEY_D, // 0x20
+ /* 0x20 */
+ KEY_D,
KEY_F,
KEY_G,
KEY_H,
@@ -70,7 +73,8 @@ static unsigned short code_tab_102us[] = {
KEY_X,
KEY_C,
KEY_V,
- KEY_B, // 0x30
+ /* 0x30 */
+ KEY_B,
KEY_N,
KEY_M,
KEY_COMMA,
@@ -86,13 +90,15 @@ static unsigned short code_tab_102us[] = {
KEY_F3,
KEY_F4,
KEY_F5,
- KEY_F6, // 0x40
+ /* 0x40 */
+ KEY_F6,
KEY_F7,
KEY_F8,
KEY_F9,
KEY_F10,
KEY_FN,
- 0, //VK_SCROLL
+ /* VK_SCROLL */
+ 0,
KEY_KP7,
KEY_KP8,
KEY_KP9,
@@ -102,52 +108,57 @@ static unsigned short code_tab_102us[] = {
KEY_KP6,
KEY_KPPLUS,
KEY_KP1,
- KEY_KP2, // 0x50
+ /* 0x50 */
+ KEY_KP2,
KEY_KP3,
KEY_KP0,
KEY_KPDOT,
- KEY_MENU, //VK_SNAPSHOT
+ /* VK_SNAPSHOT */
+ KEY_MENU,
KEY_POWER,
- KEY_102ND, //VK_OEM_102 henry+ 0x2B (43) BACKSLASH have been used,change to use 0X56 (86)
- KEY_F11, //VK_F11
- KEY_F12, //VK_F12
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0, // 60
- 0,
- 0,
- KEY_SEARCH, // add search key map
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0, // 70
- 0,
- 0,
- KEY_KP5, //73 for JP keyboard '\' key, report 0x4c
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- KEY_KP9, //7d for JP keyboard '|' key, report 0x49
+ /* VK_OEM_102 */
+ KEY_102ND,
+ KEY_F11,
+ KEY_F12,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ /* 0x60 */
+ 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[] = {
@@ -167,27 +178,35 @@ static unsigned short extcode_tab_us102[] = {
0,
0,
0,
- 0, // 0xE0 0x10
+ /* 0x10 */
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
0,
0,
+ /* VK_MEDIA_NEXT_TRACK */
0,
0,
0,
+ /* VK_RETURN */
0,
+ KEY_RIGHTCTRL,
0,
0,
- 0, //VK_MEDIA_NEXT_TRACK,
+ /* 0x20 */
+ KEY_MUTE,
+ /* VK_LAUNCH_APP1 */
0,
+ /* VK_MEDIA_PLAY_PAUSE */
0,
- 0, //VK_RETURN,
- KEY_RIGHTCTRL, //VK_RCONTROL,
0,
+ /* VK_MEDIA_STOP */
0,
- KEY_MUTE, // 0xE0 0x20
- 0, //VK_LAUNCH_APP1
- 0, //VK_MEDIA_PLAY_PAUSE
0,
- 0, //VK_MEDIA_STOP
0,
0,
0,
@@ -198,41 +217,54 @@ static unsigned short extcode_tab_us102[] = {
0,
0,
0,
+ /* 0x30 */
+ KEY_VOLUMEUP,
0,
- KEY_VOLUMEUP, // 0xE0 0x30
+ /* 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, //VK_BROWSER_HOME
0,
0,
- KEY_KPSLASH, //VK_DIVIDE
0,
- KEY_SYSRQ, //VK_SNAPSHOT
- KEY_RIGHTALT, //VK_RMENU
- 0, //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, //0xE0 0x40
- KEY_LEFT, //VK_OEM_NV_RESERVED henry+ for JP keyboard
- 0, //VK_OEM_NV_RESERVED
- 0, //VK_OEM_NV_RESERVED
- 0, //VK_OEM_NV_RESERVED
- 0, //VK_OEM_NV_RESERVED
KEY_CANCEL,
KEY_HOME,
KEY_UP,
- KEY_PAGEUP, //VK_PRIOR
+ KEY_PAGEUP,
0,
KEY_LEFT,
0,
KEY_RIGHT,
0,
KEY_END,
- KEY_DOWN, // 0xE0 0x50
- KEY_PAGEDOWN, //VK_NEXT
+ /* 0x50 */
+ KEY_DOWN,
+ KEY_PAGEDOWN,
KEY_INSERT,
KEY_DELETE,
0,
@@ -242,25 +274,34 @@ static unsigned short extcode_tab_us102[] = {
0,
0,
0,
- KEY_LEFTMETA, //VK_LWIN
- 0, //VK_RWIN
- KEY_ESC, //VK_APPS
- KEY_KPMINUS, //for power button workaround
- 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,
- 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
};
-static unsigned short* code_tabs[] = {code_tab_102us, extcode_tab_us102 };
+static unsigned short *code_tabs[] = { code_tab_102us, extcode_tab_us102 };
diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c
index 1a94364..e06b867 100644
--- a/drivers/staging/nvec/nvec.c
+++ b/drivers/staging/nvec/nvec.c
@@ -1,295 +1,706 @@
-// #define DEBUG
-
-/* ToDo list (incomplete, unorderd)
- - convert mouse, keyboard, and power to platform devices
-*/
-
-#include <asm/io.h>
-#include <asm/irq.h>
+/*
+ * NVEC: NVIDIA compliant embedded controller interface
+ *
+ * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net>
+ *
+ * Authors: Pierre-Hugues Husson <phhusson@free.fr>
+ * Ilya Petrov <ilya.muromec@gmail.com>
+ * Marc Dietrich <marvin24@gmx.de>
+ * Julian Andres Klode <jak@jak-linux.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+/* #define DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/atomic.h>
+#include <linux/clk.h>
#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
#include <linux/interrupt.h>
+#include <linux/io.h>
#include <linux/irq.h>
-#include <linux/slab.h>
-#include <linux/gpio.h>
-#include <linux/serio.h>
-#include <linux/delay.h>
-#include <linux/input.h>
-#include <linux/workqueue.h>
-#include <linux/clk.h>
-#include <mach/iomap.h>
-#include <mach/clk.h>
-#include <linux/semaphore.h>
#include <linux/list.h>
+#include <linux/mfd/core.h>
+#include <linux/mutex.h>
#include <linux/notifier.h>
-#include <linux/workqueue.h>
#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+
+#include <mach/clk.h>
+#include <mach/iomap.h>
+
#include "nvec.h"
-static unsigned char EC_DISABLE_EVENT_REPORTING[] = {'\x04','\x00','\x00'};
-static unsigned char EC_ENABLE_EVENT_REPORTING[] = {'\x04','\x00','\x01'};
-static unsigned char EC_GET_FIRMWARE_VERSION[] = {'\x07','\x15'};
+#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_NEWL (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_category - Message categories for nvec_msg_alloc()
+ * @NVEC_MSG_RX: The message is an incoming message (from EC)
+ * @NVEC_MSG_TX: The message is an outgoing message (to EC)
+ */
+enum nvec_msg_category {
+ NVEC_MSG_RX,
+ NVEC_MSG_TX,
+};
+
+static const unsigned char EC_DISABLE_EVENT_REPORTING[3] = "\x04\x00\x00";
+static const unsigned char EC_ENABLE_EVENT_REPORTING[3] = "\x04\x00\x01";
+static const unsigned char EC_GET_FIRMWARE_VERSION[2] = "\x07\x15";
static struct nvec_chip *nvec_power_handle;
+static struct mfd_cell nvec_devices[] = {
+ {
+ .name = "nvec-kbd",
+ .id = 1,
+ },
+ {
+ .name = "nvec-mouse",
+ .id = 1,
+ },
+ {
+ .name = "nvec-power",
+ .id = 1,
+ },
+ {
+ .name = "nvec-power",
+ .id = 2,
+ },
+ {
+ .name = "nvec-leds",
+ .id = 1,
+ },
+};
+
+/**
+ * nvec_register_notifier - Register a notifier with nvec
+ * @nvec: A &struct nvec_chip
+ * @nb: The notifier block to register
+ *
+ * Registers a notifier with @nvec. The notifier will be added to an atomic
+ * notifier chain that is called for all received messages except those that
+ * correspond to a request initiated by nvec_write_sync().
+ */
int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb,
- unsigned int events)
+ unsigned int events)
{
return atomic_notifier_chain_register(&nvec->notifier_list, nb);
}
EXPORT_SYMBOL_GPL(nvec_register_notifier);
-static int nvec_status_notifier(struct notifier_block *nb, unsigned long event_type,
- void *data)
+/**
+ * nvec_status_notifier - The final notifier
+ *
+ * Prints a message about control events not handled in the notifier
+ * chain.
+ */
+static int nvec_status_notifier(struct notifier_block *nb,
+ unsigned long event_type, void *data)
{
unsigned char *msg = (unsigned char *)data;
- int i;
- if(event_type != NVEC_CNTL)
+ if (event_type != NVEC_CNTL)
return NOTIFY_DONE;
- printk("unhandled msg type %ld, payload: ", event_type);
- for (i = 0; i < msg[1]; i++)
- printk("%0x ", msg[i+2]);
- printk("\n");
+ printk(KERN_WARNING "unhandled msg type %ld\n", event_type);
+ print_hex_dump(KERN_WARNING, "payload: ", DUMP_PREFIX_NONE, 16, 1,
+ msg, msg[1] + 2, true);
return NOTIFY_OK;
}
-void nvec_write_async(struct nvec_chip *nvec, unsigned char *data, short size)
+/**
+ * nvec_msg_alloc:
+ * @nvec: A &struct nvec_chip
+ * @category: Pool category, see &enum nvec_msg_category
+ *
+ * Allocate a single &struct nvec_msg object from the message pool of
+ * @nvec. The result shall be passed to nvec_msg_free() if no longer
+ * used.
+ *
+ * Outgoing messages are placed in the upper 75% of the pool, keeping the
+ * lower 25% available for RX buffers only. The reason is to prevent a
+ * situation where all buffers are full and a message is thus endlessly
+ * retried because the response could never be processed.
+ */
+static struct nvec_msg *nvec_msg_alloc(struct nvec_chip *nvec,
+ enum nvec_msg_category category)
+{
+ int i = (category == NVEC_MSG_TX) ? (NVEC_POOL_SIZE / 4) : 0;
+
+ for (; i < NVEC_POOL_SIZE; i++) {
+ if (atomic_xchg(&nvec->msg_pool[i].used, 1) == 0) {
+ dev_vdbg(nvec->dev, "INFO: Allocate %i\n", i);
+ return &nvec->msg_pool[i];
+ }
+ }
+
+ dev_err(nvec->dev, "could not allocate %s buffer\n",
+ (category == NVEC_MSG_TX) ? "TX" : "RX");
+
+ return NULL;
+}
+
+/**
+ * nvec_msg_free:
+ * @nvec: A &struct nvec_chip
+ * @msg: A message (must be allocated by nvec_msg_alloc() and belong to @nvec)
+ *
+ * Free the given message
+ */
+inline void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg)
{
- struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT);
+ if (msg != &nvec->tx_scratch)
+ dev_vdbg(nvec->dev, "INFO: Free %ti\n", msg - nvec->msg_pool);
+ atomic_set(&msg->used, 0);
+}
+EXPORT_SYMBOL_GPL(nvec_msg_free);
+
+/**
+ * nvec_msg_is_event - Return %true if @msg is an event
+ * @msg: A message
+ */
+static bool nvec_msg_is_event(struct nvec_msg *msg)
+{
+ return msg->data[0] >> 7;
+}
+
+/**
+ * nvec_msg_size - Get the size of a message
+ * @msg: The message to get the size for
+ *
+ * This only works for received messages, not for outgoing messages.
+ */
+static size_t nvec_msg_size(struct nvec_msg *msg)
+{
+ bool is_event = nvec_msg_is_event(msg);
+ int event_length = (msg->data[0] & 0x60) >> 5;
+
+ /* for variable size, payload size in byte 1 + count (1) + cmd (1) */
+ if (!is_event || event_length == NVEC_VAR_SIZE)
+ return (msg->pos || msg->size) ? (msg->data[1] + 2) : 0;
+ else if (event_length == NVEC_2BYTES)
+ return 2;
+ else if (event_length == NVEC_3BYTES)
+ return 3;
+ else
+ return 0;
+}
+
+/**
+ * nvec_gpio_set_value - Set the GPIO value
+ * @nvec: A &struct nvec_chip
+ * @value: The value to write (0 or 1)
+ *
+ * Like gpio_set_value(), but generating debugging information
+ */
+static void nvec_gpio_set_value(struct nvec_chip *nvec, int value)
+{
+ dev_dbg(nvec->dev, "GPIO changed from %u to %u\n",
+ gpio_get_value(nvec->gpio), value);
+ gpio_set_value(nvec->gpio, value);
+}
+
+/**
+ * nvec_write_async - Asynchronously write a message to NVEC
+ * @nvec: An nvec_chip instance
+ * @data: The message data, starting with the request type
+ * @size: The size of @data
+ *
+ * Queue a single message to be transferred to the embedded controller
+ * and return immediately.
+ *
+ * Returns: 0 on success, a negative error code on failure. If a failure
+ * occured, the nvec driver may print an error.
+ */
+int nvec_write_async(struct nvec_chip *nvec, const unsigned char *data,
+ short size)
+{
+ struct nvec_msg *msg;
+ unsigned long flags;
+
+ msg = nvec_msg_alloc(nvec, NVEC_MSG_TX);
+
+ if (msg == NULL)
+ return -ENOMEM;
- msg->data = kzalloc(size, GFP_NOWAIT);
msg->data[0] = size;
memcpy(msg->data + 1, data, size);
msg->size = size + 1;
- msg->pos = 0;
- INIT_LIST_HEAD(&msg->node);
+ spin_lock_irqsave(&nvec->tx_lock, flags);
list_add_tail(&msg->node, &nvec->tx_data);
+ spin_unlock_irqrestore(&nvec->tx_lock, flags);
+
+ queue_work(nvec->wq, &nvec->tx_work);
- gpio_set_value(nvec->gpio, 0);
+ return 0;
}
EXPORT_SYMBOL(nvec_write_async);
+/**
+ * nvec_write_sync - Write a message to nvec and read the response
+ * @nvec: An &struct nvec_chip
+ * @data: The data to write
+ * @size: The size of @data
+ *
+ * This is similar to nvec_write_async(), but waits for the
+ * request to be answered before returning. This function
+ * uses a mutex and can thus not be called from e.g.
+ * interrupt handlers.
+ *
+ * Returns: A pointer to the response message on success,
+ * %NULL on failure. Free with nvec_msg_free() once no longer
+ * used.
+ */
+struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec,
+ const unsigned char *data, short size)
+{
+ struct nvec_msg *msg;
+
+ mutex_lock(&nvec->sync_write_mutex);
+
+ nvec->sync_write_pending = (data[1] << 8) + data[0];
+
+ if (nvec_write_async(nvec, data, size) < 0)
+ return NULL;
+
+ dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n",
+ nvec->sync_write_pending);
+ if (!(wait_for_completion_timeout(&nvec->sync_write,
+ msecs_to_jiffies(2000)))) {
+ dev_warn(nvec->dev, "timeout waiting for sync write to complete\n");
+ mutex_unlock(&nvec->sync_write_mutex);
+ return NULL;
+ }
+
+ dev_dbg(nvec->dev, "nvec_sync_write: pong!\n");
+
+ msg = nvec->last_sync_msg;
+
+ mutex_unlock(&nvec->sync_write_mutex);
+
+ return msg;
+}
+EXPORT_SYMBOL(nvec_write_sync);
+
+/**
+ * nvec_request_master - Process outgoing messages
+ * @work: A &struct work_struct (the tx_worker member of &struct nvec_chip)
+ *
+ * Processes all outgoing requests by sending the request and awaiting the
+ * response, then continuing with the next request. Once a request has a
+ * matching response, it will be freed and removed from the list.
+ */
static void nvec_request_master(struct work_struct *work)
{
struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work);
+ unsigned long flags;
+ long err;
+ struct nvec_msg *msg;
+
+ spin_lock_irqsave(&nvec->tx_lock, flags);
+ while (!list_empty(&nvec->tx_data)) {
+ msg = list_first_entry(&nvec->tx_data, struct nvec_msg, node);
+ spin_unlock_irqrestore(&nvec->tx_lock, flags);
+ nvec_gpio_set_value(nvec, 0);
+ err = wait_for_completion_interruptible_timeout(
+ &nvec->ec_transfer, msecs_to_jiffies(5000));
+
+ if (err == 0) {
+ dev_warn(nvec->dev, "timeout waiting for ec transfer\n");
+ nvec_gpio_set_value(nvec, 1);
+ msg->pos = 0;
+ }
- if(!list_empty(&nvec->tx_data)) {
- gpio_set_value(nvec->gpio, 0);
+ spin_lock_irqsave(&nvec->tx_lock, flags);
+
+ if (err > 0) {
+ list_del_init(&msg->node);
+ nvec_msg_free(nvec, msg);
+ }
}
+ spin_unlock_irqrestore(&nvec->tx_lock, flags);
}
+/**
+ * parse_msg - Print some information and call the notifiers on an RX message
+ * @nvec: A &struct nvec_chip
+ * @msg: A message received by @nvec
+ *
+ * Paarse some pieces of the message and then call the chain of notifiers
+ * registered via nvec_register_notifier.
+ */
static int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg)
{
- int i;
-
- if((msg->data[0] & 1<<7) == 0 && msg->data[3]) {
- dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", msg->data[0],
- msg->data[1], msg->data[2], msg->data[3]);
+ if ((msg->data[0] & 1 << 7) == 0 && msg->data[3]) {
+ dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n",
+ msg->data[0], msg->data[1], msg->data[2], msg->data[3]);
return -EINVAL;
}
- if ((msg->data[0] >> 7 ) == 1 && (msg->data[0] & 0x0f) == 5)
- {
- dev_warn(nvec->dev, "ec system event ");
- for (i=0; i < msg->data[1]; i++)
- dev_warn(nvec->dev, "%02x ", msg->data[2+i]);
- dev_warn(nvec->dev, "\n");
- }
+ if ((msg->data[0] >> 7) == 1 && (msg->data[0] & 0x0f) == 5)
+ print_hex_dump(KERN_WARNING, "ec system event ",
+ DUMP_PREFIX_NONE, 16, 1, msg->data,
+ msg->data[1] + 2, true);
- atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, msg->data);
+ atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f,
+ msg->data);
return 0;
}
-static struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, unsigned char *data, short size)
-{
- down(&nvec->sync_write_mutex);
-
- nvec->sync_write_pending = (data[1] << 8) + data[0];
- nvec_write_async(nvec, data, size);
-
- dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", nvec->sync_write_pending);
- wait_for_completion(&nvec->sync_write);
- dev_dbg(nvec->dev, "nvec_sync_write: pong!\n");
-
- up(&nvec->sync_write_mutex);
-
- return nvec->last_sync_msg;
-}
-
-/* RX worker */
+/**
+ * nvec_dispatch - Process messages received from the EC
+ * @work: A &struct work_struct (the tx_worker member of &struct nvec_chip)
+ *
+ * Process messages previously received from the EC and put into the RX
+ * queue of the &struct nvec_chip instance associated with @work.
+ */
static void nvec_dispatch(struct work_struct *work)
{
struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work);
+ unsigned long flags;
struct nvec_msg *msg;
- while(!list_empty(&nvec->rx_data))
- {
+ spin_lock_irqsave(&nvec->rx_lock, flags);
+ while (!list_empty(&nvec->rx_data)) {
msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node);
list_del_init(&msg->node);
+ spin_unlock_irqrestore(&nvec->rx_lock, flags);
- if(nvec->sync_write_pending == (msg->data[2] << 8) + msg->data[0])
- {
+ if (nvec->sync_write_pending ==
+ (msg->data[2] << 8) + msg->data[0]) {
dev_dbg(nvec->dev, "sync write completed!\n");
nvec->sync_write_pending = 0;
nvec->last_sync_msg = msg;
complete(&nvec->sync_write);
} else {
parse_msg(nvec, msg);
- if((!msg) || (!msg->data))
- dev_warn(nvec->dev, "attempt access zero pointer");
- else {
- kfree(msg->data);
- kfree(msg);
- }
+ nvec_msg_free(nvec, msg);
}
+ spin_lock_irqsave(&nvec->rx_lock, flags);
+ }
+ spin_unlock_irqrestore(&nvec->rx_lock, flags);
+}
+
+/**
+ * nvec_tx_completed - Complete the current transfer
+ * @nvec: A &struct nvec_chip
+ *
+ * This is called when we have received an END_TRANS on a TX transfer.
+ */
+static void nvec_tx_completed(struct nvec_chip *nvec)
+{
+ /* We got an END_TRANS, let's skip this, maybe there's an event */
+ if (nvec->tx->pos != nvec->tx->size) {
+ dev_err(nvec->dev, "premature END_TRANS, resending\n");
+ nvec->tx->pos = 0;
+ nvec_gpio_set_value(nvec, 0);
+ } else {
+ nvec->state = 0;
}
}
-static irqreturn_t i2c_interrupt(int irq, void *dev)
+/**
+ * nvec_rx_completed - Complete the current transfer
+ * @nvec: A &struct nvec_chip
+ *
+ * This is called when we have received an END_TRANS on a RX transfer.
+ */
+static void nvec_rx_completed(struct nvec_chip *nvec)
+{
+ if (nvec->rx->pos != nvec_msg_size(nvec->rx)) {
+ dev_err(nvec->dev, "RX incomplete: Expected %u bytes, got %u\n",
+ (uint) nvec_msg_size(nvec->rx),
+ (uint) nvec->rx->pos);
+
+ nvec_msg_free(nvec, nvec->rx);
+ nvec->state = 0;
+
+ /* Battery quirk - Often incomplete, and likes to crash */
+ if (nvec->rx->data[0] == NVEC_BAT)
+ complete(&nvec->ec_transfer);
+
+ return;
+ }
+
+ spin_lock(&nvec->rx_lock);
+
+ /* add the received data to the work list
+ and move the ring buffer pointer to the next entry */
+ list_add_tail(&nvec->rx->node, &nvec->rx_data);
+
+ spin_unlock(&nvec->rx_lock);
+
+ nvec->state = 0;
+
+ if (!nvec_msg_is_event(nvec->rx))
+ complete(&nvec->ec_transfer);
+
+ queue_work(nvec->wq, &nvec->rx_work);
+}
+
+/**
+ * nvec_invalid_flags - Send an error message about invalid flags and jump
+ * @nvec: The nvec device
+ * @status: The status flags
+ * @reset: Whether we shall jump to state 0.
+ */
+static void nvec_invalid_flags(struct nvec_chip *nvec, unsigned int status,
+ bool reset)
+{
+ dev_err(nvec->dev, "unexpected status flags 0x%02x during state %i\n",
+ status, nvec->state);
+ if (reset)
+ nvec->state = 0;
+}
+
+/**
+ * nvec_tx_set - Set the message to transfer (nvec->tx)
+ * @nvec: A &struct nvec_chip
+ *
+ * Gets the first entry from the tx_data list of @nvec and sets the
+ * tx member to it. If the tx_data list is empty, this uses the
+ * tx_scratch message to send a no operation message.
+ */
+static void nvec_tx_set(struct nvec_chip *nvec)
+{
+ spin_lock(&nvec->tx_lock);
+ if (list_empty(&nvec->tx_data)) {
+ dev_err(nvec->dev, "empty tx - sending no-op\n");
+ memcpy(nvec->tx_scratch.data, "\x02\x07\x02", 3);
+ nvec->tx_scratch.size = 3;
+ nvec->tx_scratch.pos = 0;
+ nvec->tx = &nvec->tx_scratch;
+ list_add_tail(&nvec->tx->node, &nvec->tx_data);
+ } else {
+ nvec->tx = list_first_entry(&nvec->tx_data, struct nvec_msg,
+ node);
+ nvec->tx->pos = 0;
+ }
+ spin_unlock(&nvec->tx_lock);
+
+ dev_dbg(nvec->dev, "Sending message of length %u, command 0x%x\n",
+ (uint)nvec->tx->size, nvec->tx->data[1]);
+}
+
+/**
+ * nvec_interrupt - Interrupt handler
+ * @irq: The IRQ
+ * @dev: The nvec device
+ *
+ * Interrupt handler that fills our RX buffers and empties our TX
+ * buffers. This uses a finite state machine with ridiculous amounts
+ * of error checking, in order to be fairly reliable.
+ */
+static irqreturn_t nvec_interrupt(int irq, void *dev)
{
unsigned long status;
- unsigned long received;
- unsigned char to_send;
- struct nvec_msg *msg;
- struct nvec_chip *nvec = (struct nvec_chip *)dev;
- unsigned char *i2c_regs = nvec->i2c_regs;
+ unsigned int received = 0;
+ unsigned char to_send = 0xff;
+ const unsigned long irq_mask = I2C_SL_IRQ | END_TRANS | RCVD | RNW;
+ struct nvec_chip *nvec = dev;
+ unsigned int state = nvec->state;
- status = readl(i2c_regs + I2C_SL_STATUS);
+ status = readl(nvec->base + I2C_SL_STATUS);
- if(!(status & I2C_SL_IRQ))
- {
- dev_warn(nvec->dev, "nvec Spurious IRQ\n");
- //Yup, handled. ahum.
- goto handled;
+ /* Filter out some errors */
+ if ((status & irq_mask) == 0 && (status & ~irq_mask) != 0) {
+ dev_err(nvec->dev, "unexpected irq mask %lx\n", status);
+ return IRQ_HANDLED;
}
- if(status & END_TRANS && !(status & RCVD))
- {
- //Reenable IRQ only when even has been sent
- //printk("Write sequence ended !\n");
- //parse_msg(nvec);
- nvec->state = NVEC_WAIT;
- if(nvec->rx->size > 1)
- {
- list_add_tail(&nvec->rx->node, &nvec->rx_data);
- schedule_work(&nvec->rx_work);
+ if ((status & I2C_SL_IRQ) == 0) {
+ dev_err(nvec->dev, "Spurious IRQ\n");
+ return IRQ_HANDLED;
+ }
+
+ /* The EC did not request a read, so it send us something, read it */
+ if ((status & RNW) == 0) {
+ received = readl(nvec->base + I2C_SL_RCVD);
+ if (status & RCVD)
+ writel(0, nvec->base + I2C_SL_RCVD);
+ }
+
+ if (status == (I2C_SL_IRQ | RCVD))
+ nvec->state = 0;
+
+ switch (nvec->state) {
+ case 0: /* Verify that its a transfer start, the rest later */
+ if (status != (I2C_SL_IRQ | RCVD))
+ nvec_invalid_flags(nvec, status, false);
+ break;
+ case 1: /* command byte */
+ if (status != I2C_SL_IRQ) {
+ nvec_invalid_flags(nvec, status, true);
} else {
- kfree(nvec->rx->data);
- kfree(nvec->rx);
+ nvec->rx = nvec_msg_alloc(nvec, NVEC_MSG_RX);
+ /* Should not happen in a normal world */
+ if (unlikely(nvec->rx == NULL)) {
+ nvec->state = 0;
+ break;
+ }
+ nvec->rx->data[0] = received;
+ nvec->rx->pos = 1;
+ nvec->state = 2;
}
- return IRQ_HANDLED;
- } else if(status & RNW)
- {
- // Work around for AP20 New Slave Hw Bug. Give 1us extra.
- // nvec/smbus/nvec_i2c_transport.c in NV`s crap for reference
- if(status & RCVD)
- udelay(3);
-
- if(status & RCVD)
- {
- nvec->state = NVEC_WRITE;
- //Master wants something from us. New communication
-// dev_dbg(nvec->dev, "New read comm!\n");
+ break;
+ case 2: /* first byte after command */
+ if (status == (I2C_SL_IRQ | RNW | RCVD)) {
+ udelay(33);
+ if (nvec->rx->data[0] != 0x01) {
+ dev_err(nvec->dev,
+ "Read without prior read command\n");
+ nvec->state = 0;
+ break;
+ }
+ nvec_msg_free(nvec, nvec->rx);
+ nvec->state = 3;
+ nvec_tx_set(nvec);
+ BUG_ON(nvec->tx->size < 1);
+ to_send = nvec->tx->data[0];
+ nvec->tx->pos = 1;
+ } else if (status == (I2C_SL_IRQ)) {
+ BUG_ON(nvec->rx == NULL);
+ nvec->rx->data[1] = received;
+ nvec->rx->pos = 2;
+ nvec->state = 4;
} else {
- //Master wants something from us from a communication we've already started
-// dev_dbg(nvec->dev, "Read comm cont !\n");
+ nvec_invalid_flags(nvec, status, true);
}
- //if(msg_pos<msg_size) {
- if(list_empty(&nvec->tx_data))
- {
- dev_err(nvec->dev, "nvec empty tx - sending no-op\n");
- to_send = 0x8a;
- nvec_write_async(nvec, "\x07\x02", 2);
-// to_send = 0x01;
+ break;
+ case 3: /* EC does a block read, we transmit data */
+ if (status & END_TRANS) {
+ nvec_tx_completed(nvec);
+ } else if ((status & RNW) == 0 || (status & RCVD)) {
+ nvec_invalid_flags(nvec, status, true);
+ } else if (nvec->tx && nvec->tx->pos < nvec->tx->size) {
+ to_send = nvec->tx->data[nvec->tx->pos++];
} else {
- msg = list_first_entry(&nvec->tx_data, struct nvec_msg, node);
- if(msg->pos < msg->size) {
- to_send = msg->data[msg->pos];
- msg->pos++;
- } else {
- dev_err(nvec->dev, "nvec crap! %d\n", msg->size);
- to_send = 0x01;
- }
-
- if(msg->pos >= msg->size)
- {
- list_del_init(&msg->node);
- kfree(msg->data);
- kfree(msg);
- schedule_work(&nvec->tx_work);
- nvec->state = NVEC_WAIT;
- }
+ dev_err(nvec->dev, "tx buffer underflow on %p (%u > %u)\n",
+ nvec->tx,
+ (uint) (nvec->tx ? nvec->tx->pos : 0),
+ (uint) (nvec->tx ? nvec->tx->size : 0));
+ nvec->state = 0;
}
- writel(to_send, i2c_regs + I2C_SL_RCVD);
-
- gpio_set_value(nvec->gpio, 1);
+ break;
+ case 4: /* EC does some write, we read the data */
+ if ((status & (END_TRANS | RNW)) == END_TRANS)
+ nvec_rx_completed(nvec);
+ else if (status & (RNW | RCVD))
+ nvec_invalid_flags(nvec, status, true);
+ else if (nvec->rx && nvec->rx->pos < NVEC_MSG_SIZE)
+ nvec->rx->data[nvec->rx->pos++] = received;
+ else
+ dev_err(nvec->dev,
+ "RX buffer overflow on %p: "
+ "Trying to write byte %u of %u\n",
+ nvec->rx, nvec->rx->pos, NVEC_MSG_SIZE);
+ break;
+ default:
+ nvec->state = 0;
+ }
- dev_dbg(nvec->dev, "nvec sent %x\n", to_send);
+ /* If we are told that a new transfer starts, verify it */
+ if ((status & (RCVD | RNW)) == RCVD) {
+ if (received != nvec->i2c_addr)
+ dev_err(nvec->dev,
+ "received address 0x%02x, expected 0x%02x\n",
+ received, nvec->i2c_addr);
+ nvec->state = 1;
+ }
- goto handled;
- } else {
- received = readl(i2c_regs + I2C_SL_RCVD);
- //Workaround?
- if(status & RCVD) {
- writel(0, i2c_regs + I2C_SL_RCVD);
- goto handled;
- }
+ /* Send data if requested, but not on end of transmission */
+ if ((status & (RNW | END_TRANS)) == RNW)
+ writel(to_send, nvec->base + I2C_SL_RCVD);
+
+ /* If we have send the first byte */
+ if (status == (I2C_SL_IRQ | RNW | RCVD))
+ nvec_gpio_set_value(nvec, 1);
+
+ dev_dbg(nvec->dev,
+ "Handled: %s 0x%02x, %s 0x%02x in state %u [%s%s%s]\n",
+ (status & RNW) == 0 ? "received" : "R=",
+ received,
+ (status & (RNW | END_TRANS)) ? "sent" : "S=",
+ to_send,
+ state,
+ status & END_TRANS ? " END_TRANS" : "",
+ status & RCVD ? " RCVD" : "",
+ status & RNW ? " RNW" : "");
+
+
+ /*
+ * TODO: A correct fix needs to be found for this.
+ *
+ * We experience less incomplete messages with this delay than without
+ * it, but we don't know why. Help is appreciated.
+ */
+ udelay(100);
- if (nvec->state == NVEC_WAIT)
- {
- nvec->state = NVEC_READ;
- msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT);
- msg->data = kzalloc(32, GFP_NOWAIT);
- INIT_LIST_HEAD(&msg->node);
- nvec->rx = msg;
- } else
- msg = nvec->rx;
-
- BUG_ON(msg->pos > 32);
-
- msg->data[msg->pos] = received;
- msg->pos++;
- msg->size = msg->pos;
- dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", received, msg->pos);
- }
-handled:
return IRQ_HANDLED;
}
-static int __devinit nvec_add_subdev(struct nvec_chip *nvec, struct nvec_subdev *subdev)
+static void tegra_init_i2c_slave(struct nvec_chip *nvec)
{
- struct platform_device *pdev;
+ u32 val;
- pdev = platform_device_alloc(subdev->name, subdev->id);
- pdev->dev.parent = nvec->dev;
- pdev->dev.platform_data = subdev->platform_data;
+ clk_enable(nvec->i2c_clk);
- return platform_device_add(pdev);
-}
+ tegra_periph_reset_assert(nvec->i2c_clk);
+ udelay(2);
+ tegra_periph_reset_deassert(nvec->i2c_clk);
-static void tegra_init_i2c_slave(struct nvec_platform_data *pdata, unsigned char *i2c_regs,
- struct clk *i2c_clk)
-{
- u32 val;
+ val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN |
+ (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
+ writel(val, nvec->base + I2C_CNFG);
- clk_enable(i2c_clk);
- tegra_periph_reset_assert(i2c_clk);
- udelay(2);
- tegra_periph_reset_deassert(i2c_clk);
+ clk_set_rate(nvec->i2c_clk, 8 * 80000);
- writel(pdata->i2c_addr>>1, i2c_regs + I2C_SL_ADDR1);
- writel(0, i2c_regs + I2C_SL_ADDR2);
+ writel(I2C_SL_NEWL, nvec->base + I2C_SL_CNFG);
+ writel(0x1E, nvec->base + I2C_SL_DELAY_COUNT);
- writel(0x1E, i2c_regs + I2C_SL_DELAY_COUNT);
- val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN |
- (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
- writel(val, i2c_regs + I2C_CNFG);
- writel(I2C_SL_NEWL, i2c_regs + I2C_SL_CNFG);
+ writel(nvec->i2c_addr>>1, nvec->base + I2C_SL_ADDR1);
+ writel(0, nvec->base + I2C_SL_ADDR2);
+
+ enable_irq(nvec->irq);
- clk_disable(i2c_clk);
+ clk_disable(nvec->i2c_clk);
+}
+
+static void nvec_disable_i2c_slave(struct nvec_chip *nvec)
+{
+ disable_irq(nvec->irq);
+ writel(I2C_SL_NEWL | I2C_SL_NACK, nvec->base + I2C_SL_CNFG);
+ clk_disable(nvec->i2c_clk);
}
static void nvec_power_off(void)
@@ -300,86 +711,96 @@ static void nvec_power_off(void)
static int __devinit tegra_nvec_probe(struct platform_device *pdev)
{
- int err, i, ret;
+ int err, ret;
struct clk *i2c_clk;
struct nvec_platform_data *pdata = pdev->dev.platform_data;
struct nvec_chip *nvec;
struct nvec_msg *msg;
- unsigned char *i2c_regs;
+ struct resource *res;
+ struct resource *iomem;
+ void __iomem *base;
nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL);
- if(nvec == NULL) {
+ if (nvec == NULL) {
dev_err(&pdev->dev, "failed to reserve memory\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, nvec);
nvec->dev = &pdev->dev;
nvec->gpio = pdata->gpio;
- nvec->irq = pdata->irq;
+ nvec->i2c_addr = pdata->i2c_addr;
-/*
- i2c_clk=clk_get_sys(NULL, "i2c");
- if(IS_ERR_OR_NULL(i2c_clk))
- printk(KERN_ERR"No such clock tegra-i2c.2\n");
- else
- clk_enable(i2c_clk);
-*/
- i2c_regs = ioremap(pdata->base, pdata->size);
- if(!i2c_regs) {
- dev_err(nvec->dev, "failed to ioremap registers\n");
- goto failed;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no mem resource?\n");
+ return -ENODEV;
}
- nvec->i2c_regs = i2c_regs;
+ iomem = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (!iomem) {
+ dev_err(&pdev->dev, "I2C region already claimed\n");
+ return -EBUSY;
+ }
- i2c_clk = clk_get_sys(pdata->clock, NULL);
- if(IS_ERR_OR_NULL(i2c_clk)) {
- dev_err(nvec->dev, "failed to get clock tegra-i2c.2\n");
- goto failed;
+ base = ioremap(iomem->start, resource_size(iomem));
+ if (!base) {
+ dev_err(&pdev->dev, "Can't ioremap I2C region\n");
+ return -ENOMEM;
}
- tegra_init_i2c_slave(pdata, i2c_regs, i2c_clk);
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no irq resource?\n");
+ ret = -ENODEV;
+ goto err_iounmap;
+ }
- err = request_irq(nvec->irq, i2c_interrupt, IRQF_DISABLED, "nvec", nvec);
- if(err) {
- dev_err(nvec->dev, "couldn't request irq");
- goto failed;
+ i2c_clk = clk_get_sys("tegra-i2c.2", NULL);
+ if (IS_ERR(i2c_clk)) {
+ dev_err(nvec->dev, "failed to get controller clock\n");
+ goto err_iounmap;
}
- clk_enable(i2c_clk);
- clk_set_rate(i2c_clk, 8*80000);
+ nvec->base = base;
+ nvec->irq = res->start;
+ nvec->i2c_clk = i2c_clk;
+ nvec->rx = &nvec->msg_pool[0];
/* Set the gpio to low when we've got something to say */
err = gpio_request(nvec->gpio, "nvec gpio");
- if(err < 0)
+ if (err < 0)
dev_err(nvec->dev, "couldn't request gpio\n");
- tegra_gpio_enable(nvec->gpio);
- gpio_direction_output(nvec->gpio, 1);
- gpio_set_value(nvec->gpio, 1);
-
ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list);
init_completion(&nvec->sync_write);
- sema_init(&nvec->sync_write_mutex, 1);
- INIT_LIST_HEAD(&nvec->tx_data);
+ init_completion(&nvec->ec_transfer);
+ mutex_init(&nvec->sync_write_mutex);
+ spin_lock_init(&nvec->tx_lock);
+ spin_lock_init(&nvec->rx_lock);
INIT_LIST_HEAD(&nvec->rx_data);
+ INIT_LIST_HEAD(&nvec->tx_data);
INIT_WORK(&nvec->rx_work, nvec_dispatch);
INIT_WORK(&nvec->tx_work, nvec_request_master);
+ nvec->wq = alloc_workqueue("nvec", WQ_NON_REENTRANT, 2);
- /* enable event reporting */
- nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING,
- sizeof(EC_ENABLE_EVENT_REPORTING));
+ err = request_irq(nvec->irq, nvec_interrupt, 0, "nvec", nvec);
+ if (err) {
+ dev_err(nvec->dev, "couldn't request irq\n");
+ goto failed;
+ }
+ disable_irq(nvec->irq);
- nvec_kbd_init(nvec);
-#ifdef CONFIG_SERIO_NVEC_PS2
- nvec_ps2(nvec);
-#endif
+ tegra_init_i2c_slave(nvec);
- /* setup subdevs */
- for (i = 0; i < pdata->num_subdevs; i++) {
- ret = nvec_add_subdev(nvec, &pdata->subdevs[i]);
- }
+ clk_enable(i2c_clk);
+
+ gpio_direction_output(nvec->gpio, 1);
+ gpio_set_value(nvec->gpio, 1);
+
+ /* enable event reporting */
+ nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING,
+ sizeof(EC_ENABLE_EVENT_REPORTING));
nvec->nvec_status_notifier.notifier_call = nvec_status_notifier;
nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0);
@@ -391,14 +812,20 @@ static int __devinit tegra_nvec_probe(struct platform_device *pdev)
msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION,
sizeof(EC_GET_FIRMWARE_VERSION));
- dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n",
+ if (msg) {
+ dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n",
msg->data[4], msg->data[5], msg->data[6], msg->data[7]);
- kfree(msg->data);
- kfree(msg);
+ nvec_msg_free(nvec, msg);
+ }
+
+ ret = mfd_add_devices(nvec->dev, -1, nvec_devices,
+ ARRAY_SIZE(nvec_devices), base, 0);
+ if (ret)
+ dev_err(nvec->dev, "error adding subdevices\n");
/* unmute speakers? */
- nvec_write_async(nvec, "\x0d\x10\x59\x94", 4);
+ nvec_write_async(nvec, "\x0d\x10\x59\x95", 4);
/* enable lid switch event */
nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7);
@@ -408,6 +835,8 @@ static int __devinit tegra_nvec_probe(struct platform_device *pdev)
return 0;
+err_iounmap:
+ iounmap(base);
failed:
kfree(nvec);
return -ENOMEM;
@@ -415,7 +844,16 @@ failed:
static int __devexit tegra_nvec_remove(struct platform_device *pdev)
{
- // TODO: unregister
+ struct nvec_chip *nvec = platform_get_drvdata(pdev);
+
+ nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3);
+ mfd_remove_devices(nvec->dev);
+ free_irq(nvec->irq, &nvec_interrupt);
+ iounmap(nvec->base);
+ gpio_free(nvec->gpio);
+ destroy_workqueue(nvec->wq);
+ kfree(nvec);
+
return 0;
}
@@ -424,19 +862,27 @@ static int __devexit tegra_nvec_remove(struct platform_device *pdev)
static int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state)
{
struct nvec_chip *nvec = platform_get_drvdata(pdev);
+ struct nvec_msg *msg;
dev_dbg(nvec->dev, "suspending\n");
- nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3);
- nvec_write_async(nvec, "\x04\x02", 2);
+
+ /* keep these sync or you'll break suspend */
+ msg = nvec_write_sync(nvec, EC_DISABLE_EVENT_REPORTING, 3);
+ nvec_msg_free(nvec, msg);
+ msg = nvec_write_sync(nvec, "\x04\x02", 2);
+ nvec_msg_free(nvec, msg);
+
+ nvec_disable_i2c_slave(nvec);
return 0;
}
-static int tegra_nvec_resume(struct platform_device *pdev) {
-
+static int tegra_nvec_resume(struct platform_device *pdev)
+{
struct nvec_chip *nvec = platform_get_drvdata(pdev);
dev_dbg(nvec->dev, "resuming\n");
+ tegra_init_i2c_slave(nvec);
nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3);
return 0;
@@ -447,13 +893,12 @@ static int tegra_nvec_resume(struct platform_device *pdev) {
#define tegra_nvec_resume NULL
#endif
-static struct platform_driver nvec_device_driver =
-{
- .probe = tegra_nvec_probe,
- .remove = __devexit_p(tegra_nvec_remove),
+static struct platform_driver nvec_device_driver = {
+ .probe = tegra_nvec_probe,
+ .remove = __devexit_p(tegra_nvec_remove),
.suspend = tegra_nvec_suspend,
- .resume = tegra_nvec_resume,
- .driver = {
+ .resume = tegra_nvec_resume,
+ .driver = {
.name = "nvec",
.owner = THIS_MODULE,
}
@@ -465,4 +910,8 @@ static int __init tegra_nvec_init(void)
}
module_init(tegra_nvec_init);
+
MODULE_ALIAS("platform:nvec");
+MODULE_DESCRIPTION("NVIDIA compliant embedded controller interface");
+MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/nvec/nvec.h b/drivers/staging/nvec/nvec.h
index a2d82dc..a4c17b0 100644
--- a/drivers/staging/nvec/nvec.h
+++ b/drivers/staging/nvec/nvec.h
@@ -1,110 +1,203 @@
+/*
+ * NVEC: NVIDIA compliant embedded controller interface
+ *
+ * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
+ *
+ * Authors: Pierre-Hugues Husson <phhusson@free.fr>
+ * Ilya Petrov <ilya.muromec@gmail.com>
+ * Marc Dietrich <marvin24@gmx.de>
+ * Julian Andres Klode <jak@jak-linux.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
#ifndef __LINUX_MFD_NVEC
#define __LINUX_MFD_NVEC
-#include <linux/semaphore.h>
-
-typedef enum {
+#include <linux/atomic.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+
+/* NVEC_POOL_SIZE - Size of the pool in &struct nvec_msg */
+#define NVEC_POOL_SIZE 64
+
+/*
+ * NVEC_MSG_SIZE - Maximum size of the data field of &struct nvec_msg.
+ *
+ * A message must store up to a SMBus block operation which consists of
+ * one command byte, one count byte, and up to 32 payload bytes = 34
+ * byte.
+ */
+#define NVEC_MSG_SIZE 34
+
+/**
+ * enum nvec_event_size - The size of an event message
+ * @NVEC_2BYTES: The message has one command byte and one data byte
+ * @NVEC_3BYTES: The message has one command byte and two data bytes
+ * @NVEC_VAR_SIZE: The message has one command byte, one count byte, and as
+ * up to as many bytes as the number in the count byte. The
+ * maximum is 32
+ *
+ * Events can be fixed or variable sized. This is useless on other message
+ * types, which are always variable sized.
+ */
+enum nvec_event_size {
NVEC_2BYTES,
NVEC_3BYTES,
- NVEC_VAR_SIZE
-} nvec_size;
-
-typedef enum {
- NOT_REALLY,
- YES,
- NOT_AT_ALL,
-} how_care;
+ NVEC_VAR_SIZE,
+};
-typedef enum {
- NVEC_SYS=1,
+/**
+ * enum nvec_msg_type - The type of a message
+ * @NVEC_SYS: A system request/response
+ * @NVEC_BAT: A battery request/response
+ * @NVEC_KBD: A keyboard request/response
+ * @NVEC_PS2: A mouse request/response
+ * @NVEC_CNTL: A EC control request/response
+ * @NVEC_KB_EVT: An event from the keyboard
+ * @NVEC_PS2_EVT: An event from the mouse
+ *
+ * Events can be fixed or variable sized. This is useless on other message
+ * types, which are always variable sized.
+ */
+enum nvec_msg_type {
+ NVEC_SYS = 1,
NVEC_BAT,
NVEC_KBD = 5,
NVEC_PS2,
NVEC_CNTL,
NVEC_KB_EVT = 0x80,
- NVEC_PS2_EVT
-} nvec_event;
-
-typedef enum {
- NVEC_WAIT,
- NVEC_READ,
- NVEC_WRITE
-} nvec_state;
+ NVEC_PS2_EVT,
+};
+/**
+ * struct nvec_msg - A buffer for a single message
+ * @node: Messages are part of various lists in a &struct nvec_chip
+ * @data: The data of the message
+ * @size: For TX messages, the number of bytes used in @data
+ * @pos: For RX messages, the current position to write to. For TX messages,
+ * the position to read from.
+ * @used: Used for the message pool to mark a message as free/allocated.
+ *
+ * This structure is used to hold outgoing and incoming messages. Outgoing
+ * messages have a different format than incoming messages, and that is not
+ * documented yet.
+ */
struct nvec_msg {
- unsigned char *data;
+ struct list_head node;
+ unsigned char data[NVEC_MSG_SIZE];
unsigned short size;
unsigned short pos;
- struct list_head node;
+ atomic_t used;
};
+/**
+ * struct nvec_subdev - A subdevice of nvec, such as nvec_kbd
+ * @name: The name of the sub device
+ * @platform_data: Platform data
+ * @id: Identifier of the sub device
+ */
struct nvec_subdev {
const char *name;
void *platform_data;
int id;
};
+/**
+ * struct nvec_platform_data - platform data for a tegra slave controller
+ * @i2c_addr: number of i2c slave adapter the ec is connected to
+ * @gpio: gpio number for the ec request line
+ *
+ * Platform data, to be used in board definitions. For an example, take a
+ * look at the paz00 board in arch/arm/mach-tegra/board-paz00.c
+ */
struct nvec_platform_data {
- int num_subdevs;
int i2c_addr;
int gpio;
- int irq;
- int base;
- int size;
- char clock[16];
- struct nvec_subdev *subdevs;
};
+/**
+ * struct nvec_chip - A single connection to an NVIDIA Embedded controller
+ * @dev: The device
+ * @gpio: The same as for &struct nvec_platform_data
+ * @irq: The IRQ of the I2C device
+ * @i2c_addr: The address of the I2C slave
+ * @base: The base of the memory mapped region of the I2C device
+ * @clk: The clock of the I2C device
+ * @notifier_list: Notifiers to be called on received messages, see
+ * nvec_register_notifier()
+ * @rx_data: Received messages that have to be processed
+ * @tx_data: Messages waiting to be sent to the controller
+ * @nvec_status_notifier: Internal notifier (see nvec_status_notifier())
+ * @rx_work: A work structure for the RX worker nvec_dispatch()
+ * @tx_work: A work structure for the TX worker nvec_request_master()
+ * @wq: The work queue in which @rx_work and @tx_work are executed
+ * @rx: The message currently being retrieved or %NULL
+ * @msg_pool: A pool of messages for allocation
+ * @tx: The message currently being transferred
+ * @tx_scratch: Used for building pseudo messages
+ * @ec_transfer: A completion that will be completed once a message has been
+ * received (see nvec_rx_completed())
+ * @tx_lock: Spinlock for modifications on @tx_data
+ * @rx_lock: Spinlock for modifications on @rx_data
+ * @sync_write_mutex: A mutex for nvec_write_sync()
+ * @sync_write: A completion to signal that a synchronous message is complete
+ * @sync_write_pending: The first two bytes of the request (type and subtype)
+ * @last_sync_msg: The last synchronous message.
+ * @state: State of our finite state machine used in nvec_interrupt()
+ */
struct nvec_chip {
struct device *dev;
int gpio;
int irq;
- unsigned char *i2c_regs;
- nvec_state state;
+ int i2c_addr;
+ void __iomem *base;
+ struct clk *i2c_clk;
struct atomic_notifier_head notifier_list;
struct list_head rx_data, tx_data;
struct notifier_block nvec_status_notifier;
struct work_struct rx_work, tx_work;
- struct nvec_msg *rx, *tx;
+ struct workqueue_struct *wq;
+ struct nvec_msg msg_pool[NVEC_POOL_SIZE];
+ struct nvec_msg *rx;
+
+ struct nvec_msg *tx;
+ struct nvec_msg tx_scratch;
+ struct completion ec_transfer;
+
+ spinlock_t tx_lock, rx_lock;
-/* sync write stuff */
- struct semaphore sync_write_mutex;
+ /* sync write stuff */
+ struct mutex sync_write_mutex;
struct completion sync_write;
u16 sync_write_pending;
struct nvec_msg *last_sync_msg;
+
+ int state;
};
-extern void nvec_write_async(struct nvec_chip *nvec, unsigned char *data, short size);
+extern int nvec_write_async(struct nvec_chip *nvec, const unsigned char *data,
+ short size);
+
+extern struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec,
+ const unsigned char *data, short size);
extern int nvec_register_notifier(struct nvec_chip *nvec,
- struct notifier_block *nb, unsigned int events);
+ struct notifier_block *nb,
+ unsigned int events);
extern int nvec_unregister_notifier(struct device *dev,
- struct notifier_block *nb, unsigned int events);
-
-const char *nvec_send_msg(unsigned char *src, unsigned char *dst_size, how_care care_resp, void (*rt_handler)(unsigned char *data));
-
-extern int nvec_ps2(struct nvec_chip *nvec);
-extern int nvec_kbd_init(struct nvec_chip *nvec);
-
-#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_NEWL (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
+ struct notifier_block *nb,
+ unsigned int events);
+
+extern void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg);
#endif
diff --git a/drivers/staging/nvec/nvec_kbd.c b/drivers/staging/nvec/nvec_kbd.c
index 9a98507..a4ce5a7 100644
--- a/drivers/staging/nvec/nvec_kbd.c
+++ b/drivers/staging/nvec/nvec_kbd.c
@@ -1,42 +1,76 @@
+/*
+ * nvec_kbd: keyboard driver for a NVIDIA compliant embedded controller
+ *
+ * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
+ *
+ * Authors: Pierre-Hugues Husson <phhusson@free.fr>
+ * Marc Dietrich <marvin24@gmx.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/delay.h>
+#include <linux/platform_device.h>
+
#include "nvec-keytable.h"
#include "nvec.h"
-#define ACK_KBD_EVENT {'\x05','\xed','\x01'}
+#define ACK_KBD_EVENT {'\x05', '\xed', '\x01'}
+static const char led_on[3] = "\x05\xed\x07";
+static const char led_off[3] = "\x05\xed\x00";
static unsigned char keycodes[ARRAY_SIZE(code_tab_102us)
- + ARRAY_SIZE(extcode_tab_us102)];
+ + ARRAY_SIZE(extcode_tab_us102)];
struct nvec_keys {
struct input_dev *input;
struct notifier_block notifier;
struct nvec_chip *nvec;
+ bool caps_lock;
};
static struct nvec_keys keys_dev;
+static void nvec_kbd_toggle_led(void)
+{
+ keys_dev.caps_lock = !keys_dev.caps_lock;
+
+ if (keys_dev.caps_lock)
+ nvec_write_async(keys_dev.nvec, led_on, sizeof(led_on));
+ else
+ nvec_write_async(keys_dev.nvec, led_off, sizeof(led_off));
+}
+
static int nvec_keys_notifier(struct notifier_block *nb,
- unsigned long event_type, void *data)
+ unsigned long event_type, void *data)
{
int code, state;
unsigned char *msg = (unsigned char *)data;
if (event_type == NVEC_KB_EVT) {
- nvec_size _size = (msg[0] & (3 << 5)) >> 5;
+ int _size = (msg[0] & (3 << 5)) >> 5;
/* power on/off button */
- if(_size == NVEC_VAR_SIZE)
+ if (_size == NVEC_VAR_SIZE)
return NOTIFY_STOP;
- if(_size == NVEC_3BYTES)
+ if (_size == NVEC_3BYTES)
msg++;
code = msg[1] & 0x7f;
state = msg[1] & 0x80;
- input_report_key(keys_dev.input, code_tabs[_size][code], !state);
+ if (code_tabs[_size][code] == KEY_CAPSLOCK && state)
+ nvec_kbd_toggle_led();
+
+ input_report_key(keys_dev.input, code_tabs[_size][code],
+ !state);
input_sync(keys_dev.input);
return NOTIFY_STOP;
@@ -46,18 +80,18 @@ static int nvec_keys_notifier(struct notifier_block *nb,
}
static int nvec_kbd_event(struct input_dev *dev, unsigned int type,
- unsigned int code, int value)
+ unsigned int code, int value)
{
unsigned char buf[] = ACK_KBD_EVENT;
struct nvec_chip *nvec = keys_dev.nvec;
- if(type==EV_REP)
+ if (type == EV_REP)
return 0;
- if(type!=EV_LED)
+ if (type != EV_LED)
return -1;
- if(code!=LED_CAPSL)
+ if (code != LED_CAPSL)
return -1;
buf[2] = !!value;
@@ -66,22 +100,23 @@ static int nvec_kbd_event(struct input_dev *dev, unsigned int type,
return 0;
}
-int __init nvec_kbd_init(struct nvec_chip *nvec)
+static int __devinit nvec_kbd_probe(struct platform_device *pdev)
{
+ struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
int i, j, err;
struct input_dev *idev;
j = 0;
- for(i = 0; i < ARRAY_SIZE(code_tab_102us); ++i)
+ for (i = 0; i < ARRAY_SIZE(code_tab_102us); ++i)
keycodes[j++] = code_tab_102us[i];
- for(i = 0; i < ARRAY_SIZE(extcode_tab_us102); ++i)
- keycodes[j++]=extcode_tab_us102[i];
+ for (i = 0; i < ARRAY_SIZE(extcode_tab_us102); ++i)
+ keycodes[j++] = extcode_tab_us102[i];
idev = input_allocate_device();
- idev->name = "Tegra nvec keyboard";
- idev->phys = "i2c3_slave/nvec";
+ idev->name = "nvec keyboard";
+ idev->phys = "nvec";
idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_LED);
idev->ledbit[0] = BIT_MASK(LED_CAPSL);
idev->event = nvec_kbd_event;
@@ -89,12 +124,12 @@ int __init nvec_kbd_init(struct nvec_chip *nvec)
idev->keycodesize = sizeof(unsigned char);
idev->keycodemax = ARRAY_SIZE(keycodes);
- for( i = 0; i < ARRAY_SIZE(keycodes); ++i)
+ for (i = 0; i < ARRAY_SIZE(keycodes); ++i)
set_bit(keycodes[i], idev->keybit);
clear_bit(0, idev->keybit);
err = input_register_device(idev);
- if(err)
+ if (err)
goto fail;
keys_dev.input = idev;
@@ -114,9 +149,31 @@ int __init nvec_kbd_init(struct nvec_chip *nvec)
or until we have a sync write */
mdelay(1000);
+ /* Disable caps lock LED */
+ nvec_write_async(nvec, led_off, sizeof(led_off));
+
return 0;
fail:
input_free_device(idev);
return err;
}
+
+static struct platform_driver nvec_kbd_driver = {
+ .probe = nvec_kbd_probe,
+ .driver = {
+ .name = "nvec-kbd",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init nvec_kbd_init(void)
+{
+ return platform_driver_register(&nvec_kbd_driver);
+}
+
+module_init(nvec_kbd_init);
+
+MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
+MODULE_DESCRIPTION("NVEC keyboard driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/nvec/nvec_power.c b/drivers/staging/nvec/nvec_power.c
index df164ad..dfa966f 100644
--- a/drivers/staging/nvec/nvec_power.c
+++ b/drivers/staging/nvec/nvec_power.c
@@ -1,3 +1,17 @@
+/*
+ * nvec_power: power supply driver for a NVIDIA compliant embedded controller
+ *
+ * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
+ *
+ * Authors: Ilya Petrov <ilya.muromec@gmail.com>
+ * Marc Dietrich <marvin24@gmx.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
@@ -5,10 +19,10 @@
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
+
#include "nvec.h"
-struct nvec_power
-{
+struct nvec_power {
struct notifier_block notifier;
struct delayed_work poller;
struct nvec_chip *nvec;
@@ -58,7 +72,8 @@ struct bat_response {
u8 length;
u8 sub_type;
u8 status;
- union { /* payload */
+ /* payload */
+ union {
char plc[30];
u16 plu;
s16 pls;
@@ -69,18 +84,17 @@ static struct power_supply nvec_bat_psy;
static struct power_supply nvec_psy;
static int nvec_power_notifier(struct notifier_block *nb,
- unsigned long event_type, void *data)
+ unsigned long event_type, void *data)
{
- struct nvec_power *power = container_of(nb, struct nvec_power, notifier);
+ struct nvec_power *power =
+ container_of(nb, struct nvec_power, notifier);
struct bat_response *res = (struct bat_response *)data;
if (event_type != NVEC_SYS)
return NOTIFY_DONE;
- if(res->sub_type == 0)
- {
- if (power->on != res->plu)
- {
+ if (res->sub_type == 0) {
+ if (power->on != res->plu) {
power->on = res->plu;
power_supply_changed(&nvec_psy);
}
@@ -89,8 +103,7 @@ static int nvec_power_notifier(struct notifier_block *nb,
return NOTIFY_OK;
}
-static const int bat_init[] =
-{
+static const int bat_init[] = {
LAST_FULL_CHARGE_CAPACITY, DESIGN_CAPACITY, CRITICAL_CAPACITY,
MANUFACTURER, MODEL, TYPE,
};
@@ -100,116 +113,115 @@ static void get_bat_mfg_data(struct nvec_power *power)
int i;
char buf[] = { '\x02', '\x00' };
- for (i = 0; i < ARRAY_SIZE(bat_init); i++)
- {
+ for (i = 0; i < ARRAY_SIZE(bat_init); i++) {
buf[1] = bat_init[i];
nvec_write_async(power->nvec, buf, 2);
}
}
static int nvec_power_bat_notifier(struct notifier_block *nb,
- unsigned long event_type, void *data)
+ unsigned long event_type, void *data)
{
- struct nvec_power *power = container_of(nb, struct nvec_power, notifier);
+ struct nvec_power *power =
+ container_of(nb, struct nvec_power, notifier);
struct bat_response *res = (struct bat_response *)data;
int status_changed = 0;
if (event_type != NVEC_BAT)
return NOTIFY_DONE;
- switch(res->sub_type)
- {
- case SLOT_STATUS:
- if (res->plc[0] & 1)
- {
- if (power->bat_present == 0)
- {
- status_changed = 1;
- get_bat_mfg_data(power);
- }
-
- power->bat_present = 1;
-
- switch ((res->plc[0] >> 1) & 3)
- {
- case 0:
- power->bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
- break;
- case 1:
- power->bat_status = POWER_SUPPLY_STATUS_CHARGING;
- break;
- case 2:
- power->bat_status = POWER_SUPPLY_STATUS_DISCHARGING;
- break;
- default:
- power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
- }
- } else {
- if (power->bat_present == 1)
- status_changed = 1;
-
- power->bat_present = 0;
+ switch (res->sub_type) {
+ case SLOT_STATUS:
+ if (res->plc[0] & 1) {
+ if (power->bat_present == 0) {
+ status_changed = 1;
+ get_bat_mfg_data(power);
+ }
+
+ power->bat_present = 1;
+
+ switch ((res->plc[0] >> 1) & 3) {
+ case 0:
+ power->bat_status =
+ POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case 1:
+ power->bat_status =
+ POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case 2:
+ power->bat_status =
+ POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ default:
power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
}
- power->bat_cap = res->plc[1];
- if (status_changed)
- power_supply_changed(&nvec_bat_psy);
- break;
- case VOLTAGE:
- power->bat_voltage_now = res->plu * 1000;
- break;
- case TIME_REMAINING:
- power->time_remain = res->plu * 3600;
- break;
- case CURRENT:
- power->bat_current_now = res->pls * 1000;
- break;
- case AVERAGE_CURRENT:
- power->bat_current_avg = res->pls * 1000;
- break;
- case CAPACITY_REMAINING:
- power->capacity_remain = res->plu * 1000;
- break;
- case LAST_FULL_CHARGE_CAPACITY:
- power->charge_last_full = res->plu * 1000;
- break;
- case DESIGN_CAPACITY:
- power->charge_full_design = res->plu * 1000;
- break;
- case CRITICAL_CAPACITY:
- power->critical_capacity = res->plu * 1000;
- break;
- case TEMPERATURE:
- power->bat_temperature = res->plu - 2732;
- break;
- case MANUFACTURER:
- memcpy(power->bat_manu, &res->plc, res->length-2);
- power->bat_model[res->length-2] = '\0';
- break;
- case MODEL:
- memcpy(power->bat_model, &res->plc, res->length-2);
- power->bat_model[res->length-2] = '\0';
- break;
- case TYPE:
- memcpy(power->bat_type, &res->plc, res->length-2);
- power->bat_type[res->length-2] = '\0';
- /* this differs a little from the spec
- fill in more if you find some */
- if (!strncmp(power->bat_type, "Li", 30))
- power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
- else
- power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
- break;
- default:
- return NOTIFY_STOP;
+ } else {
+ if (power->bat_present == 1)
+ status_changed = 1;
+
+ power->bat_present = 0;
+ power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
+ }
+ power->bat_cap = res->plc[1];
+ if (status_changed)
+ power_supply_changed(&nvec_bat_psy);
+ break;
+ case VOLTAGE:
+ power->bat_voltage_now = res->plu * 1000;
+ break;
+ case TIME_REMAINING:
+ power->time_remain = res->plu * 3600;
+ break;
+ case CURRENT:
+ power->bat_current_now = res->pls * 1000;
+ break;
+ case AVERAGE_CURRENT:
+ power->bat_current_avg = res->pls * 1000;
+ break;
+ case CAPACITY_REMAINING:
+ power->capacity_remain = res->plu * 1000;
+ break;
+ case LAST_FULL_CHARGE_CAPACITY:
+ power->charge_last_full = res->plu * 1000;
+ break;
+ case DESIGN_CAPACITY:
+ power->charge_full_design = res->plu * 1000;
+ break;
+ case CRITICAL_CAPACITY:
+ power->critical_capacity = res->plu * 1000;
+ break;
+ case TEMPERATURE:
+ power->bat_temperature = res->plu - 2732;
+ break;
+ case MANUFACTURER:
+ memcpy(power->bat_manu, &res->plc, res->length - 2);
+ power->bat_model[res->length - 2] = '\0';
+ break;
+ case MODEL:
+ memcpy(power->bat_model, &res->plc, res->length - 2);
+ power->bat_model[res->length - 2] = '\0';
+ break;
+ case TYPE:
+ memcpy(power->bat_type, &res->plc, res->length - 2);
+ power->bat_type[res->length - 2] = '\0';
+ /* this differs a little from the spec
+ fill in more if you find some */
+ if (!strncmp(power->bat_type, "Li", 30))
+ power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
+ else
+ power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+ break;
+ default:
+ return NOTIFY_STOP;
}
return NOTIFY_STOP;
}
static int nvec_power_get_property(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
+ enum power_supply_property psp,
+ union power_supply_propval *val)
{
struct nvec_power *power = dev_get_drvdata(psy->dev->parent);
switch (psp) {
@@ -223,61 +235,60 @@ static int nvec_power_get_property(struct power_supply *psy,
}
static int nvec_battery_get_property(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
+ enum power_supply_property psp,
+ union power_supply_propval *val)
{
struct nvec_power *power = dev_get_drvdata(psy->dev->parent);
- switch(psp)
- {
- case POWER_SUPPLY_PROP_STATUS:
- val->intval = power->bat_status;
- break;
- case POWER_SUPPLY_PROP_CAPACITY:
- val->intval = power->bat_cap;
- break;
- case POWER_SUPPLY_PROP_PRESENT:
- val->intval = power->bat_present;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- val->intval = power->bat_voltage_now;
- break;
- case POWER_SUPPLY_PROP_CURRENT_NOW:
- val->intval = power->bat_current_now;
- break;
- case POWER_SUPPLY_PROP_CURRENT_AVG:
- val->intval = power->bat_current_avg;
- break;
- case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
- val->intval = power->time_remain;
- break;
- case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
- val->intval = power->charge_full_design;
- break;
- case POWER_SUPPLY_PROP_CHARGE_FULL:
- val->intval = power->charge_last_full;
- break;
- case POWER_SUPPLY_PROP_CHARGE_EMPTY:
- val->intval = power->critical_capacity;
- break;
- case POWER_SUPPLY_PROP_CHARGE_NOW:
- val->intval = power->capacity_remain;
- break;
- case POWER_SUPPLY_PROP_TEMP:
- val->intval = power->bat_temperature;
- break;
- case POWER_SUPPLY_PROP_MANUFACTURER:
- val->strval = power->bat_manu;
- break;
- case POWER_SUPPLY_PROP_MODEL_NAME:
- val->strval = power->bat_model;
- break;
- case POWER_SUPPLY_PROP_TECHNOLOGY:
- val->intval = power->bat_type_enum;
- break;
- default:
- return -EINVAL;
- }
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = power->bat_status;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = power->bat_cap;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = power->bat_present;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = power->bat_voltage_now;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ val->intval = power->bat_current_now;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ val->intval = power->bat_current_avg;
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
+ val->intval = power->time_remain;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+ val->intval = power->charge_full_design;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ val->intval = power->charge_last_full;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_EMPTY:
+ val->intval = power->critical_capacity;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ val->intval = power->capacity_remain;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ val->intval = power->bat_temperature;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = power->bat_manu;
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = power->bat_model;
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = power->bat_type_enum;
+ break;
+ default:
+ return -EINVAL;
+ }
return 0;
}
@@ -310,11 +321,11 @@ static char *nvec_power_supplied_to[] = {
};
static struct power_supply nvec_bat_psy = {
- .name = "battery",
- .type = POWER_SUPPLY_TYPE_BATTERY,
- .properties = nvec_battery_props,
- .num_properties = ARRAY_SIZE(nvec_battery_props),
- .get_property = nvec_battery_get_property,
+ .name = "battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = nvec_battery_props,
+ .num_properties = ARRAY_SIZE(nvec_battery_props),
+ .get_property = nvec_battery_get_property,
};
static struct power_supply nvec_psy = {
@@ -327,9 +338,8 @@ static struct power_supply nvec_psy = {
.get_property = nvec_power_get_property,
};
-static int counter = 0;
-static int const bat_iter[] =
-{
+static int counter;
+static int const bat_iter[] = {
SLOT_STATUS, VOLTAGE, CURRENT, CAPACITY_REMAINING,
#ifdef EC_FULL_DIAG
AVERAGE_CURRENT, TEMPERATURE, TIME_REMAINING,
@@ -340,7 +350,7 @@ static void nvec_power_poll(struct work_struct *work)
{
char buf[] = { '\x01', '\x00' };
struct nvec_power *power = container_of(work, struct nvec_power,
- poller.work);
+ poller.work);
if (counter >= ARRAY_SIZE(bat_iter))
counter = 0;
@@ -351,19 +361,18 @@ static void nvec_power_poll(struct work_struct *work)
/* select a battery request function via round robin
doing it all at once seems to overload the power supply */
- buf[0] = '\x02'; /* battery */
- buf[1] = bat_iter[counter++];
+ buf[0] = '\x02'; /* battery */
+ buf[1] = bat_iter[counter++];
nvec_write_async(power->nvec, buf, 2);
-// printk("%02x %02x\n", buf[0], buf[1]);
-
schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(5000));
};
static int __devinit nvec_power_probe(struct platform_device *pdev)
{
struct power_supply *psy;
- struct nvec_power *power = kzalloc(sizeof(struct nvec_power), GFP_NOWAIT);
+ struct nvec_power *power =
+ kzalloc(sizeof(struct nvec_power), GFP_NOWAIT);
struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
dev_set_drvdata(&pdev->dev, power);
@@ -381,7 +390,7 @@ static int __devinit nvec_power_probe(struct platform_device *pdev)
case BAT:
psy = &nvec_bat_psy;
- power->notifier.notifier_call = nvec_power_bat_notifier;
+ power->notifier.notifier_call = nvec_power_bat_notifier;
break;
default:
kfree(power);
@@ -398,14 +407,13 @@ static int __devinit nvec_power_probe(struct platform_device *pdev)
static struct platform_driver nvec_power_driver = {
.probe = nvec_power_probe,
-// .remove = __devexit_p(nvec_power_remove),
.driver = {
- .name = "nvec-power",
- .owner = THIS_MODULE,
- }
+ .name = "nvec-power",
+ .owner = THIS_MODULE,
+ }
};
-static int __init nvec_power_init(void)
+static int __init nvec_power_init(void)
{
return platform_driver_register(&nvec_power_driver);
}
diff --git a/drivers/staging/nvec/nvec_ps2.c b/drivers/staging/nvec/nvec_ps2.c
index 6bb9430..742f5cc 100644
--- a/drivers/staging/nvec/nvec_ps2.c
+++ b/drivers/staging/nvec/nvec_ps2.c
@@ -1,14 +1,33 @@
+/*
+ * nvec_ps2: mouse driver for a NVIDIA compliant embedded controller
+ *
+ * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
+ *
+ * Authors: Pierre-Hugues Husson <phhusson@free.fr>
+ * Ilya Petrov <ilya.muromec@gmail.com>
+ * Marc Dietrich <marvin24@gmx.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/module.h>
#include <linux/slab.h>
#include <linux/serio.h>
#include <linux/delay.h>
+#include <linux/platform_device.h>
+
#include "nvec.h"
-#define START_STREAMING {'\x06','\x03','\x01'}
-#define STOP_STREAMING {'\x06','\x04'}
-#define SEND_COMMAND {'\x06','\x01','\xf4','\x01'}
+#define START_STREAMING {'\x06', '\x03', '\x04'}
+#define STOP_STREAMING {'\x06', '\x04'}
+#define SEND_COMMAND {'\x06', '\x01', '\xf4', '\x01'}
-struct nvec_ps2
-{
+static const unsigned char MOUSE_RESET[] = {'\x06', '\x01', '\xff', '\x03'};
+
+struct nvec_ps2 {
struct serio *ser_dev;
struct notifier_block notifier;
struct nvec_chip *nvec;
@@ -19,8 +38,7 @@ static struct nvec_ps2 ps2_dev;
static int ps2_startstreaming(struct serio *ser_dev)
{
unsigned char buf[] = START_STREAMING;
- nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
- return 0;
+ return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
}
static void ps2_stopstreaming(struct serio *ser_dev)
@@ -29,12 +47,6 @@ static void ps2_stopstreaming(struct serio *ser_dev)
nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
}
-/* is this really needed?
-static void nvec_resp_handler(unsigned char *data) {
- serio_interrupt(ser_dev, data[4], 0);
-}
-*/
-
static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
{
unsigned char buf[] = SEND_COMMAND;
@@ -42,52 +54,49 @@ static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
buf[2] = cmd & 0xff;
dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
- nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
-
- return 0;
+ return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
}
static int nvec_ps2_notifier(struct notifier_block *nb,
- unsigned long event_type, void *data)
+ unsigned long event_type, void *data)
{
int i;
unsigned char *msg = (unsigned char *)data;
switch (event_type) {
- case NVEC_PS2_EVT:
- serio_interrupt(ps2_dev.ser_dev, msg[2], 0);
- return NOTIFY_STOP;
-
- case NVEC_PS2:
- if (msg[2] == 1)
- for(i = 0; i < (msg[1] - 2); i++)
- serio_interrupt(ps2_dev.ser_dev, msg[i+4], 0);
- else if (msg[1] != 2) /* !ack */
- {
- printk("nvec_ps2: unhandled mouse event ");
- for(i = 0; i <= (msg[1]+1); i++)
- printk("%02x ", msg[i]);
- printk(".\n");
- }
-
- return NOTIFY_STOP;
+ case NVEC_PS2_EVT:
+ for (i = 0; i < msg[1]; i++)
+ serio_interrupt(ps2_dev.ser_dev, msg[2 + i], 0);
+ return NOTIFY_STOP;
+
+ case NVEC_PS2:
+ if (msg[2] == 1)
+ for (i = 0; i < (msg[1] - 2); i++)
+ serio_interrupt(ps2_dev.ser_dev, msg[i + 4], 0);
+ else if (msg[1] != 2) { /* !ack */
+ print_hex_dump(KERN_WARNING, "unhandled mouse event: ",
+ DUMP_PREFIX_NONE, 16, 1,
+ msg, msg[1] + 2, true);
+ }
+
+ return NOTIFY_STOP;
}
return NOTIFY_DONE;
}
-
-int __init nvec_ps2(struct nvec_chip *nvec)
+static int __devinit nvec_mouse_probe(struct platform_device *pdev)
{
+ struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
struct serio *ser_dev = kzalloc(sizeof(struct serio), GFP_KERNEL);
- ser_dev->id.type=SERIO_8042;
- ser_dev->write=ps2_sendcommand;
- ser_dev->open=ps2_startstreaming;
- ser_dev->close=ps2_stopstreaming;
+ ser_dev->id.type = SERIO_8042;
+ ser_dev->write = ps2_sendcommand;
+ ser_dev->open = ps2_startstreaming;
+ ser_dev->close = ps2_stopstreaming;
- strlcpy(ser_dev->name, "NVEC PS2", sizeof(ser_dev->name));
- strlcpy(ser_dev->phys, "NVEC I2C slave", sizeof(ser_dev->phys));
+ strlcpy(ser_dev->name, "nvec mouse", sizeof(ser_dev->name));
+ strlcpy(ser_dev->phys, "nvec", sizeof(ser_dev->phys));
ps2_dev.ser_dev = ser_dev;
ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
@@ -97,7 +106,26 @@ int __init nvec_ps2(struct nvec_chip *nvec)
serio_register_port(ser_dev);
/* mouse reset */
- nvec_write_async(nvec, "\x06\x01\xff\x03", 4);
+ nvec_write_async(nvec, MOUSE_RESET, 4);
return 0;
}
+
+static struct platform_driver nvec_mouse_driver = {
+ .probe = nvec_mouse_probe,
+ .driver = {
+ .name = "nvec-mouse",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init nvec_mouse_init(void)
+{
+ return platform_driver_register(&nvec_mouse_driver);
+}
+
+module_init(nvec_mouse_init);
+
+MODULE_DESCRIPTION("NVEC mouse driver");
+MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
+MODULE_LICENSE("GPL");
generated by cgit v1.1 at 2024-04-29 04:57:54 +0000