--- /dev/null
+What: /sys/bus/w1/devices/.../pio
+Date: May 2012
+Contact: Markus Franke <franm@hrz.tu-chemnitz.de>
+Description: read/write the contents of the two PIO's of the DS28E04-100
+ see Documentation/w1/slaves/w1_ds28e04 for detailed information
+Users: any user space application which wants to communicate with DS28E04-100
+
+
+
+What: /sys/bus/w1/devices/.../eeprom
+Date: May 2012
+Contact: Markus Franke <franm@hrz.tu-chemnitz.de>
+Description: read/write the contents of the EEPROM memory of the DS28E04-100
+ see Documentation/w1/slaves/w1_ds28e04 for detailed information
+Users: any user space application which wants to communicate with DS28E04-100
The output format consists of a prefix carrying the syslog
prefix including priority and facility, the 64 bit message
- sequence number and the monotonic timestamp in microseconds.
- The values are separated by a ','. Future extensions might
- add more comma separated values before the terminating ';'.
- Unknown values should be gracefully ignored.
+ sequence number and the monotonic timestamp in microseconds,
+ and a flag field. All fields are separated by a ','.
+
+ Future extensions might add more comma separated values before
+ the terminating ';'. Unknown fields and values should be
+ gracefully ignored.
The human readable text string starts directly after the ';'
and is terminated by a '\n'. Untrusted values derived from
hardware or other facilities are printed, therefore
- all non-printable characters in the log message are escaped
- by "\x00" C-style hex encoding.
+ all non-printable characters and '\' itself in the log message
+ are escaped by "\x00" C-style hex encoding.
A line starting with ' ', is a continuation line, adding
key/value pairs to the log message, which provide the machine
userspace.
Example:
- 7,160,424069;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)
+ 7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)
SUBSYSTEM=acpi
DEVICE=+acpi:PNP0A03:00
- 6,339,5140900;NET: Registered protocol family 10
- 30,340,5690716;udevd[80]: starting version 181
+ 6,339,5140900,-;NET: Registered protocol family 10
+ 30,340,5690716,-;udevd[80]: starting version 181
The DEVICE= key uniquely identifies devices the following way:
b12:8 - block dev_t
n8 - netdev ifindex
+sound:card0 - subsystem:devname
+ The flags field carries '-' by default. A 'c' indicates a
+ fragment of a line. All following fragments are flagged with
+ '+'. Note, that these hints about continuation lines are not
+ neccessarily correct, and the stream could be interleaved with
+ unrelated messages, but merging the lines in the output
+ usually produces better human readable results. A similar
+ logic is used internally when messages are printed to the
+ console, /proc/kmsg or the syslog() syscall.
+
Users: dmesg(1), userspace kernel log consumers
-Everything you ever wanted to know about Linux 2.6 -stable releases.
+Everything you ever wanted to know about Linux -stable releases.
Rules on what kind of patches are accepted, and which ones are not, into the
"-stable" tree:
cherry-picked than this can be specified in the following format in
the sign-off area:
- Cc: <stable@vger.kernel.org> # .32.x: a1f84a3: sched: Check for idle
- Cc: <stable@vger.kernel.org> # .32.x: 1b9508f: sched: Rate-limit newidle
- Cc: <stable@vger.kernel.org> # .32.x: fd21073: sched: Fix affinity logic
- Cc: <stable@vger.kernel.org> # .32.x
+ Cc: <stable@vger.kernel.org> # 3.3.x: a1f84a3: sched: Check for idle
+ Cc: <stable@vger.kernel.org> # 3.3.x: 1b9508f: sched: Rate-limit newidle
+ Cc: <stable@vger.kernel.org> # 3.3.x: fd21073: sched: Fix affinity logic
+ Cc: <stable@vger.kernel.org> # 3.3.x
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The tag sequence has the meaning of:
security kernel team, and not go through the normal review cycle.
Contact the kernel security team for more details on this procedure.
+Trees:
+
+ - The queues of patches, for both completed versions and in progress
+ versions can be found at:
+ http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git
+ - The finalized and tagged releases of all stable kernels can be found
+ in separate branches per version at:
+ http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git
+
Review committee:
--- /dev/null
+Kernel driver w1_ds28e04
+========================
+
+Supported chips:
+ * Maxim DS28E04-100 4096-Bit Addressable 1-Wire EEPROM with PIO
+
+supported family codes:
+ W1_FAMILY_DS28E04 0x1C
+
+Author: Markus Franke, <franke.m@sebakmt.com> <franm@hrz.tu-chemnitz.de>
+
+Description
+-----------
+
+Support is provided through the sysfs files "eeprom" and "pio". CRC checking
+during memory accesses can optionally be enabled/disabled via the device
+attribute "crccheck". The strong pull-up can optionally be enabled/disabled
+via the module parameter "w1_strong_pullup".
+
+Memory Access
+
+ A read operation on the "eeprom" file reads the given amount of bytes
+ from the EEPROM of the DS28E04.
+
+ A write operation on the "eeprom" file writes the given byte sequence
+ to the EEPROM of the DS28E04. If CRC checking mode is enabled only
+ fully alligned blocks of 32 bytes with valid CRC16 values (in bytes 30
+ and 31) are allowed to be written.
+
+PIO Access
+
+ The 2 PIOs of the DS28E04-100 are accessible via the "pio" sysfs file.
+
+ The current status of the PIO's is returned as an 8 bit value. Bit 0/1
+ represent the state of PIO_0/PIO_1. Bits 2..7 do not care. The PIO's are
+ driven low-active, i.e. the driver delivers/expects low-active values.
S: Supported
F: security/integrity/evm/
+EXTERNAL CONNECTOR SUBSYSTEM (EXTCON)
+M: MyungJoo Ham <myungjoo.ham@samsung.com>
+M: Chanwoo Choi <cw00.choi@samsung.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: drivers/extcon/
+F: Documentation/extcon/
+
EXYNOS DP DRIVER
M: Jingoo Han <jg1.han@samsung.com>
L: linux-fbdev@vger.kernel.org
}
}
- kobject_uevent(&priv->kobj, KOBJ_ADD);
return 0;
out_unregister:
}
EXPORT_SYMBOL(dev_driver_string);
-#define to_dev(obj) container_of(obj, struct device, kobj)
#define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)
static ssize_t dev_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct device_attribute *dev_attr = to_dev_attr(attr);
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
ssize_t ret = -EIO;
if (dev_attr->show)
const char *buf, size_t count)
{
struct device_attribute *dev_attr = to_dev_attr(attr);
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
ssize_t ret = -EIO;
if (dev_attr->store)
*/
static void device_release(struct kobject *kobj)
{
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
struct device_private *p = dev->p;
if (dev->release)
static const void *device_namespace(struct kobject *kobj)
{
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
const void *ns = NULL;
if (dev->class && dev->class->ns_type)
struct kobj_type *ktype = get_ktype(kobj);
if (ktype == &device_ktype) {
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
if (dev->bus)
return 1;
if (dev->class)
static const char *dev_uevent_name(struct kset *kset, struct kobject *kobj)
{
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
if (dev->bus)
return dev->bus->name;
static int dev_uevent(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env)
{
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
int retval = 0;
/* add device node properties if present */
*/
struct device *get_device(struct device *dev)
{
- return dev ? to_dev(kobject_get(&dev->kobj)) : NULL;
+ return dev ? kobj_to_dev(kobject_get(&dev->kobj)) : NULL;
}
/**
set_dev_node(dev, dev_to_node(new_parent));
}
- if (!dev->class)
- goto out_put;
- error = device_move_class_links(dev, old_parent, new_parent);
- if (error) {
- /* We ignore errors on cleanup since we're hosed anyway... */
- device_move_class_links(dev, new_parent, old_parent);
- if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
- if (new_parent)
- klist_remove(&dev->p->knode_parent);
- dev->parent = old_parent;
- if (old_parent) {
- klist_add_tail(&dev->p->knode_parent,
- &old_parent->p->klist_children);
- set_dev_node(dev, dev_to_node(old_parent));
+ if (dev->class) {
+ error = device_move_class_links(dev, old_parent, new_parent);
+ if (error) {
+ /* We ignore errors on cleanup since we're hosed anyway... */
+ device_move_class_links(dev, new_parent, old_parent);
+ if (!kobject_move(&dev->kobj, &old_parent->kobj)) {
+ if (new_parent)
+ klist_remove(&dev->p->knode_parent);
+ dev->parent = old_parent;
+ if (old_parent) {
+ klist_add_tail(&dev->p->knode_parent,
+ &old_parent->p->klist_children);
+ set_dev_node(dev, dev_to_node(old_parent));
+ }
}
+ cleanup_glue_dir(dev, new_parent_kobj);
+ put_device(new_parent);
+ goto out;
}
- cleanup_glue_dir(dev, new_parent_kobj);
- put_device(new_parent);
- goto out;
}
switch (dpm_order) {
case DPM_ORDER_NONE:
device_pm_move_last(dev);
break;
}
-out_put:
+
put_device(old_parent);
out:
device_pm_unlock();
while (!list_empty(&devices_kset->list)) {
dev = list_entry(devices_kset->list.prev, struct device,
kobj.entry);
+
+ /*
+ * hold reference count of device's parent to
+ * prevent it from being freed because parent's
+ * lock is to be held
+ */
+ get_device(dev->parent);
get_device(dev);
/*
* Make sure the device is off the kset list, in the
list_del_init(&dev->kobj.entry);
spin_unlock(&devices_kset->list_lock);
+ /* hold lock to avoid race with probe/release */
+ if (dev->parent)
+ device_lock(dev->parent);
+ device_lock(dev);
+
/* Don't allow any more runtime suspends */
pm_runtime_get_noresume(dev);
pm_runtime_barrier(dev);
dev_dbg(dev, "shutdown\n");
dev->driver->shutdown(dev);
}
+
+ device_unlock(dev);
+ if (dev->parent)
+ device_unlock(dev->parent);
+
put_device(dev);
+ put_device(dev->parent);
spin_lock(&devices_kset->list_lock);
}
* manipulate the deferred list
*/
mutex_unlock(&deferred_probe_mutex);
+
+ /*
+ * Force the device to the end of the dpm_list since
+ * the PM code assumes that the order we add things to
+ * the list is a good order for suspend but deferred
+ * probe makes that very unsafe.
+ */
+ device_pm_lock();
+ device_pm_move_last(dev);
+ device_pm_unlock();
+
dev_dbg(dev, "Retrying from deferred list\n");
bus_probe_device(dev);
+
mutex_lock(&deferred_probe_mutex);
put_device(dev);
devres_release_all(dev);
driver_sysfs_remove(dev);
dev->driver = NULL;
+ dev_set_drvdata(dev, NULL);
if (ret == -EPROBE_DEFER) {
/* Driver requested deferred probing */
pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
drv->bus->name, __func__, dev_name(dev), drv->name);
- pm_runtime_get_noresume(dev);
pm_runtime_barrier(dev);
ret = really_probe(dev, drv);
- pm_runtime_put_sync(dev);
+ pm_runtime_idle(dev);
return ret;
}
ret = 0;
}
} else {
- pm_runtime_get_noresume(dev);
ret = bus_for_each_drv(dev->bus, NULL, dev, __device_attach);
- pm_runtime_put_sync(dev);
+ pm_runtime_idle(dev);
}
out_unlock:
device_unlock(dev);
drv->remove(dev);
devres_release_all(dev);
dev->driver = NULL;
+ dev_set_drvdata(dev, NULL);
klist_remove(&dev->p->knode_driver);
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
/**
* dma_buf_vunmap - Unmap a vmap obtained by dma_buf_vmap.
* @dmabuf: [in] buffer to vunmap
+ * @vaddr: [in] vmap to vunmap
*/
void dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr)
{
* @vma: vm_area for the userspace memory
* @vaddr: cpu address returned by dma_alloc_from_coherent
* @size: size of the memory buffer allocated by dma_alloc_from_coherent
+ * @ret: result from remap_pfn_range()
*
* This checks whether the memory was allocated from the per-device
* coherent memory pool and if so, maps that memory to the provided vma.
if (ret)
return ret;
ret = driver_add_groups(drv, drv->groups);
- if (ret)
+ if (ret) {
bus_remove_driver(drv);
+ return ret;
+ }
+ kobject_uevent(&drv->p->kobj, KOBJ_ADD);
+
return ret;
}
EXPORT_SYMBOL_GPL(driver_register);
#include <linux/slab.h>
#include <linux/sched.h>
-#define to_dev(obj) container_of(obj, struct device, kobj)
-
MODULE_AUTHOR("Manuel Estrada Sainz");
MODULE_DESCRIPTION("Multi purpose firmware loading support");
MODULE_LICENSE("GPL");
struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
struct firmware_priv *fw_priv = to_firmware_priv(dev);
struct firmware *fw;
ssize_t ret_count;
struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
- struct device *dev = to_dev(kobj);
+ struct device *dev = kobj_to_dev(kobj);
struct firmware_priv *fw_priv = to_firmware_priv(dev);
struct firmware *fw;
ssize_t retval;
Say Y here to enable GPIO based extcon support. Note that GPIO
extcon supports single state per extcon instance.
+config EXTCON_MAX77693
+ tristate "MAX77693 EXTCON Support"
+ depends on MFD_MAX77693
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the MUIC device of
+ Maxim MAX77693 PMIC. The MAX77693 MUIC is a USB port accessory
+ detector and switch.
+
config EXTCON_MAX8997
tristate "MAX8997 EXTCON Support"
depends on MFD_MAX8997
Maxim MAX8997 PMIC. The MAX8997 MUIC is a USB port accessory
detector and switch.
+config EXTCON_ARIZONA
+ tristate "Wolfson Arizona EXTCON support"
+ depends on MFD_ARIZONA
+ help
+ Say Y here to enable support for external accessory detection
+ with Wolfson Arizona devices. These are audio CODECs with
+ advanced audio accessory detection support.
+
endif # MULTISTATE_SWITCH
obj-$(CONFIG_EXTCON) += extcon_class.o
obj-$(CONFIG_EXTCON_GPIO) += extcon_gpio.o
+obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
+obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
--- /dev/null
+/*
+ * extcon-arizona.c - Extcon driver Wolfson Arizona devices
+ *
+ * Copyright (C) 2012 Wolfson Microelectronics plc
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/extcon.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/pdata.h>
+#include <linux/mfd/arizona/registers.h>
+
+struct arizona_extcon_info {
+ struct device *dev;
+ struct arizona *arizona;
+ struct mutex lock;
+ struct regulator *micvdd;
+
+ int micd_mode;
+ const struct arizona_micd_config *micd_modes;
+ int micd_num_modes;
+
+ bool micd_reva;
+
+ bool mic;
+ bool detecting;
+ int jack_flips;
+
+ struct extcon_dev edev;
+};
+
+static const struct arizona_micd_config micd_default_modes[] = {
+ { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
+ { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
+};
+
+#define ARIZONA_CABLE_MECHANICAL 0
+#define ARIZONA_CABLE_MICROPHONE 1
+#define ARIZONA_CABLE_HEADPHONE 2
+
+static const char *arizona_cable[] = {
+ "Mechanical",
+ "Microphone",
+ "Headphone",
+ NULL,
+};
+
+static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
+{
+ struct arizona *arizona = info->arizona;
+
+ gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
+ info->micd_modes[mode].gpio);
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_SRC_MASK,
+ info->micd_modes[mode].bias);
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
+
+ info->micd_mode = mode;
+
+ dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
+}
+
+static void arizona_start_mic(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ bool change;
+ int ret;
+
+ info->detecting = true;
+ info->mic = false;
+ info->jack_flips = 0;
+
+ /* Microphone detection can't use idle mode */
+ pm_runtime_get(info->dev);
+
+ ret = regulator_enable(info->micvdd);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
+ ret);
+ }
+
+ if (info->micd_reva) {
+ regmap_write(arizona->regmap, 0x80, 0x3);
+ regmap_write(arizona->regmap, 0x294, 0);
+ regmap_write(arizona->regmap, 0x80, 0x0);
+ }
+
+ regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
+ &change);
+ if (!change) {
+ regulator_disable(info->micvdd);
+ pm_runtime_put_autosuspend(info->dev);
+ }
+}
+
+static void arizona_stop_mic(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ bool change;
+
+ regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, 0,
+ &change);
+
+ if (info->micd_reva) {
+ regmap_write(arizona->regmap, 0x80, 0x3);
+ regmap_write(arizona->regmap, 0x294, 2);
+ regmap_write(arizona->regmap, 0x80, 0x0);
+ }
+
+ if (change) {
+ regulator_disable(info->micvdd);
+ pm_runtime_put_autosuspend(info->dev);
+ }
+}
+
+static irqreturn_t arizona_micdet(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ unsigned int val;
+ int ret;
+
+ mutex_lock(&info->lock);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ dev_dbg(arizona->dev, "MICDET: %x\n", val);
+
+ if (!(val & ARIZONA_MICD_VALID)) {
+ dev_warn(arizona->dev, "Microphone detection state invalid\n");
+ mutex_unlock(&info->lock);
+ return IRQ_NONE;
+ }
+
+ /* Due to jack detect this should never happen */
+ if (!(val & ARIZONA_MICD_STS)) {
+ dev_warn(arizona->dev, "Detected open circuit\n");
+ info->detecting = false;
+ goto handled;
+ }
+
+ /* If we got a high impedence we should have a headset, report it. */
+ if (info->detecting && (val & 0x400)) {
+ ret = extcon_update_state(&info->edev,
+ 1 << ARIZONA_CABLE_MICROPHONE |
+ 1 << ARIZONA_CABLE_HEADPHONE,
+ 1 << ARIZONA_CABLE_MICROPHONE |
+ 1 << ARIZONA_CABLE_HEADPHONE);
+
+ if (ret != 0)
+ dev_err(arizona->dev, "Headset report failed: %d\n",
+ ret);
+
+ info->mic = true;
+ info->detecting = false;
+ goto handled;
+ }
+
+ /* If we detected a lower impedence during initial startup
+ * then we probably have the wrong polarity, flip it. Don't
+ * do this for the lowest impedences to speed up detection of
+ * plain headphones. If both polarities report a low
+ * impedence then give up and report headphones.
+ */
+ if (info->detecting && (val & 0x3f8)) {
+ info->jack_flips++;
+
+ if (info->jack_flips >= info->micd_num_modes) {
+ dev_dbg(arizona->dev, "Detected headphone\n");
+ info->detecting = false;
+ arizona_stop_mic(info);
+
+ ret = extcon_set_cable_state_(&info->edev,
+ ARIZONA_CABLE_HEADPHONE,
+ true);
+ if (ret != 0)
+ dev_err(arizona->dev,
+ "Headphone report failed: %d\n",
+ ret);
+ } else {
+ info->micd_mode++;
+ if (info->micd_mode == info->micd_num_modes)
+ info->micd_mode = 0;
+ arizona_extcon_set_mode(info, info->micd_mode);
+
+ info->jack_flips++;
+ }
+
+ goto handled;
+ }
+
+ /*
+ * If we're still detecting and we detect a short then we've
+ * got a headphone. Otherwise it's a button press, the
+ * button reporting is stubbed out for now.
+ */
+ if (val & 0x3fc) {
+ if (info->mic) {
+ dev_dbg(arizona->dev, "Mic button detected\n");
+
+ } else if (info->detecting) {
+ dev_dbg(arizona->dev, "Headphone detected\n");
+ info->detecting = false;
+ arizona_stop_mic(info);
+
+ ret = extcon_set_cable_state_(&info->edev,
+ ARIZONA_CABLE_HEADPHONE,
+ true);
+ if (ret != 0)
+ dev_err(arizona->dev,
+ "Headphone report failed: %d\n",
+ ret);
+ } else {
+ dev_warn(arizona->dev, "Button with no mic: %x\n",
+ val);
+ }
+ } else {
+ dev_dbg(arizona->dev, "Mic button released\n");
+ }
+
+handled:
+ pm_runtime_mark_last_busy(info->dev);
+ mutex_unlock(&info->lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t arizona_jackdet(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ unsigned int val;
+ int ret;
+
+ pm_runtime_get_sync(info->dev);
+
+ mutex_lock(&info->lock);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
+ ret);
+ mutex_unlock(&info->lock);
+ pm_runtime_put_autosuspend(info->dev);
+ return IRQ_NONE;
+ }
+
+ if (val & ARIZONA_JD1_STS) {
+ dev_dbg(arizona->dev, "Detected jack\n");
+ ret = extcon_set_cable_state_(&info->edev,
+ ARIZONA_CABLE_MECHANICAL, true);
+
+ if (ret != 0)
+ dev_err(arizona->dev, "Mechanical report failed: %d\n",
+ ret);
+
+ arizona_start_mic(info);
+ } else {
+ dev_dbg(arizona->dev, "Detected jack removal\n");
+
+ arizona_stop_mic(info);
+
+ ret = extcon_update_state(&info->edev, 0xffffffff, 0);
+ if (ret != 0)
+ dev_err(arizona->dev, "Removal report failed: %d\n",
+ ret);
+ }
+
+ mutex_unlock(&info->lock);
+
+ pm_runtime_mark_last_busy(info->dev);
+ pm_runtime_put_autosuspend(info->dev);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit arizona_extcon_probe(struct platform_device *pdev)
+{
+ struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
+ struct arizona_pdata *pdata;
+ struct arizona_extcon_info *info;
+ int ret, mode;
+
+ pdata = dev_get_platdata(arizona->dev);
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
+ if (IS_ERR(info->micvdd)) {
+ ret = PTR_ERR(info->micvdd);
+ dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
+ goto err;
+ }
+
+ mutex_init(&info->lock);
+ info->arizona = arizona;
+ info->dev = &pdev->dev;
+ info->detecting = true;
+ platform_set_drvdata(pdev, info);
+
+ switch (arizona->type) {
+ case WM5102:
+ switch (arizona->rev) {
+ case 0:
+ info->micd_reva = true;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ info->edev.name = "Headset Jack";
+ info->edev.supported_cable = arizona_cable;
+
+ ret = extcon_dev_register(&info->edev, arizona->dev);
+ if (ret < 0) {
+ dev_err(arizona->dev, "extcon_dev_regster() failed: %d\n",
+ ret);
+ goto err;
+ }
+
+ if (pdata->num_micd_configs) {
+ info->micd_modes = pdata->micd_configs;
+ info->micd_num_modes = pdata->num_micd_configs;
+ } else {
+ info->micd_modes = micd_default_modes;
+ info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
+ }
+
+ if (arizona->pdata.micd_pol_gpio > 0) {
+ if (info->micd_modes[0].gpio)
+ mode = GPIOF_OUT_INIT_HIGH;
+ else
+ mode = GPIOF_OUT_INIT_LOW;
+
+ ret = devm_gpio_request_one(&pdev->dev,
+ arizona->pdata.micd_pol_gpio,
+ mode,
+ "MICD polarity");
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
+ arizona->pdata.micd_pol_gpio, ret);
+ goto err_register;
+ }
+ }
+
+ arizona_extcon_set_mode(info, 0);
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_idle(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
+ "JACKDET rise", arizona_jackdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
+ ret);
+ goto err_register;
+ }
+
+ ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
+ ret);
+ goto err_rise;
+ }
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
+ "JACKDET fall", arizona_jackdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
+ goto err_rise_wake;
+ }
+
+ ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
+ ret);
+ goto err_fall;
+ }
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
+ "MICDET", arizona_micdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
+ goto err_fall_wake;
+ }
+
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_STARTTIME_MASK |
+ ARIZONA_MICD_RATE_MASK,
+ 7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT |
+ 8 << ARIZONA_MICD_RATE_SHIFT);
+
+ arizona_clk32k_enable(arizona);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_JD1_DB, ARIZONA_JD1_DB);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
+ ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
+
+ pm_runtime_put(&pdev->dev);
+
+ return 0;
+
+err_fall_wake:
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
+err_fall:
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
+err_rise_wake:
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
+err_rise:
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
+err_register:
+ pm_runtime_disable(&pdev->dev);
+ extcon_dev_unregister(&info->edev);
+err:
+ return ret;
+}
+
+static int __devexit arizona_extcon_remove(struct platform_device *pdev)
+{
+ struct arizona_extcon_info *info = platform_get_drvdata(pdev);
+ struct arizona *arizona = info->arizona;
+
+ pm_runtime_disable(&pdev->dev);
+
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
+ arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
+ ARIZONA_JD1_ENA, 0);
+ arizona_clk32k_disable(arizona);
+ extcon_dev_unregister(&info->edev);
+
+ return 0;
+}
+
+static struct platform_driver arizona_extcon_driver = {
+ .driver = {
+ .name = "arizona-extcon",
+ .owner = THIS_MODULE,
+ },
+ .probe = arizona_extcon_probe,
+ .remove = __devexit_p(arizona_extcon_remove),
+};
+
+module_platform_driver(arizona_extcon_driver);
+
+MODULE_DESCRIPTION("Arizona Extcon driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-arizona");
--- /dev/null
+/*
+ * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
+ *
+ * Copyright (C) 2012 Samsung Electrnoics
+ * Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/extcon.h>
+#include <linux/regmap.h>
+#include <linux/irqdomain.h>
+
+#define DEV_NAME "max77693-muic"
+
+/* MAX77693 MUIC - STATUS1~3 Register */
+#define STATUS1_ADC_SHIFT (0)
+#define STATUS1_ADCLOW_SHIFT (5)
+#define STATUS1_ADCERR_SHIFT (6)
+#define STATUS1_ADC1K_SHIFT (7)
+#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
+#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
+#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
+#define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT)
+
+#define STATUS2_CHGTYP_SHIFT (0)
+#define STATUS2_CHGDETRUN_SHIFT (3)
+#define STATUS2_DCDTMR_SHIFT (4)
+#define STATUS2_DXOVP_SHIFT (5)
+#define STATUS2_VBVOLT_SHIFT (6)
+#define STATUS2_VIDRM_SHIFT (7)
+#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
+#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
+#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
+#define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT)
+#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
+#define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT)
+
+#define STATUS3_OVP_SHIFT (2)
+#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
+
+/* MAX77693 CDETCTRL1~2 register */
+#define CDETCTRL1_CHGDETEN_SHIFT (0)
+#define CDETCTRL1_CHGTYPMAN_SHIFT (1)
+#define CDETCTRL1_DCDEN_SHIFT (2)
+#define CDETCTRL1_DCD2SCT_SHIFT (3)
+#define CDETCTRL1_CDDELAY_SHIFT (4)
+#define CDETCTRL1_DCDCPL_SHIFT (5)
+#define CDETCTRL1_CDPDET_SHIFT (7)
+#define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT)
+#define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT)
+#define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT)
+#define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT)
+#define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT)
+#define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT)
+#define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT)
+
+#define CDETCTRL2_VIDRMEN_SHIFT (1)
+#define CDETCTRL2_DXOVPEN_SHIFT (3)
+#define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT)
+#define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT)
+
+/* MAX77693 MUIC - CONTROL1~3 register */
+#define COMN1SW_SHIFT (0)
+#define COMP2SW_SHIFT (3)
+#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
+#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
+#define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
+#define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \
+ | (1 << COMN1SW_SHIFT))
+#define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \
+ | (2 << COMN1SW_SHIFT))
+#define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \
+ | (3 << COMN1SW_SHIFT))
+#define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \
+ | (0 << COMN1SW_SHIFT))
+
+#define CONTROL2_LOWPWR_SHIFT (0)
+#define CONTROL2_ADCEN_SHIFT (1)
+#define CONTROL2_CPEN_SHIFT (2)
+#define CONTROL2_SFOUTASRT_SHIFT (3)
+#define CONTROL2_SFOUTORD_SHIFT (4)
+#define CONTROL2_ACCDET_SHIFT (5)
+#define CONTROL2_USBCPINT_SHIFT (6)
+#define CONTROL2_RCPS_SHIFT (7)
+#define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT)
+#define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT)
+#define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT)
+#define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT)
+#define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT)
+#define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT)
+#define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT)
+#define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT)
+
+#define CONTROL3_JIGSET_SHIFT (0)
+#define CONTROL3_BTLDSET_SHIFT (2)
+#define CONTROL3_ADCDBSET_SHIFT (4)
+#define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT)
+#define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT)
+#define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT)
+
+enum max77693_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_5MS = 0,
+ ADC_DEBOUNCE_TIME_10MS,
+ ADC_DEBOUNCE_TIME_25MS,
+ ADC_DEBOUNCE_TIME_38_62MS,
+};
+
+struct max77693_muic_info {
+ struct device *dev;
+ struct max77693_dev *max77693;
+ struct extcon_dev *edev;
+ int prev_adc;
+ int prev_adc_gnd;
+ int prev_chg_type;
+ u8 status[2];
+
+ int irq;
+ struct work_struct irq_work;
+ struct mutex mutex;
+};
+
+enum max77693_muic_charger_type {
+ MAX77693_CHARGER_TYPE_NONE = 0,
+ MAX77693_CHARGER_TYPE_USB,
+ MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
+ MAX77693_CHARGER_TYPE_DEDICATED_CHG,
+ MAX77693_CHARGER_TYPE_APPLE_500MA,
+ MAX77693_CHARGER_TYPE_APPLE_1A_2A,
+ MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
+};
+
+/**
+ * struct max77693_muic_irq
+ * @irq: the index of irq list of MUIC device.
+ * @name: the name of irq.
+ * @virq: the virtual irq to use irq domain
+ */
+struct max77693_muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+static struct max77693_muic_irq muic_irqs[] = {
+ { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
+ { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
+ { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
+ { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
+ { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
+ { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
+ { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
+ { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
+ { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
+ { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
+ { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
+ { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
+ { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
+ { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
+ { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
+ { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
+};
+
+/* Define supported accessory type */
+enum max77693_muic_acc_type {
+ MAX77693_MUIC_ADC_GROUND = 0x0,
+ MAX77693_MUIC_ADC_SEND_END_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX77693_MUIC_ADC_RESERVED_ACC_1,
+ MAX77693_MUIC_ADC_RESERVED_ACC_2,
+ MAX77693_MUIC_ADC_RESERVED_ACC_3,
+ MAX77693_MUIC_ADC_RESERVED_ACC_4,
+ MAX77693_MUIC_ADC_RESERVED_ACC_5,
+ MAX77693_MUIC_ADC_CEA936_AUDIO,
+ MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX77693_MUIC_ADC_TTY_CONVERTER,
+ MAX77693_MUIC_ADC_UART_CABLE,
+ MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
+ MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
+ MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
+ MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
+ MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
+ MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
+ MAX77693_MUIC_ADC_OPEN,
+
+ /* The below accessories have same ADC value so ADCLow and
+ ADC1K bit is used to separate specific accessory */
+ MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, ADCLow:0, ADC1K:0 */
+ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */
+ MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */
+};
+
+/* MAX77693 MUIC device support below list of accessories(external connector) */
+const char *max77693_extcon_cable[] = {
+ [0] = "USB",
+ [1] = "USB-Host",
+ [2] = "TA",
+ [3] = "Fast-charger",
+ [4] = "Slow-charger",
+ [5] = "Charge-downstream",
+ [6] = "MHL",
+ [7] = "Audio-video-load",
+ [8] = "Audio-video-noload",
+ [9] = "JIG",
+
+ NULL,
+};
+
+static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
+ enum max77693_muic_adc_debounce_time time)
+{
+ int ret = 0;
+ u8 ctrl3;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max77693_read_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL3, &ctrl3);
+ ctrl3 &= ~CONTROL3_ADCDBSET_MASK;
+ ctrl3 |= (time << CONTROL3_ADCDBSET_SHIFT);
+
+ ret = max77693_write_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL3, ctrl3);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ ret = -EINVAL;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+};
+
+static int max77693_muic_set_path(struct max77693_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret = 0;
+ u8 ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CONTROL1_SW_OPEN;
+
+ ret = max77693_update_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ goto out;
+ }
+
+ if (attached)
+ ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max77693_update_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL2, ctrl2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ goto out;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+out:
+ return ret;
+}
+
+static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
+ bool attached)
+{
+ int ret = 0;
+ int type;
+ int adc, adc1k, adclow;
+
+ if (attached) {
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adclow = info->status[0] & STATUS1_ADCLOW_MASK;
+ adclow >>= STATUS1_ADCLOW_SHIFT;
+ adc1k = info->status[0] & STATUS1_ADC1K_MASK;
+ adc1k >>= STATUS1_ADC1K_SHIFT;
+
+ /**
+ * [0x1][ADCLow][ADC1K]
+ * [0x1 0 0 ] : USB_OTG
+ * [0x1 1 0 ] : Audio Video Cable with load
+ * [0x1 1 1 ] : MHL
+ */
+ type = ((0x1 << 8) | (adclow << 1) | adc1k);
+
+ /* Store previous ADC value to handle accessory
+ when accessory will be detached */
+ info->prev_adc = adc;
+ info->prev_adc_gnd = type;
+ } else
+ type = info->prev_adc_gnd;
+
+ switch (type) {
+ case MAX77693_MUIC_GND_USB_OTG:
+ /* USB_OTG */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "USB-Host", attached);
+ break;
+ case MAX77693_MUIC_GND_AV_CABLE_LOAD:
+ /* Audio Video Cable with load */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev,
+ "Audio-video-load", attached);
+ break;
+ case MAX77693_MUIC_GND_MHL_CABLE:
+ /* MHL */
+ extcon_set_cable_state(info->edev, "MHL", attached);
+ break;
+ default:
+ dev_err(info->dev, "faild to detect %s accessory\n",
+ attached ? "attached" : "detached");
+ dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
+ adc, adclow, adc1k);
+ ret = -EINVAL;
+ break;
+ }
+
+out:
+ return ret;
+}
+
+static int max77693_muic_adc_handler(struct max77693_muic_info *info,
+ int curr_adc, bool attached)
+{
+ int ret = 0;
+ int adc;
+
+ if (attached) {
+ /* Store ADC value to handle accessory
+ when accessory will be detached */
+ info->prev_adc = curr_adc;
+ adc = curr_adc;
+ } else
+ adc = info->prev_adc;
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
+ attached ? "attached" : "detached", curr_adc, info->prev_adc);
+
+ switch (adc) {
+ case MAX77693_MUIC_ADC_GROUND:
+ /* USB_OTG/MHL/Audio */
+ max77693_muic_adc_ground_handler(info, attached);
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
+ /* USB */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "USB", attached);
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
+ /* JIG */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "JIG", attached);
+ break;
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
+ /* Audio Video cable with no-load */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev,
+ "Audio-video-noload", attached);
+ break;
+ case MAX77693_MUIC_ADC_SEND_END_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_1:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_2:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_4:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_5:
+ case MAX77693_MUIC_ADC_CEA936_AUDIO:
+ case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX77693_MUIC_ADC_TTY_CONVERTER:
+ case MAX77693_MUIC_ADC_UART_CABLE:
+ case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
+ /* This accessory isn't used in general case if it is specially
+ needed to detect additional accessory, should implement
+ proper operation when this accessory is attached/detached. */
+ dev_info(info->dev,
+ "accessory is %s but it isn't used (adc:0x%x)\n",
+ attached ? "attached" : "detached", adc);
+ goto out;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (adc:0x%x)\n",
+ attached ? "attached" : "detached", adc);
+ ret = -EINVAL;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static int max77693_muic_chg_handler(struct max77693_muic_info *info,
+ int curr_chg_type, bool attached)
+{
+ int ret = 0;
+ int chg_type;
+
+ if (attached) {
+ /* Store previous charger type to control
+ when charger accessory will be detached */
+ info->prev_chg_type = curr_chg_type;
+ chg_type = curr_chg_type;
+ } else
+ chg_type = info->prev_chg_type;
+
+ dev_info(info->dev,
+ "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
+ attached ? "attached" : "detached",
+ curr_chg_type, info->prev_chg_type);
+
+ switch (chg_type) {
+ case MAX77693_CHARGER_TYPE_USB:
+ ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "USB", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_cable_state(info->edev,
+ "Charge-downstream", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ extcon_set_cable_state(info->edev, "TA", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_500MA:
+ extcon_set_cable_state(info->edev, "Slow-charger", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
+ extcon_set_cable_state(info->edev, "Fast-charger", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (chg_type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+ ret = -EINVAL;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static void max77693_muic_irq_work(struct work_struct *work)
+{
+ struct max77693_muic_info *info = container_of(work,
+ struct max77693_muic_info, irq_work);
+ int curr_adc, curr_chg_type;
+ int irq_type = -1;
+ int i, ret = 0;
+ bool attached = true;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
+ if (info->irq == muic_irqs[i].virq)
+ irq_type = muic_irqs[i].irq;
+
+ ret = max77693_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, 2, info->status);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ switch (irq_type) {
+ case MAX77693_MUIC_IRQ_INT1_ADC:
+ case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
+ case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
+ case MAX77693_MUIC_IRQ_INT1_ADC1K:
+ /* Handle all of accessory except for
+ type of charger accessory */
+ curr_adc = info->status[0] & STATUS1_ADC_MASK;
+ curr_adc >>= STATUS1_ADC_SHIFT;
+
+ /* Check accossory state which is either detached or attached */
+ if (curr_adc == MAX77693_MUIC_ADC_OPEN)
+ attached = false;
+
+ ret = max77693_muic_adc_handler(info, curr_adc, attached);
+ break;
+ case MAX77693_MUIC_IRQ_INT2_CHGTYP:
+ case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
+ case MAX77693_MUIC_IRQ_INT2_DCDTMR:
+ case MAX77693_MUIC_IRQ_INT2_DXOVP:
+ case MAX77693_MUIC_IRQ_INT2_VBVOLT:
+ case MAX77693_MUIC_IRQ_INT2_VIDRM:
+ /* Handle charger accessory */
+ curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ /* Check charger accossory state which
+ is either detached or attached */
+ if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
+ attached = false;
+
+ ret = max77693_muic_chg_handler(info, curr_chg_type, attached);
+ break;
+ case MAX77693_MUIC_IRQ_INT3_EOC:
+ case MAX77693_MUIC_IRQ_INT3_CGMBC:
+ case MAX77693_MUIC_IRQ_INT3_OVP:
+ case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
+ case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
+ case MAX77693_MUIC_IRQ_INT3_BAT_DET:
+ break;
+ default:
+ dev_err(info->dev, "muic interrupt: irq %d occurred\n",
+ irq_type);
+ break;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+
+ return;
+}
+
+static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
+{
+ struct max77693_muic_info *info = data;
+
+ info->irq = irq;
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static struct regmap_config max77693_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
+{
+ int ret = 0;
+ int adc, chg_type;
+
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = max77693_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, 2, info->status);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return -EINVAL;
+ }
+
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ if (adc != MAX77693_MUIC_ADC_OPEN) {
+ dev_info(info->dev,
+ "external connector is attached (adc:0x%02x)\n", adc);
+
+ ret = max77693_muic_adc_handler(info, adc, true);
+ if (ret < 0)
+ dev_err(info->dev, "failed to detect accessory\n");
+ goto out;
+ }
+
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type != MAX77693_CHARGER_TYPE_NONE) {
+ dev_info(info->dev,
+ "external connector is attached (chg_type:0x%x)\n",
+ chg_type);
+
+ max77693_muic_chg_handler(info, chg_type, true);
+ if (ret < 0)
+ dev_err(info->dev, "failed to detect charger accessory\n");
+ }
+
+out:
+ mutex_unlock(&info->mutex);
+ return ret;
+}
+
+static int __devinit max77693_muic_probe(struct platform_device *pdev)
+{
+ struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
+ struct max77693_muic_info *info;
+ int ret, i;
+ u8 id;
+
+ info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL);
+ if (!info) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err_kfree;
+ }
+ info->dev = &pdev->dev;
+ info->max77693 = max77693;
+ info->max77693->regmap_muic = regmap_init_i2c(info->max77693->muic,
+ &max77693_muic_regmap_config);
+ if (IS_ERR(info->max77693->regmap_muic)) {
+ ret = PTR_ERR(info->max77693->regmap_muic);
+ dev_err(max77693->dev,
+ "failed to allocate register map: %d\n", ret);
+ goto err_regmap;
+ }
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, max77693_muic_irq_work);
+
+ /* Support irq domain for MAX77693 MUIC device */
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
+ struct max77693_muic_irq *muic_irq = &muic_irqs[i];
+ int virq = 0;
+
+ virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
+ if (!virq)
+ goto err_irq;
+ muic_irq->virq = virq;
+
+ ret = request_threaded_irq(virq, NULL,
+ max77693_muic_irq_handler,
+ 0, muic_irq->name, info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed: irq request (IRQ: %d,"
+ " error :%d)\n",
+ muic_irq->irq, ret);
+
+ for (i = i - 1; i >= 0; i--)
+ free_irq(muic_irq->virq, info);
+ goto err_irq;
+ }
+ }
+
+ /* Initialize extcon device */
+ info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL);
+ if (!info->edev) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ ret = -ENOMEM;
+ goto err_irq;
+ }
+ info->edev->name = DEV_NAME;
+ info->edev->supported_cable = max77693_extcon_cable;
+ ret = extcon_dev_register(info->edev, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ goto err_extcon;
+ }
+
+ /* Check revision number of MUIC device*/
+ ret = max77693_read_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_ID, &id);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to read revision number\n");
+ goto err_extcon;
+ }
+ dev_info(info->dev, "device ID : 0x%x\n", id);
+
+ /* Set ADC debounce time */
+ max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /* Detect accessory on boot */
+ max77693_muic_detect_accessory(info);
+
+ return ret;
+
+err_extcon:
+ kfree(info->edev);
+err_irq:
+err_regmap:
+ kfree(info);
+err_kfree:
+ return ret;
+}
+
+static int __devexit max77693_muic_remove(struct platform_device *pdev)
+{
+ struct max77693_muic_info *info = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+ free_irq(muic_irqs[i].virq, info);
+ cancel_work_sync(&info->irq_work);
+ extcon_dev_unregister(info->edev);
+ kfree(info);
+
+ return 0;
+}
+
+static struct platform_driver max77693_muic_driver = {
+ .driver = {
+ .name = DEV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = max77693_muic_probe,
+ .remove = __devexit_p(max77693_muic_remove),
+};
+
+module_platform_driver(max77693_muic_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-max77693");
NULL,
};
-struct class *extcon_class;
+static struct class *extcon_class;
#if defined(CONFIG_ANDROID)
static struct class_compat *switch_class;
#endif /* CONFIG_ANDROID */
ret = extcon_dev_register(&extcon_data->edev, &pdev->dev);
if (ret < 0)
- goto err_extcon_dev_register;
+ return ret;
ret = gpio_request_one(extcon_data->gpio, GPIOF_DIR_IN, pdev->name);
if (ret < 0)
- goto err_request_gpio;
+ goto err;
INIT_DELAYED_WORK(&extcon_data->work, gpio_extcon_work);
extcon_data->irq = gpio_to_irq(extcon_data->gpio);
if (extcon_data->irq < 0) {
ret = extcon_data->irq;
- goto err_detect_irq_num_failed;
+ goto err;
}
ret = request_any_context_irq(extcon_data->irq, gpio_irq_handler,
pdata->irq_flags, pdev->name,
extcon_data);
if (ret < 0)
- goto err_request_irq;
+ goto err;
platform_set_drvdata(pdev, extcon_data);
/* Perform initial detection */
return 0;
-err_request_irq:
-err_detect_irq_num_failed:
- gpio_free(extcon_data->gpio);
-err_request_gpio:
+err:
extcon_dev_unregister(&extcon_data->edev);
-err_extcon_dev_register:
- devm_kfree(&pdev->dev, extcon_data);
return ret;
}
cancel_delayed_work_sync(&extcon_data->work);
free_irq(extcon_data->irq, extcon_data);
- gpio_free(extcon_data->gpio);
extcon_dev_unregister(&extcon_data->edev);
- devm_kfree(&pdev->dev, extcon_data);
return 0;
}
#define HV_PRESENT_BIT 0x80000000
#define HV_LINUX_GUEST_ID_LO 0x00000000
-#define HV_LINUX_GUEST_ID_HI 0xB16B00B5
+#define HV_LINUX_GUEST_ID_HI 2976579765
#define HV_LINUX_GUEST_ID (((u64)HV_LINUX_GUEST_ID_HI << 32) | \
HV_LINUX_GUEST_ID_LO)
struct device *dev;
struct power_supply bat;
struct device *w1_dev;
- struct task_struct *mutex_holder;
};
enum current_types {
static inline int ds2780_battery_io(struct ds2780_device_info *dev_info,
char *buf, int addr, size_t count, int io)
{
- if (dev_info->mutex_holder == current)
- return w1_ds2780_io_nolock(dev_info->w1_dev, buf, addr, count, io);
- else
- return w1_ds2780_io(dev_info->w1_dev, buf, addr, count, io);
+ return w1_ds2780_io(dev_info->w1_dev, buf, addr, count, io);
}
static inline int ds2780_read8(struct ds2780_device_info *dev_info, u8 *val,
dev_info->bat.properties = ds2780_battery_props;
dev_info->bat.num_properties = ARRAY_SIZE(ds2780_battery_props);
dev_info->bat.get_property = ds2780_battery_get_property;
- dev_info->mutex_holder = current;
ret = power_supply_register(&pdev->dev, &dev_info->bat);
if (ret) {
goto fail_remove_bin_file;
}
- dev_info->mutex_holder = NULL;
-
return 0;
fail_remove_bin_file:
{
struct ds2780_device_info *dev_info = platform_get_drvdata(pdev);
- dev_info->mutex_holder = current;
-
/* remove attributes */
sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
struct device *dev;
struct power_supply bat;
struct device *w1_dev;
- struct task_struct *mutex_holder;
};
enum current_types {
static inline int ds2781_battery_io(struct ds2781_device_info *dev_info,
char *buf, int addr, size_t count, int io)
{
- if (dev_info->mutex_holder == current)
- return w1_ds2781_io_nolock(dev_info->w1_dev, buf, addr,
- count, io);
- else
- return w1_ds2781_io(dev_info->w1_dev, buf, addr, count, io);
+ return w1_ds2781_io(dev_info->w1_dev, buf, addr, count, io);
}
int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf,
dev_info->bat.properties = ds2781_battery_props;
dev_info->bat.num_properties = ARRAY_SIZE(ds2781_battery_props);
dev_info->bat.get_property = ds2781_battery_get_property;
- dev_info->mutex_holder = current;
ret = power_supply_register(&pdev->dev, &dev_info->bat);
if (ret) {
goto fail_remove_bin_file;
}
- dev_info->mutex_holder = NULL;
-
return 0;
fail_remove_bin_file:
{
struct ds2781_device_info *dev_info = platform_get_drvdata(pdev);
- dev_info->mutex_holder = current;
-
/* remove attributes */
sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
return;
}
+ mutex_lock(&master_dev->bus_mutex);
if (ds1wm_reset(ds1wm_data)) {
+ mutex_unlock(&master_dev->bus_mutex);
dev_dbg(&ds1wm_data->pdev->dev,
"pass: %d reset error (or no slaves)\n", pass);
break;
}
if (ds1wm_data->read_error) {
+ mutex_unlock(&master_dev->bus_mutex);
dev_err(&ds1wm_data->pdev->dev,
"pass: %d read error, retrying\n", pass);
break;
dev_dbg(&ds1wm_data->pdev->dev,
"pass: %d resetting bus\n", pass);
ds1wm_reset(ds1wm_data);
+ mutex_unlock(&master_dev->bus_mutex);
if ((r_prime & ((u64)1 << 63)) && (d & ((u64)1 << 63))) {
dev_err(&ds1wm_data->pdev->dev,
"pass: %d bus error, retrying\n", pass);
hdq_data->hdq_irqstatus, OMAP_HDQ_TIMEOUT);
if (ret == 0) {
dev_dbg(hdq_data->dev, "TX wait elapsed\n");
+ ret = -ETIMEDOUT;
goto out;
}
/* check irqstatus */
if (!(*status & OMAP_HDQ_INT_STATUS_TXCOMPLETE)) {
dev_dbg(hdq_data->dev, "timeout waiting for"
- "TXCOMPLETE/RXCOMPLETE, %x", *status);
+ " TXCOMPLETE/RXCOMPLETE, %x", *status);
ret = -ETIMEDOUT;
goto out;
}
OMAP_HDQ_FLAG_CLEAR, &tmp_status);
if (ret) {
dev_dbg(hdq_data->dev, "timeout waiting GO bit"
- "return to zero, %x", tmp_status);
+ " return to zero, %x", tmp_status);
}
out:
&tmp_status);
if (ret)
dev_dbg(hdq_data->dev, "timeout waiting INIT&GO bits"
- "return to zero, %x", tmp_status);
+ " return to zero, %x", tmp_status);
out:
mutex_unlock(&hdq_data->hdq_mutex);
{
int ret = 0;
u8 status;
- unsigned long timeout = jiffies + OMAP_HDQ_TIMEOUT;
ret = mutex_lock_interruptible(&hdq_data->hdq_mutex);
if (ret < 0) {
OMAP_HDQ_CTRL_STATUS_DIR | OMAP_HDQ_CTRL_STATUS_GO,
OMAP_HDQ_CTRL_STATUS_DIR | OMAP_HDQ_CTRL_STATUS_GO);
/*
- * The RX comes immediately after TX. It
- * triggers another interrupt before we
- * sleep. So we have to wait for RXCOMPLETE bit.
+ * The RX comes immediately after TX.
*/
- while (!(hdq_data->hdq_irqstatus
- & OMAP_HDQ_INT_STATUS_RXCOMPLETE)
- && time_before(jiffies, timeout)) {
- schedule_timeout_uninterruptible(1);
- }
+ wait_event_timeout(hdq_wait_queue,
+ (hdq_data->hdq_irqstatus
+ & OMAP_HDQ_INT_STATUS_RXCOMPLETE),
+ OMAP_HDQ_TIMEOUT);
+
hdq_reg_merge(hdq_data, OMAP_HDQ_CTRL_STATUS, 0,
OMAP_HDQ_CTRL_STATUS_DIR);
status = hdq_data->hdq_irqstatus;
/* check irqstatus */
if (!(status & OMAP_HDQ_INT_STATUS_RXCOMPLETE)) {
dev_dbg(hdq_data->dev, "timeout waiting for"
- "RXCOMPLETE, %x", status);
+ " RXCOMPLETE, %x", status);
ret = -ETIMEDOUT;
goto out;
}
out:
mutex_unlock(&hdq_data->hdq_mutex);
rtn:
- return 0;
+ return ret;
}
if (0 == hdq_data->hdq_usecount) {
dev_dbg(hdq_data->dev, "attempt to decrement use count"
- "when it is zero");
+ " when it is zero");
ret = -EINVAL;
} else {
hdq_data->hdq_usecount--;
mutex_unlock(&hdq_data->hdq_mutex);
ret = hdq_write_byte(hdq_data, byte, &status);
- if (ret == 0) {
+ if (ret < 0) {
dev_dbg(hdq_data->dev, "TX failure:Ctrl status %x\n", status);
return;
}
If you are unsure, say N.
+config W1_SLAVE_DS28E04
+ tristate "4096-Bit Addressable 1-Wire EEPROM with PIO (DS28E04-100)"
+ depends on W1
+ select CRC16
+ help
+ If you enable this you will have the DS28E04-100
+ chip support.
+
+ Say Y here if you want to use a 1-wire
+ 4kb EEPROM with PIO family device (DS28E04).
+
+ If you are unsure, say N.
+
config W1_SLAVE_BQ27000
tristate "BQ27000 slave support"
depends on W1
obj-$(CONFIG_W1_SLAVE_DS2780) += w1_ds2780.o
obj-$(CONFIG_W1_SLAVE_DS2781) += w1_ds2781.o
obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o
+obj-$(CONFIG_W1_SLAVE_DS28E04) += w1_ds28e04.o
u8 val;
struct w1_slave *sl = container_of(dev->parent, struct w1_slave, dev);
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
w1_write_8(sl->master, HDQ_CMD_READ | reg);
val = w1_read_8(sl->master);
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return val;
}
if (!buf)
return -EINVAL;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
dev_dbg(&sl->dev, "mutex locked");
if (w1_reset_select_slave(sl)) {
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return -EIO;
}
w1_write_block(sl->master, wrbuf, 3);
*buf = w1_read_8(sl->master);
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
dev_dbg(&sl->dev, "mutex unlocked");
return 1;
}
return -EFAULT;
dev_dbg(&sl->dev, "locking mutex for write_output");
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
dev_dbg(&sl->dev, "mutex locked");
if (w1_reset_select_slave(sl))
/* read the result of the READ_PIO_REGS command */
if (w1_read_8(sl->master) == *buf) {
/* success! */
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
dev_dbg(&sl->dev,
"mutex unlocked, retries:%d", retries);
return 1;
}
}
error:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
dev_dbg(&sl->dev, "mutex unlocked in error, retries:%d", retries);
return -EIO;
if (count != 1 || off != 0)
return -EFAULT;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl))
goto error;
while (retries--) {
w1_write_8(sl->master, W1_F29_FUNC_RESET_ACTIVITY_LATCHES);
if (w1_read_8(sl->master) == W1_F29_SUCCESS_CONFIRM_BYTE) {
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return 1;
}
if (w1_reset_resume_command(sl->master))
}
error:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return -EIO;
}
if (count != 1 || off != 0)
return -EFAULT;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl))
goto error;
w1_write_block(sl->master, w1_buf, 3);
if (w1_read_8(sl->master) == *buf) {
/* success! */
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return 1;
}
}
error:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return -EIO;
}
wrbuf[0] = 0xA5;
wrbuf[1] = rom_addr & 0xFF;
wrbuf[2] = rom_addr >> 8;
- mutex_lock(&dev->mutex);
+ mutex_lock(&dev->bus_mutex);
if (!w1_reset_select_slave(sl)) {
w1_write_block(dev, wrbuf, 3);
read_byte_count = 0;
} else {
c -= snprintf(out_buf + PAGE_SIZE - c, c, "Connection error");
}
- mutex_unlock(&dev->mutex);
+ mutex_unlock(&dev->bus_mutex);
return PAGE_SIZE - c;
}
if (count == 0)
return 0;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
/* read directly from the EEPROM in chunks of W1_F2D_READ_MAXLEN */
while (todo > 0) {
off += W1_F2D_READ_MAXLEN;
}
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return count;
}
if (count == 0)
return 0;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
/* Can only write data in blocks of the size of the scratchpad */
addr = off;
}
out_up:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return count;
}
if ((count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
return 0;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
out_up:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return count;
}
}
#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
/* Can only write data to one page at a time */
idx = 0;
}
out_up:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return count;
}
if (!dev)
return 0;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
if (addr > DS2760_DATA_SIZE || addr < 0) {
count = 0;
}
out:
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return count;
}
if (!dev)
return -EINVAL;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl) == 0) {
w1_write_8(sl->master, cmd);
w1_write_8(sl->master, addr);
}
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return 0;
}
if (!dev)
return -ENODEV;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
ret = w1_ds2780_do_io(dev, buf, addr, count, io);
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return ret;
}
EXPORT_SYMBOL(w1_ds2780_io);
-int w1_ds2780_io_nolock(struct device *dev, char *buf, int addr, size_t count,
- int io)
-{
- int ret;
-
- if (!dev)
- return -ENODEV;
-
- ret = w1_ds2780_do_io(dev, buf, addr, count, io);
-
- return ret;
-}
-EXPORT_SYMBOL(w1_ds2780_io_nolock);
-
int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return -EINVAL;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl) == 0) {
w1_write_8(sl->master, cmd);
w1_write_8(sl->master, addr);
}
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return 0;
}
EXPORT_SYMBOL(w1_ds2780_eeprom_cmd);
extern int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
int io);
-extern int w1_ds2780_io_nolock(struct device *dev, char *buf, int addr,
- size_t count, int io);
extern int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd);
#endif /* !_W1_DS2780_H */
if (!dev)
return -ENODEV;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
ret = w1_ds2781_do_io(dev, buf, addr, count, io);
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return ret;
}
EXPORT_SYMBOL(w1_ds2781_io);
-int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr, size_t count,
- int io)
-{
- int ret;
-
- if (!dev)
- return -ENODEV;
-
- ret = w1_ds2781_do_io(dev, buf, addr, count, io);
-
- return ret;
-}
-EXPORT_SYMBOL(w1_ds2781_io_nolock);
-
int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return -EINVAL;
- mutex_lock(&sl->master->mutex);
+ mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl) == 0) {
w1_write_8(sl->master, cmd);
w1_write_8(sl->master, addr);
}
- mutex_unlock(&sl->master->mutex);
+ mutex_unlock(&sl->master->bus_mutex);
return 0;
}
EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
extern int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
int io);
-extern int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr,
- size_t count, int io);
extern int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd);
#endif /* !_W1_DS2781_H */
--- /dev/null
+/*
+ * w1_ds28e04.c - w1 family 1C (DS28E04) driver
+ *
+ * Copyright (c) 2012 Markus Franke <franke.m@sebakmt.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/crc16.h>
+#include <linux/uaccess.h>
+
+#define CRC16_INIT 0
+#define CRC16_VALID 0xb001
+
+#include "../w1.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Markus Franke <franke.m@sebakmt.com>, <franm@hrz.tu-chemnitz.de>");
+MODULE_DESCRIPTION("w1 family 1C driver for DS28E04, 4kb EEPROM and PIO");
+
+/* Allow the strong pullup to be disabled, but default to enabled.
+ * If it was disabled a parasite powered device might not get the required
+ * current to copy the data from the scratchpad to EEPROM. If it is enabled
+ * parasite powered devices have a better chance of getting the current
+ * required.
+ */
+static int w1_strong_pullup = 1;
+module_param_named(strong_pullup, w1_strong_pullup, int, 0);
+
+/* enable/disable CRC checking on DS28E04-100 memory accesses */
+static char w1_enable_crccheck = 1;
+
+#define W1_EEPROM_SIZE 512
+#define W1_PAGE_COUNT 16
+#define W1_PAGE_SIZE 32
+#define W1_PAGE_BITS 5
+#define W1_PAGE_MASK 0x1F
+
+#define W1_F1C_READ_EEPROM 0xF0
+#define W1_F1C_WRITE_SCRATCH 0x0F
+#define W1_F1C_READ_SCRATCH 0xAA
+#define W1_F1C_COPY_SCRATCH 0x55
+#define W1_F1C_ACCESS_WRITE 0x5A
+
+#define W1_1C_REG_LOGIC_STATE 0x220
+
+struct w1_f1C_data {
+ u8 memory[W1_EEPROM_SIZE];
+ u32 validcrc;
+};
+
+/**
+ * Check the file size bounds and adjusts count as needed.
+ * This would not be needed if the file size didn't reset to 0 after a write.
+ */
+static inline size_t w1_f1C_fix_count(loff_t off, size_t count, size_t size)
+{
+ if (off > size)
+ return 0;
+
+ if ((off + count) > size)
+ return size - off;
+
+ return count;
+}
+
+static int w1_f1C_refresh_block(struct w1_slave *sl, struct w1_f1C_data *data,
+ int block)
+{
+ u8 wrbuf[3];
+ int off = block * W1_PAGE_SIZE;
+
+ if (data->validcrc & (1 << block))
+ return 0;
+
+ if (w1_reset_select_slave(sl)) {
+ data->validcrc = 0;
+ return -EIO;
+ }
+
+ wrbuf[0] = W1_F1C_READ_EEPROM;
+ wrbuf[1] = off & 0xff;
+ wrbuf[2] = off >> 8;
+ w1_write_block(sl->master, wrbuf, 3);
+ w1_read_block(sl->master, &data->memory[off], W1_PAGE_SIZE);
+
+ /* cache the block if the CRC is valid */
+ if (crc16(CRC16_INIT, &data->memory[off], W1_PAGE_SIZE) == CRC16_VALID)
+ data->validcrc |= (1 << block);
+
+ return 0;
+}
+
+static int w1_f1C_read(struct w1_slave *sl, int addr, int len, char *data)
+{
+ u8 wrbuf[3];
+
+ /* read directly from the EEPROM */
+ if (w1_reset_select_slave(sl))
+ return -EIO;
+
+ wrbuf[0] = W1_F1C_READ_EEPROM;
+ wrbuf[1] = addr & 0xff;
+ wrbuf[2] = addr >> 8;
+
+ w1_write_block(sl->master, wrbuf, sizeof(wrbuf));
+ return w1_read_block(sl->master, data, len);
+}
+
+static ssize_t w1_f1C_read_bin(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ struct w1_f1C_data *data = sl->family_data;
+ int i, min_page, max_page;
+
+ count = w1_f1C_fix_count(off, count, W1_EEPROM_SIZE);
+ if (count == 0)
+ return 0;
+
+ mutex_lock(&sl->master->mutex);
+
+ if (w1_enable_crccheck) {
+ min_page = (off >> W1_PAGE_BITS);
+ max_page = (off + count - 1) >> W1_PAGE_BITS;
+ for (i = min_page; i <= max_page; i++) {
+ if (w1_f1C_refresh_block(sl, data, i)) {
+ count = -EIO;
+ goto out_up;
+ }
+ }
+ memcpy(buf, &data->memory[off], count);
+ } else {
+ count = w1_f1C_read(sl, off, count, buf);
+ }
+
+out_up:
+ mutex_unlock(&sl->master->mutex);
+
+ return count;
+}
+
+/**
+ * Writes to the scratchpad and reads it back for verification.
+ * Then copies the scratchpad to EEPROM.
+ * The data must be on one page.
+ * The master must be locked.
+ *
+ * @param sl The slave structure
+ * @param addr Address for the write
+ * @param len length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK))
+ * @param data The data to write
+ * @return 0=Success -1=failure
+ */
+static int w1_f1C_write(struct w1_slave *sl, int addr, int len, const u8 *data)
+{
+ u8 wrbuf[4];
+ u8 rdbuf[W1_PAGE_SIZE + 3];
+ u8 es = (addr + len - 1) & 0x1f;
+ unsigned int tm = 10;
+ int i;
+ struct w1_f1C_data *f1C = sl->family_data;
+
+ /* Write the data to the scratchpad */
+ if (w1_reset_select_slave(sl))
+ return -1;
+
+ wrbuf[0] = W1_F1C_WRITE_SCRATCH;
+ wrbuf[1] = addr & 0xff;
+ wrbuf[2] = addr >> 8;
+
+ w1_write_block(sl->master, wrbuf, 3);
+ w1_write_block(sl->master, data, len);
+
+ /* Read the scratchpad and verify */
+ if (w1_reset_select_slave(sl))
+ return -1;
+
+ w1_write_8(sl->master, W1_F1C_READ_SCRATCH);
+ w1_read_block(sl->master, rdbuf, len + 3);
+
+ /* Compare what was read against the data written */
+ if ((rdbuf[0] != wrbuf[1]) || (rdbuf[1] != wrbuf[2]) ||
+ (rdbuf[2] != es) || (memcmp(data, &rdbuf[3], len) != 0))
+ return -1;
+
+ /* Copy the scratchpad to EEPROM */
+ if (w1_reset_select_slave(sl))
+ return -1;
+
+ wrbuf[0] = W1_F1C_COPY_SCRATCH;
+ wrbuf[3] = es;
+
+ for (i = 0; i < sizeof(wrbuf); ++i) {
+ /* issue 10ms strong pullup (or delay) on the last byte
+ for writing the data from the scratchpad to EEPROM */
+ if (w1_strong_pullup && i == sizeof(wrbuf)-1)
+ w1_next_pullup(sl->master, tm);
+
+ w1_write_8(sl->master, wrbuf[i]);
+ }
+
+ if (!w1_strong_pullup)
+ msleep(tm);
+
+ if (w1_enable_crccheck) {
+ /* invalidate cached data */
+ f1C->validcrc &= ~(1 << (addr >> W1_PAGE_BITS));
+ }
+
+ /* Reset the bus to wake up the EEPROM (this may not be needed) */
+ w1_reset_bus(sl->master);
+
+ return 0;
+}
+
+static ssize_t w1_f1C_write_bin(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ int addr, len, idx;
+
+ count = w1_f1C_fix_count(off, count, W1_EEPROM_SIZE);
+ if (count == 0)
+ return 0;
+
+ if (w1_enable_crccheck) {
+ /* can only write full blocks in cached mode */
+ if ((off & W1_PAGE_MASK) || (count & W1_PAGE_MASK)) {
+ dev_err(&sl->dev, "invalid offset/count off=%d cnt=%zd\n",
+ (int)off, count);
+ return -EINVAL;
+ }
+
+ /* make sure the block CRCs are valid */
+ for (idx = 0; idx < count; idx += W1_PAGE_SIZE) {
+ if (crc16(CRC16_INIT, &buf[idx], W1_PAGE_SIZE)
+ != CRC16_VALID) {
+ dev_err(&sl->dev, "bad CRC at offset %d\n",
+ (int)off);
+ return -EINVAL;
+ }
+ }
+ }
+
+ mutex_lock(&sl->master->mutex);
+
+ /* Can only write data to one page at a time */
+ idx = 0;
+ while (idx < count) {
+ addr = off + idx;
+ len = W1_PAGE_SIZE - (addr & W1_PAGE_MASK);
+ if (len > (count - idx))
+ len = count - idx;
+
+ if (w1_f1C_write(sl, addr, len, &buf[idx]) < 0) {
+ count = -EIO;
+ goto out_up;
+ }
+ idx += len;
+ }
+
+out_up:
+ mutex_unlock(&sl->master->mutex);
+
+ return count;
+}
+
+static ssize_t w1_f1C_read_pio(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ int ret;
+
+ /* check arguments */
+ if (off != 0 || count != 1 || buf == NULL)
+ return -EINVAL;
+
+ mutex_lock(&sl->master->mutex);
+ ret = w1_f1C_read(sl, W1_1C_REG_LOGIC_STATE, count, buf);
+ mutex_unlock(&sl->master->mutex);
+
+ return ret;
+}
+
+static ssize_t w1_f1C_write_pio(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+
+{
+ struct w1_slave *sl = kobj_to_w1_slave(kobj);
+ u8 wrbuf[3];
+ u8 ack;
+
+ /* check arguments */
+ if (off != 0 || count != 1 || buf == NULL)
+ return -EINVAL;
+
+ mutex_lock(&sl->master->mutex);
+
+ /* Write the PIO data */
+ if (w1_reset_select_slave(sl)) {
+ mutex_unlock(&sl->master->mutex);
+ return -1;
+ }
+
+ /* set bit 7..2 to value '1' */
+ *buf = *buf | 0xFC;
+
+ wrbuf[0] = W1_F1C_ACCESS_WRITE;
+ wrbuf[1] = *buf;
+ wrbuf[2] = ~(*buf);
+ w1_write_block(sl->master, wrbuf, 3);
+
+ w1_read_block(sl->master, &ack, sizeof(ack));
+
+ mutex_unlock(&sl->master->mutex);
+
+ /* check for acknowledgement */
+ if (ack != 0xAA)
+ return -EIO;
+
+ return count;
+}
+
+static ssize_t w1_f1C_show_crccheck(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ if (put_user(w1_enable_crccheck + 0x30, buf))
+ return -EFAULT;
+
+ return sizeof(w1_enable_crccheck);
+}
+
+static ssize_t w1_f1C_store_crccheck(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ char val;
+
+ if (count != 1 || !buf)
+ return -EINVAL;
+
+ if (get_user(val, buf))
+ return -EFAULT;
+
+ /* convert to decimal */
+ val = val - 0x30;
+ if (val != 0 && val != 1)
+ return -EINVAL;
+
+ /* set the new value */
+ w1_enable_crccheck = val;
+
+ return sizeof(w1_enable_crccheck);
+}
+
+#define NB_SYSFS_BIN_FILES 2
+static struct bin_attribute w1_f1C_bin_attr[NB_SYSFS_BIN_FILES] = {
+ {
+ .attr = {
+ .name = "eeprom",
+ .mode = S_IRUGO | S_IWUSR,
+ },
+ .size = W1_EEPROM_SIZE,
+ .read = w1_f1C_read_bin,
+ .write = w1_f1C_write_bin,
+ },
+ {
+ .attr = {
+ .name = "pio",
+ .mode = S_IRUGO | S_IWUSR,
+ },
+ .size = 1,
+ .read = w1_f1C_read_pio,
+ .write = w1_f1C_write_pio,
+ }
+};
+
+static DEVICE_ATTR(crccheck, S_IWUSR | S_IRUGO,
+ w1_f1C_show_crccheck, w1_f1C_store_crccheck);
+
+static int w1_f1C_add_slave(struct w1_slave *sl)
+{
+ int err = 0;
+ int i;
+ struct w1_f1C_data *data = NULL;
+
+ if (w1_enable_crccheck) {
+ data = kzalloc(sizeof(struct w1_f1C_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ sl->family_data = data;
+ }
+
+ /* create binary sysfs attributes */
+ for (i = 0; i < NB_SYSFS_BIN_FILES && !err; ++i)
+ err = sysfs_create_bin_file(
+ &sl->dev.kobj, &(w1_f1C_bin_attr[i]));
+
+ if (!err) {
+ /* create device attributes */
+ err = device_create_file(&sl->dev, &dev_attr_crccheck);
+ }
+
+ if (err) {
+ /* remove binary sysfs attributes */
+ for (i = 0; i < NB_SYSFS_BIN_FILES; ++i)
+ sysfs_remove_bin_file(
+ &sl->dev.kobj, &(w1_f1C_bin_attr[i]));
+
+ kfree(data);
+ }
+
+ return err;
+}
+
+static void w1_f1C_remove_slave(struct w1_slave *sl)
+{
+ int i;
+
+ kfree(sl->family_data);
+ sl->family_data = NULL;
+
+ /* remove device attributes */
+ device_remove_file(&sl->dev, &dev_attr_crccheck);
+
+ /* remove binary sysfs attributes */
+ for (i = 0; i < NB_SYSFS_BIN_FILES; ++i)
+ sysfs_remove_bin_file(&sl->dev.kobj, &(w1_f1C_bin_attr[i]));
+}
+
+static struct w1_family_ops w1_f1C_fops = {
+ .add_slave = w1_f1C_add_slave,
+ .remove_slave = w1_f1C_remove_slave,
+};
+
+static struct w1_family w1_family_1C = {
+ .fid = W1_FAMILY_DS28E04,
+ .fops = &w1_f1C_fops,
+};
+
+static int __init w1_f1C_init(void)
+{
+ return w1_register_family(&w1_family_1C);
+}
+
+static void __exit w1_f1C_fini(void)
+{
+ w1_unregister_family(&w1_family_1C);
+}
+
+module_init(w1_f1C_init);
+module_exit(w1_f1C_fini);
int i, max_trying = 10;
ssize_t c = PAGE_SIZE;
- i = mutex_lock_interruptible(&dev->mutex);
+ i = mutex_lock_interruptible(&dev->bus_mutex);
if (i != 0)
return i;
w1_write_8(dev, W1_CONVERT_TEMP);
if (external_power) {
- mutex_unlock(&dev->mutex);
+ mutex_unlock(&dev->bus_mutex);
sleep_rem = msleep_interruptible(tm);
if (sleep_rem != 0)
return -EINTR;
- i = mutex_lock_interruptible(&dev->mutex);
+ i = mutex_lock_interruptible(&dev->bus_mutex);
if (i != 0)
return i;
} else if (!w1_strong_pullup) {
sleep_rem = msleep_interruptible(tm);
if (sleep_rem != 0) {
- mutex_unlock(&dev->mutex);
+ mutex_unlock(&dev->bus_mutex);
return -EINTR;
}
}
c -= snprintf(buf + PAGE_SIZE - c, c, "t=%d\n",
w1_convert_temp(rom, sl->family->fid));
- mutex_unlock(&dev->mutex);
+ mutex_unlock(&dev->bus_mutex);
return PAGE_SIZE - c;
}
struct w1_master *md = NULL;
struct w1_slave *sl = NULL;
char *event_owner, *name;
- int err;
+ int err = 0;
if (dev->driver == &w1_master_driver) {
md = container_of(dev, struct w1_master, dev);
event_owner, name, dev_name(dev));
if (dev->driver != &w1_slave_driver || !sl)
- return 0;
+ goto end;
err = add_uevent_var(env, "W1_FID=%02X", sl->reg_num.family);
if (err)
- return err;
+ goto end;
err = add_uevent_var(env, "W1_SLAVE_ID=%024LX",
(unsigned long long)sl->reg_num.id);
- if (err)
- return err;
-
- return 0;
-};
+end:
+ return err;
+}
#else
static int w1_uevent(struct device *dev, struct kobj_uevent_env *env)
{
*
* Return 0 - device(s) present, 1 - no devices present.
*/
+ mutex_lock(&dev->bus_mutex);
if (w1_reset_bus(dev)) {
+ mutex_unlock(&dev->bus_mutex);
dev_dbg(&dev->dev, "No devices present on the wire.\n");
break;
}
/* Do fast search on single slave bus */
if (dev->max_slave_count == 1) {
+ int rv;
w1_write_8(dev, W1_READ_ROM);
+ rv = w1_read_block(dev, (u8 *)&rn, 8);
+ mutex_unlock(&dev->bus_mutex);
- if (w1_read_block(dev, (u8 *)&rn, 8) == 8 && rn)
+ if (rv == 8 && rn)
cb(dev, rn);
break;
rn |= (tmp64 << i);
if (kthread_should_stop()) {
+ mutex_unlock(&dev->bus_mutex);
dev_dbg(&dev->dev, "Abort w1_search\n");
return;
}
}
+ mutex_unlock(&dev->bus_mutex);
if ( (triplet_ret & 0x03) != 0x03 ) {
if ( (desc_bit == last_zero) || (last_zero < 0))
struct task_struct *thread;
struct mutex mutex;
+ struct mutex bus_mutex;
struct device_driver *driver;
struct device dev;
#define W1_FAMILY_SMEM_01 0x01
#define W1_FAMILY_SMEM_81 0x81
#define W1_THERM_DS18S20 0x10
+#define W1_FAMILY_DS28E04 0x1C
#define W1_COUNTER_DS2423 0x1D
#define W1_THERM_DS1822 0x22
#define W1_EEPROM_DS2433 0x23
INIT_LIST_HEAD(&dev->slist);
mutex_init(&dev->mutex);
+ mutex_init(&dev->bus_mutex);
memcpy(&dev->dev, device, sizeof(struct device));
dev_set_name(&dev->dev, "w1_bus_master%u", dev->id);
return(-EINVAL);
}
/* While it would be electrically possible to make a device that
- * generated a strong pullup in bit bang mode, only hardare that
+ * generated a strong pullup in bit bang mode, only hardware that
* controls 1-wire time frames are even expected to support a strong
* pullup. w1_io.c would need to support calling set_pullup before
* the last write_bit operation of a w1_write_8 which it currently
struct dentry *parent;
int ret;
- if (!dentry)
+ if (IS_ERR_OR_NULL(dentry))
return;
parent = dentry->d_parent;
struct dentry *child;
struct dentry *parent;
- if (!dentry)
+ if (IS_ERR_OR_NULL(dentry))
return;
parent = dentry->d_parent;
{
struct sysfs_dirent *sd;
int is_dir;
+ int type;
if (flags & LOOKUP_RCU)
return -ECHILD;
if (strcmp(dentry->d_name.name, sd->s_name) != 0)
goto out_bad;
+ /* The sysfs dirent has been moved to a different namespace */
+ type = KOBJ_NS_TYPE_NONE;
+ if (sd->s_parent) {
+ type = sysfs_ns_type(sd->s_parent);
+ if (type != KOBJ_NS_TYPE_NONE &&
+ sysfs_info(dentry->d_sb)->ns[type] != sd->s_ns)
+ goto out_bad;
+ }
+
mutex_unlock(&sysfs_mutex);
out_valid:
return 1;
struct iommu_group *iommu_group;
};
+static inline struct device *kobj_to_dev(struct kobject *kobj)
+{
+ return container_of(kobj, struct device, kobj);
+}
+
/* Get the wakeup routines, which depend on struct device */
#include <linux/pm_wakeup.h>
* @irq_flags IRQ Flags (e.g., IRQF_TRIGGER_LOW).
* @state_on print_state is overriden with state_on if attached. If Null,
* default method of extcon class is used.
- * @state_off print_state is overriden with state_on if dettached. If Null,
+ * @state_off print_state is overriden with state_on if detached. If Null,
* default method of extcon class is used.
*
* Note that in order for state_on or state_off to be valid, both state_on
#ifdef CONFIG_BLOCK
-#define kobj_to_dev(k) container_of((k), struct device, kobj)
#define dev_to_disk(device) container_of((device), struct gendisk, part0.__dev)
#define dev_to_part(device) container_of((device), struct hd_struct, __dev)
#define disk_to_dev(disk) (&(disk)->part0.__dev)
*/
static DEFINE_RAW_SPINLOCK(logbuf_lock);
+#ifdef CONFIG_PRINTK
/* the next printk record to read by syslog(READ) or /proc/kmsg */
static u64 syslog_seq;
static u32 syslog_idx;
/* index and sequence number of the next record to store in the buffer */
static u64 log_next_seq;
-#ifdef CONFIG_PRINTK
static u32 log_next_idx;
+/* the next printk record to write to the console */
+static u64 console_seq;
+static u32 console_idx;
+static enum log_flags console_prev;
+
/* the next printk record to read after the last 'clear' command */
static u64 clear_seq;
static u32 clear_idx;
-#define LOG_LINE_MAX 1024
+#define PREFIX_MAX 32
+#define LOG_LINE_MAX 1024 - PREFIX_MAX
/* record buffer */
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
struct devkmsg_user {
u64 seq;
u32 idx;
+ enum log_flags prev;
struct mutex lock;
char buf[8192];
};
struct log *msg;
u64 ts_usec;
size_t i;
+ char cont = '-';
size_t len;
ssize_t ret;
msg = log_from_idx(user->idx);
ts_usec = msg->ts_nsec;
do_div(ts_usec, 1000);
- len = sprintf(user->buf, "%u,%llu,%llu;",
- (msg->facility << 3) | msg->level, user->seq, ts_usec);
+
+ /*
+ * If we couldn't merge continuation line fragments during the print,
+ * export the stored flags to allow an optional external merge of the
+ * records. Merging the records isn't always neccessarily correct, like
+ * when we hit a race during printing. In most cases though, it produces
+ * better readable output. 'c' in the record flags mark the first
+ * fragment of a line, '+' the following.
+ */
+ if (msg->flags & LOG_CONT && !(user->prev & LOG_CONT))
+ cont = 'c';
+ else if ((msg->flags & LOG_CONT) ||
+ ((user->prev & LOG_CONT) && !(msg->flags & LOG_PREFIX)))
+ cont = '+';
+
+ len = sprintf(user->buf, "%u,%llu,%llu,%c;",
+ (msg->facility << 3) | msg->level,
+ user->seq, ts_usec, cont);
+ user->prev = msg->flags;
/* escape non-printable characters */
for (i = 0; i < msg->text_len; i++) {
VMCOREINFO_SYMBOL(log_buf_len);
VMCOREINFO_SYMBOL(log_first_idx);
VMCOREINFO_SYMBOL(log_next_idx);
+ /*
+ * Export struct log size and field offsets. User space tools can
+ * parse it and detect any changes to structure down the line.
+ */
+ VMCOREINFO_STRUCT_SIZE(log);
+ VMCOREINFO_OFFSET(log, ts_nsec);
+ VMCOREINFO_OFFSET(log, len);
+ VMCOREINFO_OFFSET(log, text_len);
+ VMCOREINFO_OFFSET(log, dict_len);
}
#endif
if (buf) {
if (print_prefix(msg, syslog, NULL) +
- text_len + 1>= size - len)
+ text_len + 1 >= size - len)
break;
if (prefix)
struct log *msg;
int len = 0;
- text = kmalloc(LOG_LINE_MAX, GFP_KERNEL);
+ text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
if (!text)
return -ENOMEM;
skip = syslog_partial;
msg = log_from_idx(syslog_idx);
- n = msg_print_text(msg, syslog_prev, true, text, LOG_LINE_MAX);
+ n = msg_print_text(msg, syslog_prev, true, text,
+ LOG_LINE_MAX + PREFIX_MAX);
if (n - syslog_partial <= size) {
/* message fits into buffer, move forward */
syslog_idx = log_next(syslog_idx);
char *text;
int len = 0;
- text = kmalloc(LOG_LINE_MAX, GFP_KERNEL);
+ text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
if (!text)
return -ENOMEM;
struct log *msg = log_from_idx(idx);
int textlen;
- textlen = msg_print_text(msg, prev, true, text, LOG_LINE_MAX);
+ textlen = msg_print_text(msg, prev, true, text,
+ LOG_LINE_MAX + PREFIX_MAX);
if (textlen < 0) {
len = textlen;
break;
u64 ts_nsec; /* time of first print */
u8 level; /* log level of first message */
u8 facility; /* log level of first message */
+ enum log_flags flags; /* prefix, newline flags */
bool flushed:1; /* buffer sealed and committed */
} cont;
-static void cont_flush(void)
+static void cont_flush(enum log_flags flags)
{
if (cont.flushed)
return;
if (cont.len == 0)
return;
- log_store(cont.facility, cont.level, LOG_NOCONS, cont.ts_nsec,
- NULL, 0, cont.buf, cont.len);
-
- cont.flushed = true;
+ if (cont.cons) {
+ /*
+ * If a fragment of this line was directly flushed to the
+ * console; wait for the console to pick up the rest of the
+ * line. LOG_NOCONS suppresses a duplicated output.
+ */
+ log_store(cont.facility, cont.level, flags | LOG_NOCONS,
+ cont.ts_nsec, NULL, 0, cont.buf, cont.len);
+ cont.flags = flags;
+ cont.flushed = true;
+ } else {
+ /*
+ * If no fragment of this line ever reached the console,
+ * just submit it to the store and free the buffer.
+ */
+ log_store(cont.facility, cont.level, flags, 0,
+ NULL, 0, cont.buf, cont.len);
+ cont.len = 0;
+ }
}
static bool cont_add(int facility, int level, const char *text, size_t len)
return false;
if (cont.len + len > sizeof(cont.buf)) {
- cont_flush();
+ /* the line gets too long, split it up in separate records */
+ cont_flush(LOG_CONT);
return false;
}
cont.level = level;
cont.owner = current;
cont.ts_nsec = local_clock();
+ cont.flags = 0;
cont.cons = 0;
cont.flushed = false;
}
memcpy(cont.buf + cont.len, text, len);
cont.len += len;
+
+ if (cont.len > (sizeof(cont.buf) * 80) / 100)
+ cont_flush(LOG_CONT);
+
return true;
}
size_t textlen = 0;
size_t len;
- if (cont.cons == 0) {
+ if (cont.cons == 0 && (console_prev & LOG_NEWLINE)) {
textlen += print_time(cont.ts_nsec, text);
size -= textlen;
}
}
if (cont.flushed) {
- text[textlen++] = '\n';
+ if (cont.flags & LOG_NEWLINE)
+ text[textlen++] = '\n';
/* got everything, release buffer */
cont.len = 0;
}
* or another task also prints continuation lines.
*/
if (cont.len && (lflags & LOG_PREFIX || cont.owner != current))
- cont_flush();
+ cont_flush(LOG_NEWLINE);
/* buffer line if possible, otherwise store it right away */
if (!cont_add(facility, level, text, text_len))
if (cont.len && cont.owner == current) {
if (!(lflags & LOG_PREFIX))
stored = cont_add(facility, level, text, text_len);
- cont_flush();
+ cont_flush(LOG_NEWLINE);
}
if (!stored)
}
EXPORT_SYMBOL(printk);
-#else
+#else /* CONFIG_PRINTK */
+#define LOG_LINE_MAX 0
+#define PREFIX_MAX 0
#define LOG_LINE_MAX 0
+static u64 syslog_seq;
+static u32 syslog_idx;
+static u64 console_seq;
+static u32 console_idx;
+static enum log_flags syslog_prev;
+static u64 log_first_seq;
+static u32 log_first_idx;
+static u64 log_next_seq;
+static enum log_flags console_prev;
static struct cont {
size_t len;
size_t cons;
this_cpu_or(printk_pending, PRINTK_PENDING_WAKEUP);
}
-/* the next printk record to write to the console */
-static u64 console_seq;
-static u32 console_idx;
-static enum log_flags console_prev;
+static void console_cont_flush(char *text, size_t size)
+{
+ unsigned long flags;
+ size_t len;
+
+ raw_spin_lock_irqsave(&logbuf_lock, flags);
+
+ if (!cont.len)
+ goto out;
+
+ /*
+ * We still queue earlier records, likely because the console was
+ * busy. The earlier ones need to be printed before this one, we
+ * did not flush any fragment so far, so just let it queue up.
+ */
+ if (console_seq < log_next_seq && !cont.cons)
+ goto out;
+
+ len = cont_print_text(text, size);
+ raw_spin_unlock(&logbuf_lock);
+ stop_critical_timings();
+ call_console_drivers(cont.level, text, len);
+ start_critical_timings();
+ local_irq_restore(flags);
+ return;
+out:
+ raw_spin_unlock_irqrestore(&logbuf_lock, flags);
+}
/**
* console_unlock - unlock the console system
*/
void console_unlock(void)
{
- static char text[LOG_LINE_MAX];
+ static char text[LOG_LINE_MAX + PREFIX_MAX];
static u64 seen_seq;
unsigned long flags;
bool wake_klogd = false;
console_may_schedule = 0;
/* flush buffered message fragment immediately to console */
- raw_spin_lock_irqsave(&logbuf_lock, flags);
- if (cont.len && (cont.cons < cont.len || cont.flushed)) {
- size_t len;
-
- len = cont_print_text(text, sizeof(text));
- raw_spin_unlock(&logbuf_lock);
- stop_critical_timings();
- call_console_drivers(cont.level, text, len);
- start_critical_timings();
- local_irq_restore(flags);
- } else
- raw_spin_unlock_irqrestore(&logbuf_lock, flags);
-
+ console_cont_flush(text, sizeof(text));
again:
for (;;) {
struct log *msg;
* will properly dump everything later.
*/
msg->flags &= ~LOG_NOCONS;
+ console_prev = msg->flags;
goto skip;
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff