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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-02 17:16:10 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-02 17:16:10 -0700 |
commit | fc47912d9cda50ae6bd9ca30e97e8c03de5b7b60 (patch) | |
tree | d7da6ce3b23c1524e681ee33aa6e21d3c0586108 /drivers/input/misc | |
parent | 06fe918e9f177dc2a0592b0ad40a6ce4920b2033 (diff) | |
parent | dde3ada3d0069855eeb353707b2b0f946191cfd6 (diff) | |
download | talos-obmc-linux-fc47912d9cda50ae6bd9ca30e97e8c03de5b7b60.tar.gz talos-obmc-linux-fc47912d9cda50ae6bd9ca30e97e8c03de5b7b60.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
"A few drivers were updated with device tree bindings and others got a
few small cleanups and fixes."
Fix trivial conflict in drivers/input/keyboard/omap-keypad.c due to
changes clashing with a whitespace cleanup.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (28 commits)
Input: wacom - mark Intuos5 pad as in-prox when touching buttons
Input: synaptics - adjust threshold for treating position values as negative
Input: hgpk - use %*ph to dump small buffer
Input: gpio_keys_polled - fix dt pdata->nbuttons
Input: Add KD[GS]KBDIACRUC ioctls to the compatible list
Input: omap-keypad - fixed formatting
Input: tegra - move platform data header
Input: wacom - add support for EMR on Cintiq 24HD touch
Input: s3c2410_ts - make s3c_ts_pmops const
Input: samsung-keypad - use of_get_child_count() helper
Input: samsung-keypad - use of_match_ptr()
Input: uinput - fix formatting
Input: uinput - specify exact bit sizes on userspace APIs
Input: uinput - mark failed submission requests as free
Input: uinput - fix race that can block nonblocking read
Input: uinput - return -EINVAL when read buffer size is too small
Input: uinput - take event lock when fetching events from buffer
Input: get rid of MATCH_BIT() macro
Input: rotary-encoder - add DT bindings
Input: rotary-encoder - constify platform data pointers
...
Diffstat (limited to 'drivers/input/misc')
-rw-r--r-- | drivers/input/misc/rotary_encoder.c | 140 | ||||
-rw-r--r-- | drivers/input/misc/twl4030-pwrbutton.c | 1 | ||||
-rw-r--r-- | drivers/input/misc/uinput.c | 197 |
3 files changed, 218 insertions, 120 deletions
diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c index f07f784198b9..99a49e4968d2 100644 --- a/drivers/input/misc/rotary_encoder.c +++ b/drivers/input/misc/rotary_encoder.c @@ -24,12 +24,14 @@ #include <linux/gpio.h> #include <linux/rotary_encoder.h> #include <linux/slab.h> +#include <linux/of_platform.h> +#include <linux/of_gpio.h> #define DRV_NAME "rotary-encoder" struct rotary_encoder { struct input_dev *input; - struct rotary_encoder_platform_data *pdata; + const struct rotary_encoder_platform_data *pdata; unsigned int axis; unsigned int pos; @@ -43,7 +45,7 @@ struct rotary_encoder { char last_stable; }; -static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata) +static int rotary_encoder_get_state(const struct rotary_encoder_platform_data *pdata) { int a = !!gpio_get_value(pdata->gpio_a); int b = !!gpio_get_value(pdata->gpio_b); @@ -56,7 +58,7 @@ static int rotary_encoder_get_state(struct rotary_encoder_platform_data *pdata) static void rotary_encoder_report_event(struct rotary_encoder *encoder) { - struct rotary_encoder_platform_data *pdata = encoder->pdata; + const struct rotary_encoder_platform_data *pdata = encoder->pdata; if (pdata->relative_axis) { input_report_rel(encoder->input, @@ -140,36 +142,89 @@ static irqreturn_t rotary_encoder_half_period_irq(int irq, void *dev_id) return IRQ_HANDLED; } +#ifdef CONFIG_OF +static struct of_device_id rotary_encoder_of_match[] = { + { .compatible = "rotary-encoder", }, + { }, +}; +MODULE_DEVICE_TABLE(of, rotary_encoder_of_match); + +static struct rotary_encoder_platform_data * __devinit +rotary_encoder_parse_dt(struct device *dev) +{ + const struct of_device_id *of_id = + of_match_device(rotary_encoder_of_match, dev); + struct device_node *np = dev->of_node; + struct rotary_encoder_platform_data *pdata; + enum of_gpio_flags flags; + + if (!of_id || !np) + return NULL; + + pdata = kzalloc(sizeof(struct rotary_encoder_platform_data), + GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + of_property_read_u32(np, "rotary-encoder,steps", &pdata->steps); + of_property_read_u32(np, "linux,axis", &pdata->axis); + + pdata->gpio_a = of_get_gpio_flags(np, 0, &flags); + pdata->inverted_a = flags & OF_GPIO_ACTIVE_LOW; + + pdata->gpio_b = of_get_gpio_flags(np, 1, &flags); + pdata->inverted_b = flags & OF_GPIO_ACTIVE_LOW; + + pdata->relative_axis = !!of_get_property(np, + "rotary-encoder,relative-axis", NULL); + pdata->rollover = !!of_get_property(np, + "rotary-encoder,rollover", NULL); + pdata->half_period = !!of_get_property(np, + "rotary-encoder,half-period", NULL); + + return pdata; +} +#else +static inline struct rotary_encoder_platform_data * +rotary_encoder_parse_dt(struct device *dev) +{ + return NULL; +} +#endif + static int __devinit rotary_encoder_probe(struct platform_device *pdev) { - struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data; + struct device *dev = &pdev->dev; + const struct rotary_encoder_platform_data *pdata = dev_get_platdata(dev); struct rotary_encoder *encoder; struct input_dev *input; irq_handler_t handler; int err; if (!pdata) { - dev_err(&pdev->dev, "missing platform data\n"); - return -ENOENT; + pdata = rotary_encoder_parse_dt(dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + + if (!pdata) { + dev_err(dev, "missing platform data\n"); + return -EINVAL; + } } encoder = kzalloc(sizeof(struct rotary_encoder), GFP_KERNEL); input = input_allocate_device(); if (!encoder || !input) { - dev_err(&pdev->dev, "failed to allocate memory for device\n"); err = -ENOMEM; goto exit_free_mem; } encoder->input = input; encoder->pdata = pdata; - encoder->irq_a = gpio_to_irq(pdata->gpio_a); - encoder->irq_b = gpio_to_irq(pdata->gpio_b); - /* create and register the input driver */ input->name = pdev->name; input->id.bustype = BUS_HOST; - input->dev.parent = &pdev->dev; + input->dev.parent = dev; if (pdata->relative_axis) { input->evbit[0] = BIT_MASK(EV_REL); @@ -180,40 +235,21 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev) pdata->axis, 0, pdata->steps, 0, 1); } - err = input_register_device(input); - if (err) { - dev_err(&pdev->dev, "failed to register input device\n"); - goto exit_free_mem; - } - /* request the GPIOs */ - err = gpio_request(pdata->gpio_a, DRV_NAME); - if (err) { - dev_err(&pdev->dev, "unable to request GPIO %d\n", - pdata->gpio_a); - goto exit_unregister_input; - } - - err = gpio_direction_input(pdata->gpio_a); + err = gpio_request_one(pdata->gpio_a, GPIOF_IN, dev_name(dev)); if (err) { - dev_err(&pdev->dev, "unable to set GPIO %d for input\n", - pdata->gpio_a); - goto exit_unregister_input; + dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_a); + goto exit_free_mem; } - err = gpio_request(pdata->gpio_b, DRV_NAME); + err = gpio_request_one(pdata->gpio_b, GPIOF_IN, dev_name(dev)); if (err) { - dev_err(&pdev->dev, "unable to request GPIO %d\n", - pdata->gpio_b); + dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_b); goto exit_free_gpio_a; } - err = gpio_direction_input(pdata->gpio_b); - if (err) { - dev_err(&pdev->dev, "unable to set GPIO %d for input\n", - pdata->gpio_b); - goto exit_free_gpio_a; - } + encoder->irq_a = gpio_to_irq(pdata->gpio_a); + encoder->irq_b = gpio_to_irq(pdata->gpio_b); /* request the IRQs */ if (pdata->half_period) { @@ -227,8 +263,7 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev) IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, DRV_NAME, encoder); if (err) { - dev_err(&pdev->dev, "unable to request IRQ %d\n", - encoder->irq_a); + dev_err(dev, "unable to request IRQ %d\n", encoder->irq_a); goto exit_free_gpio_b; } @@ -236,43 +271,55 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev) IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, DRV_NAME, encoder); if (err) { - dev_err(&pdev->dev, "unable to request IRQ %d\n", - encoder->irq_b); + dev_err(dev, "unable to request IRQ %d\n", encoder->irq_b); goto exit_free_irq_a; } + err = input_register_device(input); + if (err) { + dev_err(dev, "failed to register input device\n"); + goto exit_free_irq_b; + } + platform_set_drvdata(pdev, encoder); return 0; +exit_free_irq_b: + free_irq(encoder->irq_b, encoder); exit_free_irq_a: free_irq(encoder->irq_a, encoder); exit_free_gpio_b: gpio_free(pdata->gpio_b); exit_free_gpio_a: gpio_free(pdata->gpio_a); -exit_unregister_input: - input_unregister_device(input); - input = NULL; /* so we don't try to free it */ exit_free_mem: input_free_device(input); kfree(encoder); + if (!dev_get_platdata(&pdev->dev)) + kfree(pdata); + return err; } static int __devexit rotary_encoder_remove(struct platform_device *pdev) { struct rotary_encoder *encoder = platform_get_drvdata(pdev); - struct rotary_encoder_platform_data *pdata = pdev->dev.platform_data; + const struct rotary_encoder_platform_data *pdata = encoder->pdata; free_irq(encoder->irq_a, encoder); free_irq(encoder->irq_b, encoder); gpio_free(pdata->gpio_a); gpio_free(pdata->gpio_b); + input_unregister_device(encoder->input); - platform_set_drvdata(pdev, NULL); kfree(encoder); + if (!dev_get_platdata(&pdev->dev)) + kfree(pdata); + + platform_set_drvdata(pdev, NULL); + return 0; } @@ -282,6 +329,7 @@ static struct platform_driver rotary_encoder_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, + .of_match_table = of_match_ptr(rotary_encoder_of_match), } }; module_platform_driver(rotary_encoder_driver); diff --git a/drivers/input/misc/twl4030-pwrbutton.c b/drivers/input/misc/twl4030-pwrbutton.c index 38e4b507b94c..b3dd96d6448b 100644 --- a/drivers/input/misc/twl4030-pwrbutton.c +++ b/drivers/input/misc/twl4030-pwrbutton.c @@ -42,6 +42,7 @@ static irqreturn_t powerbutton_irq(int irq, void *_pwr) err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS); if (!err) { + pm_wakeup_event(pwr->dev.parent, 0); input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ); input_sync(pwr); } else { diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c index 6b1797503e34..a0a4bbaef02c 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -40,7 +40,8 @@ #include <linux/input/mt.h> #include "../input-compat.h" -static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) +static int uinput_dev_event(struct input_dev *dev, + unsigned int type, unsigned int code, int value) { struct uinput_device *udev = input_get_drvdata(dev); @@ -56,10 +57,11 @@ static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned i } /* Atomically allocate an ID for the given request. Returns 0 on success. */ -static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) +static bool uinput_request_alloc_id(struct uinput_device *udev, + struct uinput_request *request) { - int id; - int err = -1; + unsigned int id; + bool reserved = false; spin_lock(&udev->requests_lock); @@ -67,32 +69,35 @@ static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_req if (!udev->requests[id]) { request->id = id; udev->requests[id] = request; - err = 0; + reserved = true; break; } } spin_unlock(&udev->requests_lock); - return err; + return reserved; } -static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id) +static struct uinput_request *uinput_request_find(struct uinput_device *udev, + unsigned int id) { /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ - if (id >= UINPUT_NUM_REQUESTS || id < 0) + if (id >= UINPUT_NUM_REQUESTS) return NULL; return udev->requests[id]; } -static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) +static int uinput_request_reserve_slot(struct uinput_device *udev, + struct uinput_request *request) { /* Allocate slot. If none are available right away, wait. */ return wait_event_interruptible(udev->requests_waitq, - !uinput_request_alloc_id(udev, request)); + uinput_request_alloc_id(udev, request)); } -static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) +static void uinput_request_done(struct uinput_device *udev, + struct uinput_request *request) { /* Mark slot as available */ udev->requests[request->id] = NULL; @@ -101,14 +106,11 @@ static void uinput_request_done(struct uinput_device *udev, struct uinput_reques complete(&request->done); } -static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request) +static int uinput_request_send(struct uinput_device *udev, + struct uinput_request *request) { int retval; - retval = uinput_request_reserve_slot(udev, request); - if (retval) - return retval; - retval = mutex_lock_interruptible(&udev->mutex); if (retval) return retval; @@ -118,7 +120,12 @@ static int uinput_request_submit(struct uinput_device *udev, struct uinput_reque goto out; } - /* Tell our userspace app about this new request by queueing an input event */ + init_completion(&request->done); + + /* + * Tell our userspace application about this new request + * by queueing an input event. + */ uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); out: @@ -126,8 +133,27 @@ static int uinput_request_submit(struct uinput_device *udev, struct uinput_reque return retval; } +static int uinput_request_submit(struct uinput_device *udev, + struct uinput_request *request) +{ + int error; + + error = uinput_request_reserve_slot(udev, request); + if (error) + return error; + + error = uinput_request_send(udev, request); + if (error) { + uinput_request_done(udev, request); + return error; + } + + wait_for_completion(&request->done); + return request->retval; +} + /* - * Fail all ouitstanding requests so handlers don't wait for the userspace + * Fail all outstanding requests so handlers don't wait for the userspace * to finish processing them. */ static void uinput_flush_requests(struct uinput_device *udev) @@ -163,11 +189,12 @@ static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) return uinput_dev_event(dev, EV_FF, effect_id, value); } -static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old) +static int uinput_dev_upload_effect(struct input_dev *dev, + struct ff_effect *effect, + struct ff_effect *old) { struct uinput_device *udev = input_get_drvdata(dev); struct uinput_request request; - int retval; /* * uinput driver does not currently support periodic effects with @@ -180,42 +207,25 @@ static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *eff effect->u.periodic.waveform == FF_CUSTOM) return -EINVAL; - request.id = -1; - init_completion(&request.done); request.code = UI_FF_UPLOAD; request.u.upload.effect = effect; request.u.upload.old = old; - retval = uinput_request_submit(udev, &request); - if (!retval) { - wait_for_completion(&request.done); - retval = request.retval; - } - - return retval; + return uinput_request_submit(udev, &request); } static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) { struct uinput_device *udev = input_get_drvdata(dev); struct uinput_request request; - int retval; if (!test_bit(EV_FF, dev->evbit)) return -ENOSYS; - request.id = -1; - init_completion(&request.done); request.code = UI_FF_ERASE; request.u.effect_id = effect_id; - retval = uinput_request_submit(udev, &request); - if (!retval) { - wait_for_completion(&request.done); - retval = request.retval; - } - - return retval; + return uinput_request_submit(udev, &request); } static void uinput_destroy_device(struct uinput_device *udev) @@ -347,7 +357,8 @@ static int uinput_allocate_device(struct uinput_device *udev) return 0; } -static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) +static int uinput_setup_device(struct uinput_device *udev, + const char __user *buffer, size_t count) { struct uinput_user_dev *user_dev; struct input_dev *dev; @@ -419,7 +430,8 @@ static int uinput_setup_device(struct uinput_device *udev, const char __user *bu return retval; } -static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) +static ssize_t uinput_inject_event(struct uinput_device *udev, + const char __user *buffer, size_t count) { struct input_event ev; @@ -434,11 +446,15 @@ static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char return input_event_size(); } -static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) +static ssize_t uinput_write(struct file *file, const char __user *buffer, + size_t count, loff_t *ppos) { struct uinput_device *udev = file->private_data; int retval; + if (count == 0) + return 0; + retval = mutex_lock_interruptible(&udev->mutex); if (retval) return retval; @@ -452,42 +468,74 @@ static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t return retval; } -static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) +static bool uinput_fetch_next_event(struct uinput_device *udev, + struct input_event *event) { - struct uinput_device *udev = file->private_data; - int retval = 0; + bool have_event; - if (udev->state != UIST_CREATED) - return -ENODEV; + spin_lock_irq(&udev->dev->event_lock); - if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) - return -EAGAIN; + have_event = udev->head != udev->tail; + if (have_event) { + *event = udev->buff[udev->tail]; + udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; + } - retval = wait_event_interruptible(udev->waitq, - udev->head != udev->tail || udev->state != UIST_CREATED); - if (retval) - return retval; + spin_unlock_irq(&udev->dev->event_lock); - retval = mutex_lock_interruptible(&udev->mutex); - if (retval) - return retval; + return have_event; +} - if (udev->state != UIST_CREATED) { - retval = -ENODEV; - goto out; - } +static ssize_t uinput_events_to_user(struct uinput_device *udev, + char __user *buffer, size_t count) +{ + struct input_event event; + size_t read = 0; - while (udev->head != udev->tail && retval + input_event_size() <= count) { - if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { - retval = -EFAULT; - goto out; - } - udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; - retval += input_event_size(); + while (read + input_event_size() <= count && + uinput_fetch_next_event(udev, &event)) { + + if (input_event_to_user(buffer + read, &event)) + return -EFAULT; + + read += input_event_size(); } - out: - mutex_unlock(&udev->mutex); + return read; +} + +static ssize_t uinput_read(struct file *file, char __user *buffer, + size_t count, loff_t *ppos) +{ + struct uinput_device *udev = file->private_data; + ssize_t retval; + + if (count != 0 && count < input_event_size()) + return -EINVAL; + + do { + retval = mutex_lock_interruptible(&udev->mutex); + if (retval) + return retval; + + if (udev->state != UIST_CREATED) + retval = -ENODEV; + else if (udev->head == udev->tail && + (file->f_flags & O_NONBLOCK)) + retval = -EAGAIN; + else + retval = uinput_events_to_user(udev, buffer, count); + + mutex_unlock(&udev->mutex); + + if (retval || count == 0) + break; + + if (!(file->f_flags & O_NONBLOCK)) + retval = wait_event_interruptible(udev->waitq, + udev->head != udev->tail || + udev->state != UIST_CREATED); + } while (retval == 0); return retval; } @@ -516,8 +564,8 @@ static int uinput_release(struct inode *inode, struct file *file) #ifdef CONFIG_COMPAT struct uinput_ff_upload_compat { - int request_id; - int retval; + __u32 request_id; + __s32 retval; struct ff_effect_compat effect; struct ff_effect_compat old; }; @@ -703,7 +751,8 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, break; req = uinput_request_find(udev, ff_up.request_id); - if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { + if (!req || req->code != UI_FF_UPLOAD || + !req->u.upload.effect) { retval = -EINVAL; break; } @@ -786,7 +835,8 @@ static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) } #ifdef CONFIG_COMPAT -static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +static long uinput_compat_ioctl(struct file *file, + unsigned int cmd, unsigned long arg) { return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); } @@ -831,4 +881,3 @@ MODULE_VERSION("0.3"); module_init(uinput_init); module_exit(uinput_exit); - |