diff options
| -rw-r--r-- | drivers/input/evdev.c | 99 | ||||
| -rw-r--r-- | drivers/input/input.c | 114 | ||||
| -rw-r--r-- | drivers/input/joydev.c | 88 | ||||
| -rw-r--r-- | drivers/input/keyboard/samsung-keypad.c | 11 | ||||
| -rw-r--r-- | drivers/input/mousedev.c | 224 | ||||
| -rw-r--r-- | drivers/input/tablet/wacom_sys.c | 145 | ||||
| -rw-r--r-- | drivers/input/tablet/wacom_wac.c | 30 | ||||
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 6 | ||||
| -rw-r--r-- | include/linux/input.h | 10 |
9 files changed, 382 insertions, 345 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 118d0300f1fb..6ae2ac47c9c8 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -23,11 +23,11 @@ #include <linux/input/mt.h> #include <linux/major.h> #include <linux/device.h> +#include <linux/cdev.h> #include "input-compat.h" struct evdev { int open; - int minor; struct input_handle handle; wait_queue_head_t wait; struct evdev_client __rcu *grab; @@ -35,6 +35,7 @@ struct evdev { spinlock_t client_lock; /* protects client_list */ struct mutex mutex; struct device dev; + struct cdev cdev; bool exist; }; @@ -51,9 +52,6 @@ struct evdev_client { struct input_event buffer[]; }; -static struct evdev *evdev_table[EVDEV_MINORS]; -static DEFINE_MUTEX(evdev_table_mutex); - static void __pass_event(struct evdev_client *client, const struct input_event *event) { @@ -310,35 +308,16 @@ static unsigned int evdev_compute_buffer_size(struct input_dev *dev) static int evdev_open(struct inode *inode, struct file *file) { - struct evdev *evdev; + struct evdev *evdev = container_of(inode->i_cdev, struct evdev, cdev); + unsigned int bufsize = evdev_compute_buffer_size(evdev->handle.dev); struct evdev_client *client; - int i = iminor(inode) - EVDEV_MINOR_BASE; - unsigned int bufsize; int error; - if (i >= EVDEV_MINORS) - return -ENODEV; - - error = mutex_lock_interruptible(&evdev_table_mutex); - if (error) - return error; - evdev = evdev_table[i]; - if (evdev) - get_device(&evdev->dev); - mutex_unlock(&evdev_table_mutex); - - if (!evdev) - return -ENODEV; - - bufsize = evdev_compute_buffer_size(evdev->handle.dev); - client = kzalloc(sizeof(struct evdev_client) + bufsize * sizeof(struct input_event), GFP_KERNEL); - if (!client) { - error = -ENOMEM; - goto err_put_evdev; - } + if (!client) + return -ENOMEM; client->bufsize = bufsize; spin_lock_init(&client->buffer_lock); @@ -352,13 +331,12 @@ static int evdev_open(struct inode *inode, struct file *file) file->private_data = client; nonseekable_open(inode, file); + get_device(&evdev->dev); return 0; err_free_client: evdev_detach_client(evdev, client); kfree(client); - err_put_evdev: - put_device(&evdev->dev); return error; } @@ -942,26 +920,6 @@ static const struct file_operations evdev_fops = { .llseek = no_llseek, }; -static int evdev_install_chrdev(struct evdev *evdev) -{ - /* - * No need to do any locking here as calls to connect and - * disconnect are serialized by the input core - */ - evdev_table[evdev->minor] = evdev; - return 0; -} - -static void evdev_remove_chrdev(struct evdev *evdev) -{ - /* - * Lock evdev table to prevent race with evdev_open() - */ - mutex_lock(&evdev_table_mutex); - evdev_table[evdev->minor] = NULL; - mutex_unlock(&evdev_table_mutex); -} - /* * Mark device non-existent. This disables writes, ioctls and * prevents new users from opening the device. Already posted @@ -980,7 +938,8 @@ static void evdev_cleanup(struct evdev *evdev) evdev_mark_dead(evdev); evdev_hangup(evdev); - evdev_remove_chrdev(evdev); + + cdev_del(&evdev->cdev); /* evdev is marked dead so no one else accesses evdev->open */ if (evdev->open) { @@ -991,43 +950,47 @@ static void evdev_cleanup(struct evdev *evdev) /* * Create new evdev device. Note that input core serializes calls - * to connect and disconnect so we don't need to lock evdev_table here. + * to connect and disconnect. */ static int evdev_connect(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id) { struct evdev *evdev; int minor; + int dev_no; int error; - for (minor = 0; minor < EVDEV_MINORS; minor++) - if (!evdev_table[minor]) - break; - - if (minor == EVDEV_MINORS) { - pr_err("no more free evdev devices\n"); - return -ENFILE; + minor = input_get_new_minor(EVDEV_MINOR_BASE, EVDEV_MINORS, true); + if (minor < 0) { + error = minor; + pr_err("failed to reserve new minor: %d\n", error); + return error; } evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL); - if (!evdev) - return -ENOMEM; + if (!evdev) { + error = -ENOMEM; + goto err_free_minor; + } INIT_LIST_HEAD(&evdev->client_list); spin_lock_init(&evdev->client_lock); mutex_init(&evdev->mutex); init_waitqueue_head(&evdev->wait); - - dev_set_name(&evdev->dev, "event%d", minor); evdev->exist = true; - evdev->minor = minor; + + dev_no = minor; + /* Normalize device number if it falls into legacy range */ + if (dev_no < EVDEV_MINOR_BASE + EVDEV_MINORS) + dev_no -= EVDEV_MINOR_BASE; + dev_set_name(&evdev->dev, "event%d", dev_no); evdev->handle.dev = input_get_device(dev); evdev->handle.name = dev_name(&evdev->dev); evdev->handle.handler = handler; evdev->handle.private = evdev; - evdev->dev.devt = MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor); + evdev->dev.devt = MKDEV(INPUT_MAJOR, minor); evdev->dev.class = &input_class; evdev->dev.parent = &dev->dev; evdev->dev.release = evdev_free; @@ -1037,7 +1000,8 @@ static int evdev_connect(struct input_handler *handler, struct input_dev *dev, if (error) goto err_free_evdev; - error = evdev_install_chrdev(evdev); + cdev_init(&evdev->cdev, &evdev_fops); + error = cdev_add(&evdev->cdev, evdev->dev.devt, 1); if (error) goto err_unregister_handle; @@ -1053,6 +1017,8 @@ static int evdev_connect(struct input_handler *handler, struct input_dev *dev, input_unregister_handle(&evdev->handle); err_free_evdev: put_device(&evdev->dev); + err_free_minor: + input_free_minor(minor); return error; } @@ -1062,6 +1028,7 @@ static void evdev_disconnect(struct input_handle *handle) device_del(&evdev->dev); evdev_cleanup(evdev); + input_free_minor(MINOR(evdev->dev.devt)); input_unregister_handle(handle); put_device(&evdev->dev); } @@ -1078,7 +1045,7 @@ static struct input_handler evdev_handler = { .events = evdev_events, .connect = evdev_connect, .disconnect = evdev_disconnect, - .fops = &evdev_fops, + .legacy_minors = true, .minor = EVDEV_MINOR_BASE, .name = "evdev", .id_table = evdev_ids, diff --git a/drivers/input/input.c b/drivers/input/input.c index ace3f7c4226d..53a0ddee7872 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -14,6 +14,7 @@ #include <linux/init.h> #include <linux/types.h> +#include <linux/idr.h> #include <linux/input/mt.h> #include <linux/module.h> #include <linux/slab.h> @@ -32,7 +33,9 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); MODULE_DESCRIPTION("Input core"); MODULE_LICENSE("GPL"); -#define INPUT_DEVICES 256 +#define INPUT_MAX_CHAR_DEVICES 1024 +#define INPUT_FIRST_DYNAMIC_DEV 256 +static DEFINE_IDA(input_ida); static LIST_HEAD(input_dev_list); static LIST_HEAD(input_handler_list); @@ -45,8 +48,6 @@ static LIST_HEAD(input_handler_list); */ static DEFINE_MUTEX(input_mutex); -static struct input_handler *input_table[8]; - static const struct input_value input_value_sync = { EV_SYN, SYN_REPORT, 1 }; static inline int is_event_supported(unsigned int code, @@ -1218,7 +1219,7 @@ static int input_handlers_seq_show(struct seq_file *seq, void *v) seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); if (handler->filter) seq_puts(seq, " (filter)"); - if (handler->fops) + if (handler->legacy_minors) seq_printf(seq, " Minor=%d", handler->minor); seq_putc(seq, '\n'); @@ -2016,22 +2017,14 @@ EXPORT_SYMBOL(input_unregister_device); int input_register_handler(struct input_handler *handler) { struct input_dev *dev; - int retval; + int error; - retval = mutex_lock_interruptible(&input_mutex); - if (retval) - return retval; + error = mutex_lock_interruptible(&input_mutex); + if (error) + return error; INIT_LIST_HEAD(&handler->h_list); - if (handler->fops != NULL) { - if (input_table[handler->minor >> 5]) { - retval = -EBUSY; - goto out; - } - input_table[handler->minor >> 5] = handler; - } - list_add_tail(&handler->node, &input_handler_list); list_for_each_entry(dev, &input_dev_list, node) @@ -2039,9 +2032,8 @@ int input_register_handler(struct input_handler *handler) input_wakeup_procfs_readers(); - out: mutex_unlock(&input_mutex); - return retval; + return 0; } EXPORT_SYMBOL(input_register_handler); @@ -2064,9 +2056,6 @@ void input_unregister_handler(struct input_handler *handler) list_del_init(&handler->node); - if (handler->fops != NULL) - input_table[handler->minor >> 5] = NULL; - input_wakeup_procfs_readers(); mutex_unlock(&input_mutex); @@ -2183,51 +2172,52 @@ void input_unregister_handle(struct input_handle *handle) } EXPORT_SYMBOL(input_unregister_handle); -static int input_open_file(struct inode *inode, struct file *file) +/** + * input_get_new_minor - allocates a new input minor number + * @legacy_base: beginning or the legacy range to be searched + * @legacy_num: size of legacy range + * @allow_dynamic: whether we can also take ID from the dynamic range + * + * This function allocates a new device minor for from input major namespace. + * Caller can request legacy minor by specifying @legacy_base and @legacy_num + * parameters and whether ID can be allocated from dynamic range if there are + * no free IDs in legacy range. + */ +int input_get_new_minor(int legacy_base, unsigned int legacy_num, + bool allow_dynamic) { - struct input_handler *handler; - const struct file_operations *old_fops, *new_fops = NULL; - int err; - - err = mutex_lock_interruptible(&input_mutex); - if (err) - return err; - - /* No load-on-demand here? */ - handler = input_table[iminor(inode) >> 5]; - if (handler) - new_fops = fops_get(handler->fops); - - mutex_unlock(&input_mutex); - /* - * That's _really_ odd. Usually NULL ->open means "nothing special", - * not "no device". Oh, well... + * This function should be called from input handler's ->connect() + * methods, which are serialized with input_mutex, so no additional + * locking is needed here. */ - if (!new_fops || !new_fops->open) { - fops_put(new_fops); - err = -ENODEV; - goto out; + if (legacy_base >= 0) { + int minor = ida_simple_get(&input_ida, + legacy_base, + legacy_base + legacy_num, + GFP_KERNEL); + if (minor >= 0 || !allow_dynamic) + return minor; } - old_fops = file->f_op; - file->f_op = new_fops; - - err = new_fops->open(inode, file); - if (err) { - fops_put(file->f_op); - file->f_op = fops_get(old_fops); - } - fops_put(old_fops); -out: - return err; + return ida_simple_get(&input_ida, + INPUT_FIRST_DYNAMIC_DEV, INPUT_MAX_CHAR_DEVICES, + GFP_KERNEL); } +EXPORT_SYMBOL(input_get_new_minor); -static const struct file_operations input_fops = { - .owner = THIS_MODULE, - .open = input_open_file, - .llseek = noop_llseek, -}; +/** + * input_free_minor - release previously allocated minor + * @minor: minor to be released + * + * This function releases previously allocated input minor so that it can be + * reused later. + */ +void input_free_minor(unsigned int minor) +{ + ida_simple_remove(&input_ida, minor); +} +EXPORT_SYMBOL(input_free_minor); static int __init input_init(void) { @@ -2243,7 +2233,8 @@ static int __init input_init(void) if (err) goto fail1; - err = register_chrdev(INPUT_MAJOR, "input", &input_fops); + err = register_chrdev_region(MKDEV(INPUT_MAJOR, 0), + INPUT_MAX_CHAR_DEVICES, "input"); if (err) { pr_err("unable to register char major %d", INPUT_MAJOR); goto fail2; @@ -2259,7 +2250,8 @@ static int __init input_init(void) static void __exit input_exit(void) { input_proc_exit(); - unregister_chrdev(INPUT_MAJOR, "input"); + unregister_chrdev_region(MKDEV(INPUT_MAJOR, 0), + INPUT_MAX_CHAR_DEVICES); class_unregister(&input_class); } diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c index 78f323ea1e4b..b62b5891f399 100644 --- a/drivers/input/joydev.c +++ b/drivers/input/joydev.c @@ -27,6 +27,7 @@ #include <linux/poll.h> #include <linux/init.h> #include <linux/device.h> +#include <linux/cdev.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); MODULE_DESCRIPTION("Joystick device interfaces"); @@ -39,13 +40,13 @@ MODULE_LICENSE("GPL"); struct joydev { int open; - int minor; struct input_handle handle; wait_queue_head_t wait; struct list_head client_list; spinlock_t client_lock; /* protects client_list */ struct mutex mutex; struct device dev; + struct cdev cdev; bool exist; struct js_corr corr[ABS_CNT]; @@ -70,9 +71,6 @@ struct joydev_client { struct list_head node; }; -static struct joydev *joydev_table[JOYDEV_MINORS]; -static DEFINE_MUTEX(joydev_table_mutex); - static int joydev_correct(int value, struct js_corr *corr) { switch (corr->type) { @@ -252,30 +250,14 @@ static int joydev_release(struct inode *inode, struct file *file) static int joydev_open(struct inode *inode, struct file *file) { + struct joydev *joydev = + container_of(inode->i_cdev, struct joydev, cdev); struct joydev_client *client; - struct joydev *joydev; - int i = iminor(inode) - JOYDEV_MINOR_BASE; int error; - if (i >= JOYDEV_MINORS) - return -ENODEV; - - error = mutex_lock_interruptible(&joydev_table_mutex); - if (error) - return error; - joydev = joydev_table[i]; - if (joydev) - get_device(&joydev->dev); - mutex_unlock(&joydev_table_mutex); - - if (!joydev) - return -ENODEV; - client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL); - if (!client) { - error = -ENOMEM; - goto err_put_joydev; - } + if (!client) + return -ENOMEM; spin_lock_init(&client->buffer_lock); client->joydev = joydev; @@ -288,13 +270,12 @@ static int joydev_open(struct inode *inode, struct file *file) file->private_data = client; nonseekable_open(inode, file); + get_device(&joydev->dev); return 0; err_free_client: joydev_detach_client(joydev, client); kfree(client); - err_put_joydev: - put_device(&joydev->dev); return error; } @@ -742,19 +723,6 @@ static const struct file_operations joydev_fops = { .llseek = no_llseek, }; -static int joydev_install_chrdev(struct joydev *joydev) -{ - joydev_table[joydev->minor] = joydev; - return 0; -} - -static void joydev_remove_chrdev(struct joydev *joydev) -{ - mutex_lock(&joydev_table_mutex); - joydev_table[joydev->minor] = NULL; - mutex_unlock(&joydev_table_mutex); -} - /* * Mark device non-existent. This disables writes, ioctls and * prevents new users from opening the device. Already posted @@ -773,7 +741,8 @@ static void joydev_cleanup(struct joydev *joydev) joydev_mark_dead(joydev); joydev_hangup(joydev); - joydev_remove_chrdev(joydev); + + cdev_del(&joydev->cdev); /* joydev is marked dead so no one else accesses joydev->open */ if (joydev->open) @@ -798,30 +767,33 @@ static int joydev_connect(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id) { struct joydev *joydev; - int i, j, t, minor; + int i, j, t, minor, dev_no; int error; - for (minor = 0; minor < JOYDEV_MINORS; minor++) - if (!joydev_table[minor]) - break; - - if (minor == JOYDEV_MINORS) { - pr_err("no more free joydev devices\n"); - return -ENFILE; + minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true); + if (minor < 0) { + error = minor; + pr_err("failed to reserve new minor: %d\n", error); + return error; } joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL); - if (!joydev) - return -ENOMEM; + if (!joydev) { + error = -ENOMEM; + goto err_free_minor; + } INIT_LIST_HEAD(&joydev->client_list); spin_lock_init(&joydev->client_lock); mutex_init(&joydev->mutex); init_waitqueue_head(&joydev->wait); - - dev_set_name(&joydev->dev, "js%d", minor); joydev->exist = true; - joydev->minor = minor; + + dev_no = minor; + /* Normalize device number if it falls into legacy range */ + if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS) + dev_no -= JOYDEV_MINOR_BASE; + dev_set_name(&joydev->dev, "js%d", dev_no); joydev->handle.dev = input_get_device(dev); joydev->handle.name = dev_name(&joydev->dev); @@ -875,7 +847,7 @@ static int joydev_connect(struct input_handler *handler, struct input_dev *dev, } } - joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor); + joydev->dev.devt = MKDEV(INPUT_MAJOR, minor); joydev->dev.class = &input_class; joydev->dev.parent = &dev->dev; joydev->dev.release = joydev_free; @@ -885,7 +857,8 @@ static int joydev_connect(struct input_handler *handler, struct input_dev *dev, if (error) goto err_free_joydev; - error = joydev_install_chrdev(joydev); + cdev_init(&joydev->cdev, &joydev_fops); + error = cdev_add(&joydev->cdev, joydev->dev.devt, 1); if (error) goto err_unregister_handle; @@ -901,6 +874,8 @@ static int joydev_connect(struct input_handler *handler, struct input_dev *dev, input_unregister_handle(&joydev->handle); err_free_joydev: put_device(&joydev->dev); + err_free_minor: + input_free_minor(minor); return error; } @@ -910,6 +885,7 @@ static void joydev_disconnect(struct input_handle *handle) device_del(&joydev->dev); joydev_cleanup(joydev); + input_free_minor(MINOR(joydev->dev.devt)); input_unregister_handle(handle); put_device(&joydev->dev); } @@ -961,7 +937,7 @@ static struct input_handler joydev_handler = { .match = joydev_match, .connect = joydev_connect, .disconnect = joydev_disconnect, - .fops = &joydev_fops, + .legacy_minors = true, .minor = JOYDEV_MINOR_BASE, .name = "joydev", .id_table = joydev_ids, diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c index 277e26dc910e..9d7a111486f7 100644 --- a/drivers/input/keyboard/samsung-keypad.c +++ b/drivers/input/keyboard/samsung-keypad.c @@ -431,6 +431,12 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) goto err_unmap_base; } + error = clk_prepare(keypad->clk); + if (error) { + dev_err(&pdev->dev, "keypad clock prepare failed\n"); + goto err_put_clk; + } + keypad->input_dev = input_dev; keypad->pdev = pdev; keypad->row_shift = row_shift; @@ -461,7 +467,7 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) keypad->keycodes, input_dev); if (error) { dev_err(&pdev->dev, "failed to build keymap\n"); - goto err_put_clk; + goto err_unprepare_clk; } input_set_capability(input_dev, EV_MSC, MSC_SCAN); @@ -503,6 +509,8 @@ err_free_irq: pm_runtime_disable(&pdev->dev); device_init_wakeup(&pdev->dev, 0); platform_set_drvdata(pdev, NULL); +err_unprepare_clk: + clk_unprepare(keypad->clk); err_put_clk: clk_put(keypad->clk); samsung_keypad_dt_gpio_free(keypad); @@ -531,6 +539,7 @@ static int __devexit samsung_keypad_remove(struct platform_device *pdev) */ free_irq(keypad->irq, keypad); + clk_unprepare(keypad->clk); clk_put(keypad->clk); samsung_keypad_dt_gpio_free(keypad); diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c index 964e43d81e29..a1b4c37956b2 100644 --- a/drivers/input/mousedev.c +++ b/drivers/input/mousedev.c @@ -24,10 +24,8 @@ #include <linux/random.h> #include <linux/major.h> #include <linux/device.h> +#include <linux/cdev.h> #include <linux/kernel.h> -#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX -#include <linux/miscdevice.h> -#endif MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); @@ -61,17 +59,18 @@ struct mousedev_hw_data { struct mousedev { int open; - int minor; struct input_handle handle; wait_queue_head_t wait; struct list_head client_list; spinlock_t client_lock; /* protects client_list */ struct mutex mutex; struct device dev; + struct cdev cdev; bool exist; + bool is_mixdev; struct list_head mixdev_node; - int mixdev_open; + bool opened_by_mixdev; struct mousedev_hw_data packet; unsigned int pkt_count; @@ -114,10 +113,6 @@ struct mousedev_client { static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; -static struct input_handler mousedev_handler; - -static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; -static DEFINE_MUTEX(mousedev_table_mutex); static struct mousedev *mousedev_mix; static LIST_HEAD(mousedev_mix_list); @@ -433,7 +428,7 @@ static int mousedev_open_device(struct mousedev *mousedev) if (retval) return retval; - if (mousedev->minor == MOUSEDEV_MIX) + if (mousedev->is_mixdev) mixdev_open_devices(); else if (!mousedev->exist) retval = -ENODEV; @@ -451,7 +446,7 @@ static void mousedev_close_device(struct mousedev *mousedev) { mutex_lock(&mousedev->mutex); - if (mousedev->minor == MOUSEDEV_MIX) + if (mousedev->is_mixdev) mixdev_close_devices(); else if (mousedev->exist && !--mousedev->open) input_close_device(&mousedev->handle); @@ -472,11 +467,11 @@ static void mixdev_open_devices(void) return; list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { - if (!mousedev->mixdev_open) { + if (!mousedev->opened_by_mixdev) { if (mousedev_open_device(mousedev)) continue; - mousedev->mixdev_open = 1; + mousedev->opened_by_mixdev = true; } } } @@ -494,8 +489,8 @@ static void mixdev_close_devices(void) return; list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { - if (mousedev->mixdev_open) { - mousedev->mixdev_open = 0; + if (mousedev->opened_by_mixdev) { + mousedev->opened_by_mixdev = false; mousedev_close_device(mousedev); } } @@ -538,35 +533,17 @@ static int mousedev_open(struct inode *inode, struct file *file) struct mousedev_client *client; struct mousedev *mousedev; int error; - int i; #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX if (imajor(inode) == MISC_MAJOR) - i = MOUSEDEV_MIX; + mousedev = mousedev_mix; else #endif - i = iminor(inode) - MOUSEDEV_MINOR_BASE; - - if (i >= MOUSEDEV_MINORS) - return -ENODEV; - - error = mutex_lock_interruptible(&mousedev_table_mutex); - if (error) - return error; - - mousedev = mousedev_table[i]; - if (mousedev) - get_device(&mousedev->dev); - mutex_unlock(&mousedev_table_mutex); - - if (!mousedev) - return -ENODEV; + mousedev = container_of(inode->i_cdev, struct mousedev, cdev); client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); - if (!client) { - error = -ENOMEM; - goto err_put_mousedev; - } + if (!client) + return -ENOMEM; spin_lock_init(&client->packet_lock); client->pos_x = xres / 2; @@ -579,13 +556,14 @@ static int mousedev_open(struct inode *inode, struct file *file) goto err_free_client; file->private_data = client; + nonseekable_open(inode, file); + + get_device(&mousedev->dev); return 0; err_free_client: mousedev_detach_client(mousedev, client); kfree(client); - err_put_mousedev: - put_device(&mousedev->dev); return error; } @@ -785,29 +763,16 @@ static unsigned int mousedev_poll(struct file *file, poll_table *wait) } static const struct file_operations mousedev_fops = { - .owner = THIS_MODULE, - .read = mousedev_read, - .write = mousedev_write, - .poll = mousedev_poll, - .open = mousedev_open, - .release = mousedev_release, - .fasync = mousedev_fasync, - .llseek = noop_llseek, + .owner = THIS_MODULE, + .read = mousedev_read, + .write = mousedev_write, + .poll = mousedev_poll, + .open = mousedev_open, + .release = mousedev_release, + .fasync = mousedev_fasync, + .llseek = noop_llseek, }; -static int mousedev_install_chrdev(struct mousedev *mousedev) -{ - mousedev_table[mousedev->minor] = mousedev; - return 0; -} - -static void mousedev_remove_chrdev(struct mousedev *mousedev) -{ - mutex_lock(&mousedev_table_mutex); - mousedev_table[mousedev->minor] = NULL; - mutex_unlock(&mousedev_table_mutex); -} - /* * Mark device non-existent. This disables writes, ioctls and * prevents new users from opening the device. Already posted @@ -842,24 +807,50 @@ static void mousedev_cleanup(struct mousedev *mousedev) mousedev_mark_dead(mousedev); mousedev_hangup(mousedev); - mousedev_remove_chrdev(mousedev); + + cdev_del(&mousedev->cdev); /* mousedev is marked dead so no one else accesses mousedev->open */ if (mousedev->open) input_close_device(handle); } +static int mousedev_reserve_minor(bool mixdev) +{ + int minor; + + if (mixdev) { + minor = input_get_new_minor(MOUSEDEV_MIX, 1, false); + if (minor < 0) + pr_err("failed to reserve mixdev minor: %d\n", minor); + } else { + minor = input_get_new_minor(MOUSEDEV_MINOR_BASE, + MOUSEDEV_MINORS, true); + if (minor < 0) + pr_err("failed to reserve new minor: %d\n", minor); + } + + return minor; +} + static struct mousedev *mousedev_create(struct input_dev *dev, struct input_handler *handler, - int minor) + bool mixdev) { struct mousedev *mousedev; + int minor; int error; + minor = mousedev_reserve_minor(mixdev); + if (minor < 0) { + error = minor; + goto err_out; + } + mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); if (!mousedev) { error = -ENOMEM; - goto err_out; + goto err_free_minor; } INIT_LIST_HEAD(&mousedev->client_list); @@ -867,16 +858,21 @@ static struct mousedev *mousedev_create(struct input_dev *dev, spin_lock_init(&mousedev->client_lock); mutex_init(&mousedev->mutex); lockdep_set_subclass(&mousedev->mutex, - minor == MOUSEDEV_MIX ? SINGLE_DEPTH_NESTING : 0); + mixdev ? SINGLE_DEPTH_NESTING : 0); init_waitqueue_head(&mousedev->wait); - if (minor == MOUSEDEV_MIX) + if (mixdev) { dev_set_name(&mousedev->dev, "mice"); - else - dev_set_name(&mousedev->dev, "mouse%d", minor); + } else { + int dev_no = minor; + /* Normalize device number if it falls into legacy range */ + if (dev_no < MOUSEDEV_MINOR_BASE + MOUSEDEV_MINORS) + dev_no -= MOUSEDEV_MINOR_BASE; + dev_set_name(&mousedev->dev, "mouse%d", dev_no); + } - mousedev->minor = minor; mousedev->exist = true; + mousedev->is_mixdev = mixdev; mousedev->handle.dev = input_get_device(dev); mousedev->handle.name = dev_name(&mousedev->dev); mousedev->handle.handler = handler; @@ -885,17 +881,18 @@ static struct mousedev *mousedev_create(struct input_dev *dev, mousedev->dev.class = &input_class; if (dev) mousedev->dev.parent = &dev->dev; - mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); + mousedev->dev.devt = MKDEV(INPUT_MAJOR, minor); mousedev->dev.release = mousedev_free; device_initialize(&mousedev->dev); - if (minor != MOUSEDEV_MIX) { + if (!mixdev) { error = input_register_handle(&mousedev->handle); if (error) goto err_free_mousedev; } - error = mousedev_install_chrdev(mousedev); + cdev_init(&mousedev->cdev, &mousedev_fops); + error = cdev_add(&mousedev->cdev, mousedev->dev.devt, 1); if (error) goto err_unregister_handle; @@ -908,10 +905,12 @@ static struct mousedev *mousedev_create(struct input_dev *dev, err_cleanup_mousedev: mousedev_cleanup(mousedev); err_unregister_handle: - if (minor != MOUSEDEV_MIX) + if (!mixdev) input_unregister_handle(&mousedev->handle); err_free_mousedev: put_device(&mousedev->dev); + err_free_minor: + input_free_minor(minor); err_out: return ERR_PTR(error); } @@ -920,7 +919,8 @@ static void mousedev_destroy(struct mousedev *mousedev) { device_del(&mousedev->dev); mousedev_cleanup(mousedev); - if (mousedev->minor != MOUSEDEV_MIX) + input_free_minor(MINOR(mousedev->dev.devt)); + if (!mousedev->is_mixdev) input_unregister_handle(&mousedev->handle); put_device(&mousedev->dev); } @@ -938,7 +938,7 @@ static int mixdev_add_device(struct mousedev *mousedev) if (retval) goto out; - mousedev->mixdev_open = 1; + mousedev->opened_by_mixdev = true; } get_device(&mousedev->dev); @@ -953,8 +953,8 @@ static void mixdev_remove_device(struct mousedev *mousedev) { mutex_lock(&mousedev_mix->mutex); - if (mousedev->mixdev_open) { - mousedev->mixdev_open = 0; + if (mousedev->opened_by_mixdev) { + mousedev->opened_by_mixdev = false; mousedev_close_device(mousedev); } @@ -969,19 +969,9 @@ static int mousedev_connect(struct input_handler *handler, const struct input_device_id *id) { struct mousedev *mousedev; - int minor; int error; - for (minor = 0; minor < MOUSEDEV_MINORS; minor++) - if (!mousedev_table[minor]) - break; - - if (minor == MOUSEDEV_MINORS) { - pr_err("no more free mousedev devices\n"); - return -ENFILE; - } - - mousedev = mousedev_create(dev, handler, minor); + mousedev = mousedev_create(dev, handler, false); if (IS_ERR(mousedev)) return PTR_ERR(mousedev); @@ -1054,27 +1044,53 @@ static const struct input_device_id mousedev_ids[] = { MODULE_DEVICE_TABLE(input, mousedev_ids); static struct input_handler mousedev_handler = { - .event = mousedev_event, - .connect = mousedev_connect, - .disconnect = mousedev_disconnect, - .fops = &mousedev_fops, - .minor = MOUSEDEV_MINOR_BASE, - .name = "mousedev", - .id_table = mousedev_ids, + .event = mousedev_event, + .connect = mousedev_connect, + .disconnect = mousedev_disconnect, + .legacy_minors = true, + .minor = MOUSEDEV_MINOR_BASE, + .name = "mousedev", + .id_table = mousedev_ids, }; #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX +#include <linux/miscdevice.h> + static struct miscdevice psaux_mouse = { - PSMOUSE_MINOR, "psaux", &mousedev_fops + .minor = PSMOUSE_MINOR, + .name = "psaux", + .fops = &mousedev_fops, }; -static int psaux_registered; + +static bool psaux_registered; + +static void __init mousedev_psaux_register(void) +{ + int error; + + error = misc_register(&psaux_mouse); + if (error) + pr_warn("could not register psaux device, error: %d\n", + error); + else + psaux_registered = true; +} + +static void __exit mousedev_psaux_unregister(void) +{ + if (psaux_registered) + misc_deregister(&psaux_mouse); +} +#else +static inline void mousedev_psaux_register(void) { } +static inline void mousedev_psaux_unregister(void) { } #endif static int __init mousedev_init(void) { int error; - mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); + mousedev_mix = mousedev_create(NULL, &mousedev_handler, true); if (IS_ERR(mousedev_mix)) return PTR_ERR(mousedev_mix); @@ -1084,14 +1100,7 @@ static int __init mousedev_init(void) return error; } -#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX - error = misc_register(&psaux_mouse); - if (error) - pr_warn("could not register psaux device, error: %d\n", - error); - else - psaux_registered = 1; -#endif + mousedev_psaux_register(); pr_info("PS/2 mouse device common for all mice\n"); @@ -1100,10 +1109,7 @@ static int __init mousedev_init(void) static void __exit mousedev_exit(void) { -#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX - if (psaux_registered) - misc_deregister(&psaux_mouse); -#endif + mousedev_psaux_unregister(); input_unregister_handler(&mousedev_handler); mousedev_destroy(mousedev_mix); } diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index 0d3219f29744..9edf9806cff9 100644 --- a/drivers/input/tablet/wacom_sys.c +++ b/drivers/input/tablet/wacom_sys.c @@ -172,6 +172,76 @@ static void wacom_close(struct input_dev *dev) } /* + * Calculate the resolution of the X or Y axis, given appropriate HID data. + * This function is little more than hidinput_calc_abs_res stripped down. + */ +static int wacom_calc_hid_res(int logical_extents, int physical_extents, + unsigned char unit, unsigned char exponent) +{ + int prev, unit_exponent; + + /* Check if the extents are sane */ + if (logical_extents <= 0 || physical_extents <= 0) + return 0; + + /* Get signed value of nybble-sized twos-compliment exponent */ + unit_exponent = exponent; + if (unit_exponent > 7) + unit_exponent -= 16; + + /* Convert physical_extents to millimeters */ + if (unit == 0x11) { /* If centimeters */ + unit_exponent += 1; + } else if (unit == 0x13) { /* If inches */ + prev = physical_extents; + physical_extents *= 254; + if (physical_extents < prev) + return 0; + unit_exponent -= 1; + } else { + return 0; + } + + /* Apply negative unit exponent */ + for (; unit_exponent < 0; unit_exponent++) { + prev = logical_extents; + logical_extents *= 10; + if (logical_extents < prev) + return 0; + } + /* Apply positive unit exponent */ + for (; unit_exponent > 0; unit_exponent--) { + prev = physical_extents; + physical_extents *= 10; + if (physical_extents < prev) + return 0; + } + + /* Calculate resolution */ + return logical_extents / physical_extents; +} + +/* + * The physical dimension specified by the HID descriptor is likely not in + * the "100th of a mm" units expected by wacom_calculate_touch_res. This + * function adjusts the value of [xy]_phy based on the unit and exponent + * provided by the HID descriptor. If an error occurs durring conversion + * (e.g. from the unit being left unspecified) [xy]_phy is not modified. + */ +static void wacom_fix_phy_from_hid(struct wacom_features *features) +{ + int xres = wacom_calc_hid_res(features->x_max, features->x_phy, + features->unit, features->unitExpo); + int yres = wacom_calc_hid_res(features->y_max, features->y_phy, + features->unit, features->unitExpo); + + if (xres > 0 && yres > 0) { + features->x_phy = (100 * features->x_max) / xres; + features->y_phy = (100 * features->y_max) / yres; + } +} + +/* * Static values for max X/Y and resolution of Pen interface is stored in * features. This mean physical size of active area can be computed. * This is useful to do when Pen and Touch have same active area of tablet. @@ -432,56 +502,52 @@ static int wacom_parse_hid(struct usb_interface *intf, return result; } -static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features) +static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode) { unsigned char *rep_data; - int limit = 0, report_id = 2; - int error = -ENOMEM; + int error = -ENOMEM, limit = 0; - rep_data = kmalloc(4, GFP_KERNEL); + rep_data = kzalloc(length, GFP_KERNEL); if (!rep_data) return error; - /* ask to report Wacom data */ + rep_data[0] = report_id; + rep_data[1] = mode; + + do { + error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, + report_id, rep_data, length, 1); + if (error >= 0) + error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT, + report_id, rep_data, length, 1); + } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES); + + kfree(rep_data); + + return error < 0 ? error : 0; +} + +/* + * Switch the tablet into its most-capable mode. Wacom tablets are + * typically configured to power-up in a mode which sends mouse-like + * reports to the OS. To get absolute position, pressure data, etc. + * from the tablet, it is necessary to switch the tablet out of this + * mode and into one which sends the full range of tablet data. + */ +static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features) +{ if (features->device_type == BTN_TOOL_FINGER) { - /* if it is an MT Tablet PC touch */ if (features->type > TABLETPC) { - do { - rep_data[0] = 3; - rep_data[1] = 4; - rep_data[2] = 0; - rep_data[3] = 0; - report_id = 3; - error = wacom_set_report(intf, - WAC_HID_FEATURE_REPORT, - report_id, - rep_data, 4, 1); - if (error >= 0) - error = wacom_get_report(intf, - WAC_HID_FEATURE_REPORT, - report_id, - rep_data, 4, 1); - } while ((error < 0 || rep_data[1] != 4) && - limit++ < WAC_MSG_RETRIES); + /* MT Tablet PC touch */ + return wacom_set_device_mode(intf, 3, 4, 4); + } + } else if (features->device_type == BTN_TOOL_PEN) { + if (features->type <= BAMBOO_PT && features->type != WIRELESS) { + return wacom_set_device_mode(intf, 2, 2, 2); } - } else if (features->type <= BAMBOO_PT && - features->type != WIRELESS && - features->device_type == BTN_TOOL_PEN) { - do { - rep_data[0] = 2; - rep_data[1] = 2; - error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, - report_id, rep_data, 2, 1); - if (error >= 0) - error = wacom_get_report(intf, - WAC_HID_FEATURE_REPORT, - report_id, rep_data, 2, 1); - } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES); } - kfree(rep_data); - - return error < 0 ? error : 0; + return 0; } static int wacom_retrieve_hid_descriptor(struct usb_interface *intf, @@ -531,6 +597,7 @@ static int wacom_retrieve_hid_descriptor(struct usb_interface *intf, error = wacom_parse_hid(intf, hid_desc, features); if (error) goto out; + wacom_fix_phy_from_hid(features); out: return error; diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c index 08b462b6c0d8..c3468c8dbd89 100644 --- a/drivers/input/tablet/wacom_wac.c +++ b/drivers/input/tablet/wacom_wac.c @@ -25,6 +25,11 @@ #define WACOM_INTUOS_RES 100 #define WACOM_INTUOS3_RES 200 +/* Scale factor relating reported contact size to logical contact area. + * 2^14/pi is a good approximation on Intuos5 and 3rd-gen Bamboo + */ +#define WACOM_CONTACT_AREA_SCALE 2607 + static int wacom_penpartner_irq(struct wacom_wac *wacom) { unsigned char *data = wacom->data; @@ -326,7 +331,7 @@ static int wacom_intuos_inout(struct wacom_wac *wacom) /* Enter report */ if ((data[1] & 0xfc) == 0xc0) { - if (features->type >= INTUOS5S && features->type <= INTUOS5L) + if (features->quirks == WACOM_QUIRK_MULTI_INPUT) wacom->shared->stylus_in_proximity = true; /* serial number of the tool */ @@ -414,7 +419,7 @@ static int wacom_intuos_inout(struct wacom_wac *wacom) /* Exit report */ if ((data[1] & 0xfe) == 0x80) { - if (features->type >= INTUOS5S && features->type <= INTUOS5L) + if (features->quirks == WACOM_QUIRK_MULTI_INPUT) wacom->shared->stylus_in_proximity = false; /* @@ -1043,11 +1048,19 @@ static void wacom_bpt3_touch_msg(struct wacom_wac *wacom, unsigned char *data) if (touch) { int x = (data[2] << 4) | (data[4] >> 4); int y = (data[3] << 4) | (data[4] & 0x0f); - int w = data[6]; + int a = data[5]; + + // "a" is a scaled-down area which we assume is roughly + // circular and which can be described as: a=(pi*r^2)/C. + int x_res = input_abs_get_res(input, ABS_X); + int y_res = input_abs_get_res(input, ABS_Y); + int width = 2 * int_sqrt(a * WACOM_CONTACT_AREA_SCALE); + int height = width * y_res / x_res; input_report_abs(input, ABS_MT_POSITION_X, x); input_report_abs(input, ABS_MT_POSITION_Y, y); - input_report_abs(input, ABS_MT_TOUCH_MAJOR, w); + input_report_abs(input, ABS_MT_TOUCH_MAJOR, width); + input_report_abs(input, ABS_MT_TOUCH_MINOR, height); } } @@ -1533,7 +1546,9 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev, input_mt_init_slots(input_dev, features->touch_max, 0); input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, - 0, 255, 0, 0); + 0, features->x_max, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, + 0, features->y_max, 0, 0); input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, features->x_max, @@ -1641,7 +1656,10 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev, input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, - 0, 255, 0, 0); + 0, features->x_max, 0, 0); + input_set_abs_params(input_dev, + ABS_MT_TOUCH_MINOR, + 0, features->y_max, 0, 0); } input_set_abs_params(input_dev, ABS_MT_POSITION_X, diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index e92615d0b1b0..1df2396af008 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -320,10 +320,8 @@ static bool mxt_object_writable(unsigned int type) static void mxt_dump_message(struct device *dev, struct mxt_message *message) { - dev_dbg(dev, "reportid: %u\tmessage: %02x %02x %02x %02x %02x %02x %02x\n", - message->reportid, message->message[0], message->message[1], - message->message[2], message->message[3], message->message[4], - message->message[5], message->message[6]); + dev_dbg(dev, "reportid: %u\tmessage: %*ph\n", + message->reportid, 7, message->message); } static int mxt_check_bootloader(struct i2c_client *client, diff --git a/include/linux/input.h b/include/linux/input.h index ba4874302939..15464ba6bf53 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -1396,8 +1396,8 @@ struct input_handle; * @start: starts handler for given handle. This function is called by * input core right after connect() method and also when a process * that "grabbed" a device releases it - * @fops: file operations this driver implements - * @minor: beginning of range of 32 minors for devices this driver + * @legacy_minors: set to %true by drivers using legacy minor ranges + * @minor: beginning of range of 32 legacy minors for devices this driver * can provide * @name: name of the handler, to be shown in /proc/bus/input/handlers * @id_table: pointer to a table of input_device_ids this driver can @@ -1431,7 +1431,7 @@ struct input_handler { void (*disconnect)(struct input_handle *handle); void (*start)(struct input_handle *handle); - const struct file_operations *fops; + bool legacy_minors; int minor; const char *name; @@ -1499,6 +1499,10 @@ void input_reset_device(struct input_dev *); int __must_check input_register_handler(struct input_handler *); void input_unregister_handler(struct input_handler *); +int __must_check input_get_new_minor(int legacy_base, unsigned int legacy_num, + bool allow_dynamic); +void input_free_minor(unsigned int minor); + int input_handler_for_each_handle(struct input_handler *, void *data, int (*fn)(struct input_handle *, void *)); |