diff options
Diffstat (limited to 'drivers/staging/unisys/visorinput/visorinput.c')
| -rw-r--r-- | drivers/staging/unisys/visorinput/visorinput.c | 787 |
1 files changed, 0 insertions, 787 deletions
diff --git a/drivers/staging/unisys/visorinput/visorinput.c b/drivers/staging/unisys/visorinput/visorinput.c deleted file mode 100644 index 426deab22d62..000000000000 --- a/drivers/staging/unisys/visorinput/visorinput.c +++ /dev/null @@ -1,787 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2011 - 2015 UNISYS CORPORATION - * All rights reserved. - */ - -/* - * This driver lives in a generic guest Linux partition, and registers to - * receive keyboard and mouse channels from the visorbus driver. It reads - * inputs from such channels, and delivers it to the Linux OS in the - * standard way the Linux expects for input drivers. - */ - -#include <linux/fb.h> -#include <linux/input.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/uuid.h> -#include <linux/visorbus.h> - -/* These defines identify mouse and keyboard activity which is specified by the - * firmware to the host using the cmsimpleinput protocol. @ingroup coretypes - */ -/* only motion; arg1=x, arg2=y */ -#define INPUTACTION_XY_MOTION 1 - -/* arg1: 1=left,2=center,3=right */ -#define INPUTACTION_MOUSE_BUTTON_DOWN 2 -#define INPUTACTION_MOUSE_BUTTON_UP 3 -#define INPUTACTION_MOUSE_BUTTON_CLICK 4 -#define INPUTACTION_MOUSE_BUTTON_DCLICK 5 - -/* arg1: wheel rotation away from/toward user */ -#define INPUTACTION_WHEEL_ROTATE_AWAY 6 -#define INPUTACTION_WHEEL_ROTATE_TOWARD 7 - -/* arg1: scancode, as follows: If arg1 <= 0xff, it's a 1-byte scancode and arg1 - * is that scancode. If arg1 > 0xff, it's a 2-byte scanecode, with the 1st - * byte in the low 8 bits, and the 2nd byte in the high 8 bits. - * E.g., the right ALT key would appear as x'38e0'. - */ -#define INPUTACTION_KEY_DOWN 64 -#define INPUTACTION_KEY_UP 65 -#define INPUTACTION_KEY_DOWN_UP 67 - -/* arg1: scancode (in same format as inputaction_keyDown); MUST refer to one of - * the locking keys, like capslock, numlock, or scrolllock. - * arg2: 1 iff locking key should be in the LOCKED position (e.g., light is ON) - */ -#define INPUTACTION_SET_LOCKING_KEY_STATE 66 - -/* Keyboard channel {c73416d0-b0b8-44af-b304-9d2ae99f1b3d} */ -#define VISOR_KEYBOARD_CHANNEL_GUID \ - GUID_INIT(0xc73416d0, 0xb0b8, 0x44af, \ - 0xb3, 0x4, 0x9d, 0x2a, 0xe9, 0x9f, 0x1b, 0x3d) -#define VISOR_KEYBOARD_CHANNEL_GUID_STR "c73416d0-b0b8-44af-b304-9d2ae99f1b3d" - -/* Mouse channel {addf07d4-94a9-46e2-81c3-61abcdbdbd87} */ -#define VISOR_MOUSE_CHANNEL_GUID \ - GUID_INIT(0xaddf07d4, 0x94a9, 0x46e2, \ - 0x81, 0xc3, 0x61, 0xab, 0xcd, 0xbd, 0xbd, 0x87) -#define VISOR_MOUSE_CHANNEL_GUID_STR "addf07d4-94a9-46e2-81c3-61abcdbdbd87" - -#define PIXELS_ACROSS_DEFAULT 1024 -#define PIXELS_DOWN_DEFAULT 768 -#define KEYCODE_TABLE_BYTES 256 - -struct visor_inputactivity { - u16 action; - u16 arg1; - u16 arg2; - u16 arg3; -} __packed; - -struct visor_inputreport { - u64 seq_no; - struct visor_inputactivity activity; -} __packed; - -/* header of keyboard/mouse channels */ -struct visor_input_channel_data { - u32 n_input_reports; - union { - struct { - u16 x_res; - u16 y_res; - } mouse; - struct { - u32 flags; - } keyboard; - }; -} __packed; - -enum visorinput_dev_type { - visorinput_keyboard, - visorinput_mouse, -}; - -/* - * This is the private data that we store for each device. A pointer to this - * struct is maintained via dev_get_drvdata() / dev_set_drvdata() for each - * struct device. - */ -struct visorinput_devdata { - struct visor_device *dev; - /* lock for dev */ - struct mutex lock_visor_dev; - struct input_dev *visorinput_dev; - bool paused; - bool interrupts_enabled; - /* size of following array */ - unsigned int keycode_table_bytes; - /* for keyboard devices: visorkbd_keycode[] + visorkbd_ext_keycode[] */ - unsigned char keycode_table[]; -}; - -static const guid_t visor_keyboard_channel_guid = VISOR_KEYBOARD_CHANNEL_GUID; -static const guid_t visor_mouse_channel_guid = VISOR_MOUSE_CHANNEL_GUID; - -/* - * Borrowed from drivers/input/keyboard/atakbd.c - * This maps 1-byte scancodes to keycodes. - */ -static const unsigned char visorkbd_keycode[KEYCODE_TABLE_BYTES] = { - /* American layout */ - [0] = KEY_GRAVE, - [1] = KEY_ESC, - [2] = KEY_1, - [3] = KEY_2, - [4] = KEY_3, - [5] = KEY_4, - [6] = KEY_5, - [7] = KEY_6, - [8] = KEY_7, - [9] = KEY_8, - [10] = KEY_9, - [11] = KEY_0, - [12] = KEY_MINUS, - [13] = KEY_EQUAL, - [14] = KEY_BACKSPACE, - [15] = KEY_TAB, - [16] = KEY_Q, - [17] = KEY_W, - [18] = KEY_E, - [19] = KEY_R, - [20] = KEY_T, - [21] = KEY_Y, - [22] = KEY_U, - [23] = KEY_I, - [24] = KEY_O, - [25] = KEY_P, - [26] = KEY_LEFTBRACE, - [27] = KEY_RIGHTBRACE, - [28] = KEY_ENTER, - [29] = KEY_LEFTCTRL, - [30] = KEY_A, - [31] = KEY_S, - [32] = KEY_D, - [33] = KEY_F, - [34] = KEY_G, - [35] = KEY_H, - [36] = KEY_J, - [37] = KEY_K, - [38] = KEY_L, - [39] = KEY_SEMICOLON, - [40] = KEY_APOSTROPHE, - [41] = KEY_GRAVE, - [42] = KEY_LEFTSHIFT, - [43] = KEY_BACKSLASH, - [44] = KEY_Z, - [45] = KEY_X, - [46] = KEY_C, - [47] = KEY_V, - [48] = KEY_B, - [49] = KEY_N, - [50] = KEY_M, - [51] = KEY_COMMA, - [52] = KEY_DOT, - [53] = KEY_SLASH, - [54] = KEY_RIGHTSHIFT, - [55] = KEY_KPASTERISK, - [56] = KEY_LEFTALT, - [57] = KEY_SPACE, - [58] = KEY_CAPSLOCK, - [59] = KEY_F1, - [60] = KEY_F2, - [61] = KEY_F3, - [62] = KEY_F4, - [63] = KEY_F5, - [64] = KEY_F6, - [65] = KEY_F7, - [66] = KEY_F8, - [67] = KEY_F9, - [68] = KEY_F10, - [69] = KEY_NUMLOCK, - [70] = KEY_SCROLLLOCK, - [71] = KEY_KP7, - [72] = KEY_KP8, - [73] = KEY_KP9, - [74] = KEY_KPMINUS, - [75] = KEY_KP4, - [76] = KEY_KP5, - [77] = KEY_KP6, - [78] = KEY_KPPLUS, - [79] = KEY_KP1, - [80] = KEY_KP2, - [81] = KEY_KP3, - [82] = KEY_KP0, - [83] = KEY_KPDOT, - /* enables UK backslash+pipe key and FR lessthan+greaterthan key */ - [86] = KEY_102ND, - [87] = KEY_F11, - [88] = KEY_F12, - [90] = KEY_KPLEFTPAREN, - [91] = KEY_KPRIGHTPAREN, - [92] = KEY_KPASTERISK, - [93] = KEY_KPASTERISK, - [94] = KEY_KPPLUS, - [95] = KEY_HELP, - [96] = KEY_KPENTER, - [97] = KEY_RIGHTCTRL, - [98] = KEY_KPSLASH, - [99] = KEY_KPLEFTPAREN, - [100] = KEY_KPRIGHTPAREN, - [101] = KEY_KPSLASH, - [102] = KEY_HOME, - [103] = KEY_UP, - [104] = KEY_PAGEUP, - [105] = KEY_LEFT, - [106] = KEY_RIGHT, - [107] = KEY_END, - [108] = KEY_DOWN, - [109] = KEY_PAGEDOWN, - [110] = KEY_INSERT, - [111] = KEY_DELETE, - [112] = KEY_MACRO, - [113] = KEY_MUTE -}; - -/* - * This maps the <xx> in extended scancodes of the form "0xE0 <xx>" into - * keycodes. - */ -static const unsigned char visorkbd_ext_keycode[KEYCODE_TABLE_BYTES] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */ - 0, 0, 0, 0, KEY_KPENTER, KEY_RIGHTCTRL, 0, 0, /* 0x18 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */ - KEY_RIGHTALT, 0, 0, 0, 0, 0, 0, 0, /* 0x28 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 */ - KEY_RIGHTALT /* AltGr */, 0, 0, 0, 0, 0, 0, 0, /* 0x38 */ - 0, 0, 0, 0, 0, 0, 0, KEY_HOME, /* 0x40 */ - KEY_UP, KEY_PAGEUP, 0, KEY_LEFT, 0, KEY_RIGHT, 0, KEY_END, /* 0x48 */ - KEY_DOWN, KEY_PAGEDOWN, KEY_INSERT, KEY_DELETE, 0, 0, 0, 0, /* 0x50 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x58 */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */ -}; - -static int visorinput_open(struct input_dev *visorinput_dev) -{ - struct visorinput_devdata *devdata = input_get_drvdata(visorinput_dev); - - if (!devdata) { - dev_err(&visorinput_dev->dev, - "%s input_get_drvdata(%p) returned NULL\n", - __func__, visorinput_dev); - return -EINVAL; - } - dev_dbg(&visorinput_dev->dev, "%s opened\n", __func__); - - /* - * If we're not paused, really enable interrupts. Regardless of whether - * we are paused, set a flag indicating interrupts should be enabled so - * when we resume, interrupts will really be enabled. - */ - mutex_lock(&devdata->lock_visor_dev); - devdata->interrupts_enabled = true; - if (devdata->paused) - goto out_unlock; - visorbus_enable_channel_interrupts(devdata->dev); - -out_unlock: - mutex_unlock(&devdata->lock_visor_dev); - return 0; -} - -static void visorinput_close(struct input_dev *visorinput_dev) -{ - struct visorinput_devdata *devdata = input_get_drvdata(visorinput_dev); - - if (!devdata) { - dev_err(&visorinput_dev->dev, - "%s input_get_drvdata(%p) returned NULL\n", - __func__, visorinput_dev); - return; - } - dev_dbg(&visorinput_dev->dev, "%s closed\n", __func__); - - /* - * If we're not paused, really disable interrupts. Regardless of - * whether we are paused, set a flag indicating interrupts should be - * disabled so when we resume we will not re-enable them. - */ - mutex_lock(&devdata->lock_visor_dev); - devdata->interrupts_enabled = false; - if (devdata->paused) - goto out_unlock; - visorbus_disable_channel_interrupts(devdata->dev); - -out_unlock: - mutex_unlock(&devdata->lock_visor_dev); -} - -/* - * setup_client_keyboard() initializes and returns a Linux input node that we - * can use to deliver keyboard inputs to Linux. We of course do this when we - * see keyboard inputs coming in on a keyboard channel. - */ -static struct input_dev *setup_client_keyboard(void *devdata, - unsigned char *keycode_table) - -{ - int i; - struct input_dev *visorinput_dev = input_allocate_device(); - - if (!visorinput_dev) - return NULL; - - visorinput_dev->name = "visor Keyboard"; - visorinput_dev->phys = "visorkbd:input0"; - visorinput_dev->id.bustype = BUS_VIRTUAL; - visorinput_dev->id.vendor = 0x0001; - visorinput_dev->id.product = 0x0001; - visorinput_dev->id.version = 0x0100; - - visorinput_dev->evbit[0] = BIT_MASK(EV_KEY) | - BIT_MASK(EV_REP) | - BIT_MASK(EV_LED); - visorinput_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | - BIT_MASK(LED_SCROLLL) | - BIT_MASK(LED_NUML); - visorinput_dev->keycode = keycode_table; - /* sizeof(unsigned char) */ - visorinput_dev->keycodesize = 1; - visorinput_dev->keycodemax = KEYCODE_TABLE_BYTES; - - for (i = 1; i < visorinput_dev->keycodemax; i++) - set_bit(keycode_table[i], visorinput_dev->keybit); - for (i = 1; i < visorinput_dev->keycodemax; i++) - set_bit(keycode_table[i + KEYCODE_TABLE_BYTES], - visorinput_dev->keybit); - - visorinput_dev->open = visorinput_open; - visorinput_dev->close = visorinput_close; - /* pre input_register! */ - input_set_drvdata(visorinput_dev, devdata); - - return visorinput_dev; -} - -static struct input_dev *setup_client_mouse(void *devdata, unsigned int xres, - unsigned int yres) -{ - struct input_dev *visorinput_dev = input_allocate_device(); - - if (!visorinput_dev) - return NULL; - - visorinput_dev->name = "visor Mouse"; - visorinput_dev->phys = "visormou:input0"; - visorinput_dev->id.bustype = BUS_VIRTUAL; - visorinput_dev->id.vendor = 0x0001; - visorinput_dev->id.product = 0x0002; - visorinput_dev->id.version = 0x0100; - - visorinput_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); - set_bit(BTN_LEFT, visorinput_dev->keybit); - set_bit(BTN_RIGHT, visorinput_dev->keybit); - set_bit(BTN_MIDDLE, visorinput_dev->keybit); - - if (xres == 0) - xres = PIXELS_ACROSS_DEFAULT; - if (yres == 0) - yres = PIXELS_DOWN_DEFAULT; - input_set_abs_params(visorinput_dev, ABS_X, 0, xres, 0, 0); - input_set_abs_params(visorinput_dev, ABS_Y, 0, yres, 0, 0); - - visorinput_dev->open = visorinput_open; - visorinput_dev->close = visorinput_close; - /* pre input_register! */ - input_set_drvdata(visorinput_dev, devdata); - input_set_capability(visorinput_dev, EV_REL, REL_WHEEL); - - return visorinput_dev; -} - -static struct visorinput_devdata *devdata_create(struct visor_device *dev, - enum visorinput_dev_type dtype) -{ - struct visorinput_devdata *devdata = NULL; - unsigned int extra_bytes = 0; - unsigned int size, xres, yres, err; - struct visor_input_channel_data data; - - if (dtype == visorinput_keyboard) - /* allocate room for devdata->keycode_table, filled in below */ - extra_bytes = KEYCODE_TABLE_BYTES * 2; - devdata = kzalloc(sizeof(*devdata) + extra_bytes, GFP_KERNEL); - if (!devdata) - return NULL; - mutex_init(&devdata->lock_visor_dev); - mutex_lock(&devdata->lock_visor_dev); - devdata->dev = dev; - - /* - * visorinput_open() can be called as soon as input_register_device() - * happens, and that will enable channel interrupts. Setting paused - * prevents us from getting into visorinput_channel_interrupt() prior - * to the device structure being totally initialized. - */ - devdata->paused = true; - - /* - * This is an input device in a client guest partition, so we need to - * create whatever input nodes are necessary to deliver our inputs to - * the guest OS. - */ - switch (dtype) { - case visorinput_keyboard: - devdata->keycode_table_bytes = extra_bytes; - memcpy(devdata->keycode_table, visorkbd_keycode, - KEYCODE_TABLE_BYTES); - memcpy(devdata->keycode_table + KEYCODE_TABLE_BYTES, - visorkbd_ext_keycode, KEYCODE_TABLE_BYTES); - devdata->visorinput_dev = setup_client_keyboard - (devdata, devdata->keycode_table); - if (!devdata->visorinput_dev) - goto cleanups_register; - break; - case visorinput_mouse: - size = sizeof(struct visor_input_channel_data); - err = visorbus_read_channel(dev, sizeof(struct channel_header), - &data, size); - if (err) - goto cleanups_register; - xres = data.mouse.x_res; - yres = data.mouse.y_res; - devdata->visorinput_dev = setup_client_mouse(devdata, xres, - yres); - if (!devdata->visorinput_dev) - goto cleanups_register; - break; - default: - /* No other input devices supported */ - break; - } - - dev_set_drvdata(&dev->device, devdata); - mutex_unlock(&devdata->lock_visor_dev); - - /* - * Device struct is completely set up now, with the exception of - * visorinput_dev being registered. We need to unlock before we - * register the device, because this can cause an on-stack call of - * visorinput_open(), which would deadlock if we had the lock. - */ - if (input_register_device(devdata->visorinput_dev)) { - input_free_device(devdata->visorinput_dev); - goto err_kfree_devdata; - } - - mutex_lock(&devdata->lock_visor_dev); - /* - * Establish calls to visorinput_channel_interrupt() if that is the - * desired state that we've kept track of in interrupts_enabled while - * the device was being created. - */ - devdata->paused = false; - if (devdata->interrupts_enabled) - visorbus_enable_channel_interrupts(dev); - mutex_unlock(&devdata->lock_visor_dev); - - return devdata; - -cleanups_register: - mutex_unlock(&devdata->lock_visor_dev); -err_kfree_devdata: - kfree(devdata); - return NULL; -} - -static int visorinput_probe(struct visor_device *dev) -{ - const guid_t *guid; - enum visorinput_dev_type dtype; - - guid = visorchannel_get_guid(dev->visorchannel); - if (guid_equal(guid, &visor_mouse_channel_guid)) - dtype = visorinput_mouse; - else if (guid_equal(guid, &visor_keyboard_channel_guid)) - dtype = visorinput_keyboard; - else - return -ENODEV; - visorbus_disable_channel_interrupts(dev); - if (!devdata_create(dev, dtype)) - return -ENOMEM; - return 0; -} - -static void unregister_client_input(struct input_dev *visorinput_dev) -{ - if (visorinput_dev) - input_unregister_device(visorinput_dev); -} - -static void visorinput_remove(struct visor_device *dev) -{ - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) - return; - - mutex_lock(&devdata->lock_visor_dev); - visorbus_disable_channel_interrupts(dev); - - /* - * due to above, at this time no thread of execution will be in - * visorinput_channel_interrupt() - */ - - dev_set_drvdata(&dev->device, NULL); - mutex_unlock(&devdata->lock_visor_dev); - - unregister_client_input(devdata->visorinput_dev); - kfree(devdata); -} - -/* - * Make it so the current locking state of the locking key indicated by - * <keycode> is as indicated by <desired_state> (1=locked, 0=unlocked). - */ -static void handle_locking_key(struct input_dev *visorinput_dev, int keycode, - int desired_state) -{ - int led; - - switch (keycode) { - case KEY_CAPSLOCK: - led = LED_CAPSL; - break; - case KEY_SCROLLLOCK: - led = LED_SCROLLL; - break; - case KEY_NUMLOCK: - led = LED_NUML; - break; - default: - return; - } - if (test_bit(led, visorinput_dev->led) != desired_state) { - input_report_key(visorinput_dev, keycode, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, keycode, 0); - input_sync(visorinput_dev); - __change_bit(led, visorinput_dev->led); - } -} - -/* - * <scancode> is either a 1-byte scancode, or an extended 16-bit scancode with - * 0xE0 in the low byte and the extended scancode value in the next higher byte. - */ -static int scancode_to_keycode(int scancode) -{ - if (scancode > 0xff) - return visorkbd_ext_keycode[(scancode >> 8) & 0xff]; - - return visorkbd_keycode[scancode]; -} - -static int calc_button(int x) -{ - switch (x) { - case 1: - return BTN_LEFT; - case 2: - return BTN_MIDDLE; - case 3: - return BTN_RIGHT; - default: - return -EINVAL; - } -} - -/* - * This is used only when this driver is active as an input driver in the - * client guest partition. It is called periodically so we can obtain inputs - * from the channel, and deliver them to the guest OS. - */ -static void visorinput_channel_interrupt(struct visor_device *dev) -{ - struct visor_inputreport r; - int scancode, keycode; - struct input_dev *visorinput_dev; - int xmotion, ymotion, button; - int i; - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) - return; - - visorinput_dev = devdata->visorinput_dev; - - while (!visorchannel_signalremove(dev->visorchannel, 0, &r)) { - scancode = r.activity.arg1; - keycode = scancode_to_keycode(scancode); - switch (r.activity.action) { - case INPUTACTION_KEY_DOWN: - input_report_key(visorinput_dev, keycode, 1); - input_sync(visorinput_dev); - break; - case INPUTACTION_KEY_UP: - input_report_key(visorinput_dev, keycode, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_KEY_DOWN_UP: - input_report_key(visorinput_dev, keycode, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, keycode, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_SET_LOCKING_KEY_STATE: - handle_locking_key(visorinput_dev, keycode, - r.activity.arg2); - break; - case INPUTACTION_XY_MOTION: - xmotion = r.activity.arg1; - ymotion = r.activity.arg2; - input_report_abs(visorinput_dev, ABS_X, xmotion); - input_report_abs(visorinput_dev, ABS_Y, ymotion); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_DOWN: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - input_report_key(visorinput_dev, button, 1); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_UP: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - input_report_key(visorinput_dev, button, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_CLICK: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - input_report_key(visorinput_dev, button, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, button, 0); - input_sync(visorinput_dev); - break; - case INPUTACTION_MOUSE_BUTTON_DCLICK: - button = calc_button(r.activity.arg1); - if (button < 0) - break; - for (i = 0; i < 2; i++) { - input_report_key(visorinput_dev, button, 1); - input_sync(visorinput_dev); - input_report_key(visorinput_dev, button, 0); - input_sync(visorinput_dev); - } - break; - case INPUTACTION_WHEEL_ROTATE_AWAY: - input_report_rel(visorinput_dev, REL_WHEEL, 1); - input_sync(visorinput_dev); - break; - case INPUTACTION_WHEEL_ROTATE_TOWARD: - input_report_rel(visorinput_dev, REL_WHEEL, -1); - input_sync(visorinput_dev); - break; - default: - /* Unsupported input action */ - break; - } - } -} - -static int visorinput_pause(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - int rc; - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) { - rc = -ENODEV; - goto out; - } - - mutex_lock(&devdata->lock_visor_dev); - if (devdata->paused) { - rc = -EBUSY; - goto out_locked; - } - if (devdata->interrupts_enabled) - visorbus_disable_channel_interrupts(dev); - - /* - * due to above, at this time no thread of execution will be in - * visorinput_channel_interrupt() - */ - devdata->paused = true; - complete_func(dev, 0); - rc = 0; -out_locked: - mutex_unlock(&devdata->lock_visor_dev); -out: - return rc; -} - -static int visorinput_resume(struct visor_device *dev, - visorbus_state_complete_func complete_func) -{ - int rc; - struct visorinput_devdata *devdata = dev_get_drvdata(&dev->device); - - if (!devdata) { - rc = -ENODEV; - goto out; - } - mutex_lock(&devdata->lock_visor_dev); - if (!devdata->paused) { - rc = -EBUSY; - goto out_locked; - } - devdata->paused = false; - complete_func(dev, 0); - - /* - * Re-establish calls to visorinput_channel_interrupt() if that is the - * desired state that we've kept track of in interrupts_enabled while - * the device was paused. - */ - if (devdata->interrupts_enabled) - visorbus_enable_channel_interrupts(dev); - - rc = 0; -out_locked: - mutex_unlock(&devdata->lock_visor_dev); -out: - return rc; -} - -/* GUIDS for all channel types supported by this driver. */ -static struct visor_channeltype_descriptor visorinput_channel_types[] = { - { VISOR_KEYBOARD_CHANNEL_GUID, "keyboard", - sizeof(struct channel_header), 0 }, - { VISOR_MOUSE_CHANNEL_GUID, "mouse", sizeof(struct channel_header), 0 }, - {} -}; - -static struct visor_driver visorinput_driver = { - .name = "visorinput", - .owner = THIS_MODULE, - .channel_types = visorinput_channel_types, - .probe = visorinput_probe, - .remove = visorinput_remove, - .channel_interrupt = visorinput_channel_interrupt, - .pause = visorinput_pause, - .resume = visorinput_resume, -}; - -module_driver(visorinput_driver, visorbus_register_visor_driver, - visorbus_unregister_visor_driver); - -MODULE_DEVICE_TABLE(visorbus, visorinput_channel_types); - -MODULE_AUTHOR("Unisys"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("s-Par human input driver for virtual keyboard/mouse"); - -MODULE_ALIAS("visorbus:" VISOR_MOUSE_CHANNEL_GUID_STR); -MODULE_ALIAS("visorbus:" VISOR_KEYBOARD_CHANNEL_GUID_STR); |