1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * IBM ASM Service Processor Device Driver
4  *
5  * Copyright (C) IBM Corporation, 2004
6  *
7  * Authors: Max Asböck <amax@us.ibm.com>
8  *          Vernon Mauery <vernux@us.ibm.com>
9  */
10 
11 /* Remote mouse and keyboard event handling functions */
12 
13 #include <linux/pci.h>
14 #include "ibmasm.h"
15 #include "remote.h"
16 
17 #define MOUSE_X_MAX	1600
18 #define MOUSE_Y_MAX	1200
19 
20 static const unsigned short xlate_high[XLATE_SIZE] = {
21 	[KEY_SYM_ENTER & 0xff] = KEY_ENTER,
22 	[KEY_SYM_KPSLASH & 0xff] = KEY_KPSLASH,
23 	[KEY_SYM_KPSTAR & 0xff] = KEY_KPASTERISK,
24 	[KEY_SYM_KPMINUS & 0xff] = KEY_KPMINUS,
25 	[KEY_SYM_KPDOT & 0xff] = KEY_KPDOT,
26 	[KEY_SYM_KPPLUS & 0xff] = KEY_KPPLUS,
27 	[KEY_SYM_KP0 & 0xff] = KEY_KP0,
28 	[KEY_SYM_KP1 & 0xff] = KEY_KP1,
29 	[KEY_SYM_KP2 & 0xff] = KEY_KP2, [KEY_SYM_KPDOWN & 0xff] = KEY_KP2,
30 	[KEY_SYM_KP3 & 0xff] = KEY_KP3,
31 	[KEY_SYM_KP4 & 0xff] = KEY_KP4, [KEY_SYM_KPLEFT & 0xff] = KEY_KP4,
32 	[KEY_SYM_KP5 & 0xff] = KEY_KP5,
33 	[KEY_SYM_KP6 & 0xff] = KEY_KP6, [KEY_SYM_KPRIGHT & 0xff] = KEY_KP6,
34 	[KEY_SYM_KP7 & 0xff] = KEY_KP7,
35 	[KEY_SYM_KP8 & 0xff] = KEY_KP8, [KEY_SYM_KPUP & 0xff] = KEY_KP8,
36 	[KEY_SYM_KP9 & 0xff] = KEY_KP9,
37 	[KEY_SYM_BK_SPC & 0xff] = KEY_BACKSPACE,
38 	[KEY_SYM_TAB & 0xff] = KEY_TAB,
39 	[KEY_SYM_CTRL & 0xff] = KEY_LEFTCTRL,
40 	[KEY_SYM_ALT & 0xff] = KEY_LEFTALT,
41 	[KEY_SYM_INSERT & 0xff] = KEY_INSERT,
42 	[KEY_SYM_DELETE & 0xff] = KEY_DELETE,
43 	[KEY_SYM_SHIFT & 0xff] = KEY_LEFTSHIFT,
44 	[KEY_SYM_UARROW & 0xff] = KEY_UP,
45 	[KEY_SYM_DARROW & 0xff] = KEY_DOWN,
46 	[KEY_SYM_LARROW & 0xff] = KEY_LEFT,
47 	[KEY_SYM_RARROW & 0xff] = KEY_RIGHT,
48 	[KEY_SYM_ESCAPE & 0xff] = KEY_ESC,
49         [KEY_SYM_PAGEUP & 0xff] = KEY_PAGEUP,
50         [KEY_SYM_PAGEDOWN & 0xff] = KEY_PAGEDOWN,
51         [KEY_SYM_HOME & 0xff] = KEY_HOME,
52         [KEY_SYM_END & 0xff] = KEY_END,
53 	[KEY_SYM_F1 & 0xff] = KEY_F1,
54 	[KEY_SYM_F2 & 0xff] = KEY_F2,
55 	[KEY_SYM_F3 & 0xff] = KEY_F3,
56 	[KEY_SYM_F4 & 0xff] = KEY_F4,
57 	[KEY_SYM_F5 & 0xff] = KEY_F5,
58 	[KEY_SYM_F6 & 0xff] = KEY_F6,
59 	[KEY_SYM_F7 & 0xff] = KEY_F7,
60 	[KEY_SYM_F8 & 0xff] = KEY_F8,
61 	[KEY_SYM_F9 & 0xff] = KEY_F9,
62 	[KEY_SYM_F10 & 0xff] = KEY_F10,
63 	[KEY_SYM_F11 & 0xff] = KEY_F11,
64 	[KEY_SYM_F12 & 0xff] = KEY_F12,
65 	[KEY_SYM_CAP_LOCK & 0xff] = KEY_CAPSLOCK,
66 	[KEY_SYM_NUM_LOCK & 0xff] = KEY_NUMLOCK,
67 	[KEY_SYM_SCR_LOCK & 0xff] = KEY_SCROLLLOCK,
68 };
69 
70 static const unsigned short xlate[XLATE_SIZE] = {
71 	[NO_KEYCODE] = KEY_RESERVED,
72 	[KEY_SYM_SPACE] = KEY_SPACE,
73 	[KEY_SYM_TILDE] = KEY_GRAVE,        [KEY_SYM_BKTIC] = KEY_GRAVE,
74 	[KEY_SYM_ONE] = KEY_1,              [KEY_SYM_BANG] = KEY_1,
75 	[KEY_SYM_TWO] = KEY_2,              [KEY_SYM_AT] = KEY_2,
76 	[KEY_SYM_THREE] = KEY_3,            [KEY_SYM_POUND] = KEY_3,
77 	[KEY_SYM_FOUR] = KEY_4,             [KEY_SYM_DOLLAR] = KEY_4,
78 	[KEY_SYM_FIVE] = KEY_5,             [KEY_SYM_PERCENT] = KEY_5,
79 	[KEY_SYM_SIX] = KEY_6,              [KEY_SYM_CARAT] = KEY_6,
80 	[KEY_SYM_SEVEN] = KEY_7,            [KEY_SYM_AMPER] = KEY_7,
81 	[KEY_SYM_EIGHT] = KEY_8,            [KEY_SYM_STAR] = KEY_8,
82 	[KEY_SYM_NINE] = KEY_9,             [KEY_SYM_LPAREN] = KEY_9,
83 	[KEY_SYM_ZERO] = KEY_0,             [KEY_SYM_RPAREN] = KEY_0,
84 	[KEY_SYM_MINUS] = KEY_MINUS,        [KEY_SYM_USCORE] = KEY_MINUS,
85 	[KEY_SYM_EQUAL] = KEY_EQUAL,        [KEY_SYM_PLUS] = KEY_EQUAL,
86 	[KEY_SYM_LBRKT] = KEY_LEFTBRACE,    [KEY_SYM_LCURLY] = KEY_LEFTBRACE,
87 	[KEY_SYM_RBRKT] = KEY_RIGHTBRACE,   [KEY_SYM_RCURLY] = KEY_RIGHTBRACE,
88 	[KEY_SYM_SLASH] = KEY_BACKSLASH,    [KEY_SYM_PIPE] = KEY_BACKSLASH,
89 	[KEY_SYM_TIC] = KEY_APOSTROPHE,     [KEY_SYM_QUOTE] = KEY_APOSTROPHE,
90 	[KEY_SYM_SEMIC] = KEY_SEMICOLON,    [KEY_SYM_COLON] = KEY_SEMICOLON,
91 	[KEY_SYM_COMMA] = KEY_COMMA,        [KEY_SYM_LT] = KEY_COMMA,
92 	[KEY_SYM_PERIOD] = KEY_DOT,         [KEY_SYM_GT] = KEY_DOT,
93 	[KEY_SYM_BSLASH] = KEY_SLASH,       [KEY_SYM_QMARK] = KEY_SLASH,
94 	[KEY_SYM_A] = KEY_A,                [KEY_SYM_a] = KEY_A,
95 	[KEY_SYM_B] = KEY_B,                [KEY_SYM_b] = KEY_B,
96 	[KEY_SYM_C] = KEY_C,                [KEY_SYM_c] = KEY_C,
97 	[KEY_SYM_D] = KEY_D,                [KEY_SYM_d] = KEY_D,
98 	[KEY_SYM_E] = KEY_E,                [KEY_SYM_e] = KEY_E,
99 	[KEY_SYM_F] = KEY_F,                [KEY_SYM_f] = KEY_F,
100 	[KEY_SYM_G] = KEY_G,                [KEY_SYM_g] = KEY_G,
101 	[KEY_SYM_H] = KEY_H,                [KEY_SYM_h] = KEY_H,
102 	[KEY_SYM_I] = KEY_I,                [KEY_SYM_i] = KEY_I,
103 	[KEY_SYM_J] = KEY_J,                [KEY_SYM_j] = KEY_J,
104 	[KEY_SYM_K] = KEY_K,                [KEY_SYM_k] = KEY_K,
105 	[KEY_SYM_L] = KEY_L,                [KEY_SYM_l] = KEY_L,
106 	[KEY_SYM_M] = KEY_M,                [KEY_SYM_m] = KEY_M,
107 	[KEY_SYM_N] = KEY_N,                [KEY_SYM_n] = KEY_N,
108 	[KEY_SYM_O] = KEY_O,                [KEY_SYM_o] = KEY_O,
109 	[KEY_SYM_P] = KEY_P,                [KEY_SYM_p] = KEY_P,
110 	[KEY_SYM_Q] = KEY_Q,                [KEY_SYM_q] = KEY_Q,
111 	[KEY_SYM_R] = KEY_R,                [KEY_SYM_r] = KEY_R,
112 	[KEY_SYM_S] = KEY_S,                [KEY_SYM_s] = KEY_S,
113 	[KEY_SYM_T] = KEY_T,                [KEY_SYM_t] = KEY_T,
114 	[KEY_SYM_U] = KEY_U,                [KEY_SYM_u] = KEY_U,
115 	[KEY_SYM_V] = KEY_V,                [KEY_SYM_v] = KEY_V,
116 	[KEY_SYM_W] = KEY_W,                [KEY_SYM_w] = KEY_W,
117 	[KEY_SYM_X] = KEY_X,                [KEY_SYM_x] = KEY_X,
118 	[KEY_SYM_Y] = KEY_Y,                [KEY_SYM_y] = KEY_Y,
119 	[KEY_SYM_Z] = KEY_Z,                [KEY_SYM_z] = KEY_Z,
120 };
121 
print_input(struct remote_input * input)122 static void print_input(struct remote_input *input)
123 {
124 	if (input->type == INPUT_TYPE_MOUSE) {
125 		unsigned char buttons = input->mouse_buttons;
126 		dbg("remote mouse movement: (x,y)=(%d,%d)%s%s%s%s\n",
127 			input->data.mouse.x, input->data.mouse.y,
128 			(buttons) ? " -- buttons:" : "",
129 			(buttons & REMOTE_BUTTON_LEFT) ? "left " : "",
130 			(buttons & REMOTE_BUTTON_MIDDLE) ? "middle " : "",
131 			(buttons & REMOTE_BUTTON_RIGHT) ? "right" : ""
132 		      );
133 	} else {
134 		dbg("remote keypress (code, flag, down):"
135 			   "%d (0x%x) [0x%x] [0x%x]\n",
136 				input->data.keyboard.key_code,
137 				input->data.keyboard.key_code,
138 				input->data.keyboard.key_flag,
139 				input->data.keyboard.key_down
140 		      );
141 	}
142 }
143 
send_mouse_event(struct input_dev * dev,struct remote_input * input)144 static void send_mouse_event(struct input_dev *dev, struct remote_input *input)
145 {
146 	unsigned char buttons = input->mouse_buttons;
147 
148 	input_report_abs(dev, ABS_X, input->data.mouse.x);
149 	input_report_abs(dev, ABS_Y, input->data.mouse.y);
150 	input_report_key(dev, BTN_LEFT, buttons & REMOTE_BUTTON_LEFT);
151 	input_report_key(dev, BTN_MIDDLE, buttons & REMOTE_BUTTON_MIDDLE);
152 	input_report_key(dev, BTN_RIGHT, buttons & REMOTE_BUTTON_RIGHT);
153 	input_sync(dev);
154 }
155 
send_keyboard_event(struct input_dev * dev,struct remote_input * input)156 static void send_keyboard_event(struct input_dev *dev,
157 		struct remote_input *input)
158 {
159 	unsigned int key;
160 	unsigned short code = input->data.keyboard.key_code;
161 
162 	if (code & 0xff00)
163 		key = xlate_high[code & 0xff];
164 	else
165 		key = xlate[code];
166 	input_report_key(dev, key, input->data.keyboard.key_down);
167 	input_sync(dev);
168 }
169 
ibmasm_handle_mouse_interrupt(struct service_processor * sp)170 void ibmasm_handle_mouse_interrupt(struct service_processor *sp)
171 {
172 	unsigned long reader;
173 	unsigned long writer;
174 	struct remote_input input;
175 
176 	reader = get_queue_reader(sp);
177 	writer = get_queue_writer(sp);
178 
179 	while (reader != writer) {
180 		memcpy_fromio(&input, get_queue_entry(sp, reader),
181 				sizeof(struct remote_input));
182 
183 		print_input(&input);
184 		if (input.type == INPUT_TYPE_MOUSE) {
185 			send_mouse_event(sp->remote.mouse_dev, &input);
186 		} else if (input.type == INPUT_TYPE_KEYBOARD) {
187 			send_keyboard_event(sp->remote.keybd_dev, &input);
188 		} else
189 			break;
190 
191 		reader = advance_queue_reader(sp, reader);
192 		writer = get_queue_writer(sp);
193 	}
194 }
195 
ibmasm_init_remote_input_dev(struct service_processor * sp)196 int ibmasm_init_remote_input_dev(struct service_processor *sp)
197 {
198 	/* set up the mouse input device */
199 	struct input_dev *mouse_dev, *keybd_dev;
200 	struct pci_dev *pdev = to_pci_dev(sp->dev);
201 	int error = -ENOMEM;
202 	int i;
203 
204 	sp->remote.mouse_dev = mouse_dev = input_allocate_device();
205 	sp->remote.keybd_dev = keybd_dev = input_allocate_device();
206 
207 	if (!mouse_dev || !keybd_dev)
208 		goto err_free_devices;
209 
210 	mouse_dev->id.bustype = BUS_PCI;
211 	mouse_dev->id.vendor = pdev->vendor;
212 	mouse_dev->id.product = pdev->device;
213 	mouse_dev->id.version = 1;
214 	mouse_dev->dev.parent = sp->dev;
215 	mouse_dev->evbit[0]  = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
216 	mouse_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
217 		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
218 	set_bit(BTN_TOUCH, mouse_dev->keybit);
219 	mouse_dev->name = "ibmasm RSA I remote mouse";
220 	input_set_abs_params(mouse_dev, ABS_X, 0, MOUSE_X_MAX, 0, 0);
221 	input_set_abs_params(mouse_dev, ABS_Y, 0, MOUSE_Y_MAX, 0, 0);
222 
223 	keybd_dev->id.bustype = BUS_PCI;
224 	keybd_dev->id.vendor = pdev->vendor;
225 	keybd_dev->id.product = pdev->device;
226 	keybd_dev->id.version = 2;
227 	keybd_dev->dev.parent = sp->dev;
228 	keybd_dev->evbit[0]  = BIT_MASK(EV_KEY);
229 	keybd_dev->name = "ibmasm RSA I remote keyboard";
230 
231 	for (i = 0; i < XLATE_SIZE; i++) {
232 		if (xlate_high[i])
233 			set_bit(xlate_high[i], keybd_dev->keybit);
234 		if (xlate[i])
235 			set_bit(xlate[i], keybd_dev->keybit);
236 	}
237 
238 	error = input_register_device(mouse_dev);
239 	if (error)
240 		goto err_free_devices;
241 
242 	error = input_register_device(keybd_dev);
243 	if (error)
244 		goto err_unregister_mouse_dev;
245 
246 	enable_mouse_interrupts(sp);
247 
248 	printk(KERN_INFO "ibmasm remote responding to events on RSA card %d\n", sp->number);
249 
250 	return 0;
251 
252  err_unregister_mouse_dev:
253 	input_unregister_device(mouse_dev);
254 	mouse_dev = NULL; /* so we don't try to free it again below */
255  err_free_devices:
256 	input_free_device(mouse_dev);
257 	input_free_device(keybd_dev);
258 
259 	return error;
260 }
261 
ibmasm_free_remote_input_dev(struct service_processor * sp)262 void ibmasm_free_remote_input_dev(struct service_processor *sp)
263 {
264 	disable_mouse_interrupts(sp);
265 	input_unregister_device(sp->remote.mouse_dev);
266 	input_unregister_device(sp->remote.keybd_dev);
267 }
268 
269