diff options
-rw-r--r-- | drivers/media/rc/Kconfig | 13 | ||||
-rw-r--r-- | drivers/media/rc/Makefile | 1 | ||||
-rw-r--r-- | drivers/media/rc/rc-loopback.c | 260 |
3 files changed, 274 insertions, 0 deletions
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig index 42b4feb0e7f9..3785162f928e 100644 --- a/drivers/media/rc/Kconfig +++ b/drivers/media/rc/Kconfig | |||
@@ -177,4 +177,17 @@ config IR_WINBOND_CIR | |||
177 | To compile this driver as a module, choose M here: the module will | 177 | To compile this driver as a module, choose M here: the module will |
178 | be called winbond_cir. | 178 | be called winbond_cir. |
179 | 179 | ||
180 | config RC_LOOPBACK | ||
181 | tristate "Remote Control Loopback Driver" | ||
182 | depends on RC_CORE | ||
183 | ---help--- | ||
184 | Say Y here if you want support for the remote control loopback | ||
185 | driver which allows TX data to be sent back as RX data. | ||
186 | This is mostly useful for debugging purposes. | ||
187 | |||
188 | If you're not sure, select N here. | ||
189 | |||
190 | To compile this driver as a module, choose M here: the module will | ||
191 | be called rc_loopback. | ||
192 | |||
180 | endif #RC_CORE | 193 | endif #RC_CORE |
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile index 78ac8c5c8adc..67b4f7fe2577 100644 --- a/drivers/media/rc/Makefile +++ b/drivers/media/rc/Makefile | |||
@@ -19,3 +19,4 @@ obj-$(CONFIG_IR_NUVOTON) += nuvoton-cir.o | |||
19 | obj-$(CONFIG_IR_ENE) += ene_ir.o | 19 | obj-$(CONFIG_IR_ENE) += ene_ir.o |
20 | obj-$(CONFIG_IR_STREAMZAP) += streamzap.o | 20 | obj-$(CONFIG_IR_STREAMZAP) += streamzap.o |
21 | obj-$(CONFIG_IR_WINBOND_CIR) += winbond-cir.o | 21 | obj-$(CONFIG_IR_WINBOND_CIR) += winbond-cir.o |
22 | obj-$(CONFIG_RC_LOOPBACK) += rc-loopback.o | ||
diff --git a/drivers/media/rc/rc-loopback.c b/drivers/media/rc/rc-loopback.c new file mode 100644 index 000000000000..49cee61d79c6 --- /dev/null +++ b/drivers/media/rc/rc-loopback.c | |||
@@ -0,0 +1,260 @@ | |||
1 | /* | ||
2 | * Loopback driver for rc-core, | ||
3 | * | ||
4 | * Copyright (c) 2010 David Härdeman <david@hardeman.nu> | ||
5 | * | ||
6 | * This driver receives TX data and passes it back as RX data, | ||
7 | * which is useful for (scripted) debugging of rc-core without | ||
8 | * having to use actual hardware. | ||
9 | * | ||
10 | * This program is free software; you can redistribute it and/or modify | ||
11 | * it under the terms of the GNU General Public License as published by | ||
12 | * the Free Software Foundation; either version 2 of the License, or | ||
13 | * (at your option) any later version. | ||
14 | * | ||
15 | * This program is distributed in the hope that it will be useful, | ||
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
18 | * GNU General Public License for more details. | ||
19 | * | ||
20 | * You should have received a copy of the GNU General Public License | ||
21 | * along with this program; if not, write to the Free Software | ||
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
23 | * | ||
24 | */ | ||
25 | |||
26 | #include <linux/device.h> | ||
27 | #include <linux/module.h> | ||
28 | #include <linux/sched.h> | ||
29 | #include <media/rc-core.h> | ||
30 | |||
31 | #define DRIVER_NAME "rc-loopback" | ||
32 | #define dprintk(x...) if (debug) printk(KERN_INFO DRIVER_NAME ": " x) | ||
33 | #define RXMASK_REGULAR 0x1 | ||
34 | #define RXMASK_LEARNING 0x2 | ||
35 | |||
36 | static bool debug; | ||
37 | |||
38 | struct loopback_dev { | ||
39 | struct rc_dev *dev; | ||
40 | u32 txmask; | ||
41 | u32 txcarrier; | ||
42 | u32 txduty; | ||
43 | bool idle; | ||
44 | bool learning; | ||
45 | bool carrierreport; | ||
46 | u32 rxcarriermin; | ||
47 | u32 rxcarriermax; | ||
48 | }; | ||
49 | |||
50 | static struct loopback_dev loopdev; | ||
51 | |||
52 | static int loop_set_tx_mask(struct rc_dev *dev, u32 mask) | ||
53 | { | ||
54 | struct loopback_dev *lodev = dev->priv; | ||
55 | |||
56 | if ((mask & (RXMASK_REGULAR | RXMASK_LEARNING)) != mask) { | ||
57 | dprintk("invalid tx mask: %u\n", mask); | ||
58 | return -EINVAL; | ||
59 | } | ||
60 | |||
61 | dprintk("setting tx mask: %u\n", mask); | ||
62 | lodev->txmask = mask; | ||
63 | return 0; | ||
64 | } | ||
65 | |||
66 | static int loop_set_tx_carrier(struct rc_dev *dev, u32 carrier) | ||
67 | { | ||
68 | struct loopback_dev *lodev = dev->priv; | ||
69 | |||
70 | dprintk("setting tx carrier: %u\n", carrier); | ||
71 | lodev->txcarrier = carrier; | ||
72 | return 0; | ||
73 | } | ||
74 | |||
75 | static int loop_set_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle) | ||
76 | { | ||
77 | struct loopback_dev *lodev = dev->priv; | ||
78 | |||
79 | if (duty_cycle < 1 || duty_cycle > 99) { | ||
80 | dprintk("invalid duty cycle: %u\n", duty_cycle); | ||
81 | return -EINVAL; | ||
82 | } | ||
83 | |||
84 | dprintk("setting duty cycle: %u\n", duty_cycle); | ||
85 | lodev->txduty = duty_cycle; | ||
86 | return 0; | ||
87 | } | ||
88 | |||
89 | static int loop_set_rx_carrier_range(struct rc_dev *dev, u32 min, u32 max) | ||
90 | { | ||
91 | struct loopback_dev *lodev = dev->priv; | ||
92 | |||
93 | if (min < 1 || min > max) { | ||
94 | dprintk("invalid rx carrier range %u to %u\n", min, max); | ||
95 | return -EINVAL; | ||
96 | } | ||
97 | |||
98 | dprintk("setting rx carrier range %u to %u\n", min, max); | ||
99 | lodev->rxcarriermin = min; | ||
100 | lodev->rxcarriermax = max; | ||
101 | return 0; | ||
102 | } | ||
103 | |||
104 | static int loop_tx_ir(struct rc_dev *dev, int *txbuf, u32 n) | ||
105 | { | ||
106 | struct loopback_dev *lodev = dev->priv; | ||
107 | u32 rxmask; | ||
108 | unsigned count; | ||
109 | unsigned total_duration = 0; | ||
110 | unsigned i; | ||
111 | DEFINE_IR_RAW_EVENT(rawir); | ||
112 | |||
113 | if (n == 0 || n % sizeof(int)) { | ||
114 | dprintk("invalid tx buffer size\n"); | ||
115 | return -EINVAL; | ||
116 | } | ||
117 | |||
118 | count = n / sizeof(int); | ||
119 | for (i = 0; i < count; i++) | ||
120 | total_duration += abs(txbuf[i]); | ||
121 | |||
122 | if (total_duration == 0) { | ||
123 | dprintk("invalid tx data, total duration zero\n"); | ||
124 | return -EINVAL; | ||
125 | } | ||
126 | |||
127 | if (lodev->txcarrier < lodev->rxcarriermin || | ||
128 | lodev->txcarrier > lodev->rxcarriermax) { | ||
129 | dprintk("ignoring tx, carrier out of range\n"); | ||
130 | goto out; | ||
131 | } | ||
132 | |||
133 | if (lodev->learning) | ||
134 | rxmask = RXMASK_LEARNING; | ||
135 | else | ||
136 | rxmask = RXMASK_REGULAR; | ||
137 | |||
138 | if (!(rxmask & lodev->txmask)) { | ||
139 | dprintk("ignoring tx, rx mask mismatch\n"); | ||
140 | goto out; | ||
141 | } | ||
142 | |||
143 | for (i = 0; i < count; i++) { | ||
144 | rawir.pulse = i % 2 ? false : true; | ||
145 | rawir.duration = abs(txbuf[i]) * 1000; | ||
146 | if (rawir.duration) | ||
147 | ir_raw_event_store_with_filter(dev, &rawir); | ||
148 | } | ||
149 | ir_raw_event_handle(dev); | ||
150 | |||
151 | out: | ||
152 | /* Lirc expects this function to take as long as the total duration */ | ||
153 | set_current_state(TASK_INTERRUPTIBLE); | ||
154 | schedule_timeout(usecs_to_jiffies(total_duration)); | ||
155 | return n; | ||
156 | } | ||
157 | |||
158 | static void loop_set_idle(struct rc_dev *dev, bool enable) | ||
159 | { | ||
160 | struct loopback_dev *lodev = dev->priv; | ||
161 | |||
162 | if (lodev->idle != enable) { | ||
163 | dprintk("%sing idle mode\n", enable ? "enter" : "exit"); | ||
164 | lodev->idle = enable; | ||
165 | } | ||
166 | } | ||
167 | |||
168 | static int loop_set_learning_mode(struct rc_dev *dev, int enable) | ||
169 | { | ||
170 | struct loopback_dev *lodev = dev->priv; | ||
171 | |||
172 | if (lodev->learning != enable) { | ||
173 | dprintk("%sing learning mode\n", enable ? "enter" : "exit"); | ||
174 | lodev->learning = !!enable; | ||
175 | } | ||
176 | |||
177 | return 0; | ||
178 | } | ||
179 | |||
180 | static int loop_set_carrier_report(struct rc_dev *dev, int enable) | ||
181 | { | ||
182 | struct loopback_dev *lodev = dev->priv; | ||
183 | |||
184 | if (lodev->carrierreport != enable) { | ||
185 | dprintk("%sabling carrier reports\n", enable ? "en" : "dis"); | ||
186 | lodev->carrierreport = !!enable; | ||
187 | } | ||
188 | |||
189 | return 0; | ||
190 | } | ||
191 | |||
192 | static int __init loop_init(void) | ||
193 | { | ||
194 | struct rc_dev *rc; | ||
195 | int ret; | ||
196 | |||
197 | rc = rc_allocate_device(); | ||
198 | if (!rc) { | ||
199 | printk(KERN_ERR DRIVER_NAME ": rc_dev allocation failed\n"); | ||
200 | return -ENOMEM; | ||
201 | } | ||
202 | |||
203 | rc->input_name = "rc-core loopback device"; | ||
204 | rc->input_phys = "rc-core/virtual"; | ||
205 | rc->input_id.bustype = BUS_VIRTUAL; | ||
206 | rc->input_id.version = 1; | ||
207 | rc->driver_name = DRIVER_NAME; | ||
208 | rc->map_name = RC_MAP_EMPTY; | ||
209 | rc->priv = &loopdev; | ||
210 | rc->driver_type = RC_DRIVER_IR_RAW; | ||
211 | rc->allowed_protos = RC_TYPE_ALL; | ||
212 | rc->timeout = 100 * 1000 * 1000; /* 100 ms */ | ||
213 | rc->min_timeout = 1; | ||
214 | rc->max_timeout = UINT_MAX; | ||
215 | rc->rx_resolution = 1000; | ||
216 | rc->tx_resolution = 1000; | ||
217 | rc->s_tx_mask = loop_set_tx_mask; | ||
218 | rc->s_tx_carrier = loop_set_tx_carrier; | ||
219 | rc->s_tx_duty_cycle = loop_set_tx_duty_cycle; | ||
220 | rc->s_rx_carrier_range = loop_set_rx_carrier_range; | ||
221 | rc->tx_ir = loop_tx_ir; | ||
222 | rc->s_idle = loop_set_idle; | ||
223 | rc->s_learning_mode = loop_set_learning_mode; | ||
224 | rc->s_carrier_report = loop_set_carrier_report; | ||
225 | rc->priv = &loopdev; | ||
226 | |||
227 | loopdev.txmask = RXMASK_REGULAR; | ||
228 | loopdev.txcarrier = 36000; | ||
229 | loopdev.txduty = 50; | ||
230 | loopdev.rxcarriermin = 1; | ||
231 | loopdev.rxcarriermax = ~0; | ||
232 | loopdev.idle = true; | ||
233 | loopdev.learning = false; | ||
234 | loopdev.carrierreport = false; | ||
235 | |||
236 | ret = rc_register_device(rc); | ||
237 | if (ret < 0) { | ||
238 | printk(KERN_ERR DRIVER_NAME ": rc_dev registration failed\n"); | ||
239 | rc_free_device(rc); | ||
240 | return ret; | ||
241 | } | ||
242 | |||
243 | loopdev.dev = rc; | ||
244 | return 0; | ||
245 | } | ||
246 | |||
247 | static void __exit loop_exit(void) | ||
248 | { | ||
249 | rc_unregister_device(loopdev.dev); | ||
250 | } | ||
251 | |||
252 | module_init(loop_init); | ||
253 | module_exit(loop_exit); | ||
254 | |||
255 | module_param(debug, bool, S_IRUGO | S_IWUSR); | ||
256 | MODULE_PARM_DESC(debug, "Enable debug messages"); | ||
257 | |||
258 | MODULE_DESCRIPTION("Loopback device for rc-core debugging"); | ||
259 | MODULE_AUTHOR("David Härdeman <david@hardeman.nu>"); | ||
260 | MODULE_LICENSE("GPL"); | ||