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11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/device.h>
16#include <linux/spinlock.h>
17
18#include <media/v4l2-device.h>
19
20#include <sound/core.h>
21#include <sound/initval.h>
22
23#include "cx18-driver.h"
24#include "cx18-version.h"
25#include "cx18-alsa.h"
26#include "cx18-alsa-pcm.h"
27
28int cx18_alsa_debug;
29
30#define CX18_DEBUG_ALSA_INFO(fmt, arg...) \
31 do { \
32 if (cx18_alsa_debug & 2) \
33 printk(KERN_INFO "%s: " fmt, "cx18-alsa", ## arg); \
34 } while (0);
35
36module_param_named(debug, cx18_alsa_debug, int, 0644);
37MODULE_PARM_DESC(debug,
38 "Debug level (bitmask). Default: 0\n"
39 "\t\t\t 1/0x0001: warning\n"
40 "\t\t\t 2/0x0002: info\n");
41
42MODULE_AUTHOR("Andy Walls");
43MODULE_DESCRIPTION("CX23418 ALSA Interface");
44MODULE_SUPPORTED_DEVICE("CX23418 MPEG2 encoder");
45MODULE_LICENSE("GPL");
46
47MODULE_VERSION(CX18_VERSION);
48
49static inline
50struct snd_cx18_card *to_snd_cx18_card(struct v4l2_device *v4l2_dev)
51{
52 return to_cx18(v4l2_dev)->alsa;
53}
54
55static inline
56struct snd_cx18_card *p_to_snd_cx18_card(struct v4l2_device **v4l2_dev)
57{
58 return container_of(v4l2_dev, struct snd_cx18_card, v4l2_dev);
59}
60
61static void snd_cx18_card_free(struct snd_cx18_card *cxsc)
62{
63 if (cxsc == NULL)
64 return;
65
66 if (cxsc->v4l2_dev != NULL)
67 to_cx18(cxsc->v4l2_dev)->alsa = NULL;
68
69
70
71 kfree(cxsc);
72}
73
74static void snd_cx18_card_private_free(struct snd_card *sc)
75{
76 if (sc == NULL)
77 return;
78 snd_cx18_card_free(sc->private_data);
79 sc->private_data = NULL;
80 sc->private_free = NULL;
81}
82
83static int snd_cx18_card_create(struct v4l2_device *v4l2_dev,
84 struct snd_card *sc,
85 struct snd_cx18_card **cxsc)
86{
87 *cxsc = kzalloc(sizeof(struct snd_cx18_card), GFP_KERNEL);
88 if (*cxsc == NULL)
89 return -ENOMEM;
90
91 (*cxsc)->v4l2_dev = v4l2_dev;
92 (*cxsc)->sc = sc;
93
94 sc->private_data = *cxsc;
95 sc->private_free = snd_cx18_card_private_free;
96
97 return 0;
98}
99
100static int snd_cx18_card_set_names(struct snd_cx18_card *cxsc)
101{
102 struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
103 struct snd_card *sc = cxsc->sc;
104
105
106 strscpy(sc->driver, "CX23418", sizeof(sc->driver));
107
108
109 snprintf(sc->shortname, sizeof(sc->shortname), "CX18-%d",
110 cx->instance);
111
112
113 snprintf(sc->longname, sizeof(sc->longname),
114 "CX23418 #%d %s TV/FM Radio/Line-In Capture",
115 cx->instance, cx->card_name);
116
117 return 0;
118}
119
120static int snd_cx18_init(struct v4l2_device *v4l2_dev)
121{
122 struct cx18 *cx = to_cx18(v4l2_dev);
123 struct snd_card *sc = NULL;
124 struct snd_cx18_card *cxsc;
125 int ret;
126
127
128
129
130
131
132
133 ret = snd_card_new(&cx->pci_dev->dev,
134 SNDRV_DEFAULT_IDX1,
135 SNDRV_DEFAULT_STR1,
136 THIS_MODULE, 0, &sc);
137 if (ret) {
138 CX18_ALSA_ERR("%s: snd_card_new() failed with err %d\n",
139 __func__, ret);
140 goto err_exit;
141 }
142
143
144 ret = snd_cx18_card_create(v4l2_dev, sc, &cxsc);
145 if (ret) {
146 CX18_ALSA_ERR("%s: snd_cx18_card_create() failed with err %d\n",
147 __func__, ret);
148 goto err_exit_free;
149 }
150
151
152 snd_cx18_card_set_names(cxsc);
153
154
155 ret = snd_cx18_pcm_create(cxsc);
156 if (ret) {
157 CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n",
158 __func__, ret);
159 goto err_exit_free;
160 }
161
162
163
164
165 cx->alsa = cxsc;
166
167
168 ret = snd_card_register(sc);
169 if (ret) {
170 cx->alsa = NULL;
171 CX18_ALSA_ERR("%s: snd_card_register() failed with err %d\n",
172 __func__, ret);
173 goto err_exit_free;
174 }
175
176 return 0;
177
178err_exit_free:
179 if (sc != NULL)
180 snd_card_free(sc);
181 kfree(cxsc);
182err_exit:
183 return ret;
184}
185
186static int cx18_alsa_load(struct cx18 *cx)
187{
188 struct v4l2_device *v4l2_dev = &cx->v4l2_dev;
189 struct cx18_stream *s;
190
191 if (v4l2_dev == NULL) {
192 printk(KERN_ERR "cx18-alsa: %s: struct v4l2_device * is NULL\n",
193 __func__);
194 return 0;
195 }
196
197 cx = to_cx18(v4l2_dev);
198 if (cx == NULL) {
199 printk(KERN_ERR "cx18-alsa cx is NULL\n");
200 return 0;
201 }
202
203 s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
204 if (s->video_dev.v4l2_dev == NULL) {
205 CX18_DEBUG_ALSA_INFO("%s: PCM stream for card is disabled - skipping\n",
206 __func__);
207 return 0;
208 }
209
210 if (cx->alsa != NULL) {
211 CX18_ALSA_ERR("%s: struct snd_cx18_card * already exists\n",
212 __func__);
213 return 0;
214 }
215
216 if (snd_cx18_init(v4l2_dev)) {
217 CX18_ALSA_ERR("%s: failed to create struct snd_cx18_card\n",
218 __func__);
219 } else {
220 CX18_DEBUG_ALSA_INFO("%s: created cx18 ALSA interface instance\n",
221 __func__);
222 }
223 return 0;
224}
225
226static int __init cx18_alsa_init(void)
227{
228 printk(KERN_INFO "cx18-alsa: module loading...\n");
229 cx18_ext_init = &cx18_alsa_load;
230 return 0;
231}
232
233static void __exit snd_cx18_exit(struct snd_cx18_card *cxsc)
234{
235 struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
236
237
238
239 snd_card_free(cxsc->sc);
240 cx->alsa = NULL;
241}
242
243static int __exit cx18_alsa_exit_callback(struct device *dev, void *data)
244{
245 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
246 struct snd_cx18_card *cxsc;
247
248 if (v4l2_dev == NULL) {
249 printk(KERN_ERR "cx18-alsa: %s: struct v4l2_device * is NULL\n",
250 __func__);
251 return 0;
252 }
253
254 cxsc = to_snd_cx18_card(v4l2_dev);
255 if (cxsc == NULL) {
256 CX18_ALSA_WARN("%s: struct snd_cx18_card * is NULL\n",
257 __func__);
258 return 0;
259 }
260
261 snd_cx18_exit(cxsc);
262 return 0;
263}
264
265static void __exit cx18_alsa_exit(void)
266{
267 struct device_driver *drv;
268 int ret;
269
270 printk(KERN_INFO "cx18-alsa: module unloading...\n");
271
272 drv = driver_find("cx18", &pci_bus_type);
273 ret = driver_for_each_device(drv, NULL, NULL, cx18_alsa_exit_callback);
274 (void)ret;
275
276 cx18_ext_init = NULL;
277 printk(KERN_INFO "cx18-alsa: module unload complete\n");
278}
279
280module_init(cx18_alsa_init);
281module_exit(cx18_alsa_exit);
282
