1 /* SF16-FMI, SF16-FMP and SF16-FMD radio driver for Linux radio support
2 * heavily based on rtrack driver...
4 * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
6 * Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>
7 * Made working and cleaned up functions <mikael.hedin@irf.se>
8 * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
10 * Notes on the hardware
12 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
13 * No volume control - only mute/unmute - you have to use line volume
14 * control on SB-part of SF16-FMI/SF16-FMP/SF16-FMD
16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
19 #include <linux/kernel.h> /* __setup */
20 #include <linux/module.h> /* Modules */
21 #include <linux/init.h> /* Initdata */
22 #include <linux/ioport.h> /* request_region */
23 #include <linux/delay.h> /* udelay */
24 #include <linux/isapnp.h>
25 #include <linux/mutex.h>
26 #include <linux/videodev2.h> /* kernel radio structs */
27 #include <linux/io.h> /* outb, outb_p */
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-ctrls.h>
31 #include <media/v4l2-event.h>
34 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
35 MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio.");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.0.3");
40 static int radio_nr = -1;
42 module_param(io, int, 0);
43 MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)");
44 module_param(radio_nr, int, 0);
48 struct v4l2_device v4l2_dev;
49 struct v4l2_ctrl_handler hdl;
50 struct video_device vdev;
53 u32 curfreq; /* freq in kHz */
57 static struct fmi fmi_card;
58 static struct pnp_dev *dev;
59 static bool pnp_attached;
61 #define RSF16_MINFREQ (87U * 16000)
62 #define RSF16_MAXFREQ (108U * 16000)
64 #define FMI_BIT_TUN_CE (1 << 0)
65 #define FMI_BIT_TUN_CLK (1 << 1)
66 #define FMI_BIT_TUN_DATA (1 << 2)
67 #define FMI_BIT_VOL_SW (1 << 3)
68 #define FMI_BIT_TUN_STRQ (1 << 4)
70 static void fmi_set_pins(void *handle, u8 pins)
72 struct fmi *fmi = handle;
73 u8 bits = FMI_BIT_TUN_STRQ;
76 bits |= FMI_BIT_VOL_SW;
78 if (pins & LM7000_DATA)
79 bits |= FMI_BIT_TUN_DATA;
80 if (pins & LM7000_CLK)
81 bits |= FMI_BIT_TUN_CLK;
83 bits |= FMI_BIT_TUN_CE;
85 mutex_lock(&fmi->lock);
86 outb_p(bits, fmi->io);
87 mutex_unlock(&fmi->lock);
90 static inline void fmi_mute(struct fmi *fmi)
92 mutex_lock(&fmi->lock);
94 mutex_unlock(&fmi->lock);
97 static inline void fmi_unmute(struct fmi *fmi)
99 mutex_lock(&fmi->lock);
101 mutex_unlock(&fmi->lock);
104 static inline int fmi_getsigstr(struct fmi *fmi)
109 mutex_lock(&fmi->lock);
110 val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */
112 outb(val | 0x10, fmi->io);
113 msleep(143); /* was schedule_timeout(HZ/7) */
114 res = (int)inb(fmi->io + 1);
117 mutex_unlock(&fmi->lock);
118 return (res & 2) ? 0 : 0xFFFF;
121 static void fmi_set_freq(struct fmi *fmi)
123 fmi->curfreq = clamp(fmi->curfreq, RSF16_MINFREQ, RSF16_MAXFREQ);
124 /* rounding in steps of 800 to match the freq
126 lm7000_set_freq((fmi->curfreq / 800) * 800, fmi, fmi_set_pins);
129 static int vidioc_querycap(struct file *file, void *priv,
130 struct v4l2_capability *v)
132 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
133 strlcpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card));
134 strlcpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info));
135 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
136 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
140 static int vidioc_g_tuner(struct file *file, void *priv,
141 struct v4l2_tuner *v)
143 struct fmi *fmi = video_drvdata(file);
148 strlcpy(v->name, "FM", sizeof(v->name));
149 v->type = V4L2_TUNER_RADIO;
150 v->rangelow = RSF16_MINFREQ;
151 v->rangehigh = RSF16_MAXFREQ;
152 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
153 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
154 v->audmode = V4L2_TUNER_MODE_STEREO;
155 v->signal = fmi_getsigstr(fmi);
159 static int vidioc_s_tuner(struct file *file, void *priv,
160 const struct v4l2_tuner *v)
162 return v->index ? -EINVAL : 0;
165 static int vidioc_s_frequency(struct file *file, void *priv,
166 const struct v4l2_frequency *f)
168 struct fmi *fmi = video_drvdata(file);
170 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
173 fmi->curfreq = f->frequency;
179 static int vidioc_g_frequency(struct file *file, void *priv,
180 struct v4l2_frequency *f)
182 struct fmi *fmi = video_drvdata(file);
186 f->type = V4L2_TUNER_RADIO;
187 f->frequency = fmi->curfreq;
191 static int fmi_s_ctrl(struct v4l2_ctrl *ctrl)
193 struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl);
196 case V4L2_CID_AUDIO_MUTE:
201 fmi->mute = ctrl->val;
207 static const struct v4l2_ctrl_ops fmi_ctrl_ops = {
208 .s_ctrl = fmi_s_ctrl,
211 static const struct v4l2_file_operations fmi_fops = {
212 .owner = THIS_MODULE,
213 .open = v4l2_fh_open,
214 .release = v4l2_fh_release,
215 .poll = v4l2_ctrl_poll,
216 .unlocked_ioctl = video_ioctl2,
219 static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
220 .vidioc_querycap = vidioc_querycap,
221 .vidioc_g_tuner = vidioc_g_tuner,
222 .vidioc_s_tuner = vidioc_s_tuner,
223 .vidioc_g_frequency = vidioc_g_frequency,
224 .vidioc_s_frequency = vidioc_s_frequency,
225 .vidioc_log_status = v4l2_ctrl_log_status,
226 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
227 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
230 /* ladis: this is my card. does any other types exist? */
231 static struct isapnp_device_id id_table[] = {
233 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
234 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
236 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
237 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0},
238 { ISAPNP_CARD_END, },
241 MODULE_DEVICE_TABLE(isapnp, id_table);
243 static int __init isapnp_fmi_probe(void)
247 while (id_table[i].card_vendor != 0 && dev == NULL) {
248 dev = pnp_find_dev(NULL, id_table[i].vendor,
249 id_table[i].function, NULL);
255 if (pnp_device_attach(dev) < 0)
257 if (pnp_activate_dev(dev) < 0) {
258 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
259 pnp_device_detach(dev);
262 if (!pnp_port_valid(dev, 0)) {
263 pnp_device_detach(dev);
267 i = pnp_port_start(dev, 0);
268 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
273 static int __init fmi_init(void)
275 struct fmi *fmi = &fmi_card;
276 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
277 struct v4l2_ctrl_handler *hdl = &fmi->hdl;
279 int probe_ports[] = { 0, 0x284, 0x384 };
282 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
285 io = isapnp_fmi_probe();
290 if (!request_region(io, 2, "radio-sf16fmi")) {
292 pnp_device_detach(dev);
297 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
299 release_region(io, 2);
303 if (!request_region(io, 2, "radio-sf16fmi")) {
304 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
307 if (inb(io) == 0xff) {
308 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
309 release_region(io, 2);
314 printk(KERN_ERR "radio-sf16fmi: no cards found\n");
318 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
321 res = v4l2_device_register(NULL, v4l2_dev);
323 release_region(fmi->io, 2);
325 pnp_device_detach(dev);
326 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
330 v4l2_ctrl_handler_init(hdl, 1);
331 v4l2_ctrl_new_std(hdl, &fmi_ctrl_ops,
332 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
333 v4l2_dev->ctrl_handler = hdl;
336 v4l2_err(v4l2_dev, "Could not register controls\n");
337 v4l2_ctrl_handler_free(hdl);
338 v4l2_device_unregister(v4l2_dev);
342 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
343 fmi->vdev.v4l2_dev = v4l2_dev;
344 fmi->vdev.fops = &fmi_fops;
345 fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
346 fmi->vdev.release = video_device_release_empty;
347 video_set_drvdata(&fmi->vdev, fmi);
349 mutex_init(&fmi->lock);
351 /* mute card and set default frequency */
353 fmi->curfreq = RSF16_MINFREQ;
356 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
357 v4l2_ctrl_handler_free(hdl);
358 v4l2_device_unregister(v4l2_dev);
359 release_region(fmi->io, 2);
361 pnp_device_detach(dev);
365 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
369 static void __exit fmi_exit(void)
371 struct fmi *fmi = &fmi_card;
373 v4l2_ctrl_handler_free(&fmi->hdl);
374 video_unregister_device(&fmi->vdev);
375 v4l2_device_unregister(&fmi->v4l2_dev);
376 release_region(fmi->io, 2);
377 if (dev && pnp_attached)
378 pnp_device_detach(dev);
381 module_init(fmi_init);
382 module_exit(fmi_exit);