383 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* SF16-FMI, SF16-FMP and SF16-FMD radio driver for Linux radio support3 * heavily based on rtrack driver...4 * (c) 1997 M. Kirkwood5 * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz6 *7 * Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>8 * Made working and cleaned up functions <mikael.hedin@irf.se>9 * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>10 *11 * Notes on the hardware12 *13 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));14 * No volume control - only mute/unmute - you have to use line volume15 * control on SB-part of SF16-FMI/SF16-FMP/SF16-FMD16 *17 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>18 */19 20#include <linux/kernel.h> /* __setup */21#include <linux/module.h> /* Modules */22#include <linux/init.h> /* Initdata */23#include <linux/ioport.h> /* request_region */24#include <linux/delay.h> /* udelay */25#include <linux/isapnp.h>26#include <linux/mutex.h>27#include <linux/videodev2.h> /* kernel radio structs */28#include <linux/io.h> /* outb, outb_p */29#include <media/v4l2-device.h>30#include <media/v4l2-ioctl.h>31#include <media/v4l2-ctrls.h>32#include <media/v4l2-event.h>33#include "lm7000.h"34 35MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");36MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio.");37MODULE_LICENSE("GPL");38MODULE_VERSION("0.0.3");39 40static int io = -1;41static int radio_nr = -1;42 43module_param(io, int, 0);44MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)");45module_param(radio_nr, int, 0);46 47struct fmi48{49 struct v4l2_device v4l2_dev;50 struct v4l2_ctrl_handler hdl;51 struct video_device vdev;52 int io;53 bool mute;54 u32 curfreq; /* freq in kHz */55 struct mutex lock;56};57 58static struct fmi fmi_card;59static struct pnp_dev *dev;60static bool pnp_attached;61 62#define RSF16_MINFREQ (87U * 16000)63#define RSF16_MAXFREQ (108U * 16000)64 65#define FMI_BIT_TUN_CE (1 << 0)66#define FMI_BIT_TUN_CLK (1 << 1)67#define FMI_BIT_TUN_DATA (1 << 2)68#define FMI_BIT_VOL_SW (1 << 3)69#define FMI_BIT_TUN_STRQ (1 << 4)70 71static void fmi_set_pins(void *handle, u8 pins)72{73 struct fmi *fmi = handle;74 u8 bits = FMI_BIT_TUN_STRQ;75 76 if (!fmi->mute)77 bits |= FMI_BIT_VOL_SW;78 79 if (pins & LM7000_DATA)80 bits |= FMI_BIT_TUN_DATA;81 if (pins & LM7000_CLK)82 bits |= FMI_BIT_TUN_CLK;83 if (pins & LM7000_CE)84 bits |= FMI_BIT_TUN_CE;85 86 mutex_lock(&fmi->lock);87 outb_p(bits, fmi->io);88 mutex_unlock(&fmi->lock);89}90 91static inline void fmi_mute(struct fmi *fmi)92{93 mutex_lock(&fmi->lock);94 outb(0x00, fmi->io);95 mutex_unlock(&fmi->lock);96}97 98static inline void fmi_unmute(struct fmi *fmi)99{100 mutex_lock(&fmi->lock);101 outb(0x08, fmi->io);102 mutex_unlock(&fmi->lock);103}104 105static inline int fmi_getsigstr(struct fmi *fmi)106{107 int val;108 int res;109 110 mutex_lock(&fmi->lock);111 val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */112 outb(val, fmi->io);113 outb(val | 0x10, fmi->io);114 msleep(143); /* was schedule_timeout(HZ/7) */115 res = (int)inb(fmi->io + 1);116 outb(val, fmi->io);117 118 mutex_unlock(&fmi->lock);119 return (res & 2) ? 0 : 0xFFFF;120}121 122static void fmi_set_freq(struct fmi *fmi)123{124 fmi->curfreq = clamp(fmi->curfreq, RSF16_MINFREQ, RSF16_MAXFREQ);125 /* rounding in steps of 800 to match the freq126 that will be used */127 lm7000_set_freq((fmi->curfreq / 800) * 800, fmi, fmi_set_pins);128}129 130static int vidioc_querycap(struct file *file, void *priv,131 struct v4l2_capability *v)132{133 strscpy(v->driver, "radio-sf16fmi", sizeof(v->driver));134 strscpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card));135 strscpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info));136 return 0;137}138 139static int vidioc_g_tuner(struct file *file, void *priv,140 struct v4l2_tuner *v)141{142 struct fmi *fmi = video_drvdata(file);143 144 if (v->index > 0)145 return -EINVAL;146 147 strscpy(v->name, "FM", sizeof(v->name));148 v->type = V4L2_TUNER_RADIO;149 v->rangelow = RSF16_MINFREQ;150 v->rangehigh = RSF16_MAXFREQ;151 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;152 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;153 v->audmode = V4L2_TUNER_MODE_STEREO;154 v->signal = fmi_getsigstr(fmi);155 return 0;156}157 158static int vidioc_s_tuner(struct file *file, void *priv,159 const struct v4l2_tuner *v)160{161 return v->index ? -EINVAL : 0;162}163 164static int vidioc_s_frequency(struct file *file, void *priv,165 const struct v4l2_frequency *f)166{167 struct fmi *fmi = video_drvdata(file);168 169 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)170 return -EINVAL;171 172 fmi->curfreq = f->frequency;173 fmi_set_freq(fmi);174 175 return 0;176}177 178static int vidioc_g_frequency(struct file *file, void *priv,179 struct v4l2_frequency *f)180{181 struct fmi *fmi = video_drvdata(file);182 183 if (f->tuner != 0)184 return -EINVAL;185 f->type = V4L2_TUNER_RADIO;186 f->frequency = fmi->curfreq;187 return 0;188}189 190static int fmi_s_ctrl(struct v4l2_ctrl *ctrl)191{192 struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl);193 194 switch (ctrl->id) {195 case V4L2_CID_AUDIO_MUTE:196 if (ctrl->val)197 fmi_mute(fmi);198 else199 fmi_unmute(fmi);200 fmi->mute = ctrl->val;201 return 0;202 }203 return -EINVAL;204}205 206static const struct v4l2_ctrl_ops fmi_ctrl_ops = {207 .s_ctrl = fmi_s_ctrl,208};209 210static const struct v4l2_file_operations fmi_fops = {211 .owner = THIS_MODULE,212 .open = v4l2_fh_open,213 .release = v4l2_fh_release,214 .poll = v4l2_ctrl_poll,215 .unlocked_ioctl = video_ioctl2,216};217 218static const struct v4l2_ioctl_ops fmi_ioctl_ops = {219 .vidioc_querycap = vidioc_querycap,220 .vidioc_g_tuner = vidioc_g_tuner,221 .vidioc_s_tuner = vidioc_s_tuner,222 .vidioc_g_frequency = vidioc_g_frequency,223 .vidioc_s_frequency = vidioc_s_frequency,224 .vidioc_log_status = v4l2_ctrl_log_status,225 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,226 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,227};228 229/* ladis: this is my card. does any other types exist? */230static struct isapnp_device_id id_table[] = {231 /* SF16-FMI */232 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,233 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},234 /* SF16-FMD */235 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,236 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0},237 { ISAPNP_CARD_END, },238};239 240MODULE_DEVICE_TABLE(isapnp, id_table);241 242static int __init isapnp_fmi_probe(void)243{244 int i = 0;245 246 while (id_table[i].card_vendor != 0 && dev == NULL) {247 dev = pnp_find_dev(NULL, id_table[i].vendor,248 id_table[i].function, NULL);249 i++;250 }251 252 if (!dev)253 return -ENODEV;254 if (pnp_device_attach(dev) < 0)255 return -EAGAIN;256 if (pnp_activate_dev(dev) < 0) {257 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");258 pnp_device_detach(dev);259 return -ENOMEM;260 }261 if (!pnp_port_valid(dev, 0)) {262 pnp_device_detach(dev);263 return -ENODEV;264 }265 266 i = pnp_port_start(dev, 0);267 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);268 269 return i;270}271 272static int __init fmi_init(void)273{274 struct fmi *fmi = &fmi_card;275 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;276 struct v4l2_ctrl_handler *hdl = &fmi->hdl;277 int res, i;278 static const int probe_ports[] = { 0, 0x284, 0x384 };279 280 if (io < 0) {281 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {282 io = probe_ports[i];283 if (io == 0) {284 io = isapnp_fmi_probe();285 if (io < 0)286 continue;287 pnp_attached = true;288 }289 if (!request_region(io, 2, "radio-sf16fmi")) {290 if (pnp_attached)291 pnp_device_detach(dev);292 io = -1;293 continue;294 }295 if (pnp_attached ||296 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))297 break;298 release_region(io, 2);299 io = -1;300 }301 } else {302 if (!request_region(io, 2, "radio-sf16fmi")) {303 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);304 return -EBUSY;305 }306 if (inb(io) == 0xff) {307 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);308 release_region(io, 2);309 return -ENODEV;310 }311 }312 if (io < 0) {313 printk(KERN_ERR "radio-sf16fmi: no cards found\n");314 return -ENODEV;315 }316 317 strscpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));318 fmi->io = io;319 320 res = v4l2_device_register(NULL, v4l2_dev);321 if (res < 0) {322 release_region(fmi->io, 2);323 if (pnp_attached)324 pnp_device_detach(dev);325 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");326 return res;327 }328 329 v4l2_ctrl_handler_init(hdl, 1);330 v4l2_ctrl_new_std(hdl, &fmi_ctrl_ops,331 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);332 v4l2_dev->ctrl_handler = hdl;333 if (hdl->error) {334 res = hdl->error;335 v4l2_err(v4l2_dev, "Could not register controls\n");336 v4l2_ctrl_handler_free(hdl);337 v4l2_device_unregister(v4l2_dev);338 return res;339 }340 341 strscpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));342 fmi->vdev.v4l2_dev = v4l2_dev;343 fmi->vdev.fops = &fmi_fops;344 fmi->vdev.ioctl_ops = &fmi_ioctl_ops;345 fmi->vdev.release = video_device_release_empty;346 fmi->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;347 video_set_drvdata(&fmi->vdev, fmi);348 349 mutex_init(&fmi->lock);350 351 /* mute card and set default frequency */352 fmi->mute = true;353 fmi->curfreq = RSF16_MINFREQ;354 fmi_set_freq(fmi);355 356 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);360 if (pnp_attached)361 pnp_device_detach(dev);362 return -EINVAL;363 }364 365 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);366 return 0;367}368 369static void __exit fmi_exit(void)370{371 struct fmi *fmi = &fmi_card;372 373 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);379}380 381module_init(fmi_init);382module_exit(fmi_exit);383