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path: root/drivers/media/radio/radio-sf16fmi.c
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Diffstat (limited to 'drivers/media/radio/radio-sf16fmi.c')
-rw-r--r--drivers/media/radio/radio-sf16fmi.c382
1 files changed, 382 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c
new file mode 100644
index 000000000..28a89466c
--- /dev/null
+++ b/drivers/media/radio/radio-sf16fmi.c
@@ -0,0 +1,382 @@
+/* SF16-FMI, SF16-FMP and SF16-FMD radio driver for Linux radio support
+ * heavily based on rtrack driver...
+ * (c) 1997 M. Kirkwood
+ * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
+ *
+ * Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>
+ * Made working and cleaned up functions <mikael.hedin@irf.se>
+ * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
+ *
+ * Notes on the hardware
+ *
+ * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
+ * No volume control - only mute/unmute - you have to use line volume
+ * control on SB-part of SF16-FMI/SF16-FMP/SF16-FMD
+ *
+ * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
+ */
+
+#include <linux/kernel.h> /* __setup */
+#include <linux/module.h> /* Modules */
+#include <linux/init.h> /* Initdata */
+#include <linux/ioport.h> /* request_region */
+#include <linux/delay.h> /* udelay */
+#include <linux/isapnp.h>
+#include <linux/mutex.h>
+#include <linux/videodev2.h> /* kernel radio structs */
+#include <linux/io.h> /* outb, outb_p */
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include "lm7000.h"
+
+MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
+MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio.");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.3");
+
+static int io = -1;
+static int radio_nr = -1;
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)");
+module_param(radio_nr, int, 0);
+
+struct fmi
+{
+ struct v4l2_device v4l2_dev;
+ struct v4l2_ctrl_handler hdl;
+ struct video_device vdev;
+ int io;
+ bool mute;
+ u32 curfreq; /* freq in kHz */
+ struct mutex lock;
+};
+
+static struct fmi fmi_card;
+static struct pnp_dev *dev;
+static bool pnp_attached;
+
+#define RSF16_MINFREQ (87U * 16000)
+#define RSF16_MAXFREQ (108U * 16000)
+
+#define FMI_BIT_TUN_CE (1 << 0)
+#define FMI_BIT_TUN_CLK (1 << 1)
+#define FMI_BIT_TUN_DATA (1 << 2)
+#define FMI_BIT_VOL_SW (1 << 3)
+#define FMI_BIT_TUN_STRQ (1 << 4)
+
+static void fmi_set_pins(void *handle, u8 pins)
+{
+ struct fmi *fmi = handle;
+ u8 bits = FMI_BIT_TUN_STRQ;
+
+ if (!fmi->mute)
+ bits |= FMI_BIT_VOL_SW;
+
+ if (pins & LM7000_DATA)
+ bits |= FMI_BIT_TUN_DATA;
+ if (pins & LM7000_CLK)
+ bits |= FMI_BIT_TUN_CLK;
+ if (pins & LM7000_CE)
+ bits |= FMI_BIT_TUN_CE;
+
+ mutex_lock(&fmi->lock);
+ outb_p(bits, fmi->io);
+ mutex_unlock(&fmi->lock);
+}
+
+static inline void fmi_mute(struct fmi *fmi)
+{
+ mutex_lock(&fmi->lock);
+ outb(0x00, fmi->io);
+ mutex_unlock(&fmi->lock);
+}
+
+static inline void fmi_unmute(struct fmi *fmi)
+{
+ mutex_lock(&fmi->lock);
+ outb(0x08, fmi->io);
+ mutex_unlock(&fmi->lock);
+}
+
+static inline int fmi_getsigstr(struct fmi *fmi)
+{
+ int val;
+ int res;
+
+ mutex_lock(&fmi->lock);
+ val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */
+ outb(val, fmi->io);
+ outb(val | 0x10, fmi->io);
+ msleep(143); /* was schedule_timeout(HZ/7) */
+ res = (int)inb(fmi->io + 1);
+ outb(val, fmi->io);
+
+ mutex_unlock(&fmi->lock);
+ return (res & 2) ? 0 : 0xFFFF;
+}
+
+static void fmi_set_freq(struct fmi *fmi)
+{
+ fmi->curfreq = clamp(fmi->curfreq, RSF16_MINFREQ, RSF16_MAXFREQ);
+ /* rounding in steps of 800 to match the freq
+ that will be used */
+ lm7000_set_freq((fmi->curfreq / 800) * 800, fmi, fmi_set_pins);
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
+ strlcpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card));
+ strlcpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info));
+ v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+ v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ struct fmi *fmi = video_drvdata(file);
+
+ if (v->index > 0)
+ return -EINVAL;
+
+ strlcpy(v->name, "FM", sizeof(v->name));
+ v->type = V4L2_TUNER_RADIO;
+ v->rangelow = RSF16_MINFREQ;
+ v->rangehigh = RSF16_MAXFREQ;
+ v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
+ v->audmode = V4L2_TUNER_MODE_STEREO;
+ v->signal = fmi_getsigstr(fmi);
+ return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ const struct v4l2_tuner *v)
+{
+ return v->index ? -EINVAL : 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ const struct v4l2_frequency *f)
+{
+ struct fmi *fmi = video_drvdata(file);
+
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ fmi->curfreq = f->frequency;
+ fmi_set_freq(fmi);
+
+ return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct fmi *fmi = video_drvdata(file);
+
+ if (f->tuner != 0)
+ return -EINVAL;
+ f->type = V4L2_TUNER_RADIO;
+ f->frequency = fmi->curfreq;
+ return 0;
+}
+
+static int fmi_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ if (ctrl->val)
+ fmi_mute(fmi);
+ else
+ fmi_unmute(fmi);
+ fmi->mute = ctrl->val;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops fmi_ctrl_ops = {
+ .s_ctrl = fmi_s_ctrl,
+};
+
+static const struct v4l2_file_operations fmi_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = v4l2_ctrl_poll,
+ .unlocked_ioctl = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_g_tuner = vidioc_g_tuner,
+ .vidioc_s_tuner = vidioc_s_tuner,
+ .vidioc_g_frequency = vidioc_g_frequency,
+ .vidioc_s_frequency = vidioc_s_frequency,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/* ladis: this is my card. does any other types exist? */
+static struct isapnp_device_id id_table[] = {
+ /* SF16-FMI */
+ { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+ ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
+ /* SF16-FMD */
+ { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+ ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0},
+ { ISAPNP_CARD_END, },
+};
+
+MODULE_DEVICE_TABLE(isapnp, id_table);
+
+static int __init isapnp_fmi_probe(void)
+{
+ int i = 0;
+
+ while (id_table[i].card_vendor != 0 && dev == NULL) {
+ dev = pnp_find_dev(NULL, id_table[i].vendor,
+ id_table[i].function, NULL);
+ i++;
+ }
+
+ if (!dev)
+ return -ENODEV;
+ if (pnp_device_attach(dev) < 0)
+ return -EAGAIN;
+ if (pnp_activate_dev(dev) < 0) {
+ printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
+ pnp_device_detach(dev);
+ return -ENOMEM;
+ }
+ if (!pnp_port_valid(dev, 0)) {
+ pnp_device_detach(dev);
+ return -ENODEV;
+ }
+
+ i = pnp_port_start(dev, 0);
+ printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
+
+ return i;
+}
+
+static int __init fmi_init(void)
+{
+ struct fmi *fmi = &fmi_card;
+ struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
+ struct v4l2_ctrl_handler *hdl = &fmi->hdl;
+ int res, i;
+ int probe_ports[] = { 0, 0x284, 0x384 };
+
+ if (io < 0) {
+ for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
+ io = probe_ports[i];
+ if (io == 0) {
+ io = isapnp_fmi_probe();
+ if (io < 0)
+ continue;
+ pnp_attached = true;
+ }
+ if (!request_region(io, 2, "radio-sf16fmi")) {
+ if (pnp_attached)
+ pnp_device_detach(dev);
+ io = -1;
+ continue;
+ }
+ if (pnp_attached ||
+ ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
+ break;
+ release_region(io, 2);
+ io = -1;
+ }
+ } else {
+ if (!request_region(io, 2, "radio-sf16fmi")) {
+ printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
+ return -EBUSY;
+ }
+ if (inb(io) == 0xff) {
+ printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
+ release_region(io, 2);
+ return -ENODEV;
+ }
+ }
+ if (io < 0) {
+ printk(KERN_ERR "radio-sf16fmi: no cards found\n");
+ return -ENODEV;
+ }
+
+ strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
+ fmi->io = io;
+
+ res = v4l2_device_register(NULL, v4l2_dev);
+ if (res < 0) {
+ release_region(fmi->io, 2);
+ if (pnp_attached)
+ pnp_device_detach(dev);
+ v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+ return res;
+ }
+
+ v4l2_ctrl_handler_init(hdl, 1);
+ v4l2_ctrl_new_std(hdl, &fmi_ctrl_ops,
+ V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+ v4l2_dev->ctrl_handler = hdl;
+ if (hdl->error) {
+ res = hdl->error;
+ v4l2_err(v4l2_dev, "Could not register controls\n");
+ v4l2_ctrl_handler_free(hdl);
+ v4l2_device_unregister(v4l2_dev);
+ return res;
+ }
+
+ strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
+ fmi->vdev.v4l2_dev = v4l2_dev;
+ fmi->vdev.fops = &fmi_fops;
+ fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
+ fmi->vdev.release = video_device_release_empty;
+ video_set_drvdata(&fmi->vdev, fmi);
+
+ mutex_init(&fmi->lock);
+
+ /* mute card and set default frequency */
+ fmi->mute = true;
+ fmi->curfreq = RSF16_MINFREQ;
+ fmi_set_freq(fmi);
+
+ if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
+ v4l2_ctrl_handler_free(hdl);
+ v4l2_device_unregister(v4l2_dev);
+ release_region(fmi->io, 2);
+ if (pnp_attached)
+ pnp_device_detach(dev);
+ return -EINVAL;
+ }
+
+ v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
+ return 0;
+}
+
+static void __exit fmi_exit(void)
+{
+ struct fmi *fmi = &fmi_card;
+
+ v4l2_ctrl_handler_free(&fmi->hdl);
+ video_unregister_device(&fmi->vdev);
+ v4l2_device_unregister(&fmi->v4l2_dev);
+ release_region(fmi->io, 2);
+ if (dev && pnp_attached)
+ pnp_device_detach(dev);
+}
+
+module_init(fmi_init);
+module_exit(fmi_exit);
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