diff options
Diffstat (limited to 'drivers/media/radio/radio-sf16fmi.c')
| -rw-r--r-- | drivers/media/radio/radio-sf16fmi.c | 382 |
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..1fb88c2b9 --- /dev/null +++ b/drivers/media/radio/radio-sf16fmi.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* 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@kernel.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) +{ + strscpy(v->driver, "radio-sf16fmi", sizeof(v->driver)); + strscpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card)); + strscpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info)); + 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; + + strscpy(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; + static const 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; + } + + strscpy(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; + } + + strscpy(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; + fmi->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; + 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); |