+++ /dev/null
-/* Maestro PCI sound card radio driver for Linux support
- * (c) 2000 A. Tlalka, atlka@pg.gda.pl
- * Notes on the hardware
- *
- * + Frequency control is done digitally
- * + No volume control - only mute/unmute - you have to use Aux line volume
- * control on Maestro card to set the volume
- * + Radio status (tuned/not_tuned and stereo/mono) is valid some time after
- * frequency setting (>100ms) and only when the radio is unmuted.
- * version 0.02
- * + io port is automatically detected - only the first radio is used
- * version 0.03
- * + thread access locking additions
- * version 0.04
- * + code improvements
- * + VIDEO_TUNER_LOW is permanent
- *
- * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/version.h> /* for KERNEL_VERSION MACRO */
-#include <linux/pci.h>
-#include <linux/videodev2.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-ioctl.h>
-
-MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
-MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
-MODULE_LICENSE("GPL");
-
-static int radio_nr = -1;
-module_param(radio_nr, int, 0);
-
-#define RADIO_VERSION KERNEL_VERSION(0, 0, 6)
-#define DRIVER_VERSION "0.06"
-
-#define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
-
-#define IO_MASK 4 /* mask register offset from GPIO_DATA
- bits 1=unmask write to given bit */
-#define IO_DIR 8 /* direction register offset from GPIO_DATA
- bits 0/1=read/write direction */
-
-#define GPIO6 0x0040 /* mask bits for GPIO lines */
-#define GPIO7 0x0080
-#define GPIO8 0x0100
-#define GPIO9 0x0200
-
-#define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
-#define STR_CLK GPIO7
-#define STR_WREN GPIO8
-#define STR_MOST GPIO9
-
-#define FREQ_LO 50*16000
-#define FREQ_HI 150*16000
-
-#define FREQ_IF 171200 /* 10.7*16000 */
-#define FREQ_STEP 200 /* 12.5*16 */
-
-#define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
- /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
-
-#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
-
-struct maestro {
- struct v4l2_device v4l2_dev;
- struct video_device vdev;
- struct pci_dev *pdev;
- struct mutex lock;
-
- u16 io; /* base of Maestro card radio io (GPIO_DATA)*/
- u16 muted; /* VIDEO_AUDIO_MUTE */
- u16 stereo; /* VIDEO_TUNER_STEREO_ON */
- u16 tuned; /* signal strength (0 or 0xffff) */
-};
-
-static inline struct maestro *to_maestro(struct v4l2_device *v4l2_dev)
-{
- return container_of(v4l2_dev, struct maestro, v4l2_dev);
-}
-
-static u32 radio_bits_get(struct maestro *dev)
-{
- u16 io = dev->io, l, rdata;
- u32 data = 0;
- u16 omask;
-
- omask = inw(io + IO_MASK);
- outw(~(STR_CLK | STR_WREN), io + IO_MASK);
- outw(0, io);
- udelay(16);
-
- for (l = 24; l--;) {
- outw(STR_CLK, io); /* HI state */
- udelay(2);
- if (!l)
- dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
- outw(0, io); /* LO state */
- udelay(2);
- data <<= 1; /* shift data */
- rdata = inw(io);
- if (!l)
- dev->stereo = (rdata & STR_MOST) ? 0 : 1;
- else if (rdata & STR_DATA)
- data++;
- udelay(2);
- }
-
- if (dev->muted)
- outw(STR_WREN, io);
-
- udelay(4);
- outw(omask, io + IO_MASK);
-
- return data & 0x3ffe;
-}
-
-static void radio_bits_set(struct maestro *dev, u32 data)
-{
- u16 io = dev->io, l, bits;
- u16 omask, odir;
-
- omask = inw(io + IO_MASK);
- odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
- outw(odir | STR_DATA, io + IO_DIR);
- outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
- udelay(16);
- for (l = 25; l; l--) {
- bits = ((data >> 18) & STR_DATA) | STR_WREN;
- data <<= 1; /* shift data */
- outw(bits, io); /* start strobe */
- udelay(2);
- outw(bits | STR_CLK, io); /* HI level */
- udelay(2);
- outw(bits, io); /* LO level */
- udelay(4);
- }
-
- if (!dev->muted)
- outw(0, io);
-
- udelay(4);
- outw(omask, io + IO_MASK);
- outw(odir, io + IO_DIR);
- msleep(125);
-}
-
-static int vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *v)
-{
- struct maestro *dev = video_drvdata(file);
-
- strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
- strlcpy(v->card, "Maestro Radio", sizeof(v->card));
- snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
- v->version = RADIO_VERSION;
- v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
- return 0;
-}
-
-static int vidioc_g_tuner(struct file *file, void *priv,
- struct v4l2_tuner *v)
-{
- struct maestro *dev = video_drvdata(file);
-
- if (v->index > 0)
- return -EINVAL;
-
- mutex_lock(&dev->lock);
- radio_bits_get(dev);
-
- strlcpy(v->name, "FM", sizeof(v->name));
- v->type = V4L2_TUNER_RADIO;
- v->rangelow = FREQ_LO;
- v->rangehigh = FREQ_HI;
- v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
- v->capability = V4L2_TUNER_CAP_LOW;
- if (dev->stereo)
- v->audmode = V4L2_TUNER_MODE_STEREO;
- else
- v->audmode = V4L2_TUNER_MODE_MONO;
- v->signal = dev->tuned;
- mutex_unlock(&dev->lock);
- return 0;
-}
-
-static int vidioc_s_tuner(struct file *file, void *priv,
- struct v4l2_tuner *v)
-{
- return v->index ? -EINVAL : 0;
-}
-
-static int vidioc_s_frequency(struct file *file, void *priv,
- struct v4l2_frequency *f)
-{
- struct maestro *dev = video_drvdata(file);
-
- if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
- return -EINVAL;
- if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
- return -EINVAL;
- mutex_lock(&dev->lock);
- radio_bits_set(dev, FREQ2BITS(f->frequency));
- mutex_unlock(&dev->lock);
- return 0;
-}
-
-static int vidioc_g_frequency(struct file *file, void *priv,
- struct v4l2_frequency *f)
-{
- struct maestro *dev = video_drvdata(file);
-
- if (f->tuner != 0)
- return -EINVAL;
- f->type = V4L2_TUNER_RADIO;
- mutex_lock(&dev->lock);
- f->frequency = BITS2FREQ(radio_bits_get(dev));
- mutex_unlock(&dev->lock);
- return 0;
-}
-
-static int vidioc_queryctrl(struct file *file, void *priv,
- struct v4l2_queryctrl *qc)
-{
- switch (qc->id) {
- case V4L2_CID_AUDIO_MUTE:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
- }
- return -EINVAL;
-}
-
-static int vidioc_g_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct maestro *dev = video_drvdata(file);
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- ctrl->value = dev->muted;
- return 0;
- }
- return -EINVAL;
-}
-
-static int vidioc_s_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct maestro *dev = video_drvdata(file);
- u16 io = dev->io;
- u16 omask;
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- mutex_lock(&dev->lock);
- omask = inw(io + IO_MASK);
- outw(~STR_WREN, io + IO_MASK);
- dev->muted = ctrl->value;
- outw(dev->muted ? STR_WREN : 0, io);
- udelay(4);
- outw(omask, io + IO_MASK);
- msleep(125);
- mutex_unlock(&dev->lock);
- return 0;
- }
- return -EINVAL;
-}
-
-static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
-{
- *i = 0;
- return 0;
-}
-
-static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
-{
- return i ? -EINVAL : 0;
-}
-
-static int vidioc_g_audio(struct file *file, void *priv,
- struct v4l2_audio *a)
-{
- a->index = 0;
- strlcpy(a->name, "Radio", sizeof(a->name));
- a->capability = V4L2_AUDCAP_STEREO;
- return 0;
-}
-
-static int vidioc_s_audio(struct file *file, void *priv,
- struct v4l2_audio *a)
-{
- return a->index ? -EINVAL : 0;
-}
-
-static const struct v4l2_file_operations maestro_fops = {
- .owner = THIS_MODULE,
- .unlocked_ioctl = video_ioctl2,
-};
-
-static const struct v4l2_ioctl_ops maestro_ioctl_ops = {
- .vidioc_querycap = vidioc_querycap,
- .vidioc_g_tuner = vidioc_g_tuner,
- .vidioc_s_tuner = vidioc_s_tuner,
- .vidioc_g_audio = vidioc_g_audio,
- .vidioc_s_audio = vidioc_s_audio,
- .vidioc_g_input = vidioc_g_input,
- .vidioc_s_input = vidioc_s_input,
- .vidioc_g_frequency = vidioc_g_frequency,
- .vidioc_s_frequency = vidioc_s_frequency,
- .vidioc_queryctrl = vidioc_queryctrl,
- .vidioc_g_ctrl = vidioc_g_ctrl,
- .vidioc_s_ctrl = vidioc_s_ctrl,
-};
-
-static u16 __devinit radio_power_on(struct maestro *dev)
-{
- register u16 io = dev->io;
- register u32 ofreq;
- u16 omask, odir;
-
- omask = inw(io + IO_MASK);
- odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
- outw(odir & ~STR_WREN, io + IO_DIR);
- dev->muted = inw(io) & STR_WREN ? 0 : 1;
- outw(odir, io + IO_DIR);
- outw(~(STR_WREN | STR_CLK), io + IO_MASK);
- outw(dev->muted ? 0 : STR_WREN, io);
- udelay(16);
- outw(omask, io + IO_MASK);
- ofreq = radio_bits_get(dev);
-
- if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
- ofreq = FREQ2BITS(FREQ_LO);
- radio_bits_set(dev, ofreq);
-
- return (ofreq == radio_bits_get(dev));
-}
-
-static int __devinit maestro_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- struct maestro *dev;
- struct v4l2_device *v4l2_dev;
- int retval;
-
- retval = pci_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "enabling pci device failed!\n");
- goto err;
- }
-
- retval = -ENOMEM;
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (dev == NULL) {
- dev_err(&pdev->dev, "not enough memory\n");
- goto err;
- }
-
- v4l2_dev = &dev->v4l2_dev;
- mutex_init(&dev->lock);
- dev->pdev = pdev;
-
- strlcpy(v4l2_dev->name, "maestro", sizeof(v4l2_dev->name));
-
- retval = v4l2_device_register(&pdev->dev, v4l2_dev);
- if (retval < 0) {
- v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
- goto errfr;
- }
-
- dev->io = pci_resource_start(pdev, 0) + GPIO_DATA;
-
- strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
- dev->vdev.v4l2_dev = v4l2_dev;
- dev->vdev.fops = &maestro_fops;
- dev->vdev.ioctl_ops = &maestro_ioctl_ops;
- dev->vdev.release = video_device_release_empty;
- video_set_drvdata(&dev->vdev, dev);
-
- if (!radio_power_on(dev)) {
- retval = -EIO;
- goto errfr1;
- }
-
- retval = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr);
- if (retval) {
- v4l2_err(v4l2_dev, "can't register video device!\n");
- goto errfr1;
- }
-
- v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n");
-
- return 0;
-errfr1:
- v4l2_device_unregister(v4l2_dev);
-errfr:
- kfree(dev);
-err:
- return retval;
-
-}
-
-static void __devexit maestro_remove(struct pci_dev *pdev)
-{
- struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
- struct maestro *dev = to_maestro(v4l2_dev);
-
- video_unregister_device(&dev->vdev);
- v4l2_device_unregister(&dev->v4l2_dev);
-}
-
-static struct pci_device_id maestro_r_pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
- .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
- .class_mask = 0xffff00 },
- { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
- .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
- .class_mask = 0xffff00 },
- { 0 }
-};
-MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
-
-static struct pci_driver maestro_r_driver = {
- .name = "maestro_radio",
- .id_table = maestro_r_pci_tbl,
- .probe = maestro_probe,
- .remove = __devexit_p(maestro_remove),
-};
-
-static int __init maestro_radio_init(void)
-{
- int retval = pci_register_driver(&maestro_r_driver);
-
- if (retval)
- printk(KERN_ERR "error during registration pci driver\n");
-
- return retval;
-}
-
-static void __exit maestro_radio_exit(void)
-{
- pci_unregister_driver(&maestro_r_driver);
-}
-
-module_init(maestro_radio_init);
-module_exit(maestro_radio_exit);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff