android_kernel_motorola_sm6225/drivers/media/radio/radio-maestro.c
Julia Lawall f37fdf3ff7 V4L/DVB (7036): radio: Use video_device_release rather than kfree
The file drivers/media/video/videodev.c defines both video_device_alloc and
video_device_release.  These are essentially just kzmalloc and kfree,
respectively, but it seems better to use video_device_release, as done in
the other media files, rather than kfree, in case the implementation some
day changes.

The problem was found using the following semantic match.
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
type T,T1,T2;
identifier E;
statement S;
expression x1,x2,x3;
int ret;
@@

  T E;
  ...
* E = video_device_alloc(...);
  if (E == NULL) S
  ... when != video_device_release(...,(T1)E,...)
      when != if (E != NULL) { ... video_device_release(...,(T1)E,...); ...}
      when != x1 = (T1)E
      when != E = x3;
      when any
  if (...) {
    ... when != video_device_release(...,(T2)E,...)
        when != if (E != NULL) { ... video_device_release(...,(T2)E,...); ...}
        when != x2 = (T2)E
(
*   return;
|
*   return ret;
)
  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-01-25 19:05:02 -02:00

461 lines
11 KiB
C

/* 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 <asm/io.h>
#include <asm/uaccess.h>
#include <linux/pci.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#define RADIO_VERSION KERNEL_VERSION(0,0,6)
#define DRIVER_VERSION "0.06"
static struct v4l2_queryctrl radio_qctrl[] = {
{
.id = V4L2_CID_AUDIO_MUTE,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.default_value = 1,
.type = V4L2_CTRL_TYPE_BOOLEAN,
}
};
#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)
static int radio_nr = -1;
module_param(radio_nr, int, 0);
static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void maestro_remove(struct pci_dev *pdev);
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 const struct file_operations maestro_fops = {
.owner = THIS_MODULE,
.open = video_exclusive_open,
.release = video_exclusive_release,
.ioctl = video_ioctl2,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
struct radio_device {
u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
muted, /* VIDEO_AUDIO_MUTE */
stereo, /* VIDEO_TUNER_STEREO_ON */
tuned; /* signal strength (0 or 0xffff) */
};
static u32 radio_bits_get(struct radio_device *dev)
{
register u16 io=dev->io, l, rdata;
register 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 radio_device *dev, u32 data)
{
register 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)
{
strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
strlcpy(v->card, "Maestro Radio", sizeof(v->card));
sprintf(v->bus_info, "PCI");
v->version = RADIO_VERSION;
v->capabilities = V4L2_CAP_TUNER;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card = video_get_drvdata(dev);
if (v->index > 0)
return -EINVAL;
(void)radio_bits_get(card);
strcpy(v->name, "FM");
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(card->stereo)
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal = card->tuned;
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
if (v->index > 0)
return -EINVAL;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card = video_get_drvdata(dev);
if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
return -EINVAL;
radio_bits_set(card, FREQ2BITS(f->frequency));
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card = video_get_drvdata(dev);
f->type = V4L2_TUNER_RADIO;
f->frequency = BITS2FREQ(radio_bits_get(card));
return 0;
}
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int i;
for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
if (qc->id && qc->id == radio_qctrl[i].id) {
memcpy(qc, &(radio_qctrl[i]),
sizeof(*qc));
return 0;
}
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card = video_get_drvdata(dev);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = card->muted;
return 0;
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card = video_get_drvdata(dev);
register u16 io = card->io;
register u16 omask = inw(io + IO_MASK);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
outw(~STR_WREN, io + IO_MASK);
outw((card->muted = ctrl->value ) ?
STR_WREN : 0, io);
udelay(4);
outw(omask, io + IO_MASK);
msleep(125);
return 0;
}
return -EINVAL;
}
static int vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index > 1)
return -EINVAL;
strcpy(a->name, "Radio");
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
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)
{
if (i != 0)
return -EINVAL;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index != 0)
return -EINVAL;
return 0;
}
static u16 __devinit radio_power_on(struct radio_device *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 struct video_device maestro_radio = {
.name = "Maestro radio",
.type = VID_TYPE_TUNER,
.fops = &maestro_fops,
.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 int __devinit maestro_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct radio_device *radio_unit;
struct video_device *maestro_radio_inst;
int retval;
retval = pci_enable_device(pdev);
if (retval) {
dev_err(&pdev->dev, "enabling pci device failed!\n");
goto err;
}
retval = -ENOMEM;
radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
if (radio_unit == NULL) {
dev_err(&pdev->dev, "not enough memory\n");
goto err;
}
radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
maestro_radio_inst = video_device_alloc();
if (maestro_radio_inst == NULL) {
dev_err(&pdev->dev, "not enough memory\n");
goto errfr;
}
memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
video_set_drvdata(maestro_radio_inst, radio_unit);
pci_set_drvdata(pdev, maestro_radio_inst);
retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO,
radio_nr);
if (retval) {
printk(KERN_ERR "can't register video device!\n");
goto errfr1;
}
if (!radio_power_on(radio_unit)) {
retval = -EIO;
goto errunr;
}
dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
__DATE__ "\n");
dev_info(&pdev->dev, "radio chip initialized\n");
return 0;
errunr:
video_unregister_device(maestro_radio_inst);
errfr1:
video_device_release(maestro_radio_inst);
errfr:
kfree(radio_unit);
err:
return retval;
}
static void __devexit maestro_remove(struct pci_dev *pdev)
{
struct video_device *vdev = pci_get_drvdata(pdev);
video_unregister_device(vdev);
}
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);
MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
MODULE_LICENSE("GPL");