mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-11-01 17:08:10 +00:00
Code Issues Releases Wiki Activity

[media] rtl2832_sdr: convert to platform driver

Browse source 
That SDR driver module was abusing DVB frontend SEC (satellite
equipment controller) device and due to that it was also using
legacy DVB binding. Platform bus is pseudo-bus provided by kernel
driver model and it fits cases like that, where any other busses
are not suitable.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2014-12-16 10:09:20 -03:00 committed by Mauro Carvalho Chehab
parent 725b7f3046
commit 63bdab5d31
2 changed files with 156 additions and 241 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

355
drivers/media/dvb-frontends/rtl2832_sdr.c
View file

@ -32,6 +32,7 @@
#include <media/v4l2-event.h>
#include <media/videobuf2-vmalloc.h>
#include <linux/platform_device.h>
#include <linux/jiffies.h>
#include <linux/math64.h>
@ -112,7 +113,7 @@ struct rtl2832_sdr_dev {
#define URB_BUF (1 << 2)
unsigned long flags;
const struct rtl2832_config *cfg;
struct platform_device *pdev;
struct dvb_frontend *fe;
struct dvb_usb_device *d;
struct i2c_adapter *i2c;
@ -160,110 +161,29 @@ struct rtl2832_sdr_dev {
unsigned long jiffies_next;
};
/* write multiple hardware registers */
static int rtl2832_sdr_wr(struct rtl2832_sdr_dev *dev, u8 reg, const u8 *val,
int len)
{
int ret;
#define MAX_WR_LEN 24
#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
u8 buf[MAX_WR_XFER_LEN];
struct i2c_msg msg[1] = {
{
.addr = dev->cfg->i2c_addr,
.flags = 0,
.len = 1 + len,
.buf = buf,
}
};
if (WARN_ON(len > MAX_WR_LEN))
return -EINVAL;
buf[0] = reg;
memcpy(&buf[1], val, len);
ret = i2c_transfer(dev->i2c, msg, 1);
if (ret == 1) {
ret = 0;
} else {
dev_err(&dev->i2c->dev,
"%s: I2C wr failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* read multiple hardware registers */
static int rtl2832_sdr_rd(struct rtl2832_sdr_dev *dev, u8 reg, u8 *val, int len)
{
int ret;
struct i2c_msg msg[2] = {
{
.addr = dev->cfg->i2c_addr,
.flags = 0,
.len = 1,
.buf = &reg,
}, {
.addr = dev->cfg->i2c_addr,
.flags = I2C_M_RD,
.len = len,
.buf = val,
}
};
ret = i2c_transfer(dev->i2c, msg, 2);
if (ret == 2) {
ret = 0;
} else {
dev_err(&dev->i2c->dev,
"%s: I2C rd failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* write multiple registers */
static int rtl2832_sdr_wr_regs(struct rtl2832_sdr_dev *dev, u16 reg,
const u8 *val, int len)
{
int ret;
u8 reg2 = (reg >> 0) & 0xff;
u8 bank = (reg >> 8) & 0xff;
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct i2c_client *client = pdata->i2c_client;
/* switch bank if needed */
if (bank != dev->bank) {
ret = rtl2832_sdr_wr(dev, 0x00, &bank, 1);
if (ret)
return ret;
dev->bank = bank;
}
return rtl2832_sdr_wr(dev, reg2, val, len);
return pdata->bulk_write(client, reg, val, len);
}
#if 0
/* read multiple registers */
static int rtl2832_sdr_rd_regs(struct rtl2832_sdr_dev *dev, u16 reg, u8 *val,
int len)
{
int ret;
u8 reg2 = (reg >> 0) & 0xff;
u8 bank = (reg >> 8) & 0xff;
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct i2c_client *client = pdata->i2c_client;
/* switch bank if needed */
if (bank != dev->bank) {
ret = rtl2832_sdr_wr(dev, 0x00, &bank, 1);
if (ret)
return ret;
dev->bank = bank;
}
return rtl2832_sdr_rd(dev, reg2, val, len);
return pdata->bulk_read(client, reg, val, len);
}
#endif
/* write single register */
static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_dev *dev, u16 reg, u8 val)
@ -271,60 +191,17 @@ static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_dev *dev, u16 reg, u8 val)
return rtl2832_sdr_wr_regs(dev, reg, &val, 1);
}
#if 0
/* read single register */
static int rtl2832_sdr_rd_reg(struct rtl2832_sdr_dev *dev, u16 reg, u8 *val)
{
return rtl2832_sdr_rd_regs(dev, reg, val, 1);
}
#endif
/* write single register with mask */
static int rtl2832_sdr_wr_reg_mask(struct rtl2832_sdr_dev *dev, u16 reg,
u8 val, u8 mask)
{
int ret;
u8 tmp;
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct i2c_client *client = pdata->i2c_client;
/* no need for read if whole reg is written */
if (mask != 0xff) {
ret = rtl2832_sdr_rd_regs(dev, reg, &tmp, 1);
if (ret)
return ret;
val &= mask;
tmp &= ~mask;
val |= tmp;
}
return rtl2832_sdr_wr_regs(dev, reg, &val, 1);
return pdata->update_bits(client, reg, mask, val);
}
#if 0
/* read single register with mask */
static int rtl2832_sdr_rd_reg_mask(struct rtl2832_sdr_dev *dev, u16 reg,
u8 *val, u8 mask)
{
int ret, i;
u8 tmp;
ret = rtl2832_sdr_rd_regs(dev, reg, &tmp, 1);
if (ret)
return ret;
tmp &= mask;
/* find position of the first bit */
for (i = 0; i < 8; i++) {
if ((mask >> i) & 0x01)
break;
}
*val = tmp >> i;
return 0;
}
#endif
/* Private functions */
static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
struct rtl2832_sdr_dev *dev)
@ -584,28 +461,6 @@ static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
}
/* The user yanked out the cable... */
static void rtl2832_sdr_release_sec(struct dvb_frontend *fe)
{
struct rtl2832_sdr_dev *dev = fe->sec_priv;
dev_dbg(&dev->udev->dev, "\n");
mutex_lock(&dev->vb_queue_lock);
mutex_lock(&dev->v4l2_lock);
/* No need to keep the urbs around after disconnection */
dev->udev = NULL;
v4l2_device_disconnect(&dev->v4l2_dev);
video_unregister_device(&dev->vdev);
mutex_unlock(&dev->v4l2_lock);
mutex_unlock(&dev->vb_queue_lock);
v4l2_device_put(&dev->v4l2_dev);
fe->sec_priv = NULL;
}
static int rtl2832_sdr_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
@ -672,6 +527,8 @@ static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_frontend *fe = dev->fe;
int ret;
unsigned int f_sr, f_if;
@ -707,9 +564,9 @@ static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
goto err;
/* program IF */
u64tmp = f_if % dev->cfg->xtal;
u64tmp = f_if % pdata->clk;
u64tmp *= 0x400000;
u64tmp = div_u64(u64tmp, dev->cfg->xtal);
u64tmp = div_u64(u64tmp, pdata->clk);
u64tmp = -u64tmp;
u32tmp = u64tmp & 0x3fffff;
@ -746,7 +603,7 @@ static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
goto err;
/* program sampling rate (resampling down) */
u32tmp = div_u64(dev->cfg->xtal * 0x400000ULL, f_sr * 4U);
u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
u32tmp <<= 2;
buf[0] = (u32tmp >> 24) & 0xff;
buf[1] = (u32tmp >> 16) & 0xff;
@ -787,8 +644,8 @@ static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
goto err;
/* used RF tuner based settings */
switch (dev->cfg->tuner) {
case RTL2832_TUNER_E4000:
switch (pdata->tuner) {
case RTL2832_SDR_TUNER_E4000:
ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
@ -824,8 +681,8 @@ static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x85", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x013, "\x02", 1);
break;
case RTL2832_TUNER_FC0012:
case RTL2832_TUNER_FC0013:
case RTL2832_SDR_TUNER_FC0012:
case RTL2832_SDR_TUNER_FC0013:
ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
@ -856,7 +713,8 @@ static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
break;
case RTL2832_TUNER_R820T:
case RTL2832_SDR_TUNER_R820T:
case RTL2832_SDR_TUNER_R828D:
ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x01", 1);
@ -1401,34 +1259,46 @@ static void rtl2832_sdr_video_release(struct v4l2_device *v)
{
struct rtl2832_sdr_dev *dev =
container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
struct platform_device *pdev = dev->pdev;
dev_dbg(&pdev->dev, "\n");
v4l2_ctrl_handler_free(&dev->hdl);
v4l2_device_unregister(&dev->v4l2_dev);
kfree(dev);
}
struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, const struct rtl2832_config *cfg,
struct v4l2_subdev *sd)
/* Platform driver interface */
static int rtl2832_sdr_probe(struct platform_device *pdev)
{
int ret;
struct rtl2832_sdr_dev *dev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
struct dvb_usb_device *d = i2c_get_adapdata(i2c);
struct v4l2_subdev *subdev;
int ret;
dev = kzalloc(sizeof(struct rtl2832_sdr_dev), GFP_KERNEL);
dev_dbg(&pdev->dev, "\n");
if (!pdata) {
dev_err(&pdev->dev, "Cannot proceed without platform data\n");
ret = -EINVAL;
goto err;
}
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
dev_err(&d->udev->dev,
"Could not allocate memory for rtl2832_sdr_dev\n");
return NULL;
dev_err(&pdev->dev,
"Could not allocate memory for rtl2832_sdr_dev\n");
ret = -ENOMEM;
goto err;
}
/* setup the state */
dev->fe = fe;
dev->d = d;
dev->udev = d->udev;
dev->i2c = i2c;
dev->cfg = cfg;
subdev = pdata->v4l2_subdev;
dev->pdev = pdev;
dev->fe = pdata->dvb_frontend;
dev->d = pdata->dvb_usb_device;
dev->udev = pdata->dvb_usb_device->udev;
dev->i2c = pdata->i2c_client->adapter;
dev->f_adc = bands_adc[0].rangelow;
dev->f_tuner = bands_fm[0].rangelow;
dev->pixelformat = formats[0].pixelformat;
@ -1452,50 +1322,49 @@ struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
ret = vb2_queue_init(&dev->vb_queue);
if (ret) {
dev_err(&dev->udev->dev, "Could not initialize vb2 queue\n");
goto err_free_mem;
dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
goto err_kfree;
}
/* Register controls */
switch (dev->cfg->tuner) {
case RTL2832_TUNER_E4000:
switch (pdata->tuner) {
case RTL2832_SDR_TUNER_E4000:
v4l2_ctrl_handler_init(&dev->hdl, 9);
if (sd)
v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL);
if (subdev)
v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler, NULL);
break;
case RTL2832_TUNER_R820T:
case RTL2832_SDR_TUNER_R820T:
case RTL2832_SDR_TUNER_R828D:
v4l2_ctrl_handler_init(&dev->hdl, 2);
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH,
0, 8000000, 100000, 0);
V4L2_CID_RF_TUNER_BANDWIDTH,
0, 8000000, 100000, 0);
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
break;
case RTL2832_TUNER_FC0012:
case RTL2832_TUNER_FC0013:
case RTL2832_SDR_TUNER_FC0012:
case RTL2832_SDR_TUNER_FC0013:
v4l2_ctrl_handler_init(&dev->hdl, 2);
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH,
6000000, 8000000, 1000000,
6000000);
V4L2_CID_RF_TUNER_BANDWIDTH,
6000000, 8000000, 1000000,
6000000);
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
break;
default:
v4l2_ctrl_handler_init(&dev->hdl, 0);
dev_notice(&dev->udev->dev, "%s: Unsupported tuner\n",
KBUILD_MODNAME);
goto err_free_controls;
dev_err(&pdev->dev, "Unsupported tuner\n");
goto err_v4l2_ctrl_handler_free;
}
if (dev->hdl.error) {
ret = dev->hdl.error;
dev_err(&dev->udev->dev, "Could not initialize controls\n");
goto err_free_controls;
dev_err(&pdev->dev, "Could not initialize controls\n");
goto err_v4l2_ctrl_handler_free;
}
/* Init video_device structure */
@ -1508,9 +1377,8 @@ struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
dev->v4l2_dev.release = rtl2832_sdr_video_release;
ret = v4l2_device_register(&dev->udev->dev, &dev->v4l2_dev);
if (ret) {
dev_err(&dev->udev->dev,
"Failed to register v4l2-device (%d)\n", ret);
goto err_free_controls;
dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
goto err_v4l2_ctrl_handler_free;
}
dev->v4l2_dev.ctrl_handler = &dev->hdl;
@ -1520,33 +1388,56 @@ struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
if (ret) {
dev_err(&dev->udev->dev,
"Failed to register as video device (%d)\n",
ret);
goto err_unregister_v4l2_dev;
dev_err(&pdev->dev, "Failed to register as video device %d\n",
ret);
goto err_v4l2_device_unregister;
}
dev_info(&dev->udev->dev, "Registered as %s\n",
video_device_node_name(&dev->vdev));
fe->sec_priv = dev;
fe->ops.release_sec = rtl2832_sdr_release_sec;
dev_info(&dev->i2c->dev, "%s: Realtek RTL2832 SDR attached\n",
KBUILD_MODNAME);
dev_notice(&dev->udev->dev,
"%s: SDR API is still slightly experimental and functionality changes may follow\n",
KBUILD_MODNAME);
return fe;
err_unregister_v4l2_dev:
dev_info(&pdev->dev, "Registered as %s\n",
video_device_node_name(&dev->vdev));
dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
dev_notice(&pdev->dev,
"SDR API is still slightly experimental and functionality changes may follow\n");
platform_set_drvdata(pdev, dev);
return 0;
err_v4l2_device_unregister:
v4l2_device_unregister(&dev->v4l2_dev);
err_free_controls:
err_v4l2_ctrl_handler_free:
v4l2_ctrl_handler_free(&dev->hdl);
err_free_mem:
err_kfree:
kfree(dev);
return NULL;
err:
return ret;
}
EXPORT_SYMBOL(rtl2832_sdr_attach);
static int rtl2832_sdr_remove(struct platform_device *pdev)
{
struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
dev_dbg(&pdev->dev, "\n");
mutex_lock(&dev->vb_queue_lock);
mutex_lock(&dev->v4l2_lock);
/* No need to keep the urbs around after disconnection */
dev->udev = NULL;
v4l2_device_disconnect(&dev->v4l2_dev);
video_unregister_device(&dev->vdev);
mutex_unlock(&dev->v4l2_lock);
mutex_unlock(&dev->vb_queue_lock);
v4l2_device_put(&dev->v4l2_dev);
return 0;
}
static struct platform_driver rtl2832_sdr_driver = {
.driver = {
.name = "rtl2832_sdr",
.owner = THIS_MODULE,
},
.probe = rtl2832_sdr_probe,
.remove = rtl2832_sdr_remove,
};
module_platform_driver(rtl2832_sdr_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");

42
drivers/media/dvb-frontends/rtl2832_sdr.h
View file

@ -32,23 +32,47 @@
#define RTL2832_SDR_H
#include <linux/kconfig.h>
#include <linux/i2c.h>
#include <media/v4l2-subdev.h>
/* for config struct */
#include "dvb_frontend.h"
#include "rtl2832.h"
#if IS_ENABLED(CONFIG_DVB_RTL2832_SDR)
extern struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, const struct rtl2832_config *cfg,
struct v4l2_subdev *sd);
#else
struct rtl2832_sdr_platform_data {
/*
* Clock frequency.
* Hz
* 4000000, 16000000, 25000000, 28800000
*/
u32 clk;
/*
* Tuner.
* XXX: This list must be kept sync with dvb_usb_rtl28xxu USB IF driver.
*/
#define RTL2832_SDR_TUNER_TUA9001 0x24
#define RTL2832_SDR_TUNER_FC0012 0x26
#define RTL2832_SDR_TUNER_E4000 0x27
#define RTL2832_SDR_TUNER_FC0013 0x29
#define RTL2832_SDR_TUNER_R820T 0x2a
#define RTL2832_SDR_TUNER_R828D 0x2b
u8 tuner;
struct i2c_client *i2c_client;
int (*bulk_read)(struct i2c_client *, unsigned int, void *, size_t);
int (*bulk_write)(struct i2c_client *, unsigned int, const void *, size_t);
int (*update_bits)(struct i2c_client *, unsigned int, unsigned int, unsigned int);
struct dvb_frontend *dvb_frontend;
struct v4l2_subdev *v4l2_subdev;
struct dvb_usb_device *dvb_usb_device;
};
static inline struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, const struct rtl2832_config *cfg,
struct v4l2_subdev *sd)
{
dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
dev_warn(&i2c->dev, "%s: driver disabled!\n", __func__);
return NULL;
}
#endif
#endif /* RTL2832_SDR_H */