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[media] az6007: Simplify the read/write logic
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This patch introduces no functional changes. It basically defines
a macro for each different req found at the driver, and cleans the
code to use them, making easier to understand the code.

With regards to the IR handling code, although the original code
doesn't define what's the request, it is clear, from the USB logs,
that 0xc5 is for IR polling.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Mauro Carvalho Chehab committed Jan 21, 2012
1 parent 3af2f4f commit 3aecf2c
Showing 1 changed file with 87 additions and 98 deletions.
185 changes: 87 additions & 98 deletions drivers/media/dvb/dvb-usb/az6007.c
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,17 @@ MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,rc=4 (or-able))."

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

/* Known requests (Cypress FX2 firmware + az6007 "private" ones*/

#define FX2_OED 0xb5
#define AZ6007_READ_DATA 0xb7
#define AZ6007_I2C_RD 0xb9
#define AZ6007_POWER 0xbc
#define AZ6007_I2C_WR 0xbd
#define FX2_SCON1 0xc0
#define AZ6007_TS_THROUGH 0xc7
#define AZ6007_READ_IR 0xc5

struct az6007_device_state {
struct dvb_ca_en50221 ca;
struct mutex ca_mutex;
Expand Down Expand Up @@ -168,7 +179,7 @@ static int az6007_rc_query(struct dvb_usb_device *d, u32 * event, int *state)

/* remove the following return to enabled remote querying */

az6007_read(d->udev, READ_REMOTE_REQ, 0, 0, key, 10);
az6007_read(d->udev, AZ6007_READ_IR, 0, 0, key, 10);

deb_rc("remote query key: %x %d\n", key[1], key[1]);

Expand All @@ -187,127 +198,104 @@ static int az6007_rc_query(struct dvb_usb_device *d, u32 * event, int *state)
#endif
}

/*
#if 0
int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
{
u8 v = onoff;
return az6007_write(d->udev,0xBC,v,3,NULL,1);
return az6007_write(d->udev, AZ6007_POWER, v , 3, NULL, 1);
}
*/
#endif

static int az6007_read_mac_addr(struct dvb_usb_device *d, u8 mac[6])
{
az6007_read(d->udev, 0xb7, 6, 0, &mac[0], 6);
return 0;
}
int ret;
ret = az6007_read(d->udev, AZ6007_READ_DATA, 6, 0, mac, 6);

#define AZ6007_POWER 0xbc
#define FX2_SCON1 0xc0
#define AZ6007_TS_THROUGH 0xc7
if (ret > 0)
deb_info("%s: mac is %02x:%02x:%02x:%02x:%02x:%02x\n",
__func__, mac[0], mac[1], mac[2],
mac[3], mac[4], mac[5]);

return ret;
}

static int az6007_frontend_poweron(struct dvb_usb_adapter *adap)
{
struct dvb_usb_device *d = adap->dev;
int ret;
struct usb_device *udev = adap->dev->udev;

deb_info("az6007_frontend_poweron adap=%p adap->dev=%p\n",
adap, adap->dev);
deb_info("%s: adap=%p adap->dev=%p\n", __func__, adap, adap->dev);

az6007_write(d->udev, AZ6007_POWER /* 0xbc */, 0, 2, NULL, 0);
ret = az6007_write(udev, AZ6007_POWER, 0, 2, NULL, 0);
if (ret < 0)
goto error;
msleep(150);
az6007_write(d->udev, AZ6007_POWER /* 0xbc */, 1, 4, NULL, 0);
ret = az6007_write(udev, AZ6007_POWER, 1, 4, NULL, 0);
if (ret < 0)
goto error;
msleep(100);
az6007_write(d->udev, AZ6007_POWER /* 0xbc */, 1, 3, NULL, 0);
ret = az6007_write(udev, AZ6007_POWER, 1, 3, NULL, 0);
if (ret < 0)
goto error;
msleep(100);
az6007_write(d->udev, AZ6007_POWER /* 0xbc */, 1, 4, NULL, 0);
ret = az6007_write(udev, AZ6007_POWER, 1, 4, NULL, 0);
if (ret < 0)
goto error;
msleep(100);
az6007_write(d->udev, FX2_SCON1 /* 0xc0 */, 0, 3, NULL, 0);
ret = az6007_write(udev, FX2_SCON1, 0, 3, NULL, 0);
if (ret < 0)
goto error;
msleep (10);
az6007_write(d->udev, FX2_SCON1 /* 0xc0 */, 1, 3, NULL, 0);
ret = az6007_write(udev, FX2_SCON1, 1, 3, NULL, 0);
if (ret < 0)
goto error;
msleep (10);
az6007_write(d->udev, AZ6007_POWER /* 0xbc */, 0, 0, NULL, 0);
ret = az6007_write(udev, AZ6007_POWER, 0, 0, NULL, 0);

deb_info("az6007_frontend_poweron: OK\n");
error:
if (ret < 0)
err("%s failed with error %d", __func__, ret);

return 0;
return ret;
}

static int az6007_frontend_reset(struct dvb_usb_adapter *adap)
{
struct usb_device *udev = adap->dev->udev;
int ret;
u8 req;
u16 value;
u16 index;
int blen;

deb_info("az6007_frontend_reset adap=%p adap->dev=%p\n", adap, adap->dev);

/* reset demodulator */
req = 0xC0;
value = 1; /* high */
index = 3;
blen = 0;
ret = az6007_write(adap->dev->udev, req, value, index, NULL, blen);
if (ret != 0) {
err("az6007_frontend_reset failed 1 !!!");
return -EIO;
}
ret = az6007_write(udev, FX2_SCON1, 1, 3, NULL, 0);
if (ret < 0)
goto error;
msleep(200);
ret = az6007_write(udev, FX2_SCON1, 0, 3, NULL, 0);
if (ret < 0)
goto error;
msleep(200);
ret = az6007_write(udev, FX2_SCON1, 1, 3, NULL, 0);
if (ret < 0)
goto error;
msleep(200);

error:
if (ret < 0)
err("%s failed with error %d", __func__, ret);

req = 0xC0;
value = 0; /* low */
index = 3;
blen = 0;
msleep_interruptible(200);
ret = az6007_write(adap->dev->udev, req, value, index, NULL, blen);
if (ret != 0) {
err("az6007_frontend_reset failed 2 !!!");
return -EIO;
}
msleep_interruptible(200);
req = 0xC0;
value = 1; /* high */
index = 3;
blen = 0;

ret = az6007_write(adap->dev->udev, req, value, index, NULL, blen);
if (ret != 0) {
err("az6007_frontend_reset failed 3 !!!");
return -EIO;
}

msleep_interruptible(200);

deb_info("reset az6007 frontend\n");

return 0;
return ret;
}

static int az6007_led_on_off(struct usb_interface *intf, int onoff)
{
int ret = -1;
u8 req;
u16 value;
u16 index;
int blen;
/* TS through */
req = 0xBC;
value = onoff;
index = 0;
blen = 0;

ret = usb_control_msg(interface_to_usbdev(intf),
usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
req,
USB_TYPE_VENDOR | USB_DIR_OUT,
value, index, NULL, blen, 2000);

if (ret < 0) {
warn("usb in operation failed. (%d)", ret);
ret = -EIO;
} else
ret = 0;
struct usb_device *udev = interface_to_usbdev(intf);
int ret;

deb_xfer("in: req. %02x, val: %04x, ind: %04x, buffer: ", req, value,
index);
/* TS through */
ret = az6007_write(udev, AZ6007_POWER, onoff, 0, NULL, 0);
if (ret < 0)
err("%s failed with error %d", __func__, ret);

return ret;
}
Expand Down Expand Up @@ -377,7 +365,7 @@ int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)

info("Sending poweron sequence");

az6007_write(d->udev, AZ6007_TS_THROUGH /* 0xc7 */, 0, 0, NULL, 0);
az6007_write(d->udev, AZ6007_TS_THROUGH, 0, 0, NULL, 0);

#if 0
// Seems to be a poweroff sequence
Expand Down Expand Up @@ -429,7 +417,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
printk(KERN_DEBUG
"az6007 I2C xfer write+read addr=0x%x len=%d/%d: ",
addr, msgs[i].len, msgs[i + 1].len);
req = 0xb9;
req = AZ6007_I2C_RD;
index = msgs[i].buf[0];
value = addr | (1 << 8);
length = 6 + msgs[i + 1].len;
Expand All @@ -453,7 +441,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
printk(KERN_DEBUG
"az6007 I2C xfer write addr=0x%x len=%d: ",
addr, msgs[i].len);
req = 0xbd;
req = AZ6007_I2C_WR;
index = msgs[i].buf[0];
value = addr | (1 << 8);
length = msgs[i].len - 1;
Expand All @@ -473,7 +461,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
printk(KERN_DEBUG
"az6007 I2C xfer read addr=0x%x len=%d: ",
addr, msgs[i].len);
req = 0xb9;
req = AZ6007_I2C_RD;
index = msgs[i].buf[0];
value = addr;
length = msgs[i].len + 6;
Expand Down Expand Up @@ -516,16 +504,17 @@ int az6007_identify_state(struct usb_device *udev,
struct dvb_usb_device_properties *props,
struct dvb_usb_device_description **desc, int *cold)
{
u8 b[16];
s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0xb7, USB_TYPE_VENDOR | USB_DIR_IN, 6, 0, b,
6, USB_CTRL_GET_TIMEOUT);

deb_info("FW GET_VERSION length: %d\n", ret);
int ret;
u8 mac[6];

*cold = ret <= 0;
/* Try to read the mac address */
ret = az6007_read(udev, AZ6007_READ_DATA, 6, 0, mac, 6);
if (ret == 6)
*cold = 0;
else
*cold = 1;

deb_info("cold: %d\n", *cold);
deb_info("Device is on %s state\n", *cold? "warm" : "cold");
return 0;
}

Expand Down

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