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Subject: V4L/DVB: dib7770: enable the current mirror
Author:  Olivier Grenie <olivier.gre...@dibcom.fr>
Date:    Tue Sep 7 12:50:45 2010 -0300

To improve performance on DiB7770-devices enabling the current mirror
is needed.

This patch adds an option to the dib7000p-driver to do that and it
creates a separate device-entry in dib0700-device to use those changes
on hardware which is using the DiB7770.

Signed-off-by: Olivier Grenie <olivier.gre...@dibcom.fr>
Signed-off-by: Patrick Boettcher <patrick.boettc...@dibcom.fr>
Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com>

 drivers/media/dvb/dvb-usb/dib0700_devices.c |   53 ++++++++++++++++++++++++++-
 drivers/media/dvb/frontends/dib7000p.c      |    2 +
 drivers/media/dvb/frontends/dib7000p.h      |    3 ++
 3 files changed, 57 insertions(+), 1 deletions(-)

---

http://git.linuxtv.org/media-tree.git?a=commitdiff;h=f36e4913cfc12863804b0c200e037a61a9e2046a

diff --git a/drivers/media/dvb/dvb-usb/dib0700_devices.c 
b/drivers/media/dvb/dvb-usb/dib0700_devices.c
index ce66c5a..385ce1c 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_devices.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_devices.c
@@ -940,6 +940,57 @@ static int stk7070p_frontend_attach(struct dvb_usb_adapter 
*adap)
        return adap->fe == NULL ? -ENODEV : 0;
 }
 
+/* STK7770P */
+static struct dib7000p_config dib7770p_dib7000p_config = {
+       .output_mpeg2_in_188_bytes = 1,
+
+       .agc_config_count = 1,
+       .agc = &dib7070_agc_config,
+       .bw  = &dib7070_bw_config_12_mhz,
+       .tuner_is_baseband = 1,
+       .spur_protect = 1,
+
+       .gpio_dir = DIB7000P_GPIO_DEFAULT_DIRECTIONS,
+       .gpio_val = DIB7000P_GPIO_DEFAULT_VALUES,
+       .gpio_pwm_pos = DIB7000P_GPIO_DEFAULT_PWM_POS,
+
+       .hostbus_diversity = 1,
+       .enable_current_mirror = 1,
+};
+
+static int stk7770p_frontend_attach(struct dvb_usb_adapter *adap)
+{
+       struct usb_device_descriptor *p = &adap->dev->udev->descriptor;
+       if (p->idVendor  == cpu_to_le16(USB_VID_PINNACLE) &&
+           p->idProduct == cpu_to_le16(USB_PID_PINNACLE_PCTV72E))
+               dib0700_set_gpio(adap->dev, GPIO6, GPIO_OUT, 0);
+       else
+               dib0700_set_gpio(adap->dev, GPIO6, GPIO_OUT, 1);
+       msleep(10);
+       dib0700_set_gpio(adap->dev, GPIO9, GPIO_OUT, 1);
+       dib0700_set_gpio(adap->dev, GPIO4, GPIO_OUT, 1);
+       dib0700_set_gpio(adap->dev, GPIO7, GPIO_OUT, 1);
+       dib0700_set_gpio(adap->dev, GPIO10, GPIO_OUT, 0);
+
+       dib0700_ctrl_clock(adap->dev, 72, 1);
+
+       msleep(10);
+       dib0700_set_gpio(adap->dev, GPIO10, GPIO_OUT, 1);
+       msleep(10);
+       dib0700_set_gpio(adap->dev, GPIO0, GPIO_OUT, 1);
+
+       if (dib7000p_i2c_enumeration(&adap->dev->i2c_adap, 1, 18,
+                                    &dib7770p_dib7000p_config) != 0) {
+               err("%s: dib7000p_i2c_enumeration failed.  Cannot continue\n",
+                   __func__);
+               return -ENODEV;
+       }
+
+       adap->fe = dvb_attach(dib7000p_attach, &adap->dev->i2c_adap, 0x80,
+               &dib7770p_dib7000p_config);
+       return adap->fe == NULL ? -ENODEV : 0;
+}
+
 /* DIB807x generic */
 static struct dibx000_agc_config dib807x_agc_config[2] = {
        {
@@ -2406,7 +2457,7 @@ struct dvb_usb_device_properties dib0700_devices[] = {
                                .pid_filter_count = 32,
                                .pid_filter       = stk70x0p_pid_filter,
                                .pid_filter_ctrl  = stk70x0p_pid_filter_ctrl,
-                               .frontend_attach  = stk7070p_frontend_attach,
+                               .frontend_attach  = stk7770p_frontend_attach,
                                .tuner_attach     = dib7770p_tuner_attach,
 
                                DIB0700_DEFAULT_STREAMING_CONFIG(0x02),
diff --git a/drivers/media/dvb/frontends/dib7000p.c 
b/drivers/media/dvb/frontends/dib7000p.c
index 2e28b97..73f59ab 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -260,6 +260,8 @@ static void dib7000p_set_adc_state(struct dib7000p_state 
*state, enum dibx000_ad
 
 //     dprintk( "908: %x, 909: %x\n", reg_908, reg_909);
 
+       reg_908 |= (state->cfg.enable_current_mirror & 1) << 7;
+
        dib7000p_write_word(state, 908, reg_908);
        dib7000p_write_word(state, 909, reg_909);
 }
diff --git a/drivers/media/dvb/frontends/dib7000p.h 
b/drivers/media/dvb/frontends/dib7000p.h
index 805dd13..04a7449 100644
--- a/drivers/media/dvb/frontends/dib7000p.h
+++ b/drivers/media/dvb/frontends/dib7000p.h
@@ -33,6 +33,9 @@ struct dib7000p_config {
        int (*agc_control) (struct dvb_frontend *, u8 before);
 
        u8 output_mode;
+
+       u8 enable_current_mirror : 1;
+
 };
 
 #define DEFAULT_DIB7000P_I2C_ADDRESS 18

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