Hello,
In hardware design, the CI host controller is wired with GPIO_0 of CX23885.
The GPIO_0 can be configed as the interrupt source.
Interrupt mode in PCIe driver is more faster than poll mode to detect CAM insert/remove operations etc.
>Add CI support for DVBSky T980C.
>
>I used the new host device independent CIMaX SP2 I2C driver to implement it.
>
>cx23885_sp2_ci_ctrl function is borrowed entirely from cimax2.c.
>
>Signed-off-by: Olli Salonen <olli.salonen@xxxxxx>
>---
> drivers/media/pci/cx23885/cx23885-dvb.c | 105 +++++++++++++++++++++++++++++++-
> 1 file changed, 103 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/media/pci/cx23885/cx23885-dvb.c b/drivers/media/pci/cx23885/cx23885-dvb.c
>index cc88997..70dbcd6 100644
>--- a/drivers/media/pci/cx23885/cx23885-dvb.c
>+++ b/drivers/media/pci/cx23885/cx23885-dvb.c
>@@ -71,6 +71,7 @@
> #include "si2165.h"
> #include "si2168.h"
> #include "si2157.h"
>+#include "sp2.h"
> #include "m88ds3103.h"
> #include "m88ts2022.h"
>
>@@ -616,6 +617,76 @@ static int dvbsky_t9580_set_voltage(struct dvb_frontend *fe,
> return 0;
> }
>
>+static int cx23885_sp2_ci_ctrl(void *priv, u8 read, int addr,
>+ u8 data, int *mem)
>+{
>+
>+ /* MC417 */
>+ #define SP2_DATA 0x000000ff
>+ #define SP2_WR 0x00008000
>+ #define SP2_RD 0x00004000
>+ #define SP2_ACK 0x00001000
>+ #define SP2_ADHI 0x00000800
>+ #define SP2_ADLO 0x00000400
>+ #define SP2_CS1 0x00000200
>+ #define SP2_CS0 0x00000100
>+ #define SP2_EN_ALL 0x00001000
>+ #define SP2_CTRL_OFF (SP2_CS1 | SP2_CS0 | SP2_WR | SP2_RD)
>+
>+ struct cx23885_tsport *port = priv;
>+ struct cx23885_dev *dev = port->dev;
>+ int ret;
>+ int tmp;
>+ unsigned long timeout;
>+
>+ mutex_lock(&dev->gpio_lock);
>+
>+ /* write addr */
>+ cx_write(MC417_OEN, SP2_EN_ALL);
>+ cx_write(MC417_RWD, SP2_CTRL_OFF |
>+ SP2_ADLO | (0xff & addr));
>+ cx_clear(MC417_RWD, SP2_ADLO);
>+ cx_write(MC417_RWD, SP2_CTRL_OFF |
>+ SP2_ADHI | (0xff & (addr >> 8)));
>+ cx_clear(MC417_RWD, SP2_ADHI);
>+
>+ if (read) { /* data in */
>+ cx_write(MC417_OEN, SP2_EN_ALL | SP2_DATA);
>+ } else /* data out */
>+ cx_write(MC417_RWD, SP2_CTRL_OFF | data);
>+
>+ /* chip select 0 */
>+ cx_clear(MC417_RWD, SP2_CS0);
>+
>+ /* read/write */
>+ cx_clear(MC417_RWD, (read) ? SP2_RD : SP2_WR);
>+
>+ timeout = jiffies + msecs_to_jiffies(1);
>+ for (;;) {
>+ tmp = cx_read(MC417_RWD);
>+ if ((tmp & SP2_ACK) == 0)
>+ break;
>+ if (time_after(jiffies, timeout))
>+ break;
>+ udelay(1);
>+ }
>+
>+ cx_set(MC417_RWD, SP2_CTRL_OFF);
>+ *mem = tmp & 0xff;
>+
>+ mutex_unlock(&dev->gpio_lock);
>+
>+ if (!read)
>+ if (*mem < 0) {
>+ ret = -EREMOTEIO;
>+ goto err;
>+ }
>+
>+ return 0;
>+err:
>+ return ret;
>+}
>+
> static int cx23885_dvb_set_frontend(struct dvb_frontend *fe)
> {
> struct dtv_frontend_properties *p = &fe->dtv_property_cache;
>@@ -944,11 +1015,11 @@ static int dvb_register(struct cx23885_tsport *port)
> struct vb2_dvb_frontend *fe0, *fe1 = NULL;
> struct si2168_config si2168_config;
> struct si2157_config si2157_config;
>+ struct sp2_config sp2_config;
> struct m88ts2022_config m88ts2022_config;
> struct i2c_board_info info;
> struct i2c_adapter *adapter;
>- struct i2c_client *client_demod;
>- struct i2c_client *client_tuner;
>+ struct i2c_client *client_demod, *client_tuner, *client_ci;
> int mfe_shared = 0; /* bus not shared by default */
> int ret;
>
>@@ -1683,6 +1754,7 @@ static int dvb_register(struct cx23885_tsport *port)
> break;
> case CX23885_BOARD_DVBSKY_T980C:
> i2c_bus = &dev->i2c_bus[1];
>+ i2c_bus2 = &dev->i2c_bus[0];
>
> /* attach frontend */
> memset(&si2168_config, 0, sizeof(si2168_config));
>@@ -1820,6 +1892,35 @@ static int dvb_register(struct cx23885_tsport *port)
> case CX23885_BOARD_DVBSKY_T980C: {
> u8 eeprom[256]; /* 24C02 i2c eeprom */
>
>+ /* attach CI */
>+ memset(&sp2_config, 0, sizeof(sp2_config));
>+ sp2_config.dvb_adap = &port->frontends.adapter;
>+ sp2_config.priv = port;
>+ sp2_config.ci_control = cx23885_sp2_ci_ctrl;
>+ memset(&info, 0, sizeof(struct i2c_board_info));
>+ strlcpy(info.type, "sp2", I2C_NAME_SIZE);
>+ info.addr = 0x40;
>+ info.platform_data = &sp2_config;
>+ request_module(info.type);
>+ client_ci = i2c_new_device(&i2c_bus2->i2c_adap, &info);
>+ if (client_ci == NULL ||
>+ client_ci->dev.driver == NULL) {
>+ module_put(client_tuner->dev.driver->owner);
>+ i2c_unregister_device(client_tuner);
>+ module_put(client_demod->dev.driver->owner);
>+ i2c_unregister_device(client_demod);
>+ goto frontend_detach;
>+ }
>+ if (!try_module_get(client_ci->dev.driver->owner)) {
>+ i2c_unregister_device(client_ci);
>+ module_put(client_tuner->dev.driver->owner);
>+ i2c_unregister_device(client_tuner);
>+ module_put(client_demod->dev.driver->owner);
>+ i2c_unregister_device(client_demod);
>+ goto frontend_detach;
>+ }
>+ port->i2c_client_ci = client_ci;
>+
> if (port->nr != 1)
> break;
>
>--
>1.9.1
>
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