diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-driver.c | 19 | ||||
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-driver.h | 4 | ||||
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-i2c.c | 7 |
3 files changed, 28 insertions, 2 deletions
diff --git a/drivers/media/video/ivtv/ivtv-driver.c b/drivers/media/video/ivtv/ivtv-driver.c index 7cdbc1a8f218..8330fb5c7eb3 100644 --- a/drivers/media/video/ivtv/ivtv-driver.c +++ b/drivers/media/video/ivtv/ivtv-driver.c @@ -91,10 +91,15 @@ static int radio[IVTV_MAX_CARDS] = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }; +static int i2c_clock_period[IVTV_MAX_CARDS] = { -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1 }; static unsigned int cardtype_c = 1; static unsigned int tuner_c = 1; static unsigned int radio_c = 1; +static unsigned int i2c_clock_period_c = 1; static char pal[] = "---"; static char secam[] = "--"; static char ntsc[] = "-"; @@ -151,6 +156,7 @@ module_param(dec_vbi_buffers, int, 0644); module_param(tunertype, int, 0644); module_param(newi2c, int, 0644); +module_param_array(i2c_clock_period, int, &i2c_clock_period_c, 0644); MODULE_PARM_DESC(tuner, "Tuner type selection,\n" "\t\t\tsee tuner.h for values"); @@ -245,6 +251,10 @@ MODULE_PARM_DESC(newi2c, "Use new I2C implementation\n" "\t\t\t-1 is autodetect, 0 is off, 1 is on\n" "\t\t\tDefault is autodetect"); +MODULE_PARM_DESC(i2c_clock_period, + "Period of SCL for the I2C bus controlled by the CX23415/6\n" + "\t\t\tMin: 10 usec (100 kHz), Max: 4500 usec (222 Hz)\n" + "\t\t\tDefault: " __stringify(IVTV_DEFAULT_I2C_CLOCK_PERIOD)); MODULE_PARM_DESC(ivtv_first_minor, "Set device node number assigned to first card"); @@ -600,6 +610,15 @@ static void ivtv_process_options(struct ivtv *itv) itv->options.cardtype = cardtype[itv->instance]; itv->options.tuner = tuner[itv->instance]; itv->options.radio = radio[itv->instance]; + + itv->options.i2c_clock_period = i2c_clock_period[itv->instance]; + if (itv->options.i2c_clock_period == -1) + itv->options.i2c_clock_period = IVTV_DEFAULT_I2C_CLOCK_PERIOD; + else if (itv->options.i2c_clock_period < 10) + itv->options.i2c_clock_period = 10; + else if (itv->options.i2c_clock_period > 4500) + itv->options.i2c_clock_period = 4500; + itv->options.newi2c = newi2c; if (tunertype < -1 || tunertype > 1) { IVTV_WARN("Invalid tunertype argument, will autodetect instead\n"); diff --git a/drivers/media/video/ivtv/ivtv-driver.h b/drivers/media/video/ivtv/ivtv-driver.h index 440f7328a7ed..2b3db90afb74 100644 --- a/drivers/media/video/ivtv/ivtv-driver.h +++ b/drivers/media/video/ivtv/ivtv-driver.h @@ -176,12 +176,16 @@ extern int ivtv_debug; #define IVTV_MAX_PGM_INDEX (400) +/* Default I2C SCL period in microseconds */ +#define IVTV_DEFAULT_I2C_CLOCK_PERIOD 20 + struct ivtv_options { int kilobytes[IVTV_MAX_STREAMS]; /* size in kilobytes of each stream */ int cardtype; /* force card type on load */ int tuner; /* set tuner on load */ int radio; /* enable/disable radio */ int newi2c; /* new I2C algorithm */ + int i2c_clock_period; /* period of SCL for I2C bus */ }; /* ivtv-specific mailbox template */ diff --git a/drivers/media/video/ivtv/ivtv-i2c.c b/drivers/media/video/ivtv/ivtv-i2c.c index b9c71e61f7d6..d4cc3365038e 100644 --- a/drivers/media/video/ivtv/ivtv-i2c.c +++ b/drivers/media/video/ivtv/ivtv-i2c.c @@ -564,13 +564,15 @@ static struct i2c_adapter ivtv_i2c_adap_template = { .owner = THIS_MODULE, }; +#define IVTV_ALGO_BIT_TIMEOUT (2) /* seconds */ + static const struct i2c_algo_bit_data ivtv_i2c_algo_template = { .setsda = ivtv_setsda_old, .setscl = ivtv_setscl_old, .getsda = ivtv_getsda_old, .getscl = ivtv_getscl_old, - .udelay = 10, - .timeout = 200, + .udelay = IVTV_DEFAULT_I2C_CLOCK_PERIOD / 2, /* microseconds */ + .timeout = IVTV_ALGO_BIT_TIMEOUT * HZ, /* jiffies */ }; static struct i2c_client ivtv_i2c_client_template = { @@ -602,6 +604,7 @@ int init_ivtv_i2c(struct ivtv *itv) memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template, sizeof(struct i2c_algo_bit_data)); } + itv->i2c_algo.udelay = itv->options.i2c_clock_period / 2; itv->i2c_algo.data = itv; itv->i2c_adap.algo_data = &itv->i2c_algo; |