static int debug;
-/* Despite the name "hybrid_tuner", the framework works just as well for
- hybrid demodulators as well... */
-static LIST_HEAD(hybrid_tuner_instance_list);
-static DEFINE_MUTEX(au8522_list_mutex);
-
#define dprintk(arg...)\
do { if (debug)\
printk(arg);\
} while (0)
-/* 16 bit registers, 8 bit values */
-int au8522_writereg(struct au8522_state *state, u16 reg, u8 data)
-{
- int ret;
- u8 buf[] = { (reg >> 8) | 0x80, reg & 0xff, data };
-
- struct i2c_msg msg = { .addr = state->config->demod_address,
- .flags = 0, .buf = buf, .len = 3 };
-
- ret = i2c_transfer(state->i2c, &msg, 1);
-
- if (ret != 1)
- printk("%s: writereg error (reg == 0x%02x, val == 0x%04x, "
- "ret == %i)\n", __func__, reg, data, ret);
-
- return (ret != 1) ? -1 : 0;
-}
-
-u8 au8522_readreg(struct au8522_state *state, u16 reg)
-{
- int ret;
- u8 b0[] = { (reg >> 8) | 0x40, reg & 0xff };
- u8 b1[] = { 0 };
-
- struct i2c_msg msg[] = {
- { .addr = state->config->demod_address, .flags = 0,
- .buf = b0, .len = 2 },
- { .addr = state->config->demod_address, .flags = I2C_M_RD,
- .buf = b1, .len = 1 } };
-
- ret = i2c_transfer(state->i2c, msg, 2);
-
- if (ret != 2)
- printk(KERN_ERR "%s: readreg error (ret == %i)\n",
- __func__, ret);
- return b1[0];
-}
-
-static int au8522_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
-{
- struct au8522_state *state = fe->demodulator_priv;
-
- dprintk("%s(%d)\n", __func__, enable);
-
- if (state->operational_mode == AU8522_ANALOG_MODE) {
- /* We're being asked to manage the gate even though we're
- not in digital mode. This can occur if we get switched
- over to analog mode before the dvb_frontend kernel thread
- has completely shutdown */
- return 0;
- }
-
- if (enable)
- return au8522_writereg(state, 0x106, 1);
- else
- return au8522_writereg(state, 0x106, 0);
-}
-
struct mse2snr_tab {
u16 val;
u16 data;
return 0;
}
-/* Reset the demod hardware and reset all of the configuration registers
- to a default state. */
-int au8522_init(struct dvb_frontend *fe)
-{
- struct au8522_state *state = fe->demodulator_priv;
- dprintk("%s()\n", __func__);
-
- state->operational_mode = AU8522_DIGITAL_MODE;
-
- /* Clear out any state associated with the digital side of the
- chip, so that when it gets powered back up it won't think
- that it is already tuned */
- state->current_frequency = 0;
-
- au8522_writereg(state, 0xa4, 1 << 5);
-
- au8522_i2c_gate_ctrl(fe, 1);
-
- return 0;
-}
-
-static int au8522_led_gpio_enable(struct au8522_state *state, int onoff)
-{
- struct au8522_led_config *led_config = state->config->led_cfg;
- u8 val;
-
- /* bail out if we can't control an LED */
- if (!led_config || !led_config->gpio_output ||
- !led_config->gpio_output_enable || !led_config->gpio_output_disable)
- return 0;
-
- val = au8522_readreg(state, 0x4000 |
- (led_config->gpio_output & ~0xc000));
- if (onoff) {
- /* enable GPIO output */
- val &= ~((led_config->gpio_output_enable >> 8) & 0xff);
- val |= (led_config->gpio_output_enable & 0xff);
- } else {
- /* disable GPIO output */
- val &= ~((led_config->gpio_output_disable >> 8) & 0xff);
- val |= (led_config->gpio_output_disable & 0xff);
- }
- return au8522_writereg(state, 0x8000 |
- (led_config->gpio_output & ~0xc000), val);
-}
-
-/* led = 0 | off
- * led = 1 | signal ok
- * led = 2 | signal strong
- * led < 0 | only light led if leds are currently off
- */
-static int au8522_led_ctrl(struct au8522_state *state, int led)
-{
- struct au8522_led_config *led_config = state->config->led_cfg;
- int i, ret = 0;
-
- /* bail out if we can't control an LED */
- if (!led_config || !led_config->gpio_leds ||
- !led_config->num_led_states || !led_config->led_states)
- return 0;
-
- if (led < 0) {
- /* if LED is already lit, then leave it as-is */
- if (state->led_state)
- return 0;
- else
- led *= -1;
- }
-
- /* toggle LED if changing state */
- if (state->led_state != led) {
- u8 val;
-
- dprintk("%s: %d\n", __func__, led);
-
- au8522_led_gpio_enable(state, 1);
-
- val = au8522_readreg(state, 0x4000 |
- (led_config->gpio_leds & ~0xc000));
-
- /* start with all leds off */
- for (i = 0; i < led_config->num_led_states; i++)
- val &= ~led_config->led_states[i];
-
- /* set selected LED state */
- if (led < led_config->num_led_states)
- val |= led_config->led_states[led];
- else if (led_config->num_led_states)
- val |=
- led_config->led_states[led_config->num_led_states - 1];
-
- ret = au8522_writereg(state, 0x8000 |
- (led_config->gpio_leds & ~0xc000), val);
- if (ret < 0)
- return ret;
-
- state->led_state = led;
-
- if (led == 0)
- au8522_led_gpio_enable(state, 0);
- }
-
- return 0;
-}
-
-int au8522_sleep(struct dvb_frontend *fe)
-{
- struct au8522_state *state = fe->demodulator_priv;
- dprintk("%s()\n", __func__);
-
- /* Only power down if the digital side is currently using the chip */
- if (state->operational_mode == AU8522_ANALOG_MODE) {
- /* We're not in one of the expected power modes, which means
- that the DVB thread is probably telling us to go to sleep
- even though the analog frontend has already started using
- the chip. So ignore the request */
- return 0;
- }
-
- /* turn off led */
- au8522_led_ctrl(state, 0);
-
- /* Power down the chip */
- au8522_writereg(state, 0xa4, 1 << 5);
-
- state->current_frequency = 0;
-
- return 0;
-}
-
static int au8522_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct au8522_state *state = fe->demodulator_priv;
static struct dvb_frontend_ops au8522_ops;
-int au8522_get_state(struct au8522_state **state, struct i2c_adapter *i2c,
- u8 client_address)
-{
- int ret;
-
- mutex_lock(&au8522_list_mutex);
- ret = hybrid_tuner_request_state(struct au8522_state, (*state),
- hybrid_tuner_instance_list,
- i2c, client_address, "au8522");
- mutex_unlock(&au8522_list_mutex);
-
- return ret;
-}
-
-void au8522_release_state(struct au8522_state *state)
-{
- mutex_lock(&au8522_list_mutex);
- if (state != NULL)
- hybrid_tuner_release_state(state);
- mutex_unlock(&au8522_list_mutex);
-}
-
static void au8522_release(struct dvb_frontend *fe)
{
projects / ~andy / linux / blobdiff