static int mhl_chip_init(void)
{
/* Read the chip rev ID */
mhl_msm_state->chip_rev_id = mhl_i2c_reg_read(TX_PAGE_L0, 0x04);
pr_debug("MHL: chip rev ID read=[%x]\n", mhl_msm_state->chip_rev_id);
/* Reset the TX chip */
mhl_sii_reset_pin(1);
msleep(20);
mhl_sii_reset_pin(0);
msleep(20);
mhl_sii_reset_pin(1);
/* MHL spec requires a 100 ms wait here. */
msleep(100);
/*
* Need to disable MHL discovery
*/
mhl_init_reg_settings(true);
/*
* Power down the chip to the
* D3 - a low power standby mode
* cable impedance measurement logic is operational
*/
switch_mode(POWER_STATE_D3);
return 0;
}
static int mhl_tx_chip_init(struct mhl_tx_ctrl *mhl_ctrl)
{
uint8_t chip_rev_id = 0x00;
struct i2c_client *client = mhl_ctrl->i2c_handle;
unsigned long flags;
spin_lock_irqsave(&mhl_ctrl->lock, flags);
mhl_ctrl->dwnstream_hpd = 0;
mhl_ctrl->tx_powered_off = false;
spin_unlock_irqrestore(&mhl_ctrl->lock, flags);
/* Reset the TX chip */
mhl_sii_reset_pin(mhl_ctrl, 0);
msleep(20);
mhl_sii_reset_pin(mhl_ctrl, 1);
/* TX PR-guide requires a 100 ms wait here */
msleep(100);
/* Read the chip rev ID */
chip_rev_id = MHL_SII_PAGE0_RD(0x04);
pr_debug("MHL: chip rev ID read=[%x]\n", chip_rev_id);
mhl_ctrl->chip_rev_id = chip_rev_id;
/*
* Need to disable MHL discovery if
* MHL-USB handshake is implemented
*/
mhl_init_reg_settings(mhl_ctrl, true);
switch_mode(mhl_ctrl, POWER_STATE_D3, true);
return 0;
}
static int mhl_tx_chip_init(struct mhl_tx_ctrl *mhl_ctrl)
{
uint8_t chip_rev_id = 0x00;
struct i2c_client *client = mhl_ctrl->i2c_handle;
/* Reset the TX chip */
mhl_sii_reset_pin(mhl_ctrl, 0);
msleep(20);
mhl_sii_reset_pin(mhl_ctrl, 1);
/* TX PR-guide requires a 100 ms wait here */
msleep(100);
/* Read the chip rev ID */
chip_rev_id = MHL_SII_PAGE0_RD(0x04);
pr_debug("MHL: chip rev ID read=[%x]\n", chip_rev_id);
mhl_ctrl->chip_rev_id = chip_rev_id;
/*
* Need to disable MHL discovery if
* MHL-USB handshake is implemented
*/
mhl_init_reg_settings(mhl_ctrl, true);
switch_mode(mhl_ctrl, POWER_STATE_D3);
return 0;
}
/* USB_HANDSHAKING FUNCTIONS */
static int mhl_sii_device_discovery(void *data, int id,
void (*usb_notify_cb)(int online))
{
int rc;
struct mhl_tx_ctrl *mhl_ctrl = data;
if (id) {
/* When MHL cable is disconnected we get a sii8334
* mhl_disconnect interrupt which is handled separately.
*/
pr_debug("%s: USB ID pin high\n", __func__);
return id;
}
if (!mhl_ctrl || !usb_notify_cb) {
pr_warn("%s: cb || ctrl is NULL\n", __func__);
/* return "USB" so caller can proceed */
return -EINVAL;
}
if (!mhl_ctrl->notify_usb_online)
mhl_ctrl->notify_usb_online = usb_notify_cb;
if (!mhl_ctrl->disc_enabled) {
mhl_sii_reset_pin(mhl_ctrl, 0);
msleep(50);
mhl_sii_reset_pin(mhl_ctrl, 1);
/* TX PR-guide requires a 100 ms wait here */
msleep(100);
mhl_init_reg_settings(mhl_ctrl, true);
rc = mhl_sii_wait_for_rgnd(mhl_ctrl);
} else {
if (mhl_ctrl->cur_state == POWER_STATE_D3) {
rc = mhl_sii_wait_for_rgnd(mhl_ctrl);
} else {
/* in MHL mode */
pr_debug("%s:%u\n", __func__, __LINE__);
rc = 0;
}
}
pr_debug("%s: ret result: %s\n", __func__, rc ? "usb" : " mhl");
return rc;
}
static int mhl_chip_init(void)
{
mhl_msm_state->chip_rev_id = mhl_i2c_reg_read(TX_PAGE_L0, 0x04);
pr_debug("MHL: chip rev ID read=[%x]\n", mhl_msm_state->chip_rev_id);
mhl_sii_reset_pin(1);
msleep(20);
mhl_sii_reset_pin(0);
msleep(20);
mhl_sii_reset_pin(1);
msleep(100);
mhl_init_reg_settings(true);
switch_mode(POWER_STATE_D3);
return 0;
}
