static int mhl_wake_toggle(struct sii9244_data *sii9244,
unsigned long high_period,
unsigned long low_period)
{
int ret;
/* These bits are not documented. */
ret = mhl_tx_set_reg(sii9244, MHL_TX_DISC_CTRL7_REG, (1<<7) | (1<<6));
if (ret < 0)
return ret;
usleep_range(high_period * USEC_PER_MSEC, high_period * USEC_PER_MSEC);
ret = mhl_tx_clear_reg(sii9244, MHL_TX_DISC_CTRL7_REG, (1<<7) | (1<<6));
if (ret < 0)
return ret;
usleep_range(low_period * USEC_PER_MSEC, low_period * USEC_PER_MSEC);
return 0;
}
static irqreturn_t sii9244_irq_thread(int irq, void *data)
{
struct sii9244_data *sii9244 = data;
int ret;
u8 intr1, intr4, value;
u8 intr1_en, intr4_en;
bool release_otg = false;
mutex_lock(&sii9244->lock);
mhl_tx_read_reg(sii9244, MHL_TX_INTR1_REG, &intr1);
mhl_tx_read_reg(sii9244, MHL_TX_INTR4_REG, &intr4);
mhl_tx_read_reg(sii9244, MHL_TX_INTR1_ENABLE_REG, &intr1_en);
mhl_tx_read_reg(sii9244, MHL_TX_INTR4_ENABLE_REG, &intr4_en);
pr_debug("sii9244: irq %02x/%02x %02x/%02x\n", intr1, intr1_en,
intr4, intr4_en);
if (intr4 & RGND_READY_INT) {
ret = mhl_tx_read_reg(sii9244, MHL_TX_STAT2_REG, &value);
if (ret < 0) {
dev_err(&sii9244->pdata->mhl_tx_client->dev,
"STAT2 reg, err %d\n", ret);
goto err_exit;
}
switch (value & RGND_INTP_MASK) {
case RGND_INTP_OPEN:
pr_debug("RGND Open\n");
sii9244->rgnd = RGND_OPEN;
break;
case RGND_INTP_1K:
pr_debug("RGND 1K\n");
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL1_REG,
0x25);
ret = mhl_send_wake_pulses(sii9244);
sii9244->rgnd = RGND_1K;
break;
case RGND_INTP_2K:
pr_debug("RGND 2K\n");
ret = mhl_send_wake_pulses(sii9244);
sii9244->rgnd = RGND_2K;
break;
case RGND_INTP_SHORT:
pr_debug("RGND Short\n");
sii9244->rgnd = RGND_SHORT;
break;
};
}
if (intr4 & CBUS_LKOUT_INT) {
pr_debug("sii9244: CBUS Lockout Interrupt\n");
sii9244->state = STATE_CBUS_LOCKOUT;
}
if (intr4 & MHL_DISC_FAIL_INT)
sii9244->state = STATE_DISCOVERY_FAILED;
if (intr4 & MHL_EST_INT) {
/* discovery override */
ret = mhl_tx_write_reg(sii9244, MHL_TX_MHLTX_CTL1_REG, 0x10);
/* increase DDC translation layer timer (byte mode) */
cbus_write_reg(sii9244, 0x07, 0x32);
cbus_set_reg(sii9244, 0x44, 1<<1);
/* Keep the discovery enabled. Need RGND interrupt */
ret = mhl_tx_set_reg(sii9244, MHL_TX_DISC_CTRL1_REG, (1<<0));
sii9244->state = STATE_ESTABLISHED;
}
if (intr1 & HPD_CHANGE_INT) {
ret = cbus_read_reg(sii9244, MSC_REQ_ABORT_REASON_REG, &value);
if (value & SET_HPD_DOWNSTREAM) {
/* Downstream HPD Highi */
/* Do we need to send HPD upstream using
* Register 0x79(page0)? Is HPD need to be overriden??
* TODO: See if we need code for overriding HPD OUT
* as per Page 0,0x79 Register
*/
/* Enable TMDS */
ret = mhl_tx_set_reg(sii9244, MHL_TX_TMDS_CCTRL,
(1<<4));
pr_debug("sii9244: MHL HPD High, enabled TMDS\n");
ret = mhl_tx_set_reg(sii9244, MHL_TX_INT_CTRL_REG,
(1<<4) | (1<<5));
} else {
/*Downstream HPD Low*/
/* Similar to above comments.
* TODO:Do we need to override HPD OUT value
* and do we need to disable TMDS here?
*/
/* Disable TMDS */
ret = mhl_tx_clear_reg(sii9244, MHL_TX_TMDS_CCTRL,
(1<<4));
pr_debug("sii9244 MHL HPD low, disabled TMDS\n");
ret = mhl_tx_clear_reg(sii9244, MHL_TX_INT_CTRL_REG,
(1<<4) | (1<<5));
}
}
if (intr1 & RSEN_CHANGE_INT) {
ret = mhl_tx_read_reg(sii9244, MHL_TX_SYSSTAT_REG, &value);
sii9244->rsen = value & RSEN_STATUS;
if (value & RSEN_STATUS) {
pr_info("sii9244: MHL cable connected.. RESN High\n");
} else {
pr_info("sii9244: RSEN lost\n");
/* Once RSEN loss is confirmed,we need to check
* based on cable status and chip power status,whether
* it is SINK Loss(HDMI cable not connected, TV Off)
* or MHL cable disconnection
* TODO: Define the below mhl_disconnection()
*/
/* mhl_disconnection(); */
/* Notify Disconnection to OTG */
if (sii9244->claimed == true) {
disable_irq_nosync(sii9244->irq);
release_otg = true;
}
sii9244_power_down(sii9244);
}
}
err_exit:
mhl_tx_write_reg(sii9244, MHL_TX_INTR1_REG, intr1);
mhl_tx_write_reg(sii9244, MHL_TX_INTR4_REG, intr4);
mutex_unlock(&sii9244->lock);
pr_debug("sii9244: wake_up\n");
wake_up(&sii9244->wq);
if (release_otg)
otg_id_notify();
return IRQ_HANDLED;
}
static int sii9244_detection_callback(struct otg_id_notifier_block *nb)
{
struct sii9244_data *sii9244 = container_of(nb, struct sii9244_data,
otg_id_nb);
int ret;
u8 value;
int handled = OTG_ID_UNHANDLED;
pr_debug("sii9244: detection started\n");
mutex_lock(&sii9244->lock);
sii9244->rgnd = RGND_UNKNOWN;
sii9244->state = STATE_DISCONNECTED;
sii9244->rsen = false;
/* Set the board configuration so the sii9244 has access to the
* external connector.
*/
sii9244->pdata->enable(1);
sii9244->pdata->power(1);
ret = sii9244_power_init(sii9244);
if (ret < 0)
goto unhandled;
sii9244_hdmi_init(sii9244);
sii9244_mhl_tx_ctl_int(sii9244);
/* Enable HDCP Compliance safety*/
ret = mhl_tx_write_reg(sii9244, 0x2B, 0x01);
if (ret < 0)
goto unhandled;
/* CBUS discovery cycle time for each drive and float = 150us*/
ret = mhl_tx_read_reg(sii9244, MHL_TX_DISC_CTRL1_REG, &value);
if (ret < 0)
goto unhandled;
value &= ~(1<<2);
value |= (1<<3);
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL1_REG, value);
if (ret < 0)
goto unhandled;
/* Clear bit 6 (reg_skip_rgnd) */
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL2_REG,
(1<<7) /* Reserved Bit */ |
2 << ATT_THRESH_SHIFT |
DEGLITCH_TIME_128MS);
if (ret < 0)
goto unhandled;
/* Changed from 66 to 65 for 94[1:0] = 01 = 5k reg_cbusmhl_pup_sel */
/* 1.8V CBUS VTH & GND threshold */
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL5_REG, 0x75);
if (ret < 0)
goto unhandled;
/* set bit 2 and 3, which is Initiator Timeout */
ret = cbus_read_reg(sii9244, CBUS_LINK_CONTROL_2_REG, &value);
if (ret < 0)
goto unhandled;
value |= 0x0C;
ret = cbus_write_reg(sii9244, CBUS_LINK_CONTROL_2_REG, value);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9244, MHL_TX_MHLTX_CTL6_REG, 0xA0);
if (ret < 0)
goto unhandled;
/* RGND & single discovery attempt (RGND blocking) */
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL6_REG, BLOCK_RGND_INT |
DVRFLT_SEL | SINGLE_ATT);
if (ret < 0)
goto unhandled;
/* Use VBUS path of discovery state machine*/
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL8_REG, 0);
if (ret < 0)
goto unhandled;
ret = mhl_tx_set_reg(sii9244, MHL_TX_DISC_CTRL6_REG, USB_ID_OVR);
if (ret < 0)
goto unhandled;
/* To allow RGND engine to operate correctly.
* When moving the chip from D2 to D0 (power up, init regs)
* the values should be
* 94[1:0] = 01 reg_cbusmhl_pup_sel[1:0] should be set for 5k
* 93[7:6] = 10 reg_cbusdisc_pup_sel[1:0] should be
* set for 10k (default)
* 93[5:4] = 00 reg_cbusidle_pup_sel[1:0] = open (default)
*/
ret = mhl_tx_set_reg(sii9244, MHL_TX_DISC_CTRL3_REG, 0x86);
if (ret < 0)
goto unhandled;
/* change from CC to 8C to match 5K*/
ret = mhl_tx_set_reg(sii9244, MHL_TX_DISC_CTRL4_REG, 0x8C);
if (ret < 0)
goto unhandled;
/* Configure the interrupt as active high */
ret = mhl_tx_clear_reg(sii9244, MHL_TX_INT_CTRL_REG, (1<<2) | (1<<1));
if (ret < 0)
goto unhandled;
msleep(25);
ret = mhl_tx_clear_reg(sii9244, MHL_TX_DISC_CTRL6_REG, USB_ID_OVR);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9244, MHL_TX_DISC_CTRL1_REG, 0x27);
if (ret < 0)
goto unhandled;
/* Reset CBUS */
ret = mhl_tx_set_reg(sii9244, 0x05, 0x03);
if (ret < 0)
goto unhandled;
usleep_range(2000, 3000);
ret = mhl_tx_clear_reg(sii9244, 0x05, 0x03);
if (ret < 0)
goto unhandled;
/* Adjust interrupt mask everytime reset is performed.*/
ret = cbus_write_reg(sii9244, 0x09, 0);
if (ret < 0)
goto unhandled;
ret = cbus_write_reg(sii9244, 0x1F, 0);
if (ret < 0)
goto unhandled;
/* Enable Auto soft reset on SCDT = 0*/
ret = mhl_tx_write_reg(sii9244, 0x05, 0x04);
if (ret < 0)
goto unhandled;
/* HDMI Transcode mode enable*/
ret = mhl_tx_write_reg(sii9244, 0x0D, 0x1C);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9244, MHL_TX_INTR4_ENABLE_REG,
RGND_READY_MASK | CBUS_LKOUT_MASK |
MHL_DISC_FAIL_MASK | MHL_EST_MASK);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9244, MHL_TX_INTR1_ENABLE_REG,
(1<<5) | (1<<6));
if (ret < 0)
goto unhandled;
pr_debug("sii9244: waiting for RGND measurement\n");
enable_irq(sii9244->irq);
/* SiI9244 Programmer's Reference Section 2.4.3
* State : RGND Ready
*/
mutex_unlock(&sii9244->lock);
ret = wait_event_timeout(sii9244->wq,
((sii9244->rgnd != RGND_UNKNOWN) ||
mhl_state_is_error(sii9244->state)),
msecs_to_jiffies(2000));
mutex_lock(&sii9244->lock);
if (sii9244->rgnd == RGND_UNKNOWN || mhl_state_is_error(sii9244->state))
goto unhandled;
if (sii9244->rgnd != RGND_1K)
goto unhandled;
mutex_unlock(&sii9244->lock);
pr_debug("sii9244: waiting for detection\n");
ret = wait_event_timeout(sii9244->wq,
sii9244->state != STATE_DISCONNECTED,
msecs_to_jiffies(500));
mutex_lock(&sii9244->lock);
if (sii9244->state == STATE_DISCONNECTED)
goto unhandled;
if (sii9244->state == STATE_DISCOVERY_FAILED) {
handled = OTG_ID_PROXY_WAIT;
goto unhandled;
}
if (mhl_state_is_error(sii9244->state))
goto unhandled;
mutex_unlock(&sii9244->lock);
wait_event_timeout(sii9244->wq, sii9244->rsen, msecs_to_jiffies(400));
mutex_lock(&sii9244->lock);
if (!sii9244->rsen)
goto unhandled;
pr_info("si9234: connection established\n");
sii9244->claimed = true;
sii9234_vbus_present(true);
mutex_unlock(&sii9244->lock);
return OTG_ID_HANDLED;
unhandled:
pr_info("sii9244: Detection failed");
if (sii9244->state == STATE_DISCONNECTED)
pr_cont(" (timeout)");
else if (sii9244->state == STATE_DISCOVERY_FAILED)
pr_cont(" (discovery failed)");
else if (sii9244->state == STATE_CBUS_LOCKOUT)
pr_cont(" (cbus_lockout)");
pr_cont("\n");
disable_irq_nosync(sii9244->irq);
sii9244_power_down(sii9244);
mutex_unlock(&sii9244->lock);
return handled;
}
static int sii9234_30pin_init_for_9290(struct sii9234_data *sii9234)
{
u8 value;
int ret = 0;
pr_info("[MHD: %s]++\n", __func__);
/* init registers */
ret = sii9234_30pin_reg_init_for_9290(sii9234);
if (ret < 0)
goto unhandled;
/* start tpi */
ret = mhl_tx_write_reg(sii9234, 0xC7, 0x00);
if (ret < 0)
goto unhandled;
/* enable interrupts */
ret = mhl_tx_write_reg(sii9234, 0xBC, 0x01);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBD, 0x78);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBE, 0x01);
if (ret < 0)
goto unhandled;
/* mhd rx connected */
ret = mhl_tx_write_reg(sii9234, 0xBC, 0x01);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBD, 0xA0);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBE, 0x10);
if (ret < 0)
goto unhandled;
ret = cbus_write_reg(sii9234, 0x07, 0x30 | 0x0E);
if (ret < 0)
goto unhandled;
ret = cbus_write_reg(sii9234, 0x47, 0x03);
if (ret < 0)
goto unhandled;
ret = cbus_write_reg(sii9234, 0x21, 0x01);
if (ret < 0)
goto unhandled;
/* enable mhd tx */
ret = mhl_tx_clear_reg(sii9234, 0x1A, 1<<4);
if (ret < 0)
goto unhandled;
/* set mhd power active mode */
ret = mhl_tx_clear_reg(sii9234, 0x1E, 1<<1 | 1<<0);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBC, 0x01);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBD, 0xA0);
if (ret < 0)
goto unhandled;
ret = mhl_tx_read_reg(sii9234, 0xBE, &value);
if (ret < 0)
goto unhandled;
if ((value & (1<<7 | 1<<6)) != 0x00) {
/* Assert Mobile HD FIFO Reset */
ret = mhl_tx_write_reg(sii9234, 0xBC, 0x01);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBD, 0x05);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBE, (1<<4 | 0x04));
if (ret < 0)
goto unhandled;
mdelay(1);
/* Deassert Mobile HD FIFO Reset */
ret = mhl_tx_write_reg(sii9234, 0xBC, 0x01);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBD, 0x05);
if (ret < 0)
goto unhandled;
ret = mhl_tx_write_reg(sii9234, 0xBE, 0x04);
if (ret < 0)
goto unhandled;
}
/* This is tricky but there's no way to handle other accessories
* but sending UNHANDLED.
* return MHL_CON_HANDLED;
*/
pr_info("[MHD: %s]--\n", __func__);
return 0;
unhandled:
return -1;
}
static int sii9234_30pin_reg_init_for_9290(struct sii9234_data *sii9234)
{
int ret = 0;
u8 value;
pr_info("[: %s]++\n", __func__);
ret = tpi_write_reg(sii9234, 0x3D, 0x3F);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x11, 0x01);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x12, 0x15);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x08, 0x35);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x00, 0x00);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x13, 0x60);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x14, 0xF0);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x4B, 0x06);
if (ret < 0)
return ret;
/* Analog PLL Control */
ret = hdmi_rx_write_reg(sii9234, 0x17, 0x07);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x1A, 0x20);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x22, 0xE0);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x23, 0xC0);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x24, 0xA0);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x25, 0x80);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x26, 0x60);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x27, 0x40);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x28, 0x20);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x29, 0x00);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x4D, 0x02);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x4C, 0xA0);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x80, 0x34);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x31, 0x0B);
if (ret < 0)
return ret;
ret = hdmi_rx_write_reg(sii9234, 0x45, 0x06);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0xA0, 0xD0);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0xA1, 0xFC);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0xA3 /*MHL_TX_MHLTX_CTL4_REG*/,
sii9234->pdata->swing_level);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0xA6, 0x00);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x2B, 0x01);
if (ret < 0)
return ret;
/* CBUS & Discovery */
ret = mhl_tx_read_reg(sii9234, 0x90/*MHL_TX_DISC_CTRL1_REG*/, &value);
if (ret < 0)
return ret;
value &= ~(1<<2);
value |= (1<<3);
ret = mhl_tx_write_reg(sii9234, 0x90 /*MHL_TX_DISC_CTRL1_REG*/, value);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x91, 0xE5);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x94, 0x66);
if (ret < 0)
return ret;
ret = cbus_read_reg(sii9234, 0x31, &value);
if (ret < 0)
return ret;
value |= 0x0C;
if (ret < 0)
return ret;
ret = cbus_write_reg(sii9234, 0x31, value);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0xA5, 0x80);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x95, 0x31);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x96, 0x22);
if (ret < 0)
return ret;
ret = mhl_tx_read_reg(sii9234, 0x95/*MHL_TX_DISC_CTRL6_REG*/, &value);
if (ret < 0)
return ret;
value |= (1<<6);
ret = mhl_tx_write_reg(sii9234, 0x95/*MHL_TX_DISC_CTRL6_REG*/, value);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x92, 0x46);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x93, 0xDC);
if (ret < 0)
return ret;
/*0x79=MHL_TX_INT_CTRL_REG*/
ret = mhl_tx_clear_reg(sii9234, 0x79, (1<<2) | (1<<1));
if (ret < 0)
return ret;
mdelay(25);
/*0x95=MHL_TX_DISC_CTRL6_REG*/
ret = mhl_tx_clear_reg(sii9234, 0x95, (1<<6)/*USB_ID_OVR*/);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x90, 0x27);
if (ret < 0)
return ret;
ret = sii9234_cbus_init_for_9290(sii9234);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x05, 0x4);
if (ret < 0)
return ret;
ret = mhl_tx_write_reg(sii9234, 0x0D, 0x1C);
pr_info("[MHD: %s]--\n", __func__);
return ret;
}
