/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include "sti_hdmi_tx3g0c55phy.h"
#define HDMI_SRZ_PLL_CFG 0x0504
#define HDMI_SRZ_TAP_1 0x0508
#define HDMI_SRZ_TAP_2 0x050C
#define HDMI_SRZ_TAP_3 0x0510
#define HDMI_SRZ_CTRL 0x0514
#define HDMI_SRZ_PLL_CFG_POWER_DOWN BIT(0)
#define HDMI_SRZ_PLL_CFG_VCOR_SHIFT 1
#define HDMI_SRZ_PLL_CFG_VCOR_425MHZ 0
#define HDMI_SRZ_PLL_CFG_VCOR_850MHZ 1
#define HDMI_SRZ_PLL_CFG_VCOR_1700MHZ 2
#define HDMI_SRZ_PLL_CFG_VCOR_3000MHZ 3
#define HDMI_SRZ_PLL_CFG_VCOR_MASK 3
#define HDMI_SRZ_PLL_CFG_VCOR(x) (x << HDMI_SRZ_PLL_CFG_VCOR_SHIFT)
#define HDMI_SRZ_PLL_CFG_NDIV_SHIFT 8
#define HDMI_SRZ_PLL_CFG_NDIV_MASK (0x1F << HDMI_SRZ_PLL_CFG_NDIV_SHIFT)
#define HDMI_SRZ_PLL_CFG_MODE_SHIFT 16
#define HDMI_SRZ_PLL_CFG_MODE_13_5_MHZ 0x1
#define HDMI_SRZ_PLL_CFG_MODE_25_2_MHZ 0x4
#define HDMI_SRZ_PLL_CFG_MODE_27_MHZ 0x5
#define HDMI_SRZ_PLL_CFG_MODE_33_75_MHZ 0x6
#define HDMI_SRZ_PLL_CFG_MODE_40_5_MHZ 0x7
#define HDMI_SRZ_PLL_CFG_MODE_54_MHZ 0x8
#define HDMI_SRZ_PLL_CFG_MODE_67_5_MHZ 0x9
#define HDMI_SRZ_PLL_CFG_MODE_74_25_MHZ 0xA
#define HDMI_SRZ_PLL_CFG_MODE_81_MHZ 0xB
#define HDMI_SRZ_PLL_CFG_MODE_82_5_MHZ 0xC
#define HDMI_SRZ_PLL_CFG_MODE_108_MHZ 0xD
#define HDMI_SRZ_PLL_CFG_MODE_148_5_MHZ 0xE
#define HDMI_SRZ_PLL_CFG_MODE_165_MHZ 0xF
#define HDMI_SRZ_PLL_CFG_MODE_MASK 0xF
#define HDMI_SRZ_PLL_CFG_MODE(x) (x << HDMI_SRZ_PLL_CFG_MODE_SHIFT)
#define HDMI_SRZ_CTRL_POWER_DOWN (1 << 0)
#define HDMI_SRZ_CTRL_EXTERNAL_DATA_EN (1 << 1)
/* sysconf registers */
#define HDMI_REJECTION_PLL_CONFIGURATION 0x0858 /* SYSTEM_CONFIG2534 */
#define HDMI_REJECTION_PLL_STATUS 0x0948 /* SYSTEM_CONFIG2594 */
#define REJECTION_PLL_HDMI_ENABLE_SHIFT 0
#define REJECTION_PLL_HDMI_ENABLE_MASK (0x1 << REJECTION_PLL_HDMI_ENABLE_SHIFT)
#define REJECTION_PLL_HDMI_PDIV_SHIFT 24
#define REJECTION_PLL_HDMI_PDIV_MASK (0x7 << REJECTION_PLL_HDMI_PDIV_SHIFT)
#define REJECTION_PLL_HDMI_NDIV_SHIFT 16
#define REJECTION_PLL_HDMI_NDIV_MASK (0xFF << REJECTION_PLL_HDMI_NDIV_SHIFT)
#define REJECTION_PLL_HDMI_MDIV_SHIFT 8
#define REJECTION_PLL_HDMI_MDIV_MASK (0xFF << REJECTION_PLL_HDMI_MDIV_SHIFT)
#define REJECTION_PLL_HDMI_REJ_PLL_LOCK BIT(0)
#define HDMI_TIMEOUT_PLL_LOCK 50 /*milliseconds */
/**
* pll mode structure
*
* A pointer to an array of these structures is passed to a TMDS (HDMI) output
* via the control interface to provide board and SoC specific
* configurations of the HDMI PHY. Each entry in the array specifies a hardware
* specific configuration for a given TMDS clock frequency range. The array
* should be terminated with an entry that has all fields set to zero.
*
* @min: Lower bound of TMDS clock frequency this entry applies to
* @max: Upper bound of TMDS clock frequency this entry applies to
* @mode: SoC specific register configuration
*/
struct pllmode {
u32 min;
u32 max;
u32 mode;
};
#define NB_PLL_MODE 7
static struct pllmode pllmodes[NB_PLL_MODE] = {
{13500000, 13513500, HDMI_SRZ_PLL_CFG_MODE_13_5_MHZ},
{25174800, 25200000, HDMI_SRZ_PLL_CFG_MODE_25_2_MHZ},
{27000000, 27027000, HDMI_SRZ_PLL_CFG_MODE_27_MHZ},
{54000000, 54054000, HDMI_SRZ_PLL_CFG_MODE_54_MHZ},
{72000000, 74250000, HDMI_SRZ_PLL_CFG_MODE_74_25_MHZ},
{108000000, 108108000, HDMI_SRZ_PLL_CFG_MODE_108_MHZ},
{148351648, 297000000, HDMI_SRZ_PLL_CFG_MODE_148_5_MHZ}
};
#define NB_HDMI_PHY_CONFIG 5
static struct hdmi_phy_config hdmiphy_config[NB_HDMI_PHY_CONFIG] = {
{0, 40000000, {0x00101010, 0x00101010, 0x00101010, 0x02} },
{40000000, 140000000, {0x00111111, 0x00111111, 0x00111111, 0x02} },
{140000000, 160000000, {0x00131313, 0x00101010, 0x00101010, 0x02} },
{160000000, 250000000, {0x00131313, 0x00111111, 0x00111111, 0x03FE} },
{250000000, 300000000, {0x00151515, 0x00101010, 0x00101010, 0x03FE} },
};
#define PLL_CHANGE_DELAY 1 /* ms */
/**
* Disable the pll rejection
*
* @hdmi: pointer on the hdmi internal structure
*
* return true if the pll has been disabled
*/
static bool disable_pll_rejection(struct sti_hdmi *hdmi)
{
u32 val;
DRM_DEBUG_DRIVER("\n");
val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
val &= ~REJECTION_PLL_HDMI_ENABLE_MASK;
writel(val, hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
msleep(PLL_CHANGE_DELAY);
val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_STATUS);
return !(val & REJECTION_PLL_HDMI_REJ_PLL_LOCK);
}
/**
* Enable the old BCH/rejection PLL is now reused to provide the CLKPXPLL
* clock input to the new PHY PLL that generates the serializer clock
* (TMDS*10) and the TMDS clock which is now fed back into the HDMI
* formatter instead of the TMDS clock line from ClockGenB.
*
* @hdmi: pointer on the hdmi internal structure
*
* return true if pll has been correctly set
*/
static bool enable_pll_rejection(struct sti_hdmi *hdmi)
{
unsigned int inputclock;
u32 mdiv, ndiv, pdiv, val;
DRM_DEBUG_DRIVER("\n");
if (!disable_pll_rejection(hdmi))
return false;
inputclock = hdmi->mode.clock * 1000;
DRM_DEBUG_DRIVER("hdmi rejection pll input clock = %dHz\n", inputclock);
/* Power up the HDMI rejection PLL
* Note: On this SoC (stiH416) we are forced to have the input clock
* be equal to the HDMI pixel clock.
*
* The values here have been suggested by validation however they are
* still provisional and subject to change.
*
* PLLout = (Fin*Mdiv) / ((2 * Ndiv) / 2^Pdiv)
*/
if (inputclock < 50000000) {
/*
* For slower clocks we need to multiply more to keep the
* internal VCO frequency within the physical specification
* of the PLL.
*/
pdiv = 4;
ndiv = 240;
mdiv = 30;
} else {
pdiv = 2;
ndiv = 60;
mdiv = 30;
}
val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
val &= ~(REJECTION_PLL_HDMI_PDIV_MASK |
REJECTION_PLL_HDMI_NDIV_MASK |
REJECTION_PLL_HDMI_MDIV_MASK |
REJECTION_PLL_HDMI_ENABLE_MASK);
val |= (pdiv << REJECTION_PLL_HDMI_PDIV_SHIFT) |
(ndiv << REJECTION_PLL_HDMI_NDIV_SHIFT) |
(mdiv << REJECTION_PLL_HDMI_MDIV_SHIFT) |
(0x1 << REJECTION_PLL_HDMI_ENABLE_SHIFT);
writel(val, hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
msleep(PLL_CHANGE_DELAY);
val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_STATUS);
return (val & REJECTION_PLL_HDMI_REJ_PLL_LOCK);
}
/**
* Start hdmi phy macro cell tx3g0c55
*
* @hdmi: pointer on the hdmi internal structure
*
* Return false if an error occur
*/
static bool sti_hdmi_tx3g0c55phy_start(struct sti_hdmi *hdmi)
{
u32 ckpxpll = hdmi->mode.clock * 1000;
u32 val, tmdsck, freqvco, pllctrl = 0;
unsigned int i;
if (!enable_pll_rejection(hdmi))
return false;
DRM_DEBUG_DRIVER("ckpxpll = %dHz\n", ckpxpll);
/* Assuming no pixel repetition and 24bits color */
tmdsck = ckpxpll;
pllctrl = 2 << HDMI_SRZ_PLL_CFG_NDIV_SHIFT;
/*
* Setup the PLL mode parameter based on the ckpxpll. If we haven't got
* a clock frequency supported by one of the specific PLL modes then we
* will end up using the generic mode (0) which only supports a 10x
* multiplier, hence only 24bit color.
*/
for (i = 0; i < NB_PLL_MODE; i++) {
if (ckpxpll >= pllmodes[i].min && ckpxpll <= pllmodes[i].max)
pllctrl |= HDMI_SRZ_PLL_CFG_MODE(pllmodes[i].mode);
}
freqvco = tmdsck * 10;
if (freqvco <= 425000000UL)
pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_425MHZ);
else if (freqvco <= 850000000UL)
pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_850MHZ);
else if (freqvco <= 1700000000UL)
pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_1700MHZ);
else if (freqvco <= 2970000000UL)
pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_3000MHZ);
else {
DRM_ERROR("PHY serializer clock out of range\n");
goto err;
}
/*
* Configure and power up the PHY PLL
*/
hdmi->event_received = false;
DRM_DEBUG_DRIVER("pllctrl = 0x%x\n", pllctrl);
hdmi_write(hdmi, pllctrl, HDMI_SRZ_PLL_CFG);
/* wait PLL interrupt */
wait_event_interruptible_timeout(hdmi->wait_event,
hdmi->event_received == true,
msecs_to_jiffies
(HDMI_TIMEOUT_PLL_LOCK));
if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_DLL_LCK) == 0) {
DRM_ERROR("hdmi phy pll not locked\n");
goto err;
}
DRM_DEBUG_DRIVER("got PHY PLL Lock\n");
/*
* To configure the source termination and pre-emphasis appropriately
* for different high speed TMDS clock frequencies a phy configuration
* table must be provided, tailored to the SoC and board combination.
*/
for (i = 0; i < NB_HDMI_PHY_CONFIG; i++) {
if ((hdmiphy_config[i].min_tmds_freq <= tmdsck) &&
(hdmiphy_config[i].max_tmds_freq >= tmdsck)) {
val = hdmiphy_config[i].config[0];
hdmi_write(hdmi, val, HDMI_SRZ_TAP_1);
val = hdmiphy_config[i].config[1];
hdmi_write(hdmi, val, HDMI_SRZ_TAP_2);
val = hdmiphy_config[i].config[2];
hdmi_write(hdmi, val, HDMI_SRZ_TAP_3);
val = hdmiphy_config[i].config[3];
val |= HDMI_SRZ_CTRL_EXTERNAL_DATA_EN;
val &= ~HDMI_SRZ_CTRL_POWER_DOWN;
hdmi_write(hdmi, val, HDMI_SRZ_CTRL);
DRM_DEBUG_DRIVER("serializer cfg 0x%x 0x%x 0x%x 0x%x\n",
hdmiphy_config[i].config[0],
hdmiphy_config[i].config[1],
hdmiphy_config[i].config[2],
hdmiphy_config[i].config[3]);
return true;
}
}
/*
* Default, power up the serializer with no pre-emphasis or source
* termination.
*/
hdmi_write(hdmi, 0x0, HDMI_SRZ_TAP_1);
hdmi_write(hdmi, 0x0, HDMI_SRZ_TAP_2);
hdmi_write(hdmi, 0x0, HDMI_SRZ_TAP_3);
hdmi_write(hdmi, HDMI_SRZ_CTRL_EXTERNAL_DATA_EN, HDMI_SRZ_CTRL);
return true;
err:
disable_pll_rejection(hdmi);
return false;
}
/**
* Stop hdmi phy macro cell tx3g0c55
*
* @hdmi: pointer on the hdmi internal structure
*/
static void sti_hdmi_tx3g0c55phy_stop(struct sti_hdmi *hdmi)
{
DRM_DEBUG_DRIVER("\n");
hdmi->event_received = false;
hdmi_write(hdmi, HDMI_SRZ_CTRL_POWER_DOWN, HDMI_SRZ_CTRL);
hdmi_write(hdmi, HDMI_SRZ_PLL_CFG_POWER_DOWN, HDMI_SRZ_PLL_CFG);
/* wait PLL interrupt */
wait_event_interruptible_timeout(hdmi->wait_event,
hdmi->event_received == true,
msecs_to_jiffies
(HDMI_TIMEOUT_PLL_LOCK));
if (hdmi_read(hdmi, HDMI_STA) & HDMI_STA_DLL_LCK)
DRM_ERROR("hdmi phy pll not well disabled\n");
disable_pll_rejection(hdmi);
}
struct hdmi_phy_ops tx3g0c55phy_ops = {
.start = sti_hdmi_tx3g0c55phy_start,
.stop = sti_hdmi_tx3g0c55phy_stop,
};