--- /dev/null
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <linux/err.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/dp_info.h>
+#include <asm/arch/dp.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+struct exynos_dp *dp_regs;
+
+void exynos_dp_set_base_addr(void)
+{
+#ifdef CONFIG_OF_CONTROL
+ unsigned int node = fdtdec_next_compatible(gd->fdt_blob,
+ 0, COMPAT_SAMSUNG_EXYNOS5_DP);
+ if (node <= 0)
+ debug("exynos_dp: Can't get device node for dp\n");
+
+ dp_regs = (struct exynos_dp *)fdtdec_get_addr(gd->fdt_blob,
+ node, "reg");
+ if (dp_regs == NULL)
+ debug("Can't get the DP base address\n");
+#else
+ dp_regs = (struct exynos_dp *)samsung_get_base_dp();
+#endif
+}
+
+static void exynos_dp_enable_video_input(unsigned int enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->video_ctl1);
+ reg &= ~VIDEO_EN_MASK;
+
+ /* enable video input*/
+ if (enable)
+ reg |= VIDEO_EN_MASK;
+
+ writel(reg, &dp_regs->video_ctl1);
+
+ return;
+}
+
+void exynos_dp_enable_video_bist(unsigned int enable)
+{
+ /*enable video bist*/
+ unsigned int reg;
+
+ reg = readl(&dp_regs->video_ctl4);
+ reg &= ~VIDEO_BIST_MASK;
+
+ /*enable video bist*/
+ if (enable)
+ reg |= VIDEO_BIST_MASK;
+
+ writel(reg, &dp_regs->video_ctl4);
+
+ return;
+}
+
+void exynos_dp_enable_video_mute(unsigned int enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->video_ctl1);
+ reg &= ~(VIDEO_MUTE_MASK);
+ if (enable)
+ reg |= VIDEO_MUTE_MASK;
+
+ writel(reg, &dp_regs->video_ctl1);
+
+ return;
+}
+
+
+static void exynos_dp_init_analog_param(void)
+{
+ unsigned int reg;
+
+ /*
+ * Set termination
+ * Normal bandgap, Normal swing, Tx terminal registor 61 ohm
+ * 24M Phy clock, TX digital logic power is 100:1.0625V
+ */
+ reg = SEL_BG_NEW_BANDGAP | TX_TERMINAL_CTRL_61_OHM |
+ SWING_A_30PER_G_NORMAL;
+ writel(reg, &dp_regs->analog_ctl1);
+
+ reg = SEL_24M | TX_DVDD_BIT_1_0625V;
+ writel(reg, &dp_regs->analog_ctl2);
+
+ /*
+ * Set power source for internal clk driver to 1.0625v.
+ * Select current reference of TX driver current to 00:Ipp/2+Ic/2.
+ * Set VCO range of PLL +- 0uA
+ */
+ reg = DRIVE_DVDD_BIT_1_0625V | SEL_CURRENT_DEFAULT | VCO_BIT_000_MICRO;
+ writel(reg, &dp_regs->analog_ctl3);
+
+ /*
+ * Set AUX TX terminal resistor to 102 ohm
+ * Set AUX channel amplitude control
+ */
+ reg = PD_RING_OSC | AUX_TERMINAL_CTRL_52_OHM | TX_CUR1_2X | TX_CUR_4_MA;
+ writel(reg, &dp_regs->pll_filter_ctl1);
+
+ /*
+ * PLL loop filter bandwidth
+ * For 2.7Gbps: 175KHz, For 1.62Gbps: 234KHz
+ * PLL digital power select: 1.2500V
+ */
+ reg = CH3_AMP_0_MV | CH2_AMP_0_MV | CH1_AMP_0_MV | CH0_AMP_0_MV;
+
+ writel(reg, &dp_regs->amp_tuning_ctl);
+
+ /*
+ * PLL loop filter bandwidth
+ * For 2.7Gbps: 175KHz, For 1.62Gbps: 234KHz
+ * PLL digital power select: 1.1250V
+ */
+ reg = DP_PLL_LOOP_BIT_DEFAULT | DP_PLL_REF_BIT_1_1250V;
+ writel(reg, &dp_regs->pll_ctl);
+}
+
+static void exynos_dp_init_interrupt(void)
+{
+ /* Set interrupt registers to initial states */
+
+ /*
+ * Disable interrupt
+ * INT pin assertion polarity. It must be configured
+ * correctly according to ICU setting.
+ * 1 = assert high, 0 = assert low
+ */
+ writel(INT_POL, &dp_regs->int_ctl);
+
+ /* Clear pending regisers */
+ writel(0xff, &dp_regs->common_int_sta1);
+ writel(0xff, &dp_regs->common_int_sta2);
+ writel(0xff, &dp_regs->common_int_sta3);
+ writel(0xff, &dp_regs->common_int_sta4);
+ writel(0xff, &dp_regs->int_sta);
+
+ /* 0:mask,1: unmask */
+ writel(0x00, &dp_regs->int_sta_mask1);
+ writel(0x00, &dp_regs->int_sta_mask2);
+ writel(0x00, &dp_regs->int_sta_mask3);
+ writel(0x00, &dp_regs->int_sta_mask4);
+ writel(0x00, &dp_regs->int_sta_mask);
+}
+
+void exynos_dp_reset(void)
+{
+ unsigned int reg_func_1;
+
+ /*dp tx sw reset*/
+ writel(RESET_DP_TX, &dp_regs->tx_sw_reset);
+
+ exynos_dp_enable_video_input(DP_DISABLE);
+ exynos_dp_enable_video_bist(DP_DISABLE);
+ exynos_dp_enable_video_mute(DP_DISABLE);
+
+ /* software reset */
+ reg_func_1 = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
+ AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
+ HDCP_FUNC_EN_N | SW_FUNC_EN_N;
+
+ writel(reg_func_1, &dp_regs->func_en1);
+ writel(reg_func_1, &dp_regs->func_en2);
+
+ mdelay(1);
+
+ exynos_dp_init_analog_param();
+ exynos_dp_init_interrupt();
+
+ return;
+}
+
+void exynos_dp_enable_sw_func(unsigned int enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->func_en1);
+ reg &= ~(SW_FUNC_EN_N);
+
+ if (!enable)
+ reg |= SW_FUNC_EN_N;
+
+ writel(reg, &dp_regs->func_en1);
+
+ return;
+}
+
+unsigned int exynos_dp_set_analog_power_down(unsigned int block, u32 enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->phy_pd);
+ switch (block) {
+ case AUX_BLOCK:
+ reg &= ~(AUX_PD);
+ if (enable)
+ reg |= AUX_PD;
+ break;
+ case CH0_BLOCK:
+ reg &= ~(CH0_PD);
+ if (enable)
+ reg |= CH0_PD;
+ break;
+ case CH1_BLOCK:
+ reg &= ~(CH1_PD);
+ if (enable)
+ reg |= CH1_PD;
+ break;
+ case CH2_BLOCK:
+ reg &= ~(CH2_PD);
+ if (enable)
+ reg |= CH2_PD;
+ break;
+ case CH3_BLOCK:
+ reg &= ~(CH3_PD);
+ if (enable)
+ reg |= CH3_PD;
+ break;
+ case ANALOG_TOTAL:
+ reg &= ~PHY_PD;
+ if (enable)
+ reg |= PHY_PD;
+ break;
+ case POWER_ALL:
+ reg &= ~(PHY_PD | AUX_PD | CH0_PD | CH1_PD | CH2_PD |
+ CH3_PD);
+ if (enable)
+ reg |= (PHY_PD | AUX_PD | CH0_PD | CH1_PD |
+ CH2_PD | CH3_PD);
+ break;
+ default:
+ printf("DP undefined block number : %d\n", block);
+ return -1;
+ }
+
+ writel(reg, &dp_regs->phy_pd);
+
+ return 0;
+}
+
+unsigned int exynos_dp_get_pll_lock_status(void)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->debug_ctl);
+
+ if (reg & PLL_LOCK)
+ return PLL_LOCKED;
+ else
+ return PLL_UNLOCKED;
+}
+
+static void exynos_dp_set_pll_power(unsigned int enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->pll_ctl);
+ reg &= ~(DP_PLL_PD);
+
+ if (!enable)
+ reg |= DP_PLL_PD;
+
+ writel(reg, &dp_regs->pll_ctl);
+}
+
+int exynos_dp_init_analog_func(void)
+{
+ int ret = EXYNOS_DP_SUCCESS;
+ unsigned int retry_cnt = 10;
+ unsigned int reg;
+
+ /*Power On All Analog block */
+ exynos_dp_set_analog_power_down(POWER_ALL, DP_DISABLE);
+
+ reg = PLL_LOCK_CHG;
+ writel(reg, &dp_regs->common_int_sta1);
+
+ reg = readl(&dp_regs->debug_ctl);
+ reg &= ~(F_PLL_LOCK | PLL_LOCK_CTRL);
+ writel(reg, &dp_regs->debug_ctl);
+
+ /*Assert DP PLL Reset*/
+ reg = readl(&dp_regs->pll_ctl);
+ reg |= DP_PLL_RESET;
+ writel(reg, &dp_regs->pll_ctl);
+
+ mdelay(1);
+
+ /*Deassert DP PLL Reset*/
+ reg = readl(&dp_regs->pll_ctl);
+ reg &= ~(DP_PLL_RESET);
+ writel(reg, &dp_regs->pll_ctl);
+
+ exynos_dp_set_pll_power(DP_ENABLE);
+
+ while (exynos_dp_get_pll_lock_status() == PLL_UNLOCKED) {
+ mdelay(1);
+ retry_cnt--;
+ if (retry_cnt == 0) {
+ printf("DP dp's pll lock failed : retry : %d\n",
+ retry_cnt);
+ return -EINVAL;
+ }
+ }
+
+ debug("dp's pll lock success(%d)\n", retry_cnt);
+
+ /* Enable Serdes FIFO function and Link symbol clock domain module */
+ reg = readl(&dp_regs->func_en2);
+ reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
+ | AUX_FUNC_EN_N);
+ writel(reg, &dp_regs->func_en2);
+
+ return ret;
+}
+
+void exynos_dp_init_hpd(void)
+{
+ unsigned int reg;
+
+ /* Clear interrupts releated to Hot Plug Dectect */
+ reg = HOTPLUG_CHG | HPD_LOST | PLUG;
+ writel(reg, &dp_regs->common_int_sta4);
+
+ reg = INT_HPD;
+ writel(reg, &dp_regs->int_sta);
+
+ reg = readl(&dp_regs->sys_ctl3);
+ reg &= ~(F_HPD | HPD_CTRL);
+ writel(reg, &dp_regs->sys_ctl3);
+
+ return;
+}
+
+static inline void exynos_dp_reset_aux(void)
+{
+ unsigned int reg;
+
+ /* Disable AUX channel module */
+ reg = readl(&dp_regs->func_en2);
+ reg |= AUX_FUNC_EN_N;
+ writel(reg, &dp_regs->func_en2);
+
+ return;
+}
+
+void exynos_dp_init_aux(void)
+{
+ unsigned int reg;
+
+ /* Clear inerrupts related to AUX channel */
+ reg = RPLY_RECEIV | AUX_ERR;
+ writel(reg, &dp_regs->int_sta);
+
+ exynos_dp_reset_aux();
+
+ /* Disable AUX transaction H/W retry */
+ reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3) | AUX_HW_RETRY_COUNT_SEL(3)|
+ AUX_HW_RETRY_INTERVAL_600_MICROSECONDS;
+ writel(reg, &dp_regs->aux_hw_retry_ctl);
+
+ /* Receive AUX Channel DEFER commands equal to DEFFER_COUNT*64 */
+ reg = DEFER_CTRL_EN | DEFER_COUNT(1);
+ writel(reg, &dp_regs->aux_ch_defer_ctl);
+
+ /* Enable AUX channel module */
+ reg = readl(&dp_regs->func_en2);
+ reg &= ~AUX_FUNC_EN_N;
+ writel(reg, &dp_regs->func_en2);
+
+ return;
+}
+
+void exynos_dp_config_interrupt(void)
+{
+ unsigned int reg;
+
+ /* 0: mask, 1: unmask */
+ reg = COMMON_INT_MASK_1;
+ writel(reg, &dp_regs->common_int_mask1);
+
+ reg = COMMON_INT_MASK_2;
+ writel(reg, &dp_regs->common_int_mask2);
+
+ reg = COMMON_INT_MASK_3;
+ writel(reg, &dp_regs->common_int_mask3);
+
+ reg = COMMON_INT_MASK_4;
+ writel(reg, &dp_regs->common_int_mask4);
+
+ reg = INT_STA_MASK;
+ writel(reg, &dp_regs->int_sta_mask);
+
+ return;
+}
+
+unsigned int exynos_dp_get_plug_in_status(void)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->sys_ctl3);
+ if (reg & HPD_STATUS)
+ return 0;
+
+ return -1;
+}
+
+unsigned int exynos_dp_detect_hpd(void)
+{
+ int timeout_loop = DP_TIMEOUT_LOOP_COUNT;
+
+ mdelay(2);
+
+ while (exynos_dp_get_plug_in_status() != 0) {
+ if (timeout_loop == 0)
+ return -EINVAL;
+ mdelay(10);
+ timeout_loop--;
+ }
+
+ return EXYNOS_DP_SUCCESS;
+}
+
+unsigned int exynos_dp_start_aux_transaction(void)
+{
+ unsigned int reg;
+ unsigned int ret = 0;
+ unsigned int retry_cnt;
+
+ /* Enable AUX CH operation */
+ reg = readl(&dp_regs->aux_ch_ctl2);
+ reg |= AUX_EN;
+ writel(reg, &dp_regs->aux_ch_ctl2);
+
+ retry_cnt = 10;
+ while (retry_cnt) {
+ reg = readl(&dp_regs->int_sta);
+ if (!(reg & RPLY_RECEIV)) {
+ if (retry_cnt == 0) {
+ printf("DP Reply Timeout!!\n");
+ ret = -EAGAIN;
+ return ret;
+ }
+ mdelay(1);
+ retry_cnt--;
+ } else
+ break;
+ }
+
+ /* Clear interrupt source for AUX CH command reply */
+ writel(reg, &dp_regs->int_sta);
+
+ /* Clear interrupt source for AUX CH access error */
+ reg = readl(&dp_regs->int_sta);
+ if (reg & AUX_ERR) {
+ printf("DP Aux Access Error\n");
+ writel(AUX_ERR, &dp_regs->int_sta);
+ ret = -EAGAIN;
+ return ret;
+ }
+
+ /* Check AUX CH error access status */
+ reg = readl(&dp_regs->aux_ch_sta);
+ if ((reg & AUX_STATUS_MASK) != 0) {
+ debug("DP AUX CH error happens: %x\n", reg & AUX_STATUS_MASK);
+ ret = -EAGAIN;
+ return ret;
+ }
+
+ return EXYNOS_DP_SUCCESS;
+}
+
+unsigned int exynos_dp_write_byte_to_dpcd(unsigned int reg_addr,
+ unsigned char data)
+{
+ unsigned int reg, ret;
+
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, &dp_regs->buffer_data_ctl);
+
+ /* Select DPCD device address */
+ reg = AUX_ADDR_7_0(reg_addr);
+ writel(reg, &dp_regs->aux_addr_7_0);
+ reg = AUX_ADDR_15_8(reg_addr);
+ writel(reg, &dp_regs->aux_addr_15_8);
+ reg = AUX_ADDR_19_16(reg_addr);
+ writel(reg, &dp_regs->aux_addr_19_16);
+
+ /* Write data buffer */
+ reg = (unsigned int)data;
+ writel(reg, &dp_regs->buf_data0);
+
+ /*
+ * Set DisplayPort transaction and write 1 byte
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_WRITE;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ ret = exynos_dp_start_aux_transaction();
+ if (ret != EXYNOS_DP_SUCCESS) {
+ printf("DP Aux transaction failed\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+unsigned int exynos_dp_read_byte_from_dpcd(unsigned int reg_addr,
+ unsigned char *data)
+{
+ unsigned int reg;
+ int retval;
+
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, &dp_regs->buffer_data_ctl);
+
+ /* Select DPCD device address */
+ reg = AUX_ADDR_7_0(reg_addr);
+ writel(reg, &dp_regs->aux_addr_7_0);
+ reg = AUX_ADDR_15_8(reg_addr);
+ writel(reg, &dp_regs->aux_addr_15_8);
+ reg = AUX_ADDR_19_16(reg_addr);
+ writel(reg, &dp_regs->aux_addr_19_16);
+
+ /*
+ * Set DisplayPort transaction and read 1 byte
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_READ;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ retval = exynos_dp_start_aux_transaction();
+ if (!retval)
+ debug("DP Aux Transaction fail!\n");
+
+ /* Read data buffer */
+ reg = readl(&dp_regs->buf_data0);
+ *data = (unsigned char)(reg & 0xff);
+
+ return retval;
+}
+
+unsigned int exynos_dp_write_bytes_to_dpcd(unsigned int reg_addr,
+ unsigned int count,
+ unsigned char data[])
+{
+ unsigned int reg;
+ unsigned int start_offset;
+ unsigned int cur_data_count;
+ unsigned int cur_data_idx;
+ unsigned int retry_cnt;
+ unsigned int ret = 0;
+
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, &dp_regs->buffer_data_ctl);
+
+ start_offset = 0;
+ while (start_offset < count) {
+ /* Buffer size of AUX CH is 16 * 4bytes */
+ if ((count - start_offset) > 16)
+ cur_data_count = 16;
+ else
+ cur_data_count = count - start_offset;
+
+ retry_cnt = 5;
+ while (retry_cnt) {
+ /* Select DPCD device address */
+ reg = AUX_ADDR_7_0(reg_addr + start_offset);
+ writel(reg, &dp_regs->aux_addr_7_0);
+ reg = AUX_ADDR_15_8(reg_addr + start_offset);
+ writel(reg, &dp_regs->aux_addr_15_8);
+ reg = AUX_ADDR_19_16(reg_addr + start_offset);
+ writel(reg, &dp_regs->aux_addr_19_16);
+
+ for (cur_data_idx = 0; cur_data_idx < cur_data_count;
+ cur_data_idx++) {
+ reg = data[start_offset + cur_data_idx];
+ writel(reg, (unsigned int)&dp_regs->buf_data0 +
+ (4 * cur_data_idx));
+ }
+ /*
+ * Set DisplayPort transaction and write
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_LENGTH(cur_data_count) |
+ AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_WRITE;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ ret = exynos_dp_start_aux_transaction();
+ if (ret != EXYNOS_DP_SUCCESS) {
+ if (retry_cnt == 0) {
+ printf("DP Aux Transaction failed\n");
+ return ret;
+ }
+ retry_cnt--;
+ } else
+ break;
+ }
+ start_offset += cur_data_count;
+ }
+
+ return ret;
+}
+
+unsigned int exynos_dp_read_bytes_from_dpcd(unsigned int reg_addr,
+ unsigned int count,
+ unsigned char data[])
+{
+ unsigned int reg;
+ unsigned int start_offset;
+ unsigned int cur_data_count;
+ unsigned int cur_data_idx;
+ unsigned int retry_cnt;
+ unsigned int ret = 0;
+
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, &dp_regs->buffer_data_ctl);
+
+ start_offset = 0;
+ while (start_offset < count) {
+ /* Buffer size of AUX CH is 16 * 4bytes */
+ if ((count - start_offset) > 16)
+ cur_data_count = 16;
+ else
+ cur_data_count = count - start_offset;
+
+ retry_cnt = 5;
+ while (retry_cnt) {
+ /* Select DPCD device address */
+ reg = AUX_ADDR_7_0(reg_addr + start_offset);
+ writel(reg, &dp_regs->aux_addr_7_0);
+ reg = AUX_ADDR_15_8(reg_addr + start_offset);
+ writel(reg, &dp_regs->aux_addr_15_8);
+ reg = AUX_ADDR_19_16(reg_addr + start_offset);
+ writel(reg, &dp_regs->aux_addr_19_16);
+ /*
+ * Set DisplayPort transaction and read
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_LENGTH(cur_data_count) |
+ AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_READ;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ ret = exynos_dp_start_aux_transaction();
+ if (ret != EXYNOS_DP_SUCCESS) {
+ if (retry_cnt == 0) {
+ printf("DP Aux Transaction failed\n");
+ return ret;
+ }
+ retry_cnt--;
+ } else
+ break;
+ }
+
+ for (cur_data_idx = 0; cur_data_idx < cur_data_count;
+ cur_data_idx++) {
+ reg = readl((unsigned int)&dp_regs->buf_data0 +
+ 4 * cur_data_idx);
+ data[start_offset + cur_data_idx] = (unsigned char)reg;
+ }
+
+ start_offset += cur_data_count;
+ }
+
+ return ret;
+}
+
+int exynos_dp_select_i2c_device(unsigned int device_addr,
+ unsigned int reg_addr)
+{
+ unsigned int reg;
+ int retval;
+
+ /* Set EDID device address */
+ reg = device_addr;
+ writel(reg, &dp_regs->aux_addr_7_0);
+ writel(0x0, &dp_regs->aux_addr_15_8);
+ writel(0x0, &dp_regs->aux_addr_19_16);
+
+ /* Set offset from base address of EDID device */
+ writel(reg_addr, &dp_regs->buf_data0);
+
+ /*
+ * Set I2C transaction and write address
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_TX_COMM_I2C_TRANSACTION | AUX_TX_COMM_MOT |
+ AUX_TX_COMM_WRITE;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ retval = exynos_dp_start_aux_transaction();
+ if (retval != 0)
+ printf("%s: DP Aux Transaction fail!\n", __func__);
+
+ return retval;
+}
+
+int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
+ unsigned int reg_addr,
+ unsigned int *data)
+{
+ unsigned int reg;
+ int i;
+ int retval;
+
+ for (i = 0; i < 10; i++) {
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, &dp_regs->buffer_data_ctl);
+
+ /* Select EDID device */
+ retval = exynos_dp_select_i2c_device(device_addr, reg_addr);
+ if (retval != 0) {
+ printf("DP Select EDID device fail. retry !\n");
+ continue;
+ }
+
+ /*
+ * Set I2C transaction and read data
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_TX_COMM_I2C_TRANSACTION |
+ AUX_TX_COMM_READ;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ retval = exynos_dp_start_aux_transaction();
+ if (retval != EXYNOS_DP_SUCCESS)
+ printf("%s: DP Aux Transaction fail!\n", __func__);
+ }
+
+ /* Read data */
+ if (retval == 0)
+ *data = readl(&dp_regs->buf_data0);
+
+ return retval;
+}
+
+int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
+ unsigned int reg_addr, unsigned int count, unsigned char edid[])
+{
+ unsigned int reg;
+ unsigned int i, j;
+ unsigned int cur_data_idx;
+ unsigned int defer = 0;
+ int retval = 0;
+
+ for (i = 0; i < count; i += 16) { /* use 16 burst */
+ for (j = 0; j < 100; j++) {
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, &dp_regs->buffer_data_ctl);
+
+ /* Set normal AUX CH command */
+ reg = readl(&dp_regs->aux_ch_ctl2);
+ reg &= ~ADDR_ONLY;
+ writel(reg, &dp_regs->aux_ch_ctl2);
+
+ /*
+ * If Rx sends defer, Tx sends only reads
+ * request without sending addres
+ */
+ if (!defer)
+ retval =
+ exynos_dp_select_i2c_device(device_addr,
+ reg_addr + i);
+ else
+ defer = 0;
+
+ if (retval == EXYNOS_DP_SUCCESS) {
+ /*
+ * Set I2C transaction and write data
+ * If bit 3 is 1, DisplayPort transaction.
+ * If Bit 3 is 0, I2C transaction.
+ */
+ reg = AUX_LENGTH(16) |
+ AUX_TX_COMM_I2C_TRANSACTION |
+ AUX_TX_COMM_READ;
+ writel(reg, &dp_regs->aux_ch_ctl1);
+
+ /* Start AUX transaction */
+ retval = exynos_dp_start_aux_transaction();
+ if (retval == 0)
+ break;
+ else
+ printf("DP Aux Transaction fail!\n");
+ }
+ /* Check if Rx sends defer */
+ reg = readl(&dp_regs->aux_rx_comm);
+ if (reg == AUX_RX_COMM_AUX_DEFER ||
+ reg == AUX_RX_COMM_I2C_DEFER) {
+ printf("DP Defer: %d\n\n", reg);
+ defer = 1;
+ }
+ }
+
+ for (cur_data_idx = 0; cur_data_idx < 16; cur_data_idx++) {
+ reg = readl((unsigned int)&dp_regs->buf_data0
+ + 4 * cur_data_idx);
+ edid[i + cur_data_idx] = (unsigned char)reg;
+ }
+ }
+
+ return retval;
+}
+
+void exynos_dp_reset_macro(void)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->phy_test);
+ reg |= MACRO_RST;
+ writel(reg, &dp_regs->phy_test);
+
+ /* 10 us is the minimum Macro reset time. */
+ mdelay(1);
+
+ reg &= ~MACRO_RST;
+ writel(reg, &dp_regs->phy_test);
+}
+
+void exynos_dp_set_link_bandwidth(unsigned char bwtype)
+{
+ unsigned int reg;
+
+ reg = (unsigned int)bwtype;
+
+ /* Set bandwidth to 2.7G or 1.62G */
+ if ((bwtype == DP_LANE_BW_1_62) || (bwtype == DP_LANE_BW_2_70))
+ writel(reg, &dp_regs->link_bw_set);
+}
+
+unsigned char exynos_dp_get_link_bandwidth(void)
+{
+ unsigned char ret;
+ unsigned int reg;
+
+ reg = readl(&dp_regs->link_bw_set);
+ ret = (unsigned char)reg;
+
+ return ret;
+}
+
+void exynos_dp_set_lane_count(unsigned char count)
+{
+ unsigned int reg;
+
+ reg = (unsigned int)count;
+
+ if ((count == DP_LANE_CNT_1) || (count == DP_LANE_CNT_2) ||
+ (count == DP_LANE_CNT_4))
+ writel(reg, &dp_regs->lane_count_set);
+}
+
+unsigned int exynos_dp_get_lane_count(void)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->lane_count_set);
+
+ return reg;
+}
+
+unsigned char exynos_dp_get_lanex_pre_emphasis(unsigned char lanecnt)
+{
+ unsigned int reg_list[DP_LANE_CNT_4] = {
+ (unsigned int)&dp_regs->ln0_link_training_ctl,
+ (unsigned int)&dp_regs->ln1_link_training_ctl,
+ (unsigned int)&dp_regs->ln2_link_training_ctl,
+ (unsigned int)&dp_regs->ln3_link_training_ctl,
+ };
+
+ return readl(reg_list[lanecnt]);
+}
+
+void exynos_dp_set_lanex_pre_emphasis(unsigned char request_val,
+ unsigned char lanecnt)
+{
+ unsigned int reg_list[DP_LANE_CNT_4] = {
+ (unsigned int)&dp_regs->ln0_link_training_ctl,
+ (unsigned int)&dp_regs->ln1_link_training_ctl,
+ (unsigned int)&dp_regs->ln2_link_training_ctl,
+ (unsigned int)&dp_regs->ln3_link_training_ctl,
+ };
+
+ writel(request_val, reg_list[lanecnt]);
+}
+
+void exynos_dp_set_lane_pre_emphasis(unsigned int level, unsigned char lanecnt)
+{
+ unsigned char i;
+ unsigned int reg;
+ unsigned int reg_list[DP_LANE_CNT_4] = {
+ (unsigned int)&dp_regs->ln0_link_training_ctl,
+ (unsigned int)&dp_regs->ln1_link_training_ctl,
+ (unsigned int)&dp_regs->ln2_link_training_ctl,
+ (unsigned int)&dp_regs->ln3_link_training_ctl,
+ };
+ unsigned int reg_shift[DP_LANE_CNT_4] = {
+ PRE_EMPHASIS_SET_0_SHIFT,
+ PRE_EMPHASIS_SET_1_SHIFT,
+ PRE_EMPHASIS_SET_2_SHIFT,
+ PRE_EMPHASIS_SET_3_SHIFT
+ };
+
+ for (i = 0; i < lanecnt; i++) {
+ reg = level << reg_shift[i];
+ writel(reg, reg_list[i]);
+ }
+}
+
+void exynos_dp_set_training_pattern(unsigned int pattern)
+{
+ unsigned int reg = 0;
+
+ switch (pattern) {
+ case PRBS7:
+ reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_PRBS7;
+ break;
+ case D10_2:
+ reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_D10_2;
+ break;
+ case TRAINING_PTN1:
+ reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN1;
+ break;
+ case TRAINING_PTN2:
+ reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN2;
+ break;
+ case DP_NONE:
+ reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_DISABLE |
+ SW_TRAINING_PATTERN_SET_NORMAL;
+ break;
+ default:
+ break;
+ }
+
+ writel(reg, &dp_regs->training_ptn_set);
+}
+
+void exynos_dp_enable_enhanced_mode(unsigned char enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->sys_ctl4);
+ reg &= ~ENHANCED;
+
+ if (enable)
+ reg |= ENHANCED;
+
+ writel(reg, &dp_regs->sys_ctl4);
+}
+
+void exynos_dp_enable_scrambling(unsigned int enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->training_ptn_set);
+ reg &= ~(SCRAMBLING_DISABLE);
+
+ if (!enable)
+ reg |= SCRAMBLING_DISABLE;
+
+ writel(reg, &dp_regs->training_ptn_set);
+}
+
+int exynos_dp_init_video(void)
+{
+ unsigned int reg;
+
+ /* Clear VID_CLK_CHG[1] and VID_FORMAT_CHG[3] and VSYNC_DET[7] */
+ reg = VSYNC_DET | VID_FORMAT_CHG | VID_CLK_CHG;
+ writel(reg, &dp_regs->common_int_sta1);
+
+ /* I_STRM__CLK detect : DE_CTL : Auto detect */
+ reg &= ~DET_CTRL;
+ writel(reg, &dp_regs->sys_ctl1);
+
+ return 0;
+}
+
+void exynos_dp_config_video_slave_mode(struct edp_video_info *video_info)
+{
+ unsigned int reg;
+
+ /* Video Slave mode setting */
+ reg = readl(&dp_regs->func_en1);
+ reg &= ~(MASTER_VID_FUNC_EN_N|SLAVE_VID_FUNC_EN_N);
+ reg |= MASTER_VID_FUNC_EN_N;
+ writel(reg, &dp_regs->func_en1);
+
+ /* Configure Interlaced for slave mode video */
+ reg = readl(&dp_regs->video_ctl10);
+ reg &= ~INTERACE_SCAN_CFG;
+ reg |= (video_info->interlaced << INTERACE_SCAN_CFG_SHIFT);
+ writel(reg, &dp_regs->video_ctl10);
+
+ /* Configure V sync polarity for slave mode video */
+ reg = readl(&dp_regs->video_ctl10);
+ reg &= ~VSYNC_POLARITY_CFG;
+ reg |= (video_info->v_sync_polarity << V_S_POLARITY_CFG_SHIFT);
+ writel(reg, &dp_regs->video_ctl10);
+
+ /* Configure H sync polarity for slave mode video */
+ reg = readl(&dp_regs->video_ctl10);
+ reg &= ~HSYNC_POLARITY_CFG;
+ reg |= (video_info->h_sync_polarity << H_S_POLARITY_CFG_SHIFT);
+ writel(reg, &dp_regs->video_ctl10);
+
+ /*Set video mode to slave mode */
+ reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
+ writel(reg, &dp_regs->soc_general_ctl);
+}
+
+void exynos_dp_set_video_color_format(struct edp_video_info *video_info)
+{
+ unsigned int reg;
+
+ /* Configure the input color depth, color space, dynamic range */
+ reg = (video_info->dynamic_range << IN_D_RANGE_SHIFT) |
+ (video_info->color_depth << IN_BPC_SHIFT) |
+ (video_info->color_space << IN_COLOR_F_SHIFT);
+ writel(reg, &dp_regs->video_ctl2);
+
+ /* Set Input Color YCbCr Coefficients to ITU601 or ITU709 */
+ reg = readl(&dp_regs->video_ctl3);
+ reg &= ~IN_YC_COEFFI_MASK;
+ if (video_info->ycbcr_coeff)
+ reg |= IN_YC_COEFFI_ITU709;
+ else
+ reg |= IN_YC_COEFFI_ITU601;
+ writel(reg, &dp_regs->video_ctl3);
+}
+
+int exynos_dp_config_video_bist(struct edp_device_info *edp_info)
+{
+ unsigned int reg;
+ unsigned int bist_type = 0;
+ struct edp_video_info video_info = edp_info->video_info;
+
+ /* For master mode, you don't need to set the video format */
+ if (video_info.master_mode == 0) {
+ writel(TOTAL_LINE_CFG_L(edp_info->disp_info.v_total),
+ &dp_regs->total_ln_cfg_l);
+ writel(TOTAL_LINE_CFG_H(edp_info->disp_info.v_total),
+ &dp_regs->total_ln_cfg_h);
+ writel(ACTIVE_LINE_CFG_L(edp_info->disp_info.v_res),
+ &dp_regs->active_ln_cfg_l);
+ writel(ACTIVE_LINE_CFG_H(edp_info->disp_info.v_res),
+ &dp_regs->active_ln_cfg_h);
+ writel(edp_info->disp_info.v_sync_width,
+ &dp_regs->vsw_cfg);
+ writel(edp_info->disp_info.v_back_porch,
+ &dp_regs->vbp_cfg);
+ writel(edp_info->disp_info.v_front_porch,
+ &dp_regs->vfp_cfg);
+
+ writel(TOTAL_PIXEL_CFG_L(edp_info->disp_info.h_total),
+ &dp_regs->total_pix_cfg_l);
+ writel(TOTAL_PIXEL_CFG_H(edp_info->disp_info.h_total),
+ &dp_regs->total_pix_cfg_h);
+ writel(ACTIVE_PIXEL_CFG_L(edp_info->disp_info.h_res),
+ &dp_regs->active_pix_cfg_l);
+ writel(ACTIVE_PIXEL_CFG_H(edp_info->disp_info.h_res),
+ &dp_regs->active_pix_cfg_h);
+ writel(H_F_PORCH_CFG_L(edp_info->disp_info.h_front_porch),
+ &dp_regs->hfp_cfg_l);
+ writel(H_F_PORCH_CFG_H(edp_info->disp_info.h_front_porch),
+ &dp_regs->hfp_cfg_h);
+ writel(H_SYNC_PORCH_CFG_L(edp_info->disp_info.h_sync_width),
+ &dp_regs->hsw_cfg_l);
+ writel(H_SYNC_PORCH_CFG_H(edp_info->disp_info.h_sync_width),
+ &dp_regs->hsw_cfg_h);
+ writel(H_B_PORCH_CFG_L(edp_info->disp_info.h_back_porch),
+ &dp_regs->hbp_cfg_l);
+ writel(H_B_PORCH_CFG_H(edp_info->disp_info.h_back_porch),
+ &dp_regs->hbp_cfg_h);
+
+ /*
+ * Set SLAVE_I_SCAN_CFG[2], VSYNC_P_CFG[1],
+ * HSYNC_P_CFG[0] properly
+ */
+ reg = (video_info.interlaced << INTERACE_SCAN_CFG_SHIFT |
+ video_info.v_sync_polarity << V_S_POLARITY_CFG_SHIFT |
+ video_info.h_sync_polarity << H_S_POLARITY_CFG_SHIFT);
+ writel(reg, &dp_regs->video_ctl10);
+ }
+
+ /* BIST color bar width set--set to each bar is 32 pixel width */
+ switch (video_info.bist_pattern) {
+ case COLORBAR_32:
+ bist_type = BIST_WIDTH_BAR_32_PIXEL |
+ BIST_TYPE_COLOR_BAR;
+ break;
+ case COLORBAR_64:
+ bist_type = BIST_WIDTH_BAR_64_PIXEL |
+ BIST_TYPE_COLOR_BAR;
+ break;
+ case WHITE_GRAY_BALCKBAR_32:
+ bist_type = BIST_WIDTH_BAR_32_PIXEL |
+ BIST_TYPE_WHITE_GRAY_BLACK_BAR;
+ break;
+ case WHITE_GRAY_BALCKBAR_64:
+ bist_type = BIST_WIDTH_BAR_64_PIXEL |
+ BIST_TYPE_WHITE_GRAY_BLACK_BAR;
+ break;
+ case MOBILE_WHITEBAR_32:
+ bist_type = BIST_WIDTH_BAR_32_PIXEL |
+ BIST_TYPE_MOBILE_WHITE_BAR;
+ break;
+ case MOBILE_WHITEBAR_64:
+ bist_type = BIST_WIDTH_BAR_64_PIXEL |
+ BIST_TYPE_MOBILE_WHITE_BAR;
+ break;
+ default:
+ return -1;
+ }
+
+ reg = bist_type;
+ writel(reg, &dp_regs->video_ctl4);
+
+ return 0;
+}
+
+unsigned int exynos_dp_is_slave_video_stream_clock_on(void)
+{
+ unsigned int reg;
+
+ /* Update Video stream clk detect status */
+ reg = readl(&dp_regs->sys_ctl1);
+ writel(reg, &dp_regs->sys_ctl1);
+
+ reg = readl(&dp_regs->sys_ctl1);
+
+ if (!(reg & DET_STA)) {
+ debug("DP Input stream clock not detected.\n");
+ return -EIO;
+ }
+
+ return EXYNOS_DP_SUCCESS;
+}
+
+void exynos_dp_set_video_cr_mn(unsigned int type, unsigned int m_value,
+ unsigned int n_value)
+{
+ unsigned int reg;
+
+ if (type == REGISTER_M) {
+ reg = readl(&dp_regs->sys_ctl4);
+ reg |= FIX_M_VID;
+ writel(reg, &dp_regs->sys_ctl4);
+ reg = M_VID0_CFG(m_value);
+ writel(reg, &dp_regs->m_vid0);
+ reg = M_VID1_CFG(m_value);
+ writel(reg, &dp_regs->m_vid1);
+ reg = M_VID2_CFG(m_value);
+ writel(reg, &dp_regs->m_vid2);
+
+ reg = N_VID0_CFG(n_value);
+ writel(reg, &dp_regs->n_vid0);
+ reg = N_VID1_CFG(n_value);
+ writel(reg, &dp_regs->n_vid1);
+ reg = N_VID2_CFG(n_value);
+ writel(reg, &dp_regs->n_vid2);
+ } else {
+ reg = readl(&dp_regs->sys_ctl4);
+ reg &= ~FIX_M_VID;
+ writel(reg, &dp_regs->sys_ctl4);
+ }
+}
+
+void exynos_dp_set_video_timing_mode(unsigned int type)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->video_ctl10);
+ reg &= ~FORMAT_SEL;
+
+ if (type != VIDEO_TIMING_FROM_CAPTURE)
+ reg |= FORMAT_SEL;
+
+ writel(reg, &dp_regs->video_ctl10);
+}
+
+void exynos_dp_enable_video_master(unsigned int enable)
+{
+ unsigned int reg;
+
+ reg = readl(&dp_regs->soc_general_ctl);
+ if (enable) {
+ reg &= ~VIDEO_MODE_MASK;
+ reg |= VIDEO_MASTER_MODE_EN | VIDEO_MODE_MASTER_MODE;
+ } else {
+ reg &= ~VIDEO_MODE_MASK;
+ reg |= VIDEO_MODE_SLAVE_MODE;
+ }
+
+ writel(reg, &dp_regs->soc_general_ctl);
+}
+
+void exynos_dp_start_video(void)
+{
+ unsigned int reg;
+
+ /* Enable Video input and disable Mute */
+ reg = readl(&dp_regs->video_ctl1);
+ reg |= VIDEO_EN;
+ writel(reg, &dp_regs->video_ctl1);
+}
+
+unsigned int exynos_dp_is_video_stream_on(void)
+{
+ unsigned int reg;
+
+ /* Update STRM_VALID */
+ reg = readl(&dp_regs->sys_ctl3);
+ writel(reg, &dp_regs->sys_ctl3);
+
+ reg = readl(&dp_regs->sys_ctl3);
+ if (!(reg & STRM_VALID))
+ return -EIO;
+
+ return EXYNOS_DP_SUCCESS;
+}
Code Review / kvmfornfv.git / blobdiff