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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019 MediaTek Inc.
* Author: jitao.shi <jitao.shi@mediatek.com>
*/
#include "mtk_mipi_tx.h"
#define MIPITX_LANE_CON 0x000c
#define RG_DSI_CPHY_T1DRV_EN BIT(0)
#define RG_DSI_ANA_CK_SEL BIT(1)
#define RG_DSI_PHY_CK_SEL BIT(2)
#define RG_DSI_CPHY_EN BIT(3)
#define RG_DSI_PHYCK_INV_EN BIT(4)
#define RG_DSI_PWR04_EN BIT(5)
#define RG_DSI_BG_LPF_EN BIT(6)
#define RG_DSI_BG_CORE_EN BIT(7)
#define RG_DSI_PAD_TIEL_SEL BIT(8)
#define MIPITX_VOLTAGE_SEL 0x0010
#define RG_DSI_HSTX_LDO_REF_SEL (0xf << 6)
#define MIPITX_PLL_PWR 0x0028
#define MIPITX_PLL_CON0 0x002c
#define MIPITX_PLL_CON1 0x0030
#define MIPITX_PLL_CON2 0x0034
#define MIPITX_PLL_CON3 0x0038
#define MIPITX_PLL_CON4 0x003c
#define RG_DSI_PLL_IBIAS (3 << 10)
#define MIPITX_D2P_RTCODE 0x0100
#define MIPITX_D2_SW_CTL_EN 0x0144
#define MIPITX_D0_SW_CTL_EN 0x0244
#define MIPITX_CK_CKMODE_EN 0x0328
#define DSI_CK_CKMODE_EN BIT(0)
#define MIPITX_CK_SW_CTL_EN 0x0344
#define MIPITX_D1_SW_CTL_EN 0x0444
#define MIPITX_D3_SW_CTL_EN 0x0544
#define DSI_SW_CTL_EN BIT(0)
#define AD_DSI_PLL_SDM_PWR_ON BIT(0)
#define AD_DSI_PLL_SDM_ISO_EN BIT(1)
#define RG_DSI_PLL_EN BIT(4)
#define RG_DSI_PLL_POSDIV (0x7 << 8)
static int mtk_mipi_tx_pll_enable(struct clk_hw *hw)
{
struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
unsigned int txdiv, txdiv0;
u64 pcw;
dev_dbg(mipi_tx->dev, "enable: %u bps\n", mipi_tx->data_rate);
if (mipi_tx->data_rate >= 2000000000) {
txdiv = 1;
txdiv0 = 0;
} else if (mipi_tx->data_rate >= 1000000000) {
txdiv = 2;
txdiv0 = 1;
} else if (mipi_tx->data_rate >= 500000000) {
txdiv = 4;
txdiv0 = 2;
} else if (mipi_tx->data_rate > 250000000) {
txdiv = 8;
txdiv0 = 3;
} else if (mipi_tx->data_rate >= 125000000) {
txdiv = 16;
txdiv0 = 4;
} else {
return -EINVAL;
}
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON4, RG_DSI_PLL_IBIAS);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);
udelay(1);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);
pcw = div_u64(((u64)mipi_tx->data_rate * txdiv) << 24, 26000000);
writel(pcw, mipi_tx->regs + MIPITX_PLL_CON0);
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_POSDIV,
txdiv0 << 8);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);
return 0;
}
static void mtk_mipi_tx_pll_disable(struct clk_hw *hw)
{
struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);
}
static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
return clamp_val(rate, 50000000, 1600000000);
}
static const struct clk_ops mtk_mipi_tx_pll_ops = {
.enable = mtk_mipi_tx_pll_enable,
.disable = mtk_mipi_tx_pll_disable,
.round_rate = mtk_mipi_tx_pll_round_rate,
.set_rate = mtk_mipi_tx_pll_set_rate,
.recalc_rate = mtk_mipi_tx_pll_recalc_rate,
};
static void mtk_mipi_tx_config_calibration_data(struct mtk_mipi_tx *mipi_tx)
{
int i, j;
for (i = 0; i < 5; i++) {
if ((mipi_tx->rt_code[i] & 0x1f) == 0)
mipi_tx->rt_code[i] |= 0x10;
if ((mipi_tx->rt_code[i] >> 5 & 0x1f) == 0)
mipi_tx->rt_code[i] |= 0x10 << 5;
for (j = 0; j < 10; j++)
mtk_mipi_tx_update_bits(mipi_tx,
MIPITX_D2P_RTCODE * (i + 1) + j * 4,
1, mipi_tx->rt_code[i] >> j & 1);
}
}
static void mtk_mipi_tx_power_on_signal(struct phy *phy)
{
struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
/* BG_LPF_EN / BG_CORE_EN */
writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,
mipi_tx->regs + MIPITX_LANE_CON);
usleep_range(30, 100);
writel(RG_DSI_BG_CORE_EN | RG_DSI_BG_LPF_EN,
mipi_tx->regs + MIPITX_LANE_CON);
/* Switch OFF each Lane */
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_update_bits(mipi_tx, MIPITX_VOLTAGE_SEL,
RG_DSI_HSTX_LDO_REF_SEL,
(mipi_tx->mipitx_drive - 3000) / 200 << 6);
mtk_mipi_tx_config_calibration_data(mipi_tx);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_CKMODE_EN, DSI_CK_CKMODE_EN);
}
static void mtk_mipi_tx_power_off_signal(struct phy *phy)
{
struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
/* Switch ON each Lane */
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);
mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);
writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,
mipi_tx->regs + MIPITX_LANE_CON);
writel(RG_DSI_PAD_TIEL_SEL, mipi_tx->regs + MIPITX_LANE_CON);
}
const struct mtk_mipitx_data mt8183_mipitx_data = {
.mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
.mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
.mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
};
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