// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: Jie Qiu <[email protected]>
*/
#include "phy-mtk-hdmi.h"
#include "phy-mtk-io.h"
#define HDMI_CON0 0x00
#define RG_HDMITX_PLL_EN BIT(31)
#define RG_HDMITX_PLL_FBKDIV GENMASK(30, 24)
#define RG_HDMITX_PLL_FBKSEL GENMASK(23, 22)
#define RG_HDMITX_PLL_PREDIV GENMASK(21, 20)
#define RG_HDMITX_PLL_POSDIV GENMASK(19, 18)
#define RG_HDMITX_PLL_RST_DLY GENMASK(17, 16)
#define RG_HDMITX_PLL_IR GENMASK(15, 12)
#define RG_HDMITX_PLL_IC GENMASK(11, 8)
#define RG_HDMITX_PLL_BP GENMASK(7, 4)
#define RG_HDMITX_PLL_BR GENMASK(3, 2)
#define RG_HDMITX_PLL_BC GENMASK(1, 0)
#define HDMI_CON1 0x04
#define RG_HDMITX_PLL_DIVEN GENMASK(31, 29)
#define RG_HDMITX_PLL_AUTOK_EN BIT(28)
#define RG_HDMITX_PLL_AUTOK_KF GENMASK(27, 26)
#define RG_HDMITX_PLL_AUTOK_KS GENMASK(25, 24)
#define RG_HDMITX_PLL_AUTOK_LOAD BIT(23)
#define RG_HDMITX_PLL_BAND GENMASK(21, 16)
#define RG_HDMITX_PLL_REF_SEL BIT(15)
#define RG_HDMITX_PLL_BIAS_EN BIT(14)
#define RG_HDMITX_PLL_BIAS_LPF_EN BIT(13)
#define RG_HDMITX_PLL_TXDIV_EN BIT(12)
#define RG_HDMITX_PLL_TXDIV GENMASK(11, 10)
#define RG_HDMITX_PLL_LVROD_EN BIT(9)
#define RG_HDMITX_PLL_MONVC_EN BIT(8)
#define RG_HDMITX_PLL_MONCK_EN BIT(7)
#define RG_HDMITX_PLL_MONREF_EN BIT(6)
#define RG_HDMITX_PLL_TST_EN BIT(5)
#define RG_HDMITX_PLL_TST_CK_EN BIT(4)
#define RG_HDMITX_PLL_TST_SEL GENMASK(3, 0)
#define HDMI_CON2 0x08
#define RGS_HDMITX_PLL_AUTOK_BAND GENMASK(14, 8)
#define RGS_HDMITX_PLL_AUTOK_FAIL BIT(1)
#define RG_HDMITX_EN_TX_CKLDO BIT(0)
#define HDMI_CON3 0x0c
#define RG_HDMITX_SER_EN GENMASK(31, 28)
#define RG_HDMITX_PRD_EN GENMASK(27, 24)
#define RG_HDMITX_PRD_IMP_EN GENMASK(23, 20)
#define RG_HDMITX_DRV_EN GENMASK(19, 16)
#define RG_HDMITX_DRV_IMP_EN GENMASK(15, 12)
#define RG_HDMITX_MHLCK_FORCE BIT(10)
#define RG_HDMITX_MHLCK_PPIX_EN BIT(9)
#define RG_HDMITX_MHLCK_EN BIT(8)
#define RG_HDMITX_SER_DIN_SEL GENMASK(7, 4)
#define RG_HDMITX_SER_5T1_BIST_EN BIT(3)
#define RG_HDMITX_SER_BIST_TOG BIT(2)
#define RG_HDMITX_SER_DIN_TOG BIT(1)
#define RG_HDMITX_SER_CLKDIG_INV BIT(0)
#define HDMI_CON4 0x10
#define RG_HDMITX_PRD_IBIAS_CLK GENMASK(27, 24)
#define RG_HDMITX_PRD_IBIAS_D2 GENMASK(19, 16)
#define RG_HDMITX_PRD_IBIAS_D1 GENMASK(11, 8)
#define RG_HDMITX_PRD_IBIAS_D0 GENMASK(3, 0)
#define HDMI_CON5 0x14
#define RG_HDMITX_DRV_IBIAS_CLK GENMASK(29, 24)
#define RG_HDMITX_DRV_IBIAS_D2 GENMASK(21, 16)
#define RG_HDMITX_DRV_IBIAS_D1 GENMASK(13, 8)
#define RG_HDMITX_DRV_IBIAS_D0 GENMASK(5, 0)
#define HDMI_CON6 0x18
#define RG_HDMITX_DRV_IMP_CLK GENMASK(29, 24)
#define RG_HDMITX_DRV_IMP_D2 GENMASK(21, 16)
#define RG_HDMITX_DRV_IMP_D1 GENMASK(13, 8)
#define RG_HDMITX_DRV_IMP_D0 GENMASK(5, 0)
#define HDMI_CON7 0x1c
#define RG_HDMITX_MHLCK_DRV_IBIAS GENMASK(31, 27)
#define RG_HDMITX_SER_DIN GENMASK(25, 16)
#define RG_HDMITX_CHLDC_TST GENMASK(15, 12)
#define RG_HDMITX_CHLCK_TST GENMASK(11, 8)
#define RG_HDMITX_RESERVE GENMASK(7, 0)
#define HDMI_CON8 0x20
#define RGS_HDMITX_2T1_LEV GENMASK(19, 16)
#define RGS_HDMITX_2T1_EDG GENMASK(15, 12)
#define RGS_HDMITX_5T1_LEV GENMASK(11, 8)
#define RGS_HDMITX_5T1_EDG GENMASK(7, 4)
#define RGS_HDMITX_PLUG_TST BIT(0)
static int mtk_hdmi_pll_prepare(struct clk_hw *hw)
{
struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
void __iomem *base = hdmi_phy->regs;
mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_AUTOK_EN);
mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_PLL_POSDIV);
mtk_phy_clear_bits(base + HDMI_CON3, RG_HDMITX_MHLCK_EN);
mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_EN);
usleep_range(100, 150);
mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_PLL_EN);
usleep_range(100, 150);
mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_LPF_EN);
mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_TXDIV_EN);
return 0;
}
static void mtk_hdmi_pll_unprepare(struct clk_hw *hw)
{
struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
void __iomem *base = hdmi_phy->regs;
mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_TXDIV_EN);
mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_LPF_EN);
usleep_range(100, 150);
mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_PLL_EN);
usleep_range(100, 150);
mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_EN);
mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_PLL_POSDIV);
mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_AUTOK_EN);
usleep_range(100, 150);
}
static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
hdmi_phy->pll_rate = rate;
if (rate <= 74250000)
*parent_rate = rate;
else
*parent_rate = rate / 2;
return rate;
}
static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
void __iomem *base = hdmi_phy->regs;
unsigned int pre_div;
unsigned int div;
unsigned int pre_ibias;
unsigned int hdmi_ibias;
unsigned int imp_en;
dev_dbg(hdmi_phy->dev, "%s: %lu Hz, parent: %lu Hz\n", __func__,
rate, parent_rate);
if (rate <= 27000000) {
pre_div = 0;
div = 3;
} else if (rate <= 74250000) {
pre_div = 1;
div = 2;
} else {
pre_div = 1;
div = 1;
}
mtk_phy_update_field(base + HDMI_CON0, RG_HDMITX_PLL_PREDIV, pre_div);
mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_PLL_POSDIV);
mtk_phy_update_bits(base + HDMI_CON0,
RG_HDMITX_PLL_IC | RG_HDMITX_PLL_IR,
FIELD_PREP(RG_HDMITX_PLL_IC, 0x1) |
FIELD_PREP(RG_HDMITX_PLL_IR, 0x1));
mtk_phy_update_field(base + HDMI_CON1, RG_HDMITX_PLL_TXDIV, div);
mtk_phy_update_bits(base + HDMI_CON0,
RG_HDMITX_PLL_FBKSEL | RG_HDMITX_PLL_FBKDIV,
FIELD_PREP(RG_HDMITX_PLL_FBKSEL, 0x1) |
FIELD_PREP(RG_HDMITX_PLL_FBKDIV, 19));
mtk_phy_update_field(base + HDMI_CON1, RG_HDMITX_PLL_DIVEN, 0x2);
mtk_phy_update_bits(base + HDMI_CON0,
RG_HDMITX_PLL_BP | RG_HDMITX_PLL_BC |
RG_HDMITX_PLL_BR,
FIELD_PREP(RG_HDMITX_PLL_BP, 0xc) |
FIELD_PREP(RG_HDMITX_PLL_BC, 0x2) |
FIELD_PREP(RG_HDMITX_PLL_BR, 0x1));
if (rate < 165000000) {
mtk_phy_clear_bits(base + HDMI_CON3, RG_HDMITX_PRD_IMP_EN);
pre_ibias = 0x3;
imp_en = 0x0;
hdmi_ibias = hdmi_phy->ibias;
} else {
mtk_phy_set_bits(base + HDMI_CON3, RG_HDMITX_PRD_IMP_EN);
pre_ibias = 0x6;
imp_en = 0xf;
hdmi_ibias = hdmi_phy->ibias_up;
}
mtk_phy_update_bits(base + HDMI_CON4,
RG_HDMITX_PRD_IBIAS_CLK | RG_HDMITX_PRD_IBIAS_D2 |
RG_HDMITX_PRD_IBIAS_D1 | RG_HDMITX_PRD_IBIAS_D0,
FIELD_PREP(RG_HDMITX_PRD_IBIAS_CLK, pre_ibias) |
FIELD_PREP(RG_HDMITX_PRD_IBIAS_D2, pre_ibias) |
FIELD_PREP(RG_HDMITX_PRD_IBIAS_D1, pre_ibias) |
FIELD_PREP(RG_HDMITX_PRD_IBIAS_D0, pre_ibias));
mtk_phy_update_field(base + HDMI_CON3, RG_HDMITX_DRV_IMP_EN, imp_en);
mtk_phy_update_bits(base + HDMI_CON6,
RG_HDMITX_DRV_IMP_CLK | RG_HDMITX_DRV_IMP_D2 |
RG_HDMITX_DRV_IMP_D1 | RG_HDMITX_DRV_IMP_D0,
FIELD_PREP(RG_HDMITX_DRV_IMP_CLK, hdmi_phy->drv_imp_clk) |
FIELD_PREP(RG_HDMITX_DRV_IMP_D2, hdmi_phy->drv_imp_d2) |
FIELD_PREP(RG_HDMITX_DRV_IMP_D1, hdmi_phy->drv_imp_d1) |
FIELD_PREP(RG_HDMITX_DRV_IMP_D0, hdmi_phy->drv_imp_d0));
mtk_phy_update_bits(base + HDMI_CON5,
RG_HDMITX_DRV_IBIAS_CLK | RG_HDMITX_DRV_IBIAS_D2 |
RG_HDMITX_DRV_IBIAS_D1 | RG_HDMITX_DRV_IBIAS_D0,
FIELD_PREP(RG_HDMITX_DRV_IBIAS_CLK, hdmi_ibias) |
FIELD_PREP(RG_HDMITX_DRV_IBIAS_D2, hdmi_ibias) |
FIELD_PREP(RG_HDMITX_DRV_IBIAS_D1, hdmi_ibias) |
FIELD_PREP(RG_HDMITX_DRV_IBIAS_D0, hdmi_ibias));
return 0;
}
static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
return hdmi_phy->pll_rate;
}
static const struct clk_ops mtk_hdmi_phy_pll_ops = {
.prepare = mtk_hdmi_pll_prepare,
.unprepare = mtk_hdmi_pll_unprepare,
.set_rate = mtk_hdmi_pll_set_rate,
.round_rate = mtk_hdmi_pll_round_rate,
.recalc_rate = mtk_hdmi_pll_recalc_rate,
};
static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy)
{
mtk_phy_set_bits(hdmi_phy->regs + HDMI_CON3,
RG_HDMITX_SER_EN | RG_HDMITX_PRD_EN |
RG_HDMITX_DRV_EN);
usleep_range(100, 150);
}
static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
{
mtk_phy_clear_bits(hdmi_phy->regs + HDMI_CON3,
RG_HDMITX_DRV_EN | RG_HDMITX_PRD_EN |
RG_HDMITX_SER_EN);
}
struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf = {
.flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE,
.hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
.hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
.hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds,
};
MODULE_AUTHOR("Jie Qiu <[email protected]>");
MODULE_DESCRIPTION("MediaTek MT8173 HDMI PHY Driver");
MODULE_LICENSE("GPL v2");
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