phy-mtk-hdmi-mt8173.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: Jie Qiu <jie.qiu@mediatek.com>
*/
#include "phy-mtk-hdmi.h"
#define HDMI_CON0 0x00
#define RG_HDMITX_PLL_EN BIT(31)
#define RG_HDMITX_PLL_FBKDIV (0x7f << 24)
#define PLL_FBKDIV_SHIFT 24
#define RG_HDMITX_PLL_FBKSEL (0x3 << 22)
#define PLL_FBKSEL_SHIFT 22
#define RG_HDMITX_PLL_PREDIV (0x3 << 20)
#define PREDIV_SHIFT 20
#define RG_HDMITX_PLL_POSDIV (0x3 << 18)
#define POSDIV_SHIFT 18
#define RG_HDMITX_PLL_RST_DLY (0x3 << 16)
#define RG_HDMITX_PLL_IR (0xf << 12)
#define PLL_IR_SHIFT 12
#define RG_HDMITX_PLL_IC (0xf << 8)
#define PLL_IC_SHIFT 8
#define RG_HDMITX_PLL_BP (0xf << 4)
#define PLL_BP_SHIFT 4
#define RG_HDMITX_PLL_BR (0x3 << 2)
#define PLL_BR_SHIFT 2
#define RG_HDMITX_PLL_BC (0x3 << 0)
#define PLL_BC_SHIFT 0
#define HDMI_CON1 0x04
#define RG_HDMITX_PLL_DIVEN (0x7 << 29)
#define PLL_DIVEN_SHIFT 29
#define RG_HDMITX_PLL_AUTOK_EN BIT(28)
#define RG_HDMITX_PLL_AUTOK_KF (0x3 << 26)
#define RG_HDMITX_PLL_AUTOK_KS (0x3 << 24)
#define RG_HDMITX_PLL_AUTOK_LOAD BIT(23)
#define RG_HDMITX_PLL_BAND (0x3f << 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 (0x3 << 10)
#define PLL_TXDIV_SHIFT 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 (0xf << 0)
#define HDMI_CON2 0x08
#define RGS_HDMITX_PLL_AUTOK_BAND (0x7f << 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 (0xf << 28)
#define RG_HDMITX_PRD_EN (0xf << 24)
#define RG_HDMITX_PRD_IMP_EN (0xf << 20)
#define RG_HDMITX_DRV_EN (0xf << 16)
#define RG_HDMITX_DRV_IMP_EN (0xf << 12)
#define DRV_IMP_EN_SHIFT 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 (0xf << 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 (0xf << 24)
#define RG_HDMITX_PRD_IBIAS_D2 (0xf << 16)
#define RG_HDMITX_PRD_IBIAS_D1 (0xf << 8)
#define RG_HDMITX_PRD_IBIAS_D0 (0xf << 0)
#define PRD_IBIAS_CLK_SHIFT 24
#define PRD_IBIAS_D2_SHIFT 16
#define PRD_IBIAS_D1_SHIFT 8
#define PRD_IBIAS_D0_SHIFT 0
#define HDMI_CON5 0x14
#define RG_HDMITX_DRV_IBIAS_CLK (0x3f << 24)
#define RG_HDMITX_DRV_IBIAS_D2 (0x3f << 16)
#define RG_HDMITX_DRV_IBIAS_D1 (0x3f << 8)
#define RG_HDMITX_DRV_IBIAS_D0 (0x3f << 0)
#define DRV_IBIAS_CLK_SHIFT 24
#define DRV_IBIAS_D2_SHIFT 16
#define DRV_IBIAS_D1_SHIFT 8
#define DRV_IBIAS_D0_SHIFT 0
#define HDMI_CON6 0x18
#define RG_HDMITX_DRV_IMP_CLK (0x3f << 24)
#define RG_HDMITX_DRV_IMP_D2 (0x3f << 16)
#define RG_HDMITX_DRV_IMP_D1 (0x3f << 8)
#define RG_HDMITX_DRV_IMP_D0 (0x3f << 0)
#define DRV_IMP_CLK_SHIFT 24
#define DRV_IMP_D2_SHIFT 16
#define DRV_IMP_D1_SHIFT 8
#define DRV_IMP_D0_SHIFT 0
#define HDMI_CON7 0x1c
#define RG_HDMITX_MHLCK_DRV_IBIAS (0x1f << 27)
#define RG_HDMITX_SER_DIN (0x3ff << 16)
#define RG_HDMITX_CHLDC_TST (0xf << 12)
#define RG_HDMITX_CHLCK_TST (0xf << 8)
#define RG_HDMITX_RESERVE (0xff << 0)
#define HDMI_CON8 0x20
#define RGS_HDMITX_2T1_LEV (0xf << 16)
#define RGS_HDMITX_2T1_EDG (0xf << 12)
#define RGS_HDMITX_5T1_LEV (0xf << 8)
#define RGS_HDMITX_5T1_EDG (0xf << 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);
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PLL_AUTOK_EN);
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_PLL_POSDIV);
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON3, RG_HDMITX_MHLCK_EN);
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PLL_BIAS_EN);
usleep_range(100, 150);
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_PLL_EN);
usleep_range(100, 150);
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PLL_BIAS_LPF_EN);
mtk_hdmi_phy_set_bits(hdmi_phy, 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);
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PLL_TXDIV_EN);
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PLL_BIAS_LPF_EN);
usleep_range(100, 150);
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_PLL_EN);
usleep_range(100, 150);
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PLL_BIAS_EN);
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_PLL_POSDIV);
mtk_hdmi_phy_clear_bits(hdmi_phy, 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);
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_hdmi_phy_mask(hdmi_phy, HDMI_CON0,
(pre_div << PREDIV_SHIFT), RG_HDMITX_PLL_PREDIV);
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_PLL_POSDIV);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON0,
(0x1 << PLL_IC_SHIFT) | (0x1 << PLL_IR_SHIFT),
RG_HDMITX_PLL_IC | RG_HDMITX_PLL_IR);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON1,
(div << PLL_TXDIV_SHIFT), RG_HDMITX_PLL_TXDIV);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON0,
(0x1 << PLL_FBKSEL_SHIFT) | (19 << PLL_FBKDIV_SHIFT),
RG_HDMITX_PLL_FBKSEL | RG_HDMITX_PLL_FBKDIV);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON1,
(0x2 << PLL_DIVEN_SHIFT), RG_HDMITX_PLL_DIVEN);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON0,
(0xc << PLL_BP_SHIFT) | (0x2 << PLL_BC_SHIFT) |
(0x1 << PLL_BR_SHIFT),
RG_HDMITX_PLL_BP | RG_HDMITX_PLL_BC |
RG_HDMITX_PLL_BR);
if (rate < 165000000) {
mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON3,
RG_HDMITX_PRD_IMP_EN);
pre_ibias = 0x3;
imp_en = 0x0;
hdmi_ibias = hdmi_phy->ibias;
} else {
mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON3,
RG_HDMITX_PRD_IMP_EN);
pre_ibias = 0x6;
imp_en = 0xf;
hdmi_ibias = hdmi_phy->ibias_up;
}
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON4,
(pre_ibias << PRD_IBIAS_CLK_SHIFT) |
(pre_ibias << PRD_IBIAS_D2_SHIFT) |
(pre_ibias << PRD_IBIAS_D1_SHIFT) |
(pre_ibias << PRD_IBIAS_D0_SHIFT),
RG_HDMITX_PRD_IBIAS_CLK |
RG_HDMITX_PRD_IBIAS_D2 |
RG_HDMITX_PRD_IBIAS_D1 |
RG_HDMITX_PRD_IBIAS_D0);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON3,
(imp_en << DRV_IMP_EN_SHIFT),
RG_HDMITX_DRV_IMP_EN);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6,
(hdmi_phy->drv_imp_clk << DRV_IMP_CLK_SHIFT) |
(hdmi_phy->drv_imp_d2 << DRV_IMP_D2_SHIFT) |
(hdmi_phy->drv_imp_d1 << DRV_IMP_D1_SHIFT) |
(hdmi_phy->drv_imp_d0 << DRV_IMP_D0_SHIFT),
RG_HDMITX_DRV_IMP_CLK | RG_HDMITX_DRV_IMP_D2 |
RG_HDMITX_DRV_IMP_D1 | RG_HDMITX_DRV_IMP_D0);
mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON5,
(hdmi_ibias << DRV_IBIAS_CLK_SHIFT) |
(hdmi_ibias << DRV_IBIAS_D2_SHIFT) |
(hdmi_ibias << DRV_IBIAS_D1_SHIFT) |
(hdmi_ibias << DRV_IBIAS_D0_SHIFT),
RG_HDMITX_DRV_IBIAS_CLK |
RG_HDMITX_DRV_IBIAS_D2 |
RG_HDMITX_DRV_IBIAS_D1 |
RG_HDMITX_DRV_IBIAS_D0);
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_hdmi_phy_set_bits(hdmi_phy, 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_hdmi_phy_clear_bits(hdmi_phy, 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 <jie.qiu@mediatek.com>");
MODULE_DESCRIPTION("MediaTek MT8173 HDMI PHY Driver");
MODULE_LICENSE("GPL v2");