649 lines
20 KiB
C
649 lines
20 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2016 Allwinnertech Co., Ltd.
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* Copyright (C) 2017-2018 Bootlin
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*
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* Maxime Ripard <maxime.ripard@free-electrons.com>
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*/
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#include <linux/bitops.h>
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/reset.h>
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#include <linux/phy/phy.h>
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#include <linux/phy/phy-mipi-dphy.h>
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#define SUN6I_DPHY_GCTL_REG 0x00
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#define SUN6I_DPHY_GCTL_LANE_NUM(n) ((((n) - 1) & 3) << 4)
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#define SUN6I_DPHY_GCTL_EN BIT(0)
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#define SUN6I_DPHY_TX_CTL_REG 0x04
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#define SUN6I_DPHY_TX_CTL_HS_TX_CLK_CONT BIT(28)
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#define SUN6I_DPHY_RX_CTL_REG 0x08
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#define SUN6I_DPHY_RX_CTL_EN_DBC BIT(31)
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#define SUN6I_DPHY_RX_CTL_RX_CLK_FORCE BIT(24)
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#define SUN6I_DPHY_RX_CTL_RX_D3_FORCE BIT(23)
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#define SUN6I_DPHY_RX_CTL_RX_D2_FORCE BIT(22)
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#define SUN6I_DPHY_RX_CTL_RX_D1_FORCE BIT(21)
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#define SUN6I_DPHY_RX_CTL_RX_D0_FORCE BIT(20)
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#define SUN6I_DPHY_TX_TIME0_REG 0x10
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#define SUN6I_DPHY_TX_TIME0_HS_TRAIL(n) (((n) & 0xff) << 24)
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#define SUN6I_DPHY_TX_TIME0_HS_PREPARE(n) (((n) & 0xff) << 16)
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#define SUN6I_DPHY_TX_TIME0_LP_CLK_DIV(n) ((n) & 0xff)
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#define SUN6I_DPHY_TX_TIME1_REG 0x14
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#define SUN6I_DPHY_TX_TIME1_CLK_POST(n) (((n) & 0xff) << 24)
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#define SUN6I_DPHY_TX_TIME1_CLK_PRE(n) (((n) & 0xff) << 16)
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#define SUN6I_DPHY_TX_TIME1_CLK_ZERO(n) (((n) & 0xff) << 8)
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#define SUN6I_DPHY_TX_TIME1_CLK_PREPARE(n) ((n) & 0xff)
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#define SUN6I_DPHY_TX_TIME2_REG 0x18
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#define SUN6I_DPHY_TX_TIME2_CLK_TRAIL(n) ((n) & 0xff)
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#define SUN6I_DPHY_TX_TIME3_REG 0x1c
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#define SUN6I_DPHY_TX_TIME4_REG 0x20
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#define SUN6I_DPHY_TX_TIME4_HS_TX_ANA1(n) (((n) & 0xff) << 8)
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#define SUN6I_DPHY_TX_TIME4_HS_TX_ANA0(n) ((n) & 0xff)
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#define SUN6I_DPHY_RX_TIME0_REG 0x30
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#define SUN6I_DPHY_RX_TIME0_HS_RX_SYNC(n) (((n) & 0xff) << 24)
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#define SUN6I_DPHY_RX_TIME0_HS_RX_CLK_MISS(n) (((n) & 0xff) << 16)
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#define SUN6I_DPHY_RX_TIME0_LP_RX(n) (((n) & 0xff) << 8)
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#define SUN6I_DPHY_RX_TIME1_REG 0x34
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#define SUN6I_DPHY_RX_TIME1_RX_DLY(n) (((n) & 0xfff) << 20)
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#define SUN6I_DPHY_RX_TIME1_LP_RX_ULPS_WP(n) ((n) & 0xfffff)
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#define SUN6I_DPHY_RX_TIME2_REG 0x38
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#define SUN6I_DPHY_RX_TIME2_HS_RX_ANA1(n) (((n) & 0xff) << 8)
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#define SUN6I_DPHY_RX_TIME2_HS_RX_ANA0(n) ((n) & 0xff)
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#define SUN6I_DPHY_RX_TIME3_REG 0x40
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#define SUN6I_DPHY_RX_TIME3_LPRST_DLY(n) (((n) & 0xffff) << 16)
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#define SUN6I_DPHY_ANA0_REG 0x4c
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#define SUN6I_DPHY_ANA0_REG_PWS BIT(31)
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#define SUN6I_DPHY_ANA0_REG_PWEND BIT(30)
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#define SUN6I_DPHY_ANA0_REG_PWENC BIT(29)
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#define SUN6I_DPHY_ANA0_REG_DMPC BIT(28)
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#define SUN6I_DPHY_ANA0_REG_DMPD(n) (((n) & 0xf) << 24)
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#define SUN6I_DPHY_ANA0_REG_SRXDT(n) (((n) & 0xf) << 20)
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#define SUN6I_DPHY_ANA0_REG_SRXCK(n) (((n) & 0xf) << 16)
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#define SUN6I_DPHY_ANA0_REG_SDIV2 BIT(15)
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#define SUN6I_DPHY_ANA0_REG_SLV(n) (((n) & 7) << 12)
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#define SUN6I_DPHY_ANA0_REG_DEN(n) (((n) & 0xf) << 8)
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#define SUN6I_DPHY_ANA0_REG_PLR(n) (((n) & 0xf) << 4)
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#define SUN6I_DPHY_ANA0_REG_SFB(n) (((n) & 3) << 2)
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#define SUN6I_DPHY_ANA0_REG_RSD BIT(1)
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#define SUN6I_DPHY_ANA0_REG_SELSCK BIT(0)
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#define SUN6I_DPHY_ANA1_REG 0x50
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#define SUN6I_DPHY_ANA1_REG_VTTMODE BIT(31)
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#define SUN6I_DPHY_ANA1_REG_CSMPS(n) (((n) & 3) << 28)
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#define SUN6I_DPHY_ANA1_REG_SVTT(n) (((n) & 0xf) << 24)
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#define SUN6I_DPHY_ANA2_REG 0x54
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#define SUN6I_DPHY_ANA2_EN_P2S_CPU(n) (((n) & 0xf) << 24)
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#define SUN6I_DPHY_ANA2_EN_P2S_CPU_MASK GENMASK(27, 24)
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#define SUN6I_DPHY_ANA2_EN_CK_CPU BIT(4)
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#define SUN6I_DPHY_ANA2_REG_ENIB BIT(1)
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#define SUN6I_DPHY_ANA3_REG 0x58
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#define SUN6I_DPHY_ANA3_EN_VTTD(n) (((n) & 0xf) << 28)
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#define SUN6I_DPHY_ANA3_EN_VTTD_MASK GENMASK(31, 28)
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#define SUN6I_DPHY_ANA3_EN_VTTC BIT(27)
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#define SUN6I_DPHY_ANA3_EN_DIV BIT(26)
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#define SUN6I_DPHY_ANA3_EN_LDOC BIT(25)
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#define SUN6I_DPHY_ANA3_EN_LDOD BIT(24)
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#define SUN6I_DPHY_ANA3_EN_LDOR BIT(18)
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#define SUN6I_DPHY_ANA4_REG 0x5c
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#define SUN6I_DPHY_ANA4_REG_EN_MIPI BIT(31)
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#define SUN6I_DPHY_ANA4_REG_EN_COMTEST BIT(30)
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#define SUN6I_DPHY_ANA4_REG_COMTEST(n) (((n) & 3) << 28)
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#define SUN6I_DPHY_ANA4_REG_IB(n) (((n) & 3) << 25)
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#define SUN6I_DPHY_ANA4_REG_DMPLVC BIT(24)
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#define SUN6I_DPHY_ANA4_REG_DMPLVD(n) (((n) & 0xf) << 20)
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#define SUN6I_DPHY_ANA4_REG_VTT_SET(n) (((n) & 0x7) << 17)
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#define SUN6I_DPHY_ANA4_REG_CKDV(n) (((n) & 0x1f) << 12)
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#define SUN6I_DPHY_ANA4_REG_TMSC(n) (((n) & 3) << 10)
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#define SUN6I_DPHY_ANA4_REG_TMSD(n) (((n) & 3) << 8)
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#define SUN6I_DPHY_ANA4_REG_TXDNSC(n) (((n) & 3) << 6)
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#define SUN6I_DPHY_ANA4_REG_TXDNSD(n) (((n) & 3) << 4)
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#define SUN6I_DPHY_ANA4_REG_TXPUSC(n) (((n) & 3) << 2)
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#define SUN6I_DPHY_ANA4_REG_TXPUSD(n) ((n) & 3)
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#define SUN6I_DPHY_DBG5_REG 0xf4
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#define SUN50I_DPHY_TX_SLEW_REG0 0xf8
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#define SUN50I_DPHY_TX_SLEW_REG1 0xfc
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#define SUN50I_DPHY_TX_SLEW_REG2 0x100
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#define SUN50I_DPHY_PLL_REG0 0x104
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#define SUN50I_DPHY_PLL_REG0_CP36_EN BIT(23)
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#define SUN50I_DPHY_PLL_REG0_LDO_EN BIT(22)
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#define SUN50I_DPHY_PLL_REG0_EN_LVS BIT(21)
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#define SUN50I_DPHY_PLL_REG0_PLL_EN BIT(20)
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#define SUN50I_DPHY_PLL_REG0_P(n) (((n) & 0xf) << 16)
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#define SUN50I_DPHY_PLL_REG0_N(n) (((n) & 0xff) << 8)
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#define SUN50I_DPHY_PLL_REG0_NDET BIT(7)
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#define SUN50I_DPHY_PLL_REG0_TDIV BIT(6)
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#define SUN50I_DPHY_PLL_REG0_M0(n) (((n) & 3) << 4)
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#define SUN50I_DPHY_PLL_REG0_M1(n) ((n) & 0xf)
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#define SUN50I_DPHY_PLL_REG1 0x108
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#define SUN50I_DPHY_PLL_REG1_UNLOCK_MDSEL(n) (((n) & 3) << 14)
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#define SUN50I_DPHY_PLL_REG1_LOCKMDSEL BIT(13)
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#define SUN50I_DPHY_PLL_REG1_LOCKDET_EN BIT(12)
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#define SUN50I_DPHY_PLL_REG1_VSETA(n) (((n) & 0x7) << 9)
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#define SUN50I_DPHY_PLL_REG1_VSETD(n) (((n) & 0x7) << 6)
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#define SUN50I_DPHY_PLL_REG1_LPF_SW BIT(5)
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#define SUN50I_DPHY_PLL_REG1_ICP_SEL(n) (((n) & 3) << 3)
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#define SUN50I_DPHY_PLL_REG1_ATEST_SEL(n) (((n) & 3) << 1)
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#define SUN50I_DPHY_PLL_REG1_TEST_EN BIT(0)
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#define SUN50I_DPHY_PLL_REG2 0x10c
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#define SUN50I_DPHY_PLL_REG2_SDM_EN BIT(31)
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#define SUN50I_DPHY_PLL_REG2_FF_EN BIT(30)
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#define SUN50I_DPHY_PLL_REG2_SS_EN BIT(29)
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#define SUN50I_DPHY_PLL_REG2_SS_FRAC(n) (((n) & 0x1ff) << 20)
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#define SUN50I_DPHY_PLL_REG2_SS_INT(n) (((n) & 0xff) << 12)
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#define SUN50I_DPHY_PLL_REG2_FRAC(n) ((n) & 0xfff)
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#define SUN50I_COMBO_PHY_REG0 0x110
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#define SUN50I_COMBO_PHY_REG0_EN_TEST_COMBOLDO BIT(5)
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#define SUN50I_COMBO_PHY_REG0_EN_TEST_0P8 BIT(4)
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#define SUN50I_COMBO_PHY_REG0_EN_MIPI BIT(3)
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#define SUN50I_COMBO_PHY_REG0_EN_LVDS BIT(2)
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#define SUN50I_COMBO_PHY_REG0_EN_COMBOLDO BIT(1)
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#define SUN50I_COMBO_PHY_REG0_EN_CP BIT(0)
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#define SUN50I_COMBO_PHY_REG1 0x114
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#define SUN50I_COMBO_PHY_REG2_REG_VREF1P6(n) (((n) & 0x7) << 4)
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#define SUN50I_COMBO_PHY_REG2_REG_VREF0P8(n) ((n) & 0x7)
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#define SUN50I_COMBO_PHY_REG2 0x118
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#define SUN50I_COMBO_PHY_REG2_HS_STOP_DLY(n) ((n) & 0xff)
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enum sun6i_dphy_direction {
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SUN6I_DPHY_DIRECTION_TX,
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SUN6I_DPHY_DIRECTION_RX,
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};
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struct sun6i_dphy;
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struct sun6i_dphy_variant {
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void (*tx_power_on)(struct sun6i_dphy *dphy);
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bool rx_supported;
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};
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struct sun6i_dphy {
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struct clk *bus_clk;
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struct clk *mod_clk;
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struct regmap *regs;
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struct reset_control *reset;
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struct phy *phy;
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struct phy_configure_opts_mipi_dphy config;
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const struct sun6i_dphy_variant *variant;
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enum sun6i_dphy_direction direction;
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};
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static int sun6i_dphy_init(struct phy *phy)
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{
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struct sun6i_dphy *dphy = phy_get_drvdata(phy);
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reset_control_deassert(dphy->reset);
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clk_prepare_enable(dphy->mod_clk);
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clk_set_rate_exclusive(dphy->mod_clk, 150000000);
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return 0;
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}
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static int sun6i_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
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{
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struct sun6i_dphy *dphy = phy_get_drvdata(phy);
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int ret;
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ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
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if (ret)
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return ret;
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memcpy(&dphy->config, opts, sizeof(dphy->config));
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return 0;
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}
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static void sun6i_a31_mipi_dphy_tx_power_on(struct sun6i_dphy *dphy)
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{
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u8 lanes_mask = GENMASK(dphy->config.lanes - 1, 0);
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regmap_write(dphy->regs, SUN6I_DPHY_ANA0_REG,
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SUN6I_DPHY_ANA0_REG_PWS |
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SUN6I_DPHY_ANA0_REG_DMPC |
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SUN6I_DPHY_ANA0_REG_SLV(7) |
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SUN6I_DPHY_ANA0_REG_DMPD(lanes_mask) |
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SUN6I_DPHY_ANA0_REG_DEN(lanes_mask));
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regmap_write(dphy->regs, SUN6I_DPHY_ANA1_REG,
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SUN6I_DPHY_ANA1_REG_CSMPS(1) |
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SUN6I_DPHY_ANA1_REG_SVTT(7));
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regmap_write(dphy->regs, SUN6I_DPHY_ANA4_REG,
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SUN6I_DPHY_ANA4_REG_CKDV(1) |
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SUN6I_DPHY_ANA4_REG_TMSC(1) |
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SUN6I_DPHY_ANA4_REG_TMSD(1) |
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SUN6I_DPHY_ANA4_REG_TXDNSC(1) |
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SUN6I_DPHY_ANA4_REG_TXDNSD(1) |
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SUN6I_DPHY_ANA4_REG_TXPUSC(1) |
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SUN6I_DPHY_ANA4_REG_TXPUSD(1) |
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SUN6I_DPHY_ANA4_REG_DMPLVC |
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SUN6I_DPHY_ANA4_REG_DMPLVD(lanes_mask));
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regmap_write(dphy->regs, SUN6I_DPHY_ANA2_REG,
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SUN6I_DPHY_ANA2_REG_ENIB);
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udelay(5);
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regmap_write(dphy->regs, SUN6I_DPHY_ANA3_REG,
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SUN6I_DPHY_ANA3_EN_LDOR |
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SUN6I_DPHY_ANA3_EN_LDOC |
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SUN6I_DPHY_ANA3_EN_LDOD);
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udelay(1);
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}
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static void sun50i_a100_mipi_dphy_tx_power_on(struct sun6i_dphy *dphy)
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{
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unsigned long mipi_symbol_rate = dphy->config.hs_clk_rate;
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unsigned int div, n;
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regmap_write(dphy->regs, SUN6I_DPHY_ANA4_REG,
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SUN6I_DPHY_ANA4_REG_IB(2) |
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SUN6I_DPHY_ANA4_REG_DMPLVD(4) |
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SUN6I_DPHY_ANA4_REG_VTT_SET(3) |
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SUN6I_DPHY_ANA4_REG_CKDV(3) |
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SUN6I_DPHY_ANA4_REG_TMSD(1) |
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SUN6I_DPHY_ANA4_REG_TMSC(1) |
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SUN6I_DPHY_ANA4_REG_TXPUSD(2) |
|
||
|
|
SUN6I_DPHY_ANA4_REG_TXPUSC(3) |
|
||
|
|
SUN6I_DPHY_ANA4_REG_TXDNSD(2) |
|
||
|
|
SUN6I_DPHY_ANA4_REG_TXDNSC(3));
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA2_REG,
|
||
|
|
SUN6I_DPHY_ANA2_EN_CK_CPU,
|
||
|
|
SUN6I_DPHY_ANA2_EN_CK_CPU);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA2_REG,
|
||
|
|
SUN6I_DPHY_ANA2_REG_ENIB,
|
||
|
|
SUN6I_DPHY_ANA2_REG_ENIB);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA3_REG,
|
||
|
|
SUN6I_DPHY_ANA3_EN_LDOR |
|
||
|
|
SUN6I_DPHY_ANA3_EN_LDOC |
|
||
|
|
SUN6I_DPHY_ANA3_EN_LDOD);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA0_REG,
|
||
|
|
SUN6I_DPHY_ANA0_REG_PLR(4) |
|
||
|
|
SUN6I_DPHY_ANA0_REG_SFB(1));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN50I_COMBO_PHY_REG0,
|
||
|
|
SUN50I_COMBO_PHY_REG0_EN_CP);
|
||
|
|
|
||
|
|
/* Choose a divider to limit the VCO frequency to around 2 GHz. */
|
||
|
|
div = 16 >> order_base_2(DIV_ROUND_UP(mipi_symbol_rate, 264000000));
|
||
|
|
n = mipi_symbol_rate * div / 24000000;
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN50I_DPHY_PLL_REG0,
|
||
|
|
SUN50I_DPHY_PLL_REG0_CP36_EN |
|
||
|
|
SUN50I_DPHY_PLL_REG0_LDO_EN |
|
||
|
|
SUN50I_DPHY_PLL_REG0_EN_LVS |
|
||
|
|
SUN50I_DPHY_PLL_REG0_PLL_EN |
|
||
|
|
SUN50I_DPHY_PLL_REG0_NDET |
|
||
|
|
SUN50I_DPHY_PLL_REG0_P((div - 1) % 8) |
|
||
|
|
SUN50I_DPHY_PLL_REG0_N(n) |
|
||
|
|
SUN50I_DPHY_PLL_REG0_M0((div - 1) / 8) |
|
||
|
|
SUN50I_DPHY_PLL_REG0_M1(2));
|
||
|
|
|
||
|
|
/* Disable sigma-delta modulation. */
|
||
|
|
regmap_write(dphy->regs, SUN50I_DPHY_PLL_REG2, 0);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA4_REG,
|
||
|
|
SUN6I_DPHY_ANA4_REG_EN_MIPI,
|
||
|
|
SUN6I_DPHY_ANA4_REG_EN_MIPI);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN50I_COMBO_PHY_REG0,
|
||
|
|
SUN50I_COMBO_PHY_REG0_EN_MIPI |
|
||
|
|
SUN50I_COMBO_PHY_REG0_EN_COMBOLDO,
|
||
|
|
SUN50I_COMBO_PHY_REG0_EN_MIPI |
|
||
|
|
SUN50I_COMBO_PHY_REG0_EN_COMBOLDO);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN50I_COMBO_PHY_REG2,
|
||
|
|
SUN50I_COMBO_PHY_REG2_HS_STOP_DLY(20));
|
||
|
|
udelay(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sun6i_dphy_tx_power_on(struct sun6i_dphy *dphy)
|
||
|
|
{
|
||
|
|
u8 lanes_mask = GENMASK(dphy->config.lanes - 1, 0);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_TX_CTL_REG,
|
||
|
|
SUN6I_DPHY_TX_CTL_HS_TX_CLK_CONT);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME0_REG,
|
||
|
|
SUN6I_DPHY_TX_TIME0_LP_CLK_DIV(14) |
|
||
|
|
SUN6I_DPHY_TX_TIME0_HS_PREPARE(6) |
|
||
|
|
SUN6I_DPHY_TX_TIME0_HS_TRAIL(10));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME1_REG,
|
||
|
|
SUN6I_DPHY_TX_TIME1_CLK_PREPARE(7) |
|
||
|
|
SUN6I_DPHY_TX_TIME1_CLK_ZERO(50) |
|
||
|
|
SUN6I_DPHY_TX_TIME1_CLK_PRE(3) |
|
||
|
|
SUN6I_DPHY_TX_TIME1_CLK_POST(10));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME2_REG,
|
||
|
|
SUN6I_DPHY_TX_TIME2_CLK_TRAIL(30));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME3_REG, 0);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME4_REG,
|
||
|
|
SUN6I_DPHY_TX_TIME4_HS_TX_ANA0(3) |
|
||
|
|
SUN6I_DPHY_TX_TIME4_HS_TX_ANA1(3));
|
||
|
|
|
||
|
|
dphy->variant->tx_power_on(dphy);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA3_REG,
|
||
|
|
SUN6I_DPHY_ANA3_EN_VTTC |
|
||
|
|
SUN6I_DPHY_ANA3_EN_VTTD_MASK,
|
||
|
|
SUN6I_DPHY_ANA3_EN_VTTC |
|
||
|
|
SUN6I_DPHY_ANA3_EN_VTTD(lanes_mask));
|
||
|
|
udelay(1);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA3_REG,
|
||
|
|
SUN6I_DPHY_ANA3_EN_DIV,
|
||
|
|
SUN6I_DPHY_ANA3_EN_DIV);
|
||
|
|
udelay(1);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA2_REG,
|
||
|
|
SUN6I_DPHY_ANA2_EN_CK_CPU,
|
||
|
|
SUN6I_DPHY_ANA2_EN_CK_CPU);
|
||
|
|
udelay(1);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA1_REG,
|
||
|
|
SUN6I_DPHY_ANA1_REG_VTTMODE,
|
||
|
|
SUN6I_DPHY_ANA1_REG_VTTMODE);
|
||
|
|
|
||
|
|
regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA2_REG,
|
||
|
|
SUN6I_DPHY_ANA2_EN_P2S_CPU_MASK,
|
||
|
|
SUN6I_DPHY_ANA2_EN_P2S_CPU(lanes_mask));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_GCTL_REG,
|
||
|
|
SUN6I_DPHY_GCTL_LANE_NUM(dphy->config.lanes) |
|
||
|
|
SUN6I_DPHY_GCTL_EN);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sun6i_dphy_rx_power_on(struct sun6i_dphy *dphy)
|
||
|
|
{
|
||
|
|
/* Physical clock rate is actually half of symbol rate with DDR. */
|
||
|
|
unsigned long mipi_symbol_rate = dphy->config.hs_clk_rate;
|
||
|
|
unsigned long dphy_clk_rate;
|
||
|
|
unsigned int rx_dly;
|
||
|
|
unsigned int lprst_dly;
|
||
|
|
u32 value;
|
||
|
|
|
||
|
|
dphy_clk_rate = clk_get_rate(dphy->mod_clk);
|
||
|
|
if (!dphy_clk_rate)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
/* Hardcoded timing parameters from the Allwinner BSP. */
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_RX_TIME0_REG,
|
||
|
|
SUN6I_DPHY_RX_TIME0_HS_RX_SYNC(255) |
|
||
|
|
SUN6I_DPHY_RX_TIME0_HS_RX_CLK_MISS(255) |
|
||
|
|
SUN6I_DPHY_RX_TIME0_LP_RX(255));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Formula from the Allwinner BSP, with hardcoded coefficients
|
||
|
|
* (probably internal divider/multiplier).
|
||
|
|
*/
|
||
|
|
rx_dly = 8 * (unsigned int)(dphy_clk_rate / (mipi_symbol_rate / 8));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The Allwinner BSP has an alternative formula for LP_RX_ULPS_WP:
|
||
|
|
* lp_ulps_wp_cnt = lp_ulps_wp_ms * lp_clk / 1000
|
||
|
|
* but does not use it and hardcodes 255 instead.
|
||
|
|
*/
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_RX_TIME1_REG,
|
||
|
|
SUN6I_DPHY_RX_TIME1_RX_DLY(rx_dly) |
|
||
|
|
SUN6I_DPHY_RX_TIME1_LP_RX_ULPS_WP(255));
|
||
|
|
|
||
|
|
/* HS_RX_ANA0 value is hardcoded in the Allwinner BSP. */
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_RX_TIME2_REG,
|
||
|
|
SUN6I_DPHY_RX_TIME2_HS_RX_ANA0(4));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Formula from the Allwinner BSP, with hardcoded coefficients
|
||
|
|
* (probably internal divider/multiplier).
|
||
|
|
*/
|
||
|
|
lprst_dly = 4 * (unsigned int)(dphy_clk_rate / (mipi_symbol_rate / 2));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_RX_TIME3_REG,
|
||
|
|
SUN6I_DPHY_RX_TIME3_LPRST_DLY(lprst_dly));
|
||
|
|
|
||
|
|
/* Analog parameters are hardcoded in the Allwinner BSP. */
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA0_REG,
|
||
|
|
SUN6I_DPHY_ANA0_REG_PWS |
|
||
|
|
SUN6I_DPHY_ANA0_REG_SLV(7) |
|
||
|
|
SUN6I_DPHY_ANA0_REG_SFB(2));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA1_REG,
|
||
|
|
SUN6I_DPHY_ANA1_REG_SVTT(4));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA4_REG,
|
||
|
|
SUN6I_DPHY_ANA4_REG_DMPLVC |
|
||
|
|
SUN6I_DPHY_ANA4_REG_DMPLVD(1));
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA2_REG,
|
||
|
|
SUN6I_DPHY_ANA2_REG_ENIB);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA3_REG,
|
||
|
|
SUN6I_DPHY_ANA3_EN_LDOR |
|
||
|
|
SUN6I_DPHY_ANA3_EN_LDOC |
|
||
|
|
SUN6I_DPHY_ANA3_EN_LDOD);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Delay comes from the Allwinner BSP, likely for internal regulator
|
||
|
|
* ramp-up.
|
||
|
|
*/
|
||
|
|
udelay(3);
|
||
|
|
|
||
|
|
value = SUN6I_DPHY_RX_CTL_EN_DBC | SUN6I_DPHY_RX_CTL_RX_CLK_FORCE;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Rx data lane force-enable bits are used as regular RX enable by the
|
||
|
|
* Allwinner BSP.
|
||
|
|
*/
|
||
|
|
if (dphy->config.lanes >= 1)
|
||
|
|
value |= SUN6I_DPHY_RX_CTL_RX_D0_FORCE;
|
||
|
|
if (dphy->config.lanes >= 2)
|
||
|
|
value |= SUN6I_DPHY_RX_CTL_RX_D1_FORCE;
|
||
|
|
if (dphy->config.lanes >= 3)
|
||
|
|
value |= SUN6I_DPHY_RX_CTL_RX_D2_FORCE;
|
||
|
|
if (dphy->config.lanes == 4)
|
||
|
|
value |= SUN6I_DPHY_RX_CTL_RX_D3_FORCE;
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_RX_CTL_REG, value);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_GCTL_REG,
|
||
|
|
SUN6I_DPHY_GCTL_LANE_NUM(dphy->config.lanes) |
|
||
|
|
SUN6I_DPHY_GCTL_EN);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sun6i_dphy_power_on(struct phy *phy)
|
||
|
|
{
|
||
|
|
struct sun6i_dphy *dphy = phy_get_drvdata(phy);
|
||
|
|
|
||
|
|
switch (dphy->direction) {
|
||
|
|
case SUN6I_DPHY_DIRECTION_TX:
|
||
|
|
return sun6i_dphy_tx_power_on(dphy);
|
||
|
|
case SUN6I_DPHY_DIRECTION_RX:
|
||
|
|
return sun6i_dphy_rx_power_on(dphy);
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sun6i_dphy_power_off(struct phy *phy)
|
||
|
|
{
|
||
|
|
struct sun6i_dphy *dphy = phy_get_drvdata(phy);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_GCTL_REG, 0);
|
||
|
|
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA0_REG, 0);
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA1_REG, 0);
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA2_REG, 0);
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA3_REG, 0);
|
||
|
|
regmap_write(dphy->regs, SUN6I_DPHY_ANA4_REG, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sun6i_dphy_exit(struct phy *phy)
|
||
|
|
{
|
||
|
|
struct sun6i_dphy *dphy = phy_get_drvdata(phy);
|
||
|
|
|
||
|
|
clk_rate_exclusive_put(dphy->mod_clk);
|
||
|
|
clk_disable_unprepare(dphy->mod_clk);
|
||
|
|
reset_control_assert(dphy->reset);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static const struct phy_ops sun6i_dphy_ops = {
|
||
|
|
.configure = sun6i_dphy_configure,
|
||
|
|
.power_on = sun6i_dphy_power_on,
|
||
|
|
.power_off = sun6i_dphy_power_off,
|
||
|
|
.init = sun6i_dphy_init,
|
||
|
|
.exit = sun6i_dphy_exit,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct regmap_config sun6i_dphy_regmap_config = {
|
||
|
|
.reg_bits = 32,
|
||
|
|
.val_bits = 32,
|
||
|
|
.reg_stride = 4,
|
||
|
|
.max_register = SUN50I_COMBO_PHY_REG2,
|
||
|
|
.name = "mipi-dphy",
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sun6i_dphy_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct phy_provider *phy_provider;
|
||
|
|
struct sun6i_dphy *dphy;
|
||
|
|
const char *direction;
|
||
|
|
void __iomem *regs;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
|
||
|
|
if (!dphy)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
dphy->variant = device_get_match_data(&pdev->dev);
|
||
|
|
if (!dphy->variant)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
regs = devm_platform_ioremap_resource(pdev, 0);
|
||
|
|
if (IS_ERR(regs)) {
|
||
|
|
dev_err(&pdev->dev, "Couldn't map the DPHY encoder registers\n");
|
||
|
|
return PTR_ERR(regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
dphy->regs = devm_regmap_init_mmio_clk(&pdev->dev, "bus",
|
||
|
|
regs, &sun6i_dphy_regmap_config);
|
||
|
|
if (IS_ERR(dphy->regs)) {
|
||
|
|
dev_err(&pdev->dev, "Couldn't create the DPHY encoder regmap\n");
|
||
|
|
return PTR_ERR(dphy->regs);
|
||
|
|
}
|
||
|
|
|
||
|
|
dphy->reset = devm_reset_control_get_shared(&pdev->dev, NULL);
|
||
|
|
if (IS_ERR(dphy->reset)) {
|
||
|
|
dev_err(&pdev->dev, "Couldn't get our reset line\n");
|
||
|
|
return PTR_ERR(dphy->reset);
|
||
|
|
}
|
||
|
|
|
||
|
|
dphy->mod_clk = devm_clk_get(&pdev->dev, "mod");
|
||
|
|
if (IS_ERR(dphy->mod_clk)) {
|
||
|
|
dev_err(&pdev->dev, "Couldn't get the DPHY mod clock\n");
|
||
|
|
return PTR_ERR(dphy->mod_clk);
|
||
|
|
}
|
||
|
|
|
||
|
|
dphy->phy = devm_phy_create(&pdev->dev, NULL, &sun6i_dphy_ops);
|
||
|
|
if (IS_ERR(dphy->phy)) {
|
||
|
|
dev_err(&pdev->dev, "failed to create PHY\n");
|
||
|
|
return PTR_ERR(dphy->phy);
|
||
|
|
}
|
||
|
|
|
||
|
|
dphy->direction = SUN6I_DPHY_DIRECTION_TX;
|
||
|
|
|
||
|
|
ret = of_property_read_string(pdev->dev.of_node, "allwinner,direction",
|
||
|
|
&direction);
|
||
|
|
|
||
|
|
if (!ret && !strncmp(direction, "rx", 2)) {
|
||
|
|
if (!dphy->variant->rx_supported) {
|
||
|
|
dev_err(&pdev->dev, "RX not supported on this variant\n");
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
dphy->direction = SUN6I_DPHY_DIRECTION_RX;
|
||
|
|
}
|
||
|
|
|
||
|
|
phy_set_drvdata(dphy->phy, dphy);
|
||
|
|
phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
|
||
|
|
|
||
|
|
return PTR_ERR_OR_ZERO(phy_provider);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct sun6i_dphy_variant sun6i_a31_mipi_dphy_variant = {
|
||
|
|
.tx_power_on = sun6i_a31_mipi_dphy_tx_power_on,
|
||
|
|
.rx_supported = true,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct sun6i_dphy_variant sun50i_a100_mipi_dphy_variant = {
|
||
|
|
.tx_power_on = sun50i_a100_mipi_dphy_tx_power_on,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct of_device_id sun6i_dphy_of_table[] = {
|
||
|
|
{
|
||
|
|
.compatible = "allwinner,sun6i-a31-mipi-dphy",
|
||
|
|
.data = &sun6i_a31_mipi_dphy_variant,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.compatible = "allwinner,sun50i-a100-mipi-dphy",
|
||
|
|
.data = &sun50i_a100_mipi_dphy_variant,
|
||
|
|
},
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, sun6i_dphy_of_table);
|
||
|
|
|
||
|
|
static struct platform_driver sun6i_dphy_platform_driver = {
|
||
|
|
.probe = sun6i_dphy_probe,
|
||
|
|
.driver = {
|
||
|
|
.name = "sun6i-mipi-dphy",
|
||
|
|
.of_match_table = sun6i_dphy_of_table,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
module_platform_driver(sun6i_dphy_platform_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@bootlin>");
|
||
|
|
MODULE_DESCRIPTION("Allwinner A31 MIPI D-PHY Driver");
|
||
|
|
MODULE_LICENSE("GPL");
|