From 842f76c90ca874e6497f6af49ee36ec758265171 Mon Sep 17 00:00:00 2001 From: Tom Warren Date: Mon, 18 Aug 2014 13:27:45 -0700 Subject: [PATCH] tegra132: Add special I2C6 init I2C6 has a special mux in the SOR/DC domain, so there's a ton of devices that need to be clocked, SOR unpowergated, and then the I2C6 muxing done in the DPAUX_HYBRID_PADCTL register. BUG=none BRANCH=none TEST=none, built rush/ryu AOK Change-Id: Ibeeda763b7fb30fabaee85d03fbf7d5efb42a30a Signed-off-by: Patrick Georgi Original-Commit-Id: 0b4da98e20a89b045f2d5b5033a27cd7ab855f35 Original-Change-Id: I4aaa74ef1b3009da621d1a2ef6f79de8ebf545e2 Original-Signed-off-by: Tom Warren Original-Reviewed-on: https://chromium-review.googlesource.com/212887 Original-Reviewed-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/8992 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/soc/nvidia/tegra132/Makefile.inc | 1 + src/soc/nvidia/tegra132/i2c6.c | 98 +++++++++++++++++++ src/soc/nvidia/tegra132/include/soc/clock.h | 1 + .../nvidia/tegra132/include/soc/padconfig.h | 2 + src/soc/nvidia/tegra132/pmc.h | 1 + 5 files changed, 103 insertions(+) create mode 100644 src/soc/nvidia/tegra132/i2c6.c diff --git a/src/soc/nvidia/tegra132/Makefile.inc b/src/soc/nvidia/tegra132/Makefile.inc index 000e295ad3..fb9b0334ac 100644 --- a/src/soc/nvidia/tegra132/Makefile.inc +++ b/src/soc/nvidia/tegra132/Makefile.inc @@ -30,6 +30,7 @@ romstage-y += clock.c romstage-y += reset.c romstage-y += spi.c romstage-y += i2c.c +romstage-y += i2c6.c romstage-y += dma.c romstage-y += monotonic_timer.c romstage-y += padconfig.c diff --git a/src/soc/nvidia/tegra132/i2c6.c b/src/soc/nvidia/tegra132/i2c6.c new file mode 100644 index 0000000000..4efba23ea7 --- /dev/null +++ b/src/soc/nvidia/tegra132/i2c6.c @@ -0,0 +1,98 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (c) 2014, NVIDIA CORPORATION. + * Copyright 2014 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include "delay.h" + +#define I2C6_BUS 5 +#define I2C6_PADCTL 0xC001 +#define DPAUX_HYBRID_PADCTL 0x545C0124 + +static struct tegra_pmc_regs * const pmc = (void *)TEGRA_PMC_BASE; +static struct clk_rst_ctlr *clk_rst = (void *)TEGRA_CLK_RST_BASE; + +static int partition_clamp_on(int id) +{ + return read32(&pmc->clamp_status) & (1 << id); +} + +static void remove_clamps(int id) +{ + if (!partition_clamp_on(id)) + return; + + /* Remove clamp */ + write32((1 << id), &pmc->remove_clamping_cmd); + + /* Wait for clamp off */ + while (partition_clamp_on(id)) + ; +} + +static void enable_sor_periphs(void) +{ + u32 lclks = CLK_L_HOST1X; + u32 hclks = CLK_H_MIPI_CAL | CLK_H_HDMI | CLK_H_DSI; + u32 uclks = CLK_U_DSIB; + u32 wclks = CLK_W_DP2 | CLK_W_HDA2HDMICODEC; + u32 xclks = CLK_X_DPAUX | CLK_X_SOR0 | CLK_X_HDMI_AUDIO; + + clock_enable(lclks, hclks, uclks, 0, wclks, xclks); + + /* Give clocks time to stabilize. */ + udelay(IO_STABILIZATION_DELAY); +} + +static void unreset_sor_periphs(void) +{ + u32 lclks = CLK_L_HOST1X; + u32 hclks = CLK_H_MIPI_CAL | CLK_H_HDMI | CLK_H_DSI; + u32 uclks = CLK_U_DSIB; + u32 wclks = CLK_W_DP2 | CLK_W_HDA2HDMICODEC; + u32 xclks = CLK_X_DPAUX | CLK_X_SOR0 | CLK_X_HDMI_AUDIO; + + clock_clear_reset(lclks, hclks, uclks, 0, wclks, xclks); +} + +void soc_configure_i2c6pad(void) +{ + /* + * I2C6 on Tegra124/132 requires some special init. + * The SOR block must be unpowergated, and several + * display-based peripherals must be clocked and taken + * out of reset so that a DPAUX register can be + * configured to enable the I2C6 mux routing. + */ + power_ungate_partition(POWER_PARTID_SOR); + enable_sor_periphs(); + remove_clamps(POWER_PARTID_SOR); + unreset_sor_periphs(); + + /* Host1X needs a valid clock source so DPAUX can be accessed */ + clock_configure_source(host1x, PLLP, 204000); + + /* Now we can write the I2C6 mux in DPAUX */ + write32(I2C6_PADCTL, (void *)DPAUX_HYBRID_PADCTL); +} diff --git a/src/soc/nvidia/tegra132/include/soc/clock.h b/src/soc/nvidia/tegra132/include/soc/clock.h index 494f28d4db..eecb735672 100644 --- a/src/soc/nvidia/tegra132/include/soc/clock.h +++ b/src/soc/nvidia/tegra132/include/soc/clock.h @@ -146,6 +146,7 @@ enum { CLK_W_CEC = 0x1 << 8, CLK_W_XUSB_PADCTL = 0x1 << 14, CLK_W_ENTROPY = 0x1 << 21, + CLK_W_DP2 = 0x1 << 24, CLK_W_AMX0 = 0x1 << 25, CLK_W_ADX0 = 0x1 << 26, CLK_W_DVFS = 0x1 << 27, diff --git a/src/soc/nvidia/tegra132/include/soc/padconfig.h b/src/soc/nvidia/tegra132/include/soc/padconfig.h index addec8b041..a4339891f2 100644 --- a/src/soc/nvidia/tegra132/include/soc/padconfig.h +++ b/src/soc/nvidia/tegra132/include/soc/padconfig.h @@ -85,5 +85,7 @@ struct pad_config { * Configure the pads associated with entry according to the configuration. */ void soc_configure_pads(const struct pad_config * const entries, size_t num); +/* I2C6 requires special init as its pad lives int the SOR/DPAUX block */ +void soc_configure_i2c6pad(void); #endif /* __SOC_NVIDIA_TEGRA132_PAD_CFG_H */ diff --git a/src/soc/nvidia/tegra132/pmc.h b/src/soc/nvidia/tegra132/pmc.h index e9fbcd602e..60d97c3cbe 100644 --- a/src/soc/nvidia/tegra132/pmc.h +++ b/src/soc/nvidia/tegra132/pmc.h @@ -34,6 +34,7 @@ enum { POWER_PARTID_CE0 = 14, POWER_PARTID_C0NC = 15, POWER_PARTID_C1NC = 16, + POWER_PARTID_SOR = 17, POWER_PARTID_DIS = 18, POWER_PARTID_DISB = 19, POWER_PARTID_XUSBA = 20,