soc/marvell/armada38x: Add i2c driver for armada38x

Port i2c driver from uboot to coreboot

BUG=chrome-os-partner:47462
TEST=emerge-cyclone coreboot
BRANCH=tot

Change-Id: I8ce2a965acaed68ad0f0518648490ec471c6810b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4c2e9592662787ebed1d0aa8cafaa00fd12c2e9c
Original-Change-Id: If791228edf29405fa4b2f959a21510bd7da9865b
Original-Signed-off-by: Ruilin Hao <rlhao@marvell.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/313342
Original-Commit-Ready: Kan Yan <kyan@google.com>
Original-Tested-by: Kan Yan <kyan@google.com>
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/13113
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/soc/marvell/armada38x/Makefile.inc

@@ -5,6 +5,7 @@ bootblock-y += bootblock_asm.S
 bootblock-y += spi.c
 bootblock-y += gpio.c
 bootblock-y += monotonic_timer.c
+bootblock-y += clock.c
 ifeq ($(CONFIG_BOOTBLOCK_CONSOLE),y)
 bootblock-$(CONFIG_DRIVERS_UART) += uart.c
 endif
@@ -13,12 +14,15 @@ verstage-$(CONFIG_DRIVERS_UART) += uart.c
 verstage-y += monotonic_timer.c
 verstage-y += spi.c
 verstage-y += gpio.c
+verstage-y += i2c.c
+verstage-y += clock.c
 
 romstage-y += spi.c
 romstage-y += gpio.c
 romstage-y += cbmem.c
 romstage-y += monotonic_timer.c
 romstage-$(CONFIG_DRIVERS_UART) += uart.c
+romstage-y += clock.c
 
 ramstage-y += spi.c
 ramstage-y += gpio.c
@@ -26,8 +30,9 @@ ramstage-y += cbmem.c
 ramstage-y += monotonic_timer.c
 ramstage-y += soc.c
 ramstage-$(CONFIG_DRIVERS_UART) += uart.c
+ramstage-y += clock.c
 
-CPPFLAGS_common += -Isrc/soc/marvell/armada38x/include/
+CPPFLAGS_common += -Isrc/soc/marvell/armada38x/include/ -Isrc/commonlib/include/commonlib/
 
 BIN_HDR = 3rdparty/blobs/cpu/marvell/armada38x/bin_hdr.bin
 DOIMAGE = 3rdparty/blobs/cpu/marvell/armada38x/doimage

src/soc/marvell/armada38x/clock.c

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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.
+ */
+
+#include <soc/common.h>
+#include <soc/clock.h>
+
+uint32_t mv_tclk_get(void)
+{
+	uint32_t tclk_reg_value;
+	uint32_t tclk;
+
+	tclk_reg_value = (mrvl_reg_read(MPP_SAMPLE_AT_RESET));
+	tclk_reg_value = ((tclk_reg_value & (1 << 15)) >> 15);
+	switch (tclk_reg_value) {
+	case 0:
+		tclk = MV_BOARD_TCLK_250MHZ;
+	case 1:
+		tclk = MV_BOARD_TCLK_200MHZ;
+	default:
+		tclk = MV_BOARD_TCLK_250MHZ;
+	}
+	return tclk;
+}

src/soc/marvell/armada38x/include/soc/clock.h

@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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.
+ */
+
+#ifndef __SOC_MARVELL_ARMADA38X_CLOCK_H_
+#define __SOC_MARVELL_ARMADA38X_CLOCK_H_
+
+uint32_t mv_tclk_get(void);
+
+#endif  // __SOC_MARVELL_ARMADA38X_CLOCK_H_

src/soc/marvell/armada38x/include/soc/i2c.h

@@ -0,0 +1,120 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 Marvell 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.
+ */
+
+#ifndef __SOC_MARVELL_ARMADA38X_I2C_H_
+#define __SOC_MARVELL_ARMADA38X_I2C_H_
+
+#include <types.h>
+
+#define TWSI_SPEED 100000
+
+#define MAX_I2C_NUM 2
+#define MAX_RETRY_CNT 1000
+#define TWSI_TIMEOUT_VALUE 0x500
+
+#define MV_TWSI_SLAVE_REGS_OFFSET(chan_num) (0x11000 + (chan_num * 0x100))
+#define MV_TWSI_SLAVE_REGS_BASE(unit) (MV_TWSI_SLAVE_REGS_OFFSET(unit))
+#define TWSI_SLAVE_ADDR_REG(chan_num) (MV_TWSI_SLAVE_REGS_BASE(chan_num) + 0x00)
+
+#define MV_CPUIF_REGS_OFFSET(cpu) (0x21800 + (cpu)*0x100)
+#define MV_CPUIF_REGS_BASE(cpu) (MV_CPUIF_REGS_OFFSET(cpu))
+#define CPU_MAIN_INT_CAUSE_REG(vec, cpu) \
+	(MV_CPUIF_REGS_BASE(cpu) + 0x80 + (vec * 0x4))
+#define CPU_MAIN_INT_TWSI_OFFS(i) (2 + i)
+#define CPU_MAIN_INT_CAUSE_TWSI(i) (31 + i)
+#define TWSI_CPU_MAIN_INT_CAUSE_REG(cpu) CPU_MAIN_INT_CAUSE_REG(1, (cpu))
+#define MV_TWSI_CPU_MAIN_INT_CAUSE(ch_num, cpu) TWSI_CPU_MAIN_INT_CAUSE_REG(cpu)
+
+#define MV_MBUS_REGS_OFFSET (0x20000)
+#define MV_CPUIF_SHARED_REGS_BASE (MV_MBUS_REGS_OFFSET)
+#define CPU_INT_SOURCE_CONTROL_REG(i) \
+	(MV_CPUIF_SHARED_REGS_BASE + 0xB00 + (i * 0x4))
+
+#define CPU_INT_SOURCE_CONTROL_IRQ_OFFS 28
+#define CPU_INT_SOURCE_CONTROL_IRQ_MASK (1 << CPU_INT_SOURCE_CONTROL_IRQ_OFFS)
+
+#define TWSI_SLAVE_ADDR_GCE_ENA BIT(0)
+#define TWSI_SLAVE_ADDR_7_BIT_OFFS 0x1
+#define TWSI_SLAVE_ADDR_7_BIT_MASK (0xFF << TWSI_SLAVE_ADDR_7_BIT_OFFS)
+#define TWSI_SLAVE_ADDR_10_BIT_OFFS 0x7
+#define TWSI_SLAVE_ADDR_10_BIT_MASK 0x300
+#define TWSI_SLAVE_ADDR_10_BIT_CONST 0xF0
+
+#define TWSI_DATA_REG(chan_num) (MV_TWSI_SLAVE_REGS_BASE(chan_num) + 0x04)
+#define TWSI_DATA_COMMAND_OFFS 0x0
+#define TWSI_DATA_COMMAND_MASK (0x1 << TWSI_DATA_COMMAND_OFFS)
+#define TWSI_DATA_COMMAND_WR (0x1 << TWSI_DATA_COMMAND_OFFS)
+#define TWSI_DATA_COMMAND_RD (0x0 << TWSI_DATA_COMMAND_OFFS)
+#define TWSI_DATA_ADDR_7_BIT_OFFS 0x1
+#define TWSI_DATA_ADDR_7_BIT_MASK (0xFF << TWSI_DATA_ADDR_7_BIT_OFFS)
+#define TWSI_DATA_ADDR_10_BIT_OFFS 0x7
+#define TWSI_DATA_ADDR_10_BIT_MASK 0x300
+#define TWSI_DATA_ADDR_10_BIT_CONST 0xF0
+
+#define TWSI_CONTROL_REG(chan_num) (MV_TWSI_SLAVE_REGS_BASE(chan_num) + 0x08)
+#define TWSI_CONTROL_ACK BIT(2)
+#define TWSI_CONTROL_INT_FLAG_SET BIT(3)
+#define TWSI_CONTROL_STOP_BIT BIT(4)
+#define TWSI_CONTROL_START_BIT BIT(5)
+#define TWSI_CONTROL_ENA BIT(6)
+#define TWSI_CONTROL_INT_ENA BIT(7)
+
+#define TWSI_STATUS_BAUDE_RATE_REG(chan_num) \
+	(MV_TWSI_SLAVE_REGS_BASE(chan_num) + 0x0c)
+#define TWSI_BAUD_RATE_N_OFFS 0
+#define TWSI_BAUD_RATE_N_MASK (0x7 << TWSI_BAUD_RATE_N_OFFS)
+#define TWSI_BAUD_RATE_M_OFFS 3
+#define TWSI_BAUD_RATE_M_MASK (0xF << TWSI_BAUD_RATE_M_OFFS)
+
+#define TWSI_EXTENDED_SLAVE_ADDR_REG(chan_num) \
+	(MV_TWSI_SLAVE_REGS_BASE(chan_num) + 0x10)
+#define TWSI_EXTENDED_SLAVE_OFFS 0
+#define TWSI_EXTENDED_SLAVE_MASK (0xFF << TWSI_EXTENDED_SLAVE_OFFS)
+
+#define TWSI_SOFT_RESET_REG(chan_num) (MV_TWSI_SLAVE_REGS_BASE(chan_num) + 0x1c)
+
+#define TWSI_BUS_ERROR 0x00
+#define TWSI_START_CON_TRA 0x08
+#define TWSI_REPEATED_START_CON_TRA 0x10
+#define TWSI_AD_PLS_WR_BIT_TRA_ACK_REC 0x18
+#define TWSI_AD_PLS_WR_BIT_TRA_ACK_NOT_REC 0x20
+#define TWSI_M_TRAN_DATA_BYTE_ACK_REC 0x28
+#define TWSI_M_TRAN_DATA_BYTE_ACK_NOT_REC 0x30
+#define TWSI_M_LOST_ARB_DUR_AD_OR_DATA_TRA 0x38
+#define TWSI_AD_PLS_RD_BIT_TRA_ACK_REC 0x40
+#define TWSI_AD_PLS_RD_BIT_TRA_ACK_NOT_REC 0x48
+#define TWSI_M_REC_RD_DATA_ACK_TRA 0x50
+#define TWSI_M_REC_RD_DATA_ACK_NOT_TRA 0x58
+#define TWSI_SLA_REC_AD_PLS_WR_BIT_ACK_TRA 0x60
+#define TWSI_M_LOST_ARB_DUR_AD_TRA_AD_IS_TRGT_TO_SLA_ACK_TRA_W 0x68
+#define TWSI_GNL_CALL_REC_ACK_TRA 0x70
+#define TWSI_M_LOST_ARB_DUR_AD_TRA_GNL_CALL_AD_REC_ACK_TRA 0x78
+#define TWSI_SLA_REC_WR_DATA_AF_REC_SLA_AD_ACK_TRAN 0x80
+#define TWSI_SLA_REC_WR_DATA_AF_REC_SLA_AD_ACK_NOT_TRAN 0x88
+#define TWSI_SLA_REC_WR_DATA_AF_REC_GNL_CALL_ACK_TRAN 0x90
+#define TWSI_SLA_REC_WR_DATA_AF_REC_GNL_CALL_ACK_NOT_TRAN 0x98
+#define TWSI_SLA_REC_STOP_OR_REPEATED_STRT_CON 0xA0
+#define TWSI_SLA_REC_AD_PLS_RD_BIT_ACK_TRA 0xA8
+#define TWSI_M_LOST_ARB_DUR_AD_TRA_AD_IS_TRGT_TO_SLA_ACK_TRA_R 0xB0
+#define TWSI_SLA_TRA_RD_DATA_ACK_REC 0xB8
+#define TWSI_SLA_TRA_RD_DATA_ACK_NOT_REC 0xC0
+#define TWSI_SLA_TRA_LAST_RD_DATA_ACK_REC 0xC8
+#define TWSI_SEC_AD_PLS_WR_BIT_TRA_ACK_REC 0xD0
+#define TWSI_SEC_AD_PLS_WR_BIT_TRA_ACK_NOT_REC 0xD8
+#define TWSI_SEC_AD_PLS_RD_BIT_TRA_ACK_REC 0xE0
+#define TWSI_SEC_AD_PLS_RD_BIT_TRA_ACK_NOT_REC 0xE8
+#define TWSI_NO_REL_STS_INT_FLAG_IS_KEPT_0 0xF8
+
+#endif  // __SOC_MARVELL_ARMADA38X_I2C_H__

src/soc/marvell/armada38x/spi.c

@@ -21,6 +21,7 @@
 #include <assert.h>
 #include <console/console.h>
 #include <soc/common.h>
+#include <soc/clock.h>
 
 /******************************************************************************
 base type define
@@ -352,7 +353,7 @@ int mv_spi_sys_init(unsigned char spi_id,
 	MV_SPI_HAL_DATA hal_data;
 
 	hal_data.ctrl_model = MV_6810_DEV_ID;
-	hal_data.tclk = MV_BOARD_TCLK_250MHZ;
+	hal_data.tclk = mv_tclk_get();
 
 	return mv_spi_init(spi_id, cs_id, serial_baud_rate, &hal_data);
 }

src/soc/marvell/armada38x/uart.c

@@ -21,6 +21,7 @@
 #include <stdint.h>
 #include <assert.h>
 #include <soc/common.h>
+#include <soc/clock.h>
 
 struct armada38x_uart {
 	union {
@@ -94,7 +95,7 @@ static int armada38x_uart_tst_byte(struct armada38x_uart *uart_ptr)
 
 unsigned int uart_platform_refclk(void)
 {
-	return MV_BOARD_TCLK_250MHZ;
+	return mv_tclk_get();
 }
 
 uintptr_t uart_platform_base(int idx)