mediatek/mt8173: Add SPI support

BUG=none
TEST=emerge-oak coreboot
BRANCH=none

[pg: split into multiple commits]

Change-Id: I82d982b40dd0bfaa7770a6b08c70b20337a46955
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 41acc14e9fe54924d20e4e5a2d1519251f0e1c87
Original-Change-Id: I2559be4191da9af523944563729171bd92a86cd0
Original-Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292661
Original-Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12611
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8173/include/soc/spi.h b/src/soc/mediatek/mt8173/include/soc/spi.h
new file mode 100644
index 0000000000..52f4f4cef3
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/spi.h
@@ -0,0 +1,109 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 MediaTek 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 MTK_MT8173_SPI_H
+#define MTK_MT8173_SPI_H
+
+#include <spi-generic.h>
+#include <types.h>
+
+/* SPI peripheral register map. */
+typedef struct mtk_spi_regs {
+	uint32_t spi_cfg0_reg;
+	uint32_t spi_cfg1_reg;
+	uint32_t spi_tx_src_reg;
+	uint32_t spi_rx_dst_reg;
+	uint32_t spi_tx_data_reg;
+	uint32_t spi_rx_data_reg;
+	uint32_t spi_cmd_reg;
+	uint32_t spi_status0_reg;
+	uint32_t spi_status1_reg;
+	uint32_t spi_pad_macro_sel_reg;
+} mtk_spi_regs;
+
+check_member(mtk_spi_regs, spi_pad_macro_sel_reg, 0x24);
+
+/* SPI_CFG0_REG */
+enum {
+	SPI_CFG0_SCK_HIGH_SHIFT = 0,
+	SPI_CFG0_SCK_LOW_SHIFT = 8,
+	SPI_CFG0_CS_HOLD_SHIFT = 16,
+	SPI_CFG0_CS_SETUP_SHIFT = 24,
+};
+
+/*SPI_CFG1_REG*/
+enum {
+	SPI_CFG1_CS_IDLE_SHIFT = 0,
+	SPI_CFG1_PACKET_LOOP_SHIFT = 8,
+	SPI_CFG1_PACKET_LENGTH_SHIFT = 16,
+
+	SPI_CFG1_CS_IDLE_MASK = 0xff << SPI_CFG1_CS_IDLE_SHIFT,
+	SPI_CFG1_PACKET_LOOP_MASK = 0xff << SPI_CFG1_PACKET_LOOP_SHIFT,
+	SPI_CFG1_PACKET_LENGTH_MASK = 0x3ff << SPI_CFG1_PACKET_LENGTH_SHIFT,
+};
+
+enum {
+	SPI_CMD_ACT_SHIFT = 0,
+	SPI_CMD_RESUME_SHIFT = 1,
+	SPI_CMD_RST_SHIFT = 2,
+	SPI_CMD_PAUSE_EN_SHIFT = 4,
+	SPI_CMD_DEASSERT_SHIFT = 5,
+	SPI_CMD_CPHA_SHIFT = 8,
+	SPI_CMD_CPOL_SHIFT = 9,
+	SPI_CMD_RX_DMA_SHIFT = 10,
+	SPI_CMD_TX_DMA_SHIFT = 11,
+	SPI_CMD_TXMSBF_SHIFT = 12,
+	SPI_CMD_RXMSBF_SHIFT = 13,
+	SPI_CMD_RX_ENDIAN_SHIFT = 14,
+	SPI_CMD_TX_ENDIAN_SHIFT = 15,
+	SPI_CMD_FINISH_IE_SHIFT = 16,
+	SPI_CMD_PAUSE_IE_SHIFT = 17,
+
+	SPI_CMD_ACT_EN = BIT(SPI_CMD_ACT_SHIFT),
+	SPI_CMD_RESUME_EN = BIT(SPI_CMD_RESUME_SHIFT),
+	SPI_CMD_RST_EN = BIT(SPI_CMD_RST_SHIFT),
+	SPI_CMD_PAUSE_EN = BIT(SPI_CMD_PAUSE_EN_SHIFT),
+	SPI_CMD_DEASSERT_EN = BIT(SPI_CMD_DEASSERT_SHIFT),
+	SPI_CMD_CPHA_EN = BIT(SPI_CMD_CPHA_SHIFT),
+	SPI_CMD_CPOL_EN = BIT(SPI_CMD_CPOL_SHIFT),
+	SPI_CMD_RX_DMA_EN = BIT(SPI_CMD_RX_DMA_SHIFT),
+	SPI_CMD_TX_DMA_EN = BIT(SPI_CMD_TX_DMA_SHIFT),
+	SPI_CMD_TXMSBF_EN = BIT(SPI_CMD_TXMSBF_SHIFT),
+	SPI_CMD_RXMSBF_EN = BIT(SPI_CMD_RXMSBF_SHIFT),
+	SPI_CMD_RX_ENDIAN_EN = BIT(SPI_CMD_RX_ENDIAN_SHIFT),
+	SPI_CMD_TX_ENDIAN_EN = BIT(SPI_CMD_TX_ENDIAN_SHIFT),
+	SPI_CMD_FINISH_IE_EN = BIT(SPI_CMD_FINISH_IE_SHIFT),
+	SPI_CMD_PAUSE_IE_EN = BIT(SPI_CMD_PAUSE_IE_SHIFT),
+};
+
+enum spi_pad_mask {
+	SPI_PAD0_MASK = 0x0,
+	SPI_PAD1_MASK = 0x1,
+	SPI_PAD2_MASK = 0x2,
+	SPI_PAD3_MASK = 0x3,
+	SPI_PAD_SEL_MASK = 0x3
+};
+
+
+struct mtk_spi_bus {
+	struct spi_slave slave;
+	struct mtk_spi_regs *regs;
+	int initialized;
+	int state;
+};
+
+void mtk_spi_init(unsigned int bus, unsigned int pad_select,
+		  unsigned int speed_hz);
+#endif