sc7180: Add SPI-NOR support

This implements the SPI-NOR driver for the Qualcomm QSPI core.

Developer/Reviewer, be aware of this patch from Napali:
https://review.coreboot.org/c/coreboot/+/27483/58

Change-Id: I2eb8cf90aa4559541ba293b3fd2870896bed20b7
Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35501
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 121 insertions, 0 deletions

diff --git a/src/soc/qualcomm/sc7180/include/soc/qspi.h b/src/soc/qualcomm/sc7180/include/soc/qspi.h
new file mode 100644
index 0000000000..c3d1f78196
--- /dev/null
+++ b/src/soc/qualcomm/sc7180/include/soc/qspi.h
@@ -0,0 +1,121 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Qualcomm Technologies.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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 <types.h>
+#include <soc/addressmap.h>
+#include <spi-generic.h>
+
+#ifndef __SOC_QUALCOMM_SC7180_QSPI_H__
+#define __SOC_QUALCOMM_SC7180_QSPI_H__
+
+struct sc7180_qspi_regs {
+	u32 mstr_cfg;
+	u32 ahb_mstr_cfg;
+	u32 reserve_0;
+	u32 mstr_int_en;
+	u32 mstr_int_sts;
+	u32 pio_xfer_ctrl;
+	u32 pio_xfer_cfg;
+	u32 pio_xfer_sts;
+	u32 pio_dataout_1byte;
+	u32 pio_dataout_4byte;
+	u32 rd_fifo_cfg;
+	u32 rd_fifo_sts;
+	u32 rd_fifo_rst;
+	u32 reserve_1[3];
+	u32 next_dma_desc_addr;
+	u32 current_dma_desc_addr;
+	u32 current_mem_addr;
+	u32 hw_version;
+	u32 rd_fifo[16];
+};
+
+check_member(sc7180_qspi_regs, rd_fifo, 0x50);
+static struct sc7180_qspi_regs * const sc7180_qspi = (void *) QSPI_BASE;
+
+// MSTR_CONFIG register
+
+#define TX_DATA_OE_DELAY_SHIFT 24
+#define TX_DATA_OE_DELAY_MASK (0x3 << TX_DATA_OE_DELAY_SHIFT)
+#define TX_CS_N_DELAY_SHIFT 22
+#define TX_CS_N_DELAY_MASK (0x3 << TX_CS_N_DELAY_SHIFT)
+#define TX_CLK_DELAY_SHIFT 20
+#define TX_CLK_DELAY_MASK (0x3 << TX_CLK_DELAY_SHIFT)
+#define TX_DATA_DELAY_SHIFT 18
+#define TX_DATA_DELAY_MASK (0x3 << TX_DATA_DELAY_SHIFT)
+#define LPA_BASE_SHIFT 14
+#define LPA_BASE_MASK (0xF << LPA_BASE_SHIFT)
+#define SBL_EN BIT(13)
+#define CHIP_SELECT_NUM BIT(12)
+#define SPI_MODE_SHIFT 10
+#define SPI_MODE_MASK (0x3 << SPI_MODE_SHIFT)
+#define BIG_ENDIAN_MODE BIT(9)
+#define DMA_ENABLE BIT(8)
+#define PIN_WPN BIT(7)
+#define PIN_HOLDN BIT(6)
+#define FB_CLK_EN BIT(4)
+#define FULL_CYCLE_MODE BIT(3)
+
+// MSTR_INT_ENABLE and MSTR_INT_STATUS register
+
+#define DMA_CHAIN_DONE BIT(31)
+#define TRANSACTION_DONE BIT(16)
+#define WRITE_FIFO_OVERRUN BIT(11)
+#define WRITE_FIFO_FULL BIT(10)
+#define HRESP_FROM_NOC_ERR BIT(3)
+#define RESP_FIFO_RDY BIT(2)
+#define RESP_FIFO_NOT_EMPTY BIT(1)
+#define RESP_FIFO_UNDERRUN BIT(0)
+
+// PIO_TRANSFER_CONFIG register
+
+#define TRANSFER_FRAGMENT BIT(8)
+#define MULTI_IO_MODE_SHIFT 1
+#define MULTI_IO_MODE_MASK (0x7 << MULTI_IO_MODE_SHIFT)
+#define TRANSFER_DIRECTION BIT(0)
+
+// PIO_TRANSFER_STATUS register
+
+#define WR_FIFO_BYTES_SHIFT 16
+#define WR_FIFO_BYTES_MASK (0xFFFF << WR_FIFO_BYTES_SHIFT)
+
+// RD_FIFO_CONFIG register
+
+#define CONTINUOUS_MODE BIT(0)
+
+// RD_FIFO_STATUS register
+
+#define FIFO_EMPTY BIT(11)
+#define WR_CNTS_SHIFT 4
+#define WR_CNTS_MASK (0x7F << WR_CNTS_SHIFT)
+#define RDY_64BYTE BIT(3)
+#define RDY_32BYTE BIT(2)
+#define RDY_16BYTE BIT(1)
+#define FIFO_RDY BIT(0)
+
+// RD_FIFO_RESET register
+
+#define RESET_FIFO BIT(0)
+
+#define QSPI_MAX_PACKET_COUNT 0xFFC0
+
+void quadspi_init(uint32_t hz);
+int sc7180_claim_bus(const struct spi_slave *slave);
+int sc7180_setup_bus(const struct spi_slave *slave);
+void sc7180_release_bus(const struct spi_slave *slave);
+int sc7180_xfer(const struct spi_slave *slave, const void *dout,
+		size_t out_bytes, void *din, size_t in_bytes);
+int sc7180_xfer_dual(const struct spi_slave *slave, const void *dout,
+		     size_t out_bytes, void *din, size_t in_bytes);
+#endif /* __SOC_QUALCOMM_SC7180_QSPI_H__ */