intel: Add driver for QSPI

To support the enablement of QSPI booting

Signed-off-by: Muhammad Hadi Asyrafi Abdul Halim <muhammad.hadi.asyrafi.abdul.halim@intel.com>

2 files changed, 999 insertions, 0 deletions

diff --git a/plat/intel/soc/stratix10/drivers/qspi/cadence_qspi.c b/plat/intel/soc/stratix10/drivers/qspi/cadence_qspi.c
new file mode 100644
index 00000000..506a633b
--- /dev/null
+++ b/plat/intel/soc/stratix10/drivers/qspi/cadence_qspi.c
@@ -0,0 +1,824 @@
+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <string.h>
+#include <drivers/delay_timer.h>
+#include <drivers/console.h>
+
+#include "cadence_qspi.h"
+#include <platform_def.h>
+
+#define LESS(a, b)   (((a) < (b)) ? (a) : (b))
+#define MORE(a, b)   (((a) > (b)) ? (a) : (b))
+
+
+uint32_t qspi_device_size;
+int cad_qspi_cs;
+
+int cad_qspi_idle(void)
+{
+	return (mmio_read_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG)
+			& CAD_QSPI_CFG_IDLE) >> 31;
+}
+
+int cad_qspi_set_baudrate_div(uint32_t div)
+{
+	if (div > 0xf)
+		return CAD_INVALID;
+
+	mmio_clrsetbits_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG,
+			~CAD_QSPI_CFG_BAUDDIV_MSK,
+			CAD_QSPI_CFG_BAUDDIV(div));
+
+	return 0;
+}
+
+int cad_qspi_configure_dev_size(uint32_t addr_bytes,
+		uint32_t bytes_per_dev, uint32_t bytes_per_block)
+{
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_DEVSZ,
+			CAD_QSPI_DEVSZ_ADDR_BYTES(addr_bytes) |
+			CAD_QSPI_DEVSZ_BYTES_PER_PAGE(bytes_per_dev) |
+			CAD_QSPI_DEVSZ_BYTES_PER_BLOCK(bytes_per_block));
+	return 0;
+}
+
+int cad_qspi_set_read_config(uint32_t opcode, uint32_t instr_type,
+		uint32_t addr_type, uint32_t data_type,
+		uint32_t mode_bit, uint32_t dummy_clk_cycle)
+{
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_DEVRD,
+			CAD_QSPI_DEV_OPCODE(opcode) |
+			CAD_QSPI_DEV_INST_TYPE(instr_type) |
+			CAD_QSPI_DEV_ADDR_TYPE(addr_type) |
+			CAD_QSPI_DEV_DATA_TYPE(data_type) |
+			CAD_QSPI_DEV_MODE_BIT(mode_bit) |
+			CAD_QSPI_DEV_DUMMY_CLK_CYCLE(dummy_clk_cycle));
+
+	return 0;
+}
+
+int cat_qspi_set_write_config(uint32_t addr_type, uint32_t data_type,
+		uint32_t mode_bit, uint32_t dummy_clk_cycle)
+{
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_DEVWR,
+			CAD_QSPI_DEV_ADDR_TYPE(addr_type) |
+			CAD_QSPI_DEV_DATA_TYPE(data_type) |
+			CAD_QSPI_DEV_MODE_BIT(mode_bit) |
+			CAD_QSPI_DEV_DUMMY_CLK_CYCLE(dummy_clk_cycle));
+
+	return 0;
+}
+
+int cad_qspi_timing_config(uint32_t clkphase, uint32_t clkpol, uint32_t csda,
+		uint32_t csdads, uint32_t cseot, uint32_t cssot,
+		uint32_t rddatacap)
+{
+	uint32_t cfg = mmio_read_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG);
+
+	cfg &= CAD_QSPI_CFG_SELCLKPHASE_CLR_MSK &
+		CAD_QSPI_CFG_SELCLKPOL_CLR_MSK;
+	cfg |= CAD_QSPI_SELCLKPHASE(clkphase) | CAD_QSPI_SELCLKPOL(clkpol);
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG, cfg);
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_DELAY,
+		CAD_QSPI_DELAY_CSSOT(cssot) | CAD_QSPI_DELAY_CSEOT(cseot) |
+		CAD_QSPI_DELAY_CSDADS(csdads) | CAD_QSPI_DELAY_CSDA(csda));
+
+	return 0;
+}
+
+int cad_qspi_stig_cmd_helper(int cs, uint32_t cmd)
+{
+	uint32_t count = 0;
+
+	/* chip select */
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG,
+			(mmio_read_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG)
+			 & CAD_QSPI_CFG_CS_MSK) | CAD_QSPI_CFG_CS(cs));
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_FLASHCMD, cmd);
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_FLASHCMD,
+			cmd | CAD_QSPI_FLASHCMD_EXECUTE);
+
+	do {
+		uint32_t reg = mmio_read_32(CAD_QSPI_OFFSET +
+					CAD_QSPI_FLASHCMD);
+		if (!(reg & CAD_QSPI_FLASHCMD_EXECUTE_STAT))
+			break;
+		count++;
+	} while (count < CAD_QSPI_COMMAND_TIMEOUT);
+
+	if (count >= CAD_QSPI_COMMAND_TIMEOUT) {
+		ERROR("Error sending QSPI command %x, timed out\n",
+				cmd);
+		return CAD_QSPI_ERROR;
+	}
+
+	return 0;
+}
+
+int cad_qspi_stig_cmd(uint32_t opcode, uint32_t dummy)
+{
+	if (dummy > ((1 << CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES_MAX) - 1)) {
+		ERROR("Faulty dummy bytes\n");
+		return -1;
+	}
+
+	return cad_qspi_stig_cmd_helper(cad_qspi_cs,
+			CAD_QSPI_FLASHCMD_OPCODE(opcode) |
+			CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES(dummy));
+}
+
+int cad_qspi_stig_read_cmd(uint32_t opcode, uint32_t dummy, uint32_t num_bytes,
+		uint32_t *output)
+{
+	if (dummy > ((1 << CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES_MAX) - 1)) {
+		ERROR("Faulty dummy byes\n");
+		return -1;
+	}
+
+	if ((num_bytes > 8) || (num_bytes == 0))
+		return -1;
+
+	uint32_t cmd =
+		CAD_QSPI_FLASHCMD_OPCODE(opcode) |
+		CAD_QSPI_FLASHCMD_ENRDDATA(1) |
+		CAD_QSPI_FLASHCMD_NUMRDDATABYTES(num_bytes - 1) |
+		CAD_QSPI_FLASHCMD_ENCMDADDR(0) |
+		CAD_QSPI_FLASHCMD_ENMODEBIT(0) |
+		CAD_QSPI_FLASHCMD_NUMADDRBYTES(0) |
+		CAD_QSPI_FLASHCMD_ENWRDATA(0) |
+		CAD_QSPI_FLASHCMD_NUMWRDATABYTES(0) |
+		CAD_QSPI_FLASHCMD_NUMDUMMYBYTES(dummy);
+
+	if (cad_qspi_stig_cmd_helper(cad_qspi_cs, cmd)) {
+		ERROR("failed to send stig cmd");
+		return -1;
+	}
+
+	output[0] = mmio_read_32(CAD_QSPI_OFFSET + CAD_QSPI_FLASHCMD_RDDATA0);
+
+	if (num_bytes > 4) {
+		output[1] = mmio_read_32(CAD_QSPI_OFFSET +
+				CAD_QSPI_FLASHCMD_RDDATA1);
+	}
+
+	return 0;
+}
+
+int cad_qspi_stig_wr_cmd(uint32_t opcode, uint32_t dummy, uint32_t num_bytes,
+		uint32_t *input)
+{
+	if (dummy > ((1 << CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES_MAX) - 1)) {
+		ERROR("Faulty dummy byes\n");
+		return -1;
+	}
+
+	if ((num_bytes > 8) || (num_bytes == 0))
+		return -1;
+
+	uint32_t cmd = CAD_QSPI_FLASHCMD_OPCODE(opcode) |
+		CAD_QSPI_FLASHCMD_ENRDDATA(0) |
+		CAD_QSPI_FLASHCMD_NUMRDDATABYTES(0) |
+		CAD_QSPI_FLASHCMD_ENCMDADDR(0) |
+		CAD_QSPI_FLASHCMD_ENMODEBIT(0) |
+		CAD_QSPI_FLASHCMD_NUMADDRBYTES(0) |
+		CAD_QSPI_FLASHCMD_ENWRDATA(1) |
+		CAD_QSPI_FLASHCMD_NUMWRDATABYTES(num_bytes - 1) |
+		CAD_QSPI_FLASHCMD_NUMDUMMYBYTES(dummy);
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_FLASHCMD_WRDATA0, input[0]);
+
+	if (num_bytes > 4)
+		mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_FLASHCMD_WRDATA1,
+				input[1]);
+
+	return cad_qspi_stig_cmd_helper(cad_qspi_cs, cmd);
+}
+
+int cad_qspi_stig_addr_cmd(uint32_t opcode, uint32_t dummy, uint32_t addr)
+{
+	uint32_t cmd;
+
+	if (dummy > ((1 << CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES_MAX) - 1))
+		return -1;
+
+	cmd = CAD_QSPI_FLASHCMD_OPCODE(opcode) |
+		CAD_QSPI_FLASHCMD_NUMDUMMYBYTES(dummy) |
+		CAD_QSPI_FLASHCMD_ENCMDADDR(1) |
+		CAD_QSPI_FLASHCMD_NUMADDRBYTES(2);
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_FLASHCMD_ADDR, addr);
+
+	return cad_qspi_stig_cmd_helper(cad_qspi_cs, cmd);
+}
+
+int cad_qspi_device_bank_select(uint32_t bank)
+{
+	int status = 0;
+
+	status = cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_WREN, 0);
+	if (status != 0)
+		return status;
+
+	status = cad_qspi_stig_wr_cmd(CAD_QSPI_STIG_OPCODE_WREN_EXT_REG,
+			0, 1, &bank);
+	if (status != 0)
+		return status;
+
+	return cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_WRDIS, 0);
+}
+
+int cad_qspi_device_status(uint32_t *status)
+{
+	return cad_qspi_stig_read_cmd(CAD_QSPI_STIG_OPCODE_RDSR, 0, 1, status);
+}
+
+#if CAD_QSPI_MICRON_N25Q_SUPPORT
+int cad_qspi_n25q_enable(void)
+{
+	cad_qspi_set_read_config(QSPI_FAST_READ, CAD_QSPI_INST_SINGLE,
+			CAD_QSPI_ADDR_FASTREAD, CAT_QSPI_ADDR_SINGLE_IO, 1,
+			0);
+	return 0;
+}
+
+int cad_qspi_n25q_wait_for_program_and_erase(int program_only)
+{
+	uint32_t status, flag_sr;
+	int count = 0;
+
+	while (count < CAD_QSPI_COMMAND_TIMEOUT) {
+		status = cad_qspi_device_status(&status);
+		if (status != 0) {
+			ERROR("Error getting device status\n");
+			return -1;
+		}
+		if (!CAD_QSPI_STIG_SR_BUSY(status))
+			break;
+		count++;
+	}
+
+	if (count >= CAD_QSPI_COMMAND_TIMEOUT) {
+		ERROR("Timed out waiting for idle\n");
+		return -1;
+	}
+
+	count = 0;
+
+	while (count < CAD_QSPI_COMMAND_TIMEOUT) {
+		status = cad_qspi_stig_read_cmd(CAD_QSPI_STIG_OPCODE_RDFLGSR,
+				0, 1, &flag_sr);
+		if (status != 0) {
+			ERROR("Error waiting program and erase.\n");
+			return status;
+		}
+
+		if ((program_only &&
+			CAD_QSPI_STIG_FLAGSR_PROGRAMREADY(flag_sr)) ||
+			(!program_only &&
+			CAD_QSPI_STIG_FLAGSR_ERASEREADY(flag_sr)))
+			break;
+	}
+
+	if (count >= CAD_QSPI_COMMAND_TIMEOUT)
+		ERROR("Timed out waiting for program and erase\n");
+
+	if ((program_only && CAD_QSPI_STIG_FLAGSR_PROGRAMERROR(flag_sr)) ||
+			(!program_only &&
+			CAD_QSPI_STIG_FLAGSR_ERASEERROR(flag_sr))) {
+		ERROR("Error programming/erasing flash\n");
+		cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_CLFSR, 0);
+		return -1;
+	}
+
+	return 0;
+}
+#endif
+
+int cad_qspi_indirect_read_start_bank(uint32_t flash_addr, uint32_t num_bytes)
+{
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_INDRDSTADDR, flash_addr);
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_INDRDCNT, num_bytes);
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_INDRD,
+			CAD_QSPI_INDRD_START |
+			CAD_QSPI_INDRD_IND_OPS_DONE);
+
+	return 0;
+}
+
+
+int cad_qspi_indirect_write_start_bank(uint32_t flash_addr,
+					uint32_t num_bytes)
+{
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_INDWRSTADDR, flash_addr);
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_INDWRCNT, num_bytes);
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_INDWR,
+			CAD_QSPI_INDWR_START |
+			CAD_QSPI_INDWR_INDDONE);
+
+	return 0;
+}
+
+int cad_qspi_indirect_write_finish(void)
+{
+#if CAD_QSPI_MICRON_N25Q_SUPPORT
+	return cad_qspi_n25q_wait_for_program_and_erase(1);
+#else
+	return 0;
+#endif
+
+}
+
+int cad_qspi_enable(void)
+{
+	int status;
+
+	mmio_setbits_32(CAD_QSPI_OFFSET + CAD_QSPI_CFG, CAD_QSPI_CFG_ENABLE);
+
+#if CAD_QSPI_MICRON_N25Q_SUPPORT
+	status = cad_qspi_n25q_enable();
+	if (status != 0)
+		return status;
+#endif
+	return 0;
+}
+
+int cad_qspi_enable_subsector_bank(uint32_t addr)
+{
+	int status = 0;
+
+	status = cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_WREN, 0);
+	if (status != 0)
+		return status;
+
+	status = cad_qspi_stig_addr_cmd(CAD_QSPI_STIG_OPCODE_SUBSEC_ERASE, 0,
+					addr);
+	if (status != 0)
+		return status;
+
+#if CAD_QSPI_MICRON_N25Q_SUPPORT
+	status = cad_qspi_n25q_wait_for_program_and_erase(0);
+#endif
+	return status;
+}
+
+int cad_qspi_erase_subsector(uint32_t addr)
+{
+	int status = 0;
+
+	status = cad_qspi_device_bank_select(addr >> 24);
+	if (status != 0)
+		return status;
+
+	return cad_qspi_enable_subsector_bank(addr);
+}
+
+int cad_qspi_erase_sector(uint32_t addr)
+{
+	int status = 0;
+
+	status = cad_qspi_device_bank_select(addr >> 24);
+	if (status != 0)
+		return status;
+
+	status = cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_WREN, 0);
+	if (status != 0)
+		return status;
+
+	status = cad_qspi_stig_addr_cmd(CAD_QSPI_STIG_OPCODE_SEC_ERASE, 0,
+					addr);
+	if (status != 0)
+		return status;
+
+#if CAD_QSPI_MICRON_N25Q_SUPPORT
+	status = cad_qspi_n25q_wait_for_program_and_erase(0);
+#endif
+	return status;
+}
+
+void cad_qspi_calibration(uint32_t dev_clk, uint32_t qspi_clk_mhz)
+{
+	int status;
+	uint32_t dev_sclk_mhz = 27; /*min value to get biggest 0xF div factor*/
+	uint32_t data_cap_delay;
+	uint32_t sample_rdid;
+	uint32_t rdid;
+	uint32_t div_actual;
+	uint32_t div_bits;
+	int first_pass, last_pass;
+
+	/*1.  Set divider to bigger value (slowest SCLK)
+	 *2.  RDID and save the value
+	 */
+	div_actual = (qspi_clk_mhz + (dev_sclk_mhz - 1)) / dev_sclk_mhz;
+	div_bits = (((div_actual + 1) / 2) - 1);
+	status = cad_qspi_set_baudrate_div(0xf);
+
+	status = cad_qspi_stig_read_cmd(CAD_QSPI_STIG_OPCODE_RDID,
+					0, 3, &sample_rdid);
+	if (status != 0)
+		return;
+
+	/*3. Set divider to the intended frequency
+	 *4.  Set the read delay = 0
+	 *5.  RDID and check whether the value is same as item 2
+	 *6.  Increase read delay and compared the value against item 2
+	 *7.  Find the range of read delay that have same as
+	 *    item 2 and divide it to 2
+	 */
+	div_actual = (qspi_clk_mhz + (dev_clk - 1)) / dev_clk;
+	div_bits = (((div_actual + 1) / 2) - 1);
+	status = cad_qspi_set_baudrate_div(div_bits);
+	if (status != 0)
+		return;
+
+	data_cap_delay = 0;
+	first_pass = -1;
+	last_pass = -1;
+
+	do {
+		if (status != 0)
+			break;
+		status = cad_qspi_stig_read_cmd(CAD_QSPI_STIG_OPCODE_RDID, 0,
+						3, &rdid);
+		if (status != 0)
+			break;
+		if (rdid == sample_rdid) {
+			if (first_pass == -1)
+				first_pass = data_cap_delay;
+			else
+				last_pass = data_cap_delay;
+		}
+
+		data_cap_delay++;
+
+		mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_RDDATACAP,
+				CAD_QSPI_RDDATACAP_BYP(1) |
+				CAD_QSPI_RDDATACAP_DELAY(data_cap_delay));
+
+	} while (data_cap_delay < 0x10);
+
+	if (first_pass > 0) {
+		int diff = first_pass - last_pass;
+
+		data_cap_delay = first_pass + diff / 2;
+	}
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_RDDATACAP,
+			CAD_QSPI_RDDATACAP_BYP(1) |
+			CAD_QSPI_RDDATACAP_DELAY(data_cap_delay));
+	status = cad_qspi_stig_read_cmd(CAD_QSPI_STIG_OPCODE_RDID, 0, 3, &rdid);
+
+	if (status != 0)
+		return;
+}
+
+int cad_qspi_int_disable(uint32_t mask)
+{
+	if (cad_qspi_idle() == 0)
+		return -1;
+
+	if ((CAD_QSPI_INT_STATUS_ALL & mask) == 0)
+		return -1;
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_IRQMSK, mask);
+	return 0;
+}
+
+void cad_qspi_set_chip_select(int cs)
+{
+	cad_qspi_cs = cs;
+}
+
+int cad_qspi_init(uint32_t desired_clk_freq, uint32_t clk_phase,
+			uint32_t clk_pol, uint32_t csda, uint32_t csdads,
+			uint32_t cseot, uint32_t cssot, uint32_t rddatacap)
+{
+	int status = 0;
+	uint32_t qspi_desired_clk_freq;
+	uint32_t rdid = 0;
+	uint32_t cap_code;
+
+	INFO("Initializing Qspi\n");
+
+	if (cad_qspi_idle() == 0) {
+		ERROR("device not idle");
+		return -1;
+	}
+
+
+	status = cad_qspi_timing_config(clk_phase, clk_pol, csda, csdads,
+					cseot, cssot, rddatacap);
+
+	if (status != 0) {
+		ERROR("config set timing failure\n");
+		return status;
+	}
+
+	mmio_write_32(CAD_QSPI_OFFSET + CAD_QSPI_REMAPADDR,
+			CAD_QSPI_REMAPADDR_VALUE_SET(0));
+
+	status = cad_qspi_int_disable(CAD_QSPI_INT_STATUS_ALL);
+	if (status != 0) {
+		ERROR("failed disable\n");
+		return status;
+	}
+
+	cad_qspi_set_baudrate_div(0xf);
+	status = cad_qspi_enable();
+	if (status != 0) {
+		ERROR("failed enable\n");
+		return status;
+	}
+
+	qspi_desired_clk_freq = 100;
+	cad_qspi_calibration(qspi_desired_clk_freq, 50000000);
+
+	status = cad_qspi_stig_read_cmd(CAD_QSPI_STIG_OPCODE_RDID, 0, 3,
+					&rdid);
+
+	if (status != 0) {
+		ERROR("Error reading RDID\n");
+		return status;
+	}
+
+	/*
+	 * NOTE: The Size code seems to be a form of BCD (binary coded decimal).
+	 * The first nibble is the 10's digit and the second nibble is the 1's
+	 * digit in the number of bytes.
+	 *
+	 * Capacity ID samples:
+	 * 0x15 :   16 Mb =>   2 MiB => 1 << 21 ; BCD=15
+	 * 0x16 :   32 Mb =>   4 MiB => 1 << 22 ; BCD=16
+	 * 0x17 :   64 Mb =>   8 MiB => 1 << 23 ; BCD=17
+	 * 0x18 :  128 Mb =>  16 MiB => 1 << 24 ; BCD=18
+	 * 0x19 :  256 Mb =>  32 MiB => 1 << 25 ; BCD=19
+	 * 0x1a
+	 * 0x1b
+	 * 0x1c
+	 * 0x1d
+	 * 0x1e
+	 * 0x1f
+	 * 0x20 :  512 Mb =>  64 MiB => 1 << 26 ; BCD=20
+	 * 0x21 : 1024 Mb => 128 MiB => 1 << 27 ; BCD=21
+	 */
+
+	cap_code = CAD_QSPI_STIG_RDID_CAPACITYID(rdid);
+
+	if (!(((cap_code >> 4) > 0x9) || ((cap_code & 0xf) > 0x9))) {
+		uint32_t decoded_cap = ((cap_code >> 4) * 10) +
+					(cap_code & 0xf);
+		qspi_device_size = 1 << (decoded_cap + 6);
+		INFO("QSPI Capacity: %x\n\n", qspi_device_size);
+
+	} else {
+		ERROR("Invalid CapacityID encountered: 0x%02x\n",
+				cap_code);
+		return -1;
+	}
+
+	cad_qspi_configure_dev_size(S10_QSPI_ADDR_BYTES,
+				S10_QSPI_BYTES_PER_DEV, S10_BYTES_PER_BLOCK);
+
+	INFO("Flash size: %d Bytes\n", qspi_device_size);
+
+	return status;
+}
+
+int cad_qspi_indirect_page_bound_write(uint32_t offset,
+		uint8_t *buffer, uint32_t len)
+{
+	int status = 0, i;
+	uint32_t write_count, write_capacity, *write_data, space,
+		write_fill_level, sram_partition;
+
+	status = cad_qspi_indirect_write_start_bank(offset, len);
+	if (status != 0)
+		return status;
+
+	write_count = 0;
+	sram_partition = CAD_QSPI_SRAMPART_ADDR(mmio_read_32(CAD_QSPI_OFFSET +
+			 CAD_QSPI_SRAMPART));
+	write_capacity = (uint32_t) CAD_QSPI_SRAM_FIFO_ENTRY_COUNT -
+			sram_partition;
+
+	while (write_count < len) {
+		write_fill_level = CAD_QSPI_SRAMFILL_INDWRPART(
+					mmio_read_32(CAD_QSPI_OFFSET +
+							CAD_QSPI_SRAMFILL));
+		space = LESS(write_capacity - write_fill_level,
+				(len - write_count) / sizeof(uint32_t));
+		write_data = (uint32_t *)(buffer + write_count);
+		for (i = 0; i < space; ++i)
+			mmio_write_32(CAD_QSPIDATA_OFST, *write_data++);
+
+		write_count += space * sizeof(uint32_t);
+	}
+	return cad_qspi_indirect_write_finish();
+}
+
+int cad_qspi_read_bank(uint8_t *buffer, uint32_t offset, uint32_t size)
+{
+	int status;
+	uint32_t read_count = 0, *read_data;
+	int level = 1, count = 0, i;
+
+	status = cad_qspi_indirect_read_start_bank(offset, size);
+
+	if (status != 0)
+		return status;
+
+	while (read_count < size) {
+		do {
+			level = CAD_QSPI_SRAMFILL_INDRDPART(
+				mmio_read_32(CAD_QSPI_OFFSET +
+					CAD_QSPI_SRAMFILL));
+			read_data = (uint32_t *)(buffer + read_count);
+			for (i = 0; i < level; ++i)
+				*read_data++ = mmio_read_32(CAD_QSPIDATA_OFST);
+
+			read_count += level * sizeof(uint32_t);
+			count++;
+		} while (level > 0);
+	}
+
+	return 0;
+}
+
+int cad_qspi_write_bank(uint32_t offset, uint8_t *buffer, uint32_t size)
+{
+	int status = 0;
+	uint32_t page_offset  = offset & (CAD_QSPI_PAGE_SIZE - 1);
+	uint32_t write_size = LESS(size, CAD_QSPI_PAGE_SIZE - page_offset);
+
+	while (size) {
+		status = cad_qspi_indirect_page_bound_write(offset, buffer,
+							write_size);
+		if (status != 0)
+			break;
+
+		offset  += write_size;
+		buffer  += write_size;
+		size -= write_size;
+		write_size = LESS(size, CAD_QSPI_PAGE_SIZE);
+	}
+	return status;
+}
+
+int cad_qspi_read(void *buffer, uint32_t  offset, uint32_t  size)
+{
+	uint32_t bank_count, bank_addr, bank_offset, copy_len;
+	uint8_t *read_data;
+	int i, status;
+
+	status = 0;
+
+	if ((offset >= qspi_device_size) ||
+			(offset + size - 1 >= qspi_device_size) ||
+			(size == 0) ||
+			((long) ((int *)buffer) & 0x3)  ||
+			(offset & 0x3) ||
+			(size & 0x3)) {
+		ERROR("Invalid read parameter");
+		return -1;
+	}
+
+	if (CAD_QSPI_INDRD_RD_STAT(mmio_read_32(CAD_QSPI_OFFSET +
+						CAD_QSPI_INDRD))) {
+		ERROR("Read in progress");
+		return -1;
+	}
+
+	/*
+	 * bank_count : Number of bank(s) affected, including partial banks.
+	 * bank_addr  : Aligned address of the first bank,
+	 *		including partial bank.
+	 * bank_ofst  : The offset of the bank to read.
+	 *		Only used when reading the first bank.
+	 */
+	bank_count = CAD_QSPI_BANK_ADDR(offset + size - 1) -
+			CAD_QSPI_BANK_ADDR(offset) + 1;
+	bank_addr  = offset & CAD_QSPI_BANK_ADDR_MSK;
+	bank_offset  = offset & (CAD_QSPI_BANK_SIZE - 1);
+
+	read_data = (uint8_t *)buffer;
+
+	copy_len = LESS(size, CAD_QSPI_BANK_SIZE - bank_offset);
+
+	for (i = 0; i < bank_count; ++i) {
+		status = cad_qspi_device_bank_select(CAD_QSPI_BANK_ADDR(
+								bank_addr));
+		if (status != 0)
+			break;
+		status = cad_qspi_read_bank(read_data, bank_offset, copy_len);
+		if (status != 0)
+			break;
+
+		bank_addr += CAD_QSPI_BANK_SIZE;
+		read_data += copy_len;
+		size -= copy_len;
+		bank_offset = 0;
+		copy_len = LESS(size, CAD_QSPI_BANK_SIZE);
+	}
+
+	return status;
+}
+
+int cad_qspi_erase(uint32_t offset, uint32_t size)
+{
+	int status = 0;
+	uint32_t subsector_offset  = offset & (CAD_QSPI_SUBSECTOR_SIZE - 1);
+	uint32_t erase_size = LESS(size,
+				CAD_QSPI_SUBSECTOR_SIZE - subsector_offset);
+
+	while (size) {
+		status = cad_qspi_erase_subsector(offset);
+		if (status != 0)
+			break;
+
+		offset  += erase_size;
+		size -= erase_size;
+		erase_size = LESS(size, CAD_QSPI_SUBSECTOR_SIZE);
+	}
+	return status;
+}
+
+int cad_qspi_write(void *buffer, uint32_t offset, uint32_t size)
+{
+	int status, i;
+	uint32_t bank_count, bank_addr, bank_offset, copy_len;
+	uint8_t *write_data;
+
+	status = 0;
+
+	if ((offset >= qspi_device_size) ||
+			(offset + size - 1 >= qspi_device_size) ||
+			(size == 0) ||
+			((long)buffer & 0x3)  ||
+			(offset & 0x3) ||
+			(size & 0x3))
+		return -2;
+
+	if (CAD_QSPI_INDWR_RDSTAT(mmio_read_32(CAD_QSPI_OFFSET +
+						CAD_QSPI_INDWR))) {
+		ERROR("QSPI Error: Write in progress\n");
+		return -1;
+	}
+
+	bank_count = CAD_QSPI_BANK_ADDR(offset + size - 1) -
+			CAD_QSPI_BANK_ADDR(offset) + 1;
+	bank_addr = offset & CAD_QSPI_BANK_ADDR_MSK;
+	bank_offset = offset & (CAD_QSPI_BANK_SIZE - 1);
+
+	write_data = buffer;
+
+	copy_len = LESS(size, CAD_QSPI_BANK_SIZE - bank_offset);
+
+	for (i = 0; i < bank_count; ++i) {
+		status = cad_qspi_device_bank_select(
+				CAD_QSPI_BANK_ADDR(bank_addr));
+		if (status != 0)
+			break;
+
+		status = cad_qspi_write_bank(bank_offset, write_data,
+						copy_len);
+		if (status != 0)
+			break;
+
+		bank_addr += CAD_QSPI_BANK_SIZE;
+		write_data += copy_len;
+		size -= copy_len;
+		bank_offset = 0;
+
+		copy_len = LESS(size, CAD_QSPI_BANK_SIZE);
+	}
+	return status;
+}
+
+int cad_qspi_update(void *Buffer, uint32_t offset, uint32_t size)
+{
+	int status = 0;
+
+	status = cad_qspi_erase(offset, size);
+	if (status != 0)
+		return status;
+
+	return cad_qspi_write(Buffer, offset, size);
+}
+
+void cad_qspi_reset(void)
+{
+	cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_RESET_EN, 0);
+	cad_qspi_stig_cmd(CAD_QSPI_STIG_OPCODE_RESET_MEM, 0);
+}
+
diff --git a/plat/intel/soc/stratix10/drivers/qspi/cadence_qspi.h b/plat/intel/soc/stratix10/drivers/qspi/cadence_qspi.h
new file mode 100644
index 00000000..e419161c
--- /dev/null
+++ b/plat/intel/soc/stratix10/drivers/qspi/cadence_qspi.h
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __CAD_QSPI_H__
+#define __CAD_QSPI_H__
+
+#define CAD_QSPI_MICRON_N25Q_SUPPORT		1
+
+#define CAD_QSPI_OFFSET				0xff8d2000
+
+#define CAD_INVALID				-1
+#define CAD_QSPI_ERROR				-2
+
+#define CAD_QSPI_ADDR_FASTREAD			0
+#define CAD_QSPI_ADDR_FASTREAD_DUAL_IO		1
+#define CAD_QSPI_ADDR_FASTREAD_QUAD_IO		2
+#define CAT_QSPI_ADDR_SINGLE_IO			0
+#define CAT_QSPI_ADDR_DUAL_IO			1
+#define CAT_QSPI_ADDR_QUAD_IO			2
+
+#define CAD_QSPI_BANK_ADDR(x)			((x) >> 24)
+#define CAD_QSPI_BANK_ADDR_MSK			0xff000000
+
+#define CAD_QSPI_COMMAND_TIMEOUT		0x10000000
+
+#define CAD_QSPI_CFG				0x0
+#define CAD_QSPI_CFG_BAUDDIV_MSK		0xff87ffff
+#define CAD_QSPI_CFG_BAUDDIV(x)			(((x) << 19) & 0x780000)
+#define CAD_QSPI_CFG_CS_MSK			~0x3c00
+#define CAD_QSPI_CFG_CS(x)			(((x) << 11))
+#define CAD_QSPI_CFG_ENABLE			(1 << 0)
+#define CAD_QSPI_CFG_ENDMA_CLR_MSK		0xffff7fff
+#define CAD_QSPI_CFG_IDLE			(1 << 31)
+#define CAD_QSPI_CFG_SELCLKPHASE_CLR_MSK	0xfffffffb
+#define CAD_QSPI_CFG_SELCLKPOL_CLR_MSK		0xfffffffd
+
+#define CAD_QSPIDATA_OFST			0xff900000
+
+#define CAD_QSPI_DELAY				0xc
+#define CAD_QSPI_DELAY_CSSOT(x)			(((x) & 0xff) << 0)
+#define CAD_QSPI_DELAY_CSEOT(x)			(((x) & 0xff) << 8)
+#define CAD_QSPI_DELAY_CSDADS(x)		(((x) & 0xff) << 16)
+#define CAD_QSPI_DELAY_CSDA(x)			(((x) & 0xff) << 24)
+
+#define CAD_QSPI_DEVSZ				0x14
+#define CAD_QSPI_DEVSZ_ADDR_BYTES(x)		((x) << 0)
+#define CAD_QSPI_DEVSZ_BYTES_PER_PAGE(x)	((x) << 4)
+#define CAD_QSPI_DEVSZ_BYTES_PER_BLOCK(x)	((x) << 16)
+
+#define CAD_QSPI_DEVWR				0x8
+#define CAD_QSPI_DEVRD				0x4
+#define CAD_QSPI_DEV_OPCODE(x)			(((x) & 0xff) << 0)
+#define CAD_QSPI_DEV_INST_TYPE(x)		(((x) & 0x03) << 8)
+#define CAD_QSPI_DEV_ADDR_TYPE(x)		(((x) & 0x03) << 12)
+#define CAD_QSPI_DEV_DATA_TYPE(x)		(((x) & 0x03) << 16)
+#define CAD_QSPI_DEV_MODE_BIT(x)		(((x) & 0x01) << 20)
+#define CAD_QSPI_DEV_DUMMY_CLK_CYCLE(x)		(((x) & 0x0f) << 24)
+
+#define CAD_QSPI_FLASHCMD			0x90
+#define CAD_QSPI_FLASHCMD_ADDR			0x94
+#define CAD_QSPI_FLASHCMD_EXECUTE		0x1
+#define CAD_QSPI_FLASHCMD_EXECUTE_STAT		0x2
+#define CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES_MAX	5
+#define CAD_QSPI_FLASHCMD_NUM_DUMMYBYTES(x)	(((x) << 7) & 0x000f80)
+#define CAD_QSPI_FLASHCMD_OPCODE(x)		(((x) & 0xff) << 24)
+#define CAD_QSPI_FLASHCMD_ENRDDATA(x)		(((x) & 1) << 23)
+#define CAD_QSPI_FLASHCMD_NUMRDDATABYTES(x)	(((x) & 0xf) << 20)
+#define CAD_QSPI_FLASHCMD_ENCMDADDR(x)		(((x) & 1) << 19)
+#define CAD_QSPI_FLASHCMD_ENMODEBIT(x)		(((x) & 1) << 18)
+#define CAD_QSPI_FLASHCMD_NUMADDRBYTES(x)	(((x) & 0x3) << 16)
+#define CAD_QSPI_FLASHCMD_ENWRDATA(x)		(((x) & 1) << 15)
+#define CAD_QSPI_FLASHCMD_NUMWRDATABYTES(x)	(((x) & 0x7) << 12)
+#define CAD_QSPI_FLASHCMD_NUMDUMMYBYTES(x)	(((x) & 0x1f) << 7)
+#define CAD_QSPI_FLASHCMD_RDDATA0		0xa0
+#define CAD_QSPI_FLASHCMD_RDDATA1		0xa4
+#define CAD_QSPI_FLASHCMD_WRDATA0		0xa8
+#define CAD_QSPI_FLASHCMD_WRDATA1		0xac
+
+#define CAD_QSPI_RDDATACAP			0x10
+#define CAD_QSPI_RDDATACAP_BYP(x)		(((x) & 1) << 0)
+#define CAD_QSPI_RDDATACAP_DELAY(x)		(((x) & 0xf) << 1)
+
+#define CAD_QSPI_REMAPADDR			0x24
+#define CAD_QSPI_REMAPADDR_VALUE_SET(x)		(((x) & 0xffffffff) << 0)
+
+#define CAD_QSPI_SRAMPART			0x18
+#define CAD_QSPI_SRAMFILL			0x2c
+#define CAD_QSPI_SRAMPART_ADDR(x)		(((x) >> 0) & 0x3ff)
+#define CAD_QSPI_SRAM_FIFO_ENTRY_COUNT		(512 / sizeof(uint32_t))
+#define CAD_QSPI_SRAMFILL_INDWRPART(x)		(((x) >> 16) & 0x00ffff)
+#define CAD_QSPI_SRAMFILL_INDRDPART(x)		(((x) >> 0) & 0x00ffff)
+
+#define CAD_QSPI_SELCLKPHASE(x)			(((x) & 1) << 2)
+#define CAD_QSPI_SELCLKPOL(x)			(((x) & 1) << 1)
+
+#define CAD_QSPI_STIG_FLAGSR_PROGRAMREADY(x)	(((x) >> 7) & 1)
+#define CAD_QSPI_STIG_FLAGSR_ERASEREADY(x)	(((x) >> 7) & 1)
+#define CAD_QSPI_STIG_FLAGSR_ERASEERROR(x)	(((x) >> 5) & 1)
+#define CAD_QSPI_STIG_FLAGSR_PROGRAMERROR(x)	(((x) >> 4) & 1)
+#define CAD_QSPI_STIG_OPCODE_CLFSR		0x50
+#define CAD_QSPI_STIG_OPCODE_RDID		0x9f
+#define CAD_QSPI_STIG_OPCODE_WRDIS		0x4
+#define CAD_QSPI_STIG_OPCODE_WREN		0x6
+#define CAD_QSPI_STIG_OPCODE_SUBSEC_ERASE	0x20
+#define CAD_QSPI_STIG_OPCODE_SEC_ERASE		0xd8
+#define CAD_QSPI_STIG_OPCODE_WREN_EXT_REG	0xc5
+#define CAD_QSPI_STIG_OPCODE_DIE_ERASE		0xc4
+#define CAD_QSPI_STIG_OPCODE_BULK_ERASE		0xc7
+#define CAD_QSPI_STIG_OPCODE_RDSR		0x5
+#define CAD_QSPI_STIG_OPCODE_RDFLGSR		0x70
+#define CAD_QSPI_STIG_OPCODE_RESET_EN		0x66
+#define CAD_QSPI_STIG_OPCODE_RESET_MEM		0x99
+#define CAD_QSPI_STIG_RDID_CAPACITYID(x)	(((x) >> 16) & 0xff)
+#define CAD_QSPI_STIG_SR_BUSY(x)		(((x) >> 0) & 1)
+
+
+#define CAD_QSPI_INST_SINGLE			0
+#define CAD_QSPI_INST_DUAL			1
+#define CAD_QSPI_INST_QUAD			2
+
+#define CAD_QSPI_INDRDSTADDR			0x68
+#define CAD_QSPI_INDRDCNT			0x6c
+#define CAD_QSPI_INDRD				0x60
+#define CAD_QSPI_INDRD_RD_STAT(x)		(((x) >> 2) & 1)
+#define CAD_QSPI_INDRD_START			1
+#define CAD_QSPI_INDRD_IND_OPS_DONE		0x20
+
+#define CAD_QSPI_INDWR				0x70
+#define CAD_QSPI_INDWR_RDSTAT(x)		(((x) >> 2) & 1)
+#define CAD_QSPI_INDWRSTADDR			0x78
+#define CAD_QSPI_INDWRCNT			0x7c
+#define CAD_QSPI_INDWR				0x70
+#define CAD_QSPI_INDWR_START			0x1
+#define CAD_QSPI_INDWR_INDDONE			0x20
+
+#define CAD_QSPI_INT_STATUS_ALL			0x0000ffff
+
+#define CAD_QSPI_N25Q_DIE_SIZE			0x02000000
+#define CAD_QSPI_BANK_SIZE			0x01000000
+#define CAD_QSPI_PAGE_SIZE			0x00000100
+
+#define CAD_QSPI_IRQMSK				0x44
+
+#define CAD_QSPI_SUBSECTOR_SIZE			0x1000
+
+#define S10_QSPI_ADDR_BYTES			2
+#define S10_QSPI_BYTES_PER_DEV			256
+#define S10_BYTES_PER_BLOCK			16
+
+#define QSPI_FAST_READ				0xb
+
+// QSPI CONFIGURATIONS
+
+#define QSPI_CONFIG_CPOL			1
+#define QSPI_CONFIG_CPHA			1
+
+#define QSPI_CONFIG_CSSOT			0x14
+#define QSPI_CONFIG_CSEOT			0x14
+#define QSPI_CONFIG_CSDADS			0xff
+#define QSPI_CONFIG_CSDA			0xc8
+
+int cad_qspi_init(uint32_t desired_clk_freq, uint32_t clk_phase,
+	uint32_t clk_pol, uint32_t csda, uint32_t csdads,
+	uint32_t cseot, uint32_t cssot, uint32_t rddatacap);
+void cad_qspi_set_chip_select(int cs);
+int cad_qspi_erase(uint32_t offset, uint32_t size);
+int cad_qspi_write(void *buffer, uint32_t offset, uint32_t size);
+int cad_qspi_read(void *buffer, uint32_t offset, uint32_t size);
+int cad_qspi_update(void *buffer, uint32_t offset, uint32_t size);
+
+#endif
+