[U-Boot] [PATCH] spi/cadence: Adding Cadence SPI driver support for SOCFPGA
Chin Liang See
clsee at altera.com
Wed Dec 18 21:05:55 CET 2013
To add the Cadence SPI driver support for Altera SOCFPGA. It
required information such as clocks and timing from platform's
configuration header file within include/configs folder
Signed-off-by: Chin Liang See <clsee at altera.com>
Cc: Jagannadha Sutradharudu Teki <jaganna at xilinx.com>
---
drivers/spi/Makefile | 1 +
drivers/spi/cadence_qspi.c | 337 ++++++++++++++++
drivers/spi/cadence_qspi.h | 56 +++
drivers/spi/cadence_qspi_apb.c | 873 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 1267 insertions(+)
create mode 100644 drivers/spi/cadence_qspi.c
create mode 100644 drivers/spi/cadence_qspi.h
create mode 100644 drivers/spi/cadence_qspi_apb.c
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index ed4ecd7..838e6ca 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_ATMEL_DATAFLASH_SPI) += atmel_dataflash_spi.o
obj-$(CONFIG_ATMEL_SPI) += atmel_spi.o
obj-$(CONFIG_BFIN_SPI) += bfin_spi.o
obj-$(CONFIG_BFIN_SPI6XX) += bfin_spi6xx.o
+obj-$(CONFIG_CADENCE_QSPI) += cadence_qspi.o cadence_qspi_apb.o
obj-$(CONFIG_CF_SPI) += cf_spi.o
obj-$(CONFIG_CF_QSPI) += cf_qspi.o
obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
new file mode 100644
index 0000000..e2bf39f
--- /dev/null
+++ b/drivers/spi/cadence_qspi.c
@@ -0,0 +1,337 @@
+/*
+ * Copyright (C) Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include "cadence_qspi.h"
+
+#define CQSPI_STIG_READ 0
+#define CQSPI_STIG_WRITE 1
+#define CQSPI_INDIRECT_READ 2
+#define CQSPI_INDIRECT_WRITE 3
+
+static int qspi_is_init;
+static unsigned int qspi_calibrated_hz;
+static unsigned int qspi_calibrated_cs;
+
+struct cadence_qspi_slave {
+ struct spi_slave slave;
+ unsigned int mode;
+ unsigned int max_hz;
+ void *regbase;
+ void *ahbbase;
+ size_t cmd_len;
+ u8 cmd_buf[32];
+ size_t data_len;
+};
+
+#define to_cadence_qspi_slave(s) \
+ container_of(s, struct cadence_qspi_slave, slave)
+
+void spi_set_speed(struct spi_slave *slave, uint hz)
+{
+ struct cadence_qspi_slave *cadence_qspi = to_cadence_qspi_slave(slave);
+ void *base = cadence_qspi->regbase;
+
+ cadence_qspi_apb_config_baudrate_div(base, CONFIG_CQSPI_REF_CLK, hz);
+
+ /* Reconfigure delay timing if speed is changed. */
+ cadence_qspi_apb_delay(base, CONFIG_CQSPI_REF_CLK, hz,
+ CONFIG_CQSPI_TSHSL_NS, CONFIG_CQSPI_TSD2D_NS,
+ CONFIG_CQSPI_TCHSH_NS, CONFIG_CQSPI_TSLCH_NS);
+ return;
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct cadence_qspi_slave *cadence_qspi;
+
+ debug("%s: bus %d cs %d max_hz %dMHz mode %d\n", __func__,
+ bus, cs, max_hz/1000000, mode);
+
+ if (!spi_cs_is_valid(bus, cs))
+ return NULL;
+
+ cadence_qspi = malloc(sizeof(struct cadence_qspi_slave));
+ if (!cadence_qspi) {
+ printf("QSPI: Can't allocate struct cadence_qspi_slave. "
+ "Bus %d cs %d\n", bus, cs);
+ return NULL;
+ }
+
+ cadence_qspi->slave.bus = bus;
+ cadence_qspi->slave.cs = cs;
+ cadence_qspi->mode = mode;
+ cadence_qspi->max_hz = max_hz;
+ cadence_qspi->regbase = (void *)QSPI_BASE;
+ cadence_qspi->ahbbase = (void *)QSPI_AHB_BASE;
+
+ if (!qspi_is_init)
+ spi_init();
+
+ return &cadence_qspi->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ struct cadence_qspi_slave *cadence_qspi = to_cadence_qspi_slave(slave);
+ free(cadence_qspi);
+ return;
+}
+
+void spi_init(void)
+{
+ cadence_qspi_apb_controller_init((void *)QSPI_BASE);
+ qspi_is_init = 1;
+ return;
+}
+
+/* calibration sequence to determine the read data capture delay register */
+int spi_calibration(struct spi_slave *slave)
+{
+ struct cadence_qspi_slave *cadence_qspi = to_cadence_qspi_slave(slave);
+ void *base = cadence_qspi->regbase;
+ u8 opcode_rdid = 0x9F;
+ unsigned int idcode = 0, temp = 0;
+ int err = 0, i, range_lo = -1, range_hi = -1;
+
+ /* start with slowest clock (1 MHz) */
+ spi_set_speed(slave, 1000000);
+
+ /* configure the read data capture delay register to 0 */
+ cadence_qspi_apb_readdata_capture(base, 1, 0);
+
+ /* Enable QSPI */
+ cadence_qspi_apb_controller_enable(base);
+
+ /* read the ID which will be our golden value */
+ err = cadence_qspi_apb_command_read(base, 1, &opcode_rdid,
+ 3, (u8 *)&idcode);
+ if (err) {
+ puts("SF: Calibration failed (read)\n");
+ return err;
+ }
+
+ /* use back the intended clock and find low range */
+ spi_set_speed(slave, cadence_qspi->max_hz);
+ for (i = 0; i < CQSPI_READ_CAPTURE_MAX_DELAY; i++) {
+ /* Disable QSPI */
+ cadence_qspi_apb_controller_disable(base);
+
+ /* reconfigure the read data capture delay register */
+ cadence_qspi_apb_readdata_capture(base, 1, i);
+
+ /* Enable back QSPI */
+ cadence_qspi_apb_controller_enable(base);
+
+ /* issue a RDID to get the ID value */
+ err = cadence_qspi_apb_command_read(base, 1, &opcode_rdid,
+ 3, (u8 *)&temp);
+ if (err) {
+ puts("SF: Calibration failed (read)\n");
+ return err;
+ }
+
+ /* search for range lo */
+ if (range_lo == -1 && temp == idcode) {
+ range_lo = i;
+ continue;
+ }
+
+ /* search for range hi */
+ if (range_lo != -1 && temp != idcode) {
+ range_hi = i - 1;
+ break;
+ }
+ range_hi = i;
+ }
+
+ if (range_lo == -1) {
+ puts("SF: Calibration failed (low range)\n");
+ return err;
+ }
+
+ /* Disable QSPI for subsequent initialization */
+ cadence_qspi_apb_controller_disable(base);
+
+ /* configure the final value for read data capture delay register */
+ cadence_qspi_apb_readdata_capture(base, 1, (range_hi + range_lo) / 2);
+ printf("SF: Read data capture delay calibrated to %i (%i - %i)\n",
+ (range_hi + range_lo) / 2, range_lo, range_hi);
+
+ /* just to ensure we do once only when speed or chip select change */
+ qspi_calibrated_hz = cadence_qspi->max_hz;
+ qspi_calibrated_cs = slave->cs;
+ return 0;
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ struct cadence_qspi_slave *cadence_qspi = to_cadence_qspi_slave(slave);
+ unsigned int clk_pol = (cadence_qspi->mode & SPI_CPOL) ? 1 : 0;
+ unsigned int clk_pha = (cadence_qspi->mode & SPI_CPHA) ? 1 : 0;
+ void *base = cadence_qspi->regbase;
+ int err = 0;
+
+ debug("%s: bus:%i cs:%i\n", __func__, slave->bus, slave->cs);
+
+ /* Disable QSPI */
+ cadence_qspi_apb_controller_disable(base);
+
+ /* Set Chip select */
+ cadence_qspi_apb_chipselect(base, slave->cs, CONFIG_CQSPI_DECODER);
+
+ /* Set SPI mode */
+ cadence_qspi_apb_set_clk_mode(base, clk_pol, clk_pha);
+
+ /* Set clock speed */
+ spi_set_speed(slave, cadence_qspi->max_hz);
+
+ /* calibration required for different SCLK speed or chip select */
+ if (qspi_calibrated_hz != cadence_qspi->max_hz ||
+ qspi_calibrated_cs != slave->cs) {
+ err = spi_calibration(slave);
+ if (err)
+ return err;
+ }
+
+ /* Enable QSPI */
+ cadence_qspi_apb_controller_enable(base);
+
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+ return;
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *data_out,
+ void *data_in, unsigned long flags)
+{
+ struct cadence_qspi_slave *cadence_qspi = to_cadence_qspi_slave(slave);
+ void *base = cadence_qspi->regbase;
+ void *ahbbase = cadence_qspi->ahbbase;
+ u8 *cmd_buf = cadence_qspi->cmd_buf;
+ size_t data_bytes;
+ int err = 0;
+ u32 mode = CQSPI_STIG_WRITE;
+
+ if (flags & SPI_XFER_BEGIN) {
+ /* copy command to local buffer */
+ cadence_qspi->cmd_len = bitlen / 8;
+ memcpy(cmd_buf, data_out, cadence_qspi->cmd_len);
+ }
+
+ if (flags == (SPI_XFER_BEGIN | SPI_XFER_END)) {
+ /* if start and end bit are set, the data bytes is 0. */
+ data_bytes = 0;
+ } else {
+ data_bytes = bitlen / 8;
+ }
+
+ if ((flags & SPI_XFER_END) || (flags == 0)) {
+ if (cadence_qspi->cmd_len == 0) {
+ printf("QSPI: Error, command is empty.\n");
+ return -1;
+ }
+
+ if (data_in && data_bytes) {
+ /* read */
+ /* Use STIG if no address. */
+ if (!CQSPI_IS_ADDR(cadence_qspi->cmd_len))
+ mode = CQSPI_STIG_READ;
+ else
+ mode = CQSPI_INDIRECT_READ;
+ } else if (data_out && !(flags & SPI_XFER_BEGIN)) {
+ /* write */
+ if (!CQSPI_IS_ADDR(cadence_qspi->cmd_len))
+ mode = CQSPI_STIG_WRITE;
+ else
+ mode = CQSPI_INDIRECT_WRITE;
+ }
+
+ switch (mode) {
+ case CQSPI_STIG_READ:
+ err = cadence_qspi_apb_command_read(
+ base, cadence_qspi->cmd_len, cmd_buf,
+ data_bytes, data_in);
+
+ break;
+ case CQSPI_STIG_WRITE:
+ err = cadence_qspi_apb_command_write(base,
+ cadence_qspi->cmd_len, cmd_buf,
+ data_bytes, data_out);
+ break;
+ case CQSPI_INDIRECT_READ:
+ err = cadence_qspi_apb_indirect_read_setup(
+ base, QSPI_AHB_BASE,
+ cadence_qspi->cmd_len, cmd_buf);
+ if (!err) {
+ err = cadence_qspi_apb_indirect_read_execute
+ (base, ahbbase, data_bytes, data_in);
+ }
+ break;
+ case CQSPI_INDIRECT_WRITE:
+ err = cadence_qspi_apb_indirect_write_setup
+ (base, QSPI_AHB_BASE,
+ cadence_qspi->cmd_len, cmd_buf);
+ if (!err) {
+ err = cadence_qspi_apb_indirect_write_execute
+ (base, ahbbase, data_bytes, data_out);
+ }
+ break;
+ default:
+ err = -1;
+ break;
+ }
+
+ if (flags & SPI_XFER_END) {
+ /* clear command buffer */
+ memset(cmd_buf, 0, sizeof(cadence_qspi->cmd_buf));
+ cadence_qspi->cmd_len = 0;
+ }
+ }
+ return err;
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+#if (CONFIG_CQSPI_DECODER == 1)
+ if (((cs >= 0) && (cs < CQSPI_DECODER_MAX_CS)) && ((bus >= 0) &&
+ (bus < CQSPI_DECODER_MAX_CS))) {
+ return 1;
+ }
+#else
+ if (((cs >= 0) && (cs < CQSPI_NO_DECODER_MAX_CS)) &&
+ ((bus >= 0) && (bus < CQSPI_NO_DECODER_MAX_CS))) {
+ return 1;
+ }
+#endif
+ printf("QSPI: Invalid bus or cs. Bus %d cs %d\n", bus, cs);
+ return 0;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+ return;
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+ return;
+}
+
+void spi_enter_xip(struct spi_slave *slave, char xip_dummy)
+{
+ struct cadence_qspi_slave *cadence_qspi = to_cadence_qspi_slave(slave);
+ void *base = cadence_qspi->regbase;
+ /* Enter XiP */
+ cadence_qspi_apb_enter_xip(base, xip_dummy);
+ return;
+}
diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
new file mode 100644
index 0000000..5e63bc4
--- /dev/null
+++ b/drivers/spi/cadence_qspi.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __CADENCE_QSPI_H__
+#define __CADENCE_QSPI_H__
+
+#define CQSPI_WRITEL writel
+#define CQSPI_READL readl
+
+#define QSPI_BASE (CONFIG_CQSPI_BASE)
+#define QSPI_AHB_BASE (CONFIG_CQSPI_AHB_BASE)
+#define CQSPI_IS_ADDR(cmd_len) (cmd_len > 1 ? 1 : 0)
+
+#define CQSPI_NO_DECODER_MAX_CS (4)
+#define CQSPI_DECODER_MAX_CS (16)
+#define CQSPI_READ_CAPTURE_MAX_DELAY (16)
+
+/* Functions call declaration */
+void cadence_qspi_apb_controller_init(void *reg_base_addr);
+void cadence_qspi_apb_controller_enable(void *reg_base_addr);
+void cadence_qspi_apb_controller_disable(void *reg_base_addr);
+
+int cadence_qspi_apb_command_read(void *reg_base_addr,
+ unsigned int cmdlen, const u8 *cmdbuf, unsigned int rxlen, u8 *rxbuf);
+int cadence_qspi_apb_command_write(void *reg_base_addr,
+ unsigned int cmdlen, const u8 *cmdbuf,
+ unsigned int txlen, const u8 *txbuf);
+
+int cadence_qspi_apb_indirect_read_setup(void *reg_base,
+ unsigned int ahb_phy_addr, unsigned int cmdlen, const u8 *cmdbuf);
+int cadence_qspi_apb_indirect_read_execute(void *reg_base_addr,
+ void *ahb_base_addr, unsigned int rxlen, u8 *rxbuf);
+
+int cadence_qspi_apb_indirect_write_setup(void *reg_base,
+ unsigned int ahb_phy_addr, unsigned int cmdlen, const u8 *cmdbuf);
+int cadence_qspi_apb_indirect_write_execute(void *reg_base_addr,
+ void *ahb_base_addr, unsigned int txlen, const u8 *txbuf);
+
+void cadence_qspi_apb_chipselect(void *reg_base,
+ unsigned int chip_select, unsigned int decoder_enable);
+void cadence_qspi_apb_set_clk_mode(void *reg_base_addr,
+ unsigned int clk_pol, unsigned int clk_pha);
+void cadence_qspi_apb_config_baudrate_div(void *reg_base,
+ unsigned int ref_clk_hz, unsigned int sclk_hz);
+void cadence_qspi_apb_delay(void *reg_base,
+ unsigned int ref_clk, unsigned int sclk_hz,
+ unsigned int tshsl_ns, unsigned int tsd2d_ns,
+ unsigned int tchsh_ns, unsigned int tslch_ns);
+void cadence_qspi_apb_enter_xip(void *reg_base, char xip_dummy);
+void cadence_qspi_apb_readdata_capture(void *reg_base,
+ unsigned int bypass, unsigned int delay);
+
+#endif /* __CADENCE_QSPI_H__ */
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
new file mode 100644
index 0000000..7798acb
--- /dev/null
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -0,0 +1,873 @@
+/*
+ * Copyright (C) Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include "cadence_qspi.h"
+
+#define CQSPI_REG_POLL_US (1)
+#define CQSPI_REG_RETRY (10000)
+#define CQSPI_POLL_IDLE_RETRY (3)
+
+#define CQSPI_FIFO_WIDTH (4)
+
+/* Controller sram size in word */
+#define CQSPI_REG_SRAM_SIZE_WORD (128)
+#define CQSPI_REG_SRAM_RESV_WORDS (2)
+#define CQSPI_REG_SRAM_PARTITION_WR (1)
+#define CQSPI_REG_SRAM_PARTITION_RD \
+ (CQSPI_REG_SRAM_SIZE_WORD - CQSPI_REG_SRAM_RESV_WORDS)
+#define CQSPI_REG_SRAM_THRESHOLD_WORDS (50)
+
+/* Transfer mode */
+#define CQSPI_INST_TYPE_SINGLE (0)
+#define CQSPI_INST_TYPE_DUAL (1)
+#define CQSPI_INST_TYPE_QUAD (2)
+
+#define CQSPI_STIG_DATA_LEN_MAX (8)
+#define CQSPI_INDIRECTTRIGGER_ADDR_MASK (0xFFFFF)
+
+#define CQSPI_DUMMY_CLKS_PER_BYTE (8)
+#define CQSPI_DUMMY_BYTES_MAX (4)
+
+
+#define CQSPI_REG_SRAM_FILL_THRESHOLD \
+ ((CQSPI_REG_SRAM_SIZE_WORD / 2) * CQSPI_FIFO_WIDTH)
+/****************************************************************************
+ * Controller's configuration and status register (offset from QSPI_BASE)
+ ****************************************************************************/
+#define CQSPI_REG_CONFIG 0x00
+#define CQSPI_REG_CONFIG_CLK_POL_LSB 1
+#define CQSPI_REG_CONFIG_CLK_PHA_LSB 2
+#define CQSPI_REG_CONFIG_ENABLE_MASK (1 << 0)
+#define CQSPI_REG_CONFIG_DIRECT_MASK (1 << 7)
+#define CQSPI_REG_CONFIG_DECODE_MASK (1 << 9)
+#define CQSPI_REG_CONFIG_XIP_IMM_MASK (1 << 18)
+#define CQSPI_REG_CONFIG_CHIPSELECT_LSB 10
+#define CQSPI_REG_CONFIG_BAUD_LSB 19
+#define CQSPI_REG_CONFIG_IDLE_LSB 31
+#define CQSPI_REG_CONFIG_CHIPSELECT_MASK 0xF
+#define CQSPI_REG_CONFIG_BAUD_MASK 0xF
+
+#define CQSPI_REG_RD_INSTR 0x04
+#define CQSPI_REG_RD_INSTR_OPCODE_LSB 0
+#define CQSPI_REG_RD_INSTR_TYPE_INSTR_LSB 8
+#define CQSPI_REG_RD_INSTR_TYPE_ADDR_LSB 12
+#define CQSPI_REG_RD_INSTR_TYPE_DATA_LSB 16
+#define CQSPI_REG_RD_INSTR_MODE_EN_LSB 20
+#define CQSPI_REG_RD_INSTR_DUMMY_LSB 24
+#define CQSPI_REG_RD_INSTR_TYPE_INSTR_MASK 0x3
+#define CQSPI_REG_RD_INSTR_TYPE_ADDR_MASK 0x3
+#define CQSPI_REG_RD_INSTR_TYPE_DATA_MASK 0x3
+#define CQSPI_REG_RD_INSTR_DUMMY_MASK 0x1F
+
+#define CQSPI_REG_WR_INSTR 0x08
+#define CQSPI_REG_WR_INSTR_OPCODE_LSB 0
+
+#define CQSPI_REG_DELAY 0x0C
+#define CQSPI_REG_DELAY_TSLCH_LSB 0
+#define CQSPI_REG_DELAY_TCHSH_LSB 8
+#define CQSPI_REG_DELAY_TSD2D_LSB 16
+#define CQSPI_REG_DELAY_TSHSL_LSB 24
+#define CQSPI_REG_DELAY_TSLCH_MASK 0xFF
+#define CQSPI_REG_DELAY_TCHSH_MASK 0xFF
+#define CQSPI_REG_DELAY_TSD2D_MASK 0xFF
+#define CQSPI_REG_DELAY_TSHSL_MASK 0xFF
+
+#define CQSPI_READLCAPTURE 0x10
+#define CQSPI_READLCAPTURE_BYPASS_LSB 0
+#define CQSPI_READLCAPTURE_DELAY_LSB 1
+#define CQSPI_READLCAPTURE_DELAY_MASK 0xF
+
+#define CQSPI_REG_SIZE 0x14
+#define CQSPI_REG_SIZE_ADDRESS_LSB 0
+#define CQSPI_REG_SIZE_PAGE_LSB 4
+#define CQSPI_REG_SIZE_BLOCK_LSB 16
+#define CQSPI_REG_SIZE_ADDRESS_MASK 0xF
+#define CQSPI_REG_SIZE_PAGE_MASK 0xFFF
+#define CQSPI_REG_SIZE_BLOCK_MASK 0x3F
+
+#define CQSPI_REG_SRAMPARTITION 0x18
+#define CQSPI_REG_INDIRECTTRIGGER 0x1C
+
+#define CQSPI_REG_REMAP 0x24
+#define CQSPI_REG_MODE_BIT 0x28
+
+#define CQSPI_REG_SDRAMLEVEL 0x2C
+#define CQSPI_REG_SDRAMLEVEL_RD_LSB 0
+#define CQSPI_REG_SDRAMLEVEL_WR_LSB 16
+#define CQSPI_REG_SDRAMLEVEL_RD_MASK 0xFFFF
+#define CQSPI_REG_SDRAMLEVEL_WR_MASK 0xFFFF
+
+#define CQSPI_REG_IRQSTATUS 0x40
+#define CQSPI_REG_IRQMASK 0x44
+
+#define CQSPI_REG_INDIRECTRD 0x60
+#define CQSPI_REG_INDIRECTRD_START_MASK (1 << 0)
+#define CQSPI_REG_INDIRECTRD_CANCEL_MASK (1 << 1)
+#define CQSPI_REG_INDIRECTRD_INPROGRESS_MASK (1 << 2)
+#define CQSPI_REG_INDIRECTRD_DONE_MASK (1 << 5)
+
+#define CQSPI_REG_INDIRECTRDWATERMARK 0x64
+#define CQSPI_REG_INDIRECTRDSTARTADDR 0x68
+#define CQSPI_REG_INDIRECTRDBYTES 0x6C
+
+#define CQSPI_REG_CMDCTRL 0x90
+#define CQSPI_REG_CMDCTRL_EXECUTE_MASK (1 << 0)
+#define CQSPI_REG_CMDCTRL_INPROGRESS_MASK (1 << 1)
+#define CQSPI_REG_CMDCTRL_DUMMY_LSB 7
+#define CQSPI_REG_CMDCTRL_WR_BYTES_LSB 12
+#define CQSPI_REG_CMDCTRL_WR_EN_LSB 15
+#define CQSPI_REG_CMDCTRL_ADD_BYTES_LSB 16
+#define CQSPI_REG_CMDCTRL_ADDR_EN_LSB 19
+#define CQSPI_REG_CMDCTRL_RD_BYTES_LSB 20
+#define CQSPI_REG_CMDCTRL_RD_EN_LSB 23
+#define CQSPI_REG_CMDCTRL_OPCODE_LSB 24
+#define CQSPI_REG_CMDCTRL_DUMMY_MASK 0x1F
+#define CQSPI_REG_CMDCTRL_WR_BYTES_MASK 0x7
+#define CQSPI_REG_CMDCTRL_ADD_BYTES_MASK 0x3
+#define CQSPI_REG_CMDCTRL_RD_BYTES_MASK 0x7
+#define CQSPI_REG_CMDCTRL_OPCODE_MASK 0xFF
+
+#define CQSPI_REG_INDIRECTWR 0x70
+#define CQSPI_REG_INDIRECTWR_START_MASK (1 << 0)
+#define CQSPI_REG_INDIRECTWR_CANCEL_MASK (1 << 1)
+#define CQSPI_REG_INDIRECTWR_INPROGRESS_MASK (1 << 2)
+#define CQSPI_REG_INDIRECTWR_DONE_MASK (1 << 5)
+
+#define CQSPI_REG_INDIRECTWRWATERMARK 0x74
+#define CQSPI_REG_INDIRECTWRSTARTADDR 0x78
+#define CQSPI_REG_INDIRECTWRBYTES 0x7C
+
+#define CQSPI_REG_CMDADDRESS 0x94
+#define CQSPI_REG_CMDREADDATALOWER 0xA0
+#define CQSPI_REG_CMDREADDATAUPPER 0xA4
+#define CQSPI_REG_CMDWRITEDATALOWER 0xA8
+#define CQSPI_REG_CMDWRITEDATAUPPER 0xAC
+
+#define CQSPI_REG_IS_IDLE(base) \
+ ((CQSPI_READL(base + CQSPI_REG_CONFIG) >> \
+ CQSPI_REG_CONFIG_IDLE_LSB) & 0x1)
+
+#define CQSPI_CAL_DELAY(tdelay_ns, tref_ns, tsclk_ns) \
+ ((((tdelay_ns) - (tsclk_ns)) / (tref_ns)))
+
+#define CQSPI_GET_RD_SRAM_LEVEL(reg_basse) \
+ (((CQSPI_READL(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \
+ CQSPI_REG_SDRAMLEVEL_RD_LSB) & CQSPI_REG_SDRAMLEVEL_RD_MASK)
+
+#define CQSPI_GET_WR_SRAM_LEVEL(reg_basse) \
+ (((CQSPI_READL(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \
+ CQSPI_REG_SDRAMLEVEL_WR_LSB) & CQSPI_REG_SDRAMLEVEL_WR_MASK)
+
+static unsigned int cadence_qspi_apb_cmd2addr(const unsigned char *addr_buf,
+ unsigned int addr_width)
+{
+ unsigned int addr;
+
+ addr = (addr_buf[0] << 16) | (addr_buf[1] << 8) | addr_buf[2];
+
+ if (addr_width == 4)
+ addr = (addr << 8) | addr_buf[3];
+
+ return addr;
+}
+
+static void cadence_qspi_apb_read_fifo_data(void *dest,
+ const void *src_ahb_addr, unsigned int bytes)
+{
+ unsigned int temp;
+ int remaining = bytes;
+ unsigned int *dest_ptr = (unsigned int *)dest;
+ unsigned int *src_ptr = (unsigned int *)src_ahb_addr;
+
+ while (remaining > 0) {
+ if (remaining >= CQSPI_FIFO_WIDTH) {
+ *dest_ptr = CQSPI_READL(src_ptr);
+ remaining -= CQSPI_FIFO_WIDTH;
+ } else {
+ /* dangling bytes */
+ temp = CQSPI_READL(src_ptr);
+ memcpy(dest_ptr, &temp, remaining);
+ break;
+ }
+ dest_ptr++;
+ }
+
+ return;
+}
+
+static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
+ const void *src, unsigned int bytes)
+{
+ unsigned int temp;
+ int remaining = bytes;
+ unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr;
+ unsigned int *src_ptr = (unsigned int *)src;
+
+ while (remaining > 0) {
+ if (remaining >= CQSPI_FIFO_WIDTH) {
+ CQSPI_WRITEL(*src_ptr, dest_ptr);
+ remaining -= sizeof(unsigned int);
+ } else {
+ /* dangling bytes */
+ memcpy(&temp, src_ptr, remaining);
+ CQSPI_WRITEL(temp, dest_ptr);
+ break;
+ }
+ src_ptr++;
+ }
+
+ return;
+}
+
+/* Read from SRAM FIFO with polling SRAM fill level. */
+static int qspi_read_sram_fifo_poll(const void *reg_base, void *dest_addr,
+ const void *src_addr, unsigned int num_bytes)
+{
+ unsigned int remaining = num_bytes;
+ unsigned int retry;
+ unsigned int sram_level = 0;
+ unsigned char *dest = (unsigned char *)dest_addr;
+
+ while (remaining > 0) {
+ retry = CQSPI_REG_RETRY;
+ while (retry--) {
+ sram_level = CQSPI_GET_RD_SRAM_LEVEL(reg_base);
+ if (sram_level)
+ break;
+ udelay(1);
+ }
+
+ if (!retry) {
+ printf("QSPI: No receive data after polling for %d "
+ "times\n", CQSPI_REG_RETRY);
+ return -1;
+ }
+
+ sram_level *= CQSPI_FIFO_WIDTH;
+ sram_level = sram_level > remaining ? remaining : sram_level;
+
+ /* Read data from FIFO. */
+ cadence_qspi_apb_read_fifo_data(dest, src_addr, sram_level);
+ dest += sram_level;
+ remaining -= sram_level;
+ udelay(1);
+ }
+ return 0;
+}
+
+
+/* Write to SRAM FIFO with polling SRAM fill level. */
+static int qpsi_write_sram_fifo_push(const void *reg_base, void *dest_addr,
+ const void *src_addr, unsigned int num_bytes)
+{
+ unsigned int retry = CQSPI_REG_RETRY;
+ unsigned int sram_level;
+ unsigned int wr_bytes;
+ unsigned char *src = (unsigned char *)src_addr;
+ int remaining = num_bytes;
+ unsigned int page_size = CONFIG_CQSPI_PAGE_SIZE;
+ unsigned int sram_threshold_words = CQSPI_REG_SRAM_THRESHOLD_WORDS;
+
+ while (remaining > 0) {
+ retry = CQSPI_REG_RETRY;
+ while (retry--) {
+ sram_level = CQSPI_GET_WR_SRAM_LEVEL(reg_base);
+ if (sram_level <= sram_threshold_words)
+ break;
+ }
+ if (!retry) {
+ printf("QSPI: SRAM fill level (0x%08x) "
+ "not hit lower expected level (0x%08x)",
+ sram_level, sram_threshold_words);
+ return -1;
+ }
+ /* Write a page or remaining bytes. */
+ wr_bytes = (remaining > page_size) ?
+ page_size : remaining;
+
+ cadence_qspi_apb_write_fifo_data(dest_addr, src, wr_bytes);
+ src += wr_bytes;
+ remaining -= wr_bytes;
+ }
+
+ return 0;
+}
+
+void cadence_qspi_apb_controller_enable(void *reg_base)
+{
+ unsigned int reg;
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CONFIG);
+ reg |= CQSPI_REG_CONFIG_ENABLE_MASK;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CONFIG);
+ return;
+}
+
+void cadence_qspi_apb_controller_disable(void *reg_base)
+{
+ unsigned int reg;
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~CQSPI_REG_CONFIG_ENABLE_MASK;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CONFIG);
+ return;
+}
+
+/* Return 1 if idle, otherwise return 0 (busy). */
+static unsigned int cadence_qspi_wait_idle(void *reg_base)
+{
+ unsigned int start, count = 0;
+ /* timeout in unit of ms */
+ unsigned int timeout = 5000;
+
+ start = get_timer(0);
+ for ( ; get_timer(start) < timeout ; ) {
+ if (CQSPI_REG_IS_IDLE(reg_base))
+ count++;
+ else
+ count = 0;
+ /*
+ * Ensure the QSPI controller is in true idle state after
+ * reading back the same idle status consecutively
+ */
+ if (count >= CQSPI_POLL_IDLE_RETRY)
+ return 1;
+ }
+
+ /* Timeout, still in busy mode. */
+ printf("QSPI: QSPI is still busy after poll for %d times.\n",
+ CQSPI_REG_RETRY);
+ return 0;
+}
+
+void cadence_qspi_apb_readdata_capture(void *reg_base,
+ unsigned int bypass, unsigned int delay)
+{
+ unsigned int reg;
+ cadence_qspi_apb_controller_disable(reg_base);
+
+ reg = CQSPI_READL(reg_base + CQSPI_READLCAPTURE);
+
+ if (bypass)
+ reg |= (1 << CQSPI_READLCAPTURE_BYPASS_LSB);
+ else
+ reg &= ~(1 << CQSPI_READLCAPTURE_BYPASS_LSB);
+
+ reg &= ~(CQSPI_READLCAPTURE_DELAY_MASK
+ << CQSPI_READLCAPTURE_DELAY_LSB);
+
+ reg |= ((delay & CQSPI_READLCAPTURE_DELAY_MASK)
+ << CQSPI_READLCAPTURE_DELAY_LSB);
+
+ CQSPI_WRITEL(reg, reg_base + CQSPI_READLCAPTURE);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+void cadence_qspi_apb_config_baudrate_div(void *reg_base,
+ unsigned int ref_clk_hz, unsigned int sclk_hz)
+{
+ unsigned int reg;
+ unsigned int div;
+
+ cadence_qspi_apb_controller_disable(reg_base);
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~(CQSPI_REG_CONFIG_BAUD_MASK << CQSPI_REG_CONFIG_BAUD_LSB);
+
+ div = ref_clk_hz / sclk_hz;
+
+ if (div > 32)
+ div = 32;
+
+ /* Check if even number. */
+ if ((div & 1))
+ div = (div / 2);
+ else
+ div = (div / 2) - 1;
+
+ debug("%s: ref_clk %dHz sclk %dHz Div 0x%x\n", __func__,
+ ref_clk_hz, sclk_hz, div);
+
+ div = (div & CQSPI_REG_CONFIG_BAUD_MASK) << CQSPI_REG_CONFIG_BAUD_LSB;
+ reg |= div;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CONFIG);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+void cadence_qspi_apb_set_clk_mode(void *reg_base,
+ unsigned int clk_pol, unsigned int clk_pha)
+{
+ unsigned int reg;
+
+ cadence_qspi_apb_controller_disable(reg_base);
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~(1 <<
+ (CQSPI_REG_CONFIG_CLK_POL_LSB | CQSPI_REG_CONFIG_CLK_PHA_LSB));
+
+ reg |= ((clk_pol & 0x1) << CQSPI_REG_CONFIG_CLK_POL_LSB);
+ reg |= ((clk_pha & 0x1) << CQSPI_REG_CONFIG_CLK_PHA_LSB);
+
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CONFIG);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+void cadence_qspi_apb_chipselect(void *reg_base,
+ unsigned int chip_select, unsigned int decoder_enable)
+{
+ unsigned int reg;
+
+ cadence_qspi_apb_controller_disable(reg_base);
+
+ debug("%s : chipselect %d decode %d\n", __func__, chip_select,
+ decoder_enable);
+
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CONFIG);
+ /* docoder */
+ if (decoder_enable)
+ reg |= CQSPI_REG_CONFIG_DECODE_MASK;
+ else {
+ reg &= ~CQSPI_REG_CONFIG_DECODE_MASK;
+ /* Convert CS if without decoder.
+ * CS0 to 4b'1110
+ * CS1 to 4b'1101
+ * CS2 to 4b'1011
+ * CS3 to 4b'0111
+ */
+ chip_select = 0xF & ~(1 << chip_select);
+ }
+
+ reg &= ~(CQSPI_REG_CONFIG_CHIPSELECT_MASK
+ << CQSPI_REG_CONFIG_CHIPSELECT_LSB);
+ reg |= (chip_select & CQSPI_REG_CONFIG_CHIPSELECT_MASK)
+ << CQSPI_REG_CONFIG_CHIPSELECT_LSB;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CONFIG);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+void cadence_qspi_apb_delay(void *reg_base,
+ unsigned int ref_clk, unsigned int sclk_hz,
+ unsigned int tshsl_ns, unsigned int tsd2d_ns,
+ unsigned int tchsh_ns, unsigned int tslch_ns)
+{
+ unsigned int ref_clk_ns;
+ unsigned int sclk_ns;
+ unsigned int tshsl, tchsh, tslch, tsd2d;
+ unsigned int reg;
+
+ cadence_qspi_apb_controller_disable(reg_base);
+
+ /* Convert to ns. */
+ ref_clk_ns = (1000000000) / ref_clk;
+
+ /* Convert to ns. */
+ sclk_ns = (1000000000) / sclk_hz;
+
+ /* Plus 1 to round up 1 clock cycle. */
+ tshsl = CQSPI_CAL_DELAY(tshsl_ns, ref_clk_ns, sclk_ns) + 1;
+ tchsh = CQSPI_CAL_DELAY(tchsh_ns, ref_clk_ns, sclk_ns) + 1;
+ tslch = CQSPI_CAL_DELAY(tslch_ns, ref_clk_ns, sclk_ns) + 1;
+ tsd2d = CQSPI_CAL_DELAY(tsd2d_ns, ref_clk_ns, sclk_ns) + 1;
+
+ reg = ((tshsl & CQSPI_REG_DELAY_TSHSL_MASK)
+ << CQSPI_REG_DELAY_TSHSL_LSB);
+ reg |= ((tchsh & CQSPI_REG_DELAY_TCHSH_MASK)
+ << CQSPI_REG_DELAY_TCHSH_LSB);
+ reg |= ((tslch & CQSPI_REG_DELAY_TSLCH_MASK)
+ << CQSPI_REG_DELAY_TSLCH_LSB);
+ reg |= ((tsd2d & CQSPI_REG_DELAY_TSD2D_MASK)
+ << CQSPI_REG_DELAY_TSD2D_LSB);
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_DELAY);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+void cadence_qspi_apb_controller_init(void *reg_base)
+{
+ unsigned reg;
+
+ cadence_qspi_apb_controller_disable(reg_base);
+
+ /* Configure the device size and address bytes */
+ reg = CQSPI_READL(reg_base + CQSPI_REG_SIZE);
+ /* Clear the previous value */
+ reg &= ~(CQSPI_REG_SIZE_PAGE_MASK << CQSPI_REG_SIZE_PAGE_LSB);
+ reg &= ~(CQSPI_REG_SIZE_BLOCK_MASK << CQSPI_REG_SIZE_BLOCK_LSB);
+ reg |= (CONFIG_CQSPI_PAGE_SIZE << CQSPI_REG_SIZE_PAGE_LSB);
+ reg |= (CONFIG_CQSPI_BLOCK_SIZE << CQSPI_REG_SIZE_BLOCK_LSB);
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_SIZE);
+
+ /* Configure the remap address register, no remap */
+ CQSPI_WRITEL(0, reg_base + CQSPI_REG_REMAP);
+
+ /* Disable all interrupts */
+ CQSPI_WRITEL(0, reg_base + CQSPI_REG_IRQMASK);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+static int cadence_qspi_apb_exec_flash_cmd(void *reg_base,
+ unsigned int reg)
+{
+ unsigned int retry = CQSPI_REG_RETRY;
+
+ /* Write the CMDCTRL without start execution. */
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CMDCTRL);
+ /* Start execute */
+ reg |= CQSPI_REG_CMDCTRL_EXECUTE_MASK;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CMDCTRL);
+
+ while (retry--) {
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CMDCTRL);
+ if ((reg & CQSPI_REG_CMDCTRL_INPROGRESS_MASK) == 0)
+ break;
+ udelay(1);
+ }
+
+ if (!retry) {
+ printf("QSPI: flash command execution timeout\n");
+ return -EIO;
+ }
+
+ /* Polling QSPI idle status. */
+ if (!cadence_qspi_wait_idle(reg_base))
+ return -EIO;
+
+ return 0;
+}
+
+/* For command RDID, RDSR. */
+int cadence_qspi_apb_command_read(void *reg_base,
+ unsigned int cmdlen, const u8 *cmdbuf, unsigned int rxlen,
+ u8 *rxbuf)
+{
+ unsigned int reg;
+ unsigned int read_len;
+ int status;
+
+ if (!cmdlen || rxlen > CQSPI_STIG_DATA_LEN_MAX || rxbuf == NULL) {
+ printf("QSPI: Invalid input arguments cmdlen %d "
+ "rxlen %d\n", cmdlen, rxlen);
+ return -EINVAL;
+ }
+
+ reg = cmdbuf[0] << CQSPI_REG_CMDCTRL_OPCODE_LSB;
+
+ reg |= (0x1 << CQSPI_REG_CMDCTRL_RD_EN_LSB);
+
+ /* 0 means 1 byte. */
+ reg |= (((rxlen - 1) & CQSPI_REG_CMDCTRL_RD_BYTES_MASK)
+ << CQSPI_REG_CMDCTRL_RD_BYTES_LSB);
+ status = cadence_qspi_apb_exec_flash_cmd(reg_base, reg);
+ if (status != 0)
+ return status;
+
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CMDREADDATALOWER);
+
+ /* Put the read value into rx_buf */
+ read_len = (rxlen > 4) ? 4 : rxlen;
+ memcpy(rxbuf, ®, read_len);
+ rxbuf += read_len;
+
+ if (rxlen > 4) {
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CMDREADDATAUPPER);
+
+ read_len = rxlen - read_len;
+ memcpy(rxbuf, ®, read_len);
+ }
+ return 0;
+}
+
+/* For commands: WRSR, WREN, WRDI, CHIP_ERASE, BE, etc. */
+int cadence_qspi_apb_command_write(void *reg_base, unsigned int cmdlen,
+ const u8 *cmdbuf, unsigned int txlen, const u8 *txbuf)
+{
+ unsigned int reg = 0;
+ unsigned int addr_value;
+ unsigned int wr_data;
+ unsigned int wr_len;
+
+ if (!cmdlen || cmdlen > 5 || txlen > 8 || cmdbuf == NULL) {
+ printf("QSPI: Invalid input arguments cmdlen %d txlen %d\n",
+ cmdlen, txlen);
+ return -EINVAL;
+ }
+
+ reg |= cmdbuf[0] << CQSPI_REG_CMDCTRL_OPCODE_LSB;
+
+ if (cmdlen == 4 || cmdlen == 5) {
+ /* Command with address */
+ reg |= (0x1 << CQSPI_REG_CMDCTRL_ADDR_EN_LSB);
+ /* Number of bytes to write. */
+ reg |= ((cmdlen - 2) & CQSPI_REG_CMDCTRL_ADD_BYTES_MASK)
+ << CQSPI_REG_CMDCTRL_ADD_BYTES_LSB;
+ /* Get address */
+ addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1],
+ cmdlen >= 5 ? 4 : 3);
+
+ CQSPI_WRITEL(addr_value, reg_base + CQSPI_REG_CMDADDRESS);
+ }
+
+ if (txlen) {
+ /* writing data = yes */
+ reg |= (0x1 << CQSPI_REG_CMDCTRL_WR_EN_LSB);
+ reg |= ((txlen - 1) & CQSPI_REG_CMDCTRL_WR_BYTES_MASK)
+ << CQSPI_REG_CMDCTRL_WR_BYTES_LSB;
+
+ wr_len = txlen > 4 ? 4 : txlen;
+ memcpy(&wr_data, txbuf, wr_len);
+ CQSPI_WRITEL(wr_data, reg_base +
+ CQSPI_REG_CMDWRITEDATALOWER);
+
+ if (txlen > 4) {
+ txbuf += wr_len;
+ wr_len = txlen - wr_len;
+ memcpy(&wr_data, txbuf, wr_len);
+ CQSPI_WRITEL(wr_data, reg_base +
+ CQSPI_REG_CMDWRITEDATAUPPER);
+ }
+ }
+
+ /* Execute the command */
+ return cadence_qspi_apb_exec_flash_cmd(reg_base, reg);
+}
+
+/* Opcode + Address (3/4 bytes) + dummy bytes (0-4 bytes) */
+int cadence_qspi_apb_indirect_read_setup(void *reg_base,
+ unsigned int ahb_phy_addr, unsigned int cmdlen, const u8 *cmdbuf)
+{
+ unsigned int reg;
+ unsigned int rd_reg;
+ unsigned int addr_value;
+ unsigned int dummy_clk;
+ unsigned int dummy_bytes;
+ unsigned int addr_bytes;
+
+ /*
+ * Identify addr_byte. All NOR flash device drivers are using fast read
+ * which always expecting 1 dummy byte, 1 cmd byte and 3/4 addr byte.
+ * With that, the length is in value of 5 or 6. Only FRAM chip from
+ * ramtron using normal read (which won't need dummy byte).
+ * Unlikely NOR flash using normal read due to performance issue.
+ */
+ if (cmdlen >= 5)
+ /* to cater fast read where cmd + addr + dummy */
+ addr_bytes = cmdlen - 2;
+ else
+ /* for normal read (only ramtron as of now) */
+ addr_bytes = cmdlen - 1;
+
+ /* Setup the indirect trigger address */
+ CQSPI_WRITEL((ahb_phy_addr & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
+ reg_base + CQSPI_REG_INDIRECTTRIGGER);
+
+ /* Configure SRAM partition for read. */
+ CQSPI_WRITEL(CQSPI_REG_SRAM_PARTITION_RD, reg_base +
+ CQSPI_REG_SRAMPARTITION);
+
+ /* Configure the opcode */
+ rd_reg = cmdbuf[0] << CQSPI_REG_RD_INSTR_OPCODE_LSB;
+
+#if (CONFIG_SPI_FLASH_QUAD == 1)
+ /* Instruction and address at DQ0, data at DQ0-3. */
+ rd_reg |= CQSPI_INST_TYPE_QUAD << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB;
+#endif
+
+ /* Get address */
+ addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
+ CQSPI_WRITEL(addr_value, reg_base + CQSPI_REG_INDIRECTRDSTARTADDR);
+
+ /* The remaining lenght is dummy bytes. */
+ dummy_bytes = cmdlen - addr_bytes - 1;
+ if (dummy_bytes) {
+
+ if (dummy_bytes > CQSPI_DUMMY_BYTES_MAX)
+ dummy_bytes = CQSPI_DUMMY_BYTES_MAX;
+
+ rd_reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB);
+#if defined(CONFIG_SPL_SPI_XIP) && defined(CONFIG_SPL_BUILD)
+ CQSPI_WRITEL(0x0, reg_base + CQSPI_REG_MODE_BIT);
+#else
+ CQSPI_WRITEL(0xFF, reg_base + CQSPI_REG_MODE_BIT);
+#endif
+
+ /* Convert to clock cycles. */
+ dummy_clk = dummy_bytes * CQSPI_DUMMY_CLKS_PER_BYTE;
+ /* Need to minus the mode byte (8 clocks). */
+ dummy_clk -= CQSPI_DUMMY_CLKS_PER_BYTE;
+
+ if (dummy_clk)
+ rd_reg |= (dummy_clk & CQSPI_REG_RD_INSTR_DUMMY_MASK)
+ << CQSPI_REG_RD_INSTR_DUMMY_LSB;
+ }
+
+ CQSPI_WRITEL(rd_reg, reg_base + CQSPI_REG_RD_INSTR);
+
+ /* set device size */
+ reg = CQSPI_READL(reg_base + CQSPI_REG_SIZE);
+ reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
+ reg |= (addr_bytes - 1);
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_SIZE);
+ return 0;
+}
+
+int cadence_qspi_apb_indirect_read_execute(void *reg_base,
+ void *ahb_base_addr, unsigned int rxlen, u8 *rxbuf)
+{
+ unsigned int reg;
+
+ CQSPI_WRITEL(rxlen, reg_base + CQSPI_REG_INDIRECTRDBYTES);
+
+ /* Start the indirect read transfer */
+ CQSPI_WRITEL(CQSPI_REG_INDIRECTRD_START_MASK,
+ reg_base + CQSPI_REG_INDIRECTRD);
+
+ if (qspi_read_sram_fifo_poll(reg_base, (void *)rxbuf,
+ (const void *)ahb_base_addr, rxlen)) {
+ goto failrd;
+ }
+
+ /* Check flash indirect controller */
+ reg = CQSPI_READL(reg_base + CQSPI_REG_INDIRECTRD);
+ if (!(reg & CQSPI_REG_INDIRECTRD_DONE_MASK)) {
+ reg = CQSPI_READL(reg_base + CQSPI_REG_INDIRECTRD);
+ printf("QSPI: indirect completion status "
+ "error with reg 0x%08x\n", reg);
+ goto failrd;
+ }
+
+ /* Clear indirect completion status */
+ CQSPI_WRITEL(CQSPI_REG_INDIRECTRD_DONE_MASK,
+ reg_base + CQSPI_REG_INDIRECTRD);
+ return 0;
+
+failrd:
+ /* Cancel the indirect read */
+ CQSPI_WRITEL(CQSPI_REG_INDIRECTRD_CANCEL_MASK,
+ reg_base + CQSPI_REG_INDIRECTRD);
+ return -1;
+}
+
+/* Opcode + Address (3/4 bytes) */
+int cadence_qspi_apb_indirect_write_setup(void *reg_base,
+ unsigned int ahb_phy_addr, unsigned int cmdlen, const u8 *cmdbuf)
+{
+ unsigned int reg;
+ unsigned int addr_bytes = cmdlen > 4 ? 4 : 3;
+
+ if (cmdlen < 4 || cmdbuf == NULL) {
+ printf("QSPI: iInvalid input argument, len %d cmdbuf 0x%08x\n",
+ cmdlen, (unsigned int)cmdbuf);
+ return -EINVAL;
+ }
+ /* Setup the indirect trigger address */
+ CQSPI_WRITEL((ahb_phy_addr & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
+ reg_base + CQSPI_REG_INDIRECTTRIGGER);
+
+ CQSPI_WRITEL(CQSPI_REG_SRAM_PARTITION_WR,
+ reg_base + CQSPI_REG_SRAMPARTITION);
+
+ /* Configure the opcode */
+ reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_WR_INSTR);
+
+ /* Setup write address. */
+ reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_INDIRECTWRSTARTADDR);
+
+ reg = CQSPI_READL(reg_base + CQSPI_REG_SIZE);
+ reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
+ reg |= (addr_bytes - 1);
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_SIZE);
+ return 0;
+}
+
+int cadence_qspi_apb_indirect_write_execute(void *reg_base,
+ void *ahb_base_addr, unsigned int txlen, const u8 *txbuf)
+{
+ unsigned int reg = 0;
+ unsigned int retry;
+
+ /* Configure the indirect read transfer bytes */
+ CQSPI_WRITEL(txlen, reg_base + CQSPI_REG_INDIRECTWRBYTES);
+
+ /* Start the indirect write transfer */
+ CQSPI_WRITEL(CQSPI_REG_INDIRECTWR_START_MASK,
+ reg_base + CQSPI_REG_INDIRECTWR);
+
+ if (qpsi_write_sram_fifo_push(reg_base, ahb_base_addr,
+ (const void *)txbuf, txlen)) {
+ goto failwr;
+ }
+
+ /* Wait until last write is completed (FIFO empty) */
+ retry = CQSPI_REG_RETRY;
+ while (retry--) {
+ reg = CQSPI_GET_WR_SRAM_LEVEL(reg_base);
+ if (reg == 0)
+ break;
+
+ udelay(1);
+ }
+ if (reg != 0) {
+ printf("QSPI: timeout for indirect write\n");
+ goto failwr;
+ }
+
+ /* Check flash indirect controller status */
+ retry = CQSPI_REG_RETRY;
+ while (retry--) {
+ reg = CQSPI_READL(reg_base + CQSPI_REG_INDIRECTWR);
+ if (reg & CQSPI_REG_INDIRECTWR_DONE_MASK)
+ break;
+ udelay(1);
+ }
+ if (!(reg & CQSPI_REG_INDIRECTWR_DONE_MASK)) {
+ printf("QSPI: indirect completion "
+ "status error with reg 0x%08x\n", reg);
+ goto failwr;
+ }
+
+ /* Clear indirect completion status */
+ CQSPI_WRITEL(CQSPI_REG_INDIRECTWR_DONE_MASK,
+ reg_base + CQSPI_REG_INDIRECTWR);
+ return 0;
+
+failwr:
+ /* Cancel the indirect write */
+ CQSPI_WRITEL(CQSPI_REG_INDIRECTWR_CANCEL_MASK,
+ reg_base + CQSPI_REG_INDIRECTWR);
+ return -1;
+}
+
+void cadence_qspi_apb_enter_xip(void *reg_base, char xip_dummy)
+{
+ unsigned int reg;
+
+ /* enter XiP mode immediately and enable direct mode */
+ reg = CQSPI_READL(reg_base + CQSPI_REG_CONFIG);
+ reg |= CQSPI_REG_CONFIG_ENABLE_MASK;
+ reg |= CQSPI_REG_CONFIG_DIRECT_MASK;
+ reg |= CQSPI_REG_CONFIG_XIP_IMM_MASK;
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_CONFIG);
+
+ /* keep the XiP mode */
+ CQSPI_WRITEL(xip_dummy, reg_base + CQSPI_REG_MODE_BIT);
+
+ /* Enable mode bit at devrd */
+ reg = CQSPI_READL(reg_base + CQSPI_REG_RD_INSTR);
+ reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB);
+ CQSPI_WRITEL(reg, reg_base + CQSPI_REG_RD_INSTR);
+}
--
1.7.9.5
More information about the U-Boot
mailing list