Hi Jagan,
On Thu, 2013-12-19 at 21:39 +0530, Jagan Teki wrote:
Thanks for your patch.
Please see the typical driver code suggestions on below thread. http://u-boot.10912.n7.nabble.com/Suggestions-for-SPI-driver-pusher-td161008...
Try to avoid the header files make sure to code everything in single .c file. Also add some documents as well as test log on doc/ folder if possible.
Thanks for pointing the info. I agree that it would much readable if all drivers are following same standard. I will reformat the code and re-submit again. Thanks
Chin Liang
On Thu, Dec 19, 2013 at 1:35 AM, Chin Liang See clsee@altera.com wrote:
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@altera.com Cc: Jagannadha Sutradharudu Teki jaganna@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;elsemode = CQSPI_INDIRECT_READ;} else if (data_out && !(flags & SPI_XFER_BEGIN)) {/* write */if (!CQSPI_IS_ADDR(cadence_qspi->cmd_len))mode = CQSPI_STIG_WRITE;elsemode = 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++;elsecount = 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);elsereg &= ~(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);elsediv = (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