From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
roms/u-boot/drivers/spi/cadence_qspi_apb.c | 812 +++++++++++++++++++++++++++++
1 file changed, 812 insertions(+)
create mode 100644 roms/u-boot/drivers/spi/cadence_qspi_apb.c
(limited to 'roms/u-boot/drivers/spi/cadence_qspi_apb.c')
diff --git a/roms/u-boot/drivers/spi/cadence_qspi_apb.c b/roms/u-boot/drivers/spi/cadence_qspi_apb.c
new file mode 100644
index 000000000..b051f462e
--- /dev/null
+++ b/roms/u-boot/drivers/spi/cadence_qspi_apb.c
@@ -0,0 +1,812 @@
+/*
+ * Copyright (C) 2012 Altera Corporation <www.altera.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * - Neither the name of the Altera Corporation nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL ALTERA CORPORATION BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <common.h>
+#include <log.h>
+#include <asm/io.h>
+#include <dma.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <wait_bit.h>
+#include <spi.h>
+#include <spi-mem.h>
+#include <malloc.h>
+#include "cadence_qspi.h"
+
+#define CQSPI_REG_POLL_US 1 /* 1us */
+#define CQSPI_REG_RETRY 10000
+#define CQSPI_POLL_IDLE_RETRY 3
+
+/* Transfer mode */
+#define CQSPI_INST_TYPE_SINGLE 0
+#define CQSPI_INST_TYPE_DUAL 1
+#define CQSPI_INST_TYPE_QUAD 2
+#define CQSPI_INST_TYPE_OCTAL 3
+
+#define CQSPI_STIG_DATA_LEN_MAX 8
+
+#define CQSPI_DUMMY_CLKS_PER_BYTE 8
+#define CQSPI_DUMMY_BYTES_MAX 4
+
+/****************************************************************************
+ * Controller's configuration and status register (offset from QSPI_BASE)
+ ****************************************************************************/
+#define CQSPI_REG_CONFIG 0x00
+#define CQSPI_REG_CONFIG_ENABLE BIT(0)
+#define CQSPI_REG_CONFIG_CLK_POL BIT(1)
+#define CQSPI_REG_CONFIG_CLK_PHA BIT(2)
+#define CQSPI_REG_CONFIG_DIRECT BIT(7)
+#define CQSPI_REG_CONFIG_DECODE BIT(9)
+#define CQSPI_REG_CONFIG_XIP_IMM BIT(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_WR_INSTR_TYPE_DATA_LSB 16
+
+#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_REG_RD_DATA_CAPTURE 0x10
+#define CQSPI_REG_RD_DATA_CAPTURE_BYPASS BIT(0)
+#define CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB 1
+#define CQSPI_REG_RD_DATA_CAPTURE_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 BIT(0)
+#define CQSPI_REG_INDIRECTRD_CANCEL BIT(1)
+#define CQSPI_REG_INDIRECTRD_INPROGRESS BIT(2)
+#define CQSPI_REG_INDIRECTRD_DONE BIT(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 BIT(0)
+#define CQSPI_REG_CMDCTRL_INPROGRESS BIT(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 BIT(0)
+#define CQSPI_REG_INDIRECTWR_CANCEL BIT(1)
+#define CQSPI_REG_INDIRECTWR_INPROGRESS BIT(2)
+#define CQSPI_REG_INDIRECTWR_DONE BIT(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) \
+ ((readl(base + CQSPI_REG_CONFIG) >> \
+ CQSPI_REG_CONFIG_IDLE_LSB) & 0x1)
+
+#define CQSPI_GET_RD_SRAM_LEVEL(reg_base) \
+ (((readl(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \
+ CQSPI_REG_SDRAMLEVEL_RD_LSB) & CQSPI_REG_SDRAMLEVEL_RD_MASK)
+
+#define CQSPI_GET_WR_SRAM_LEVEL(reg_base) \
+ (((readl(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \
+ CQSPI_REG_SDRAMLEVEL_WR_LSB) & CQSPI_REG_SDRAMLEVEL_WR_MASK)
+
+void cadence_qspi_apb_controller_enable(void *reg_base)
+{
+ unsigned int reg;
+ reg = readl(reg_base + CQSPI_REG_CONFIG);
+ reg |= CQSPI_REG_CONFIG_ENABLE;
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+}
+
+void cadence_qspi_apb_controller_disable(void *reg_base)
+{
+ unsigned int reg;
+ reg = readl(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~CQSPI_REG_CONFIG_ENABLE;
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+}
+
+void cadence_qspi_apb_dac_mode_enable(void *reg_base)
+{
+ unsigned int reg;
+
+ reg = readl(reg_base + CQSPI_REG_CONFIG);
+ reg |= CQSPI_REG_CONFIG_DIRECT;
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+}
+
+/* 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 = readl(reg_base + CQSPI_REG_RD_DATA_CAPTURE);
+
+ if (bypass)
+ reg |= CQSPI_REG_RD_DATA_CAPTURE_BYPASS;
+ else
+ reg &= ~CQSPI_REG_RD_DATA_CAPTURE_BYPASS;
+
+ reg &= ~(CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK
+ << CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB);
+
+ reg |= (delay & CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK)
+ << CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB;
+
+ writel(reg, reg_base + CQSPI_REG_RD_DATA_CAPTURE);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+}
+
+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 = readl(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~(CQSPI_REG_CONFIG_BAUD_MASK << CQSPI_REG_CONFIG_BAUD_LSB);
+
+ /*
+ * The baud_div field in the config reg is 4 bits, and the ref clock is
+ * divided by 2 * (baud_div + 1). Round up the divider to ensure the
+ * SPI clock rate is less than or equal to the requested clock rate.
+ */
+ div = DIV_ROUND_UP(ref_clk_hz, sclk_hz * 2) - 1;
+
+ /* ensure the baud rate doesn't exceed the max value */
+ if (div > CQSPI_REG_CONFIG_BAUD_MASK)
+ div = CQSPI_REG_CONFIG_BAUD_MASK;
+
+ debug("%s: ref_clk %dHz sclk %dHz Div 0x%x, actual %dHz\n", __func__,
+ ref_clk_hz, sclk_hz, div, ref_clk_hz / (2 * (div + 1)));
+
+ reg |= (div << CQSPI_REG_CONFIG_BAUD_LSB);
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+}
+
+void cadence_qspi_apb_set_clk_mode(void *reg_base, uint mode)
+{
+ unsigned int reg;
+
+ cadence_qspi_apb_controller_disable(reg_base);
+ reg = readl(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~(CQSPI_REG_CONFIG_CLK_POL | CQSPI_REG_CONFIG_CLK_PHA);
+
+ if (mode & SPI_CPOL)
+ reg |= CQSPI_REG_CONFIG_CLK_POL;
+ if (mode & SPI_CPHA)
+ reg |= CQSPI_REG_CONFIG_CLK_PHA;
+
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+}
+
+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 = readl(reg_base + CQSPI_REG_CONFIG);
+ /* docoder */
+ if (decoder_enable) {
+ reg |= CQSPI_REG_CONFIG_DECODE;
+ } else {
+ reg &= ~CQSPI_REG_CONFIG_DECODE;
+ /* 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;
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+}
+
+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 = DIV_ROUND_UP(1000000000, ref_clk);
+
+ /* Convert to ns. */
+ sclk_ns = DIV_ROUND_UP(1000000000, sclk_hz);
+
+ /* The controller adds additional delay to that programmed in the reg */
+ if (tshsl_ns >= sclk_ns + ref_clk_ns)
+ tshsl_ns -= sclk_ns + ref_clk_ns;
+ if (tchsh_ns >= sclk_ns + 3 * ref_clk_ns)
+ tchsh_ns -= sclk_ns + 3 * ref_clk_ns;
+ tshsl = DIV_ROUND_UP(tshsl_ns, ref_clk_ns);
+ tchsh = DIV_ROUND_UP(tchsh_ns, ref_clk_ns);
+ tslch = DIV_ROUND_UP(tslch_ns, ref_clk_ns);
+ tsd2d = DIV_ROUND_UP(tsd2d_ns, ref_clk_ns);
+
+ 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);
+ writel(reg, reg_base + CQSPI_REG_DELAY);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+}
+
+void cadence_qspi_apb_controller_init(struct cadence_spi_plat *plat)
+{
+ unsigned reg;
+
+ cadence_qspi_apb_controller_disable(plat->regbase);
+
+ /* Configure the device size and address bytes */
+ reg = readl(plat->regbase + 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 |= (plat->page_size << CQSPI_REG_SIZE_PAGE_LSB);
+ reg |= (plat->block_size << CQSPI_REG_SIZE_BLOCK_LSB);
+ writel(reg, plat->regbase + CQSPI_REG_SIZE);
+
+ /* Configure the remap address register, no remap */
+ writel(0, plat->regbase + CQSPI_REG_REMAP);
+
+ /* Indirect mode configurations */
+ writel(plat->fifo_depth / 2, plat->regbase + CQSPI_REG_SRAMPARTITION);
+
+ /* Disable all interrupts */
+ writel(0, plat->regbase + CQSPI_REG_IRQMASK);
+
+ cadence_qspi_apb_controller_enable(plat->regbase);
+}
+
+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. */
+ writel(reg, reg_base + CQSPI_REG_CMDCTRL);
+ /* Start execute */
+ reg |= CQSPI_REG_CMDCTRL_EXECUTE;
+ writel(reg, reg_base + CQSPI_REG_CMDCTRL);
+
+ while (retry--) {
+ reg = readl(reg_base + CQSPI_REG_CMDCTRL);
+ if ((reg & CQSPI_REG_CMDCTRL_INPROGRESS) == 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, const struct spi_mem_op *op)
+{
+ unsigned int reg;
+ unsigned int read_len;
+ int status;
+ unsigned int rxlen = op->data.nbytes;
+ void *rxbuf = op->data.buf.in;
+
+ if (rxlen > CQSPI_STIG_DATA_LEN_MAX || !rxbuf) {
+ printf("QSPI: Invalid input arguments rxlen %u\n", rxlen);
+ return -EINVAL;
+ }
+
+ reg = op->cmd.opcode << 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 = 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 = 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, const struct spi_mem_op *op)
+{
+ unsigned int reg = 0;
+ unsigned int wr_data;
+ unsigned int wr_len;
+ unsigned int txlen = op->data.nbytes;
+ const void *txbuf = op->data.buf.out;
+ u32 addr;
+
+ /* Reorder address to SPI bus order if only transferring address */
+ if (!txlen) {
+ addr = cpu_to_be32(op->addr.val);
+ if (op->addr.nbytes == 3)
+ addr >>= 8;
+ txbuf = &addr;
+ txlen = op->addr.nbytes;
+ }
+
+ if (txlen > CQSPI_STIG_DATA_LEN_MAX) {
+ printf("QSPI: Invalid input arguments txlen %u\n", txlen);
+ return -EINVAL;
+ }
+
+ reg |= op->cmd.opcode << CQSPI_REG_CMDCTRL_OPCODE_LSB;
+
+ 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);
+ 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);
+ 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_read_setup(struct cadence_spi_plat *plat,
+ const struct spi_mem_op *op)
+{
+ unsigned int reg;
+ unsigned int rd_reg;
+ unsigned int dummy_clk;
+ unsigned int dummy_bytes = op->dummy.nbytes;
+
+ /* Setup the indirect trigger address */
+ writel(plat->trigger_address,
+ plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
+
+ /* Configure the opcode */
+ rd_reg = op->cmd.opcode << CQSPI_REG_RD_INSTR_OPCODE_LSB;
+
+ if (op->data.buswidth == 8)
+ /* Instruction and address at DQ0, data at DQ0-7. */
+ rd_reg |= CQSPI_INST_TYPE_OCTAL << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB;
+ else if (op->data.buswidth == 4)
+ /* Instruction and address at DQ0, data at DQ0-3. */
+ rd_reg |= CQSPI_INST_TYPE_QUAD << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB;
+
+ writel(op->addr.val, plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
+
+ if (dummy_bytes) {
+ if (dummy_bytes > CQSPI_DUMMY_BYTES_MAX)
+ dummy_bytes = CQSPI_DUMMY_BYTES_MAX;
+
+ /* Convert to clock cycles. */
+ dummy_clk = dummy_bytes * CQSPI_DUMMY_CLKS_PER_BYTE;
+
+ if (dummy_clk)
+ rd_reg |= (dummy_clk & CQSPI_REG_RD_INSTR_DUMMY_MASK)
+ << CQSPI_REG_RD_INSTR_DUMMY_LSB;
+ }
+
+ writel(rd_reg, plat->regbase + CQSPI_REG_RD_INSTR);
+
+ /* set device size */
+ reg = readl(plat->regbase + CQSPI_REG_SIZE);
+ reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
+ reg |= (op->addr.nbytes - 1);
+ writel(reg, plat->regbase + CQSPI_REG_SIZE);
+ return 0;
+}
+
+static u32 cadence_qspi_get_rd_sram_level(struct cadence_spi_plat *plat)
+{
+ u32 reg = readl(plat->regbase + CQSPI_REG_SDRAMLEVEL);
+ reg >>= CQSPI_REG_SDRAMLEVEL_RD_LSB;
+ return reg & CQSPI_REG_SDRAMLEVEL_RD_MASK;
+}
+
+static int cadence_qspi_wait_for_data(struct cadence_spi_plat *plat)
+{
+ unsigned int timeout = 10000;
+ u32 reg;
+
+ while (timeout--) {
+ reg = cadence_qspi_get_rd_sram_level(plat);
+ if (reg)
+ return reg;
+ udelay(1);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int
+cadence_qspi_apb_indirect_read_execute(struct cadence_spi_plat *plat,
+ unsigned int n_rx, u8 *rxbuf)
+{
+ unsigned int remaining = n_rx;
+ unsigned int bytes_to_read = 0;
+ int ret;
+
+ writel(n_rx, plat->regbase + CQSPI_REG_INDIRECTRDBYTES);
+
+ /* Start the indirect read transfer */
+ writel(CQSPI_REG_INDIRECTRD_START,
+ plat->regbase + CQSPI_REG_INDIRECTRD);
+
+ while (remaining > 0) {
+ ret = cadence_qspi_wait_for_data(plat);
+ if (ret < 0) {
+ printf("Indirect write timed out (%i)\n", ret);
+ goto failrd;
+ }
+
+ bytes_to_read = ret;
+
+ while (bytes_to_read != 0) {
+ bytes_to_read *= plat->fifo_width;
+ bytes_to_read = bytes_to_read > remaining ?
+ remaining : bytes_to_read;
+ /*
+ * Handle non-4-byte aligned access to avoid
+ * data abort.
+ */
+ if (((uintptr_t)rxbuf % 4) || (bytes_to_read % 4))
+ readsb(plat->ahbbase, rxbuf, bytes_to_read);
+ else
+ readsl(plat->ahbbase, rxbuf,
+ bytes_to_read >> 2);
+ rxbuf += bytes_to_read;
+ remaining -= bytes_to_read;
+ bytes_to_read = cadence_qspi_get_rd_sram_level(plat);
+ }
+ }
+
+ /* Check indirect done status */
+ ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_INDIRECTRD,
+ CQSPI_REG_INDIRECTRD_DONE, 1, 10, 0);
+ if (ret) {
+ printf("Indirect read completion error (%i)\n", ret);
+ goto failrd;
+ }
+
+ /* Clear indirect completion status */
+ writel(CQSPI_REG_INDIRECTRD_DONE,
+ plat->regbase + CQSPI_REG_INDIRECTRD);
+
+ return 0;
+
+failrd:
+ /* Cancel the indirect read */
+ writel(CQSPI_REG_INDIRECTRD_CANCEL,
+ plat->regbase + CQSPI_REG_INDIRECTRD);
+ return ret;
+}
+
+int cadence_qspi_apb_read_execute(struct cadence_spi_plat *plat,
+ const struct spi_mem_op *op)
+{
+ u64 from = op->addr.val;
+ void *buf = op->data.buf.in;
+ size_t len = op->data.nbytes;
+
+ if (plat->use_dac_mode && (from + len < plat->ahbsize)) {
+ if (len < 256 ||
+ dma_memcpy(buf, plat->ahbbase + from, len) < 0) {
+ memcpy_fromio(buf, plat->ahbbase + from, len);
+ }
+ if (!cadence_qspi_wait_idle(plat->regbase))
+ return -EIO;
+ return 0;
+ }
+
+ return cadence_qspi_apb_indirect_read_execute(plat, len, buf);
+}
+
+/* Opcode + Address (3/4 bytes) */
+int cadence_qspi_apb_write_setup(struct cadence_spi_plat *plat,
+ const struct spi_mem_op *op)
+{
+ unsigned int reg;
+
+ /* Setup the indirect trigger address */
+ writel(plat->trigger_address,
+ plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
+
+ /* Configure the opcode */
+ reg = op->cmd.opcode << CQSPI_REG_WR_INSTR_OPCODE_LSB;
+ writel(reg, plat->regbase + CQSPI_REG_WR_INSTR);
+
+ writel(op->addr.val, plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
+
+ reg = readl(plat->regbase + CQSPI_REG_SIZE);
+ reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
+ reg |= (op->addr.nbytes - 1);
+ writel(reg, plat->regbase + CQSPI_REG_SIZE);
+ return 0;
+}
+
+static int
+cadence_qspi_apb_indirect_write_execute(struct cadence_spi_plat *plat,
+ unsigned int n_tx, const u8 *txbuf)
+{
+ unsigned int page_size = plat->page_size;
+ unsigned int remaining = n_tx;
+ const u8 *bb_txbuf = txbuf;
+ void *bounce_buf = NULL;
+ unsigned int write_bytes;
+ int ret;
+
+ /*
+ * Use bounce buffer for non 32 bit aligned txbuf to avoid data
+ * aborts
+ */
+ if ((uintptr_t)txbuf % 4) {
+ bounce_buf = malloc(n_tx);
+ if (!bounce_buf)
+ return -ENOMEM;
+ memcpy(bounce_buf, txbuf, n_tx);
+ bb_txbuf = bounce_buf;
+ }
+
+ /* Configure the indirect read transfer bytes */
+ writel(n_tx, plat->regbase + CQSPI_REG_INDIRECTWRBYTES);
+
+ /* Start the indirect write transfer */
+ writel(CQSPI_REG_INDIRECTWR_START,
+ plat->regbase + CQSPI_REG_INDIRECTWR);
+
+ while (remaining > 0) {
+ write_bytes = remaining > page_size ? page_size : remaining;
+ writesl(plat->ahbbase, bb_txbuf, write_bytes >> 2);
+ if (write_bytes % 4)
+ writesb(plat->ahbbase,
+ bb_txbuf + rounddown(write_bytes, 4),
+ write_bytes % 4);
+
+ ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_SDRAMLEVEL,
+ CQSPI_REG_SDRAMLEVEL_WR_MASK <<
+ CQSPI_REG_SDRAMLEVEL_WR_LSB, 0, 10, 0);
+ if (ret) {
+ printf("Indirect write timed out (%i)\n", ret);
+ goto failwr;
+ }
+
+ bb_txbuf += write_bytes;
+ remaining -= write_bytes;
+ }
+
+ /* Check indirect done status */
+ ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_INDIRECTWR,
+ CQSPI_REG_INDIRECTWR_DONE, 1, 10, 0);
+ if (ret) {
+ printf("Indirect write completion error (%i)\n", ret);
+ goto failwr;
+ }
+
+ /* Clear indirect completion status */
+ writel(CQSPI_REG_INDIRECTWR_DONE,
+ plat->regbase + CQSPI_REG_INDIRECTWR);
+ if (bounce_buf)
+ free(bounce_buf);
+ return 0;
+
+failwr:
+ /* Cancel the indirect write */
+ writel(CQSPI_REG_INDIRECTWR_CANCEL,
+ plat->regbase + CQSPI_REG_INDIRECTWR);
+ if (bounce_buf)
+ free(bounce_buf);
+ return ret;
+}
+
+int cadence_qspi_apb_write_execute(struct cadence_spi_plat *plat,
+ const struct spi_mem_op *op)
+{
+ u32 to = op->addr.val;
+ const void *buf = op->data.buf.out;
+ size_t len = op->data.nbytes;
+
+ if (plat->use_dac_mode && (to + len < plat->ahbsize)) {
+ memcpy_toio(plat->ahbbase + to, buf, len);
+ if (!cadence_qspi_wait_idle(plat->regbase))
+ return -EIO;
+ return 0;
+ }
+
+ return cadence_qspi_apb_indirect_write_execute(plat, len, buf);
+}
+
+void cadence_qspi_apb_enter_xip(void *reg_base, char xip_dummy)
+{
+ unsigned int reg;
+
+ /* enter XiP mode immediately and enable direct mode */
+ reg = readl(reg_base + CQSPI_REG_CONFIG);
+ reg |= CQSPI_REG_CONFIG_ENABLE;
+ reg |= CQSPI_REG_CONFIG_DIRECT;
+ reg |= CQSPI_REG_CONFIG_XIP_IMM;
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+
+ /* keep the XiP mode */
+ writel(xip_dummy, reg_base + CQSPI_REG_MODE_BIT);
+
+ /* Enable mode bit at devrd */
+ reg = readl(reg_base + CQSPI_REG_RD_INSTR);
+ reg |= (1 << CQSPI_REG_RD_INSTR_MODE_EN_LSB);
+ writel(reg, reg_base + CQSPI_REG_RD_INSTR);
+}
--
cgit