/* Freeze channel 0 to 2 */
for (channel_id = 0; channel_id <= 2; channel_id++) {
ioctrl_reg_offset = (u32)(
- &freeze_controller_base->vioctrl +
- (channel_id << SYSMGR_FRZCTRL_VIOCTRL_SHIFT));
+ &freeze_controller_base->vioctrl + channel_id);
/*
* Assert active low enrnsl, plniotri
/* Thaw channel 0 to 2 */
for (channel_id = 0; channel_id <= 2; channel_id++) {
ioctrl_reg_offset
- = (u32)(&freeze_controller_base->vioctrl
- + (channel_id << SYSMGR_FRZCTRL_VIOCTRL_SHIFT));
+ = (u32)(&freeze_controller_base->vioctrl + channel_id);
/*
* Assert active low bhniotri signal and
{
const void *reset = &reset_manager_base->per_mod_reset;
- clrbits_le32(reset, 1 << RSTMGR_PERMODRST_SPIM0_LSB);
- clrbits_le32(reset, 1 << RSTMGR_PERMODRST_SPIM1_LSB);
+ clrbits_le32(reset, (1 << RSTMGR_PERMODRST_SPIM0_LSB) |
+ (1 << RSTMGR_PERMODRST_SPIM1_LSB));
}
/*
* Copyright (C) 2012 Altera <www.altera.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include "skeleton.dtsi"
clock-names = "biu", "ciu";
};
+ qspi: spi@ff705000 {
+ compatible = "cadence,qspi";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xff705000 0x1000>,
+ <0xffa00000 0x1000>;
+ interrupts = <0 151 4>;
+ clocks = <&qspi_clk>;
+ ext-decoder = <0>; /* external decoder */
+ num-chipselect = <4>;
+ fifo-depth = <128>;
+ bus-num = <2>;
+ status = "disabled";
+ };
+
+ spi0: spi@fff00000 {
+ compatible = "snps,dw-spi-mmio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xfff00000 0x1000>;
+ interrupts = <0 154 4>;
+ num-chipselect = <4>;
+ bus-num = <0>;
+ tx-dma-channel = <&pdma 16>;
+ rx-dma-channel = <&pdma 17>;
+ clocks = <&per_base_clk>;
+ status = "disabled";
+ };
+
+ spi1: spi@fff01000 {
+ compatible = "snps,dw-spi-mmio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xfff01000 0x1000>;
+ interrupts = <0 156 4>;
+ num-chipselect = <4>;
+ bus-num = <1>;
+ tx-dma-channel = <&pdma 20>;
+ rx-dma-channel = <&pdma 21>;
+ clocks = <&per_base_clk>;
+ status = "disabled";
+ };
+
/* Local timer */
timer@fffec600 {
compatible = "arm,cortex-a9-twd-timer";
/*
* Copyright (C) 2012 Altera Corporation <www.altera.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-2.0+
*/
/dts-v1/;
/*
* Copyright (C) 2014 Steffen Trumtrar <s.trumtrar@pengutronix.de>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include "socfpga_cyclone5.dtsi"
bootargs = "console=ttyS0,115200";
};
+ aliases {
+ spi0 = "/spi@ff705000"; /* QSPI */
+ spi1 = "/spi@fff00000";
+ spi2 = "/spi@fff01000";
+ };
+
memory {
name = "memory";
device_type = "memory";
&mmc {
status = "okay";
};
+
+&qspi {
+ status = "okay";
+
+ flash0: n25q00@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "n25q00";
+ reg = <0>; /* chip select */
+ spi-max-frequency = <50000000>;
+ m25p,fast-read;
+ page-size = <256>;
+ block-size = <16>; /* 2^16, 64KB */
+ read-delay = <4>; /* delay value in read data capture register */
+ tshsl-ns = <50>;
+ tsd2d-ns = <50>;
+ tchsh-ns = <4>;
+ tslch-ns = <4>;
+ };
+};
unsigned int cm_get_l4_sp_clk_hz(void);
unsigned int cm_get_mmc_controller_clk_hz(void);
unsigned int cm_get_qspi_controller_clk_hz(void);
+unsigned int cm_get_spi_controller_clk_hz(void);
#endif
typedef struct {
#define SYSMGR_FRZCTRL_HWCTRL_VIO1REQ_MASK 0x00000001
#define SYSMGR_FRZCTRL_HWCTRL_VIO1STATE_ENUM_FROZEN 0x2
#define SYSMGR_FRZCTRL_HWCTRL_VIO1STATE_ENUM_THAWED 0x1
-#define SYSMGR_FRZCTRL_VIOCTRL_SHIFT 0x2
void sys_mgr_frzctrl_freeze_req(void);
void sys_mgr_frzctrl_thaw_req(void);
u32 padding[2];
u32 fifo_single_byte;
u32 fifo_double_byte;
+ u32 fifo_triple_byte;
u32 fifo_quad_byte;
};
F: board/altera/socfpga/
F: include/configs/socfpga_cyclone5.h
F: configs/socfpga_cyclone5_defconfig
+
+SOCRATES BOARD
+M: Stefan Roese <sr@denx.de>
+S: Maintained
+F: configs/socfpga_socrates_defconfig
#include <usb/s3c_udc.h>
#include <usb_mass_storage.h>
+#include <micrel.h>
#include <netdev.h>
+#include <phy.h>
DECLARE_GLOBAL_DATA_PTR;
return 0;
}
+/*
+ * PHY configuration
+ */
+#ifdef CONFIG_PHY_MICREL_KSZ9021
+int board_phy_config(struct phy_device *phydev)
+{
+ int ret;
+ /*
+ * These skew settings for the KSZ9021 ethernet phy is required for ethernet
+ * to work reliably on most flavors of cyclone5 boards.
+ */
+ ret = ksz9021_phy_extended_write(phydev,
+ MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW,
+ 0x0);
+ if (ret)
+ return ret;
+
+ ret = ksz9021_phy_extended_write(phydev,
+ MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW,
+ 0x0);
+ if (ret)
+ return ret;
+
+ ret = ksz9021_phy_extended_write(phydev,
+ MII_KSZ9021_EXT_RGMII_CLOCK_SKEW,
+ 0xf0f0);
+ if (ret)
+ return ret;
+
+ if (phydev->drv->config)
+ return phydev->drv->config(phydev);
+
+ return 0;
+}
+#endif
+
#ifdef CONFIG_USB_GADGET
struct s3c_plat_otg_data socfpga_otg_data = {
.regs_otg = CONFIG_USB_DWC2_REG_ADDR,
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-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
+obj-$(CONFIG_DESIGNWARE_SPI) += designware_spi.o
obj-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
obj-$(CONFIG_FTSSP010_SPI) += ftssp010_spi.o
obj-$(CONFIG_ICH_SPI) += ich.o
--- /dev/null
+/*
+ * Copyright (C) 2012
+ * Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <spi.h>
+#include <asm/errno.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
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int cadence_spi_write_speed(struct udevice *bus, uint hz)
+{
+ struct cadence_spi_platdata *plat = bus->platdata;
+ struct cadence_spi_priv *priv = dev_get_priv(bus);
+
+ cadence_qspi_apb_config_baudrate_div(priv->regbase,
+ CONFIG_CQSPI_REF_CLK, hz);
+
+ /* Reconfigure delay timing if speed is changed. */
+ cadence_qspi_apb_delay(priv->regbase, CONFIG_CQSPI_REF_CLK, hz,
+ plat->tshsl_ns, plat->tsd2d_ns,
+ plat->tchsh_ns, plat->tslch_ns);
+
+ return 0;
+}
+
+/* Calibration sequence to determine the read data capture delay register */
+static int spi_calibration(struct udevice *bus)
+{
+ struct cadence_spi_platdata *plat = bus->platdata;
+ struct cadence_spi_priv *priv = dev_get_priv(bus);
+ void *base = priv->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) */
+ cadence_spi_write_speed(bus, 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 */
+ cadence_spi_write_speed(bus, plat->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);
+ debug("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 */
+ priv->qspi_calibrated_hz = plat->max_hz;
+ priv->qspi_calibrated_cs = spi_chip_select(bus);
+
+ return 0;
+}
+
+static int cadence_spi_set_speed(struct udevice *bus, uint hz)
+{
+ struct cadence_spi_platdata *plat = bus->platdata;
+ struct cadence_spi_priv *priv = dev_get_priv(bus);
+ int err;
+
+ /* Disable QSPI */
+ cadence_qspi_apb_controller_disable(priv->regbase);
+
+ cadence_spi_write_speed(bus, hz);
+
+ /* Calibration required for different SCLK speed or chip select */
+ if (priv->qspi_calibrated_hz != plat->max_hz ||
+ priv->qspi_calibrated_cs != spi_chip_select(bus)) {
+ err = spi_calibration(bus);
+ if (err)
+ return err;
+ }
+
+ /* Enable QSPI */
+ cadence_qspi_apb_controller_enable(priv->regbase);
+
+ debug("%s: speed=%d\n", __func__, hz);
+
+ return 0;
+}
+
+static int cadence_spi_probe(struct udevice *bus)
+{
+ struct cadence_spi_platdata *plat = bus->platdata;
+ struct cadence_spi_priv *priv = dev_get_priv(bus);
+
+ priv->regbase = plat->regbase;
+ priv->ahbbase = plat->ahbbase;
+
+ if (!priv->qspi_is_init) {
+ cadence_qspi_apb_controller_init(plat);
+ priv->qspi_is_init = 1;
+ }
+
+ return 0;
+}
+
+static int cadence_spi_set_mode(struct udevice *bus, uint mode)
+{
+ struct cadence_spi_priv *priv = dev_get_priv(bus);
+ unsigned int clk_pol = (mode & SPI_CPOL) ? 1 : 0;
+ unsigned int clk_pha = (mode & SPI_CPHA) ? 1 : 0;
+
+ /* Disable QSPI */
+ cadence_qspi_apb_controller_disable(priv->regbase);
+
+ /* Set SPI mode */
+ cadence_qspi_apb_set_clk_mode(priv->regbase, clk_pol, clk_pha);
+
+ /* Enable QSPI */
+ cadence_qspi_apb_controller_enable(priv->regbase);
+
+ return 0;
+}
+
+static int cadence_spi_xfer(struct udevice *dev, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct udevice *bus = dev->parent;
+ struct cadence_spi_platdata *plat = bus->platdata;
+ struct cadence_spi_priv *priv = dev_get_priv(bus);
+ void *base = priv->regbase;
+ u8 *cmd_buf = priv->cmd_buf;
+ size_t data_bytes;
+ int err = 0;
+ u32 mode = CQSPI_STIG_WRITE;
+
+ if (flags & SPI_XFER_BEGIN) {
+ /* copy command to local buffer */
+ priv->cmd_len = bitlen / 8;
+ memcpy(cmd_buf, dout, priv->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;
+ }
+ debug("%s: len=%d [bytes]\n", __func__, data_bytes);
+
+ /* Set Chip select */
+ cadence_qspi_apb_chipselect(base, spi_chip_select(dev),
+ CONFIG_CQSPI_DECODER);
+
+ if ((flags & SPI_XFER_END) || (flags == 0)) {
+ if (priv->cmd_len == 0) {
+ printf("QSPI: Error, command is empty.\n");
+ return -1;
+ }
+
+ if (din && data_bytes) {
+ /* read */
+ /* Use STIG if no address. */
+ if (!CQSPI_IS_ADDR(priv->cmd_len))
+ mode = CQSPI_STIG_READ;
+ else
+ mode = CQSPI_INDIRECT_READ;
+ } else if (dout && !(flags & SPI_XFER_BEGIN)) {
+ /* write */
+ if (!CQSPI_IS_ADDR(priv->cmd_len))
+ mode = CQSPI_STIG_WRITE;
+ else
+ mode = CQSPI_INDIRECT_WRITE;
+ }
+
+ switch (mode) {
+ case CQSPI_STIG_READ:
+ err = cadence_qspi_apb_command_read(
+ base, priv->cmd_len, cmd_buf,
+ data_bytes, din);
+
+ break;
+ case CQSPI_STIG_WRITE:
+ err = cadence_qspi_apb_command_write(base,
+ priv->cmd_len, cmd_buf,
+ data_bytes, dout);
+ break;
+ case CQSPI_INDIRECT_READ:
+ err = cadence_qspi_apb_indirect_read_setup(plat,
+ priv->cmd_len, cmd_buf);
+ if (!err) {
+ err = cadence_qspi_apb_indirect_read_execute
+ (plat, data_bytes, din);
+ }
+ break;
+ case CQSPI_INDIRECT_WRITE:
+ err = cadence_qspi_apb_indirect_write_setup
+ (plat, priv->cmd_len, cmd_buf);
+ if (!err) {
+ err = cadence_qspi_apb_indirect_write_execute
+ (plat, data_bytes, dout);
+ }
+ break;
+ default:
+ err = -1;
+ break;
+ }
+
+ if (flags & SPI_XFER_END) {
+ /* clear command buffer */
+ memset(cmd_buf, 0, sizeof(priv->cmd_buf));
+ priv->cmd_len = 0;
+ }
+ }
+
+ return err;
+}
+
+static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
+{
+ struct cadence_spi_platdata *plat = bus->platdata;
+ const void *blob = gd->fdt_blob;
+ int node = bus->of_offset;
+ int subnode;
+ u32 data[4];
+ int ret;
+
+ /* 2 base addresses are needed, lets get them from the DT */
+ ret = fdtdec_get_int_array(blob, node, "reg", data, ARRAY_SIZE(data));
+ if (ret) {
+ printf("Error: Can't get base addresses (ret=%d)!\n", ret);
+ return -ENODEV;
+ }
+
+ plat->regbase = (void *)data[0];
+ plat->ahbbase = (void *)data[2];
+
+ /* Use 500KHz as a suitable default */
+ plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
+ 500000);
+
+ /* All other paramters are embedded in the child node */
+ subnode = fdt_first_subnode(blob, node);
+ if (!subnode) {
+ printf("Error: subnode with SPI flash config missing!\n");
+ return -ENODEV;
+ }
+
+ /* Read other parameters from DT */
+ plat->page_size = fdtdec_get_int(blob, subnode, "page-size", 256);
+ plat->block_size = fdtdec_get_int(blob, subnode, "block-size", 16);
+ plat->tshsl_ns = fdtdec_get_int(blob, subnode, "tshsl-ns", 200);
+ plat->tsd2d_ns = fdtdec_get_int(blob, subnode, "tsd2d-ns", 255);
+ plat->tchsh_ns = fdtdec_get_int(blob, subnode, "tchsh-ns", 20);
+ plat->tslch_ns = fdtdec_get_int(blob, subnode, "tslch-ns", 20);
+
+ debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
+ __func__, plat->regbase, plat->ahbbase, plat->max_hz,
+ plat->page_size);
+
+ return 0;
+}
+
+static const struct dm_spi_ops cadence_spi_ops = {
+ .xfer = cadence_spi_xfer,
+ .set_speed = cadence_spi_set_speed,
+ .set_mode = cadence_spi_set_mode,
+ /*
+ * cs_info is not needed, since we require all chip selects to be
+ * in the device tree explicitly
+ */
+};
+
+static const struct udevice_id cadence_spi_ids[] = {
+ { .compatible = "cadence,qspi" },
+ { }
+};
+
+U_BOOT_DRIVER(cadence_spi) = {
+ .name = "cadence_spi",
+ .id = UCLASS_SPI,
+ .of_match = cadence_spi_ids,
+ .ops = &cadence_spi_ops,
+ .ofdata_to_platdata = cadence_spi_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct cadence_spi_platdata),
+ .priv_auto_alloc_size = sizeof(struct cadence_spi_priv),
+ .per_child_auto_alloc_size = sizeof(struct spi_slave),
+ .probe = cadence_spi_probe,
+};
--- /dev/null
+/*
+ * Copyright (C) 2012
+ * Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __CADENCE_QSPI_H__
+#define __CADENCE_QSPI_H__
+
+#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
+
+struct cadence_spi_platdata {
+ unsigned int max_hz;
+ void *regbase;
+ void *ahbbase;
+
+ u32 page_size;
+ u32 block_size;
+ u32 tshsl_ns;
+ u32 tsd2d_ns;
+ u32 tchsh_ns;
+ u32 tslch_ns;
+};
+
+struct cadence_spi_priv {
+ void *regbase;
+ void *ahbbase;
+ size_t cmd_len;
+ u8 cmd_buf[32];
+ size_t data_len;
+
+ int qspi_is_init;
+ unsigned int qspi_calibrated_hz;
+ unsigned int qspi_calibrated_cs;
+};
+
+/* Functions call declaration */
+void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat);
+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(struct cadence_spi_platdata *plat,
+ unsigned int cmdlen, const u8 *cmdbuf);
+int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
+ unsigned int rxlen, u8 *rxbuf);
+int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
+ unsigned int cmdlen, const u8 *cmdbuf);
+int cadence_qspi_apb_indirect_write_execute(struct cadence_spi_platdata *plat,
+ 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__ */
--- /dev/null
+/*
+ * 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 <asm/io.h>
+#include <asm/errno.h>
+#include "cadence_qspi.h"
+
+#define CQSPI_REG_POLL_US (1) /* 1us */
+#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) \
+ ((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_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)
+
+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 = readl(src_ptr);
+ remaining -= CQSPI_FIFO_WIDTH;
+ } else {
+ /* dangling bytes */
+ temp = 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) {
+ writel(*src_ptr, dest_ptr);
+ remaining -= sizeof(unsigned int);
+ } else {
+ /* dangling bytes */
+ memcpy(&temp, src_ptr, remaining);
+ 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(struct cadence_spi_platdata *plat,
+ const void *src_addr, unsigned int num_bytes)
+{
+ const void *reg_base = plat->regbase;
+ void *dest_addr = plat->ahbbase;
+ 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 = plat->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 = readl(reg_base + CQSPI_REG_CONFIG);
+ reg |= CQSPI_REG_CONFIG_ENABLE_MASK;
+ writel(reg, reg_base + CQSPI_REG_CONFIG);
+ return;
+}
+
+void cadence_qspi_apb_controller_disable(void *reg_base)
+{
+ unsigned int reg;
+ reg = readl(reg_base + CQSPI_REG_CONFIG);
+ reg &= ~CQSPI_REG_CONFIG_ENABLE_MASK;
+ 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 = 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);
+
+ 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 = 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 {
+ if (ref_clk_hz % sclk_hz)
+ /* ensure generated SCLK doesn't exceed user
+ specified sclk_hz */
+ 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;
+ 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 = 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);
+
+ 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 = 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;
+ 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);
+ writel(reg, reg_base + CQSPI_REG_DELAY);
+
+ cadence_qspi_apb_controller_enable(reg_base);
+ return;
+}
+
+void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *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);
+
+ /* Disable all interrupts */
+ writel(0, plat->regbase + CQSPI_REG_IRQMASK);
+
+ cadence_qspi_apb_controller_enable(plat->regbase);
+ 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. */
+ writel(reg, reg_base + CQSPI_REG_CMDCTRL);
+ /* Start execute */
+ reg |= CQSPI_REG_CMDCTRL_EXECUTE_MASK;
+ writel(reg, reg_base + CQSPI_REG_CMDCTRL);
+
+ while (retry--) {
+ reg = 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 = 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, 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);
+
+ 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);
+ 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_indirect_read_setup(struct cadence_spi_platdata *plat,
+ 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 */
+ writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
+ plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
+
+ /* Configure SRAM partition for read. */
+ writel(CQSPI_REG_SRAM_PARTITION_RD, plat->regbase +
+ 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);
+ writel(addr_value, plat->regbase + 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)
+ writel(0x0, plat->regbase + CQSPI_REG_MODE_BIT);
+#else
+ writel(0xFF, plat->regbase + 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;
+ }
+
+ 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 |= (addr_bytes - 1);
+ writel(reg, plat->regbase + CQSPI_REG_SIZE);
+ return 0;
+}
+
+int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
+ unsigned int rxlen, u8 *rxbuf)
+{
+ unsigned int reg;
+
+ writel(rxlen, plat->regbase + CQSPI_REG_INDIRECTRDBYTES);
+
+ /* Start the indirect read transfer */
+ writel(CQSPI_REG_INDIRECTRD_START_MASK,
+ plat->regbase + CQSPI_REG_INDIRECTRD);
+
+ if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
+ (const void *)plat->ahbbase, rxlen))
+ goto failrd;
+
+ /* Check flash indirect controller */
+ reg = readl(plat->regbase + CQSPI_REG_INDIRECTRD);
+ if (!(reg & CQSPI_REG_INDIRECTRD_DONE_MASK)) {
+ reg = readl(plat->regbase + CQSPI_REG_INDIRECTRD);
+ printf("QSPI: indirect completion status error with reg 0x%08x\n",
+ reg);
+ goto failrd;
+ }
+
+ /* Clear indirect completion status */
+ writel(CQSPI_REG_INDIRECTRD_DONE_MASK,
+ plat->regbase + CQSPI_REG_INDIRECTRD);
+ return 0;
+
+failrd:
+ /* Cancel the indirect read */
+ writel(CQSPI_REG_INDIRECTRD_CANCEL_MASK,
+ plat->regbase + CQSPI_REG_INDIRECTRD);
+ return -1;
+}
+
+/* Opcode + Address (3/4 bytes) */
+int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
+ 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 */
+ writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
+ plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
+
+ writel(CQSPI_REG_SRAM_PARTITION_WR,
+ plat->regbase + CQSPI_REG_SRAMPARTITION);
+
+ /* Configure the opcode */
+ reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB;
+ writel(reg, plat->regbase + CQSPI_REG_WR_INSTR);
+
+ /* Setup write address. */
+ reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
+ writel(reg, plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
+
+ reg = readl(plat->regbase + CQSPI_REG_SIZE);
+ reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
+ reg |= (addr_bytes - 1);
+ writel(reg, plat->regbase + CQSPI_REG_SIZE);
+ return 0;
+}
+
+int cadence_qspi_apb_indirect_write_execute(struct cadence_spi_platdata *plat,
+ unsigned int txlen, const u8 *txbuf)
+{
+ unsigned int reg = 0;
+ unsigned int retry;
+
+ /* Configure the indirect read transfer bytes */
+ writel(txlen, plat->regbase + CQSPI_REG_INDIRECTWRBYTES);
+
+ /* Start the indirect write transfer */
+ writel(CQSPI_REG_INDIRECTWR_START_MASK,
+ plat->regbase + CQSPI_REG_INDIRECTWR);
+
+ if (qpsi_write_sram_fifo_push(plat, (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(plat->regbase);
+ 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 = readl(plat->regbase + 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 */
+ writel(CQSPI_REG_INDIRECTWR_DONE_MASK,
+ plat->regbase + CQSPI_REG_INDIRECTWR);
+ return 0;
+
+failwr:
+ /* Cancel the indirect write */
+ writel(CQSPI_REG_INDIRECTWR_CANCEL_MASK,
+ plat->regbase + 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 = 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;
+ 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);
+}
--- /dev/null
+/*
+ * Designware master SPI core controller driver
+ *
+ * Copyright (C) 2014 Stefan Roese <sr@denx.de>
+ *
+ * Very loosely based on the Linux driver:
+ * drivers/spi/spi-dw.c, which is:
+ * Copyright (c) 2009, Intel Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <malloc.h>
+#include <spi.h>
+#include <fdtdec.h>
+#include <linux/compat.h>
+#include <asm/io.h>
+#include <asm/arch/clock_manager.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Register offsets */
+#define DW_SPI_CTRL0 0x00
+#define DW_SPI_CTRL1 0x04
+#define DW_SPI_SSIENR 0x08
+#define DW_SPI_MWCR 0x0c
+#define DW_SPI_SER 0x10
+#define DW_SPI_BAUDR 0x14
+#define DW_SPI_TXFLTR 0x18
+#define DW_SPI_RXFLTR 0x1c
+#define DW_SPI_TXFLR 0x20
+#define DW_SPI_RXFLR 0x24
+#define DW_SPI_SR 0x28
+#define DW_SPI_IMR 0x2c
+#define DW_SPI_ISR 0x30
+#define DW_SPI_RISR 0x34
+#define DW_SPI_TXOICR 0x38
+#define DW_SPI_RXOICR 0x3c
+#define DW_SPI_RXUICR 0x40
+#define DW_SPI_MSTICR 0x44
+#define DW_SPI_ICR 0x48
+#define DW_SPI_DMACR 0x4c
+#define DW_SPI_DMATDLR 0x50
+#define DW_SPI_DMARDLR 0x54
+#define DW_SPI_IDR 0x58
+#define DW_SPI_VERSION 0x5c
+#define DW_SPI_DR 0x60
+
+/* Bit fields in CTRLR0 */
+#define SPI_DFS_OFFSET 0
+
+#define SPI_FRF_OFFSET 4
+#define SPI_FRF_SPI 0x0
+#define SPI_FRF_SSP 0x1
+#define SPI_FRF_MICROWIRE 0x2
+#define SPI_FRF_RESV 0x3
+
+#define SPI_MODE_OFFSET 6
+#define SPI_SCPH_OFFSET 6
+#define SPI_SCOL_OFFSET 7
+
+#define SPI_TMOD_OFFSET 8
+#define SPI_TMOD_MASK (0x3 << SPI_TMOD_OFFSET)
+#define SPI_TMOD_TR 0x0 /* xmit & recv */
+#define SPI_TMOD_TO 0x1 /* xmit only */
+#define SPI_TMOD_RO 0x2 /* recv only */
+#define SPI_TMOD_EPROMREAD 0x3 /* eeprom read mode */
+
+#define SPI_SLVOE_OFFSET 10
+#define SPI_SRL_OFFSET 11
+#define SPI_CFS_OFFSET 12
+
+/* Bit fields in SR, 7 bits */
+#define SR_MASK 0x7f /* cover 7 bits */
+#define SR_BUSY (1 << 0)
+#define SR_TF_NOT_FULL (1 << 1)
+#define SR_TF_EMPT (1 << 2)
+#define SR_RF_NOT_EMPT (1 << 3)
+#define SR_RF_FULL (1 << 4)
+#define SR_TX_ERR (1 << 5)
+#define SR_DCOL (1 << 6)
+
+#define RX_TIMEOUT 1000 /* timeout in ms */
+
+struct dw_spi_platdata {
+ s32 frequency; /* Default clock frequency, -1 for none */
+ void __iomem *regs;
+};
+
+struct dw_spi_priv {
+ void __iomem *regs;
+ unsigned int freq; /* Default frequency */
+ unsigned int mode;
+
+ int bits_per_word;
+ u8 cs; /* chip select pin */
+ u8 tmode; /* TR/TO/RO/EEPROM */
+ u8 type; /* SPI/SSP/MicroWire */
+ int len;
+
+ u32 fifo_len; /* depth of the FIFO buffer */
+ void *tx;
+ void *tx_end;
+ void *rx;
+ void *rx_end;
+};
+
+static inline u32 dw_readl(struct dw_spi_priv *priv, u32 offset)
+{
+ return __raw_readl(priv->regs + offset);
+}
+
+static inline void dw_writel(struct dw_spi_priv *priv, u32 offset, u32 val)
+{
+ __raw_writel(val, priv->regs + offset);
+}
+
+static inline u16 dw_readw(struct dw_spi_priv *priv, u32 offset)
+{
+ return __raw_readw(priv->regs + offset);
+}
+
+static inline void dw_writew(struct dw_spi_priv *priv, u32 offset, u16 val)
+{
+ __raw_writew(val, priv->regs + offset);
+}
+
+static int dw_spi_ofdata_to_platdata(struct udevice *bus)
+{
+ struct dw_spi_platdata *plat = bus->platdata;
+ const void *blob = gd->fdt_blob;
+ int node = bus->of_offset;
+
+ plat->regs = (struct dw_spi *)fdtdec_get_addr(blob, node, "reg");
+
+ /* Use 500KHz as a suitable default */
+ plat->frequency = fdtdec_get_int(blob, node, "spi-max-frequency",
+ 500000);
+ debug("%s: regs=%p max-frequency=%d\n", __func__, plat->regs,
+ plat->frequency);
+
+ return 0;
+}
+
+static inline void spi_enable_chip(struct dw_spi_priv *priv, int enable)
+{
+ dw_writel(priv, DW_SPI_SSIENR, (enable ? 1 : 0));
+}
+
+/* Restart the controller, disable all interrupts, clean rx fifo */
+static void spi_hw_init(struct dw_spi_priv *priv)
+{
+ spi_enable_chip(priv, 0);
+ dw_writel(priv, DW_SPI_IMR, 0xff);
+ spi_enable_chip(priv, 1);
+
+ /*
+ * Try to detect the FIFO depth if not set by interface driver,
+ * the depth could be from 2 to 256 from HW spec
+ */
+ if (!priv->fifo_len) {
+ u32 fifo;
+
+ for (fifo = 2; fifo <= 257; fifo++) {
+ dw_writew(priv, DW_SPI_TXFLTR, fifo);
+ if (fifo != dw_readw(priv, DW_SPI_TXFLTR))
+ break;
+ }
+
+ priv->fifo_len = (fifo == 257) ? 0 : fifo;
+ dw_writew(priv, DW_SPI_TXFLTR, 0);
+ }
+ debug("%s: fifo_len=%d\n", __func__, priv->fifo_len);
+}
+
+static int dw_spi_probe(struct udevice *bus)
+{
+ struct dw_spi_platdata *plat = dev_get_platdata(bus);
+ struct dw_spi_priv *priv = dev_get_priv(bus);
+
+ priv->regs = plat->regs;
+ priv->freq = plat->frequency;
+
+ /* Currently only bits_per_word == 8 supported */
+ priv->bits_per_word = 8;
+
+ priv->tmode = 0; /* Tx & Rx */
+
+ /* Basic HW init */
+ spi_hw_init(priv);
+
+ return 0;
+}
+
+/* Return the max entries we can fill into tx fifo */
+static inline u32 tx_max(struct dw_spi_priv *priv)
+{
+ u32 tx_left, tx_room, rxtx_gap;
+
+ tx_left = (priv->tx_end - priv->tx) / (priv->bits_per_word >> 3);
+ tx_room = priv->fifo_len - dw_readw(priv, DW_SPI_TXFLR);
+
+ /*
+ * Another concern is about the tx/rx mismatch, we
+ * thought about using (priv->fifo_len - rxflr - txflr) as
+ * one maximum value for tx, but it doesn't cover the
+ * data which is out of tx/rx fifo and inside the
+ * shift registers. So a control from sw point of
+ * view is taken.
+ */
+ rxtx_gap = ((priv->rx_end - priv->rx) - (priv->tx_end - priv->tx)) /
+ (priv->bits_per_word >> 3);
+
+ return min3(tx_left, tx_room, (u32)(priv->fifo_len - rxtx_gap));
+}
+
+/* Return the max entries we should read out of rx fifo */
+static inline u32 rx_max(struct dw_spi_priv *priv)
+{
+ u32 rx_left = (priv->rx_end - priv->rx) / (priv->bits_per_word >> 3);
+
+ return min_t(u32, rx_left, dw_readw(priv, DW_SPI_RXFLR));
+}
+
+static void dw_writer(struct dw_spi_priv *priv)
+{
+ u32 max = tx_max(priv);
+ u16 txw = 0;
+
+ while (max--) {
+ /* Set the tx word if the transfer's original "tx" is not null */
+ if (priv->tx_end - priv->len) {
+ if (priv->bits_per_word == 8)
+ txw = *(u8 *)(priv->tx);
+ else
+ txw = *(u16 *)(priv->tx);
+ }
+ dw_writew(priv, DW_SPI_DR, txw);
+ debug("%s: tx=0x%02x\n", __func__, txw);
+ priv->tx += priv->bits_per_word >> 3;
+ }
+}
+
+static int dw_reader(struct dw_spi_priv *priv)
+{
+ unsigned start = get_timer(0);
+ u32 max;
+ u16 rxw;
+
+ /* Wait for rx data to be ready */
+ while (rx_max(priv) == 0) {
+ if (get_timer(start) > RX_TIMEOUT)
+ return -ETIMEDOUT;
+ }
+
+ max = rx_max(priv);
+
+ while (max--) {
+ rxw = dw_readw(priv, DW_SPI_DR);
+ debug("%s: rx=0x%02x\n", __func__, rxw);
+
+ /*
+ * Care about rx only if the transfer's original "rx" is
+ * not null
+ */
+ if (priv->rx_end - priv->len) {
+ if (priv->bits_per_word == 8)
+ *(u8 *)(priv->rx) = rxw;
+ else
+ *(u16 *)(priv->rx) = rxw;
+ }
+ priv->rx += priv->bits_per_word >> 3;
+ }
+
+ return 0;
+}
+
+static int poll_transfer(struct dw_spi_priv *priv)
+{
+ int ret;
+
+ do {
+ dw_writer(priv);
+ ret = dw_reader(priv);
+ if (ret < 0)
+ return ret;
+ } while (priv->rx_end > priv->rx);
+
+ return 0;
+}
+
+static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct udevice *bus = dev->parent;
+ struct dw_spi_priv *priv = dev_get_priv(bus);
+ const u8 *tx = dout;
+ u8 *rx = din;
+ int ret = 0;
+ u32 cr0 = 0;
+ u32 cs;
+
+ /* spi core configured to do 8 bit transfers */
+ if (bitlen % 8) {
+ debug("Non byte aligned SPI transfer.\n");
+ return -1;
+ }
+
+ cr0 = (priv->bits_per_word - 1) | (priv->type << SPI_FRF_OFFSET) |
+ (priv->mode << SPI_MODE_OFFSET) |
+ (priv->tmode << SPI_TMOD_OFFSET);
+
+ if (rx && tx)
+ priv->tmode = SPI_TMOD_TR;
+ else if (rx)
+ priv->tmode = SPI_TMOD_RO;
+ else
+ priv->tmode = SPI_TMOD_TO;
+
+ cr0 &= ~SPI_TMOD_MASK;
+ cr0 |= (priv->tmode << SPI_TMOD_OFFSET);
+
+ priv->len = bitlen >> 3;
+ debug("%s: rx=%p tx=%p len=%d [bytes]\n", __func__, rx, tx, priv->len);
+
+ priv->tx = (void *)tx;
+ priv->tx_end = priv->tx + priv->len;
+ priv->rx = rx;
+ priv->rx_end = priv->rx + priv->len;
+
+ /* Disable controller before writing control registers */
+ spi_enable_chip(priv, 0);
+
+ debug("%s: cr0=%08x\n", __func__, cr0);
+ /* Reprogram cr0 only if changed */
+ if (dw_readw(priv, DW_SPI_CTRL0) != cr0)
+ dw_writew(priv, DW_SPI_CTRL0, cr0);
+
+ /*
+ * Configure the desired SS (slave select 0...3) in the controller
+ * The DW SPI controller will activate and deactivate this CS
+ * automatically. So no cs_activate() etc is needed in this driver.
+ */
+ cs = spi_chip_select(dev);
+ dw_writel(priv, DW_SPI_SER, 1 << cs);
+
+ /* Enable controller after writing control registers */
+ spi_enable_chip(priv, 1);
+
+ /* Start transfer in a polling loop */
+ ret = poll_transfer(priv);
+
+ return ret;
+}
+
+static int dw_spi_set_speed(struct udevice *bus, uint speed)
+{
+ struct dw_spi_platdata *plat = bus->platdata;
+ struct dw_spi_priv *priv = dev_get_priv(bus);
+ u16 clk_div;
+
+ if (speed > plat->frequency)
+ speed = plat->frequency;
+
+ /* Disable controller before writing control registers */
+ spi_enable_chip(priv, 0);
+
+ /* clk_div doesn't support odd number */
+ clk_div = cm_get_spi_controller_clk_hz() / speed;
+ clk_div = (clk_div + 1) & 0xfffe;
+ dw_writel(priv, DW_SPI_BAUDR, clk_div);
+
+ /* Enable controller after writing control registers */
+ spi_enable_chip(priv, 1);
+
+ priv->freq = speed;
+ debug("%s: regs=%p speed=%d clk_div=%d\n", __func__, priv->regs,
+ priv->freq, clk_div);
+
+ return 0;
+}
+
+static int dw_spi_set_mode(struct udevice *bus, uint mode)
+{
+ struct dw_spi_priv *priv = dev_get_priv(bus);
+
+ /*
+ * Can't set mode yet. Since this depends on if rx, tx, or
+ * rx & tx is requested. So we have to defer this to the
+ * real transfer function.
+ */
+ priv->mode = mode;
+ debug("%s: regs=%p, mode=%d\n", __func__, priv->regs, priv->mode);
+
+ return 0;
+}
+
+static const struct dm_spi_ops dw_spi_ops = {
+ .xfer = dw_spi_xfer,
+ .set_speed = dw_spi_set_speed,
+ .set_mode = dw_spi_set_mode,
+ /*
+ * cs_info is not needed, since we require all chip selects to be
+ * in the device tree explicitly
+ */
+};
+
+static const struct udevice_id dw_spi_ids[] = {
+ { .compatible = "snps,dw-spi-mmio" },
+ { }
+};
+
+U_BOOT_DRIVER(dw_spi) = {
+ .name = "dw_spi",
+ .id = UCLASS_SPI,
+ .of_match = dw_spi_ids,
+ .ops = &dw_spi_ops,
+ .ofdata_to_platdata = dw_spi_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct dw_spi_platdata),
+ .priv_auto_alloc_size = sizeof(struct dw_spi_priv),
+ .per_child_auto_alloc_size = sizeof(struct spi_slave),
+ .probe = dw_spi_probe,
+};
#define CONFIG_SYS_MMC_MAX_BLK_COUNT 256 /* FIXME -- SPL only? */
#endif
- /*
+/*
* I2C support
*/
#define CONFIG_SYS_I2C
#endif
#define CONFIG_CMD_I2C
+/*
+ * QSPI support
+ */
+#ifdef CONFIG_OF_CONTROL /* QSPI is controlled via DT */
+#define CONFIG_CMD_DM
+#define CONFIG_DM
+#define CONFIG_DM_SPI
+#define CONFIG_DM_SPI_FLASH
+#define CONFIG_CADENCE_QSPI
+/* Enable multiple SPI NOR flash manufacturers */
+#define CONFIG_SPI_FLASH /* SPI flash subsystem */
+#define CONFIG_SPI_FLASH_STMICRO /* Micron/Numonyx flash */
+#define CONFIG_SPI_FLASH_SPANSION /* Spansion flash */
+#define CONFIG_SPI_FLASH_MTD
+/* QSPI reference clock */
+#ifndef __ASSEMBLY__
+unsigned int cm_get_qspi_controller_clk_hz(void);
+#define CONFIG_CQSPI_REF_CLK cm_get_qspi_controller_clk_hz()
+#endif
+#define CONFIG_CQSPI_DECODER 0
+#define CONFIG_CMD_SF
+#endif
+
+#ifdef CONFIG_OF_CONTROL /* DW SPI is controlled via DT */
+#define CONFIG_CMD_DM
+#define CONFIG_DM
+#define CONFIG_DM_SPI
+#define CONFIG_DESIGNWARE_SPI
+#define CONFIG_CMD_SPI
+#endif
+
/*
* Serial Driver
*/
/*
* Copyright (c) 2014, Steffen Trumtrar <s.trumtrar@pengutronix.de>
*
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * SPDX-License-Identifier: GPL-2.0
*/
#ifndef _DT_BINDINGS_RESET_ALTR_RST_MGR_H
projects / karo-tx-uboot.git / commitdiff