[U-Boot] [PATCH 18/18] sf: add driver for Atmel QSPI controller
Cyrille Pitchen
cyrille.pitchen at atmel.com
Tue Mar 15 19:12:40 CET 2016
This patch adds support of the Atmel QSPI controller.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen at atmel.com>
---
drivers/mtd/spi/Makefile | 1 +
drivers/mtd/spi/atmel_qspi_flash.c | 432 +++++++++++++++++++++++++++++++++++++
drivers/spi/Kconfig | 9 +
drivers/spi/Makefile | 1 +
drivers/spi/atmel_qspi.c | 150 +++++++++++++
drivers/spi/atmel_qspi.h | 145 +++++++++++++
6 files changed, 738 insertions(+)
create mode 100644 drivers/mtd/spi/atmel_qspi_flash.c
create mode 100644 drivers/spi/atmel_qspi.c
create mode 100644 drivers/spi/atmel_qspi.h
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 90266d619ddf..207e1d556f3f 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_SPI_FLASH_STMICRO) += sf_micron.o
obj-$(CONFIG_SPI_FLASH_DATAFLASH) += sf_dataflash.o
obj-$(CONFIG_SPI_FLASH_MTD) += sf_mtd.o
obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o
+obj-$(CONFIG_ATMEL_QSPI) += atmel_qspi_flash.o
diff --git a/drivers/mtd/spi/atmel_qspi_flash.c b/drivers/mtd/spi/atmel_qspi_flash.c
new file mode 100644
index 000000000000..97f85ae2e30c
--- /dev/null
+++ b/drivers/mtd/spi/atmel_qspi_flash.c
@@ -0,0 +1,432 @@
+#include <common.h>
+#include <errno.h>
+#include <spi.h>
+#include <spi_flash.h>
+
+#include "sf_internal.h"
+#include "../../spi/atmel_qspi.h"
+
+struct atmel_qspi_command {
+ union {
+ struct {
+ unsigned int instruction:1;
+ unsigned int address:3;
+ unsigned int mode:1;
+ unsigned int dummy:1;
+ unsigned int data:1;
+ unsigned int reserved:25;
+ } bits;
+ unsigned int word;
+ } enable;
+ unsigned char instruction;
+ unsigned char mode;
+ unsigned char num_mode_cycles;
+ unsigned char num_dummy_cycles;
+ unsigned int address;
+
+ size_t buf_len;
+ const void *tx_buf;
+ void *rx_buf;
+
+ enum spi_flash_protocol protocol;
+ u32 ifr_tfrtype;
+};
+
+
+static void atmel_qspi_memcpy_fromio(void *dst, unsigned long src, size_t len)
+{
+ u8 *d = (u8 *)dst;
+
+ while (len--) {
+ *d++ = readb(src);
+ src++;
+ }
+}
+
+static void atmel_qspi_memcpy_toio(unsigned long dst, const void *src,
+ size_t len)
+{
+ const u8 *s = (const u8 *)src;
+
+ while (len--) {
+ writeb(*s, dst);
+ dst++;
+ s++;
+ }
+}
+
+static int atmel_qpsi_set_ifr_width(enum spi_flash_protocol proto, u32 *ifr)
+{
+ u32 ifr_width;
+
+ switch (proto) {
+ case SPI_FLASH_PROTO_1_1_1:
+ ifr_width = QSPI_IFR_WIDTH_SINGLE_BIT_SPI;
+ break;
+
+ case SPI_FLASH_PROTO_1_1_2:
+ ifr_width = QSPI_IFR_WIDTH_DUAL_OUTPUT;
+ break;
+
+ case SPI_FLASH_PROTO_1_2_2:
+ ifr_width = QSPI_IFR_WIDTH_DUAL_IO;
+ break;
+
+ case SPI_FLASH_PROTO_2_2_2:
+ ifr_width = QSPI_IFR_WIDTH_DUAL_CMD;
+ break;
+
+ case SPI_FLASH_PROTO_1_1_4:
+ ifr_width = QSPI_IFR_WIDTH_QUAD_OUTPUT;
+ break;
+
+ case SPI_FLASH_PROTO_1_4_4:
+ ifr_width = QSPI_IFR_WIDTH_QUAD_IO;
+ break;
+
+ case SPI_FLASH_PROTO_4_4_4:
+ ifr_width = QSPI_IFR_WIDTH_QUAD_CMD;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ *ifr = (*ifr & ~QSPI_IFR_WIDTH) | ifr_width;
+ return 0;
+}
+
+static int atmel_qspi_send_command(struct atmel_qspi_priv *aq,
+ const struct atmel_qspi_command *cmd)
+{
+ unsigned int iar, icr, ifr;
+ unsigned int offset;
+ unsigned int imr, sr;
+ unsigned long memaddr;
+ int err;
+
+ iar = 0;
+ icr = 0;
+ ifr = cmd->ifr_tfrtype;
+
+ err = atmel_qpsi_set_ifr_width(cmd->protocol, &ifr);
+ if (err)
+ return err;
+
+ /* Compute instruction parameters */
+ if (cmd->enable.bits.instruction) {
+ icr |= QSPI_ICR_INST_(cmd->instruction);
+ ifr |= QSPI_IFR_INSTEN;
+ }
+
+ /* Compute address parameters. */
+ switch (cmd->enable.bits.address) {
+ case 4:
+ ifr |= QSPI_IFR_ADDRL_32_BIT;
+ //break; /* fall through the 24bit (3 byte) address case */
+ case 3:
+ iar = (cmd->enable.bits.data) ? 0 : cmd->address;
+ ifr |= QSPI_IFR_ADDREN;
+ offset = cmd->address;
+ break;
+ case 0:
+ offset = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Compute option parameters. */
+ if (cmd->enable.bits.mode && cmd->num_mode_cycles) {
+ unsigned int mode_cycle_bits, mode_bits;
+
+ icr |= QSPI_ICR_OPT_(cmd->mode);
+ ifr |= QSPI_IFR_OPTEN;
+
+ switch (ifr & QSPI_IFR_WIDTH) {
+ case QSPI_IFR_WIDTH_SINGLE_BIT_SPI:
+ case QSPI_IFR_WIDTH_DUAL_OUTPUT:
+ case QSPI_IFR_WIDTH_QUAD_OUTPUT:
+ mode_cycle_bits = 1;
+ break;
+ case QSPI_IFR_WIDTH_DUAL_IO:
+ case QSPI_IFR_WIDTH_DUAL_CMD:
+ mode_cycle_bits = 2;
+ break;
+ case QSPI_IFR_WIDTH_QUAD_IO:
+ case QSPI_IFR_WIDTH_QUAD_CMD:
+ mode_cycle_bits = 4;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mode_bits = cmd->num_mode_cycles * mode_cycle_bits;
+ switch (mode_bits) {
+ case 1:
+ ifr |= QSPI_IFR_OPTL_1BIT;
+ break;
+
+ case 2:
+ ifr |= QSPI_IFR_OPTL_2BIT;
+ break;
+
+ case 4:
+ ifr |= QSPI_IFR_OPTL_4BIT;
+ break;
+
+ case 8:
+ ifr |= QSPI_IFR_OPTL_8BIT;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ }
+
+ /* Set the number of dummy cycles. */
+ if (cmd->enable.bits.dummy)
+ ifr |= QSPI_IFR_NBDUM_(cmd->num_dummy_cycles);
+
+ /* Set data enable. */
+ if (cmd->enable.bits.data) {
+ ifr |= QSPI_IFR_DATAEN;
+
+ /* Special case for Continuous Read Mode. */
+ if (!cmd->tx_buf && !cmd->rx_buf)
+ ifr |= QSPI_IFR_CRM;
+ }
+
+ /* Clear pending interrupts. */
+ (void)qspi_readl(aq, QSPI_SR);
+
+ /* Set QSPI Instruction Frame registers. */
+ qspi_writel(aq, QSPI_IAR, iar);
+ qspi_writel(aq, QSPI_ICR, icr);
+ qspi_writel(aq, QSPI_IFR, ifr);
+
+ /* Skip to the final steps if there is no data. */
+ if (!cmd->enable.bits.data)
+ goto no_data;
+
+ /* Dummy read of QSPI_IFR to synchronize APB and AHB accesses. */
+ (void)qspi_readl(aq, QSPI_IFR);
+
+ /* Stop here for Continuous Read. */
+ memaddr = (unsigned long)(aq->membase + offset);
+ if (cmd->tx_buf)
+ /* Write data. */
+ atmel_qspi_memcpy_toio(memaddr, cmd->tx_buf, cmd->buf_len);
+ else if (cmd->rx_buf)
+ /* Read data. */
+ atmel_qspi_memcpy_fromio(cmd->rx_buf, memaddr, cmd->buf_len);
+ else
+ /* Stop here for continuous read */
+ return 0;
+
+ /* Release the chip-select. */
+ qspi_writel(aq, QSPI_CR, QSPI_CR_LASTXFER);
+
+no_data:
+ /* Poll INSTruction End and Chip Select Rise flags. */
+ imr = (QSPI_SR_INSTRE | QSPI_SR_CSR);
+ sr = 0;
+ while (sr != (QSPI_SR_INSTRE | QSPI_SR_CSR))
+ sr |= qspi_readl(aq, QSPI_SR) & imr;
+
+ return 0;
+}
+
+static int atmel_qspi_read_reg(struct udevice *dev, u8 opcode,
+ size_t len, void *buf)
+{
+ struct spi_flash *flash = dev_get_uclass_priv(dev);
+ struct atmel_qspi_priv *aq = dev_get_priv(dev->parent);
+ struct atmel_qspi_command cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.enable.bits.instruction = 1;
+ cmd.enable.bits.data = 1;
+ cmd.instruction = opcode;
+ cmd.rx_buf = buf;
+ cmd.buf_len = len;
+ cmd.protocol = flash->reg_proto;
+ cmd.ifr_tfrtype = QSPI_IFR_TFRTYPE_READ;
+ return atmel_qspi_send_command(aq, &cmd);
+}
+
+static int atmel_qspi_write_reg(struct udevice *dev, u8 opcode,
+ size_t len, const void *buf)
+{
+ struct spi_flash *flash = dev_get_uclass_priv(dev);
+ struct atmel_qspi_priv *aq = dev_get_priv(dev->parent);
+ struct atmel_qspi_command cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.enable.bits.instruction = 1;
+ cmd.enable.bits.data = (buf && len);
+ cmd.instruction = opcode;
+ cmd.tx_buf = buf;
+ cmd.buf_len = len;
+ cmd.protocol = flash->reg_proto;
+ cmd.ifr_tfrtype = QSPI_IFR_TFRTYPE_WRITE;
+ return atmel_qspi_send_command(aq, &cmd);
+}
+
+static int atmel_qspi_read_impl(struct spi_flash *flash, u32 offset,
+ size_t len, void *buf)
+{
+ struct atmel_qspi_priv *aq = dev_get_priv(flash->dev->parent);
+ struct atmel_qspi_command cmd;
+ u8 lshift;
+
+ switch (SPI_FLASH_PROTO_ADR_FROM_PROTO(flash->read_proto)) {
+ case 1:
+ lshift = 3;
+ break;
+
+ case 2:
+ lshift = 2;
+ break;
+
+ case 4:
+ lshift = 1;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.enable.bits.instruction = 1;
+ cmd.enable.bits.address = flash->addr_width;
+ cmd.enable.bits.mode = 0;
+ cmd.enable.bits.dummy = (flash->dummy_byte > 0);
+ cmd.enable.bits.data = 1;
+ cmd.instruction = flash->read_cmd;
+ cmd.address = offset;
+ cmd.num_dummy_cycles = flash->dummy_byte << lshift;
+ cmd.rx_buf = buf;
+ cmd.buf_len = len;
+ cmd.protocol = flash->read_proto;
+ cmd.ifr_tfrtype = QSPI_IFR_TFRTYPE_READ_MEMORY;
+ return atmel_qspi_send_command(aq, &cmd);
+}
+
+static int atmel_qspi_read(struct udevice *dev, u32 offset,
+ size_t len, void *buf)
+{
+ struct spi_flash *flash = dev_get_uclass_priv(dev);
+
+ return spi_flash_read_alg(flash, offset, len, buf,
+ atmel_qspi_read_impl);
+}
+
+static int atmel_qspi_write_impl(struct spi_flash *flash, u32 offset,
+ size_t len, const void *buf)
+{
+ struct atmel_qspi_priv *aq = dev_get_priv(flash->dev->parent);
+ struct atmel_qspi_command cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.enable.bits.instruction = 1;
+ cmd.enable.bits.address = flash->addr_width;
+ cmd.enable.bits.data = 1;
+ cmd.instruction = flash->write_cmd;
+ cmd.address = offset;
+ cmd.tx_buf = buf;
+ cmd.buf_len = len;
+ cmd.protocol = flash->write_proto;
+ cmd.ifr_tfrtype = QSPI_IFR_TFRTYPE_WRITE_MEMORY;
+ return atmel_qspi_send_command(aq, &cmd);
+}
+
+static int atmel_qspi_write(struct udevice *dev, u32 offset,
+ size_t len, const void *buf)
+{
+ struct spi_flash *flash = dev_get_uclass_priv(dev);
+
+ return spi_flash_write_alg(flash, offset, len, buf,
+ atmel_qspi_write_impl);
+}
+
+static int atmel_qspi_erase_impl(struct spi_flash *flash, u32 offset)
+{
+ struct atmel_qspi_priv *aq = dev_get_priv(flash->dev->parent);
+ struct atmel_qspi_command cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.enable.bits.instruction = 1;
+ cmd.enable.bits.address = flash->addr_width;
+ cmd.instruction = flash->erase_cmd;
+ cmd.address = offset;
+ cmd.protocol = flash->erase_proto;
+ cmd.ifr_tfrtype = QSPI_IFR_TFRTYPE_WRITE;
+ return atmel_qspi_send_command(aq, &cmd);
+}
+
+static int atmel_qspi_erase(struct udevice *dev, u32 offset, size_t len)
+{
+ struct spi_flash *flash = dev_get_uclass_priv(dev);
+
+ return spi_flash_erase_alg(flash, offset, len,
+ atmel_qspi_erase_impl);
+}
+
+static const struct dm_spi_flash_ops atmel_qspi_flash_ops = {
+ .read_reg = atmel_qspi_read_reg,
+ .write_reg = atmel_qspi_write_reg,
+ .read = atmel_qspi_read,
+ .write = atmel_qspi_write,
+ .erase = atmel_qspi_erase,
+};
+
+static int atmel_qspi_flash_probe(struct udevice *dev)
+{
+ struct spi_flash *flash = dev_get_uclass_priv(dev);
+ struct spi_slave *slave = dev_get_parent_priv(dev);
+ int ret;
+
+ flash->dev = dev;
+ flash->spi = slave;
+
+ /* Claim spi bus */
+ ret = spi_claim_bus(slave);
+ if (ret) {
+ debug("SF: Failed to claim SPI bus: %d\n", ret);
+ return ret;
+ }
+
+ /* The Quad SPI controller supports all Dual & Quad I/O protocols */
+ slave->mode |= (SPI_TX_QUAD | SPI_TX_DUAL);
+ ret = spi_flash_scan(flash, RD_FCMD);
+ if (ret) {
+ ret = -EINVAL;
+ goto release;
+ }
+
+#ifdef CONFIG_SPI_FLASH_MTD
+ ret = spi_flash_mtd_register(flash);
+#endif
+
+release:
+ spi_release_bus(slave);
+ return ret;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id atmel_qspi_flash_ids[] = {
+ { .compatible = "atmel,sama5d2-qspi-flash" },
+ { }
+};
+#endif
+
+U_BOOT_DRIVER(atmel_qspi_flash) = {
+ .name = "atmel_qspi_flash",
+ .id = UCLASS_SPI_FLASH,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = atmel_qspi_flash_ids,
+#endif
+ .probe = atmel_qspi_flash_probe,
+ .ops = &atmel_qspi_flash_ops,
+};
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index f0258f84afeb..d478c5d953c6 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -23,6 +23,15 @@ config ALTERA_SPI
IP core. Please find details on the "Embedded Peripherals IP
User Guide" of Altera.
+config ATMEL_QSPI
+ bool "Atmel QSPI driver"
+ depends on ARCH_AT91
+ select SPI_FLASH
+ select DM_SPI_FLASH
+ help
+ Enable the Ateml Quad-SPI (QSPI) driver. This driver can only be
+ used to access SPI NOR flashes.
+
config CADENCE_QSPI
bool "Cadence QSPI driver"
help
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 3eca7456d6a6..eb3bd95f5ee7 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -18,6 +18,7 @@ endif
obj-$(CONFIG_ALTERA_SPI) += altera_spi.o
obj-$(CONFIG_ARMADA100_SPI) += armada100_spi.o
obj-$(CONFIG_ATMEL_DATAFLASH_SPI) += atmel_dataflash_spi.o
+obj-$(CONFIG_ATMEL_QSPI) += atmel_qspi.o
obj-$(CONFIG_ATMEL_SPI) += atmel_spi.o
obj-$(CONFIG_BFIN_SPI) += bfin_spi.o
obj-$(CONFIG_BFIN_SPI6XX) += bfin_spi6xx.o
diff --git a/drivers/spi/atmel_qspi.c b/drivers/spi/atmel_qspi.c
new file mode 100644
index 000000000000..b8e280553d99
--- /dev/null
+++ b/drivers/spi/atmel_qspi.c
@@ -0,0 +1,150 @@
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <spi.h>
+#include <asm/io.h>
+#include <mach/clk.h>
+
+#include "atmel_qspi.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+
+static int atmel_qspi_xfer(struct udevice *dev, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ /* This controller can only be used with SPI NOR flashes. */
+ return -EINVAL;
+}
+
+static int atmel_qspi_set_speed(struct udevice *bus, uint hz)
+{
+ struct atmel_qspi_priv *aq = dev_get_priv(bus);
+ unsigned long src_rate;
+ u32 scr, scbr, mask, new_value;
+
+ /* Compute the QSPI baudrate */
+ src_rate = get_qspi_clk_rate(aq->dev_id);
+ scbr = DIV_ROUND_UP(src_rate, hz);
+ if (scbr > 0)
+ scbr--;
+
+ new_value = QSPI_SCR_SCBR_(scbr);
+ mask = QSPI_SCR_SCBR;
+
+ scr = qspi_readl(aq, QSPI_SCR);
+ if ((scr & mask) == new_value)
+ return 0;
+
+ scr = (scr & ~mask) | new_value;
+ qspi_writel(aq, QSPI_SCR, scr);
+
+ return 0;
+}
+
+static int atmel_qspi_set_mode(struct udevice *bus, uint mode)
+{
+ struct atmel_qspi_priv *aq = dev_get_priv(bus);
+ u32 scr, mask, new_value;
+
+ new_value = (QSPI_SCR_CPOL_((mode & SPI_CPOL) != 0) |
+ QSPI_SCR_CPHA_((mode & SPI_CPHA) != 0));
+ mask = (QSPI_SCR_CPOL | QSPI_SCR_CPHA);
+
+ scr = qspi_readl(aq, QSPI_SCR);
+ if ((scr & mask) == new_value)
+ return 0;
+
+ scr = (scr & ~mask) | new_value;
+ qspi_writel(aq, QSPI_SCR, scr);
+
+ return 0;
+}
+
+static const struct dm_spi_ops atmel_qspi_ops = {
+ .xfer = atmel_qspi_xfer,
+ .set_speed = atmel_qspi_set_speed,
+ .set_mode = atmel_qspi_set_mode,
+};
+
+static int atmel_qspi_probe(struct udevice *dev)
+{
+ const struct atmel_qspi_platdata *plat = dev_get_platdata(dev);
+ struct atmel_qspi_priv *aq = dev_get_priv(dev);
+ u32 mr;
+
+ aq->regbase = plat->regbase;
+ aq->membase = plat->membase;
+ aq->dev_id = plat->dev_id;
+
+ /* Reset the QSPI controler */
+ qspi_writel(aq, QSPI_CR, QSPI_CR_SWRST);
+
+ /* Set the QSPI controller in Serial Memory Mode */
+ mr = (QSPI_MR_NBBITS_8_BIT |
+ QSPI_MR_SMM_MEMORY |
+ QSPI_MR_CSMODE_LASTXFER);
+ qspi_writel(aq, QSPI_MR, mr);
+
+ /* Enable the QSPI controller */
+ qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIEN);
+
+ return 0;
+}
+
+static int atmel_qspi_remove(struct udevice *dev)
+{
+ struct atmel_qspi_priv *aq = dev_get_priv(dev);
+
+ /* Disable the QSPI controller */
+ qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIDIS);
+
+ return 0;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int atmel_qspi_ofdata_to_platdata(struct udevice *dev)
+{
+ struct atmel_qspi_platdata *plat = dev_get_platdata(dev);
+ const void *blob = gd->fdt_blob;
+ int node = dev->of_offset;
+ u32 data[4];
+ int ret, seq;
+
+ 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->membase = (void *)data[2];
+
+ ret = fdtdec_get_alias_seq(blob, "spi", node, &seq);
+ if (ret) {
+ printf("Error: Can't get device ID (ret=%d)!\n", ret);
+ return -ENODEV;
+ }
+ plat->dev_id = (unsigned int)seq;
+
+ return 0;
+}
+
+static const struct udevice_id atmel_qspi_ids[] = {
+ { .compatible = "atmel,sama5d2-qspi" },
+ { }
+};
+#endif
+
+U_BOOT_DRIVER(atmel_qspi) = {
+ .name = "atmel_qspi",
+ .id = UCLASS_SPI,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = atmel_qspi_ids,
+ .ofdata_to_platdata = atmel_qspi_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct atmel_qspi_platdata),
+#endif
+ .priv_auto_alloc_size = sizeof(struct atmel_qspi_priv),
+ .ops = &atmel_qspi_ops,
+ .probe = atmel_qspi_probe,
+ .remove = atmel_qspi_remove,
+};
diff --git a/drivers/spi/atmel_qspi.h b/drivers/spi/atmel_qspi.h
new file mode 100644
index 000000000000..2b221dd44335
--- /dev/null
+++ b/drivers/spi/atmel_qspi.h
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2016
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ATMEL_QSPI_H__
+#define __ATMEL_QSPI_H__
+
+/*
+ * Register Definitions
+ */
+#define QSPI_CR 0x00 /* Control Register */
+#define QSPI_MR 0x04 /* Mode Register */
+#define QSPI_RDR 0x08 /* Receive Data Register */
+#define QSPI_TDR 0x0c /* Transmit Data Register */
+#define QSPI_SR 0x10 /* Status Register */
+#define QSPI_IER 0x14 /* Interrupt Enable Register */
+#define QSPI_IDR 0x18 /* Interrupt Disable Register */
+#define QSPI_IMR 0x1c /* Interrupt Mask Register */
+#define QSPI_SCR 0x20 /* Serial Clock Register */
+#define QSPI_IAR 0x30 /* Instruction Address Register */
+#define QSPI_ICR 0x34 /* Instruction Code Register */
+#define QSPI_IFR 0x38 /* Instruction Frame Register */
+/* 0x3c Reserved */
+#define QSPI_SMR 0x40 /* Scrambling Mode Register */
+#define QSPI_SKR 0x44 /* Scrambling Key Register */
+/* 0x48 ~ 0xe0 */
+#define QSPI_WPMR 0xe4 /* Write Protection Mode Register */
+#define QSPI_WPSR 0xe8 /* Write Protection Status Register */
+/* 0xec ~ 0xf8 Reserved */
+/* 0xfc Reserved */
+
+/*
+ * Register Field Definitions
+ */
+/* QSPI_CR */
+#define QSPI_CR_QSPIEN (0x1 << 0) /* QSPI Enable */
+#define QSPI_CR_QSPIDIS (0x1 << 1) /* QSPI Disable */
+#define QSPI_CR_SWRST (0x1 << 7) /* QSPI Software Reset */
+#define QSPI_CR_LASTXFER (0x1 << 24) /* Last Transfer */
+
+/* QSPI_MR */
+#define QSPI_MR_SMM (0x1 << 0) /* Serial Memort Mode */
+#define QSPI_MR_SMM_SPI (0x0 << 0)
+#define QSPI_MR_SMM_MEMORY (0x1 << 0)
+#define QSPI_MR_LLB (0x1 << 1) /* Local Localback Enable */
+#define QSPI_MR_LLB_DISABLED (0x0 << 1)
+#define QSPI_MR_LLB_ENABLED (0x1 << 1)
+#define QSPI_MR_WDRBT (0x1 << 2) /* Wait Data Read Before Transfer */
+#define QSPI_MR_WDRBT_DISABLED (0x0 << 2)
+#define QSPI_MR_WDRBT_ENABLED (0x1 << 2)
+#define QSPI_MR_SMRM (0x1 << 3) /* Serial Memory Register Mode */
+#define QSPI_MR_SMRM_AHB (0x0 << 3)
+#define QSPI_MR_SMRM_APB (0x1 << 3)
+#define QSPI_MR_CSMODE (0x3 << 4) /* Chip Select Mode */
+#define QSPI_MR_CSMODE_NOT_RELOADED (0x0 << 4)
+#define QSPI_MR_CSMODE_LASTXFER (0x1 << 4)
+#define QSPI_MR_CSMODE_SYSTEMATICALLY (0x2 << 4)
+#define QSPI_MR_NBBITS (0xf << 8) /* Number of Bits Per Transfer */
+#define QSPI_MR_NBBITS_8_BIT (0x0 << 8)
+#define QSPI_MR_NBBITS_16_BIT (0x8 << 8)
+#define QSPI_MR_DLYBCT (0xff << 16) /* Delay Between Consecutive Transfers */
+#define QSPI_MR_DLYCS (0xff << 24) /* Minimum Inactive QCS Delay */
+
+/* QSPI_SR */
+#define QSPI_SR_RDRF (0x1 << 0) /* Receive Data Register Full */
+#define QSPI_SR_TDRE (0x1 << 1) /* Transmit Data Register Empty */
+#define QSPI_SR_TXEMPTY (0x1 << 2) /* Transmission Registers Empty */
+#define QSPI_SR_OVRES (0x1 << 3) /* Overrun Error Status */
+#define QSPI_SR_CSR (0x1 << 8) /* Chip Select Rise */
+#define QSPI_SR_CSS (0x1 << 9) /* Chip Select Status */
+#define QSPI_SR_INSTRE (0x1 << 10) /* Instruction End Status */
+#define QSPI_SR_QSPIENS (0x1 << 24) /* QSPI Enable Status */
+
+/* QSPI_SCR */
+#define QSPI_SCR_CPOL (0x1 << 0) /* Clock Polarity */
+#define QSPI_SCR_CPOL_(x) ((x) << 0)
+#define QSPI_SCR_CPHA (0x1 << 1) /* Clock Phase */
+#define QSPI_SCR_CPHA_(x) ((x) << 1)
+#define QSPI_SCR_SCBR (0xff << 8) /* Serial Clock Baud Rate */
+#define QSPI_SCR_SCBR_(x) ((x) << 8)
+#define QSPI_SCR_DLYBS_(x) ((x) << 16) /* Delay Before QSCK */
+
+/* QSPI_ICR */
+#define QSPI_ICR_INST_(x) ((x) << 0) /* Instruction Code */
+#define QSPI_ICR_OPT_(x) ((x) << 16) /* Option Code */
+
+/* QSPI_IFR */
+#define QSPI_IFR_WIDTH (0x7 << 0) /* Width of Instruction Code, Address, Option Code and Data */
+#define QSPI_IFR_WIDTH_SINGLE_BIT_SPI (0x0 << 0)
+#define QSPI_IFR_WIDTH_DUAL_OUTPUT (0x1 << 0)
+#define QSPI_IFR_WIDTH_QUAD_OUTPUT (0x2 << 0)
+#define QSPI_IFR_WIDTH_DUAL_IO (0x3 << 0)
+#define QSPI_IFR_WIDTH_QUAD_IO (0x4 << 0)
+#define QSPI_IFR_WIDTH_DUAL_CMD (0x5 << 0)
+#define QSPI_IFR_WIDTH_QUAD_CMD (0x6 << 0)
+#define QSPI_IFR_WIDTH_(x) (((x) << 0) & QSPI_IFR_WIDTH)
+#define QSPI_IFR_INSTEN (0x1 << 4) /* Instruction Enable*/
+#define QSPI_IFR_ADDREN (0x1 << 5) /* Address Enable*/
+#define QSPI_IFR_OPTEN (0x1 << 6) /* Option Enable*/
+#define QSPI_IFR_DATAEN (0x1 << 7) /* Data Enable*/
+#define QSPI_IFR_OPTL (0x3 << 8) /* Option Code Length */
+#define QSPI_IFR_OPTL_1BIT (0x0 << 8)
+#define QSPI_IFR_OPTL_2BIT (0x1 << 8)
+#define QSPI_IFR_OPTL_4BIT (0x2 << 8)
+#define QSPI_IFR_OPTL_8BIT (0x3 << 8)
+#define QSPI_IFR_ADDRL (0x1 << 10) /* Address Length */
+#define QSPI_IFR_ADDRL_24_BIT (0x0 << 10)
+#define QSPI_IFR_ADDRL_32_BIT (0x1 << 10)
+#define QSPI_IFR_TFRTYPE (0x3 << 12) /* Data Transfer Type */
+#define QSPI_IFR_TFRTYPE_READ (0x0 << 12)
+#define QSPI_IFR_TFRTYPE_READ_MEMORY (0x1 << 12)
+#define QSPI_IFR_TFRTYPE_WRITE (0x2 << 12)
+#define QSPI_IFR_TFRTYPE_WRITE_MEMORY (0x3 << 12)
+#define QSPI_IFR_TFRTYPE_(x) (((x) << 12) & QSPI_IFR_TFRTYPE)
+#define QSPI_IFR_CRM (0x1 << 14) /* Continuous Read Mode */
+#define QSPI_IFR_NBDUM_(x) ((x) << 16) /* Number Of Dummy Cycles */
+
+
+struct atmel_qspi_platdata {
+ unsigned int dev_id;
+ void *regbase;
+ void *membase;
+};
+
+struct atmel_qspi_priv {
+ unsigned int dev_id;
+ void *regbase;
+ void *membase;
+};
+
+#include <asm/io.h>
+
+static inline u32 qspi_readl(struct atmel_qspi_priv *aq, u32 reg)
+{
+ return readl(aq->regbase + reg);
+}
+
+static inline void qspi_writel(struct atmel_qspi_priv *aq, u32 reg, u32 value)
+{
+ writel(value, aq->regbase + reg);
+}
+
+#endif /* __ATMEL_QSPI_H__ */
--
1.8.2.2
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