[PATCH v9] driver: spi: add bcm iproc qspi support

IPROC qspi driver supports both BSPI and MSPI modes.

Signed-off-by: Rayagonda Kokatanur rayagonda.kokatanur@broadcom.com Signed-off-by: Bharat Gooty bharat.gooty@broadcom.com Acked-by: Rayagonda Kokatanur rayagonda.kokatanur@broadcom.com

Signed-off-by: Roman Bacik roman.bacik@broadcom.com ---

Changes in v9: - merge bspi_set_4byte_mode to bspi_set_flex_mode - simplify bspi_set_flex_mode using data from spi_mem_op - rename mode_4byte to bspi_4byte - use BIT(x) istead of 1<<x

Changes in v8: - add 4-byte address support

Changes in v7: - remove hardcorded IPROC_BSPI_READ_DUMMY_CYCLES - remove unnecessary flags from bspi_read - fix BSPI supported operation condition

Changes in v6: - remove priv->mode_4byte - remove IPROC_BSPI_READ_SUPPORTED

Changes in v5: - add binding document - implement spi-mem interface for bspi mode - use op->cmd.opcode for BSPI_CMD_AND_MODE_BYTE_REG - move iproc_qspi.c to spi

Changes in v4: - move iproc_qspi.c from spi to mtd/spi - remove iproc_qspi.h - rename IPROC_QSPI to SPI_FLASH_IPROC

Changes in v3: - fix warning by including linux/delay.h - change ofdata_to_platdata to of_to_plat - change priv_auto_alloc_size to priv_auto

Changes in v2: - remove include spi-nor.h - define and use named BITs for writing register values - remove bspi_set_4byte_mode() method

.../spi/spi-iproc-qspi.txt | 29 + drivers/spi/Kconfig | 6 + drivers/spi/Makefile | 1 + drivers/spi/iproc_qspi.c | 657 ++++++++++++++++++ 4 files changed, 693 insertions(+) create mode 100644 doc/device-tree-bindings/spi/spi-iproc-qspi.txt create mode 100644 drivers/spi/iproc_qspi.c

diff --git a/doc/device-tree-bindings/spi/spi-iproc-qspi.txt b/doc/device-tree-bindings/spi/spi-iproc-qspi.txt new file mode 100644 index 000000000000..fb9f1c2ae2da --- /dev/null +++ b/doc/device-tree-bindings/spi/spi-iproc-qspi.txt @@ -0,0 +1,29 @@ +Broadcom Iproc QSPI controller Device Tree Bindings +--------------------------------------------------- + +Required properties: +- compatible: should be "brcm,iproc-qspi". +- reg: Base address and size of the controllers memory area. +- reg-names: "bspi", "bspi_raf", "mspi". +- #address-cells: <1>, as required by generic SPI binding. +- #size-cells: <0>, also as required by generic SPI binding. + +Example: + qspi: spi@370000 { + compatible = "brcm,iproc-qspi"; + reg = <0x00370000 0x100>, + <0x00370100 0x100>, + <0x00370200 0x200>; + reg-names = "bspi", "bspi_raf", "mspi"; + #address-cells = <1>; + #size-cells = <0>; + spi_nor_flash: spi_flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + spi-max-frequency = <12500000>; + spi-cpol; + spi-cpha; + spi-tx-bus-width = <1>; + spi-rx-bus-width = <4>; + }; + }; diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index d07e9a28af82..faebc212753e 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -178,6 +178,12 @@ config ICH_SPI access the SPI NOR flash on platforms embedding this Intel ICH IP core.

+config IPROC_QSPI + bool "Broadcom iProc QSPI Flash Controller driver" + help + Enable Broadcom iProc QSPI Flash Controller driver. + This driver can be used to access the SPI NOR flash. + config KIRKWOOD_SPI bool "Marvell Kirkwood SPI Driver" help diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index d2f24bccefd3..869763187062 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_FSL_DSPI) += fsl_dspi.o obj-$(CONFIG_FSL_ESPI) += fsl_espi.o obj-$(CONFIG_SYNQUACER_SPI) += spi-synquacer.o obj-$(CONFIG_ICH_SPI) += ich.o +obj-$(CONFIG_IPROC_QSPI) += iproc_qspi.o obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o obj-$(CONFIG_MESON_SPIFC) += meson_spifc.o obj-$(CONFIG_MPC8XX_SPI) += mpc8xx_spi.o diff --git a/drivers/spi/iproc_qspi.c b/drivers/spi/iproc_qspi.c new file mode 100644 index 000000000000..d3c3a8c7f028 --- /dev/null +++ b/drivers/spi/iproc_qspi.c @@ -0,0 +1,657 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2020-2021 Broadcom + */ + +#include <common.h> +#include <dm.h> +#include <spi.h> +#include <spi-mem.h> +#include <asm/io.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/log2.h> + +/* 175MHz */ +#define QSPI_AXI_CLK 175000000 +#define QSPI_WAIT_TIMEOUT_MS 200U +#define DWORD_ALIGNED(a) (!(((ulong)(a)) & 3)) + +/* Chip attributes */ +#define SPBR_MIN 8U +#define SPBR_MAX 255U +#define NUM_CDRAM 16U + +#define CDRAM_PCS0 2 +#define CDRAM_CONT BIT(7) +#define CDRAM_BITS_EN BIT(6) +#define CDRAM_QUAD_MODE BIT(8) +#define CDRAM_RBIT_INPUT BIT(10) +#define MSPI_SPE BIT(6) +#define MSPI_CONT_AFTER_CMD BIT(7) + +/* Register fields */ +#define MSPI_SPCR0_MSB_BITS_8 0x00000020 +#define BSPI_RAF_CONTROL_START_MASK 0x00000001 +#define BSPI_RAF_STATUS_SESSION_BUSY_MASK 0x00000001 +#define BSPI_RAF_STATUS_FIFO_EMPTY_MASK 0x00000002 +#define BSPI_STRAP_OVERRIDE_DATA_QUAD_SHIFT 3 +#define BSPI_STRAP_OVERRIDE_DATA_DUAL_SHIFT 1 +#define BSPI_STRAP_OVERRIDE_SHIFT 0 +#define BSPI_BPC_DATA_SHIFT 0 +#define BSPI_BPC_MODE_SHIFT 8 +#define BSPI_BPC_ADDR_SHIFT 16 +#define BSPI_BPC_CMD_SHIFT 24 +#define BSPI_BPP_ADDR_SHIFT 16 + +/* MSPI registers */ +#define MSPI_SPCR0_LSB_REG 0x000 +#define MSPI_SPCR0_MSB_REG 0x004 +#define MSPI_SPCR1_LSB_REG 0x008 +#define MSPI_SPCR1_MSB_REG 0x00c +#define MSPI_NEWQP_REG 0x010 +#define MSPI_ENDQP_REG 0x014 +#define MSPI_SPCR2_REG 0x018 +#define MSPI_STATUS_REG 0x020 +#define MSPI_CPTQP_REG 0x024 +#define MSPI_TXRAM_REG 0x040 +#define MSPI_RXRAM_REG 0x0c0 +#define MSPI_CDRAM_REG 0x140 +#define MSPI_WRITE_LOCK_REG 0x180 +#define MSPI_DISABLE_FLUSH_GEN_REG 0x184 + +/* BSPI registers */ +#define BSPI_REVISION_ID_REG 0x000 +#define BSPI_SCRATCH_REG 0x004 +#define BSPI_MAST_N_BOOT_CTRL_REG 0x008 +#define BSPI_BUSY_STATUS_REG 0x00c +#define BSPI_INTR_STATUS_REG 0x010 +#define BSPI_B0_STATUS_REG 0x014 +#define BSPI_B0_CTRL_REG 0x018 +#define BSPI_B1_STATUS_REG 0x01c +#define BSPI_B1_CTRL_REG 0x020 +#define BSPI_STRAP_OVERRIDE_CTRL_REG 0x024 +#define BSPI_FLEX_MODE_ENABLE_REG 0x028 +#define BSPI_BITS_PER_CYCLE_REG 0x02C +#define BSPI_BITS_PER_PHASE_REG 0x030 +#define BSPI_CMD_AND_MODE_BYTE_REG 0x034 +#define BSPI_FLASH_UPPER_ADDR_BYTE_REG 0x038 +#define BSPI_XOR_VALUE_REG 0x03C +#define BSPI_XOR_ENABLE_REG 0x040 +#define BSPI_PIO_MODE_ENABLE_REG 0x044 +#define BSPI_PIO_IODIR_REG 0x048 +#define BSPI_PIO_DATA_REG 0x04C + +/* RAF registers */ +#define BSPI_RAF_START_ADDRESS_REG 0x00 +#define BSPI_RAF_NUM_WORDS_REG 0x04 +#define BSPI_RAF_CTRL_REG 0x08 +#define BSPI_RAF_FULLNESS_REG 0x0C +#define BSPI_RAF_WATERMARK_REG 0x10 +#define BSPI_RAF_STATUS_REG 0x14 +#define BSPI_RAF_READ_DATA_REG 0x18 +#define BSPI_RAF_WORD_CNT_REG 0x1C +#define BSPI_RAF_CURR_ADDR_REG 0x20 + +#define XFER_DUAL BIT(30) +#define XFER_QUAD BIT(31) + +#define FLASH_BIT BIT(0) +#define MAST_N_BOOT_BIT BIT(0) +#define WRITE_LOCK_BIT BIT(0) + +/* state */ +enum bcm_qspi_state { + QSPI_STATE_DISABLED, + QSPI_STATE_MSPI, + QSPI_STATE_BSPI +}; + +/** + * struct bcmspi_priv - qspi private structure + * + * @max_hz: device transfer speed + * @spi_mode: spi mode (SPI_... flags) + * @frequency: spi max frequency + * @state: device state (MSPI/BSPI) + * @bspi_addr: bspi read address + * @bspi_4byte: bspi 4 byte address mode + * @mspi_16bit: mspi transfer mode + * @mspi: mspi registers block address + * @bspi: bspi registers block address + * @bspi_raf: bspi raf registers block address + */ +struct bcmspi_priv { + uint max_hz; + uint spi_mode; + s32 frequency; + enum bcm_qspi_state state; + u32 bspi_addr; + bool bspi_4byte; + int mspi_16bit; + void __iomem *mspi; + void __iomem *bspi; + void __iomem *bspi_raf; +}; + +/* BSPI mode */ + +static void bspi_flush_prefetch_buffers(struct bcmspi_priv *priv) +{ + writel(0, priv->bspi + BSPI_B0_CTRL_REG); + writel(0, priv->bspi + BSPI_B1_CTRL_REG); + writel(FLASH_BIT, priv->bspi + BSPI_B0_CTRL_REG); + writel(FLASH_BIT, priv->bspi + BSPI_B1_CTRL_REG); +} + +static int bspi_enable(struct bcmspi_priv *priv) +{ + if (priv->state == QSPI_STATE_BSPI) + return 0; + + /* Disable write lock */ + writel(0, priv->mspi + MSPI_WRITE_LOCK_REG); + /* Flush prefetch buffers */ + bspi_flush_prefetch_buffers(priv); + /* Switch to BSPI */ + writel(0, priv->bspi + BSPI_MAST_N_BOOT_CTRL_REG); + /* Update state */ + priv->state = QSPI_STATE_BSPI; + + return 0; +} + +static int bspi_disable(struct bcmspi_priv *priv) +{ + if (priv->state == QSPI_STATE_MSPI) + return 0; + + if ((readl(priv->bspi + BSPI_MAST_N_BOOT_CTRL_REG) & 1) == 0) { + ulong start = get_timer(0); + + while (get_timer(start) < + QSPI_WAIT_TIMEOUT_MS * CONFIG_SYS_HZ / 1000) { + if ((readl(priv->bspi + BSPI_BUSY_STATUS_REG) & 1) + == 0) { + /* Switch to MSPI */ + writel(MAST_N_BOOT_BIT, priv->bspi + + BSPI_MAST_N_BOOT_CTRL_REG); + udelay(1); + break; + } + udelay(1); + } + if ((readl(priv->bspi + BSPI_MAST_N_BOOT_CTRL_REG) & 1) != 1) + return -1; + } + + /* Enable write lock */ + writel(WRITE_LOCK_BIT, priv->mspi + MSPI_WRITE_LOCK_REG); + + /* Update state */ + priv->state = QSPI_STATE_MSPI; + + return 0; +} + +static void bspi_read_via_raf(struct bcmspi_priv *priv, u8 *rx, uint bytes) +{ + u32 status; + uint words; + int aligned; + + /* Flush data from the previous session (unlikely) */ + for (;;) { + status = readl(priv->bspi_raf + BSPI_RAF_STATUS_REG); + if (!(status & BSPI_RAF_STATUS_FIFO_EMPTY_MASK)) { + readl(priv->bspi_raf + BSPI_RAF_READ_DATA_REG); + continue; + } + if (!(status & BSPI_RAF_STATUS_SESSION_BUSY_MASK)) + break; + } + + /* Transfer is in words */ + words = (bytes + 3) / 4; + + /* Setup hardware */ + if (priv->bspi_4byte) { + u32 val = priv->bspi_addr & 0xFF000000; + + if (val != readl(priv->bspi + BSPI_FLASH_UPPER_ADDR_BYTE_REG)) { + writel(val, priv->bspi + BSPI_FLASH_UPPER_ADDR_BYTE_REG); + bspi_flush_prefetch_buffers(priv); + } + } + + writel(priv->bspi_addr & 0x00FFFFFF, + priv->bspi_raf + BSPI_RAF_START_ADDRESS_REG); + writel(words, priv->bspi_raf + BSPI_RAF_NUM_WORDS_REG); + writel(0, priv->bspi_raf + BSPI_RAF_WATERMARK_REG); + + /* Start reading */ + writel(BSPI_RAF_CONTROL_START_MASK, priv->bspi_raf + BSPI_RAF_CTRL_REG); + aligned = DWORD_ALIGNED(rx); + while (bytes) { + status = readl(priv->bspi_raf + BSPI_RAF_STATUS_REG); + if (!(status & BSPI_RAF_STATUS_FIFO_EMPTY_MASK)) { + /* + * RAF is LE only, + * convert data to host endianness + */ + u32 data = le32_to_cpu(readl(priv->bspi_raf + + BSPI_RAF_READ_DATA_REG)); + + /* Check if we can use the whole word */ + if (aligned && bytes >= 4) { + *(u32 *)rx = data; + rx += 4; + bytes -= 4; + } else { + uint chunk = min(bytes, 4U); + + /* Read out bytes one by one */ + while (chunk) { + *rx++ = (u8)data; + data >>= 8; + chunk--; + bytes--; + } + } + + continue; + } + if (!(status & BSPI_RAF_STATUS_SESSION_BUSY_MASK)) { + /* FIFO is empty and the session is done */ + break; + } + } +} + +static int bspi_read(struct bcmspi_priv *priv, const struct spi_mem_op *op) +{ + u8 *rx = op->data.buf.in; + uint bytes = op->data.nbytes; + uint trans; + + priv->bspi_addr = op->addr.val; + + /* Transfer data */ + while (bytes > 0 && rx) { + /* Special handing since RAF cannot go across 16MB boundary */ + trans = bytes; + /* + * Divide into multiple transfers if it goes + * across the 16MB boundary + */ + if (priv->bspi_4byte && + (priv->bspi_addr >> 24) != + ((priv->bspi_addr + bytes) >> 24)) + trans = 0x01000000 - (priv->bspi_addr & 0x00FFFFFF); + + bspi_read_via_raf(priv, rx, trans); + priv->bspi_addr += trans; + rx += trans; + bytes -= trans; + } + + bspi_flush_prefetch_buffers(priv); + return 0; +} + +static void bspi_set_flex_mode(struct bcmspi_priv *priv, const struct spi_mem_op *op) +{ + int bpp = (op->dummy.nbytes * 8) / op->dummy.buswidth; + int opcode = op->cmd.opcode; + int bpc = ilog2(op->data.buswidth) << BSPI_BPC_DATA_SHIFT | + ilog2(op->addr.buswidth) << BSPI_BPC_ADDR_SHIFT | + ilog2(op->cmd.buswidth) << BSPI_BPC_CMD_SHIFT; + + /* Disable flex mode first */ + writel(0, priv->bspi + BSPI_FLEX_MODE_ENABLE_REG); + + /* Configure single, dual or quad mode */ + writel(bpc, priv->bspi + BSPI_BITS_PER_CYCLE_REG); + + /* Opcode */ + writel(opcode, priv->bspi + BSPI_CMD_AND_MODE_BYTE_REG); + + /* Count of dummy cycles */ + writel(bpp, priv->bspi + BSPI_BITS_PER_PHASE_REG); + + /* Enable 32-bit address */ + if (priv->bspi_4byte) { + setbits_le32(priv->bspi + BSPI_BITS_PER_PHASE_REG, BIT(BSPI_BPP_ADDR_SHIFT)); + } else { + clrbits_le32(priv->bspi + BSPI_BITS_PER_PHASE_REG, BIT(BSPI_BPP_ADDR_SHIFT)); + writel(0, priv->bspi + BSPI_FLASH_UPPER_ADDR_BYTE_REG); + } + + /* Enable flex mode to take effect */ + writel(1, priv->bspi + BSPI_FLEX_MODE_ENABLE_REG); + + /* Flush prefetch buffers since 32MB window BSPI could be used */ + bspi_flush_prefetch_buffers(priv); +} + +static int bspi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op) +{ + struct udevice *bus = slave->dev->parent; + struct bcmspi_priv *priv = dev_get_priv(bus); + int ret = -ENOTSUPP; + + /* BSPI: flash read */ + if (op->data.dir == SPI_MEM_DATA_IN && + op->data.nbytes && op->addr.nbytes) { + priv->bspi_4byte = (op->addr.nbytes > 3); + bspi_set_flex_mode(priv, op); + ret = bspi_read(priv, op); + } + + return ret; +} + +static const struct spi_controller_mem_ops bspi_mem_ops = { + .exec_op = bspi_exec_op, +}; + +/* MSPI mode */ + +static int mspi_exec(struct bcmspi_priv *priv, uint bytes, + const u8 *tx, u8 *rx, ulong flags) +{ + u32 cdr = CDRAM_PCS0; + + if (flags & XFER_QUAD) { + cdr |= CDRAM_QUAD_MODE; + + if (!tx) + cdr |= CDRAM_RBIT_INPUT; + } + + if (bytes & 1) { + /* Use 8-bit queue for odd-bytes transfer */ + if (priv->mspi_16bit) { + setbits_le32(priv->mspi + MSPI_SPCR0_MSB_REG, + MSPI_SPCR0_MSB_BITS_8); + priv->mspi_16bit = 0; + } + } else { + /* Use 16-bit queue for even-bytes transfer */ + if (!priv->mspi_16bit) { + clrbits_le32(priv->mspi + MSPI_SPCR0_MSB_REG, + MSPI_SPCR0_MSB_BITS_8); + priv->mspi_16bit = 1; + } + } + + while (bytes) { + uint chunk; + uint queues; + ulong start; + uint i; + + /* Separate code for 16bit and 8bit transfers for performance */ + if (priv->mspi_16bit) { + /* Determine how many bytes to process this time */ + chunk = min(bytes, NUM_CDRAM * 2); + queues = (chunk + 1) / 2; + bytes -= chunk; + + /* Fill CDRAMs */ + for (i = 0; i < queues; i++) + writel(cdr | CDRAM_CONT | CDRAM_BITS_EN, + priv->mspi + MSPI_CDRAM_REG + (i << 2)); + + /* Fill TXRAMs */ + for (i = 0; i < chunk; i++) + writel(tx ? tx[i] : 0xff, + priv->mspi + MSPI_TXRAM_REG + (i << 2)); + } else { + /* Determine how many bytes to process this time */ + chunk = min(bytes, NUM_CDRAM); + queues = chunk; + bytes -= chunk; + + /* Fill CDRAMs and TXRAMS */ + for (i = 0; i < chunk; i++) { + writel(cdr | CDRAM_CONT, + priv->mspi + MSPI_CDRAM_REG + (i << 2)); + writel(tx ? tx[i] : 0xff, + priv->mspi + MSPI_TXRAM_REG + (i << 3)); + } + } + + /* Setup queue pointers */ + writel(0, priv->mspi + MSPI_NEWQP_REG); + writel(queues - 1, priv->mspi + MSPI_ENDQP_REG); + + /* Deassert CS if requested and it's the last transfer */ + if (bytes == 0 && (flags & SPI_XFER_END)) + clrbits_le32(priv->mspi + MSPI_CDRAM_REG + + ((queues - 1) << 2), CDRAM_CONT); + + /* Kick off */ + writel(0, priv->mspi + MSPI_STATUS_REG); + if (bytes == 0 && (flags & SPI_XFER_END)) + writel(MSPI_SPE, priv->mspi + MSPI_SPCR2_REG); + else + writel(MSPI_SPE | MSPI_CONT_AFTER_CMD, + priv->mspi + MSPI_SPCR2_REG); + + /* Wait for completion */ + start = get_timer(0); + while (get_timer(start) < + QSPI_WAIT_TIMEOUT_MS * CONFIG_SYS_HZ / 1000) { + if (readl(priv->mspi + MSPI_STATUS_REG) & 1) + break; + } + if ((readl(priv->mspi + MSPI_STATUS_REG) & 1) == 0) + return -1; + + /* Read data out */ + if (rx) { + if (priv->mspi_16bit) { + for (i = 0; i < chunk; i++) { + rx[i] = readl(priv->mspi + + MSPI_RXRAM_REG + + (i << 2)) & 0xff; + } + } else { + for (i = 0; i < chunk; i++) { + rx[i] = readl(priv->mspi + + MSPI_RXRAM_REG + + (((i << 1) + 1) << 2)) + & 0xff; + } + } + } + + /* Advance pointers */ + if (tx) + tx += chunk; + if (rx) + rx += chunk; + } + + return 0; +} + +static int mspi_xfer(struct udevice *dev, uint bitlen, + const void *dout, void *din, ulong flags) +{ + struct udevice *bus = dev->parent; + struct bcmspi_priv *priv = dev_get_priv(bus); + uint bytes; + int ret = 0; + + /* we can only transfer multiples of 8 bits */ + if (bitlen % 8) + return -EPROTONOSUPPORT; + + bytes = bitlen / 8; + + if (flags & SPI_XFER_BEGIN) { + /* Switch to MSPI */ + ret = bspi_disable(priv); + if (ret) + return ret; + } + + /* MSPI: Transfer */ + if (bytes) + ret = mspi_exec(priv, bytes, dout, din, flags); + + if (flags & SPI_XFER_END) { + /* Switch back to BSPI */ + ret = bspi_enable(priv); + if (ret) + return ret; + } + + return ret; +} + +/* iProc interface */ + +static int iproc_qspi_set_speed(struct udevice *bus, uint speed) +{ + struct bcmspi_priv *priv = dev_get_priv(bus); + uint spbr; + + priv->max_hz = speed; + + /* MSPI: SCK configuration */ + spbr = (QSPI_AXI_CLK - 1) / (2 * priv->max_hz) + 1; + writel(max(min(spbr, SPBR_MAX), SPBR_MIN), + priv->mspi + MSPI_SPCR0_LSB_REG); + + return 0; +} + +static int iproc_qspi_set_mode(struct udevice *bus, uint mode) +{ + struct bcmspi_priv *priv = dev_get_priv(bus); + + priv->spi_mode = mode; + + /* + * BSPI: override the strap settings. + */ + if (mode & SPI_RX_QUAD) { + setbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_SHIFT)); + setbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_DATA_QUAD_SHIFT)); + clrbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_DATA_DUAL_SHIFT)); + } else if (mode & SPI_RX_DUAL) { + setbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_SHIFT)); + clrbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_DATA_QUAD_SHIFT)); + setbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_DATA_DUAL_SHIFT)); + } else { + clrbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_SHIFT)); + clrbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_DATA_QUAD_SHIFT)); + clrbits_le32(priv->bspi + BSPI_STRAP_OVERRIDE_CTRL_REG, + BIT(BSPI_STRAP_OVERRIDE_DATA_DUAL_SHIFT)); + } + + /* + * MSPI: set master bit and mode. + */ + priv->mspi_16bit = 1; + writel(0x80 | /* Master */ + (priv->spi_mode & 3), /* mode: CPOL / CPHA */ + priv->mspi + MSPI_SPCR0_MSB_REG); + + return 0; +} + +static int iproc_qspi_claim_bus(struct udevice *dev) +{ + /* Nothing to do */ + return 0; +} + +static int iproc_qspi_release_bus(struct udevice *dev) +{ + struct udevice *bus = dev->parent; + struct bcmspi_priv *priv = dev_get_priv(bus); + + /* Make sure no operation is in progress */ + writel(0, priv->mspi + MSPI_SPCR2_REG); + udelay(1); + + return 0; +} + +static int iproc_qspi_of_to_plat(struct udevice *bus) +{ + struct bcmspi_priv *priv = dev_get_priv(bus); + + priv->bspi = (void __iomem *)dev_read_addr_name(bus, "bspi"); + if (IS_ERR(priv->bspi)) { + debug("%s: Failed to get bspi base address\n", __func__); + return PTR_ERR(priv->bspi); + } + + priv->bspi_raf = (void __iomem *)dev_read_addr_name(bus, "bspi_raf"); + if (IS_ERR(priv->bspi_raf)) { + debug("%s: Failed to get bspi_raf base address\n", __func__); + return PTR_ERR(priv->bspi_raf); + } + + priv->mspi = (void __iomem *)dev_read_addr_name(bus, "mspi"); + if (IS_ERR(priv->mspi)) { + debug("%s: Failed to get mspi base address\n", __func__); + return PTR_ERR(priv->mspi); + } + + return 0; +} + +static int iproc_qspi_probe(struct udevice *bus) +{ + struct bcmspi_priv *priv = dev_get_priv(bus); + + /* MSPI: Basic hardware initialization */ + writel(0, priv->mspi + MSPI_SPCR1_LSB_REG); + writel(0, priv->mspi + MSPI_SPCR1_MSB_REG); + writel(0, priv->mspi + MSPI_NEWQP_REG); + writel(0, priv->mspi + MSPI_ENDQP_REG); + writel(0, priv->mspi + MSPI_SPCR2_REG); + + /* Enable BSPI by default */ + bspi_enable(priv); + + return 0; +} + +static const struct dm_spi_ops iproc_qspi_ops = { + .claim_bus = iproc_qspi_claim_bus, + .release_bus = iproc_qspi_release_bus, + .xfer = mspi_xfer, + .set_speed = iproc_qspi_set_speed, + .set_mode = iproc_qspi_set_mode, + .mem_ops = &bspi_mem_ops, +}; + +static const struct udevice_id iproc_qspi_ids[] = { + { .compatible = "brcm,iproc-qspi" }, + { } +}; + +U_BOOT_DRIVER(iproc_qspi) = { + .name = "iproc_qspi", + .id = UCLASS_SPI, + .of_match = iproc_qspi_ids, + .ops = &iproc_qspi_ops, + .of_to_plat = iproc_qspi_of_to_plat, + .priv_auto = sizeof(struct bcmspi_priv), + .probe = iproc_qspi_probe, +};