[U-Boot] [PATCH v3] dm: spi: Convert Freescale DSPI driver to driver model
Haikun Wang
haikun.wang at freescale.com
Tue Mar 24 15:03:58 CET 2015
Move the Freescale DSPI driver over to driver model.
Signed-off-by: Haikun Wang <Haikun.Wang at freescale.com>
---
Changes in v3:
- Coding style cleanup
- Remove cur_slave_plat in structure fsl_dspi_priv
- Change arguments of 'claim_bus' and 'release_bus'
- Remove 'fsl_dspi_child_post_remove'
- Add support NO-DM SPI
- Add 'cpu_dspi_xxx' platform speical configure interface
Changes in v2:
- Coding style cleanup
- Add some comments
- Use structures for I/O access
- Handle timeout case in 'dspi_tx' and 'dspi_rx'
- Move some register configurations from 'set_mode' to 'claim_bus'
- Rename structure fsl_dspi_platdata's member baudrate
- Remove some redundancy code
Changes in v1: None
drivers/spi/Makefile | 1 +
drivers/spi/fsl_dspi.c | 737 +++++++++++++++++++++++++++++++++++++++++++++++++
include/fsl_dspi.h | 150 ++++++++++
3 files changed, 888 insertions(+)
create mode 100644 drivers/spi/fsl_dspi.c
create mode 100644 include/fsl_dspi.h
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index edbd520..9c2b8de 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -49,3 +49,4 @@ obj-$(CONFIG_TI_QSPI) += ti_qspi.o
obj-$(CONFIG_XILINX_SPI) += xilinx_spi.o
obj-$(CONFIG_ZYNQ_SPI) += zynq_spi.o
obj-$(CONFIG_FSL_QSPI) += fsl_qspi.o
+obj-$(CONFIG_FSL_DSPI) += fsl_dspi.o
diff --git a/drivers/spi/fsl_dspi.c b/drivers/spi/fsl_dspi.c
new file mode 100644
index 0000000..6476f91
--- /dev/null
+++ b/drivers/spi/fsl_dspi.c
@@ -0,0 +1,737 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * Copyright (C) 2004-2009, 2015 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew at freescale.com)
+ * Chao Fu (B44548 at freescale.com)
+ * Haikun Wang (B53464 at freescale.com)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <dm.h>
+#include <errno.h>
+#include <common.h>
+#include <spi.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <fdtdec.h>
+#ifndef CONFIG_M68K
+#include <asm/arch/clock.h>
+#endif
+#include <fsl_dspi.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* fsl_dspi_platdata flags */
+#define DSPI_FLAG_REGMAP_ENDIAN_BIG (1 << 0)
+
+/* idle data value */
+#define DSPI_IDLE_VAL 0x0
+
+/* max chipselect signals number */
+#define FSL_DSPI_MAX_CHIPSELECT 6
+
+/* default SCK frequency, unit: HZ */
+#define FSL_DSPI_DEFAULT_SCK_FREQ 10000000
+
+/* tx/rx data wait timeout value, unit: us */
+#define DSPI_TXRX_WAIT_TIMEOUT 1000000
+
+/* CTAR register pre-configure value */
+#define DSPI_CTAR_DEFAULT_VALUE (DSPI_CTAR_TRSZ(7) | \
+ DSPI_CTAR_PCSSCK_1CLK | \
+ DSPI_CTAR_PASC(0) | \
+ DSPI_CTAR_PDT(0) | \
+ DSPI_CTAR_CSSCK(0) | \
+ DSPI_CTAR_ASC(0) | \
+ DSPI_CTAR_DT(0))
+
+/* CTAR register pre-configure mask */
+#define DSPI_CTAR_SET_MODE_MASK (DSPI_CTAR_TRSZ(15) | \
+ DSPI_CTAR_PCSSCK(3) | \
+ DSPI_CTAR_PASC(3) | \
+ DSPI_CTAR_PDT(3) | \
+ DSPI_CTAR_CSSCK(15) | \
+ DSPI_CTAR_ASC(15) | \
+ DSPI_CTAR_DT(15))
+
+/**
+ * struct fsl_dspi_platdata - platform data for Freescale DSPI
+ *
+ * @flags: Flags for DSPI DSPI_FLAG_...
+ * @speed_hz: Default SCK frequency
+ * @num_chipselect: Number of DSPI chipselect signals
+ * @regs_addr: Base address of DSPI registers
+ */
+struct fsl_dspi_platdata {
+ uint flags;
+ uint speed_hz;
+ uint num_chipselect;
+ fdt_addr_t regs_addr;
+};
+
+/**
+ * struct fsl_dspi_priv - private data for Freescale DSPI
+ *
+ * @flags: Flags for DSPI DSPI_FLAG_...
+ * @mode: SPI mode to use for slave device (see SPI mode flags)
+ * @mcr_val: MCR register configure value
+ * @bus_clk: DSPI input clk frequency
+ * @speed_hz: Default SCK frequency
+ * @charbit: How many bits in every transfer
+ * @num_chipselect: Number of DSPI chipselect signals
+ * @ctar_val: CTAR register configure value of per chipselect slave device
+ * @regs: Point to DSPI register structure for I/O access
+ */
+struct fsl_dspi_priv {
+ uint flags;
+ uint mode;
+ uint mcr_val;
+ uint bus_clk;
+ uint speed_hz;
+ uint charbit;
+ uint num_chipselect;
+ uint ctar_val[FSL_DSPI_MAX_CHIPSELECT];
+ struct dspi *regs;
+};
+
+#ifndef CONFIG_DM_SPI
+struct fsl_dspi {
+ struct spi_slave slave;
+ struct fsl_dspi_priv priv;
+};
+#endif
+
+__weak void cpu_dspi_port_conf(void)
+{
+}
+
+__weak int cpu_dspi_claim_bus(uint bus, uint cs)
+{
+ return 0;
+}
+
+__weak void cpu_dspi_release_bus(uint bus, uint cs)
+{
+}
+
+static uint dspi_read32(uint flags, uint *addr)
+{
+ return flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ?
+ in_be32(addr) : in_le32(addr);
+}
+
+static void dspi_write32(uint flags, uint *addr, uint val)
+{
+ flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ?
+ out_be32(addr, val) : out_le32(addr, val);
+}
+
+static void dspi_halt(struct fsl_dspi_priv *priv, u8 halt)
+{
+ uint mcr_val;
+
+ mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
+
+ if (halt)
+ mcr_val |= DSPI_MCR_HALT;
+ else
+ mcr_val &= ~DSPI_MCR_HALT;
+
+ dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
+}
+
+static void fsl_dspi_init_mcr(struct fsl_dspi_priv *priv, uint cfg_val)
+{
+ /* halt DSPI module */
+ dspi_halt(priv, 1);
+
+ dspi_write32(priv->flags, &priv->regs->mcr, cfg_val);
+
+ /* resume module */
+ dspi_halt(priv, 0);
+
+ priv->mcr_val = cfg_val;
+}
+
+static void fsl_dspi_cfg_cs_active_state(struct fsl_dspi_priv *priv,
+ uint cs, uint state)
+{
+ uint mcr_val;
+
+ dspi_halt(priv, 1);
+
+ mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
+ if (state & SPI_CS_HIGH)
+ /* CSx inactive state is low */
+ mcr_val &= ~DSPI_MCR_PCSIS(cs);
+ else
+ /* CSx inactive state is high */
+ mcr_val |= DSPI_MCR_PCSIS(cs);
+ dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
+
+ dspi_halt(priv, 0);
+}
+
+static int fsl_dspi_cfg_ctar_mode(struct fsl_dspi_priv *priv,
+ uint cs, uint mode)
+{
+ uint bus_setup;
+
+ bus_setup = dspi_read32(priv->flags, &priv->regs->ctar[0]);
+
+ bus_setup &= ~DSPI_CTAR_SET_MODE_MASK;
+ bus_setup |= priv->ctar_val[cs];
+ bus_setup &= ~(DSPI_CTAR_CPOL | DSPI_CTAR_CPHA | DSPI_CTAR_LSBFE);
+
+ if (mode & SPI_CPOL)
+ bus_setup |= DSPI_CTAR_CPOL;
+ if (mode & SPI_CPHA)
+ bus_setup |= DSPI_CTAR_CPHA;
+ if (mode & SPI_LSB_FIRST)
+ bus_setup |= DSPI_CTAR_LSBFE;
+
+ dspi_write32(priv->flags, &priv->regs->ctar[0], bus_setup);
+
+ priv->charbit =
+ ((dspi_read32(priv->flags, &priv->regs->ctar[0]) &
+ DSPI_CTAR_TRSZ(15)) == DSPI_CTAR_TRSZ(15)) ? 16 : 8;
+
+ return 0;
+}
+
+static void fsl_dspi_clr_fifo(struct fsl_dspi_priv *priv)
+{
+ uint mcr_val;
+
+ dspi_halt(priv, 1);
+ mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
+ /* flush RX and TX FIFO */
+ mcr_val |= (DSPI_MCR_CTXF | DSPI_MCR_CRXF);
+ dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
+ dspi_halt(priv, 0);
+}
+
+static void dspi_tx(struct fsl_dspi_priv *priv, u32 ctrl, u16 data)
+{
+ int timeout = DSPI_TXRX_WAIT_TIMEOUT;
+
+ /* wait for empty entries in TXFIFO or timeout */
+ while (DSPI_SR_TXCTR(dspi_read32(priv->flags, &priv->regs->sr)) >= 4 &&
+ timeout--)
+ udelay(1);
+
+ if (timeout >= 0)
+ dspi_write32(priv->flags, &priv->regs->tfr, (ctrl | data));
+ else
+ debug("dspi_tx: waiting timeout!\n");
+}
+
+static u16 dspi_rx(struct fsl_dspi_priv *priv)
+{
+ int timeout = DSPI_TXRX_WAIT_TIMEOUT;
+
+ /* wait for valid entries in RXFIFO or timeout */
+ while (DSPI_SR_RXCTR(dspi_read32(priv->flags, &priv->regs->sr)) == 0 &&
+ timeout--)
+ udelay(1);
+
+ if (timeout >= 0)
+ return (u16)DSPI_RFR_RXDATA(
+ dspi_read32(priv->flags, &priv->regs->rfr));
+ else {
+ debug("dspi_rx: waiting timeout!\n");
+ return (u16)(~0);
+ }
+}
+
+static int dspi_xfer(struct fsl_dspi_priv *priv, uint cs, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ u16 *spi_rd16 = NULL, *spi_wr16 = NULL;
+ u8 *spi_rd = NULL, *spi_wr = NULL;
+ static u32 ctrl;
+ uint len = bitlen >> 3;
+
+ if (priv->charbit == 16) {
+ bitlen >>= 1;
+ spi_wr16 = (u16 *)dout;
+ spi_rd16 = (u16 *)din;
+ } else {
+ spi_wr = (u8 *)dout;
+ spi_rd = (u8 *)din;
+ }
+
+ if ((flags & SPI_XFER_BEGIN) == SPI_XFER_BEGIN)
+ ctrl |= DSPI_TFR_CONT;
+
+ ctrl = ctrl & DSPI_TFR_CONT;
+ ctrl = ctrl | DSPI_TFR_CTAS(0) | DSPI_TFR_PCS(cs);
+
+ if (len > 1) {
+ int tmp_len = len - 1;
+ while (tmp_len--) {
+ if (dout != NULL) {
+ if (priv->charbit == 16)
+ dspi_tx(priv, ctrl, *spi_wr16++);
+ else
+ dspi_tx(priv, ctrl, *spi_wr++);
+ dspi_rx(priv);
+ }
+
+ if (din != NULL) {
+ dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
+ if (priv->charbit == 16)
+ *spi_rd16++ = dspi_rx(priv);
+ else
+ *spi_rd++ = dspi_rx(priv);
+ }
+ }
+
+ len = 1; /* remaining byte */
+ }
+
+ if ((flags & SPI_XFER_END) == SPI_XFER_END)
+ ctrl &= ~DSPI_TFR_CONT;
+
+ if (len) {
+ if (dout != NULL) {
+ if (priv->charbit == 16)
+ dspi_tx(priv, ctrl, *spi_wr16);
+ else
+ dspi_tx(priv, ctrl, *spi_wr);
+ dspi_rx(priv);
+ }
+
+ if (din != NULL) {
+ dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
+ if (priv->charbit == 16)
+ *spi_rd16 = dspi_rx(priv);
+ else
+ *spi_rd = dspi_rx(priv);
+ }
+ } else {
+ /* dummy read */
+ dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
+ dspi_rx(priv);
+ }
+
+ return 0;
+}
+
+/**
+ * Calculate the divide value between input clk frequency and expected SCK frequency
+ * Formula: SCK = (clkrate/pbr) x ((1+dbr)/br)
+ * Dbr: use default value 0
+ *
+ * @pbr: return Baud Rate Prescaler value
+ * @br: return Baud Rate Scaler value
+ * @speed_hz: expected SCK frequency
+ * @clkrate: input clk frequency
+ */
+static int fsl_dspi_hz_to_spi_baud(int *pbr, int *br,
+ int speed_hz, uint clkrate)
+{
+ /* Valid baud rate pre-scaler values */
+ int pbr_tbl[4] = {2, 3, 5, 7};
+ int brs[16] = {2, 4, 6, 8,
+ 16, 32, 64, 128,
+ 256, 512, 1024, 2048,
+ 4096, 8192, 16384, 32768};
+ int temp, i = 0, j = 0;
+
+ temp = clkrate / speed_hz;
+
+ for (i = 0; i < ARRAY_SIZE(pbr_tbl); i++)
+ for (j = 0; j < ARRAY_SIZE(brs); j++) {
+ if (pbr_tbl[i] * brs[j] >= temp) {
+ *pbr = i;
+ *br = j;
+ return 0;
+ }
+ }
+
+ debug("Can not find valid baud rate,speed_hz is %d, ", speed_hz);
+ debug("clkrate is %d, we use the max prescaler value.\n", clkrate);
+
+ *pbr = ARRAY_SIZE(pbr_tbl) - 1;
+ *br = ARRAY_SIZE(brs) - 1;
+ return -EINVAL;
+}
+
+static int fsl_dspi_cfg_speed(struct fsl_dspi_priv *priv, uint speed)
+{
+ int ret;
+ uint bus_setup;
+ int best_i, best_j, bus_clk;
+
+ bus_clk = priv->bus_clk;
+
+ debug("DSPI set_speed: expected SCK speed %u, bus_clk %u.\n",
+ speed, bus_clk);
+
+ bus_setup = dspi_read32(priv->flags, &priv->regs->ctar[0]);
+ bus_setup &= ~(DSPI_CTAR_DBR | DSPI_CTAR_PBR(0x3) | DSPI_CTAR_BR(0xf));
+
+ ret = fsl_dspi_hz_to_spi_baud(&best_i, &best_j, speed, bus_clk);
+ if (ret) {
+ speed = priv->speed_hz;
+ debug("DSPI set_speed use default SCK rate %u.\n", speed);
+ fsl_dspi_hz_to_spi_baud(&best_i, &best_j, speed, bus_clk);
+ }
+
+ bus_setup |= (DSPI_CTAR_PBR(best_i) | DSPI_CTAR_BR(best_j));
+ dspi_write32(priv->flags, &priv->regs->ctar[0], bus_setup);
+
+ priv->speed_hz = speed;
+
+ return 0;
+}
+#ifndef CONFIG_DM_SPI
+void spi_init(void)
+{
+ /* Nothing to do */
+}
+
+void spi_init_f(void)
+{
+ /* Nothing to do */
+}
+
+void spi_init_r(void)
+{
+ /* Nothing to do */
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ if (((cs >= 0) && (cs < 8)) && ((bus >= 0) && (bus < 8)))
+ return 1;
+ else
+ return 0;
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct fsl_dspi *dspi;
+ uint mcr_cfg_val;
+
+ dspi = spi_alloc_slave(struct fsl_dspi, bus, cs);
+ if (!dspi)
+ return NULL;
+
+ cpu_dspi_port_conf();
+
+#ifdef CONFIG_SYS_FSL_DSPI_BE
+ dspi->priv.flags |= DSPI_FLAG_REGMAP_ENDIAN_BIG;
+#endif
+
+ dspi->priv.regs = (struct dspi *)MMAP_DSPI;
+
+#ifdef CONFIG_M68K
+ dspi->priv.bus_clk = gd->bus_clk;
+#else
+ dspi->priv.bus_clk = mxc_get_clock(MXC_DSPI_CLK);
+#endif
+ dspi->priv.speed_hz = FSL_DSPI_DEFAULT_SCK_FREQ;
+
+ /* default: all CS signals inactive state is high */
+ mcr_cfg_val = DSPI_MCR_MSTR | DSPI_MCR_PCSIS_MASK |
+ DSPI_MCR_CRXF | DSPI_MCR_CTXF;
+ fsl_dspi_init_mcr(&dspi->priv, mcr_cfg_val);
+
+ for (i = 0; i < FSL_DSPI_MAX_CHIPSELECT; i++)
+ dspi->priv.ctar_val[i] = DSPI_CTAR_DEFAULT_VALUE;
+
+#ifdef CONFIG_SYS_DSPI_CTAR0
+ if (FSL_DSPI_MAX_CHIPSELECT > 0)
+ dspi->priv.ctar_val[0] = CONFIG_SYS_DSPI_CTAR0;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR1
+ if (FSL_DSPI_MAX_CHIPSELECT > 1)
+ dspi->priv.ctar_val[1] = CONFIG_SYS_DSPI_CTAR1;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR2
+ if (FSL_DSPI_MAX_CHIPSELECT > 2)
+ dspi->priv.ctar_val[2] = CONFIG_SYS_DSPI_CTAR2;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR3
+ if (FSL_DSPI_MAX_CHIPSELECT > 3)
+ dspi->priv.ctar_val[3] = CONFIG_SYS_DSPI_CTAR3;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR4
+ if (FSL_DSPI_MAX_CHIPSELECT > 4)
+ dspi->priv.ctar_val[4] = CONFIG_SYS_DSPI_CTAR4;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR5
+ if (FSL_DSPI_MAX_CHIPSELECT > 5)
+ dspi->priv.ctar_val[5] = CONFIG_SYS_DSPI_CTAR5;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR6
+ if (FSL_DSPI_MAX_CHIPSELECT > 6)
+ dspi->priv.ctar_val[6] = CONFIG_SYS_DSPI_CTAR6;
+#endif
+#ifdef CONFIG_SYS_DSPI_CTAR7
+ if (FSL_DSPI_MAX_CHIPSELECT > 7)
+ dspi->priv.ctar_val[7] = CONFIG_SYS_DSPI_CTAR7;
+#endif
+
+ fsl_dspi_cfg_speed(&dspi->priv, max_hz);
+
+ /* configure transfer mode */
+ fsl_dspi_cfg_ctar_mode(&dspi->priv, cs, mode);
+
+ /* configure active state of CSX */
+ fsl_dspi_cfg_cs_active_state(&dspi->priv, cs, mode);
+
+ return &dspi->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ free(slave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ uint sr_val;
+ struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
+
+ cpu_dspi_claim_bus(slave->bus, slave->cs);
+
+ fsl_dspi_clr_fifo(&dspi->priv);
+
+ /* check module TX and RX status */
+ sr_val = dspi_read32(dspi->priv.flags, &dspi->priv.regs->sr);
+ if ((sr_val & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) {
+ debug("DSPI RX/TX not ready!\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+ struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
+
+ dspi_halt(&dspi->priv, 1);
+ cpu_dspi_release_bus(slave->bus.slave->cs);
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+ void *din, unsigned long flags)
+{
+ struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
+ return dspi_xfer(&dspi->priv, slave->cs, bitlen, dout, din, flags);
+}
+#else
+static int fsl_dspi_child_pre_probe(struct udevice *dev)
+{
+ struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+ struct fsl_dspi_priv *priv = dev_get_priv(dev->parent);
+
+ if (slave_plat->cs >= priv->num_chipselect) {
+ debug("DSPI invalid chipselect number %d(max %d)!\n",
+ slave_plat->cs, priv->num_chipselect - 1);
+ return -EINVAL;
+ }
+
+ priv->ctar_val[slave_plat->cs] = DSPI_CTAR_DEFAULT_VALUE;
+
+ debug("DSPI pre_probe slave device on CS %u, max_hz %u, mode 0x%x.\n",
+ slave_plat->cs, slave_plat->max_hz, slave_plat->mode);
+
+ return 0;
+}
+
+static int fsl_dspi_probe(struct udevice *bus)
+{
+ struct fsl_dspi_platdata *plat = dev_get_platdata(bus);
+ struct fsl_dspi_priv *priv = dev_get_priv(bus);
+ struct dm_spi_bus *dm_spi_bus;
+ uint mcr_cfg_val;
+
+ dm_spi_bus = bus->uclass_priv;
+
+ /* cpu speical pin muxing configure */
+ cpu_dspi_port_conf();
+
+ /* get input clk frequency */
+ priv->regs = (struct dspi *)plat->regs_addr;
+ priv->flags = plat->flags;
+#ifdef CONFIG_M68K
+ priv->bus_clk = gd->bus_clk;
+#else
+ priv->bus_clk = mxc_get_clock(MXC_DSPI_CLK);
+#endif
+ priv->num_chipselect = plat->num_chipselect;
+ priv->speed_hz = plat->speed_hz;
+ /* frame data length in bits, default 8bits */
+ priv->charbit = 8;
+
+ dm_spi_bus->max_hz = plat->speed_hz;
+
+ /* default: all CS signals inactive state is high */
+ mcr_cfg_val = DSPI_MCR_MSTR | DSPI_MCR_PCSIS_MASK |
+ DSPI_MCR_CRXF | DSPI_MCR_CTXF;
+ fsl_dspi_init_mcr(priv, mcr_cfg_val);
+
+ debug("%s probe done, bus-num %d.\n", bus->name, bus->seq);
+
+ return 0;
+}
+
+static int fsl_dspi_claim_bus(struct udevice *dev)
+{
+ uint sr_val;
+ struct fsl_dspi_priv *priv;
+ struct udevice *bus = dev->parent;
+ struct dm_spi_slave_platdata *slave_plat =
+ dev_get_parent_platdata(dev);
+
+ priv = dev_get_priv(bus);
+
+ /* processor special prepartion work */
+ cpu_dspi_claim_bus(bus->seq, slave_plat->cs);
+
+ /* configure transfer mode */
+ fsl_dspi_cfg_ctar_mode(priv, slave_plat->cs, priv->mode);
+
+ /* configure active state of CSX */
+ fsl_dspi_cfg_cs_active_state(priv, slave_plat->cs,
+ priv->mode);
+
+ fsl_dspi_clr_fifo(priv);
+
+ /* check module TX and RX status */
+ sr_val = dspi_read32(priv->flags, &priv->regs->sr);
+ if ((sr_val & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) {
+ debug("DSPI RX/TX not ready!\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int fsl_dspi_release_bus(struct udevice *dev)
+{
+ struct udevice *bus = dev->parent;
+ struct fsl_dspi_priv *priv = dev_get_priv(bus);
+ struct dm_spi_slave_platdata *slave_plat =
+ dev_get_parent_platdata(dev);
+
+ /* halt module */
+ dspi_halt(priv, 1);
+
+ /* processor special release work */
+ cpu_dspi_release_bus(bus->seq, slave_plat->cs);
+
+ return 0;
+}
+
+/**
+ * This function doesn't do anything except help with debugging
+ */
+static int fsl_dspi_bind(struct udevice *bus)
+{
+ debug("%s assigned req_seq %d.\n", bus->name, bus->req_seq);
+ return 0;
+}
+
+static int fsl_dspi_ofdata_to_platdata(struct udevice *bus)
+{
+ fdt_addr_t addr;
+ struct fsl_dspi_platdata *plat = bus->platdata;
+ const void *blob = gd->fdt_blob;
+ int node = bus->of_offset;
+
+ if (fdtdec_get_bool(blob, node, "big-endian"))
+ plat->flags |= DSPI_FLAG_REGMAP_ENDIAN_BIG;
+
+ plat->num_chipselect =
+ fdtdec_get_int(blob, node, "num-cs", FSL_DSPI_MAX_CHIPSELECT);
+
+ addr = fdtdec_get_addr(blob, node, "reg");
+ if (addr == FDT_ADDR_T_NONE) {
+ debug("DSPI: Can't get base address or size\n");
+ return -ENOMEM;
+ }
+ plat->regs_addr = addr;
+
+ plat->speed_hz = fdtdec_get_int(blob,
+ node, "spi-max-frequency", FSL_DSPI_DEFAULT_SCK_FREQ);
+
+ debug("DSPI: regs=0x%x, max-frequency=%d, endianess=%s, num-cs=%d\n",
+ plat->regs_addr, plat->speed_hz,
+ plat->flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ? "be" : "le",
+ plat->num_chipselect);
+
+ return 0;
+}
+
+static int fsl_dspi_xfer(struct udevice *dev, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct fsl_dspi_priv *priv;
+ struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+ struct udevice *bus;
+
+ bus = dev->parent;
+ priv = dev_get_priv(bus);
+
+ return dspi_xfer(priv, slave_plat->cs, bitlen, dout, din, flags);
+}
+
+static int fsl_dspi_set_speed(struct udevice *bus, uint speed)
+{
+ struct fsl_dspi_priv *priv = dev_get_priv(bus);
+
+ return fsl_dspi_cfg_speed(priv, speed);
+}
+
+static int fsl_dspi_set_mode(struct udevice *bus, uint mode)
+{
+ struct fsl_dspi_priv *priv = dev_get_priv(bus);
+
+ debug("DSPI set_mode: mode 0x%x.\n", mode);
+
+ /*
+ * We store some chipselect special configure value in priv->ctar_val,
+ * and we can't get the correct chipselect number here,
+ * so just store mode value.
+ * Do really configuration when claim_bus.
+ */
+ priv->mode = mode;
+
+ return 0;
+}
+
+static const struct dm_spi_ops fsl_dspi_ops = {
+ .claim_bus = fsl_dspi_claim_bus,
+ .release_bus = fsl_dspi_release_bus,
+ .xfer = fsl_dspi_xfer,
+ .set_speed = fsl_dspi_set_speed,
+ .set_mode = fsl_dspi_set_mode,
+};
+
+static const struct udevice_id fsl_dspi_ids[] = {
+ { .compatible = "fsl,vf610-dspi" },
+ { }
+};
+
+U_BOOT_DRIVER(fsl_dspi) = {
+ .name = "fsl_dspi",
+ .id = UCLASS_SPI,
+ .of_match = fsl_dspi_ids,
+ .ops = &fsl_dspi_ops,
+ .ofdata_to_platdata = fsl_dspi_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct fsl_dspi_platdata),
+ .priv_auto_alloc_size = sizeof(struct fsl_dspi_priv),
+ .probe = fsl_dspi_probe,
+ .child_pre_probe = fsl_dspi_child_pre_probe,
+ .bind = fsl_dspi_bind,
+};
+#endif
diff --git a/include/fsl_dspi.h b/include/fsl_dspi.h
new file mode 100644
index 0000000..b569b4d
--- /dev/null
+++ b/include/fsl_dspi.h
@@ -0,0 +1,150 @@
+/*
+ * Freescale DSPI Module Defines
+ *
+ * Copyright (C) 2004-2007, 2015 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew at freescale.com)
+ * Chao Fu (B44548 at freesacle.com)
+ * Haikun Wang (B53464 at freescale.com)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _FSL_DSPI_H_
+#define _FSL_DSPI_H_
+
+/* DMA Serial Peripheral Interface (DSPI) */
+struct dspi {
+ u32 mcr; /* 0x00 */
+ u32 resv0; /* 0x04 */
+ u32 tcr; /* 0x08 */
+ u32 ctar[8]; /* 0x0C - 0x28 */
+ u32 sr; /* 0x2C */
+ u32 irsr; /* 0x30 */
+ u32 tfr; /* 0x34 - PUSHR */
+ u32 rfr; /* 0x38 - POPR */
+#ifdef CONFIG_MCF547x_8x
+ u32 tfdr[4]; /* 0x3C */
+ u8 resv2[0x30]; /* 0x40 */
+ u32 rfdr[4]; /* 0x7C */
+#else
+ u32 tfdr[16]; /* 0x3C */
+ u32 rfdr[16]; /* 0x7C */
+#endif
+};
+
+/* Module configuration */
+#define DSPI_MCR_MSTR 0x80000000
+#define DSPI_MCR_CSCK 0x40000000
+#define DSPI_MCR_DCONF(x) (((x) & 0x03) << 28)
+#define DSPI_MCR_FRZ 0x08000000
+#define DSPI_MCR_MTFE 0x04000000
+#define DSPI_MCR_PCSSE 0x02000000
+#define DSPI_MCR_ROOE 0x01000000
+#define DSPI_MCR_PCSIS(x) (1 << (16 + (x)))
+#define DSPI_MCR_PCSIS_MASK (0xff << 16)
+#define DSPI_MCR_CSIS7 0x00800000
+#define DSPI_MCR_CSIS6 0x00400000
+#define DSPI_MCR_CSIS5 0x00200000
+#define DSPI_MCR_CSIS4 0x00100000
+#define DSPI_MCR_CSIS3 0x00080000
+#define DSPI_MCR_CSIS2 0x00040000
+#define DSPI_MCR_CSIS1 0x00020000
+#define DSPI_MCR_CSIS0 0x00010000
+#define DSPI_MCR_DOZE 0x00008000
+#define DSPI_MCR_MDIS 0x00004000
+#define DSPI_MCR_DTXF 0x00002000
+#define DSPI_MCR_DRXF 0x00001000
+#define DSPI_MCR_CTXF 0x00000800
+#define DSPI_MCR_CRXF 0x00000400
+#define DSPI_MCR_SMPL_PT(x) (((x) & 0x03) << 8)
+#define DSPI_MCR_FCPCS 0x00000001
+#define DSPI_MCR_PES 0x00000001
+#define DSPI_MCR_HALT 0x00000001
+
+/* Transfer count */
+#define DSPI_TCR_SPI_TCNT(x) (((x) & 0x0000FFFF) << 16)
+
+/* Clock and transfer attributes */
+#define DSPI_CTAR(x) (0x0c + (x * 4))
+#define DSPI_CTAR_DBR 0x80000000
+#define DSPI_CTAR_TRSZ(x) (((x) & 0x0F) << 27)
+#define DSPI_CTAR_CPOL 0x04000000
+#define DSPI_CTAR_CPHA 0x02000000
+#define DSPI_CTAR_LSBFE 0x01000000
+#define DSPI_CTAR_PCSSCK(x) (((x) & 0x03) << 22)
+#define DSPI_CTAR_PCSSCK_7CLK 0x00A00000
+#define DSPI_CTAR_PCSSCK_5CLK 0x00800000
+#define DSPI_CTAR_PCSSCK_3CLK 0x00400000
+#define DSPI_CTAR_PCSSCK_1CLK 0x00000000
+#define DSPI_CTAR_PASC(x) (((x) & 0x03) << 20)
+#define DSPI_CTAR_PASC_7CLK 0x00300000
+#define DSPI_CTAR_PASC_5CLK 0x00200000
+#define DSPI_CTAR_PASC_3CLK 0x00100000
+#define DSPI_CTAR_PASC_1CLK 0x00000000
+#define DSPI_CTAR_PDT(x) (((x) & 0x03) << 18)
+#define DSPI_CTAR_PDT_7CLK 0x000A0000
+#define DSPI_CTAR_PDT_5CLK 0x00080000
+#define DSPI_CTAR_PDT_3CLK 0x00040000
+#define DSPI_CTAR_PDT_1CLK 0x00000000
+#define DSPI_CTAR_PBR(x) (((x) & 0x03) << 16)
+#define DSPI_CTAR_PBR_7CLK 0x00030000
+#define DSPI_CTAR_PBR_5CLK 0x00020000
+#define DSPI_CTAR_PBR_3CLK 0x00010000
+#define DSPI_CTAR_PBR_1CLK 0x00000000
+#define DSPI_CTAR_CSSCK(x) (((x) & 0x0F) << 12)
+#define DSPI_CTAR_ASC(x) (((x) & 0x0F) << 8)
+#define DSPI_CTAR_DT(x) (((x) & 0x0F) << 4)
+#define DSPI_CTAR_BR(x) ((x) & 0x0F)
+
+/* Status */
+#define DSPI_SR_TCF 0x80000000
+#define DSPI_SR_TXRXS 0x40000000
+#define DSPI_SR_EOQF 0x10000000
+#define DSPI_SR_TFUF 0x08000000
+#define DSPI_SR_TFFF 0x02000000
+#define DSPI_SR_RFOF 0x00080000
+#define DSPI_SR_RFDF 0x00020000
+#define DSPI_SR_TXCTR(x) (((x) & 0x0000F000) >> 12)
+#define DSPI_SR_TXPTR(x) (((x) & 0x00000F00) >> 8)
+#define DSPI_SR_RXCTR(x) (((x) & 0x000000F0) >> 4)
+#define DSPI_SR_RXPTR(x) ((x) & 0x0000000F)
+
+/* DMA/interrupt request selct and enable */
+#define DSPI_IRSR_TCFE 0x80000000
+#define DSPI_IRSR_EOQFE 0x10000000
+#define DSPI_IRSR_TFUFE 0x08000000
+#define DSPI_IRSR_TFFFE 0x02000000
+#define DSPI_IRSR_TFFFS 0x01000000
+#define DSPI_IRSR_RFOFE 0x00080000
+#define DSPI_IRSR_RFDFE 0x00020000
+#define DSPI_IRSR_RFDFS 0x00010000
+
+/* Transfer control - 32-bit access */
+#define DSPI_TFR_PCS(x) (((1 << x) & 0x0000003f) << 16)
+#define DSPI_TFR_CONT 0x80000000
+#define DSPI_TFR_CTAS(x) (((x) & 0x07) << 28)
+#define DSPI_TFR_EOQ 0x08000000
+#define DSPI_TFR_CTCNT 0x04000000
+#define DSPI_TFR_CS7 0x00800000
+#define DSPI_TFR_CS6 0x00400000
+#define DSPI_TFR_CS5 0x00200000
+#define DSPI_TFR_CS4 0x00100000
+#define DSPI_TFR_CS3 0x00080000
+#define DSPI_TFR_CS2 0x00040000
+#define DSPI_TFR_CS1 0x00020000
+#define DSPI_TFR_CS0 0x00010000
+
+/* Transfer Fifo */
+#define DSPI_TFR_TXDATA(x) ((x) & 0x0000FFFF)
+
+/* Bit definitions and macros for DRFR */
+#define DSPI_RFR_RXDATA(x) ((x) & 0x0000FFFF)
+
+/* Bit definitions and macros for DTFDR group */
+#define DSPI_TFDR_TXDATA(x) ((x) & 0x0000FFFF)
+#define DSPI_TFDR_TXCMD(x) (((x) & 0x0000FFFF) << 16)
+
+/* Bit definitions and macros for DRFDR group */
+#define DSPI_RFDR_RXDATA(x) ((x) & 0x0000FFFF)
+
+#endif /* _FSL_DSPI_H_ */
--
2.1.0.27.g96db324
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