Move the Freescale DSPI driver over to driver model.
Signed-off-by: Haikun Wang Haikun.Wang@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@denx.de. + * + * Copyright (C) 2004-2009, 2015 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + * Chao Fu (B44548@freescale.com) + * Haikun Wang (B53464@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@freescale.com) + * Chao Fu (B44548@freesacle.com) + * Haikun Wang (B53464@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_ */