Converting to driver model and removes non-dm code.
Reviewed-by: Simon Glass sjg@chromium.org Signed-off-by: Angelo Dureghello angelo@sysam.it --- Changes for v2: - removed non DM code part - add default setup of CTAR registers - add DT CTAR register setup support Changes for v3: - changed commit head - removed spi_slave reference - add #ifdefs for the case OF_PLATDATA is used Changes for v4: - remove all internal static functions that are no more needed including their code in the standard driver methods - add helper macro for ctrl setup - fix wrong fifo level check on spi tx - move code inside same #if (avoid multiple #if on same option) - removed externals and moved bus control code here Changes for v5: - add macros in place of hardcoded values - remove all cpu-related #ifdef and move chip-select operations to architecture level - fix U_BOOT_DRIVER structure --- drivers/spi/cf_spi.c | 482 +++++++++++++++--------- include/dm/platform_data/spi_coldfire.h | 29 ++ 2 files changed, 334 insertions(+), 177 deletions(-) create mode 100644 include/dm/platform_data/spi_coldfire.h
diff --git a/drivers/spi/cf_spi.c b/drivers/spi/cf_spi.c index 522631cbbf..923ff6f311 100644 --- a/drivers/spi/cf_spi.c +++ b/drivers/spi/cf_spi.c @@ -6,23 +6,28 @@ * * Copyright (C) 2004-2009 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + * + * Support for DM and DT, non-DM code removed. + * Copyright (C) 2018 Angelo Dureghello angelo@sysam.it + * + * TODO: fsl_dspi.c should work as a driver for the DSPI module. */
#include <common.h> +#include <dm.h> +#include <dm/platform_data/spi_coldfire.h> #include <spi.h> #include <malloc.h> -#include <asm/immap.h> +#include <asm/coldfire/dspi.h> +#include <asm/io.h>
-struct cf_spi_slave { - struct spi_slave slave; +struct coldfire_spi_priv { + struct dspi *regs; uint baudrate; + int mode; int charbit; };
-extern void cfspi_port_conf(void); -extern int cfspi_claim_bus(uint bus, uint cs); -extern void cfspi_release_bus(uint bus, uint cs); - DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SPI_IDLE_VAL @@ -33,163 +38,193 @@ DECLARE_GLOBAL_DATA_PTR; #endif #endif
-#if defined(CONFIG_CF_DSPI) -/* DSPI specific mode */ -#define SPI_MODE_MOD 0x00200000 -#define SPI_DBLRATE 0x00100000 - -static inline struct cf_spi_slave *to_cf_spi_slave(struct spi_slave *slave) +/* + * DSPI specific mode + * + * bit 31 - 28: Transfer size 3 to 16 bits + * 27 - 26: PCS to SCK delay prescaler + * 25 - 24: After SCK delay prescaler + * 23 - 22: Delay after transfer prescaler + * 21 : Allow overwrite for bit 31-22 and bit 20-8 + * 20 : Double baud rate + * 19 - 16: PCS to SCK delay scaler + * 15 - 12: After SCK delay scaler + * 11 - 8: Delay after transfer scaler + * 7 - 0: SPI_CPHA, SPI_CPOL, SPI_LSB_FIRST + */ +#define SPI_MODE_MOD 0x00200000 +#define SPI_MODE_DBLRATE 0x00100000 + +#define SPI_MODE_XFER_SZ_MASK 0xf0000000 +#define SPI_MODE_DLY_PRE_MASK 0x0fc00000 +#define SPI_MODE_DLY_SCA_MASK 0x000fff00 + +#define MCF_FRM_SZ_16BIT DSPI_CTAR_TRSZ(0xf) +#define MCF_DSPI_SPEED_BESTMATCH 0x7FFFFFFF +#define MCF_DSPI_MAX_CTAR_REGS 8 + +/* Default values */ +#define MCF_DSPI_DEFAULT_SCK_FREQ 10000000 +#define MCF_DSPI_DEFAULT_MAX_CS 4 +#define MCF_DSPI_DEFAULT_MODE 0 + +#define MCF_DSPI_DEFAULT_CTAR (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(1) | \ + DSPI_CTAR_BR(6)) + +#define MCF_CTAR_MODE_MASK (MCF_FRM_SZ_16BIT | \ + DSPI_CTAR_PCSSCK(3) | \ + DSPI_CTAR_PASC_7CLK | \ + DSPI_CTAR_PDT(3) | \ + DSPI_CTAR_CSSCK(0x0f) | \ + DSPI_CTAR_ASC(0x0f) | \ + DSPI_CTAR_DT(0x0f)) + +#define setup_ctrl(ctrl, cs) ((ctrl & 0xFF000000) | ((1 << cs) << 16)) + +static inline void cfspi_tx(struct coldfire_spi_priv *cfspi, + u32 ctrl, u16 data) { - return container_of(slave, struct cf_spi_slave, slave); + /* + * Need to check fifo level here + */ + while ((readl(&cfspi->regs->sr) & 0x0000F000) >= 0x4000) + ; + + writel(ctrl | data, &cfspi->regs->tfr); }
-static void cfspi_init(void) +static inline u16 cfspi_rx(struct coldfire_spi_priv *cfspi) { - volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
- cfspi_port_conf(); /* port configuration */ - - dspi->mcr = DSPI_MCR_MSTR | DSPI_MCR_CSIS7 | DSPI_MCR_CSIS6 | - DSPI_MCR_CSIS5 | DSPI_MCR_CSIS4 | DSPI_MCR_CSIS3 | - DSPI_MCR_CSIS2 | DSPI_MCR_CSIS1 | DSPI_MCR_CSIS0 | - DSPI_MCR_CRXF | DSPI_MCR_CTXF; + while ((readl(&cfspi->regs->sr) & 0x000000F0) == 0) + ;
- /* Default setting in platform configuration */ -#ifdef CONFIG_SYS_DSPI_CTAR0 - dspi->ctar[0] = CONFIG_SYS_DSPI_CTAR0; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR1 - dspi->ctar[1] = CONFIG_SYS_DSPI_CTAR1; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR2 - dspi->ctar[2] = CONFIG_SYS_DSPI_CTAR2; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR3 - dspi->ctar[3] = CONFIG_SYS_DSPI_CTAR3; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR4 - dspi->ctar[4] = CONFIG_SYS_DSPI_CTAR4; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR5 - dspi->ctar[5] = CONFIG_SYS_DSPI_CTAR5; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR6 - dspi->ctar[6] = CONFIG_SYS_DSPI_CTAR6; -#endif -#ifdef CONFIG_SYS_DSPI_CTAR7 - dspi->ctar[7] = CONFIG_SYS_DSPI_CTAR7; -#endif + return readw(&cfspi->regs->rfr); }
-static void cfspi_tx(u32 ctrl, u16 data) +static int coldfire_spi_claim_bus(struct udevice *dev) { - volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; + struct udevice *bus = dev->parent; + struct coldfire_spi_priv *cfspi = dev_get_priv(bus); + struct dspi *dspi = cfspi->regs; + struct dm_spi_slave_platdata *slave_plat = + dev_get_parent_platdata(dev);
- while ((dspi->sr & 0x0000F000) >= 4) ; + if ((in_be32(&dspi->sr) & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) + return -1;
- dspi->tfr = (ctrl | data); + /* Clear FIFO and resume transfer */ + clrbits_be32(&dspi->mcr, DSPI_MCR_CTXF | DSPI_MCR_CRXF); + + dspi_chip_select(slave_plat->cs); + + return 0; }
-static u16 cfspi_rx(void) +static int coldfire_spi_release_bus(struct udevice *dev) { - volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; + struct udevice *bus = dev->parent; + struct coldfire_spi_priv *cfspi = dev_get_priv(bus); + struct dspi *dspi = cfspi->regs; + struct dm_spi_slave_platdata *slave_plat = + dev_get_parent_platdata(dev);
- while ((dspi->sr & 0x000000F0) == 0) ; + /* Clear FIFO */ + clrbits_be32(&dspi->mcr, DSPI_MCR_CTXF | DSPI_MCR_CRXF);
- return (dspi->rfr & 0xFFFF); + dspi_chip_unselect(slave_plat->cs); + + return 0; }
-static int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout, - void *din, ulong flags) +static int coldfire_spi_xfer(struct udevice *dev, unsigned int bitlen, + const void *dout, void *din, + unsigned long flags) { - struct cf_spi_slave *cfslave = to_cf_spi_slave(slave); + struct udevice *bus = dev_get_parent(dev); + struct coldfire_spi_priv *cfspi = dev_get_priv(bus); + struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev); u16 *spi_rd16 = NULL, *spi_wr16 = NULL; u8 *spi_rd = NULL, *spi_wr = NULL; - static u32 ctrl = 0; + static u32 ctrl; uint len = bitlen >> 3;
- if (cfslave->charbit == 16) { + if (cfspi->charbit == 16) { bitlen >>= 1; - spi_wr16 = (u16 *) dout; - spi_rd16 = (u16 *) din; + spi_wr16 = (u16 *)dout; + spi_rd16 = (u16 *)din; } else { - spi_wr = (u8 *) dout; - spi_rd = (u8 *) din; + spi_wr = (u8 *)dout; + spi_rd = (u8 *)din; }
if ((flags & SPI_XFER_BEGIN) == SPI_XFER_BEGIN) ctrl |= DSPI_TFR_CONT;
- ctrl = (ctrl & 0xFF000000) | ((1 << slave->cs) << 16); + ctrl = setup_ctrl(ctrl, slave_plat->cs);
if (len > 1) { int tmp_len = len - 1; + while (tmp_len--) { - if (dout != NULL) { - if (cfslave->charbit == 16) - cfspi_tx(ctrl, *spi_wr16++); + if (dout) { + if (cfspi->charbit == 16) + cfspi_tx(cfspi, ctrl, *spi_wr16++); else - cfspi_tx(ctrl, *spi_wr++); - cfspi_rx(); + cfspi_tx(cfspi, ctrl, *spi_wr++); + cfspi_rx(cfspi); }
- if (din != NULL) { - cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL); - if (cfslave->charbit == 16) - *spi_rd16++ = cfspi_rx(); + if (din) { + cfspi_tx(cfspi, ctrl, CONFIG_SPI_IDLE_VAL); + if (cfspi->charbit == 16) + *spi_rd16++ = cfspi_rx(cfspi); else - *spi_rd++ = cfspi_rx(); + *spi_rd++ = cfspi_rx(cfspi); } }
len = 1; /* remaining byte */ }
- if ((flags & SPI_XFER_END) == SPI_XFER_END) + if (flags & SPI_XFER_END) ctrl &= ~DSPI_TFR_CONT;
if (len) { - if (dout != NULL) { - if (cfslave->charbit == 16) - cfspi_tx(ctrl, *spi_wr16); + if (dout) { + if (cfspi->charbit == 16) + cfspi_tx(cfspi, ctrl, *spi_wr16); else - cfspi_tx(ctrl, *spi_wr); - cfspi_rx(); + cfspi_tx(cfspi, ctrl, *spi_wr); + cfspi_rx(cfspi); }
- if (din != NULL) { - cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL); - if (cfslave->charbit == 16) - *spi_rd16 = cfspi_rx(); + if (din) { + cfspi_tx(cfspi, ctrl, CONFIG_SPI_IDLE_VAL); + if (cfspi->charbit == 16) + *spi_rd16 = cfspi_rx(cfspi); else - *spi_rd = cfspi_rx(); + *spi_rd = cfspi_rx(cfspi); } } else { /* dummy read */ - cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL); - cfspi_rx(); + cfspi_tx(cfspi, ctrl, CONFIG_SPI_IDLE_VAL); + cfspi_rx(cfspi); }
return 0; }
-static struct spi_slave *cfspi_setup_slave(struct cf_spi_slave *cfslave, - uint mode) +static int coldfire_spi_set_speed(struct udevice *bus, uint max_hz) { - /* - * bit definition for mode: - * bit 31 - 28: Transfer size 3 to 16 bits - * 27 - 26: PCS to SCK delay prescaler - * 25 - 24: After SCK delay prescaler - * 23 - 22: Delay after transfer prescaler - * 21 : Allow overwrite for bit 31-22 and bit 20-8 - * 20 : Double baud rate - * 19 - 16: PCS to SCK delay scaler - * 15 - 12: After SCK delay scaler - * 11 - 8: Delay after transfer scaler - * 7 - 0: SPI_CPHA, SPI_CPOL, SPI_LSB_FIRST - */ - volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; + struct coldfire_spi_priv *cfspi = dev_get_priv(bus); + struct dspi *dspi = cfspi->regs; int prescaler[] = { 2, 3, 5, 7 }; int scaler[] = { 2, 4, 6, 8, @@ -198,57 +233,41 @@ static struct spi_slave *cfspi_setup_slave(struct cf_spi_slave *cfslave, 4096, 8192, 16384, 32768 }; int i, j, pbrcnt, brcnt, diff, tmp, dbr = 0; - int best_i, best_j, bestmatch = 0x7FFFFFFF, baud_speed; - u32 bus_setup = 0; + int best_i, best_j, bestmatch = MCF_DSPI_SPEED_BESTMATCH, baud_speed; + u32 bus_setup; + + cfspi->baudrate = max_hz; + + /* Read current setup */ + bus_setup = readl(&dspi->ctar[bus->seq]);
tmp = (prescaler[3] * scaler[15]); /* Maximum and minimum baudrate it can handle */ - if ((cfslave->baudrate > (gd->bus_clk >> 1)) || - (cfslave->baudrate < (gd->bus_clk / tmp))) { + if ((cfspi->baudrate > (gd->bus_clk >> 1)) || + (cfspi->baudrate < (gd->bus_clk / tmp))) { printf("Exceed baudrate limitation: Max %d - Min %d\n", (int)(gd->bus_clk >> 1), (int)(gd->bus_clk / tmp)); - return NULL; + return -1; }
/* Activate Double Baud when it exceed 1/4 the bus clk */ - if ((CONFIG_SYS_DSPI_CTAR0 & DSPI_CTAR_DBR) || - (cfslave->baudrate > (gd->bus_clk / (prescaler[0] * scaler[0])))) { + if ((bus_setup & DSPI_CTAR_DBR) || + (cfspi->baudrate > (gd->bus_clk / (prescaler[0] * scaler[0])))) { bus_setup |= DSPI_CTAR_DBR; dbr = 1; }
- 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; - /* Overwrite default value set in platform configuration file */ - if (mode & SPI_MODE_MOD) { - - if ((mode & 0xF0000000) == 0) - bus_setup |= - dspi->ctar[cfslave->slave.bus] & 0x78000000; - else - bus_setup |= ((mode & 0xF0000000) >> 1); - + if (cfspi->mode & SPI_MODE_MOD) { /* * Check to see if it is enabled by default in platform * config, or manual setting passed by mode parameter */ - if (mode & SPI_DBLRATE) { + if (cfspi->mode & SPI_MODE_DBLRATE) { bus_setup |= DSPI_CTAR_DBR; dbr = 1; } - bus_setup |= (mode & 0x0FC00000) >> 4; /* PSCSCK, PASC, PDT */ - bus_setup |= (mode & 0x000FFF00) >> 4; /* CSSCK, ASC, DT */ - } else - bus_setup |= (dspi->ctar[cfslave->slave.bus] & 0x78FCFFF0); - - cfslave->charbit = - ((dspi->ctar[cfslave->slave.bus] & 0x78000000) == - 0x78000000) ? 16 : 8; + }
pbrcnt = sizeof(prescaler) / sizeof(int); brcnt = sizeof(scaler) / sizeof(int); @@ -259,10 +278,10 @@ static struct spi_slave *cfspi_setup_slave(struct cf_spi_slave *cfslave, for (j = 0; j < brcnt; j++) { tmp = (baud_speed / scaler[j]) * (1 + dbr);
- if (tmp > cfslave->baudrate) - diff = tmp - cfslave->baudrate; + if (tmp > cfspi->baudrate) + diff = tmp - cfspi->baudrate; else - diff = cfslave->baudrate - tmp; + diff = cfspi->baudrate - tmp;
if (diff < bestmatch) { bestmatch = diff; @@ -271,65 +290,174 @@ static struct spi_slave *cfspi_setup_slave(struct cf_spi_slave *cfslave, } } } + + bus_setup &= ~(DSPI_CTAR_PBR(0x03) | DSPI_CTAR_BR(0x0f)); bus_setup |= (DSPI_CTAR_PBR(best_i) | DSPI_CTAR_BR(best_j)); - dspi->ctar[cfslave->slave.bus] = bus_setup; + writel(bus_setup, &dspi->ctar[bus->seq]);
- return &cfslave->slave; + return 0; } -#endif /* CONFIG_CF_DSPI */
-#ifdef CONFIG_CMD_SPI -int spi_cs_is_valid(unsigned int bus, unsigned int cs) +static int coldfire_spi_set_mode(struct udevice *bus, uint mode) { - if (((cs >= 0) && (cs < 8)) && ((bus >= 0) && (bus < 8))) - return 1; - else - return 0; -} + struct coldfire_spi_priv *cfspi = dev_get_priv(bus); + struct dspi *dspi = cfspi->regs; + u32 bus_setup = 0;
-void spi_init(void) -{ - cfspi_init(); -} + cfspi->mode = mode;
-struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - struct cf_spi_slave *cfslave; + if (cfspi->mode & SPI_CPOL) + bus_setup |= DSPI_CTAR_CPOL; + if (cfspi->mode & SPI_CPHA) + bus_setup |= DSPI_CTAR_CPHA; + if (cfspi->mode & SPI_LSB_FIRST) + bus_setup |= DSPI_CTAR_LSBFE;
- if (!spi_cs_is_valid(bus, cs)) - return NULL; + /* Overwrite default value set in platform configuration file */ + if (cfspi->mode & SPI_MODE_MOD) { + if ((cfspi->mode & SPI_MODE_XFER_SZ_MASK) == 0) + bus_setup |= + readl(&dspi->ctar[bus->seq]) & MCF_FRM_SZ_16BIT; + else + bus_setup |= + ((cfspi->mode & SPI_MODE_XFER_SZ_MASK) >> 1);
- cfslave = spi_alloc_slave(struct cf_spi_slave, bus, cs); - if (!cfslave) - return NULL; + /* PSCSCK, PASC, PDT */ + bus_setup |= (cfspi->mode & SPI_MODE_DLY_PRE_MASK) >> 4; + /* CSSCK, ASC, DT */ + bus_setup |= (cfspi->mode & SPI_MODE_DLY_SCA_MASK) >> 4; + } else { + bus_setup |= + (readl(&dspi->ctar[bus->seq]) & MCF_CTAR_MODE_MASK); + } + + cfspi->charbit = + ((readl(&dspi->ctar[bus->seq]) & MCF_FRM_SZ_16BIT) == + MCF_FRM_SZ_16BIT) ? 16 : 8;
- cfslave->baudrate = max_hz; + setbits_be32(&dspi->ctar[bus->seq], bus_setup);
- /* specific setup */ - return cfspi_setup_slave(cfslave, mode); + return 0; }
-void spi_free_slave(struct spi_slave *slave) +static int coldfire_spi_probe(struct udevice *bus) { - struct cf_spi_slave *cfslave = to_cf_spi_slave(slave); + struct coldfire_spi_platdata *plat = dev_get_platdata(bus); + struct coldfire_spi_priv *cfspi = dev_get_priv(bus); + struct dspi *dspi = cfspi->regs; + int i;
- free(cfslave); -} + cfspi->regs = (struct dspi *)plat->regs_addr;
-int spi_claim_bus(struct spi_slave *slave) -{ - return cfspi_claim_bus(slave->bus, slave->cs); + cfspi->baudrate = plat->speed_hz; + cfspi->mode = plat->mode; + + for (i = 0; i < MCF_DSPI_MAX_CTAR_REGS; i++) { + unsigned int ctar = 0; + + if (plat->ctar[i][0] == 0) + break; + + ctar = DSPI_CTAR_TRSZ(plat->ctar[i][0]) | + DSPI_CTAR_PCSSCK(plat->ctar[i][1]) | + DSPI_CTAR_PASC(plat->ctar[i][2]) | + DSPI_CTAR_PDT(plat->ctar[i][3]) | + DSPI_CTAR_CSSCK(plat->ctar[i][4]) | + DSPI_CTAR_ASC(plat->ctar[i][5]) | + DSPI_CTAR_DT(plat->ctar[i][6]) | + DSPI_CTAR_BR(plat->ctar[i][7]); + + writel(ctar, &cfspi->regs->ctar[i]); + } + + /* Default CTARs */ + for (i = 0; i < MCF_DSPI_MAX_CTAR_REGS; i++) + writel(MCF_DSPI_DEFAULT_CTAR, &dspi->ctar[i]); + + dspi->mcr = DSPI_MCR_MSTR | DSPI_MCR_CSIS7 | DSPI_MCR_CSIS6 | + DSPI_MCR_CSIS5 | DSPI_MCR_CSIS4 | DSPI_MCR_CSIS3 | + DSPI_MCR_CSIS2 | DSPI_MCR_CSIS1 | DSPI_MCR_CSIS0 | + DSPI_MCR_CRXF | DSPI_MCR_CTXF; + + return 0; }
-void spi_release_bus(struct spi_slave *slave) +void spi_init(void) { - cfspi_release_bus(slave->bus, slave->cs); }
-int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, - void *din, unsigned long flags) +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) +static int coldfire_dspi_ofdata_to_platdata(struct udevice *bus) { - return cfspi_xfer(slave, bitlen, dout, din, flags); + fdt_addr_t addr; + struct coldfire_spi_platdata *plat = bus->platdata; + const void *blob = gd->fdt_blob; + int node = dev_of_offset(bus); + int *ctar, len; + + addr = devfdt_get_addr(bus); + if (addr == FDT_ADDR_T_NONE) + return -ENOMEM; + + plat->regs_addr = addr; + + plat->num_cs = fdtdec_get_int(blob, node, "num-cs", + MCF_DSPI_DEFAULT_MAX_CS); + + plat->speed_hz = fdtdec_get_int(blob, node, "spi-max-frequency", + MCF_DSPI_DEFAULT_SCK_FREQ); + + plat->mode = fdtdec_get_int(blob, node, "spi-mode", + MCF_DSPI_DEFAULT_MODE); + + memset(plat->ctar, 0, sizeof(plat->ctar)); + + ctar = (int *)fdt_getprop(blob, node, "ctar-params", &len); + + if (ctar && len) { + int i, q, ctar_regs; + + ctar_regs = len / sizeof(unsigned int) / MAX_CTAR_FIELDS; + + if (ctar_regs > MAX_CTAR_REGS) + ctar_regs = MAX_CTAR_REGS; + + for (i = 0; i < ctar_regs; i++) { + for (q = 0; q < MAX_CTAR_FIELDS; q++) + plat->ctar[i][q] = *ctar++; + } + } + + debug("DSPI: regs=%pa, max-frequency=%d, num-cs=%d, mode=%d\n", + (void *)plat->regs_addr, + plat->speed_hz, plat->num_cs, plat->mode); + + return 0; } -#endif /* CONFIG_CMD_SPI */ + +static const struct udevice_id coldfire_spi_ids[] = { + { .compatible = "fsl,mcf-dspi" }, + { } +}; +#endif + +static const struct dm_spi_ops coldfire_spi_ops = { + .claim_bus = coldfire_spi_claim_bus, + .release_bus = coldfire_spi_release_bus, + .xfer = coldfire_spi_xfer, + .set_speed = coldfire_spi_set_speed, + .set_mode = coldfire_spi_set_mode, +}; + +U_BOOT_DRIVER(coldfire_spi) = { + .name = "spi_coldfire", + .id = UCLASS_SPI, +#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) + .of_match = coldfire_spi_ids, + .ofdata_to_platdata = coldfire_dspi_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct coldfire_spi_platdata), +#endif + .probe = coldfire_spi_probe, + .ops = &coldfire_spi_ops, + .priv_auto_alloc_size = sizeof(struct coldfire_spi_priv), +}; diff --git a/include/dm/platform_data/spi_coldfire.h b/include/dm/platform_data/spi_coldfire.h new file mode 100644 index 0000000000..8ad8eaedfd --- /dev/null +++ b/include/dm/platform_data/spi_coldfire.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2018 Angelo Dureghello angelo@sysam.it + */ + +#ifndef __spi_coldfire_h +#define __spi_coldfire_h + +#define MAX_CTAR_REGS 8 +#define MAX_CTAR_FIELDS 8 + +/* + * struct coldfire_spi_platdata - information about a coldfire spi module + * + * @regs_addr: base address for module registers + * @speed_hz: default SCK frequency + * @mode: default SPI mode + * @num_cs: number of DSPI chipselect signals + */ +struct coldfire_spi_platdata { + fdt_addr_t regs_addr; + uint speed_hz; + uint mode; + uint num_cs; + uint ctar[MAX_CTAR_REGS][MAX_CTAR_FIELDS]; +}; + +#endif /* __spi_coldfire_h */ +