[U-Boot] [PATCH v4 07/12] drivers: spi: cf_spi: convert to driver model
Angelo Dureghello
angelo at sysam.it
Sun Dec 16 11:22:55 UTC 2018
Converting to driver model and removes non-dm code.
Reviewed-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Angelo Dureghello <angelo at 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
---
drivers/spi/cf_spi.c | 539 ++++++++++++++++--------
include/dm/platform_data/spi_coldfire.h | 29 ++
2 files changed, 401 insertions(+), 167 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..3d02c87637 100644
--- a/drivers/spi/cf_spi.c
+++ b/drivers/spi/cf_spi.c
@@ -6,23 +6,31 @@
*
* Copyright (C) 2004-2009 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew at freescale.com)
+ *
+ * Support for DM and DT, non-DM code removed.
+ * Copyright (C) 2018 Angelo Dureghello <angelo at 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 <wait_bit.h>
+#include <asm/coldfire/dspi.h>
#include <asm/immap.h>
+#include <asm/io.h>
-struct cf_spi_slave {
- struct spi_slave slave;
+struct coldfire_spi_priv {
+ struct dspi *regs;
+ struct gpio *gpio_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
@@ -33,149 +41,267 @@ 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)
+#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 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 */
+ while ((readl(&cfspi->regs->sr) & 0x000000F0) == 0)
+ ;
- 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 readw(&cfspi->regs->rfr);
+}
- /* 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;
+static int coldfire_spi_claim_bus(struct udevice *dev)
+{
+ struct udevice *bus = dev->parent;
+ struct coldfire_spi_priv *cfspi = dev_get_priv(bus);
+ struct dspi *dspi = cfspi->regs;
+#if defined(CONFIG_MCF5445x) || \
+ defined(CONFIG_MCF5441x) || defined(CONFIG_MCF5227x)
+ struct dm_spi_slave_platdata *slave_plat =
+ dev_get_parent_platdata(dev);
+ struct gpio *gpio = cfspi->gpio_regs;
#endif
-#ifdef CONFIG_SYS_DSPI_CTAR5
- dspi->ctar[5] = CONFIG_SYS_DSPI_CTAR5;
+
+ if ((in_be32(&dspi->sr) & DSPI_SR_TXRXS) != DSPI_SR_TXRXS)
+ return -1;
+
+ /* Clear FIFO and resume transfer */
+ clrbits_be32(&dspi->mcr, DSPI_MCR_CTXF | DSPI_MCR_CRXF);
+
+#ifdef CONFIG_MCF5445x
+ switch (slave_plat->cs) {
+ case 0:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS0_PCS0);
+ setbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS0_PCS0);
+ break;
+ case 1:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS1_PCS1);
+ setbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS1_PCS1);
+ break;
+ case 2:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS2_PCS2);
+ setbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS2_PCS2);
+ break;
+ case 3:
+ clrbits_8(&gpio->par_dma, ~GPIO_PAR_DMA_DACK0_UNMASK);
+ setbits_8(&gpio->par_dma, GPIO_PAR_DMA_DACK0_PCS3);
+ break;
+ case 5:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS5_PCS5);
+ setbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS5_PCS5);
+ break;
+ }
#endif
-#ifdef CONFIG_SYS_DSPI_CTAR6
- dspi->ctar[6] = CONFIG_SYS_DSPI_CTAR6;
+
+#ifdef CONFIG_MCF5441x
+ switch (slave_plat->cs) {
+ case 0:
+ clrbits_8(&gpio->par_dspi0, ~GPIO_PAR_DSPI0_PCS0_MASK);
+ setbits_8(&gpio->par_dspi0, GPIO_PAR_DSPI0_PCS0_DSPI0PCS0);
+ break;
+ case 1:
+ clrbits_8(&gpio->par_dspiow, GPIO_PAR_DSPIOW_DSPI0PSC1);
+ setbits_8(&gpio->par_dspiow, GPIO_PAR_DSPIOW_DSPI0PSC1);
+ break;
+ }
#endif
-#ifdef CONFIG_SYS_DSPI_CTAR7
- dspi->ctar[7] = CONFIG_SYS_DSPI_CTAR7;
+
+#ifdef CONFIG_MCF5227x
+ switch (slave_plat->cs) {
+ case 0:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS0_UNMASK);
+ setbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS0_PCS0);
+ break;
+ case 2:
+ clrbits_8(&gpio->par_timer, ~GPIO_PAR_TIMER_T2IN_UNMASK);
+ setbits_8(&gpio->par_timer, GPIO_PAR_TIMER_T2IN_DSPIPCS2);
+ break;
+ }
#endif
+ return 0;
}
-static void cfspi_tx(u32 ctrl, u16 data)
+static int coldfire_spi_release_bus(struct udevice *dev)
{
- volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
-
- while ((dspi->sr & 0x0000F000) >= 4) ;
-
- dspi->tfr = (ctrl | data);
-}
+ struct udevice *bus = dev->parent;
+ struct coldfire_spi_priv *cfspi = dev_get_priv(bus);
+ struct dspi *dspi = cfspi->regs;
+#if defined(CONFIG_MCF5445x) || \
+ defined(CONFIG_MCF5441x) || defined(CONFIG_MCF5227x)
+ struct dm_spi_slave_platdata *slave_plat =
+ dev_get_parent_platdata(dev);
+ struct gpio *gpio = cfspi->gpio_regs;
+#endif
-static u16 cfspi_rx(void)
-{
- volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
+ /* Clear FIFO */
+ clrbits_be32(&dspi->mcr, DSPI_MCR_CTXF | DSPI_MCR_CRXF);
+
+#ifdef CONFIG_MCF5445x
+ switch (slave_plat->cs) {
+ case 0:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS0_PCS0);
+ break;
+ case 1:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS1_PCS1);
+ break;
+ case 2:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS2_PCS2);
+ break;
+ case 3:
+ clrbits_8(&gpio->par_dma, ~GPIO_PAR_DMA_DACK0_UNMASK);
+ break;
+ case 5:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS5_PCS5);
+ break;
+ }
+#endif
- while ((dspi->sr & 0x000000F0) == 0) ;
+#ifdef CONFIG_MCF5441x
+ if (slave_plat->cs == 1)
+ clrbits_8(&gpio->par_dspiow, GPIO_PAR_DSPIOW_DSPI0PSC1);
+#endif
- return (dspi->rfr & 0xFFFF);
+#ifdef CONFIG_MCF5227x
+ switch (slave_plat->cs) {
+ case 0:
+ clrbits_8(&gpio->par_dspi, GPIO_PAR_DSPI_PCS0_PCS0);
+ break;
+ case 2:
+ clrbits_8(&gpio->par_timer, ~GPIO_PAR_TIMER_T2IN_UNMASK);
+ break;
+ }
+#endif
+ 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)
{
+ 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,
+ 16, 32, 64, 128,
+ 256, 512, 1024, 2048,
+ 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;
+
+ cfspi->baudrate = max_hz;
+
/*
* bit definition for mode:
* bit 31 - 28: Transfer size 3 to 16 bits
@@ -189,66 +315,37 @@ static struct spi_slave *cfspi_setup_slave(struct cf_spi_slave *cfslave,
* 11 - 8: Delay after transfer scaler
* 7 - 0: SPI_CPHA, SPI_CPOL, SPI_LSB_FIRST
*/
- volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
- int prescaler[] = { 2, 3, 5, 7 };
- int scaler[] = {
- 2, 4, 6, 8,
- 16, 32, 64, 128,
- 256, 512, 1024, 2048,
- 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;
+
+ /* 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_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 +356,10 @@ 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 +368,173 @@ 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;
+
+ /* Overwrite default value set in platform configuration file */
+ if (cfspi->mode & SPI_MODE_MOD) {
+ if ((cfspi->mode & 0xF0000000) == 0)
+ bus_setup |=
+ readl(&dspi->ctar[bus->seq]) & 0x78000000;
+ else
+ bus_setup |= ((cfspi->mode & 0xF0000000) >> 1);
- if (!spi_cs_is_valid(bus, cs))
- return NULL;
+ /* PSCSCK, PASC, PDT */
+ bus_setup |= (cfspi->mode & 0x0FC00000) >> 4;
+ /* CSSCK, ASC, DT */
+ bus_setup |= (cfspi->mode & 0x000FFF00) >> 4;
+ } else {
+ bus_setup |= (readl(&dspi->ctar[bus->seq]) & 0x78FCFFF0);
+ }
- cfslave = spi_alloc_slave(struct cf_spi_slave, bus, cs);
- if (!cfslave)
- return NULL;
+ cfspi->charbit =
+ ((readl(&dspi->ctar[bus->seq]) & 0x78000000) ==
+ 0x78000000) ? 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;
+ cfspi->gpio_regs = (struct gpio *)MMAP_GPIO;
-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,
+ .probe = coldfire_spi_probe,
+ .ops = &coldfire_spi_ops,
+ .platdata_auto_alloc_size = sizeof(struct coldfire_spi_platdata),
+ .priv_auto_alloc_size = sizeof(struct coldfire_spi_priv),
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+ .of_match = coldfire_spi_ids,
+ .ofdata_to_platdata = coldfire_dspi_ofdata_to_platdata,
+#endif
+};
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 at 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 */
+
--
2.19.1
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