[U-Boot] [PATCH v3 3/6] spi: davinci: Full dm conversion

7 May 2018

davinci_spi now support dt along with platform data,
respective boards need to switch into dm for the same.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com
---
Changes for v3:
- rebased to master
drivers/spi/Kconfig                    |  12 +-
 drivers/spi/davinci_spi.c              | 289 +++++++++------------------------
 include/dm/platform_data/spi_davinci.h |  15 ++
 3 files changed, 97 insertions(+), 219 deletions(-)
 create mode 100644 include/dm/platform_data/spi_davinci.h

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 72423beebf..46fc6bfdd7 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -70,6 +70,12 @@ config CADENCE_QSPI
      used to access the SPI NOR flash on platforms embedding this
      Cadence IP core.
+config DAVINCI_SPI
+	bool "Davinci & Keystone SPI driver"
+	depends on ARCH_DAVINCI || ARCH_KEYSTONE
+	help
+	  Enable the Davinci SPI driver
+
 config DESIGNWARE_SPI
    bool "Designware SPI driver"
    help
@@ -259,12 +265,6 @@ config FSL_QSPI
      used to access the SPI NOR flash on platforms embedding this
      Freescale IP core.
-config DAVINCI_SPI
-	bool "Davinci & Keystone SPI driver"
-	depends on ARCH_DAVINCI || ARCH_KEYSTONE
-	help
-	  Enable the Davinci SPI driver
-
 config SH_SPI
    bool "SuperH SPI driver"
    help
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index eda252d0b3..065fa00e17 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -15,6 +15,7 @@
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
 #include <dm.h>
+#include <dm/platform_data/spi_davinci.h>
/* SPIGCR0 */
 #define SPIGCR0_SPIENA_MASK	0x1
@@ -119,9 +120,6 @@ struct davinci_spi_regs {
/* davinci spi slave */
 struct davinci_spi_slave {
-#ifndef CONFIG_DM_SPI
-	struct spi_slave slave;
-#endif
    struct davinci_spi_regs *regs;
    unsigned int freq; /* current SPI bus frequency */
    unsigned int mode; /* current SPI mode used */
@@ -241,11 +239,43 @@ static int davinci_spi_read_write(struct davinci_spi_slave *ds, unsigned
    return 0;
 }
+static int davinci_spi_set_speed(struct udevice *bus, uint max_hz)
+{
+	struct davinci_spi_slave *ds = dev_get_priv(bus);
-static int __davinci_spi_claim_bus(struct davinci_spi_slave *ds, int cs)
+	debug("%s speed %u\n", __func__, max_hz);
+	if (max_hz > CONFIG_SYS_SPI_CLK / 2)
+		return -EINVAL;
+
+	ds->freq = max_hz;
+
+	return 0;
+}
+
+static int davinci_spi_set_mode(struct udevice *bus, uint mode)
+{
+	struct davinci_spi_slave *ds = dev_get_priv(bus);
+
+	debug("%s mode %u\n", __func__, mode);
+	ds->mode = mode;
+
+	return 0;
+}
+
+static int davinci_spi_claim_bus(struct udevice *dev)
 {
+	struct dm_spi_slave_platdata *slave_plat =
+		dev_get_parent_platdata(dev);
+	struct udevice *bus = dev->parent;
+	struct davinci_spi_slave *ds = dev_get_priv(bus);
    unsigned int mode = 0, scalar;
+	if (slave_plat->cs >= ds->num_cs) {
+		printf("Invalid SPI chipselect\n");
+		return -EINVAL;
+	}
+	ds->half_duplex = slave_plat->mode & SPI_PREAMBLE;
+
    /* Enable the SPI hardware */
    writel(SPIGCR0_SPIRST_MASK, &ds->regs->gcr0);
    udelay(1000);
@@ -255,7 +285,7 @@ static int __davinci_spi_claim_bus(struct davinci_spi_slave *ds, int cs)
    writel(SPIGCR1_MASTER_MASK | SPIGCR1_CLKMOD_MASK, &ds->regs->gcr1);
/* CS, CLK, SIMO and SOMI are functional pins */
-	writel(((1 << cs) | SPIPC0_CLKFUN_MASK |
+	writel(((1 << slave_plat->cs) | SPIPC0_CLKFUN_MASK |
    	SPIPC0_DOFUN_MASK | SPIPC0_DIFUN_MASK), &ds->regs->pc0);
/* setup format */
@@ -293,20 +323,32 @@ static int __davinci_spi_claim_bus(struct davinci_spi_slave *ds, int cs)
    return 0;
 }
-static int __davinci_spi_release_bus(struct davinci_spi_slave *ds)
+static int davinci_spi_release_bus(struct udevice *dev)
 {
+	struct davinci_spi_slave *ds = dev_get_priv(dev->parent);
+
    /* Disable the SPI hardware */
    writel(SPIGCR0_SPIRST_MASK, &ds->regs->gcr0);
return 0;
 }
-static int __davinci_spi_xfer(struct davinci_spi_slave *ds,
-		unsigned int bitlen,  const void *dout, void *din,
-		unsigned long flags)
+static int davinci_spi_xfer(struct udevice *dev, unsigned int bitlen,
+			    const void *dout, void *din,
+			    unsigned long flags)
 {
+	struct dm_spi_slave_platdata *slave =
+		dev_get_parent_platdata(dev);
+	struct udevice *bus = dev->parent;
+	struct davinci_spi_slave *ds = dev_get_priv(bus);
    unsigned int len;
+	if (slave->cs >= ds->num_cs) {
+		printf("Invalid SPI chipselect\n");
+		return -EINVAL;
+	}
+	ds->cur_cs = slave->cs;
+
    if (bitlen == 0)
    	/* Finish any previously submitted transfers */
    	goto out;
@@ -340,240 +382,61 @@ out:
    	u8 dummy = 0;
    	davinci_spi_write(ds, 1, &dummy, flags);
    }
-	return 0;
-}
-
-#ifndef CONFIG_DM_SPI
-
-static inline struct davinci_spi_slave *to_davinci_spi(struct spi_slave *slave)
-{
-	return container_of(slave, struct davinci_spi_slave, slave);
-}
-
-int spi_cs_is_valid(unsigned int bus, unsigned int cs)
-{
-	int ret = 0;
-
-	switch (bus) {
-	case SPI0_BUS:
-		if (cs < SPI0_NUM_CS)
-			ret = 1;
-		break;
-#ifdef CONFIG_SYS_SPI1
-	case SPI1_BUS:
-		if (cs < SPI1_NUM_CS)
-			ret = 1;
-		break;
-#endif
-#ifdef CONFIG_SYS_SPI2
-	case SPI2_BUS:
-		if (cs < SPI2_NUM_CS)
-			ret = 1;
-		break;
-#endif
-	default:
-		/* Invalid bus number. Do nothing */
-		break;
-	}
-	return ret;
-}
-
-void spi_cs_activate(struct spi_slave *slave)
-{
-	/* do nothing */
-}
-
-void spi_cs_deactivate(struct spi_slave *slave)
-{
-	/* do nothing */
-}
-
-void spi_init(void)
-{
-	/* do nothing */
-}
-
-struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
-			unsigned int max_hz, unsigned int mode)
-{
-	struct davinci_spi_slave	*ds;
-
-	if (!spi_cs_is_valid(bus, cs))
-		return NULL;
-
-	ds = spi_alloc_slave(struct davinci_spi_slave, bus, cs);
-	if (!ds)
-		return NULL;
-
-	switch (bus) {
-	case SPI0_BUS:
-		ds->regs = (struct davinci_spi_regs *)SPI0_BASE;
-		break;
-#ifdef CONFIG_SYS_SPI1
-	case SPI1_BUS:
-		ds->regs = (struct davinci_spi_regs *)SPI1_BASE;
-		break;
-#endif
-#ifdef CONFIG_SYS_SPI2
-	case SPI2_BUS:
-		ds->regs = (struct davinci_spi_regs *)SPI2_BASE;
-		break;
-#endif
-	default: /* Invalid bus number */
-		return NULL;
-	}
-
-	ds->freq = max_hz;
-	ds->mode = mode;
-
-	return &ds->slave;
-}
-
-void spi_free_slave(struct spi_slave *slave)
-{
-	struct davinci_spi_slave *ds = to_davinci_spi(slave);
-
-	free(ds);
-}
-
-int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
-	     const void *dout, void *din, unsigned long flags)
-{
-	struct davinci_spi_slave *ds = to_davinci_spi(slave);
-
-	ds->cur_cs = slave->cs;
-
-	return __davinci_spi_xfer(ds, bitlen, dout, din, flags);
-}
-
-int spi_claim_bus(struct spi_slave *slave)
-{
-	struct davinci_spi_slave *ds = to_davinci_spi(slave);
-
-#ifdef CONFIG_SPI_HALF_DUPLEX
-	ds->half_duplex = true;
-#else
-	ds->half_duplex = false;
-#endif
-	return __davinci_spi_claim_bus(ds, ds->slave.cs);
-}
-
-void spi_release_bus(struct spi_slave *slave)
-{
-	struct davinci_spi_slave *ds = to_davinci_spi(slave);
-
-	__davinci_spi_release_bus(ds);
-}
-
-#else
-static int davinci_spi_set_speed(struct udevice *bus, uint max_hz)
-{
-	struct davinci_spi_slave *ds = dev_get_priv(bus);
-
-	debug("%s speed %u\n", __func__, max_hz);
-	if (max_hz > CONFIG_SYS_SPI_CLK / 2)
-		return -EINVAL;
-
-	ds->freq = max_hz;
return 0;
 }
-static int davinci_spi_set_mode(struct udevice *bus, uint mode)
-{
-	struct davinci_spi_slave *ds = dev_get_priv(bus);
-
-	debug("%s mode %u\n", __func__, mode);
-	ds->mode = mode;
-
-	return 0;
-}
-
-static int davinci_spi_claim_bus(struct udevice *dev)
-{
-	struct dm_spi_slave_platdata *slave_plat =
-		dev_get_parent_platdata(dev);
-	struct udevice *bus = dev->parent;
-	struct davinci_spi_slave *ds = dev_get_priv(bus);
-
-	if (slave_plat->cs >= ds->num_cs) {
-		printf("Invalid SPI chipselect\n");
-		return -EINVAL;
-	}
-	ds->half_duplex = slave_plat->mode & SPI_PREAMBLE;
-
-	return __davinci_spi_claim_bus(ds, slave_plat->cs);
-}
-
-static int davinci_spi_release_bus(struct udevice *dev)
-{
-	struct davinci_spi_slave *ds = dev_get_priv(dev->parent);
-
-	return __davinci_spi_release_bus(ds);
-}
+static const struct dm_spi_ops davinci_spi_ops = {
+	.claim_bus	= davinci_spi_claim_bus,
+	.release_bus	= davinci_spi_release_bus,
+	.xfer		= davinci_spi_xfer,
+	.set_speed	= davinci_spi_set_speed,
+	.set_mode	= davinci_spi_set_mode,
+};
-static int davinci_spi_xfer(struct udevice *dev, unsigned int bitlen,
-			    const void *dout, void *din,
-			    unsigned long flags)
+static int davinci_spi_probe(struct udevice *bus)
 {
-	struct dm_spi_slave_platdata *slave =
-		dev_get_parent_platdata(dev);
-	struct udevice *bus = dev->parent;
    struct davinci_spi_slave *ds = dev_get_priv(bus);
+	struct davinci_spi_platdata *plat = bus->platdata;
+	ds->regs = plat->regs;
+	ds->num_cs = plat->num_cs;
-	if (slave->cs >= ds->num_cs) {
-		printf("Invalid SPI chipselect\n");
-		return -EINVAL;
-	}
-	ds->cur_cs = slave->cs;
-
-	return __davinci_spi_xfer(ds, bitlen, dout, din, flags);
-}
-
-static int davinci_spi_probe(struct udevice *bus)
-{
-	/* Nothing to do */
    return 0;
 }
+#if CONFIG_IS_ENABLED(OF_CONTROL)
 static int davinci_ofdata_to_platadata(struct udevice *bus)
 {
-	struct davinci_spi_slave *ds = dev_get_priv(bus);
-	const void *blob = gd->fdt_blob;
-	int node = dev_of_offset(bus);
+	struct davinci_spi_platdata *plat = bus->platdata;
+	fdt_addr_t addr;
-	ds->regs = devfdt_map_physmem(bus, sizeof(struct davinci_spi_regs));
-	if (!ds->regs) {
-		printf("%s: could not map device address\n", __func__);
+	addr = devfdt_get_addr(bus);
+	if (addr == FDT_ADDR_T_NONE)
    	return -EINVAL;
-	}
-	ds->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
+
+	plat->regs = (struct davinci_spi_regs *)addr;
+	plat->num_cs = fdtdec_get_int(gd->fdt_blob, dev_of_offset(bus), "num-cs", 4);
return 0;
 }
-static const struct dm_spi_ops davinci_spi_ops = {
-	.claim_bus	= davinci_spi_claim_bus,
-	.release_bus	= davinci_spi_release_bus,
-	.xfer		= davinci_spi_xfer,
-	.set_speed	= davinci_spi_set_speed,
-	.set_mode	= davinci_spi_set_mode,
-};
-
 static const struct udevice_id davinci_spi_ids[] = {
    { .compatible = "ti,keystone-spi" },
    { .compatible = "ti,dm6441-spi" },
    { .compatible = "ti,da830-spi" },
    { }
 };
+#endif
U_BOOT_DRIVER(davinci_spi) = {
    .name = "davinci_spi",
    .id = UCLASS_SPI,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
    .of_match = davinci_spi_ids,
-	.ops = &davinci_spi_ops,
    .ofdata_to_platdata = davinci_ofdata_to_platadata,
-	.priv_auto_alloc_size = sizeof(struct davinci_spi_slave),
+        .platdata_auto_alloc_size = sizeof(struct davinci_spi_platdata),
+#endif
    .probe = davinci_spi_probe,
+	.ops = &davinci_spi_ops,
+	.priv_auto_alloc_size = sizeof(struct davinci_spi_slave),
 };
-#endif
diff --git a/include/dm/platform_data/spi_davinci.h b/include/dm/platform_data/spi_davinci.h
new file mode 100644
index 0000000000..fbc62c262a
--- /dev/null
+++ b/include/dm/platform_data/spi_davinci.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2018 Jagan Teki jagan@amarulasolutions.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __spi_davinci_h
+#define __spi_davinci_h
+
+struct davinci_spi_platdata {
+	struct davinci_spi_regs *regs;
+	u8 num_cs;	   /* total no. of CS available */
+};
+
+#endif /* __spi_davinci_h */
-- 
2.14.3


    