X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fspi%2Fspi-uclass.c;h=247abfa72ba1c28f904bd8df846df2e17464e441;hb=fe34b6a4845476208ca7d19a35179e56bebf3877;hp=13c6b77d73df350f943b1dd3c77ce8c7e0fef0c3;hpb=1fba907f9a8d178eee960294ecffc8ee8bc6b00d;p=u-boot

diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
index 13c6b77d73..247abfa72b 100644
--- a/drivers/spi/spi-uclass.c
+++ b/drivers/spi/spi-uclass.c
@@ -12,7 +12,6 @@
 #include <spi.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>
-#include <dm/root.h>
 #include <dm/lists.h>
 #include <dm/util.h>
 
@@ -45,45 +44,46 @@ static int spi_set_speed_mode(struct udevice *bus, int speed, int mode)
 	return 0;
 }
 
-int spi_claim_bus(struct spi_slave *slave)
+int dm_spi_claim_bus(struct udevice *dev)
 {
-	struct udevice *dev = slave->dev;
 	struct udevice *bus = dev->parent;
 	struct dm_spi_ops *ops = spi_get_ops(bus);
-	struct dm_spi_bus *spi = bus->uclass_priv;
+	struct dm_spi_bus *spi = dev_get_uclass_priv(bus);
+	struct spi_slave *slave = dev_get_parent_priv(dev);
 	int speed;
 	int ret;
 
 	speed = slave->max_hz;
 	if (spi->max_hz) {
 		if (speed)
-			speed = min(speed, spi->max_hz);
+			speed = min(speed, (int)spi->max_hz);
 		else
 			speed = spi->max_hz;
 	}
 	if (!speed)
 		speed = 100000;
-	ret = spi_set_speed_mode(bus, speed, slave->mode);
-	if (ret)
-		return ret;
+	if (speed != slave->speed) {
+		ret = spi_set_speed_mode(bus, speed, slave->mode);
+		if (ret)
+			return ret;
+		slave->speed = speed;
+	}
 
-	return ops->claim_bus ? ops->claim_bus(bus) : 0;
+	return ops->claim_bus ? ops->claim_bus(dev) : 0;
 }
 
-void spi_release_bus(struct spi_slave *slave)
+void dm_spi_release_bus(struct udevice *dev)
 {
-	struct udevice *dev = slave->dev;
 	struct udevice *bus = dev->parent;
 	struct dm_spi_ops *ops = spi_get_ops(bus);
 
 	if (ops->release_bus)
-		ops->release_bus(bus);
+		ops->release_bus(dev);
 }
 
-int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
-	     const void *dout, void *din, unsigned long flags)
+int dm_spi_xfer(struct udevice *dev, unsigned int bitlen,
+		const void *dout, void *din, unsigned long flags)
 {
-	struct udevice *dev = slave->dev;
 	struct udevice *bus = dev->parent;
 
 	if (bus->uclass->uc_drv->id != UCLASS_SPI)
@@ -92,55 +92,102 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
 	return spi_get_ops(bus)->xfer(dev, bitlen, dout, din, flags);
 }
 
-int spi_post_bind(struct udevice *dev)
+int spi_claim_bus(struct spi_slave *slave)
+{
+	return dm_spi_claim_bus(slave->dev);
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+	dm_spi_release_bus(slave->dev);
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
+	     const void *dout, void *din, unsigned long flags)
 {
-	/* Scan the bus for devices */
-	return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
+	return dm_spi_xfer(slave->dev, bitlen, dout, din, flags);
 }
 
-int spi_post_probe(struct udevice *dev)
+static int spi_child_post_bind(struct udevice *dev)
 {
-	struct dm_spi_bus *spi = dev->uclass_priv;
+	struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
 
-	spi->max_hz = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+	if (dev->of_offset == -1)
+		return 0;
+
+	return spi_slave_ofdata_to_platdata(gd->fdt_blob, dev->of_offset, plat);
+}
+
+static int spi_post_probe(struct udevice *bus)
+{
+	struct dm_spi_bus *spi = dev_get_uclass_priv(bus);
+
+	spi->max_hz = fdtdec_get_int(gd->fdt_blob, bus->of_offset,
 				     "spi-max-frequency", 0);
 
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+	struct dm_spi_ops *ops = spi_get_ops(bus);
+
+
+	if (ops->claim_bus)
+		ops->claim_bus += gd->reloc_off;
+	if (ops->release_bus)
+		ops->release_bus += gd->reloc_off;
+	if (ops->set_wordlen)
+		ops->set_wordlen += gd->reloc_off;
+	if (ops->xfer)
+		ops->xfer += gd->reloc_off;
+	if (ops->set_speed)
+		ops->set_speed += gd->reloc_off;
+	if (ops->set_mode)
+		ops->set_mode += gd->reloc_off;
+	if (ops->cs_info)
+		ops->cs_info += gd->reloc_off;
+#endif
+
+	return 0;
+}
+
+static int spi_child_pre_probe(struct udevice *dev)
+{
+	struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
+	struct spi_slave *slave = dev_get_parent_priv(dev);
+
+	/*
+	 * This is needed because we pass struct spi_slave around the place
+	 * instead slave->dev (a struct udevice). So we have to have some
+	 * way to access the slave udevice given struct spi_slave. Once we
+	 * change the SPI API to use udevice instead of spi_slave, we can
+	 * drop this.
+	 */
+	slave->dev = dev;
+
+	slave->max_hz = plat->max_hz;
+	slave->mode = plat->mode;
+	slave->mode_rx = plat->mode_rx;
+	slave->wordlen = SPI_DEFAULT_WORDLEN;
+
 	return 0;
 }
 
 int spi_chip_select(struct udevice *dev)
 {
-	struct spi_slave *slave = dev_get_parentdata(dev);
+	struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
 
-	return slave ? slave->cs : -ENOENT;
+	return plat ? plat->cs : -ENOENT;
 }
 
-/**
- * spi_find_chip_select() - Find the slave attached to chip select
- *
- * @bus:	SPI bus to search
- * @cs:		Chip select to look for
- * @devp:	Returns the slave device if found
- * @return 0 if found, -ENODEV on error
- */
-static int spi_find_chip_select(struct udevice *bus, int cs,
-				struct udevice **devp)
+int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp)
 {
 	struct udevice *dev;
 
 	for (device_find_first_child(bus, &dev); dev;
 	     device_find_next_child(&dev)) {
-		struct spi_slave store;
-		struct spi_slave *slave = dev_get_parentdata(dev);
+		struct dm_spi_slave_platdata *plat;
 
-		if (!slave)  {
-			slave = &store;
-			spi_ofdata_to_platdata(gd->fdt_blob, dev->of_offset,
-					       slave);
-		}
-		debug("%s: slave=%p, cs=%d\n", __func__, slave,
-		      slave ? slave->cs : -1);
-		if (slave && slave->cs == cs) {
+		plat = dev_get_parent_platdata(dev);
+		debug("%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
+		if (plat->cs == cs) {
 			*devp = dev;
 			return 0;
 		}
@@ -197,27 +244,6 @@ int spi_cs_info(struct udevice *bus, uint cs, struct spi_cs_info *info)
 	return -ENODEV;
 }
 
-int spi_bind_device(struct udevice *bus, int cs, const char *drv_name,
-		    const char *dev_name, struct udevice **devp)
-{
-	struct driver *drv;
-	int ret;
-
-	drv = lists_driver_lookup_name(drv_name);
-	if (!drv) {
-		printf("Cannot find driver '%s'\n", drv_name);
-		return -ENOENT;
-	}
-	ret = device_bind(bus, drv, dev_name, NULL, -1, devp);
-	if (ret) {
-		printf("Cannot create device named '%s' (err=%d)\n",
-		       dev_name, ret);
-		return ret;
-	}
-
-	return 0;
-}
-
 int spi_find_bus_and_cs(int busnum, int cs, struct udevice **busp,
 			struct udevice **devp)
 {
@@ -245,7 +271,7 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
 		       struct udevice **busp, struct spi_slave **devp)
 {
 	struct udevice *bus, *dev;
-	struct spi_slave *slave;
+	struct dm_spi_slave_platdata *plat;
 	bool created = false;
 	int ret;
 
@@ -264,9 +290,13 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
 	if (ret == -ENODEV && drv_name) {
 		debug("%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
 		      __func__, dev_name, busnum, cs, drv_name);
-		ret = spi_bind_device(bus, cs, drv_name, dev_name, &dev);
+		ret = device_bind_driver(bus, drv_name, dev_name, &dev);
 		if (ret)
 			return ret;
+		plat = dev_get_parent_platdata(dev);
+		plat->cs = cs;
+		plat->max_hz = speed;
+		plat->mode = mode;
 		created = true;
 	} else if (ret) {
 		printf("Invalid chip select %d:%d (err=%d)\n", busnum, cs,
@@ -275,36 +305,33 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
 	}
 
 	if (!device_active(dev)) {
-		slave = (struct spi_slave *)calloc(1,
-						   sizeof(struct spi_slave));
-		if (!slave) {
-			ret = -ENOMEM;
-			goto err;
-		}
+		struct spi_slave *slave;
 
-		ret = spi_ofdata_to_platdata(gd->fdt_blob, dev->of_offset,
-					     slave);
+		ret = device_probe(dev);
 		if (ret)
 			goto err;
-		slave->cs = cs;
+		slave = dev_get_parent_priv(dev);
 		slave->dev = dev;
-		ret = device_probe_child(dev, slave);
-		free(slave);
-		if (ret)
-			goto err;
 	}
 
+	plat = dev_get_parent_platdata(dev);
+	if (!speed) {
+		speed = plat->max_hz;
+		mode = plat->mode;
+	}
 	ret = spi_set_speed_mode(bus, speed, mode);
 	if (ret)
 		goto err;
 
 	*busp = bus;
-	*devp = dev_get_parentdata(dev);
+	*devp = dev_get_parent_priv(dev);
 	debug("%s: bus=%p, slave=%p\n", __func__, bus, *devp);
 
 	return 0;
 
 err:
+	debug("%s: Error path, created=%d, device '%s'\n", __func__,
+	      created, dev->name);
 	if (created) {
 		device_remove(dev);
 		device_unbind(dev);
@@ -326,7 +353,7 @@ struct spi_slave *spi_setup_slave_fdt(const void *blob, int node,
 	ret = device_get_child_by_of_offset(bus, node, &dev);
 	if (ret)
 		return NULL;
-	return dev_get_parentdata(dev);
+	return dev_get_parent_priv(dev);
 }
 
 /* Compatibility function - to be removed */
@@ -351,22 +378,59 @@ void spi_free_slave(struct spi_slave *slave)
 	slave->dev = NULL;
 }
 
-int spi_ofdata_to_platdata(const void *blob, int node,
-			   struct spi_slave *spi)
+int spi_slave_ofdata_to_platdata(const void *blob, int node,
+				 struct dm_spi_slave_platdata *plat)
 {
-	int mode = 0;
+	int mode = 0, mode_rx = 0;
+	int value;
 
-	spi->cs = fdtdec_get_int(blob, node, "reg", -1);
-	spi->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 0);
+	plat->cs = fdtdec_get_int(blob, node, "reg", -1);
+	plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 0);
 	if (fdtdec_get_bool(blob, node, "spi-cpol"))
 		mode |= SPI_CPOL;
 	if (fdtdec_get_bool(blob, node, "spi-cpha"))
 		mode |= SPI_CPHA;
 	if (fdtdec_get_bool(blob, node, "spi-cs-high"))
 		mode |= SPI_CS_HIGH;
+	if (fdtdec_get_bool(blob, node, "spi-3wire"))
+		mode |= SPI_3WIRE;
 	if (fdtdec_get_bool(blob, node, "spi-half-duplex"))
 		mode |= SPI_PREAMBLE;
-	spi->mode = mode;
+
+	/* Device DUAL/QUAD mode */
+	value = fdtdec_get_uint(blob, node, "spi-tx-bus-width", 1);
+	switch (value) {
+	case 1:
+		break;
+	case 2:
+		mode |= SPI_TX_DUAL;
+		break;
+	case 4:
+		mode |= SPI_TX_QUAD;
+		break;
+	default:
+		error("spi-tx-bus-width %d not supported\n", value);
+		break;
+	}
+
+	plat->mode = mode;
+
+	value = fdtdec_get_uint(blob, node, "spi-rx-bus-width", 1);
+	switch (value) {
+	case 1:
+		break;
+	case 2:
+		mode_rx |= SPI_RX_DUAL;
+		break;
+	case 4:
+		mode_rx |= SPI_RX_QUAD;
+		break;
+	default:
+		error("spi-rx-bus-width %d not supported\n", value);
+		break;
+	}
+
+	plat->mode_rx = mode_rx;
 
 	return 0;
 }
@@ -374,9 +438,15 @@ int spi_ofdata_to_platdata(const void *blob, int node,
 UCLASS_DRIVER(spi) = {
 	.id		= UCLASS_SPI,
 	.name		= "spi",
-	.post_bind	= spi_post_bind,
+	.flags		= DM_UC_FLAG_SEQ_ALIAS,
+	.post_bind	= dm_scan_fdt_dev,
 	.post_probe	= spi_post_probe,
+	.child_pre_probe = spi_child_pre_probe,
 	.per_device_auto_alloc_size = sizeof(struct dm_spi_bus),
+	.per_child_auto_alloc_size = sizeof(struct spi_slave),
+	.per_child_platdata_auto_alloc_size =
+			sizeof(struct dm_spi_slave_platdata),
+	.child_post_bind = spi_child_post_bind,
 };
 
 UCLASS_DRIVER(spi_generic) = {