[U-Boot] [PATCH 7/7] net: sh_eth: Add DM and DT support
Marek Vasut
marek.vasut at gmail.com
Wed Jan 24 22:21:02 UTC 2018
Add DM capable code into the SH ethernet driver and support probing
both from DT and pdata. The legacy non-DM, non-DT support is retained
as there are still systems in the tree which are not DM or DT capable.
Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Joe Hershberger <joe.hershberger at ni.com>
---
drivers/net/sh_eth.c | 268 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 268 insertions(+)
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c
index 8442fc9a2f..5a5c6bc39e 100644
--- a/drivers/net/sh_eth.c
+++ b/drivers/net/sh_eth.c
@@ -18,6 +18,13 @@
#include <linux/errno.h>
#include <asm/io.h>
+#ifdef CONFIG_DM_ETH
+#include <clk.h>
+#include <dm.h>
+#include <linux/mii.h>
+#include <asm/gpio.h>
+#endif
+
#include "sh_eth.h"
#ifndef CONFIG_SH_ETHER_USE_PORT
@@ -512,6 +519,7 @@ static int sh_eth_start_common(struct sh_eth_dev *eth)
return 0;
}
+#ifndef CONFIG_DM_ETH
static int sh_eth_phy_config_legacy(struct sh_eth_dev *eth)
{
int port = eth->port, ret = 0;
@@ -666,6 +674,266 @@ err:
return ret;
}
+#else /* CONFIG_DM_ETH */
+
+struct sh_ether_priv {
+ struct sh_eth_dev shdev;
+
+ struct mii_dev *bus;
+ void __iomem *iobase;
+ struct clk clk;
+ struct gpio_desc reset_gpio;
+};
+
+static int sh_ether_send(struct udevice *dev, void *packet, int len)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+ struct sh_eth_dev *eth = &priv->shdev;
+
+ return sh_eth_send_common(eth, packet, len);
+}
+
+static int sh_ether_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ struct sh_eth_info *port_info = ð->port_info[eth->port];
+ uchar *packet = (uchar *)ADDR_TO_P2(port_info->rx_desc_cur->rd2);
+ int len;
+
+ len = sh_eth_recv_start(eth);
+ if (len > 0) {
+ invalidate_cache(packet, len);
+ *packetp = packet;
+
+ return len;
+ } else {
+ len = 0;
+
+ /* Restart the receiver if disabled */
+ if (!(sh_eth_read(port_info, EDRRR) & EDRRR_R))
+ sh_eth_write(port_info, EDRRR_R, EDRRR);
+
+ return -EAGAIN;
+ }
+}
+
+static int sh_ether_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ struct sh_eth_info *port_info = ð->port_info[eth->port];
+
+ sh_eth_recv_finish(eth);
+
+ /* Restart the receiver if disabled */
+ if (!(sh_eth_read(port_info, EDRRR) & EDRRR_R))
+ sh_eth_write(port_info, EDRRR_R, EDRRR);
+
+ return 0;
+}
+
+static int sh_ether_write_hwaddr(struct udevice *dev)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ struct sh_eth_info *port_info = ð->port_info[eth->port];
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+
+ sh_eth_write_hwaddr(port_info, pdata->enetaddr);
+
+ return 0;
+}
+
+static int sh_eth_phy_config(struct udevice *dev)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ int port = eth->port, ret = 0;
+ struct sh_eth_info *port_info = ð->port_info[port];
+ struct phy_device *phydev;
+ int mask = 0xffffffff;
+
+ phydev = phy_find_by_mask(priv->bus, mask, pdata->phy_interface);
+ if (!phydev)
+ return -ENODEV;
+
+ phy_connect_dev(phydev, dev);
+
+ port_info->phydev = phydev;
+ phy_config(phydev);
+
+ return ret;
+}
+
+static int sh_ether_start(struct udevice *dev)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ int ret;
+
+ ret = clk_enable(&priv->clk);
+ if (ret)
+ return ret;
+
+ ret = sh_eth_init_common(eth, pdata->enetaddr);
+ if (ret)
+ goto err_clk;
+
+ ret = sh_eth_phy_config(dev);
+ if (ret) {
+ printf(SHETHER_NAME ": phy config timeout\n");
+ goto err_start;
+ }
+
+ ret = sh_eth_start_common(eth);
+ if (ret)
+ goto err_start;
+
+ return 0;
+
+err_start:
+ sh_eth_tx_desc_free(eth);
+ sh_eth_rx_desc_free(eth);
+err_clk:
+ clk_disable(&priv->clk);
+ return ret;
+}
+
+static void sh_ether_stop(struct udevice *dev)
+{
+ struct sh_ether_priv *priv = dev_get_priv(dev);
+
+ sh_eth_stop(&priv->shdev);
+ clk_disable(&priv->clk);
+}
+
+static int sh_ether_probe(struct udevice *udev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(udev);
+ struct sh_ether_priv *priv = dev_get_priv(udev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ struct mii_dev *mdiodev;
+ void __iomem *iobase;
+ int ret;
+
+ iobase = map_physmem(pdata->iobase, 0x1000, MAP_NOCACHE);
+ priv->iobase = iobase;
+
+ ret = clk_get_by_index(udev, 0, &priv->clk);
+ if (ret < 0)
+ goto err_mdio_alloc;
+
+ gpio_request_by_name(udev, "reset-gpios", 0, &priv->reset_gpio,
+ GPIOD_IS_OUT);
+
+ mdiodev = mdio_alloc();
+ if (!mdiodev) {
+ ret = -ENOMEM;
+ goto err_mdio_alloc;
+ }
+
+ mdiodev->read = bb_miiphy_read;
+ mdiodev->write = bb_miiphy_write;
+ bb_miiphy_buses[0].priv = eth;
+ snprintf(mdiodev->name, sizeof(mdiodev->name), udev->name);
+
+ ret = mdio_register(mdiodev);
+ if (ret < 0)
+ goto err_mdio_register;
+
+ priv->bus = miiphy_get_dev_by_name(udev->name);
+
+ eth->port = CONFIG_SH_ETHER_USE_PORT;
+ eth->port_info[eth->port].phy_addr = CONFIG_SH_ETHER_PHY_ADDR;
+ eth->port_info[eth->port].iobase =
+ (void __iomem *)(BASE_IO_ADDR + 0x800 * eth->port);
+
+ return 0;
+
+err_mdio_register:
+ mdio_free(mdiodev);
+err_mdio_alloc:
+ unmap_physmem(priv->iobase, MAP_NOCACHE);
+ return ret;
+}
+
+static int sh_ether_remove(struct udevice *udev)
+{
+ struct sh_ether_priv *priv = dev_get_priv(udev);
+ struct sh_eth_dev *eth = &priv->shdev;
+ struct sh_eth_info *port_info = ð->port_info[eth->port];
+
+ free(port_info->phydev);
+ mdio_unregister(priv->bus);
+ mdio_free(priv->bus);
+
+ if (dm_gpio_is_valid(&priv->reset_gpio))
+ dm_gpio_free(udev, &priv->reset_gpio);
+
+ unmap_physmem(priv->iobase, MAP_NOCACHE);
+
+ return 0;
+}
+
+static const struct eth_ops sh_ether_ops = {
+ .start = sh_ether_start,
+ .send = sh_ether_send,
+ .recv = sh_ether_recv,
+ .free_pkt = sh_ether_free_pkt,
+ .stop = sh_ether_stop,
+ .write_hwaddr = sh_ether_write_hwaddr,
+};
+
+int sh_ether_ofdata_to_platdata(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ const char *phy_mode;
+ const fdt32_t *cell;
+ int ret = 0;
+
+ pdata->iobase = devfdt_get_addr(dev);
+ pdata->phy_interface = -1;
+ phy_mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy-mode",
+ NULL);
+ if (phy_mode)
+ pdata->phy_interface = phy_get_interface_by_name(phy_mode);
+ if (pdata->phy_interface == -1) {
+ debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
+ return -EINVAL;
+ }
+
+ pdata->max_speed = 1000;
+ cell = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "max-speed", NULL);
+ if (cell)
+ pdata->max_speed = fdt32_to_cpu(*cell);
+
+ sprintf(bb_miiphy_buses[0].name, dev->name);
+
+ return ret;
+}
+
+static const struct udevice_id sh_ether_ids[] = {
+ { .compatible = "renesas,ether-r8a7791" },
+ { }
+};
+
+U_BOOT_DRIVER(eth_sh_ether) = {
+ .name = "sh_ether",
+ .id = UCLASS_ETH,
+ .of_match = sh_ether_ids,
+ .ofdata_to_platdata = sh_ether_ofdata_to_platdata,
+ .probe = sh_ether_probe,
+ .remove = sh_ether_remove,
+ .ops = &sh_ether_ops,
+ .priv_auto_alloc_size = sizeof(struct sh_ether_priv),
+ .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
+#endif
+
/******* for bb_miiphy *******/
static int sh_eth_bb_init(struct bb_miiphy_bus *bus)
{
--
2.15.1
More information about the U-Boot
mailing list