[U-Boot] [PATCH v8 14/17] net: fec_mxc: Add fec_phy_reset support
Joe Hershberger
joe.hershberger at ni.com
Tue May 30 19:35:22 UTC 2017
On Tue, May 23, 2017 at 8:33 AM, Jagan Teki <jagannadh.teki at gmail.com> wrote:
> From: Jagan Teki <jagan at openedev.com>
>
> phy-reset-gpios and phy-reset-duration properties are
> needed for adding mii_dev reset bus operation,
> so the board code not take care of phy_reset anymore
> if it use DM_ETH.
>
> Cc: Joe Hershberger <joe.hershberger at ni.com>
> Cc: Fabio Estevam <fabio.estevam at nxp.com>
> Signed-off-by: Jagan Teki <jagan at openedev.com>
> ---
> Changes for v8:
> - Add 'phy-reset-duration' property support
>
> drivers/net/fec_mxc.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++-----
> drivers/net/fec_mxc.h | 9 ++++++
> include/netdev.h | 5 ++++
> 3 files changed, 89 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
> index 08bea8b..17fe27f 100644
> --- a/drivers/net/fec_mxc.c
> +++ b/drivers/net/fec_mxc.c
> @@ -180,13 +180,27 @@ static int fec_mdio_write(struct ethernet_regs *eth, uint8_t phyaddr,
> static int fec_phy_read(struct mii_dev *bus, int phyaddr, int dev_addr,
> int regaddr)
> {
> - return fec_mdio_read(bus->priv, phyaddr, regaddr);
> +#ifdef CONFIG_DM_ETH
> + struct fec_priv *priv = dev_get_priv((struct udevice *)bus->priv);
> + struct ethernet_regs *eth = priv->eth;
> +#else
> + struct ethernet_regs *eth = bus->priv;
> +#endif
> +
> + return fec_mdio_read(eth, phyaddr, regaddr);
> }
>
> static int fec_phy_write(struct mii_dev *bus, int phyaddr, int dev_addr,
> int regaddr, u16 data)
> {
> - return fec_mdio_write(bus->priv, phyaddr, regaddr, data);
> +#ifdef CONFIG_DM_ETH
> + struct fec_priv *priv = dev_get_priv((struct udevice *)bus->priv);
> + struct ethernet_regs *eth = priv->eth;
> +#else
> + struct ethernet_regs *eth = bus->priv;
> +#endif
> +
> + return fec_mdio_write(eth, phyaddr, regaddr, data);
> }
>
> #ifndef CONFIG_PHYLIB
> @@ -985,9 +999,44 @@ static void fec_free_descs(struct fec_priv *fec)
> free(fec->tbd_base);
> }
>
> +#if defined(CONFIG_DM_ETH) && defined(CONFIG_DM_GPIO)
> +static int fec_phy_reset(struct mii_dev *bus)
> +{
> + struct fec_priv *priv = dev_get_priv((struct udevice *)bus->priv);
> + int ret;
> +
> + if (!dm_gpio_is_valid(&priv->reset_gpio))
> + return 0;
> +
> + /* phy reset */
> + ret = dm_gpio_set_value(&priv->reset_gpio, 0);
> + if (ret)
> + return ret;
> +
> + mdelay(priv->reset_duration);
> +
> + ret = dm_gpio_set_value(&priv->reset_gpio, 1);
> + if (ret)
> + return ret;
> +
> + mdelay(priv->reset_duration);
> +
> + return 0;
> +}
> +#endif
> +
> +#ifdef CONFIG_DM_ETH
> +struct mii_dev *fec_get_miibus(struct udevice *dev, int dev_id)
> +#else
> struct mii_dev *fec_get_miibus(uint32_t base_addr, int dev_id)
> +#endif
> {
> +#ifdef CONFIG_DM_ETH
> + struct fec_priv *priv = dev_get_priv(dev);
> + struct ethernet_regs *eth = priv->eth;
> +#else
> struct ethernet_regs *eth = (struct ethernet_regs *)base_addr;
> +#endif
> struct mii_dev *bus;
> int ret;
>
> @@ -998,7 +1047,14 @@ struct mii_dev *fec_get_miibus(uint32_t base_addr, int dev_id)
> }
> bus->read = fec_phy_read;
> bus->write = fec_phy_write;
> +#ifdef CONFIG_DM_ETH
> + bus->priv = dev;
> +# ifdef CONFIG_DM_GPIO
> + bus->reset = fec_phy_reset;
> +# endif
> +#else
> bus->priv = eth;
> +#endif
> fec_set_dev_name(bus->name, dev_id);
>
> ret = mdio_register(bus);
> @@ -1223,7 +1279,7 @@ static int fecmxc_probe(struct udevice *dev)
> if (ret)
> return ret;
>
> - bus = fec_get_miibus((uint32_t)priv->eth, dev_id);
> + bus = fec_get_miibus(dev, dev_id);
> if (!bus)
> goto err_mii;
>
> @@ -1278,6 +1334,7 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)
> struct eth_pdata *pdata = dev_get_platdata(dev);
> struct fec_priv *priv = dev_get_priv(dev);
> const char *phy_mode;
> + int ret = 0;
>
> pdata->iobase = (phys_addr_t)dev_get_addr(dev);
> priv->eth = (struct ethernet_regs *)pdata->iobase;
> @@ -1292,12 +1349,22 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)
> return -EINVAL;
> }
>
> - /* TODO
> - * Need to get the reset-gpio and related properties from DT
> - * and implemet the enet reset code on .probe call
> - */
> +#ifdef CONFIG_DM_GPIO
> + /* phy reset gpio */
> + ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
> + &priv->reset_gpio, GPIOD_IS_OUT);
> + if (ret == 0) {
> + priv->reset_duration = fdtdec_get_int(gd->fdt_blob,
> + dev_of_offset(dev),
> + "phy-reset-duration", 1);
Seems like
> + /* A sane reset duration should not be longer than 1s */
> + if (priv->reset_duration > 1000)
> + priv->reset_duration = 1;
It seems odd to set it to 1 ms if the requested was too long. Maybe it
should just be priv->reset_duration = MIN(priv->reset_duration, 1000);
?
Also, should the member variable have "_ms" at the end to make the units clear?
> + ret = 0;
> + }
> +#endif
>
> - return 0;
> + return ret;
> }
>
> static const struct udevice_id fecmxc_ids[] = {
> diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h
> index 43a7d7b..fd51d6d 100644
> --- a/drivers/net/fec_mxc.h
> +++ b/drivers/net/fec_mxc.h
> @@ -17,6 +17,10 @@
> #ifndef __FEC_MXC_H
> #define __FEC_MXC_H
>
> +#ifdef CONFIG_DM_GPIO
> +# include <asm-generic/gpio.h>
> +#endif
> +
> /* Layout description of the FEC */
> struct ethernet_regs {
> /* [10:2]addr = 00 */
> @@ -254,6 +258,11 @@ struct fec_priv {
>
> #ifdef CONFIG_DM_ETH
> u32 interface;
> +
> +# ifdef CONFIG_DM_GPIO
> + struct gpio_desc reset_gpio;
> + u32 reset_duration;
> +# endif
> #endif
> };
>
> diff --git a/include/netdev.h b/include/netdev.h
> index 8eb8b46..e5668f4 100644
> --- a/include/netdev.h
> +++ b/include/netdev.h
> @@ -133,7 +133,12 @@ static inline int pci_eth_init(bd_t *bis)
> return num;
> }
>
> +#ifdef CONFIG_DM_ETH
> +struct mii_dev *fec_get_miibus(struct udevice *dev, int dev_id);
> +#else
> struct mii_dev *fec_get_miibus(uint32_t base_addr, int dev_id);
> +#endif
> +
> #ifdef CONFIG_PHYLIB
> struct phy_device;
> int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr,
> --
> 2.7.4
>
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