Add support for the snps,reset-gpio, snps,reset-active-low (optional) and snps,reset-delays-us device-tree bindings. The combination of these three define how the PHY should be reset to ensure it's in a sane state.
Signed-off-by: Sjoerd Simons sjoerd.simons@collabora.co.uk ---
drivers/net/designware.c | 74 ++++++++++++++++++++++++++++++++++++++++++++---- drivers/net/designware.h | 11 +++++++ 2 files changed, 79 insertions(+), 6 deletions(-)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c index 6433896..f9ceec2 100644 --- a/drivers/net/designware.c +++ b/drivers/net/designware.c @@ -28,7 +28,12 @@ DECLARE_GLOBAL_DATA_PTR;
static int dw_mdio_read(struct mii_dev *bus, int addr, int devad, int reg) { +#ifdef CONFIG_DM_ETH + struct dw_eth_dev *priv = dev_get_priv((struct udevice *)bus->priv); + struct eth_mac_regs *mac_p = priv->mac_regs_p; +#else struct eth_mac_regs *mac_p = bus->priv; +#endif ulong start; u16 miiaddr; int timeout = CONFIG_MDIO_TIMEOUT; @@ -51,7 +56,12 @@ static int dw_mdio_read(struct mii_dev *bus, int addr, int devad, int reg) static int dw_mdio_write(struct mii_dev *bus, int addr, int devad, int reg, u16 val) { +#ifdef CONFIG_DM_ETH + struct dw_eth_dev *priv = dev_get_priv((struct udevice *)bus->priv); + struct eth_mac_regs *mac_p = priv->mac_regs_p; +#else struct eth_mac_regs *mac_p = bus->priv; +#endif ulong start; u16 miiaddr; int ret = -ETIMEDOUT, timeout = CONFIG_MDIO_TIMEOUT; @@ -74,7 +84,40 @@ static int dw_mdio_write(struct mii_dev *bus, int addr, int devad, int reg, return ret; }
-static int dw_mdio_init(const char *name, struct eth_mac_regs *mac_regs_p) +#if CONFIG_DM_ETH +static int dw_mdio_reset(struct mii_dev *bus) +{ + struct udevice *dev = bus->priv; + struct dw_eth_pdata *pdata = dev_get_platdata(dev); + int ret; + + if (pdata->reset_gpio.dev == NULL) + return 0; + + /* reset the phy */ + ret = dm_gpio_set_value(&pdata->reset_gpio, 0); + if (ret) + return ret; + + udelay(pdata->reset_delays[0]); + + ret = dm_gpio_set_value(&pdata->reset_gpio, 1); + if (ret) + return ret; + + udelay(pdata->reset_delays[1]); + + ret = dm_gpio_set_value(&pdata->reset_gpio, 0); + if (ret) + return ret; + + udelay(pdata->reset_delays[2]); + + return 0; +} +#endif + +static int dw_mdio_init(const char *name, void *priv) { struct mii_dev *bus = mdio_alloc();
@@ -85,9 +128,12 @@ static int dw_mdio_init(const char *name, struct eth_mac_regs *mac_regs_p)
bus->read = dw_mdio_read; bus->write = dw_mdio_write; +#ifdef CONFIG_DM_ETH + bus->reset = dw_mdio_reset; +#endif snprintf(bus->name, sizeof(bus->name), name);
- bus->priv = (void *)mac_regs_p; + bus->priv = priv;
return mdio_register(bus); } @@ -604,7 +650,7 @@ static int designware_eth_probe(struct udevice *dev) priv->dma_regs_p = (struct eth_dma_regs *)(iobase + DW_DMA_BASE_OFFSET); priv->interface = pdata->phy_interface;
- dw_mdio_init(dev->name, priv->mac_regs_p); + dw_mdio_init(dev->name, dev); priv->bus = miiphy_get_dev_by_name(dev->name);
ret = dw_phy_init(priv, dev); @@ -624,8 +670,11 @@ static const struct eth_ops designware_eth_ops = {
static int designware_eth_ofdata_to_platdata(struct udevice *dev) { - struct eth_pdata *pdata = dev_get_platdata(dev); + struct dw_eth_pdata *dw_pdata = dev_get_platdata(dev); + struct eth_pdata *pdata = &dw_pdata->eth_pdata; const char *phy_mode; + int reset_flags = GPIOD_IS_OUT; + int ret = 0;
pdata->iobase = dev_get_addr(dev); pdata->phy_interface = -1; @@ -637,7 +686,20 @@ static int designware_eth_ofdata_to_platdata(struct udevice *dev) return -EINVAL; }
- return 0; + if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, + "snps,reset-active-low")) + reset_flags |= GPIOD_ACTIVE_LOW; + + ret = gpio_request_by_name(dev, "snps,reset-gpio", 0, + &dw_pdata->reset_gpio, reset_flags); + if (ret == 0) { + ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, + "snps,reset-delays-us", dw_pdata->reset_delays, 3); + } else if (ret == -ENOENT) { + ret = 0; + } + + return ret; }
static const struct udevice_id designware_eth_ids[] = { @@ -655,7 +717,7 @@ U_BOOT_DRIVER(eth_designware) = { .probe = designware_eth_probe, .ops = &designware_eth_ops, .priv_auto_alloc_size = sizeof(struct dw_eth_dev), - .platdata_auto_alloc_size = sizeof(struct eth_pdata), + .platdata_auto_alloc_size = sizeof(struct dw_eth_pdata), .flags = DM_FLAG_ALLOC_PRIV_DMA, };
diff --git a/drivers/net/designware.h b/drivers/net/designware.h index 4b9ec39..f34263b 100644 --- a/drivers/net/designware.h +++ b/drivers/net/designware.h @@ -8,6 +8,9 @@ #ifndef _DW_ETH_H #define _DW_ETH_H
+#include <common.h> +#include <asm/gpio.h> + #define CONFIG_TX_DESCR_NUM 16 #define CONFIG_RX_DESCR_NUM 16 #define CONFIG_ETH_BUFSIZE 2048 @@ -235,4 +238,12 @@ struct dw_eth_dev { struct mii_dev *bus; };
+#ifdef CONFIG_DM_ETH +struct dw_eth_pdata { + struct eth_pdata eth_pdata; + struct gpio_desc reset_gpio; + u32 reset_delays[3]; +}; +#endif + #endif