--- /dev/null
+/*
+ * (C) Copyright 2016
+ * Author: Amit Singh Tomar, amittomer25@gmail.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * Ethernet driver for H3/A64/A83T based SoC's
+ *
+ * It is derived from the work done by
+ * LABBE Corentin & Chen-Yu Tsai for Linux, THANKS!
+ *
+*/
+
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/gpio.h>
+#include <common.h>
+#include <dm.h>
+#include <fdt_support.h>
+#include <linux/err.h>
+#include <malloc.h>
+#include <miiphy.h>
+#include <net.h>
+
+#define SCTL_EMAC_TX_CLK_SRC_MII BIT(0)
+#define SCTL_EMAC_EPIT_MII BIT(2)
+#define SCTL_EMAC_CLK_SEL BIT(18) /* 25 Mhz */
+
+#define MDIO_CMD_MII_BUSY BIT(0)
+#define MDIO_CMD_MII_WRITE BIT(1)
+
+#define MDIO_CMD_MII_PHY_REG_ADDR_MASK 0x000001f0
+#define MDIO_CMD_MII_PHY_REG_ADDR_SHIFT 4
+#define MDIO_CMD_MII_PHY_ADDR_MASK 0x0001f000
+#define MDIO_CMD_MII_PHY_ADDR_SHIFT 12
+
+#define CONFIG_TX_DESCR_NUM 32
+#define CONFIG_RX_DESCR_NUM 32
+#define CONFIG_ETH_BUFSIZE 2024
+
+#define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM)
+#define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM)
+
+#define H3_EPHY_DEFAULT_VALUE 0x58000
+#define H3_EPHY_DEFAULT_MASK GENMASK(31, 15)
+#define H3_EPHY_ADDR_SHIFT 20
+#define REG_PHY_ADDR_MASK GENMASK(4, 0)
+#define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */
+#define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */
+#define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */
+
+#define SC_RMII_EN BIT(13)
+#define SC_EPIT BIT(2) /* 1: RGMII, 0: MII */
+#define SC_ETCS_MASK GENMASK(1, 0)
+#define SC_ETCS_EXT_GMII 0x1
+#define SC_ETCS_INT_GMII 0x2
+
+#define CONFIG_MDIO_TIMEOUT (3 * CONFIG_SYS_HZ)
+
+#define AHB_GATE_OFFSET_EPHY 0
+
+#if defined(CONFIG_MACH_SUN8I_H3)
+#define SUN8I_GPD8_GMAC 2
+#else
+#define SUN8I_GPD8_GMAC 4
+#endif
+
+/* H3/A64 EMAC Register's offset */
+#define EMAC_CTL0 0x00
+#define EMAC_CTL1 0x04
+#define EMAC_INT_STA 0x08
+#define EMAC_INT_EN 0x0c
+#define EMAC_TX_CTL0 0x10
+#define EMAC_TX_CTL1 0x14
+#define EMAC_TX_FLOW_CTL 0x1c
+#define EMAC_TX_DMA_DESC 0x20
+#define EMAC_RX_CTL0 0x24
+#define EMAC_RX_CTL1 0x28
+#define EMAC_RX_DMA_DESC 0x34
+#define EMAC_MII_CMD 0x48
+#define EMAC_MII_DATA 0x4c
+#define EMAC_ADDR0_HIGH 0x50
+#define EMAC_ADDR0_LOW 0x54
+#define EMAC_TX_DMA_STA 0xb0
+#define EMAC_TX_CUR_DESC 0xb4
+#define EMAC_TX_CUR_BUF 0xb8
+#define EMAC_RX_DMA_STA 0xc0
+#define EMAC_RX_CUR_DESC 0xc4
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum emac_variant {
+ A83T_EMAC = 1,
+ H3_EMAC,
+ A64_EMAC,
+};
+
+struct emac_dma_desc {
+ u32 status;
+ u32 st;
+ u32 buf_addr;
+ u32 next;
+} __aligned(ARCH_DMA_MINALIGN);
+
+struct emac_eth_dev {
+ struct emac_dma_desc rx_chain[CONFIG_TX_DESCR_NUM];
+ struct emac_dma_desc tx_chain[CONFIG_RX_DESCR_NUM];
+ char rxbuffer[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
+ char txbuffer[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
+
+ u32 interface;
+ u32 phyaddr;
+ u32 link;
+ u32 speed;
+ u32 duplex;
+ u32 phy_configured;
+ u32 tx_currdescnum;
+ u32 rx_currdescnum;
+ u32 addr;
+ u32 tx_slot;
+ bool use_internal_phy;
+
+ enum emac_variant variant;
+ void *mac_reg;
+ phys_addr_t sysctl_reg;
+ struct phy_device *phydev;
+ struct mii_dev *bus;
+};
+
+static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
+{
+ struct emac_eth_dev *priv = bus->priv;
+ ulong start;
+ u32 miiaddr = 0;
+ int timeout = CONFIG_MDIO_TIMEOUT;
+
+ miiaddr &= ~MDIO_CMD_MII_WRITE;
+ miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK;
+ miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
+ MDIO_CMD_MII_PHY_REG_ADDR_MASK;
+
+ miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK;
+
+ miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
+ MDIO_CMD_MII_PHY_ADDR_MASK;
+
+ miiaddr |= MDIO_CMD_MII_BUSY;
+
+ writel(miiaddr, priv->mac_reg + EMAC_MII_CMD);
+
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
+ if (!(readl(priv->mac_reg + EMAC_MII_CMD) & MDIO_CMD_MII_BUSY))
+ return readl(priv->mac_reg + EMAC_MII_DATA);
+ udelay(10);
+ };
+
+ return -1;
+}
+
+static int sun8i_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
+ u16 val)
+{
+ struct emac_eth_dev *priv = bus->priv;
+ ulong start;
+ u32 miiaddr = 0;
+ int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
+
+ miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK;
+ miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
+ MDIO_CMD_MII_PHY_REG_ADDR_MASK;
+
+ miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK;
+ miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
+ MDIO_CMD_MII_PHY_ADDR_MASK;
+
+ miiaddr |= MDIO_CMD_MII_WRITE;
+ miiaddr |= MDIO_CMD_MII_BUSY;
+
+ writel(miiaddr, priv->mac_reg + EMAC_MII_CMD);
+ writel(val, priv->mac_reg + EMAC_MII_DATA);
+
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
+ if (!(readl(priv->mac_reg + EMAC_MII_CMD) &
+ MDIO_CMD_MII_BUSY)) {
+ ret = 0;
+ break;
+ }
+ udelay(10);
+ };
+
+ return ret;
+}
+
+static int _sun8i_write_hwaddr(struct emac_eth_dev *priv, u8 *mac_id)
+{
+ u32 macid_lo, macid_hi;
+
+ macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) +
+ (mac_id[3] << 24);
+ macid_hi = mac_id[4] + (mac_id[5] << 8);
+
+ writel(macid_hi, priv->mac_reg + EMAC_ADDR0_HIGH);
+ writel(macid_lo, priv->mac_reg + EMAC_ADDR0_LOW);
+
+ return 0;
+}
+
+static void sun8i_adjust_link(struct emac_eth_dev *priv,
+ struct phy_device *phydev)
+{
+ u32 v;
+
+ v = readl(priv->mac_reg + EMAC_CTL0);
+
+ if (phydev->duplex)
+ v |= BIT(0);
+ else
+ v &= ~BIT(0);
+
+ v &= ~0x0C;
+
+ switch (phydev->speed) {
+ case 1000:
+ break;
+ case 100:
+ v |= BIT(2);
+ v |= BIT(3);
+ break;
+ case 10:
+ v |= BIT(3);
+ break;
+ }
+ writel(v, priv->mac_reg + EMAC_CTL0);
+}
+
+static int sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 *reg)
+{
+ if (priv->use_internal_phy) {
+ /* H3 based SoC's that has an Internal 100MBit PHY
+ * needs to be configured and powered up before use
+ */
+ *reg &= ~H3_EPHY_DEFAULT_MASK;
+ *reg |= H3_EPHY_DEFAULT_VALUE;
+ *reg |= priv->phyaddr << H3_EPHY_ADDR_SHIFT;
+ *reg &= ~H3_EPHY_SHUTDOWN;
+ *reg |= H3_EPHY_SELECT;
+ } else
+ /* This is to select External Gigabit PHY on
+ * the boards with H3 SoC.
+ */
+ *reg &= ~H3_EPHY_SELECT;
+
+ return 0;
+}
+
+static int sun8i_emac_set_syscon(struct emac_eth_dev *priv)
+{
+ int ret;
+ u32 reg;
+
+ reg = readl(priv->sysctl_reg);
+
+ if (priv->variant == H3_EMAC) {
+ ret = sun8i_emac_set_syscon_ephy(priv, ®);
+ if (ret)
+ return ret;
+ }
+
+ reg &= ~(SC_ETCS_MASK | SC_EPIT);
+ if (priv->variant == H3_EMAC || priv->variant == A64_EMAC)
+ reg &= ~SC_RMII_EN;
+
+ switch (priv->interface) {
+ case PHY_INTERFACE_MODE_MII:
+ /* default */
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ reg |= SC_EPIT | SC_ETCS_INT_GMII;
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ if (priv->variant == H3_EMAC ||
+ priv->variant == A64_EMAC) {
+ reg |= SC_RMII_EN | SC_ETCS_EXT_GMII;
+ break;
+ }
+ /* RMII not supported on A83T */
+ default:
+ debug("%s: Invalid PHY interface\n", __func__);
+ return -EINVAL;
+ }
+
+ writel(reg, priv->sysctl_reg);
+
+ return 0;
+}
+
+static int sun8i_phy_init(struct emac_eth_dev *priv, void *dev)
+{
+ struct phy_device *phydev;
+
+ phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface);
+ if (!phydev)
+ return -ENODEV;
+
+ phy_connect_dev(phydev, dev);
+
+ priv->phydev = phydev;
+ phy_config(priv->phydev);
+
+ return 0;
+}
+
+static void rx_descs_init(struct emac_eth_dev *priv)
+{
+ struct emac_dma_desc *desc_table_p = &priv->rx_chain[0];
+ char *rxbuffs = &priv->rxbuffer[0];
+ struct emac_dma_desc *desc_p;
+ u32 idx;
+
+ /* flush Rx buffers */
+ flush_dcache_range((uintptr_t)rxbuffs, (ulong)rxbuffs +
+ RX_TOTAL_BUFSIZE);
+
+ for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
+ desc_p = &desc_table_p[idx];
+ desc_p->buf_addr = (uintptr_t)&rxbuffs[idx * CONFIG_ETH_BUFSIZE]
+ ;
+ desc_p->next = (uintptr_t)&desc_table_p[idx + 1];
+ desc_p->st |= CONFIG_ETH_BUFSIZE;
+ desc_p->status = BIT(31);
+ }
+
+ /* Correcting the last pointer of the chain */
+ desc_p->next = (uintptr_t)&desc_table_p[0];
+
+ flush_dcache_range((uintptr_t)priv->rx_chain,
+ (uintptr_t)priv->rx_chain +
+ sizeof(priv->rx_chain));
+
+ writel((uintptr_t)&desc_table_p[0], (priv->mac_reg + EMAC_RX_DMA_DESC));
+ priv->rx_currdescnum = 0;
+}
+
+static void tx_descs_init(struct emac_eth_dev *priv)
+{
+ struct emac_dma_desc *desc_table_p = &priv->tx_chain[0];
+ char *txbuffs = &priv->txbuffer[0];
+ struct emac_dma_desc *desc_p;
+ u32 idx;
+
+ for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
+ desc_p = &desc_table_p[idx];
+ desc_p->buf_addr = (uintptr_t)&txbuffs[idx * CONFIG_ETH_BUFSIZE]
+ ;
+ desc_p->next = (uintptr_t)&desc_table_p[idx + 1];
+ desc_p->status = (1 << 31);
+ desc_p->st = 0;
+ }
+
+ /* Correcting the last pointer of the chain */
+ desc_p->next = (uintptr_t)&desc_table_p[0];
+
+ /* Flush all Tx buffer descriptors */
+ flush_dcache_range((uintptr_t)priv->tx_chain,
+ (uintptr_t)priv->tx_chain +
+ sizeof(priv->tx_chain));
+
+ writel((uintptr_t)&desc_table_p[0], priv->mac_reg + EMAC_TX_DMA_DESC);
+ priv->tx_currdescnum = 0;
+}
+
+static int _sun8i_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
+{
+ u32 reg, v;
+ int timeout = 100;
+
+ reg = readl((priv->mac_reg + EMAC_CTL1));
+
+ if (!(reg & 0x1)) {
+ /* Soft reset MAC */
+ setbits_le32((priv->mac_reg + EMAC_CTL1), 0x1);
+ do {
+ reg = readl(priv->mac_reg + EMAC_CTL1);
+ } while ((reg & 0x01) != 0 && (--timeout));
+ if (!timeout) {
+ printf("%s: Timeout\n", __func__);
+ return -1;
+ }
+ }
+
+ /* Rewrite mac address after reset */
+ _sun8i_write_hwaddr(priv, enetaddr);
+
+ v = readl(priv->mac_reg + EMAC_TX_CTL1);
+ /* TX_MD Transmission starts after a full frame located in TX DMA FIFO*/
+ v |= BIT(1);
+ writel(v, priv->mac_reg + EMAC_TX_CTL1);
+
+ v = readl(priv->mac_reg + EMAC_RX_CTL1);
+ /* RX_MD RX DMA reads data from RX DMA FIFO to host memory after a
+ * complete frame has been written to RX DMA FIFO
+ */
+ v |= BIT(1);
+ writel(v, priv->mac_reg + EMAC_RX_CTL1);
+
+ /* DMA */
+ writel(8 << 24, priv->mac_reg + EMAC_CTL1);
+
+ /* Initialize rx/tx descriptors */
+ rx_descs_init(priv);
+ tx_descs_init(priv);
+
+ /* PHY Start Up */
+ genphy_parse_link(priv->phydev);
+
+ sun8i_adjust_link(priv, priv->phydev);
+
+ /* Start RX DMA */
+ v = readl(priv->mac_reg + EMAC_RX_CTL1);
+ v |= BIT(30);
+ writel(v, priv->mac_reg + EMAC_RX_CTL1);
+ /* Start TX DMA */
+ v = readl(priv->mac_reg + EMAC_TX_CTL1);
+ v |= BIT(30);
+ writel(v, priv->mac_reg + EMAC_TX_CTL1);
+
+ /* Enable RX/TX */
+ setbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31));
+ setbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31));
+
+ return 0;
+}
+
+static int parse_phy_pins(struct udevice *dev)
+{
+ int offset;
+ const char *pin_name;
+ int drive, pull, i;
+
+ offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset,
+ "pinctrl-0");
+ if (offset < 0) {
+ printf("WARNING: emac: cannot find pinctrl-0 node\n");
+ return offset;
+ }
+
+ drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
+ "allwinner,drive", 4);
+ pull = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
+ "allwinner,pull", 0);
+ for (i = 0; ; i++) {
+ int pin;
+
+ if (fdt_get_string_index(gd->fdt_blob, offset,
+ "allwinner,pins", i, &pin_name))
+ break;
+ if (pin_name[0] != 'P')
+ continue;
+ pin = (pin_name[1] - 'A') << 5;
+ if (pin >= 26 << 5)
+ continue;
+ pin += simple_strtol(&pin_name[2], NULL, 10);
+
+ sunxi_gpio_set_cfgpin(pin, SUN8I_GPD8_GMAC);
+ sunxi_gpio_set_drv(pin, drive);
+ sunxi_gpio_set_pull(pin, pull);
+ }
+
+ if (!i) {
+ printf("WARNING: emac: cannot find allwinner,pins property\n");
+ return -2;
+ }
+
+ return 0;
+}
+
+static int _sun8i_eth_recv(struct emac_eth_dev *priv, uchar **packetp)
+{
+ u32 status, desc_num = priv->rx_currdescnum;
+ struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
+ int length = -EAGAIN;
+ int good_packet = 1;
+ uintptr_t desc_start = (uintptr_t)desc_p;
+ uintptr_t desc_end = desc_start +
+ roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
+
+ ulong data_start = (uintptr_t)desc_p->buf_addr;
+ ulong data_end;
+
+ /* Invalidate entire buffer descriptor */
+ invalidate_dcache_range(desc_start, desc_end);
+
+ status = desc_p->status;
+
+ /* Check for DMA own bit */
+ if (!(status & BIT(31))) {
+ length = (desc_p->status >> 16) & 0x3FFF;
+
+ if (length < 0x40) {
+ good_packet = 0;
+ debug("RX: Bad Packet (runt)\n");
+ }
+
+ data_end = data_start + length;
+ /* Invalidate received data */
+ invalidate_dcache_range(rounddown(data_start,
+ ARCH_DMA_MINALIGN),
+ roundup(data_end,
+ ARCH_DMA_MINALIGN));
+ if (good_packet) {
+ if (length > CONFIG_ETH_BUFSIZE) {
+ printf("Received packet is too big (len=%d)\n",
+ length);
+ return -EMSGSIZE;
+ }
+ *packetp = (uchar *)(ulong)desc_p->buf_addr;
+ return length;
+ }
+ }
+
+ return length;
+}
+
+static int _sun8i_emac_eth_send(struct emac_eth_dev *priv, void *packet,
+ int len)
+{
+ u32 v, desc_num = priv->tx_currdescnum;
+ struct emac_dma_desc *desc_p = &priv->tx_chain[desc_num];
+ uintptr_t desc_start = (uintptr_t)desc_p;
+ uintptr_t desc_end = desc_start +
+ roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
+
+ uintptr_t data_start = (uintptr_t)desc_p->buf_addr;
+ uintptr_t data_end = data_start +
+ roundup(len, ARCH_DMA_MINALIGN);
+
+ /* Invalidate entire buffer descriptor */
+ invalidate_dcache_range(desc_start, desc_end);
+
+ desc_p->st = len;
+ /* Mandatory undocumented bit */
+ desc_p->st |= BIT(24);
+
+ memcpy((void *)data_start, packet, len);
+
+ /* Flush data to be sent */
+ flush_dcache_range(data_start, data_end);
+
+ /* frame end */
+ desc_p->st |= BIT(30);
+ desc_p->st |= BIT(31);
+
+ /*frame begin */
+ desc_p->st |= BIT(29);
+ desc_p->status = BIT(31);
+
+ /*Descriptors st and status field has changed, so FLUSH it */
+ flush_dcache_range(desc_start, desc_end);
+
+ /* Move to next Descriptor and wrap around */
+ if (++desc_num >= CONFIG_TX_DESCR_NUM)
+ desc_num = 0;
+ priv->tx_currdescnum = desc_num;
+
+ /* Start the DMA */
+ v = readl(priv->mac_reg + EMAC_TX_CTL1);
+ v |= BIT(31);/* mandatory */
+ v |= BIT(30);/* mandatory */
+ writel(v, priv->mac_reg + EMAC_TX_CTL1);
+
+ return 0;
+}
+
+static int sun8i_eth_write_hwaddr(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+
+ return _sun8i_write_hwaddr(priv, pdata->enetaddr);
+}
+
+static void sun8i_emac_board_setup(struct emac_eth_dev *priv)
+{
+ struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+
+ if (priv->use_internal_phy) {
+ /* Set clock gating for ephy */
+ setbits_le32(&ccm->bus_gate4, BIT(AHB_GATE_OFFSET_EPHY));
+
+ /* Set Tx clock source as MII with rate 25 MZ */
+ setbits_le32(priv->sysctl_reg, SCTL_EMAC_TX_CLK_SRC_MII |
+ SCTL_EMAC_EPIT_MII | SCTL_EMAC_CLK_SEL);
+ /* Deassert EPHY */
+ setbits_le32(&ccm->ahb_reset2_cfg, BIT(AHB_RESET_OFFSET_EPHY));
+ }
+
+ /* Set clock gating for emac */
+ setbits_le32(&ccm->ahb_gate0, BIT(AHB_GATE_OFFSET_GMAC));
+
+ /* Set EMAC clock */
+ setbits_le32(&ccm->axi_gate, (BIT(1) | BIT(0)));
+
+ /* De-assert EMAC */
+ setbits_le32(&ccm->ahb_reset0_cfg, BIT(AHB_RESET_OFFSET_GMAC));
+}
+
+static int sun8i_mdio_init(const char *name, struct emac_eth_dev *priv)
+{
+ struct mii_dev *bus = mdio_alloc();
+
+ if (!bus) {
+ debug("Failed to allocate MDIO bus\n");
+ return -ENOMEM;
+ }
+
+ bus->read = sun8i_mdio_read;
+ bus->write = sun8i_mdio_write;
+ snprintf(bus->name, sizeof(bus->name), name);
+ bus->priv = (void *)priv;
+
+ return mdio_register(bus);
+}
+
+static int sun8i_emac_eth_start(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+
+ return _sun8i_emac_eth_init(dev->priv, pdata->enetaddr);
+}
+
+static int sun8i_emac_eth_send(struct udevice *dev, void *packet, int length)
+{
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+
+ return _sun8i_emac_eth_send(priv, packet, length);
+}
+
+static int sun8i_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+
+ return _sun8i_eth_recv(priv, packetp);
+}
+
+static int _sun8i_free_pkt(struct emac_eth_dev *priv)
+{
+ u32 desc_num = priv->rx_currdescnum;
+ struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
+ uintptr_t desc_start = (uintptr_t)desc_p;
+ uintptr_t desc_end = desc_start +
+ roundup(sizeof(u32), ARCH_DMA_MINALIGN);
+
+ /* Make the current descriptor valid again */
+ desc_p->status |= BIT(31);
+
+ /* Flush Status field of descriptor */
+ flush_dcache_range(desc_start, desc_end);
+
+ /* Move to next desc and wrap-around condition. */
+ if (++desc_num >= CONFIG_RX_DESCR_NUM)
+ desc_num = 0;
+ priv->rx_currdescnum = desc_num;
+
+ return 0;
+}
+
+static int sun8i_eth_free_pkt(struct udevice *dev, uchar *packet,
+ int length)
+{
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+
+ return _sun8i_free_pkt(priv);
+}
+
+static void sun8i_emac_eth_stop(struct udevice *dev)
+{
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+
+ /* Stop Rx/Tx transmitter */
+ clrbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31));
+ clrbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31));
+
+ /* Stop TX DMA */
+ clrbits_le32(priv->mac_reg + EMAC_TX_CTL1, BIT(30));
+
+ phy_shutdown(priv->phydev);
+}
+
+static int sun8i_emac_eth_probe(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+
+ priv->mac_reg = (void *)pdata->iobase;
+
+ sun8i_emac_board_setup(priv);
+
+ sun8i_mdio_init(dev->name, priv);
+ priv->bus = miiphy_get_dev_by_name(dev->name);
+
+ sun8i_emac_set_syscon(priv);
+
+ return sun8i_phy_init(priv, dev);
+}
+
+static const struct eth_ops sun8i_emac_eth_ops = {
+ .start = sun8i_emac_eth_start,
+ .write_hwaddr = sun8i_eth_write_hwaddr,
+ .send = sun8i_emac_eth_send,
+ .recv = sun8i_emac_eth_recv,
+ .free_pkt = sun8i_eth_free_pkt,
+ .stop = sun8i_emac_eth_stop,
+};
+
+static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct emac_eth_dev *priv = dev_get_priv(dev);
+ const char *phy_mode;
+ int offset = 0;
+
+ pdata->iobase = dev_get_addr_name(dev, "emac");
+ priv->sysctl_reg = dev_get_addr_name(dev, "syscon");
+
+ pdata->phy_interface = -1;
+ priv->phyaddr = -1;
+ priv->use_internal_phy = false;
+
+ offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset,
+ "phy");
+ if (offset > 0)
+ priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg",
+ -1);
+
+ phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "phy-mode", NULL);
+
+ if (phy_mode)
+ pdata->phy_interface = phy_get_interface_by_name(phy_mode);
+ printf("phy interface%d\n", pdata->phy_interface);
+
+ if (pdata->phy_interface == -1) {
+ debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
+ return -EINVAL;
+ }
+
+ priv->variant = dev_get_driver_data(dev);
+
+ if (!priv->variant) {
+ printf("%s: Missing variant '%s'\n", __func__,
+ (char *)priv->variant);
+ return -EINVAL;
+ }
+
+ if (priv->variant == H3_EMAC) {
+ if (fdt_getprop(gd->fdt_blob, dev->of_offset,
+ "allwinner,use-internal-phy", NULL))
+ priv->use_internal_phy = true;
+ }
+
+ priv->interface = pdata->phy_interface;
+
+ if (!priv->use_internal_phy)
+ parse_phy_pins(dev);
+
+ return 0;
+}
+
+static const struct udevice_id sun8i_emac_eth_ids[] = {
+ {.compatible = "allwinner,sun8i-h3-emac", .data = (uintptr_t)H3_EMAC },
+ {.compatible = "allwinner,sun50i-a64-emac",
+ .data = (uintptr_t)A64_EMAC },
+ {.compatible = "allwinner,sun8i-a83t-emac",
+ .data = (uintptr_t)A83T_EMAC },
+ { }
+};
+
+U_BOOT_DRIVER(eth_sun8i_emac) = {
+ .name = "eth_sun8i_emac",
+ .id = UCLASS_ETH,
+ .of_match = sun8i_emac_eth_ids,
+ .ofdata_to_platdata = sun8i_emac_eth_ofdata_to_platdata,
+ .probe = sun8i_emac_eth_probe,
+ .ops = &sun8i_emac_eth_ops,
+ .priv_auto_alloc_size = sizeof(struct emac_eth_dev),
+ .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
projects / oweals / u-boot.git / commitdiff