[U-Boot] [PATCH] net: Add ag7xxx driver for Atheros MIPS

Marek Vasut
2016-05-24T21:29:09Z

Add ethernet driver for the AR933x and AR934x Atheros MIPS machines.
The driver could be easily extended to other WiSoCs.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Wills Wang <wills.wang@live.com>
---
V2: - Drop the printf() in case malloc fails, it's pointless to try
and print something if we cannot allocate memory, since printf
also allocates memory.
V3: - Replace magic 0x11 with MII_MIPSCR register
---
drivers/net/Kconfig | 9 +
drivers/net/Makefile | 1 +
drivers/net/ag7xxx.c | 980 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 990 insertions(+)
create mode 100644 drivers/net/ag7xxx.c

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 91b7690..00f151f 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -46,6 +46,15 @@ menuconfig NETDEVICES

if NETDEVICES

+config AG7XXX
+ bool "Atheros AG7xxx Ethernet MAC support"
+ depends on DM_ETH
+ select PHYLIB
+ help
+ This driver supports the Atheros AG7xxx Ethernet MAC. This MAC is
+ present in the Atheros AR7xxx, AR9xxx and QCA9xxx MIPS chips.
+
+
config ALTERA_TSE
bool "Altera Triple-Speed Ethernet MAC support"
depends on DM_ETH
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index fbedd04..55d56a0 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -7,6 +7,7 @@

obj-$(CONFIG_PPC4xx_EMAC) += 4xx_enet.o
obj-$(CONFIG_ALTERA_TSE) += altera_tse.o
+obj-$(CONFIG_AG7XXX) += ag7xxx.o
obj-$(CONFIG_ARMADA100_FEC) += armada100_fec.o
obj-$(CONFIG_DRIVER_AT91EMAC) += at91_emac.o
obj-$(CONFIG_DRIVER_AX88180) += ax88180.o
diff --git a/drivers/net/ag7xxx.c b/drivers/net/ag7xxx.c
new file mode 100644
index 0000000..346f138
--- /dev/null
+++ b/drivers/net/ag7xxx.c
@@ -0,0 +1,980 @@
+/*
+ * Atheros AR71xx / AR9xxx GMAC driver
+ *
+ * Copyright (C) 2016 Marek Vasut <marex@denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <miiphy.h>
+#include <malloc.h>
+#include <linux/compiler.h>
+#include <linux/err.h>
+#include <linux/mii.h>
+#include <wait_bit.h>
+#include <asm/io.h>
+
+#include <mach/ath79.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum ag7xxx_model {
+ AG7XXX_MODEL_AG933X,
+ AG7XXX_MODEL_AG934X,
+};
+
+#define AG7XXX_ETH_CFG1 0x00
+#define AG7XXX_ETH_CFG1_SOFT_RST BIT(31)
+#define AG7XXX_ETH_CFG1_RX_RST BIT(19)
+#define AG7XXX_ETH_CFG1_TX_RST BIT(18)
+#define AG7XXX_ETH_CFG1_LOOPBACK BIT(8)
+#define AG7XXX_ETH_CFG1_RX_EN BIT(2)
+#define AG7XXX_ETH_CFG1_TX_EN BIT(0)
+
+#define AG7XXX_ETH_CFG2 0x04
+#define AG7XXX_ETH_CFG2_IF_1000 BIT(9)
+#define AG7XXX_ETH_CFG2_IF_10_100 BIT(8)
+#define AG7XXX_ETH_CFG2_IF_SPEED_MASK (3 << 8)
+#define AG7XXX_ETH_CFG2_HUGE_FRAME_EN BIT(5)
+#define AG7XXX_ETH_CFG2_LEN_CHECK BIT(4)
+#define AG7XXX_ETH_CFG2_PAD_CRC_EN BIT(2)
+#define AG7XXX_ETH_CFG2_FDX BIT(0)
+
+#define AG7XXX_ETH_MII_MGMT_CFG 0x20
+#define AG7XXX_ETH_MII_MGMT_CFG_RESET BIT(31)
+
+#define AG7XXX_ETH_MII_MGMT_CMD 0x24
+#define AG7XXX_ETH_MII_MGMT_CMD_READ 0x1
+
+#define AG7XXX_ETH_MII_MGMT_ADDRESS 0x28
+#define AG7XXX_ETH_MII_MGMT_ADDRESS_SHIFT 8
+
+#define AG7XXX_ETH_MII_MGMT_CTRL 0x2c
+
+#define AG7XXX_ETH_MII_MGMT_STATUS 0x30
+
+#define AG7XXX_ETH_MII_MGMT_IND 0x34
+#define AG7XXX_ETH_MII_MGMT_IND_INVALID BIT(2)
+#define AG7XXX_ETH_MII_MGMT_IND_BUSY BIT(0)
+
+#define AG7XXX_ETH_ADDR1 0x40
+#define AG7XXX_ETH_ADDR2 0x44
+
+#define AG7XXX_ETH_FIFO_CFG_0 0x48
+#define AG7XXX_ETH_FIFO_CFG_1 0x4c
+#define AG7XXX_ETH_FIFO_CFG_2 0x50
+#define AG7XXX_ETH_FIFO_CFG_3 0x54
+#define AG7XXX_ETH_FIFO_CFG_4 0x58
+#define AG7XXX_ETH_FIFO_CFG_5 0x5c
+
+#define AG7XXX_ETH_DMA_TX_CTRL 0x180
+#define AG7XXX_ETH_DMA_TX_CTRL_TXE BIT(0)
+
+#define AG7XXX_ETH_DMA_TX_DESC 0x184
+
+#define AG7XXX_ETH_DMA_TX_STATUS 0x188
+
+#define AG7XXX_ETH_DMA_RX_CTRL 0x18c
+#define AG7XXX_ETH_DMA_RX_CTRL_RXE BIT(0)
+
+#define AG7XXX_ETH_DMA_RX_DESC 0x190
+
+#define AG7XXX_ETH_DMA_RX_STATUS 0x194
+
+/* Custom register@0x18070000 */
+#define AG7XXX_GMAC_ETH_CFG 0x00
+#define AG7XXX_ETH_CFG_SW_PHY_ADDR_SWAP BIT(8)
+#define AG7XXX_ETH_CFG_SW_PHY_SWAP BIT(7)
+#define AG7XXX_ETH_CFG_SW_ONLY_MODE BIT(6)
+#define AG7XXX_ETH_CFG_GE0_ERR_EN BIT(5)
+#define AG7XXX_ETH_CFG_MII_GE0_SLAVE BIT(4)
+#define AG7XXX_ETH_CFG_MII_GE0_MASTER BIT(3)
+#define AG7XXX_ETH_CFG_GMII_GE0 BIT(2)
+#define AG7XXX_ETH_CFG_MII_GE0 BIT(1)
+#define AG7XXX_ETH_CFG_RGMII_GE0 BIT(0)
+
+#define CONFIG_TX_DESCR_NUM 8
+#define CONFIG_RX_DESCR_NUM 8
+#define CONFIG_ETH_BUFSIZE 2048
+#define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM)
+#define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM)
+
+/* DMA descriptor. */
+struct ag7xxx_dma_desc {
+ u32 data_addr;
+#define AG7XXX_DMADESC_IS_EMPTY BIT(31)
+#define AG7XXX_DMADESC_FTPP_OVERRIDE_OFFSET 16
+#define AG7XXX_DMADESC_PKT_SIZE_OFFSET 0
+#define AG7XXX_DMADESC_PKT_SIZE_MASK 0xfff
+ u32 config;
+ u32 next_desc;
+ u32 _pad[5];
+};
+
+struct ar7xxx_eth_priv {
+ struct ag7xxx_dma_desc tx_mac_descrtable[CONFIG_TX_DESCR_NUM];
+ struct ag7xxx_dma_desc rx_mac_descrtable[CONFIG_RX_DESCR_NUM];
+ char txbuffs[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
+ char rxbuffs[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
+
+ void __iomem *regs;
+ void __iomem *phyregs;
+
+ struct eth_device *dev;
+ struct phy_device *phydev;
+ struct mii_dev *bus;
+
+ u32 interface;
+ u32 tx_currdescnum;
+ u32 rx_currdescnum;
+ enum ag7xxx_model model;
+};
+
+/*
+ * Switch and MDIO access
+ */
+static int ag7xxx_switch_read(struct mii_dev *bus, int addr, int reg, u16 *val)
+{
+ struct ar7xxx_eth_priv *priv = bus->priv;
+ void __iomem *regs = priv->phyregs;
+ int ret;
+
+ writel(0x0, regs + AG7XXX_ETH_MII_MGMT_CMD);
+ writel((addr << AG7XXX_ETH_MII_MGMT_ADDRESS_SHIFT) | reg,
+ regs + AG7XXX_ETH_MII_MGMT_ADDRESS);
+ writel(AG7XXX_ETH_MII_MGMT_CMD_READ,
+ regs + AG7XXX_ETH_MII_MGMT_CMD);
+
+ ret = wait_for_bit("ag7xxx", regs + AG7XXX_ETH_MII_MGMT_IND,
+ AG7XXX_ETH_MII_MGMT_IND_BUSY, 0, 1000, 0);
+ if (ret)
+ return ret;
+
+ *val = readl(regs + AG7XXX_ETH_MII_MGMT_STATUS) & 0xffff;
+ writel(0x0, regs + AG7XXX_ETH_MII_MGMT_CMD);
+
+ return 0;
+}
+
+static int ag7xxx_switch_write(struct mii_dev *bus, int addr, int reg, u16 val)
+{
+ struct ar7xxx_eth_priv *priv = bus->priv;
+ void __iomem *regs = priv->phyregs;
+ int ret;
+
+ writel((addr << AG7XXX_ETH_MII_MGMT_ADDRESS_SHIFT) | reg,
+ regs + AG7XXX_ETH_MII_MGMT_ADDRESS);
+ writel(val, regs + AG7XXX_ETH_MII_MGMT_CTRL);
+
+ ret = wait_for_bit("ag7xxx", regs + AG7XXX_ETH_MII_MGMT_IND,
+ AG7XXX_ETH_MII_MGMT_IND_BUSY, 0, 1000, 0);
+
+ return ret;
+}
+
+static int ag7xxx_switch_reg_read(struct mii_dev *bus, int reg, u32 *val)
+{
+ struct ar7xxx_eth_priv *priv = bus->priv;
+ u32 phy_addr;
+ u32 reg_addr;
+ u32 phy_temp;
+ u32 reg_temp;
+ u16 rv = 0;
+ int ret;
+
+ if (priv->model == AG7XXX_MODEL_AG933X) {
+ phy_addr = 0x1f;
+ reg_addr = 0x10;
+ } else if (priv->model == AG7XXX_MODEL_AG934X) {
+ phy_addr = 0x18;
+ reg_addr = 0x00;
+ } else
+ return -EINVAL;
+
+ ret = ag7xxx_switch_write(bus, phy_addr, reg_addr, reg >> 9);
+ if (ret)
+ return ret;
+
+ phy_temp = ((reg >> 6) & 0x7) | 0x10;
+ reg_temp = (reg >> 1) & 0x1e;
+ *val = 0;
+
+ ret = ag7xxx_switch_read(bus, phy_temp, reg_temp | 0, &rv);
+ if (ret < 0)
+ return ret;
+ *val |= rv;
+
+ ret = ag7xxx_switch_read(bus, phy_temp, reg_temp | 1, &rv);
+ if (ret < 0)
+ return ret;
+ *val |= (rv << 16);
+
+ return 0;
+}
+
+static int ag7xxx_switch_reg_write(struct mii_dev *bus, int reg, u32 val)
+{
+ struct ar7xxx_eth_priv *priv = bus->priv;
+ u32 phy_addr;
+ u32 reg_addr;
+ u32 phy_temp;
+ u32 reg_temp;
+ int ret;
+
+ if (priv->model == AG7XXX_MODEL_AG933X) {
+ phy_addr = 0x1f;
+ reg_addr = 0x10;
+ } else if (priv->model == AG7XXX_MODEL_AG934X) {
+ phy_addr = 0x18;
+ reg_addr = 0x00;
+ } else
+ return -EINVAL;
+
+ ret = ag7xxx_switch_write(bus, phy_addr, reg_addr, reg >> 9);
+ if (ret)
+ return ret;
+
+ phy_temp = ((reg >> 6) & 0x7) | 0x10;
+ reg_temp = (reg >> 1) & 0x1e;
+
+ /*
+ * The switch on AR933x has some special register behavior, which
+ * expects particular write order of their nibbles:
+ * 0x40 ..... MSB first, LSB second
+ * 0x50 ..... MSB first, LSB second
+ * 0x98 ..... LSB first, MSB second
+ * others ... don't care
+ */
+ if ((priv->model == AG7XXX_MODEL_AG933X) && (reg == 0x98)) {
+ ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 0, val & 0xffff);
+ if (ret < 0)
+ return ret;
+
+ ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 1, val >> 16);
+ if (ret < 0)
+ return ret;
+ } else {
+ ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 1, val >> 16);
+ if (ret < 0)
+ return ret;
+
+ ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 0, val & 0xffff);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static u16 ag7xxx_mdio_rw(struct mii_dev *bus, int addr, int reg, u32 val)
+{
+ u32 data;
+
+ /* Dummy read followed by PHY read/write command. */
+ ag7xxx_switch_reg_read(bus, 0x98, &data);
+ data = val | (reg << 16) | (addr << 21) | BIT(30) | BIT(31);
+ ag7xxx_switch_reg_write(bus, 0x98, data);
+
+ /* Wait for operation to finish */
+ do {
+ ag7xxx_switch_reg_read(bus, 0x98, &data);
+ } while (data & BIT(31));
+
+ return data & 0xffff;
+}
+
+static int ag7xxx_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
+{
+ return ag7xxx_mdio_rw(bus, addr, reg, BIT(27));
+}
+
+static int ag7xxx_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
+ u16 val)
+{
+ ag7xxx_mdio_rw(bus, addr, reg, val);
+ return 0;
+}
+
+/*
+ * DMA ring handlers
+ */
+static void ag7xxx_dma_clean_tx(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ struct ag7xxx_dma_desc *curr, *next;
+ u32 start, end;
+ int i;
+
+ for (i = 0; i < CONFIG_TX_DESCR_NUM; i++) {
+ curr = &priv->tx_mac_descrtable[i];
+ next = &priv->tx_mac_descrtable[(i + 1) % CONFIG_TX_DESCR_NUM];
+
+ curr->data_addr = virt_to_phys(&priv->txbuffs[i * CONFIG_ETH_BUFSIZE]);
+ curr->config = AG7XXX_DMADESC_IS_EMPTY;
+ curr->next_desc = virt_to_phys(next);
+ }
+
+ priv->tx_currdescnum = 0;
+
+ /* Cache: Flush descriptors, don't care about buffers. */
+ start = (u32)(&priv->tx_mac_descrtable[0]);
+ end = start + sizeof(priv->tx_mac_descrtable);
+ flush_dcache_range(start, end);
+}
+
+static void ag7xxx_dma_clean_rx(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ struct ag7xxx_dma_desc *curr, *next;
+ u32 start, end;
+ int i;
+
+ for (i = 0; i < CONFIG_RX_DESCR_NUM; i++) {
+ curr = &priv->rx_mac_descrtable[i];
+ next = &priv->rx_mac_descrtable[(i + 1) % CONFIG_RX_DESCR_NUM];
+
+ curr->data_addr = virt_to_phys(&priv->rxbuffs[i * CONFIG_ETH_BUFSIZE]);
+ curr->config = AG7XXX_DMADESC_IS_EMPTY;
+ curr->next_desc = virt_to_phys(next);
+ }
+
+ priv->rx_currdescnum = 0;
+
+ /* Cache: Flush+Invalidate descriptors, Invalidate buffers. */
+ start = (u32)(&priv->rx_mac_descrtable[0]);
+ end = start + sizeof(priv->rx_mac_descrtable);
+ flush_dcache_range(start, end);
+ invalidate_dcache_range(start, end);
+
+ start = (u32)&priv->rxbuffs;
+ end = start + sizeof(priv->rxbuffs);
+ invalidate_dcache_range(start, end);
+}
+
+/*
+ * Ethernet I/O
+ */
+static int ag7xxx_eth_send(struct udevice *dev, void *packet, int length)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ struct ag7xxx_dma_desc *curr;
+ u32 start, end;
+
+ curr = &priv->tx_mac_descrtable[priv->tx_currdescnum];
+
+ /* Cache: Invalidate descriptor. */
+ start = (u32)curr;
+ end = start + sizeof(*curr);
+ invalidate_dcache_range(start, end);
+
+ if (!(curr->config & AG7XXX_DMADESC_IS_EMPTY)) {
+ printf("ag7xxx: Out of TX DMA descriptors!\n");
+ return -EPERM;
+ }
+
+ /* Copy the packet into the data buffer. */
+ memcpy(phys_to_virt(curr->data_addr), packet, length);
+ curr->config = length & AG7XXX_DMADESC_PKT_SIZE_MASK;
+
+ /* Cache: Flush descriptor, Flush buffer. */
+ start = (u32)curr;
+ end = start + sizeof(*curr);
+ flush_dcache_range(start, end);
+ start = (u32)phys_to_virt(curr->data_addr);
+ end = start + length;
+ flush_dcache_range(start, end);
+
+ /* Load the DMA descriptor and start TX DMA. */
+ writel(AG7XXX_ETH_DMA_TX_CTRL_TXE,
+ priv->regs + AG7XXX_ETH_DMA_TX_CTRL);
+
+ /* Switch to next TX descriptor. */
+ priv->tx_currdescnum = (priv->tx_currdescnum + 1) % CONFIG_TX_DESCR_NUM;
+
+ return 0;
+}
+
+static int ag7xxx_eth_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ struct ag7xxx_dma_desc *curr;
+ u32 start, end, length;
+
+ curr = &priv->rx_mac_descrtable[priv->rx_currdescnum];
+
+ /* Cache: Invalidate descriptor. */
+ start = (u32)curr;
+ end = start + sizeof(*curr);
+ invalidate_dcache_range(start, end);
+
+ /* No packets received. */
+ if (curr->config & AG7XXX_DMADESC_IS_EMPTY)
+ return -EAGAIN;
+
+ length = curr->config & AG7XXX_DMADESC_PKT_SIZE_MASK;
+
+ /* Cache: Invalidate buffer. */
+ start = (u32)phys_to_virt(curr->data_addr);
+ end = start + length;
+ invalidate_dcache_range(start, end);
+
+ /* Receive one packet and return length. */
+ *packetp = phys_to_virt(curr->data_addr);
+ return length;
+}
+
+static int ag7xxx_eth_free_pkt(struct udevice *dev, uchar *packet,
+ int length)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ struct ag7xxx_dma_desc *curr;
+ u32 start, end;
+
+ curr = &priv->rx_mac_descrtable[priv->rx_currdescnum];
+
+ curr->config = AG7XXX_DMADESC_IS_EMPTY;
+
+ /* Cache: Flush descriptor. */
+ start = (u32)curr;
+ end = start + sizeof(*curr);
+ flush_dcache_range(start, end);
+
+ /* Switch to next RX descriptor. */
+ priv->rx_currdescnum = (priv->rx_currdescnum + 1) % CONFIG_RX_DESCR_NUM;
+
+ return 0;
+}
+
+static int ag7xxx_eth_start(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+
+ /* FIXME: Check if link up */
+
+ /* Clear the DMA rings. */
+ ag7xxx_dma_clean_tx(dev);
+ ag7xxx_dma_clean_rx(dev);
+
+ /* Load DMA descriptors and start the RX DMA. */
+ writel(virt_to_phys(&priv->tx_mac_descrtable[priv->tx_currdescnum]),
+ priv->regs + AG7XXX_ETH_DMA_TX_DESC);
+ writel(virt_to_phys(&priv->rx_mac_descrtable[priv->rx_currdescnum]),
+ priv->regs + AG7XXX_ETH_DMA_RX_DESC);
+ writel(AG7XXX_ETH_DMA_RX_CTRL_RXE,
+ priv->regs + AG7XXX_ETH_DMA_RX_CTRL);
+
+ return 0;
+}
+
+static void ag7xxx_eth_stop(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+
+ /* Stop the TX DMA. */
+ writel(0, priv->regs + AG7XXX_ETH_DMA_TX_CTRL);
+ wait_for_bit("ag7xxx", priv->regs + AG7XXX_ETH_DMA_TX_CTRL, ~0, 0,
+ 1000, 0);
+
+ /* Stop the RX DMA. */
+ writel(0, priv->regs + AG7XXX_ETH_DMA_RX_CTRL);
+ wait_for_bit("ag7xxx", priv->regs + AG7XXX_ETH_DMA_RX_CTRL, ~0, 0,
+ 1000, 0);
+}
+
+/*
+ * Hardware setup
+ */
+static int ag7xxx_eth_write_hwaddr(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ unsigned char *mac = pdata->enetaddr;
+ u32 macid_lo, macid_hi;
+
+ macid_hi = mac[3] | (mac[2] << 8) | (mac[1] << 16) | (mac[0] << 24);
+ macid_lo = (mac[5] << 16) | (mac[4] << 24);
+
+ writel(macid_lo, priv->regs + AG7XXX_ETH_ADDR1);
+ writel(macid_hi, priv->regs + AG7XXX_ETH_ADDR2);
+
+ return 0;
+}
+
+static void ag7xxx_hw_setup(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ u32 speed;
+
+ setbits_be32(priv->regs + AG7XXX_ETH_CFG1,
+ AG7XXX_ETH_CFG1_RX_RST | AG7XXX_ETH_CFG1_TX_RST |
+ AG7XXX_ETH_CFG1_SOFT_RST);
+
+ mdelay(10);
+
+ writel(AG7XXX_ETH_CFG1_RX_EN | AG7XXX_ETH_CFG1_TX_EN,
+ priv->regs + AG7XXX_ETH_CFG1);
+
+ if (priv->interface == PHY_INTERFACE_MODE_RMII)
+ speed = AG7XXX_ETH_CFG2_IF_10_100;
+ else
+ speed = AG7XXX_ETH_CFG2_IF_1000;
+
+ clrsetbits_be32(priv->regs + AG7XXX_ETH_CFG2,
+ AG7XXX_ETH_CFG2_IF_SPEED_MASK,
+ speed | AG7XXX_ETH_CFG2_PAD_CRC_EN |
+ AG7XXX_ETH_CFG2_LEN_CHECK);
+
+ writel(0xfff0000, priv->regs + AG7XXX_ETH_FIFO_CFG_1);
+ writel(0x1fff, priv->regs + AG7XXX_ETH_FIFO_CFG_2);
+
+ writel(0x1f00, priv->regs + AG7XXX_ETH_FIFO_CFG_0);
+ setbits_be32(priv->regs + AG7XXX_ETH_FIFO_CFG_4, 0x3ffff);
+ writel(0x10ffff, priv->regs + AG7XXX_ETH_FIFO_CFG_1);
+ writel(0xaaa0555, priv->regs + AG7XXX_ETH_FIFO_CFG_2);
+ writel(0x7eccf, priv->regs + AG7XXX_ETH_FIFO_CFG_5);
+ writel(0x1f00140, priv->regs + AG7XXX_ETH_FIFO_CFG_3);
+}
+
+static int ag7xxx_mii_get_div(void)
+{
+ ulong freq = get_bus_freq(0);
+
+ switch (freq / 1000000) {
+ case 150: return 0x7;
+ case 175: return 0x5;
+ case 200: return 0x4;
+ case 210: return 0x9;
+ case 220: return 0x9;
+ default: return 0x7;
+ }
+}
+
+static int ag7xxx_mii_setup(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int i, ret, div = ag7xxx_mii_get_div();
+ u32 reg;
+
+ if (priv->model == AG7XXX_MODEL_AG933X) {
+ /* Unit 0 is PHY-less on AR9331, see datasheet Figure 2-3 */
+ if (priv->interface == PHY_INTERFACE_MODE_RMII)
+ return 0;
+ }
+
+ if (priv->model == AG7XXX_MODEL_AG934X) {
+ writel(AG7XXX_ETH_MII_MGMT_CFG_RESET | 0x4,
+ priv->regs + AG7XXX_ETH_MII_MGMT_CFG);
+ writel(0x4, priv->regs + AG7XXX_ETH_MII_MGMT_CFG);
+ return 0;
+ }
+
+ for (i = 0; i < 10; i++) {
+ writel(AG7XXX_ETH_MII_MGMT_CFG_RESET | div,
+ priv->regs + AG7XXX_ETH_MII_MGMT_CFG);
+ writel(div, priv->regs + AG7XXX_ETH_MII_MGMT_CFG);
+
+ /* Check the switch */
+ ret = ag7xxx_switch_reg_read(priv->bus, 0x10c, &reg);
+ if (ret)
+ continue;
+
+ if (reg != 0x18007fff)
+ continue;
+
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int ag933x_phy_setup_wan(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+
+ /* Configure switch port 4 (GMAC0) */
+ return ag7xxx_mdio_write(priv->bus, 4, 0, MII_BMCR, 0x9000);
+}
+
+static int ag933x_phy_setup_lan(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int i, ret;
+ u32 reg;
+
+ /* Reset the switch */
+ ret = ag7xxx_switch_reg_read(priv->bus, 0, &reg);
+ if (ret)
+ return ret;
+ reg |= BIT(31);
+ ret = ag7xxx_switch_reg_write(priv->bus, 0, reg);
+ if (ret)
+ return ret;
+
+ do {
+ ret = ag7xxx_switch_reg_read(priv->bus, 0, &reg);
+ if (ret)
+ return ret;
+ } while (reg & BIT(31));
+
+ /* Configure switch ports 0...3 (GMAC1) */
+ for (i = 0; i < 4; i++) {
+ ret = ag7xxx_mdio_write(priv->bus, 0x4, 0, MII_BMCR, 0x9000);
+ if (ret)
+ return ret;
+ }
+
+ /* Enable CPU port */
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x78, BIT(8));
+ if (ret)
+ return ret;
+
+ for (i = 0; i < 4; i++) {
+ ret = ag7xxx_switch_reg_write(priv->bus, i * 0x100, BIT(9));
+ if (ret)
+ return ret;
+ }
+
+ /* QM Control */
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x38, 0xc000050e);
+ if (ret)
+ return ret;
+
+ /* Disable Atheros header */
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x104, 0x4004);
+ if (ret)
+ return ret;
+
+ /* Tag priority mapping */
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x70, 0xfa50);
+ if (ret)
+ return ret;
+
+ /* Enable ARP packets to the CPU */
+ ret = ag7xxx_switch_reg_read(priv->bus, 0x5c, &reg);
+ if (ret)
+ return ret;
+ reg |= 0x100000;
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x5c, reg);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ag933x_phy_setup_reset_set(struct udevice *dev, int port)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = ag7xxx_mdio_write(priv->bus, port, 0, MII_ADVERTISE,
+ ADVERTISE_ALL | ADVERTISE_PAUSE_CAP |
+ ADVERTISE_PAUSE_ASYM);
+ if (ret)
+ return ret;
+
+ if (priv->model == AG7XXX_MODEL_AG934X) {
+ ret = ag7xxx_mdio_write(priv->bus, port, 0, MII_CTRL1000,
+ ADVERTISE_1000FULL);
+ if (ret)
+ return ret;
+ }
+
+ return ag7xxx_mdio_write(priv->bus, port, 0, MII_BMCR,
+ BMCR_ANENABLE | BMCR_RESET);
+}
+
+static int ag933x_phy_setup_reset_fin(struct udevice *dev, int port)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ do {
+ ret = ag7xxx_mdio_read(priv->bus, port, 0, MII_BMCR);
+ if (ret < 0)
+ return ret;
+ mdelay(10);
+ } while (ret & BMCR_RESET);
+
+ return 0;
+}
+
+static int ag933x_phy_setup_common(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int i, ret, phymax;
+
+ if (priv->model == AG7XXX_MODEL_AG933X)
+ phymax = 4;
+ else if (priv->model == AG7XXX_MODEL_AG934X)
+ phymax = 5;
+ else
+ return -EINVAL;
+
+ if (priv->interface == PHY_INTERFACE_MODE_RMII) {
+ ret = ag933x_phy_setup_reset_set(dev, phymax);
+ if (ret)
+ return ret;
+
+ ret = ag933x_phy_setup_reset_fin(dev, phymax);
+ if (ret)
+ return ret;
+
+ /* Read out link status */
+ ret = ag7xxx_mdio_read(priv->bus, phymax, 0, MII_MIPSCR);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+ }
+
+ /* Switch ports */
+ for (i = 0; i < phymax; i++) {
+ ret = ag933x_phy_setup_reset_set(dev, i);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < phymax; i++) {
+ ret = ag933x_phy_setup_reset_fin(dev, i);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < phymax; i++) {
+ /* Read out link status */
+ ret = ag7xxx_mdio_read(priv->bus, i, 0, MII_MIPSCR);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ag934x_phy_setup(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int i, ret;
+ u32 reg;
+
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x624, 0x7f7f7f7f);
+ if (ret)
+ return ret;
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x10, 0x40000000);
+ if (ret)
+ return ret;
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x4, 0x07600000);
+ if (ret)
+ return ret;
+ ret = ag7xxx_switch_reg_write(priv->bus, 0xc, 0x01000000);
+ if (ret)
+ return ret;
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x7c, 0x0000007e);
+ if (ret)
+ return ret;
+
+ /* AR8327/AR8328 v1.0 fixup */
+ ret = ag7xxx_switch_reg_read(priv->bus, 0, &reg);
+ if (ret)
+ return ret;
+ if ((reg & 0xffff) == 0x1201) {
+ for (i = 0; i < 5; i++) {
+ ret = ag7xxx_mdio_write(priv->bus, i, 0, 0x1d, 0x0);
+ if (ret)
+ return ret;
+ ret = ag7xxx_mdio_write(priv->bus, i, 0, 0x1e, 0x02ea);
+ if (ret)
+ return ret;
+ ret = ag7xxx_mdio_write(priv->bus, i, 0, 0x1d, 0x3d);
+ if (ret)
+ return ret;
+ ret = ag7xxx_mdio_write(priv->bus, i, 0, 0x1e, 0x68a0);
+ if (ret)
+ return ret;
+ }
+ }
+
+ ret = ag7xxx_switch_reg_read(priv->bus, 0x66c, &reg);
+ if (ret)
+ return ret;
+ reg &= ~0x70000;
+ ret = ag7xxx_switch_reg_write(priv->bus, 0x66c, reg);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ag7xxx_mac_probe(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ag7xxx_hw_setup(dev);
+ ret = ag7xxx_mii_setup(dev);
+ if (ret)
+ return ret;
+
+ ag7xxx_eth_write_hwaddr(dev);
+
+ if (priv->model == AG7XXX_MODEL_AG933X) {
+ if (priv->interface == PHY_INTERFACE_MODE_RMII)
+ ret = ag933x_phy_setup_wan(dev);
+ else
+ ret = ag933x_phy_setup_lan(dev);
+ } else if (priv->model == AG7XXX_MODEL_AG934X) {
+ ret = ag934x_phy_setup(dev);
+ } else {
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ return ag933x_phy_setup_common(dev);
+}
+
+static int ag7xxx_mdio_probe(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ struct mii_dev *bus = mdio_alloc();
+
+ if (!bus)
+ return -ENOMEM;
+
+ bus->read = ag7xxx_mdio_read;
+ bus->write = ag7xxx_mdio_write;
+ snprintf(bus->name, sizeof(bus->name), dev->name);
+
+ bus->priv = (void *)priv;
+
+ return mdio_register(bus);
+}
+
+static int ag7xxx_get_phy_iface_offset(struct udevice *dev)
+{
+ int offset;
+
+ offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, "phy");
+ if (offset <= 0) {
+ debug("%s: PHY OF node not found (ret=%i)\n", __func__, offset);
+ return -EINVAL;
+ }
+
+ offset = fdt_parent_offset(gd->fdt_blob, offset);
+ if (offset <= 0) {
+ debug("%s: PHY OF node parent MDIO bus not found (ret=%i)\n",
+ __func__, offset);
+ return -EINVAL;
+ }
+
+ offset = fdt_parent_offset(gd->fdt_blob, offset);
+ if (offset <= 0) {
+ debug("%s: PHY MDIO OF node parent MAC not found (ret=%i)\n",
+ __func__, offset);
+ return -EINVAL;
+ }
+
+ return offset;
+}
+
+static int ag7xxx_eth_probe(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+ void __iomem *iobase, *phyiobase;
+ int ret, phyreg;
+
+ /* Decoding of convoluted PHY wiring on Atheros MIPS. */
+ ret = ag7xxx_get_phy_iface_offset(dev);
+ if (ret <= 0)
+ return ret;
+ phyreg = fdtdec_get_int(gd->fdt_blob, ret, "reg", -1);
+
+ iobase = map_physmem(pdata->iobase, 0x200, MAP_NOCACHE);
+ phyiobase = map_physmem(phyreg, 0x200, MAP_NOCACHE);
+
+ debug("%s, iobase=%p, phyiobase=%p, priv=%p\n",
+ __func__, iobase, phyiobase, priv);
+ priv->regs = iobase;
+ priv->phyregs = phyiobase;
+ priv->interface = pdata->phy_interface;
+ priv->model = dev_get_driver_data(dev);
+
+ ret = ag7xxx_mdio_probe(dev);
+ if (ret)
+ return ret;
+
+ priv->bus = miiphy_get_dev_by_name(dev->name);
+
+ ret = ag7xxx_mac_probe(dev);
+ debug("%s, ret=%d\n", __func__, ret);
+
+ return ret;
+}
+
+static int ag7xxx_eth_remove(struct udevice *dev)
+{
+ struct ar7xxx_eth_priv *priv = dev_get_priv(dev);
+
+ free(priv->phydev);
+ mdio_unregister(priv->bus);
+ mdio_free(priv->bus);
+
+ return 0;
+}
+
+static const struct eth_ops ag7xxx_eth_ops = {
+ .start = ag7xxx_eth_start,
+ .send = ag7xxx_eth_send,
+ .recv = ag7xxx_eth_recv,
+ .free_pkt = ag7xxx_eth_free_pkt,
+ .stop = ag7xxx_eth_stop,
+ .write_hwaddr = ag7xxx_eth_write_hwaddr,
+};
+
+static int ag7xxx_eth_ofdata_to_platdata(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ const char *phy_mode;
+ int ret;
+
+ pdata->iobase = dev_get_addr(dev);
+ pdata->phy_interface = -1;
+
+ /* Decoding of convoluted PHY wiring on Atheros MIPS. */
+ ret = ag7xxx_get_phy_iface_offset(dev);
+ if (ret <= 0)
+ return ret;
+
+ phy_mode = fdt_getprop(gd->fdt_blob, ret, "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;
+ }
+
+ return 0;
+}
+
+static const struct udevice_id ag7xxx_eth_ids[] = {
+ { .compatible = "qca,ag933x-mac", .data = AG7XXX_MODEL_AG933X },
+ { .compatible = "qca,ag934x-mac", .data = AG7XXX_MODEL_AG934X },
+ { }
+};
+
+U_BOOT_DRIVER(eth_ag7xxx) = {
+ .name = "eth_ag7xxx",
+ .id = UCLASS_ETH,
+ .of_match = ag7xxx_eth_ids,
+ .ofdata_to_platdata = ag7xxx_eth_ofdata_to_platdata,
+ .probe = ag7xxx_eth_probe,
+ .remove = ag7xxx_eth_remove,
+ .ops = &ag7xxx_eth_ops,
+ .priv_auto_alloc_size = sizeof(struct ar7xxx_eth_priv),
+ .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
--
2.7.0