--- /dev/null
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * Portions based on U-Boot's rtl8169.c.
+ */
+
+/*
+ * This driver supports the Synopsys Designware Ethernet QOS (Quality Of
+ * Service) IP block. The IP supports multiple options for bus type, clocking/
+ * reset structure, and feature list.
+ *
+ * The driver is written such that generic core logic is kept separate from
+ * configuration-specific logic. Code that interacts with configuration-
+ * specific resources is split out into separate functions to avoid polluting
+ * common code. If/when this driver is enhanced to support multiple
+ * configurations, the core code should be adapted to call all configuration-
+ * specific functions through function pointers, with the definition of those
+ * function pointers being supplied by struct udevice_id eqos_ids[]'s .data
+ * field.
+ *
+ * The following configurations are currently supported:
+ * tegra186:
+ * NVIDIA's Tegra186 chip. This configuration uses an AXI master/DMA bus, an
+ * AHB slave/register bus, contains the DMA, MTL, and MAC sub-blocks, and
+ * supports a single RGMII PHY. This configuration also has SW control over
+ * all clock and reset signals to the HW block.
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <errno.h>
+#include <memalign.h>
+#include <miiphy.h>
+#include <net.h>
+#include <netdev.h>
+#include <phy.h>
+#include <reset.h>
+#include <wait_bit.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+
+/* Core registers */
+
+#define EQOS_MAC_REGS_BASE 0x000
+struct eqos_mac_regs {
+ uint32_t configuration; /* 0x000 */
+ uint32_t unused_004[(0x070 - 0x004) / 4]; /* 0x004 */
+ uint32_t q0_tx_flow_ctrl; /* 0x070 */
+ uint32_t unused_070[(0x090 - 0x074) / 4]; /* 0x074 */
+ uint32_t rx_flow_ctrl; /* 0x090 */
+ uint32_t unused_094; /* 0x094 */
+ uint32_t txq_prty_map0; /* 0x098 */
+ uint32_t unused_09c; /* 0x09c */
+ uint32_t rxq_ctrl0; /* 0x0a0 */
+ uint32_t unused_0a4; /* 0x0a4 */
+ uint32_t rxq_ctrl2; /* 0x0a8 */
+ uint32_t unused_0ac[(0x0dc - 0x0ac) / 4]; /* 0x0ac */
+ uint32_t us_tic_counter; /* 0x0dc */
+ uint32_t unused_0e0[(0x11c - 0x0e0) / 4]; /* 0x0e0 */
+ uint32_t hw_feature0; /* 0x11c */
+ uint32_t hw_feature1; /* 0x120 */
+ uint32_t hw_feature2; /* 0x124 */
+ uint32_t unused_128[(0x200 - 0x128) / 4]; /* 0x128 */
+ uint32_t mdio_address; /* 0x200 */
+ uint32_t mdio_data; /* 0x204 */
+ uint32_t unused_208[(0x300 - 0x208) / 4]; /* 0x208 */
+ uint32_t address0_high; /* 0x300 */
+ uint32_t address0_low; /* 0x304 */
+};
+
+#define EQOS_MAC_CONFIGURATION_GPSLCE BIT(23)
+#define EQOS_MAC_CONFIGURATION_CST BIT(21)
+#define EQOS_MAC_CONFIGURATION_ACS BIT(20)
+#define EQOS_MAC_CONFIGURATION_WD BIT(19)
+#define EQOS_MAC_CONFIGURATION_JD BIT(17)
+#define EQOS_MAC_CONFIGURATION_JE BIT(16)
+#define EQOS_MAC_CONFIGURATION_PS BIT(15)
+#define EQOS_MAC_CONFIGURATION_FES BIT(14)
+#define EQOS_MAC_CONFIGURATION_DM BIT(13)
+#define EQOS_MAC_CONFIGURATION_TE BIT(1)
+#define EQOS_MAC_CONFIGURATION_RE BIT(0)
+
+#define EQOS_MAC_Q0_TX_FLOW_CTRL_PT_SHIFT 16
+#define EQOS_MAC_Q0_TX_FLOW_CTRL_PT_MASK 0xffff
+#define EQOS_MAC_Q0_TX_FLOW_CTRL_TFE BIT(1)
+
+#define EQOS_MAC_RX_FLOW_CTRL_RFE BIT(0)
+
+#define EQOS_MAC_TXQ_PRTY_MAP0_PSTQ0_SHIFT 0
+#define EQOS_MAC_TXQ_PRTY_MAP0_PSTQ0_MASK 0xff
+
+#define EQOS_MAC_RXQ_CTRL0_RXQ0EN_SHIFT 0
+#define EQOS_MAC_RXQ_CTRL0_RXQ0EN_MASK 3
+#define EQOS_MAC_RXQ_CTRL0_RXQ0EN_NOT_ENABLED 0
+#define EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_DCB 2
+
+#define EQOS_MAC_RXQ_CTRL2_PSRQ0_SHIFT 0
+#define EQOS_MAC_RXQ_CTRL2_PSRQ0_MASK 0xff
+
+#define EQOS_MAC_HW_FEATURE1_TXFIFOSIZE_SHIFT 6
+#define EQOS_MAC_HW_FEATURE1_TXFIFOSIZE_MASK 0x1f
+#define EQOS_MAC_HW_FEATURE1_RXFIFOSIZE_SHIFT 0
+#define EQOS_MAC_HW_FEATURE1_RXFIFOSIZE_MASK 0x1f
+
+#define EQOS_MAC_MDIO_ADDRESS_PA_SHIFT 21
+#define EQOS_MAC_MDIO_ADDRESS_RDA_SHIFT 16
+#define EQOS_MAC_MDIO_ADDRESS_CR_SHIFT 8
+#define EQOS_MAC_MDIO_ADDRESS_CR_20_35 2
+#define EQOS_MAC_MDIO_ADDRESS_SKAP BIT(4)
+#define EQOS_MAC_MDIO_ADDRESS_GOC_SHIFT 2
+#define EQOS_MAC_MDIO_ADDRESS_GOC_READ 3
+#define EQOS_MAC_MDIO_ADDRESS_GOC_WRITE 1
+#define EQOS_MAC_MDIO_ADDRESS_C45E BIT(1)
+#define EQOS_MAC_MDIO_ADDRESS_GB BIT(0)
+
+#define EQOS_MAC_MDIO_DATA_GD_MASK 0xffff
+
+#define EQOS_MTL_REGS_BASE 0xd00
+struct eqos_mtl_regs {
+ uint32_t txq0_operation_mode; /* 0xd00 */
+ uint32_t unused_d04; /* 0xd04 */
+ uint32_t txq0_debug; /* 0xd08 */
+ uint32_t unused_d0c[(0xd18 - 0xd0c) / 4]; /* 0xd0c */
+ uint32_t txq0_quantum_weight; /* 0xd18 */
+ uint32_t unused_d1c[(0xd30 - 0xd1c) / 4]; /* 0xd1c */
+ uint32_t rxq0_operation_mode; /* 0xd30 */
+ uint32_t unused_d34; /* 0xd34 */
+ uint32_t rxq0_debug; /* 0xd38 */
+};
+
+#define EQOS_MTL_TXQ0_OPERATION_MODE_TQS_SHIFT 16
+#define EQOS_MTL_TXQ0_OPERATION_MODE_TQS_MASK 0x1ff
+#define EQOS_MTL_TXQ0_OPERATION_MODE_TXQEN_SHIFT 2
+#define EQOS_MTL_TXQ0_OPERATION_MODE_TXQEN_MASK 3
+#define EQOS_MTL_TXQ0_OPERATION_MODE_TXQEN_ENABLED 2
+#define EQOS_MTL_TXQ0_OPERATION_MODE_TSF BIT(1)
+#define EQOS_MTL_TXQ0_OPERATION_MODE_FTQ BIT(0)
+
+#define EQOS_MTL_TXQ0_DEBUG_TXQSTS BIT(4)
+#define EQOS_MTL_TXQ0_DEBUG_TRCSTS_SHIFT 1
+#define EQOS_MTL_TXQ0_DEBUG_TRCSTS_MASK 3
+
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RQS_SHIFT 20
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RQS_MASK 0x3ff
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RFD_SHIFT 14
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RFD_MASK 0x3f
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RFA_SHIFT 8
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RFA_MASK 0x3f
+#define EQOS_MTL_RXQ0_OPERATION_MODE_EHFC BIT(7)
+#define EQOS_MTL_RXQ0_OPERATION_MODE_RSF BIT(5)
+
+#define EQOS_MTL_RXQ0_DEBUG_PRXQ_SHIFT 16
+#define EQOS_MTL_RXQ0_DEBUG_PRXQ_MASK 0x7fff
+#define EQOS_MTL_RXQ0_DEBUG_RXQSTS_SHIFT 4
+#define EQOS_MTL_RXQ0_DEBUG_RXQSTS_MASK 3
+
+#define EQOS_DMA_REGS_BASE 0x1000
+struct eqos_dma_regs {
+ uint32_t mode; /* 0x1000 */
+ uint32_t sysbus_mode; /* 0x1004 */
+ uint32_t unused_1008[(0x1100 - 0x1008) / 4]; /* 0x1008 */
+ uint32_t ch0_control; /* 0x1100 */
+ uint32_t ch0_tx_control; /* 0x1104 */
+ uint32_t ch0_rx_control; /* 0x1108 */
+ uint32_t unused_110c; /* 0x110c */
+ uint32_t ch0_txdesc_list_haddress; /* 0x1110 */
+ uint32_t ch0_txdesc_list_address; /* 0x1114 */
+ uint32_t ch0_rxdesc_list_haddress; /* 0x1118 */
+ uint32_t ch0_rxdesc_list_address; /* 0x111c */
+ uint32_t ch0_txdesc_tail_pointer; /* 0x1120 */
+ uint32_t unused_1124; /* 0x1124 */
+ uint32_t ch0_rxdesc_tail_pointer; /* 0x1128 */
+ uint32_t ch0_txdesc_ring_length; /* 0x112c */
+ uint32_t ch0_rxdesc_ring_length; /* 0x1130 */
+};
+
+#define EQOS_DMA_MODE_SWR BIT(0)
+
+#define EQOS_DMA_SYSBUS_MODE_RD_OSR_LMT_SHIFT 16
+#define EQOS_DMA_SYSBUS_MODE_RD_OSR_LMT_MASK 0xf
+#define EQOS_DMA_SYSBUS_MODE_EAME BIT(11)
+#define EQOS_DMA_SYSBUS_MODE_BLEN16 BIT(3)
+#define EQOS_DMA_SYSBUS_MODE_BLEN8 BIT(2)
+#define EQOS_DMA_SYSBUS_MODE_BLEN4 BIT(1)
+
+#define EQOS_DMA_CH0_CONTROL_PBLX8 BIT(16)
+
+#define EQOS_DMA_CH0_TX_CONTROL_TXPBL_SHIFT 16
+#define EQOS_DMA_CH0_TX_CONTROL_TXPBL_MASK 0x3f
+#define EQOS_DMA_CH0_TX_CONTROL_OSP BIT(4)
+#define EQOS_DMA_CH0_TX_CONTROL_ST BIT(0)
+
+#define EQOS_DMA_CH0_RX_CONTROL_RXPBL_SHIFT 16
+#define EQOS_DMA_CH0_RX_CONTROL_RXPBL_MASK 0x3f
+#define EQOS_DMA_CH0_RX_CONTROL_RBSZ_SHIFT 1
+#define EQOS_DMA_CH0_RX_CONTROL_RBSZ_MASK 0x3fff
+#define EQOS_DMA_CH0_RX_CONTROL_SR BIT(0)
+
+/* These registers are Tegra186-specific */
+#define EQOS_TEGRA186_REGS_BASE 0x8800
+struct eqos_tegra186_regs {
+ uint32_t sdmemcomppadctrl; /* 0x8800 */
+ uint32_t auto_cal_config; /* 0x8804 */
+ uint32_t unused_8808; /* 0x8808 */
+ uint32_t auto_cal_status; /* 0x880c */
+};
+
+#define EQOS_SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD BIT(31)
+
+#define EQOS_AUTO_CAL_CONFIG_START BIT(31)
+#define EQOS_AUTO_CAL_CONFIG_ENABLE BIT(29)
+
+#define EQOS_AUTO_CAL_STATUS_ACTIVE BIT(31)
+
+/* Descriptors */
+
+#define EQOS_DESCRIPTOR_WORDS 4
+#define EQOS_DESCRIPTOR_SIZE (EQOS_DESCRIPTOR_WORDS * 4)
+/* We assume ARCH_DMA_MINALIGN >= 16; 16 is the EQOS HW minimum */
+#define EQOS_DESCRIPTOR_ALIGN ARCH_DMA_MINALIGN
+#define EQOS_DESCRIPTORS_TX 4
+#define EQOS_DESCRIPTORS_RX 4
+#define EQOS_DESCRIPTORS_NUM (EQOS_DESCRIPTORS_TX + EQOS_DESCRIPTORS_RX)
+#define EQOS_DESCRIPTORS_SIZE ALIGN(EQOS_DESCRIPTORS_NUM * \
+ EQOS_DESCRIPTOR_SIZE, ARCH_DMA_MINALIGN)
+#define EQOS_BUFFER_ALIGN ARCH_DMA_MINALIGN
+#define EQOS_MAX_PACKET_SIZE ALIGN(1568, ARCH_DMA_MINALIGN)
+#define EQOS_RX_BUFFER_SIZE (EQOS_DESCRIPTORS_RX * EQOS_MAX_PACKET_SIZE)
+
+/*
+ * Warn if the cache-line size is larger than the descriptor size. In such
+ * cases the driver will likely fail because the CPU needs to flush the cache
+ * when requeuing RX buffers, therefore descriptors written by the hardware
+ * may be discarded. Architectures with full IO coherence, such as x86, do not
+ * experience this issue, and hence are excluded from this condition.
+ *
+ * This can be fixed by defining CONFIG_SYS_NONCACHED_MEMORY which will cause
+ * the driver to allocate descriptors from a pool of non-cached memory.
+ */
+#if EQOS_DESCRIPTOR_SIZE < ARCH_DMA_MINALIGN
+#if !defined(CONFIG_SYS_NONCACHED_MEMORY) && \
+ !defined(CONFIG_SYS_DCACHE_OFF) && !defined(CONFIG_X86)
+#warning Cache line size is larger than descriptor size
+#endif
+#endif
+
+struct eqos_desc {
+ u32 des0;
+ u32 des1;
+ u32 des2;
+ u32 des3;
+};
+
+#define EQOS_DESC3_OWN BIT(31)
+#define EQOS_DESC3_FD BIT(29)
+#define EQOS_DESC3_LD BIT(28)
+#define EQOS_DESC3_BUF1V BIT(24)
+
+struct eqos_config {
+ bool reg_access_always_ok;
+};
+
+struct eqos_priv {
+ struct udevice *dev;
+ const struct eqos_config *config;
+ fdt_addr_t regs;
+ struct eqos_mac_regs *mac_regs;
+ struct eqos_mtl_regs *mtl_regs;
+ struct eqos_dma_regs *dma_regs;
+ struct eqos_tegra186_regs *tegra186_regs;
+ struct reset_ctl reset_ctl;
+ struct gpio_desc phy_reset_gpio;
+ struct clk clk_master_bus;
+ struct clk clk_rx;
+ struct clk clk_ptp_ref;
+ struct clk clk_tx;
+ struct clk clk_slave_bus;
+ struct mii_dev *mii;
+ struct phy_device *phy;
+ void *descs;
+ struct eqos_desc *tx_descs;
+ struct eqos_desc *rx_descs;
+ int tx_desc_idx, rx_desc_idx;
+ void *tx_dma_buf;
+ void *rx_dma_buf;
+ void *rx_pkt;
+ bool started;
+ bool reg_access_ok;
+};
+
+/*
+ * TX and RX descriptors are 16 bytes. This causes problems with the cache
+ * maintenance on CPUs where the cache-line size exceeds the size of these
+ * descriptors. What will happen is that when the driver receives a packet
+ * it will be immediately requeued for the hardware to reuse. The CPU will
+ * therefore need to flush the cache-line containing the descriptor, which
+ * will cause all other descriptors in the same cache-line to be flushed
+ * along with it. If one of those descriptors had been written to by the
+ * device those changes (and the associated packet) will be lost.
+ *
+ * To work around this, we make use of non-cached memory if available. If
+ * descriptors are mapped uncached there's no need to manually flush them
+ * or invalidate them.
+ *
+ * Note that this only applies to descriptors. The packet data buffers do
+ * not have the same constraints since they are 1536 bytes large, so they
+ * are unlikely to share cache-lines.
+ */
+static void *eqos_alloc_descs(unsigned int num)
+{
+#ifdef CONFIG_SYS_NONCACHED_MEMORY
+ return (void *)noncached_alloc(EQOS_DESCRIPTORS_SIZE,
+ EQOS_DESCRIPTOR_ALIGN);
+#else
+ return memalign(EQOS_DESCRIPTOR_ALIGN, EQOS_DESCRIPTORS_SIZE);
+#endif
+}
+
+static void eqos_free_descs(void *descs)
+{
+#ifdef CONFIG_SYS_NONCACHED_MEMORY
+ /* FIXME: noncached_alloc() has no opposite */
+#else
+ free(descs);
+#endif
+}
+
+static void eqos_inval_desc(void *desc)
+{
+#ifndef CONFIG_SYS_NONCACHED_MEMORY
+ unsigned long start = (unsigned long)desc & ~(ARCH_DMA_MINALIGN - 1);
+ unsigned long end = ALIGN(start + EQOS_DESCRIPTOR_SIZE,
+ ARCH_DMA_MINALIGN);
+
+ invalidate_dcache_range(start, end);
+#endif
+}
+
+static void eqos_flush_desc(void *desc)
+{
+#ifndef CONFIG_SYS_NONCACHED_MEMORY
+ flush_cache((unsigned long)desc, EQOS_DESCRIPTOR_SIZE);
+#endif
+}
+
+static void eqos_inval_buffer(void *buf, size_t size)
+{
+ unsigned long start = (unsigned long)buf & ~(ARCH_DMA_MINALIGN - 1);
+ unsigned long end = ALIGN(start + size, ARCH_DMA_MINALIGN);
+
+ invalidate_dcache_range(start, end);
+}
+
+static void eqos_flush_buffer(void *buf, size_t size)
+{
+ flush_cache((unsigned long)buf, size);
+}
+
+static int eqos_mdio_wait_idle(struct eqos_priv *eqos)
+{
+ return wait_for_bit(__func__, &eqos->mac_regs->mdio_address,
+ EQOS_MAC_MDIO_ADDRESS_GB, false, 1000000, true);
+}
+
+static int eqos_mdio_read(struct mii_dev *bus, int mdio_addr, int mdio_devad,
+ int mdio_reg)
+{
+ struct eqos_priv *eqos = bus->priv;
+ u32 val;
+ int ret;
+
+ debug("%s(dev=%p, addr=%x, reg=%d):\n", __func__, eqos->dev, mdio_addr,
+ mdio_reg);
+
+ ret = eqos_mdio_wait_idle(eqos);
+ if (ret) {
+ error("MDIO not idle at entry");
+ return ret;
+ }
+
+ val = readl(&eqos->mac_regs->mdio_address);
+ val &= EQOS_MAC_MDIO_ADDRESS_SKAP |
+ EQOS_MAC_MDIO_ADDRESS_C45E;
+ val |= (mdio_addr << EQOS_MAC_MDIO_ADDRESS_PA_SHIFT) |
+ (mdio_reg << EQOS_MAC_MDIO_ADDRESS_RDA_SHIFT) |
+ (EQOS_MAC_MDIO_ADDRESS_CR_20_35 <<
+ EQOS_MAC_MDIO_ADDRESS_CR_SHIFT) |
+ (EQOS_MAC_MDIO_ADDRESS_GOC_READ <<
+ EQOS_MAC_MDIO_ADDRESS_GOC_SHIFT) |
+ EQOS_MAC_MDIO_ADDRESS_GB;
+ writel(val, &eqos->mac_regs->mdio_address);
+
+ udelay(10);
+
+ ret = eqos_mdio_wait_idle(eqos);
+ if (ret) {
+ error("MDIO read didn't complete");
+ return ret;
+ }
+
+ val = readl(&eqos->mac_regs->mdio_data);
+ val &= EQOS_MAC_MDIO_DATA_GD_MASK;
+
+ debug("%s: val=%x\n", __func__, val);
+
+ return val;
+}
+
+static int eqos_mdio_write(struct mii_dev *bus, int mdio_addr, int mdio_devad,
+ int mdio_reg, u16 mdio_val)
+{
+ struct eqos_priv *eqos = bus->priv;
+ u32 val;
+ int ret;
+
+ debug("%s(dev=%p, addr=%x, reg=%d, val=%x):\n", __func__, eqos->dev,
+ mdio_addr, mdio_reg, mdio_val);
+
+ ret = eqos_mdio_wait_idle(eqos);
+ if (ret) {
+ error("MDIO not idle at entry");
+ return ret;
+ }
+
+ writel(mdio_val, &eqos->mac_regs->mdio_data);
+
+ val = readl(&eqos->mac_regs->mdio_address);
+ val &= EQOS_MAC_MDIO_ADDRESS_SKAP |
+ EQOS_MAC_MDIO_ADDRESS_C45E;
+ val |= (mdio_addr << EQOS_MAC_MDIO_ADDRESS_PA_SHIFT) |
+ (mdio_reg << EQOS_MAC_MDIO_ADDRESS_RDA_SHIFT) |
+ (EQOS_MAC_MDIO_ADDRESS_CR_20_35 <<
+ EQOS_MAC_MDIO_ADDRESS_CR_SHIFT) |
+ (EQOS_MAC_MDIO_ADDRESS_GOC_WRITE <<
+ EQOS_MAC_MDIO_ADDRESS_GOC_SHIFT) |
+ EQOS_MAC_MDIO_ADDRESS_GB;
+ writel(val, &eqos->mac_regs->mdio_address);
+
+ udelay(10);
+
+ ret = eqos_mdio_wait_idle(eqos);
+ if (ret) {
+ error("MDIO read didn't complete");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int eqos_start_clks_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ ret = clk_enable(&eqos->clk_slave_bus);
+ if (ret < 0) {
+ error("clk_enable(clk_slave_bus) failed: %d", ret);
+ goto err;
+ }
+
+ ret = clk_enable(&eqos->clk_master_bus);
+ if (ret < 0) {
+ error("clk_enable(clk_master_bus) failed: %d", ret);
+ goto err_disable_clk_slave_bus;
+ }
+
+ ret = clk_enable(&eqos->clk_rx);
+ if (ret < 0) {
+ error("clk_enable(clk_rx) failed: %d", ret);
+ goto err_disable_clk_master_bus;
+ }
+
+ ret = clk_enable(&eqos->clk_ptp_ref);
+ if (ret < 0) {
+ error("clk_enable(clk_ptp_ref) failed: %d", ret);
+ goto err_disable_clk_rx;
+ }
+
+ ret = clk_set_rate(&eqos->clk_ptp_ref, 125 * 1000 * 1000);
+ if (ret < 0) {
+ error("clk_set_rate(clk_ptp_ref) failed: %d", ret);
+ goto err_disable_clk_ptp_ref;
+ }
+
+ ret = clk_enable(&eqos->clk_tx);
+ if (ret < 0) {
+ error("clk_enable(clk_tx) failed: %d", ret);
+ goto err_disable_clk_ptp_ref;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+
+err_disable_clk_ptp_ref:
+ clk_disable(&eqos->clk_ptp_ref);
+err_disable_clk_rx:
+ clk_disable(&eqos->clk_rx);
+err_disable_clk_master_bus:
+ clk_disable(&eqos->clk_master_bus);
+err_disable_clk_slave_bus:
+ clk_disable(&eqos->clk_slave_bus);
+err:
+ debug("%s: FAILED: %d\n", __func__, ret);
+ return ret;
+}
+
+void eqos_stop_clks_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clk_disable(&eqos->clk_tx);
+ clk_disable(&eqos->clk_ptp_ref);
+ clk_disable(&eqos->clk_rx);
+ clk_disable(&eqos->clk_master_bus);
+ clk_disable(&eqos->clk_slave_bus);
+
+ debug("%s: OK\n", __func__);
+}
+
+static int eqos_start_resets_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
+ if (ret < 0) {
+ error("dm_gpio_set_value(phy_reset, assert) failed: %d", ret);
+ return ret;
+ }
+
+ udelay(2);
+
+ ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
+ if (ret < 0) {
+ error("dm_gpio_set_value(phy_reset, deassert) failed: %d", ret);
+ return ret;
+ }
+
+ ret = reset_assert(&eqos->reset_ctl);
+ if (ret < 0) {
+ error("reset_assert() failed: %d", ret);
+ return ret;
+ }
+
+ udelay(2);
+
+ ret = reset_deassert(&eqos->reset_ctl);
+ if (ret < 0) {
+ error("reset_deassert() failed: %d", ret);
+ return ret;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static int eqos_stop_resets_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ reset_assert(&eqos->reset_ctl);
+ dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
+
+ return 0;
+}
+
+static int eqos_calibrate_pads_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ setbits_le32(&eqos->tegra186_regs->sdmemcomppadctrl,
+ EQOS_SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD);
+
+ udelay(1);
+
+ setbits_le32(&eqos->tegra186_regs->auto_cal_config,
+ EQOS_AUTO_CAL_CONFIG_START | EQOS_AUTO_CAL_CONFIG_ENABLE);
+
+ ret = wait_for_bit(__func__, &eqos->tegra186_regs->auto_cal_status,
+ EQOS_AUTO_CAL_STATUS_ACTIVE, true, 10, false);
+ if (ret) {
+ error("calibrate didn't start");
+ goto failed;
+ }
+
+ ret = wait_for_bit(__func__, &eqos->tegra186_regs->auto_cal_status,
+ EQOS_AUTO_CAL_STATUS_ACTIVE, false, 10, false);
+ if (ret) {
+ error("calibrate didn't finish");
+ goto failed;
+ }
+
+ ret = 0;
+
+failed:
+ clrbits_le32(&eqos->tegra186_regs->sdmemcomppadctrl,
+ EQOS_SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD);
+
+ debug("%s: returns %d\n", __func__, ret);
+
+ return ret;
+}
+
+static int eqos_disable_calibration_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clrbits_le32(&eqos->tegra186_regs->auto_cal_config,
+ EQOS_AUTO_CAL_CONFIG_ENABLE);
+
+ return 0;
+}
+
+static ulong eqos_get_tick_clk_rate_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ return clk_get_rate(&eqos->clk_slave_bus);
+}
+
+static int eqos_set_full_duplex(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ setbits_le32(&eqos->mac_regs->configuration, EQOS_MAC_CONFIGURATION_DM);
+
+ return 0;
+}
+
+static int eqos_set_half_duplex(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clrbits_le32(&eqos->mac_regs->configuration, EQOS_MAC_CONFIGURATION_DM);
+
+ /* WAR: Flush TX queue when switching to half-duplex */
+ setbits_le32(&eqos->mtl_regs->txq0_operation_mode,
+ EQOS_MTL_TXQ0_OPERATION_MODE_FTQ);
+
+ return 0;
+}
+
+static int eqos_set_gmii_speed(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clrbits_le32(&eqos->mac_regs->configuration,
+ EQOS_MAC_CONFIGURATION_PS | EQOS_MAC_CONFIGURATION_FES);
+
+ return 0;
+}
+
+static int eqos_set_mii_speed_100(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ setbits_le32(&eqos->mac_regs->configuration,
+ EQOS_MAC_CONFIGURATION_PS | EQOS_MAC_CONFIGURATION_FES);
+
+ return 0;
+}
+
+static int eqos_set_mii_speed_10(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clrsetbits_le32(&eqos->mac_regs->configuration,
+ EQOS_MAC_CONFIGURATION_FES, EQOS_MAC_CONFIGURATION_PS);
+
+ return 0;
+}
+
+static int eqos_set_tx_clk_speed_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ ulong rate;
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ switch (eqos->phy->speed) {
+ case SPEED_1000:
+ rate = 125 * 1000 * 1000;
+ break;
+ case SPEED_100:
+ rate = 25 * 1000 * 1000;
+ break;
+ case SPEED_10:
+ rate = 2.5 * 1000 * 1000;
+ break;
+ default:
+ error("invalid speed %d", eqos->phy->speed);
+ return -EINVAL;
+ }
+
+ ret = clk_set_rate(&eqos->clk_tx, rate);
+ if (ret < 0) {
+ error("clk_set_rate(tx_clk, %lu) failed: %d", rate, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int eqos_adjust_link(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+ bool en_calibration;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ if (eqos->phy->duplex)
+ ret = eqos_set_full_duplex(dev);
+ else
+ ret = eqos_set_half_duplex(dev);
+ if (ret < 0) {
+ error("eqos_set_*_duplex() failed: %d", ret);
+ return ret;
+ }
+
+ switch (eqos->phy->speed) {
+ case SPEED_1000:
+ en_calibration = true;
+ ret = eqos_set_gmii_speed(dev);
+ break;
+ case SPEED_100:
+ en_calibration = true;
+ ret = eqos_set_mii_speed_100(dev);
+ break;
+ case SPEED_10:
+ en_calibration = false;
+ ret = eqos_set_mii_speed_10(dev);
+ break;
+ default:
+ error("invalid speed %d", eqos->phy->speed);
+ return -EINVAL;
+ }
+ if (ret < 0) {
+ error("eqos_set_*mii_speed*() failed: %d", ret);
+ return ret;
+ }
+
+ if (en_calibration) {
+ ret = eqos_calibrate_pads_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_calibrate_pads_tegra186() failed: %d", ret);
+ return ret;
+ }
+ } else {
+ ret = eqos_disable_calibration_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_disable_calibration_tegra186() failed: %d",
+ ret);
+ return ret;
+ }
+ }
+
+ ret = eqos_set_tx_clk_speed_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_set_tx_clk_speed_tegra186() failed: %d", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int eqos_write_hwaddr(struct udevice *dev)
+{
+ struct eth_pdata *plat = dev_get_platdata(dev);
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ uint32_t val;
+
+ /*
+ * This function may be called before start() or after stop(). At that
+ * time, on at least some configurations of the EQoS HW, all clocks to
+ * the EQoS HW block will be stopped, and a reset signal applied. If
+ * any register access is attempted in this state, bus timeouts or CPU
+ * hangs may occur. This check prevents that.
+ *
+ * A simple solution to this problem would be to not implement
+ * write_hwaddr(), since start() always writes the MAC address into HW
+ * anyway. However, it is desirable to implement write_hwaddr() to
+ * support the case of SW that runs subsequent to U-Boot which expects
+ * the MAC address to already be programmed into the EQoS registers,
+ * which must happen irrespective of whether the U-Boot user (or
+ * scripts) actually made use of the EQoS device, and hence
+ * irrespective of whether start() was ever called.
+ *
+ * Note that this requirement by subsequent SW is not valid for
+ * Tegra186, and is likely not valid for any non-PCI instantiation of
+ * the EQoS HW block. This function is implemented solely as
+ * future-proofing with the expectation the driver will eventually be
+ * ported to some system where the expectation above is true.
+ */
+ if (!eqos->config->reg_access_always_ok && !eqos->reg_access_ok)
+ return 0;
+
+ /* Update the MAC address */
+ val = (plat->enetaddr[5] << 8) |
+ (plat->enetaddr[4]);
+ writel(val, &eqos->mac_regs->address0_high);
+ val = (plat->enetaddr[3] << 24) |
+ (plat->enetaddr[2] << 16) |
+ (plat->enetaddr[1] << 8) |
+ (plat->enetaddr[0]);
+ writel(val, &eqos->mac_regs->address0_low);
+
+ return 0;
+}
+
+static int eqos_start(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret, i;
+ ulong rate;
+ u32 val, tx_fifo_sz, rx_fifo_sz, tqs, rqs, pbl;
+ ulong last_rx_desc;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ eqos->tx_desc_idx = 0;
+ eqos->rx_desc_idx = 0;
+
+ ret = eqos_start_clks_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_start_clks_tegra186() failed: %d", ret);
+ goto err;
+ }
+
+ ret = eqos_start_resets_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_start_resets_tegra186() failed: %d", ret);
+ goto err_stop_clks;
+ }
+
+ udelay(10);
+
+ eqos->reg_access_ok = true;
+
+ ret = wait_for_bit(__func__, &eqos->dma_regs->mode,
+ EQOS_DMA_MODE_SWR, false, 10, false);
+ if (ret) {
+ error("EQOS_DMA_MODE_SWR stuck");
+ goto err_stop_resets;
+ }
+
+ ret = eqos_calibrate_pads_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_calibrate_pads_tegra186() failed: %d", ret);
+ goto err_stop_resets;
+ }
+
+ rate = eqos_get_tick_clk_rate_tegra186(dev);
+ val = (rate / 1000000) - 1;
+ writel(val, &eqos->mac_regs->us_tic_counter);
+
+ eqos->phy = phy_connect(eqos->mii, 0, dev, 0);
+ if (!eqos->phy) {
+ error("phy_connect() failed");
+ goto err_stop_resets;
+ }
+ ret = phy_config(eqos->phy);
+ if (ret < 0) {
+ error("phy_config() failed: %d", ret);
+ goto err_shutdown_phy;
+ }
+ ret = phy_startup(eqos->phy);
+ if (ret < 0) {
+ error("phy_startup() failed: %d", ret);
+ goto err_shutdown_phy;
+ }
+
+ if (!eqos->phy->link) {
+ error("No link");
+ goto err_shutdown_phy;
+ }
+
+ ret = eqos_adjust_link(dev);
+ if (ret < 0) {
+ error("eqos_adjust_link() failed: %d", ret);
+ goto err_shutdown_phy;
+ }
+
+ /* Configure MTL */
+
+ /* Enable Store and Forward mode for TX */
+ /* Program Tx operating mode */
+ setbits_le32(&eqos->mtl_regs->txq0_operation_mode,
+ EQOS_MTL_TXQ0_OPERATION_MODE_TSF |
+ (EQOS_MTL_TXQ0_OPERATION_MODE_TXQEN_ENABLED <<
+ EQOS_MTL_TXQ0_OPERATION_MODE_TXQEN_SHIFT));
+
+ /* Transmit Queue weight */
+ writel(0x10, &eqos->mtl_regs->txq0_quantum_weight);
+
+ /* Enable Store and Forward mode for RX, since no jumbo frame */
+ setbits_le32(&eqos->mtl_regs->rxq0_operation_mode,
+ EQOS_MTL_RXQ0_OPERATION_MODE_RSF);
+
+ /* Transmit/Receive queue fifo size; use all RAM for 1 queue */
+ val = readl(&eqos->mac_regs->hw_feature1);
+ tx_fifo_sz = (val >> EQOS_MAC_HW_FEATURE1_TXFIFOSIZE_SHIFT) &
+ EQOS_MAC_HW_FEATURE1_TXFIFOSIZE_MASK;
+ rx_fifo_sz = (val >> EQOS_MAC_HW_FEATURE1_RXFIFOSIZE_SHIFT) &
+ EQOS_MAC_HW_FEATURE1_RXFIFOSIZE_MASK;
+
+ /*
+ * r/tx_fifo_sz is encoded as log2(n / 128). Undo that by shifting.
+ * r/tqs is encoded as (n / 256) - 1.
+ */
+ tqs = (128 << tx_fifo_sz) / 256 - 1;
+ rqs = (128 << rx_fifo_sz) / 256 - 1;
+
+ clrsetbits_le32(&eqos->mtl_regs->txq0_operation_mode,
+ EQOS_MTL_TXQ0_OPERATION_MODE_TQS_MASK <<
+ EQOS_MTL_TXQ0_OPERATION_MODE_TQS_SHIFT,
+ tqs << EQOS_MTL_TXQ0_OPERATION_MODE_TQS_SHIFT);
+ clrsetbits_le32(&eqos->mtl_regs->rxq0_operation_mode,
+ EQOS_MTL_RXQ0_OPERATION_MODE_RQS_MASK <<
+ EQOS_MTL_RXQ0_OPERATION_MODE_RQS_SHIFT,
+ rqs << EQOS_MTL_RXQ0_OPERATION_MODE_RQS_SHIFT);
+
+ /* Flow control used only if each channel gets 4KB or more FIFO */
+ if (rqs >= ((4096 / 256) - 1)) {
+ u32 rfd, rfa;
+
+ setbits_le32(&eqos->mtl_regs->rxq0_operation_mode,
+ EQOS_MTL_RXQ0_OPERATION_MODE_EHFC);
+
+ /*
+ * Set Threshold for Activating Flow Contol space for min 2
+ * frames ie, (1500 * 1) = 1500 bytes.
+ *
+ * Set Threshold for Deactivating Flow Contol for space of
+ * min 1 frame (frame size 1500bytes) in receive fifo
+ */
+ if (rqs == ((4096 / 256) - 1)) {
+ /*
+ * This violates the above formula because of FIFO size
+ * limit therefore overflow may occur inspite of this.
+ */
+ rfd = 0x3; /* Full-3K */
+ rfa = 0x1; /* Full-1.5K */
+ } else if (rqs == ((8192 / 256) - 1)) {
+ rfd = 0x6; /* Full-4K */
+ rfa = 0xa; /* Full-6K */
+ } else if (rqs == ((16384 / 256) - 1)) {
+ rfd = 0x6; /* Full-4K */
+ rfa = 0x12; /* Full-10K */
+ } else {
+ rfd = 0x6; /* Full-4K */
+ rfa = 0x1E; /* Full-16K */
+ }
+
+ clrsetbits_le32(&eqos->mtl_regs->rxq0_operation_mode,
+ (EQOS_MTL_RXQ0_OPERATION_MODE_RFD_MASK <<
+ EQOS_MTL_RXQ0_OPERATION_MODE_RFD_SHIFT) |
+ (EQOS_MTL_RXQ0_OPERATION_MODE_RFA_MASK <<
+ EQOS_MTL_RXQ0_OPERATION_MODE_RFA_SHIFT),
+ (rfd <<
+ EQOS_MTL_RXQ0_OPERATION_MODE_RFD_SHIFT) |
+ (rfa <<
+ EQOS_MTL_RXQ0_OPERATION_MODE_RFA_SHIFT));
+ }
+
+ /* Configure MAC */
+
+ clrsetbits_le32(&eqos->mac_regs->rxq_ctrl0,
+ EQOS_MAC_RXQ_CTRL0_RXQ0EN_MASK <<
+ EQOS_MAC_RXQ_CTRL0_RXQ0EN_SHIFT,
+ EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_DCB <<
+ EQOS_MAC_RXQ_CTRL0_RXQ0EN_SHIFT);
+
+ /* Set TX flow control parameters */
+ /* Set Pause Time */
+ setbits_le32(&eqos->mac_regs->q0_tx_flow_ctrl,
+ 0xffff << EQOS_MAC_Q0_TX_FLOW_CTRL_PT_SHIFT);
+ /* Assign priority for TX flow control */
+ clrbits_le32(&eqos->mac_regs->txq_prty_map0,
+ EQOS_MAC_TXQ_PRTY_MAP0_PSTQ0_MASK <<
+ EQOS_MAC_TXQ_PRTY_MAP0_PSTQ0_SHIFT);
+ /* Assign priority for RX flow control */
+ clrbits_le32(&eqos->mac_regs->rxq_ctrl2,
+ EQOS_MAC_RXQ_CTRL2_PSRQ0_MASK <<
+ EQOS_MAC_RXQ_CTRL2_PSRQ0_SHIFT);
+ /* Enable flow control */
+ setbits_le32(&eqos->mac_regs->q0_tx_flow_ctrl,
+ EQOS_MAC_Q0_TX_FLOW_CTRL_TFE);
+ setbits_le32(&eqos->mac_regs->rx_flow_ctrl,
+ EQOS_MAC_RX_FLOW_CTRL_RFE);
+
+ clrsetbits_le32(&eqos->mac_regs->configuration,
+ EQOS_MAC_CONFIGURATION_GPSLCE |
+ EQOS_MAC_CONFIGURATION_WD |
+ EQOS_MAC_CONFIGURATION_JD |
+ EQOS_MAC_CONFIGURATION_JE,
+ EQOS_MAC_CONFIGURATION_CST |
+ EQOS_MAC_CONFIGURATION_ACS);
+
+ eqos_write_hwaddr(dev);
+
+ /* Configure DMA */
+
+ /* Enable OSP mode */
+ setbits_le32(&eqos->dma_regs->ch0_tx_control,
+ EQOS_DMA_CH0_TX_CONTROL_OSP);
+
+ /* RX buffer size. Must be a multiple of bus width */
+ clrsetbits_le32(&eqos->dma_regs->ch0_rx_control,
+ EQOS_DMA_CH0_RX_CONTROL_RBSZ_MASK <<
+ EQOS_DMA_CH0_RX_CONTROL_RBSZ_SHIFT,
+ EQOS_MAX_PACKET_SIZE <<
+ EQOS_DMA_CH0_RX_CONTROL_RBSZ_SHIFT);
+
+ setbits_le32(&eqos->dma_regs->ch0_control,
+ EQOS_DMA_CH0_CONTROL_PBLX8);
+
+ /*
+ * Burst length must be < 1/2 FIFO size.
+ * FIFO size in tqs is encoded as (n / 256) - 1.
+ * Each burst is n * 8 (PBLX8) * 16 (AXI width) == 128 bytes.
+ * Half of n * 256 is n * 128, so pbl == tqs, modulo the -1.
+ */
+ pbl = tqs + 1;
+ if (pbl > 32)
+ pbl = 32;
+ clrsetbits_le32(&eqos->dma_regs->ch0_tx_control,
+ EQOS_DMA_CH0_TX_CONTROL_TXPBL_MASK <<
+ EQOS_DMA_CH0_TX_CONTROL_TXPBL_SHIFT,
+ pbl << EQOS_DMA_CH0_TX_CONTROL_TXPBL_SHIFT);
+
+ clrsetbits_le32(&eqos->dma_regs->ch0_rx_control,
+ EQOS_DMA_CH0_RX_CONTROL_RXPBL_MASK <<
+ EQOS_DMA_CH0_RX_CONTROL_RXPBL_SHIFT,
+ 8 << EQOS_DMA_CH0_RX_CONTROL_RXPBL_SHIFT);
+
+ /* DMA performance configuration */
+ val = (2 << EQOS_DMA_SYSBUS_MODE_RD_OSR_LMT_SHIFT) |
+ EQOS_DMA_SYSBUS_MODE_EAME | EQOS_DMA_SYSBUS_MODE_BLEN16 |
+ EQOS_DMA_SYSBUS_MODE_BLEN8 | EQOS_DMA_SYSBUS_MODE_BLEN4;
+ writel(val, &eqos->dma_regs->sysbus_mode);
+
+ /* Set up descriptors */
+
+ memset(eqos->descs, 0, EQOS_DESCRIPTORS_SIZE);
+ for (i = 0; i < EQOS_DESCRIPTORS_RX; i++) {
+ struct eqos_desc *rx_desc = &(eqos->rx_descs[i]);
+ rx_desc->des0 = (u32)(ulong)(eqos->rx_dma_buf +
+ (i * EQOS_MAX_PACKET_SIZE));
+ rx_desc->des3 |= EQOS_DESC3_OWN | EQOS_DESC3_BUF1V;
+ }
+ flush_cache((unsigned long)eqos->descs, EQOS_DESCRIPTORS_SIZE);
+
+ writel(0, &eqos->dma_regs->ch0_txdesc_list_haddress);
+ writel((ulong)eqos->tx_descs, &eqos->dma_regs->ch0_txdesc_list_address);
+ writel(EQOS_DESCRIPTORS_TX - 1,
+ &eqos->dma_regs->ch0_txdesc_ring_length);
+
+ writel(0, &eqos->dma_regs->ch0_rxdesc_list_haddress);
+ writel((ulong)eqos->rx_descs, &eqos->dma_regs->ch0_rxdesc_list_address);
+ writel(EQOS_DESCRIPTORS_RX - 1,
+ &eqos->dma_regs->ch0_rxdesc_ring_length);
+
+ /* Enable everything */
+
+ setbits_le32(&eqos->mac_regs->configuration,
+ EQOS_MAC_CONFIGURATION_TE | EQOS_MAC_CONFIGURATION_RE);
+
+ setbits_le32(&eqos->dma_regs->ch0_tx_control,
+ EQOS_DMA_CH0_TX_CONTROL_ST);
+ setbits_le32(&eqos->dma_regs->ch0_rx_control,
+ EQOS_DMA_CH0_RX_CONTROL_SR);
+
+ /* TX tail pointer not written until we need to TX a packet */
+ /*
+ * Point RX tail pointer at last descriptor. Ideally, we'd point at the
+ * first descriptor, implying all descriptors were available. However,
+ * that's not distinguishable from none of the descriptors being
+ * available.
+ */
+ last_rx_desc = (ulong)&(eqos->rx_descs[(EQOS_DESCRIPTORS_RX - 1)]);
+ writel(last_rx_desc, &eqos->dma_regs->ch0_rxdesc_tail_pointer);
+
+ eqos->started = true;
+
+ debug("%s: OK\n", __func__);
+ return 0;
+
+err_shutdown_phy:
+ phy_shutdown(eqos->phy);
+ eqos->phy = NULL;
+err_stop_resets:
+ eqos_stop_resets_tegra186(dev);
+err_stop_clks:
+ eqos_stop_clks_tegra186(dev);
+err:
+ error("FAILED: %d", ret);
+ return ret;
+}
+
+void eqos_stop(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int i;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ if (!eqos->started)
+ return;
+ eqos->started = false;
+ eqos->reg_access_ok = false;
+
+ /* Disable TX DMA */
+ clrbits_le32(&eqos->dma_regs->ch0_tx_control,
+ EQOS_DMA_CH0_TX_CONTROL_ST);
+
+ /* Wait for TX all packets to drain out of MTL */
+ for (i = 0; i < 1000000; i++) {
+ u32 val = readl(&eqos->mtl_regs->txq0_debug);
+ u32 trcsts = (val >> EQOS_MTL_TXQ0_DEBUG_TRCSTS_SHIFT) &
+ EQOS_MTL_TXQ0_DEBUG_TRCSTS_MASK;
+ u32 txqsts = val & EQOS_MTL_TXQ0_DEBUG_TXQSTS;
+ if ((trcsts != 1) && (!txqsts))
+ break;
+ }
+
+ /* Turn off MAC TX and RX */
+ clrbits_le32(&eqos->mac_regs->configuration,
+ EQOS_MAC_CONFIGURATION_TE | EQOS_MAC_CONFIGURATION_RE);
+
+ /* Wait for all RX packets to drain out of MTL */
+ for (i = 0; i < 1000000; i++) {
+ u32 val = readl(&eqos->mtl_regs->rxq0_debug);
+ u32 prxq = (val >> EQOS_MTL_RXQ0_DEBUG_PRXQ_SHIFT) &
+ EQOS_MTL_RXQ0_DEBUG_PRXQ_MASK;
+ u32 rxqsts = (val >> EQOS_MTL_RXQ0_DEBUG_RXQSTS_SHIFT) &
+ EQOS_MTL_RXQ0_DEBUG_RXQSTS_MASK;
+ if ((!prxq) && (!rxqsts))
+ break;
+ }
+
+ /* Turn off RX DMA */
+ clrbits_le32(&eqos->dma_regs->ch0_rx_control,
+ EQOS_DMA_CH0_RX_CONTROL_SR);
+
+ if (eqos->phy) {
+ phy_shutdown(eqos->phy);
+ eqos->phy = NULL;
+ }
+ eqos_stop_resets_tegra186(dev);
+ eqos_stop_clks_tegra186(dev);
+
+ debug("%s: OK\n", __func__);
+}
+
+int eqos_send(struct udevice *dev, void *packet, int length)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ struct eqos_desc *tx_desc;
+ int i;
+
+ debug("%s(dev=%p, packet=%p, length=%d):\n", __func__, dev, packet,
+ length);
+
+ memcpy(eqos->tx_dma_buf, packet, length);
+ eqos_flush_buffer(eqos->tx_dma_buf, length);
+
+ tx_desc = &(eqos->tx_descs[eqos->tx_desc_idx]);
+ eqos->tx_desc_idx++;
+ eqos->tx_desc_idx %= EQOS_DESCRIPTORS_TX;
+
+ tx_desc->des0 = (ulong)eqos->tx_dma_buf;
+ tx_desc->des1 = 0;
+ tx_desc->des2 = length;
+ /*
+ * Make sure that if HW sees the _OWN write below, it will see all the
+ * writes to the rest of the descriptor too.
+ */
+ mb();
+ tx_desc->des3 = EQOS_DESC3_OWN | EQOS_DESC3_FD | EQOS_DESC3_LD | length;
+ eqos_flush_desc(tx_desc);
+
+ writel((ulong)(tx_desc + 1), &eqos->dma_regs->ch0_txdesc_tail_pointer);
+
+ for (i = 0; i < 1000000; i++) {
+ eqos_inval_desc(tx_desc);
+ if (!(readl(&tx_desc->des3) & EQOS_DESC3_OWN))
+ return 0;
+ udelay(1);
+ }
+
+ debug("%s: TX timeout\n", __func__);
+
+ return -ETIMEDOUT;
+}
+
+int eqos_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ struct eqos_desc *rx_desc;
+ int length;
+
+ debug("%s(dev=%p, flags=%x):\n", __func__, dev, flags);
+
+ rx_desc = &(eqos->rx_descs[eqos->rx_desc_idx]);
+ if (rx_desc->des3 & EQOS_DESC3_OWN) {
+ debug("%s: RX packet not available\n", __func__);
+ return -EAGAIN;
+ }
+
+ *packetp = eqos->rx_dma_buf +
+ (eqos->rx_desc_idx * EQOS_MAX_PACKET_SIZE);
+ length = rx_desc->des3 & 0x7fff;
+ debug("%s: *packetp=%p, length=%d\n", __func__, *packetp, length);
+
+ eqos_inval_buffer(*packetp, length);
+
+ return length;
+}
+
+int eqos_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ uchar *packet_expected;
+ struct eqos_desc *rx_desc;
+
+ debug("%s(packet=%p, length=%d)\n", __func__, packet, length);
+
+ packet_expected = eqos->rx_dma_buf +
+ (eqos->rx_desc_idx * EQOS_MAX_PACKET_SIZE);
+ if (packet != packet_expected) {
+ debug("%s: Unexpected packet (expected %p)\n", __func__,
+ packet_expected);
+ return -EINVAL;
+ }
+
+ rx_desc = &(eqos->rx_descs[eqos->rx_desc_idx]);
+ rx_desc->des0 = (u32)(ulong)packet;
+ rx_desc->des1 = 0;
+ rx_desc->des2 = 0;
+ /*
+ * Make sure that if HW sees the _OWN write below, it will see all the
+ * writes to the rest of the descriptor too.
+ */
+ mb();
+ rx_desc->des3 |= EQOS_DESC3_OWN | EQOS_DESC3_BUF1V;
+ eqos_flush_desc(rx_desc);
+
+ writel((ulong)rx_desc, &eqos->dma_regs->ch0_rxdesc_tail_pointer);
+
+ eqos->rx_desc_idx++;
+ eqos->rx_desc_idx %= EQOS_DESCRIPTORS_RX;
+
+ return 0;
+}
+
+static int eqos_probe_resources_core(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ eqos->descs = eqos_alloc_descs(EQOS_DESCRIPTORS_TX +
+ EQOS_DESCRIPTORS_RX);
+ if (!eqos->descs) {
+ debug("%s: eqos_alloc_descs() failed\n", __func__);
+ ret = -ENOMEM;
+ goto err;
+ }
+ eqos->tx_descs = (struct eqos_desc *)eqos->descs;
+ eqos->rx_descs = (eqos->tx_descs + EQOS_DESCRIPTORS_TX);
+ debug("%s: tx_descs=%p, rx_descs=%p\n", __func__, eqos->tx_descs,
+ eqos->rx_descs);
+
+ eqos->tx_dma_buf = memalign(EQOS_BUFFER_ALIGN, EQOS_MAX_PACKET_SIZE);
+ if (!eqos->tx_dma_buf) {
+ debug("%s: memalign(tx_dma_buf) failed\n", __func__);
+ ret = -ENOMEM;
+ goto err_free_descs;
+ }
+ debug("%s: rx_dma_buf=%p\n", __func__, eqos->rx_dma_buf);
+
+ eqos->rx_dma_buf = memalign(EQOS_BUFFER_ALIGN, EQOS_RX_BUFFER_SIZE);
+ if (!eqos->rx_dma_buf) {
+ debug("%s: memalign(rx_dma_buf) failed\n", __func__);
+ ret = -ENOMEM;
+ goto err_free_tx_dma_buf;
+ }
+ debug("%s: tx_dma_buf=%p\n", __func__, eqos->tx_dma_buf);
+
+ eqos->rx_pkt = malloc(EQOS_MAX_PACKET_SIZE);
+ if (!eqos->rx_pkt) {
+ debug("%s: malloc(rx_pkt) failed\n", __func__);
+ ret = -ENOMEM;
+ goto err_free_rx_dma_buf;
+ }
+ debug("%s: rx_pkt=%p\n", __func__, eqos->rx_pkt);
+
+ debug("%s: OK\n", __func__);
+ return 0;
+
+err_free_rx_dma_buf:
+ free(eqos->rx_dma_buf);
+err_free_tx_dma_buf:
+ free(eqos->tx_dma_buf);
+err_free_descs:
+ eqos_free_descs(eqos->descs);
+err:
+
+ debug("%s: returns %d\n", __func__, ret);
+ return ret;
+}
+
+static int eqos_remove_resources_core(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ free(eqos->rx_pkt);
+ free(eqos->rx_dma_buf);
+ free(eqos->tx_dma_buf);
+ eqos_free_descs(eqos->descs);
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static int eqos_probe_resources_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ ret = reset_get_by_name(dev, "eqos", &eqos->reset_ctl);
+ if (ret) {
+ error("reset_get_by_name(rst) failed: %d", ret);
+ return ret;
+ }
+
+ ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
+ &eqos->phy_reset_gpio,
+ GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
+ if (ret) {
+ error("gpio_request_by_name(phy reset) failed: %d", ret);
+ goto err_free_reset_eqos;
+ }
+
+ ret = clk_get_by_name(dev, "slave_bus", &eqos->clk_slave_bus);
+ if (ret) {
+ error("clk_get_by_name(slave_bus) failed: %d", ret);
+ goto err_free_gpio_phy_reset;
+ }
+
+ ret = clk_get_by_name(dev, "master_bus", &eqos->clk_master_bus);
+ if (ret) {
+ error("clk_get_by_name(master_bus) failed: %d", ret);
+ goto err_free_clk_slave_bus;
+ }
+
+ ret = clk_get_by_name(dev, "rx", &eqos->clk_rx);
+ if (ret) {
+ error("clk_get_by_name(rx) failed: %d", ret);
+ goto err_free_clk_master_bus;
+ }
+
+ ret = clk_get_by_name(dev, "ptp_ref", &eqos->clk_ptp_ref);
+ if (ret) {
+ error("clk_get_by_name(ptp_ref) failed: %d", ret);
+ goto err_free_clk_rx;
+ return ret;
+ }
+
+ ret = clk_get_by_name(dev, "tx", &eqos->clk_tx);
+ if (ret) {
+ error("clk_get_by_name(tx) failed: %d", ret);
+ goto err_free_clk_ptp_ref;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+
+err_free_clk_ptp_ref:
+ clk_free(&eqos->clk_ptp_ref);
+err_free_clk_rx:
+ clk_free(&eqos->clk_rx);
+err_free_clk_master_bus:
+ clk_free(&eqos->clk_master_bus);
+err_free_clk_slave_bus:
+ clk_free(&eqos->clk_slave_bus);
+err_free_gpio_phy_reset:
+ dm_gpio_free(dev, &eqos->phy_reset_gpio);
+err_free_reset_eqos:
+ reset_free(&eqos->reset_ctl);
+
+ debug("%s: returns %d\n", __func__, ret);
+ return ret;
+}
+
+static int eqos_remove_resources_tegra186(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clk_free(&eqos->clk_tx);
+ clk_free(&eqos->clk_ptp_ref);
+ clk_free(&eqos->clk_rx);
+ clk_free(&eqos->clk_slave_bus);
+ clk_free(&eqos->clk_master_bus);
+ dm_gpio_free(dev, &eqos->phy_reset_gpio);
+ reset_free(&eqos->reset_ctl);
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static int eqos_probe(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ eqos->dev = dev;
+ eqos->config = (void *)dev_get_driver_data(dev);
+
+ eqos->regs = dev_get_addr(dev);
+ if (eqos->regs == FDT_ADDR_T_NONE) {
+ error("dev_get_addr() failed");
+ return -ENODEV;
+ }
+ eqos->mac_regs = (void *)(eqos->regs + EQOS_MAC_REGS_BASE);
+ eqos->mtl_regs = (void *)(eqos->regs + EQOS_MTL_REGS_BASE);
+ eqos->dma_regs = (void *)(eqos->regs + EQOS_DMA_REGS_BASE);
+ eqos->tegra186_regs = (void *)(eqos->regs + EQOS_TEGRA186_REGS_BASE);
+
+ ret = eqos_probe_resources_core(dev);
+ if (ret < 0) {
+ error("eqos_probe_resources_core() failed: %d", ret);
+ return ret;
+ }
+
+ ret = eqos_probe_resources_tegra186(dev);
+ if (ret < 0) {
+ error("eqos_probe_resources_tegra186() failed: %d", ret);
+ goto err_remove_resources_core;
+ }
+
+ eqos->mii = mdio_alloc();
+ if (!eqos->mii) {
+ error("mdio_alloc() failed");
+ goto err_remove_resources_tegra;
+ }
+ eqos->mii->read = eqos_mdio_read;
+ eqos->mii->write = eqos_mdio_write;
+ eqos->mii->priv = eqos;
+ strcpy(eqos->mii->name, dev->name);
+
+ ret = mdio_register(eqos->mii);
+ if (ret < 0) {
+ error("mdio_register() failed: %d", ret);
+ goto err_free_mdio;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+
+err_free_mdio:
+ mdio_free(eqos->mii);
+err_remove_resources_tegra:
+ eqos_remove_resources_tegra186(dev);
+err_remove_resources_core:
+ eqos_remove_resources_core(dev);
+
+ debug("%s: returns %d\n", __func__, ret);
+ return ret;
+}
+
+static int eqos_remove(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ mdio_unregister(eqos->mii);
+ mdio_free(eqos->mii);
+ eqos_remove_resources_tegra186(dev);
+ eqos_probe_resources_core(dev);
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static const struct eth_ops eqos_ops = {
+ .start = eqos_start,
+ .stop = eqos_stop,
+ .send = eqos_send,
+ .recv = eqos_recv,
+ .free_pkt = eqos_free_pkt,
+ .write_hwaddr = eqos_write_hwaddr,
+};
+
+static const struct eqos_config eqos_tegra186_config = {
+ .reg_access_always_ok = false,
+};
+
+static const struct udevice_id eqos_ids[] = {
+ {
+ .compatible = "nvidia,tegra186-eqos",
+ .data = (ulong)&eqos_tegra186_config
+ },
+ { }
+};
+
+U_BOOT_DRIVER(eth_eqos) = {
+ .name = "eth_eqos",
+ .id = UCLASS_ETH,
+ .of_match = eqos_ids,
+ .probe = eqos_probe,
+ .remove = eqos_remove,
+ .ops = &eqos_ops,
+ .priv_auto_alloc_size = sizeof(struct eqos_priv),
+ .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+};
projects / u-boot / commitdiff