[PATCH v2 08/14] net: dwc_eth_qos: Add Qcom ethernet driver glue layer

Sumit Garg
2023-02-01T14:06:24Z

The Qualcom ETHQOS hardware supports an RGMII macro which needs to be
configured according to following link speeds:
- SPEED_1000
- SPEED_100
- SPEED_10

So add a corresponding glue driver to configure RGMII macro.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---
drivers/net/Kconfig | 7 +
drivers/net/Makefile | 1 +
drivers/net/dwc_eth_qos.c | 7 +
drivers/net/dwc_eth_qos.h | 3 +
drivers/net/dwc_eth_qos_qcom.c | 612 +++++++++++++++++++++++++++++++++
5 files changed, 630 insertions(+)
create mode 100644 drivers/net/dwc_eth_qos_qcom.c

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 7873538cc2..815e1f9248 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -242,6 +242,13 @@ config DWC_ETH_QOS_TEGRA186
The Synopsys Designware Ethernet QOS IP block with specific
configuration used in NVIDIA's Tegra186 chip.

+config DWC_ETH_QOS_QCOM
+ bool "Synopsys DWC Ethernet QOS device support for Qcom SoCs"
+ depends on DWC_ETH_QOS
+ help
+ The Synopsys Designware Ethernet QOS IP block with specific
+ configuration used in Qcom QCS404 SoC.
+
config E1000
bool "Intel PRO/1000 Gigabit Ethernet support"
depends on PCI
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 5b4e60eea3..b009b10aca 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_DRIVER_DM9000) += dm9000x.o
obj-$(CONFIG_DSA_SANDBOX) += dsa_sandbox.o
obj-$(CONFIG_DWC_ETH_QOS) += dwc_eth_qos.o
obj-$(CONFIG_DWC_ETH_QOS_IMX) += dwc_eth_qos_imx.o
+obj-$(CONFIG_DWC_ETH_QOS_QCOM) += dwc_eth_qos_qcom.o
obj-$(CONFIG_E1000) += e1000.o
obj-$(CONFIG_E1000_SPI) += e1000_spi.o
obj-$(CONFIG_EEPRO100) += eepro100.o
diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index 65b8556be2..112deb546d 100644
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -1712,6 +1712,13 @@ static const struct udevice_id eqos_ids[] = {
},
#endif

+#if IS_ENABLED(CONFIG_DWC_ETH_QOS_QCOM)
+ {
+ .compatible = "qcom,qcs404-ethqos",
+ .data = (ulong)&eqos_qcom_config
+ },
+#endif
+
{ }
};

diff --git a/drivers/net/dwc_eth_qos.h b/drivers/net/dwc_eth_qos.h
index 466a792de7..fddbe9336c 100644
--- a/drivers/net/dwc_eth_qos.h
+++ b/drivers/net/dwc_eth_qos.h
@@ -253,6 +253,7 @@ struct eqos_priv {
struct eqos_mtl_regs *mtl_regs;
struct eqos_dma_regs *dma_regs;
struct eqos_tegra186_regs *tegra186_regs;
+ void *eqos_qcom_rgmii_regs;
struct reset_ctl reset_ctl;
struct gpio_desc phy_reset_gpio;
struct clk clk_master_bus;
@@ -277,6 +278,7 @@ struct eqos_priv {
bool reg_access_ok;
bool clk_ck_enabled;
unsigned int tx_fifo_sz, rx_fifo_sz;
+ u32 reset_delays[3];
};

void eqos_inval_desc_generic(void *desc);
@@ -286,3 +288,4 @@ void eqos_flush_buffer_generic(void *buf, size_t size);
int eqos_null_ops(struct udevice *dev);

extern struct eqos_config eqos_imx_config;
+extern struct eqos_config eqos_qcom_config;
diff --git a/drivers/net/dwc_eth_qos_qcom.c b/drivers/net/dwc_eth_qos_qcom.c
new file mode 100644
index 0000000000..df83f1c5f9
--- /dev/null
+++ b/drivers/net/dwc_eth_qos_qcom.c
@@ -0,0 +1,612 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2022-2023 Sumit Garg <sumit.garg@linaro.org>
+ *
+ * Qcom DWMAC specific glue layer
+ */
+
+#include <common.h>
+#include <asm/global_data.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <clk.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <phy.h>
+#include <reset.h>
+#include <syscon.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+
+#include "dwc_eth_qos.h"
+
+/* RGMII_IO_MACRO_CONFIG fields */
+#define RGMII_CONFIG_FUNC_CLK_EN BIT(30)
+#define RGMII_CONFIG_POS_NEG_DATA_SEL BIT(23)
+#define RGMII_CONFIG_GPIO_CFG_RX_INT GENMASK(21, 20)
+#define RGMII_CONFIG_GPIO_CFG_TX_INT GENMASK(19, 17)
+#define RGMII_CONFIG_MAX_SPD_PRG_9 GENMASK(16, 8)
+#define RGMII_CONFIG_MAX_SPD_PRG_2 GENMASK(7, 6)
+#define RGMII_CONFIG_INTF_SEL GENMASK(5, 4)
+#define RGMII_CONFIG_BYPASS_TX_ID_EN BIT(3)
+#define RGMII_CONFIG_LOOPBACK_EN BIT(2)
+#define RGMII_CONFIG_PROG_SWAP BIT(1)
+#define RGMII_CONFIG_DDR_MODE BIT(0)
+
+/* SDCC_HC_REG_DLL_CONFIG fields */
+#define SDCC_DLL_CONFIG_DLL_RST BIT(30)
+#define SDCC_DLL_CONFIG_PDN BIT(29)
+#define SDCC_DLL_CONFIG_MCLK_FREQ GENMASK(26, 24)
+#define SDCC_DLL_CONFIG_CDR_SELEXT GENMASK(23, 20)
+#define SDCC_DLL_CONFIG_CDR_EXT_EN BIT(19)
+#define SDCC_DLL_CONFIG_CK_OUT_EN BIT(18)
+#define SDCC_DLL_CONFIG_CDR_EN BIT(17)
+#define SDCC_DLL_CONFIG_DLL_EN BIT(16)
+#define SDCC_DLL_MCLK_GATING_EN BIT(5)
+#define SDCC_DLL_CDR_FINE_PHASE GENMASK(3, 2)
+
+/* SDCC_HC_REG_DDR_CONFIG fields */
+#define SDCC_DDR_CONFIG_PRG_DLY_EN BIT(31)
+#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY GENMASK(26, 21)
+#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE GENMASK(29, 27)
+#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN BIT(30)
+#define SDCC_DDR_CONFIG_PRG_RCLK_DLY GENMASK(8, 0)
+
+/* SDCC_HC_REG_DLL_CONFIG2 fields */
+#define SDCC_DLL_CONFIG2_DLL_CLOCK_DIS BIT(21)
+#define SDCC_DLL_CONFIG2_MCLK_FREQ_CALC GENMASK(17, 10)
+#define SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL GENMASK(3, 2)
+#define SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW BIT(1)
+#define SDCC_DLL_CONFIG2_DDR_CAL_EN BIT(0)
+
+/* SDC4_STATUS bits */
+#define SDC4_STATUS_DLL_LOCK BIT(7)
+
+/* RGMII_IO_MACRO_CONFIG2 fields */
+#define RGMII_CONFIG2_RSVD_CONFIG15 GENMASK(31, 17)
+#define RGMII_CONFIG2_RGMII_CLK_SEL_CFG BIT(16)
+#define RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN BIT(13)
+#define RGMII_CONFIG2_CLK_DIVIDE_SEL BIT(12)
+#define RGMII_CONFIG2_RX_PROG_SWAP BIT(7)
+#define RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL BIT(6)
+#define RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN BIT(5)
+
+struct dwmac_rgmii_regs {
+ u32 io_macro_config; /* 0x00 */
+ u32 sdcc_hc_dll_config; /* 0x04 */
+ u32 reserved_1; /* 0x08 */
+ u32 sdcc_hc_ddr_config; /* 0x0c */
+ u32 sdcc_hc_dll_config2; /* 0x10 */
+ u32 sdc4_status; /* 0x14 */
+ u32 sdcc_usr_ctl; /* 0x18 */
+ u32 io_macro_config2; /* 0x1c */
+ u32 io_macro_debug1; /* 0x20 */
+ u32 reserved_2; /* 0x24 */
+ u32 emac_sys_low_power_dbg; /* 0x28 */
+ u32 reserved_3[53]; /* upto 0x100 */
+};
+
+static struct dwmac_rgmii_regs emac_v2_3_0_por = {
+ .io_macro_config = 0x00C01343,
+ .sdcc_hc_dll_config = 0x2004642C,
+ .sdcc_hc_ddr_config = 0x00000000,
+ .sdcc_hc_dll_config2 = 0x00200000,
+ .sdcc_usr_ctl = 0x00010800,
+ .io_macro_config2 = 0x00002060
+};
+
+static void ethqos_set_func_clk_en(struct dwmac_rgmii_regs *regs)
+{
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_FUNC_CLK_EN);
+}
+
+static int ethqos_dll_configure(struct udevice *dev,
+ struct dwmac_rgmii_regs *regs)
+{
+ unsigned int val;
+ int retry = 1000;
+
+ /* Set CDR_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_CDR_EN);
+
+ /* Set CDR_EXT_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_CDR_EXT_EN);
+
+ /* Clear CK_OUT_EN */
+ clrbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_CK_OUT_EN);
+
+ /* Set DLL_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_DLL_EN);
+
+ clrbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_MCLK_GATING_EN);
+
+ clrbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CDR_FINE_PHASE);
+
+ /* Wait for CK_OUT_EN clear */
+ do {
+ val = readl(&regs->sdcc_hc_dll_config);
+ val &= SDCC_DLL_CONFIG_CK_OUT_EN;
+ if (!val)
+ break;
+ mdelay(1);
+ retry--;
+ } while (retry > 0);
+ if (!retry)
+ dev_err(dev, "Clear CK_OUT_EN timedout\n");
+
+ /* Set CK_OUT_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_CK_OUT_EN);
+
+ /* Wait for CK_OUT_EN set */
+ retry = 1000;
+ do {
+ val = readl(&regs->sdcc_hc_dll_config);
+ val &= SDCC_DLL_CONFIG_CK_OUT_EN;
+ if (val)
+ break;
+ mdelay(1);
+ retry--;
+ } while (retry > 0);
+ if (!retry)
+ dev_err(dev, "Set CK_OUT_EN timedout\n");
+
+ /* Set DDR_CAL_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config2, SDCC_DLL_CONFIG2_DDR_CAL_EN);
+
+ clrbits_le32(&regs->sdcc_hc_dll_config2,
+ SDCC_DLL_CONFIG2_DLL_CLOCK_DIS);
+
+ clrsetbits_le32(&regs->sdcc_hc_dll_config2,
+ SDCC_DLL_CONFIG2_MCLK_FREQ_CALC, 0x1A << 10);
+
+ clrsetbits_le32(&regs->sdcc_hc_dll_config2,
+ SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL, BIT(2));
+
+ setbits_le32(&regs->sdcc_hc_dll_config2,
+ SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW);
+
+ return 0;
+}
+
+static int ethqos_rgmii_macro_init(struct udevice *dev,
+ struct dwmac_rgmii_regs *regs,
+ unsigned long speed)
+{
+ /* Disable loopback mode */
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN);
+
+ /* Select RGMII, write 0 to interface select */
+ clrbits_le32(&regs->io_macro_config, RGMII_CONFIG_INTF_SEL);
+
+ switch (speed) {
+ case SPEED_1000:
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_DDR_MODE);
+ clrbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_BYPASS_TX_ID_EN);
+ setbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_POS_NEG_DATA_SEL);
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_PROG_SWAP);
+
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL);
+ setbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN);
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_RSVD_CONFIG15);
+ setbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_RX_PROG_SWAP);
+
+ /* Set PRG_RCLK_DLY to 57 for 1.8 ns delay */
+ clrsetbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_PRG_RCLK_DLY, 57);
+ setbits_le32(&regs->sdcc_hc_ddr_config, SDCC_DDR_CONFIG_PRG_DLY_EN);
+
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_LOOPBACK_EN);
+ break;
+
+ case SPEED_100:
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_DDR_MODE);
+ setbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_BYPASS_TX_ID_EN);
+ clrbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_POS_NEG_DATA_SEL);
+ clrbits_le32(&regs->io_macro_config, RGMII_CONFIG_PROG_SWAP);
+ clrsetbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_MAX_SPD_PRG_2, BIT(6));
+
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL);
+ setbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN);
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_RSVD_CONFIG15);
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_RX_PROG_SWAP);
+
+ /* Write 0x5 to PRG_RCLK_DLY_CODE */
+ clrsetbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
+ (BIT(29) | BIT(27)));
+ setbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY);
+ setbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN);
+
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_LOOPBACK_EN);
+ break;
+
+ case SPEED_10:
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_DDR_MODE);
+ setbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_BYPASS_TX_ID_EN);
+ clrbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_POS_NEG_DATA_SEL);
+ clrbits_le32(&regs->io_macro_config, RGMII_CONFIG_PROG_SWAP);
+ clrsetbits_le32(&regs->io_macro_config,
+ RGMII_CONFIG_MAX_SPD_PRG_9,
+ BIT(12) | GENMASK(9, 8));
+
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL);
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN);
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_RSVD_CONFIG15);
+ clrbits_le32(&regs->io_macro_config2,
+ RGMII_CONFIG2_RX_PROG_SWAP);
+
+ /* Write 0x5 to PRG_RCLK_DLY_CODE */
+ clrsetbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
+ (BIT(29) | BIT(27)));
+ setbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY);
+ setbits_le32(&regs->sdcc_hc_ddr_config,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN);
+
+ setbits_le32(&regs->io_macro_config, RGMII_CONFIG_LOOPBACK_EN);
+ break;
+
+ default:
+ dev_err(dev, "Invalid speed %ld\n", speed);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ethqos_configure(struct udevice *dev,
+ struct dwmac_rgmii_regs *regs,
+ unsigned long speed)
+{
+ unsigned int retry = 1000;
+
+ /* Reset to POR values and enable clk */
+ writel(emac_v2_3_0_por.io_macro_config, &regs->io_macro_config);
+ writel(emac_v2_3_0_por.sdcc_hc_dll_config, &regs->sdcc_hc_dll_config);
+ writel(emac_v2_3_0_por.sdcc_hc_ddr_config, &regs->sdcc_hc_ddr_config);
+ writel(emac_v2_3_0_por.sdcc_hc_dll_config2, &regs->sdcc_hc_dll_config2);
+ writel(emac_v2_3_0_por.sdcc_usr_ctl, &regs->sdcc_usr_ctl);
+ writel(emac_v2_3_0_por.io_macro_config2, &regs->io_macro_config2);
+
+ ethqos_set_func_clk_en(regs);
+
+ /* Initialize the DLL first */
+
+ /* Set DLL_RST */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_DLL_RST);
+
+ /* Set PDN */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_PDN);
+
+ /* Clear DLL_RST */
+ clrbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_DLL_RST);
+
+ /* Clear PDN */
+ clrbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_PDN);
+
+ if (speed == SPEED_1000) {
+ /* Set DLL_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config, SDCC_DLL_CONFIG_DLL_EN);
+
+ /* Set CK_OUT_EN */
+ setbits_le32(&regs->sdcc_hc_dll_config,
+ SDCC_DLL_CONFIG_CK_OUT_EN);
+
+ /* Set USR_CTL bit 26 with mask of 3 bits */
+ clrsetbits_le32(&regs->sdcc_usr_ctl, GENMASK(26, 24), BIT(26));
+
+ /* wait for DLL LOCK */
+ do {
+ mdelay(1);
+ if (readl(&regs->sdc4_status) & SDC4_STATUS_DLL_LOCK)
+ break;
+ retry--;
+ } while (retry > 0);
+ if (!retry)
+ dev_err(dev, "Timeout while waiting for DLL lock\n");
+
+ ethqos_dll_configure(dev, regs);
+ }
+
+ ethqos_rgmii_macro_init(dev, regs, speed);
+
+ return 0;
+}
+
+static void ethqos_rgmii_dump(struct udevice *dev,
+ struct dwmac_rgmii_regs *regs)
+{
+ dev_dbg(dev, "Rgmii register dump\n");
+ dev_dbg(dev, "RGMII_IO_MACRO_CONFIG: %08x\n",
+ readl(&regs->io_macro_config));
+ dev_dbg(dev, "SDCC_HC_REG_DLL_CONFIG: %08x\n",
+ readl(&regs->sdcc_hc_dll_config));
+ dev_dbg(dev, "SDCC_HC_REG_DDR_CONFIG: %08x\n",
+ readl(&regs->sdcc_hc_ddr_config));
+ dev_dbg(dev, "SDCC_HC_REG_DLL_CONFIG2: %08x\n",
+ readl(&regs->sdcc_hc_dll_config2));
+ dev_dbg(dev, "SDC4_STATUS: %08x\n",
+ readl(&regs->sdc4_status));
+ dev_dbg(dev, "SDCC_USR_CTL: %08x\n",
+ readl(&regs->sdcc_usr_ctl));
+ dev_dbg(dev, "RGMII_IO_MACRO_CONFIG2: %08x\n",
+ readl(&regs->io_macro_config2));
+ dev_dbg(dev, "RGMII_IO_MACRO_DEBUG1: %08x\n",
+ readl(&regs->io_macro_debug1));
+ dev_dbg(dev, "EMAC_SYSTEM_LOW_POWER_DEBUG: %08x\n",
+ readl(&regs->emac_sys_low_power_dbg));
+}
+
+static int qcom_eqos_rgmii_set_speed(struct udevice *dev,
+ void *rgmii_regs,
+ unsigned long speed)
+{
+ int ret;
+
+ ethqos_rgmii_dump(dev, rgmii_regs);
+
+ ret = ethqos_configure(dev, rgmii_regs, speed);
+ if (ret)
+ return ret;
+
+ ethqos_rgmii_dump(dev, rgmii_regs);
+
+ return 0;
+}
+
+static int qcom_eqos_rgmii_reset(struct udevice *dev, void *rgmii_regs)
+{
+ ethqos_set_func_clk_en(rgmii_regs);
+
+ return 0;
+}
+
+static int eqos_start_clks_qcom(struct udevice *dev)
+{
+ if (IS_ENABLED(CONFIG_CLK)) {
+ struct clk_bulk clocks;
+ int ret;
+
+ ret = clk_get_bulk(dev, &clocks);
+ if (ret)
+ return ret;
+
+ ret = clk_enable_bulk(&clocks);
+ if (ret)
+ return ret;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static int eqos_stop_clks_qcom(struct udevice *dev)
+{
+ if (IS_ENABLED(CONFIG_CLK)) {
+ struct clk_bulk clocks;
+ int ret;
+
+ ret = clk_get_bulk(dev, &clocks);
+ if (ret)
+ return ret;
+
+ ret = clk_disable_bulk(&clocks);
+ if (ret)
+ return ret;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static int eqos_start_resets_qcom(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ if (!eqos->phy) {
+ ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
+ if (ret < 0) {
+ pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d", ret);
+ return ret;
+ }
+
+ udelay(eqos->reset_delays[0]);
+
+ ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
+ if (ret < 0) {
+ pr_err("dm_gpio_set_value(phy_reset, deassert) failed: %d", ret);
+ return ret;
+ }
+
+ udelay(eqos->reset_delays[1]);
+
+ ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
+ if (ret < 0) {
+ pr_err("dm_gpio_set_value(phy_reset, deassert) failed: %d", ret);
+ return ret;
+ }
+
+ udelay(eqos->reset_delays[2]);
+ }
+
+ ret = reset_deassert(&eqos->reset_ctl);
+ if (ret < 0) {
+ pr_err("reset_deassert() failed: %d", ret);
+ return ret;
+ }
+
+ ret = qcom_eqos_rgmii_reset(dev, eqos->eqos_qcom_rgmii_regs);
+ if (ret < 0) {
+ pr_err("qcom rgmii_reset failed: %d", ret);
+ return ret;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+/* Clock rates */
+#define RGMII_1000_NOM_CLK_FREQ (250 * 1000 * 1000UL)
+#define RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ (50 * 1000 * 1000UL)
+#define RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ (5 * 1000 * 1000UL)
+
+static int eqos_set_tx_clk_speed_qcom(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 = RGMII_1000_NOM_CLK_FREQ;
+ break;
+ case SPEED_100:
+ rate = RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;
+ break;
+ case SPEED_10:
+ rate = RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;
+ break;
+ default:
+ pr_err("invalid speed %d", eqos->phy->speed);
+ return -EINVAL;
+ }
+
+ ret = clk_set_rate(&eqos->clk_tx, rate);
+ if (ret < 0) {
+ pr_err("clk_set_rate(tx_clk, %lu) failed: %d", rate, ret);
+ return ret;
+ }
+
+ ret = qcom_eqos_rgmii_set_speed(dev, eqos->eqos_qcom_rgmii_regs,
+ eqos->phy->speed);
+ if (ret < 0) {
+ pr_err("qcom set_speed: %d, failed: %d", eqos->phy->speed, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int eqos_probe_resources_qcom(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+ phy_interface_t interface;
+ int reset_flags = GPIOD_IS_OUT;
+ int ret;
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ interface = eqos->config->interface(dev);
+
+ if (interface == PHY_INTERFACE_MODE_NA) {
+ pr_err("Invalid PHY interface\n");
+ return -EINVAL;
+ }
+
+ eqos->max_speed = dev_read_u32_default(dev, "max-speed", 0);
+
+ eqos->tx_fifo_sz = dev_read_u32_default(dev, "tx-fifo-depth", 0);
+ eqos->rx_fifo_sz = dev_read_u32_default(dev, "rx-fifo-depth", 0);
+
+ ret = reset_get_by_name(dev, "emac", &eqos->reset_ctl);
+ if (ret) {
+ pr_err("reset_get_by_name(rst) failed: %d", ret);
+ return ret;
+ }
+
+ if (dev_read_bool(dev, "snps,reset-active-low"))
+ reset_flags |= GPIOD_ACTIVE_LOW;
+
+ ret = gpio_request_by_name(dev, "snps,reset-gpio", 0,
+ &eqos->phy_reset_gpio, reset_flags);
+ if (ret == 0) {
+ ret = dev_read_u32_array(dev, "snps,reset-delays-us",
+ eqos->reset_delays, 3);
+ } else if (ret == -ENOENT) {
+ ret = 0;
+ }
+
+ eqos->eqos_qcom_rgmii_regs = (void *)dev_read_addr_name(dev, "rgmii");
+ if ((fdt_addr_t)eqos->eqos_qcom_rgmii_regs == FDT_ADDR_T_NONE) {
+ pr_err("Invalid RGMII address\n");
+ return -EINVAL;
+ }
+
+ ret = clk_get_by_name(dev, "rgmii", &eqos->clk_tx);
+ if (ret) {
+ pr_err("clk_get_by_name(tx) failed: %d", ret);
+ return -EINVAL;
+ }
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static int eqos_remove_resources_qcom(struct udevice *dev)
+{
+ struct eqos_priv *eqos = dev_get_priv(dev);
+
+ debug("%s(dev=%p):\n", __func__, dev);
+
+ clk_free(&eqos->clk_tx);
+ dm_gpio_free(dev, &eqos->phy_reset_gpio);
+ reset_free(&eqos->reset_ctl);
+
+ debug("%s: OK\n", __func__);
+ return 0;
+}
+
+static struct eqos_ops eqos_qcom_ops = {
+ .eqos_inval_desc = eqos_inval_desc_generic,
+ .eqos_flush_desc = eqos_flush_desc_generic,
+ .eqos_inval_buffer = eqos_inval_buffer_generic,
+ .eqos_flush_buffer = eqos_flush_buffer_generic,
+ .eqos_probe_resources = eqos_probe_resources_qcom,
+ .eqos_remove_resources = eqos_remove_resources_qcom,
+ .eqos_stop_resets = eqos_null_ops,
+ .eqos_start_resets = eqos_start_resets_qcom,
+ .eqos_stop_clks = eqos_stop_clks_qcom,
+ .eqos_start_clks = eqos_start_clks_qcom,
+ .eqos_calibrate_pads = eqos_null_ops,
+ .eqos_disable_calibration = eqos_null_ops,
+ .eqos_set_tx_clk_speed = eqos_set_tx_clk_speed_qcom,
+ .eqos_get_enetaddr = eqos_null_ops,
+};
+
+struct eqos_config __maybe_unused eqos_qcom_config = {
+ .reg_access_always_ok = false,
+ .mdio_wait = 10,
+ .swr_wait = 50,
+ .config_mac = EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_DCB,
+ .config_mac_mdio = EQOS_MAC_MDIO_ADDRESS_CR_250_300,
+ .axi_bus_width = EQOS_AXI_WIDTH_64,
+ .interface = dev_read_phy_mode,
+ .ops = &eqos_qcom_ops
+};
--
2.34.1