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path: root/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
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Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c615
1 files changed, 615 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
new file mode 100644
index 000000000..732774645
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -0,0 +1,615 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018-19, Linaro Limited
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+#include "stmmac.h"
+#include "stmmac_platform.h"
+
+#define RGMII_IO_MACRO_CONFIG 0x0
+#define SDCC_HC_REG_DLL_CONFIG 0x4
+#define SDCC_HC_REG_DDR_CONFIG 0xC
+#define SDCC_HC_REG_DLL_CONFIG2 0x10
+#define SDC4_STATUS 0x14
+#define SDCC_USR_CTL 0x18
+#define RGMII_IO_MACRO_CONFIG2 0x1C
+#define RGMII_IO_MACRO_DEBUG1 0x20
+#define EMAC_SYSTEM_LOW_POWER_DEBUG 0x28
+
+/* 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 ethqos_emac_por {
+ unsigned int offset;
+ unsigned int value;
+};
+
+struct ethqos_emac_driver_data {
+ const struct ethqos_emac_por *por;
+ unsigned int num_por;
+ bool rgmii_config_looback_en;
+};
+
+struct qcom_ethqos {
+ struct platform_device *pdev;
+ void __iomem *rgmii_base;
+
+ unsigned int rgmii_clk_rate;
+ struct clk *rgmii_clk;
+ unsigned int speed;
+
+ const struct ethqos_emac_por *por;
+ unsigned int num_por;
+ bool rgmii_config_looback_en;
+};
+
+static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
+{
+ return readl(ethqos->rgmii_base + offset);
+}
+
+static void rgmii_writel(struct qcom_ethqos *ethqos,
+ int value, unsigned int offset)
+{
+ writel(value, ethqos->rgmii_base + offset);
+}
+
+static void rgmii_updatel(struct qcom_ethqos *ethqos,
+ int mask, int val, unsigned int offset)
+{
+ unsigned int temp;
+
+ temp = rgmii_readl(ethqos, offset);
+ temp = (temp & ~(mask)) | val;
+ rgmii_writel(ethqos, temp, offset);
+}
+
+static void rgmii_dump(void *priv)
+{
+ struct qcom_ethqos *ethqos = priv;
+
+ dev_dbg(&ethqos->pdev->dev, "Rgmii register dump\n");
+ dev_dbg(&ethqos->pdev->dev, "RGMII_IO_MACRO_CONFIG: %x\n",
+ rgmii_readl(ethqos, RGMII_IO_MACRO_CONFIG));
+ dev_dbg(&ethqos->pdev->dev, "SDCC_HC_REG_DLL_CONFIG: %x\n",
+ rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG));
+ dev_dbg(&ethqos->pdev->dev, "SDCC_HC_REG_DDR_CONFIG: %x\n",
+ rgmii_readl(ethqos, SDCC_HC_REG_DDR_CONFIG));
+ dev_dbg(&ethqos->pdev->dev, "SDCC_HC_REG_DLL_CONFIG2: %x\n",
+ rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG2));
+ dev_dbg(&ethqos->pdev->dev, "SDC4_STATUS: %x\n",
+ rgmii_readl(ethqos, SDC4_STATUS));
+ dev_dbg(&ethqos->pdev->dev, "SDCC_USR_CTL: %x\n",
+ rgmii_readl(ethqos, SDCC_USR_CTL));
+ dev_dbg(&ethqos->pdev->dev, "RGMII_IO_MACRO_CONFIG2: %x\n",
+ rgmii_readl(ethqos, RGMII_IO_MACRO_CONFIG2));
+ dev_dbg(&ethqos->pdev->dev, "RGMII_IO_MACRO_DEBUG1: %x\n",
+ rgmii_readl(ethqos, RGMII_IO_MACRO_DEBUG1));
+ dev_dbg(&ethqos->pdev->dev, "EMAC_SYSTEM_LOW_POWER_DEBUG: %x\n",
+ rgmii_readl(ethqos, EMAC_SYSTEM_LOW_POWER_DEBUG));
+}
+
+/* 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 void
+ethqos_update_rgmii_clk(struct qcom_ethqos *ethqos, unsigned int speed)
+{
+ switch (speed) {
+ case SPEED_1000:
+ ethqos->rgmii_clk_rate = RGMII_1000_NOM_CLK_FREQ;
+ break;
+
+ case SPEED_100:
+ ethqos->rgmii_clk_rate = RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;
+ break;
+
+ case SPEED_10:
+ ethqos->rgmii_clk_rate = RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;
+ break;
+ }
+
+ clk_set_rate(ethqos->rgmii_clk, ethqos->rgmii_clk_rate);
+}
+
+static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
+{
+ rgmii_updatel(ethqos, RGMII_CONFIG_FUNC_CLK_EN,
+ RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);
+}
+
+static const struct ethqos_emac_por emac_v2_3_0_por[] = {
+ { .offset = RGMII_IO_MACRO_CONFIG, .value = 0x00C01343 },
+ { .offset = SDCC_HC_REG_DLL_CONFIG, .value = 0x2004642C },
+ { .offset = SDCC_HC_REG_DDR_CONFIG, .value = 0x00000000 },
+ { .offset = SDCC_HC_REG_DLL_CONFIG2, .value = 0x00200000 },
+ { .offset = SDCC_USR_CTL, .value = 0x00010800 },
+ { .offset = RGMII_IO_MACRO_CONFIG2, .value = 0x00002060 },
+};
+
+static const struct ethqos_emac_driver_data emac_v2_3_0_data = {
+ .por = emac_v2_3_0_por,
+ .num_por = ARRAY_SIZE(emac_v2_3_0_por),
+ .rgmii_config_looback_en = true,
+};
+
+static const struct ethqos_emac_por emac_v2_1_0_por[] = {
+ { .offset = RGMII_IO_MACRO_CONFIG, .value = 0x40C01343 },
+ { .offset = SDCC_HC_REG_DLL_CONFIG, .value = 0x2004642C },
+ { .offset = SDCC_HC_REG_DDR_CONFIG, .value = 0x00000000 },
+ { .offset = SDCC_HC_REG_DLL_CONFIG2, .value = 0x00200000 },
+ { .offset = SDCC_USR_CTL, .value = 0x00010800 },
+ { .offset = RGMII_IO_MACRO_CONFIG2, .value = 0x00002060 },
+};
+
+static const struct ethqos_emac_driver_data emac_v2_1_0_data = {
+ .por = emac_v2_1_0_por,
+ .num_por = ARRAY_SIZE(emac_v2_1_0_por),
+ .rgmii_config_looback_en = false,
+};
+
+static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
+{
+ unsigned int val;
+ int retry = 1000;
+
+ /* Set CDR_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,
+ SDCC_DLL_CONFIG_CDR_EN, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Set CDR_EXT_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EXT_EN,
+ SDCC_DLL_CONFIG_CDR_EXT_EN, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Clear CK_OUT_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+ 0, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Set DLL_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
+ SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
+
+ rgmii_updatel(ethqos, SDCC_DLL_MCLK_GATING_EN,
+ 0, SDCC_HC_REG_DLL_CONFIG);
+
+ rgmii_updatel(ethqos, SDCC_DLL_CDR_FINE_PHASE,
+ 0, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Wait for CK_OUT_EN clear */
+ do {
+ val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
+ val &= SDCC_DLL_CONFIG_CK_OUT_EN;
+ if (!val)
+ break;
+ mdelay(1);
+ retry--;
+ } while (retry > 0);
+ if (!retry)
+ dev_err(&ethqos->pdev->dev, "Clear CK_OUT_EN timedout\n");
+
+ /* Set CK_OUT_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+ SDCC_DLL_CONFIG_CK_OUT_EN, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Wait for CK_OUT_EN set */
+ retry = 1000;
+ do {
+ val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
+ val &= SDCC_DLL_CONFIG_CK_OUT_EN;
+ if (val)
+ break;
+ mdelay(1);
+ retry--;
+ } while (retry > 0);
+ if (!retry)
+ dev_err(&ethqos->pdev->dev, "Set CK_OUT_EN timedout\n");
+
+ /* Set DDR_CAL_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,
+ SDCC_DLL_CONFIG2_DDR_CAL_EN, SDCC_HC_REG_DLL_CONFIG2);
+
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,
+ 0, SDCC_HC_REG_DLL_CONFIG2);
+
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_MCLK_FREQ_CALC,
+ 0x1A << 10, SDCC_HC_REG_DLL_CONFIG2);
+
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL,
+ BIT(2), SDCC_HC_REG_DLL_CONFIG2);
+
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
+ SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
+ SDCC_HC_REG_DLL_CONFIG2);
+
+ return 0;
+}
+
+static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
+{
+ /* Disable loopback mode */
+ rgmii_updatel(ethqos, RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN,
+ 0, RGMII_IO_MACRO_CONFIG2);
+
+ /* Select RGMII, write 0 to interface select */
+ rgmii_updatel(ethqos, RGMII_CONFIG_INTF_SEL,
+ 0, RGMII_IO_MACRO_CONFIG);
+
+ switch (ethqos->speed) {
+ case SPEED_1000:
+ rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
+ RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+ 0, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+ RGMII_CONFIG_POS_NEG_DATA_SEL,
+ RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
+ RGMII_CONFIG_PROG_SWAP, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+ RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+ RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+ RGMII_CONFIG2_RX_PROG_SWAP,
+ RGMII_IO_MACRO_CONFIG2);
+
+ /* Set PRG_RCLK_DLY to 57 for 1.8 ns delay */
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_RCLK_DLY,
+ 57, SDCC_HC_REG_DDR_CONFIG);
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,
+ SDCC_DDR_CONFIG_PRG_DLY_EN,
+ SDCC_HC_REG_DDR_CONFIG);
+ if (ethqos->rgmii_config_looback_en)
+ rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+ RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
+ else
+ rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+ 0, RGMII_IO_MACRO_CONFIG);
+ break;
+
+ case SPEED_100:
+ rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
+ RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+ RGMII_CONFIG_BYPASS_TX_ID_EN,
+ RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+ 0, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
+ 0, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+ RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+ RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_2,
+ BIT(6), RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ /* Write 0x5 to PRG_RCLK_DLY_CODE */
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
+ (BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+ SDCC_HC_REG_DDR_CONFIG);
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+ SDCC_HC_REG_DDR_CONFIG);
+ if (ethqos->rgmii_config_looback_en)
+ rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+ RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
+ else
+ rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+ 0, RGMII_IO_MACRO_CONFIG);
+
+ break;
+
+ case SPEED_10:
+ rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
+ RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+ RGMII_CONFIG_BYPASS_TX_ID_EN,
+ RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+ 0, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
+ 0, RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_9,
+ BIT(12) | GENMASK(9, 8),
+ RGMII_IO_MACRO_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+ 0, RGMII_IO_MACRO_CONFIG2);
+ /* Write 0x5 to PRG_RCLK_DLY_CODE */
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
+ (BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+ SDCC_HC_REG_DDR_CONFIG);
+ rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+ SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+ SDCC_HC_REG_DDR_CONFIG);
+ rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+ RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
+ break;
+ default:
+ dev_err(&ethqos->pdev->dev,
+ "Invalid speed %d\n", ethqos->speed);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ethqos_configure(struct qcom_ethqos *ethqos)
+{
+ volatile unsigned int dll_lock;
+ unsigned int i, retry = 1000;
+
+ /* Reset to POR values and enable clk */
+ for (i = 0; i < ethqos->num_por; i++)
+ rgmii_writel(ethqos, ethqos->por[i].value,
+ ethqos->por[i].offset);
+ ethqos_set_func_clk_en(ethqos);
+
+ /* Initialize the DLL first */
+
+ /* Set DLL_RST */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_RST,
+ SDCC_DLL_CONFIG_DLL_RST, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Set PDN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN,
+ SDCC_DLL_CONFIG_PDN, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Clear DLL_RST */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_RST, 0,
+ SDCC_HC_REG_DLL_CONFIG);
+
+ /* Clear PDN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN, 0,
+ SDCC_HC_REG_DLL_CONFIG);
+
+ if (ethqos->speed != SPEED_100 && ethqos->speed != SPEED_10) {
+ /* Set DLL_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
+ SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
+
+ /* Set CK_OUT_EN */
+ rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+ SDCC_DLL_CONFIG_CK_OUT_EN,
+ SDCC_HC_REG_DLL_CONFIG);
+
+ /* Set USR_CTL bit 26 with mask of 3 bits */
+ rgmii_updatel(ethqos, GENMASK(26, 24), BIT(26), SDCC_USR_CTL);
+
+ /* wait for DLL LOCK */
+ do {
+ mdelay(1);
+ dll_lock = rgmii_readl(ethqos, SDC4_STATUS);
+ if (dll_lock & SDC4_STATUS_DLL_LOCK)
+ break;
+ retry--;
+ } while (retry > 0);
+ if (!retry)
+ dev_err(&ethqos->pdev->dev,
+ "Timeout while waiting for DLL lock\n");
+ }
+
+ if (ethqos->speed == SPEED_1000)
+ ethqos_dll_configure(ethqos);
+
+ ethqos_rgmii_macro_init(ethqos);
+
+ return 0;
+}
+
+static void ethqos_fix_mac_speed(void *priv, unsigned int speed)
+{
+ struct qcom_ethqos *ethqos = priv;
+
+ ethqos->speed = speed;
+ ethqos_update_rgmii_clk(ethqos, speed);
+ ethqos_configure(ethqos);
+}
+
+static int ethqos_clks_config(void *priv, bool enabled)
+{
+ struct qcom_ethqos *ethqos = priv;
+ int ret = 0;
+
+ if (enabled) {
+ ret = clk_prepare_enable(ethqos->rgmii_clk);
+ if (ret) {
+ dev_err(&ethqos->pdev->dev, "rgmii_clk enable failed\n");
+ return ret;
+ }
+
+ /* Enable functional clock to prevent DMA reset to timeout due
+ * to lacking PHY clock after the hardware block has been power
+ * cycled. The actual configuration will be adjusted once
+ * ethqos_fix_mac_speed() is invoked.
+ */
+ ethqos_set_func_clk_en(ethqos);
+ } else {
+ clk_disable_unprepare(ethqos->rgmii_clk);
+ }
+
+ return ret;
+}
+
+static int qcom_ethqos_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct plat_stmmacenet_data *plat_dat;
+ struct stmmac_resources stmmac_res;
+ const struct ethqos_emac_driver_data *data;
+ struct qcom_ethqos *ethqos;
+ int ret;
+
+ ret = stmmac_get_platform_resources(pdev, &stmmac_res);
+ if (ret)
+ return ret;
+
+ plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
+ if (IS_ERR(plat_dat)) {
+ dev_err(&pdev->dev, "dt configuration failed\n");
+ return PTR_ERR(plat_dat);
+ }
+
+ plat_dat->clks_config = ethqos_clks_config;
+
+ ethqos = devm_kzalloc(&pdev->dev, sizeof(*ethqos), GFP_KERNEL);
+ if (!ethqos) {
+ ret = -ENOMEM;
+ goto err_mem;
+ }
+
+ ethqos->pdev = pdev;
+ ethqos->rgmii_base = devm_platform_ioremap_resource_byname(pdev, "rgmii");
+ if (IS_ERR(ethqos->rgmii_base)) {
+ ret = PTR_ERR(ethqos->rgmii_base);
+ goto err_mem;
+ }
+
+ data = of_device_get_match_data(&pdev->dev);
+ ethqos->por = data->por;
+ ethqos->num_por = data->num_por;
+ ethqos->rgmii_config_looback_en = data->rgmii_config_looback_en;
+
+ ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii");
+ if (IS_ERR(ethqos->rgmii_clk)) {
+ ret = PTR_ERR(ethqos->rgmii_clk);
+ goto err_mem;
+ }
+
+ ret = ethqos_clks_config(ethqos, true);
+ if (ret)
+ goto err_mem;
+
+ ethqos->speed = SPEED_1000;
+ ethqos_update_rgmii_clk(ethqos, SPEED_1000);
+ ethqos_set_func_clk_en(ethqos);
+
+ plat_dat->bsp_priv = ethqos;
+ plat_dat->fix_mac_speed = ethqos_fix_mac_speed;
+ plat_dat->dump_debug_regs = rgmii_dump;
+ plat_dat->has_gmac4 = 1;
+ plat_dat->pmt = 1;
+ plat_dat->tso_en = of_property_read_bool(np, "snps,tso");
+ if (of_device_is_compatible(np, "qcom,qcs404-ethqos"))
+ plat_dat->rx_clk_runs_in_lpi = 1;
+
+ ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+ if (ret)
+ goto err_clk;
+
+ return ret;
+
+err_clk:
+ ethqos_clks_config(ethqos, false);
+
+err_mem:
+ stmmac_remove_config_dt(pdev, plat_dat);
+
+ return ret;
+}
+
+static int qcom_ethqos_remove(struct platform_device *pdev)
+{
+ struct qcom_ethqos *ethqos;
+ int ret;
+
+ ethqos = get_stmmac_bsp_priv(&pdev->dev);
+ if (!ethqos)
+ return -ENODEV;
+
+ ret = stmmac_pltfr_remove(pdev);
+ ethqos_clks_config(ethqos, false);
+
+ return ret;
+}
+
+static const struct of_device_id qcom_ethqos_match[] = {
+ { .compatible = "qcom,qcs404-ethqos", .data = &emac_v2_3_0_data},
+ { .compatible = "qcom,sm8150-ethqos", .data = &emac_v2_1_0_data},
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_ethqos_match);
+
+static struct platform_driver qcom_ethqos_driver = {
+ .probe = qcom_ethqos_probe,
+ .remove = qcom_ethqos_remove,
+ .driver = {
+ .name = "qcom-ethqos",
+ .pm = &stmmac_pltfr_pm_ops,
+ .of_match_table = of_match_ptr(qcom_ethqos_match),
+ },
+};
+module_platform_driver(qcom_ethqos_driver);
+
+MODULE_DESCRIPTION("Qualcomm ETHQOS driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 06:39:32 +0000