616 lines
18 KiB
C
616 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2018-19, Linaro Limited
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/phy.h>
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#include "stmmac.h"
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#include "stmmac_platform.h"
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#define RGMII_IO_MACRO_CONFIG 0x0
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#define SDCC_HC_REG_DLL_CONFIG 0x4
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#define SDCC_HC_REG_DDR_CONFIG 0xC
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#define SDCC_HC_REG_DLL_CONFIG2 0x10
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#define SDC4_STATUS 0x14
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#define SDCC_USR_CTL 0x18
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#define RGMII_IO_MACRO_CONFIG2 0x1C
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#define RGMII_IO_MACRO_DEBUG1 0x20
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#define EMAC_SYSTEM_LOW_POWER_DEBUG 0x28
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/* RGMII_IO_MACRO_CONFIG fields */
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#define RGMII_CONFIG_FUNC_CLK_EN BIT(30)
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#define RGMII_CONFIG_POS_NEG_DATA_SEL BIT(23)
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#define RGMII_CONFIG_GPIO_CFG_RX_INT GENMASK(21, 20)
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#define RGMII_CONFIG_GPIO_CFG_TX_INT GENMASK(19, 17)
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#define RGMII_CONFIG_MAX_SPD_PRG_9 GENMASK(16, 8)
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#define RGMII_CONFIG_MAX_SPD_PRG_2 GENMASK(7, 6)
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#define RGMII_CONFIG_INTF_SEL GENMASK(5, 4)
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#define RGMII_CONFIG_BYPASS_TX_ID_EN BIT(3)
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#define RGMII_CONFIG_LOOPBACK_EN BIT(2)
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#define RGMII_CONFIG_PROG_SWAP BIT(1)
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#define RGMII_CONFIG_DDR_MODE BIT(0)
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/* SDCC_HC_REG_DLL_CONFIG fields */
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#define SDCC_DLL_CONFIG_DLL_RST BIT(30)
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#define SDCC_DLL_CONFIG_PDN BIT(29)
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#define SDCC_DLL_CONFIG_MCLK_FREQ GENMASK(26, 24)
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#define SDCC_DLL_CONFIG_CDR_SELEXT GENMASK(23, 20)
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#define SDCC_DLL_CONFIG_CDR_EXT_EN BIT(19)
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#define SDCC_DLL_CONFIG_CK_OUT_EN BIT(18)
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#define SDCC_DLL_CONFIG_CDR_EN BIT(17)
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#define SDCC_DLL_CONFIG_DLL_EN BIT(16)
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#define SDCC_DLL_MCLK_GATING_EN BIT(5)
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#define SDCC_DLL_CDR_FINE_PHASE GENMASK(3, 2)
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/* SDCC_HC_REG_DDR_CONFIG fields */
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#define SDCC_DDR_CONFIG_PRG_DLY_EN BIT(31)
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#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY GENMASK(26, 21)
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#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE GENMASK(29, 27)
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#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN BIT(30)
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#define SDCC_DDR_CONFIG_PRG_RCLK_DLY GENMASK(8, 0)
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/* SDCC_HC_REG_DLL_CONFIG2 fields */
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#define SDCC_DLL_CONFIG2_DLL_CLOCK_DIS BIT(21)
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#define SDCC_DLL_CONFIG2_MCLK_FREQ_CALC GENMASK(17, 10)
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#define SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL GENMASK(3, 2)
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#define SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW BIT(1)
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#define SDCC_DLL_CONFIG2_DDR_CAL_EN BIT(0)
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/* SDC4_STATUS bits */
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#define SDC4_STATUS_DLL_LOCK BIT(7)
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/* RGMII_IO_MACRO_CONFIG2 fields */
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#define RGMII_CONFIG2_RSVD_CONFIG15 GENMASK(31, 17)
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#define RGMII_CONFIG2_RGMII_CLK_SEL_CFG BIT(16)
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#define RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN BIT(13)
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#define RGMII_CONFIG2_CLK_DIVIDE_SEL BIT(12)
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#define RGMII_CONFIG2_RX_PROG_SWAP BIT(7)
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#define RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL BIT(6)
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#define RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN BIT(5)
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struct ethqos_emac_por {
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unsigned int offset;
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unsigned int value;
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};
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struct ethqos_emac_driver_data {
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const struct ethqos_emac_por *por;
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unsigned int num_por;
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bool rgmii_config_looback_en;
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};
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struct qcom_ethqos {
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struct platform_device *pdev;
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void __iomem *rgmii_base;
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unsigned int rgmii_clk_rate;
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struct clk *rgmii_clk;
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unsigned int speed;
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const struct ethqos_emac_por *por;
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unsigned int num_por;
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bool rgmii_config_looback_en;
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};
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static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
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{
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return readl(ethqos->rgmii_base + offset);
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}
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static void rgmii_writel(struct qcom_ethqos *ethqos,
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int value, unsigned int offset)
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{
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writel(value, ethqos->rgmii_base + offset);
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}
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static void rgmii_updatel(struct qcom_ethqos *ethqos,
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int mask, int val, unsigned int offset)
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{
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unsigned int temp;
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temp = rgmii_readl(ethqos, offset);
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temp = (temp & ~(mask)) | val;
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rgmii_writel(ethqos, temp, offset);
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}
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static void rgmii_dump(void *priv)
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{
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struct qcom_ethqos *ethqos = priv;
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dev_dbg(ðqos->pdev->dev, "Rgmii register dump\n");
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dev_dbg(ðqos->pdev->dev, "RGMII_IO_MACRO_CONFIG: %x\n",
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rgmii_readl(ethqos, RGMII_IO_MACRO_CONFIG));
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dev_dbg(ðqos->pdev->dev, "SDCC_HC_REG_DLL_CONFIG: %x\n",
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rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG));
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dev_dbg(ðqos->pdev->dev, "SDCC_HC_REG_DDR_CONFIG: %x\n",
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rgmii_readl(ethqos, SDCC_HC_REG_DDR_CONFIG));
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dev_dbg(ðqos->pdev->dev, "SDCC_HC_REG_DLL_CONFIG2: %x\n",
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rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG2));
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dev_dbg(ðqos->pdev->dev, "SDC4_STATUS: %x\n",
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rgmii_readl(ethqos, SDC4_STATUS));
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dev_dbg(ðqos->pdev->dev, "SDCC_USR_CTL: %x\n",
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rgmii_readl(ethqos, SDCC_USR_CTL));
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dev_dbg(ðqos->pdev->dev, "RGMII_IO_MACRO_CONFIG2: %x\n",
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rgmii_readl(ethqos, RGMII_IO_MACRO_CONFIG2));
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dev_dbg(ðqos->pdev->dev, "RGMII_IO_MACRO_DEBUG1: %x\n",
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rgmii_readl(ethqos, RGMII_IO_MACRO_DEBUG1));
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dev_dbg(ðqos->pdev->dev, "EMAC_SYSTEM_LOW_POWER_DEBUG: %x\n",
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rgmii_readl(ethqos, EMAC_SYSTEM_LOW_POWER_DEBUG));
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}
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/* Clock rates */
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#define RGMII_1000_NOM_CLK_FREQ (250 * 1000 * 1000UL)
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#define RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ (50 * 1000 * 1000UL)
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#define RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ (5 * 1000 * 1000UL)
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static void
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ethqos_update_rgmii_clk(struct qcom_ethqos *ethqos, unsigned int speed)
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{
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switch (speed) {
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case SPEED_1000:
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ethqos->rgmii_clk_rate = RGMII_1000_NOM_CLK_FREQ;
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break;
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case SPEED_100:
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ethqos->rgmii_clk_rate = RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;
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break;
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case SPEED_10:
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ethqos->rgmii_clk_rate = RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;
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break;
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}
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clk_set_rate(ethqos->rgmii_clk, ethqos->rgmii_clk_rate);
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}
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static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
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{
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rgmii_updatel(ethqos, RGMII_CONFIG_FUNC_CLK_EN,
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RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);
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}
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static const struct ethqos_emac_por emac_v2_3_0_por[] = {
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{ .offset = RGMII_IO_MACRO_CONFIG, .value = 0x00C01343 },
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{ .offset = SDCC_HC_REG_DLL_CONFIG, .value = 0x2004642C },
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{ .offset = SDCC_HC_REG_DDR_CONFIG, .value = 0x00000000 },
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{ .offset = SDCC_HC_REG_DLL_CONFIG2, .value = 0x00200000 },
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{ .offset = SDCC_USR_CTL, .value = 0x00010800 },
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{ .offset = RGMII_IO_MACRO_CONFIG2, .value = 0x00002060 },
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};
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static const struct ethqos_emac_driver_data emac_v2_3_0_data = {
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.por = emac_v2_3_0_por,
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.num_por = ARRAY_SIZE(emac_v2_3_0_por),
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.rgmii_config_looback_en = true,
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};
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static const struct ethqos_emac_por emac_v2_1_0_por[] = {
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{ .offset = RGMII_IO_MACRO_CONFIG, .value = 0x40C01343 },
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{ .offset = SDCC_HC_REG_DLL_CONFIG, .value = 0x2004642C },
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{ .offset = SDCC_HC_REG_DDR_CONFIG, .value = 0x00000000 },
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{ .offset = SDCC_HC_REG_DLL_CONFIG2, .value = 0x00200000 },
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{ .offset = SDCC_USR_CTL, .value = 0x00010800 },
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{ .offset = RGMII_IO_MACRO_CONFIG2, .value = 0x00002060 },
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};
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static const struct ethqos_emac_driver_data emac_v2_1_0_data = {
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.por = emac_v2_1_0_por,
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.num_por = ARRAY_SIZE(emac_v2_1_0_por),
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.rgmii_config_looback_en = false,
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};
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static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
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{
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unsigned int val;
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int retry = 1000;
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/* Set CDR_EN */
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,
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SDCC_DLL_CONFIG_CDR_EN, SDCC_HC_REG_DLL_CONFIG);
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/* Set CDR_EXT_EN */
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EXT_EN,
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SDCC_DLL_CONFIG_CDR_EXT_EN, SDCC_HC_REG_DLL_CONFIG);
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/* Clear CK_OUT_EN */
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
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0, SDCC_HC_REG_DLL_CONFIG);
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/* Set DLL_EN */
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
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SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
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rgmii_updatel(ethqos, SDCC_DLL_MCLK_GATING_EN,
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0, SDCC_HC_REG_DLL_CONFIG);
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rgmii_updatel(ethqos, SDCC_DLL_CDR_FINE_PHASE,
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0, SDCC_HC_REG_DLL_CONFIG);
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/* Wait for CK_OUT_EN clear */
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do {
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val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
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val &= SDCC_DLL_CONFIG_CK_OUT_EN;
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if (!val)
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break;
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mdelay(1);
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retry--;
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} while (retry > 0);
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if (!retry)
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dev_err(ðqos->pdev->dev, "Clear CK_OUT_EN timedout\n");
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/* Set CK_OUT_EN */
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
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SDCC_DLL_CONFIG_CK_OUT_EN, SDCC_HC_REG_DLL_CONFIG);
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/* Wait for CK_OUT_EN set */
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retry = 1000;
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do {
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val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
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val &= SDCC_DLL_CONFIG_CK_OUT_EN;
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if (val)
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break;
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mdelay(1);
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retry--;
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} while (retry > 0);
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if (!retry)
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dev_err(ðqos->pdev->dev, "Set CK_OUT_EN timedout\n");
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/* Set DDR_CAL_EN */
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,
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SDCC_DLL_CONFIG2_DDR_CAL_EN, SDCC_HC_REG_DLL_CONFIG2);
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,
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0, SDCC_HC_REG_DLL_CONFIG2);
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_MCLK_FREQ_CALC,
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0x1A << 10, SDCC_HC_REG_DLL_CONFIG2);
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL,
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BIT(2), SDCC_HC_REG_DLL_CONFIG2);
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rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
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SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
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SDCC_HC_REG_DLL_CONFIG2);
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return 0;
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}
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static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
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{
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/* Disable loopback mode */
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rgmii_updatel(ethqos, RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN,
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0, RGMII_IO_MACRO_CONFIG2);
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/* Select RGMII, write 0 to interface select */
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rgmii_updatel(ethqos, RGMII_CONFIG_INTF_SEL,
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0, RGMII_IO_MACRO_CONFIG);
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switch (ethqos->speed) {
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case SPEED_1000:
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rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
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RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
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0, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
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RGMII_CONFIG_POS_NEG_DATA_SEL,
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RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
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RGMII_CONFIG_PROG_SWAP, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
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0, RGMII_IO_MACRO_CONFIG2);
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rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
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RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
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RGMII_IO_MACRO_CONFIG2);
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rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
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0, RGMII_IO_MACRO_CONFIG2);
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rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
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RGMII_CONFIG2_RX_PROG_SWAP,
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RGMII_IO_MACRO_CONFIG2);
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/* Set PRG_RCLK_DLY to 57 for 1.8 ns delay */
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rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_RCLK_DLY,
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57, SDCC_HC_REG_DDR_CONFIG);
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rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,
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SDCC_DDR_CONFIG_PRG_DLY_EN,
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SDCC_HC_REG_DDR_CONFIG);
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if (ethqos->rgmii_config_looback_en)
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rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
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RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
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else
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rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
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0, RGMII_IO_MACRO_CONFIG);
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break;
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case SPEED_100:
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rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
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RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
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RGMII_CONFIG_BYPASS_TX_ID_EN,
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RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
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0, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
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0, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
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0, RGMII_IO_MACRO_CONFIG2);
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rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
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RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
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RGMII_IO_MACRO_CONFIG2);
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rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_2,
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BIT(6), RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
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0, RGMII_IO_MACRO_CONFIG2);
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rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
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0, RGMII_IO_MACRO_CONFIG2);
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/* Write 0x5 to PRG_RCLK_DLY_CODE */
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rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
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(BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
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rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
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SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
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SDCC_HC_REG_DDR_CONFIG);
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rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
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SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
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SDCC_HC_REG_DDR_CONFIG);
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if (ethqos->rgmii_config_looback_en)
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rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
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RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
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else
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rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
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0, RGMII_IO_MACRO_CONFIG);
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break;
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case SPEED_10:
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rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
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RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
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RGMII_CONFIG_BYPASS_TX_ID_EN,
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RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
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0, RGMII_IO_MACRO_CONFIG);
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rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
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0, RGMII_IO_MACRO_CONFIG);
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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(ðqos->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(ðqos->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(ðqos->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");
|