--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+#include <linux/bitfield.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/phy.h>
+
+#include "mtk.h"
+
+#define MTK_2P5GPHY_ID_MT7988 0x00339c11
+
+#define MT7988_2P5GE_PMB_FW "mediatek/mt7988/i2p5ge-phy-pmb.bin"
+#define MT7988_2P5GE_PMB_FW_SIZE 0x20000
+#define MT7988_2P5GE_PMB_FW_BASE 0x0f100000
+#define MT7988_2P5GE_PMB_FW_LEN 0x20000
+#define MTK_2P5GPHY_MCU_CSR_BASE 0x0f0f0000
+#define MTK_2P5GPHY_MCU_CSR_LEN 0x20
+#define MD32_EN_CFG 0x18
+#define MD32_EN BIT(0)
+
+#define BASE100T_STATUS_EXTEND 0x10
+#define BASE1000T_STATUS_EXTEND 0x11
+#define EXTEND_CTRL_AND_STATUS 0x16
+
+#define PHY_AUX_CTRL_STATUS 0x1d
+#define PHY_AUX_DPX_MASK GENMASK(5, 5)
+#define PHY_AUX_SPEED_MASK GENMASK(4, 2)
+
+/* Registers on MDIO_MMD_VEND1 */
+#define MTK_PHY_LPI_PCS_DSP_CTRL 0x121
+#define MTK_PHY_LPI_SIG_EN_LO_THRESH100_MASK GENMASK(12, 8)
+
+#define MTK_PHY_HOST_CMD1 0x800e
+#define MTK_PHY_HOST_CMD2 0x800f
+/* Registers on Token Ring debug nodes */
+/* ch_addr = 0x0, node_addr = 0xf, data_addr = 0x3c */
+#define AUTO_NP_10XEN BIT(6)
+
+enum {
+ PHY_AUX_SPD_10 = 0,
+ PHY_AUX_SPD_100,
+ PHY_AUX_SPD_1000,
+ PHY_AUX_SPD_2500,
+};
+
+static int mt798x_2p5ge_phy_load_fw(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ void __iomem *mcu_csr_base, *pmb_addr;
+ const struct firmware *fw;
+ int ret, i;
+ u32 reg;
+
+ pmb_addr = ioremap(MT7988_2P5GE_PMB_FW_BASE, MT7988_2P5GE_PMB_FW_LEN);
+ if (!pmb_addr)
+ return -ENOMEM;
+ mcu_csr_base = ioremap(MTK_2P5GPHY_MCU_CSR_BASE,
+ MTK_2P5GPHY_MCU_CSR_LEN);
+ if (!mcu_csr_base) {
+ ret = -ENOMEM;
+ goto free_pmb;
+ }
+
+ ret = request_firmware_direct(&fw, MT7988_2P5GE_PMB_FW, dev);
+ if (ret) {
+ dev_err(dev, "failed to load firmware: %s, ret: %d\n",
+ MT7988_2P5GE_PMB_FW, ret);
+ goto free;
+ }
+
+ if (fw->size != MT7988_2P5GE_PMB_FW_SIZE) {
+ dev_err(dev, "Firmware size 0x%zx != 0x%x\n",
+ fw->size, MT7988_2P5GE_PMB_FW_SIZE);
+ ret = -EINVAL;
+ goto release_fw;
+ }
+
+ reg = readw(mcu_csr_base + MD32_EN_CFG);
+ if (reg & MD32_EN) {
+ phy_set_bits(phydev, MII_BMCR, BMCR_RESET);
+ usleep_range(10000, 11000);
+ }
+ phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
+
+ /* Write magic number to safely stall MCU */
+ phy_write_mmd(phydev, MDIO_MMD_VEND1, MTK_PHY_HOST_CMD1, 0x1100);
+ phy_write_mmd(phydev, MDIO_MMD_VEND1, MTK_PHY_HOST_CMD2, 0x00df);
+
+ for (i = 0; i < MT7988_2P5GE_PMB_FW_SIZE - 1; i += 4)
+ writel(*((uint32_t *)(fw->data + i)), pmb_addr + i);
+
+ writew(reg & ~MD32_EN, mcu_csr_base + MD32_EN_CFG);
+ writew(reg | MD32_EN, mcu_csr_base + MD32_EN_CFG);
+ phy_set_bits(phydev, MII_BMCR, BMCR_RESET);
+ /* We need a delay here to stabilize initialization of MCU */
+ usleep_range(7000, 8000);
+
+ dev_info(dev, "Firmware date code: %x/%x/%x, version: %x.%x\n",
+ be16_to_cpu(*((__be16 *)(fw->data +
+ MT7988_2P5GE_PMB_FW_SIZE - 8))),
+ *(fw->data + MT7988_2P5GE_PMB_FW_SIZE - 6),
+ *(fw->data + MT7988_2P5GE_PMB_FW_SIZE - 5),
+ *(fw->data + MT7988_2P5GE_PMB_FW_SIZE - 2),
+ *(fw->data + MT7988_2P5GE_PMB_FW_SIZE - 1));
+
+release_fw:
+ release_firmware(fw);
+free:
+ iounmap(mcu_csr_base);
+free_pmb:
+ iounmap(pmb_addr);
+
+ return ret;
+}
+
+static int mt798x_2p5ge_phy_config_init(struct phy_device *phydev)
+{
+ /* Check if PHY interface type is compatible */
+ if (phydev->interface != PHY_INTERFACE_MODE_INTERNAL)
+ return -ENODEV;
+
+ phy_modify_mmd(phydev, MDIO_MMD_VEND1, MTK_PHY_LPI_PCS_DSP_CTRL,
+ MTK_PHY_LPI_SIG_EN_LO_THRESH100_MASK, 0);
+
+ /* Enable 16-bit next page exchange bit if 1000-BT isn't advertising */
+ mtk_tr_modify(phydev, 0x0, 0xf, 0x3c, AUTO_NP_10XEN,
+ FIELD_PREP(AUTO_NP_10XEN, 0x1));
+
+ /* Enable HW auto downshift */
+ phy_modify_paged(phydev, MTK_PHY_PAGE_EXTENDED_1,
+ MTK_PHY_AUX_CTRL_AND_STATUS,
+ 0, MTK_PHY_ENABLE_DOWNSHIFT);
+
+ return 0;
+}
+
+static int mt798x_2p5ge_phy_config_aneg(struct phy_device *phydev)
+{
+ bool changed = false;
+ u32 adv;
+ int ret;
+
+ ret = genphy_c45_an_config_aneg(phydev);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ changed = true;
+
+ /* Clause 45 doesn't define 1000BaseT support. Use Clause 22 instead in
+ * our design.
+ */
+ adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
+ ret = phy_modify_changed(phydev, MII_CTRL1000, ADVERTISE_1000FULL, adv);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ changed = true;
+
+ return genphy_c45_check_and_restart_aneg(phydev, changed);
+}
+
+static int mt798x_2p5ge_phy_get_features(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = genphy_c45_pma_read_abilities(phydev);
+ if (ret)
+ return ret;
+
+ /* This phy can't handle collision, and neither can (XFI)MAC it's
+ * connected to. Although it can do HDX handshake, it doesn't support
+ * CSMA/CD that HDX requires.
+ */
+ linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
+ phydev->supported);
+
+ return 0;
+}
+
+static int mt798x_2p5ge_phy_read_status(struct phy_device *phydev)
+{
+ int ret;
+
+ /* When MDIO_STAT1_LSTATUS is raised genphy_c45_read_link(), this phy
+ * actually hasn't finished AN. So use CL22's link update function
+ * instead.
+ */
+ ret = genphy_update_link(phydev);
+ if (ret)
+ return ret;
+
+ phydev->speed = SPEED_UNKNOWN;
+ phydev->duplex = DUPLEX_UNKNOWN;
+ phydev->pause = 0;
+ phydev->asym_pause = 0;
+
+ /* We'll read link speed through vendor specific registers down below.
+ * So remove phy_resolve_aneg_linkmode (AN on) & genphy_c45_read_pma
+ * (AN off).
+ */
+ if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
+ ret = genphy_c45_read_lpa(phydev);
+ if (ret < 0)
+ return ret;
+
+ /* Clause 45 doesn't define 1000BaseT support. Read the link
+ * partner's 1G advertisement via Clause 22.
+ */
+ ret = phy_read(phydev, MII_STAT1000);
+ if (ret < 0)
+ return ret;
+ mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, ret);
+ } else if (phydev->autoneg == AUTONEG_DISABLE) {
+ linkmode_zero(phydev->lp_advertising);
+ }
+
+ if (phydev->link) {
+ ret = phy_read(phydev, PHY_AUX_CTRL_STATUS);
+ if (ret < 0)
+ return ret;
+
+ switch (FIELD_GET(PHY_AUX_SPEED_MASK, ret)) {
+ case PHY_AUX_SPD_10:
+ phydev->speed = SPEED_10;
+ break;
+ case PHY_AUX_SPD_100:
+ phydev->speed = SPEED_100;
+ break;
+ case PHY_AUX_SPD_1000:
+ phydev->speed = SPEED_1000;
+ break;
+ case PHY_AUX_SPD_2500:
+ phydev->speed = SPEED_2500;
+ break;
+ }
+
+ phydev->duplex = DUPLEX_FULL;
+ phydev->rate_matching = RATE_MATCH_PAUSE;
+ }
+
+ return 0;
+}
+
+static int mt798x_2p5ge_phy_get_rate_matching(struct phy_device *phydev,
+ phy_interface_t iface)
+{
+ return RATE_MATCH_PAUSE;
+}
+
+static int mt798x_2p5ge_phy_probe(struct phy_device *phydev)
+{
+ struct pinctrl *pinctrl;
+ int ret;
+
+ switch (phydev->drv->phy_id) {
+ case MTK_2P5GPHY_ID_MT7988:
+ /* This built-in 2.5GbE hardware only sets MDIO_DEVS_PMAPMD.
+ * Set the rest by this driver since PCS/AN/VEND1/VEND2 MDIO
+ * manageable devices actually exist.
+ */
+ phydev->c45_ids.mmds_present |= MDIO_DEVS_PCS |
+ MDIO_DEVS_AN |
+ MDIO_DEVS_VEND1 |
+ MDIO_DEVS_VEND2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = mt798x_2p5ge_phy_load_fw(phydev);
+ if (ret < 0)
+ return ret;
+
+ /* Setup LED */
+ phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MTK_PHY_LED0_ON_CTRL,
+ MTK_PHY_LED_ON_POLARITY | MTK_PHY_LED_ON_LINK10 |
+ MTK_PHY_LED_ON_LINK100 | MTK_PHY_LED_ON_LINK1000 |
+ MTK_PHY_LED_ON_LINK2500);
+ phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MTK_PHY_LED1_ON_CTRL,
+ MTK_PHY_LED_ON_FDX | MTK_PHY_LED_ON_HDX);
+
+ /* Switch pinctrl after setting polarity to avoid bogus blinking */
+ pinctrl = devm_pinctrl_get_select(&phydev->mdio.dev, "i2p5gbe-led");
+ if (IS_ERR(pinctrl))
+ dev_err(&phydev->mdio.dev, "Fail to set LED pins!\n");
+
+ return 0;
+}
+
+static struct phy_driver mtk_2p5gephy_driver[] = {
+ {
+ PHY_ID_MATCH_MODEL(MTK_2P5GPHY_ID_MT7988),
+ .name = "MediaTek MT7988 2.5GbE PHY",
+ .probe = mt798x_2p5ge_phy_probe,
+ .config_init = mt798x_2p5ge_phy_config_init,
+ .config_aneg = mt798x_2p5ge_phy_config_aneg,
+ .get_features = mt798x_2p5ge_phy_get_features,
+ .read_status = mt798x_2p5ge_phy_read_status,
+ .get_rate_matching = mt798x_2p5ge_phy_get_rate_matching,
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+ .read_page = mtk_phy_read_page,
+ .write_page = mtk_phy_write_page,
+ },
+};
+
+module_phy_driver(mtk_2p5gephy_driver);
+
+static struct mdio_device_id __maybe_unused mtk_2p5ge_phy_tbl[] = {
+ { PHY_ID_MATCH_VENDOR(0x00339c00) },
+ { }
+};
+
+MODULE_DESCRIPTION("MediaTek 2.5Gb Ethernet PHY driver");
+MODULE_AUTHOR("SkyLake Huang <SkyLake.Huang@mediatek.com>");
+MODULE_LICENSE("GPL");
+
+MODULE_DEVICE_TABLE(mdio, mtk_2p5ge_phy_tbl);
+MODULE_FIRMWARE(MT7988_2P5GE_PMB_FW);
projects / nvme.git / commitdiff