From 322a9598692943961791ac6e5a3f385b379dcdc3 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Mon, 14 Dec 2015 21:23:18 +0100 Subject: [PATCH 503/513] net-next: mediatek: add switch driver for mt7620 This driver is very basic and only provides basic init and irq support. Switchdev support for this device will follow. Signed-off-by: John Crispin --- drivers/net/ethernet/mediatek/gsw_mt7620.c | 255 ++++++++++++++++++++++++++++ drivers/net/ethernet/mediatek/gsw_mt7620.h | 117 +++++++++++++ 2 files changed, 372 insertions(+) create mode 100644 drivers/net/ethernet/mediatek/gsw_mt7620.c create mode 100644 drivers/net/ethernet/mediatek/gsw_mt7620.h diff --git a/drivers/net/ethernet/mediatek/gsw_mt7620.c b/drivers/net/ethernet/mediatek/gsw_mt7620.c new file mode 100644 index 0000000..a37ed1b --- /dev/null +++ b/drivers/net/ethernet/mediatek/gsw_mt7620.c @@ -0,0 +1,255 @@ +/* This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Copyright (C) 2009-2015 John Crispin + * Copyright (C) 2009-2015 Felix Fietkau + * Copyright (C) 2013-2015 Michael Lee + */ + +#include +#include +#include +#include +#include +#include + +#include + +#include "mtk_eth_soc.h" +#include "gsw_mt7620.h" + +void mtk_switch_w32(struct mt7620_gsw *gsw, u32 val, unsigned reg) +{ + iowrite32(val, gsw->base + reg); +} + +u32 mtk_switch_r32(struct mt7620_gsw *gsw, unsigned reg) +{ + return ioread32(gsw->base + reg); +} + +static irqreturn_t gsw_interrupt_mt7620(int irq, void *_priv) +{ + struct fe_priv *priv = (struct fe_priv *)_priv; + struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv; + u32 status; + int i, max = (gsw->port4 == PORT4_EPHY) ? (4) : (3); + + status = mtk_switch_r32(gsw, GSW_REG_ISR); + if (status & PORT_IRQ_ST_CHG) + for (i = 0; i <= max; i++) { + u32 status = mtk_switch_r32(gsw, GSW_REG_PORT_STATUS(i)); + int link = status & 0x1; + + if (link != priv->link[i]) + mt7620_print_link_state(priv, i, link, + (status >> 2) & 3, + (status & 0x2)); + + priv->link[i] = link; + } + mtk_switch_w32(gsw, status, GSW_REG_ISR); + + return IRQ_HANDLED; +} + +static void mt7620_hw_init(struct mt7620_gsw *gsw, struct device_node *np) +{ + u32 is_BGA = (rt_sysc_r32(0x0c) >> 16) & 1; + + rt_sysc_w32(rt_sysc_r32(SYSC_REG_CFG1) | BIT(8), SYSC_REG_CFG1); + mtk_switch_w32(gsw, mtk_switch_r32(gsw, GSW_REG_CKGCR) & ~(0x3 << 4), GSW_REG_CKGCR); + + if (of_property_read_bool(np, "mediatek,mt7530")) { + u32 val; + + /* turn off ephy and set phy base addr to 12 */ + mtk_switch_w32(gsw, mtk_switch_r32(gsw, GSW_REG_GPC1) | + (0x1f << 24) | (0xc << 16), + GSW_REG_GPC1); + + /* set MT7530 central align */ + val = mt7530_mdio_r32(gsw, 0x7830); + val &= ~BIT(0); + val |= BIT(1); + mt7530_mdio_w32(gsw, 0x7830, val); + + val = mt7530_mdio_r32(gsw, 0x7a40); + val &= ~BIT(30); + mt7530_mdio_w32(gsw, 0x7a40, val); + + mt7530_mdio_w32(gsw, 0x7a78, 0x855); + } else { + /* global page 4 */ + _mt7620_mii_write(gsw, 1, 31, 0x4000); + + _mt7620_mii_write(gsw, 1, 17, 0x7444); + if (is_BGA) + _mt7620_mii_write(gsw, 1, 19, 0x0114); + else + _mt7620_mii_write(gsw, 1, 19, 0x0117); + + _mt7620_mii_write(gsw, 1, 22, 0x10cf); + _mt7620_mii_write(gsw, 1, 25, 0x6212); + _mt7620_mii_write(gsw, 1, 26, 0x0777); + _mt7620_mii_write(gsw, 1, 29, 0x4000); + _mt7620_mii_write(gsw, 1, 28, 0xc077); + _mt7620_mii_write(gsw, 1, 24, 0x0000); + + /* global page 3 */ + _mt7620_mii_write(gsw, 1, 31, 0x3000); + _mt7620_mii_write(gsw, 1, 17, 0x4838); + + /* global page 2 */ + _mt7620_mii_write(gsw, 1, 31, 0x2000); + if (is_BGA) { + _mt7620_mii_write(gsw, 1, 21, 0x0515); + _mt7620_mii_write(gsw, 1, 22, 0x0053); + _mt7620_mii_write(gsw, 1, 23, 0x00bf); + _mt7620_mii_write(gsw, 1, 24, 0x0aaf); + _mt7620_mii_write(gsw, 1, 25, 0x0fad); + _mt7620_mii_write(gsw, 1, 26, 0x0fc1); + } else { + _mt7620_mii_write(gsw, 1, 21, 0x0517); + _mt7620_mii_write(gsw, 1, 22, 0x0fd2); + _mt7620_mii_write(gsw, 1, 23, 0x00bf); + _mt7620_mii_write(gsw, 1, 24, 0x0aab); + _mt7620_mii_write(gsw, 1, 25, 0x00ae); + _mt7620_mii_write(gsw, 1, 26, 0x0fff); + } + /* global page 1 */ + _mt7620_mii_write(gsw, 1, 31, 0x1000); + _mt7620_mii_write(gsw, 1, 17, 0xe7f8); + } + + /* global page 0 */ + _mt7620_mii_write(gsw, 1, 31, 0x8000); + _mt7620_mii_write(gsw, 0, 30, 0xa000); + _mt7620_mii_write(gsw, 1, 30, 0xa000); + _mt7620_mii_write(gsw, 2, 30, 0xa000); + _mt7620_mii_write(gsw, 3, 30, 0xa000); + + _mt7620_mii_write(gsw, 0, 4, 0x05e1); + _mt7620_mii_write(gsw, 1, 4, 0x05e1); + _mt7620_mii_write(gsw, 2, 4, 0x05e1); + _mt7620_mii_write(gsw, 3, 4, 0x05e1); + + /* global page 2 */ + _mt7620_mii_write(gsw, 1, 31, 0xa000); + _mt7620_mii_write(gsw, 0, 16, 0x1111); + _mt7620_mii_write(gsw, 1, 16, 0x1010); + _mt7620_mii_write(gsw, 2, 16, 0x1515); + _mt7620_mii_write(gsw, 3, 16, 0x0f0f); + + /* CPU Port6 Force Link 1G, FC ON */ + mtk_switch_w32(gsw, 0x5e33b, GSW_REG_PORT_PMCR(6)); + + /* Set Port 6 as CPU Port */ + mtk_switch_w32(gsw, 0x7f7f7fe0, 0x0010); + + /* setup port 4 */ + if (gsw->port4 == PORT4_EPHY) { + u32 val = rt_sysc_r32(SYSC_REG_CFG1); + + val |= 3 << 14; + rt_sysc_w32(val, SYSC_REG_CFG1); + _mt7620_mii_write(gsw, 4, 30, 0xa000); + _mt7620_mii_write(gsw, 4, 4, 0x05e1); + _mt7620_mii_write(gsw, 4, 16, 0x1313); + pr_info("gsw: setting port4 to ephy mode\n"); + } +} + +static const struct of_device_id mediatek_gsw_match[] = { + { .compatible = "mediatek,mt7620-gsw" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mediatek_gsw_match); + +int mtk_gsw_init(struct fe_priv *priv) +{ + struct device_node *np = priv->switch_np; + struct platform_device *pdev = of_find_device_by_node(np); + struct mt7620_gsw *gsw; + + if (!pdev) + return -ENODEV; + + if (!of_device_is_compatible(np, mediatek_gsw_match->compatible)) + return -EINVAL; + + gsw = platform_get_drvdata(pdev); + priv->soc->swpriv = gsw; + + mt7620_hw_init(gsw, np); + + if (gsw->irq) { + request_irq(gsw->irq, gsw_interrupt_mt7620, 0, + "gsw", priv); + mtk_switch_w32(gsw, ~PORT_IRQ_ST_CHG, GSW_REG_IMR); + } + + return 0; +} + +static int mt7620_gsw_probe(struct platform_device *pdev) +{ + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + const char *port4 = NULL; + struct mt7620_gsw *gsw; + struct device_node *np; + + gsw = devm_kzalloc(&pdev->dev, sizeof(struct mt7620_gsw), GFP_KERNEL); + if (!gsw) + return -ENOMEM; + + gsw->base = devm_ioremap_resource(&pdev->dev, res); + if (!gsw->base) + return -EADDRNOTAVAIL; + + gsw->dev = &pdev->dev; + + of_property_read_string(np, "mediatek,port4", &port4); + if (port4 && !strcmp(port4, "ephy")) + gsw->port4 = PORT4_EPHY; + else if (port4 && !strcmp(port4, "gmac")) + gsw->port4 = PORT4_EXT; + else + gsw->port4 = PORT4_EPHY; + + gsw->irq = irq_of_parse_and_map(np, 0); + + platform_set_drvdata(pdev, gsw); + + return 0; +} + +static int mt7620_gsw_remove(struct platform_device *pdev) +{ + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver gsw_driver = { + .probe = mt7620_gsw_probe, + .remove = mt7620_gsw_remove, + .driver = { + .name = "mt7620-gsw", + .owner = THIS_MODULE, + .of_match_table = mediatek_gsw_match, + }, +}; + +module_platform_driver(gsw_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("John Crispin "); +MODULE_DESCRIPTION("GBit switch driver for Mediatek MT7620 SoC"); +MODULE_VERSION(MTK_FE_DRV_VERSION); diff --git a/drivers/net/ethernet/mediatek/gsw_mt7620.h b/drivers/net/ethernet/mediatek/gsw_mt7620.h new file mode 100644 index 0000000..0d6ee84 --- /dev/null +++ b/drivers/net/ethernet/mediatek/gsw_mt7620.h @@ -0,0 +1,117 @@ +/* This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Copyright (C) 2009-2015 John Crispin + * Copyright (C) 2009-2015 Felix Fietkau + * Copyright (C) 2013-2015 Michael Lee + */ + +#ifndef _RALINK_GSW_MT7620_H__ +#define _RALINK_GSW_MT7620_H__ + +#define GSW_REG_PHY_TIMEOUT (5 * HZ) + +#ifdef CONFIG_SOC_MT7621 +#define MT7620A_GSW_REG_PIAC 0x0004 +#else +#define MT7620A_GSW_REG_PIAC 0x7004 +#endif + +#define GSW_NUM_VLANS 16 +#define GSW_NUM_VIDS 4096 +#define GSW_NUM_PORTS 7 +#define GSW_PORT6 6 + +#define GSW_MDIO_ACCESS BIT(31) +#define GSW_MDIO_READ BIT(19) +#define GSW_MDIO_WRITE BIT(18) +#define GSW_MDIO_START BIT(16) +#define GSW_MDIO_ADDR_SHIFT 20 +#define GSW_MDIO_REG_SHIFT 25 + +#define GSW_REG_PORT_PMCR(x) (0x3000 + (x * 0x100)) +#define GSW_REG_PORT_STATUS(x) (0x3008 + (x * 0x100)) +#define GSW_REG_SMACCR0 0x3fE4 +#define GSW_REG_SMACCR1 0x3fE8 +#define GSW_REG_CKGCR 0x3ff0 + +#define GSW_REG_IMR 0x7008 +#define GSW_REG_ISR 0x700c +#define GSW_REG_GPC1 0x7014 + +#define SYSC_REG_CHIP_REV_ID 0x0c +#define SYSC_REG_CFG1 0x14 +#define RST_CTRL_MCM BIT(2) +#define SYSC_PAD_RGMII2_MDIO 0x58 +#define SYSC_GPIO_MODE 0x60 + +#define PORT_IRQ_ST_CHG 0x7f + +#ifdef CONFIG_SOC_MT7621 +#define ESW_PHY_POLLING 0x0000 +#else +#define ESW_PHY_POLLING 0x7000 +#endif + +#define PMCR_IPG BIT(18) +#define PMCR_MAC_MODE BIT(16) +#define PMCR_FORCE BIT(15) +#define PMCR_TX_EN BIT(14) +#define PMCR_RX_EN BIT(13) +#define PMCR_BACKOFF BIT(9) +#define PMCR_BACKPRES BIT(8) +#define PMCR_RX_FC BIT(5) +#define PMCR_TX_FC BIT(4) +#define PMCR_SPEED(_x) (_x << 2) +#define PMCR_DUPLEX BIT(1) +#define PMCR_LINK BIT(0) + +#define PHY_AN_EN BIT(31) +#define PHY_PRE_EN BIT(30) +#define PMY_MDC_CONF(_x) ((_x & 0x3f) << 24) + +enum { + /* Global attributes. */ + GSW_ATTR_ENABLE_VLAN, + /* Port attributes. */ + GSW_ATTR_PORT_UNTAG, +}; + +enum { + PORT4_EPHY = 0, + PORT4_EXT, +}; + +struct mt7620_gsw { + struct device *dev; + void __iomem *base; + int irq; + int port4; + unsigned long int autopoll; +}; + +void mtk_switch_w32(struct mt7620_gsw *gsw, u32 val, unsigned reg); +u32 mtk_switch_r32(struct mt7620_gsw *gsw, unsigned reg); +int mtk_gsw_init(struct fe_priv *priv); + +int mt7620_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val); +int mt7620_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg); +void mt7620_mdio_link_adjust(struct fe_priv *priv, int port); +int mt7620_has_carrier(struct fe_priv *priv); +void mt7620_print_link_state(struct fe_priv *priv, int port, int link, + int speed, int duplex); + +void mt7530_mdio_w32(struct mt7620_gsw *gsw, u32 reg, u32 val); +u32 mt7530_mdio_r32(struct mt7620_gsw *gsw, u32 reg); + +u32 _mt7620_mii_write(struct mt7620_gsw *gsw, u32 phy_addr, + u32 phy_register, u32 write_data); +u32 _mt7620_mii_read(struct mt7620_gsw *gsw, int phy_addr, int phy_reg); + +#endif -- 1.7.10.4