diff options
author | Sean Wang <sean.wang@mediatek.com> | 2019-06-01 08:03:12 +0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-06-03 15:00:00 -0700 |
commit | 9ffee4a8276c734956b8eab19d1c9b0ecb6b79c5 (patch) | |
tree | 911d7962a30b6266d95be591e6d59120904dbc3d /drivers/net | |
parent | 3277fc683ae57f15b646b500c216e380821231c8 (diff) |
net: ethernet: mediatek: Extend SGMII related functions
Add SGMII related logic into a separate file, and also provides options for
forcing 1G, 2.5, AN mode for the target PHY, that can be determined from
SGMII node in DTS.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/ethernet/mediatek/Makefile | 2 | ||||
-rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.c | 75 | ||||
-rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.h | 39 | ||||
-rw-r--r-- | drivers/net/ethernet/mediatek/mtk_sgmii.c | 105 |
4 files changed, 184 insertions, 37 deletions
diff --git a/drivers/net/ethernet/mediatek/Makefile b/drivers/net/ethernet/mediatek/Makefile index d41a2414c575..b8206605154e 100644 --- a/drivers/net/ethernet/mediatek/Makefile +++ b/drivers/net/ethernet/mediatek/Makefile @@ -3,4 +3,4 @@ # Makefile for the Mediatek SoCs built-in ethernet macs # -obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth_soc.o +obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth_soc.o mtk_sgmii.o diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index f9fbb3ffa3a6..7ffb32ee9fae 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -165,36 +165,37 @@ static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, int speed) mtk_w32(eth, val, TRGMII_TCK_CTRL); } -static void mtk_gmac_sgmii_hw_setup(struct mtk_eth *eth, int mac_id) +static int mtk_gmac_sgmii_hw_setup(struct mtk_eth *eth, int mac_id) { + int sid, err; u32 val; - /* Setup the link timer and QPHY power up inside SGMIISYS */ - regmap_write(eth->sgmiisys, SGMSYS_PCS_LINK_TIMER, - SGMII_LINK_TIMER_DEFAULT); + /* Enable GMAC with SGMII once we finish the SGMII setup. */ + regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); + val &= ~SYSCFG0_SGMII_MASK; + regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); - regmap_read(eth->sgmiisys, SGMSYS_SGMII_MODE, &val); - val |= SGMII_REMOTE_FAULT_DIS; - regmap_write(eth->sgmiisys, SGMSYS_SGMII_MODE, val); + if (MTK_HAS_CAPS(eth->soc->caps, MTK_GMAC_SHARED_SGMII)) + sid = 0; + else + sid = mac_id; - regmap_read(eth->sgmiisys, SGMSYS_PCS_CONTROL_1, &val); - val |= SGMII_AN_RESTART; - regmap_write(eth->sgmiisys, SGMSYS_PCS_CONTROL_1, val); + if (MTK_HAS_FLAGS(eth->sgmii->flags[sid], MTK_SGMII_PHYSPEED_AN)) + err = mtk_sgmii_setup_mode_an(eth->sgmii, sid); + else + err = mtk_sgmii_setup_mode_force(eth->sgmii, sid); - regmap_read(eth->sgmiisys, SGMSYS_QPHY_PWR_STATE_CTRL, &val); - val &= ~SGMII_PHYA_PWD; - regmap_write(eth->sgmiisys, SGMSYS_QPHY_PWR_STATE_CTRL, val); + if (err) + return err; /* Determine MUX for which GMAC uses the SGMII interface */ - if (MTK_HAS_CAPS(eth->soc->caps, MTK_DUAL_GMAC_SHARED_SGMII)) { - regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); - val &= ~SYSCFG0_SGMII_MASK; - val |= !mac_id ? SYSCFG0_SGMII_GMAC1 : SYSCFG0_SGMII_GMAC2; - regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); - - dev_info(eth->dev, "setup shared sgmii for gmac=%d\n", - mac_id); - } + regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); + if (!mac_id) + val |= SYSCFG0_SGMII_GMAC1; + else + val |= MTK_HAS_CAPS(eth->soc->caps, MTK_GMAC_SHARED_SGMII) ? + SYSCFG0_SGMII_GMAC2 : SYSCFG0_SGMII_GMAC2_V2; + regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); /* Setup the GMAC1 going through SGMII path when SoC also support * ESW on GMAC1 @@ -204,6 +205,8 @@ static void mtk_gmac_sgmii_hw_setup(struct mtk_eth *eth, int mac_id) mtk_w32(eth, 0, MTK_MAC_MISC); dev_info(eth->dev, "setup gmac1 going through sgmii"); } + + return 0; } static void mtk_phy_link_adjust(struct net_device *dev) @@ -295,6 +298,7 @@ static int mtk_phy_connect(struct net_device *dev) struct mtk_eth *eth; struct device_node *np; u32 val; + int err; eth = mac->hw; np = of_parse_phandle(mac->of_node, "phy-handle", 0); @@ -314,8 +318,11 @@ static int mtk_phy_connect(struct net_device *dev) case PHY_INTERFACE_MODE_RGMII: break; case PHY_INTERFACE_MODE_SGMII: - if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) - mtk_gmac_sgmii_hw_setup(eth, mac->id); + if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { + err = mtk_gmac_sgmii_hw_setup(eth, mac->id); + if (err) + goto err_phy; + } break; case PHY_INTERFACE_MODE_MII: mac->ge_mode = 1; @@ -2483,13 +2490,16 @@ static int mtk_probe(struct platform_device *pdev) } if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { - eth->sgmiisys = - syscon_regmap_lookup_by_phandle(pdev->dev.of_node, - "mediatek,sgmiisys"); - if (IS_ERR(eth->sgmiisys)) { - dev_err(&pdev->dev, "no sgmiisys regmap found\n"); - return PTR_ERR(eth->sgmiisys); - } + eth->sgmii = devm_kzalloc(eth->dev, sizeof(*eth->sgmii), + GFP_KERNEL); + if (!eth->sgmii) + return -ENOMEM; + + err = mtk_sgmii_init(eth->sgmii, pdev->dev.of_node, + eth->soc->ana_rgc3); + + if (err) + return err; } if (eth->soc->required_pctl) { @@ -2642,7 +2652,8 @@ static const struct mtk_soc_data mt7621_data = { }; static const struct mtk_soc_data mt7622_data = { - .caps = MTK_DUAL_GMAC_SHARED_SGMII | MTK_GMAC1_ESW | MTK_HWLRO, + .ana_rgc3 = 0x2028, + .caps = MTK_GMAC_SHARED_SGMII | MTK_GMAC1_ESW | MTK_HWLRO, .required_clks = MT7622_CLKS_BITMAP, .required_pctl = false, }; diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index f7501997cea0..2e65115cf932 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -15,6 +15,10 @@ #ifndef MTK_ETH_H #define MTK_ETH_H +#include <linux/dma-mapping.h> +#include <linux/netdevice.h> +#include <linux/of_net.h> +#include <linux/u64_stats_sync.h> #include <linux/refcount.h> #define MTK_QDMA_PAGE_SIZE 2048 @@ -372,6 +376,7 @@ #define SYSCFG0_SGMII_MASK (3 << 8) #define SYSCFG0_SGMII_GMAC1 ((2 << 8) & GENMASK(9, 8)) #define SYSCFG0_SGMII_GMAC2 ((3 << 8) & GENMASK(9, 8)) +#define SYSCFG0_SGMII_GMAC2_V2 ((1 << 8) & GENMASK(9, 8)) /* ethernet subsystem clock register */ #define ETHSYS_CLKCFG0 0x2c @@ -567,7 +572,7 @@ struct mtk_rx_ring { #define MTK_SGMII BIT(8) #define MTK_GMAC1_SGMII (BIT(9) | MTK_SGMII) #define MTK_GMAC2_SGMII (BIT(10) | MTK_SGMII) -#define MTK_DUAL_GMAC_SHARED_SGMII (BIT(11) | MTK_GMAC1_SGMII | \ +#define MTK_GMAC_SHARED_SGMII (BIT(11) | MTK_GMAC1_SGMII | \ MTK_GMAC2_SGMII) #define MTK_HWLRO BIT(12) #define MTK_SHARED_INT BIT(13) @@ -575,6 +580,8 @@ struct mtk_rx_ring { /* struct mtk_eth_data - This is the structure holding all differences * among various plaforms + * @ana_rgc3: The offset for register ANA_RGC3 related to + * sgmiisys syscon * @caps Flags shown the extra capability for the SoC * @required_clks Flags shown the bitmap for required clocks on * the target SoC @@ -582,6 +589,7 @@ struct mtk_rx_ring { * the extra setup for those pins used by GMAC. */ struct mtk_soc_data { + u32 ana_rgc3; u32 caps; u32 required_clks; bool required_pctl; @@ -590,6 +598,26 @@ struct mtk_soc_data { /* currently no SoC has more than 2 macs */ #define MTK_MAX_DEVS 2 +#define MTK_SGMII_PHYSPEED_AN BIT(31) +#define MTK_SGMII_PHYSPEED_MASK GENMASK(0, 2) +#define MTK_SGMII_PHYSPEED_1000 BIT(0) +#define MTK_SGMII_PHYSPEED_2500 BIT(1) +#define MTK_HAS_FLAGS(flags, _x) (((flags) & (_x)) == (_x)) + +/* struct mtk_sgmii - This is the structure holding sgmii regmap and its + * characteristics + * @regmap: The register map pointing at the range used to setup + * SGMII modes + * @flags: The enum refers to which mode the sgmii wants to run on + * @ana_rgc3: The offset refers to register ANA_RGC3 related to regmap + */ + +struct mtk_sgmii { + struct regmap *regmap[MTK_MAX_DEVS]; + u32 flags[MTK_MAX_DEVS]; + u32 ana_rgc3; +}; + /* struct mtk_eth - This is the main datasructure for holding the state * of the driver * @dev: The device pointer @@ -605,8 +633,6 @@ struct mtk_soc_data { * @msg_enable: Ethtool msg level * @ethsys: The register map pointing at the range used to setup * MII modes - * @sgmiisys: The register map pointing at the range used to setup - * SGMII modes * @pctl: The register map pointing at the range used to setup * GMAC port drive/slew values * @dma_refcnt: track how many netdevs are using the DMA engine @@ -638,7 +664,7 @@ struct mtk_eth { u32 msg_enable; unsigned long sysclk; struct regmap *ethsys; - struct regmap *sgmiisys; + struct mtk_sgmii *sgmii; struct regmap *pctl; bool hwlro; refcount_t dma_refcnt; @@ -689,4 +715,9 @@ void mtk_stats_update_mac(struct mtk_mac *mac); void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg); u32 mtk_r32(struct mtk_eth *eth, unsigned reg); +int mtk_sgmii_init(struct mtk_sgmii *ss, struct device_node *np, + u32 ana_rgc3); +int mtk_sgmii_setup_mode_an(struct mtk_sgmii *ss, int id); +int mtk_sgmii_setup_mode_force(struct mtk_sgmii *ss, int id); + #endif /* MTK_ETH_H */ diff --git a/drivers/net/ethernet/mediatek/mtk_sgmii.c b/drivers/net/ethernet/mediatek/mtk_sgmii.c new file mode 100644 index 000000000000..136f90ce5a65 --- /dev/null +++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018-2019 MediaTek Inc. + +/* A library for MediaTek SGMII circuit + * + * Author: Sean Wang <sean.wang@mediatek.com> + * + */ + +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/regmap.h> + +#include "mtk_eth_soc.h" + +int mtk_sgmii_init(struct mtk_sgmii *ss, struct device_node *r, u32 ana_rgc3) +{ + struct device_node *np; + const char *str; + int i, err; + + ss->ana_rgc3 = ana_rgc3; + + for (i = 0; i < MTK_MAX_DEVS; i++) { + np = of_parse_phandle(r, "mediatek,sgmiisys", i); + if (!np) + break; + + ss->regmap[i] = syscon_node_to_regmap(np); + if (IS_ERR(ss->regmap[i])) + return PTR_ERR(ss->regmap[i]); + + err = of_property_read_string(np, "mediatek,physpeed", &str); + if (err) + return err; + + if (!strcmp(str, "2500")) + ss->flags[i] |= MTK_SGMII_PHYSPEED_2500; + else if (!strcmp(str, "1000")) + ss->flags[i] |= MTK_SGMII_PHYSPEED_1000; + else if (!strcmp(str, "auto")) + ss->flags[i] |= MTK_SGMII_PHYSPEED_AN; + else + return -EINVAL; + } + + return 0; +} + +int mtk_sgmii_setup_mode_an(struct mtk_sgmii *ss, int id) +{ + unsigned int val; + + if (!ss->regmap[id]) + return -EINVAL; + + /* Setup the link timer and QPHY power up inside SGMIISYS */ + regmap_write(ss->regmap[id], SGMSYS_PCS_LINK_TIMER, + SGMII_LINK_TIMER_DEFAULT); + + regmap_read(ss->regmap[id], SGMSYS_SGMII_MODE, &val); + val |= SGMII_REMOTE_FAULT_DIS; + regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val); + + regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val); + val |= SGMII_AN_RESTART; + regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val); + + regmap_read(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, &val); + val &= ~SGMII_PHYA_PWD; + regmap_write(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, val); + + return 0; +} + +int mtk_sgmii_setup_mode_force(struct mtk_sgmii *ss, int id) +{ + unsigned int val; + int mode; + + if (!ss->regmap[id]) + return -EINVAL; + + regmap_read(ss->regmap[id], ss->ana_rgc3, &val); + val &= ~GENMASK(2, 3); + mode = ss->flags[id] & MTK_SGMII_PHYSPEED_MASK; + val |= (mode == MTK_SGMII_PHYSPEED_1000) ? 0 : BIT(2); + regmap_write(ss->regmap[id], ss->ana_rgc3, val); + + /* Disable SGMII AN */ + regmap_read(ss->regmap[id], SGMSYS_PCS_CONTROL_1, &val); + val &= ~BIT(12); + regmap_write(ss->regmap[id], SGMSYS_PCS_CONTROL_1, val); + + /* SGMII force mode setting */ + val = 0x31120019; + regmap_write(ss->regmap[id], SGMSYS_SGMII_MODE, val); + + /* Release PHYA power down state */ + regmap_read(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, &val); + val &= ~SGMII_PHYA_PWD; + regmap_write(ss->regmap[id], SGMSYS_QPHY_PWR_STATE_CTRL, val); + + return 0; +} |