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1 From f5d43ddd334b7c32fcaed9ba46afbd85cb467f1f Mon Sep 17 00:00:00 2001
2 From: Daniel Golle <daniel@makrotopia.org>
3 Date: Sun, 19 Mar 2023 12:56:28 +0000
4 Subject: [PATCH] net: ethernet: mtk_eth_soc: add support for MT7981 SoC
5
6 The MediaTek MT7981 SoC comes with two 1G/2.5G SGMII ports, just like
7 MT7986.
8
9 In addition MT7981 is equipped with a built-in 1000Base-T PHY which can
10 be used with GMAC1.
11
12 As many MT7981 boards make use of inverting SGMII signal polarity, add
13 new device-tree attribute 'mediatek,pn_swap' to support them.
14
15 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
16 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
17
18 --- a/drivers/net/ethernet/mediatek/mtk_eth_path.c
19 +++ b/drivers/net/ethernet/mediatek/mtk_eth_path.c
20 @@ -96,12 +96,20 @@ static int set_mux_gmac2_gmac0_to_gephy(
21
22 static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, int path)
23 {
24 - unsigned int val = 0;
25 + unsigned int val = 0, mask = 0, reg = 0;
26 bool updated = true;
27
28 switch (path) {
29 case MTK_ETH_PATH_GMAC2_SGMII:
30 - val = CO_QPHY_SEL;
31 + if (MTK_HAS_CAPS(eth->soc->caps, MTK_U3_COPHY_V2)) {
32 + reg = USB_PHY_SWITCH_REG;
33 + val = SGMII_QPHY_SEL;
34 + mask = QPHY_SEL_MASK;
35 + } else {
36 + reg = INFRA_MISC2;
37 + val = CO_QPHY_SEL;
38 + mask = val;
39 + }
40 break;
41 default:
42 updated = false;
43 @@ -109,7 +117,7 @@ static int set_mux_u3_gmac2_to_qphy(stru
44 }
45
46 if (updated)
47 - regmap_update_bits(eth->infra, INFRA_MISC2, CO_QPHY_SEL, val);
48 + regmap_update_bits(eth->infra, reg, mask, val);
49
50 dev_dbg(eth->dev, "path %s in %s updated = %d\n",
51 mtk_eth_path_name(path), __func__, updated);
52 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
53 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
54 @@ -4748,6 +4748,26 @@ static const struct mtk_soc_data mt7629_
55 },
56 };
57
58 +static const struct mtk_soc_data mt7981_data = {
59 + .reg_map = &mt7986_reg_map,
60 + .ana_rgc3 = 0x128,
61 + .caps = MT7981_CAPS,
62 + .hw_features = MTK_HW_FEATURES,
63 + .required_clks = MT7981_CLKS_BITMAP,
64 + .required_pctl = false,
65 + .offload_version = 2,
66 + .hash_offset = 4,
67 + .foe_entry_size = sizeof(struct mtk_foe_entry),
68 + .txrx = {
69 + .txd_size = sizeof(struct mtk_tx_dma_v2),
70 + .rxd_size = sizeof(struct mtk_rx_dma_v2),
71 + .rx_irq_done_mask = MTK_RX_DONE_INT_V2,
72 + .rx_dma_l4_valid = RX_DMA_L4_VALID_V2,
73 + .dma_max_len = MTK_TX_DMA_BUF_LEN_V2,
74 + .dma_len_offset = 8,
75 + },
76 +};
77 +
78 static const struct mtk_soc_data mt7986_data = {
79 .reg_map = &mt7986_reg_map,
80 .ana_rgc3 = 0x128,
81 @@ -4790,6 +4810,7 @@ const struct of_device_id of_mtk_match[]
82 { .compatible = "mediatek,mt7622-eth", .data = &mt7622_data},
83 { .compatible = "mediatek,mt7623-eth", .data = &mt7623_data},
84 { .compatible = "mediatek,mt7629-eth", .data = &mt7629_data},
85 + { .compatible = "mediatek,mt7981-eth", .data = &mt7981_data},
86 { .compatible = "mediatek,mt7986-eth", .data = &mt7986_data},
87 { .compatible = "ralink,rt5350-eth", .data = &rt5350_data},
88 {},
89 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
90 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
91 @@ -553,11 +553,22 @@
92 #define SGMSYS_QPHY_PWR_STATE_CTRL 0xe8
93 #define SGMII_PHYA_PWD BIT(4)
94
95 +/* Register to QPHY wrapper control */
96 +#define SGMSYS_QPHY_WRAP_CTRL 0xec
97 +#define SGMII_PN_SWAP_MASK GENMASK(1, 0)
98 +#define SGMII_PN_SWAP_TX_RX (BIT(0) | BIT(1))
99 +#define MTK_SGMII_FLAG_PN_SWAP BIT(0)
100 +
101 /* Infrasys subsystem config registers */
102 #define INFRA_MISC2 0x70c
103 #define CO_QPHY_SEL BIT(0)
104 #define GEPHY_MAC_SEL BIT(1)
105
106 +/* Top misc registers */
107 +#define USB_PHY_SWITCH_REG 0x218
108 +#define QPHY_SEL_MASK GENMASK(1, 0)
109 +#define SGMII_QPHY_SEL 0x2
110 +
111 /* MT7628/88 specific stuff */
112 #define MT7628_PDMA_OFFSET 0x0800
113 #define MT7628_SDM_OFFSET 0x0c00
114 @@ -738,6 +749,17 @@ enum mtk_clks_map {
115 BIT(MTK_CLK_SGMII2_CDR_FB) | \
116 BIT(MTK_CLK_SGMII_CK) | \
117 BIT(MTK_CLK_ETH2PLL) | BIT(MTK_CLK_SGMIITOP))
118 +#define MT7981_CLKS_BITMAP (BIT(MTK_CLK_FE) | BIT(MTK_CLK_GP2) | BIT(MTK_CLK_GP1) | \
119 + BIT(MTK_CLK_WOCPU0) | \
120 + BIT(MTK_CLK_SGMII_TX_250M) | \
121 + BIT(MTK_CLK_SGMII_RX_250M) | \
122 + BIT(MTK_CLK_SGMII_CDR_REF) | \
123 + BIT(MTK_CLK_SGMII_CDR_FB) | \
124 + BIT(MTK_CLK_SGMII2_TX_250M) | \
125 + BIT(MTK_CLK_SGMII2_RX_250M) | \
126 + BIT(MTK_CLK_SGMII2_CDR_REF) | \
127 + BIT(MTK_CLK_SGMII2_CDR_FB) | \
128 + BIT(MTK_CLK_SGMII_CK))
129 #define MT7986_CLKS_BITMAP (BIT(MTK_CLK_FE) | BIT(MTK_CLK_GP2) | BIT(MTK_CLK_GP1) | \
130 BIT(MTK_CLK_WOCPU1) | BIT(MTK_CLK_WOCPU0) | \
131 BIT(MTK_CLK_SGMII_TX_250M) | \
132 @@ -851,6 +873,7 @@ enum mkt_eth_capabilities {
133 MTK_NETSYS_V2_BIT,
134 MTK_SOC_MT7628_BIT,
135 MTK_RSTCTRL_PPE1_BIT,
136 + MTK_U3_COPHY_V2_BIT,
137
138 /* MUX BITS*/
139 MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT,
140 @@ -885,6 +908,7 @@ enum mkt_eth_capabilities {
141 #define MTK_NETSYS_V2 BIT(MTK_NETSYS_V2_BIT)
142 #define MTK_SOC_MT7628 BIT(MTK_SOC_MT7628_BIT)
143 #define MTK_RSTCTRL_PPE1 BIT(MTK_RSTCTRL_PPE1_BIT)
144 +#define MTK_U3_COPHY_V2 BIT(MTK_U3_COPHY_V2_BIT)
145
146 #define MTK_ETH_MUX_GDM1_TO_GMAC1_ESW \
147 BIT(MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT)
148 @@ -963,6 +987,11 @@ enum mkt_eth_capabilities {
149 MTK_MUX_U3_GMAC2_TO_QPHY | \
150 MTK_MUX_GMAC12_TO_GEPHY_SGMII | MTK_QDMA)
151
152 +#define MT7981_CAPS (MTK_GMAC1_SGMII | MTK_GMAC2_SGMII | MTK_GMAC2_GEPHY | \
153 + MTK_MUX_GMAC12_TO_GEPHY_SGMII | MTK_QDMA | \
154 + MTK_MUX_U3_GMAC2_TO_QPHY | MTK_U3_COPHY_V2 | \
155 + MTK_NETSYS_V2 | MTK_RSTCTRL_PPE1)
156 +
157 #define MT7986_CAPS (MTK_GMAC1_SGMII | MTK_GMAC2_SGMII | \
158 MTK_MUX_GMAC12_TO_GEPHY_SGMII | MTK_QDMA | \
159 MTK_NETSYS_V2 | MTK_RSTCTRL_PPE1)
160 @@ -1076,12 +1105,14 @@ struct mtk_soc_data {
161 * @ana_rgc3: The offset refers to register ANA_RGC3 related to regmap
162 * @interface: Currently configured interface mode
163 * @pcs: Phylink PCS structure
164 + * @flags: Flags indicating hardware properties
165 */
166 struct mtk_pcs {
167 struct regmap *regmap;
168 u32 ana_rgc3;
169 phy_interface_t interface;
170 struct phylink_pcs pcs;
171 + u32 flags;
172 };
173
174 /* struct mtk_sgmii - This is the structure holding sgmii regmap and its
175 --- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
176 +++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
177 @@ -87,6 +87,11 @@ static int mtk_pcs_config(struct phylink
178 regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_PWR_STATE_CTRL,
179 SGMII_PHYA_PWD, SGMII_PHYA_PWD);
180
181 + if (mpcs->flags & MTK_SGMII_FLAG_PN_SWAP)
182 + regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_WRAP_CTRL,
183 + SGMII_PN_SWAP_MASK,
184 + SGMII_PN_SWAP_TX_RX);
185 +
186 /* Reset SGMII PCS state */
187 regmap_update_bits(mpcs->regmap, SGMII_RESERVED_0,
188 SGMII_SW_RESET, SGMII_SW_RESET);
189 @@ -186,6 +191,11 @@ int mtk_sgmii_init(struct mtk_sgmii *ss,
190
191 ss->pcs[i].ana_rgc3 = ana_rgc3;
192 ss->pcs[i].regmap = syscon_node_to_regmap(np);
193 +
194 + ss->pcs[i].flags = 0;
195 + if (of_property_read_bool(np, "mediatek,pnswap"))
196 + ss->pcs[i].flags |= MTK_SGMII_FLAG_PN_SWAP;
197 +
198 of_node_put(np);
199 if (IS_ERR(ss->pcs[i].regmap))
200 return PTR_ERR(ss->pcs[i].regmap);
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