developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (c) 2018-2019 MediaTek Inc. |
| 3 | |
| 4 | /* A library for configuring path from GMAC/GDM to target PHY |
| 5 | * |
| 6 | * Author: Sean Wang <sean.wang@mediatek.com> |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <linux/phy.h> |
| 11 | #include <linux/regmap.h> |
| 12 | |
| 13 | #include "mtk_eth_soc.h" |
| 14 | |
| 15 | struct mtk_eth_muxc { |
| 16 | const char *name; |
| 17 | int cap_bit; |
| 18 | int (*set_path)(struct mtk_eth *eth, int path); |
| 19 | }; |
| 20 | |
| 21 | static const char *mtk_eth_path_name(int path) |
| 22 | { |
| 23 | switch (path) { |
| 24 | case MTK_ETH_PATH_GMAC1_RGMII: |
| 25 | return "gmac1_rgmii"; |
| 26 | case MTK_ETH_PATH_GMAC1_TRGMII: |
| 27 | return "gmac1_trgmii"; |
| 28 | case MTK_ETH_PATH_GMAC1_SGMII: |
| 29 | return "gmac1_sgmii"; |
| 30 | case MTK_ETH_PATH_GMAC2_RGMII: |
| 31 | return "gmac2_rgmii"; |
| 32 | case MTK_ETH_PATH_GMAC2_SGMII: |
| 33 | return "gmac2_sgmii"; |
| 34 | case MTK_ETH_PATH_GMAC2_GEPHY: |
| 35 | return "gmac2_gephy"; |
| 36 | case MTK_ETH_PATH_GDM1_ESW: |
| 37 | return "gdm1_esw"; |
| 38 | default: |
| 39 | return "unknown path"; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, int path) |
| 44 | { |
| 45 | bool updated = true; |
| 46 | u32 val, mask, set; |
| 47 | |
| 48 | switch (path) { |
| 49 | case MTK_ETH_PATH_GMAC1_SGMII: |
| 50 | mask = ~(u32)MTK_MUX_TO_ESW; |
| 51 | set = 0; |
| 52 | break; |
| 53 | case MTK_ETH_PATH_GDM1_ESW: |
| 54 | mask = ~(u32)MTK_MUX_TO_ESW; |
| 55 | set = MTK_MUX_TO_ESW; |
| 56 | break; |
| 57 | default: |
| 58 | updated = false; |
| 59 | break; |
| 60 | }; |
| 61 | |
| 62 | if (updated) { |
| 63 | val = mtk_r32(eth, MTK_MAC_MISC); |
| 64 | val = (val & mask) | set; |
| 65 | mtk_w32(eth, val, MTK_MAC_MISC); |
| 66 | } |
| 67 | |
| 68 | dev_dbg(eth->dev, "path %s in %s updated = %d\n", |
| 69 | mtk_eth_path_name(path), __func__, updated); |
| 70 | |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static int set_mux_gmac2_gmac0_to_gephy(struct mtk_eth *eth, int path) |
| 75 | { |
| 76 | unsigned int val = 0; |
| 77 | bool updated = true; |
| 78 | |
| 79 | switch (path) { |
| 80 | case MTK_ETH_PATH_GMAC2_GEPHY: |
| 81 | val = ~(u32)GEPHY_MAC_SEL; |
| 82 | break; |
| 83 | default: |
| 84 | updated = false; |
| 85 | break; |
| 86 | } |
| 87 | |
| 88 | if (updated) |
| 89 | regmap_update_bits(eth->infra, INFRA_MISC2, GEPHY_MAC_SEL, val); |
| 90 | |
| 91 | dev_dbg(eth->dev, "path %s in %s updated = %d\n", |
| 92 | mtk_eth_path_name(path), __func__, updated); |
| 93 | |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, int path) |
| 98 | { |
| 99 | unsigned int val = 0; |
| 100 | bool updated = true; |
| 101 | |
| 102 | switch (path) { |
| 103 | case MTK_ETH_PATH_GMAC2_SGMII: |
| 104 | val = CO_QPHY_SEL; |
| 105 | break; |
| 106 | default: |
| 107 | updated = false; |
| 108 | break; |
| 109 | } |
| 110 | |
| 111 | if (updated) |
| 112 | regmap_update_bits(eth->infra, INFRA_MISC2, CO_QPHY_SEL, val); |
| 113 | |
| 114 | dev_dbg(eth->dev, "path %s in %s updated = %d\n", |
| 115 | mtk_eth_path_name(path), __func__, updated); |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, int path) |
| 121 | { |
| 122 | unsigned int val = 0; |
| 123 | bool updated = true; |
| 124 | |
| 125 | switch (path) { |
| 126 | case MTK_ETH_PATH_GMAC1_SGMII: |
| 127 | val = SYSCFG0_SGMII_GMAC1; |
| 128 | break; |
| 129 | case MTK_ETH_PATH_GMAC2_SGMII: |
| 130 | val = SYSCFG0_SGMII_GMAC2; |
| 131 | break; |
| 132 | case MTK_ETH_PATH_GMAC1_RGMII: |
| 133 | case MTK_ETH_PATH_GMAC2_RGMII: |
| 134 | regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); |
| 135 | val &= SYSCFG0_SGMII_MASK; |
| 136 | |
| 137 | if ((path == MTK_GMAC1_RGMII && val == SYSCFG0_SGMII_GMAC1) || |
| 138 | (path == MTK_GMAC2_RGMII && val == SYSCFG0_SGMII_GMAC2)) |
| 139 | val = 0; |
| 140 | else |
| 141 | updated = false; |
| 142 | break; |
| 143 | default: |
| 144 | updated = false; |
| 145 | break; |
| 146 | }; |
| 147 | |
| 148 | if (updated) |
| 149 | regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0, |
| 150 | SYSCFG0_SGMII_MASK, val); |
| 151 | |
| 152 | dev_dbg(eth->dev, "path %s in %s updated = %d\n", |
| 153 | mtk_eth_path_name(path), __func__, updated); |
| 154 | |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | static int set_mux_gmac12_to_gephy_sgmii(struct mtk_eth *eth, int path) |
| 159 | { |
| 160 | unsigned int val = 0; |
| 161 | bool updated = true; |
| 162 | |
| 163 | regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); |
| 164 | |
| 165 | switch (path) { |
| 166 | case MTK_ETH_PATH_GMAC1_SGMII: |
| 167 | val |= SYSCFG0_SGMII_GMAC1_V2; |
| 168 | break; |
| 169 | case MTK_ETH_PATH_GMAC2_GEPHY: |
| 170 | val &= ~(u32)SYSCFG0_SGMII_GMAC2_V2; |
| 171 | break; |
| 172 | case MTK_ETH_PATH_GMAC2_SGMII: |
| 173 | val |= SYSCFG0_SGMII_GMAC2_V2; |
| 174 | break; |
| 175 | default: |
| 176 | updated = false; |
| 177 | }; |
| 178 | |
| 179 | if (updated) |
| 180 | regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0, |
| 181 | SYSCFG0_SGMII_MASK, val); |
| 182 | |
| 183 | dev_dbg(eth->dev, "path %s in %s updated = %d\n", |
| 184 | mtk_eth_path_name(path), __func__, updated); |
| 185 | |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static const struct mtk_eth_muxc mtk_eth_muxc[] = { |
| 190 | { |
| 191 | .name = "mux_gdm1_to_gmac1_esw", |
| 192 | .cap_bit = MTK_ETH_MUX_GDM1_TO_GMAC1_ESW, |
| 193 | .set_path = set_mux_gdm1_to_gmac1_esw, |
| 194 | }, { |
| 195 | .name = "mux_gmac2_gmac0_to_gephy", |
| 196 | .cap_bit = MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY, |
| 197 | .set_path = set_mux_gmac2_gmac0_to_gephy, |
| 198 | }, { |
| 199 | .name = "mux_u3_gmac2_to_qphy", |
| 200 | .cap_bit = MTK_ETH_MUX_U3_GMAC2_TO_QPHY, |
| 201 | .set_path = set_mux_u3_gmac2_to_qphy, |
| 202 | }, { |
| 203 | .name = "mux_gmac1_gmac2_to_sgmii_rgmii", |
| 204 | .cap_bit = MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII, |
| 205 | .set_path = set_mux_gmac1_gmac2_to_sgmii_rgmii, |
| 206 | }, { |
| 207 | .name = "mux_gmac12_to_gephy_sgmii", |
| 208 | .cap_bit = MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII, |
| 209 | .set_path = set_mux_gmac12_to_gephy_sgmii, |
| 210 | }, |
| 211 | }; |
| 212 | |
| 213 | static int mtk_eth_mux_setup(struct mtk_eth *eth, int path) |
| 214 | { |
| 215 | int i, err = 0; |
| 216 | |
| 217 | if (!MTK_HAS_CAPS(eth->soc->caps, path)) { |
| 218 | dev_err(eth->dev, "path %s isn't support on the SoC\n", |
| 219 | mtk_eth_path_name(path)); |
| 220 | return -EINVAL; |
| 221 | } |
| 222 | |
| 223 | if (!MTK_HAS_CAPS(eth->soc->caps, MTK_MUX)) |
| 224 | return 0; |
| 225 | |
| 226 | /* Setup MUX in path fabric */ |
| 227 | for (i = 0; i < ARRAY_SIZE(mtk_eth_muxc); i++) { |
| 228 | if (MTK_HAS_CAPS(eth->soc->caps, mtk_eth_muxc[i].cap_bit)) { |
| 229 | err = mtk_eth_muxc[i].set_path(eth, path); |
| 230 | if (err) |
| 231 | goto out; |
| 232 | } else { |
| 233 | dev_dbg(eth->dev, "mux %s isn't present on the SoC\n", |
| 234 | mtk_eth_muxc[i].name); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | out: |
| 239 | return err; |
| 240 | } |
| 241 | |
| 242 | int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id) |
| 243 | { |
| 244 | int err, path; |
| 245 | |
| 246 | path = (mac_id == 0) ? MTK_ETH_PATH_GMAC1_SGMII : |
| 247 | MTK_ETH_PATH_GMAC2_SGMII; |
| 248 | |
| 249 | /* Setup proper MUXes along the path */ |
| 250 | err = mtk_eth_mux_setup(eth, path); |
| 251 | if (err) |
| 252 | return err; |
| 253 | |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id) |
| 258 | { |
| 259 | int err, path = 0; |
| 260 | |
| 261 | if (mac_id == 1) |
| 262 | path = MTK_ETH_PATH_GMAC2_GEPHY; |
| 263 | |
| 264 | if (!path) |
| 265 | return -EINVAL; |
| 266 | |
| 267 | /* Setup proper MUXes along the path */ |
| 268 | err = mtk_eth_mux_setup(eth, path); |
| 269 | if (err) |
| 270 | return err; |
| 271 | |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | int mtk_gmac_rgmii_path_setup(struct mtk_eth *eth, int mac_id) |
| 276 | { |
| 277 | int err, path; |
| 278 | |
| 279 | path = (mac_id == 0) ? MTK_ETH_PATH_GMAC1_RGMII : |
| 280 | MTK_ETH_PATH_GMAC2_RGMII; |
| 281 | |
| 282 | /* Setup proper MUXes along the path */ |
| 283 | err = mtk_eth_mux_setup(eth, path); |
| 284 | if (err) |
| 285 | return err; |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |