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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 | // SPDX-License-Identifier: GPL-2.0+ /* * Generic ULPI USB transceiver support * * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de> * * Based on sources from * * Sascha Hauer <s.hauer@pengutronix.de> * Freescale Semiconductors */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/export.h> #include <linux/usb.h> #include <linux/usb/otg.h> #include <linux/usb/ulpi.h> struct ulpi_info { unsigned int id; char *name; }; #define ULPI_ID(vendor, product) (((vendor) << 16) | (product)) #define ULPI_INFO(_id, _name) \ { \ .id = (_id), \ .name = (_name), \ } /* ULPI hardcoded IDs, used for probing */ static struct ulpi_info ulpi_ids[] = { ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"), ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"), ULPI_INFO(ULPI_ID(0x0424, 0x0007), "SMSC USB3320"), ULPI_INFO(ULPI_ID(0x0424, 0x0009), "SMSC USB334x"), ULPI_INFO(ULPI_ID(0x0451, 0x1507), "TI TUSB1210"), }; static int ulpi_set_otg_flags(struct usb_phy *phy) { unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN | ULPI_OTG_CTRL_DM_PULLDOWN; if (phy->flags & ULPI_OTG_ID_PULLUP) flags |= ULPI_OTG_CTRL_ID_PULLUP; /* * ULPI Specification rev.1.1 default * for Dp/DmPulldown is enabled. */ if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS) flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN; if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS) flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN; if (phy->flags & ULPI_OTG_EXTVBUSIND) flags |= ULPI_OTG_CTRL_EXTVBUSIND; return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); } static int ulpi_set_fc_flags(struct usb_phy *phy) { unsigned int flags = 0; /* * ULPI Specification rev.1.1 default * for XcvrSelect is Full Speed. */ if (phy->flags & ULPI_FC_HS) flags |= ULPI_FUNC_CTRL_HIGH_SPEED; else if (phy->flags & ULPI_FC_LS) flags |= ULPI_FUNC_CTRL_LOW_SPEED; else if (phy->flags & ULPI_FC_FS4LS) flags |= ULPI_FUNC_CTRL_FS4LS; else flags |= ULPI_FUNC_CTRL_FULL_SPEED; if (phy->flags & ULPI_FC_TERMSEL) flags |= ULPI_FUNC_CTRL_TERMSELECT; /* * ULPI Specification rev.1.1 default * for OpMode is Normal Operation. */ if (phy->flags & ULPI_FC_OP_NODRV) flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING; else if (phy->flags & ULPI_FC_OP_DIS_NRZI) flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI; else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP) flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP; else flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL; /* * ULPI Specification rev.1.1 default * for SuspendM is Powered. */ flags |= ULPI_FUNC_CTRL_SUSPENDM; return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL); } static int ulpi_set_ic_flags(struct usb_phy *phy) { unsigned int flags = 0; if (phy->flags & ULPI_IC_AUTORESUME) flags |= ULPI_IFC_CTRL_AUTORESUME; if (phy->flags & ULPI_IC_EXTVBUS_INDINV) flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS; if (phy->flags & ULPI_IC_IND_PASSTHRU) flags |= ULPI_IFC_CTRL_PASSTHRU; if (phy->flags & ULPI_IC_PROTECT_DIS) flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE; return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); } static int ulpi_set_flags(struct usb_phy *phy) { int ret; ret = ulpi_set_otg_flags(phy); if (ret) return ret; ret = ulpi_set_ic_flags(phy); if (ret) return ret; return ulpi_set_fc_flags(phy); } static int ulpi_check_integrity(struct usb_phy *phy) { int ret, i; unsigned int val = 0x55; for (i = 0; i < 2; i++) { ret = usb_phy_io_write(phy, val, ULPI_SCRATCH); if (ret < 0) return ret; ret = usb_phy_io_read(phy, ULPI_SCRATCH); if (ret < 0) return ret; if (ret != val) { pr_err("ULPI integrity check: failed!"); return -ENODEV; } val = val << 1; } pr_info("ULPI integrity check: passed.\n"); return 0; } static int ulpi_init(struct usb_phy *phy) { int i, vid, pid, ret; u32 ulpi_id = 0; for (i = 0; i < 4; i++) { ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i); if (ret < 0) return ret; ulpi_id = (ulpi_id << 8) | ret; } vid = ulpi_id & 0xffff; pid = ulpi_id >> 16; pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid); for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) { if (ulpi_ids[i].id == ULPI_ID(vid, pid)) { pr_info("Found %s ULPI transceiver.\n", ulpi_ids[i].name); break; } } ret = ulpi_check_integrity(phy); if (ret) return ret; return ulpi_set_flags(phy); } static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host) { struct usb_phy *phy = otg->usb_phy; unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL); if (!host) { otg->host = NULL; return 0; } otg->host = host; flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE | ULPI_IFC_CTRL_3_PIN_SERIAL_MODE | ULPI_IFC_CTRL_CARKITMODE); if (phy->flags & ULPI_IC_6PIN_SERIAL) flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE; else if (phy->flags & ULPI_IC_3PIN_SERIAL) flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE; else if (phy->flags & ULPI_IC_CARKIT) flags |= ULPI_IFC_CTRL_CARKITMODE; return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); } static int ulpi_set_vbus(struct usb_otg *otg, bool on) { struct usb_phy *phy = otg->usb_phy; unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL); flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT); if (on) { if (phy->flags & ULPI_OTG_DRVVBUS) flags |= ULPI_OTG_CTRL_DRVVBUS; if (phy->flags & ULPI_OTG_DRVVBUS_EXT) flags |= ULPI_OTG_CTRL_DRVVBUS_EXT; } return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); } static void otg_ulpi_init(struct usb_phy *phy, struct usb_otg *otg, struct usb_phy_io_ops *ops, unsigned int flags) { phy->label = "ULPI"; phy->flags = flags; phy->io_ops = ops; phy->otg = otg; phy->init = ulpi_init; otg->usb_phy = phy; otg->set_host = ulpi_set_host; otg->set_vbus = ulpi_set_vbus; } struct usb_phy * otg_ulpi_create(struct usb_phy_io_ops *ops, unsigned int flags) { struct usb_phy *phy; struct usb_otg *otg; phy = kzalloc(sizeof(*phy), GFP_KERNEL); if (!phy) return NULL; otg = kzalloc(sizeof(*otg), GFP_KERNEL); if (!otg) { kfree(phy); return NULL; } otg_ulpi_init(phy, otg, ops, flags); return phy; } EXPORT_SYMBOL_GPL(otg_ulpi_create); struct usb_phy * devm_otg_ulpi_create(struct device *dev, struct usb_phy_io_ops *ops, unsigned int flags) { struct usb_phy *phy; struct usb_otg *otg; phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); if (!phy) return NULL; otg = devm_kzalloc(dev, sizeof(*otg), GFP_KERNEL); if (!otg) { devm_kfree(dev, phy); return NULL; } otg_ulpi_init(phy, otg, ops, flags); return phy; } EXPORT_SYMBOL_GPL(devm_otg_ulpi_create); |