1 /* $NetBSD: dwc3_fdt.c,v 1.10 2020/03/26 00:21:27 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: dwc3_fdt.c,v 1.10 2020/03/26 00:21:27 thorpej Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/intr.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 39 #include <dev/usb/usb.h> 40 #include <dev/usb/usbdi.h> 41 #include <dev/usb/usbdivar.h> 42 #include <dev/usb/usb_mem.h> 43 #include <dev/usb/xhcireg.h> 44 #include <dev/usb/xhcivar.h> 45 46 #include <dev/fdt/fdtvar.h> 47 48 #define DWC3_GCTL 0xc110 49 #define GCTL_PRTCAP __BITS(13,12) 50 #define GCTL_PRTCAP_HOST 1 51 #define GCTL_PRTCAP_DEVICE 2 52 #define GCTL_PRTCAP_OTG 3 53 #define GCTL_CORESOFTRESET __BIT(11) 54 55 #define DWC3_GUCTL1 0xc11c 56 #define GUCTL1_TX_IPGAP_LINECHECK_DIS __BIT(28) 57 58 #define DWC3_SNPSID 0xc120 59 #define DWC3_SNPSID_REV __BITS(15,0) 60 61 #define DWC3_GUSB2PHYCFG(n) (0xc200 + ((n) * 4)) 62 #define GUSB2PHYCFG_PHYSOFTRST __BIT(31) 63 #define GUSB2PHYCFG_U2_FREECLK_EXISTS __BIT(30) 64 #define GUSB2PHYCFG_USBTRDTIM __BITS(13,10) 65 #define GUSB2PHYCFG_SUSPHY __BIT(6) 66 #define GUSB2PHYCFG_PHYIF __BIT(3) 67 #define GUSB2PHYCFG_ENBLSLPM __BIT(0) 68 69 #define DWC3_GUSB3PIPECTL(n) (0xc2c0 + ((n) * 4)) 70 #define GUSB3PIPECTL_PHYSOFTRST __BIT(31) 71 #define GUSB3PIPECTL_UX_EXIT_PX __BIT(27) 72 #define GUSB3PIPECTL_DEPOCHANGE __BIT(18) 73 #define GUSB3PIPECTL_SUSPHY __BIT(17) 74 75 #define DWC3_DCFG 0xc700 76 #define DCFG_SPEED __BITS(2,0) 77 #define DCFG_SPEED_HS 0 78 #define DCFG_SPEED_FS 1 79 #define DCFG_SPEED_LS 2 80 #define DCFG_SPEED_SS 4 81 #define DCFG_SPEED_SS_PLUS 5 82 83 static int dwc3_fdt_match(device_t, cfdata_t, void *); 84 static void dwc3_fdt_attach(device_t, device_t, void *); 85 86 CFATTACH_DECL2_NEW(dwc3_fdt, sizeof(struct xhci_softc), 87 dwc3_fdt_match, dwc3_fdt_attach, NULL, 88 xhci_activate, NULL, xhci_childdet); 89 90 #define RD4(sc, reg) \ 91 bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)) 92 #define WR4(sc, reg, val) \ 93 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 94 #define SET4(sc, reg, mask) \ 95 WR4((sc), (reg), RD4((sc), (reg)) | (mask)) 96 #define CLR4(sc, reg, mask) \ 97 WR4((sc), (reg), RD4((sc), (reg)) & ~(mask)) 98 99 static void 100 dwc3_fdt_soft_reset(struct xhci_softc *sc) 101 { 102 /* Put core in reset */ 103 SET4(sc, DWC3_GCTL, GCTL_CORESOFTRESET); 104 105 /* Assert USB3 PHY reset */ 106 SET4(sc, DWC3_GUSB3PIPECTL(0), GUSB3PIPECTL_PHYSOFTRST); 107 108 /* Assert USB2 PHY reset */ 109 SET4(sc, DWC3_GUSB2PHYCFG(0), GUSB2PHYCFG_PHYSOFTRST); 110 111 delay(100000); 112 113 /* Clear USB3 PHY reset */ 114 CLR4(sc, DWC3_GUSB3PIPECTL(0), GUSB3PIPECTL_PHYSOFTRST); 115 116 /* Clear USB2 PHY reset */ 117 CLR4(sc, DWC3_GUSB2PHYCFG(0), GUSB2PHYCFG_PHYSOFTRST); 118 119 delay(100000); 120 121 /* Take core out of reset */ 122 CLR4(sc, DWC3_GCTL, GCTL_CORESOFTRESET); 123 } 124 125 static void 126 dwc3_fdt_enable_phy(struct xhci_softc *sc, const int phandle, u_int rev) 127 { 128 const char *max_speed, *phy_type; 129 u_int phyif_utmi_bits; 130 uint32_t val; 131 132 val = RD4(sc, DWC3_GUSB2PHYCFG(0)); 133 if (of_getprop_uint32(phandle, "snps,phyif-utmi-bits", &phyif_utmi_bits) != 0) { 134 phy_type = fdtbus_get_string(phandle, "phy_type"); 135 if (phy_type && strcmp(phy_type, "utmi_wide") == 0) 136 phyif_utmi_bits = 16; 137 else if (phy_type && strcmp(phy_type, "utmi") == 0) 138 phyif_utmi_bits = 8; 139 else 140 phyif_utmi_bits = 0; 141 } 142 if (phyif_utmi_bits == 16) { 143 val |= GUSB2PHYCFG_PHYIF; 144 val &= ~GUSB2PHYCFG_USBTRDTIM; 145 val |= __SHIFTIN(5, GUSB2PHYCFG_USBTRDTIM); 146 } else if (phyif_utmi_bits == 8) { 147 val &= ~GUSB2PHYCFG_PHYIF; 148 val &= ~GUSB2PHYCFG_USBTRDTIM; 149 val |= __SHIFTIN(9, GUSB2PHYCFG_USBTRDTIM); 150 } 151 if (of_hasprop(phandle, "snps,dis-enblslpm-quirk") || 152 of_hasprop(phandle, "snps,dis_enblslpm_quirk")) 153 val &= ~GUSB2PHYCFG_ENBLSLPM; 154 if (of_hasprop(phandle, "snps,dis-u2-freeclk-exists-quirk")) 155 val &= ~GUSB2PHYCFG_U2_FREECLK_EXISTS; 156 if (of_hasprop(phandle, "snps,dis_u2_susphy_quirk")) 157 val &= ~GUSB2PHYCFG_SUSPHY; 158 WR4(sc, DWC3_GUSB2PHYCFG(0), val); 159 160 val = RD4(sc, DWC3_GUSB3PIPECTL(0)); 161 val &= ~GUSB3PIPECTL_UX_EXIT_PX; 162 if (of_hasprop(phandle, "snps,dis_u3_susphy_quirk")) 163 val &= ~GUSB3PIPECTL_SUSPHY; 164 if (of_hasprop(phandle, "snps,dis-del-phy-power-chg-quirk")) 165 val &= ~GUSB3PIPECTL_DEPOCHANGE; 166 WR4(sc, DWC3_GUSB3PIPECTL(0), val); 167 168 if (rev >= 0x250a) { 169 val = RD4(sc, DWC3_GUCTL1); 170 if (of_hasprop(phandle, "snps,dis-tx-ipgap-linecheck-quirk")) 171 val |= GUCTL1_TX_IPGAP_LINECHECK_DIS; 172 WR4(sc, DWC3_GUCTL1, val); 173 } 174 175 max_speed = fdtbus_get_string(phandle, "maximum-speed"); 176 if (max_speed == NULL) 177 max_speed = "super-speed"; 178 179 val = RD4(sc, DWC3_DCFG); 180 val &= ~DCFG_SPEED; 181 if (strcmp(max_speed, "low-speed") == 0) 182 val |= __SHIFTIN(DCFG_SPEED_LS, DCFG_SPEED); 183 else if (strcmp(max_speed, "full-speed") == 0) 184 val |= __SHIFTIN(DCFG_SPEED_FS, DCFG_SPEED); 185 else if (strcmp(max_speed, "high-speed") == 0) 186 val |= __SHIFTIN(DCFG_SPEED_HS, DCFG_SPEED); 187 else if (strcmp(max_speed, "super-speed") == 0) 188 val |= __SHIFTIN(DCFG_SPEED_SS, DCFG_SPEED); 189 else 190 val |= __SHIFTIN(DCFG_SPEED_SS, DCFG_SPEED); /* default to super speed */ 191 WR4(sc, DWC3_DCFG, val); 192 } 193 194 static void 195 dwc3_fdt_set_mode(struct xhci_softc *sc, u_int mode) 196 { 197 uint32_t val; 198 199 val = RD4(sc, DWC3_GCTL); 200 val &= ~GCTL_PRTCAP; 201 val |= __SHIFTIN(mode, GCTL_PRTCAP); 202 WR4(sc, DWC3_GCTL, val); 203 } 204 205 static int 206 dwc3_fdt_match(device_t parent, cfdata_t cf, void *aux) 207 { 208 const char * const compatible[] = { 209 "allwinner,sun50i-h6-dwc3", 210 "amlogic,meson-gxl-dwc3", 211 "fsl,imx8mq-dwc3", 212 "rockchip,rk3328-dwc3", 213 "rockchip,rk3399-dwc3", 214 "samsung,exynos5250-dwusb3", 215 "snps,dwc3", 216 NULL 217 }; 218 struct fdt_attach_args * const faa = aux; 219 220 return of_match_compatible(faa->faa_phandle, compatible); 221 } 222 223 static void 224 dwc3_fdt_attach(device_t parent, device_t self, void *aux) 225 { 226 const char * const dwc3_compatible[] = { "snps,dwc3", NULL }; 227 struct xhci_softc * const sc = device_private(self); 228 struct fdt_attach_args * const faa = aux; 229 const int phandle = faa->faa_phandle; 230 struct fdtbus_reset *rst; 231 struct fdtbus_phy *phy; 232 struct clk *clk; 233 char intrstr[128]; 234 bus_addr_t addr; 235 bus_size_t size; 236 int error, dwc3_phandle; 237 void *ih; 238 u_int n; 239 240 /* Find dwc3 sub-node */ 241 if (of_match_compatible(phandle, dwc3_compatible) > 0) { 242 dwc3_phandle = phandle; 243 } else { 244 dwc3_phandle = of_find_firstchild_byname(phandle, "dwc3"); 245 } 246 if (dwc3_phandle <= 0) { 247 aprint_error(": couldn't find dwc3 child node\n"); 248 return; 249 } 250 251 /* Only host mode is supported */ 252 const char *dr_mode = fdtbus_get_string(dwc3_phandle, "dr_mode"); 253 if (dr_mode == NULL || strcmp(dr_mode, "host") != 0) { 254 aprint_error(": '%s' not supported\n", dr_mode); 255 return; 256 } 257 258 /* Enable clocks */ 259 fdtbus_clock_assign(phandle); 260 for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++) 261 if (clk_enable(clk) != 0) { 262 aprint_error(": couldn't enable clock #%d\n", n); 263 return; 264 } 265 /* De-assert resets */ 266 for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++) 267 if (fdtbus_reset_deassert(rst) != 0) { 268 aprint_error(": couldn't de-assert reset #%d\n", n); 269 return; 270 } 271 272 /* Get resources */ 273 if (fdtbus_get_reg(dwc3_phandle, 0, &addr, &size) != 0) { 274 aprint_error(": couldn't get registers\n"); 275 return; 276 } 277 278 sc->sc_dev = self; 279 sc->sc_bus.ub_hcpriv = sc; 280 sc->sc_bus.ub_dmatag = faa->faa_dmat; 281 sc->sc_iot = faa->faa_bst; 282 if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh) != 0) { 283 aprint_error(": couldn't map registers\n"); 284 return; 285 } 286 287 aprint_naive("\n"); 288 aprint_normal(": DesignWare USB3 XHCI"); 289 const uint32_t snpsid = RD4(sc, DWC3_SNPSID); 290 const u_int rev = __SHIFTOUT(snpsid, DWC3_SNPSID_REV); 291 aprint_normal(" (rev. %d.%03x)\n", rev >> 12, rev & 0xfff); 292 293 /* Enable PHY devices */ 294 for (n = 0; (phy = fdtbus_phy_get_index(dwc3_phandle, n)) != NULL; n++) { 295 if (fdtbus_phy_enable(phy, true) != 0) 296 aprint_error_dev(self, "couldn't enable phy #%d\n", n); 297 } 298 299 dwc3_fdt_soft_reset(sc); 300 dwc3_fdt_enable_phy(sc, dwc3_phandle, rev); 301 dwc3_fdt_set_mode(sc, GCTL_PRTCAP_HOST); 302 303 if (!fdtbus_intr_str(dwc3_phandle, 0, intrstr, sizeof(intrstr))) { 304 aprint_error_dev(self, "failed to decode interrupt\n"); 305 return; 306 } 307 308 ih = fdtbus_intr_establish(dwc3_phandle, 0, IPL_USB, FDT_INTR_MPSAFE, 309 xhci_intr, sc); 310 if (ih == NULL) { 311 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 312 intrstr); 313 return; 314 } 315 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 316 317 sc->sc_bus.ub_revision = USBREV_3_0; 318 error = xhci_init(sc); 319 if (error) { 320 aprint_error_dev(self, "init failed, error = %d\n", error); 321 return; 322 } 323 324 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint); 325 sc->sc_child2 = config_found(self, &sc->sc_bus2, usbctlprint); 326 } 327