1 /* $NetBSD: imx6_usb.c,v 1.8 2023/05/04 17:09:45 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 Genetec Corporation. All rights reserved. 5 * Written by Hashimoto Kenichi for Genetec Corporation. 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: imx6_usb.c,v 1.8 2023/05/04 17:09:45 bouyer Exp $"); 31 32 #include "opt_fdt.h" 33 34 #include <locators.h> 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/conf.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/intr.h> 42 #include <sys/bus.h> 43 44 #include <dev/usb/usb.h> 45 #include <dev/usb/usbdi.h> 46 #include <dev/usb/usbdivar.h> 47 #include <dev/usb/usb_mem.h> 48 49 #include <dev/usb/ehcireg.h> 50 #include <dev/usb/ehcivar.h> 51 52 #include <arm/nxp/imx6_usbreg.h> 53 #include <arm/imx/imxusbvar.h> 54 55 #include <dev/fdt/fdtvar.h> 56 57 struct imxusbc_fdt_softc { 58 struct imxusbc_softc sc_imxusbc; /* Must be first */ 59 60 int sc_phandle; 61 }; 62 63 static int imx6_usb_match(device_t, struct cfdata *, void *); 64 static void imx6_usb_attach(device_t, device_t, void *); 65 static int imx6_usb_init_clocks(struct imxusbc_softc *); 66 static void imx6_usb_init(struct imxehci_softc *, uintptr_t); 67 static void init_otg(struct imxehci_softc *); 68 static void init_h1(struct imxehci_softc *); 69 static int imxusbc_print(void *, const char *); 70 static void *imx6_usb_intr_establish(struct imxehci_softc *, uintptr_t); 71 72 /* attach structures */ 73 CFATTACH_DECL_NEW(imxusbc_fdt, sizeof(struct imxusbc_fdt_softc), 74 imx6_usb_match, imx6_usb_attach, NULL, NULL); 75 76 static const struct device_compatible_entry compat_data[] = { 77 { .compat = "fsl,imx6q-usb", .value = 1 }, 78 { .compat = "fsl,imx6sx-usb", .value = 2 }, 79 { .compat = "fsl,imx7d-usb", .value = 1 }, 80 DEVICE_COMPAT_EOL 81 }; 82 83 static int 84 imx6_usb_match(device_t parent, cfdata_t cf, void *aux) 85 { 86 struct fdt_attach_args * const faa = aux; 87 88 return of_compatible_match(faa->faa_phandle, compat_data); 89 } 90 91 static void 92 imx6_usb_attach(device_t parent, device_t self, void *aux) 93 { 94 struct imxusbc_fdt_softc *ifsc = device_private(self); 95 struct imxusbc_softc *sc = &ifsc->sc_imxusbc; 96 struct fdt_attach_args * const faa = aux; 97 const int phandle = faa->faa_phandle; 98 bus_space_tag_t bst = faa->faa_bst; 99 bus_space_handle_t bsh; 100 bus_addr_t addr; 101 bus_size_t size; 102 int error; 103 struct fdtbus_regulator *reg; 104 105 aprint_naive("\n"); 106 aprint_normal("\n"); 107 108 ifsc->sc_phandle = phandle; 109 110 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 111 aprint_error(": couldn't get imxusbc registers\n"); 112 return; 113 } 114 115 error = bus_space_map(bst, addr, size, 0, &bsh); 116 if (error) { 117 aprint_error(": couldn't map %#" PRIxBUSADDR ": %d", addr, error); 118 return; 119 } 120 121 sc->sc_clk = fdtbus_clock_get_index(phandle, 0); 122 if (sc->sc_clk == NULL) { 123 aprint_error(": couldn't get clock\n"); 124 return; 125 } 126 127 sc->sc_init_md_hook = imx6_usb_init; 128 sc->sc_intr_establish_md_hook = imx6_usb_intr_establish; 129 sc->sc_setup_md_hook = NULL; 130 sc->sc_md_hook_data = of_compatible_lookup(phandle, compat_data)->value; 131 132 sc->sc_dev = self; 133 sc->sc_iot = bst; 134 sc->sc_ioh = bsh; 135 sc->sc_ehci_size = size; 136 sc->sc_ehci_offset = 0; 137 138 struct fdt_phandle_data data; 139 error = fdtbus_get_phandle_with_data(phandle, "fsl,usbmisc", 140 "#index-cells", 0, &data); 141 if (error) { 142 aprint_error(": couldn't get usbmisc property\n"); 143 return; 144 } 145 int unit = be32toh(data.values[0]); 146 147 if (fdtbus_get_reg(data.phandle, 0, &addr, &size) != 0) { 148 aprint_error(": couldn't get usbmisc registers\n"); 149 return; 150 } 151 error = bus_space_map(bst, addr, size, 0, &bsh); 152 if (error) { 153 aprint_error(": couldn't map usbmisc registers: %d\n", error); 154 return; 155 } 156 sc->sc_ioh_usbnc = bsh; 157 158 if (imx6_usb_init_clocks(sc) != 0) { 159 aprint_error_dev(self, "couldn't init clocks\n"); 160 return; 161 } 162 163 /* attach OTG/EHCI host controllers */ 164 struct imxusbc_attach_args iaa; 165 iaa.aa_iot = sc->sc_iot; 166 iaa.aa_ioh = sc->sc_ioh; 167 iaa.aa_dmat = faa->faa_dmat; 168 iaa.aa_unit = unit; 169 iaa.aa_irq = IMXUSBCCF_IRQ_DEFAULT; 170 config_found(self, &iaa, imxusbc_print, 171 CFARGS_NONE); 172 173 if (of_hasprop(phandle, "vbus-supply")) { 174 reg = fdtbus_regulator_acquire(phandle, "vbus-supply"); 175 if (reg == NULL) { 176 aprint_error_dev(self, 177 "couldn't acquire vbus-supply\n"); 178 } else { 179 error = fdtbus_regulator_enable(reg); 180 if (error != 0) { 181 aprint_error_dev(self, 182 "couldn't enable vbus-supply\n"); 183 } 184 } 185 } else { 186 aprint_verbose_dev(self, "no regulator\n"); 187 } 188 return; 189 } 190 191 static int 192 imxusbc_print(void *aux, const char *name __unused) 193 { 194 struct imxusbc_attach_args *iaa; 195 196 iaa = (struct imxusbc_attach_args *)aux; 197 198 aprint_normal(" unit %d", iaa->aa_unit); 199 return UNCONF; 200 } 201 202 203 static int 204 imx6_usb_init_clocks(struct imxusbc_softc *sc) 205 { 206 int error; 207 208 error = clk_enable(sc->sc_clk); 209 if (error) { 210 aprint_error_dev(sc->sc_dev, "couldn't enable: %d\n", error); 211 return error; 212 } 213 214 return 0; 215 } 216 217 static void 218 imx6_usb_init(struct imxehci_softc *sc, uintptr_t data) 219 { 220 int notg = data; 221 222 switch (sc->sc_unit) { 223 case 0: /* OTG controller */ 224 init_otg(sc); 225 break; 226 case 1: /* EHCI Host 1 */ 227 if (notg >= 2) 228 init_otg(sc); 229 else 230 init_h1(sc); 231 break; 232 case 2: /* EHCI Host 2 */ 233 case 3: /* EHCI Host 3 */ 234 default: 235 aprint_error_dev(sc->sc_dev, "unit %d not supported\n", 236 sc->sc_unit); 237 } 238 } 239 240 static void 241 init_otg(struct imxehci_softc *sc) 242 { 243 struct imxusbc_softc *usbc = sc->sc_usbc; 244 uint32_t v; 245 246 sc->sc_iftype = IMXUSBC_IF_UTMI_WIDE; 247 248 imxehci_reset(sc); 249 250 v = bus_space_read_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_OTG_CTRL); 251 v |= USBNC_USB_OTG_CTRL_WKUP_VBUS_EN; 252 v |= USBNC_USB_OTG_CTRL_OVER_CUR_DIS; 253 v |= USBNC_USB_OTG_CTRL_PWR_POL; 254 v &= ~USBNC_USB_OTG_CTRL_UTMI_ON_CLOCK; 255 bus_space_write_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_OTG_CTRL, v); 256 } 257 258 static void 259 init_h1(struct imxehci_softc *sc) 260 { 261 struct imxusbc_softc *usbc = sc->sc_usbc; 262 uint32_t v; 263 264 sc->sc_iftype = IMXUSBC_IF_UTMI_WIDE; 265 266 v = bus_space_read_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_UH1_CTRL); 267 v |= USBNC_USB_UH1_CTRL_OVER_CUR_POL; 268 v |= USBNC_USB_UH1_CTRL_OVER_CUR_DIS; 269 bus_space_write_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_UH1_CTRL, v); 270 271 /* do reset */ 272 imxehci_reset(sc); 273 274 /* set mode */ 275 v = bus_space_read_4(usbc->sc_iot, usbc->sc_ioh, USBC_UH1_USBMODE); 276 v &= ~USBC_UH_USBMODE_CM; 277 v |= __SHIFTIN(USBC_UH_USBMODE_CM, USBC_UH_USBMODE_CM_HOST_CONTROLLER); 278 bus_space_write_4(usbc->sc_iot, usbc->sc_ioh, USBC_UH1_USBMODE, v); 279 } 280 281 static void * 282 imx6_usb_intr_establish(struct imxehci_softc *sc, uintptr_t data) 283 { 284 struct imxusbc_fdt_softc *ifsc = (struct imxusbc_fdt_softc *)sc->sc_usbc; 285 ehci_softc_t *hsc = &sc->sc_hsc; 286 void *ih; 287 288 char intrstr[128]; 289 if (!fdtbus_intr_str(ifsc->sc_phandle, 0, intrstr, sizeof(intrstr))) { 290 aprint_error_dev(sc->sc_dev, "failed to decode interrupt\n"); 291 return NULL; 292 } 293 ih = fdtbus_intr_establish_xname(ifsc->sc_phandle, 0, IPL_USB, 294 FDT_INTR_MPSAFE, ehci_intr, hsc, device_xname(sc->sc_dev)); 295 if (ih == NULL) { 296 aprint_error_dev(sc->sc_dev, "failed to establish interrupt on %s\n", 297 intrstr); 298 return NULL; 299 } 300 aprint_normal_dev(sc->sc_dev, "interrupting on %s\n", intrstr); 301 302 return ih; 303 } 304
Indexes created Sat Sep 20 22:09:52 GMT 2025