imx6_usb.c revision 1.4.2.1
1 /* $NetBSD: imx6_usb.c,v 1.4.2.1 2021/03/22 02:00:55 thorpej 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 1.4.2.1 2021/03/22 02:00:55 thorpej 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 *); 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 *); 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" }, 78 { .compat = "fsl,imx7d-usb" }, 79 DEVICE_COMPAT_EOL 80 }; 81 82 static int 83 imx6_usb_match(device_t parent, cfdata_t cf, void *aux) 84 { 85 struct fdt_attach_args * const faa = aux; 86 87 return of_compatible_match(faa->faa_phandle, compat_data); 88 } 89 90 static void 91 imx6_usb_attach(device_t parent, device_t self, void *aux) 92 { 93 struct imxusbc_fdt_softc *ifsc = device_private(self); 94 struct imxusbc_softc *sc = &ifsc->sc_imxusbc; 95 struct fdt_attach_args * const faa = aux; 96 const int phandle = faa->faa_phandle; 97 bus_space_tag_t bst = faa->faa_bst; 98 bus_space_handle_t bsh; 99 bus_addr_t addr; 100 bus_size_t size; 101 int error; 102 103 aprint_naive("\n"); 104 aprint_normal("\n"); 105 106 ifsc->sc_phandle = phandle; 107 108 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 109 aprint_error(": couldn't get imxusbc registers\n"); 110 return; 111 } 112 113 error = bus_space_map(bst, addr, size, 0, &bsh); 114 if (error) { 115 aprint_error(": couldn't map %#" PRIxBUSADDR ": %d", addr, error); 116 return; 117 } 118 119 sc->sc_clk = fdtbus_clock_get_index(phandle, 0); 120 if (sc->sc_clk == NULL) { 121 aprint_error(": couldn't get clock\n"); 122 return; 123 } 124 125 sc->sc_init_md_hook = imx6_usb_init; 126 sc->sc_intr_establish_md_hook = imx6_usb_intr_establish; 127 sc->sc_setup_md_hook = NULL; 128 129 sc->sc_dev = self; 130 sc->sc_iot = bst; 131 sc->sc_ioh = bsh; 132 sc->sc_ehci_size = size; 133 sc->sc_ehci_offset = 0; 134 135 struct fdt_phandle_data data; 136 error = fdtbus_get_phandle_with_data(phandle, "fsl,usbmisc", 137 "#index-cells", 0, &data); 138 if (error) { 139 aprint_error(": couldn't get usbmisc property\n"); 140 return; 141 } 142 int unit = be32toh(data.values[0]); 143 144 if (fdtbus_get_reg(data.phandle, 0, &addr, &size) != 0) { 145 aprint_error(": couldn't get usbmisc registers\n"); 146 return; 147 } 148 error = bus_space_map(bst, addr, size, 0, &bsh); 149 if (error) { 150 aprint_error(": couldn't map usbmisc registers: %d\n", error); 151 return; 152 } 153 sc->sc_ioh_usbnc = bsh; 154 155 if (imx6_usb_init_clocks(sc) != 0) { 156 aprint_error_dev(self, "couldn't init clocks\n"); 157 return; 158 } 159 160 /* attach OTG/EHCI host controllers */ 161 struct imxusbc_attach_args iaa; 162 iaa.aa_iot = sc->sc_iot; 163 iaa.aa_ioh = sc->sc_ioh; 164 iaa.aa_dmat = faa->faa_dmat; 165 iaa.aa_unit = unit; 166 iaa.aa_irq = IMXUSBCCF_IRQ_DEFAULT; 167 config_found(self, &iaa, imxusbc_print, 168 CFARG_IATTR, "imxusbc", 169 CFARG_EOL); 170 171 return; 172 } 173 174 static int 175 imxusbc_print(void *aux, const char *name __unused) 176 { 177 struct imxusbc_attach_args *iaa; 178 179 iaa = (struct imxusbc_attach_args *)aux; 180 181 aprint_normal(" unit %d", iaa->aa_unit); 182 return UNCONF; 183 } 184 185 186 static int 187 imx6_usb_init_clocks(struct imxusbc_softc *sc) 188 { 189 int error; 190 191 error = clk_enable(sc->sc_clk); 192 if (error) { 193 aprint_error_dev(sc->sc_dev, "couldn't enable: %d\n", error); 194 return error; 195 } 196 197 return 0; 198 } 199 200 static void 201 imx6_usb_init(struct imxehci_softc *sc) 202 { 203 switch (sc->sc_unit) { 204 case 0: /* OTG controller */ 205 init_otg(sc); 206 break; 207 case 1: /* EHCI Host 1 */ 208 init_h1(sc); 209 break; 210 case 2: /* EHCI Host 2 */ 211 case 3: /* EHCI Host 3 */ 212 default: 213 aprint_error_dev(sc->sc_dev, "unit %d not supported\n", 214 sc->sc_unit); 215 } 216 } 217 218 static void 219 init_otg(struct imxehci_softc *sc) 220 { 221 struct imxusbc_softc *usbc = sc->sc_usbc; 222 uint32_t v; 223 224 sc->sc_iftype = IMXUSBC_IF_UTMI_WIDE; 225 226 imxehci_reset(sc); 227 228 v = bus_space_read_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_OTG_CTRL); 229 v |= USBNC_USB_OTG_CTRL_WKUP_VBUS_EN; 230 v |= USBNC_USB_OTG_CTRL_OVER_CUR_DIS; 231 v |= USBNC_USB_OTG_CTRL_PWR_POL; 232 v &= ~USBNC_USB_OTG_CTRL_UTMI_ON_CLOCK; 233 bus_space_write_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_OTG_CTRL, v); 234 } 235 236 static void 237 init_h1(struct imxehci_softc *sc) 238 { 239 struct imxusbc_softc *usbc = sc->sc_usbc; 240 uint32_t v; 241 242 sc->sc_iftype = IMXUSBC_IF_UTMI_WIDE; 243 244 v = bus_space_read_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_UH1_CTRL); 245 v |= USBNC_USB_UH1_CTRL_OVER_CUR_POL; 246 v |= USBNC_USB_UH1_CTRL_OVER_CUR_DIS; 247 bus_space_write_4(usbc->sc_iot, usbc->sc_ioh_usbnc, USBNC_USB_UH1_CTRL, v); 248 249 /* do reset */ 250 imxehci_reset(sc); 251 252 /* set mode */ 253 v = bus_space_read_4(usbc->sc_iot, usbc->sc_ioh, USBC_UH1_USBMODE); 254 v &= ~USBC_UH_USBMODE_CM; 255 v |= __SHIFTIN(USBC_UH_USBMODE_CM, USBC_UH_USBMODE_CM_HOST_CONTROLLER); 256 bus_space_write_4(usbc->sc_iot, usbc->sc_ioh, USBC_UH1_USBMODE, v); 257 } 258 259 static void * 260 imx6_usb_intr_establish(struct imxehci_softc *sc) 261 { 262 struct imxusbc_fdt_softc *ifsc = (struct imxusbc_fdt_softc *)sc->sc_usbc; 263 ehci_softc_t *hsc = &sc->sc_hsc; 264 void *ih; 265 266 char intrstr[128]; 267 if (!fdtbus_intr_str(ifsc->sc_phandle, 0, intrstr, sizeof(intrstr))) { 268 aprint_error_dev(sc->sc_dev, "failed to decode interrupt\n"); 269 return NULL; 270 } 271 ih = fdtbus_intr_establish_xname(ifsc->sc_phandle, 0, IPL_USB, 272 FDT_INTR_MPSAFE, ehci_intr, hsc, device_xname(sc->sc_dev)); 273 if (ih == NULL) { 274 aprint_error_dev(sc->sc_dev, "failed to establish interrupt on %s\n", 275 intrstr); 276 return NULL; 277 } 278 aprint_normal_dev(sc->sc_dev, "interrupting on %s\n", intrstr); 279 280 return ih; 281 } 282
Indexes created Thu Oct 02 07:10:07 GMT 2025