1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2021, Adrian Chadd <adrian@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, 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/param.h> 30 #include <sys/systm.h> 31 32 #include <sys/bus.h> 33 #include <sys/interrupt.h> 34 #include <sys/malloc.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/rman.h> 40 #include <sys/gpio.h> 41 42 #include <vm/vm.h> 43 #include <vm/pmap.h> 44 #include <vm/vm_extern.h> 45 46 #include <machine/bus.h> 47 #include <machine/cpu.h> 48 49 #include <dev/fdt/fdt_common.h> 50 #include <dev/fdt/fdt_pinctrl.h> 51 52 #include <dev/gpio/gpiobusvar.h> 53 #include <dev/ofw/ofw_bus.h> 54 #include <dev/ofw/ofw_bus_subr.h> 55 56 #include <dev/qcom_tcsr/qcom_tcsr_var.h> 57 #include <dev/qcom_tcsr/qcom_tcsr_reg.h> 58 59 /* 60 * The linux-msm branches that support IPQ4018 use "ipq,tcsr". 61 * The openwrt addons use qcom,tcsr. So for now support both. 62 * 63 * Also, it's not quite clear yet (since this is the first port!) 64 * whether these options and registers are specific to the QCA IPQ401x 65 * part or show up in different linux branches as different registers 66 * but with the same driver/naming here. Let's hope that doesn't 67 * happen. 68 */ 69 static struct ofw_compat_data compat_data[] = { 70 { "qcom,tcsr", 1 }, 71 { "ipq,tcsr", 1 }, 72 { NULL, 0 } 73 }; 74 75 static int 76 qcom_tcsr_probe(device_t dev) 77 { 78 79 if (!ofw_bus_status_okay(dev)) 80 return (ENXIO); 81 82 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) 83 return (ENXIO); 84 85 device_set_desc(dev, "Qualcomm Core Top Control and Status Driver"); 86 return (BUS_PROBE_DEFAULT); 87 } 88 89 static int 90 qcom_tcsr_attach(device_t dev) 91 { 92 struct qcom_tcsr_softc *sc = device_get_softc(dev); 93 int rid, ret; 94 uint32_t val; 95 96 sc->sc_dev = dev; 97 98 /* 99 * Hardware version is stored in the ofw_compat_data table. 100 */ 101 sc->hw_version = 102 ofw_bus_search_compatible(dev, compat_data)->ocd_data; 103 104 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF); 105 106 rid = 0; 107 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 108 RF_ACTIVE); 109 if (!sc->sc_mem_res) { 110 device_printf(dev, "ERROR: Could not map memory\n"); 111 ret = ENXIO; 112 goto error; 113 } 114 115 /* 116 * Parse out the open firmware entries to see which particular 117 * configurations we need to set here. 118 */ 119 120 /* 121 * USB control select. 122 * 123 * For linux-msm on the IPQ401x, it actually calls into the SCM 124 * to make the change. OpenWRT just does a register write. 125 * We'll do the register write for now. 126 */ 127 if (OF_getencprop(ofw_bus_get_node(dev), "qcom,usb-ctrl-select", 128 &val, sizeof(val)) > 0) { 129 if (bootverbose) 130 device_printf(sc->sc_dev, 131 "USB control select (val 0x%x)\n", 132 val); 133 QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_USB_PORT_SEL, val); 134 } 135 136 /* 137 * USB high speed phy mode select. 138 */ 139 if (OF_getencprop(ofw_bus_get_node(dev), "qcom,usb-hsphy-mode-select", 140 &val, sizeof(val)) > 0) { 141 if (bootverbose) 142 device_printf(sc->sc_dev, 143 "USB high speed PHY mode select (val 0x%x)\n", 144 val); 145 QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_USB_HSPHY_CONFIG, val); 146 } 147 148 /* 149 * Ethernet switch subsystem interface type select. 150 */ 151 if (OF_getencprop(ofw_bus_get_node(dev), "qcom,ess-interface-select", 152 &val, sizeof(val)) > 0) { 153 uint32_t reg; 154 155 if (bootverbose) 156 device_printf(sc->sc_dev, 157 "ESS external interface select (val 0x%x)\n", 158 val); 159 reg = QCOM_TCSR_READ_4(sc, QCOM_TCSR_ESS_INTERFACE_SEL_OFFSET); 160 reg &= ~QCOM_TCSR_ESS_INTERFACE_SEL_MASK; 161 reg |= (val & QCOM_TCSR_ESS_INTERFACE_SEL_MASK); 162 QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_ESS_INTERFACE_SEL_OFFSET, reg); 163 } 164 165 /* 166 * WiFi GLB select. 167 */ 168 if (OF_getencprop(ofw_bus_get_node(dev), "qcom,wifi_glb_cfg", 169 &val, sizeof(val)) > 0) { 170 if (bootverbose) 171 device_printf(sc->sc_dev, 172 "WIFI GLB select (val 0x%x)\n", 173 val); 174 QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_WIFI0_GLB_CFG_OFFSET, val); 175 QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_WIFI1_GLB_CFG_OFFSET, val); 176 } 177 178 /* 179 * WiFi NOC interconnect memory type. 180 */ 181 if (OF_getencprop(ofw_bus_get_node(dev), 182 "qcom,wifi_noc_memtype_m0_m2", 183 &val, sizeof(val)) > 0) { 184 if (bootverbose) 185 device_printf(sc->sc_dev, 186 "WiFi NOC memory type (val 0x%x)\n", 187 val); 188 QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_PNOC_SNOC_MEMTYPE_M0_M2, val); 189 } 190 191 return (0); 192 193 error: 194 if (sc->sc_mem_res) 195 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 196 mtx_destroy(&sc->sc_mtx); 197 return (ret); 198 } 199 200 static int 201 qcom_tcsr_detach(device_t dev) 202 { 203 struct qcom_tcsr_softc *sc = device_get_softc(dev); 204 205 if (sc->sc_mem_res) 206 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 207 208 mtx_destroy(&sc->sc_mtx); 209 210 return (0); 211 } 212 213 static device_method_t qcom_tcsr_methods[] = { 214 /* Device interface */ 215 DEVMETHOD(device_probe, qcom_tcsr_probe), 216 DEVMETHOD(device_attach, qcom_tcsr_attach), 217 DEVMETHOD(device_detach, qcom_tcsr_detach), 218 219 DEVMETHOD_END 220 }; 221 222 static driver_t qcom_tcsr_driver = { 223 "qcom_tcsr", 224 qcom_tcsr_methods, 225 sizeof(struct qcom_tcsr_softc), 226 }; 227 228 /* 229 * This has to be run early, before the rest of the hardware is potentially 230 * probed/attached. 231 */ 232 EARLY_DRIVER_MODULE(qcom_tcsr, simplebus, qcom_tcsr_driver, 0, 0, 233 BUS_PASS_CPU + BUS_PASS_ORDER_EARLY); 234 SIMPLEBUS_PNP_INFO(compat_data); 235