1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 Robert N. M. Watson 5 * All rights reserved. 6 * 7 * This software was developed by SRI International and the University of 8 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 9 * ("CTSRD"), as part of the DARPA CRASH research programme. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/condvar.h> 36 #include <sys/conf.h> 37 #include <sys/bio.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/mutex.h> 43 #include <sys/rman.h> 44 #include <sys/systm.h> 45 #include <sys/taskqueue.h> 46 47 #include <machine/bus.h> 48 #include <machine/resource.h> 49 50 #include <geom/geom_disk.h> 51 52 #include <dev/altera/jtag_uart/altera_jtag_uart.h> 53 54 #include <dev/fdt/fdt_common.h> 55 #include <dev/ofw/openfirm.h> 56 #include <dev/ofw/ofw_bus.h> 57 #include <dev/ofw/ofw_bus_subr.h> 58 59 /* 60 * FDT bus attachment for Altera JTAG UARTs. 61 */ 62 static int 63 altera_jtag_uart_fdt_probe(device_t dev) 64 { 65 66 if (!ofw_bus_status_okay(dev)) 67 return (ENXIO); 68 69 if (ofw_bus_is_compatible(dev, "altera,jtag_uart-11_0")) { 70 device_set_desc(dev, "Altera JTAG UART"); 71 return (BUS_PROBE_DEFAULT); 72 } 73 return (ENXIO); 74 } 75 76 static int 77 altera_jtag_uart_fdt_attach(device_t dev) 78 { 79 struct altera_jtag_uart_softc *sc; 80 int error; 81 82 error = 0; 83 sc = device_get_softc(dev); 84 sc->ajus_dev = dev; 85 sc->ajus_unit = device_get_unit(dev); 86 sc->ajus_mem_rid = 0; 87 sc->ajus_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 88 &sc->ajus_mem_rid, RF_ACTIVE); 89 if (sc->ajus_mem_res == NULL) { 90 device_printf(dev, "couldn't map memory\n"); 91 error = ENXIO; 92 goto out; 93 } 94 95 /* 96 * Interrupt support is optional -- if we can't allocate an IRQ, then 97 * we fall back on polling. 98 */ 99 sc->ajus_irq_rid = 0; 100 sc->ajus_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 101 &sc->ajus_irq_rid, RF_ACTIVE | RF_SHAREABLE); 102 if (sc->ajus_irq_res == NULL) 103 device_printf(dev, 104 "IRQ unavailable; selecting polled operation\n"); 105 error = altera_jtag_uart_attach(sc); 106 out: 107 if (error) { 108 if (sc->ajus_irq_res != NULL) 109 bus_release_resource(dev, SYS_RES_IRQ, 110 sc->ajus_irq_rid, sc->ajus_irq_res); 111 if (sc->ajus_mem_res != NULL) 112 bus_release_resource(dev, SYS_RES_MEMORY, 113 sc->ajus_mem_rid, sc->ajus_mem_res); 114 } 115 return (error); 116 } 117 118 static int 119 altera_jtag_uart_fdt_detach(device_t dev) 120 { 121 struct altera_jtag_uart_softc *sc; 122 123 sc = device_get_softc(dev); 124 KASSERT(sc->ajus_mem_res != NULL, ("%s: resources not allocated", 125 __func__)); 126 127 altera_jtag_uart_detach(sc); 128 bus_release_resource(dev, SYS_RES_IRQ, sc->ajus_irq_rid, 129 sc->ajus_irq_res); 130 bus_release_resource(dev, SYS_RES_MEMORY, sc->ajus_mem_rid, 131 sc->ajus_mem_res); 132 return (0); 133 } 134 135 static device_method_t altera_jtag_uart_fdt_methods[] = { 136 DEVMETHOD(device_probe, altera_jtag_uart_fdt_probe), 137 DEVMETHOD(device_attach, altera_jtag_uart_fdt_attach), 138 DEVMETHOD(device_detach, altera_jtag_uart_fdt_detach), 139 { 0, 0 } 140 }; 141 142 static driver_t altera_jtag_uart_fdt_driver = { 143 "altera_jtag_uart", 144 altera_jtag_uart_fdt_methods, 145 sizeof(struct altera_jtag_uart_softc), 146 }; 147 148 DRIVER_MODULE(altera_jtag_uart, simplebus, altera_jtag_uart_fdt_driver, 0, 0); 149