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/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/condvar.h> 39 #include <sys/conf.h> 40 #include <sys/bio.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/mutex.h> 46 #include <sys/rman.h> 47 #include <sys/systm.h> 48 #include <sys/taskqueue.h> 49 50 #include <machine/bus.h> 51 #include <machine/resource.h> 52 53 #include <geom/geom_disk.h> 54 55 #include <dev/altera/jtag_uart/altera_jtag_uart.h> 56 57 #include <dev/fdt/fdt_common.h> 58 #include <dev/ofw/openfirm.h> 59 #include <dev/ofw/ofw_bus.h> 60 #include <dev/ofw/ofw_bus_subr.h> 61 62 /* 63 * FDT bus attachment for Altera JTAG UARTs. 64 */ 65 static int 66 altera_jtag_uart_fdt_probe(device_t dev) 67 { 68 69 if (!ofw_bus_status_okay(dev)) 70 return (ENXIO); 71 72 if (ofw_bus_is_compatible(dev, "altera,jtag_uart-11_0")) { 73 device_set_desc(dev, "Altera JTAG UART"); 74 return (BUS_PROBE_DEFAULT); 75 } 76 return (ENXIO); 77 } 78 79 static int 80 altera_jtag_uart_fdt_attach(device_t dev) 81 { 82 struct altera_jtag_uart_softc *sc; 83 int error; 84 85 error = 0; 86 sc = device_get_softc(dev); 87 sc->ajus_dev = dev; 88 sc->ajus_unit = device_get_unit(dev); 89 sc->ajus_mem_rid = 0; 90 sc->ajus_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 91 &sc->ajus_mem_rid, RF_ACTIVE); 92 if (sc->ajus_mem_res == NULL) { 93 device_printf(dev, "couldn't map memory\n"); 94 error = ENXIO; 95 goto out; 96 } 97 98 /* 99 * Interrupt support is optional -- if we can't allocate an IRQ, then 100 * we fall back on polling. 101 */ 102 sc->ajus_irq_rid = 0; 103 sc->ajus_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 104 &sc->ajus_irq_rid, RF_ACTIVE | RF_SHAREABLE); 105 if (sc->ajus_irq_res == NULL) 106 device_printf(dev, 107 "IRQ unavailable; selecting polled operation\n"); 108 error = altera_jtag_uart_attach(sc); 109 out: 110 if (error) { 111 if (sc->ajus_irq_res != NULL) 112 bus_release_resource(dev, SYS_RES_IRQ, 113 sc->ajus_irq_rid, sc->ajus_irq_res); 114 if (sc->ajus_mem_res != NULL) 115 bus_release_resource(dev, SYS_RES_MEMORY, 116 sc->ajus_mem_rid, sc->ajus_mem_res); 117 } 118 return (error); 119 } 120 121 static int 122 altera_jtag_uart_fdt_detach(device_t dev) 123 { 124 struct altera_jtag_uart_softc *sc; 125 126 sc = device_get_softc(dev); 127 KASSERT(sc->ajus_mem_res != NULL, ("%s: resources not allocated", 128 __func__)); 129 130 altera_jtag_uart_detach(sc); 131 bus_release_resource(dev, SYS_RES_IRQ, sc->ajus_irq_rid, 132 sc->ajus_irq_res); 133 bus_release_resource(dev, SYS_RES_MEMORY, sc->ajus_mem_rid, 134 sc->ajus_mem_res); 135 return (0); 136 } 137 138 static device_method_t altera_jtag_uart_fdt_methods[] = { 139 DEVMETHOD(device_probe, altera_jtag_uart_fdt_probe), 140 DEVMETHOD(device_attach, altera_jtag_uart_fdt_attach), 141 DEVMETHOD(device_detach, altera_jtag_uart_fdt_detach), 142 { 0, 0 } 143 }; 144 145 static driver_t altera_jtag_uart_fdt_driver = { 146 "altera_jtag_uart", 147 altera_jtag_uart_fdt_methods, 148 sizeof(struct altera_jtag_uart_softc), 149 }; 150 151 DRIVER_MODULE(altera_jtag_uart, simplebus, altera_jtag_uart_fdt_driver, 0, 0); 152