1/*- 2 * Copyright (c) 2012 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34#include <sys/param.h> 35#include <sys/bus.h> 36#include <sys/condvar.h> 37#include <sys/conf.h> 38#include <sys/bio.h> 39#include <sys/kernel.h> 40#include <sys/lock.h> 41#include <sys/malloc.h> 42#include <sys/module.h> 43#include <sys/mutex.h> 44#include <sys/rman.h> 45#include <sys/systm.h> 46#include <sys/taskqueue.h> 47 48#include <machine/bus.h> 49#include <machine/resource.h> 50 51#include <geom/geom_disk.h> 52 53#include <dev/altera/jtag_uart/altera_jtag_uart.h> 54 55#include <dev/fdt/fdt_common.h> 56#include <dev/ofw/openfirm.h> 57#include <dev/ofw/ofw_bus.h> 58#include <dev/ofw/ofw_bus_subr.h> 59 60/* 61 * FDT bus attachment for Altera JTAG UARTs. 62 */ 63static int 64altera_jtag_uart_fdt_probe(device_t dev) 65{ 66 67 if (!ofw_bus_status_okay(dev)) 68 return (ENXIO); 69 70 if (ofw_bus_is_compatible(dev, "altera,jtag_uart-11_0")) { 71 device_set_desc(dev, "Altera JTAG UART"); 72 return (BUS_PROBE_DEFAULT); 73 } 74 return (ENXIO); 75} 76 77static int 78altera_jtag_uart_fdt_attach(device_t dev) 79{ 80 struct altera_jtag_uart_softc *sc; 81 int error; 82 83 error = 0; 84 sc = device_get_softc(dev); 85 sc->ajus_dev = dev; 86 sc->ajus_unit = device_get_unit(dev); 87 sc->ajus_mem_rid = 0; 88 sc->ajus_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 89 &sc->ajus_mem_rid, RF_ACTIVE); 90 if (sc->ajus_mem_res == NULL) { 91 device_printf(dev, "couldn't map memory\n"); 92 error = ENXIO; 93 goto out; 94 } 95 96 /* 97 * Interrupt support is optional -- if we can't allocate an IRQ, then 98 * we fall back on polling. 99 */ 100 sc->ajus_irq_rid = 0; 101 sc->ajus_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 102 &sc->ajus_irq_rid, RF_ACTIVE | RF_SHAREABLE); 103 if (sc->ajus_irq_res == NULL) 104 device_printf(dev, 105 "IRQ unavailable; selecting polled operation\n"); 106 error = altera_jtag_uart_attach(sc); 107out: 108 if (error) { 109 if (sc->ajus_irq_res != NULL) 110 bus_release_resource(dev, SYS_RES_IRQ, 111 sc->ajus_irq_rid, sc->ajus_irq_res); 112 if (sc->ajus_mem_res != NULL) 113 bus_release_resource(dev, SYS_RES_MEMORY, 114 sc->ajus_mem_rid, sc->ajus_mem_res); 115 } 116 return (error); 117} 118 119static int 120altera_jtag_uart_fdt_detach(device_t dev) 121{ 122 struct altera_jtag_uart_softc *sc; 123 124 sc = device_get_softc(dev); 125 KASSERT(sc->ajus_mem_res != NULL, ("%s: resources not allocated", 126 __func__)); 127 128 altera_jtag_uart_detach(sc); 129 bus_release_resource(dev, SYS_RES_IRQ, sc->ajus_irq_rid, 130 sc->ajus_irq_res); 131 bus_release_resource(dev, SYS_RES_MEMORY, sc->ajus_mem_rid, 132 sc->ajus_mem_res); 133 return (0); 134} 135 136static device_method_t altera_jtag_uart_fdt_methods[] = { 137 DEVMETHOD(device_probe, altera_jtag_uart_fdt_probe), 138 DEVMETHOD(device_attach, altera_jtag_uart_fdt_attach), 139 DEVMETHOD(device_detach, altera_jtag_uart_fdt_detach), 140 { 0, 0 } 141}; 142 143static driver_t altera_jtag_uart_fdt_driver = { 144 "altera_jtag_uart", 145 altera_jtag_uart_fdt_methods, 146 sizeof(struct altera_jtag_uart_softc), 147}; 148 149DRIVER_MODULE(altera_jtag_uart, simplebus, altera_jtag_uart_fdt_driver, 150 altera_jtag_uart_devclass, 0, 0); 151