1/*- 2 * Copyright (c) 2013 Neel Natu <neel@freebsd.org> 3 * Copyright (c) 2013 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com> 4 * All rights reserved. 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, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD$"); 32 33#include <sys/types.h> 34 35#include <stdio.h> 36#include <stdlib.h> 37#include <string.h> 38 39#include "inout.h" 40#include "ioapic.h" 41#include "pci_emul.h" 42#include "uart_emul.h" 43 44static struct pci_devinst *lpc_bridge; 45 46#define LPC_UART_NUM 2 47static struct lpc_uart_softc { 48 struct uart_softc *uart_softc; 49 const char *opts; 50 int iobase; 51 int irq; 52} lpc_uart_softc[LPC_UART_NUM]; 53 54static const char *lpc_uart_names[LPC_UART_NUM] = { "COM1", "COM2" }; 55 56/* 57 * LPC device configuration is in the following form: 58 * <lpc_device_name>[,<options>] 59 * For e.g. "com1,stdio" 60 */ 61int 62lpc_device_parse(const char *opts) 63{ 64 int unit, error; 65 char *str, *cpy, *lpcdev; 66 67 error = -1; 68 str = cpy = strdup(opts); 69 lpcdev = strsep(&str, ","); 70 if (lpcdev != NULL) { 71 for (unit = 0; unit < LPC_UART_NUM; unit++) { 72 if (strcasecmp(lpcdev, lpc_uart_names[unit]) == 0) { 73 lpc_uart_softc[unit].opts = str; 74 error = 0; 75 goto done; 76 } 77 } 78 } 79 80done: 81 if (error) 82 free(cpy); 83 84 return (error); 85} 86 87static void 88lpc_uart_intr_assert(void *arg) 89{ 90 struct lpc_uart_softc *sc = arg; 91 92 assert(sc->irq >= 0); 93 94 ioapic_assert_pin(lpc_bridge->pi_vmctx, sc->irq); 95} 96 97static void 98lpc_uart_intr_deassert(void *arg) 99{ 100 struct lpc_uart_softc *sc = arg; 101 102 assert(sc->irq >= 0); 103 104 ioapic_deassert_pin(lpc_bridge->pi_vmctx, sc->irq); 105} 106 107static int 108lpc_uart_io_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, 109 uint32_t *eax, void *arg) 110{ 111 int offset; 112 struct lpc_uart_softc *sc = arg; 113 114 if (bytes != 1) 115 return (-1); 116 117 offset = port - sc->iobase; 118 119 if (in) 120 *eax = uart_read(sc->uart_softc, offset); 121 else 122 uart_write(sc->uart_softc, offset, *eax); 123 124 return (0); 125} 126 127static int 128lpc_init(void) 129{ 130 struct lpc_uart_softc *sc; 131 struct inout_port iop; 132 const char *name; 133 int unit, error; 134 135 /* COM1 and COM2 */ 136 for (unit = 0; unit < LPC_UART_NUM; unit++) { 137 sc = &lpc_uart_softc[unit]; 138 name = lpc_uart_names[unit]; 139 140 if (uart_legacy_alloc(unit, &sc->iobase, &sc->irq) != 0) { 141 fprintf(stderr, "Unable to allocate resources for " 142 "LPC device %s\n", name); 143 return (-1); 144 } 145 146 sc->uart_softc = uart_init(lpc_uart_intr_assert, 147 lpc_uart_intr_deassert, sc); 148 149 if (uart_set_backend(sc->uart_softc, sc->opts) != 0) { 150 fprintf(stderr, "Unable to initialize backend '%s' " 151 "for LPC device %s\n", sc->opts, name); 152 return (-1); 153 } 154 155 bzero(&iop, sizeof(struct inout_port)); 156 iop.name = name; 157 iop.port = sc->iobase; 158 iop.size = UART_IO_BAR_SIZE; 159 iop.flags = IOPORT_F_INOUT; 160 iop.handler = lpc_uart_io_handler; 161 iop.arg = sc; 162 163 error = register_inout(&iop); 164 assert(error == 0); 165 } 166 167 return (0); 168} 169 170static void 171pci_lpc_write(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, 172 int baridx, uint64_t offset, int size, uint64_t value) 173{ 174} 175 176uint64_t 177pci_lpc_read(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, 178 int baridx, uint64_t offset, int size) 179{ 180 return (0); 181} 182 183#define LPC_DEV 0x7000 184#define LPC_VENDOR 0x8086 185 186static int 187pci_lpc_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) 188{ 189 /* 190 * Do not allow more than one LPC bridge to be configured. 191 */ 192 if (lpc_bridge != NULL) 193 return (-1); 194 195 if (lpc_init() != 0) 196 return (-1); 197 198 /* initialize config space */ 199 pci_set_cfgdata16(pi, PCIR_DEVICE, LPC_DEV); 200 pci_set_cfgdata16(pi, PCIR_VENDOR, LPC_VENDOR); 201 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_BRIDGE); 202 pci_set_cfgdata8(pi, PCIR_SUBCLASS, PCIS_BRIDGE_ISA); 203 204 lpc_bridge = pi; 205 206 return (0); 207} 208 209struct pci_devemu pci_de_lpc = { 210 .pe_emu = "lpc", 211 .pe_init = pci_lpc_init, 212 .pe_barwrite = pci_lpc_write, 213 .pe_barread = pci_lpc_read 214}; 215PCI_EMUL_SET(pci_de_lpc); 216