ppb_base.c revision 187576
1/*- 2 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/dev/ppbus/ppb_base.c 187576 2009-01-21 23:10:06Z jhb $"); 29 30#include <sys/param.h> 31#include <sys/lock.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/mutex.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37 38#include <dev/ppbus/ppbconf.h> 39 40#include "ppbus_if.h" 41 42#include <dev/ppbus/ppbio.h> 43 44MODULE_VERSION(ppbus, 1); 45 46#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev)) 47 48/* 49 * ppb_poll_bus() 50 * 51 * Polls the bus 52 * 53 * max is a delay in 10-milliseconds 54 */ 55int 56ppb_poll_bus(device_t bus, int max, 57 char mask, char status, int how) 58{ 59 struct ppb_data *ppb = DEVTOSOFTC(bus); 60 int i, j, error; 61 char r; 62 63 mtx_assert(ppb->ppc_lock, MA_OWNED); 64 65 /* try at least up to 10ms */ 66 for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) { 67 for (i = 0; i < 10000; i++) { 68 r = ppb_rstr(bus); 69 DELAY(1); 70 if ((r & mask) == status) 71 return (0); 72 } 73 } 74 75 if (!(how & PPB_POLL)) { 76 for (i = 0; max == PPB_FOREVER || i < max-1; i++) { 77 if ((ppb_rstr(bus) & mask) == status) 78 return (0); 79 80 /* wait 10 ms */ 81 error = mtx_sleep((caddr_t)bus, ppb->ppc_lock, PPBPRI | 82 (how == PPB_NOINTR ? 0 : PCATCH), "ppbpoll", hz/100); 83 if (error != EWOULDBLOCK) 84 return (error); 85 } 86 } 87 88 return (EWOULDBLOCK); 89} 90 91/* 92 * ppb_get_epp_protocol() 93 * 94 * Return the chipset EPP protocol 95 */ 96int 97ppb_get_epp_protocol(device_t bus) 98{ 99#ifdef INVARIANTS 100 struct ppb_data *ppb = DEVTOSOFTC(bus); 101#endif 102 uintptr_t protocol; 103 104 mtx_assert(ppb->ppc_lock, MA_OWNED); 105 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol); 106 107 return (protocol); 108} 109 110/* 111 * ppb_get_mode() 112 * 113 */ 114int 115ppb_get_mode(device_t bus) 116{ 117 struct ppb_data *ppb = DEVTOSOFTC(bus); 118 119 /* XXX yet device mode = ppbus mode = chipset mode */ 120 mtx_assert(ppb->ppc_lock, MA_OWNED); 121 return (ppb->mode); 122} 123 124/* 125 * ppb_set_mode() 126 * 127 * Set the operating mode of the chipset, return the previous mode 128 */ 129int 130ppb_set_mode(device_t bus, int mode) 131{ 132 struct ppb_data *ppb = DEVTOSOFTC(bus); 133 int old_mode = ppb_get_mode(bus); 134 135 mtx_assert(ppb->ppc_lock, MA_OWNED); 136 if (PPBUS_SETMODE(device_get_parent(bus), mode)) 137 return (-1); 138 139 /* XXX yet device mode = ppbus mode = chipset mode */ 140 ppb->mode = (mode & PPB_MASK); 141 142 return (old_mode); 143} 144 145/* 146 * ppb_write() 147 * 148 * Write charaters to the port 149 */ 150int 151ppb_write(device_t bus, char *buf, int len, int how) 152{ 153#ifdef INVARIANTS 154 struct ppb_data *ppb = DEVTOSOFTC(bus); 155#endif 156 157 mtx_assert(ppb->ppc_lock, MA_OWNED); 158 return (PPBUS_WRITE(device_get_parent(bus), buf, len, how)); 159} 160 161/* 162 * ppb_reset_epp_timeout() 163 * 164 * Reset the EPP timeout bit in the status register 165 */ 166int 167ppb_reset_epp_timeout(device_t bus) 168{ 169#ifdef INVARIANTS 170 struct ppb_data *ppb = DEVTOSOFTC(bus); 171#endif 172 173 mtx_assert(ppb->ppc_lock, MA_OWNED); 174 return(PPBUS_RESET_EPP(device_get_parent(bus))); 175} 176 177/* 178 * ppb_ecp_sync() 179 * 180 * Wait for the ECP FIFO to be empty 181 */ 182int 183ppb_ecp_sync(device_t bus) 184{ 185#ifdef INVARIANTS 186 struct ppb_data *ppb = DEVTOSOFTC(bus); 187#endif 188 189 mtx_assert(ppb->ppc_lock, MA_OWNED); 190 return (PPBUS_ECP_SYNC(device_get_parent(bus))); 191} 192 193/* 194 * ppb_get_status() 195 * 196 * Read the status register and update the status info 197 */ 198int 199ppb_get_status(device_t bus, struct ppb_status *status) 200{ 201#ifdef INVARIANTS 202 struct ppb_data *ppb = DEVTOSOFTC(bus); 203#endif 204 register char r; 205 206 mtx_assert(ppb->ppc_lock, MA_OWNED); 207 208 r = status->status = ppb_rstr(bus); 209 210 status->timeout = r & TIMEOUT; 211 status->error = !(r & nFAULT); 212 status->select = r & SELECT; 213 status->paper_end = r & PERROR; 214 status->ack = !(r & nACK); 215 status->busy = !(r & nBUSY); 216 217 return (0); 218} 219 220void 221ppb_lock(device_t bus) 222{ 223 struct ppb_data *ppb = DEVTOSOFTC(bus); 224 225 mtx_lock(ppb->ppc_lock); 226} 227 228void 229ppb_unlock(device_t bus) 230{ 231 struct ppb_data *ppb = DEVTOSOFTC(bus); 232 233 mtx_unlock(ppb->ppc_lock); 234} 235 236void 237_ppb_assert_locked(device_t bus, const char *file, int line) 238{ 239#ifdef INVARIANTS 240 struct ppb_data *ppb = DEVTOSOFTC(bus); 241 242 _mtx_assert(ppb->ppc_lock, MA_OWNED, file, line); 243#endif 244} 245 246void 247ppb_init_callout(device_t bus, struct callout *c, int flags) 248{ 249 struct ppb_data *ppb = DEVTOSOFTC(bus); 250 251 callout_init_mtx(c, ppb->ppc_lock, flags); 252} 253 254int 255ppb_sleep(device_t bus, void *wchan, int priority, const char *wmesg, int timo) 256{ 257 struct ppb_data *ppb = DEVTOSOFTC(bus); 258 259 return (mtx_sleep(wchan, ppb->ppc_lock, priority, wmesg, timo)); 260} 261