1 /*- 2 * Copyright (c) 1997, 1998 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 * $Id: ppb_base.c,v 1.4 1998/08/03 19:14:31 msmith Exp $ 27 * 28 */ 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 33 #include <dev/ppbus/ppbconf.h> 34 35 /* 36 * ppb_intr() 37 * 38 * Function called by ppcintr() when an intr occurs. 39 */ 40 void 41 ppb_intr(struct ppb_link *pl) 42 { 43 struct ppb_data *ppb = pl->ppbus; 44 45 /* 46 * Call chipset dependent code. 47 * Should be filled at chipset initialisation if needed. 48 */ 49 if (pl->adapter->intr_handler) 50 (*pl->adapter->intr_handler)(pl->adapter_unit); 51 52 /* 53 * Call upper handler iff the bus is owned by a device and 54 * this device has specified an interrupt handler. 55 */ 56 if (ppb->ppb_owner && ppb->ppb_owner->intr) 57 (*ppb->ppb_owner->intr)(ppb->ppb_owner->id_unit); 58 59 return; 60 } 61 62 /* 63 * ppb_poll_device() 64 * 65 * Polls the device 66 * 67 * max is a delay in 10-milliseconds 68 */ 69 int 70 ppb_poll_device(struct ppb_device *dev, int max, 71 char mask, char status, int how) 72 { 73 int i, error; 74 75 for (i = 0; i < max; i++) { 76 if ((ppb_rstr(dev) & mask) == status) 77 return (0); 78 79 switch (how) { 80 case PPB_NOINTR: 81 /* wait 10 ms */ 82 if ((error = tsleep((caddr_t)dev, PPBPRI, 83 "ppbpoll", hz/100))) 84 return (error); 85 break; 86 87 case PPB_INTR: 88 default: 89 /* wait 10 ms */ 90 if ((error = tsleep((caddr_t)dev, PPBPRI | PCATCH, 91 "ppbpoll", hz/100))) 92 return (error); 93 break; 94 } 95 } 96 97 return (EWOULDBLOCK); 98 } 99 100 /* 101 * ppb_set_mode() 102 * 103 * Set the operating mode of the chipset 104 */ 105 int 106 ppb_set_mode(struct ppb_device *dev, int mode) 107 { 108 struct ppb_data *ppb = dev->ppb; 109 int old_mode = ppb_get_mode(dev); 110 111 if ((*ppb->ppb_link->adapter->setmode)(dev->id_unit, mode)) 112 return (-1); 113 114 /* XXX yet device mode = ppbus mode = chipset mode */ 115 dev->mode = ppb->mode = mode; 116 117 return (old_mode); 118 } 119 120 /* 121 * ppb_reset_epp_timeout() 122 * 123 * Reset the EPP timeout bit in the status register 124 */ 125 int 126 ppb_reset_epp_timeout(struct ppb_device *dev) 127 { 128 struct ppb_data *ppb = dev->ppb; 129 130 if (ppb->ppb_owner != dev) 131 return (EACCES); 132 133 (*ppb->ppb_link->adapter->reset_epp_timeout)(dev->id_unit); 134 135 return (0); 136 } 137 138 /* 139 * ppb_ecp_sync() 140 * 141 * Wait for the ECP FIFO to be empty 142 */ 143 int 144 ppb_ecp_sync(struct ppb_device *dev) 145 { 146 struct ppb_data *ppb = dev->ppb; 147 148 if (ppb->ppb_owner != dev) 149 return (EACCES); 150 151 (*ppb->ppb_link->adapter->ecp_sync)(dev->id_unit); 152 153 return (0); 154 } 155 156 /* 157 * ppb_get_status() 158 * 159 * Read the status register and update the status info 160 */ 161 int 162 ppb_get_status(struct ppb_device *dev, struct ppb_status *status) 163 { 164 struct ppb_data *ppb = dev->ppb; 165 register char r; 166 167 if (ppb->ppb_owner != dev) 168 return (EACCES); 169 170 r = status->status = ppb_rstr(dev); 171 172 status->timeout = r & TIMEOUT; 173 status->error = !(r & nFAULT); 174 status->select = r & SELECT; 175 status->paper_end = r & PERROR; 176 status->ack = !(r & nACK); 177 status->busy = !(r & nBUSY); 178 179 return (0); 180 } 181