1 /*====================================================================== 2 3 A driver for PCMCIA parallel port adapters 4 5 (specifically, for the Quatech SPP-100 EPP card: other cards will 6 probably require driver tweaks) 7 8 parport_cs.c 1.29 2002/10/11 06:57:41 9 10 The contents of this file are subject to the Mozilla Public 11 License Version 1.1 (the "License"); you may not use this file 12 except in compliance with the License. You may obtain a copy of 13 the License at http://www.mozilla.org/MPL/ 14 15 Software distributed under the License is distributed on an "AS 16 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 17 implied. See the License for the specific language governing 18 rights and limitations under the License. 19 20 The initial developer of the original code is David A. Hinds 21 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 22 are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 23 24 Alternatively, the contents of this file may be used under the 25 terms of the GNU General Public License version 2 (the "GPL"), in 26 which case the provisions of the GPL are applicable instead of the 27 above. If you wish to allow the use of your version of this file 28 only under the terms of the GPL and not to allow others to use 29 your version of this file under the MPL, indicate your decision 30 by deleting the provisions above and replace them with the notice 31 and other provisions required by the GPL. If you do not delete 32 the provisions above, a recipient may use your version of this 33 file under either the MPL or the GPL. 34 35 ======================================================================*/ 36 37 #include <linux/kernel.h> 38 #include <linux/module.h> 39 #include <linux/init.h> 40 #include <linux/ptrace.h> 41 #include <linux/slab.h> 42 #include <linux/string.h> 43 #include <linux/timer.h> 44 #include <linux/ioport.h> 45 #include <linux/major.h> 46 #include <linux/interrupt.h> 47 48 #include <linux/parport.h> 49 #include <linux/parport_pc.h> 50 51 #include <pcmcia/cs.h> 52 #include <pcmcia/cistpl.h> 53 #include <pcmcia/ds.h> 54 #include <pcmcia/cisreg.h> 55 #include <pcmcia/ciscode.h> 56 57 /*====================================================================*/ 58 59 /* Module parameters */ 60 61 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 62 MODULE_DESCRIPTION("PCMCIA parallel port card driver"); 63 MODULE_LICENSE("Dual MPL/GPL"); 64 65 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) 66 67 INT_MODULE_PARM(epp_mode, 1); 68 69 70 /*====================================================================*/ 71 72 #define FORCE_EPP_MODE 0x08 73 74 typedef struct parport_info_t { 75 struct pcmcia_device *p_dev; 76 int ndev; 77 struct parport *port; 78 } parport_info_t; 79 80 static void parport_detach(struct pcmcia_device *p_dev); 81 static int parport_config(struct pcmcia_device *link); 82 static void parport_cs_release(struct pcmcia_device *); 83 84 /*====================================================================== 85 86 parport_attach() creates an "instance" of the driver, allocating 87 local data structures for one device. The device is registered 88 with Card Services. 89 90 ======================================================================*/ 91 92 static int parport_probe(struct pcmcia_device *link) 93 { 94 parport_info_t *info; 95 96 dev_dbg(&link->dev, "parport_attach()\n"); 97 98 /* Create new parport device */ 99 info = kzalloc(sizeof(*info), GFP_KERNEL); 100 if (!info) return -ENOMEM; 101 link->priv = info; 102 info->p_dev = link; 103 104 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 105 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8; 106 link->conf.Attributes = CONF_ENABLE_IRQ; 107 link->conf.IntType = INT_MEMORY_AND_IO; 108 109 return parport_config(link); 110 } /* parport_attach */ 111 112 /*====================================================================== 113 114 This deletes a driver "instance". The device is de-registered 115 with Card Services. If it has been released, all local data 116 structures are freed. Otherwise, the structures will be freed 117 when the device is released. 118 119 ======================================================================*/ 120 121 static void parport_detach(struct pcmcia_device *link) 122 { 123 dev_dbg(&link->dev, "parport_detach\n"); 124 125 parport_cs_release(link); 126 127 kfree(link->priv); 128 } /* parport_detach */ 129 130 /*====================================================================== 131 132 parport_config() is scheduled to run after a CARD_INSERTION event 133 is received, to configure the PCMCIA socket, and to make the 134 parport device available to the system. 135 136 ======================================================================*/ 137 138 static int parport_config_check(struct pcmcia_device *p_dev, 139 cistpl_cftable_entry_t *cfg, 140 cistpl_cftable_entry_t *dflt, 141 unsigned int vcc, 142 void *priv_data) 143 { 144 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { 145 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; 146 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK; 147 if (epp_mode) 148 p_dev->conf.ConfigIndex |= FORCE_EPP_MODE; 149 p_dev->resource[0]->start = io->win[0].base; 150 p_dev->resource[0]->end = io->win[0].len; 151 if (io->nwin == 2) { 152 p_dev->resource[1]->start = io->win[1].base; 153 p_dev->resource[1]->end = io->win[1].len; 154 } 155 if (pcmcia_request_io(p_dev) != 0) 156 return -ENODEV; 157 return 0; 158 } 159 return -ENODEV; 160 } 161 162 static int parport_config(struct pcmcia_device *link) 163 { 164 parport_info_t *info = link->priv; 165 struct parport *p; 166 int ret; 167 168 dev_dbg(&link->dev, "parport_config\n"); 169 170 ret = pcmcia_loop_config(link, parport_config_check, NULL); 171 if (ret) 172 goto failed; 173 174 if (!link->irq) 175 goto failed; 176 ret = pcmcia_request_configuration(link, &link->conf); 177 if (ret) 178 goto failed; 179 180 p = parport_pc_probe_port(link->resource[0]->start, 181 link->resource[1]->start, 182 link->irq, PARPORT_DMA_NONE, 183 &link->dev, IRQF_SHARED); 184 if (p == NULL) { 185 printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at " 186 "0x%3x, irq %u failed\n", 187 (unsigned int) link->resource[0]->start, 188 link->irq); 189 goto failed; 190 } 191 192 p->modes |= PARPORT_MODE_PCSPP; 193 if (epp_mode) 194 p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP; 195 info->ndev = 1; 196 info->port = p; 197 198 return 0; 199 200 failed: 201 parport_cs_release(link); 202 return -ENODEV; 203 } /* parport_config */ 204 205 /*====================================================================== 206 207 After a card is removed, parport_cs_release() will unregister the 208 device, and release the PCMCIA configuration. If the device is 209 still open, this will be postponed until it is closed. 210 211 ======================================================================*/ 212 213 static void parport_cs_release(struct pcmcia_device *link) 214 { 215 parport_info_t *info = link->priv; 216 217 dev_dbg(&link->dev, "parport_release\n"); 218 219 if (info->ndev) { 220 struct parport *p = info->port; 221 parport_pc_unregister_port(p); 222 } 223 info->ndev = 0; 224 225 pcmcia_disable_device(link); 226 } /* parport_cs_release */ 227 228 229 static struct pcmcia_device_id parport_ids[] = { 230 PCMCIA_DEVICE_FUNC_ID(3), 231 PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc), 232 PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003), 233 PCMCIA_DEVICE_NULL 234 }; 235 MODULE_DEVICE_TABLE(pcmcia, parport_ids); 236 237 static struct pcmcia_driver parport_cs_driver = { 238 .owner = THIS_MODULE, 239 .drv = { 240 .name = "parport_cs", 241 }, 242 .probe = parport_probe, 243 .remove = parport_detach, 244 .id_table = parport_ids, 245 }; 246 247 static int __init init_parport_cs(void) 248 { 249 return pcmcia_register_driver(&parport_cs_driver); 250 } 251 252 static void __exit exit_parport_cs(void) 253 { 254 pcmcia_unregister_driver(&parport_cs_driver); 255 } 256 257 module_init(init_parport_cs); 258 module_exit(exit_parport_cs); 259