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_types.h> 52 #include <pcmcia/cs.h> 53 #include <pcmcia/cistpl.h> 54 #include <pcmcia/ds.h> 55 #include <pcmcia/cisreg.h> 56 #include <pcmcia/ciscode.h> 57 58 /*====================================================================*/ 59 60 /* Module parameters */ 61 62 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 63 MODULE_DESCRIPTION("PCMCIA parallel port card driver"); 64 MODULE_LICENSE("Dual MPL/GPL"); 65 66 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) 67 68 INT_MODULE_PARM(epp_mode, 1); 69 70 71 /*====================================================================*/ 72 73 #define FORCE_EPP_MODE 0x08 74 75 typedef struct parport_info_t { 76 struct pcmcia_device *p_dev; 77 int ndev; 78 struct parport *port; 79 } parport_info_t; 80 81 static void parport_detach(struct pcmcia_device *p_dev); 82 static int parport_config(struct pcmcia_device *link); 83 static void parport_cs_release(struct pcmcia_device *); 84 85 /*====================================================================== 86 87 parport_attach() creates an "instance" of the driver, allocating 88 local data structures for one device. The device is registered 89 with Card Services. 90 91 ======================================================================*/ 92 93 static int parport_probe(struct pcmcia_device *link) 94 { 95 parport_info_t *info; 96 97 dev_dbg(&link->dev, "parport_attach()\n"); 98 99 /* Create new parport device */ 100 info = kzalloc(sizeof(*info), GFP_KERNEL); 101 if (!info) return -ENOMEM; 102 link->priv = info; 103 info->p_dev = link; 104 105 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; 106 link->io.Attributes2 = IO_DATA_PATH_WIDTH_8; 107 link->conf.Attributes = CONF_ENABLE_IRQ; 108 link->conf.IntType = INT_MEMORY_AND_IO; 109 110 return parport_config(link); 111 } /* parport_attach */ 112 113 /*====================================================================== 114 115 This deletes a driver "instance". The device is de-registered 116 with Card Services. If it has been released, all local data 117 structures are freed. Otherwise, the structures will be freed 118 when the device is released. 119 120 ======================================================================*/ 121 122 static void parport_detach(struct pcmcia_device *link) 123 { 124 dev_dbg(&link->dev, "parport_detach\n"); 125 126 parport_cs_release(link); 127 128 kfree(link->priv); 129 } /* parport_detach */ 130 131 /*====================================================================== 132 133 parport_config() is scheduled to run after a CARD_INSERTION event 134 is received, to configure the PCMCIA socket, and to make the 135 parport device available to the system. 136 137 ======================================================================*/ 138 139 static int parport_config_check(struct pcmcia_device *p_dev, 140 cistpl_cftable_entry_t *cfg, 141 cistpl_cftable_entry_t *dflt, 142 unsigned int vcc, 143 void *priv_data) 144 { 145 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { 146 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; 147 if (epp_mode) 148 p_dev->conf.ConfigIndex |= FORCE_EPP_MODE; 149 p_dev->io.BasePort1 = io->win[0].base; 150 p_dev->io.NumPorts1 = io->win[0].len; 151 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; 152 if (io->nwin == 2) { 153 p_dev->io.BasePort2 = io->win[1].base; 154 p_dev->io.NumPorts2 = io->win[1].len; 155 } 156 if (pcmcia_request_io(p_dev, &p_dev->io) != 0) 157 return -ENODEV; 158 return 0; 159 } 160 return -ENODEV; 161 } 162 163 static int parport_config(struct pcmcia_device *link) 164 { 165 parport_info_t *info = link->priv; 166 struct parport *p; 167 int ret; 168 169 dev_dbg(&link->dev, "parport_config\n"); 170 171 ret = pcmcia_loop_config(link, parport_config_check, NULL); 172 if (ret) 173 goto failed; 174 175 if (!link->irq) 176 goto failed; 177 ret = pcmcia_request_configuration(link, &link->conf); 178 if (ret) 179 goto failed; 180 181 p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2, 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", link->io.BasePort1, 187 link->irq); 188 goto failed; 189 } 190 191 p->modes |= PARPORT_MODE_PCSPP; 192 if (epp_mode) 193 p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP; 194 info->ndev = 1; 195 info->port = p; 196 197 return 0; 198 199 failed: 200 parport_cs_release(link); 201 return -ENODEV; 202 } /* parport_config */ 203 204 /*====================================================================== 205 206 After a card is removed, parport_cs_release() will unregister the 207 device, and release the PCMCIA configuration. If the device is 208 still open, this will be postponed until it is closed. 209 210 ======================================================================*/ 211 212 static void parport_cs_release(struct pcmcia_device *link) 213 { 214 parport_info_t *info = link->priv; 215 216 dev_dbg(&link->dev, "parport_release\n"); 217 218 if (info->ndev) { 219 struct parport *p = info->port; 220 parport_pc_unregister_port(p); 221 } 222 info->ndev = 0; 223 224 pcmcia_disable_device(link); 225 } /* parport_cs_release */ 226 227 228 static struct pcmcia_device_id parport_ids[] = { 229 PCMCIA_DEVICE_FUNC_ID(3), 230 PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc), 231 PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003), 232 PCMCIA_DEVICE_NULL 233 }; 234 MODULE_DEVICE_TABLE(pcmcia, parport_ids); 235 236 static struct pcmcia_driver parport_cs_driver = { 237 .owner = THIS_MODULE, 238 .drv = { 239 .name = "parport_cs", 240 }, 241 .probe = parport_probe, 242 .remove = parport_detach, 243 .id_table = parport_ids, 244 }; 245 246 static int __init init_parport_cs(void) 247 { 248 return pcmcia_register_driver(&parport_cs_driver); 249 } 250 251 static void __exit exit_parport_cs(void) 252 { 253 pcmcia_unregister_driver(&parport_cs_driver); 254 } 255 256 module_init(init_parport_cs); 257 module_exit(exit_parport_cs); 258