drivers/parport/init.c

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 1 /* Parallel-port initialisation code.
 2  *
 3  * Authors: David Campbell <campbell@torque.net>
 4  * Tim Waugh <tim@cyberelk.demon.co.uk>
 5  * Jose Renau <renau@acm.org>
 6  *
 7  * based on work by Grant Guenther <grant@torque.net>
 8  * and Philip Blundell <Philip.Blundell@pobox.com>
 9  */
 10
 11 #include <linux/config.h>
 12 #include <linux/module.h>
 13 #include <linux/threads.h>
 14 #include <linux/string.h>
 15 #include <linux/parport.h>
 16 #include <linux/errno.h>
 17 #include <linux/kernel.h>
 18 #include <linux/malloc.h>
 19 #include <linux/init.h>
 20
 21 #ifndef MODULE
 22 static int io[PARPORT_MAX+1] __initdata = { [0... PARPORT_MAX] =0};
 23 static int io_hi[PARPORT_MAX+1] __initdata = { [0... PARPORT_MAX] =0};
 24 static int irq[PARPORT_MAX] __initdata = { [0... PARPORT_MAX-1] = PARPORT_IRQ_PROBEONLY };
 25 static int dma[PARPORT_MAX] __initdata = { [0... PARPORT_MAX-1] = PARPORT_DMA_NONE };
 26
 27 externintparport_pc_init(int*io,int*io_hi,int*irq,int*dma);
 28 externintparport_sunbpp_init(void);
 29
 30 static int parport_setup_ptr __initdata =0;
 31
 32 /*
 33  * Acceptable parameters:
 34  *
 35  * parport=0
 36  * parport=auto
 37  * parport=0xBASE[,IRQ[,DMA]]
 38  *
 39  * IRQ/DMA may be numeric or 'auto' or 'none'
 40  */
 41 static int __init parport_setup(char*str)
 42 {
 43 char*endptr;
 44 char*sep;
 45 int val;
 46
 47 if(!str || !*str || (*str =='0'&& !*(str+1))) {
 48 /* Disable parport if "parport=0" in cmdline */
 49  io[0] = PARPORT_DISABLE;
 50 return0;
 51 }
 52
 53 if(!strncmp(str,"auto",4)) {
 54  irq[0] = PARPORT_IRQ_AUTO;
 55  dma[0] = PARPORT_DMA_AUTO;
 56 return0;
 57 }
 58
 59  val =simple_strtoul(str, &endptr,0);
 60 if(endptr == str) {
 61 printk(KERN_WARNING "parport=%s not understood\n", str);
 62 return1;
 63 }
 64
 65 if(parport_setup_ptr == PARPORT_MAX) {
 66 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
 67 return1;
 68 }
 69
 70  io[parport_setup_ptr] = val;
 71  irq[parport_setup_ptr] = PARPORT_IRQ_NONE;
 72  dma[parport_setup_ptr] = PARPORT_DMA_NONE;
 73
 74  sep =strchr(str,',');
 75 if(sep++) {
 76 if(!strncmp(sep,"auto",4))
 77  irq[parport_setup_ptr] = PARPORT_IRQ_AUTO;
 78 else if(strncmp(sep,"none",4)) {
 79  val =simple_strtoul(sep, &endptr,0);
 80 if(endptr == sep) {
 81 printk(KERN_WARNING
 82 "parport=%s: irq not understood\n",
 83  str);
 84 return1;
 85 }
 86  irq[parport_setup_ptr] = val;
 87 }
 88 }
 89
 90  sep =strchr(sep,',');
 91 if(sep++) {
 92 if(!strncmp(sep,"auto",4))
 93  dma[parport_setup_ptr] = PARPORT_DMA_AUTO;
 94 else if(strncmp(sep,"none",4)) {
 95  val =simple_strtoul(sep, &endptr,0);
 96 if(endptr == sep) {
 97 printk(KERN_WARNING
 98 "parport=%s: dma not understood\n",
 99  str);
 100 return1;
 101 }
 102  dma[parport_setup_ptr] = val;
 103 }
 104 }
 105
 106  parport_setup_ptr++;
 107 return0;
 108 }
 109
 110 __setup("parport=", parport_setup);
 111
 112 #endif
 113
 114 #ifdef MODULE
 115 intinit_module(void)
 116 {
 117 #ifdef CONFIG_SYSCTL
 118 parport_default_proc_register();
 119 #endif
 120 return0;
 121 }
 122
 123 voidcleanup_module(void)
 124 {
 125 #ifdef CONFIG_SYSCTL
 126 parport_default_proc_unregister();
 127 #endif
 128 }
 129
 130 #else
 131
 132 int __init parport_init(void)
 133 {
 134 if(io[0] == PARPORT_DISABLE)
 135 return1;
 136
 137 #ifdef CONFIG_SYSCTL
 138 parport_default_proc_register();
 139 #endif
 140
 141 #ifdef CONFIG_PARPORT_PC
 142 parport_pc_init(io, io_hi, irq, dma);
 143 #endif
 144 #ifdef CONFIG_PARPORT_AMIGA
 145 parport_amiga_init();
 146 #endif
 147 #ifdef CONFIG_PARPORT_MFC3
 148 parport_mfc3_init();
 149 #endif
 150 #ifdef CONFIG_PARPORT_ATARI
 151 parport_atari_init();
 152 #endif
 153 #ifdef CONFIG_PARPORT_ARC
 154 parport_arc_init();
 155 #endif
 156 #ifdef CONFIG_PARPORT_SUNBPP
 157 parport_sunbpp_init();
 158 #endif
 159 return0;
 160 }
 161
 162 #endif
 163
 164 /* Exported symbols for modules. */
 165
 166 EXPORT_SYMBOL(parport_claim);
 167 EXPORT_SYMBOL(parport_claim_or_block);
 168 EXPORT_SYMBOL(parport_release);
 169 EXPORT_SYMBOL(parport_register_port);
 170 EXPORT_SYMBOL(parport_announce_port);
 171 EXPORT_SYMBOL(parport_unregister_port);
 172 EXPORT_SYMBOL(parport_register_driver);
 173 EXPORT_SYMBOL(parport_unregister_driver);
 174 EXPORT_SYMBOL(parport_register_device);
 175 EXPORT_SYMBOL(parport_unregister_device);
 176 EXPORT_SYMBOL(parport_enumerate);
 177 EXPORT_SYMBOL(parport_negotiate);
 178 EXPORT_SYMBOL(parport_write);
 179 EXPORT_SYMBOL(parport_read);
 180 EXPORT_SYMBOL(parport_ieee1284_wakeup);
 181 EXPORT_SYMBOL(parport_wait_peripheral);
 182 EXPORT_SYMBOL(parport_wait_event);
 183 EXPORT_SYMBOL(parport_set_timeout);
 184 EXPORT_SYMBOL(parport_ieee1284_interrupt);
 185 EXPORT_SYMBOL(parport_ieee1284_ecp_write_data);
 186 EXPORT_SYMBOL(parport_ieee1284_ecp_read_data);
 187 EXPORT_SYMBOL(parport_ieee1284_ecp_write_addr);
 188 EXPORT_SYMBOL(parport_ieee1284_write_compat);
 189 EXPORT_SYMBOL(parport_ieee1284_read_nibble);
 190 EXPORT_SYMBOL(parport_ieee1284_read_byte);
 191 EXPORT_SYMBOL(parport_ieee1284_epp_write_data);
 192 EXPORT_SYMBOL(parport_ieee1284_epp_read_data);
 193 EXPORT_SYMBOL(parport_ieee1284_epp_write_addr);
 194 EXPORT_SYMBOL(parport_ieee1284_epp_read_addr);
 195 EXPORT_SYMBOL(parport_proc_register);
 196 EXPORT_SYMBOL(parport_proc_unregister);
 197 EXPORT_SYMBOL(parport_device_proc_register);
 198 EXPORT_SYMBOL(parport_device_proc_unregister);
 199 EXPORT_SYMBOL(parport_default_proc_register);
 200 EXPORT_SYMBOL(parport_default_proc_unregister);
 201 EXPORT_SYMBOL(parport_parse_irqs);
 202 EXPORT_SYMBOL(parport_parse_dmas);
 203 #ifdef CONFIG_PARPORT_1284
 204 EXPORT_SYMBOL(parport_open);
 205 EXPORT_SYMBOL(parport_close);
 206 EXPORT_SYMBOL(parport_device_id);
 207 EXPORT_SYMBOL(parport_device_num);
 208 EXPORT_SYMBOL(parport_device_coords);
 209 EXPORT_SYMBOL(parport_daisy_deselect_all);
 210 EXPORT_SYMBOL(parport_daisy_select);
 211 EXPORT_SYMBOL(parport_daisy_init);
 212 #endif
 213
 214 voidinc_parport_count(void)
 215 {
 216 #ifdef MODULE
 217  MOD_INC_USE_COUNT;
 218 #endif
 219 }
 220
 221 voiddec_parport_count(void)
 222 {
 223 #ifdef MODULE
 224  MOD_DEC_USE_COUNT;
 225 #endif
 226 }