drivers/parport/init.c

   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 extern int parport_pc_init(int *io, int *io_hi, int *irq, int *dma);
  28 extern int parport_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                 return 0;
  51         }
  52
  53         if (!strncmp (str, "auto", 4)) {
  54                 irq[0] = PARPORT_IRQ_AUTO;
  55                 dma[0] = PARPORT_DMA_AUTO;
  56                 return 0;
  57         }
  58
  59         val = simple_strtoul (str, &endptr, 0);
  60         if (endptr == str) {
  61                 printk (KERN_WARNING "parport=%s not understood\n", str);
  62                 return 1;
  63         }
  64
  65         if (parport_setup_ptr == PARPORT_MAX) {
  66                 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
  67                 return 1;
  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                                 return 1;
  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                                 return 1;
 101                         }
 102                         dma[parport_setup_ptr] = val;
 103                 }
 104         }
 105
 106         parport_setup_ptr++;
 107         return 0;
 108 }
 109
 110 __setup ("parport=", parport_setup);
 111
 112 #endif
 113
 114 #ifdef MODULE
 115 int init_module(void)
 116 {
 117 #ifdef CONFIG_SYSCTL
 118         parport_default_proc_register ();
 119 #endif
 120         return 0;
 121 }
 122
 123 void cleanup_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                 return 1;
 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         return 0;
 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 void inc_parport_count(void)
 215 {
 216 #ifdef MODULE
 217         MOD_INC_USE_COUNT;
 218 #endif
 219 }
 220
 221 void dec_parport_count(void)
 222 {
 223 #ifdef MODULE
 224         MOD_DEC_USE_COUNT;
 225 #endif
 226 }