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 #ifdef CONFIG_PARPORT_PC
  24 static int io_hi[PARPORT_MAX+1] __initdata = { [0 ... PARPORT_MAX] = 0 };
  25 #endif
  26 static int irq[PARPORT_MAX] __initdata = { [0 ... PARPORT_MAX-1] = PARPORT_IRQ_PROBEONLY };
  27 static int dma[PARPORT_MAX] __initdata = { [0 ... PARPORT_MAX-1] = PARPORT_DMA_NONE };
  28
  29 extern int parport_pc_init(int *io, int *io_hi, int *irq, int *dma);
  30 extern int parport_sunbpp_init(void);
  31 extern int parport_amiga_init(void);
  32 extern int parport_mfc3_init(void);
  33
  34 static int parport_setup_ptr __initdata = 0;
  35
  36 /*
  37  * Acceptable parameters:
  38  *
  39  * parport=0
  40  * parport=auto
  41  * parport=0xBASE[,IRQ[,DMA]]
  42  *
  43  * IRQ/DMA may be numeric or 'auto' or 'none'
  44  */
  45 static int __init parport_setup (char *str)
  46 {
  47         char *endptr;
  48         char *sep;
  49         int val;
  50
  51         if (!str || !*str || (*str == '0' && !*(str+1))) {
  52                 /* Disable parport if "parport=0" in cmdline */
  53                 io[0] = PARPORT_DISABLE;
  54                 return 1;
  55         }
  56
  57         if (!strncmp (str, "auto", 4)) {
  58                 irq[0] = PARPORT_IRQ_AUTO;
  59                 dma[0] = PARPORT_DMA_AUTO;
  60                 return 1;
  61         }
  62
  63         val = simple_strtoul (str, &endptr, 0);
  64         if (endptr == str) {
  65                 printk (KERN_WARNING "parport=%s not understood\n", str);
  66                 return 1;
  67         }
  68
  69         if (parport_setup_ptr == PARPORT_MAX) {
  70                 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
  71                 return 1;
  72         }
  73
  74         io[parport_setup_ptr] = val;
  75         irq[parport_setup_ptr] = PARPORT_IRQ_NONE;
  76         dma[parport_setup_ptr] = PARPORT_DMA_NONE;
  77
  78         sep = strchr (str, ',');
  79         if (sep++) {
  80                 if (!strncmp (sep, "auto", 4))
  81                         irq[parport_setup_ptr] = PARPORT_IRQ_AUTO;
  82                 else if (strncmp (sep, "none", 4)) {
  83                         val = simple_strtoul (sep, &endptr, 0);
  84                         if (endptr == sep) {
  85                                 printk (KERN_WARNING
  86                                         "parport=%s: irq not understood\n",
  87                                         str);
  88                                 return 1;
  89                         }
  90                         irq[parport_setup_ptr] = val;
  91                 }
  92         }
  93
  94         sep = strchr (sep, ',');
  95         if (sep++) {
  96                 if (!strncmp (sep, "auto", 4))
  97                         dma[parport_setup_ptr] = PARPORT_DMA_AUTO;
  98                 else if (!strncmp (sep, "nofifo", 6))
  99                         dma[parport_setup_ptr] = PARPORT_DMA_NOFIFO;
 100                 else if (strncmp (sep, "none", 4)) {
 101                         val = simple_strtoul (sep, &endptr, 0);
 102                         if (endptr == sep) {
 103                                 printk (KERN_WARNING
 104                                         "parport=%s: dma not understood\n",
 105                                         str);
 106                                 return 1;
 107                         }
 108                         dma[parport_setup_ptr] = val;
 109                 }
 110         }
 111
 112         parport_setup_ptr++;
 113         return 1;
 114 }
 115
 116 __setup ("parport=", parport_setup);
 117
 118 #endif
 119
 120 #ifdef MODULE
 121 int init_module(void)
 122 {
 123 #ifdef CONFIG_SYSCTL
 124         parport_default_proc_register ();
 125 #endif
 126         return 0;
 127 }
 128
 129 void cleanup_module(void)
 130 {
 131 #ifdef CONFIG_SYSCTL
 132         parport_default_proc_unregister ();
 133 #endif
 134 }
 135
 136 #else
 137
 138 int __init parport_init (void)
 139 {
 140         if (io[0] == PARPORT_DISABLE)
 141                 return 1;
 142
 143 #ifdef CONFIG_SYSCTL
 144         parport_default_proc_register ();
 145 #endif
 146
 147 #ifdef CONFIG_PARPORT_PC
 148         parport_pc_init(io, io_hi, irq, dma);
 149 #endif
 150 #ifdef CONFIG_PARPORT_AMIGA
 151         parport_amiga_init();
 152 #endif
 153 #ifdef CONFIG_PARPORT_MFC3
 154         parport_mfc3_init();
 155 #endif
 156 #ifdef CONFIG_PARPORT_ATARI
 157         parport_atari_init();
 158 #endif
 159 #ifdef CONFIG_PARPORT_ARC
 160         parport_arc_init();
 161 #endif
 162 #ifdef CONFIG_PARPORT_SUNBPP
 163         parport_sunbpp_init();
 164 #endif
 165         return 0;
 166 }
 167
 168 #endif
 169
 170 /* Exported symbols for modules. */
 171
 172 EXPORT_SYMBOL(parport_claim);
 173 EXPORT_SYMBOL(parport_claim_or_block);
 174 EXPORT_SYMBOL(parport_release);
 175 EXPORT_SYMBOL(parport_register_port);
 176 EXPORT_SYMBOL(parport_announce_port);
 177 EXPORT_SYMBOL(parport_unregister_port);
 178 EXPORT_SYMBOL(parport_register_driver);
 179 EXPORT_SYMBOL(parport_unregister_driver);
 180 EXPORT_SYMBOL(parport_register_device);
 181 EXPORT_SYMBOL(parport_unregister_device);
 182 EXPORT_SYMBOL(parport_enumerate);
 183 EXPORT_SYMBOL(parport_get_port);
 184 EXPORT_SYMBOL(parport_put_port);
 185 EXPORT_SYMBOL(parport_find_number);
 186 EXPORT_SYMBOL(parport_find_base);
 187 EXPORT_SYMBOL(parport_negotiate);
 188 EXPORT_SYMBOL(parport_write);
 189 EXPORT_SYMBOL(parport_read);
 190 EXPORT_SYMBOL(parport_ieee1284_wakeup);
 191 EXPORT_SYMBOL(parport_wait_peripheral);
 192 EXPORT_SYMBOL(parport_poll_peripheral);
 193 EXPORT_SYMBOL(parport_wait_event);
 194 EXPORT_SYMBOL(parport_set_timeout);
 195 EXPORT_SYMBOL(parport_ieee1284_interrupt);
 196 EXPORT_SYMBOL(parport_ieee1284_ecp_write_data);
 197 EXPORT_SYMBOL(parport_ieee1284_ecp_read_data);
 198 EXPORT_SYMBOL(parport_ieee1284_ecp_write_addr);
 199 EXPORT_SYMBOL(parport_ieee1284_write_compat);
 200 EXPORT_SYMBOL(parport_ieee1284_read_nibble);
 201 EXPORT_SYMBOL(parport_ieee1284_read_byte);
 202 EXPORT_SYMBOL(parport_ieee1284_epp_write_data);
 203 EXPORT_SYMBOL(parport_ieee1284_epp_read_data);
 204 EXPORT_SYMBOL(parport_ieee1284_epp_write_addr);
 205 EXPORT_SYMBOL(parport_ieee1284_epp_read_addr);
 206 EXPORT_SYMBOL(parport_proc_register);
 207 EXPORT_SYMBOL(parport_proc_unregister);
 208 EXPORT_SYMBOL(parport_device_proc_register);
 209 EXPORT_SYMBOL(parport_device_proc_unregister);
 210 EXPORT_SYMBOL(parport_default_proc_register);
 211 EXPORT_SYMBOL(parport_default_proc_unregister);
 212 EXPORT_SYMBOL(parport_parse_irqs);
 213 EXPORT_SYMBOL(parport_parse_dmas);
 214 #ifdef CONFIG_PARPORT_1284
 215 EXPORT_SYMBOL(parport_open);
 216 EXPORT_SYMBOL(parport_close);
 217 EXPORT_SYMBOL(parport_device_id);
 218 EXPORT_SYMBOL(parport_device_num);
 219 EXPORT_SYMBOL(parport_device_coords);
 220 EXPORT_SYMBOL(parport_daisy_deselect_all);
 221 EXPORT_SYMBOL(parport_daisy_select);
 222 EXPORT_SYMBOL(parport_daisy_init);
 223 EXPORT_SYMBOL(parport_find_device);
 224 EXPORT_SYMBOL(parport_find_class);
 225 #endif
 226
 227 void inc_parport_count(void)
 228 {
 229 #ifdef MODULE
 230         MOD_INC_USE_COUNT;
 231 #endif
 232 }
 233
 234 void dec_parport_count(void)
 235 {
 236 #ifdef MODULE
 237         MOD_DEC_USE_COUNT;
 238 #endif
 239 }