obsolete-buildroot/sources/openwrt/kernel/diag.c

   1 // replacement diag module
   2 // (c) 2004 openwrt
   3 // mbm at alt dot org
   4 //
   5 // initial release 2004/03/28
   6 //
   7 // 2004/08/26 asus & buffalo support added
   8
   9 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/sysctl.h>
  13 #include <asm/io.h>
  14 #include <typedefs.h>
  15 #include <bcm4710.h>
  16 #include <sbutils.h>
  17
  18 extern char * nvram_get(const char *name);
  19 static void *sbh;
  20
  21 // v2.x - - - - -
  22 #define DIAG_GPIO (1<<1)
  23 #define DMZ_GPIO  (1<<7)
  24
  25 static void set_gpio(uint32 mask, uint32 value) {
  26         sb_gpiocontrol(sbh,mask,0);
  27         sb_gpioouten(sbh,mask,mask);
  28         sb_gpioout(sbh,mask,value);
  29 }
  30
  31 static void v2_set_diag(u8 state) {
  32         set_gpio(DIAG_GPIO,state);
  33 }
  34 static void v2_set_dmz(u8 state) {
  35         set_gpio(DMZ_GPIO,state);
  36 }
  37
  38 // v1.x - - - - -
  39 #define LED_DIAG   0x13
  40 #define LED_DMZ    0x12
  41
  42 static void v1_set_diag(u8 state) {
  43         if (!state) {
  44                 *(volatile u8*)(KSEG1ADDR(BCM4710_EUART)+LED_DIAG)=0xFF;
  45         } else {
  46                 *(volatile u8*)(KSEG1ADDR(BCM4710_EUART)+LED_DIAG);
  47         }
  48 }
  49 static void v1_set_dmz(u8 state) {
  50         if (!state) {
  51                 *(volatile u8*)(KSEG1ADDR(BCM4710_EUART)+LED_DMZ)=0xFF;
  52         } else {
  53                 *(volatile u8*)(KSEG1ADDR(BCM4710_EUART)+LED_DMZ);
  54         }
  55 }
  56
  57 // - - - - -
  58 static void ignore(u8 ignored) {};
  59
  60 // - - - - -
  61 #define BIT_DMZ         0x01
  62 #define BIT_DIAG        0x04
  63
  64 void (*set_diag)(u8 state);
  65 void (*set_dmz)(u8 state);
  66
  67 static unsigned int diag = 0;
  68
  69 static void diag_change()
  70 {
  71         printk(KERN_INFO "led -> %02x\n",diag);
  72
  73         set_diag(0xFF); // off
  74         set_dmz(0xFF); // off
  75
  76         if(diag & BIT_DIAG)
  77                 set_diag(0x00); // on
  78         if(diag & BIT_DMZ)
  79                 set_dmz(0x00); // on
  80 }
  81
  82 static int proc_diag(ctl_table *table, int write, struct file *filp,
  83                 void *buffer, size_t *lenp)
  84 {
  85         int r;
  86         r = proc_dointvec(table, write, filp, buffer, lenp);
  87         if (write && !r) {
  88                 diag_change();
  89         }
  90         return r;
  91 }
  92
  93 // - - - - -
  94 static unsigned char reset_gpio = 0;
  95 static unsigned char reset_polarity = 0;
  96 static unsigned int reset = 0;
  97
  98 static int proc_reset(ctl_table *table, int write, struct file *filp,
  99                 void *buffer, size_t *lenp)
 100 {
 101
 102         if (reset_gpio) {
 103                 sb_gpiocontrol(sbh,reset_gpio,reset_gpio);
 104                 sb_gpioouten(sbh,reset_gpio,0);
 105                 reset=!(sb_gpioin(sbh)&reset_gpio);
 106
 107                 if (reset_polarity) reset=!reset;
 108         } else {
 109                 reset=0;
 110         }
 111
 112         return proc_dointvec(table, write, filp, buffer, lenp);
 113 }
 114
 115 // - - - - -
 116 static struct ctl_table_header *diag_sysctl_header;
 117
 118 static ctl_table sys_diag[] = {
 119          {
 120            ctl_name: 2000,
 121            procname: "diag",
 122            data: &diag,
 123            maxlen: sizeof(diag),
 124            mode: 0644,
 125            proc_handler: proc_diag
 126          },
 127          {
 128            ctl_name: 2001,
 129            procname: "reset",
 130            data: &reset,
 131            maxlen: sizeof(reset),
 132            mode: 0444,
 133            proc_handler: proc_reset
 134          },
 135          { 0 }
 136 };
 137
 138 static int __init diag_init()
 139 {
 140         char *buf;
 141         u32 board_type;
 142         sbh = sb_kattach();
 143         sb_gpiosetcore(sbh);
 144
 145         board_type = sb_boardtype(sbh);
 146         printk(KERN_INFO "diag boardtype: %08x\n",board_type);
 147
 148         set_diag=ignore;
 149         set_dmz=ignore;
 150
 151         if (board_type & 0x400) {
 152                 board_type=1;
 153                 buf=nvram_get("boardtype")?:"";
 154                 if (!strcmp(buf,"bcm94710dev")) {
 155                         buf=nvram_get("boardnum")?:"";
 156                         if (!strcmp(buf,"42")) {
 157                                 // wrt54g v1.x
 158                                 set_diag=v1_set_diag;
 159                                 set_dmz=v1_set_dmz;
 160                                 reset_gpio=(1<<6);
 161                                 reset_polarity=0;
 162                         } else if (!strcmp(buf,"asusX")) {
 163                                 //asus wl-500g
 164                                 //no leds
 165                                 reset_gpio=(1<<6);
 166                                 reset_polarity=1;
 167                         }
 168                 } else if (!strcmp(buf,"bcm94710ap")) {
 169                         // buffalo
 170                         set_diag=ignore;
 171                         set_dmz=v2_set_dmz;
 172                         reset_gpio=(1<<4);
 173                         reset_polarity=1;
 174                 }
 175         } else {
 176                 board_type=2;
 177                 set_diag=v2_set_diag;
 178                 set_dmz=v2_set_dmz;
 179                 reset_gpio=(1<<6);
 180                 reset_polarity=0;
 181         }
 182         printk(KERN_INFO "using v%d hardware\n",board_type);
 183
 184         diag_sysctl_header = register_sysctl_table(sys_diag, 0);
 185         diag_change();
 186
 187         return 0;
 188 }
 189
 190 static void __exit diag_exit()
 191 {
 192         unregister_sysctl_table(diag_sysctl_header);
 193 }
 194
 195 module_init(diag_init);
 196 module_exit(diag_exit);