]> Joshua Wise's Git repositories - netwatch.git/blob - net/net.c
Hacky network transmitter.
[netwatch.git] / net / net.c
1 #include <pci.h>
2 #include <io.h>
3 #include <video_defines.h>
4 #include <smram.h>
5 #include <pci-bother.h>
6 #include <output.h>
7 #include "net.h"
8
9 static struct nic *_nic = 0x0;
10
11 extern struct pci_driver a3c90x_driver;
12
13 static char test[1024] = {0};
14
15 static unsigned char vga_read(unsigned char idx)
16 {
17         outb(CRTC_IDX_REG, idx);
18         return inb(CRTC_DATA_REG);
19 }
20
21 static unsigned int vga_base()
22 {
23         return (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 9)
24              + (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 1);
25 }
26
27 void eth_poll()
28 {
29         int i;
30 //      static int c;
31         static short pos = 0x0;
32         unsigned short base = vga_base();
33         unsigned char *p = (unsigned char *)0xB8000;
34         smram_state_t old_state;
35         
36         if (!_nic)
37                 return;
38
39         _nic->poll(_nic, 0);
40         smram_tseg_set_state(SMRAM_TSEG_OPEN);
41         old_state = smram_save_state();
42         
43 //      if ((c++) % 2)
44 //              return;
45         
46         test[0] = pos >> 8;
47         test[1] = pos & 0xFF;
48         test[2] = base >> 8;
49         test[3] = base & 0xFF;
50
51         smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
52         
53         for (i = 4; i < 1024; i++)
54         {
55                 test[i] = p[pos++];
56                 pos %= 0x8000;
57         }
58         smram_restore_state(old_state);
59         _nic->transmit("\x00\x03\x93\x87\x84\x8C", 0x1337, 1024, test);
60 }
61
62 int eth_register(struct nic *nic)
63 {
64         if (_nic)
65                 return -1;
66         _nic = nic;
67         return 0;
68 }
69
70 void eth_init()
71 {
72         /* Required for DMA to work. :( */
73         smram_tseg_set_state(SMRAM_TSEG_OPEN);
74         pci_probe_driver(a3c90x_driver);
75 }
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