Hacky network transmitter.

[netwatch.git] / net / net.c

diff --git a/net/net.c b/net/net.c
index 04eaff5f5c75b521d3f43444511553eb00524f28..98571b0bfb14a13355fb282277ee19212110b814 100644 (file)
--- a/net/net.c
+++ b/net/net.c
@@ -1,4 +1,7 @@
 #include <pci.h>
+#include <io.h>
+#include <video_defines.h>
+#include <smram.h>
 #include <pci-bother.h>
 #include <output.h>
 #include "net.h"
@@ -9,33 +12,51 @@ extern struct pci_driver a3c90x_driver;
 
 static char test[1024] = {0};
 
+static unsigned char vga_read(unsigned char idx)
+{
+       outb(CRTC_IDX_REG, idx);
+       return inb(CRTC_DATA_REG);
+}
+
+static unsigned int vga_base()
+{
+       return (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 9)
+            + (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 1);
+}
+
 void eth_poll()
 {
        int i;
-       static int c;
+//     static int c;
+       static short pos = 0x0;
+       unsigned short base = vga_base();
+       unsigned char *p = (unsigned char *)0xB8000;
+       smram_state_t old_state;
        
        if (!_nic)
                return;
 
        _nic->poll(_nic, 0);
+       smram_tseg_set_state(SMRAM_TSEG_OPEN);
+       old_state = smram_save_state();
        
-       if ((c++) % 30)
-               return;
+//     if ((c++) % 2)
+//             return;
+       
+       test[0] = pos >> 8;
+       test[1] = pos & 0xFF;
+       test[2] = base >> 8;
+       test[3] = base & 0xFF;
+
+       smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
        
-       for (i = 0; i < 1024; i++)
+       for (i = 4; i < 1024; i++)
        {
-               switch(i%5)
-               {
-               case 0: test[i] = 'H'; break;
-               case 1: test[i] = 'A'; break;
-               case 2: test[i] = 'R'; break;
-               case 3: test[i] = 'B'; break;
-               case 4: test[i] = 'L'; break;
-               }
+               test[i] = p[pos++];
+               pos %= 0x8000;
        }
-       outputf("eth_poll: Attempting to tx");
+       smram_restore_state(old_state);
        _nic->transmit("\x00\x03\x93\x87\x84\x8C", 0x1337, 1024, test);
-       outputf("eth_poll: tx complete");
 }
 
 int eth_register(struct nic *nic)
@@ -48,6 +69,7 @@ int eth_register(struct nic *nic)
 
 void eth_init()
 {
-       if (pci_probe_driver(a3c90x_driver))
-               outputf("found 3c90x, hopefully!");
+       /* Required for DMA to work. :( */
+       smram_tseg_set_state(SMRAM_TSEG_OPEN);
+       pci_probe_driver(a3c90x_driver);
 }