Support for the third ethernet port on Titan 1.2

[Manish Lachwani <mlachwani@mvista.com>]

Hello Ralf

Attached patch initializes port #2 of the titan 1.2 GE subsystem in 2.6.
Note that this patch does not allocate irq for the port yet since the
plan is to implement allocate_irqno() as discussed earlier.

Thanks
Manish Lachwani

--- drivers/net/titan_ge.c.orig 2004-10-20 13:46:58.000000000 -0700
+++ drivers/net/titan_ge.c      2004-10-20 14:59:43.000000000 -0700
@@ -470,6 +470,9 @@
                        if (port_num == 1)
                                ack &= ~(0x300);
 
+                       if (port_num == 2)
+                               ack &= ~(0x30000);
+
                        /* Interrupts have been disabled */
                        TITAN_GE_WRITE(TITAN_GE_INTR_XDMA_IE, ack);
 
@@ -911,6 +914,52 @@
                TITAN_GE_WRITE(0x494c, reg_data);
        }
 
+       /*
+        * Titan 1.2 revision does support port #2
+        */
+       if (port_num == 2) {
+               /*
+                * Put the descriptors in the SRAM
+                */
+               reg_data = TITAN_GE_READ(0x48a0);
+
+               reg_data |= 0x100000;
+               reg_data |= (0xff << 10) | (2*(0xff + 1));
+
+               TITAN_GE_WRITE(0x48a0, reg_data);
+               /*
+                * BAV2,BAV and DAV settings for the Rx FIFO
+                */
+               reg_data1 = TITAN_GE_READ(0x48a4);
+               reg_data1 |= ( (0x10 << 20) | (0x10 << 10) | 0x1);
+               TITAN_GE_WRITE(0x48a4, reg_data1);
+
+               reg_data &= ~(0x00100000);
+               reg_data |= 0x200000;
+
+               TITAN_GE_WRITE(0x48a0, reg_data);
+               
+               reg_data = TITAN_GE_READ(0x4958);
+               reg_data |= 0x100000;
+
+               TITAN_GE_WRITE(0x4958, reg_data);
+               reg_data |= (0xff << 10) | (2*(0xff + 1));
+               TITAN_GE_WRITE(0x4958, reg_data);
+
+               /*
+                * BAV2, BAV and DAV settings for the Tx FIFO
+                */
+               reg_data1 = TITAN_GE_READ(0x495c);
+               reg_data1 = ( (0x1 << 20) | (0x1 << 10) | 0x10);
+
+               TITAN_GE_WRITE(0x495c, reg_data1);
+
+               reg_data &= ~(0x00100000);
+               reg_data |= 0x200000;
+
+               TITAN_GE_WRITE(0x4958, reg_data);
+       }
+
        if (port_num == 2) {
                reg_data = TITAN_GE_READ(0x48a0);
 
@@ -1034,6 +1083,9 @@
                reg_data1 |= 0x300;
        }
 
+       if (port_num == 2)
+               reg_data1 |= 0x30000;
+
        TITAN_GE_WRITE(TITAN_GE_INTR_XDMA_IE, reg_data1);
        TITAN_GE_WRITE(0x003c, 0x300);
 
@@ -2038,6 +2090,13 @@
                printk(KERN_ERR "Error registering the TITAN Ethernet"
                                "driver for port 1\n");
 
+       /*
+        * Titan 1.2 does support port #2
+        */
+       if (titan_ge_init(2))
+               printk(KERN_ERR "Error registering the TITAN Ethernet"
+                               "driver for port 2\n");
+
        return 0;
 
 out_unmap_ge: