pcmcia/yenta: add module parameter for O2 speedups

[net-next-2.6.git] / drivers / pcmcia / o2micro.h

diff --git a/drivers/pcmcia/o2micro.h b/drivers/pcmcia/o2micro.h
index 624442fc0d35ceb7d609be947fb2c7dda2e20d5d..e74bebac26950b2c9d5869c310f835ef99662b64 100644 (file)
--- a/drivers/pcmcia/o2micro.h
+++ b/drivers/pcmcia/o2micro.h
@@ -116,13 +116,12 @@ static int o2micro_override(struct yenta_socket *socket)
         * from Eric Still, 02Micro.
         */
        u8 a, b;
+       bool use_speedup;
 
        if (PCI_FUNC(socket->dev->devfn) == 0) {
                a = config_readb(socket, O2_RESERVED1);
                b = config_readb(socket, O2_RESERVED2);
-
-               dev_printk(KERN_INFO, &socket->dev->dev,
-                          "O2: res at 0x94/0xD4: %02x/%02x\n", a, b);
+               dev_dbg(&socket->dev->dev, "O2: 0x94/0xD4: %02x/%02x\n", a, b);
 
                switch (socket->dev->device) {
                /*
@@ -135,23 +134,37 @@ static int o2micro_override(struct yenta_socket *socket)
                case PCI_DEVICE_ID_O2_6812:
                case PCI_DEVICE_ID_O2_6832:
                case PCI_DEVICE_ID_O2_6836:
-               case PCI_DEVICE_ID_O2_6933:
-                       dev_printk(KERN_INFO, &socket->dev->dev,
-                                  "Yenta O2: old bridge, disabling read "
-                                  "prefetch/write burst\n");
-                       config_writeb(socket, O2_RESERVED1,
-                                     a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
-                       config_writeb(socket, O2_RESERVED2,
-                                     b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
+               case PCI_DEVICE_ID_O2_6933:
+                       use_speedup = false;
                        break;
-
                default:
-                       dev_printk(KERN_INFO , &socket->dev->dev,
-                                  "O2: enabling read prefetch/write burst\n");
+                       use_speedup = true;
+                       break;
+               }
+
+               /* the user may override our decision */
+               if (strcasecmp(o2_speedup, "on") == 0)
+                       use_speedup = true;
+               else if (strcasecmp(o2_speedup, "off") == 0)
+                       use_speedup = false;
+               else if (strcasecmp(o2_speedup, "default") != 0)
+                       dev_warn(&socket->dev->dev,
+                               "O2: Unknown parameter, using 'default'");
+
+               if (use_speedup) {
+                       dev_info(&socket->dev->dev,
+                               "O2: enabling read prefetch/write burst\n");
+                       config_writeb(socket, O2_RESERVED1,
+                                     a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
+                       config_writeb(socket, O2_RESERVED2,
+                                     b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
+               } else {
+                       dev_info(&socket->dev->dev,
+                               "O2: disabling read prefetch/write burst\n");
                        config_writeb(socket, O2_RESERVED1,
-                                     a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
+                                     a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
                        config_writeb(socket, O2_RESERVED2,
-                                     b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
+                                     b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
                }
        }