Fix RTL8019AS init for Toshiba RBTX49xx boards

    Ensure that 8-bit mode is selected for the on-board Realtek RTL8019AS chip
on Toshiba RBHMA4x00, get rid of the duplicate #ifdef's when setting
ei_status.word16.
    The chip's datasheet says that the PSTOP register shouldn't exceed 0x60 in
8-bit mode -- ensure this too.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>

1 files changed, 19 insertions, 12 deletions

diff --git a/drivers/net/ne.c b/drivers/net/ne.c
index 93c494bcd18d..b32765215f75 100644
--- a/drivers/net/ne.c
+++ b/drivers/net/ne.c
@@ -139,8 +139,9 @@ bad_clone_list[] __initdata = {
 
 #if defined(CONFIG_PLAT_MAPPI)
 #  define DCR_VAL 0x4b
-#elif defined(CONFIG_PLAT_OAKS32R)
-#  define DCR_VAL 0x48
+#elif defined(CONFIG_PLAT_OAKS32R)  || \
+   defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
+#  define DCR_VAL 0x48          /* 8-bit mode */
 #else
 #  define DCR_VAL 0x49
 #endif
@@ -396,10 +397,22 @@ static int __init ne_probe1(struct net_device *dev, int ioaddr)
                 /* We must set the 8390 for word mode. */
                 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
                 start_page = NESM_START_PG;
-                stop_page = NESM_STOP_PG;
+
+                /*
+                 * Realtek RTL8019AS datasheet says that the PSTOP register
+                 * shouldn't exceed 0x60 in 8-bit mode.
+                 * This chip can be identified by reading the signature from
+                 * the  remote byte count registers (otherwise write-only)...
+                 */
+                if ((DCR_VAL & 0x01) == 0 &&            /* 8-bit mode */
+                    inb(ioaddr + EN0_RCNTLO) == 0x50 &&
+                    inb(ioaddr + EN0_RCNTHI) == 0x70)
+                        stop_page = 0x60;
+                else
+                        stop_page = NESM_STOP_PG;
         } else {
                 start_page = NE1SM_START_PG;
-                stop_page = NE1SM_STOP_PG;
+                stop_page  = NE1SM_STOP_PG;
         }
 
 #if  defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
@@ -509,15 +522,9 @@ static int __init ne_probe1(struct net_device *dev, int ioaddr)
         ei_status.name = name;
         ei_status.tx_start_page = start_page;
         ei_status.stop_page = stop_page;
-#if defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
-        wordlength = 1;
-#endif
 
-#ifdef CONFIG_PLAT_OAKS32R
-        ei_status.word16 = 0;
-#else
-        ei_status.word16 = (wordlength == 2);
-#endif
+        /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
+        ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
 
         ei_status.rx_start_page = start_page + TX_PAGES;
 #ifdef PACKETBUF_MEMSIZE