* Patch by Thomas Frieden, 13 Nov 2002:

  Add code for AmigaOne board
  (preliminary merge to U-Boot, still WIP)

* Patch by Jon Diekema, 12 Nov 2002:
  - Adding URL for IEEE OUI lookup
  - Making the autoboot #defines dependent on CONFIG_AUTOBOOT_KEYED
    being defined.
  - In the CONFIG_EXTRA_ENV_SETTINGS #define, the root-on-initrd and
    root-on-nfs macros are designed to switch how the default boot
    method gets defined.

1 files changed, 206 insertions, 0 deletions

diff --git a/board/MAI/AmigaOneG3SE/smbus.c b/board/MAI/AmigaOneG3SE/smbus.c
new file mode 100644
index 0000000..616005e
--- /dev/null
+++ b/board/MAI/AmigaOneG3SE/smbus.c
@@ -0,0 +1,206 @@
+#include "memio.h"
+#include "articiaS.h"
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+
+void sm_write_mode(void)
+{
+    out_byte(0xA539, 0x00);
+    out_byte(0xA53A, 0x03);
+}
+
+void sm_read_mode(void)
+{
+    out_byte(0xA53A, 0x02);
+    out_byte(0xA539, 0x02);
+}
+
+void sm_write_byte(uint8 writeme)
+{
+    int i;
+    int level;
+    
+    out_byte(0xA539, 0x00);
+
+    level = 0;
+
+    for (i=0; i<8; i++)
+    {
+	if ((writeme & 0x80) == (level<<7)) 
+        {
+	    /* Bit did not change, rewrite strobe */
+	    out_byte(0xA539, level | 0x02);
+	    out_byte(0xA539, level); 
+	}
+	else
+	{
+	    /* Bit changed, set bit, then strobe */
+	    level = (writeme & 0x80) >> 7;
+	    out_byte(0xA539, level);
+	    out_byte(0xA539, level | 0x02);
+	    out_byte(0xA539, level);
+	}
+	writeme <<= 1;
+    }
+    out_byte(0xA539, 0x00);
+}
+
+uint8 sm_read_byte(void)
+{
+    uint8 retme, r;
+    int i;
+
+    retme = 0;
+    for (i=0; i<8; i++)
+    {
+	retme <<= 1;
+	out_byte(0xA539, 0x00);
+	out_byte(0xA539, 0x02);
+	r = in_byte(0xA538) & 0x01;
+	retme |= r;
+    }
+
+    return retme;
+} 
+
+int sm_get_ack(void)
+{
+    uint8 r;
+    r = in_byte(0xA538);
+    if ((r&0x01) == 0) return TRUE;
+    else return FALSE;
+}
+
+void sm_write_ack(void)
+{
+    out_byte(0xA539, 0x00);
+    out_byte(0xA539, 0x02);
+    out_byte(0xA539, 0x00);
+}
+
+void sm_write_nack(void)
+{
+    out_byte(0xA539, 0x01);
+    out_byte(0xA539, 0x03);
+    out_byte(0xA539, 0x01);
+}
+
+void sm_send_start(void)
+{
+    out_byte(0xA539, 0x03);
+    out_byte(0xA539, 0x02);
+}
+
+void sm_send_stop(void)
+{
+    out_byte(0xA539, 0x02);
+    out_byte(0xA539, 0x03);
+}
+
+int sm_read_byte_from_device(uint8 addr, uint8 reg, uint8 *storage)
+{
+    // S Addr Wr
+    sm_write_mode();
+    sm_send_start();
+    sm_write_byte((addr<<1));
+    
+    // [A]
+    sm_read_mode();
+    if (sm_get_ack() == FALSE) return FALSE;
+
+    // Comm
+    sm_write_mode();
+    sm_write_byte(reg);
+    
+    // [A]
+    sm_read_mode();
+    if (sm_get_ack() == FALSE) return FALSE;
+
+    // S Addr Rd
+    sm_write_mode();
+    sm_send_start();
+    sm_write_byte((addr<<1)|1);
+    
+    // [A]
+    sm_read_mode();
+    if (sm_get_ack() == FALSE) return FALSE;
+
+    // [Data]
+    *storage = sm_read_byte();
+    
+    // NA
+    sm_write_mode();
+    sm_write_nack();
+    sm_send_stop();
+
+    return TRUE;
+}
+
+void sm_init(void)
+{  
+    /* Switch to PMC mode */
+    pci_write_cfg_byte(0, 0, REG_GROUP, (uint8)(REG_GROUP_SPECIAL|REG_GROUP_POWER));
+ 
+    /* Set GPIO Base */
+    pci_write_cfg_long(0, 0, 0x40, 0xa500);
+
+    /* Enable GPIO */
+    pci_write_cfg_byte(0, 0, 0x44, 0x11);
+
+    /* Set both GPIO 0 and 1 as output */
+    out_byte(0xA53A, 0x03); 
+}
+
+
+void sm_term(void)
+{  
+    /* Switch to normal mode */
+    pci_write_cfg_byte(0, 0, REG_GROUP, 0);
+}
+
+
+int sm_get_data(uint8 *DataArray, int dimm_socket)
+{
+    int j;
+
+#if 0
+    /* Switch to PMC mode */
+    pci_write_cfg_byte(0, 0, REG_GROUP, (uint8)(REG_GROUP_SPECIAL|REG_GROUP_POWER));
+ 
+    /* Set GPIO Base */
+    pci_write_cfg_long(0, 0, 0x40, 0xa500);
+
+    /* Enable GPIO */
+    pci_write_cfg_byte(0, 0, 0x44, 0x11);
+
+    /* Set both GPIO 0 and 1 as output */
+    out_byte(0xA53A, 0x03); 
+#endif
+
+    sm_init();
+    /* Start reading the rom */
+
+    j = 0;
+
+    do
+    {
+	if (sm_read_byte_from_device(dimm_socket, (uint8)j, DataArray) == FALSE)
+	{
+	    sm_term();
+	    return FALSE;
+	}
+
+	DataArray++;
+	j++;
+    } while (j < 128);
+
+    sm_term();
+    return TRUE;
+}