SPI checking switch registers

spi_switch_Unb2c.py

@@ -18,6 +18,7 @@ file used to read and write to switch registers
 """
 
 import time
+import sys
 import spidev
 
 DEBUG=False
@@ -57,7 +58,7 @@ def write_register(addr, data):
         stri = 'write_register 0x{:0>2x} = 0x{:0>2x}'.format(addr, data)
         print(stri)
 
-def read_switch(page, addr):
+def read_switch(page, addr, pr_stri = True):
     stri = '<< read switch from page: 0x{0:0>2x}, address: 0x{1:0>2x}'.format(page, addr)
     ret = spi.xfer2([cmd_normal_write, 0xff, page])
     ret = spi.xfer2([cmd_normal_read, addr, 0, 0, 0, 0])
@@ -65,19 +66,20 @@ def read_switch(page, addr):
     if (ret[2] & 0xf0) == 0xa0:
         ret = read_register(0xf0)
         ret.reverse()
+        if pr_stri:
             stri += " data 0x"
             for byte in ret:
                 stri += "{:0>2x}".format(byte) 
             print(stri)
     else:
         print("read error")
+    return ret
 
 def write_switch_bytes(page, addr, data):
     stri = '> write switch from page: 0x{0:0>2x}, address: 0x{1:0>2x} data 0x'.format(page, addr)
-    pl_bytes = data
-    pl_bytes.reverse()
-    for data_byte in pl_bytes:
-        add_stri = "{0:0>2x}".format(data_byte)
+    for byte_cnt in range(len(data)):
+#        add_stri = "{0:0>2x}".format(data[len(data)-1-byte_cnt])
+        add_stri = "{0:0>2x}".format(data[-1-byte_cnt])
         stri += add_stri
     print(stri)
     read_register(0xfe)
@@ -85,12 +87,59 @@ def write_switch_bytes(page, addr, data):
     wr_bytes = [cmd_normal_write, addr]
     wr_bytes.extend(data)
     ret = spi.xfer2(wr_bytes)
-    print("SPI status reg 0x{:0>2x}".format(read_register(0xfe)[2]))
+    ret = read_register(0xfe)[2]
+    if ret != 0:
+        print("write error, not enough words written")
     if DEBUG:
         read_register(0xfe)
         read_register(0xfe)
         read_register(addr)
 
+def read_link_status(ports=4):
+    print("links status register")
+    ret = read_switch(0x01,0x00, pr_stri=False)
+    stri = "|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |"
+    print(stri)
+    stri = "| "
+    for cnt_port in range(16):
+        if ret[3]  & (0x8000 >> cnt_port) :
+            stri += "U | "
+        else:
+            stri += "  | "
+    print(stri)
+    for cnt in range(ports):
+        stri = "Port status phy nr {} ".format(cnt)
+        ret = read_switch(0x01,0x20+cnt, pr_stri = False)
+        if ret[1] & 0x01:
+            stri += "link up "
+            if ret[1] & 0x02:
+                stri += "dupplex "
+            else:
+                stri += "simplex "
+            if ret[1] & 0x4:
+                stri += " 100M "
+            elif ret[1] & 0x8:
+                stri += "1000M "
+            else:
+                stri += "  10M "
+            ret = read_switch(0x10+cnt,0x28, pr_stri = False)
+            if ret[1] & 0x01:
+                stri += "SGMII  "
+            else:
+                stri += "SERDES "
+            if ret[2] & 0x08:
+                stri += "Tx: Er "
+            if ret[2] & 0x04:
+                stri += "Rx: Er "
+            if ret[2] & 0x40:
+                stri += "Rx FIFO: Er "
+        else:
+            stri += "link down "
+        print(stri)
+# Read phy registister status
+#        read_switch(0x80+cnt,0x1e)
+
+
 
 # Open a connection to a specific bus and device (chip select pin)
 spi.open(bus, device)
@@ -100,21 +149,53 @@ spi.max_speed_hz = 1000000
 #spi.max_speed_hz = 50000
 spi.mode = 1
 
+
+if len(sys.argv) < 2:
+    print(sys.argv)
     print("write and read led register")
-write_switch_bytes(0x00, 0x24, [0x20, 0x02]) # lsb first
+    write_switch_bytes(0x00, 0x24, [0x20, 0x02]) #LSB first
     read_switch(0x00,0x24)
-print("links status register")
-read_switch(0x01,0x00)
+    print("write and read jumbo register")
+    write_switch_bytes(0x40, 0x01, [0xff, 0xff, 0x00, 0x00])
+    read_switch(0x40,0x01)
+    print("strap resistors")
+    read_switch(0x01,0x70)
+    read_link_status(4)
+elif sys.argv[1] == "stat":
+    read_link_status(4)
+elif sys.argv[1] == "set":
+    print("write and read led register")
+    write_switch_bytes(0x00, 0x24, [0x20, 0x02]) #LSB first
+    read_switch(0x00,0x24)
+    print("write and read jumbo register")
+    write_switch_bytes(0x40, 0x01, [0xff, 0xff, 0x00, 0x00])
+    read_switch(0x40,0x01)
     print("strap resistors")
     read_switch(0x01,0x70)
-for cnt in range(4):
-    print("Port status phy nr {}".format(cnt))
-    read_switch(0x01,0x20+cnt)
+    print("write and read SGMII register CH0")
+    write_switch_bytes(0x10, 0x24, [0x44, 0x00])
+    read_switch(0x10,0x24)
+    print("write and read SGMII register CH3")
+    write_switch_bytes(0x13, 0x24, [0x44, 0x00])
+    read_switch(0x13,0x24)
+else:
+    print("spi_switch_Unb2c stat for status")
+    print("spi_switch_Unb2c set  to set registers")
+# Not working as espected
+#print("switch off ch 0")
+#write_switch_bytes(0x10, 0x00, [0x18, 0x40, 0x18, 0x40])
+#read_switch(0x10,0x00)
+
+
+if 0:
     print("Tx pause status ")
     read_switch(0x01,0x14)
     print("Rx pause status ")
     read_switch(0x01,0x18)
-write_switch_bytes(0x30, 0x00, [0x40]) # lsb first
+    write_switch_bytes(0x30, 0x00, [0x40])
     read_switch(0x30,0x00)
+    write_switch_bytes(0x00, 0x20, [0x11])
+    read_switch(0x00,0x20)
+
 
 spi.close()