[POWERPC] 83xx: Handle mpc8360 rev. 2.1 RGMII timing erratum

If on a rev. 2.1, adjust UCC clock and data timing characteristics
as specified in the rev.2.1 erratum #2.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 28 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/83xx/mpc836x_mds.c b/arch/powerpc/platforms/83xx/mpc836x_mds.c
index 0f3855c95ff5..0a722601a2f0 100644
--- a/arch/powerpc/platforms/83xx/mpc836x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc836x_mds.c
@@ -96,14 +96,39 @@ static void __init mpc836x_mds_setup_arch(void)
 
         if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
                         != NULL){
+                uint svid;
+
                 /* Reset the Ethernet PHY */
-                bcsr_regs[9] &= ~0x20;
+#define BCSR9_GETHRST 0x20
+                clrbits8(&bcsr_regs[9], BCSR9_GETHRST);
                 udelay(1000);
-                bcsr_regs[9] |= 0x20;
+                setbits8(&bcsr_regs[9], BCSR9_GETHRST);
+
+                /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
+                svid = mfspr(SPRN_SVR);
+                if (svid == 0x80480021) {
+                        void __iomem *immap;
+
+                        immap = ioremap(get_immrbase() + 0x14a8, 8);
+
+                        /*
+                         * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
+                         * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
+                         */
+                        setbits32(immap, 0x0c003000);
+
+                        /*
+                         * IMMR + 0x14AC[20:27] = 10101010
+                         * (data delay for both UCC's)
+                         */
+                        clrsetbits_be32(immap + 4, 0xff0, 0xaa0);
+
+                        iounmap(immap);
+                }
+
                 iounmap(bcsr_regs);
                 of_node_put(np);
         }
-
 #endif                          /* CONFIG_QUICC_ENGINE */
 }