Merge branch 'u-boot-imx/master' into 'u-boot-arm/master'

[karo-tx-uboot.git] / arch / powerpc / cpu / mpc512x / iopin.c

diff --git a/arch/powerpc/cpu/mpc512x/iopin.c b/arch/powerpc/cpu/mpc512x/iopin.c
index be209476232603c33968a77621774a82fb0e8a1d..1a391016229558aceb0dde01f5943e845cae9dbd 100644 (file)
--- a/arch/powerpc/cpu/mpc512x/iopin.c
+++ b/arch/powerpc/cpu/mpc512x/iopin.c
@@ -47,3 +47,57 @@ void iopin_initialize(iopin_t *ioregs_init, int len)
        }
        return;
 }
+
+void iopin_initialize_bits(iopin_t *ioregs_init, int len)
+{
+       short i, j, p;
+       u32 *reg, mask;
+       immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
+
+       reg = (u32 *)&(im->io_ctrl);
+
+       /* iterate over table entries */
+       for (i = 0; i < len; i++) {
+               /* iterate over pins within a table entry */
+               for (p = 0, j = ioregs_init[i].p_offset / sizeof(u_long);
+                       p < ioregs_init[i].nr_pins; p++, j++) {
+                       if (ioregs_init[i].bit_or & IO_PIN_OVER_EACH) {
+                               /* replace all settings at once */
+                               out_be32(reg + j, ioregs_init[i].val);
+                       } else {
+                               /*
+                                * only replace individual parts, but
+                                * REPLACE them instead of just ORing
+                                * them in and "inheriting" previously
+                                * set bits which we don't want
+                                */
+                               mask = 0;
+                               if (ioregs_init[i].bit_or & IO_PIN_OVER_FMUX)
+                                       mask |= IO_PIN_FMUX(3);
+
+                               if (ioregs_init[i].bit_or & IO_PIN_OVER_HOLD)
+                                       mask |= IO_PIN_HOLD(3);
+
+                               if (ioregs_init[i].bit_or & IO_PIN_OVER_PULL)
+                                       mask |= IO_PIN_PUD(1) | IO_PIN_PUE(1);
+
+                               if (ioregs_init[i].bit_or & IO_PIN_OVER_STRIG)
+                                       mask |= IO_PIN_ST(1);
+
+                               if (ioregs_init[i].bit_or & IO_PIN_OVER_DRVSTR)
+                                       mask |= IO_PIN_DS(3);
+                               /*
+                                * DON'T do the "mask, then insert"
+                                * in place on the register, it may
+                                * break access to external hardware
+                                * (like boot ROMs) when configuring
+                                * LPB related pins, while the code to
+                                * configure the pin is read from this
+                                * very address region
+                                */
+                               clrsetbits_be32(reg + j, mask,
+                                               ioregs_init[i].val & mask);
+                       }
+               }
+       }
+}