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authorHardik Patel <hardik.patel@volansystech.com>2013-11-27 21:16:21 +0530
committerTom Rini <trini@ti.com>2013-12-04 11:41:13 -0500
commit675cc77a3ae45e8b0ec17128563264d4a509f628 (patch)
treed21bf41dad77f0a08189e0bf8d76d127a411777b /board/ti/panda
parent3558243b6fc80b14a6281bd0e2792672b462684c (diff)
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pandaboard: 1/1] ARM:OMAP4+: panda-es: Support Rev B3 Elpida DDR2 RAM
Signed-off-by: Hardik Patel <hardik.patel@volansystech.com>
Diffstat (limited to 'board/ti/panda')
-rw-r--r--board/ti/panda/panda.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/board/ti/panda/panda.c b/board/ti/panda/panda.c
index c104024..cda09a9 100644
--- a/board/ti/panda/panda.c
+++ b/board/ti/panda/panda.c
@@ -123,6 +123,66 @@ int get_board_revision(void)
}
/**
+ * is_panda_es_rev_b3() - Detect if we are running on rev B3 of panda board ES
+ *
+ *
+ * Detect if we are running on B3 version of ES panda board,
+ * This can be done by reading the level of GPIO 171 and checking the
+ * processor revisions.
+ * GPIO171: 1 => Panda ES Rev B3
+ *
+ * Return : return 1 if Panda ES Rev B3 , else return 0
+ */
+u8 is_panda_es_rev_b3(void)
+{
+ int processor_rev = omap_revision();
+ int ret = 0;
+
+ if ((processor_rev >= OMAP4460_ES1_0 &&
+ processor_rev <= OMAP4460_ES1_1)) {
+
+ /* Setup the mux for the common board ID pins (gpio 171) */
+ writew((IEN | M3),
+ (*ctrl)->control_padconf_core_base + UNIPRO_TX0);
+
+ /* if processor_rev is panda ES and GPIO171 is 1,it is rev b3 */
+ ret = gpio_get_value(PANDA_BOARD_ID_2_GPIO);
+ }
+ return ret;
+}
+
+#ifdef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
+/*
+ * emif_get_reg_dump() - emif_get_reg_dump strong function
+ *
+ * @emif_nr - emif base
+ * @regs - reg dump of timing values
+ *
+ * Strong function to override emif_get_reg_dump weak function in sdram_elpida.c
+ */
+void emif_get_reg_dump(u32 emif_nr, const struct emif_regs **regs)
+{
+ u32 omap4_rev = omap_revision();
+
+ /* Same devices and geometry on both EMIFs */
+ if (omap4_rev == OMAP4430_ES1_0)
+ *regs = &emif_regs_elpida_380_mhz_1cs;
+ else if (omap4_rev == OMAP4430_ES2_0)
+ *regs = &emif_regs_elpida_200_mhz_2cs;
+ else if (omap4_rev == OMAP4430_ES2_3)
+ *regs = &emif_regs_elpida_400_mhz_1cs;
+ else if (omap4_rev < OMAP4470_ES1_0) {
+ if(is_panda_es_rev_b3())
+ *regs = &emif_regs_elpida_400_mhz_1cs;
+ else
+ *regs = &emif_regs_elpida_400_mhz_2cs;
+ }
+ else
+ *regs = &emif_regs_elpida_400_mhz_1cs;
+}
+#endif
+
+/**
* @brief misc_init_r - Configure Panda board specific configurations
* such as power configurations, ethernet initialization as phase2 of
* boot sequence