From 675cc77a3ae45e8b0ec17128563264d4a509f628 Mon Sep 17 00:00:00 2001 From: Hardik Patel Date: Wed, 27 Nov 2013 21:16:21 +0530 Subject: pandaboard: 1/1] ARM:OMAP4+: panda-es: Support Rev B3 Elpida DDR2 RAM Signed-off-by: Hardik Patel --- board/ti/panda/panda.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) (limited to 'board/ti/panda') 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 -- cgit v1.1