diff options
Diffstat (limited to 'arch/arm/cpu/armv7/omap4/emif.c')
-rw-r--r-- | arch/arm/cpu/armv7/omap4/emif.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/arch/arm/cpu/armv7/omap4/emif.c b/arch/arm/cpu/armv7/omap4/emif.c deleted file mode 100644 index 403c3c6..0000000 --- a/arch/arm/cpu/armv7/omap4/emif.c +++ /dev/null @@ -1,112 +0,0 @@ -/* - * EMIF programming - * - * (C) Copyright 2010 - * Texas Instruments, <www.ti.com> - * - * Aneesh V <aneesh@ti.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/emif.h> -#include <asm/arch/sys_proto.h> -#include <asm/utils.h> - -#ifndef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS -u32 *const T_num = (u32 *)OMAP_SRAM_SCRATCH_EMIF_T_NUM; -u32 *const T_den = (u32 *)OMAP_SRAM_SCRATCH_EMIF_T_DEN; -#endif - -#ifdef CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS -/* Base AC Timing values specified by JESD209-2 for 400MHz operation */ -static const struct lpddr2_ac_timings timings_jedec_400_mhz = { - .max_freq = 400000000, - .RL = 6, - .tRPab = 21, - .tRCD = 18, - .tWR = 15, - .tRASmin = 42, - .tRRD = 10, - .tWTRx2 = 15, - .tXSR = 140, - .tXPx2 = 15, - .tRFCab = 130, - .tRTPx2 = 15, - .tCKE = 3, - .tCKESR = 15, - .tZQCS = 90, - .tZQCL = 360, - .tZQINIT = 1000, - .tDQSCKMAXx2 = 11, - .tRASmax = 70, - .tFAW = 50 -}; - -/* Base AC Timing values specified by JESD209-2 for 200 MHz operation */ -static const struct lpddr2_ac_timings timings_jedec_200_mhz = { - .max_freq = 200000000, - .RL = 3, - .tRPab = 21, - .tRCD = 18, - .tWR = 15, - .tRASmin = 42, - .tRRD = 10, - .tWTRx2 = 20, - .tXSR = 140, - .tXPx2 = 15, - .tRFCab = 130, - .tRTPx2 = 15, - .tCKE = 3, - .tCKESR = 15, - .tZQCS = 90, - .tZQCL = 360, - .tZQINIT = 1000, - .tDQSCKMAXx2 = 11, - .tRASmax = 70, - .tFAW = 50 -}; - -/* - * Min tCK values specified by JESD209-2 - * Min tCK specifies the minimum duration of some AC timing parameters in terms - * of the number of cycles. If the calculated number of cycles based on the - * absolute time value is less than the min tCK value, min tCK value should - * be used instead. This typically happens at low frequencies. - */ -static const struct lpddr2_min_tck min_tck_jedec = { - .tRL = 3, - .tRP_AB = 3, - .tRCD = 3, - .tWR = 3, - .tRAS_MIN = 3, - .tRRD = 2, - .tWTR = 2, - .tXP = 2, - .tRTP = 2, - .tCKE = 3, - .tCKESR = 3, - .tFAW = 8 -}; - -static const struct lpddr2_ac_timings const* - jedec_ac_timings[MAX_NUM_SPEEDBINS] = { - &timings_jedec_200_mhz, - &timings_jedec_400_mhz -}; - -const struct lpddr2_device_timings jedec_default_timings = { - .ac_timings = jedec_ac_timings, - .min_tck = &min_tck_jedec -}; - -void emif_get_device_timings(u32 emif_nr, - const struct lpddr2_device_timings **cs0_device_timings, - const struct lpddr2_device_timings **cs1_device_timings) -{ - /* Assume Identical devices on EMIF1 & EMIF2 */ - *cs0_device_timings = &jedec_default_timings; - *cs1_device_timings = &jedec_default_timings; -} -#endif /* CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS */ |