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u-boot/arch/arm/mach-omap2/omap5/emif.c

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
// SPDX-License-Identifier: GPL-2.0+
omap5: emif: Add emif/ddr configurations required for omap5 evm Add the emif configurations required for omap5 soc.Add the correct ddr part configurations required for omap5 evm board. EDB8164B3PH from ELPIDA is the part used on the board. Also changes are done to retain some part of the code common for OMAP4/5 and keep only the remaining in the Soc specific directories. Signed-off-by: sricharan <r.sricharan@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-11-15 14:50:00 +00:00
/*
* EMIF programming
*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com> for OMAP4
*/
#include <common.h>
common: Drop log.h from common header Move this header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-10 17:40:05 +00:00
#include <log.h>
omap5: emif: Add emif/ddr configurations required for omap5 evm Add the emif configurations required for omap5 soc.Add the correct ddr part configurations required for omap5 evm board. EDB8164B3PH from ELPIDA is the part used on the board. Also changes are done to retain some part of the code common for OMAP4/5 and keep only the remaining in the Soc specific directories. Signed-off-by: sricharan <r.sricharan@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-11-15 14:50:00 +00:00
#include <asm/emif.h>
#include <asm/arch/sys_proto.h>
#include <asm/utils.h>
#ifndef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
#define print_timing_reg(reg) debug(#reg" - 0x%08x\n", (reg))
ARM: OMAP4/5: Make OMAPx_SRAM_SCRATCH_ defines common These defines are same across OMAP4/5. So move them to omap_common.h. This is required for the patches that follow. Signed-off-by: Sricharan R <r.sricharan@ti.com>
2013-04-24 00:41:22 +00:00
static u32 *const T_num = (u32 *)OMAP_SRAM_SCRATCH_EMIF_T_NUM;
static u32 *const T_den = (u32 *)OMAP_SRAM_SCRATCH_EMIF_T_DEN;
omap5: emif: Add emif/ddr configurations required for omap5 evm Add the emif configurations required for omap5 soc.Add the correct ddr part configurations required for omap5 evm board. EDB8164B3PH from ELPIDA is the part used on the board. Also changes are done to retain some part of the code common for OMAP4/5 and keep only the remaining in the Soc specific directories. Signed-off-by: sricharan <r.sricharan@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-11-15 14:50:00 +00:00
#endif
#ifdef CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS
/* Base AC Timing values specified by JESD209-2 for 532MHz operation */
static const struct lpddr2_ac_timings timings_jedec_532_mhz = {
.max_freq = 532000000,
.RL = 8,
.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
};
/*
* 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_532_mhz
};
static 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 = NULL;
}
#endif /* CONFIG_SYS_DEFAULT_LPDDR2_TIMINGS */
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