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| author | Fabio Estevam <fabio.estevam@nxp.com> | 2016-08-29 20:37:15 -0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-09-06 18:22:48 +0200 |
| commit | edf0093732225c2fd0791c3864e9a3eef1f92f19 (patch) | |
| tree | 1a5bce06d282527778b608f35c39aa68065bd98e /board/freescale | |
| parent | 946db0cbd01090b35eb1439fa7c4ca7e015fc18b (diff) | |
| download | u-boot-imx-edf0093732225c2fd0791c3864e9a3eef1f92f19.zip u-boot-imx-edf0093732225c2fd0791c3864e9a3eef1f92f19.tar.gz u-boot-imx-edf0093732225c2fd0791c3864e9a3eef1f92f19.tar.bz2 | |
mx6: ddr: Allow changing REFSEL and REFR fields
Currently MX6 SPL DDR initialization hardcodes the REF_SEL and
REFR fields of the MDREF register as 1 and 7, respectively for
DDR3 and 0 and 3 for LPDDR2.
Looking at the MDREF initialization done via DCD we see that
boards do need to initialize these fields differently:
$ git grep 0x021b0020 board/
board/bachmann/ot1200/mx6q_4x_mt41j128.cfg:DATA 4 0x021b0020 0x00005800
board/ccv/xpress/imximage.cfg:DATA 4 0x021b0020 0x00000800 /* MMDC0_MDREF */
board/freescale/mx6qarm2/imximage.cfg:DATA 4 0x021b0020 0x7800
board/freescale/mx6qarm2/imximage.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qarm2/imximage_mx6dl.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qarm2/imximage_mx6dl.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qsabreauto/imximage.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qsabreauto/mx6dl.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6qsabreauto/mx6qp.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6sabresd/mx6dlsabresd.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6sabresd/mx6q_4x_mt41j128.cfg:DATA 4 0x021b0020 0x00005800
board/freescale/mx6slevk/imximage.cfg:DATA 4 0x021b0020 0x00001800
board/freescale/mx6sxsabreauto/imximage.cfg:DATA 4 0x021b0020 0x00000800
board/freescale/mx6sxsabresd/imximage.cfg:DATA 4 0x021b0020 0x00000800
board/warp/imximage.cfg:DATA 4 0x021b0020 0x00001800
So introduce a mechanism for users to be able to configure
REFSEL and REFR fields as needed.
Keep all the mx6 SPL users in their current REF_SEL and REFR values,
so no functional changes for the existing users.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Eric Nelson <eric@nelint.com>
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/mx6sabresd/mx6sabresd.c | 2 | ||||
| -rw-r--r-- | board/freescale/mx6slevk/mx6slevk.c | 2 | ||||
| -rw-r--r-- | board/freescale/mx6sxsabresd/mx6sxsabresd.c | 2 | ||||
| -rw-r--r-- | board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c | 4 |
4 files changed, 10 insertions, 0 deletions
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c index 0cf6809..f836ecb 100644 --- a/board/freescale/mx6sabresd/mx6sabresd.c +++ b/board/freescale/mx6sabresd/mx6sabresd.c @@ -854,6 +854,8 @@ static void spl_dram_init(void) .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */ .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */ .ddr_type = DDR_TYPE_DDR3, + .refsel = 1, /* Refresh cycles at 32KHz */ + .refr = 7, /* 8 refresh commands per refresh cycle */ }; if (is_mx6dqp()) { diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c index f978e50..96c0e8c 100644 --- a/board/freescale/mx6slevk/mx6slevk.c +++ b/board/freescale/mx6slevk/mx6slevk.c @@ -494,6 +494,8 @@ static void spl_dram_init(void) .sde_to_rst = 0, /* LPDDR2 does not need this field */ .rst_to_cke = 0x10, /* JEDEC value for LPDDR2: 200us */ .ddr_type = DDR_TYPE_LPDDR2, + .refsel = 0, /* Refresh cycles at 64KHz */ + .refr = 3, /* 4 refresh commands per refresh cycle */ }; mx6sl_dram_iocfg(32, &mx6_ddr_ioregs, &mx6_grp_ioregs); mx6_dram_cfg(&sysinfo, &mx6_mmcd_calib, &mem_ddr); diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c index 8d95c51..965e511 100644 --- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c +++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c @@ -637,6 +637,8 @@ static void spl_dram_init(void) .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */ .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */ .ddr_type = DDR_TYPE_DDR3, + .refsel = 1, /* Refresh cycles at 32KHz */ + .refr = 7, /* 8 refresh commands per refresh cycle */ }; mx6sx_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs); diff --git a/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c b/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c index 5938c16..32953ae 100644 --- a/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c +++ b/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c @@ -764,6 +764,8 @@ struct mx6_ddr_sysinfo ddr_sysinfo = { .sde_to_rst = 0, /* LPDDR2 does not need this field */ .rst_to_cke = 0x10, /* JEDEC value for LPDDR2: 200us */ .ddr_type = DDR_TYPE_LPDDR2, + .refsel = 0, /* Refresh cycles at 64KHz */ + .refr = 3, /* 4 refresh commands per refresh cycle */ }; #else @@ -802,6 +804,8 @@ struct mx6_ddr_sysinfo ddr_sysinfo = { .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */ .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */ .ddr_type = DDR_TYPE_DDR3, + .refsel = 1, /* Refresh cycles at 32KHz */ + .refr = 7, /* 8 refresh commands per refresh cycle */ }; static struct mx6_ddr3_cfg mem_ddr = { |