[U-Boot] [PATCH v3 1/2] mx6sabresd: Make SPL DDR configuration to match the DCD table
Fabio Estevam
festevam at gmail.com
Mon Sep 26 14:14:25 CEST 2016
From: Fabio Estevam <fabio.estevam at nxp.com>
When using SPL on i.mx6 we frequently notice some DDR initialization
mismatches between the SPL code and the non-SPL code.
This causes stability issues like the ones reported at 7dbda25ecd6d7c
("mx6ul_14x14_evk: Pass refsel and refr fields to avoid hang") and also:
http://lists.denx.de/pipermail/u-boot/2016-September/266355.html .
As the non-SPL code have been tested for long time and proves to be reliable,
let's configure the DDR in the exact same way as the non-SPL case.
The idea is simple: just use the DCD table and write directly to the DDR
registers.
Retrieved the DCD tables from:
board/freescale/mx6sabresd/mx6q_4x_mt41j128.cfg
and
board/freescale/mx6sabresd/mx6qp.cfg
(NXP U-Boot branch imx_v2015.04_4.1.15_1.0.0_ga)
This method makes it easier for people converting from non-SPL to SPL code.
Other benefit is that the SPL binary size is reduced from 44 kB to 39.9 kB.
Signed-off-by: Fabio Estevam <fabio.estevam at nxp.com>
---
Changes since v1:
- Use the correct mx6qp dcd table
- Create ddr_init() to write the DCD values
- Specify where the DCD tables come from
board/freescale/mx6sabresd/mx6sabresd.c | 351 ++++++++++++++++++--------------
1 file changed, 197 insertions(+), 154 deletions(-)
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index f836ecb..3c36395 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -682,125 +682,6 @@ int checkboard(void)
#include <spl.h>
#include <libfdt.h>
-const struct mx6dq_iomux_ddr_regs mx6_ddr_ioregs = {
- .dram_sdclk_0 = 0x00020030,
- .dram_sdclk_1 = 0x00020030,
- .dram_cas = 0x00020030,
- .dram_ras = 0x00020030,
- .dram_reset = 0x00020030,
- .dram_sdcke0 = 0x00003000,
- .dram_sdcke1 = 0x00003000,
- .dram_sdba2 = 0x00000000,
- .dram_sdodt0 = 0x00003030,
- .dram_sdodt1 = 0x00003030,
- .dram_sdqs0 = 0x00000030,
- .dram_sdqs1 = 0x00000030,
- .dram_sdqs2 = 0x00000030,
- .dram_sdqs3 = 0x00000030,
- .dram_sdqs4 = 0x00000030,
- .dram_sdqs5 = 0x00000030,
- .dram_sdqs6 = 0x00000030,
- .dram_sdqs7 = 0x00000030,
- .dram_dqm0 = 0x00020030,
- .dram_dqm1 = 0x00020030,
- .dram_dqm2 = 0x00020030,
- .dram_dqm3 = 0x00020030,
- .dram_dqm4 = 0x00020030,
- .dram_dqm5 = 0x00020030,
- .dram_dqm6 = 0x00020030,
- .dram_dqm7 = 0x00020030,
-};
-
-const struct mx6dq_iomux_ddr_regs mx6dqp_ddr_ioregs = {
- .dram_sdclk_0 = 0x00000030,
- .dram_sdclk_1 = 0x00000030,
- .dram_cas = 0x00000030,
- .dram_ras = 0x00000030,
- .dram_reset = 0x00000030,
- .dram_sdcke0 = 0x00003000,
- .dram_sdcke1 = 0x00003000,
- .dram_sdba2 = 0x00000000,
- .dram_sdodt0 = 0x00003030,
- .dram_sdodt1 = 0x00003030,
- .dram_sdqs0 = 0x00000030,
- .dram_sdqs1 = 0x00000030,
- .dram_sdqs2 = 0x00000030,
- .dram_sdqs3 = 0x00000030,
- .dram_sdqs4 = 0x00000030,
- .dram_sdqs5 = 0x00000030,
- .dram_sdqs6 = 0x00000030,
- .dram_sdqs7 = 0x00000030,
- .dram_dqm0 = 0x00000030,
- .dram_dqm1 = 0x00000030,
- .dram_dqm2 = 0x00000030,
- .dram_dqm3 = 0x00000030,
- .dram_dqm4 = 0x00000030,
- .dram_dqm5 = 0x00000030,
- .dram_dqm6 = 0x00000030,
- .dram_dqm7 = 0x00000030,
-};
-
-const struct mx6dq_iomux_grp_regs mx6_grp_ioregs = {
- .grp_ddr_type = 0x000C0000,
- .grp_ddrmode_ctl = 0x00020000,
- .grp_ddrpke = 0x00000000,
- .grp_addds = 0x00000030,
- .grp_ctlds = 0x00000030,
- .grp_ddrmode = 0x00020000,
- .grp_b0ds = 0x00000030,
- .grp_b1ds = 0x00000030,
- .grp_b2ds = 0x00000030,
- .grp_b3ds = 0x00000030,
- .grp_b4ds = 0x00000030,
- .grp_b5ds = 0x00000030,
- .grp_b6ds = 0x00000030,
- .grp_b7ds = 0x00000030,
-};
-
-const struct mx6_mmdc_calibration mx6_mmcd_calib = {
- .p0_mpwldectrl0 = 0x001F001F,
- .p0_mpwldectrl1 = 0x001F001F,
- .p1_mpwldectrl0 = 0x00440044,
- .p1_mpwldectrl1 = 0x00440044,
- .p0_mpdgctrl0 = 0x434B0350,
- .p0_mpdgctrl1 = 0x034C0359,
- .p1_mpdgctrl0 = 0x434B0350,
- .p1_mpdgctrl1 = 0x03650348,
- .p0_mprddlctl = 0x4436383B,
- .p1_mprddlctl = 0x39393341,
- .p0_mpwrdlctl = 0x35373933,
- .p1_mpwrdlctl = 0x48254A36,
-};
-
-const struct mx6_mmdc_calibration mx6dqp_mmcd_calib = {
- .p0_mpwldectrl0 = 0x001B001E,
- .p0_mpwldectrl1 = 0x002E0029,
- .p1_mpwldectrl0 = 0x001B002A,
- .p1_mpwldectrl1 = 0x0019002C,
- .p0_mpdgctrl0 = 0x43240334,
- .p0_mpdgctrl1 = 0x0324031A,
- .p1_mpdgctrl0 = 0x43340344,
- .p1_mpdgctrl1 = 0x03280276,
- .p0_mprddlctl = 0x44383A3E,
- .p1_mprddlctl = 0x3C3C3846,
- .p0_mpwrdlctl = 0x2E303230,
- .p1_mpwrdlctl = 0x38283E34,
-};
-
-/* MT41K128M16JT-125 */
-static struct mx6_ddr3_cfg mem_ddr = {
- .mem_speed = 1600,
- .density = 2,
- .width = 16,
- .banks = 8,
- .rowaddr = 14,
- .coladdr = 10,
- .pagesz = 2,
- .trcd = 1375,
- .trcmin = 4875,
- .trasmin = 3500,
-};
-
static void ccgr_init(void)
{
struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
@@ -831,44 +712,209 @@ static void gpr_init(void)
}
}
-/*
- * This section requires the differentiation between iMX6 Sabre boards, but
- * for now, it will configure only for the mx6q variant.
- */
-static void spl_dram_init(void)
+static int mx6q_dcd_table[] = {
+ 0x020e0798, 0x000C0000,
+ 0x020e0758, 0x00000000,
+ 0x020e0588, 0x00000030,
+ 0x020e0594, 0x00000030,
+ 0x020e056c, 0x00000030,
+ 0x020e0578, 0x00000030,
+ 0x020e074c, 0x00000030,
+ 0x020e057c, 0x00000030,
+ 0x020e058c, 0x00000000,
+ 0x020e059c, 0x00000030,
+ 0x020e05a0, 0x00000030,
+ 0x020e078c, 0x00000030,
+ 0x020e0750, 0x00020000,
+ 0x020e05a8, 0x00000030,
+ 0x020e05b0, 0x00000030,
+ 0x020e0524, 0x00000030,
+ 0x020e051c, 0x00000030,
+ 0x020e0518, 0x00000030,
+ 0x020e050c, 0x00000030,
+ 0x020e05b8, 0x00000030,
+ 0x020e05c0, 0x00000030,
+ 0x020e0774, 0x00020000,
+ 0x020e0784, 0x00000030,
+ 0x020e0788, 0x00000030,
+ 0x020e0794, 0x00000030,
+ 0x020e079c, 0x00000030,
+ 0x020e07a0, 0x00000030,
+ 0x020e07a4, 0x00000030,
+ 0x020e07a8, 0x00000030,
+ 0x020e0748, 0x00000030,
+ 0x020e05ac, 0x00000030,
+ 0x020e05b4, 0x00000030,
+ 0x020e0528, 0x00000030,
+ 0x020e0520, 0x00000030,
+ 0x020e0514, 0x00000030,
+ 0x020e0510, 0x00000030,
+ 0x020e05bc, 0x00000030,
+ 0x020e05c4, 0x00000030,
+ 0x021b0800, 0xa1390003,
+ 0x021b080c, 0x001F001F,
+ 0x021b0810, 0x001F001F,
+ 0x021b480c, 0x001F001F,
+ 0x021b4810, 0x001F001F,
+ 0x021b083c, 0x43270338,
+ 0x021b0840, 0x03200314,
+ 0x021b483c, 0x431A032F,
+ 0x021b4840, 0x03200263,
+ 0x021b0848, 0x4B434748,
+ 0x021b4848, 0x4445404C,
+ 0x021b0850, 0x38444542,
+ 0x021b4850, 0x4935493A,
+ 0x021b081c, 0x33333333,
+ 0x021b0820, 0x33333333,
+ 0x021b0824, 0x33333333,
+ 0x021b0828, 0x33333333,
+ 0x021b481c, 0x33333333,
+ 0x021b4820, 0x33333333,
+ 0x021b4824, 0x33333333,
+ 0x021b4828, 0x33333333,
+ 0x021b08b8, 0x00000800,
+ 0x021b48b8, 0x00000800,
+ 0x021b0004, 0x00020036,
+ 0x021b0008, 0x09444040,
+ 0x021b000c, 0x555A7975,
+ 0x021b0010, 0xFF538F64,
+ 0x021b0014, 0x01FF00DB,
+ 0x021b0018, 0x00001740,
+ 0x021b001c, 0x00008000,
+ 0x021b002c, 0x000026d2,
+ 0x021b0030, 0x005A1023,
+ 0x021b0040, 0x00000027,
+ 0x021b0000, 0x831A0000,
+ 0x021b001c, 0x04088032,
+ 0x021b001c, 0x00008033,
+ 0x021b001c, 0x00048031,
+ 0x021b001c, 0x09408030,
+ 0x021b001c, 0x04008040,
+ 0x021b0020, 0x00005800,
+ 0x021b0818, 0x00011117,
+ 0x021b4818, 0x00011117,
+ 0x021b0004, 0x00025576,
+ 0x021b0404, 0x00011006,
+ 0x021b001c, 0x00000000,
+};
+
+static int mx6qp_dcd_table[] = {
+ 0x020e0798, 0x000c0000,
+ 0x020e0758, 0x00000000,
+ 0x020e0588, 0x00000030,
+ 0x020e0594, 0x00000030,
+ 0x020e056c, 0x00000030,
+ 0x020e0578, 0x00000030,
+ 0x020e074c, 0x00000030,
+ 0x020e057c, 0x00000030,
+ 0x020e058c, 0x00000000,
+ 0x020e059c, 0x00000030,
+ 0x020e05a0, 0x00000030,
+ 0x020e078c, 0x00000030,
+ 0x020e0750, 0x00020000,
+ 0x020e05a8, 0x00000030,
+ 0x020e05b0, 0x00000030,
+ 0x020e0524, 0x00000030,
+ 0x020e051c, 0x00000030,
+ 0x020e0518, 0x00000030,
+ 0x020e050c, 0x00000030,
+ 0x020e05b8, 0x00000030,
+ 0x020e05c0, 0x00000030,
+ 0x020e0774, 0x00020000,
+ 0x020e0784, 0x00000030,
+ 0x020e0788, 0x00000030,
+ 0x020e0794, 0x00000030,
+ 0x020e079c, 0x00000030,
+ 0x020e07a0, 0x00000030,
+ 0x020e07a4, 0x00000030,
+ 0x020e07a8, 0x00000030,
+ 0x020e0748, 0x00000030,
+ 0x020e05ac, 0x00000030,
+ 0x020e05b4, 0x00000030,
+ 0x020e0528, 0x00000030,
+ 0x020e0520, 0x00000030,
+ 0x020e0514, 0x00000030,
+ 0x020e0510, 0x00000030,
+ 0x020e05bc, 0x00000030,
+ 0x020e05c4, 0x00000030,
+ 0x021b0800, 0xa1390003,
+ 0x021b080c, 0x001b001e,
+ 0x021b0810, 0x002e0029,
+ 0x021b480c, 0x001b002a,
+ 0x021b4810, 0x0019002c,
+ 0x021b083c, 0x43240334,
+ 0x021b0840, 0x0324031a,
+ 0x021b483c, 0x43340344,
+ 0x021b4840, 0x03280276,
+ 0x021b0848, 0x44383A3E,
+ 0x021b4848, 0x3C3C3846,
+ 0x021b0850, 0x2e303230,
+ 0x021b4850, 0x38283E34,
+ 0x021b081c, 0x33333333,
+ 0x021b0820, 0x33333333,
+ 0x021b0824, 0x33333333,
+ 0x021b0828, 0x33333333,
+ 0x021b481c, 0x33333333,
+ 0x021b4820, 0x33333333,
+ 0x021b4824, 0x33333333,
+ 0x021b4828, 0x33333333,
+ 0x021b08c0, 0x24912249,
+ 0x021b48c0, 0x24914289,
+ 0x021b08b8, 0x00000800,
+ 0x021b48b8, 0x00000800,
+ 0x021b0004, 0x00020036,
+ 0x021b0008, 0x24444040,
+ 0x021b000c, 0x555A7955,
+ 0x021b0010, 0xFF320F64,
+ 0x021b0014, 0x01ff00db,
+ 0x021b0018, 0x00001740,
+ 0x021b001c, 0x00008000,
+ 0x021b002c, 0x000026d2,
+ 0x021b0030, 0x005A1023,
+ 0x021b0040, 0x00000027,
+ 0x021b0400, 0x14420000,
+ 0x021b0000, 0x831A0000,
+ 0x021b0890, 0x00400C58,
+ 0x00bb0008, 0x00000000,
+ 0x00bb000c, 0x2891E41A,
+ 0x00bb0038, 0x00000564,
+ 0x00bb0014, 0x00000040,
+ 0x00bb0028, 0x00000020,
+ 0x00bb002c, 0x00000020,
+ 0x021b001c, 0x04088032,
+ 0x021b001c, 0x00008033,
+ 0x021b001c, 0x00048031,
+ 0x021b001c, 0x09408030,
+ 0x021b001c, 0x04008040,
+ 0x021b0020, 0x00005800,
+ 0x021b0818, 0x00011117,
+ 0x021b4818, 0x00011117,
+ 0x021b0004, 0x00025576,
+ 0x021b0404, 0x00011006,
+ 0x021b001c, 0x00000000,
+};
+
+static void ddr_init(int *table, int size)
{
- struct mx6_ddr_sysinfo sysinfo = {
- /* width of data bus:0=16,1=32,2=64 */
- .dsize = 2,
- /* config for full 4GB range so that get_mem_size() works */
- .cs_density = 32, /* 32Gb per CS */
- /* single chip select */
- .ncs = 1,
- .cs1_mirror = 0,
- .rtt_wr = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Wr = RZQ/4 */
- .rtt_nom = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Nom = RZQ/4 */
- .walat = 1, /* Write additional latency */
- .ralat = 5, /* Read additional latency */
- .mif3_mode = 3, /* Command prediction working mode */
- .bi_on = 1, /* Bank interleaving enabled */
- .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 */
- };
+ int i;
- if (is_mx6dqp()) {
- mx6dq_dram_iocfg(64, &mx6dqp_ddr_ioregs, &mx6_grp_ioregs);
- mx6_dram_cfg(&sysinfo, &mx6dqp_mmcd_calib, &mem_ddr);
- } else {
- mx6dq_dram_iocfg(64, &mx6_ddr_ioregs, &mx6_grp_ioregs);
- mx6_dram_cfg(&sysinfo, &mx6_mmcd_calib, &mem_ddr);
- }
+ for (i = 0; i < size / 2 ; i++)
+ writel(table[2 * i + 1], table[2 * i]);
+}
+
+static void spl_dram_init(void)
+{
+ if (is_mx6dq())
+ ddr_init(mx6q_dcd_table, ARRAY_SIZE(mx6q_dcd_table));
+ else if (is_mx6dqp())
+ ddr_init(mx6qp_dcd_table, ARRAY_SIZE(mx6qp_dcd_table));
}
void board_init_f(ulong dummy)
{
+ /* DDR initialization */
+ spl_dram_init();
+
/* setup AIPS and disable watchdog */
arch_cpu_init();
@@ -884,9 +930,6 @@ void board_init_f(ulong dummy)
/* UART clocks enabled and gd valid - init serial console */
preloader_console_init();
- /* DDR initialization */
- spl_dram_init();
-
/* Clear the BSS. */
memset(__bss_start, 0, __bss_end - __bss_start);
--
2.7.4
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