Hi Marek,
On 8/29/2014 12:30 PM, Marek Vasut wrote:
+static struct mx6_mmdc_calibration novena_mmdc_calib = {
+ /* write leveling calibration determine */
+ .p0_mpwldectrl0 = 0x00420048,
+ .p0_mpwldectrl1 = 0x006f0059,
+ .p1_mpwldectrl0 = 0x005a0104,
+ .p1_mpwldectrl1 = 0x01070113,
+ /* Read DQS Gating calibration */
+ .p0_mpdgctrl0 = 0x437c040b,
+ .p0_mpdgctrl1 = 0x0413040e,
+ .p1_mpdgctrl0 = 0x444f0446,
+ .p1_mpdgctrl1 = 0x044d0422,
+ /* Read Calibration: DQS delay relative to DQ read access */
+ .p0_mprddlctl = 0x4c424249,
+ .p1_mprddlctl = 0x4e48414f,
+ /* Write Calibration: DQ/DM delay relative to DQS write access */
+ .p0_mpwrdlctl = 0x42414641,
+ .p1_mpwrdlctl = 0x46374b43,
+};
I think these values should be result of MMDC calibration. If they're
hardcoded, some SO-DIMM modules will work, some won't.
+static struct mx6_ddr_sysinfo novena_ddr_info = {
+ /* 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, /* RTT_Wr = RZQ/4 */
+ .rtt_nom = 2, /* RTT_Nom = RZQ/2 */
+ .walat = 3, /* Write additional latency */
+ .ralat = 7, /* 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) */
+};
ncs is hard-coded to 1, while there are available SO-DIMMS on the market
which have 2 ranks. Novena is supposed to handle memory modules up to
4GiB, which means that there's a high chance to have 2-rank module
installed.
+
+static struct mx6_ddr3_cfg elpida_4gib_1600 = {
+ .mem_speed = 1600,
+ .density = 4,
+ .width = 64,
+ .banks = 8,
+ .rowaddr = 16,
+ .coladdr = 10,
+ .pagesz = 2,
+ .trcd = 1300,
+ .trcmin = 4900,
+ .trasmin = 3590,
+};
Again, this should be read from SPD mem, not hard-coded.
And finally - thank you so much for putting the efforts to add support
for the Novena open-source board!
Kind regards,
Nikolay
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