l4t: t210b01: set real dram rate by default

Since Arachne Register Cell (ARC) is now final and stable,
automatically set rated DRAM frequency for T210B01 by default.
1866 MHz for old ones and 2133 MHz for newer ones.

Setting anything from 1600000 and lower will disable that.

bootloader/l4t/l4t.c

@@ -32,8 +32,8 @@
  * 0: Base.
  * 1: SDMMC1 LA programming for SDMMC1 UHS DDR200.
  */
-#define L4T_LOADER_API_REV 1
+#define L4T_LOADER_API_REV 3
-#define L4T_FIRMWARE_REV   0x32524556 // REV2.
+#define L4T_FIRMWARE_REV   0x33524556 // REV3.
 
 #ifdef DEBUG_UART_PORT
  #include <soc/uart.h>
@@ -114,8 +114,6 @@
 #define BPMPFW_B01_DTB_EMC_TBL_START(idx)             (BPMPFW_B01_DTB_EMC_TBL_OFF + BPMPFW_B01_DTB_EMC_TBL_SZ * (idx))
 #define BPMPFW_B01_DTB_EMC_TBL_SET_VAL(idx, off, val) (*(u32 *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + (off)) = (val))
 #define BPMPFW_B01_DTB_EMC_TBL_SET_FREQ(idx, freq)    (*(u32 *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + BPMPFW_B01_DTB_EMC_FREQ_VAL) = (freq))
-#define BPMPFW_B01_DTB_EMC_TBL_SCC_OFFSET(idx)        ((void *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + BPMPFW_B01_DTB_EMC_SCC_OFF))
-#define BPMPFW_B01_DTB_EMC_TBL_SET_PLLM_DIVN(idx, n)  (*(u32 *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + BPMPFW_B01_DTB_EMC_PLLM_DIVN_VAL) = (n))
 #define BPMPFW_B01_DTB_EMC_TBL_SET_NAME(idx, name)    (strcpy((char *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + BPMPFW_B01_DTB_EMC_NAME_VAL), (name)))
 #define BPMPFW_B01_DTB_EMC_TBL_ENABLE(idx)            (*(char *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + BPMPFW_B01_DTB_EMC_ENABLE_OFF) = 'n')
 #define BPMPFW_B01_DTB_EMC_TBL_OFFSET(idx)            ((void *)(BPMPFW_B01_DTB_EMC_TBL_START(idx) + BPMPFW_B01_DTB_EMC_VALUES_OFF))
@@ -244,24 +242,6 @@ typedef struct _plat_params_from_bl2 {
 	u64 flags;                    // Platform flags.
 } plat_params_from_bl2_t;
 
-typedef struct _pll_spread_spectrum_t210b01_t {
-	u32 ss_cfg;
-	u32 ss_ctrl1;
-	u32 ss_ctrl2;
-	u32 ss2_cfg;
-	u32 ss2_ctrl1;
-	u32 ss2_ctrl2;
-	u32 divm;
-	u32 divn;
-	u32 pdivp;
-} pll_spread_spectrum_t210b01_t;
-
-typedef struct _pll_ssc_t210b01_t {
-	u32 ss_ctrl1;
-	u32 ss_ctrl2;
-	u32 divn;
-} pll_ssc_t210b01_t;
-
 typedef struct _l4t_fw_t
 {
 	u32   addr;
@@ -289,19 +269,6 @@ typedef struct _l4t_ctxt_t
 #define DRAM_VDDQ_OC_MAX_VOLTAGE  650
 #define DRAM_T210B01_TBL_MAX_FREQ 1600000
 
-// JEDEC frequency table.
-static const u32 ram_jd_t210b01[] = {
-	1866000,
-	2133000,
-};
-
-#define DRAM_T210B01_SSC_PARAMS 2
-
-static const pll_ssc_t210b01_t pll_jd_ssc_t210b01[DRAM_T210B01_SSC_PARAMS] = {
-	{ 0x300FB3A,    0x30300, 48 },
-	{ 0x180F89D, 0x10070180, 55 },
-};
-
 //! TODO: Update on dram config changes.
 static const u8 mtc_table_idx_t210b01[] = {
 /*	00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34 */
@@ -788,7 +755,7 @@ static void _l4t_bpmpfw_b01_config(l4t_ctxt_t *ctxt)
 {
 	char *ram_oc_txt  = ctxt->ram_oc_txt;
 	u32   ram_oc_freq = ctxt->ram_oc_freq;
-	u32   ram_oc_divn  = 0;
+	u32   ram_id      = fuse_read_dramid(true);
 
 	// Set default parameters.
 	*(u32 *)BPMPFW_B01_DTB_ADDR = 0;
@@ -806,66 +773,47 @@ static void _l4t_bpmpfw_b01_config(l4t_ctxt_t *ctxt)
 #endif
 
 	// Set and copy MTC tables.
-	u32 mtc_idx = mtc_table_idx_t210b01[fuse_read_dramid(true)];
+	u32 mtc_idx = mtc_table_idx_t210b01[ram_id];
 	for (u32 i = 0; i < 3; i++)
 	{
 		minerva_sdmmc_la_program(BPMPFW_B01_MTC_TABLE_OFFSET(mtc_idx, i), true);
 		memcpy(BPMPFW_B01_DTB_EMC_TBL_OFFSET(i), BPMPFW_B01_MTC_TABLE_OFFSET(mtc_idx, i), BPMPFW_B01_MTC_FREQ_TABLE_SIZE);
 	}
 
+	// Always use Arachne Register Cell (ARC) for setting rated frequencies if no ram_oc is defined.
+	if (!ram_oc_freq)
+	{
+		if (ram_id >= LPDDR4X_IOWA_4GB_SAMSUNG_K4U6E3S4AM_MGCJ &&
+			ram_id <= LPDDR4X_HOAG_4GB_MICRON_MT53E512M32D2NP_046_WTE)
+		{
+			ram_oc_txt  = "1866000";
+			ram_oc_freq = 1866000;
+		}
+		else
+		{
+			ram_oc_txt  = "2133000";
+			ram_oc_freq = 2133000;
+		}
+	}
+
+	// A frequency of lower or equal with stock max will skip ARC.
 	if (ram_oc_freq > DRAM_T210B01_TBL_MAX_FREQ)
 	{
 		// Final table.
 		const u32 tbl_idx = BPMPFW_B01_DTB_EMC_ENTRIES - 1;
 
-		// Set Overclock.
-		for (u32 i = 0; i < ARRAY_SIZE(ram_jd_t210b01); i++)
-		{
-			// Normalize the check at 38.4 MHz window.
-			if ((ram_jd_t210b01[i] - 19200) < ram_oc_freq &&
-				(ram_jd_t210b01[i] + 19200) > ram_oc_freq)
-			{
-				// Set divider.
-				ram_oc_divn = i + 1;
-
-				break;
-			}
-		}
-
-		if (!ram_oc_divn)
-			ram_oc_divn = ram_oc_freq / 38400;
-
 		// Set DRAM voltage.
 		if (ctxt->ram_oc_vdd2)
 			max7762x_regulator_set_voltage(REGULATOR_SD1,  ctxt->ram_oc_vdd2 * 1000);
 		if (ctxt->ram_oc_vddq)
 			max7762x_regulator_set_voltage(REGULATOR_RAM0, ctxt->ram_oc_vddq * 1000);
 
-		// Copy table and set parameters.
+		// Copy table and prep it for Arachne.
 		memcpy(BPMPFW_B01_DTB_EMC_TBL_OFFSET(tbl_idx), BPMPFW_B01_MTC_TABLE_OFFSET(mtc_idx, 2), BPMPFW_B01_MTC_FREQ_TABLE_SIZE);
 
 		BPMPFW_B01_DTB_EMC_TBL_SET_NAME(tbl_idx, ram_oc_txt);
 		BPMPFW_B01_DTB_EMC_TBL_SET_FREQ(tbl_idx, ram_oc_freq);
 
-		pll_spread_spectrum_t210b01_t *ssc = BPMPFW_B01_DTB_EMC_TBL_SCC_OFFSET(tbl_idx);
-
-		if (ram_oc_divn <= DRAM_T210B01_SSC_PARAMS)
-		{
-			// Standard frequency.
-			const pll_ssc_t210b01_t *ssc_cfg = &pll_jd_ssc_t210b01[ram_oc_divn - 1];
-
-			ssc->ss_ctrl1  = ssc_cfg->ss_ctrl1;
-			ssc->ss_ctrl2  = ssc_cfg->ss_ctrl2;
-			ssc->ss2_ctrl1 = ssc_cfg->ss_ctrl1;
-			ssc->ss2_ctrl2 = ssc_cfg->ss_ctrl2;
-			ssc->divn      = ssc_cfg->divn;
-		}
-		else
-		{
-			// Non standard frequency.
-			ssc->divn = ram_oc_divn;
-		}
-
 		// Enable table.
 		BPMPFW_B01_DTB_EMC_TBL_ENABLE(tbl_idx);