driver/ddr/fsl: Add support for multiple DDR clocks

Controller number is passed for function calls to support individual
DDR clock, depending on SoC implementation. It is backward compatible
with exising platforms. Multiple clocks have been verifyed on LS2085A
emulator.

Signed-off-by: York Sun <yorksun@freescale.com>

1 files changed, 16 insertions, 11 deletions

diff --git a/drivers/ddr/fsl/lc_common_dimm_params.c b/drivers/ddr/fsl/lc_common_dimm_params.c
index 73db444615..b295344c4d 100644
--- a/drivers/ddr/fsl/lc_common_dimm_params.c
+++ b/drivers/ddr/fsl/lc_common_dimm_params.c
@@ -13,7 +13,8 @@
 
 #if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
 static unsigned int
-compute_cas_latency(const dimm_params_t *dimm_params,
+compute_cas_latency(const unsigned int ctrl_num,
+		    const dimm_params_t *dimm_params,
 		    common_timing_params_t *outpdimm,
 		    unsigned int number_of_dimms)
 {
@@ -22,7 +23,7 @@ compute_cas_latency(const dimm_params_t *dimm_params,
 	unsigned int caslat_actual;
 	unsigned int retry = 16;
 	unsigned int tmp;
-	const unsigned int mclk_ps = get_memory_clk_period_ps();
+	const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
 #ifdef CONFIG_SYS_FSL_DDR3
 	const unsigned int taamax = 20000;
 #else
@@ -72,12 +73,13 @@ compute_cas_latency(const dimm_params_t *dimm_params,
 }
 #else	/* for DDR1 and DDR2 */
 static unsigned int
-compute_cas_latency(const dimm_params_t *dimm_params,
+compute_cas_latency(const unsigned int ctrl_num,
+		    const dimm_params_t *dimm_params,
 		    common_timing_params_t *outpdimm,
 		    unsigned int number_of_dimms)
 {
 	int i;
-	const unsigned int mclk_ps = get_memory_clk_period_ps();
+	const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
 	unsigned int lowest_good_caslat;
 	unsigned int not_ok;
 	unsigned int temp1, temp2;
@@ -212,7 +214,8 @@ compute_cas_latency(const dimm_params_t *dimm_params,
  * by dimm_params.
  */
 unsigned int
-compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
+compute_lowest_common_dimm_parameters(const unsigned int ctrl_num,
+				      const dimm_params_t *dimm_params,
 				      common_timing_params_t *outpdimm,
 				      const unsigned int number_of_dimms)
 {
@@ -442,7 +445,8 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
 		printf("ERROR: Mix different RDIMM detected!\n");
 
 	/* calculate cas latency for all DDR types */
-	if (compute_cas_latency(dimm_params, outpdimm, number_of_dimms))
+	if (compute_cas_latency(ctrl_num, dimm_params,
+				outpdimm, number_of_dimms))
 		return 1;
 
 	/* Determine if all DIMMs ECC capable. */
@@ -518,11 +522,12 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
 
 #if defined(CONFIG_SYS_FSL_DDR2)
 	if ((outpdimm->lowest_common_spd_caslat < 4) &&
-	    (picos_to_mclk(trcd_ps) > outpdimm->lowest_common_spd_caslat)) {
-		additive_latency = picos_to_mclk(trcd_ps) -
+	    (picos_to_mclk(ctrl_num, trcd_ps) >
+	     outpdimm->lowest_common_spd_caslat)) {
+		additive_latency = picos_to_mclk(ctrl_num, trcd_ps) -
 				   outpdimm->lowest_common_spd_caslat;
-		if (mclk_to_picos(additive_latency) > trcd_ps) {
-			additive_latency = picos_to_mclk(trcd_ps);
+		if (mclk_to_picos(ctrl_num, additive_latency) > trcd_ps) {
+			additive_latency = picos_to_mclk(ctrl_num, trcd_ps);
 			debug("setting additive_latency to %u because it was "
 				" greater than tRCD_ps\n", additive_latency);
 		}
@@ -534,7 +539,7 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
 	 *
 	 * AL <= tRCD(min)
 	 */
-	if (mclk_to_picos(additive_latency) > trcd_ps) {
+	if (mclk_to_picos(ctrl_num, additive_latency) > trcd_ps) {
 		printf("Error: invalid additive latency exceeds tRCD(min).\n");
 		return 1;
 	}