am33xx: Make config_cmd_ctrl / config_ddr_data take const structs

Rework the EMIF4/DDR code slightly to setup the structs that
config_cmd_ctrl and config_ddr_data take to be setup at compile time and
mark them as const.  This lets us simplify the calling path slightly as
well as making it easier to deal with DDR3.

Signed-off-by: Tom Rini <trini@ti.com>

arch/arm/cpu/armv7/am33xx/ddr.c

@@ -85,7 +85,7 @@ int config_ddr_phy(struct ddr_phy_control *p)
 /**
  * Configure DDR CMD control registers
  */
-int config_cmd_ctrl(struct cmd_control *cmd)
+int config_cmd_ctrl(const struct cmd_control *cmd)
 {
 	writel(cmd->cmd0csratio, &ddr_reg[0]->cm0csratio);
 	writel(cmd->cmd0csforce, &ddr_reg[0]->cm0csforce);
@@ -111,7 +111,7 @@ int config_cmd_ctrl(struct cmd_control *cmd)
 /**
  * Configure DDR DATA registers
  */
-int config_ddr_data(int macrono, struct ddr_data *data)
+int config_ddr_data(int macrono, const struct ddr_data *data)
 {
 	writel(data->datardsratio0, &ddr_reg[macrono]->dt0rdsratio0);
 	writel(data->datardsratio1, &ddr_reg[macrono]->dt0rdsratio1);

arch/arm/cpu/armv7/am33xx/emif4.c

@@ -47,58 +47,47 @@ void dram_init_banksize(void)
 
 
 #ifdef CONFIG_SPL_BUILD
-static void data_macro_config(int dataMacroNum)
-{
-	struct ddr_data data;
-
-	data.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20)
-				|(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0));
-	data.datardsratio1 = DDR2_RD_DQS>>2;
-	data.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20)
-				|(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0));
-	data.datawdsratio1 = DDR2_WR_DQS>>2;
-	data.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20)
-				|(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0));
-	data.datawiratio1 = DDR2_PHY_WRLVL>>2;
-	data.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20)
-				|(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0));
-	data.datagiratio1 = DDR2_PHY_GATELVL>>2;
-	data.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20)
-				|(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0));
-	data.datafwsratio1 = DDR2_PHY_FIFO_WE>>2;
-	data.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20)
-				|(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0));
-	data.datawrsratio1 = DDR2_PHY_WR_DATA>>2;
-	data.datadldiff0 = PHY_DLL_LOCK_DIFF;
-
-	config_ddr_data(dataMacroNum, &data);
-}
-
-static void cmd_macro_config(void)
-{
-	struct cmd_control cmd;
-
-	cmd.cmd0csratio = DDR2_RATIO;
-	cmd.cmd0csforce = CMD_FORCE;
-	cmd.cmd0csdelay = CMD_DELAY;
-	cmd.cmd0dldiff = DDR2_DLL_LOCK_DIFF;
-	cmd.cmd0iclkout = DDR2_INVERT_CLKOUT;
-
-	cmd.cmd1csratio = DDR2_RATIO;
-	cmd.cmd1csforce = CMD_FORCE;
-	cmd.cmd1csdelay = CMD_DELAY;
-	cmd.cmd1dldiff = DDR2_DLL_LOCK_DIFF;
-	cmd.cmd1iclkout = DDR2_INVERT_CLKOUT;
-
-	cmd.cmd2csratio = DDR2_RATIO;
-	cmd.cmd2csforce = CMD_FORCE;
-	cmd.cmd2csdelay = CMD_DELAY;
-	cmd.cmd2dldiff = DDR2_DLL_LOCK_DIFF;
-	cmd.cmd2iclkout = DDR2_INVERT_CLKOUT;
-
-	config_cmd_ctrl(&cmd);
-
-}
+static const struct ddr_data ddr2_data = {
+	.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20)
+				|(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0)),
+	.datardsratio1 = DDR2_RD_DQS>>2,
+	.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20)
+				|(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0)),
+	.datawdsratio1 = DDR2_WR_DQS>>2,
+	.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20)
+				|(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0)),
+	.datawiratio1 = DDR2_PHY_WRLVL>>2,
+	.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20)
+				|(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0)),
+	.datagiratio1 = DDR2_PHY_GATELVL>>2,
+	.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20)
+				|(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0)),
+	.datafwsratio1 = DDR2_PHY_FIFO_WE>>2,
+	.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20)
+				|(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0)),
+	.datawrsratio1 = DDR2_PHY_WR_DATA>>2,
+	.datadldiff0 = PHY_DLL_LOCK_DIFF,
+};
+
+static const struct cmd_control ddr2_cmd_ctrl_data = {
+	.cmd0csratio = DDR2_RATIO,
+	.cmd0csforce = CMD_FORCE,
+	.cmd0csdelay = CMD_DELAY,
+	.cmd0dldiff = DDR2_DLL_LOCK_DIFF,
+	.cmd0iclkout = DDR2_INVERT_CLKOUT,
+
+	.cmd1csratio = DDR2_RATIO,
+	.cmd1csforce = CMD_FORCE,
+	.cmd1csdelay = CMD_DELAY,
+	.cmd1dldiff = DDR2_DLL_LOCK_DIFF,
+	.cmd1iclkout = DDR2_INVERT_CLKOUT,
+
+	.cmd2csratio = DDR2_RATIO,
+	.cmd2csforce = CMD_FORCE,
+	.cmd2csdelay = CMD_DELAY,
+	.cmd2dldiff = DDR2_DLL_LOCK_DIFF,
+	.cmd2iclkout = DDR2_INVERT_CLKOUT,
+};
 
 static void config_vtp(void)
 {
@@ -156,18 +145,16 @@ static void config_emif_ddr2(void)
 
 void config_ddr(void)
 {
-	int data_macro_0 = 0;
-	int data_macro_1 = 1;
 	struct ddr_ioctrl ioctrl;
 
 	enable_emif_clocks();
 
 	config_vtp();
 
-	cmd_macro_config();
+	config_cmd_ctrl(&ddr2_cmd_ctrl_data);
 
-	data_macro_config(data_macro_0);
-	data_macro_config(data_macro_1);
+	config_ddr_data(0, &ddr2_data);
+	config_ddr_data(1, &ddr2_data);
 
 	writel(PHY_RANK0_DELAY, &ddrregs->dt0rdelays0);
 	writel(PHY_RANK0_DELAY, &ddrregs->dt1rdelays0);

arch/arm/include/asm/arch-am33xx/ddr_defs.h

@@ -190,12 +190,12 @@ struct ddr_data {
 /**
  * Configure DDR CMD control registers
  */
-int config_cmd_ctrl(struct cmd_control *cmd);
+int config_cmd_ctrl(const struct cmd_control *cmd);
 
 /**
  * Configure DDR DATA registers
  */
-int config_ddr_data(int data_macrono, struct ddr_data *data);
+int config_ddr_data(int data_macrono, const struct ddr_data *data);
 
 /**
  * This structure represents the DDR io control on AM33XX devices.