arm: socfpga: move gen5 SDR driver to DM

To clean up reset handling for socfpga gen5, port the DDR driver to DM
using UCLASS_RAM and implement proper reset handling.

This gets us rid of one ad-hoc call to socfpga_per_reset().

The gen5 driver is implemented in 2 distinct files. One of it (containing
the calibration training) is not touched much and is kept at using
hard coded addresses since the code grows even more otherwise.

SPL is changed from calling hard into the DDR driver code to just
probing UCLASS_RESET and UCLASS_RAM. It is happy after finding a RAM
driver after that.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>

3 files changed, 11 insertions, 26 deletions

diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index ec1966480f..51a6a51b53 100644
--- a/arch/arm/dts/socfpga.dtsi
+++ b/arch/arm/dts/socfpga.dtsi
@@ -791,9 +791,9 @@
 			reg = <0xfffec000 0x100>;
 		};
 
-		sdr: sdr@ffc25000 {
+		sdr: sdr@ffc20000 {
 			compatible = "altr,sdr-ctl", "syscon";
-			reg = <0xffc25000 0x1000>;
+			reg = <0xffc20000 0x6000>;
 			resets = <&rst SDR_RESET>;
 		};
 
diff --git a/arch/arm/mach-socfpga/include/mach/sdram_gen5.h b/arch/arm/mach-socfpga/include/mach/sdram_gen5.h
index a238d5d17f..c41208591a 100644
--- a/arch/arm/mach-socfpga/include/mach/sdram_gen5.h
+++ b/arch/arm/mach-socfpga/include/mach/sdram_gen5.h
@@ -7,10 +7,6 @@
 
 #ifndef __ASSEMBLY__
 
-unsigned long sdram_calculate_size(void);
-int sdram_mmr_init_full(unsigned int sdr_phy_reg);
-int sdram_calibration_full(void);
-
 const struct socfpga_sdram_config *socfpga_get_sdram_config(void);
 
 void socfpga_get_seq_ac_init(const u32 **init, unsigned int *nelem);
diff --git a/arch/arm/mach-socfpga/spl_gen5.c b/arch/arm/mach-socfpga/spl_gen5.c
index 142b60f887..c5399bb697 100644
--- a/arch/arm/mach-socfpga/spl_gen5.c
+++ b/arch/arm/mach-socfpga/spl_gen5.c
@@ -21,6 +21,7 @@
 #include <debug_uart.h>
 #include <fdtdec.h>
 #include <watchdog.h>
+#include <dm/uclass.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -123,9 +124,9 @@ static void socfpga_pl310_clear(void)
 void board_init_f(ulong dummy)
 {
 	const struct cm_config *cm_default_cfg = cm_get_default_config();
-	unsigned long sdram_size;
 	unsigned long reg;
 	int ret;
+	struct udevice *dev;
 
 	/*
 	 * First C code to run. Clear fake OCRAM ECC first as SBE
@@ -156,7 +157,6 @@ void board_init_f(ulong dummy)
 		socfpga_bridges_reset(1);
 	}
 
-	socfpga_per_reset(SOCFPGA_RESET(SDR), 0);
 	socfpga_per_reset(SOCFPGA_RESET(UART0), 0);
 	socfpga_per_reset(SOCFPGA_RESET(OSC1TIMER0), 0);
 
@@ -200,27 +200,16 @@ void board_init_f(ulong dummy)
 		hang();
 	}
 
+	ret = uclass_get_device(UCLASS_RESET, 0, &dev);
+	if (ret)
+		debug("Reset init failed: %d\n", ret);
+
 	/* enable console uart printing */
 	preloader_console_init();
 
-	if (sdram_mmr_init_full(0xffffffff) != 0) {
-		puts("SDRAM init failed.\n");
-		hang();
-	}
-
-	debug("SDRAM: Calibrating PHY\n");
-	/* SDRAM calibration */
-	if (sdram_calibration_full() == 0) {
-		puts("SDRAM calibration failed.\n");
-		hang();
-	}
-
-	sdram_size = sdram_calculate_size();
-	debug("SDRAM: %ld MiB\n", sdram_size >> 20);
-
-	/* Sanity check ensure correct SDRAM size specified */
-	if (get_ram_size(0, sdram_size) != sdram_size) {
-		puts("SDRAM size check failed!\n");
+	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (ret) {
+		debug("DRAM init failed: %d\n", ret);
 		hang();
 	}