ppc4xx: Remove 4xx NAND booting support

As ppc4xx currently only supports the deprecated nand_spl infrastructure
and nobody seems to have time / resources to port this over to the newer
SPL infrastructure, lets remove NAND booting completely.

This should not affect the "normal", non NAND-booting ppc4xx platforms
that are currently supported.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Tirumala Marri <tmarri@apm.com>
Cc: Matthias Fuchs <matthias.fuchs@esd.eu>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>
Tested-by: Matthias Fuchs <matthias.fuchs@esd.eu>

1 files changed, 0 insertions, 76 deletions

diff --git a/nand_spl/board/amcc/bamboo/sdram.c b/nand_spl/board/amcc/bamboo/sdram.c
deleted file mode 100644
index df0dfc1a0d..0000000000
--- a/nand_spl/board/amcc/bamboo/sdram.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * (C) Copyright 2007
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <asm/ppc4xx.h>
-#include <asm/processor.h>
-#include <asm/io.h>
-
-static void wait_init_complete(void)
-{
-	u32 val;
-
-	do {
-		mfsdram(SDRAM0_MCSTS, val);
-	} while (!(val & 0x80000000));
-}
-
-/*
- * phys_size_t initdram(int board_type)
- *
- * As the name already indicates, this function is called very early
- * from start.S and configures the SDRAM with fixed values. This is needed,
- * since the 440EP has no internal SRAM and the 4kB NAND_SPL loader has
- * not enough free space to implement the complete I2C SPD DDR autodetection
- * routines. Therefore the Bamboo only supports the onboard 64MBytes of SDRAM
- * when booting from NAND flash.
- *
- * Note:
- * As found out by Eugene O'Brien <eugene.obrien@advantechamt.com>, the fixed
- * DDR setup has problems (U-Boot crashes randomly upon TFTP), when the DIMM
- * modules are still plugged in. So it is recommended to remove the DIMM
- * modules while using the NAND booting code with the fixed SDRAM setup!
- */
-phys_size_t initdram(int board_type)
-{
-	/*
-	 * Soft-reset SDRAM controller.
-	 */
-	mtsdr(SDR0_SRST, SDR0_SRST_DMC);
-	mtsdr(SDR0_SRST, 0x00000000);
-
-	/*
-	 * Disable memory controller.
-	 */
-	mtsdram(SDRAM0_CFG0, 0x00000000);
-
-	/*
-	 * Setup some default
-	 */
-	mtsdram(SDRAM0_UABBA, 0x00000000); /* ubba=0 (default)		*/
-	mtsdram(SDRAM0_SLIO, 0x00000000);	/* rdre=0 wrre=0 rarw=0		*/
-	mtsdram(SDRAM0_DEVOPT, 0x00000000); /* dll=0 ds=0 (normal)		*/
-	mtsdram(SDRAM0_WDDCTR, 0x00000000); /* wrcp=0 dcd=0		*/
-	mtsdram(SDRAM0_CLKTR, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0	*/
-
-	/*
-	 * Following for CAS Latency = 2.5 @ 133 MHz PLB
-	 */
-	mtsdram(SDRAM0_B0CR, 0x00082001);
-	mtsdram(SDRAM0_TR0, 0x41094012);
-	mtsdram(SDRAM0_TR1, 0x8080083d);	/* SS=T2 SL=STAGE 3 CD=1 CT=0x00*/
-	mtsdram(SDRAM0_RTR, 0x04100000);	/* Interval 7.8µs @ 133MHz PLB	*/
-	mtsdram(SDRAM0_CFG1, 0x00000000);	/* Self-refresh exit, disable PM*/
-
-	/*
-	 * Enable the controller, then wait for DCEN to complete
-	 */
-	mtsdram(SDRAM0_CFG0, 0x80000000); /* DCEN=1, PMUD=0*/
-	wait_init_complete();
-
-	return CONFIG_SYS_MBYTES_SDRAM << 20;
-}