powerpc: drop MPC836x_MDS platform support

This 2006 era Modular Development System (MDS) has, at its core component,
a full length card with a PCI edge.  No case.  Serial and network
connectors were on card, so it could optionally be fitted with plastic
stand-offs and run stand-alone off a power brick.

This is very similar to the MPC834x_MDS removed in the prior commit, but
with this board variant as an evolutionary step.  DDR2 was now an option,
and the card edge was revised down to PCI-32 as PCI-64 never got traction.
But overall the form factor and design goals were unchanged.

Like all the MDS systems, it was meant as a vehicle to get the CPU out
early to hardware OEMs so software and board development could take place
in parallel.

To that end, the BGA CPU was held in place with a mechanical spring loaded
pressure assembly (vs. solder) so that early rev silicon could be replaced
in the field.  Not for COTS deployment!

These were made in limited numbers and availability preference was given
to partners who were planning to make their own boards.

Given that the whole reason for existence was to assist in enabling new
board designs [not happening for 10+ years], and that they weren't
generally available, and that the hardware wasn't really hobbyist friendly
even for retro computing, it makes sense to retire the support for this
particular platform.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
[mpe: Drop stale reference to MPC836x_MDS in arch/powerpc/boot/Makefile]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230220115913.25811-3-paul.gortmaker@windriver.com

arch/powerpc/boot/Makefile

@@ -338,7 +338,6 @@ image-$(CONFIG_MPC832x_MDS)		+= cuImage.mpc832x_mds
 image-$(CONFIG_MPC832x_RDB)		+= cuImage.mpc832x_rdb
 image-$(CONFIG_MPC834x_ITX)		+= cuImage.mpc8349emitx \
 					   cuImage.mpc8349emitxgp
-image-$(CONFIG_MPC836x_MDS)		+= cuImage.mpc836x_mds
 image-$(CONFIG_ASP834x)			+= dtbImage.asp834x-redboot
 
 # Board ports in arch/powerpc/platform/85xx/Kconfig

arch/powerpc/configs/83xx/mpc836x_mds_defconfig

-CONFIG_SYSVIPC=y
-CONFIG_NO_HZ=y
-CONFIG_HIGH_RES_TIMERS=y
-CONFIG_LOG_BUF_SHIFT=14
-CONFIG_BLK_DEV_INITRD=y
-CONFIG_EXPERT=y
-# CONFIG_KALLSYMS is not set
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
-# CONFIG_BLK_DEV_BSG is not set
-CONFIG_PARTITION_ADVANCED=y
-# CONFIG_MSDOS_PARTITION is not set
-# CONFIG_PPC_CHRP is not set
-# CONFIG_PPC_PMAC is not set
-CONFIG_PPC_83xx=y
-CONFIG_MPC836x_MDS=y
-CONFIG_PCI=y
-CONFIG_NET=y
-CONFIG_PACKET=y
-CONFIG_UNIX=y
-CONFIG_INET=y
-CONFIG_IP_MULTICAST=y
-CONFIG_IP_PNP=y
-CONFIG_IP_PNP_DHCP=y
-CONFIG_IP_PNP_BOOTP=y
-CONFIG_SYN_COOKIES=y
-# CONFIG_IPV6 is not set
-# CONFIG_FW_LOADER is not set
-CONFIG_MTD=y
-CONFIG_MTD_CMDLINE_PARTS=y
-CONFIG_MTD_BLOCK=y
-CONFIG_MTD_CFI=y
-CONFIG_MTD_CFI_AMDSTD=y
-CONFIG_MTD_PHYSMAP_OF=y
-CONFIG_BLK_DEV_LOOP=y
-CONFIG_BLK_DEV_RAM=y
-CONFIG_BLK_DEV_RAM_SIZE=32768
-CONFIG_SCSI=y
-CONFIG_NETDEVICES=y
-CONFIG_UCC_GETH=y
-CONFIG_MARVELL_PHY=y
-# CONFIG_INPUT_KEYBOARD is not set
-# CONFIG_INPUT_MOUSE is not set
-# CONFIG_SERIO is not set
-# CONFIG_VT is not set
-CONFIG_SERIAL_8250=y
-CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_HW_RANDOM=y
-CONFIG_I2C=y
-CONFIG_I2C_CHARDEV=y
-CONFIG_I2C_MPC=y
-CONFIG_WATCHDOG=y
-CONFIG_RTC_CLASS=y
-CONFIG_RTC_DRV_DS1374=y
-CONFIG_QUICC_ENGINE=y
-CONFIG_EXT2_FS=y
-CONFIG_EXT4_FS=y
-CONFIG_PROC_KCORE=y
-CONFIG_TMPFS=y
-CONFIG_NFS_FS=y
-CONFIG_NFS_V4=y
-CONFIG_ROOT_NFS=y
-CONFIG_CRYPTO_ECB=m
-CONFIG_CRYPTO_PCBC=m

arch/powerpc/configs/mpc83xx_defconfig

@@ -14,7 +14,6 @@ CONFIG_MPC831x_RDB=y
 CONFIG_MPC832x_MDS=y
 CONFIG_MPC832x_RDB=y
 CONFIG_MPC834x_ITX=y
-CONFIG_MPC836x_MDS=y
 CONFIG_MPC836x_RDK=y
 CONFIG_MPC837x_MDS=y
 CONFIG_MPC837x_RDB=y

arch/powerpc/configs/ppc6xx_defconfig

@@ -47,7 +47,6 @@ CONFIG_MPC831x_RDB=y
 CONFIG_MPC832x_MDS=y
 CONFIG_MPC832x_RDB=y
 CONFIG_MPC834x_ITX=y
-CONFIG_MPC836x_MDS=y
 CONFIG_MPC836x_RDK=y
 CONFIG_MPC837x_MDS=y
 CONFIG_MPC837x_RDB=y

arch/powerpc/platforms/83xx/Kconfig

@@ -49,12 +49,6 @@ config MPC834x_ITX
 	  Be aware that PCI initialization is the bootloader's
 	  responsibility.
 
-config MPC836x_MDS
-	bool "Freescale MPC836x MDS"
-	select DEFAULT_UIMAGE
-	help
-	  This option enables support for the MPC836x MDS Processor Board.
-
 config MPC836x_RDK
 	bool "Freescale/Logic MPC836x RDK"
 	select DEFAULT_UIMAGE

arch/powerpc/platforms/83xx/Makefile

@@ -9,7 +9,6 @@ obj-$(CONFIG_MPC830x_RDB)	+= mpc830x_rdb.o
 obj-$(CONFIG_MPC831x_RDB)	+= mpc831x_rdb.o
 obj-$(CONFIG_MPC832x_RDB)	+= mpc832x_rdb.o
 obj-$(CONFIG_MPC834x_ITX)	+= mpc834x_itx.o
-obj-$(CONFIG_MPC836x_MDS)	+= mpc836x_mds.o
 obj-$(CONFIG_MPC836x_RDK)	+= mpc836x_rdk.o
 obj-$(CONFIG_MPC832x_MDS)	+= mpc832x_mds.o
 obj-$(CONFIG_MPC837x_MDS)	+= mpc837x_mds.o

arch/powerpc/platforms/83xx/mpc836x_mds.c

-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
- *
- * Author: Li Yang <LeoLi@freescale.com>
- *	   Yin Olivia <Hong-hua.Yin@freescale.com>
- *
- * Description:
- * MPC8360E MDS board specific routines.
- *
- * Changelog:
- * Jun 21, 2006	Initial version
- */
-
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/compiler.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/reboot.h>
-#include <linux/pci.h>
-#include <linux/kdev_t.h>
-#include <linux/major.h>
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/seq_file.h>
-#include <linux/root_dev.h>
-#include <linux/initrd.h>
-#include <linux/of_platform.h>
-#include <linux/of_device.h>
-
-#include <linux/atomic.h>
-#include <asm/time.h>
-#include <asm/io.h>
-#include <asm/machdep.h>
-#include <asm/ipic.h>
-#include <asm/irq.h>
-#include <asm/udbg.h>
-#include <sysdev/fsl_soc.h>
-#include <sysdev/fsl_pci.h>
-#include <soc/fsl/qe/qe.h>
-
-#include "mpc83xx.h"
-
-#undef DEBUG
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-/* ************************************************************************
- *
- * Setup the architecture
- *
- */
-static void __init mpc836x_mds_setup_arch(void)
-{
-	struct device_node *np;
-	u8 __iomem *bcsr_regs = NULL;
-
-	mpc83xx_setup_arch();
-
-	/* Map BCSR area */
-	np = of_find_node_by_name(NULL, "bcsr");
-	if (np) {
-		struct resource res;
-
-		of_address_to_resource(np, 0, &res);
-		bcsr_regs = ioremap(res.start, resource_size(&res));
-		of_node_put(np);
-	}
-
-#ifdef CONFIG_QUICC_ENGINE
-	if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
-		par_io_init(np);
-		of_node_put(np);
-
-		for_each_node_by_name(np, "ucc")
-			par_io_of_config(np);
-#ifdef CONFIG_QE_USB
-		/* Must fixup Par IO before QE GPIO chips are registered. */
-		par_io_config_pin(1,  2, 1, 0, 3, 0); /* USBOE  */
-		par_io_config_pin(1,  3, 1, 0, 3, 0); /* USBTP  */
-		par_io_config_pin(1,  8, 1, 0, 1, 0); /* USBTN  */
-		par_io_config_pin(1, 10, 2, 0, 3, 0); /* USBRXD */
-		par_io_config_pin(1,  9, 2, 1, 3, 0); /* USBRP  */
-		par_io_config_pin(1, 11, 2, 1, 3, 0); /* USBRN  */
-		par_io_config_pin(2, 20, 2, 0, 1, 0); /* CLK21  */
-#endif /* CONFIG_QE_USB */
-	}
-
-	if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
-			!= NULL){
-		uint svid;
-
-		/* Reset the Ethernet PHY */
-#define BCSR9_GETHRST 0x20
-		clrbits8(&bcsr_regs[9], BCSR9_GETHRST);
-		udelay(1000);
-		setbits8(&bcsr_regs[9], BCSR9_GETHRST);
-
-		/* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
-		svid = mfspr(SPRN_SVR);
-		if (svid == 0x80480021) {
-			void __iomem *immap;
-
-			immap = ioremap(get_immrbase() + 0x14a8, 8);
-
-			/*
-			 * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
-			 * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
-			 */
-			setbits32(immap, 0x0c003000);
-
-			/*
-			 * IMMR + 0x14AC[20:27] = 10101010
-			 * (data delay for both UCC's)
-			 */
-			clrsetbits_be32(immap + 4, 0xff0, 0xaa0);
-
-			iounmap(immap);
-		}
-
-		iounmap(bcsr_regs);
-		of_node_put(np);
-	}
-#endif				/* CONFIG_QUICC_ENGINE */
-}
-
-machine_device_initcall(mpc836x_mds, mpc83xx_declare_of_platform_devices);
-
-#ifdef CONFIG_QE_USB
-static int __init mpc836x_usb_cfg(void)
-{
-	u8 __iomem *bcsr;
-	struct device_node *np;
-	const char *mode;
-	int ret = 0;
-
-	np = of_find_compatible_node(NULL, NULL, "fsl,mpc8360mds-bcsr");
-	if (!np)
-		return -ENODEV;
-
-	bcsr = of_iomap(np, 0);
-	of_node_put(np);
-	if (!bcsr)
-		return -ENOMEM;
-
-	np = of_find_compatible_node(NULL, NULL, "fsl,mpc8323-qe-usb");
-	if (!np) {
-		ret = -ENODEV;
-		goto err;
-	}
-
-#define BCSR8_TSEC1M_MASK	(0x3 << 6)
-#define BCSR8_TSEC1M_RGMII	(0x0 << 6)
-#define BCSR8_TSEC2M_MASK	(0x3 << 4)
-#define BCSR8_TSEC2M_RGMII	(0x0 << 4)
-	/*
-	 * Default is GMII (2), but we should set it to RGMII (0) if we use
-	 * USB (Eth PHY is in RGMII mode anyway).
-	 */
-	clrsetbits_8(&bcsr[8], BCSR8_TSEC1M_MASK | BCSR8_TSEC2M_MASK,
-			       BCSR8_TSEC1M_RGMII | BCSR8_TSEC2M_RGMII);
-
-#define BCSR13_USBMASK	0x0f
-#define BCSR13_nUSBEN	0x08 /* 1 - Disable, 0 - Enable			*/
-#define BCSR13_USBSPEED	0x04 /* 1 - Full, 0 - Low			*/
-#define BCSR13_USBMODE	0x02 /* 1 - Host, 0 - Function			*/
-#define BCSR13_nUSBVCC	0x01 /* 1 - gets VBUS, 0 - supplies VBUS 	*/
-
-	clrsetbits_8(&bcsr[13], BCSR13_USBMASK, BCSR13_USBSPEED);
-
-	mode = of_get_property(np, "mode", NULL);
-	if (mode && !strcmp(mode, "peripheral")) {
-		setbits8(&bcsr[13], BCSR13_nUSBVCC);
-		qe_usb_clock_set(QE_CLK21, 48000000);
-	} else {
-		setbits8(&bcsr[13], BCSR13_USBMODE);
-	}
-
-	of_node_put(np);
-err:
-	iounmap(bcsr);
-	return ret;
-}
-machine_arch_initcall(mpc836x_mds, mpc836x_usb_cfg);
-#endif /* CONFIG_QE_USB */
-
-define_machine(mpc836x_mds) {
-	.name		= "MPC836x MDS",
-	.compatible	= "MPC836xMDS",
-	.setup_arch	= mpc836x_mds_setup_arch,
-	.discover_phbs  = mpc83xx_setup_pci,
-	.init_IRQ	= mpc83xx_ipic_init_IRQ,
-	.get_irq	= ipic_get_irq,
-	.restart	= mpc83xx_restart,
-	.time_init	= mpc83xx_time_init,
-	.progress	= udbg_progress,
-};