linux_dsm_epyc7002/arch/powerpc/platforms/83xx/km83xx.c

/*
 * Copyright 2008-2011 DENX Software Engineering GmbH
 * Author: Heiko Schocher <hs@denx.de>
 *
 * Description:
 * Keymile 83xx platform specific routines.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/stddef.h>
#include <linux/kernel.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/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include <asm/qe.h>
#include <asm/qe_ic.h>

#include "mpc83xx.h"

#define SVR_REV(svr)    (((svr) >>  0) & 0xFFFF) /* Revision field */
/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc83xx_km_setup_arch(void)
{
#ifdef CONFIG_QUICC_ENGINE
	struct device_node *np;
#endif

	if (ppc_md.progress)
		ppc_md.progress("kmpbec83xx_setup_arch()", 0);

	mpc83xx_setup_pci();

#ifdef CONFIG_QUICC_ENGINE
	qe_reset();

	np = of_find_node_by_name(NULL, "par_io");
	if (np != NULL) {
		par_io_init(np);
		of_node_put(np);

		for_each_node_by_name(np, "spi")
			par_io_of_config(np);

		for_each_node_by_name(np, "ucc")
			par_io_of_config(np);
	}

	np = of_find_compatible_node(NULL, "network", "ucc_geth");
	if (np != NULL) {
		/*
		 * handle mpc8360E Erratum QE_ENET10:
		 * RGMII AC values do not meet the specification
		 */
		uint svid = mfspr(SPRN_SVR);
		struct	device_node *np_par;
		struct	resource res;
		void	__iomem *base;
		int	ret;

		np_par = of_find_node_by_name(NULL, "par_io");
		if (np_par == NULL) {
			printk(KERN_WARNING "%s couldn;t find par_io node\n",
				__func__);
			return;
		}
		/* Map Parallel I/O ports registers */
		ret = of_address_to_resource(np_par, 0, &res);
		if (ret) {
			printk(KERN_WARNING "%s couldn;t map par_io registers\n",
				__func__);
			return;
		}

		base = ioremap(res.start, res.end - res.start + 1);

		/*
		 * set output delay adjustments to default values according
		 * table 5 in Errata Rev. 5, 9/2011:
		 *
		 * write 0b01 to UCC1 bits 18:19
		 * write 0b01 to UCC2 option 1 bits 4:5
		 * write 0b01 to UCC2 option 2 bits 16:17
		 */
		clrsetbits_be32((base + 0xa8), 0x0c00f000, 0x04005000);

		/*
		 * set output delay adjustments to default values according
		 * table 3-13 in Reference Manual Rev.3 05/2010:
		 *
		 * write 0b01 to UCC2 option 2 bits 16:17
		 * write 0b0101 to UCC1 bits 20:23
		 * write 0b0101 to UCC2 option 1 bits 24:27
		 */
		clrsetbits_be32((base + 0xac), 0x0000cff0, 0x00004550);

		if (SVR_REV(svid) == 0x0021) {
			/*
			 * UCC2 option 1: write 0b1010 to bits 24:27
			 * at address IMMRBAR+0x14AC
			 */
			clrsetbits_be32((base + 0xac), 0x000000f0, 0x000000a0);
		} else if (SVR_REV(svid) == 0x0020) {
			/*
			 * UCC1: write 0b11 to bits 18:19
			 * at address IMMRBAR+0x14A8
			 */
			setbits32((base + 0xa8), 0x00003000);

			/*
			 * UCC2 option 1: write 0b11 to bits 4:5
			 * at address IMMRBAR+0x14A8
			 */
			setbits32((base + 0xa8), 0x0c000000);

			/*
			 * UCC2 option 2: write 0b11 to bits 16:17
			 * at address IMMRBAR+0x14AC
			 */
			setbits32((base + 0xac), 0x0000c000);
		}
		iounmap(base);
		of_node_put(np_par);
		of_node_put(np);
	}
#endif	/* CONFIG_QUICC_ENGINE */
}

machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices);

/* list of the supported boards */
static char *board[] __initdata = {
	"Keymile,KMETER1",
	"Keymile,kmpbec8321",
	NULL
};

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init mpc83xx_km_probe(void)
{
	unsigned long node = of_get_flat_dt_root();
	int i = 0;

	while (board[i]) {
		if (of_flat_dt_is_compatible(node, board[i]))
			break;
		i++;
	}
	return (board[i] != NULL);
}

define_machine(mpc83xx_km) {
	.name		= "mpc83xx-km-platform",
	.probe		= mpc83xx_km_probe,
	.setup_arch	= mpc83xx_km_setup_arch,
	.init_IRQ	= mpc83xx_ipic_and_qe_init_IRQ,
	.get_irq	= ipic_get_irq,
	.restart	= mpc83xx_restart,
	.time_init	= mpc83xx_time_init,
	.calibrate_decr	= generic_calibrate_decr,
	.progress	= udbg_progress,
};