[linux-2.6-block.git] / arch / powerpc / boot / cuboot-52xx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Old U-boot compatibility for MPC5200
 *
 * Author: Grant Likely <grant.likely@secretlab.ca>
 *
 * Copyright (c) 2007 Secret Lab Technologies Ltd.
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 */

#include "ops.h"
#include "stdio.h"
#include "io.h"
#include "cuboot.h"

#define TARGET_PPC_MPC52xx
#include "ppcboot.h"

static bd_t bd;

static void platform_fixups(void)
{
	void *soc, *reg;
	int div;
	u32 sysfreq;


	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
	dt_fixup_mac_addresses(bd.bi_enetaddr);
	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);

	/* Unfortunately, the specific model number is encoded in the
	 * soc node name in existing dts files -- once that is fixed,
	 * this can do a simple path lookup.
	 */
	soc = find_node_by_devtype(NULL, "soc");
	if (!soc)
		soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
	if (!soc)
		soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
	if (soc) {
		setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
			sizeof(bd.bi_ipbfreq));

		if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
			return;
		div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
		sysfreq = bd.bi_busfreq * div;
		setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
	}
}

void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
                   unsigned long r6, unsigned long r7)
{
	CUBOOT_INIT();
	fdt_init(_dtb_start);
	serial_console_init();
	platform_ops.fixups = platform_fixups;
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
85498ae8 GL	2	/*
	3	* Old U-boot compatibility for MPC5200
	4	*
	5	* Author: Grant Likely <grant.likely@secretlab.ca>
	6	*
	7	* Copyright (c) 2007 Secret Lab Technologies Ltd.
	8	* Copyright (c) 2007 Freescale Semiconductor, Inc.
85498ae8 GL	9	*/
	10
	11	#include "ops.h"
	12	#include "stdio.h"
	13	#include "io.h"
	14	#include "cuboot.h"
	15
	16	#define TARGET_PPC_MPC52xx
	17	#include "ppcboot.h"
	18
	19	static bd_t bd;
	20
	21	static void platform_fixups(void)
	22	{
	23	void soc, reg;
	24	int div;
	25	u32 sysfreq;
	26
	27
	28	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
	29	dt_fixup_mac_addresses(bd.bi_enetaddr);
	30	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
	31
	32	/* Unfortunately, the specific model number is encoded in the
	33	* soc node name in existing dts files -- once that is fixed,
	34	* this can do a simple path lookup.
	35	*/
	36	soc = find_node_by_devtype(NULL, "soc");
40847993 GL	37	if (!soc)
	38	soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
	39	if (!soc)
	40	soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
85498ae8 GL	41	if (soc) {
	42	setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
	43	sizeof(bd.bi_ipbfreq));
	44
	45	if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
	46	return;
	47	div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
	48	sysfreq = bd.bi_busfreq * div;
	49	setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
	50	}
	51	}
	52
	53	void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
	54	unsigned long r6, unsigned long r7)
	55	{
	56	CUBOOT_INIT();
2f0dfeaa	57	fdt_init(_dtb_start);
85498ae8 GL	58	serial_console_init();
	59	platform_ops.fixups = platform_fixups;
	60	}