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

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright 2008-2011 DENX Software Engineering GmbH
  4 * Author: Heiko Schocher <hs@denx.de>
  5 *
  6 * Description:
  7 * Keymile 83xx platform specific routines.
  8 */
  9
 10#include <linux/stddef.h>
 11#include <linux/kernel.h>
 12#include <linux/init.h>
 13#include <linux/errno.h>
 14#include <linux/reboot.h>
 15#include <linux/pci.h>
 16#include <linux/kdev_t.h>
 17#include <linux/major.h>
 18#include <linux/console.h>
 19#include <linux/delay.h>
 20#include <linux/seq_file.h>
 21#include <linux/root_dev.h>
 22#include <linux/initrd.h>
 23#include <linux/of_platform.h>
 24#include <linux/of_device.h>
 25
 26#include <linux/atomic.h>
 27#include <linux/time.h>
 28#include <linux/io.h>
 29#include <asm/machdep.h>
 30#include <asm/ipic.h>
 31#include <asm/irq.h>
 32#include <asm/prom.h>
 33#include <asm/udbg.h>
 34#include <sysdev/fsl_soc.h>
 35#include <sysdev/fsl_pci.h>
 36#include <soc/fsl/qe/qe.h>
 37
 38#include "mpc83xx.h"
 39
 40#define SVR_REV(svr)    (((svr) >>  0) & 0xFFFF) /* Revision field */
 41
 42static void quirk_mpc8360e_qe_enet10(void)
 43{
 44	/*
 45	 * handle mpc8360E Erratum QE_ENET10:
 46	 * RGMII AC values do not meet the specification
 47	 */
 48	uint svid = mfspr(SPRN_SVR);
 49	struct	device_node *np_par;
 50	struct	resource res;
 51	void	__iomem *base;
 52	int	ret;
 53
 54	np_par = of_find_node_by_name(NULL, "par_io");
 55	if (np_par == NULL) {
 56		pr_warn("%s couldn't find par_io node\n", __func__);
 57		return;
 58	}
 59	/* Map Parallel I/O ports registers */
 60	ret = of_address_to_resource(np_par, 0, &res);
 61	if (ret) {
 62		pr_warn("%s couldn't map par_io registers\n", __func__);
 63		goto out;
 64	}
 65
 66	base = ioremap(res.start, resource_size(&res));
 67	if (!base)
 68		goto out;
 69
 70	/*
 71	 * set output delay adjustments to default values according
 72	 * table 5 in Errata Rev. 5, 9/2011:
 73	 *
 74	 * write 0b01 to UCC1 bits 18:19
 75	 * write 0b01 to UCC2 option 1 bits 4:5
 76	 * write 0b01 to UCC2 option 2 bits 16:17
 77	 */
 78	clrsetbits_be32((base + 0xa8), 0x0c00f000, 0x04005000);
 79
 80	/*
 81	 * set output delay adjustments to default values according
 82	 * table 3-13 in Reference Manual Rev.3 05/2010:
 83	 *
 84	 * write 0b01 to UCC2 option 2 bits 16:17
 85	 * write 0b0101 to UCC1 bits 20:23
 86	 * write 0b0101 to UCC2 option 1 bits 24:27
 87	 */
 88	clrsetbits_be32((base + 0xac), 0x0000cff0, 0x00004550);
 89
 90	if (SVR_REV(svid) == 0x0021) {
 91		/*
 92		 * UCC2 option 1: write 0b1010 to bits 24:27
 93		 * at address IMMRBAR+0x14AC
 94		 */
 95		clrsetbits_be32((base + 0xac), 0x000000f0, 0x000000a0);
 96	} else if (SVR_REV(svid) == 0x0020) {
 97		/*
 98		 * UCC1: write 0b11 to bits 18:19
 99		 * at address IMMRBAR+0x14A8
100		 */
101		setbits32((base + 0xa8), 0x00003000);
102
103		/*
104		 * UCC2 option 1: write 0b11 to bits 4:5
105		 * at address IMMRBAR+0x14A8
106		 */
107		setbits32((base + 0xa8), 0x0c000000);
108
109		/*
110		 * UCC2 option 2: write 0b11 to bits 16:17
111		 * at address IMMRBAR+0x14AC
112		 */
113		setbits32((base + 0xac), 0x0000c000);
114	}
115	iounmap(base);
116out:
117	of_node_put(np_par);
118}
119
120/* ************************************************************************
121 *
122 * Setup the architecture
123 *
124 */
125static void __init mpc83xx_km_setup_arch(void)
126{
127#ifdef CONFIG_QUICC_ENGINE
128	struct device_node *np;
129#endif
130
131	mpc83xx_setup_arch();
132
133#ifdef CONFIG_QUICC_ENGINE
134	np = of_find_node_by_name(NULL, "par_io");
135	if (np != NULL) {
136		par_io_init(np);
137		of_node_put(np);
138
139		for_each_node_by_name(np, "spi")
140			par_io_of_config(np);
141
142		for_each_node_by_name(np, "ucc")
143			par_io_of_config(np);
144
145		/* Only apply this quirk when par_io is available */
146		np = of_find_compatible_node(NULL, "network", "ucc_geth");
147		if (np != NULL) {
148			quirk_mpc8360e_qe_enet10();
149			of_node_put(np);
150		}
151	}
152#endif	/* CONFIG_QUICC_ENGINE */
153}
154
155machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices);
156
157/* list of the supported boards */
158static char *board[] __initdata = {
159	"Keymile,KMETER1",
160	"Keymile,kmpbec8321",
161	NULL
162};
163
164/*
165 * Called very early, MMU is off, device-tree isn't unflattened
166 */
167static int __init mpc83xx_km_probe(void)
168{
169	int i = 0;
170
171	while (board[i]) {
172		if (of_machine_is_compatible(board[i]))
173			break;
174		i++;
175	}
176	return (board[i] != NULL);
177}
178
179define_machine(mpc83xx_km) {
180	.name		= "mpc83xx-km-platform",
181	.probe		= mpc83xx_km_probe,
182	.setup_arch	= mpc83xx_km_setup_arch,
183	.init_IRQ	= mpc83xx_ipic_init_IRQ,
184	.get_irq	= ipic_get_irq,
185	.restart	= mpc83xx_restart,
186	.time_init	= mpc83xx_time_init,
187	.calibrate_decr	= generic_calibrate_decr,
188	.progress	= udbg_progress,
189};