1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Freescale Lite5200 board support
4 *
5 * Written by: Grant Likely <grant.likely@secretlab.ca>
6 *
7 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
8 * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
9 *
10 * Description:
11 */
12
13#undef DEBUG
14
15#include <linux/init.h>
16#include <linux/pci.h>
17#include <linux/of.h>
18#include <linux/of_address.h>
19#include <linux/root_dev.h>
20#include <linux/initrd.h>
21#include <asm/time.h>
22#include <asm/io.h>
23#include <asm/machdep.h>
24#include <asm/mpc52xx.h>
25
26/* ************************************************************************
27 *
28 * Setup the architecture
29 *
30 */
31
32/* mpc5200 device tree match tables */
33static const struct of_device_id mpc5200_cdm_ids[] __initconst = {
34	{ .compatible = "fsl,mpc5200-cdm", },
35	{ .compatible = "mpc5200-cdm", },
36	{}
37};
38
39static const struct of_device_id mpc5200_gpio_ids[] __initconst = {
40	{ .compatible = "fsl,mpc5200-gpio", },
41	{ .compatible = "mpc5200-gpio", },
42	{}
43};
44
45/*
46 * Fix clock configuration.
47 *
48 * Firmware is supposed to be responsible for this.  If you are creating a
49 * new board port, do *NOT* duplicate this code.  Fix your boot firmware
50 * to set it correctly in the first place
51 */
52static void __init
53lite5200_fix_clock_config(void)
54{
55	struct device_node *np;
56	struct mpc52xx_cdm  __iomem *cdm;
57	/* Map zones */
58	np = of_find_matching_node(NULL, mpc5200_cdm_ids);
59	cdm = of_iomap(np, 0);
60	of_node_put(np);
61	if (!cdm) {
62		printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
63		       __func__);
64		return;
65	}
66
67	/* Use internal 48 Mhz */
68	out_8(&cdm->ext_48mhz_en, 0x00);
69	out_8(&cdm->fd_enable, 0x01);
70	if (in_be32(&cdm->rstcfg) & 0x40)	/* Assumes 33Mhz clock */
71		out_be16(&cdm->fd_counters, 0x0001);
72	else
73		out_be16(&cdm->fd_counters, 0x5555);
74
75	/* Unmap the regs */
76	iounmap(cdm);
77}
78
79/*
80 * Fix setting of port_config register.
81 *
82 * Firmware is supposed to be responsible for this.  If you are creating a
83 * new board port, do *NOT* duplicate this code.  Fix your boot firmware
84 * to set it correctly in the first place
85 */
86static void __init
87lite5200_fix_port_config(void)
88{
89	struct device_node *np;
90	struct mpc52xx_gpio __iomem *gpio;
91	u32 port_config;
92
93	np = of_find_matching_node(NULL, mpc5200_gpio_ids);
94	gpio = of_iomap(np, 0);
95	of_node_put(np);
96	if (!gpio) {
97		printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
98		       __func__);
99		return;
100	}
101
102	/* Set port config */
103	port_config = in_be32(&gpio->port_config);
104
105	port_config &= ~0x00800000;	/* 48Mhz internal, pin is GPIO	*/
106
107	port_config &= ~0x00007000;	/* USB port : Differential mode	*/
108	port_config |=  0x00001000;	/*            USB 1 only	*/
109
110	port_config &= ~0x03000000;	/* ATA CS is on csb_4/5		*/
111	port_config |=  0x01000000;
112
113	pr_debug("port_config: old:%x new:%x\n",
114	         in_be32(&gpio->port_config), port_config);
115	out_be32(&gpio->port_config, port_config);
116
117	/* Unmap zone */
118	iounmap(gpio);
119}
120
121#ifdef CONFIG_PM
122static void lite5200_suspend_prepare(void __iomem *mbar)
123{
124	u8 pin = 1;	/* GPIO_WKUP_1 (GPIO_PSC2_4) */
125	u8 level = 0;	/* wakeup on low level */
126	mpc52xx_set_wakeup_gpio(pin, level);
127
128	/*
129	 * power down usb port
130	 * this needs to be called before of-ohci suspend code
131	 */
132
133	/* set ports to "power switched" and "powered at the same time"
134	 * USB Rh descriptor A: NPS = 0, PSM = 0 */
135	out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
136	/* USB Rh status: LPS = 1 - turn off power */
137	out_be32(mbar + 0x1050, 0x00000001);
138}
139
140static void lite5200_resume_finish(void __iomem *mbar)
141{
142	/* USB Rh status: LPSC = 1 - turn on power */
143	out_be32(mbar + 0x1050, 0x00010000);
144}
145#endif
146
147static void __init lite5200_setup_arch(void)
148{
149	if (ppc_md.progress)
150		ppc_md.progress("lite5200_setup_arch()", 0);
151
152	/* Map important registers from the internal memory map */
153	mpc52xx_map_common_devices();
154
155	/* Some mpc5200 & mpc5200b related configuration */
156	mpc5200_setup_xlb_arbiter();
157
158	/* Fix things that firmware should have done. */
159	lite5200_fix_clock_config();
160	lite5200_fix_port_config();
161
162#ifdef CONFIG_PM
163	mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
164	mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
165	lite5200_pm_init();
166#endif
167}
168
169static const char * const board[] __initconst = {
170	"fsl,lite5200",
171	"fsl,lite5200b",
172	NULL,
173};
174
175define_machine(lite5200) {
176	.name 		= "lite5200",
177	.compatibles	= board,
178	.setup_arch 	= lite5200_setup_arch,
179	.discover_phbs	= mpc52xx_setup_pci,
180	.init		= mpc52xx_declare_of_platform_devices,
181	.init_IRQ 	= mpc52xx_init_irq,
182	.get_irq 	= mpc52xx_get_irq,
183	.restart	= mpc52xx_restart,
184};
185