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/prom.h>
25 #include <asm/mpc52xx.h>
26
27 /* ************************************************************************
28 *
29 * Setup the architecture
30 *
31 */
32
33 /* mpc5200 device tree match tables */
34 static const struct of_device_id mpc5200_cdm_ids[] __initconst = {
35 { .compatible = "fsl,mpc5200-cdm", },
36 { .compatible = "mpc5200-cdm", },
37 {}
38 };
39
40 static const struct of_device_id mpc5200_gpio_ids[] __initconst = {
41 { .compatible = "fsl,mpc5200-gpio", },
42 { .compatible = "mpc5200-gpio", },
43 {}
44 };
45
46 /*
47 * Fix clock configuration.
48 *
49 * Firmware is supposed to be responsible for this. If you are creating a
50 * new board port, do *NOT* duplicate this code. Fix your boot firmware
51 * to set it correctly in the first place
52 */
53 static void __init
lite5200_fix_clock_config(void)54 lite5200_fix_clock_config(void)
55 {
56 struct device_node *np;
57 struct mpc52xx_cdm __iomem *cdm;
58 /* Map zones */
59 np = of_find_matching_node(NULL, mpc5200_cdm_ids);
60 cdm = of_iomap(np, 0);
61 of_node_put(np);
62 if (!cdm) {
63 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
64 __func__);
65 return;
66 }
67
68 /* Use internal 48 Mhz */
69 out_8(&cdm->ext_48mhz_en, 0x00);
70 out_8(&cdm->fd_enable, 0x01);
71 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
72 out_be16(&cdm->fd_counters, 0x0001);
73 else
74 out_be16(&cdm->fd_counters, 0x5555);
75
76 /* Unmap the regs */
77 iounmap(cdm);
78 }
79
80 /*
81 * Fix setting of port_config register.
82 *
83 * Firmware is supposed to be responsible for this. If you are creating a
84 * new board port, do *NOT* duplicate this code. Fix your boot firmware
85 * to set it correctly in the first place
86 */
87 static void __init
lite5200_fix_port_config(void)88 lite5200_fix_port_config(void)
89 {
90 struct device_node *np;
91 struct mpc52xx_gpio __iomem *gpio;
92 u32 port_config;
93
94 np = of_find_matching_node(NULL, mpc5200_gpio_ids);
95 gpio = of_iomap(np, 0);
96 of_node_put(np);
97 if (!gpio) {
98 printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
99 __func__);
100 return;
101 }
102
103 /* Set port config */
104 port_config = in_be32(&gpio->port_config);
105
106 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
107
108 port_config &= ~0x00007000; /* USB port : Differential mode */
109 port_config |= 0x00001000; /* USB 1 only */
110
111 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
112 port_config |= 0x01000000;
113
114 pr_debug("port_config: old:%x new:%x\n",
115 in_be32(&gpio->port_config), port_config);
116 out_be32(&gpio->port_config, port_config);
117
118 /* Unmap zone */
119 iounmap(gpio);
120 }
121
122 #ifdef CONFIG_PM
lite5200_suspend_prepare(void __iomem * mbar)123 static void lite5200_suspend_prepare(void __iomem *mbar)
124 {
125 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */
126 u8 level = 0; /* wakeup on low level */
127 mpc52xx_set_wakeup_gpio(pin, level);
128
129 /*
130 * power down usb port
131 * this needs to be called before of-ohci suspend code
132 */
133
134 /* set ports to "power switched" and "powered at the same time"
135 * USB Rh descriptor A: NPS = 0, PSM = 0 */
136 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
137 /* USB Rh status: LPS = 1 - turn off power */
138 out_be32(mbar + 0x1050, 0x00000001);
139 }
140
lite5200_resume_finish(void __iomem * mbar)141 static void lite5200_resume_finish(void __iomem *mbar)
142 {
143 /* USB Rh status: LPSC = 1 - turn on power */
144 out_be32(mbar + 0x1050, 0x00010000);
145 }
146 #endif
147
lite5200_setup_arch(void)148 static void __init lite5200_setup_arch(void)
149 {
150 if (ppc_md.progress)
151 ppc_md.progress("lite5200_setup_arch()", 0);
152
153 /* Map important registers from the internal memory map */
154 mpc52xx_map_common_devices();
155
156 /* Some mpc5200 & mpc5200b related configuration */
157 mpc5200_setup_xlb_arbiter();
158
159 /* Fix things that firmware should have done. */
160 lite5200_fix_clock_config();
161 lite5200_fix_port_config();
162
163 #ifdef CONFIG_PM
164 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
165 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
166 lite5200_pm_init();
167 #endif
168
169 mpc52xx_setup_pci();
170 }
171
172 static const char * const board[] __initconst = {
173 "fsl,lite5200",
174 "fsl,lite5200b",
175 NULL,
176 };
177
178 /*
179 * Called very early, MMU is off, device-tree isn't unflattened
180 */
lite5200_probe(void)181 static int __init lite5200_probe(void)
182 {
183 return of_device_compatible_match(of_root, board);
184 }
185
define_machine(lite5200)186 define_machine(lite5200) {
187 .name = "lite5200",
188 .probe = lite5200_probe,
189 .setup_arch = lite5200_setup_arch,
190 .init = mpc52xx_declare_of_platform_devices,
191 .init_IRQ = mpc52xx_init_irq,
192 .get_irq = mpc52xx_get_irq,
193 .restart = mpc52xx_restart,
194 .calibrate_decr = generic_calibrate_decr,
195 };
196
