1 /*
2 * Freescale Lite5200 board support
3 *
4 * Written by: Grant Likely <grant.likely@secretlab.ca>
5 *
6 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
7 * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
8 *
9 * Description:
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 */
15
16 #undef DEBUG
17
18 #include <linux/init.h>
19 #include <linux/pci.h>
20 #include <linux/of.h>
21 #include <linux/of_address.h>
22 #include <linux/root_dev.h>
23 #include <linux/initrd.h>
24 #include <asm/time.h>
25 #include <asm/io.h>
26 #include <asm/machdep.h>
27 #include <asm/prom.h>
28 #include <asm/mpc52xx.h>
29
30 /* ************************************************************************
31 *
32 * Setup the architecture
33 *
34 */
35
36 /* mpc5200 device tree match tables */
37 static const struct of_device_id mpc5200_cdm_ids[] __initconst = {
38 { .compatible = "fsl,mpc5200-cdm", },
39 { .compatible = "mpc5200-cdm", },
40 {}
41 };
42
43 static const struct of_device_id mpc5200_gpio_ids[] __initconst = {
44 { .compatible = "fsl,mpc5200-gpio", },
45 { .compatible = "mpc5200-gpio", },
46 {}
47 };
48
49 /*
50 * Fix clock configuration.
51 *
52 * Firmware is supposed to be responsible for this. If you are creating a
53 * new board port, do *NOT* duplicate this code. Fix your boot firmware
54 * to set it correctly in the first place
55 */
56 static void __init
lite5200_fix_clock_config(void)57 lite5200_fix_clock_config(void)
58 {
59 struct device_node *np;
60 struct mpc52xx_cdm __iomem *cdm;
61 /* Map zones */
62 np = of_find_matching_node(NULL, mpc5200_cdm_ids);
63 cdm = of_iomap(np, 0);
64 of_node_put(np);
65 if (!cdm) {
66 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
67 __func__);
68 return;
69 }
70
71 /* Use internal 48 Mhz */
72 out_8(&cdm->ext_48mhz_en, 0x00);
73 out_8(&cdm->fd_enable, 0x01);
74 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
75 out_be16(&cdm->fd_counters, 0x0001);
76 else
77 out_be16(&cdm->fd_counters, 0x5555);
78
79 /* Unmap the regs */
80 iounmap(cdm);
81 }
82
83 /*
84 * Fix setting of port_config register.
85 *
86 * Firmware is supposed to be responsible for this. If you are creating a
87 * new board port, do *NOT* duplicate this code. Fix your boot firmware
88 * to set it correctly in the first place
89 */
90 static void __init
lite5200_fix_port_config(void)91 lite5200_fix_port_config(void)
92 {
93 struct device_node *np;
94 struct mpc52xx_gpio __iomem *gpio;
95 u32 port_config;
96
97 np = of_find_matching_node(NULL, mpc5200_gpio_ids);
98 gpio = of_iomap(np, 0);
99 of_node_put(np);
100 if (!gpio) {
101 printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
102 __func__);
103 return;
104 }
105
106 /* Set port config */
107 port_config = in_be32(&gpio->port_config);
108
109 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
110
111 port_config &= ~0x00007000; /* USB port : Differential mode */
112 port_config |= 0x00001000; /* USB 1 only */
113
114 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
115 port_config |= 0x01000000;
116
117 pr_debug("port_config: old:%x new:%x\n",
118 in_be32(&gpio->port_config), port_config);
119 out_be32(&gpio->port_config, port_config);
120
121 /* Unmap zone */
122 iounmap(gpio);
123 }
124
125 #ifdef CONFIG_PM
lite5200_suspend_prepare(void __iomem * mbar)126 static void lite5200_suspend_prepare(void __iomem *mbar)
127 {
128 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */
129 u8 level = 0; /* wakeup on low level */
130 mpc52xx_set_wakeup_gpio(pin, level);
131
132 /*
133 * power down usb port
134 * this needs to be called before of-ohci suspend code
135 */
136
137 /* set ports to "power switched" and "powered at the same time"
138 * USB Rh descriptor A: NPS = 0, PSM = 0 */
139 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
140 /* USB Rh status: LPS = 1 - turn off power */
141 out_be32(mbar + 0x1050, 0x00000001);
142 }
143
lite5200_resume_finish(void __iomem * mbar)144 static void lite5200_resume_finish(void __iomem *mbar)
145 {
146 /* USB Rh status: LPSC = 1 - turn on power */
147 out_be32(mbar + 0x1050, 0x00010000);
148 }
149 #endif
150
lite5200_setup_arch(void)151 static void __init lite5200_setup_arch(void)
152 {
153 if (ppc_md.progress)
154 ppc_md.progress("lite5200_setup_arch()", 0);
155
156 /* Map important registers from the internal memory map */
157 mpc52xx_map_common_devices();
158
159 /* Some mpc5200 & mpc5200b related configuration */
160 mpc5200_setup_xlb_arbiter();
161
162 /* Fix things that firmware should have done. */
163 lite5200_fix_clock_config();
164 lite5200_fix_port_config();
165
166 #ifdef CONFIG_PM
167 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
168 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
169 lite5200_pm_init();
170 #endif
171
172 mpc52xx_setup_pci();
173 }
174
175 static const char * const board[] __initconst = {
176 "fsl,lite5200",
177 "fsl,lite5200b",
178 NULL,
179 };
180
181 /*
182 * Called very early, MMU is off, device-tree isn't unflattened
183 */
lite5200_probe(void)184 static int __init lite5200_probe(void)
185 {
186 return of_flat_dt_match(of_get_flat_dt_root(), board);
187 }
188
define_machine(lite5200)189 define_machine(lite5200) {
190 .name = "lite5200",
191 .probe = lite5200_probe,
192 .setup_arch = lite5200_setup_arch,
193 .init = mpc52xx_declare_of_platform_devices,
194 .init_IRQ = mpc52xx_init_irq,
195 .get_irq = mpc52xx_get_irq,
196 .restart = mpc52xx_restart,
197 .calibrate_decr = generic_calibrate_decr,
198 };
199