2 * Freescale Lite5200 board support
4 * Written by: Grant Likely <grant.likely@secretlab.ca>
6 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
7 * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
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.
18 #include <linux/init.h>
19 #include <linux/pci.h>
21 #include <linux/of_address.h>
22 #include <linux/root_dev.h>
23 #include <linux/initrd.h>
26 #include <asm/machdep.h>
28 #include <asm/mpc52xx.h>
30 /* ************************************************************************
32 * Setup the architecture
36 /* mpc5200 device tree match tables */
37 static struct of_device_id mpc5200_cdm_ids
[] __initdata
= {
38 { .compatible
= "fsl,mpc5200-cdm", },
39 { .compatible
= "mpc5200-cdm", },
43 static struct of_device_id mpc5200_gpio_ids
[] __initdata
= {
44 { .compatible
= "fsl,mpc5200-gpio", },
45 { .compatible
= "mpc5200-gpio", },
50 * Fix clock configuration.
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
57 lite5200_fix_clock_config(void)
59 struct device_node
*np
;
60 struct mpc52xx_cdm __iomem
*cdm
;
62 np
= of_find_matching_node(NULL
, mpc5200_cdm_ids
);
63 cdm
= of_iomap(np
, 0);
66 printk(KERN_ERR
"%s() failed; expect abnormal behaviour\n",
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);
77 out_be16(&cdm
->fd_counters
, 0x5555);
84 * Fix setting of port_config register.
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
91 lite5200_fix_port_config(void)
93 struct device_node
*np
;
94 struct mpc52xx_gpio __iomem
*gpio
;
97 np
= of_find_matching_node(NULL
, mpc5200_gpio_ids
);
98 gpio
= of_iomap(np
, 0);
101 printk(KERN_ERR
"%s() failed. expect abnormal behavior\n",
106 /* Set port config */
107 port_config
= in_be32(&gpio
->port_config
);
109 port_config
&= ~0x00800000; /* 48Mhz internal, pin is GPIO */
111 port_config
&= ~0x00007000; /* USB port : Differential mode */
112 port_config
|= 0x00001000; /* USB 1 only */
114 port_config
&= ~0x03000000; /* ATA CS is on csb_4/5 */
115 port_config
|= 0x01000000;
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
);
126 static void lite5200_suspend_prepare(void __iomem
*mbar
)
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
);
133 * power down usb port
134 * this needs to be called before of-ohci suspend code
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);
144 static void lite5200_resume_finish(void __iomem
*mbar
)
146 /* USB Rh status: LPSC = 1 - turn on power */
147 out_be32(mbar
+ 0x1050, 0x00010000);
151 static void __init
lite5200_setup_arch(void)
154 ppc_md
.progress("lite5200_setup_arch()", 0);
156 /* Map important registers from the internal memory map */
157 mpc52xx_map_common_devices();
159 /* Some mpc5200 & mpc5200b related configuration */
160 mpc5200_setup_xlb_arbiter();
162 /* Fix things that firmware should have done. */
163 lite5200_fix_clock_config();
164 lite5200_fix_port_config();
167 mpc52xx_suspend
.board_suspend_prepare
= lite5200_suspend_prepare
;
168 mpc52xx_suspend
.board_resume_finish
= lite5200_resume_finish
;
175 static const char * const board
[] __initconst
= {
182 * Called very early, MMU is off, device-tree isn't unflattened
184 static int __init
lite5200_probe(void)
186 return of_flat_dt_match(of_get_flat_dt_root(), board
);
189 define_machine(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
,