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 (C) Freescale Semicondutor, Inc. 2006. 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/root_dev.h>
22 #include <linux/initrd.h>
25 #include <asm/machdep.h>
27 #include <asm/mpc52xx.h>
29 /* ************************************************************************
31 * Setup the architecture
36 * Fix clock configuration.
38 * Firmware is supposed to be responsible for this. If you are creating a
39 * new board port, do *NOT* duplicate this code. Fix your boot firmware
40 * to set it correctly in the first place
43 lite5200_fix_clock_config(void)
45 struct mpc52xx_cdm __iomem *cdm;
48 cdm = mpc52xx_find_and_map("mpc5200-cdm");
50 printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
55 /* Use internal 48 Mhz */
56 out_8(&cdm->ext_48mhz_en, 0x00);
57 out_8(&cdm->fd_enable, 0x01);
58 if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
59 out_be16(&cdm->fd_counters, 0x0001);
61 out_be16(&cdm->fd_counters, 0x5555);
68 * Fix setting of port_config register.
70 * Firmware is supposed to be responsible for this. If you are creating a
71 * new board port, do *NOT* duplicate this code. Fix your boot firmware
72 * to set it correctly in the first place
75 lite5200_fix_port_config(void)
77 struct mpc52xx_gpio __iomem *gpio;
80 gpio = mpc52xx_find_and_map("mpc5200-gpio");
82 printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
88 port_config = in_be32(&gpio->port_config);
90 port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
92 port_config &= ~0x00007000; /* USB port : Differential mode */
93 port_config |= 0x00001000; /* USB 1 only */
95 port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
96 port_config |= 0x01000000;
98 pr_debug("port_config: old:%x new:%x\n",
99 in_be32(&gpio->port_config), port_config);
100 out_be32(&gpio->port_config, port_config);
107 static void lite5200_suspend_prepare(void __iomem *mbar)
109 u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */
110 u8 level = 0; /* wakeup on low level */
111 mpc52xx_set_wakeup_gpio(pin, level);
114 * power down usb port
115 * this needs to be called before of-ohci suspend code
118 /* set ports to "power switched" and "powered at the same time"
119 * USB Rh descriptor A: NPS = 0, PSM = 0 */
120 out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
121 /* USB Rh status: LPS = 1 - turn off power */
122 out_be32(mbar + 0x1050, 0x00000001);
125 static void lite5200_resume_finish(void __iomem *mbar)
127 /* USB Rh status: LPSC = 1 - turn on power */
128 out_be32(mbar + 0x1050, 0x00010000);
132 static void __init lite5200_setup_arch(void)
135 struct device_node *np;
139 ppc_md.progress("lite5200_setup_arch()", 0);
141 /* Fix things that firmware should have done. */
142 lite5200_fix_clock_config();
143 lite5200_fix_port_config();
145 /* Some mpc5200 & mpc5200b related configuration */
146 mpc5200_setup_xlb_arbiter();
149 mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
150 mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
155 np = of_find_node_by_type(NULL, "pci");
157 mpc52xx_add_bridge(np);
162 #ifdef CONFIG_BLK_DEV_INITRD
164 ROOT_DEV = Root_RAM0;
167 #ifdef CONFIG_ROOT_NFS
170 ROOT_DEV = Root_HDA1;
176 * Called very early, MMU is off, device-tree isn't unflattened
178 static int __init lite5200_probe(void)
180 unsigned long node = of_get_flat_dt_root();
181 const char *model = of_get_flat_dt_prop(node, "model", NULL);
183 if (!of_flat_dt_is_compatible(node, "fsl,lite5200") &&
184 !of_flat_dt_is_compatible(node, "fsl,lite5200b"))
186 pr_debug("%s board found\n", model ? model : "unknown");
191 define_machine(lite5200) {
193 .probe = lite5200_probe,
194 .setup_arch = lite5200_setup_arch,
195 .init = mpc52xx_declare_of_platform_devices,
196 .init_IRQ = mpc52xx_init_irq,
197 .get_irq = mpc52xx_get_irq,
198 .calibrate_decr = generic_calibrate_decr,