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Linux/arch/powerpc/platforms/83xx/mpc832x_mds.c

  1 /*
  2  * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
  3  *
  4  * Description:
  5  * MPC832xE MDS board specific routines.
  6  *
  7  * This program is free software; you can redistribute  it and/or modify it
  8  * under  the terms of  the GNU General  Public License as published by the
  9  * Free Software Foundation;  either version 2 of the  License, or (at your
 10  * option) any later version.
 11  */
 12 
 13 #include <linux/stddef.h>
 14 #include <linux/kernel.h>
 15 #include <linux/init.h>
 16 #include <linux/errno.h>
 17 #include <linux/reboot.h>
 18 #include <linux/pci.h>
 19 #include <linux/kdev_t.h>
 20 #include <linux/major.h>
 21 #include <linux/console.h>
 22 #include <linux/delay.h>
 23 #include <linux/seq_file.h>
 24 #include <linux/root_dev.h>
 25 #include <linux/initrd.h>
 26 #include <linux/of_platform.h>
 27 #include <linux/of_device.h>
 28 
 29 #include <linux/atomic.h>
 30 #include <asm/time.h>
 31 #include <asm/io.h>
 32 #include <asm/machdep.h>
 33 #include <asm/ipic.h>
 34 #include <asm/irq.h>
 35 #include <asm/prom.h>
 36 #include <asm/udbg.h>
 37 #include <sysdev/fsl_soc.h>
 38 #include <sysdev/fsl_pci.h>
 39 #include <soc/fsl/qe/qe.h>
 40 #include <soc/fsl/qe/qe_ic.h>
 41 
 42 #include "mpc83xx.h"
 43 
 44 #undef DEBUG
 45 #ifdef DEBUG
 46 #define DBG(fmt...) udbg_printf(fmt)
 47 #else
 48 #define DBG(fmt...)
 49 #endif
 50 
 51 /* ************************************************************************
 52  *
 53  * Setup the architecture
 54  *
 55  */
 56 static void __init mpc832x_sys_setup_arch(void)
 57 {
 58         struct device_node *np;
 59         u8 __iomem *bcsr_regs = NULL;
 60 
 61         if (ppc_md.progress)
 62                 ppc_md.progress("mpc832x_sys_setup_arch()", 0);
 63 
 64         /* Map BCSR area */
 65         np = of_find_node_by_name(NULL, "bcsr");
 66         if (np) {
 67                 struct resource res;
 68 
 69                 of_address_to_resource(np, 0, &res);
 70                 bcsr_regs = ioremap(res.start, resource_size(&res));
 71                 of_node_put(np);
 72         }
 73 
 74         mpc83xx_setup_pci();
 75 
 76 #ifdef CONFIG_QUICC_ENGINE
 77         if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
 78                 par_io_init(np);
 79                 of_node_put(np);
 80 
 81                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
 82                         par_io_of_config(np);
 83         }
 84 
 85         if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
 86                         != NULL){
 87                 /* Reset the Ethernet PHYs */
 88 #define BCSR8_FETH_RST 0x50
 89                 clrbits8(&bcsr_regs[8], BCSR8_FETH_RST);
 90                 udelay(1000);
 91                 setbits8(&bcsr_regs[8], BCSR8_FETH_RST);
 92                 iounmap(bcsr_regs);
 93                 of_node_put(np);
 94         }
 95 #endif                          /* CONFIG_QUICC_ENGINE */
 96 }
 97 
 98 machine_device_initcall(mpc832x_mds, mpc83xx_declare_of_platform_devices);
 99 
100 /*
101  * Called very early, MMU is off, device-tree isn't unflattened
102  */
103 static int __init mpc832x_sys_probe(void)
104 {
105         return of_machine_is_compatible("MPC832xMDS");
106 }
107 
108 define_machine(mpc832x_mds) {
109         .name           = "MPC832x MDS",
110         .probe          = mpc832x_sys_probe,
111         .setup_arch     = mpc832x_sys_setup_arch,
112         .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
113         .get_irq        = ipic_get_irq,
114         .restart        = mpc83xx_restart,
115         .time_init      = mpc83xx_time_init,
116         .calibrate_decr = generic_calibrate_decr,
117         .progress       = udbg_progress,
118 };
119 

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