arch/powerpc/platforms/83xx/mpc834x_sys.c

   1 /*
   2  * arch/powerpc/platforms/83xx/mpc834x_sys.c
   3  *
   4  * MPC834x SYS board specific routines
   5  *
   6  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/stddef.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/reboot.h>
  19 #include <linux/pci.h>
  20 #include <linux/kdev_t.h>
  21 #include <linux/major.h>
  22 #include <linux/console.h>
  23 #include <linux/delay.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/root_dev.h>
  26
  27 #include <asm/system.h>
  28 #include <asm/atomic.h>
  29 #include <asm/time.h>
  30 #include <asm/io.h>
  31 #include <asm/machdep.h>
  32 #include <asm/ipic.h>
  33 #include <asm/bootinfo.h>
  34 #include <asm/irq.h>
  35 #include <asm/prom.h>
  36 #include <asm/udbg.h>
  37 #include <sysdev/fsl_soc.h>
  38
  39 #include "mpc83xx.h"
  40
  41 #ifndef CONFIG_PCI
  42 unsigned long isa_io_base = 0;
  43 unsigned long isa_mem_base = 0;
  44 #endif
  45
  46 #define BCSR5_INT_USB           0x02
  47 /* Note: This is only for PB, not for PB+PIB
  48  * On PB only port0 is connected using ULPI */
  49 static int mpc834x_usb_cfg(void)
  50 {
  51         unsigned long sccr, sicrl;
  52         void __iomem *immap;
  53         void __iomem *bcsr_regs = NULL;
  54         u8 bcsr5;
  55         struct device_node *np = NULL;
  56         int port0_is_dr = 0;
  57
  58         if ((np = of_find_compatible_node(np, "usb", "fsl-usb2-dr")) != NULL)
  59                 port0_is_dr = 1;
  60         if ((np = of_find_compatible_node(np, "usb", "fsl-usb2-mph")) != NULL){
  61                 if (port0_is_dr) {
  62                         printk(KERN_WARNING
  63                                 "There is only one USB port on PB board! \n");
  64                         return -1;
  65                 } else if (!port0_is_dr)
  66                         /* No usb port enabled */
  67                         return -1;
  68         }
  69
  70         immap = ioremap(get_immrbase(), 0x1000);
  71         if (!immap)
  72                 return -1;
  73
  74         /* Configure clock */
  75         sccr = in_be32(immap + MPC83XX_SCCR_OFFS);
  76         if (port0_is_dr)
  77                 sccr |= MPC83XX_SCCR_USB_DRCM_11;  /* 1:3 */
  78         else
  79                 sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
  80         out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
  81
  82         /* Configure Pin */
  83         sicrl = in_be32(immap + MPC83XX_SICRL_OFFS);
  84         /* set port0 only */
  85         if (port0_is_dr)
  86                 sicrl |= MPC83XX_SICRL_USB0;
  87         else
  88                 sicrl &= ~(MPC83XX_SICRL_USB0);
  89         out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
  90
  91         iounmap(immap);
  92
  93         /* Map BCSR area */
  94         np = of_find_node_by_name(NULL, "bcsr");
  95         if (np != 0) {
  96                 struct resource res;
  97
  98                 of_address_to_resource(np, 0, &res);
  99                 bcsr_regs = ioremap(res.start, res.end - res.start + 1);
 100                 of_node_put(np);
 101         }
 102         if (!bcsr_regs)
 103                 return -1;
 104
 105         /*
 106          * if SYS board is plug into PIB board,
 107          * force to use the PHY on SYS board
 108          */
 109         bcsr5 = in_8(bcsr_regs + 5);
 110         if (!(bcsr5 & BCSR5_INT_USB))
 111                 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
 112         iounmap(bcsr_regs);
 113         return 0;
 114 }
 115
 116 /* ************************************************************************
 117  *
 118  * Setup the architecture
 119  *
 120  */
 121 static void __init mpc834x_sys_setup_arch(void)
 122 {
 123         struct device_node *np;
 124
 125         if (ppc_md.progress)
 126                 ppc_md.progress("mpc834x_sys_setup_arch()", 0);
 127
 128         np = of_find_node_by_type(NULL, "cpu");
 129         if (np != 0) {
 130                 const unsigned int *fp =
 131                         get_property(np, "clock-frequency", NULL);
 132                 if (fp != 0)
 133                         loops_per_jiffy = *fp / HZ;
 134                 else
 135                         loops_per_jiffy = 50000000 / HZ;
 136                 of_node_put(np);
 137         }
 138
 139 #ifdef CONFIG_PCI
 140         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
 141                 add_bridge(np);
 142
 143         ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 144 #endif
 145
 146         mpc834x_usb_cfg();
 147
 148 #ifdef  CONFIG_ROOT_NFS
 149         ROOT_DEV = Root_NFS;
 150 #else
 151         ROOT_DEV = Root_HDA1;
 152 #endif
 153 }
 154
 155 static void __init mpc834x_sys_init_IRQ(void)
 156 {
 157         struct device_node *np;
 158
 159         np = of_find_node_by_type(NULL, "ipic");
 160         if (!np)
 161                 return;
 162
 163         ipic_init(np, 0);
 164
 165         /* Initialize the default interrupt mapping priorities,
 166          * in case the boot rom changed something on us.
 167          */
 168         ipic_set_default_priority();
 169 }
 170
 171 #if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374)
 172 extern ulong ds1374_get_rtc_time(void);
 173 extern int ds1374_set_rtc_time(ulong);
 174
 175 static int __init mpc834x_rtc_hookup(void)
 176 {
 177         struct timespec tv;
 178
 179         ppc_md.get_rtc_time = ds1374_get_rtc_time;
 180         ppc_md.set_rtc_time = ds1374_set_rtc_time;
 181
 182         tv.tv_nsec = 0;
 183         tv.tv_sec = (ppc_md.get_rtc_time) ();
 184         do_settimeofday(&tv);
 185
 186         return 0;
 187 }
 188
 189 late_initcall(mpc834x_rtc_hookup);
 190 #endif
 191
 192 /*
 193  * Called very early, MMU is off, device-tree isn't unflattened
 194  */
 195 static int __init mpc834x_sys_probe(void)
 196 {
 197         /* We always match for now, eventually we should look at the flat
 198            dev tree to ensure this is the board we are suppose to run on
 199         */
 200         return 1;
 201 }
 202
 203 define_machine(mpc834x_sys) {
 204         .name                   = "MPC834x SYS",
 205         .probe                  = mpc834x_sys_probe,
 206         .setup_arch             = mpc834x_sys_setup_arch,
 207         .init_IRQ               = mpc834x_sys_init_IRQ,
 208         .get_irq                = ipic_get_irq,
 209         .restart                = mpc83xx_restart,
 210         .time_init              = mpc83xx_time_init,
 211         .calibrate_decr         = generic_calibrate_decr,
 212         .progress               = udbg_progress,
 213 };