arch/powerpc/platforms/embedded6xx/linkstation.c

   1 /*
   2  * Board setup routines for the Buffalo Linkstation / Kurobox Platform.
   3  *
   4  * Copyright (C) 2006 G. Liakhovetski (g.liakhovetski@gmx.de)
   5  *
   6  * Based on sandpoint.c by Mark A. Greer
   7  *
   8  * This file is licensed under the terms of the GNU General Public License
   9  * version 2.  This program is licensed "as is" without any warranty of
  10  * any kind, whether express or implied.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/initrd.h>
  15 #include <linux/mtd/physmap.h>
  16 #include <linux/of_platform.h>
  17
  18 #include <asm/time.h>
  19 #include <asm/prom.h>
  20 #include <asm/mpic.h>
  21 #include <asm/pci-bridge.h>
  22
  23 #include "mpc10x.h"
  24
  25 static struct mtd_partition linkstation_physmap_partitions[] = {
  26         {
  27                 .name   = "mtd_firmimg",
  28                 .offset = 0x000000,
  29                 .size   = 0x300000,
  30         },
  31         {
  32                 .name   = "mtd_bootcode",
  33                 .offset = 0x300000,
  34                 .size   = 0x070000,
  35         },
  36         {
  37                 .name   = "mtd_status",
  38                 .offset = 0x370000,
  39                 .size   = 0x010000,
  40         },
  41         {
  42                 .name   = "mtd_conf",
  43                 .offset = 0x380000,
  44                 .size   = 0x080000,
  45         },
  46         {
  47                 .name   = "mtd_allflash",
  48                 .offset = 0x000000,
  49                 .size   = 0x400000,
  50         },
  51         {
  52                 .name   = "mtd_data",
  53                 .offset = 0x310000,
  54                 .size   = 0x0f0000,
  55         },
  56 };
  57
  58 static __initdata struct of_device_id of_bus_ids[] = {
  59         { .type = "soc", },
  60         { .compatible = "simple-bus", },
  61         {},
  62 };
  63
  64 static int __init declare_of_platform_devices(void)
  65 {
  66         of_platform_bus_probe(NULL, of_bus_ids, NULL);
  67         return 0;
  68 }
  69 machine_device_initcall(linkstation, declare_of_platform_devices);
  70
  71 static int __init linkstation_add_bridge(struct device_node *dev)
  72 {
  73 #ifdef CONFIG_PCI
  74         int len;
  75         struct pci_controller *hose;
  76         const int *bus_range;
  77
  78         printk("Adding PCI host bridge %s\n", dev->full_name);
  79
  80         bus_range = of_get_property(dev, "bus-range", &len);
  81         if (bus_range == NULL || len < 2 * sizeof(int))
  82                 printk(KERN_WARNING "Can't get bus-range for %s, assume"
  83                                 " bus 0\n", dev->full_name);
  84
  85         hose = pcibios_alloc_controller(dev);
  86         if (hose == NULL)
  87                 return -ENOMEM;
  88         hose->first_busno = bus_range ? bus_range[0] : 0;
  89         hose->last_busno = bus_range ? bus_range[1] : 0xff;
  90         setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
  91
  92         /* Interpret the "ranges" property */
  93         /* This also maps the I/O region and sets isa_io/mem_base */
  94         pci_process_bridge_OF_ranges(hose, dev, 1);
  95 #endif
  96         return 0;
  97 }
  98
  99 static void __init linkstation_setup_arch(void)
 100 {
 101         struct device_node *np;
 102 #ifdef CONFIG_MTD_PHYSMAP
 103         physmap_set_partitions(linkstation_physmap_partitions,
 104                                ARRAY_SIZE(linkstation_physmap_partitions));
 105 #endif
 106
 107         /* Lookup PCI host bridges */
 108         for_each_compatible_node(np, "pci", "mpc10x-pci")
 109                 linkstation_add_bridge(np);
 110
 111         printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
 112         printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
 113 }
 114
 115 /*
 116  * Interrupt setup and service.  Interrupts on the linkstation come
 117  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 118  */
 119 static void __init linkstation_init_IRQ(void)
 120 {
 121         struct mpic *mpic;
 122         struct device_node *dnp;
 123         const u32 *prop;
 124         int size;
 125         phys_addr_t paddr;
 126
 127         dnp = of_find_node_by_type(NULL, "open-pic");
 128         if (dnp == NULL)
 129                 return;
 130
 131         prop = of_get_property(dnp, "reg", &size);
 132         paddr = (phys_addr_t)of_translate_address(dnp, prop);
 133
 134         mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC     ");
 135         BUG_ON(mpic == NULL);
 136
 137         /* PCI IRQs */
 138         mpic_assign_isu(mpic, 0, paddr + 0x10200);
 139
 140         /* I2C */
 141         mpic_assign_isu(mpic, 1, paddr + 0x11000);
 142
 143         /* ttyS0, ttyS1 */
 144         mpic_assign_isu(mpic, 2, paddr + 0x11100);
 145
 146         mpic_init(mpic);
 147 }
 148
 149 extern void avr_uart_configure(void);
 150 extern void avr_uart_send(const char);
 151
 152 static void linkstation_restart(char *cmd)
 153 {
 154         local_irq_disable();
 155
 156         /* Reset system via AVR */
 157         avr_uart_configure();
 158         /* Send reboot command */
 159         avr_uart_send('C');
 160
 161         for(;;)  /* Spin until reset happens */
 162                 avr_uart_send('G');     /* "kick" */
 163 }
 164
 165 static void linkstation_power_off(void)
 166 {
 167         local_irq_disable();
 168
 169         /* Power down system via AVR */
 170         avr_uart_configure();
 171         /* send shutdown command */
 172         avr_uart_send('E');
 173
 174         for(;;)  /* Spin until power-off happens */
 175                 avr_uart_send('G');     /* "kick" */
 176         /* NOTREACHED */
 177 }
 178
 179 static void linkstation_halt(void)
 180 {
 181         linkstation_power_off();
 182         /* NOTREACHED */
 183 }
 184
 185 static void linkstation_show_cpuinfo(struct seq_file *m)
 186 {
 187         seq_printf(m, "vendor\t\t: Buffalo Technology\n");
 188         seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
 189 }
 190
 191 static int __init linkstation_probe(void)
 192 {
 193         unsigned long root;
 194
 195         root = of_get_flat_dt_root();
 196
 197         if (!of_flat_dt_is_compatible(root, "linkstation"))
 198                 return 0;
 199         return 1;
 200 }
 201
 202 define_machine(linkstation){
 203         .name                   = "Buffalo Linkstation",
 204         .probe                  = linkstation_probe,
 205         .setup_arch             = linkstation_setup_arch,
 206         .init_IRQ               = linkstation_init_IRQ,
 207         .show_cpuinfo           = linkstation_show_cpuinfo,
 208         .get_irq                = mpic_get_irq,
 209         .restart                = linkstation_restart,
 210         .power_off              = linkstation_power_off,
 211         .halt                   = linkstation_halt,
 212         .calibrate_decr         = generic_calibrate_decr,
 213 };