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
  17 #include <asm/time.h>
  18 #include <asm/prom.h>
  19 #include <asm/mpic.h>
  20 #include <asm/pci-bridge.h>
  21
  22 #include "mpc10x.h"
  23
  24 static struct mtd_partition linkstation_physmap_partitions[] = {
  25         {
  26                 .name   = "mtd_firmimg",
  27                 .offset = 0x000000,
  28                 .size   = 0x300000,
  29         },
  30         {
  31                 .name   = "mtd_bootcode",
  32                 .offset = 0x300000,
  33                 .size   = 0x070000,
  34         },
  35         {
  36                 .name   = "mtd_status",
  37                 .offset = 0x370000,
  38                 .size   = 0x010000,
  39         },
  40         {
  41                 .name   = "mtd_conf",
  42                 .offset = 0x380000,
  43                 .size   = 0x080000,
  44         },
  45         {
  46                 .name   = "mtd_allflash",
  47                 .offset = 0x000000,
  48                 .size   = 0x400000,
  49         },
  50         {
  51                 .name   = "mtd_data",
  52                 .offset = 0x310000,
  53                 .size   = 0x0f0000,
  54         },
  55 };
  56
  57 static int __init linkstation_add_bridge(struct device_node *dev)
  58 {
  59 #ifdef CONFIG_PCI
  60         int len;
  61         struct pci_controller *hose;
  62         const int *bus_range;
  63
  64         printk("Adding PCI host bridge %s\n", dev->full_name);
  65
  66         bus_range = of_get_property(dev, "bus-range", &len);
  67         if (bus_range == NULL || len < 2 * sizeof(int))
  68                 printk(KERN_WARNING "Can't get bus-range for %s, assume"
  69                                 " bus 0\n", dev->full_name);
  70
  71         hose = pcibios_alloc_controller(dev);
  72         if (hose == NULL)
  73                 return -ENOMEM;
  74         hose->first_busno = bus_range ? bus_range[0] : 0;
  75         hose->last_busno = bus_range ? bus_range[1] : 0xff;
  76         setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
  77
  78         /* Interpret the "ranges" property */
  79         /* This also maps the I/O region and sets isa_io/mem_base */
  80         pci_process_bridge_OF_ranges(hose, dev, 1);
  81 #endif
  82         return 0;
  83 }
  84
  85 static void __init linkstation_setup_arch(void)
  86 {
  87         struct device_node *np;
  88 #ifdef CONFIG_MTD_PHYSMAP
  89         physmap_set_partitions(linkstation_physmap_partitions,
  90                                ARRAY_SIZE(linkstation_physmap_partitions));
  91 #endif
  92
  93         /* Lookup PCI host bridges */
  94         for_each_compatible_node(np, "pci", "mpc10x-pci")
  95                 linkstation_add_bridge(np);
  96
  97         printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
  98         printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
  99 }
 100
 101 /*
 102  * Interrupt setup and service.  Interrupts on the linkstation come
 103  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 104  */
 105 static void __init linkstation_init_IRQ(void)
 106 {
 107         struct mpic *mpic;
 108         struct device_node *dnp;
 109         const u32 *prop;
 110         int size;
 111         phys_addr_t paddr;
 112
 113         dnp = of_find_node_by_type(NULL, "open-pic");
 114         if (dnp == NULL)
 115                 return;
 116
 117         prop = of_get_property(dnp, "reg", &size);
 118         paddr = (phys_addr_t)of_translate_address(dnp, prop);
 119
 120         mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC     ");
 121         BUG_ON(mpic == NULL);
 122
 123         /* PCI IRQs */
 124         mpic_assign_isu(mpic, 0, paddr + 0x10200);
 125
 126         /* I2C */
 127         mpic_assign_isu(mpic, 1, paddr + 0x11000);
 128
 129         /* ttyS0, ttyS1 */
 130         mpic_assign_isu(mpic, 2, paddr + 0x11100);
 131
 132         mpic_init(mpic);
 133 }
 134
 135 extern void avr_uart_configure(void);
 136 extern void avr_uart_send(const char);
 137
 138 static void linkstation_restart(char *cmd)
 139 {
 140         local_irq_disable();
 141
 142         /* Reset system via AVR */
 143         avr_uart_configure();
 144         /* Send reboot command */
 145         avr_uart_send('C');
 146
 147         for(;;)  /* Spin until reset happens */
 148                 avr_uart_send('G');     /* "kick" */
 149 }
 150
 151 static void linkstation_power_off(void)
 152 {
 153         local_irq_disable();
 154
 155         /* Power down system via AVR */
 156         avr_uart_configure();
 157         /* send shutdown command */
 158         avr_uart_send('E');
 159
 160         for(;;)  /* Spin until power-off happens */
 161                 avr_uart_send('G');     /* "kick" */
 162         /* NOTREACHED */
 163 }
 164
 165 static void linkstation_halt(void)
 166 {
 167         linkstation_power_off();
 168         /* NOTREACHED */
 169 }
 170
 171 static void linkstation_show_cpuinfo(struct seq_file *m)
 172 {
 173         seq_printf(m, "vendor\t\t: Buffalo Technology\n");
 174         seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
 175 }
 176
 177 static int __init linkstation_probe(void)
 178 {
 179         unsigned long root;
 180
 181         root = of_get_flat_dt_root();
 182
 183         if (!of_flat_dt_is_compatible(root, "linkstation"))
 184                 return 0;
 185         return 1;
 186 }
 187
 188 define_machine(linkstation){
 189         .name                   = "Buffalo Linkstation",
 190         .probe                  = linkstation_probe,
 191         .setup_arch             = linkstation_setup_arch,
 192         .init_IRQ               = linkstation_init_IRQ,
 193         .show_cpuinfo           = linkstation_show_cpuinfo,
 194         .get_irq                = mpic_get_irq,
 195         .restart                = linkstation_restart,
 196         .power_off              = linkstation_power_off,
 197         .halt                   = linkstation_halt,
 198         .calibrate_decr         = generic_calibrate_decr,
 199 };