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/pci.h>
  15 #include <linux/initrd.h>
  16 #include <linux/root_dev.h>
  17 #include <linux/mtd/physmap.h>
  18
  19 #include <asm/time.h>
  20 #include <asm/prom.h>
  21 #include <asm/mpic.h>
  22 #include <asm/mpc10x.h>
  23 #include <asm/pci-bridge.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 int __init add_bridge(struct device_node *dev)
  59 {
  60         int len;
  61         struct pci_controller *hose;
  62         int *bus_range;
  63
  64         printk("Adding PCI host bridge %s\n", dev->full_name);
  65
  66         bus_range = (int *) 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();
  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         hose->arch_data = dev;
  77         setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
  78
  79         /* Interpret the "ranges" property */
  80         /* This also maps the I/O region and sets isa_io/mem_base */
  81         pci_process_bridge_OF_ranges(hose, dev, 1);
  82
  83         return 0;
  84 }
  85
  86 static void __init linkstation_setup_arch(void)
  87 {
  88         struct device_node *np;
  89 #ifdef CONFIG_MTD_PHYSMAP
  90         physmap_set_partitions(linkstation_physmap_partitions,
  91                                ARRAY_SIZE(linkstation_physmap_partitions));
  92 #endif
  93
  94 #ifdef CONFIG_BLK_DEV_INITRD
  95         if (initrd_start)
  96                 ROOT_DEV = Root_RAM0;
  97         else
  98 #endif
  99 #ifdef  CONFIG_ROOT_NFS
 100                 ROOT_DEV = Root_NFS;
 101 #else
 102                 ROOT_DEV = Root_HDA1;
 103 #endif
 104
 105         /* Lookup PCI host bridges */
 106         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
 107                 add_bridge(np);
 108
 109         printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
 110         printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
 111 }
 112
 113 /*
 114  * Interrupt setup and service.  Interrrupts on the linkstation come
 115  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 116  */
 117 static void __init linkstation_init_IRQ(void)
 118 {
 119         struct mpic *mpic;
 120         struct device_node *dnp;
 121         void *prop;
 122         int size;
 123         phys_addr_t paddr;
 124
 125         dnp = of_find_node_by_type(NULL, "open-pic");
 126         if (dnp == NULL)
 127                 return;
 128
 129         prop = (struct device_node *)get_property(dnp, "reg", &size);
 130         paddr = (phys_addr_t)of_translate_address(dnp, prop);
 131
 132         mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC     ");
 133         BUG_ON(mpic == NULL);
 134
 135         /* PCI IRQs */
 136         mpic_assign_isu(mpic, 0, paddr + 0x10200);
 137
 138         /* I2C */
 139         mpic_assign_isu(mpic, 1, paddr + 0x11000);
 140
 141         /* ttyS0, ttyS1 */
 142         mpic_assign_isu(mpic, 2, paddr + 0x11100);
 143
 144         mpic_init(mpic);
 145 }
 146
 147 extern void avr_uart_configure(void);
 148 extern void avr_uart_send(const char);
 149
 150 static void linkstation_restart(char *cmd)
 151 {
 152         local_irq_disable();
 153
 154         /* Reset system via AVR */
 155         avr_uart_configure();
 156         /* Send reboot command */
 157         avr_uart_send('C');
 158
 159         for(;;)  /* Spin until reset happens */
 160                 avr_uart_send('G');     /* "kick" */
 161 }
 162
 163 static void linkstation_power_off(void)
 164 {
 165         local_irq_disable();
 166
 167         /* Power down system via AVR */
 168         avr_uart_configure();
 169         /* send shutdown command */
 170         avr_uart_send('E');
 171
 172         for(;;)  /* Spin until power-off happens */
 173                 avr_uart_send('G');     /* "kick" */
 174         /* NOTREACHED */
 175 }
 176
 177 static void linkstation_halt(void)
 178 {
 179         linkstation_power_off();
 180         /* NOTREACHED */
 181 }
 182
 183 static void linkstation_show_cpuinfo(struct seq_file *m)
 184 {
 185         seq_printf(m, "vendor\t\t: Buffalo Technology\n");
 186         seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
 187 }
 188
 189 static int __init linkstation_probe(void)
 190 {
 191         unsigned long root;
 192
 193         root = of_get_flat_dt_root();
 194
 195         if (!of_flat_dt_is_compatible(root, "linkstation"))
 196                 return 0;
 197         return 1;
 198 }
 199
 200 define_machine(linkstation){
 201         .name                   = "Buffalo Linkstation",
 202         .probe                  = linkstation_probe,
 203         .setup_arch             = linkstation_setup_arch,
 204         .init_IRQ               = linkstation_init_IRQ,
 205         .show_cpuinfo           = linkstation_show_cpuinfo,
 206         .get_irq                = mpic_get_irq,
 207         .restart                = linkstation_restart,
 208         .power_off              = linkstation_power_off,
 209         .halt                   = linkstation_halt,
 210         .calibrate_decr         = generic_calibrate_decr,
 211 };