git.oblomov.eu Git - linux-2.6/blob - arch/ppc/platforms/mvme5100.c

   1 /*
   2  * Board setup routines for the Motorola MVME5100.
   3  *
   4  * Author: Matt Porter <mporter@mvista.com>
   5  *
   6  * 2001-2004 (c) MontaVista, Software, Inc.  This file is licensed under
   7  * the terms of the GNU General Public License version 2.  This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 #include <linux/config.h>
  13 #include <linux/stddef.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/errno.h>
  17 #include <linux/pci.h>
  18 #include <linux/initrd.h>
  19 #include <linux/console.h>
  20 #include <linux/delay.h>
  21 #include <linux/ide.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/kdev_t.h>
  24 #include <linux/root_dev.h>
  25
  26 #include <asm/system.h>
  27 #include <asm/pgtable.h>
  28 #include <asm/page.h>
  29 #include <asm/dma.h>
  30 #include <asm/io.h>
  31 #include <asm/machdep.h>
  32 #include <asm/open_pic.h>
  33 #include <asm/i8259.h>
  34 #include <asm/todc.h>
  35 #include <asm/pci-bridge.h>
  36 #include <asm/bootinfo.h>
  37 #include <asm/hawk.h>
  38
  39 #include <platforms/pplus.h>
  40 #include <platforms/mvme5100.h>
  41
  42 static u_char mvme5100_openpic_initsenses[16] __initdata = {
  43         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* i8259 cascade */
  44         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* TL16C550 UART 1,2 */
  45         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet1 front panel or P2 */
  46         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Hawk Watchdog 1,2 */
  47         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* DS1621 thermal alarm */
  48         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT0# */
  49         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT1# */
  50         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT2# */
  51         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT3# */
  52         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTA#, PMC2 INTB# */
  53         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTB#, PMC2 INTC# */
  54         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTC#, PMC2 INTD# */
  55         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTD#, PMC2 INTA# */
  56         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet 2 (front panel) */
  57         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Abort Switch */
  58         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* RTC Alarm */
  59 };
  60
  61 static inline int
  62 mvme5100_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
  63 {
  64         int irq;
  65
  66         static char pci_irq_table[][4] =
  67         /*
  68          *      PCI IDSEL/INTPIN->INTLINE
  69          *         A   B   C   D
  70          */
  71         {
  72                 {  0,  0,  0,  0 },     /* IDSEL 11 - Winbond */
  73                 {  0,  0,  0,  0 },     /* IDSEL 12 - unused */
  74                 { 21, 22, 23, 24 },     /* IDSEL 13 - Universe II */
  75                 { 18,  0,  0,  0 },     /* IDSEL 14 - Enet 1 */
  76                 {  0,  0,  0,  0 },     /* IDSEL 15 - unused */
  77                 { 25, 26, 27, 28 },     /* IDSEL 16 - PMC Slot 1 */
  78                 { 28, 25, 26, 27 },     /* IDSEL 17 - PMC Slot 2 */
  79                 {  0,  0,  0,  0 },     /* IDSEL 18 - unused */
  80                 { 29,  0,  0,  0 },     /* IDSEL 19 - Enet 2 */
  81                 {  0,  0,  0,  0 },     /* IDSEL 20 - PMCSPAN */
  82         };
  83
  84         const long min_idsel = 11, max_idsel = 20, irqs_per_slot = 4;
  85         irq = PCI_IRQ_TABLE_LOOKUP;
  86         /* If lookup is zero, always return 0 */
  87         if (!irq)
  88                 return 0;
  89         else
  90 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
  91         /* If IPMC761 present, return table value */
  92         return irq;
  93 #else
  94         /* If IPMC761 not present, we don't have an i8259 so adjust */
  95         return (irq - NUM_8259_INTERRUPTS);
  96 #endif
  97 }
  98
  99 static void
 100 mvme5100_pcibios_fixup_resources(struct pci_dev *dev)
 101 {
 102         int i;
 103
 104         if ((dev->vendor == PCI_VENDOR_ID_MOTOROLA) &&
 105                         (dev->device == PCI_DEVICE_ID_MOTOROLA_HAWK))
 106                 for (i=0; i<DEVICE_COUNT_RESOURCE; i++)
 107                 {
 108                         dev->resource[i].start = 0;
 109                         dev->resource[i].end = 0;
 110                 }
 111 }
 112
 113 static void __init
 114 mvme5100_setup_bridge(void)
 115 {
 116         struct pci_controller*  hose;
 117
 118         hose = pcibios_alloc_controller();
 119
 120         if (!hose)
 121                 return;
 122
 123         hose->first_busno = 0;
 124         hose->last_busno = 0xff;
 125         hose->pci_mem_offset = MVME5100_PCI_MEM_OFFSET;
 126
 127         pci_init_resource(&hose->io_resource, MVME5100_PCI_LOWER_IO,
 128                         MVME5100_PCI_UPPER_IO, IORESOURCE_IO,
 129                         "PCI host bridge");
 130
 131         pci_init_resource(&hose->mem_resources[0], MVME5100_PCI_LOWER_MEM,
 132                         MVME5100_PCI_UPPER_MEM, IORESOURCE_MEM,
 133                         "PCI host bridge");
 134
 135         hose->io_space.start = MVME5100_PCI_LOWER_IO;
 136         hose->io_space.end = MVME5100_PCI_UPPER_IO;
 137         hose->mem_space.start = MVME5100_PCI_LOWER_MEM;
 138         hose->mem_space.end = MVME5100_PCI_UPPER_MEM;
 139         hose->io_base_virt = (void *)MVME5100_ISA_IO_BASE;
 140
 141         /* Use indirect method of Hawk */
 142         setup_indirect_pci(hose, MVME5100_PCI_CONFIG_ADDR,
 143                         MVME5100_PCI_CONFIG_DATA);
 144
 145         hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
 146
 147         ppc_md.pcibios_fixup_resources = mvme5100_pcibios_fixup_resources;
 148         ppc_md.pci_swizzle = common_swizzle;
 149         ppc_md.pci_map_irq = mvme5100_map_irq;
 150 }
 151
 152 static void __init
 153 mvme5100_setup_arch(void)
 154 {
 155         if ( ppc_md.progress )
 156                 ppc_md.progress("mvme5100_setup_arch: enter", 0);
 157
 158         loops_per_jiffy = 50000000 / HZ;
 159
 160 #ifdef CONFIG_BLK_DEV_INITRD
 161         if (initrd_start)
 162                 ROOT_DEV = Root_RAM0;
 163         else
 164 #endif
 165 #ifdef  CONFIG_ROOT_NFS
 166                 ROOT_DEV = Root_NFS;
 167 #else
 168                 ROOT_DEV = Root_SDA2;
 169 #endif
 170
 171         if ( ppc_md.progress )
 172                 ppc_md.progress("mvme5100_setup_arch: find_bridges", 0);
 173
 174         /* Setup PCI host bridge */
 175         mvme5100_setup_bridge();
 176
 177         /* Find and map our OpenPIC */
 178         hawk_mpic_init(MVME5100_PCI_MEM_OFFSET);
 179         OpenPIC_InitSenses = mvme5100_openpic_initsenses;
 180         OpenPIC_NumInitSenses = sizeof(mvme5100_openpic_initsenses);
 181
 182         printk("MVME5100 port (C) 2001 MontaVista Software, Inc. (source@mvista.com)\n");
 183
 184         if ( ppc_md.progress )
 185                 ppc_md.progress("mvme5100_setup_arch: exit", 0);
 186
 187         return;
 188 }
 189
 190 static void __init
 191 mvme5100_init2(void)
 192 {
 193 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
 194                 request_region(0x00,0x20,"dma1");
 195                 request_region(0x20,0x20,"pic1");
 196                 request_region(0x40,0x20,"timer");
 197                 request_region(0x80,0x10,"dma page reg");
 198                 request_region(0xa0,0x20,"pic2");
 199                 request_region(0xc0,0x20,"dma2");
 200 #endif
 201         return;
 202 }
 203
 204 /*
 205  * Interrupt setup and service.
 206  * Have MPIC on HAWK and cascaded 8259s on Winbond cascaded to MPIC.
 207  */
 208 static void __init
 209 mvme5100_init_IRQ(void)
 210 {
 211 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
 212         int i;
 213 #endif
 214
 215         if ( ppc_md.progress )
 216                 ppc_md.progress("init_irq: enter", 0);
 217
 218         openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
 219 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
 220         openpic_init(NUM_8259_INTERRUPTS);
 221         openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
 222                         &i8259_irq);
 223
 224         i8259_init(0, 0);
 225 #else
 226         openpic_init(0);
 227 #endif
 228
 229         if ( ppc_md.progress )
 230                 ppc_md.progress("init_irq: exit", 0);
 231
 232         return;
 233 }
 234
 235 /*
 236  * Set BAT 3 to map 0xf0000000 to end of physical memory space.
 237  */
 238 static __inline__ void
 239 mvme5100_set_bat(void)
 240 {
 241         mb();
 242         mtspr(SPRN_DBAT1U, 0xf0001ffe);
 243         mtspr(SPRN_DBAT1L, 0xf000002a);
 244         mb();
 245 }
 246
 247 static unsigned long __init
 248 mvme5100_find_end_of_memory(void)
 249 {
 250         return hawk_get_mem_size(MVME5100_HAWK_SMC_BASE);
 251 }
 252
 253 static void __init
 254 mvme5100_map_io(void)
 255 {
 256         io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
 257         ioremap_base = 0xfe000000;
 258 }
 259
 260 static void
 261 mvme5100_reset_board(void)
 262 {
 263         local_irq_disable();
 264
 265         /* Set exception prefix high - to the firmware */
 266         _nmask_and_or_msr(0, MSR_IP);
 267
 268         out_8((u_char *)MVME5100_BOARD_MODRST_REG, 0x01);
 269
 270         return;
 271 }
 272
 273 static void
 274 mvme5100_restart(char *cmd)
 275 {
 276         volatile ulong i = 10000000;
 277
 278         mvme5100_reset_board();
 279
 280         while (i-- > 0);
 281         panic("restart failed\n");
 282 }
 283
 284 static void
 285 mvme5100_halt(void)
 286 {
 287         local_irq_disable();
 288         while (1);
 289 }
 290
 291 static void
 292 mvme5100_power_off(void)
 293 {
 294         mvme5100_halt();
 295 }
 296
 297 static int
 298 mvme5100_show_cpuinfo(struct seq_file *m)
 299 {
 300         seq_printf(m, "vendor\t\t: Motorola\n");
 301         seq_printf(m, "machine\t\t: MVME5100\n");
 302
 303         return 0;
 304 }
 305
 306 TODC_ALLOC();
 307
 308 void __init
 309 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 310               unsigned long r6, unsigned long r7)
 311 {
 312         parse_bootinfo(find_bootinfo());
 313         mvme5100_set_bat();
 314
 315         isa_io_base = MVME5100_ISA_IO_BASE;
 316         isa_mem_base = MVME5100_ISA_MEM_BASE;
 317         pci_dram_offset = MVME5100_PCI_DRAM_OFFSET;
 318
 319         ppc_md.setup_arch = mvme5100_setup_arch;
 320         ppc_md.show_cpuinfo = mvme5100_show_cpuinfo;
 321         ppc_md.init_IRQ = mvme5100_init_IRQ;
 322         ppc_md.get_irq = openpic_get_irq;
 323         ppc_md.init = mvme5100_init2;
 324
 325         ppc_md.restart = mvme5100_restart;
 326         ppc_md.power_off = mvme5100_power_off;
 327         ppc_md.halt = mvme5100_halt;
 328
 329         ppc_md.find_end_of_memory = mvme5100_find_end_of_memory;
 330         ppc_md.setup_io_mappings = mvme5100_map_io;
 331
 332         TODC_INIT(TODC_TYPE_MK48T37, MVME5100_NVRAM_AS0, MVME5100_NVRAM_AS1,
 333                         MVME5100_NVRAM_DATA, 8);
 334
 335         ppc_md.time_init = todc_time_init;
 336         ppc_md.set_rtc_time = todc_set_rtc_time;
 337         ppc_md.get_rtc_time = todc_get_rtc_time;
 338         ppc_md.calibrate_decr = todc_calibrate_decr;
 339
 340         ppc_md.nvram_read_val = todc_m48txx_read_val;
 341         ppc_md.nvram_write_val = todc_m48txx_write_val;
 342 }