arch/ppc/platforms/lopec_setup.c

   1 /*
   2  * arch/ppc/platforms/lopec_setup.c
   3  *
   4  * Setup routines for the Motorola LoPEC.
   5  *
   6  * Author: Dan Cox
   7  *         danc@mvista.com
   8  *
   9  * 2001-2002 (c) MontaVista, Software, Inc.  This file is licensed under
  10  * the terms of the GNU General Public License version 2.  This program
  11  * is licensed "as is" without any warranty of any kind, whether express
  12  * or implied.
  13  */
  14
  15 #include <linux/config.h>
  16 #include <linux/types.h>
  17 #include <linux/delay.h>
  18 #include <linux/pci_ids.h>
  19 #include <linux/ioport.h>
  20 #include <linux/init.h>
  21 #include <linux/ide.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/initrd.h>
  24 #include <linux/console.h>
  25 #include <linux/root_dev.h>
  26
  27 #include <asm/io.h>
  28 #include <asm/open_pic.h>
  29 #include <asm/i8259.h>
  30 #include <asm/todc.h>
  31 #include <asm/bootinfo.h>
  32 #include <asm/mpc10x.h>
  33 #include <asm/hw_irq.h>
  34 #include <asm/prep_nvram.h>
  35
  36 extern void lopec_find_bridges(void);
  37
  38 /*
  39  * Define all of the IRQ senses and polarities.  Taken from the
  40  * LoPEC Programmer's Reference Guide.
  41  */
  42 static u_char lopec_openpic_initsenses[16] __initdata = {
  43         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 0 */
  44         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 1 */
  45         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 2 */
  46         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 3 */
  47         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 4 */
  48         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 5 */
  49         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 6 */
  50         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 7 */
  51         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 8 */
  52         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 9 */
  53         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 10 */
  54         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 11 */
  55         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 12 */
  56         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 13 */
  57         (IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE),       /* IRQ 14 */
  58         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE)       /* IRQ 15 */
  59 };
  60
  61 static int
  62 lopec_show_cpuinfo(struct seq_file *m)
  63 {
  64         seq_printf(m, "machine\t\t: Motorola LoPEC\n");
  65         return 0;
  66 }
  67
  68 static u32
  69 lopec_irq_canonicalize(u32 irq)
  70 {
  71         if (irq == 2)
  72                 return 9;
  73         else
  74                 return irq;
  75 }
  76
  77 static void
  78 lopec_restart(char *cmd)
  79 {
  80 #define LOPEC_SYSSTAT1 0xffe00000
  81         /* force a hard reset, if possible */
  82         unsigned char reg = *((unsigned char *) LOPEC_SYSSTAT1);
  83         reg |= 0x80;
  84         *((unsigned char *) LOPEC_SYSSTAT1) = reg;
  85
  86         local_irq_disable();
  87         while(1);
  88 #undef LOPEC_SYSSTAT1
  89 }
  90
  91 static void
  92 lopec_halt(void)
  93 {
  94         local_irq_disable();
  95         while(1);
  96 }
  97
  98 static void
  99 lopec_power_off(void)
 100 {
 101         lopec_halt();
 102 }
 103
 104 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 105 int lopec_ide_ports_known = 0;
 106 static unsigned long lopec_ide_regbase[MAX_HWIFS];
 107 static unsigned long lopec_ide_ctl_regbase[MAX_HWIFS];
 108 static unsigned long lopec_idedma_regbase;
 109
 110 static void
 111 lopec_ide_probe(void)
 112 {
 113         struct pci_dev *dev = pci_find_device(PCI_VENDOR_ID_WINBOND,
 114                                               PCI_DEVICE_ID_WINBOND_82C105,
 115                                               NULL);
 116         lopec_ide_ports_known = 1;
 117
 118         if (dev) {
 119                 lopec_ide_regbase[0] = dev->resource[0].start;
 120                 lopec_ide_regbase[1] = dev->resource[2].start;
 121                 lopec_ide_ctl_regbase[0] = dev->resource[1].start;
 122                 lopec_ide_ctl_regbase[1] = dev->resource[3].start;
 123                 lopec_idedma_regbase = dev->resource[4].start;
 124         }
 125 }
 126
 127 static int
 128 lopec_ide_default_irq(unsigned long base)
 129 {
 130         if (lopec_ide_ports_known == 0)
 131                 lopec_ide_probe();
 132
 133         if (base == lopec_ide_regbase[0])
 134                 return 14;
 135         else if (base == lopec_ide_regbase[1])
 136                 return 15;
 137         else
 138                 return 0;
 139 }
 140
 141 static unsigned long
 142 lopec_ide_default_io_base(int index)
 143 {
 144         if (lopec_ide_ports_known == 0)
 145                 lopec_ide_probe();
 146         return lopec_ide_regbase[index];
 147 }
 148
 149 static void __init
 150 lopec_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data,
 151                           unsigned long ctl, int *irq)
 152 {
 153         unsigned long reg = data;
 154         uint alt_status_base;
 155         int i;
 156
 157         for(i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 158                 hw->io_ports[i] = reg++;
 159
 160         if (data == lopec_ide_regbase[0]) {
 161                 alt_status_base = lopec_ide_ctl_regbase[0] + 2;
 162                 hw->irq = 14;
 163         }
 164         else if (data == lopec_ide_regbase[1]) {
 165                 alt_status_base = lopec_ide_ctl_regbase[1] + 2;
 166                 hw->irq = 15;
 167         }
 168         else {
 169                 alt_status_base = 0;
 170                 hw->irq = 0;
 171         }
 172
 173         if (ctl)
 174                 hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
 175         else
 176                 hw->io_ports[IDE_CONTROL_OFFSET] = alt_status_base;
 177
 178         if (irq != NULL)
 179                 *irq = hw->irq;
 180
 181 }
 182 #endif /* BLK_DEV_IDE */
 183
 184 static void __init
 185 lopec_init_IRQ(void)
 186 {
 187         int i;
 188
 189         /*
 190          * Provide the open_pic code with the correct table of interrupts.
 191          */
 192         OpenPIC_InitSenses = lopec_openpic_initsenses;
 193         OpenPIC_NumInitSenses = sizeof(lopec_openpic_initsenses);
 194
 195         mpc10x_set_openpic();
 196
 197         /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
 198         openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
 199                         &i8259_irq);
 200
 201         /* Map i8259 interrupts */
 202         for(i = 0; i < NUM_8259_INTERRUPTS; i++)
 203                 irq_desc[i].handler = &i8259_pic;
 204
 205         /*
 206          * The EPIC allows for a read in the range of 0xFEF00000 ->
 207          * 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
 208          */
 209         i8259_init(0xfef00000);
 210 }
 211
 212 static int __init
 213 lopec_request_io(void)
 214 {
 215         outb(0x00, 0x4d0);
 216         outb(0xc0, 0x4d1);
 217
 218         request_region(0x00, 0x20, "dma1");
 219         request_region(0x20, 0x20, "pic1");
 220         request_region(0x40, 0x20, "timer");
 221         request_region(0x80, 0x10, "dma page reg");
 222         request_region(0xa0, 0x20, "pic2");
 223         request_region(0xc0, 0x20, "dma2");
 224
 225         return 0;
 226 }
 227
 228 device_initcall(lopec_request_io);
 229
 230 static void __init
 231 lopec_map_io(void)
 232 {
 233         io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
 234         io_block_mapping(0xb0000000, 0xb0000000, 0x10000000, _PAGE_IO);
 235 }
 236
 237 static void __init
 238 lopec_set_bat(void)
 239 {
 240         unsigned long batu, batl;
 241
 242         __asm__ __volatile__(
 243                 "lis %0,0xf800\n \
 244                  ori %1,%0,0x002a\n \
 245                  ori %0,%0,0x0ffe\n \
 246                  mtspr 0x21e,%0\n \
 247                  mtspr 0x21f,%1\n \
 248                  isync\n \
 249                  sync "
 250                 : "=r" (batu), "=r" (batl));
 251 }
 252
 253 #ifdef  CONFIG_SERIAL_TEXT_DEBUG
 254 #include <linux/serial.h>
 255 #include <linux/serialP.h>
 256 #include <linux/serial_reg.h>
 257 #include <asm/serial.h>
 258
 259 static struct serial_state rs_table[RS_TABLE_SIZE] = {
 260         SERIAL_PORT_DFNS        /* Defined in <asm/serial.h> */
 261 };
 262
 263 volatile unsigned char *com_port;
 264 volatile unsigned char *com_port_lsr;
 265
 266 static void
 267 serial_writechar(char c)
 268 {
 269         while ((*com_port_lsr & UART_LSR_THRE) == 0)
 270                 ;
 271         *com_port = c;
 272 }
 273
 274 void
 275 lopec_progress(char *s, unsigned short hex)
 276 {
 277         volatile char c;
 278
 279         com_port = (volatile unsigned char *) rs_table[0].port;
 280         com_port_lsr = com_port + UART_LSR;
 281
 282         while ((c = *s++) != 0)
 283                 serial_writechar(c);
 284
 285         /* Most messages don't have a newline in them */
 286         serial_writechar('\n');
 287         serial_writechar('\r');
 288 }
 289 #endif  /* CONFIG_SERIAL_TEXT_DEBUG */
 290
 291 TODC_ALLOC();
 292
 293 static void __init
 294 lopec_setup_arch(void)
 295 {
 296
 297         TODC_INIT(TODC_TYPE_MK48T37, 0, 0,
 298                   ioremap(0xffe80000, 0x8000), 8);
 299
 300         loops_per_jiffy = 100000000/HZ;
 301
 302         lopec_find_bridges();
 303
 304 #ifdef CONFIG_BLK_DEV_INITRD
 305         if (initrd_start)
 306                 ROOT_DEV = Root_RAM0;
 307         else
 308 #elif defined(CONFIG_ROOT_NFS)
 309                 ROOT_DEV = Root_NFS;
 310 #elif defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 311                 ROOT_DEV = Root_HDA1;
 312 #else
 313                 ROOT_DEV = Root_SDA1;
 314 #endif
 315
 316 #ifdef CONFIG_VT
 317         conswitchp = &dummy_con;
 318 #endif
 319 #ifdef CONFIG_PPCBUG_NVRAM
 320         /* Read in NVRAM data */
 321         init_prep_nvram();
 322
 323         /* if no bootargs, look in NVRAM */
 324         if ( cmd_line[0] == '\0' ) {
 325                 char *bootargs;
 326                  bootargs = prep_nvram_get_var("bootargs");
 327                  if (bootargs != NULL) {
 328                          strcpy(cmd_line, bootargs);
 329                          /* again.. */
 330                          strcpy(saved_command_line, cmd_line);
 331                 }
 332         }
 333 #endif
 334 }
 335
 336 void __init
 337 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 338               unsigned long r6, unsigned long r7)
 339 {
 340         parse_bootinfo(find_bootinfo());
 341         lopec_set_bat();
 342
 343         isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
 344         isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
 345         pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
 346         ISA_DMA_THRESHOLD = 0x00ffffff;
 347         DMA_MODE_READ = 0x44;
 348         DMA_MODE_WRITE = 0x48;
 349
 350         ppc_md.setup_arch = lopec_setup_arch;
 351         ppc_md.show_cpuinfo = lopec_show_cpuinfo;
 352         ppc_md.irq_canonicalize = lopec_irq_canonicalize;
 353         ppc_md.init_IRQ = lopec_init_IRQ;
 354         ppc_md.get_irq = openpic_get_irq;
 355
 356         ppc_md.restart = lopec_restart;
 357         ppc_md.power_off = lopec_power_off;
 358         ppc_md.halt = lopec_halt;
 359
 360         ppc_md.setup_io_mappings = lopec_map_io;
 361
 362         ppc_md.time_init = todc_time_init;
 363         ppc_md.set_rtc_time = todc_set_rtc_time;
 364         ppc_md.get_rtc_time = todc_get_rtc_time;
 365         ppc_md.calibrate_decr = todc_calibrate_decr;
 366
 367         ppc_md.nvram_read_val = todc_direct_read_val;
 368         ppc_md.nvram_write_val = todc_direct_write_val;
 369
 370 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 371         ppc_ide_md.default_irq = lopec_ide_default_irq;
 372         ppc_ide_md.default_io_base = lopec_ide_default_io_base;
 373         ppc_ide_md.ide_init_hwif = lopec_ide_init_hwif_ports;
 374 #endif
 375 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 376         ppc_md.progress = lopec_progress;
 377 #endif
 378 }