arch/arm/mach-ixp2000/ixdp2x01.c

   1 /*
   2  * arch/arm/mach-ixp2000/ixdp2x01.c
   3  *
   4  * Code common to Intel IXDP2401 and IXDP2801 platforms
   5  *
   6  * Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
   7  * Maintainer: Deepak Saxena <dsaxena@plexity.net>
   8  *
   9  * Copyright (C) 2002-2003 Intel Corp.
  10  * Copyright (C) 2003-2004 MontaVista Software, Inc.
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/mm.h>
  21 #include <linux/sched.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/bitops.h>
  24 #include <linux/pci.h>
  25 #include <linux/ioport.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/serial.h>
  29 #include <linux/tty.h>
  30 #include <linux/serial_core.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/serial_8250.h>
  33 #include <linux/io.h>
  34
  35 #include <asm/irq.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/page.h>
  38 #include <asm/system.h>
  39 #include <mach/hardware.h>
  40 #include <asm/mach-types.h>
  41
  42 #include <asm/mach/pci.h>
  43 #include <asm/mach/map.h>
  44 #include <asm/mach/irq.h>
  45 #include <asm/mach/time.h>
  46 #include <asm/mach/arch.h>
  47 #include <asm/mach/flash.h>
  48
  49 /*************************************************************************
  50  * IXDP2x01 IRQ Handling
  51  *************************************************************************/
  52 static void ixdp2x01_irq_mask(unsigned int irq)
  53 {
  54         ixp2000_reg_wrb(IXDP2X01_INT_MASK_SET_REG,
  55                                 IXP2000_BOARD_IRQ_MASK(irq));
  56 }
  57
  58 static void ixdp2x01_irq_unmask(unsigned int irq)
  59 {
  60         ixp2000_reg_write(IXDP2X01_INT_MASK_CLR_REG,
  61                                 IXP2000_BOARD_IRQ_MASK(irq));
  62 }
  63
  64 static u32 valid_irq_mask;
  65
  66 static void ixdp2x01_irq_handler(unsigned int irq, struct irq_desc *desc)
  67 {
  68         u32 ex_interrupt;
  69         int i;
  70
  71         desc->chip->mask(irq);
  72
  73         ex_interrupt = *IXDP2X01_INT_STAT_REG & valid_irq_mask;
  74
  75         if (!ex_interrupt) {
  76                 printk(KERN_ERR "Spurious IXDP2X01 CPLD interrupt!\n");
  77                 return;
  78         }
  79
  80         for (i = 0; i < IXP2000_BOARD_IRQS; i++) {
  81                 if (ex_interrupt & (1 << i)) {
  82                         int cpld_irq = IXP2000_BOARD_IRQ(0) + i;
  83                         generic_handle_irq(cpld_irq);
  84                 }
  85         }
  86
  87         desc->chip->unmask(irq);
  88 }
  89
  90 static struct irq_chip ixdp2x01_irq_chip = {
  91         .mask   = ixdp2x01_irq_mask,
  92         .ack    = ixdp2x01_irq_mask,
  93         .unmask = ixdp2x01_irq_unmask
  94 };
  95
  96 /*
  97  * We only do anything if we are the master NPU on the board.
  98  * The slave NPU only has the ethernet chip going directly to
  99  * the PCIB interrupt input.
 100  */
 101 void __init ixdp2x01_init_irq(void)
 102 {
 103         int irq = 0;
 104
 105         /* initialize chip specific interrupts */
 106         ixp2000_init_irq();
 107
 108         if (machine_is_ixdp2401())
 109                 valid_irq_mask = IXDP2401_VALID_IRQ_MASK;
 110         else
 111                 valid_irq_mask = IXDP2801_VALID_IRQ_MASK;
 112
 113         /* Mask all interrupts from CPLD, disable simulation */
 114         ixp2000_reg_write(IXDP2X01_INT_MASK_SET_REG, 0xffffffff);
 115         ixp2000_reg_wrb(IXDP2X01_INT_SIM_REG, 0);
 116
 117         for (irq = NR_IXP2000_IRQS; irq < NR_IXDP2X01_IRQS; irq++) {
 118                 if (irq & valid_irq_mask) {
 119                         set_irq_chip(irq, &ixdp2x01_irq_chip);
 120                         set_irq_handler(irq, handle_level_irq);
 121                         set_irq_flags(irq, IRQF_VALID);
 122                 } else {
 123                         set_irq_flags(irq, 0);
 124                 }
 125         }
 126
 127         /* Hook into PCI interrupts */
 128         set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x01_irq_handler);
 129 }
 130
 131
 132 /*************************************************************************
 133  * IXDP2x01 memory map
 134  *************************************************************************/
 135 static struct map_desc ixdp2x01_io_desc __initdata = {
 136         .virtual        = IXDP2X01_VIRT_CPLD_BASE,
 137         .pfn            = __phys_to_pfn(IXDP2X01_PHYS_CPLD_BASE),
 138         .length         = IXDP2X01_CPLD_REGION_SIZE,
 139         .type           = MT_DEVICE
 140 };
 141
 142 static void __init ixdp2x01_map_io(void)
 143 {
 144         ixp2000_map_io();
 145         iotable_init(&ixdp2x01_io_desc, 1);
 146 }
 147
 148
 149 /*************************************************************************
 150  * IXDP2x01 serial ports
 151  *************************************************************************/
 152 static struct plat_serial8250_port ixdp2x01_serial_port1[] = {
 153         {
 154                 .mapbase        = (unsigned long)IXDP2X01_UART1_PHYS_BASE,
 155                 .membase        = (char *)IXDP2X01_UART1_VIRT_BASE,
 156                 .irq            = IRQ_IXDP2X01_UART1,
 157                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 158                 .iotype         = UPIO_MEM32,
 159                 .regshift       = 2,
 160                 .uartclk        = IXDP2X01_UART_CLK,
 161         },
 162         { }
 163 };
 164
 165 static struct resource ixdp2x01_uart_resource1 = {
 166         .start          = IXDP2X01_UART1_PHYS_BASE,
 167         .end            = IXDP2X01_UART1_PHYS_BASE + 0xffff,
 168         .flags          = IORESOURCE_MEM,
 169 };
 170
 171 static struct platform_device ixdp2x01_serial_device1 = {
 172         .name           = "serial8250",
 173         .id             = PLAT8250_DEV_PLATFORM1,
 174         .dev            = {
 175                 .platform_data          = ixdp2x01_serial_port1,
 176         },
 177         .num_resources  = 1,
 178         .resource       = &ixdp2x01_uart_resource1,
 179 };
 180
 181 static struct plat_serial8250_port ixdp2x01_serial_port2[] = {
 182         {
 183                 .mapbase        = (unsigned long)IXDP2X01_UART2_PHYS_BASE,
 184                 .membase        = (char *)IXDP2X01_UART2_VIRT_BASE,
 185                 .irq            = IRQ_IXDP2X01_UART2,
 186                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 187                 .iotype         = UPIO_MEM32,
 188                 .regshift       = 2,
 189                 .uartclk        = IXDP2X01_UART_CLK,
 190         },
 191         { }
 192 };
 193
 194 static struct resource ixdp2x01_uart_resource2 = {
 195         .start          = IXDP2X01_UART2_PHYS_BASE,
 196         .end            = IXDP2X01_UART2_PHYS_BASE + 0xffff,
 197         .flags          = IORESOURCE_MEM,
 198 };
 199
 200 static struct platform_device ixdp2x01_serial_device2 = {
 201         .name           = "serial8250",
 202         .id             = PLAT8250_DEV_PLATFORM2,
 203         .dev            = {
 204                 .platform_data          = ixdp2x01_serial_port2,
 205         },
 206         .num_resources  = 1,
 207         .resource       = &ixdp2x01_uart_resource2,
 208 };
 209
 210 static void ixdp2x01_uart_init(void)
 211 {
 212         platform_device_register(&ixdp2x01_serial_device1);
 213         platform_device_register(&ixdp2x01_serial_device2);
 214 }
 215
 216
 217 /*************************************************************************
 218  * IXDP2x01 timer tick configuration
 219  *************************************************************************/
 220 static unsigned int ixdp2x01_clock;
 221
 222 static int __init ixdp2x01_clock_setup(char *str)
 223 {
 224         ixdp2x01_clock = simple_strtoul(str, NULL, 10);
 225
 226         return 1;
 227 }
 228
 229 __setup("ixdp2x01_clock=", ixdp2x01_clock_setup);
 230
 231 static void __init ixdp2x01_timer_init(void)
 232 {
 233         if (!ixdp2x01_clock)
 234                 ixdp2x01_clock = 50000000;
 235
 236         ixp2000_init_time(ixdp2x01_clock);
 237 }
 238
 239 static struct sys_timer ixdp2x01_timer = {
 240         .init           = ixdp2x01_timer_init,
 241         .offset         = ixp2000_gettimeoffset,
 242 };
 243
 244 /*************************************************************************
 245  * IXDP2x01 PCI
 246  *************************************************************************/
 247 void __init ixdp2x01_pci_preinit(void)
 248 {
 249         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00000000);
 250         ixp2000_pci_preinit();
 251         pcibios_setup("firmware");
 252 }
 253
 254 #define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
 255
 256 static int __init ixdp2x01_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 257 {
 258         u8 bus = dev->bus->number;
 259         u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin);
 260         struct pci_bus *tmp_bus = dev->bus;
 261
 262         /* Primary bus, no interrupts here */
 263         if (bus == 0) {
 264                 return -1;
 265         }
 266
 267         /* Lookup first leaf in bus tree */
 268         while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL)) {
 269                 tmp_bus = tmp_bus->parent;
 270         }
 271
 272         /* Select between known bridges */
 273         switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) {
 274         /* Device is located after first MB bridge */
 275         case 0x0008:
 276                 if (tmp_bus == dev->bus) {
 277                         /* Device is located directly after first MB bridge */
 278                         switch (devpin) {
 279                         case DEVPIN(1, 1):      /* Onboard 82546 ch 0 */
 280                                 if (machine_is_ixdp2401())
 281                                         return IRQ_IXDP2401_INTA_82546;
 282                                 return -1;
 283                         case DEVPIN(1, 2):      /* Onboard 82546 ch 1 */
 284                                 if (machine_is_ixdp2401())
 285                                         return IRQ_IXDP2401_INTB_82546;
 286                                 return -1;
 287                         case DEVPIN(0, 1):      /* PMC INTA# */
 288                                 return IRQ_IXDP2X01_SPCI_PMC_INTA;
 289                         case DEVPIN(0, 2):      /* PMC INTB# */
 290                                 return IRQ_IXDP2X01_SPCI_PMC_INTB;
 291                         case DEVPIN(0, 3):      /* PMC INTC# */
 292                                 return IRQ_IXDP2X01_SPCI_PMC_INTC;
 293                         case DEVPIN(0, 4):      /* PMC INTD# */
 294                                 return IRQ_IXDP2X01_SPCI_PMC_INTD;
 295                         }
 296                 }
 297                 break;
 298         case 0x0010:
 299                 if (tmp_bus == dev->bus) {
 300                         /* Device is located directly after second MB bridge */
 301                         /* Secondary bus of second bridge */
 302                         switch (devpin) {
 303                         case DEVPIN(0, 1):      /* DB#0 */
 304                                 return IRQ_IXDP2X01_SPCI_DB_0;
 305                         case DEVPIN(1, 1):      /* DB#1 */
 306                                 return IRQ_IXDP2X01_SPCI_DB_1;
 307                         }
 308                 } else {
 309                         /* Device is located indirectly after second MB bridge */
 310                         /* Not supported now */
 311                 }
 312                 break;
 313         }
 314
 315         return -1;
 316 }
 317
 318
 319 static int ixdp2x01_pci_setup(int nr, struct pci_sys_data *sys)
 320 {
 321         sys->mem_offset = 0xe0000000;
 322
 323         if (machine_is_ixdp2801() || machine_is_ixdp28x5())
 324                 sys->mem_offset -= ((*IXP2000_PCI_ADDR_EXT & 0xE000) << 16);
 325
 326         return ixp2000_pci_setup(nr, sys);
 327 }
 328
 329 struct hw_pci ixdp2x01_pci __initdata = {
 330         .nr_controllers = 1,
 331         .setup          = ixdp2x01_pci_setup,
 332         .preinit        = ixdp2x01_pci_preinit,
 333         .scan           = ixp2000_pci_scan_bus,
 334         .map_irq        = ixdp2x01_pci_map_irq,
 335 };
 336
 337 int __init ixdp2x01_pci_init(void)
 338 {
 339         if (machine_is_ixdp2401() || machine_is_ixdp2801() ||\
 340                 machine_is_ixdp28x5())
 341                 pci_common_init(&ixdp2x01_pci);
 342
 343         return 0;
 344 }
 345
 346 subsys_initcall(ixdp2x01_pci_init);
 347
 348 /*************************************************************************
 349  * IXDP2x01 Machine Initialization
 350  *************************************************************************/
 351 static struct flash_platform_data ixdp2x01_flash_platform_data = {
 352         .map_name       = "cfi_probe",
 353         .width          = 1,
 354 };
 355
 356 static unsigned long ixdp2x01_flash_bank_setup(unsigned long ofs)
 357 {
 358         ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG,
 359                 ((ofs >> IXDP2X01_FLASH_WINDOW_BITS) | IXDP2X01_CPLD_FLASH_INTERN));
 360         return (ofs & IXDP2X01_FLASH_WINDOW_MASK);
 361 }
 362
 363 static struct ixp2000_flash_data ixdp2x01_flash_data = {
 364         .platform_data  = &ixdp2x01_flash_platform_data,
 365         .bank_setup     = ixdp2x01_flash_bank_setup
 366 };
 367
 368 static struct resource ixdp2x01_flash_resource = {
 369         .start          = 0xc4000000,
 370         .end            = 0xc4000000 + 0x01ffffff,
 371         .flags          = IORESOURCE_MEM,
 372 };
 373
 374 static struct platform_device ixdp2x01_flash = {
 375         .name           = "IXP2000-Flash",
 376         .id             = 0,
 377         .dev            = {
 378                 .platform_data = &ixdp2x01_flash_data,
 379         },
 380         .num_resources  = 1,
 381         .resource       = &ixdp2x01_flash_resource,
 382 };
 383
 384 static struct ixp2000_i2c_pins ixdp2x01_i2c_gpio_pins = {
 385         .sda_pin        = IXDP2X01_GPIO_SDA,
 386         .scl_pin        = IXDP2X01_GPIO_SCL,
 387 };
 388
 389 static struct platform_device ixdp2x01_i2c_controller = {
 390         .name           = "IXP2000-I2C",
 391         .id             = 0,
 392         .dev            = {
 393                 .platform_data = &ixdp2x01_i2c_gpio_pins,
 394         },
 395         .num_resources  = 0
 396 };
 397
 398 static struct platform_device *ixdp2x01_devices[] __initdata = {
 399         &ixdp2x01_flash,
 400         &ixdp2x01_i2c_controller
 401 };
 402
 403 static void __init ixdp2x01_init_machine(void)
 404 {
 405         ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG,
 406                 (IXDP2X01_CPLD_FLASH_BANK_MASK | IXDP2X01_CPLD_FLASH_INTERN));
 407
 408         ixdp2x01_flash_data.nr_banks =
 409                 ((*IXDP2X01_CPLD_FLASH_REG & IXDP2X01_CPLD_FLASH_BANK_MASK) + 1);
 410
 411         platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices));
 412         ixp2000_uart_init();
 413         ixdp2x01_uart_init();
 414 }
 415
 416
 417 #ifdef CONFIG_ARCH_IXDP2401
 418 MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform")
 419         /* Maintainer: MontaVista Software, Inc. */
 420         .phys_io        = IXP2000_UART_PHYS_BASE,
 421         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 422         .boot_params    = 0x00000100,
 423         .map_io         = ixdp2x01_map_io,
 424         .init_irq       = ixdp2x01_init_irq,
 425         .timer          = &ixdp2x01_timer,
 426         .init_machine   = ixdp2x01_init_machine,
 427 MACHINE_END
 428 #endif
 429
 430 #ifdef CONFIG_ARCH_IXDP2801
 431 MACHINE_START(IXDP2801, "Intel IXDP2801 Development Platform")
 432         /* Maintainer: MontaVista Software, Inc. */
 433         .phys_io        = IXP2000_UART_PHYS_BASE,
 434         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 435         .boot_params    = 0x00000100,
 436         .map_io         = ixdp2x01_map_io,
 437         .init_irq       = ixdp2x01_init_irq,
 438         .timer          = &ixdp2x01_timer,
 439         .init_machine   = ixdp2x01_init_machine,
 440 MACHINE_END
 441
 442 /*
 443  * IXDP28x5 is basically an IXDP2801 with a different CPU but Intel
 444  * changed the machine ID in the bootloader
 445  */
 446 MACHINE_START(IXDP28X5, "Intel IXDP2805/2855 Development Platform")
 447         /* Maintainer: MontaVista Software, Inc. */
 448         .phys_io        = IXP2000_UART_PHYS_BASE,
 449         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 450         .boot_params    = 0x00000100,
 451         .map_io         = ixdp2x01_map_io,
 452         .init_irq       = ixdp2x01_init_irq,
 453         .timer          = &ixdp2x01_timer,
 454         .init_machine   = ixdp2x01_init_machine,
 455 MACHINE_END
 456 #endif
 457
 458