arch/ppc/platforms/4xx/yucca.c

   1 /*
   2  * Yucca board specific routines
   3  *
   4  * Roland Dreier <rolandd@cisco.com> (based on luan.c by Matt Porter)
   5  *
   6  * Copyright 2004-2005 MontaVista Software Inc.
   7  * Copyright (c) 2005 Cisco Systems.  All rights reserved.
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/reboot.h>
  20 #include <linux/pci.h>
  21 #include <linux/kdev_t.h>
  22 #include <linux/types.h>
  23 #include <linux/major.h>
  24 #include <linux/blkdev.h>
  25 #include <linux/console.h>
  26 #include <linux/delay.h>
  27 #include <linux/ide.h>
  28 #include <linux/initrd.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/tty.h>
  32 #include <linux/serial.h>
  33 #include <linux/serial_core.h>
  34 #include <linux/serial_8250.h>
  35
  36 #include <asm/system.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/page.h>
  39 #include <asm/dma.h>
  40 #include <asm/io.h>
  41 #include <asm/machdep.h>
  42 #include <asm/ocp.h>
  43 #include <asm/pci-bridge.h>
  44 #include <asm/time.h>
  45 #include <asm/todc.h>
  46 #include <asm/bootinfo.h>
  47 #include <asm/ppc4xx_pic.h>
  48 #include <asm/ppcboot.h>
  49
  50 #include <syslib/ibm44x_common.h>
  51 #include <syslib/ibm440gx_common.h>
  52 #include <syslib/ibm440sp_common.h>
  53 #include <syslib/ppc440spe_pcie.h>
  54
  55 extern bd_t __res;
  56
  57 static struct ibm44x_clocks clocks __initdata;
  58
  59 static void __init
  60 yucca_calibrate_decr(void)
  61 {
  62         unsigned int freq;
  63
  64         if (mfspr(SPRN_CCR1) & CCR1_TCS)
  65                 freq = YUCCA_TMR_CLK;
  66         else
  67                 freq = clocks.cpu;
  68
  69         ibm44x_calibrate_decr(freq);
  70 }
  71
  72 static int
  73 yucca_show_cpuinfo(struct seq_file *m)
  74 {
  75         seq_printf(m, "vendor\t\t: AMCC\n");
  76         seq_printf(m, "machine\t\t: PPC440SPe EVB (Yucca)\n");
  77
  78         return 0;
  79 }
  80
  81 static enum {
  82         HOSE_UNKNOWN,
  83         HOSE_PCIX,
  84         HOSE_PCIE0,
  85         HOSE_PCIE1,
  86         HOSE_PCIE2
  87 } hose_type[4];
  88
  89 static inline int
  90 yucca_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
  91 {
  92         struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
  93
  94         if (hose_type[hose->index] == HOSE_PCIX) {
  95                 static char pci_irq_table[][4] =
  96                 /*
  97                  *      PCI IDSEL/INTPIN->INTLINE
  98                  *        A   B   C   D
  99                  */
 100                 {
 101                         { 81, -1, -1, -1 },     /* IDSEL 1 - PCIX0 Slot 0 */
 102                 };
 103                 const long min_idsel = 1, max_idsel = 1, irqs_per_slot = 4;
 104                 return PCI_IRQ_TABLE_LOOKUP;
 105         } else if (hose_type[hose->index] == HOSE_PCIE0) {
 106                 static char pci_irq_table[][4] =
 107                 /*
 108                  *      PCI IDSEL/INTPIN->INTLINE
 109                  *        A   B   C   D
 110                  */
 111                 {
 112                         { 96, 97, 98, 99 },
 113                 };
 114                 const long min_idsel = 1, max_idsel = 1, irqs_per_slot = 4;
 115                 return PCI_IRQ_TABLE_LOOKUP;
 116         } else if (hose_type[hose->index] == HOSE_PCIE1) {
 117                 static char pci_irq_table[][4] =
 118                 /*
 119                  *      PCI IDSEL/INTPIN->INTLINE
 120                  *        A   B   C   D
 121                  */
 122                 {
 123                         { 100, 101, 102, 103 },
 124                 };
 125                 const long min_idsel = 1, max_idsel = 1, irqs_per_slot = 4;
 126                 return PCI_IRQ_TABLE_LOOKUP;
 127         } else if (hose_type[hose->index] == HOSE_PCIE2) {
 128                 static char pci_irq_table[][4] =
 129                 /*
 130                  *      PCI IDSEL/INTPIN->INTLINE
 131                  *        A   B   C   D
 132                  */
 133                 {
 134                         { 104, 105, 106, 107 },
 135                 };
 136                 const long min_idsel = 1, max_idsel = 1, irqs_per_slot = 4;
 137                 return PCI_IRQ_TABLE_LOOKUP;
 138         }
 139         return -1;
 140 }
 141
 142 static void __init yucca_set_emacdata(void)
 143 {
 144         struct ocp_def *def;
 145         struct ocp_func_emac_data *emacdata;
 146
 147         /* Set phy_map, phy_mode, and mac_addr for the EMAC */
 148         def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
 149         emacdata = def->additions;
 150         emacdata->phy_map = 0x00000001; /* Skip 0x00 */
 151         emacdata->phy_mode = PHY_MODE_GMII;
 152         memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
 153 }
 154
 155 static int __init yucca_pcie_card_present(int port)
 156 {
 157    void __iomem *pcie_fpga_base;
 158    u16 reg;
 159
 160    pcie_fpga_base = ioremap64(YUCCA_FPGA_REG_BASE, YUCCA_FPGA_REG_SIZE);
 161    reg = in_be16(pcie_fpga_base + FPGA_REG1C);
 162    iounmap(pcie_fpga_base);
 163
 164    switch(port) {
 165    case 0: return !(reg & FPGA_REG1C_PE0_PRSNT);
 166    case 1: return !(reg & FPGA_REG1C_PE1_PRSNT);
 167    case 2: return !(reg & FPGA_REG1C_PE2_PRSNT);
 168    default: return 0;
 169    }
 170 }
 171
 172 /*
 173  * For the given slot, set rootpoint mode, send power to the slot,
 174  * turn on the green LED and turn off the yellow LED, enable the clock
 175  * and turn off reset.
 176  */
 177 static void __init yucca_setup_pcie_fpga_rootpoint(int port)
 178 {
 179         void __iomem *pcie_reg_fpga_base;
 180         u16 power, clock, green_led, yellow_led, reset_off, rootpoint, endpoint;
 181
 182         pcie_reg_fpga_base = ioremap64(YUCCA_FPGA_REG_BASE, YUCCA_FPGA_REG_SIZE);
 183
 184         switch(port) {
 185         case 0:
 186                 rootpoint   = FPGA_REG1C_PE0_ROOTPOINT;
 187                 endpoint    = 0;
 188                 power       = FPGA_REG1A_PE0_PWRON;
 189                 green_led   = FPGA_REG1A_PE0_GLED;
 190                 clock       = FPGA_REG1A_PE0_REFCLK_ENABLE;
 191                 yellow_led  = FPGA_REG1A_PE0_YLED;
 192                 reset_off   = FPGA_REG1C_PE0_PERST;
 193                 break;
 194         case 1:
 195                 rootpoint   = 0;
 196                 endpoint    = FPGA_REG1C_PE1_ENDPOINT;
 197                 power       = FPGA_REG1A_PE1_PWRON;
 198                 green_led   = FPGA_REG1A_PE1_GLED;
 199                 clock       = FPGA_REG1A_PE1_REFCLK_ENABLE;
 200                 yellow_led  = FPGA_REG1A_PE1_YLED;
 201                 reset_off   = FPGA_REG1C_PE1_PERST;
 202                 break;
 203         case 2:
 204                 rootpoint   = 0;
 205                 endpoint    = FPGA_REG1C_PE2_ENDPOINT;
 206                 power       = FPGA_REG1A_PE2_PWRON;
 207                 green_led   = FPGA_REG1A_PE2_GLED;
 208                 clock       = FPGA_REG1A_PE2_REFCLK_ENABLE;
 209                 yellow_led  = FPGA_REG1A_PE2_YLED;
 210                 reset_off   = FPGA_REG1C_PE2_PERST;
 211                 break;
 212
 213         default:
 214                 iounmap(pcie_reg_fpga_base);
 215                 return;
 216         }
 217
 218         out_be16(pcie_reg_fpga_base + FPGA_REG1A,
 219                  ~(power | clock | green_led) &
 220                  (yellow_led | in_be16(pcie_reg_fpga_base + FPGA_REG1A)));
 221         out_be16(pcie_reg_fpga_base + FPGA_REG1C,
 222                  ~(endpoint | reset_off) &
 223                  (rootpoint | in_be16(pcie_reg_fpga_base + FPGA_REG1C)));
 224
 225         /*
 226          * Leave device in reset for a while after powering on the
 227          * slot to give it a chance to initialize.
 228          */
 229         mdelay(250);
 230
 231         out_be16(pcie_reg_fpga_base + FPGA_REG1C,
 232                  reset_off | in_be16(pcie_reg_fpga_base + FPGA_REG1C));
 233
 234         iounmap(pcie_reg_fpga_base);
 235 }
 236
 237 static void __init
 238 yucca_setup_hoses(void)
 239 {
 240         struct pci_controller *hose;
 241         char name[20];
 242         int i;
 243
 244         if (0 && ppc440spe_init_pcie()) {
 245                 printk(KERN_WARNING "PPC440SPe PCI Express initialization failed\n");
 246                 return;
 247         }
 248
 249         for (i = 0; i <= 2; ++i) {
 250                 if (!yucca_pcie_card_present(i))
 251                         continue;
 252
 253                 printk(KERN_INFO "PCIE%d: card present\n", i);
 254                 yucca_setup_pcie_fpga_rootpoint(i);
 255                 if (ppc440spe_init_pcie_rootport(i)) {
 256                         printk(KERN_WARNING "PCIE%d: initialization failed\n", i);
 257                         continue;
 258                 }
 259
 260                 hose = pcibios_alloc_controller();
 261                 if (!hose)
 262                         return;
 263
 264                 sprintf(name, "PCIE%d host bridge", i);
 265                 pci_init_resource(&hose->io_resource,
 266                                   YUCCA_PCIX_LOWER_IO,
 267                                   YUCCA_PCIX_UPPER_IO,
 268                                   IORESOURCE_IO,
 269                                   name);
 270
 271                 hose->mem_space.start = YUCCA_PCIE_LOWER_MEM +
 272                         i * YUCCA_PCIE_MEM_SIZE;
 273                 hose->mem_space.end   = hose->mem_space.start +
 274                         YUCCA_PCIE_MEM_SIZE - 1;
 275
 276                 pci_init_resource(&hose->mem_resources[0],
 277                                   hose->mem_space.start,
 278                                   hose->mem_space.end,
 279                                   IORESOURCE_MEM,
 280                                   name);
 281
 282                 hose->first_busno = 0;
 283                 hose->last_busno  = 15;
 284                 hose_type[hose->index] = HOSE_PCIE0 + i;
 285
 286                 ppc440spe_setup_pcie(hose, i);
 287                 hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
 288         }
 289
 290         ppc_md.pci_swizzle = common_swizzle;
 291         ppc_md.pci_map_irq = yucca_map_irq;
 292 }
 293
 294 TODC_ALLOC();
 295
 296 static void __init
 297 yucca_early_serial_map(void)
 298 {
 299         struct uart_port port;
 300
 301         /* Setup ioremapped serial port access */
 302         memset(&port, 0, sizeof(port));
 303         port.membase = ioremap64(PPC440SPE_UART0_ADDR, 8);
 304         port.irq = UART0_INT;
 305         port.uartclk = clocks.uart0;
 306         port.regshift = 0;
 307         port.iotype = UPIO_MEM;
 308         port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
 309         port.line = 0;
 310
 311         if (early_serial_setup(&port) != 0) {
 312                 printk("Early serial init of port 0 failed\n");
 313         }
 314
 315         port.membase = ioremap64(PPC440SPE_UART1_ADDR, 8);
 316         port.irq = UART1_INT;
 317         port.uartclk = clocks.uart1;
 318         port.line = 1;
 319
 320         if (early_serial_setup(&port) != 0) {
 321                 printk("Early serial init of port 1 failed\n");
 322         }
 323
 324         port.membase = ioremap64(PPC440SPE_UART2_ADDR, 8);
 325         port.irq = UART2_INT;
 326         port.uartclk = BASE_BAUD;
 327         port.line = 2;
 328
 329         if (early_serial_setup(&port) != 0) {
 330                 printk("Early serial init of port 2 failed\n");
 331         }
 332 }
 333
 334 static void __init
 335 yucca_setup_arch(void)
 336 {
 337         yucca_set_emacdata();
 338
 339 #if !defined(CONFIG_BDI_SWITCH)
 340         /*
 341          * The Abatron BDI JTAG debugger does not tolerate others
 342          * mucking with the debug registers.
 343          */
 344         mtspr(SPRN_DBCR0, (DBCR0_TDE | DBCR0_IDM));
 345 #endif
 346
 347         /*
 348          * Determine various clocks.
 349          * To be completely correct we should get SysClk
 350          * from FPGA, because it can be changed by on-board switches
 351          * --ebs
 352          */
 353         /* 440GX and 440SPe clocking is the same - rd */
 354         ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
 355         ocp_sys_info.opb_bus_freq = clocks.opb;
 356
 357         /* init to some ~sane value until calibrate_delay() runs */
 358         loops_per_jiffy = 50000000/HZ;
 359
 360         /* Setup PCIXn host bridges */
 361         yucca_setup_hoses();
 362
 363 #ifdef CONFIG_BLK_DEV_INITRD
 364         if (initrd_start)
 365                 ROOT_DEV = Root_RAM0;
 366         else
 367 #endif
 368 #ifdef CONFIG_ROOT_NFS
 369                 ROOT_DEV = Root_NFS;
 370 #else
 371                 ROOT_DEV = Root_HDA1;
 372 #endif
 373
 374         yucca_early_serial_map();
 375
 376         /* Identify the system */
 377         printk("Yucca port (Roland Dreier <rolandd@cisco.com>)\n");
 378 }
 379
 380 void __init platform_init(unsigned long r3, unsigned long r4,
 381                 unsigned long r5, unsigned long r6, unsigned long r7)
 382 {
 383         ibm44x_platform_init(r3, r4, r5, r6, r7);
 384
 385         ppc_md.setup_arch = yucca_setup_arch;
 386         ppc_md.show_cpuinfo = yucca_show_cpuinfo;
 387         ppc_md.find_end_of_memory = ibm440sp_find_end_of_memory;
 388         ppc_md.get_irq = NULL;          /* Set in ppc4xx_pic_init() */
 389
 390         ppc_md.calibrate_decr = yucca_calibrate_decr;
 391 #ifdef CONFIG_KGDB
 392         ppc_md.early_serial_map = yucca_early_serial_map;
 393 #endif
 394 }