LXR linux/arch/ppc/platforms/85xx/sbc8560.c

   1/*
   2 * Wind River SBC8560 board specific routines
   3 * 
   4 * Maintainer: Kumar Gala
   5 *
   6 * Copyright 2004 Freescale Semiconductor Inc.
   7 * 
   8 * This program is free software; you can redistribute  it and/or modify it
   9 * under  the terms of  the GNU General  Public License as published by the
  10 * Free Software Foundation;  either version 2 of the  License, or (at your
  11 * option) any later version.
  12 */
  13
  14#include <linux/stddef.h>
  15#include <linux/kernel.h>
  16#include <linux/init.h>
  17#include <linux/errno.h>
  18#include <linux/reboot.h>
  19#include <linux/pci.h>
  20#include <linux/kdev_t.h>
  21#include <linux/major.h>
  22#include <linux/console.h>
  23#include <linux/delay.h>
  24#include <linux/seq_file.h>
  25#include <linux/root_dev.h>
  26#include <linux/serial.h>
  27#include <linux/tty.h>  /* for linux/serial_core.h */
  28#include <linux/serial_core.h>
  29#include <linux/serial_8250.h>
  30#include <linux/initrd.h>
  31#include <linux/module.h>
  32#include <linux/fsl_devices.h>
  33
  34#include <asm/system.h>
  35#include <asm/pgtable.h>
  36#include <asm/page.h>
  37#include <asm/atomic.h>
  38#include <asm/time.h>
  39#include <asm/io.h>
  40#include <asm/machdep.h>
  41#include <asm/open_pic.h>
  42#include <asm/bootinfo.h>
  43#include <asm/pci-bridge.h>
  44#include <asm/mpc85xx.h>
  45#include <asm/irq.h>
  46#include <asm/immap_85xx.h>
  47#include <asm/kgdb.h>
  48#include <asm/ppc_sys.h>
  49#include <mm/mmu_decl.h>
  50
  51#include <syslib/ppc85xx_common.h>
  52#include <syslib/ppc85xx_setup.h>
  53
  54#ifdef CONFIG_SERIAL_8250
  55static void __init
  56sbc8560_early_serial_map(void)
  57{
  58        struct uart_port uart_req;
  59 
  60        /* Setup serial port access */
  61        memset(&uart_req, 0, sizeof (uart_req));
  62        uart_req.irq = MPC85xx_IRQ_EXT9;
  63        uart_req.flags = STD_COM_FLAGS;
  64        uart_req.uartclk = BASE_BAUD * 16;
  65        uart_req.iotype = UPIO_MEM;
  66        uart_req.mapbase = UARTA_ADDR;
  67        uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART0_SIZE);
  68        uart_req.type = PORT_16650;
  69
  70#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
  71        gen550_init(0, &uart_req);
  72#endif
  73 
  74        if (early_serial_setup(&uart_req) != 0)
  75                printk("Early serial init of port 0 failed\n");
  76 
  77        /* Assume early_serial_setup() doesn't modify uart_req */
  78        uart_req.line = 1;
  79        uart_req.mapbase = UARTB_ADDR;
  80        uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART1_SIZE);
  81        uart_req.irq = MPC85xx_IRQ_EXT10;
  82 
  83#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
  84        gen550_init(1, &uart_req);
  85#endif
  86 
  87        if (early_serial_setup(&uart_req) != 0)
  88                printk("Early serial init of port 1 failed\n");
  89}
  90#endif
  91
  92/* ************************************************************************
  93 *
  94 * Setup the architecture
  95 *
  96 */
  97static void __init
  98sbc8560_setup_arch(void)
  99{
 100        bd_t *binfo = (bd_t *) __res;
 101        unsigned int freq;
 102        struct gianfar_platform_data *pdata;
 103        struct gianfar_mdio_data *mdata;
 104
 105        /* get the core frequency */
 106        freq = binfo->bi_intfreq;
 107
 108        if (ppc_md.progress)
 109                ppc_md.progress("sbc8560_setup_arch()", 0);
 110
 111        /* Set loops_per_jiffy to a half-way reasonable value,
 112           for use until calibrate_delay gets called. */
 113        loops_per_jiffy = freq / HZ;
 114
 115#ifdef CONFIG_PCI
 116        /* setup PCI host bridges */
 117        mpc85xx_setup_hose();
 118#endif
 119#ifdef CONFIG_SERIAL_8250
 120        sbc8560_early_serial_map();
 121#endif
 122#ifdef CONFIG_SERIAL_TEXT_DEBUG
 123        /* Invalidate the entry we stole earlier the serial ports
 124         * should be properly mapped */ 
 125        invalidate_tlbcam_entry(num_tlbcam_entries - 1);
 126#endif
 127
 128        /* setup the board related info for the MDIO bus */
 129        mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);
 130
 131        mdata->irq[25] = MPC85xx_IRQ_EXT6;
 132        mdata->irq[26] = MPC85xx_IRQ_EXT7;
 133        mdata->irq[31] = PHY_POLL;
 134
 135        /* setup the board related information for the enet controllers */
 136        pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
 137        if (pdata) {
 138                pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 139                pdata->bus_id = 0;
 140                pdata->phy_id = 25;
 141                memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
 142        }
 143
 144        pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
 145        if (pdata) {
 146                pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 147                pdata->bus_id = 0;
 148                pdata->phy_id = 26;
 149                memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
 150        }
 151
 152#ifdef CONFIG_BLK_DEV_INITRD
 153        if (initrd_start)
 154                ROOT_DEV = Root_RAM0;
 155        else
 156#endif
 157#ifdef  CONFIG_ROOT_NFS
 158                ROOT_DEV = Root_NFS;
 159#else
 160                ROOT_DEV = Root_HDA1;
 161#endif
 162}
 163
 164/* ************************************************************************ */
 165void __init
 166platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 167              unsigned long r6, unsigned long r7)
 168{
 169        /* parse_bootinfo must always be called first */
 170        parse_bootinfo(find_bootinfo());
 171
 172        /*
 173         * If we were passed in a board information, copy it into the
 174         * residual data area.
 175         */
 176        if (r3) {
 177                memcpy((void *) __res, (void *) (r3 + KERNELBASE),
 178                       sizeof (bd_t));
 179        }
 180
 181#ifdef CONFIG_SERIAL_TEXT_DEBUG
 182        /* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
 183        settlbcam(num_tlbcam_entries - 1, UARTA_ADDR,
 184                  UARTA_ADDR, 0x1000, _PAGE_IO, 0);
 185#endif
 186
 187#if defined(CONFIG_BLK_DEV_INITRD)
 188        /*
 189         * If the init RAM disk has been configured in, and there's a valid
 190         * starting address for it, set it up.
 191         */
 192        if (r4) {
 193                initrd_start = r4 + KERNELBASE;
 194                initrd_end = r5 + KERNELBASE;
 195        }
 196#endif                          /* CONFIG_BLK_DEV_INITRD */
 197
 198        /* Copy the kernel command line arguments to a safe place. */
 199
 200        if (r6) {
 201                *(char *) (r7 + KERNELBASE) = 0;
 202                strcpy(cmd_line, (char *) (r6 + KERNELBASE));
 203        }
 204
 205        identify_ppc_sys_by_id(mfspr(SPRN_SVR));
 206
 207        /* setup the PowerPC module struct */
 208        ppc_md.setup_arch = sbc8560_setup_arch;
 209        ppc_md.show_cpuinfo = sbc8560_show_cpuinfo;
 210
 211        ppc_md.init_IRQ = sbc8560_init_IRQ;
 212        ppc_md.get_irq = openpic_get_irq;
 213
 214        ppc_md.restart = mpc85xx_restart;
 215        ppc_md.power_off = mpc85xx_power_off;
 216        ppc_md.halt = mpc85xx_halt;
 217
 218        ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
 219
 220        ppc_md.time_init = NULL;
 221        ppc_md.set_rtc_time = NULL;
 222        ppc_md.get_rtc_time = NULL;
 223        ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
 224
 225#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
 226        ppc_md.progress = gen550_progress;
 227#endif  /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
 228#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
 229        ppc_md.early_serial_map = sbc8560_early_serial_map;
 230#endif  /* CONFIG_SERIAL_8250 && CONFIG_KGDB */
 231
 232        if (ppc_md.progress)
 233                ppc_md.progress("sbc8560_init(): exit", 0);
 234}
 235