release/src-rt-6.x/linux/linux-2.6/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/initrd.h>
  30 #include <linux/module.h>
  31 #include <linux/fsl_devices.h>
  32
  33 #include <asm/system.h>
  34 #include <asm/pgtable.h>
  35 #include <asm/page.h>
  36 #include <asm/atomic.h>
  37 #include <asm/time.h>
  38 #include <asm/io.h>
  39 #include <asm/machdep.h>
  40 #include <asm/open_pic.h>
  41 #include <asm/bootinfo.h>
  42 #include <asm/pci-bridge.h>
  43 #include <asm/mpc85xx.h>
  44 #include <asm/irq.h>
  45 #include <asm/immap_85xx.h>
  46 #include <asm/kgdb.h>
  47 #include <asm/ppc_sys.h>
  48 #include <mm/mmu_decl.h>
  49
  50 #include <syslib/ppc85xx_common.h>
  51 #include <syslib/ppc85xx_setup.h>
  52
  53 #ifdef CONFIG_SERIAL_8250
  54 static void __init
  55 sbc8560_early_serial_map(void)
  56 {
  57         struct uart_port uart_req;
  58
  59         /* Setup serial port access */
  60         memset(&uart_req, 0, sizeof (uart_req));
  61         uart_req.irq = MPC85xx_IRQ_EXT9;
  62         uart_req.flags = STD_COM_FLAGS;
  63         uart_req.uartclk = BASE_BAUD * 16;
  64         uart_req.iotype = UPIO_MEM;
  65         uart_req.mapbase = UARTA_ADDR;
  66         uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART0_SIZE);
  67         uart_req.type = PORT_16650;
  68
  69 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
  70         gen550_init(0, &uart_req);
  71 #endif
  72
  73         if (early_serial_setup(&uart_req) != 0)
  74                 printk("Early serial init of port 0 failed\n");
  75
  76         /* Assume early_serial_setup() doesn't modify uart_req */
  77         uart_req.line = 1;
  78         uart_req.mapbase = UARTB_ADDR;
  79         uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART1_SIZE);
  80         uart_req.irq = MPC85xx_IRQ_EXT10;
  81
  82 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
  83         gen550_init(1, &uart_req);
  84 #endif
  85
  86         if (early_serial_setup(&uart_req) != 0)
  87                 printk("Early serial init of port 1 failed\n");
  88 }
  89 #endif
  90
  91 /* ************************************************************************
  92  *
  93  * Setup the architecture
  94  *
  95  */
  96 static void __init
  97 sbc8560_setup_arch(void)
  98 {
  99         bd_t *binfo = (bd_t *) __res;
 100         unsigned int freq;
 101         struct gianfar_platform_data *pdata;
 102         struct gianfar_mdio_data *mdata;
 103
 104         /* get the core frequency */
 105         freq = binfo->bi_intfreq;
 106
 107         if (ppc_md.progress)
 108                 ppc_md.progress("sbc8560_setup_arch()", 0);
 109
 110         /* Set loops_per_jiffy to a half-way reasonable value,
 111            for use until calibrate_delay gets called. */
 112         loops_per_jiffy = freq / HZ;
 113
 114 #ifdef CONFIG_PCI
 115         /* setup PCI host bridges */
 116         mpc85xx_setup_hose();
 117 #endif
 118 #ifdef CONFIG_SERIAL_8250
 119         sbc8560_early_serial_map();
 120 #endif
 121 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 122         /* Invalidate the entry we stole earlier the serial ports
 123          * should be properly mapped */
 124         invalidate_tlbcam_entry(num_tlbcam_entries - 1);
 125 #endif
 126
 127         /* setup the board related info for the MDIO bus */
 128         mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);
 129
 130         mdata->irq[25] = MPC85xx_IRQ_EXT6;
 131         mdata->irq[26] = MPC85xx_IRQ_EXT7;
 132         mdata->irq[31] = PHY_POLL;
 133
 134         /* setup the board related information for the enet controllers */
 135         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
 136         if (pdata) {
 137                 pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 138                 pdata->bus_id = 0;
 139                 pdata->phy_id = 25;
 140                 memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
 141         }
 142
 143         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
 144         if (pdata) {
 145                 pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 146                 pdata->bus_id = 0;
 147                 pdata->phy_id = 26;
 148                 memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
 149         }
 150
 151 #ifdef CONFIG_BLK_DEV_INITRD
 152         if (initrd_start)
 153                 ROOT_DEV = Root_RAM0;
 154         else
 155 #endif
 156 #ifdef  CONFIG_ROOT_NFS
 157                 ROOT_DEV = Root_NFS;
 158 #else
 159                 ROOT_DEV = Root_HDA1;
 160 #endif
 161 }
 162
 163 /* ************************************************************************ */
 164 void __init
 165 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 166               unsigned long r6, unsigned long r7)
 167 {
 168         /* parse_bootinfo must always be called first */
 169         parse_bootinfo(find_bootinfo());
 170
 171         /*
 172          * If we were passed in a board information, copy it into the
 173          * residual data area.
 174          */
 175         if (r3) {
 176                 memcpy((void *) __res, (void *) (r3 + KERNELBASE),
 177                        sizeof (bd_t));
 178         }
 179
 180 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 181         /* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
 182         settlbcam(num_tlbcam_entries - 1, UARTA_ADDR,
 183                   UARTA_ADDR, 0x1000, _PAGE_IO, 0);
 184 #endif
 185
 186 #if defined(CONFIG_BLK_DEV_INITRD)
 187         /*
 188          * If the init RAM disk has been configured in, and there's a valid
 189          * starting address for it, set it up.
 190          */
 191         if (r4) {
 192                 initrd_start = r4 + KERNELBASE;
 193                 initrd_end = r5 + KERNELBASE;
 194         }
 195 #endif                          /* CONFIG_BLK_DEV_INITRD */
 196
 197         /* Copy the kernel command line arguments to a safe place. */
 198
 199         if (r6) {
 200                 *(char *) (r7 + KERNELBASE) = 0;
 201                 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
 202         }
 203
 204         identify_ppc_sys_by_id(mfspr(SPRN_SVR));
 205
 206         /* setup the PowerPC module struct */
 207         ppc_md.setup_arch = sbc8560_setup_arch;
 208         ppc_md.show_cpuinfo = sbc8560_show_cpuinfo;
 209
 210         ppc_md.init_IRQ = sbc8560_init_IRQ;
 211         ppc_md.get_irq = openpic_get_irq;
 212
 213         ppc_md.restart = mpc85xx_restart;
 214         ppc_md.power_off = mpc85xx_power_off;
 215         ppc_md.halt = mpc85xx_halt;
 216
 217         ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
 218
 219         ppc_md.time_init = NULL;
 220         ppc_md.set_rtc_time = NULL;
 221         ppc_md.get_rtc_time = NULL;
 222         ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
 223
 224 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
 225         ppc_md.progress = gen550_progress;
 226 #endif  /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
 227 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
 228         ppc_md.early_serial_map = sbc8560_early_serial_map;
 229 #endif  /* CONFIG_SERIAL_8250 && CONFIG_KGDB */
 230
 231         if (ppc_md.progress)
 232                 ppc_md.progress("sbc8560_init(): exit", 0);
 233 }