arch/ppc/platforms/85xx/mpc8540_ads.c

   1 /*
   2  * arch/ppc/platforms/85xx/mpc8540_ads.c
   3  *
   4  * MPC8540ADS board specific routines
   5  *
   6  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
   7  *
   8  * Copyright 2004 Freescale Semiconductor Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/stddef.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/reboot.h>
  22 #include <linux/pci.h>
  23 #include <linux/kdev_t.h>
  24 #include <linux/major.h>
  25 #include <linux/console.h>
  26 #include <linux/delay.h>
  27 #include <linux/seq_file.h>
  28 #include <linux/root_dev.h>
  29 #include <linux/serial.h>
  30 #include <linux/tty.h>  /* for linux/serial_core.h */
  31 #include <linux/serial_core.h>
  32 #include <linux/initrd.h>
  33 #include <linux/module.h>
  34 #include <linux/fsl_devices.h>
  35
  36 #include <asm/system.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/page.h>
  39 #include <asm/atomic.h>
  40 #include <asm/time.h>
  41 #include <asm/io.h>
  42 #include <asm/machdep.h>
  43 #include <asm/open_pic.h>
  44 #include <asm/bootinfo.h>
  45 #include <asm/pci-bridge.h>
  46 #include <asm/mpc85xx.h>
  47 #include <asm/irq.h>
  48 #include <asm/immap_85xx.h>
  49 #include <asm/kgdb.h>
  50 #include <asm/ppc_sys.h>
  51 #include <mm/mmu_decl.h>
  52
  53 #include <syslib/ppc85xx_setup.h>
  54
  55 static const char *GFAR_PHY_0 = "phy0:0";
  56 static const char *GFAR_PHY_1 = "phy0:1";
  57 static const char *GFAR_PHY_3 = "phy0:3";
  58
  59 /* ************************************************************************
  60  *
  61  * Setup the architecture
  62  *
  63  */
  64 static void __init
  65 mpc8540ads_setup_arch(void)
  66 {
  67         bd_t *binfo = (bd_t *) __res;
  68         unsigned int freq;
  69         struct gianfar_platform_data *pdata;
  70         struct gianfar_mdio_data *mdata;
  71
  72         /* get the core frequency */
  73         freq = binfo->bi_intfreq;
  74
  75         if (ppc_md.progress)
  76                 ppc_md.progress("mpc8540ads_setup_arch()", 0);
  77
  78         /* Set loops_per_jiffy to a half-way reasonable value,
  79            for use until calibrate_delay gets called. */
  80         loops_per_jiffy = freq / HZ;
  81
  82 #ifdef CONFIG_PCI
  83         /* setup PCI host bridges */
  84         mpc85xx_setup_hose();
  85 #endif
  86
  87 #ifdef CONFIG_SERIAL_8250
  88         mpc85xx_early_serial_map();
  89 #endif
  90
  91 #ifdef CONFIG_SERIAL_TEXT_DEBUG
  92         /* Invalidate the entry we stole earlier the serial ports
  93          * should be properly mapped */
  94         invalidate_tlbcam_entry(num_tlbcam_entries - 1);
  95 #endif
  96
  97         /* setup the board related info for the MDIO bus */
  98         mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);
  99
 100         mdata->irq[0] = MPC85xx_IRQ_EXT5;
 101         mdata->irq[1] = MPC85xx_IRQ_EXT5;
 102         mdata->irq[2] = -1;
 103         mdata->irq[3] = MPC85xx_IRQ_EXT5;
 104         mdata->irq[31] = -1;
 105         mdata->paddr += binfo->bi_immr_base;
 106
 107         /* setup the board related information for the enet controllers */
 108         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
 109         if (pdata) {
 110                 pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 111                 pdata->bus_id = GFAR_PHY_0;
 112                 memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
 113         }
 114
 115         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
 116         if (pdata) {
 117                 pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
 118                 pdata->bus_id = GFAR_PHY_1;
 119                 memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
 120         }
 121
 122         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_FEC);
 123         if (pdata) {
 124                 pdata->board_flags = 0;
 125                 pdata->bus_id = GFAR_PHY_3;
 126                 memcpy(pdata->mac_addr, binfo->bi_enet2addr, 6);
 127         }
 128
 129 #ifdef CONFIG_BLK_DEV_INITRD
 130         if (initrd_start)
 131                 ROOT_DEV = Root_RAM0;
 132         else
 133 #endif
 134 #ifdef  CONFIG_ROOT_NFS
 135                 ROOT_DEV = Root_NFS;
 136 #else
 137                 ROOT_DEV = Root_HDA1;
 138 #endif
 139 }
 140
 141 /* ************************************************************************ */
 142 void __init
 143 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 144               unsigned long r6, unsigned long r7)
 145 {
 146         /* parse_bootinfo must always be called first */
 147         parse_bootinfo(find_bootinfo());
 148
 149         /*
 150          * If we were passed in a board information, copy it into the
 151          * residual data area.
 152          */
 153         if (r3) {
 154                 memcpy((void *) __res, (void *) (r3 + KERNELBASE),
 155                        sizeof (bd_t));
 156         }
 157 #ifdef CONFIG_SERIAL_TEXT_DEBUG
 158         {
 159                 bd_t *binfo = (bd_t *) __res;
 160                 struct uart_port p;
 161
 162                 /* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
 163                 settlbcam(num_tlbcam_entries - 1, binfo->bi_immr_base,
 164                           binfo->bi_immr_base, MPC85xx_CCSRBAR_SIZE, _PAGE_IO, 0);
 165
 166                 memset(&p, 0, sizeof (p));
 167                 p.iotype = SERIAL_IO_MEM;
 168                 p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART0_OFFSET;
 169                 p.uartclk = binfo->bi_busfreq;
 170
 171                 gen550_init(0, &p);
 172
 173                 memset(&p, 0, sizeof (p));
 174                 p.iotype = SERIAL_IO_MEM;
 175                 p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART1_OFFSET;
 176                 p.uartclk = binfo->bi_busfreq;
 177
 178                 gen550_init(1, &p);
 179         }
 180 #endif
 181
 182 #if defined(CONFIG_BLK_DEV_INITRD)
 183         /*
 184          * If the init RAM disk has been configured in, and there's a valid
 185          * starting address for it, set it up.
 186          */
 187         if (r4) {
 188                 initrd_start = r4 + KERNELBASE;
 189                 initrd_end = r5 + KERNELBASE;
 190         }
 191 #endif                          /* CONFIG_BLK_DEV_INITRD */
 192
 193         /* Copy the kernel command line arguments to a safe place. */
 194
 195         if (r6) {
 196                 *(char *) (r7 + KERNELBASE) = 0;
 197                 strcpy(cmd_line, (char *) (r6 + KERNELBASE));
 198         }
 199
 200         identify_ppc_sys_by_id(mfspr(SPRN_SVR));
 201
 202         /* setup the PowerPC module struct */
 203         ppc_md.setup_arch = mpc8540ads_setup_arch;
 204         ppc_md.show_cpuinfo = mpc85xx_ads_show_cpuinfo;
 205
 206         ppc_md.init_IRQ = mpc85xx_ads_init_IRQ;
 207         ppc_md.get_irq = openpic_get_irq;
 208
 209         ppc_md.restart = mpc85xx_restart;
 210         ppc_md.power_off = mpc85xx_power_off;
 211         ppc_md.halt = mpc85xx_halt;
 212
 213         ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
 214
 215         ppc_md.time_init = NULL;
 216         ppc_md.set_rtc_time = NULL;
 217         ppc_md.get_rtc_time = NULL;
 218         ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
 219
 220 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
 221         ppc_md.progress = gen550_progress;
 222 #endif  /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
 223 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
 224         ppc_md.early_serial_map = mpc85xx_early_serial_map;
 225 #endif  /* CONFIG_SERIAL_8250 && CONFIG_KGDB */
 226
 227         if (ppc_md.progress)
 228                 ppc_md.progress("mpc8540ads_init(): exit", 0);
 229
 230         return;
 231 }