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
  55 static void __init
  56 sbc8560_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  */
  97 static void __init
  98 sbc8560_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 /* ************************************************************************ */
 165 void __init
 166 platform_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 }