linux/arch/powerpc/platforms/85xx/ksi8560.c
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   1/*
   2 * Board setup routines for the Emerson KSI8560
   3 *
   4 * Author: Alexandr Smirnov <asmirnov@ru.mvista.com>
   5 *
   6 * Based on mpc85xx_ads.c maintained by Kumar Gala
   7 *
   8 * 2008 (c) MontaVista, Software, Inc.  This file is licensed under
   9 * the terms of the GNU General Public License version 2.  This program
  10 * is licensed "as is" without any warranty of any kind, whether express
  11 * or implied.
  12 *
  13 */
  14
  15#include <linux/stddef.h>
  16#include <linux/kernel.h>
  17#include <linux/pci.h>
  18#include <linux/kdev_t.h>
  19#include <linux/delay.h>
  20#include <linux/seq_file.h>
  21#include <linux/of_platform.h>
  22
  23#include <asm/system.h>
  24#include <asm/time.h>
  25#include <asm/machdep.h>
  26#include <asm/pci-bridge.h>
  27#include <asm/mpic.h>
  28#include <mm/mmu_decl.h>
  29#include <asm/udbg.h>
  30#include <asm/prom.h>
  31
  32#include <sysdev/fsl_soc.h>
  33#include <sysdev/fsl_pci.h>
  34
  35#include <asm/cpm2.h>
  36#include <sysdev/cpm2_pic.h>
  37
  38#include "mpc85xx.h"
  39
  40#define KSI8560_CPLD_HVR                0x04 /* Hardware Version Register */
  41#define KSI8560_CPLD_PVR                0x08 /* PLD Version Register */
  42#define KSI8560_CPLD_RCR1               0x30 /* Reset Command Register 1 */
  43
  44#define KSI8560_CPLD_RCR1_CPUHR         0x80 /* CPU Hard Reset */
  45
  46static void __iomem *cpld_base = NULL;
  47
  48static void machine_restart(char *cmd)
  49{
  50        if (cpld_base)
  51                out_8(cpld_base + KSI8560_CPLD_RCR1, KSI8560_CPLD_RCR1_CPUHR);
  52        else
  53                printk(KERN_ERR "Can't find CPLD base, hang forever\n");
  54
  55        for (;;);
  56}
  57
  58static void __init ksi8560_pic_init(void)
  59{
  60        struct mpic *mpic = mpic_alloc(NULL, 0,
  61                        MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  62                        0, 256, " OpenPIC  ");
  63        BUG_ON(mpic == NULL);
  64        mpic_init(mpic);
  65
  66        mpc85xx_cpm2_pic_init();
  67}
  68
  69#ifdef CONFIG_CPM2
  70/*
  71 * Setup I/O ports
  72 */
  73struct cpm_pin {
  74        int port, pin, flags;
  75};
  76
  77static struct cpm_pin __initdata ksi8560_pins[] = {
  78        /* SCC1 */
  79        {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  80        {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  81        {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  82
  83        /* SCC2 */
  84        {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  85        {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  86        {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  87
  88        /* FCC1 */
  89        {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  90        {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  91        {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  92        {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93        {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  94        {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  95        {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  96        {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  97        {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  98        {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  99        {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 100        {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 101        {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 102        {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 103        {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK9 */
 104        {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK10 */
 105
 106};
 107
 108static void __init init_ioports(void)
 109{
 110        int i;
 111
 112        for (i = 0; i < ARRAY_SIZE(ksi8560_pins); i++) {
 113                struct cpm_pin *pin = &ksi8560_pins[i];
 114                cpm2_set_pin(pin->port, pin->pin, pin->flags);
 115        }
 116
 117        cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 118        cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 119        cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 120        cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 121        cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_RX);
 122        cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 123}
 124#endif
 125
 126/*
 127 * Setup the architecture
 128 */
 129static void __init ksi8560_setup_arch(void)
 130{
 131        struct device_node *cpld;
 132
 133        cpld = of_find_compatible_node(NULL, NULL, "emerson,KSI8560-cpld");
 134        if (cpld)
 135                cpld_base = of_iomap(cpld, 0);
 136        else
 137                printk(KERN_ERR "Can't find CPLD in device tree\n");
 138
 139        if (ppc_md.progress)
 140                ppc_md.progress("ksi8560_setup_arch()", 0);
 141
 142#ifdef CONFIG_CPM2
 143        cpm2_reset();
 144        init_ioports();
 145#endif
 146}
 147
 148static void ksi8560_show_cpuinfo(struct seq_file *m)
 149{
 150        uint pvid, svid, phid1;
 151
 152        pvid = mfspr(SPRN_PVR);
 153        svid = mfspr(SPRN_SVR);
 154
 155        seq_printf(m, "Vendor\t\t: Emerson Network Power\n");
 156        seq_printf(m, "Board\t\t: KSI8560\n");
 157
 158        if (cpld_base) {
 159                seq_printf(m, "Hardware rev\t: %d\n",
 160                                        in_8(cpld_base + KSI8560_CPLD_HVR));
 161                seq_printf(m, "CPLD rev\t: %d\n",
 162                                        in_8(cpld_base + KSI8560_CPLD_PVR));
 163        } else
 164                seq_printf(m, "Unknown Hardware and CPLD revs\n");
 165
 166        seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 167        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 168
 169        /* Display cpu Pll setting */
 170        phid1 = mfspr(SPRN_HID1);
 171        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 172}
 173
 174machine_device_initcall(ksi8560, mpc85xx_common_publish_devices);
 175
 176/*
 177 * Called very early, device-tree isn't unflattened
 178 */
 179static int __init ksi8560_probe(void)
 180{
 181        unsigned long root = of_get_flat_dt_root();
 182
 183        return of_flat_dt_is_compatible(root, "emerson,KSI8560");
 184}
 185
 186define_machine(ksi8560) {
 187        .name                   = "KSI8560",
 188        .probe                  = ksi8560_probe,
 189        .setup_arch             = ksi8560_setup_arch,
 190        .init_IRQ               = ksi8560_pic_init,
 191        .show_cpuinfo           = ksi8560_show_cpuinfo,
 192        .get_irq                = mpic_get_irq,
 193        .restart                = machine_restart,
 194        .calibrate_decr         = generic_calibrate_decr,
 195};
 196