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/time.h>
  24#include <asm/machdep.h>
  25#include <asm/pci-bridge.h>
  26#include <asm/mpic.h>
  27#include <mm/mmu_decl.h>
  28#include <asm/udbg.h>
  29#include <asm/prom.h>
  30
  31#include <sysdev/fsl_soc.h>
  32#include <sysdev/fsl_pci.h>
  33
  34#include <asm/cpm2.h>
  35#include <sysdev/cpm2_pic.h>
  36
  37#include "mpc85xx.h"
  38
  39#define KSI8560_CPLD_HVR                0x04 /* Hardware Version Register */
  40#define KSI8560_CPLD_PVR                0x08 /* PLD Version Register */
  41#define KSI8560_CPLD_RCR1               0x30 /* Reset Command Register 1 */
  42
  43#define KSI8560_CPLD_RCR1_CPUHR         0x80 /* CPU Hard Reset */
  44
  45static void __iomem *cpld_base = NULL;
  46
  47static void __noreturn machine_restart(char *cmd)
  48{
  49        if (cpld_base)
  50                out_8(cpld_base + KSI8560_CPLD_RCR1, KSI8560_CPLD_RCR1_CPUHR);
  51        else
  52                printk(KERN_ERR "Can't find CPLD base, hang forever\n");
  53
  54        for (;;);
  55}
  56
  57static void __init ksi8560_pic_init(void)
  58{
  59        struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  60                        0, 256, " OpenPIC  ");
  61        BUG_ON(mpic == NULL);
  62        mpic_init(mpic);
  63
  64        mpc85xx_cpm2_pic_init();
  65}
  66
  67#ifdef CONFIG_CPM2
  68/*
  69 * Setup I/O ports
  70 */
  71struct cpm_pin {
  72        int port, pin, flags;
  73};
  74
  75static struct cpm_pin __initdata ksi8560_pins[] = {
  76        /* SCC1 */
  77        {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  78        {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  79        {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  80
  81        /* SCC2 */
  82        {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  83        {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  84        {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  85
  86        /* FCC1 */
  87        {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  88        {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  89        {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  90        {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  91        {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  92        {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  93        {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  94        {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  95        {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  96        {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  97        {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  98        {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  99        {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 100        {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 101        {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK9 */
 102        {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK10 */
 103
 104};
 105
 106static void __init init_ioports(void)
 107{
 108        int i;
 109
 110        for (i = 0; i < ARRAY_SIZE(ksi8560_pins); i++) {
 111                struct cpm_pin *pin = &ksi8560_pins[i];
 112                cpm2_set_pin(pin->port, pin->pin, pin->flags);
 113        }
 114
 115        cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 116        cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 117        cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 118        cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 119        cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_RX);
 120        cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 121}
 122#endif
 123
 124/*
 125 * Setup the architecture
 126 */
 127static void __init ksi8560_setup_arch(void)
 128{
 129        struct device_node *cpld;
 130
 131        cpld = of_find_compatible_node(NULL, NULL, "emerson,KSI8560-cpld");
 132        if (cpld)
 133                cpld_base = of_iomap(cpld, 0);
 134        else
 135                printk(KERN_ERR "Can't find CPLD in device tree\n");
 136
 137        if (ppc_md.progress)
 138                ppc_md.progress("ksi8560_setup_arch()", 0);
 139
 140#ifdef CONFIG_CPM2
 141        cpm2_reset();
 142        init_ioports();
 143#endif
 144}
 145
 146static void ksi8560_show_cpuinfo(struct seq_file *m)
 147{
 148        uint pvid, svid, phid1;
 149
 150        pvid = mfspr(SPRN_PVR);
 151        svid = mfspr(SPRN_SVR);
 152
 153        seq_printf(m, "Vendor\t\t: Emerson Network Power\n");
 154        seq_printf(m, "Board\t\t: KSI8560\n");
 155
 156        if (cpld_base) {
 157                seq_printf(m, "Hardware rev\t: %d\n",
 158                                        in_8(cpld_base + KSI8560_CPLD_HVR));
 159                seq_printf(m, "CPLD rev\t: %d\n",
 160                                        in_8(cpld_base + KSI8560_CPLD_PVR));
 161        } else
 162                seq_printf(m, "Unknown Hardware and CPLD revs\n");
 163
 164        seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 165        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 166
 167        /* Display cpu Pll setting */
 168        phid1 = mfspr(SPRN_HID1);
 169        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 170}
 171
 172machine_device_initcall(ksi8560, mpc85xx_common_publish_devices);
 173
 174/*
 175 * Called very early, device-tree isn't unflattened
 176 */
 177static int __init ksi8560_probe(void)
 178{
 179        return of_machine_is_compatible("emerson,KSI8560");
 180}
 181
 182define_machine(ksi8560) {
 183        .name                   = "KSI8560",
 184        .probe                  = ksi8560_probe,
 185        .setup_arch             = ksi8560_setup_arch,
 186        .init_IRQ               = ksi8560_pic_init,
 187        .show_cpuinfo           = ksi8560_show_cpuinfo,
 188        .get_irq                = mpic_get_irq,
 189        .restart                = machine_restart,
 190        .calibrate_decr         = generic_calibrate_decr,
 191};
 192