arch/powerpc/platforms/85xx/ksi8560.c

   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
  46 static void __iomem *cpld_base = NULL;
  47
  48 static 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
  58 static 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  */
  73 struct cpm_pin {
  74         int port, pin, flags;
  75 };
  76
  77 static 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
 108 static 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  */
 129 static 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
 148 static 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
 174 machine_device_initcall(ksi8560, mpc85xx_common_publish_devices);
 175
 176 /*
 177  * Called very early, device-tree isn't unflattened
 178  */
 179 static 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
 186 define_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 };