kernel/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/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
  45 static void __iomem *cpld_base = NULL;
  46
  47 static void 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
  57 static 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  */
  71 struct cpm_pin {
  72         int port, pin, flags;
  73 };
  74
  75 static 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
 106 static 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  */
 127 static 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
 146 static 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
 172 machine_device_initcall(ksi8560, mpc85xx_common_publish_devices);
 173
 174 /*
 175  * Called very early, device-tree isn't unflattened
 176  */
 177 static int __init ksi8560_probe(void)
 178 {
 179         unsigned long root = of_get_flat_dt_root();
 180
 181         return of_flat_dt_is_compatible(root, "emerson,KSI8560");
 182 }
 183
 184 define_machine(ksi8560) {
 185         .name                   = "KSI8560",
 186         .probe                  = ksi8560_probe,
 187         .setup_arch             = ksi8560_setup_arch,
 188         .init_IRQ               = ksi8560_pic_init,
 189         .show_cpuinfo           = ksi8560_show_cpuinfo,
 190         .get_irq                = mpic_get_irq,
 191         .restart                = machine_restart,
 192         .calibrate_decr         = generic_calibrate_decr,
 193 };