arch/powerpc/platforms/85xx/sbc8560.c

   1 /*
   2  * Wind River SBC8560 setup and early boot code.
   3  *
   4  * Copyright 2007 Wind River Systems Inc.
   5  *
   6  * By Paul Gortmaker (see MAINTAINERS for contact information)
   7  *
   8  * Based largely on the MPC8560ADS support - Copyright 2005 Freescale Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <linux/stddef.h>
  17 #include <linux/kernel.h>
  18 #include <linux/pci.h>
  19 #include <linux/kdev_t.h>
  20 #include <linux/delay.h>
  21 #include <linux/seq_file.h>
  22 #include <linux/of_platform.h>
  23
  24 #include <asm/system.h>
  25 #include <asm/time.h>
  26 #include <asm/machdep.h>
  27 #include <asm/pci-bridge.h>
  28 #include <asm/mpic.h>
  29 #include <mm/mmu_decl.h>
  30 #include <asm/udbg.h>
  31
  32 #include <sysdev/fsl_soc.h>
  33 #include <sysdev/fsl_pci.h>
  34
  35 #include "mpc85xx.h"
  36
  37 #ifdef CONFIG_CPM2
  38 #include <asm/cpm2.h>
  39 #include <sysdev/cpm2_pic.h>
  40 #endif
  41
  42 static void __init sbc8560_pic_init(void)
  43 {
  44         struct mpic *mpic;
  45         struct resource r;
  46         struct device_node *np = NULL;
  47
  48         np = of_find_node_by_type(np, "open-pic");
  49         if (!np) {
  50                 printk(KERN_ERR "Could not find open-pic node\n");
  51                 return;
  52         }
  53
  54         if (of_address_to_resource(np, 0, &r)) {
  55                 printk(KERN_ERR "Could not map mpic register space\n");
  56                 of_node_put(np);
  57                 return;
  58         }
  59
  60         mpic = mpic_alloc(np, r.start,
  61                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  62                         0, 256, " OpenPIC  ");
  63         BUG_ON(mpic == NULL);
  64         of_node_put(np);
  65
  66         mpic_init(mpic);
  67
  68         mpc85xx_cpm2_pic_init();
  69 }
  70
  71 /*
  72  * Setup the architecture
  73  */
  74 #ifdef CONFIG_CPM2
  75 struct cpm_pin {
  76         int port, pin, flags;
  77 };
  78
  79 static const struct cpm_pin sbc8560_pins[] = {
  80         /* SCC1 */
  81         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  82         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  83         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  84
  85         /* SCC2 */
  86         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  87         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  88         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  89
  90         /* FCC2 */
  91         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  92         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  94         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  95         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  96         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  97         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  98         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  99         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 100         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 101         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 102         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 103         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 104         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 105         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK14 */
 106         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK13 */
 107
 108         /* FCC3 */
 109         {1, 4, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 110         {1, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 111         {1, 6, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 112         {1, 7, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 113         {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 114         {1, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 115         {1, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 116         {1, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 117         {1, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 118         {1, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 119         {1, 14, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 120         {1, 15, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 121         {1, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 122         {1, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 123         {2, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* CLK16 */
 124         {2, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* CLK15 */
 125 };
 126
 127 static void __init init_ioports(void)
 128 {
 129         int i;
 130
 131         for (i = 0; i < ARRAY_SIZE(sbc8560_pins); i++) {
 132                 const struct cpm_pin *pin = &sbc8560_pins[i];
 133                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 134         }
 135
 136         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 137         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 138         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 139         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 140         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 141         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 142         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK15, CPM_CLK_RX);
 143         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK16, CPM_CLK_TX);
 144 }
 145 #endif
 146
 147 static void __init sbc8560_setup_arch(void)
 148 {
 149 #ifdef CONFIG_PCI
 150         struct device_node *np;
 151 #endif
 152
 153         if (ppc_md.progress)
 154                 ppc_md.progress("sbc8560_setup_arch()", 0);
 155
 156 #ifdef CONFIG_CPM2
 157         cpm2_reset();
 158         init_ioports();
 159 #endif
 160
 161 #ifdef CONFIG_PCI
 162         for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
 163                 fsl_add_bridge(np, 1);
 164 #endif
 165 }
 166
 167 static void sbc8560_show_cpuinfo(struct seq_file *m)
 168 {
 169         uint pvid, svid, phid1;
 170
 171         pvid = mfspr(SPRN_PVR);
 172         svid = mfspr(SPRN_SVR);
 173
 174         seq_printf(m, "Vendor\t\t: Wind River\n");
 175         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 176         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 177
 178         /* Display cpu Pll setting */
 179         phid1 = mfspr(SPRN_HID1);
 180         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 181 }
 182
 183 machine_device_initcall(sbc8560, mpc85xx_common_publish_devices);
 184
 185 /*
 186  * Called very early, device-tree isn't unflattened
 187  */
 188 static int __init sbc8560_probe(void)
 189 {
 190         unsigned long root = of_get_flat_dt_root();
 191
 192         return of_flat_dt_is_compatible(root, "SBC8560");
 193 }
 194
 195 #ifdef CONFIG_RTC_DRV_M48T59
 196 static int __init sbc8560_rtc_init(void)
 197 {
 198         struct device_node *np;
 199         struct resource res;
 200         struct platform_device *rtc_dev;
 201
 202         np = of_find_compatible_node(NULL, NULL, "m48t59");
 203         if (np == NULL) {
 204                 printk("No RTC in DTB. Has it been eaten by wild dogs?\n");
 205                 return -ENODEV;
 206         }
 207
 208         of_address_to_resource(np, 0, &res);
 209         of_node_put(np);
 210
 211         printk("Found RTC (m48t59) at i/o 0x%x\n", res.start);
 212
 213         rtc_dev = platform_device_register_simple("rtc-m48t59", 0, &res, 1);
 214
 215         if (IS_ERR(rtc_dev)) {
 216                 printk("Registering sbc8560 RTC device failed\n");
 217                 return PTR_ERR(rtc_dev);
 218         }
 219
 220         return 0;
 221 }
 222
 223 arch_initcall(sbc8560_rtc_init);
 224
 225 #endif  /* M48T59 */
 226
 227 static __u8 __iomem *brstcr;
 228
 229 static int __init sbc8560_bdrstcr_init(void)
 230 {
 231         struct device_node *np;
 232         struct resource res;
 233
 234         np = of_find_compatible_node(NULL, NULL, "wrs,sbc8560-brstcr");
 235         if (np == NULL) {
 236                 printk(KERN_WARNING "sbc8560: No board specific RSTCR in DTB.\n");
 237                 return -ENODEV;
 238         }
 239
 240         of_address_to_resource(np, 0, &res);
 241
 242         printk(KERN_INFO "sbc8560: Found BRSTCR at %pR\n", &res);
 243
 244         brstcr = ioremap(res.start, resource_size(&res));
 245         if(!brstcr)
 246                 printk(KERN_WARNING "sbc8560: ioremap of brstcr failed.\n");
 247
 248         of_node_put(np);
 249
 250         return 0;
 251 }
 252
 253 arch_initcall(sbc8560_bdrstcr_init);
 254
 255 void sbc8560_rstcr_restart(char * cmd)
 256 {
 257         local_irq_disable();
 258         if(brstcr)
 259                 clrbits8(brstcr, 0x80);
 260
 261         while(1);
 262 }
 263
 264 define_machine(sbc8560) {
 265         .name                   = "SBC8560",
 266         .probe                  = sbc8560_probe,
 267         .setup_arch             = sbc8560_setup_arch,
 268         .init_IRQ               = sbc8560_pic_init,
 269         .show_cpuinfo           = sbc8560_show_cpuinfo,
 270         .get_irq                = mpic_get_irq,
 271         .restart                = sbc8560_rstcr_restart,
 272         .calibrate_decr         = generic_calibrate_decr,
 273         .progress               = udbg_progress,
 274 };