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 #ifdef CONFIG_CPM2
  36 #include <asm/cpm2.h>
  37 #include <sysdev/cpm2_pic.h>
  38 #endif
  39
  40 #ifdef CONFIG_CPM2
  41
  42 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  43 {
  44         int cascade_irq;
  45
  46         while ((cascade_irq = cpm2_get_irq()) >= 0)
  47                 generic_handle_irq(cascade_irq);
  48
  49         desc->chip->eoi(irq);
  50 }
  51
  52 #endif /* CONFIG_CPM2 */
  53
  54 static void __init sbc8560_pic_init(void)
  55 {
  56         struct mpic *mpic;
  57         struct resource r;
  58         struct device_node *np = NULL;
  59 #ifdef CONFIG_CPM2
  60         int irq;
  61 #endif
  62
  63         np = of_find_node_by_type(np, "open-pic");
  64         if (!np) {
  65                 printk(KERN_ERR "Could not find open-pic node\n");
  66                 return;
  67         }
  68
  69         if (of_address_to_resource(np, 0, &r)) {
  70                 printk(KERN_ERR "Could not map mpic register space\n");
  71                 of_node_put(np);
  72                 return;
  73         }
  74
  75         mpic = mpic_alloc(np, r.start,
  76                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  77                         0, 256, " OpenPIC  ");
  78         BUG_ON(mpic == NULL);
  79         of_node_put(np);
  80
  81         mpic_init(mpic);
  82
  83 #ifdef CONFIG_CPM2
  84         /* Setup CPM2 PIC */
  85         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  86         if (np == NULL) {
  87                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  88                 return;
  89         }
  90         irq = irq_of_parse_and_map(np, 0);
  91
  92         cpm2_pic_init(np);
  93         of_node_put(np);
  94         set_irq_chained_handler(irq, cpm2_cascade);
  95 #endif
  96 }
  97
  98 /*
  99  * Setup the architecture
 100  */
 101 #ifdef CONFIG_CPM2
 102 struct cpm_pin {
 103         int port, pin, flags;
 104 };
 105
 106 static const struct cpm_pin sbc8560_pins[] = {
 107         /* SCC1 */
 108         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 109         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 110         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 111
 112         /* SCC2 */
 113         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 114         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 115         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 116
 117         /* FCC2 */
 118         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 119         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 120         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 121         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 122         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 123         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 124         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 125         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 126         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 127         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 128         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 129         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 130         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 131         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 132         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK14 */
 133         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK13 */
 134
 135         /* FCC3 */
 136         {1, 4, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 137         {1, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 138         {1, 6, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 139         {1, 7, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 140         {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 141         {1, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 142         {1, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 143         {1, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 144         {1, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 145         {1, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 146         {1, 14, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 147         {1, 15, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 148         {1, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 149         {1, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 150         {2, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* CLK16 */
 151         {2, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* CLK15 */
 152 };
 153
 154 static void __init init_ioports(void)
 155 {
 156         int i;
 157
 158         for (i = 0; i < ARRAY_SIZE(sbc8560_pins); i++) {
 159                 const struct cpm_pin *pin = &sbc8560_pins[i];
 160                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 161         }
 162
 163         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 164         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 165         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 166         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 167         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 168         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 169         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK15, CPM_CLK_RX);
 170         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK16, CPM_CLK_TX);
 171 }
 172 #endif
 173
 174 static void __init sbc8560_setup_arch(void)
 175 {
 176 #ifdef CONFIG_PCI
 177         struct device_node *np;
 178 #endif
 179
 180         if (ppc_md.progress)
 181                 ppc_md.progress("sbc8560_setup_arch()", 0);
 182
 183 #ifdef CONFIG_CPM2
 184         cpm2_reset();
 185         init_ioports();
 186 #endif
 187
 188 #ifdef CONFIG_PCI
 189         for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
 190                 fsl_add_bridge(np, 1);
 191 #endif
 192 }
 193
 194 static void sbc8560_show_cpuinfo(struct seq_file *m)
 195 {
 196         uint pvid, svid, phid1;
 197
 198         pvid = mfspr(SPRN_PVR);
 199         svid = mfspr(SPRN_SVR);
 200
 201         seq_printf(m, "Vendor\t\t: Wind River\n");
 202         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 203         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 204
 205         /* Display cpu Pll setting */
 206         phid1 = mfspr(SPRN_HID1);
 207         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 208 }
 209
 210 static struct of_device_id __initdata of_bus_ids[] = {
 211         { .name = "soc", },
 212         { .type = "soc", },
 213         { .name = "cpm", },
 214         { .name = "localbus", },
 215         { .compatible = "simple-bus", },
 216         { .compatible = "gianfar", },
 217         {},
 218 };
 219
 220 static int __init declare_of_platform_devices(void)
 221 {
 222         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 223
 224         return 0;
 225 }
 226 machine_device_initcall(sbc8560, declare_of_platform_devices);
 227
 228 /*
 229  * Called very early, device-tree isn't unflattened
 230  */
 231 static int __init sbc8560_probe(void)
 232 {
 233         unsigned long root = of_get_flat_dt_root();
 234
 235         return of_flat_dt_is_compatible(root, "SBC8560");
 236 }
 237
 238 #ifdef CONFIG_RTC_DRV_M48T59
 239 static int __init sbc8560_rtc_init(void)
 240 {
 241         struct device_node *np;
 242         struct resource res;
 243         struct platform_device *rtc_dev;
 244
 245         np = of_find_compatible_node(NULL, NULL, "m48t59");
 246         if (np == NULL) {
 247                 printk("No RTC in DTB. Has it been eaten by wild dogs?\n");
 248                 return -ENODEV;
 249         }
 250
 251         of_address_to_resource(np, 0, &res);
 252         of_node_put(np);
 253
 254         printk("Found RTC (m48t59) at i/o 0x%x\n", res.start);
 255
 256         rtc_dev = platform_device_register_simple("rtc-m48t59", 0, &res, 1);
 257
 258         if (IS_ERR(rtc_dev)) {
 259                 printk("Registering sbc8560 RTC device failed\n");
 260                 return PTR_ERR(rtc_dev);
 261         }
 262
 263         return 0;
 264 }
 265
 266 arch_initcall(sbc8560_rtc_init);
 267
 268 #endif  /* M48T59 */
 269
 270 static __u8 __iomem *brstcr;
 271
 272 static int __init sbc8560_bdrstcr_init(void)
 273 {
 274         struct device_node *np;
 275         struct resource res;
 276
 277         np = of_find_compatible_node(NULL, NULL, "wrs,sbc8560-brstcr");
 278         if (np == NULL) {
 279                 printk(KERN_WARNING "sbc8560: No board specific RSTCR in DTB.\n");
 280                 return -ENODEV;
 281         }
 282
 283         of_address_to_resource(np, 0, &res);
 284
 285         printk(KERN_INFO "sbc8560: Found BRSTCR at i/o 0x%x\n", res.start);
 286
 287         brstcr = ioremap(res.start, res.end - res.start);
 288         if(!brstcr)
 289                 printk(KERN_WARNING "sbc8560: ioremap of brstcr failed.\n");
 290
 291         of_node_put(np);
 292
 293         return 0;
 294 }
 295
 296 arch_initcall(sbc8560_bdrstcr_init);
 297
 298 void sbc8560_rstcr_restart(char * cmd)
 299 {
 300         local_irq_disable();
 301         if(brstcr)
 302                 clrbits8(brstcr, 0x80);
 303
 304         while(1);
 305 }
 306
 307 define_machine(sbc8560) {
 308         .name                   = "SBC8560",
 309         .probe                  = sbc8560_probe,
 310         .setup_arch             = sbc8560_setup_arch,
 311         .init_IRQ               = sbc8560_pic_init,
 312         .show_cpuinfo           = sbc8560_show_cpuinfo,
 313         .get_irq                = mpic_get_irq,
 314         .restart                = sbc8560_rstcr_restart,
 315         .calibrate_decr         = generic_calibrate_decr,
 316         .progress               = udbg_progress,
 317 };