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

   1 /*
   2  * Routines common to most mpc85xx-based boards.
   3  *
   4  * This is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/of_irq.h>
  10 #include <linux/of_platform.h>
  11
  12 #include <asm/qe.h>
  13 #include <sysdev/cpm2_pic.h>
  14
  15 #include "mpc85xx.h"
  16
  17 static const struct of_device_id mpc85xx_common_ids[] __initconst = {
  18         { .type = "soc", },
  19         { .compatible = "soc", },
  20         { .compatible = "simple-bus", },
  21         { .name = "cpm", },
  22         { .name = "localbus", },
  23         { .compatible = "gianfar", },
  24         { .compatible = "fsl,qe", },
  25         { .compatible = "fsl,cpm2", },
  26         { .compatible = "fsl,srio", },
  27         /* So that the DMA channel nodes can be probed individually: */
  28         { .compatible = "fsl,eloplus-dma", },
  29         /* For the PMC driver */
  30         { .compatible = "fsl,mpc8548-guts", },
  31         /* Probably unnecessary? */
  32         { .compatible = "gpio-leds", },
  33         /* For all PCI controllers */
  34         { .compatible = "fsl,mpc8540-pci", },
  35         { .compatible = "fsl,mpc8548-pcie", },
  36         { .compatible = "fsl,p1022-pcie", },
  37         { .compatible = "fsl,p1010-pcie", },
  38         { .compatible = "fsl,p1023-pcie", },
  39         { .compatible = "fsl,p4080-pcie", },
  40         { .compatible = "fsl,qoriq-pcie-v2.4", },
  41         { .compatible = "fsl,qoriq-pcie-v2.3", },
  42         { .compatible = "fsl,qoriq-pcie-v2.2", },
  43         {},
  44 };
  45
  46 int __init mpc85xx_common_publish_devices(void)
  47 {
  48         return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  49 }
  50 #ifdef CONFIG_CPM2
  51 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  52 {
  53         struct irq_chip *chip = irq_desc_get_chip(desc);
  54         int cascade_irq;
  55
  56         while ((cascade_irq = cpm2_get_irq()) >= 0)
  57                 generic_handle_irq(cascade_irq);
  58
  59         chip->irq_eoi(&desc->irq_data);
  60 }
  61
  62
  63 void __init mpc85xx_cpm2_pic_init(void)
  64 {
  65         struct device_node *np;
  66         int irq;
  67
  68         /* Setup CPM2 PIC */
  69         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  70         if (np == NULL) {
  71                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  72                 return;
  73         }
  74         irq = irq_of_parse_and_map(np, 0);
  75         if (irq == NO_IRQ) {
  76                 of_node_put(np);
  77                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  78                 return;
  79         }
  80
  81         cpm2_pic_init(np);
  82         of_node_put(np);
  83         irq_set_chained_handler(irq, cpm2_cascade);
  84 }
  85 #endif
  86
  87 #ifdef CONFIG_QUICC_ENGINE
  88 void __init mpc85xx_qe_init(void)
  89 {
  90         struct device_node *np;
  91
  92         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
  93         if (!np) {
  94                 np = of_find_node_by_name(NULL, "qe");
  95                 if (!np) {
  96                         pr_err("%s: Could not find Quicc Engine node\n",
  97                                         __func__);
  98                         return;
  99                 }
 100         }
 101
 102         if (!of_device_is_available(np)) {
 103                 of_node_put(np);
 104                 return;
 105         }
 106
 107         qe_reset();
 108         of_node_put(np);
 109
 110 }
 111
 112 void __init mpc85xx_qe_par_io_init(void)
 113 {
 114         struct device_node *np;
 115
 116         np = of_find_node_by_name(NULL, "par_io");
 117         if (np) {
 118                 struct device_node *ucc;
 119
 120                 par_io_init(np);
 121                 of_node_put(np);
 122
 123                 for_each_node_by_name(ucc, "ucc")
 124                         par_io_of_config(ucc);
 125
 126         }
 127 }
 128 #endif