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         { .compatible = "fsl,fman", },
  44         {},
  45 };
  46
  47 int __init mpc85xx_common_publish_devices(void)
  48 {
  49         return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  50 }
  51 #ifdef CONFIG_CPM2
  52 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  53 {
  54         struct irq_chip *chip = irq_desc_get_chip(desc);
  55         int cascade_irq;
  56
  57         while ((cascade_irq = cpm2_get_irq()) >= 0)
  58                 generic_handle_irq(cascade_irq);
  59
  60         chip->irq_eoi(&desc->irq_data);
  61 }
  62
  63
  64 void __init mpc85xx_cpm2_pic_init(void)
  65 {
  66         struct device_node *np;
  67         int irq;
  68
  69         /* Setup CPM2 PIC */
  70         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  71         if (np == NULL) {
  72                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  73                 return;
  74         }
  75         irq = irq_of_parse_and_map(np, 0);
  76         if (irq == NO_IRQ) {
  77                 of_node_put(np);
  78                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  79                 return;
  80         }
  81
  82         cpm2_pic_init(np);
  83         of_node_put(np);
  84         irq_set_chained_handler(irq, cpm2_cascade);
  85 }
  86 #endif
  87
  88 #ifdef CONFIG_QUICC_ENGINE
  89 void __init mpc85xx_qe_init(void)
  90 {
  91         struct device_node *np;
  92
  93         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
  94         if (!np) {
  95                 np = of_find_node_by_name(NULL, "qe");
  96                 if (!np) {
  97                         pr_err("%s: Could not find Quicc Engine node\n",
  98                                         __func__);
  99                         return;
 100                 }
 101         }
 102
 103         if (!of_device_is_available(np)) {
 104                 of_node_put(np);
 105                 return;
 106         }
 107
 108         qe_reset();
 109         of_node_put(np);
 110
 111 }
 112
 113 void __init mpc85xx_qe_par_io_init(void)
 114 {
 115         struct device_node *np;
 116
 117         np = of_find_node_by_name(NULL, "par_io");
 118         if (np) {
 119                 struct device_node *ucc;
 120
 121                 par_io_init(np);
 122                 of_node_put(np);
 123
 124                 for_each_node_by_name(ucc, "ucc")
 125                         par_io_of_config(ucc);
 126
 127         }
 128 }
 129 #endif