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/fsl_pm.h>
  13 #include <soc/fsl/qe/qe.h>
  14 #include <sysdev/cpm2_pic.h>
  15
  16 #include "mpc85xx.h"
  17
  18 const struct fsl_pm_ops *qoriq_pm_ops;
  19
  20 static const struct of_device_id mpc85xx_common_ids[] __initconst = {
  21         { .type = "soc", },
  22         { .compatible = "soc", },
  23         { .compatible = "simple-bus", },
  24         { .name = "cpm", },
  25         { .name = "localbus", },
  26         { .compatible = "gianfar", },
  27         { .compatible = "fsl,qe", },
  28         { .compatible = "fsl,cpm2", },
  29         { .compatible = "fsl,srio", },
  30         /* So that the DMA channel nodes can be probed individually: */
  31         { .compatible = "fsl,eloplus-dma", },
  32         /* For the PMC driver */
  33         { .compatible = "fsl,mpc8548-guts", },
  34         /* Probably unnecessary? */
  35         { .compatible = "gpio-leds", },
  36         /* For all PCI controllers */
  37         { .compatible = "fsl,mpc8540-pci", },
  38         { .compatible = "fsl,mpc8548-pcie", },
  39         { .compatible = "fsl,p1022-pcie", },
  40         { .compatible = "fsl,p1010-pcie", },
  41         { .compatible = "fsl,p1023-pcie", },
  42         { .compatible = "fsl,p4080-pcie", },
  43         { .compatible = "fsl,qoriq-pcie-v2.4", },
  44         { .compatible = "fsl,qoriq-pcie-v2.3", },
  45         { .compatible = "fsl,qoriq-pcie-v2.2", },
  46         { .compatible = "fsl,fman", },
  47         {},
  48 };
  49
  50 int __init mpc85xx_common_publish_devices(void)
  51 {
  52         return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  53 }
  54 #ifdef CONFIG_CPM2
  55 static void cpm2_cascade(struct irq_desc *desc)
  56 {
  57         struct irq_chip *chip = irq_desc_get_chip(desc);
  58         int cascade_irq;
  59
  60         while ((cascade_irq = cpm2_get_irq()) >= 0)
  61                 generic_handle_irq(cascade_irq);
  62
  63         chip->irq_eoi(&desc->irq_data);
  64 }
  65
  66
  67 void __init mpc85xx_cpm2_pic_init(void)
  68 {
  69         struct device_node *np;
  70         int irq;
  71
  72         /* Setup CPM2 PIC */
  73         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  74         if (np == NULL) {
  75                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  76                 return;
  77         }
  78         irq = irq_of_parse_and_map(np, 0);
  79         if (!irq) {
  80                 of_node_put(np);
  81                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  82                 return;
  83         }
  84
  85         cpm2_pic_init(np);
  86         of_node_put(np);
  87         irq_set_chained_handler(irq, cpm2_cascade);
  88 }
  89 #endif
  90
  91 #ifdef CONFIG_QUICC_ENGINE
  92 void __init mpc85xx_qe_init(void)
  93 {
  94         struct device_node *np;
  95
  96         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
  97         if (!np) {
  98                 np = of_find_node_by_name(NULL, "qe");
  99                 if (!np) {
 100                         pr_err("%s: Could not find Quicc Engine node\n",
 101                                         __func__);
 102                         return;
 103                 }
 104         }
 105
 106         if (!of_device_is_available(np)) {
 107                 of_node_put(np);
 108                 return;
 109         }
 110
 111         of_node_put(np);
 112
 113 }
 114
 115 void __init mpc85xx_qe_par_io_init(void)
 116 {
 117         struct device_node *np;
 118
 119         np = of_find_node_by_name(NULL, "par_io");
 120         if (np) {
 121                 struct device_node *ucc;
 122
 123                 par_io_init(np);
 124                 of_node_put(np);
 125
 126                 for_each_node_by_name(ucc, "ucc")
 127                         par_io_of_config(ucc);
 128
 129         }
 130 }
 131 #endif