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
130