1 /*
2  * Platform setup for the MPC8xx based boards from TQM.
3  *
4  * Heiko Schocher <hs@denx.de>
5  * Copyright 2010 DENX Software Engineering GmbH
6  *
7  * based on:
8  * Vitaly Bordug <vbordug@ru.mvista.com>
9  *
10  * Copyright 2005 MontaVista Software Inc.
11  *
12  * Heavily modified by Scott Wood <scottwood@freescale.com>
13  * Copyright 2007 Freescale Semiconductor, Inc.
14  *
15  * This file is licensed under the terms of the GNU General Public License
16  * version 2. This program is licensed "as is" without any warranty of any
17  * kind, whether express or implied.
18  */
19 
20 #include <linux/init.h>
21 #include <linux/param.h>
22 #include <linux/string.h>
23 #include <linux/ioport.h>
24 #include <linux/device.h>
25 #include <linux/delay.h>
26 
27 #include <linux/fs_enet_pd.h>
28 #include <linux/fsl_devices.h>
29 #include <linux/mii.h>
30 #include <linux/of_fdt.h>
31 #include <linux/of_platform.h>
32 
33 #include <asm/delay.h>
34 #include <asm/io.h>
35 #include <asm/machdep.h>
36 #include <asm/page.h>
37 #include <asm/processor.h>
38 #include <asm/time.h>
39 #include <asm/8xx_immap.h>
40 #include <asm/cpm1.h>
41 #include <asm/fs_pd.h>
42 #include <asm/udbg.h>
43 
44 #include "mpc8xx.h"
45 #include "pic.h"
46 
47 struct cpm_pin {
48 	int port, pin, flags;
49 };
50 
51 static struct cpm_pin tqm8xx_pins[] __initdata = {
52 	/* SMC1 */
53 	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
54 	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
55 
56 	/* SCC1 */
57 	{CPM_PORTA, 5, CPM_PIN_INPUT}, /* CLK1 */
58 	{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
59 	{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
60 	{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
61 	{CPM_PORTC, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
62 	{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
63 	{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
64 };
65 
66 static struct cpm_pin tqm8xx_fec_pins[] __initdata = {
67 	/* MII */
68 	{CPM_PORTD, 3, CPM_PIN_OUTPUT},
69 	{CPM_PORTD, 4, CPM_PIN_OUTPUT},
70 	{CPM_PORTD, 5, CPM_PIN_OUTPUT},
71 	{CPM_PORTD, 6, CPM_PIN_OUTPUT},
72 	{CPM_PORTD, 7, CPM_PIN_OUTPUT},
73 	{CPM_PORTD, 8, CPM_PIN_OUTPUT},
74 	{CPM_PORTD, 9, CPM_PIN_OUTPUT},
75 	{CPM_PORTD, 10, CPM_PIN_OUTPUT},
76 	{CPM_PORTD, 11, CPM_PIN_OUTPUT},
77 	{CPM_PORTD, 12, CPM_PIN_OUTPUT},
78 	{CPM_PORTD, 13, CPM_PIN_OUTPUT},
79 	{CPM_PORTD, 14, CPM_PIN_OUTPUT},
80 	{CPM_PORTD, 15, CPM_PIN_OUTPUT},
81 };
82 
83 static void __init init_pins(int n, struct cpm_pin *pin)
84 {
85 	int i;
86 
87 	for (i = 0; i < n; i++) {
88 		cpm1_set_pin(pin->port, pin->pin, pin->flags);
89 		pin++;
90 	}
91 }
92 
93 static void __init init_ioports(void)
94 {
95 	struct device_node *dnode;
96 	struct property *prop;
97 	int	len;
98 
99 	init_pins(ARRAY_SIZE(tqm8xx_pins), &tqm8xx_pins[0]);
100 
101 	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
102 
103 	dnode = of_find_node_by_name(NULL, "aliases");
104 	if (dnode == NULL)
105 		return;
106 	prop = of_find_property(dnode, "ethernet1", &len);
107 
108 	of_node_put(dnode);
109 
110 	if (prop == NULL)
111 		return;
112 
113 	/* init FEC pins */
114 	init_pins(ARRAY_SIZE(tqm8xx_fec_pins), &tqm8xx_fec_pins[0]);
115 }
116 
117 static void __init tqm8xx_setup_arch(void)
118 {
119 	cpm_reset();
120 	init_ioports();
121 }
122 
123 static const struct of_device_id of_bus_ids[] __initconst = {
124 	{ .name = "soc", },
125 	{ .name = "cpm", },
126 	{ .name = "localbus", },
127 	{ .compatible = "simple-bus" },
128 	{},
129 };
130 
131 static int __init declare_of_platform_devices(void)
132 {
133 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
134 
135 	return 0;
136 }
137 machine_device_initcall(tqm8xx, declare_of_platform_devices);
138 
139 define_machine(tqm8xx) {
140 	.name			= "TQM8xx",
141 	.compatible		= "tqc,tqm8xx",
142 	.setup_arch		= tqm8xx_setup_arch,
143 	.init_IRQ		= mpc8xx_pic_init,
144 	.get_irq		= mpc8xx_get_irq,
145 	.restart		= mpc8xx_restart,
146 	.calibrate_decr		= mpc8xx_calibrate_decr,
147 	.set_rtc_time		= mpc8xx_set_rtc_time,
148 	.get_rtc_time		= mpc8xx_get_rtc_time,
149 	.progress		= udbg_progress,
150 };
151