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/module.h>
22 #include <linux/param.h>
23 #include <linux/string.h>
24 #include <linux/ioport.h>
25 #include <linux/device.h>
26 #include <linux/delay.h>
27 
28 #include <linux/fs_enet_pd.h>
29 #include <linux/fs_uart_pd.h>
30 #include <linux/fsl_devices.h>
31 #include <linux/mii.h>
32 #include <linux/of_platform.h>
33 
34 #include <asm/delay.h>
35 #include <asm/io.h>
36 #include <asm/machdep.h>
37 #include <asm/page.h>
38 #include <asm/processor.h>
39 #include <asm/system.h>
40 #include <asm/time.h>
41 #include <asm/mpc8xx.h>
42 #include <asm/8xx_immap.h>
43 #include <asm/cpm1.h>
44 #include <asm/fs_pd.h>
45 #include <asm/udbg.h>
46 
47 #include "mpc8xx.h"
48 
49 struct cpm_pin {
50 	int port, pin, flags;
51 };
52 
53 static struct __initdata cpm_pin tqm8xx_pins[] = {
54 	/* SMC1 */
55 	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
56 	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
57 
58 	/* SCC1 */
59 	{CPM_PORTA, 5, CPM_PIN_INPUT}, /* CLK1 */
60 	{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
61 	{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
62 	{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
63 	{CPM_PORTC, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
64 	{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
65 	{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
66 };
67 
68 static struct __initdata cpm_pin tqm8xx_fec_pins[] = {
69 	/* MII */
70 	{CPM_PORTD, 3, CPM_PIN_OUTPUT},
71 	{CPM_PORTD, 4, CPM_PIN_OUTPUT},
72 	{CPM_PORTD, 5, CPM_PIN_OUTPUT},
73 	{CPM_PORTD, 6, CPM_PIN_OUTPUT},
74 	{CPM_PORTD, 7, CPM_PIN_OUTPUT},
75 	{CPM_PORTD, 8, CPM_PIN_OUTPUT},
76 	{CPM_PORTD, 9, CPM_PIN_OUTPUT},
77 	{CPM_PORTD, 10, CPM_PIN_OUTPUT},
78 	{CPM_PORTD, 11, CPM_PIN_OUTPUT},
79 	{CPM_PORTD, 12, CPM_PIN_OUTPUT},
80 	{CPM_PORTD, 13, CPM_PIN_OUTPUT},
81 	{CPM_PORTD, 14, CPM_PIN_OUTPUT},
82 	{CPM_PORTD, 15, CPM_PIN_OUTPUT},
83 };
84 
85 static void __init init_pins(int n, struct cpm_pin *pin)
86 {
87 	int i;
88 
89 	for (i = 0; i < n; i++) {
90 		cpm1_set_pin(pin->port, pin->pin, pin->flags);
91 		pin++;
92 	}
93 }
94 
95 static void __init init_ioports(void)
96 {
97 	struct device_node *dnode;
98 	struct property *prop;
99 	int	len;
100 
101 	init_pins(ARRAY_SIZE(tqm8xx_pins), &tqm8xx_pins[0]);
102 
103 	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
104 
105 	dnode = of_find_node_by_name(NULL, "aliases");
106 	if (dnode == NULL)
107 		return;
108 	prop = of_find_property(dnode, "ethernet1", &len);
109 	if (prop == NULL)
110 		return;
111 
112 	/* init FEC pins */
113 	init_pins(ARRAY_SIZE(tqm8xx_fec_pins), &tqm8xx_fec_pins[0]);
114 }
115 
116 static void __init tqm8xx_setup_arch(void)
117 {
118 	cpm_reset();
119 	init_ioports();
120 }
121 
122 static int __init tqm8xx_probe(void)
123 {
124 	unsigned long node = of_get_flat_dt_root();
125 
126 	return of_flat_dt_is_compatible(node, "tqc,tqm8xx");
127 }
128 
129 static struct of_device_id __initdata of_bus_ids[] = {
130 	{ .name = "soc", },
131 	{ .name = "cpm", },
132 	{ .name = "localbus", },
133 	{ .compatible = "simple-bus" },
134 	{},
135 };
136 
137 static int __init declare_of_platform_devices(void)
138 {
139 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
140 
141 	return 0;
142 }
143 machine_device_initcall(tqm8xx, declare_of_platform_devices);
144 
145 define_machine(tqm8xx) {
146 	.name			= "TQM8xx",
147 	.probe			= tqm8xx_probe,
148 	.setup_arch		= tqm8xx_setup_arch,
149 	.init_IRQ		= mpc8xx_pics_init,
150 	.get_irq		= mpc8xx_get_irq,
151 	.restart		= mpc8xx_restart,
152 	.calibrate_decr		= mpc8xx_calibrate_decr,
153 	.set_rtc_time		= mpc8xx_set_rtc_time,
154 	.get_rtc_time		= mpc8xx_get_rtc_time,
155 	.progress		= udbg_progress,
156 };
157