1 /*arch/powerpc/platforms/8xx/mpc86xads_setup.c
2  *
3  * Platform setup for the Freescale mpc86xads board
4  *
5  * Vitaly Bordug <vbordug@ru.mvista.com>
6  *
7  * Copyright 2005 MontaVista Software Inc.
8  *
9  * Heavily modified by Scott Wood <scottwood@freescale.com>
10  * Copyright 2007 Freescale Semiconductor, Inc.
11  *
12  * This file is licensed under the terms of the GNU General Public License
13  * version 2. This program is licensed "as is" without any warranty of any
14  * kind, whether express or implied.
15  */
16 
17 #include <linux/init.h>
18 #include <linux/of_address.h>
19 #include <linux/of_fdt.h>
20 #include <linux/of_platform.h>
21 
22 #include <asm/io.h>
23 #include <asm/machdep.h>
24 #include <asm/time.h>
25 #include <asm/8xx_immap.h>
26 #include <asm/cpm1.h>
27 #include <asm/udbg.h>
28 
29 #include "mpc86xads.h"
30 #include "mpc8xx.h"
31 #include "pic.h"
32 
33 struct cpm_pin {
34 	int port, pin, flags;
35 };
36 
37 static struct cpm_pin mpc866ads_pins[] = {
38 	/* SMC1 */
39 	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
40 	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
41 
42 	/* SMC2 */
43 	{CPM_PORTB, 21, CPM_PIN_INPUT}, /* RX */
44 	{CPM_PORTB, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
45 
46 	/* SCC1 */
47 	{CPM_PORTA, 6, CPM_PIN_INPUT}, /* CLK1 */
48 	{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
49 	{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
50 	{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
51 	{CPM_PORTB, 19, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
52 	{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
53 	{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */
54 
55 	/* MII */
56 	{CPM_PORTD, 3, CPM_PIN_OUTPUT},
57 	{CPM_PORTD, 4, CPM_PIN_OUTPUT},
58 	{CPM_PORTD, 5, CPM_PIN_OUTPUT},
59 	{CPM_PORTD, 6, CPM_PIN_OUTPUT},
60 	{CPM_PORTD, 7, CPM_PIN_OUTPUT},
61 	{CPM_PORTD, 8, CPM_PIN_OUTPUT},
62 	{CPM_PORTD, 9, CPM_PIN_OUTPUT},
63 	{CPM_PORTD, 10, CPM_PIN_OUTPUT},
64 	{CPM_PORTD, 11, CPM_PIN_OUTPUT},
65 	{CPM_PORTD, 12, CPM_PIN_OUTPUT},
66 	{CPM_PORTD, 13, CPM_PIN_OUTPUT},
67 	{CPM_PORTD, 14, CPM_PIN_OUTPUT},
68 	{CPM_PORTD, 15, CPM_PIN_OUTPUT},
69 
70 	/* I2C */
71 	{CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
72 	{CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
73 };
74 
75 static void __init init_ioports(void)
76 {
77 	int i;
78 
79 	for (i = 0; i < ARRAY_SIZE(mpc866ads_pins); i++) {
80 		struct cpm_pin *pin = &mpc866ads_pins[i];
81 		cpm1_set_pin(pin->port, pin->pin, pin->flags);
82 	}
83 
84 	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
85 	cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
86 	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK1, CPM_CLK_TX);
87 	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
88 
89 	/* Set FEC1 and FEC2 to MII mode */
90 	clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
91 }
92 
93 static void __init mpc86xads_setup_arch(void)
94 {
95 	struct device_node *np;
96 	u32 __iomem *bcsr_io;
97 
98 	cpm_reset();
99 	init_ioports();
100 
101 	np = of_find_compatible_node(NULL, NULL, "fsl,mpc866ads-bcsr");
102 	if (!np) {
103 		printk(KERN_CRIT "Could not find fsl,mpc866ads-bcsr node\n");
104 		return;
105 	}
106 
107 	bcsr_io = of_iomap(np, 0);
108 	of_node_put(np);
109 
110 	if (bcsr_io == NULL) {
111 		printk(KERN_CRIT "Could not remap BCSR\n");
112 		return;
113 	}
114 
115 	clrbits32(bcsr_io, BCSR1_RS232EN_1 | BCSR1_RS232EN_2 | BCSR1_ETHEN);
116 	iounmap(bcsr_io);
117 }
118 
119 static const struct of_device_id of_bus_ids[] __initconst = {
120 	{ .name = "soc", },
121 	{ .name = "cpm", },
122 	{ .name = "localbus", },
123 	{},
124 };
125 
126 static int __init declare_of_platform_devices(void)
127 {
128 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
129 
130 	return 0;
131 }
132 machine_device_initcall(mpc86x_ads, declare_of_platform_devices);
133 
134 define_machine(mpc86x_ads) {
135 	.name			= "MPC86x ADS",
136 	.compatible		= "fsl,mpc866ads",
137 	.setup_arch		= mpc86xads_setup_arch,
138 	.init_IRQ		= mpc8xx_pic_init,
139 	.get_irq		= mpc8xx_get_irq,
140 	.restart		= mpc8xx_restart,
141 	.calibrate_decr		= mpc8xx_calibrate_decr,
142 	.set_rtc_time		= mpc8xx_set_rtc_time,
143 	.get_rtc_time		= mpc8xx_get_rtc_time,
144 	.progress		= udbg_progress,
145 };
146