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_platform.h>
19 
20 #include <asm/io.h>
21 #include <asm/machdep.h>
22 #include <asm/time.h>
23 #include <asm/8xx_immap.h>
24 #include <asm/cpm1.h>
25 #include <asm/fs_pd.h>
26 #include <asm/udbg.h>
27 
28 #include "mpc86xads.h"
29 #include "mpc8xx.h"
30 
31 struct cpm_pin {
32 	int port, pin, flags;
33 };
34 
35 static struct cpm_pin mpc866ads_pins[] = {
36 	/* SMC1 */
37 	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
38 	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
39 
40 	/* SMC2 */
41 	{CPM_PORTB, 21, CPM_PIN_INPUT}, /* RX */
42 	{CPM_PORTB, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
43 
44 	/* SCC1 */
45 	{CPM_PORTA, 6, CPM_PIN_INPUT}, /* CLK1 */
46 	{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
47 	{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
48 	{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
49 	{CPM_PORTB, 19, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
50 	{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
51 	{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */
52 
53 	/* MII */
54 	{CPM_PORTD, 3, CPM_PIN_OUTPUT},
55 	{CPM_PORTD, 4, CPM_PIN_OUTPUT},
56 	{CPM_PORTD, 5, CPM_PIN_OUTPUT},
57 	{CPM_PORTD, 6, CPM_PIN_OUTPUT},
58 	{CPM_PORTD, 7, CPM_PIN_OUTPUT},
59 	{CPM_PORTD, 8, CPM_PIN_OUTPUT},
60 	{CPM_PORTD, 9, CPM_PIN_OUTPUT},
61 	{CPM_PORTD, 10, CPM_PIN_OUTPUT},
62 	{CPM_PORTD, 11, CPM_PIN_OUTPUT},
63 	{CPM_PORTD, 12, CPM_PIN_OUTPUT},
64 	{CPM_PORTD, 13, CPM_PIN_OUTPUT},
65 	{CPM_PORTD, 14, CPM_PIN_OUTPUT},
66 	{CPM_PORTD, 15, CPM_PIN_OUTPUT},
67 
68 	/* I2C */
69 	{CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
70 	{CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
71 };
72 
73 static void __init init_ioports(void)
74 {
75 	int i;
76 
77 	for (i = 0; i < ARRAY_SIZE(mpc866ads_pins); i++) {
78 		struct cpm_pin *pin = &mpc866ads_pins[i];
79 		cpm1_set_pin(pin->port, pin->pin, pin->flags);
80 	}
81 
82 	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
83 	cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
84 	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK1, CPM_CLK_TX);
85 	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
86 
87 	/* Set FEC1 and FEC2 to MII mode */
88 	clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
89 }
90 
91 static void __init mpc86xads_setup_arch(void)
92 {
93 	struct device_node *np;
94 	u32 __iomem *bcsr_io;
95 
96 	cpm_reset();
97 	init_ioports();
98 
99 	np = of_find_compatible_node(NULL, NULL, "fsl,mpc866ads-bcsr");
100 	if (!np) {
101 		printk(KERN_CRIT "Could not find fsl,mpc866ads-bcsr node\n");
102 		return;
103 	}
104 
105 	bcsr_io = of_iomap(np, 0);
106 	of_node_put(np);
107 
108 	if (bcsr_io == NULL) {
109 		printk(KERN_CRIT "Could not remap BCSR\n");
110 		return;
111 	}
112 
113 	clrbits32(bcsr_io, BCSR1_RS232EN_1 | BCSR1_RS232EN_2 | BCSR1_ETHEN);
114 	iounmap(bcsr_io);
115 }
116 
117 static int __init mpc86xads_probe(void)
118 {
119 	unsigned long root = of_get_flat_dt_root();
120 	return of_flat_dt_is_compatible(root, "fsl,mpc866ads");
121 }
122 
123 static struct of_device_id __initdata of_bus_ids[] = {
124 	{ .name = "soc", },
125 	{ .name = "cpm", },
126 	{ .name = "localbus", },
127 	{},
128 };
129 
130 static int __init declare_of_platform_devices(void)
131 {
132 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
133 
134 	return 0;
135 }
136 machine_device_initcall(mpc86x_ads, declare_of_platform_devices);
137 
138 define_machine(mpc86x_ads) {
139 	.name			= "MPC86x ADS",
140 	.probe			= mpc86xads_probe,
141 	.setup_arch		= mpc86xads_setup_arch,
142 	.init_IRQ		= mpc8xx_pics_init,
143 	.get_irq		= mpc8xx_get_irq,
144 	.restart		= mpc8xx_restart,
145 	.calibrate_decr		= mpc8xx_calibrate_decr,
146 	.set_rtc_time		= mpc8xx_set_rtc_time,
147 	.get_rtc_time		= mpc8xx_get_rtc_time,
148 	.progress		= udbg_progress,
149 };
150