1 /*
2  * Platform setup for the Embedded Planet EP88xC board
3  *
4  * Author: Scott Wood <scottwood@freescale.com>
5  * Copyright 2007 Freescale Semiconductor, Inc.
6  *
7  * This file is licensed under the terms of the GNU General Public License
8  * version 2. This program is licensed "as is" without any warranty of any
9  * kind, whether express or implied.
10  */
11 
12 #include <linux/init.h>
13 #include <linux/of_address.h>
14 #include <linux/of_fdt.h>
15 #include <linux/of_platform.h>
16 
17 #include <asm/machdep.h>
18 #include <asm/io.h>
19 #include <asm/udbg.h>
20 #include <asm/cpm1.h>
21 
22 #include "mpc8xx.h"
23 
24 struct cpm_pin {
25 	int port, pin, flags;
26 };
27 
28 static struct cpm_pin ep88xc_pins[] = {
29 	/* SMC1 */
30 	{1, 24, CPM_PIN_INPUT}, /* RX */
31 	{1, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
32 
33 	/* SCC2 */
34 	{0, 12, CPM_PIN_INPUT}, /* TX */
35 	{0, 13, CPM_PIN_INPUT}, /* RX */
36 	{2, 8, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CD */
37 	{2, 9, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CTS */
38 	{2, 14, CPM_PIN_INPUT}, /* RTS */
39 
40 	/* MII1 */
41 	{0, 0, CPM_PIN_INPUT},
42 	{0, 1, CPM_PIN_INPUT},
43 	{0, 2, CPM_PIN_INPUT},
44 	{0, 3, CPM_PIN_INPUT},
45 	{0, 4, CPM_PIN_OUTPUT},
46 	{0, 10, CPM_PIN_OUTPUT},
47 	{0, 11, CPM_PIN_OUTPUT},
48 	{1, 19, CPM_PIN_INPUT},
49 	{1, 31, CPM_PIN_INPUT},
50 	{2, 12, CPM_PIN_INPUT},
51 	{2, 13, CPM_PIN_INPUT},
52 	{3, 8, CPM_PIN_INPUT},
53 	{4, 30, CPM_PIN_OUTPUT},
54 	{4, 31, CPM_PIN_OUTPUT},
55 
56 	/* MII2 */
57 	{4, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
58 	{4, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
59 	{4, 16, CPM_PIN_OUTPUT},
60 	{4, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
61 	{4, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
62 	{4, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
63 	{4, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
64 	{4, 21, CPM_PIN_OUTPUT},
65 	{4, 22, CPM_PIN_OUTPUT},
66 	{4, 23, CPM_PIN_OUTPUT},
67 	{4, 24, CPM_PIN_OUTPUT},
68 	{4, 25, CPM_PIN_OUTPUT},
69 	{4, 26, CPM_PIN_OUTPUT},
70 	{4, 27, CPM_PIN_OUTPUT},
71 	{4, 28, CPM_PIN_OUTPUT},
72 	{4, 29, CPM_PIN_OUTPUT},
73 
74 	/* USB */
75 	{0, 6, CPM_PIN_INPUT},  /* CLK2 */
76 	{0, 14, CPM_PIN_INPUT}, /* USBOE */
77 	{0, 15, CPM_PIN_INPUT}, /* USBRXD */
78 	{2, 6, CPM_PIN_OUTPUT}, /* USBTXN */
79 	{2, 7, CPM_PIN_OUTPUT}, /* USBTXP */
80 	{2, 10, CPM_PIN_INPUT}, /* USBRXN */
81 	{2, 11, CPM_PIN_INPUT}, /* USBRXP */
82 
83 	/* Misc */
84 	{1, 26, CPM_PIN_INPUT}, /* BRGO2 */
85 	{1, 27, CPM_PIN_INPUT}, /* BRGO1 */
86 };
87 
88 static void __init init_ioports(void)
89 {
90 	int i;
91 
92 	for (i = 0; i < ARRAY_SIZE(ep88xc_pins); i++) {
93 		struct cpm_pin *pin = &ep88xc_pins[i];
94 		cpm1_set_pin(pin->port, pin->pin, pin->flags);
95 	}
96 
97 	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
98 	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_TX); /* USB */
99 	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
100 	cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
101 	cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
102 }
103 
104 static u8 __iomem *ep88xc_bcsr;
105 
106 #define BCSR7_SCC2_ENABLE 0x10
107 
108 #define BCSR8_PHY1_ENABLE 0x80
109 #define BCSR8_PHY1_POWER  0x40
110 #define BCSR8_PHY2_ENABLE 0x20
111 #define BCSR8_PHY2_POWER  0x10
112 
113 #define BCSR9_USB_ENABLE  0x80
114 #define BCSR9_USB_POWER   0x40
115 #define BCSR9_USB_HOST    0x20
116 #define BCSR9_USB_FULL_SPEED_TARGET 0x10
117 
118 static void __init ep88xc_setup_arch(void)
119 {
120 	struct device_node *np;
121 
122 	cpm_reset();
123 	init_ioports();
124 
125 	np = of_find_compatible_node(NULL, NULL, "fsl,ep88xc-bcsr");
126 	if (!np) {
127 		printk(KERN_CRIT "Could not find fsl,ep88xc-bcsr node\n");
128 		return;
129 	}
130 
131 	ep88xc_bcsr = of_iomap(np, 0);
132 	of_node_put(np);
133 
134 	if (!ep88xc_bcsr) {
135 		printk(KERN_CRIT "Could not remap BCSR\n");
136 		return;
137 	}
138 
139 	setbits8(&ep88xc_bcsr[7], BCSR7_SCC2_ENABLE);
140 	setbits8(&ep88xc_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
141 	                          BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
142 }
143 
144 static int __init ep88xc_probe(void)
145 {
146 	unsigned long root = of_get_flat_dt_root();
147 	return of_flat_dt_is_compatible(root, "fsl,ep88xc");
148 }
149 
150 static const struct of_device_id of_bus_ids[] __initconst = {
151 	{ .name = "soc", },
152 	{ .name = "cpm", },
153 	{ .name = "localbus", },
154 	{},
155 };
156 
157 static int __init declare_of_platform_devices(void)
158 {
159 	/* Publish the QE devices */
160 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
161 
162 	return 0;
163 }
164 machine_device_initcall(ep88xc, declare_of_platform_devices);
165 
166 define_machine(ep88xc) {
167 	.name = "Embedded Planet EP88xC",
168 	.probe = ep88xc_probe,
169 	.setup_arch = ep88xc_setup_arch,
170 	.init_IRQ = mpc8xx_pics_init,
171 	.get_irq	= mpc8xx_get_irq,
172 	.restart = mpc8xx_restart,
173 	.calibrate_decr = mpc8xx_calibrate_decr,
174 	.set_rtc_time = mpc8xx_set_rtc_time,
175 	.get_rtc_time = mpc8xx_get_rtc_time,
176 	.progress = udbg_progress,
177 };
178