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
init_ioports(void)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
ep88xc_setup_arch(void)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
ep88xc_probe(void)144 static int __init ep88xc_probe(void)
145 {
146 return of_machine_is_compatible("fsl,ep88xc");
147 }
148
149 static const struct of_device_id of_bus_ids[] __initconst = {
150 { .name = "soc", },
151 { .name = "cpm", },
152 { .name = "localbus", },
153 {},
154 };
155
declare_of_platform_devices(void)156 static int __init declare_of_platform_devices(void)
157 {
158 /* Publish the QE devices */
159 of_platform_bus_probe(NULL, of_bus_ids, NULL);
160
161 return 0;
162 }
163 machine_device_initcall(ep88xc, declare_of_platform_devices);
164
define_machine(ep88xc)165 define_machine(ep88xc) {
166 .name = "Embedded Planet EP88xC",
167 .probe = ep88xc_probe,
168 .setup_arch = ep88xc_setup_arch,
169 .init_IRQ = mpc8xx_pics_init,
170 .get_irq = mpc8xx_get_irq,
171 .restart = mpc8xx_restart,
172 .calibrate_decr = mpc8xx_calibrate_decr,
173 .progress = udbg_progress,
174 };
175
