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_platform.h>
14
15 #include <asm/machdep.h>
16 #include <asm/io.h>
17 #include <asm/udbg.h>
18 #include <asm/cpm1.h>
19
20 #include "mpc8xx.h"
21
22 struct cpm_pin {
23 int port, pin, flags;
24 };
25
26 static struct cpm_pin ep88xc_pins[] = {
27 /* SMC1 */
28 {1, 24, CPM_PIN_INPUT}, /* RX */
29 {1, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
30
31 /* SCC2 */
32 {0, 12, CPM_PIN_INPUT}, /* TX */
33 {0, 13, CPM_PIN_INPUT}, /* RX */
34 {2, 8, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CD */
35 {2, 9, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CTS */
36 {2, 14, CPM_PIN_INPUT}, /* RTS */
37
38 /* MII1 */
39 {0, 0, CPM_PIN_INPUT},
40 {0, 1, CPM_PIN_INPUT},
41 {0, 2, CPM_PIN_INPUT},
42 {0, 3, CPM_PIN_INPUT},
43 {0, 4, CPM_PIN_OUTPUT},
44 {0, 10, CPM_PIN_OUTPUT},
45 {0, 11, CPM_PIN_OUTPUT},
46 {1, 19, CPM_PIN_INPUT},
47 {1, 31, CPM_PIN_INPUT},
48 {2, 12, CPM_PIN_INPUT},
49 {2, 13, CPM_PIN_INPUT},
50 {3, 8, CPM_PIN_INPUT},
51 {4, 30, CPM_PIN_OUTPUT},
52 {4, 31, CPM_PIN_OUTPUT},
53
54 /* MII2 */
55 {4, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
56 {4, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
57 {4, 16, CPM_PIN_OUTPUT},
58 {4, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
59 {4, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
60 {4, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
61 {4, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
62 {4, 21, CPM_PIN_OUTPUT},
63 {4, 22, CPM_PIN_OUTPUT},
64 {4, 23, CPM_PIN_OUTPUT},
65 {4, 24, CPM_PIN_OUTPUT},
66 {4, 25, CPM_PIN_OUTPUT},
67 {4, 26, CPM_PIN_OUTPUT},
68 {4, 27, CPM_PIN_OUTPUT},
69 {4, 28, CPM_PIN_OUTPUT},
70 {4, 29, CPM_PIN_OUTPUT},
71
72 /* USB */
73 {0, 6, CPM_PIN_INPUT}, /* CLK2 */
74 {0, 14, CPM_PIN_INPUT}, /* USBOE */
75 {0, 15, CPM_PIN_INPUT}, /* USBRXD */
76 {2, 6, CPM_PIN_OUTPUT}, /* USBTXN */
77 {2, 7, CPM_PIN_OUTPUT}, /* USBTXP */
78 {2, 10, CPM_PIN_INPUT}, /* USBRXN */
79 {2, 11, CPM_PIN_INPUT}, /* USBRXP */
80
81 /* Misc */
82 {1, 26, CPM_PIN_INPUT}, /* BRGO2 */
83 {1, 27, CPM_PIN_INPUT}, /* BRGO1 */
84 };
85
init_ioports(void)86 static void __init init_ioports(void)
87 {
88 int i;
89
90 for (i = 0; i < ARRAY_SIZE(ep88xc_pins); i++) {
91 struct cpm_pin *pin = &ep88xc_pins[i];
92 cpm1_set_pin(pin->port, pin->pin, pin->flags);
93 }
94
95 cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
96 cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_TX); /* USB */
97 cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
98 cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
99 cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
100 }
101
102 static u8 __iomem *ep88xc_bcsr;
103
104 #define BCSR7_SCC2_ENABLE 0x10
105
106 #define BCSR8_PHY1_ENABLE 0x80
107 #define BCSR8_PHY1_POWER 0x40
108 #define BCSR8_PHY2_ENABLE 0x20
109 #define BCSR8_PHY2_POWER 0x10
110
111 #define BCSR9_USB_ENABLE 0x80
112 #define BCSR9_USB_POWER 0x40
113 #define BCSR9_USB_HOST 0x20
114 #define BCSR9_USB_FULL_SPEED_TARGET 0x10
115
ep88xc_setup_arch(void)116 static void __init ep88xc_setup_arch(void)
117 {
118 struct device_node *np;
119
120 cpm_reset();
121 init_ioports();
122
123 np = of_find_compatible_node(NULL, NULL, "fsl,ep88xc-bcsr");
124 if (!np) {
125 printk(KERN_CRIT "Could not find fsl,ep88xc-bcsr node\n");
126 return;
127 }
128
129 ep88xc_bcsr = of_iomap(np, 0);
130 of_node_put(np);
131
132 if (!ep88xc_bcsr) {
133 printk(KERN_CRIT "Could not remap BCSR\n");
134 return;
135 }
136
137 setbits8(&ep88xc_bcsr[7], BCSR7_SCC2_ENABLE);
138 setbits8(&ep88xc_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
139 BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
140 }
141
ep88xc_probe(void)142 static int __init ep88xc_probe(void)
143 {
144 unsigned long root = of_get_flat_dt_root();
145 return of_flat_dt_is_compatible(root, "fsl,ep88xc");
146 }
147
148 static struct of_device_id __initdata of_bus_ids[] = {
149 { .name = "soc", },
150 { .name = "cpm", },
151 { .name = "localbus", },
152 {},
153 };
154
declare_of_platform_devices(void)155 static int __init declare_of_platform_devices(void)
156 {
157 /* Publish the QE devices */
158 of_platform_bus_probe(NULL, of_bus_ids, NULL);
159
160 return 0;
161 }
162 machine_device_initcall(ep88xc, declare_of_platform_devices);
163
define_machine(ep88xc)164 define_machine(ep88xc) {
165 .name = "Embedded Planet EP88xC",
166 .probe = ep88xc_probe,
167 .setup_arch = ep88xc_setup_arch,
168 .init_IRQ = mpc8xx_pics_init,
169 .get_irq = mpc8xx_get_irq,
170 .restart = mpc8xx_restart,
171 .calibrate_decr = mpc8xx_calibrate_decr,
172 .set_rtc_time = mpc8xx_set_rtc_time,
173 .get_rtc_time = mpc8xx_get_rtc_time,
174 .progress = udbg_progress,
175 };
176