Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / arch / powerpc / platforms / 82xx / mpc8272_ads.c
1 /*
2  * MPC8272 ADS board support
3  *
4  * Copyright 2007 Freescale Semiconductor, Inc.
5  * Author: Scott Wood <scottwood@freescale.com>
6  *
7  * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
8  * Copyright (c) 2006 MontaVista Software, Inc.
9  *
10  * This program is free software; you can redistribute  it and/or modify it
11  * under  the terms of  the GNU General  Public License as published by the
12  * Free Software Foundation;  either version 2 of the  License, or (at your
13  * option) any later version.
14  */
15
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/fsl_devices.h>
19 #include <linux/of_platform.h>
20 #include <linux/io.h>
21
22 #include <asm/cpm2.h>
23 #include <asm/udbg.h>
24 #include <asm/machdep.h>
25 #include <asm/time.h>
26
27 #include <platforms/82xx/pq2.h>
28
29 #include <sysdev/fsl_soc.h>
30 #include <sysdev/cpm2_pic.h>
31
32 #include "pq2ads.h"
33 #include "pq2.h"
34
35 static void __init mpc8272_ads_pic_init(void)
36 {
37         struct device_node *np = of_find_compatible_node(NULL, NULL,
38                                                          "fsl,cpm2-pic");
39         if (!np) {
40                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
41                 return;
42         }
43
44         cpm2_pic_init(np);
45         of_node_put(np);
46
47         /* Initialize stuff for the 82xx CPLD IC and install demux  */
48         pq2ads_pci_init_irq();
49 }
50
51 struct cpm_pin {
52         int port, pin, flags;
53 };
54
55 static struct cpm_pin mpc8272_ads_pins[] = {
56         /* SCC1 */
57         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
58         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
59
60         /* SCC4 */
61         {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
62         {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
63
64         /* FCC1 */
65         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
66         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
67         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
68         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
69         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
70         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
71         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
72         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
73         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
74         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
75         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
76         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
77         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
78         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
79         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
80         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
81
82         /* FCC2 */
83         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
84         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
85         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
86         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
87         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
88         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
89         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
90         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
91         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
92         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
93         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
94         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
95         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
96         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
97         {2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
98         {2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
99
100         /* I2C */
101         {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
102         {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
103 };
104
105 static void __init init_ioports(void)
106 {
107         int i;
108
109         for (i = 0; i < ARRAY_SIZE(mpc8272_ads_pins); i++) {
110                 struct cpm_pin *pin = &mpc8272_ads_pins[i];
111                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
112         }
113
114         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
115         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
116         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_RX);
117         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_TX);
118         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
119         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
120         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK15, CPM_CLK_RX);
121         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK16, CPM_CLK_TX);
122 }
123
124 static void __init mpc8272_ads_setup_arch(void)
125 {
126         struct device_node *np;
127         __be32 __iomem *bcsr;
128
129         if (ppc_md.progress)
130                 ppc_md.progress("mpc8272_ads_setup_arch()", 0);
131
132         cpm2_reset();
133
134         np = of_find_compatible_node(NULL, NULL, "fsl,mpc8272ads-bcsr");
135         if (!np) {
136                 printk(KERN_ERR "No bcsr in device tree\n");
137                 return;
138         }
139
140         bcsr = of_iomap(np, 0);
141         of_node_put(np);
142         if (!bcsr) {
143                 printk(KERN_ERR "Cannot map BCSR registers\n");
144                 return;
145         }
146
147         clrbits32(&bcsr[1], BCSR1_RS232_EN1 | BCSR1_RS232_EN2 | BCSR1_FETHIEN);
148         setbits32(&bcsr[1], BCSR1_FETH_RST);
149
150         clrbits32(&bcsr[3], BCSR3_FETHIEN2);
151         setbits32(&bcsr[3], BCSR3_FETH2_RST);
152
153         iounmap(bcsr);
154
155         init_ioports();
156         pq2_init_pci();
157
158         if (ppc_md.progress)
159                 ppc_md.progress("mpc8272_ads_setup_arch(), finish", 0);
160 }
161
162 static struct of_device_id __initdata of_bus_ids[] = {
163         { .name = "soc", },
164         { .name = "cpm", },
165         { .name = "localbus", },
166         {},
167 };
168
169 static int __init declare_of_platform_devices(void)
170 {
171         /* Publish the QE devices */
172         of_platform_bus_probe(NULL, of_bus_ids, NULL);
173         return 0;
174 }
175 machine_device_initcall(mpc8272_ads, declare_of_platform_devices);
176
177 /*
178  * Called very early, device-tree isn't unflattened
179  */
180 static int __init mpc8272_ads_probe(void)
181 {
182         unsigned long root = of_get_flat_dt_root();
183         return of_flat_dt_is_compatible(root, "fsl,mpc8272ads");
184 }
185
186 define_machine(mpc8272_ads)
187 {
188         .name = "Freescale MPC8272 ADS",
189         .probe = mpc8272_ads_probe,
190         .setup_arch = mpc8272_ads_setup_arch,
191         .init_IRQ = mpc8272_ads_pic_init,
192         .get_irq = cpm2_get_irq,
193         .calibrate_decr = generic_calibrate_decr,
194         .restart = pq2_restart,
195         .progress = udbg_progress,
196 };