Merge branch 'linus' into timers/hpet
[linux-2.6] / arch / powerpc / platforms / 83xx / mpc836x_mds.c
1 /*
2  * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
3  *
4  * Author: Li Yang <LeoLi@freescale.com>
5  *         Yin Olivia <Hong-hua.Yin@freescale.com>
6  *
7  * Description:
8  * MPC8360E MDS board specific routines.
9  *
10  * Changelog:
11  * Jun 21, 2006 Initial version
12  *
13  * This program is free software; you can redistribute it and/or modify it
14  * under  the terms of  the GNU General  Public License as published by the
15  * Free Software Foundation;  either version 2 of the  License, or (at your
16  * option) any later version.
17  */
18
19 #include <linux/stddef.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/errno.h>
23 #include <linux/reboot.h>
24 #include <linux/pci.h>
25 #include <linux/kdev_t.h>
26 #include <linux/major.h>
27 #include <linux/console.h>
28 #include <linux/delay.h>
29 #include <linux/seq_file.h>
30 #include <linux/root_dev.h>
31 #include <linux/initrd.h>
32 #include <linux/of_platform.h>
33 #include <linux/of_device.h>
34
35 #include <asm/system.h>
36 #include <asm/atomic.h>
37 #include <asm/time.h>
38 #include <asm/io.h>
39 #include <asm/machdep.h>
40 #include <asm/ipic.h>
41 #include <asm/irq.h>
42 #include <asm/prom.h>
43 #include <asm/udbg.h>
44 #include <sysdev/fsl_soc.h>
45 #include <sysdev/fsl_pci.h>
46 #include <asm/qe.h>
47 #include <asm/qe_ic.h>
48
49 #include "mpc83xx.h"
50
51 #undef DEBUG
52 #ifdef DEBUG
53 #define DBG(fmt...) udbg_printf(fmt)
54 #else
55 #define DBG(fmt...)
56 #endif
57
58 static u8 *bcsr_regs = NULL;
59
60 /* ************************************************************************
61  *
62  * Setup the architecture
63  *
64  */
65 static void __init mpc836x_mds_setup_arch(void)
66 {
67         struct device_node *np;
68
69         if (ppc_md.progress)
70                 ppc_md.progress("mpc836x_mds_setup_arch()", 0);
71
72         /* Map BCSR area */
73         np = of_find_node_by_name(NULL, "bcsr");
74         if (np != 0) {
75                 struct resource res;
76
77                 of_address_to_resource(np, 0, &res);
78                 bcsr_regs = ioremap(res.start, res.end - res.start +1);
79                 of_node_put(np);
80         }
81
82 #ifdef CONFIG_PCI
83         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
84                 mpc83xx_add_bridge(np);
85 #endif
86
87 #ifdef CONFIG_QUICC_ENGINE
88         qe_reset();
89
90         if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
91                 par_io_init(np);
92                 of_node_put(np);
93
94                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
95                         par_io_of_config(np);
96         }
97
98         if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
99                         != NULL){
100                 uint svid;
101
102                 /* Reset the Ethernet PHY */
103 #define BCSR9_GETHRST 0x20
104                 clrbits8(&bcsr_regs[9], BCSR9_GETHRST);
105                 udelay(1000);
106                 setbits8(&bcsr_regs[9], BCSR9_GETHRST);
107
108                 /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
109                 svid = mfspr(SPRN_SVR);
110                 if (svid == 0x80480021) {
111                         void __iomem *immap;
112
113                         immap = ioremap(get_immrbase() + 0x14a8, 8);
114
115                         /*
116                          * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
117                          * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
118                          */
119                         setbits32(immap, 0x0c003000);
120
121                         /*
122                          * IMMR + 0x14AC[20:27] = 10101010
123                          * (data delay for both UCC's)
124                          */
125                         clrsetbits_be32(immap + 4, 0xff0, 0xaa0);
126
127                         iounmap(immap);
128                 }
129
130                 iounmap(bcsr_regs);
131                 of_node_put(np);
132         }
133 #endif                          /* CONFIG_QUICC_ENGINE */
134 }
135
136 static struct of_device_id mpc836x_ids[] = {
137         { .type = "soc", },
138         { .compatible = "soc", },
139         { .type = "qe", },
140         { .compatible = "fsl,qe", },
141         {},
142 };
143
144 static int __init mpc836x_declare_of_platform_devices(void)
145 {
146         /* Publish the QE devices */
147         of_platform_bus_probe(NULL, mpc836x_ids, NULL);
148
149         return 0;
150 }
151 machine_device_initcall(mpc836x_mds, mpc836x_declare_of_platform_devices);
152
153 static void __init mpc836x_mds_init_IRQ(void)
154 {
155         struct device_node *np;
156
157         np = of_find_node_by_type(NULL, "ipic");
158         if (!np)
159                 return;
160
161         ipic_init(np, 0);
162
163         /* Initialize the default interrupt mapping priorities,
164          * in case the boot rom changed something on us.
165          */
166         ipic_set_default_priority();
167         of_node_put(np);
168
169 #ifdef CONFIG_QUICC_ENGINE
170         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
171         if (!np) {
172                 np = of_find_node_by_type(NULL, "qeic");
173                 if (!np)
174                         return;
175         }
176         qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
177         of_node_put(np);
178 #endif                          /* CONFIG_QUICC_ENGINE */
179 }
180
181 /*
182  * Called very early, MMU is off, device-tree isn't unflattened
183  */
184 static int __init mpc836x_mds_probe(void)
185 {
186         unsigned long root = of_get_flat_dt_root();
187
188         return of_flat_dt_is_compatible(root, "MPC836xMDS");
189 }
190
191 define_machine(mpc836x_mds) {
192         .name           = "MPC836x MDS",
193         .probe          = mpc836x_mds_probe,
194         .setup_arch     = mpc836x_mds_setup_arch,
195         .init_IRQ       = mpc836x_mds_init_IRQ,
196         .get_irq        = ipic_get_irq,
197         .restart        = mpc83xx_restart,
198         .time_init      = mpc83xx_time_init,
199         .calibrate_decr = generic_calibrate_decr,
200         .progress       = udbg_progress,
201 };