Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
[linux-2.6] / arch / powerpc / platforms / 85xx / sbc8560.c
1 /*
2  * Wind River SBC8560 setup and early boot code.
3  *
4  * Copyright 2007 Wind River Systems Inc.
5  *
6  * By Paul Gortmaker (see MAINTAINERS for contact information)
7  *
8  * Based largely on the MPC8560ADS support - Copyright 2005 Freescale 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/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/pci.h>
19 #include <linux/kdev_t.h>
20 #include <linux/delay.h>
21 #include <linux/seq_file.h>
22 #include <linux/of_platform.h>
23
24 #include <asm/system.h>
25 #include <asm/time.h>
26 #include <asm/machdep.h>
27 #include <asm/pci-bridge.h>
28 #include <asm/mpic.h>
29 #include <mm/mmu_decl.h>
30 #include <asm/udbg.h>
31
32 #include <sysdev/fsl_soc.h>
33 #include <sysdev/fsl_pci.h>
34
35 #ifdef CONFIG_CPM2
36 #include <asm/cpm2.h>
37 #include <sysdev/cpm2_pic.h>
38 #endif
39
40 #ifdef CONFIG_CPM2
41
42 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
43 {
44         int cascade_irq;
45
46         while ((cascade_irq = cpm2_get_irq()) >= 0)
47                 generic_handle_irq(cascade_irq);
48
49         desc->chip->eoi(irq);
50 }
51
52 #endif /* CONFIG_CPM2 */
53
54 static void __init sbc8560_pic_init(void)
55 {
56         struct mpic *mpic;
57         struct resource r;
58         struct device_node *np = NULL;
59 #ifdef CONFIG_CPM2
60         int irq;
61 #endif
62
63         np = of_find_node_by_type(np, "open-pic");
64         if (!np) {
65                 printk(KERN_ERR "Could not find open-pic node\n");
66                 return;
67         }
68
69         if (of_address_to_resource(np, 0, &r)) {
70                 printk(KERN_ERR "Could not map mpic register space\n");
71                 of_node_put(np);
72                 return;
73         }
74
75         mpic = mpic_alloc(np, r.start,
76                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
77                         0, 256, " OpenPIC  ");
78         BUG_ON(mpic == NULL);
79         of_node_put(np);
80
81         mpic_init(mpic);
82
83 #ifdef CONFIG_CPM2
84         /* Setup CPM2 PIC */
85         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
86         if (np == NULL) {
87                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
88                 return;
89         }
90         irq = irq_of_parse_and_map(np, 0);
91
92         cpm2_pic_init(np);
93         of_node_put(np);
94         set_irq_chained_handler(irq, cpm2_cascade);
95 #endif
96 }
97
98 /*
99  * Setup the architecture
100  */
101 #ifdef CONFIG_CPM2
102 struct cpm_pin {
103         int port, pin, flags;
104 };
105
106 static const struct cpm_pin sbc8560_pins[] = {
107         /* SCC1 */
108         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
109         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
110         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
111
112         /* SCC2 */
113         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
114         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
115         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
116
117         /* FCC2 */
118         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
119         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
120         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
121         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
122         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
123         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
124         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
125         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
126         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
127         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
128         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
129         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
130         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
131         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
132         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK14 */
133         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK13 */
134
135         /* FCC3 */
136         {1, 4, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
137         {1, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
138         {1, 6, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
139         {1, 7, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
140         {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
141         {1, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
142         {1, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
143         {1, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
144         {1, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
145         {1, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
146         {1, 14, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
147         {1, 15, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
148         {1, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
149         {1, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
150         {2, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* CLK16 */
151         {2, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* CLK15 */
152 };
153
154 static void __init init_ioports(void)
155 {
156         int i;
157
158         for (i = 0; i < ARRAY_SIZE(sbc8560_pins); i++) {
159                 const struct cpm_pin *pin = &sbc8560_pins[i];
160                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
161         }
162
163         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
164         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
165         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
166         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
167         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
168         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
169         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK15, CPM_CLK_RX);
170         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK16, CPM_CLK_TX);
171 }
172 #endif
173
174 static void __init sbc8560_setup_arch(void)
175 {
176 #ifdef CONFIG_PCI
177         struct device_node *np;
178 #endif
179
180         if (ppc_md.progress)
181                 ppc_md.progress("sbc8560_setup_arch()", 0);
182
183 #ifdef CONFIG_CPM2
184         cpm2_reset();
185         init_ioports();
186 #endif
187
188 #ifdef CONFIG_PCI
189         for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
190                 fsl_add_bridge(np, 1);
191 #endif
192 }
193
194 static void sbc8560_show_cpuinfo(struct seq_file *m)
195 {
196         uint pvid, svid, phid1;
197
198         pvid = mfspr(SPRN_PVR);
199         svid = mfspr(SPRN_SVR);
200
201         seq_printf(m, "Vendor\t\t: Wind River\n");
202         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
203         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
204
205         /* Display cpu Pll setting */
206         phid1 = mfspr(SPRN_HID1);
207         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
208 }
209
210 static struct of_device_id __initdata of_bus_ids[] = {
211         { .name = "soc", },
212         { .type = "soc", },
213         { .name = "cpm", },
214         { .name = "localbus", },
215         { .compatible = "simple-bus", },
216         {},
217 };
218
219 static int __init declare_of_platform_devices(void)
220 {
221         of_platform_bus_probe(NULL, of_bus_ids, NULL);
222
223         return 0;
224 }
225 machine_device_initcall(sbc8560, declare_of_platform_devices);
226
227 /*
228  * Called very early, device-tree isn't unflattened
229  */
230 static int __init sbc8560_probe(void)
231 {
232         unsigned long root = of_get_flat_dt_root();
233
234         return of_flat_dt_is_compatible(root, "SBC8560");
235 }
236
237 #ifdef CONFIG_RTC_DRV_M48T59
238 static int __init sbc8560_rtc_init(void)
239 {
240         struct device_node *np;
241         struct resource res;
242         struct platform_device *rtc_dev;
243
244         np = of_find_compatible_node(NULL, NULL, "m48t59");
245         if (np == NULL) {
246                 printk("No RTC in DTB. Has it been eaten by wild dogs?\n");
247                 return -ENODEV;
248         }
249
250         of_address_to_resource(np, 0, &res);
251         of_node_put(np);
252
253         printk("Found RTC (m48t59) at i/o 0x%x\n", res.start);
254
255         rtc_dev = platform_device_register_simple("rtc-m48t59", 0, &res, 1);
256
257         if (IS_ERR(rtc_dev)) {
258                 printk("Registering sbc8560 RTC device failed\n");
259                 return PTR_ERR(rtc_dev);
260         }
261
262         return 0;
263 }
264
265 arch_initcall(sbc8560_rtc_init);
266
267 #endif  /* M48T59 */
268
269 define_machine(sbc8560) {
270         .name                   = "SBC8560",
271         .probe                  = sbc8560_probe,
272         .setup_arch             = sbc8560_setup_arch,
273         .init_IRQ               = sbc8560_pic_init,
274         .show_cpuinfo           = sbc8560_show_cpuinfo,
275         .get_irq                = mpic_get_irq,
276         .restart                = fsl_rstcr_restart,
277         .calibrate_decr         = generic_calibrate_decr,
278         .progress               = udbg_progress,
279 };