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
cpm2_cascade(unsigned int irq,struct irq_desc * desc)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
sbc8560_pic_init(void)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
init_ioports(void)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
sbc8560_setup_arch(void)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
sbc8560_show_cpuinfo(struct seq_file * m)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
declare_of_platform_devices(void)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 */
sbc8560_probe(void)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
sbc8560_rtc_init(void)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
define_machine(sbc8560)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 };
280