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20#include <linux/init.h>
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#include <linux/rtc.h>
24
25#include <asm/machdep.h>
26#include <asm/prom.h>
27#include <asm/udbg.h>
28#include <asm/time.h>
29#include <asm/uic.h>
30#include <asm/ppc4xx.h>
31#include <asm/mpic.h>
32#include <asm/mmu.h>
33#include <asm/swiotlb.h>
34
35#include <linux/pci.h>
36#include <linux/i2c.h>
37
38static const struct of_device_id ppc47x_of_bus[] __initconst = {
39 { .compatible = "ibm,plb4", },
40 { .compatible = "ibm,plb6", },
41 { .compatible = "ibm,opb", },
42 { .compatible = "ibm,ebc", },
43 {},
44};
45
46
47
48static void quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
49{
50 if (of_machine_is_compatible("ibm,currituck")) {
51 pci_write_config_dword(dev, 0xe0, 0x0114231f);
52 pci_write_config_dword(dev, 0xe4, 0x00006c40);
53 }
54}
55DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
56
57
58
59
60
61#define AVR_PWRCTL_CMD (0x26)
62
63
64#define AVR_PWRCTL_PWROFF (0x01)
65#define AVR_PWRCTL_RESET (0x02)
66
67static struct i2c_client *avr_i2c_client;
68static void __noreturn avr_halt_system(int pwrctl_flags)
69{
70
71 i2c_smbus_write_byte_data(avr_i2c_client,
72 AVR_PWRCTL_CMD, pwrctl_flags);
73
74
75 while (1)
76 ;
77}
78
79static void avr_power_off_system(void)
80{
81 avr_halt_system(AVR_PWRCTL_PWROFF);
82}
83
84static void __noreturn avr_reset_system(char *cmd)
85{
86 avr_halt_system(AVR_PWRCTL_RESET);
87}
88
89static int avr_probe(struct i2c_client *client)
90{
91 avr_i2c_client = client;
92 ppc_md.restart = avr_reset_system;
93 pm_power_off = avr_power_off_system;
94 return 0;
95}
96
97static const struct i2c_device_id avr_id[] = {
98 { "akebono-avr", 0 },
99 { }
100};
101
102static struct i2c_driver avr_driver = {
103 .driver = {
104 .name = "akebono-avr",
105 },
106 .probe_new = avr_probe,
107 .id_table = avr_id,
108};
109
110static int __init ppc47x_device_probe(void)
111{
112 i2c_add_driver(&avr_driver);
113 of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
114
115 return 0;
116}
117machine_device_initcall(ppc47x, ppc47x_device_probe);
118
119static void __init ppc47x_init_irq(void)
120{
121 struct device_node *np;
122
123
124 for_each_node_with_property(np, "interrupt-controller") {
125 if (of_get_property(np, "interrupts", NULL) == NULL)
126 break;
127 }
128 if (np == NULL)
129 panic("Can't find top level interrupt controller");
130
131
132 if (of_device_is_compatible(np, "chrp,open-pic")) {
133
134
135
136 struct mpic *mpic =
137 mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC ");
138 BUG_ON(mpic == NULL);
139 mpic_init(mpic);
140 ppc_md.get_irq = mpic_get_irq;
141 } else
142 panic("Unrecognized top level interrupt controller");
143}
144
145#ifdef CONFIG_SMP
146static void smp_ppc47x_setup_cpu(int cpu)
147{
148 mpic_setup_this_cpu();
149}
150
151static int smp_ppc47x_kick_cpu(int cpu)
152{
153 struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
154 const u64 *spin_table_addr_prop;
155 u32 *spin_table;
156 extern void start_secondary_47x(void);
157
158 BUG_ON(cpunode == NULL);
159
160
161
162
163
164 spin_table_addr_prop =
165 of_get_property(cpunode, "cpu-release-addr", NULL);
166
167 if (spin_table_addr_prop == NULL) {
168 pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
169 cpu);
170 return 1;
171 }
172
173
174
175
176
177
178 spin_table = (u32 *)__va(*spin_table_addr_prop);
179 pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
180
181 spin_table[3] = cpu;
182 smp_wmb();
183 spin_table[1] = __pa(start_secondary_47x);
184 mb();
185
186 return 0;
187}
188
189static struct smp_ops_t ppc47x_smp_ops = {
190 .probe = smp_mpic_probe,
191 .message_pass = smp_mpic_message_pass,
192 .setup_cpu = smp_ppc47x_setup_cpu,
193 .kick_cpu = smp_ppc47x_kick_cpu,
194 .give_timebase = smp_generic_give_timebase,
195 .take_timebase = smp_generic_take_timebase,
196};
197
198static void __init ppc47x_smp_init(void)
199{
200 if (mmu_has_feature(MMU_FTR_TYPE_47x))
201 smp_ops = &ppc47x_smp_ops;
202}
203
204#else
205static void __init ppc47x_smp_init(void) { }
206#endif
207
208static void __init ppc47x_setup_arch(void)
209{
210
211
212
213 swiotlb_detect_4g();
214
215 ppc47x_smp_init();
216}
217
218static int board_rev = -1;
219static int __init ppc47x_get_board_rev(void)
220{
221 int reg;
222 u8 __iomem *fpga;
223 struct device_node *np = NULL;
224
225 if (of_machine_is_compatible("ibm,currituck")) {
226 np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
227 reg = 0;
228 } else if (of_machine_is_compatible("ibm,akebono")) {
229 np = of_find_compatible_node(NULL, NULL, "ibm,akebono-fpga");
230 reg = 2;
231 }
232
233 if (!np)
234 goto fail;
235
236 fpga = of_iomap(np, 0);
237 of_node_put(np);
238 if (!fpga)
239 goto fail;
240
241 board_rev = ioread8(fpga + reg) & 0x03;
242 pr_info("%s: Found board revision %d\n", __func__, board_rev);
243 iounmap(fpga);
244 return 0;
245
246fail:
247 pr_info("%s: Unable to find board revision\n", __func__);
248 return 0;
249}
250machine_arch_initcall(ppc47x, ppc47x_get_board_rev);
251
252
253static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
254{
255 if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
256 dev->device == 0x00e0)) {
257 if (board_rev == 0) {
258 dev->irq = irq_create_mapping(NULL, 47);
259 pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
260 } else if (board_rev == 2) {
261 dev->irq = irq_create_mapping(NULL, 49);
262 pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
263 } else {
264 pr_alert("%s: Unknown board revision\n", __func__);
265 }
266 }
267}
268
269
270
271
272static int __init ppc47x_probe(void)
273{
274 if (of_machine_is_compatible("ibm,akebono"))
275 return 1;
276
277 if (of_machine_is_compatible("ibm,currituck")) {
278 ppc_md.pci_irq_fixup = ppc47x_pci_irq_fixup;
279 return 1;
280 }
281
282 return 0;
283}
284
285define_machine(ppc47x) {
286 .name = "PowerPC 47x",
287 .probe = ppc47x_probe,
288 .progress = udbg_progress,
289 .init_IRQ = ppc47x_init_irq,
290 .setup_arch = ppc47x_setup_arch,
291 .restart = ppc4xx_reset_system,
292 .calibrate_decr = generic_calibrate_decr,
293};
294
