1/*
2 * Architecture specific OF callbacks.
3 */
4#include <linux/bootmem.h>
5#include <linux/export.h>
6#include <linux/io.h>
7#include <linux/irqdomain.h>
8#include <linux/interrupt.h>
9#include <linux/list.h>
10#include <linux/of.h>
11#include <linux/of_fdt.h>
12#include <linux/of_address.h>
13#include <linux/of_platform.h>
14#include <linux/of_irq.h>
15#include <linux/slab.h>
16#include <linux/pci.h>
17#include <linux/of_pci.h>
18#include <linux/initrd.h>
19
20#include <asm/hpet.h>
21#include <asm/apic.h>
22#include <asm/pci_x86.h>
23#include <asm/setup.h>
24#include <asm/i8259.h>
25
26__initdata u64 initial_dtb;
27char __initdata cmd_line[COMMAND_LINE_SIZE];
28
29int __initdata of_ioapic;
30
31void __init early_init_dt_scan_chosen_arch(unsigned long node)
32{
33	BUG();
34}
35
36void __init early_init_dt_add_memory_arch(u64 base, u64 size)
37{
38	BUG();
39}
40
41void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
42{
43	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
44}
45
46void __init add_dtb(u64 data)
47{
48	initial_dtb = data + offsetof(struct setup_data, data);
49}
50
51/*
52 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
53 */
54static struct of_device_id __initdata ce4100_ids[] = {
55	{ .compatible = "intel,ce4100-cp", },
56	{ .compatible = "isa", },
57	{ .compatible = "pci", },
58	{},
59};
60
61static int __init add_bus_probe(void)
62{
63	if (!of_have_populated_dt())
64		return 0;
65
66	return of_platform_bus_probe(NULL, ce4100_ids, NULL);
67}
68module_init(add_bus_probe);
69
70#ifdef CONFIG_PCI
71struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
72{
73	struct device_node *np;
74
75	for_each_node_by_type(np, "pci") {
76		const void *prop;
77		unsigned int bus_min;
78
79		prop = of_get_property(np, "bus-range", NULL);
80		if (!prop)
81			continue;
82		bus_min = be32_to_cpup(prop);
83		if (bus->number == bus_min)
84			return np;
85	}
86	return NULL;
87}
88
89static int x86_of_pci_irq_enable(struct pci_dev *dev)
90{
91	u32 virq;
92	int ret;
93	u8 pin;
94
95	ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
96	if (ret)
97		return ret;
98	if (!pin)
99		return 0;
100
101	virq = of_irq_parse_and_map_pci(dev, 0, 0);
102	if (virq == 0)
103		return -EINVAL;
104	dev->irq = virq;
105	return 0;
106}
107
108static void x86_of_pci_irq_disable(struct pci_dev *dev)
109{
110}
111
112void x86_of_pci_init(void)
113{
114	pcibios_enable_irq = x86_of_pci_irq_enable;
115	pcibios_disable_irq = x86_of_pci_irq_disable;
116}
117#endif
118
119static void __init dtb_setup_hpet(void)
120{
121#ifdef CONFIG_HPET_TIMER
122	struct device_node *dn;
123	struct resource r;
124	int ret;
125
126	dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
127	if (!dn)
128		return;
129	ret = of_address_to_resource(dn, 0, &r);
130	if (ret) {
131		WARN_ON(1);
132		return;
133	}
134	hpet_address = r.start;
135#endif
136}
137
138static void __init dtb_lapic_setup(void)
139{
140#ifdef CONFIG_X86_LOCAL_APIC
141	struct device_node *dn;
142	struct resource r;
143	int ret;
144
145	dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
146	if (!dn)
147		return;
148
149	ret = of_address_to_resource(dn, 0, &r);
150	if (WARN_ON(ret))
151		return;
152
153	/* Did the boot loader setup the local APIC ? */
154	if (!cpu_has_apic) {
155		if (apic_force_enable(r.start))
156			return;
157	}
158	smp_found_config = 1;
159	pic_mode = 1;
160	register_lapic_address(r.start);
161	generic_processor_info(boot_cpu_physical_apicid,
162			       GET_APIC_VERSION(apic_read(APIC_LVR)));
163#endif
164}
165
166#ifdef CONFIG_X86_IO_APIC
167static unsigned int ioapic_id;
168
169struct of_ioapic_type {
170	u32 out_type;
171	u32 trigger;
172	u32 polarity;
173};
174
175static struct of_ioapic_type of_ioapic_type[] =
176{
177	{
178		.out_type	= IRQ_TYPE_EDGE_RISING,
179		.trigger	= IOAPIC_EDGE,
180		.polarity	= 1,
181	},
182	{
183		.out_type	= IRQ_TYPE_LEVEL_LOW,
184		.trigger	= IOAPIC_LEVEL,
185		.polarity	= 0,
186	},
187	{
188		.out_type	= IRQ_TYPE_LEVEL_HIGH,
189		.trigger	= IOAPIC_LEVEL,
190		.polarity	= 1,
191	},
192	{
193		.out_type	= IRQ_TYPE_EDGE_FALLING,
194		.trigger	= IOAPIC_EDGE,
195		.polarity	= 0,
196	},
197};
198
199static int ioapic_xlate(struct irq_domain *domain,
200			struct device_node *controller,
201			const u32 *intspec, u32 intsize,
202			irq_hw_number_t *out_hwirq, u32 *out_type)
203{
204	struct of_ioapic_type *it;
205	u32 line, idx, gsi;
206
207	if (WARN_ON(intsize < 2))
208		return -EINVAL;
209
210	line = intspec[0];
211
212	if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
213		return -EINVAL;
214
215	it = &of_ioapic_type[intspec[1]];
216
217	idx = (u32)(long)domain->host_data;
218	gsi = mp_pin_to_gsi(idx, line);
219	if (mp_set_gsi_attr(gsi, it->trigger, it->polarity, cpu_to_node(0)))
220		return -EBUSY;
221
222	*out_hwirq = line;
223	*out_type = it->out_type;
224	return 0;
225}
226
227const struct irq_domain_ops ioapic_irq_domain_ops = {
228	.map = mp_irqdomain_map,
229	.unmap = mp_irqdomain_unmap,
230	.xlate = ioapic_xlate,
231};
232
233static void __init dtb_add_ioapic(struct device_node *dn)
234{
235	struct resource r;
236	int ret;
237	struct ioapic_domain_cfg cfg = {
238		.type = IOAPIC_DOMAIN_DYNAMIC,
239		.ops = &ioapic_irq_domain_ops,
240		.dev = dn,
241	};
242
243	ret = of_address_to_resource(dn, 0, &r);
244	if (ret) {
245		printk(KERN_ERR "Can't obtain address from node %s.\n",
246				dn->full_name);
247		return;
248	}
249	mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
250}
251
252static void __init dtb_ioapic_setup(void)
253{
254	struct device_node *dn;
255
256	for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
257		dtb_add_ioapic(dn);
258
259	if (nr_ioapics) {
260		of_ioapic = 1;
261		return;
262	}
263	printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
264}
265#else
266static void __init dtb_ioapic_setup(void) {}
267#endif
268
269static void __init dtb_apic_setup(void)
270{
271	dtb_lapic_setup();
272	dtb_ioapic_setup();
273}
274
275#ifdef CONFIG_OF_FLATTREE
276static void __init x86_flattree_get_config(void)
277{
278	u32 size, map_len;
279	void *dt;
280
281	if (!initial_dtb)
282		return;
283
284	map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
285
286	initial_boot_params = dt = early_memremap(initial_dtb, map_len);
287	size = of_get_flat_dt_size();
288	if (map_len < size) {
289		early_iounmap(dt, map_len);
290		initial_boot_params = dt = early_memremap(initial_dtb, size);
291		map_len = size;
292	}
293
294	unflatten_and_copy_device_tree();
295	early_iounmap(dt, map_len);
296}
297#else
298static inline void x86_flattree_get_config(void) { }
299#endif
300
301void __init x86_dtb_init(void)
302{
303	x86_flattree_get_config();
304
305	if (!of_have_populated_dt())
306		return;
307
308	dtb_setup_hpet();
309	dtb_apic_setup();
310}
311