1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  linux/arch/powerpc/platforms/cell/cell_setup.c
4  *
5  *  Copyright (C) 1995  Linus Torvalds
6  *  Adapted from 'alpha' version by Gary Thomas
7  *  Modified by Cort Dougan (cort@cs.nmt.edu)
8  *  Modified by PPC64 Team, IBM Corp
9  *  Modified by Cell Team, IBM Deutschland Entwicklung GmbH
10  */
11 #undef DEBUG
12 
13 #include <linux/sched.h>
14 #include <linux/kernel.h>
15 #include <linux/mm.h>
16 #include <linux/stddef.h>
17 #include <linux/export.h>
18 #include <linux/unistd.h>
19 #include <linux/user.h>
20 #include <linux/reboot.h>
21 #include <linux/init.h>
22 #include <linux/delay.h>
23 #include <linux/irq.h>
24 #include <linux/seq_file.h>
25 #include <linux/root_dev.h>
26 #include <linux/console.h>
27 #include <linux/mutex.h>
28 #include <linux/memory_hotplug.h>
29 #include <linux/of_platform.h>
30 #include <linux/platform_device.h>
31 
32 #include <asm/mmu.h>
33 #include <asm/processor.h>
34 #include <asm/io.h>
35 #include <asm/rtas.h>
36 #include <asm/pci-bridge.h>
37 #include <asm/iommu.h>
38 #include <asm/dma.h>
39 #include <asm/machdep.h>
40 #include <asm/time.h>
41 #include <asm/nvram.h>
42 #include <asm/cputable.h>
43 #include <asm/ppc-pci.h>
44 #include <asm/irq.h>
45 #include <asm/spu.h>
46 #include <asm/spu_priv1.h>
47 #include <asm/udbg.h>
48 #include <asm/mpic.h>
49 #include <asm/cell-regs.h>
50 #include <asm/io-workarounds.h>
51 
52 #include "cell.h"
53 #include "interrupt.h"
54 #include "pervasive.h"
55 #include "ras.h"
56 
57 #ifdef DEBUG
58 #define DBG(fmt...) udbg_printf(fmt)
59 #else
60 #define DBG(fmt...)
61 #endif
62 
63 static void cell_show_cpuinfo(struct seq_file *m)
64 {
65 	struct device_node *root;
66 	const char *model = "";
67 
68 	root = of_find_node_by_path("/");
69 	if (root)
70 		model = of_get_property(root, "model", NULL);
71 	seq_printf(m, "machine\t\t: CHRP %s\n", model);
72 	of_node_put(root);
73 }
74 
75 static void cell_progress(char *s, unsigned short hex)
76 {
77 	printk("*** %04x : %s\n", hex, s ? s : "");
78 }
79 
80 static void cell_fixup_pcie_rootcomplex(struct pci_dev *dev)
81 {
82 	struct pci_controller *hose;
83 	const char *s;
84 	int i;
85 
86 	if (!machine_is(cell))
87 		return;
88 
89 	/* We're searching for a direct child of the PHB */
90 	if (dev->bus->self != NULL || dev->devfn != 0)
91 		return;
92 
93 	hose = pci_bus_to_host(dev->bus);
94 	if (hose == NULL)
95 		return;
96 
97 	/* Only on PCIE */
98 	if (!of_device_is_compatible(hose->dn, "pciex"))
99 		return;
100 
101 	/* And only on axon */
102 	s = of_get_property(hose->dn, "model", NULL);
103 	if (!s || strcmp(s, "Axon") != 0)
104 		return;
105 
106 	for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
107 		dev->resource[i].start = dev->resource[i].end = 0;
108 		dev->resource[i].flags = 0;
109 	}
110 
111 	printk(KERN_DEBUG "PCI: Hiding resources on Axon PCIE RC %s\n",
112 	       pci_name(dev));
113 }
114 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, cell_fixup_pcie_rootcomplex);
115 
116 static int cell_setup_phb(struct pci_controller *phb)
117 {
118 	const char *model;
119 	struct device_node *np;
120 
121 	int rc = rtas_setup_phb(phb);
122 	if (rc)
123 		return rc;
124 
125 	phb->controller_ops = cell_pci_controller_ops;
126 
127 	np = phb->dn;
128 	model = of_get_property(np, "model", NULL);
129 	if (model == NULL || !of_node_name_eq(np, "pci"))
130 		return 0;
131 
132 	/* Setup workarounds for spider */
133 	if (strcmp(model, "Spider"))
134 		return 0;
135 
136 	iowa_register_bus(phb, &spiderpci_ops, &spiderpci_iowa_init,
137 				  (void *)SPIDER_PCI_REG_BASE);
138 	return 0;
139 }
140 
141 static const struct of_device_id cell_bus_ids[] __initconst = {
142 	{ .type = "soc", },
143 	{ .compatible = "soc", },
144 	{ .type = "spider", },
145 	{ .type = "axon", },
146 	{ .type = "plb5", },
147 	{ .type = "plb4", },
148 	{ .type = "opb", },
149 	{ .type = "ebc", },
150 	{},
151 };
152 
153 static int __init cell_publish_devices(void)
154 {
155 	struct device_node *root = of_find_node_by_path("/");
156 	struct device_node *np;
157 	int node;
158 
159 	/* Publish OF platform devices for southbridge IOs */
160 	of_platform_bus_probe(NULL, cell_bus_ids, NULL);
161 
162 	/* On spider based blades, we need to manually create the OF
163 	 * platform devices for the PCI host bridges
164 	 */
165 	for_each_child_of_node(root, np) {
166 		if (!of_node_is_type(np, "pci") && !of_node_is_type(np, "pciex"))
167 			continue;
168 		of_platform_device_create(np, NULL, NULL);
169 	}
170 
171 	of_node_put(root);
172 
173 	/* There is no device for the MIC memory controller, thus we create
174 	 * a platform device for it to attach the EDAC driver to.
175 	 */
176 	for_each_online_node(node) {
177 		if (cbe_get_cpu_mic_tm_regs(cbe_node_to_cpu(node)) == NULL)
178 			continue;
179 		platform_device_register_simple("cbe-mic", node, NULL, 0);
180 	}
181 
182 	return 0;
183 }
184 machine_subsys_initcall(cell, cell_publish_devices);
185 
186 static void __init mpic_init_IRQ(void)
187 {
188 	struct device_node *dn;
189 	struct mpic *mpic;
190 
191 	for_each_node_by_name(dn, "interrupt-controller") {
192 		if (!of_device_is_compatible(dn, "CBEA,platform-open-pic"))
193 			continue;
194 
195 		/* The MPIC driver will get everything it needs from the
196 		 * device-tree, just pass 0 to all arguments
197 		 */
198 		mpic = mpic_alloc(dn, 0, MPIC_SECONDARY | MPIC_NO_RESET,
199 				0, 0, " MPIC     ");
200 		if (mpic == NULL)
201 			continue;
202 		mpic_init(mpic);
203 	}
204 }
205 
206 
207 static void __init cell_init_irq(void)
208 {
209 	iic_init_IRQ();
210 	spider_init_IRQ();
211 	mpic_init_IRQ();
212 }
213 
214 static void __init cell_set_dabrx(void)
215 {
216 	mtspr(SPRN_DABRX, DABRX_KERNEL | DABRX_USER);
217 }
218 
219 static void __init cell_setup_arch(void)
220 {
221 #ifdef CONFIG_SPU_BASE
222 	spu_priv1_ops = &spu_priv1_mmio_ops;
223 	spu_management_ops = &spu_management_of_ops;
224 #endif
225 
226 	cbe_regs_init();
227 
228 	cell_set_dabrx();
229 
230 #ifdef CONFIG_CBE_RAS
231 	cbe_ras_init();
232 #endif
233 
234 #ifdef CONFIG_SMP
235 	smp_init_cell();
236 #endif
237 	/* init to some ~sane value until calibrate_delay() runs */
238 	loops_per_jiffy = 50000000;
239 
240 	/* Find and initialize PCI host bridges */
241 	init_pci_config_tokens();
242 
243 	cbe_pervasive_init();
244 
245 	mmio_nvram_init();
246 }
247 
248 static int __init cell_probe(void)
249 {
250 	if (!of_machine_is_compatible("IBM,CBEA") &&
251 	    !of_machine_is_compatible("IBM,CPBW-1.0"))
252 		return 0;
253 
254 	pm_power_off = rtas_power_off;
255 
256 	return 1;
257 }
258 
259 define_machine(cell) {
260 	.name			= "Cell",
261 	.probe			= cell_probe,
262 	.setup_arch		= cell_setup_arch,
263 	.show_cpuinfo		= cell_show_cpuinfo,
264 	.restart		= rtas_restart,
265 	.halt			= rtas_halt,
266 	.get_boot_time		= rtas_get_boot_time,
267 	.get_rtc_time		= rtas_get_rtc_time,
268 	.set_rtc_time		= rtas_set_rtc_time,
269 	.progress		= cell_progress,
270 	.init_IRQ       	= cell_init_irq,
271 	.pci_setup_phb		= cell_setup_phb,
272 };
273 
274 struct pci_controller_ops cell_pci_controller_ops;
275