aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/sysdev/fsl_pci.c
blob: 9817f63723dd592d933c0dcf9de53b6a51805b8d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
/*
 * MPC83xx/85xx/86xx PCI/PCIE support routing.
 *
 * Copyright 2007,2008 Freescale Semiconductor, Inc
 *
 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
 * Recode: ZHANG WEI <wei.zhang@freescale.com>
 * Rewrite the routing for Frescale PCI and PCI Express
 * 	Roy Zang <tie-fei.zang@freescale.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>

#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx)
static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
	unsigned int index, const struct resource *res,
	resource_size_t offset)
{
	resource_size_t pci_addr = res->start - offset;
	resource_size_t phys_addr = res->start;
	resource_size_t size = res->end - res->start + 1;
	u32 flags = 0x80044000; /* enable & mem R/W */
	unsigned int i;

	pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
		(u64)res->start, (u64)size);

	if (res->flags & IORESOURCE_PREFETCH)
		flags |= 0x10000000; /* enable relaxed ordering */

	for (i = 0; size > 0; i++) {
		unsigned int bits = min(__ilog2(size),
					__ffs(pci_addr | phys_addr));

		if (index + i >= 5)
			return -1;

		out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
		out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
		out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
		out_be32(&pci->pow[index + i].powar, flags | (bits - 1));

		pci_addr += (resource_size_t)1U << bits;
		phys_addr += (resource_size_t)1U << bits;
		size -= (resource_size_t)1U << bits;
	}

	return i;
}

/* atmu setup for fsl pci/pcie controller */
static void __init setup_pci_atmu(struct pci_controller *hose,
				  struct resource *rsrc)
{
	struct ccsr_pci __iomem *pci;
	int i, j, n;

	pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
		    (u64)rsrc->start, (u64)rsrc->end - (u64)rsrc->start + 1);
	pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);
	if (!pci) {
	    dev_err(hose->parent, "Unable to map ATMU registers\n");
	    return;
	}

	/* Disable all windows (except powar0 since it's ignored) */
	for(i = 1; i < 5; i++)
		out_be32(&pci->pow[i].powar, 0);
	for(i = 0; i < 3; i++)
		out_be32(&pci->piw[i].piwar, 0);

	/* Setup outbound MEM window */
	for(i = 0, j = 1; i < 3; i++) {
		if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
			continue;

		n = setup_one_atmu(pci, j, &hose->mem_resources[i],
				   hose->pci_mem_offset);

		if (n < 0 || j >= 5) {
			pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
			hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
		} else
			j += n;
	}

	/* Setup outbound IO window */
	if (hose->io_resource.flags & IORESOURCE_IO) {
		if (j >= 5) {
			pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
		} else {
			pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
				 "phy base 0x%016llx.\n",
				(u64)hose->io_resource.start,
				(u64)hose->io_resource.end - (u64)hose->io_resource.start + 1,
				(u64)hose->io_base_phys);
			out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
			out_be32(&pci->pow[j].potear, 0);
			out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
			/* Enable, IO R/W */
			out_be32(&pci->pow[j].powar, 0x80088000
				| (__ilog2(hose->io_resource.end
				- hose->io_resource.start + 1) - 1));
		}
	}

	/* Setup 2G inbound Memory Window @ 1 */
	out_be32(&pci->piw[2].pitar, 0x00000000);
	out_be32(&pci->piw[2].piwbar,0x00000000);
	out_be32(&pci->piw[2].piwar, PIWAR_2G);

	iounmap(pci);
}

static void __init setup_pci_cmd(struct pci_controller *hose)
{
	u16 cmd;
	int cap_x;

	early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
	cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
		| PCI_COMMAND_IO;
	early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);

	cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
	if (cap_x) {
		int pci_x_cmd = cap_x + PCI_X_CMD;
		cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
			| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
		early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
	} else {
		early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
	}
}

static void __init setup_pci_pcsrbar(struct pci_controller *hose)
{
#ifdef CONFIG_PCI_MSI
	phys_addr_t immr_base;

	immr_base = get_immrbase();
	early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, immr_base);
#endif
}

static int fsl_pcie_bus_fixup;

static void __init quirk_fsl_pcie_header(struct pci_dev *dev)
{
	/* if we aren't a PCIe don't bother */
	if (!pci_find_capability(dev, PCI_CAP_ID_EXP))
		return ;

	dev->class = PCI_CLASS_BRIDGE_PCI << 8;
	fsl_pcie_bus_fixup = 1;
	return ;
}

static int __init fsl_pcie_check_link(struct pci_controller *hose)
{
	u32 val;
	early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
	if (val < PCIE_LTSSM_L0)
		return 1;
	return 0;
}

void fsl_pcibios_fixup_bus(struct pci_bus *bus)
{
	struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
	int i;

	if ((bus->parent == hose->bus) &&
	    ((fsl_pcie_bus_fixup &&
	      early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) ||
	     (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)))
	{
		for (i = 0; i < 4; ++i) {
			struct resource *res = bus->resource[i];
			struct resource *par = bus->parent->resource[i];
			if (res) {
				res->start = 0;
				res->end   = 0;
				res->flags = 0;
			}
			if (res && par) {
				res->start = par->start;
				res->end   = par->end;
				res->flags = par->flags;
			}
		}
	}
}

int __init fsl_add_bridge(struct device_node *dev, int is_primary)
{
	int len;
	struct pci_controller *hose;
	struct resource rsrc;
	const int *bus_range;

	pr_debug("Adding PCI host bridge %s\n", dev->full_name);

	/* Fetch host bridge registers address */
	if (of_address_to_resource(dev, 0, &rsrc)) {
		printk(KERN_WARNING "Can't get pci register base!");
		return -ENOMEM;
	}

	/* Get bus range if any */
	bus_range = of_get_property(dev, "bus-range", &len);
	if (bus_range == NULL || len < 2 * sizeof(int))
		printk(KERN_WARNING "Can't get bus-range for %s, assume"
			" bus 0\n", dev->full_name);

	ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
	hose = pcibios_alloc_controller(dev);
	if (!hose)
		return -ENOMEM;

	hose->first_busno = bus_range ? bus_range[0] : 0x0;
	hose->last_busno = bus_range ? bus_range[1] : 0xff;

	setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
		PPC_INDIRECT_TYPE_BIG_ENDIAN);
	setup_pci_cmd(hose);

	/* check PCI express link status */
	if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
		hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
			PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
		if (fsl_pcie_check_link(hose))
			hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
	}

	printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
		"Firmware bus number: %d->%d\n",
		(unsigned long long)rsrc.start, hose->first_busno,
		hose->last_busno);

	pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
		hose, hose->cfg_addr, hose->cfg_data);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, is_primary);

	/* Setup PEX window registers */
	setup_pci_atmu(hose, &rsrc);

	/* Setup PEXCSRBAR */
	setup_pci_pcsrbar(hose);
	return 0;
}

DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8610, quirk_fsl_pcie_header);
#endif /* CONFIG_PPC_85xx || CONFIG_PPC_86xx */

#if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
int __init mpc83xx_add_bridge(struct device_node *dev)
{
	int len;
	struct pci_controller *hose;
	struct resource rsrc_reg;
	struct resource rsrc_cfg;
	const int *bus_range;
	int primary;

	pr_debug("Adding PCI host bridge %s\n", dev->full_name);

	/* Fetch host bridge registers address */
	if (of_address_to_resource(dev, 0, &rsrc_reg)) {
		printk(KERN_WARNING "Can't get pci register base!\n");
		return -ENOMEM;
	}

	memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));

	if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
		printk(KERN_WARNING
			"No pci config register base in dev tree, "
			"using default\n");
		/*
		 * MPC83xx supports up to two host controllers
		 * 	one at 0x8500 has config space registers at 0x8300
		 * 	one at 0x8600 has config space registers at 0x8380
		 */
		if ((rsrc_reg.start & 0xfffff) == 0x8500)
			rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
		else if ((rsrc_reg.start & 0xfffff) == 0x8600)
			rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
	}
	/*
	 * Controller at offset 0x8500 is primary
	 */
	if ((rsrc_reg.start & 0xfffff) == 0x8500)
		primary = 1;
	else
		primary = 0;

	/* Get bus range if any */
	bus_range = of_get_property(dev, "bus-range", &len);
	if (bus_range == NULL || len < 2 * sizeof(int)) {
		printk(KERN_WARNING "Can't get bus-range for %s, assume"
		       " bus 0\n", dev->full_name);
	}

	ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
	hose = pcibios_alloc_controller(dev);
	if (!hose)
		return -ENOMEM;

	hose->first_busno = bus_range ? bus_range[0] : 0;
	hose->last_busno = bus_range ? bus_range[1] : 0xff;

	setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 4, 0);

	printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
	       "Firmware bus number: %d->%d\n",
	       (unsigned long long)rsrc_reg.start, hose->first_busno,
	       hose->last_busno);

	pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
	    hose, hose->cfg_addr, hose->cfg_data);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, primary);

	return 0;
}
#endif /* CONFIG_PPC_83xx */