1 /*
2 * Atheros AR71XX/AR724X specific PCI setup code
3 *
4 * Copyright (C) 2011 René Bolldorf <xsecute@googlemail.com>
5 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 *
8 * Parts of this file are based on Atheros' 2.6.15 BSP
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 version 2 as published
12 * by the Free Software Foundation.
13 */
14
15 #include <linux/init.h>
16 #include <linux/pci.h>
17 #include <linux/resource.h>
18 #include <linux/platform_device.h>
19 #include <asm/mach-ath79/ar71xx_regs.h>
20 #include <asm/mach-ath79/ath79.h>
21 #include <asm/mach-ath79/irq.h>
22 #include "pci.h"
23
24 static int (*ath79_pci_plat_dev_init)(struct pci_dev *dev);
25 static const struct ath79_pci_irq *ath79_pci_irq_map;
26 static unsigned ath79_pci_nr_irqs;
27
28 static const struct ath79_pci_irq ar71xx_pci_irq_map[] = {
29 {
30 .slot = 17,
31 .pin = 1,
32 .irq = ATH79_PCI_IRQ(0),
33 }, {
34 .slot = 18,
35 .pin = 1,
36 .irq = ATH79_PCI_IRQ(1),
37 }, {
38 .slot = 19,
39 .pin = 1,
40 .irq = ATH79_PCI_IRQ(2),
41 }
42 };
43
44 static const struct ath79_pci_irq ar724x_pci_irq_map[] = {
45 {
46 .slot = 0,
47 .pin = 1,
48 .irq = ATH79_PCI_IRQ(0),
49 }
50 };
51
52 static const struct ath79_pci_irq qca955x_pci_irq_map[] = {
53 {
54 .bus = 0,
55 .slot = 0,
56 .pin = 1,
57 .irq = ATH79_PCI_IRQ(0),
58 },
59 {
60 .bus = 1,
61 .slot = 0,
62 .pin = 1,
63 .irq = ATH79_PCI_IRQ(1),
64 },
65 };
66
pcibios_map_irq(const struct pci_dev * dev,uint8_t slot,uint8_t pin)67 int pcibios_map_irq(const struct pci_dev *dev, uint8_t slot, uint8_t pin)
68 {
69 int irq = -1;
70 int i;
71
72 if (ath79_pci_nr_irqs == 0 ||
73 ath79_pci_irq_map == NULL) {
74 if (soc_is_ar71xx()) {
75 ath79_pci_irq_map = ar71xx_pci_irq_map;
76 ath79_pci_nr_irqs = ARRAY_SIZE(ar71xx_pci_irq_map);
77 } else if (soc_is_ar724x() ||
78 soc_is_ar9342() ||
79 soc_is_ar9344()) {
80 ath79_pci_irq_map = ar724x_pci_irq_map;
81 ath79_pci_nr_irqs = ARRAY_SIZE(ar724x_pci_irq_map);
82 } else if (soc_is_qca955x()) {
83 ath79_pci_irq_map = qca955x_pci_irq_map;
84 ath79_pci_nr_irqs = ARRAY_SIZE(qca955x_pci_irq_map);
85 } else {
86 pr_crit("pci %s: invalid irq map\n",
87 pci_name((struct pci_dev *) dev));
88 return irq;
89 }
90 }
91
92 for (i = 0; i < ath79_pci_nr_irqs; i++) {
93 const struct ath79_pci_irq *entry;
94
95 entry = &ath79_pci_irq_map[i];
96 if (entry->bus == dev->bus->number &&
97 entry->slot == slot &&
98 entry->pin == pin) {
99 irq = entry->irq;
100 break;
101 }
102 }
103
104 if (irq < 0)
105 pr_crit("pci %s: no irq found for pin %u\n",
106 pci_name((struct pci_dev *) dev), pin);
107 else
108 pr_info("pci %s: using irq %d for pin %u\n",
109 pci_name((struct pci_dev *) dev), irq, pin);
110
111 return irq;
112 }
113
pcibios_plat_dev_init(struct pci_dev * dev)114 int pcibios_plat_dev_init(struct pci_dev *dev)
115 {
116 if (ath79_pci_plat_dev_init)
117 return ath79_pci_plat_dev_init(dev);
118
119 return 0;
120 }
121
ath79_pci_set_irq_map(unsigned nr_irqs,const struct ath79_pci_irq * map)122 void __init ath79_pci_set_irq_map(unsigned nr_irqs,
123 const struct ath79_pci_irq *map)
124 {
125 ath79_pci_nr_irqs = nr_irqs;
126 ath79_pci_irq_map = map;
127 }
128
ath79_pci_set_plat_dev_init(int (* func)(struct pci_dev * dev))129 void __init ath79_pci_set_plat_dev_init(int (*func)(struct pci_dev *dev))
130 {
131 ath79_pci_plat_dev_init = func;
132 }
133
134 static struct platform_device *
ath79_register_pci_ar71xx(void)135 ath79_register_pci_ar71xx(void)
136 {
137 struct platform_device *pdev;
138 struct resource res[4];
139
140 memset(res, 0, sizeof(res));
141
142 res[0].name = "cfg_base";
143 res[0].flags = IORESOURCE_MEM;
144 res[0].start = AR71XX_PCI_CFG_BASE;
145 res[0].end = AR71XX_PCI_CFG_BASE + AR71XX_PCI_CFG_SIZE - 1;
146
147 res[1].flags = IORESOURCE_IRQ;
148 res[1].start = ATH79_CPU_IRQ(2);
149 res[1].end = ATH79_CPU_IRQ(2);
150
151 res[2].name = "io_base";
152 res[2].flags = IORESOURCE_IO;
153 res[2].start = 0;
154 res[2].end = 0;
155
156 res[3].name = "mem_base";
157 res[3].flags = IORESOURCE_MEM;
158 res[3].start = AR71XX_PCI_MEM_BASE;
159 res[3].end = AR71XX_PCI_MEM_BASE + AR71XX_PCI_MEM_SIZE - 1;
160
161 pdev = platform_device_register_simple("ar71xx-pci", -1,
162 res, ARRAY_SIZE(res));
163 return pdev;
164 }
165
166 static struct platform_device *
ath79_register_pci_ar724x(int id,unsigned long cfg_base,unsigned long ctrl_base,unsigned long crp_base,unsigned long mem_base,unsigned long mem_size,unsigned long io_base,int irq)167 ath79_register_pci_ar724x(int id,
168 unsigned long cfg_base,
169 unsigned long ctrl_base,
170 unsigned long crp_base,
171 unsigned long mem_base,
172 unsigned long mem_size,
173 unsigned long io_base,
174 int irq)
175 {
176 struct platform_device *pdev;
177 struct resource res[6];
178
179 memset(res, 0, sizeof(res));
180
181 res[0].name = "cfg_base";
182 res[0].flags = IORESOURCE_MEM;
183 res[0].start = cfg_base;
184 res[0].end = cfg_base + AR724X_PCI_CFG_SIZE - 1;
185
186 res[1].name = "ctrl_base";
187 res[1].flags = IORESOURCE_MEM;
188 res[1].start = ctrl_base;
189 res[1].end = ctrl_base + AR724X_PCI_CTRL_SIZE - 1;
190
191 res[2].flags = IORESOURCE_IRQ;
192 res[2].start = irq;
193 res[2].end = irq;
194
195 res[3].name = "mem_base";
196 res[3].flags = IORESOURCE_MEM;
197 res[3].start = mem_base;
198 res[3].end = mem_base + mem_size - 1;
199
200 res[4].name = "io_base";
201 res[4].flags = IORESOURCE_IO;
202 res[4].start = io_base;
203 res[4].end = io_base;
204
205 res[5].name = "crp_base";
206 res[5].flags = IORESOURCE_MEM;
207 res[5].start = crp_base;
208 res[5].end = crp_base + AR724X_PCI_CRP_SIZE - 1;
209
210 pdev = platform_device_register_simple("ar724x-pci", id,
211 res, ARRAY_SIZE(res));
212 return pdev;
213 }
214
ath79_register_pci(void)215 int __init ath79_register_pci(void)
216 {
217 struct platform_device *pdev = NULL;
218
219 if (soc_is_ar71xx()) {
220 pdev = ath79_register_pci_ar71xx();
221 } else if (soc_is_ar724x()) {
222 pdev = ath79_register_pci_ar724x(-1,
223 AR724X_PCI_CFG_BASE,
224 AR724X_PCI_CTRL_BASE,
225 AR724X_PCI_CRP_BASE,
226 AR724X_PCI_MEM_BASE,
227 AR724X_PCI_MEM_SIZE,
228 0,
229 ATH79_CPU_IRQ(2));
230 } else if (soc_is_ar9342() ||
231 soc_is_ar9344()) {
232 u32 bootstrap;
233
234 bootstrap = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
235 if ((bootstrap & AR934X_BOOTSTRAP_PCIE_RC) == 0)
236 return -ENODEV;
237
238 pdev = ath79_register_pci_ar724x(-1,
239 AR724X_PCI_CFG_BASE,
240 AR724X_PCI_CTRL_BASE,
241 AR724X_PCI_CRP_BASE,
242 AR724X_PCI_MEM_BASE,
243 AR724X_PCI_MEM_SIZE,
244 0,
245 ATH79_IP2_IRQ(0));
246 } else if (soc_is_qca9558()) {
247 pdev = ath79_register_pci_ar724x(0,
248 QCA955X_PCI_CFG_BASE0,
249 QCA955X_PCI_CTRL_BASE0,
250 QCA955X_PCI_CRP_BASE0,
251 QCA955X_PCI_MEM_BASE0,
252 QCA955X_PCI_MEM_SIZE,
253 0,
254 ATH79_IP2_IRQ(0));
255
256 pdev = ath79_register_pci_ar724x(1,
257 QCA955X_PCI_CFG_BASE1,
258 QCA955X_PCI_CTRL_BASE1,
259 QCA955X_PCI_CRP_BASE1,
260 QCA955X_PCI_MEM_BASE1,
261 QCA955X_PCI_MEM_SIZE,
262 1,
263 ATH79_IP3_IRQ(2));
264 } else {
265 /* No PCI support */
266 return -ENODEV;
267 }
268
269 if (!pdev)
270 pr_err("unable to register PCI controller device\n");
271
272 return pdev ? 0 : -ENODEV;
273 }
274