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
|
From cc5a306038b7956b5736a70696dddaaf3792df76 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Tue, 6 Mar 2018 09:22:49 +0100
Subject: [PATCH 20/27] MIPS: ath79: turn pci-ar71xx driver into a pure OF
driver
Signed-off-by: John Crispin <john@phrozen.org>
---
arch/mips/pci/pci-ar71xx.c | 81 +++++++++++++++++++++++-----------------------
1 file changed, 40 insertions(+), 41 deletions(-)
--- a/arch/mips/pci/pci-ar71xx.c
+++ b/arch/mips/pci/pci-ar71xx.c
@@ -18,8 +18,11 @@
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
#include <linux/init.h>
#include <linux/platform_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
#include <asm/mach-ath79/ar71xx_regs.h>
#include <asm/mach-ath79/ath79.h>
@@ -49,12 +52,13 @@
#define AR71XX_PCI_IRQ_COUNT 5
struct ar71xx_pci_controller {
+ struct device_node *np;
void __iomem *cfg_base;
int irq;
- int irq_base;
struct pci_controller pci_ctrl;
struct resource io_res;
struct resource mem_res;
+ struct irq_domain *domain;
};
/* Byte lane enable bits */
@@ -228,29 +232,30 @@ static struct pci_ops ar71xx_pci_ops = {
static void ar71xx_pci_irq_handler(struct irq_desc *desc)
{
- struct ar71xx_pci_controller *apc;
void __iomem *base = ath79_reset_base;
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct ar71xx_pci_controller *apc = irq_desc_get_handler_data(desc);
u32 pending;
- apc = irq_desc_get_handler_data(desc);
-
+ chained_irq_enter(chip, desc);
pending = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_STATUS) &
__raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
if (pending & AR71XX_PCI_INT_DEV0)
- generic_handle_irq(apc->irq_base + 0);
+ generic_handle_irq(irq_linear_revmap(apc->domain, 1));
else if (pending & AR71XX_PCI_INT_DEV1)
- generic_handle_irq(apc->irq_base + 1);
+ generic_handle_irq(irq_linear_revmap(apc->domain, 2));
else if (pending & AR71XX_PCI_INT_DEV2)
- generic_handle_irq(apc->irq_base + 2);
+ generic_handle_irq(irq_linear_revmap(apc->domain, 3));
else if (pending & AR71XX_PCI_INT_CORE)
- generic_handle_irq(apc->irq_base + 4);
+ generic_handle_irq(irq_linear_revmap(apc->domain, 4));
else
spurious_interrupt();
+ chained_irq_exit(chip, desc);
}
static void ar71xx_pci_irq_unmask(struct irq_data *d)
@@ -261,7 +266,7 @@ static void ar71xx_pci_irq_unmask(struct
u32 t;
apc = irq_data_get_irq_chip_data(d);
- irq = d->irq - apc->irq_base;
+ irq = irq_linear_revmap(apc->domain, d->irq);
t = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
__raw_writel(t | (1 << irq), base + AR71XX_RESET_REG_PCI_INT_ENABLE);
@@ -278,7 +283,7 @@ static void ar71xx_pci_irq_mask(struct i
u32 t;
apc = irq_data_get_irq_chip_data(d);
- irq = d->irq - apc->irq_base;
+ irq = irq_linear_revmap(apc->domain, d->irq);
t = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE);
__raw_writel(t & ~(1 << irq), base + AR71XX_RESET_REG_PCI_INT_ENABLE);
@@ -294,24 +299,30 @@ static struct irq_chip ar71xx_pci_irq_ch
.irq_mask_ack = ar71xx_pci_irq_mask,
};
+static int ar71xx_pci_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+{
+ struct ar71xx_pci_controller *apc = d->host_data;
+
+ irq_set_chip_and_handler(irq, &ar71xx_pci_irq_chip, handle_level_irq);
+ irq_set_chip_data(irq, apc);
+
+ return 0;
+}
+
+static const struct irq_domain_ops ar71xx_pci_domain_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = ar71xx_pci_irq_map,
+};
+
static void ar71xx_pci_irq_init(struct ar71xx_pci_controller *apc)
{
void __iomem *base = ath79_reset_base;
- int i;
__raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_ENABLE);
__raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_STATUS);
- BUILD_BUG_ON(ATH79_PCI_IRQ_COUNT < AR71XX_PCI_IRQ_COUNT);
-
- apc->irq_base = ATH79_PCI_IRQ_BASE;
- for (i = apc->irq_base;
- i < apc->irq_base + AR71XX_PCI_IRQ_COUNT; i++) {
- irq_set_chip_and_handler(i, &ar71xx_pci_irq_chip,
- handle_level_irq);
- irq_set_chip_data(i, apc);
- }
-
+ apc->domain = irq_domain_add_linear(apc->np, AR71XX_PCI_IRQ_COUNT,
+ &ar71xx_pci_domain_ops, apc);
irq_set_chained_handler_and_data(apc->irq, ar71xx_pci_irq_handler,
apc);
}
@@ -328,6 +339,11 @@ static void ar71xx_pci_reset(void)
mdelay(100);
}
+static const struct of_device_id ar71xx_pci_ids[] = {
+ { .compatible = "qca,ar7100-pci" },
+ {},
+};
+
static int ar71xx_pci_probe(struct platform_device *pdev)
{
struct ar71xx_pci_controller *apc;
@@ -348,26 +364,6 @@ static int ar71xx_pci_probe(struct platf
if (apc->irq < 0)
return -EINVAL;
- res = platform_get_resource_byname(pdev, IORESOURCE_IO, "io_base");
- if (!res)
- return -EINVAL;
-
- apc->io_res.parent = res;
- apc->io_res.name = "PCI IO space";
- apc->io_res.start = res->start;
- apc->io_res.end = res->end;
- apc->io_res.flags = IORESOURCE_IO;
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem_base");
- if (!res)
- return -EINVAL;
-
- apc->mem_res.parent = res;
- apc->mem_res.name = "PCI memory space";
- apc->mem_res.start = res->start;
- apc->mem_res.end = res->end;
- apc->mem_res.flags = IORESOURCE_MEM;
-
ar71xx_pci_reset();
/* setup COMMAND register */
@@ -378,11 +374,13 @@ static int ar71xx_pci_probe(struct platf
/* clear bus errors */
ar71xx_pci_check_error(apc, 1);
- ar71xx_pci_irq_init(apc);
-
+ apc->np = pdev->dev.of_node;
apc->pci_ctrl.pci_ops = &ar71xx_pci_ops;
apc->pci_ctrl.mem_resource = &apc->mem_res;
apc->pci_ctrl.io_resource = &apc->io_res;
+ pci_load_of_ranges(&apc->pci_ctrl, pdev->dev.of_node);
+
+ ar71xx_pci_irq_init(apc);
register_pci_controller(&apc->pci_ctrl);
@@ -393,6 +391,7 @@ static struct platform_driver ar71xx_pci
.probe = ar71xx_pci_probe,
.driver = {
.name = "ar71xx-pci",
+ .of_match_table = of_match_ptr(ar71xx_pci_ids),
},
};
|
