Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[PATCH] powerpc: Add FSL SOC library and setup code
Parse the flat device tree for devices on Freescale SOC's that we know
about (gianfar, gianfar_mdio, i2c, mpc83xx_wdt). We need to setup
platform devices and platform data for these devices to match arch/ppc
usage.
Also add a helper function (get_immrbase) that reports the base
address of the MMIO registers on the SOC.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
authored by
Kumar Gala
and committed by
Paul Mackerras
eed32001
b8e383d5
+1
arch/powerpc/sysdev/Makefile
+1
arch/powerpc/sysdev/Makefile
+317
arch/powerpc/sysdev/fsl_soc.c
+317
arch/powerpc/sysdev/fsl_soc.c
···
···
1
+
/*
2
+
* FSL SoC setup code
3
+
*
4
+
* Maintained by Kumar Gala (see MAINTAINERS for contact information)
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify it
7
+
* under the terms of the GNU General Public License as published by the
8
+
* Free Software Foundation; either version 2 of the License, or (at your
9
+
* option) any later version.
10
+
*/
11
+
12
+
#include <linux/config.h>
13
+
#include <linux/stddef.h>
14
+
#include <linux/kernel.h>
15
+
#include <linux/init.h>
16
+
#include <linux/errno.h>
17
+
#include <linux/major.h>
18
+
#include <linux/delay.h>
19
+
#include <linux/irq.h>
20
+
#include <linux/module.h>
21
+
#include <linux/device.h>
22
+
#include <linux/platform_device.h>
23
+
#include <linux/fsl_devices.h>
24
+
25
+
#include <asm/system.h>
26
+
#include <asm/atomic.h>
27
+
#include <asm/io.h>
28
+
#include <asm/irq.h>
29
+
#include <asm/prom.h>
30
+
#include <sysdev/fsl_soc.h>
31
+
#include <mm/mmu_decl.h>
32
+
33
+
static phys_addr_t immrbase = -1;
34
+
35
+
phys_addr_t get_immrbase(void)
36
+
{
37
+
struct device_node *soc;
38
+
39
+
if (immrbase != -1)
40
+
return immrbase;
41
+
42
+
soc = of_find_node_by_type(NULL, "soc");
43
+
if (soc != 0) {
44
+
unsigned int size;
45
+
void *prop = get_property(soc, "reg", &size);
46
+
immrbase = of_translate_address(soc, prop);
47
+
of_node_put(soc);
48
+
};
49
+
50
+
return immrbase;
51
+
}
52
+
EXPORT_SYMBOL(get_immrbase);
53
+
54
+
static const char * gfar_tx_intr = "tx";
55
+
static const char * gfar_rx_intr = "rx";
56
+
static const char * gfar_err_intr = "error";
57
+
58
+
static int __init gfar_of_init(void)
59
+
{
60
+
struct device_node *np;
61
+
unsigned int i;
62
+
struct platform_device *mdio_dev, *gfar_dev;
63
+
struct resource res;
64
+
int ret;
65
+
66
+
for (np = NULL, i = 0; (np = of_find_compatible_node(np, "mdio", "gianfar")) != NULL; i++) {
67
+
int k;
68
+
struct device_node *child = NULL;
69
+
struct gianfar_mdio_data mdio_data;
70
+
71
+
memset(&res, 0, sizeof(res));
72
+
memset(&mdio_data, 0, sizeof(mdio_data));
73
+
74
+
ret = of_address_to_resource(np, 0, &res);
75
+
if (ret)
76
+
goto mdio_err;
77
+
78
+
mdio_dev = platform_device_register_simple("fsl-gianfar_mdio", res.start, &res, 1);
79
+
if (IS_ERR(mdio_dev)) {
80
+
ret = PTR_ERR(mdio_dev);
81
+
goto mdio_err;
82
+
}
83
+
84
+
for (k = 0; k < 32; k++)
85
+
mdio_data.irq[k] = -1;
86
+
87
+
while ((child = of_get_next_child(np, child)) != NULL) {
88
+
if (child->n_intrs) {
89
+
u32 *id = (u32 *) get_property(child, "reg", NULL);
90
+
mdio_data.irq[*id] = child->intrs[0].line;
91
+
}
92
+
}
93
+
94
+
ret = platform_device_add_data(mdio_dev, &mdio_data, sizeof(struct gianfar_mdio_data));
95
+
if (ret)
96
+
goto mdio_unreg;
97
+
}
98
+
99
+
for (np = NULL, i = 0; (np = of_find_compatible_node(np, "network", "gianfar")) != NULL; i++) {
100
+
struct resource r[4];
101
+
struct device_node *phy, *mdio;
102
+
struct gianfar_platform_data gfar_data;
103
+
unsigned int *id;
104
+
char *model;
105
+
void *mac_addr;
106
+
phandle *ph;
107
+
108
+
memset(r, 0, sizeof(r));
109
+
memset(&gfar_data, 0, sizeof(gfar_data));
110
+
111
+
ret = of_address_to_resource(np, 0, &r[0]);
112
+
if (ret)
113
+
goto gfar_err;
114
+
115
+
r[1].start = np->intrs[0].line;
116
+
r[1].end = np->intrs[0].line;
117
+
r[1].flags = IORESOURCE_IRQ;
118
+
119
+
model = get_property(np, "model", NULL);
120
+
121
+
/* If we aren't the FEC we have multiple interrupts */
122
+
if (model && strcasecmp(model, "FEC")) {
123
+
r[1].name = gfar_tx_intr;
124
+
125
+
r[2].name = gfar_rx_intr;
126
+
r[2].start = np->intrs[1].line;
127
+
r[2].end = np->intrs[1].line;
128
+
r[2].flags = IORESOURCE_IRQ;
129
+
130
+
r[3].name = gfar_err_intr;
131
+
r[3].start = np->intrs[2].line;
132
+
r[3].end = np->intrs[2].line;
133
+
r[3].flags = IORESOURCE_IRQ;
134
+
}
135
+
136
+
gfar_dev = platform_device_register_simple("fsl-gianfar", i, &r[0], np->n_intrs + 1);
137
+
138
+
if (IS_ERR(gfar_dev)) {
139
+
ret = PTR_ERR(gfar_dev);
140
+
goto gfar_err;
141
+
}
142
+
143
+
mac_addr = get_property(np, "address", NULL);
144
+
memcpy(gfar_data.mac_addr, mac_addr, 6);
145
+
146
+
if (model && !strcasecmp(model, "TSEC"))
147
+
gfar_data.device_flags =
148
+
FSL_GIANFAR_DEV_HAS_GIGABIT |
149
+
FSL_GIANFAR_DEV_HAS_COALESCE |
150
+
FSL_GIANFAR_DEV_HAS_RMON |
151
+
FSL_GIANFAR_DEV_HAS_MULTI_INTR;
152
+
if (model && !strcasecmp(model, "eTSEC"))
153
+
gfar_data.device_flags =
154
+
FSL_GIANFAR_DEV_HAS_GIGABIT |
155
+
FSL_GIANFAR_DEV_HAS_COALESCE |
156
+
FSL_GIANFAR_DEV_HAS_RMON |
157
+
FSL_GIANFAR_DEV_HAS_MULTI_INTR |
158
+
FSL_GIANFAR_DEV_HAS_CSUM |
159
+
FSL_GIANFAR_DEV_HAS_VLAN |
160
+
FSL_GIANFAR_DEV_HAS_EXTENDED_HASH;
161
+
162
+
ph = (phandle *) get_property(np, "phy-handle", NULL);
163
+
phy = of_find_node_by_phandle(*ph);
164
+
165
+
if (phy == NULL) {
166
+
ret = -ENODEV;
167
+
goto gfar_unreg;
168
+
}
169
+
170
+
mdio = of_get_parent(phy);
171
+
172
+
id = (u32 *) get_property(phy, "reg", NULL);
173
+
ret = of_address_to_resource(mdio, 0, &res);
174
+
if (ret) {
175
+
of_node_put(phy);
176
+
of_node_put(mdio);
177
+
goto gfar_unreg;
178
+
}
179
+
180
+
gfar_data.phy_id = *id;
181
+
gfar_data.bus_id = res.start;
182
+
183
+
of_node_put(phy);
184
+
of_node_put(mdio);
185
+
186
+
ret = platform_device_add_data(gfar_dev, &gfar_data, sizeof(struct gianfar_platform_data));
187
+
if (ret)
188
+
goto gfar_unreg;
189
+
}
190
+
191
+
return 0;
192
+
193
+
mdio_unreg:
194
+
platform_device_unregister(mdio_dev);
195
+
mdio_err:
196
+
return ret;
197
+
198
+
gfar_unreg:
199
+
platform_device_unregister(gfar_dev);
200
+
gfar_err:
201
+
return ret;
202
+
}
203
+
arch_initcall(gfar_of_init);
204
+
205
+
static int __init fsl_i2c_of_init(void)
206
+
{
207
+
struct device_node *np;
208
+
unsigned int i;
209
+
struct platform_device *i2c_dev;
210
+
int ret;
211
+
212
+
for (np = NULL, i = 0; (np = of_find_compatible_node(np, "i2c", "fsl-i2c")) != NULL; i++) {
213
+
struct resource r[2];
214
+
struct fsl_i2c_platform_data i2c_data;
215
+
unsigned char * flags = NULL;
216
+
217
+
memset(&r, 0, sizeof(r));
218
+
memset(&i2c_data, 0, sizeof(i2c_data));
219
+
220
+
ret = of_address_to_resource(np, 0, &r[0]);
221
+
if (ret)
222
+
goto i2c_err;
223
+
224
+
r[1].start = np->intrs[0].line;
225
+
r[1].end = np->intrs[0].line;
226
+
r[1].flags = IORESOURCE_IRQ;
227
+
228
+
i2c_dev = platform_device_register_simple("fsl-i2c", i, r, 2);
229
+
if (IS_ERR(i2c_dev)) {
230
+
ret = PTR_ERR(i2c_dev);
231
+
goto i2c_err;
232
+
}
233
+
234
+
i2c_data.device_flags = 0;
235
+
flags = get_property(np, "dfsrr", NULL);
236
+
if (flags)
237
+
i2c_data.device_flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
238
+
239
+
flags = get_property(np, "fsl5200-clocking", NULL);
240
+
if (flags)
241
+
i2c_data.device_flags |= FSL_I2C_DEV_CLOCK_5200;
242
+
243
+
ret = platform_device_add_data(i2c_dev, &i2c_data, sizeof(struct fsl_i2c_platform_data));
244
+
if (ret)
245
+
goto i2c_unreg;
246
+
}
247
+
248
+
return 0;
249
+
250
+
i2c_unreg:
251
+
platform_device_unregister(i2c_dev);
252
+
i2c_err:
253
+
return ret;
254
+
}
255
+
arch_initcall(fsl_i2c_of_init);
256
+
257
+
#ifdef CONFIG_PPC_83xx
258
+
static int __init mpc83xx_wdt_init(void)
259
+
{
260
+
struct resource r;
261
+
struct device_node *soc, *np;
262
+
struct platform_device *dev;
263
+
unsigned int *freq;
264
+
int ret;
265
+
266
+
np = of_find_compatible_node(NULL, "watchdog", "mpc83xx_wdt");
267
+
268
+
if (!np) {
269
+
ret = -ENODEV;
270
+
goto mpc83xx_wdt_nodev;
271
+
}
272
+
273
+
soc = of_find_node_by_type(NULL, "soc");
274
+
275
+
if (!soc) {
276
+
ret = -ENODEV;
277
+
goto mpc83xx_wdt_nosoc;
278
+
}
279
+
280
+
freq = (unsigned int *)get_property(soc, "bus-frequency", NULL);
281
+
if (!freq) {
282
+
ret = -ENODEV;
283
+
goto mpc83xx_wdt_err;
284
+
}
285
+
286
+
memset(&r, 0, sizeof(r));
287
+
288
+
ret = of_address_to_resource(np, 0, &r);
289
+
if (ret)
290
+
goto mpc83xx_wdt_err;
291
+
292
+
dev = platform_device_register_simple("mpc83xx_wdt", 0, &r, 1);
293
+
if (IS_ERR(dev)) {
294
+
ret = PTR_ERR(dev);
295
+
goto mpc83xx_wdt_err;
296
+
}
297
+
298
+
ret = platform_device_add_data(dev, freq, sizeof(int));
299
+
if (ret)
300
+
goto mpc83xx_wdt_unreg;
301
+
302
+
of_node_put(soc);
303
+
of_node_put(np);
304
+
305
+
return 0;
306
+
307
+
mpc83xx_wdt_unreg:
308
+
platform_device_unregister(dev);
309
+
mpc83xx_wdt_err:
310
+
of_node_put(soc);
311
+
mpc83xx_wdt_nosoc:
312
+
of_node_put(np);
313
+
mpc83xx_wdt_nodev:
314
+
return ret;
315
+
}
316
+
arch_initcall(mpc83xx_wdt_init);
317
+
#endif