aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/82xx/ep8248e.c
blob: f9aee182e6f70c55a1d6c4d3e36990ccc412bf08 (plain) (blame)
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
/*
 * Embedded Planet EP8248E support
 *
 * Copyright 2007 Freescale Semiconductor, Inc.
 * Author: Scott Wood <scottwood@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/init.h>
#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <linux/mdio-bitbang.h>
#include <linux/of_mdio.h>
#include <linux/of_platform.h>

#include <asm/io.h>
#include <asm/cpm2.h>
#include <asm/udbg.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/mpc8260.h>
#include <asm/prom.h>

#include <sysdev/fsl_soc.h>
#include <sysdev/cpm2_pic.h>

#include "pq2.h"

static u8 __iomem *ep8248e_bcsr;
static struct device_node *ep8248e_bcsr_node;

#define BCSR7_SCC2_ENABLE 0x10

#define BCSR8_PHY1_ENABLE 0x80
#define BCSR8_PHY1_POWER  0x40
#define BCSR8_PHY2_ENABLE 0x20
#define BCSR8_PHY2_POWER  0x10
#define BCSR8_MDIO_READ   0x04
#define BCSR8_MDIO_CLOCK  0x02
#define BCSR8_MDIO_DATA   0x01

#define BCSR9_USB_ENABLE  0x80
#define BCSR9_USB_POWER   0x40
#define BCSR9_USB_HOST    0x20
#define BCSR9_USB_FULL_SPEED_TARGET 0x10

static void __init ep8248e_pic_init(void)
{
	struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
	if (!np) {
		printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
		return;
	}

	cpm2_pic_init(np);
	of_node_put(np);
}

static void ep8248e_set_mdc(struct mdiobb_ctrl *ctrl, int level)
{
	if (level)
		setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
	else
		clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);

	/* Read back to flush the write. */
	in_8(&ep8248e_bcsr[8]);
}

static void ep8248e_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
{
	if (output)
		clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
	else
		setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);

	/* Read back to flush the write. */
	in_8(&ep8248e_bcsr[8]);
}

static void ep8248e_set_mdio_data(struct mdiobb_ctrl *ctrl, int data)
{
	if (data)
		setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
	else
		clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);

	/* Read back to flush the write. */
	in_8(&ep8248e_bcsr[8]);
}

static int ep8248e_get_mdio_data(struct mdiobb_ctrl *ctrl)
{
	return in_8(&ep8248e_bcsr[8]) & BCSR8_MDIO_DATA;
}

static const struct mdiobb_ops ep8248e_mdio_ops = {
	.set_mdc = ep8248e_set_mdc,
	.set_mdio_dir = ep8248e_set_mdio_dir,
	.set_mdio_data = ep8248e_set_mdio_data,
	.get_mdio_data = ep8248e_get_mdio_data,
	.owner = THIS_MODULE,
};

static struct mdiobb_ctrl ep8248e_mdio_ctrl = {
	.ops = &ep8248e_mdio_ops,
};

static int __devinit ep8248e_mdio_probe(struct of_device *ofdev,
                                        const struct of_device_id *match)
{
	struct mii_bus *bus;
	struct resource res;
	struct device_node *node;
	int ret;

	node = of_get_parent(ofdev->node);
	of_node_put(node);
	if (node != ep8248e_bcsr_node)
		return -ENODEV;

	ret = of_address_to_resource(ofdev->node, 0, &res);
	if (ret)
		return ret;

	bus = alloc_mdio_bitbang(&ep8248e_mdio_ctrl);
	if (!bus)
		return -ENOMEM;

	bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (bus->irq == NULL) {
		ret = -ENOMEM;
		goto err_free_bus;
	}

	bus->name = "ep8248e-mdio-bitbang";
	bus->parent = &ofdev->dev;
	snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);

	ret = of_mdiobus_register(bus, ofdev->node);
	if (ret)
		goto err_free_irq;

	return 0;
err_free_irq:
	kfree(bus->irq);
err_free_bus:
	free_mdio_bitbang(bus);
	return ret;
}

static int ep8248e_mdio_remove(struct of_device *ofdev)
{
	BUG();
	return 0;
}

static const struct of_device_id ep8248e_mdio_match[] = {
	{
		.compatible = "fsl,ep8248e-mdio-bitbang",
	},
	{},
};

static struct of_platform_driver ep8248e_mdio_driver = {
	.driver = {
		.name = "ep8248e-mdio-bitbang",
	},
	.match_table = ep8248e_mdio_match,
	.probe = ep8248e_mdio_probe,
	.remove = ep8248e_mdio_remove,
};

struct cpm_pin {
	int port, pin, flags;
};

static __initdata struct cpm_pin ep8248e_pins[] = {
	/* SMC1 */
	{2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},

	/* SCC1 */
	{2, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},

	/* FCC1 */
	{0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
	{0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
	{0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
	{0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
	{2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},

	/* FCC2 */
	{1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},

	/* I2C */
	{4, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
	{4, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY},

	/* USB */
	{2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
	{3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
	{3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
};

static void __init init_ioports(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ep8248e_pins); i++) {
		const struct cpm_pin *pin = &ep8248e_pins[i];
		cpm2_set_pin(pin->port, pin->pin, pin->flags);
	}

	cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
	cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
	cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
	cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX); /* USB */
	cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
	cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
	cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
	cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
}

static void __init ep8248e_setup_arch(void)
{
	if (ppc_md.progress)
		ppc_md.progress("ep8248e_setup_arch()", 0);

	cpm2_reset();

	/* When this is set, snooping CPM DMA from RAM causes
	 * machine checks.  See erratum SIU18.
	 */
	clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);

	ep8248e_bcsr_node =
		of_find_compatible_node(NULL, NULL, "fsl,ep8248e-bcsr");
	if (!ep8248e_bcsr_node) {
		printk(KERN_ERR "No bcsr in device tree\n");
		return;
	}

	ep8248e_bcsr = of_iomap(ep8248e_bcsr_node, 0);
	if (!ep8248e_bcsr) {
		printk(KERN_ERR "Cannot map BCSR registers\n");
		of_node_put(ep8248e_bcsr_node);
		ep8248e_bcsr_node = NULL;
		return;
	}

	setbits8(&ep8248e_bcsr[7], BCSR7_SCC2_ENABLE);
	setbits8(&ep8248e_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
	                           BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);

	init_ioports();

	if (ppc_md.progress)
		ppc_md.progress("ep8248e_setup_arch(), finish", 0);
}

static  __initdata struct of_device_id of_bus_ids[] = {
	{ .compatible = "simple-bus", },
	{ .compatible = "fsl,ep8248e-bcsr", },
	{},
};

static int __init declare_of_platform_devices(void)
{
	of_platform_bus_probe(NULL, of_bus_ids, NULL);
	of_register_platform_driver(&ep8248e_mdio_driver);

	return 0;
}
machine_device_initcall(ep8248e, declare_of_platform_devices);

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init ep8248e_probe(void)
{
	unsigned long root = of_get_flat_dt_root();
	return of_flat_dt_is_compatible(root, "fsl,ep8248e");
}

define_machine(ep8248e)
{
	.name = "Embedded Planet EP8248E",
	.probe = ep8248e_probe,
	.setup_arch = ep8248e_setup_arch,
	.init_IRQ = ep8248e_pic_init,
	.get_irq = cpm2_get_irq,
	.calibrate_decr = generic_calibrate_decr,
	.restart = pq2_restart,
	.progress = udbg_progress,
};