summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-pxa/em-x270.c
blob: 9c57700ee5c29a0e8eb26a8bddd630f3432c218c (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
/*
 * Support for CompuLab EM-x270 platform
 *
 * Copyright (C) 2007 CompuLab, Ltd.
 * Author: Mike Rapoport <mike@compulab.co.il>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/irq.h>
#include <linux/platform_device.h>

#include <linux/dm9000.h>
#include <linux/rtc-v3020.h>

#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>

#include <asm/mach-types.h>

#include <asm/mach/arch.h>

#include <asm/arch/pxa-regs.h>
#include <asm/arch/pxa2xx-gpio.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/ohci.h>
#include <asm/arch/mmc.h>
#include <asm/arch/bitfield.h>

#include "generic.h"

/* GPIO IRQ usage */
#define EM_X270_MMC_PD		(105)
#define EM_X270_ETHIRQ		IRQ_GPIO(41)
#define EM_X270_MMC_IRQ		IRQ_GPIO(13)

static struct resource em_x270_dm9k_resource[] = {
	[0] = {
		.start = PXA_CS2_PHYS,
		.end   = PXA_CS2_PHYS + 3,
		.flags = IORESOURCE_MEM,
	},
	[1] = {
		.start = PXA_CS2_PHYS + 8,
		.end   = PXA_CS2_PHYS + 8 + 0x3f,
		.flags = IORESOURCE_MEM,
	},
	[2] = {
		.start = EM_X270_ETHIRQ,
		.end   = EM_X270_ETHIRQ,
		.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
	}
};

/* for the moment we limit ourselves to 32bit IO until some
 * better IO routines can be written and tested
 */
static struct dm9000_plat_data em_x270_dm9k_platdata = {
	.flags		= DM9000_PLATF_32BITONLY,
};

/* Ethernet device */
static struct platform_device em_x270_dm9k = {
	.name		= "dm9000",
	.id		= 0,
	.num_resources	= ARRAY_SIZE(em_x270_dm9k_resource),
	.resource	= em_x270_dm9k_resource,
	.dev		= {
		.platform_data = &em_x270_dm9k_platdata,
	}
};

/* audio device */
static struct platform_device em_x270_audio = {
	.name		= "pxa2xx-ac97",
	.id		= -1,
};

/* WM9712 touchscreen controller. Hopefully the driver will make it to
 * the mainstream sometime */
static struct platform_device em_x270_ts = {
	.name		= "wm97xx-ts",
	.id		= -1,
};

/* RTC */
static struct resource em_x270_v3020_resource[] = {
	[0] = {
		.start = PXA_CS4_PHYS,
		.end   = PXA_CS4_PHYS + 3,
		.flags = IORESOURCE_MEM,
	},
};

static struct v3020_platform_data em_x270_v3020_platdata = {
	.leftshift = 0,
};

static struct platform_device em_x270_rtc = {
	.name		= "v3020",
	.num_resources	= ARRAY_SIZE(em_x270_v3020_resource),
	.resource	= em_x270_v3020_resource,
	.id		= -1,
	.dev		= {
		.platform_data = &em_x270_v3020_platdata,
	}
};

/* NAND flash */
#define GPIO_NAND_CS	(11)
#define GPIO_NAND_RB	(56)

static inline void nand_cs_on(void)
{
	GPCR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
}

static void nand_cs_off(void)
{
	dsb();

	GPSR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
}

/* hardware specific access to control-lines */
static void em_x270_nand_cmd_ctl(struct mtd_info *mtd, int dat,
				 unsigned int ctrl)
{
	struct nand_chip *this = mtd->priv;
	unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;

	dsb();

	if (ctrl & NAND_CTRL_CHANGE) {
		if (ctrl & NAND_ALE)
			nandaddr |=  (1 << 3);
		else
			nandaddr &= ~(1 << 3);
		if (ctrl & NAND_CLE)
			nandaddr |=  (1 << 2);
		else
			nandaddr &= ~(1 << 2);
		if (ctrl & NAND_NCE)
			nand_cs_on();
		else
			nand_cs_off();
	}

	dsb();
	this->IO_ADDR_W = (void __iomem *)nandaddr;
	if (dat != NAND_CMD_NONE)
		writel(dat, this->IO_ADDR_W);

	dsb();
}

/* read device ready pin */
static int em_x270_nand_device_ready(struct mtd_info *mtd)
{
	dsb();

	return GPLR(GPIO_NAND_RB) & GPIO_bit(GPIO_NAND_RB);
}

static struct mtd_partition em_x270_partition_info[] = {
	[0] = {
		.name	= "em_x270-0",
		.offset	= 0,
		.size	= SZ_4M,
	},
	[1] = {
		.name	= "em_x270-1",
		.offset	= MTDPART_OFS_APPEND,
		.size	= MTDPART_SIZ_FULL
	},
};

static const char *em_x270_part_probes[] = { "cmdlinepart", NULL };

struct platform_nand_data em_x270_nand_platdata = {
	.chip = {
		.nr_chips = 1,
		.chip_offset = 0,
		.nr_partitions = ARRAY_SIZE(em_x270_partition_info),
		.partitions = em_x270_partition_info,
		.chip_delay = 20,
		.part_probe_types = em_x270_part_probes,
	},
	.ctrl = {
		.hwcontrol = 0,
		.dev_ready = em_x270_nand_device_ready,
		.select_chip = 0,
		.cmd_ctrl = em_x270_nand_cmd_ctl,
	},
};

static struct resource em_x270_nand_resource[] = {
	[0] = {
		.start = PXA_CS1_PHYS,
		.end   = PXA_CS1_PHYS + 12,
		.flags = IORESOURCE_MEM,
	},
};

static struct platform_device em_x270_nand = {
	.name		= "gen_nand",
	.num_resources	= ARRAY_SIZE(em_x270_nand_resource),
	.resource	= em_x270_nand_resource,
	.id		= -1,
	.dev		= {
		.platform_data = &em_x270_nand_platdata,
	}
};

/* platform devices */
static struct platform_device *platform_devices[] __initdata = {
	&em_x270_dm9k,
	&em_x270_audio,
	&em_x270_ts,
	&em_x270_rtc,
	&em_x270_nand,
};


/* PXA27x OHCI controller setup */
static int em_x270_ohci_init(struct device *dev)
{
	/* Set the Power Control Polarity Low */
	UHCHR = (UHCHR | UHCHR_PCPL) &
		~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSE);

	/* enable port 2 transiever */
	UP2OCR = UP2OCR_HXS | UP2OCR_HXOE;

	return 0;
}

static struct pxaohci_platform_data em_x270_ohci_platform_data = {
	.port_mode	= PMM_PERPORT_MODE,
	.init		= em_x270_ohci_init,
};


static int em_x270_mci_init(struct device *dev,
			    irq_handler_t em_x270_detect_int,
			    void *data)
{
	int err;

	/* setup GPIO for PXA27x MMC controller */
	pxa_gpio_mode(GPIO32_MMCCLK_MD);
	pxa_gpio_mode(GPIO112_MMCCMD_MD);
	pxa_gpio_mode(GPIO92_MMCDAT0_MD);
	pxa_gpio_mode(GPIO109_MMCDAT1_MD);
	pxa_gpio_mode(GPIO110_MMCDAT2_MD);
	pxa_gpio_mode(GPIO111_MMCDAT3_MD);

	/* EM-X270 uses GPIO13 as SD power enable */
	pxa_gpio_mode(EM_X270_MMC_PD | GPIO_OUT);

	err = request_irq(EM_X270_MMC_IRQ, em_x270_detect_int,
			  IRQF_DISABLED | IRQF_TRIGGER_FALLING,
			  "MMC card detect", data);
	if (err) {
		printk(KERN_ERR "%s: can't request MMC card detect IRQ: %d\n",
		       __func__, err);
		return err;
	}

	return 0;
}

static void em_x270_mci_setpower(struct device *dev, unsigned int vdd)
{
	/*
	   FIXME: current hardware implementation does not allow to
	   enable/disable MMC power. This will be fixed in next HW releases,
	   and we'll need to add implmentation here.
	*/
	return;
}

static void em_x270_mci_exit(struct device *dev, void *data)
{
	free_irq(EM_X270_MMC_IRQ, data);
}

static struct pxamci_platform_data em_x270_mci_platform_data = {
	.ocr_mask	= MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31,
	.init 		= em_x270_mci_init,
	.setpower 	= em_x270_mci_setpower,
	.exit		= em_x270_mci_exit,
};

/* LCD 480x640 */
static struct pxafb_mode_info em_x270_lcd_mode = {
	.pixclock	= 50000,
	.bpp		= 16,
	.xres		= 480,
	.yres		= 640,
	.hsync_len	= 8,
	.vsync_len	= 2,
	.left_margin	= 8,
	.upper_margin	= 0,
	.right_margin	= 24,
	.lower_margin	= 4,
	.cmap_greyscale	= 0,
};

static struct pxafb_mach_info em_x270_lcd = {
	.modes		= &em_x270_lcd_mode,
	.num_modes	= 1,
	.cmap_inverse	= 0,
	.cmap_static	= 0,
	.lccr0		= LCCR0_PAS,
	.lccr3		= LCCR3_PixClkDiv(0x01) | LCCR3_Acb(0xff),
};

static void __init em_x270_init(void)
{
	/* setup LCD */
	set_pxa_fb_info(&em_x270_lcd);

	/* register EM-X270 platform devices */
	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));

	/* set MCI and OHCI platform parameters */
	pxa_set_mci_info(&em_x270_mci_platform_data);
	pxa_set_ohci_info(&em_x270_ohci_platform_data);

	/* setup STUART GPIOs */
	pxa_gpio_mode(GPIO46_STRXD_MD);
	pxa_gpio_mode(GPIO47_STTXD_MD);

	/* setup BTUART GPIOs */
	pxa_gpio_mode(GPIO42_BTRXD_MD);
	pxa_gpio_mode(GPIO43_BTTXD_MD);
	pxa_gpio_mode(GPIO44_BTCTS_MD);
	pxa_gpio_mode(GPIO45_BTRTS_MD);

	/* Setup interrupt for dm9000 */
	set_irq_type(EM_X270_ETHIRQ, IRQT_RISING);
}

MACHINE_START(EM_X270, "Compulab EM-x270")
	.boot_params	= 0xa0000100,
	.phys_io	= 0x40000000,
	.io_pg_offst	= (io_p2v(0x40000000) >> 18) & 0xfffc,
	.map_io		= pxa_map_io,
	.init_irq	= pxa27x_init_irq,
	.timer		= &pxa_timer,
	.init_machine	= em_x270_init,
MACHINE_END
OpenPOWER on IntegriCloud