summaryrefslogtreecommitdiffstats
path: root/arch/arm/boards/chumby_falconwing/falconwing.c
blob: 5e569bcc9addc66e5c96226fbc95742986ffd5bb (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
/*
 * (C) Copyright 2010 Juergen Beisert - Pengutronix
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */
#include <common.h>
#include <init.h>
#include <gpio.h>
#include <environment.h>
#include <envfs.h>
#include <errno.h>
#include <mci.h>
#include <linux/sizes.h>
#include <usb/ehci.h>
#include <asm/armlinux.h>
#include <io.h>
#include <asm/mmu.h>
#include <generated/mach-types.h>
#include <mach/imx-regs.h>
#include <mach/clock.h>
#include <mach/mci.h>
#include <mach/fb.h>
#include <mach/usb.h>
#include <mach/iomux.h>

static struct mxs_mci_platform_data mci_pdata = {
	.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED,
	.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,	/* fixed to 3.3 V */
};

#define GPIO_LCD_RESET		50
#define GPIO_LCD_BACKLIGHT	60

static void chumby_fb_enable(int enable)
{
	gpio_direction_output(GPIO_LCD_RESET, enable);

	/* Give the display a chance to sync before we enable
	 * the backlight to avoid flickering
	 */
	if (enable)
		mdelay(100);

	gpio_direction_output(GPIO_LCD_BACKLIGHT, enable);
}

static struct fb_videomode falconwing_vmode = {
	/*
	 * Nanovision NMA35QV65-B2-K01 (directly connected)
	 * Clock: 6.25 MHz
	 * Syncs: high active, DE low active
	 * Display area: 70.08 mm x 52.56 mm
	 */
	.name = "NMA35",
	.refresh = 60,
	.xres = 320,
	.yres = 240,
	.pixclock = KHZ2PICOS(6250),    /* max. 10 MHz */
	/* line lenght should be 64 µs */
	.left_margin = 28,
	.hsync_len = 24,
	.right_margin = 28,
	/* frame rate should be 60 Hz */
	.upper_margin = 8,
	.vsync_len = 4,
	.lower_margin = 8,
	.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
	.vmode = FB_VMODE_NONINTERLACED,
};

#define MAX_FB_SIZE SZ_1M

static struct imx_fb_platformdata fb_mode = {
	.mode_list = &falconwing_vmode,
	.mode_cnt = 1,
	/* the NMA35 is a 24 bit display, but only 18 bits are connected */
	.ld_intf_width = STMLCDIF_18BIT,
	.enable = chumby_fb_enable,
	.fixed_screen = (void *)(0x40000000 + SZ_64M - MAX_FB_SIZE),
	.fixed_screen_size = MAX_FB_SIZE,
};

static const uint32_t pad_setup[] = {
	/* may be not required as already done by the bootlet code */
#if 0
	/* SDRAM data signals */
	EMI_D15 | STRENGTH(0) | VE_2_5V,
	EMI_D14 | STRENGTH(0) | VE_2_5V,
	EMI_D13 | STRENGTH(0) | VE_2_5V,
	EMI_D12 | STRENGTH(0) | VE_2_5V,
	EMI_D11 | STRENGTH(0) | VE_2_5V,
	EMI_D10 | STRENGTH(0) | VE_2_5V,
	EMI_D9 | STRENGTH(0) | VE_2_5V,
	EMI_D8 | STRENGTH(0) | VE_2_5V,
	EMI_D7 | STRENGTH(0) | VE_2_5V,
	EMI_D6 | STRENGTH(0) | VE_2_5V,
	EMI_D5 | STRENGTH(0) | VE_2_5V,
	EMI_D4 | STRENGTH(0) | VE_2_5V,
	EMI_D3 | STRENGTH(0) | VE_2_5V,
	EMI_D2 | STRENGTH(0) | VE_2_5V,
	EMI_D1 | STRENGTH(0) | VE_2_5V,
	EMI_D0 | STRENGTH(0) | VE_2_5V,

	/* SDRAM data control signals */
	EMI_DQM0 | STRENGTH(0) | VE_2_5V,	/* LDM */
	EMI_DQM1 | STRENGTH(0) | VE_2_5V,	/* UDM */

	/* SDRAM address signals */
	EMI_A0 | STRENGTH(0) | VE_2_5V,
	EMI_A1 | STRENGTH(0) | VE_2_5V,
	EMI_A2 | STRENGTH(0) | VE_2_5V,
	EMI_A3 | STRENGTH(0) | VE_2_5V,
	EMI_A4 | STRENGTH(0) | VE_2_5V,
	EMI_A5 | STRENGTH(0) | VE_2_5V,
	EMI_A6 | STRENGTH(0) | VE_2_5V,
	EMI_A7 | STRENGTH(0) | VE_2_5V,
	EMI_A8 | STRENGTH(0) | VE_2_5V,
	EMI_A9 | STRENGTH(0) | VE_2_5V,
	EMI_A10 | STRENGTH(0) | VE_2_5V,
	EMI_A11 | STRENGTH(0) | VE_2_5V,
	EMI_A12 | STRENGTH(0) | VE_2_5V,

	/* SDRAM address control signals */
	EMI_RASN | STRENGTH(0) | VE_2_5V,
	EMI_CASN | STRENGTH(0) | VE_2_5V,

	/* SDRAM control signals */
	EMI_CE0N | STRENGTH(0) | VE_2_5V,
	EMI_CLK | STRENGTH(0) | VE_2_5V,
	EMI_CLKN | STRENGTH(0) | VE_2_5V,
	EMI_CKE | STRENGTH(0) | VE_2_5V,
	EMI_WEN | STRENGTH(0) | VE_2_5V,
	EMI_BA0 | STRENGTH(0) | VE_2_5V,
	EMI_BA1 | STRENGTH(0) | VE_2_5V,
	EMI_DQS0 | STRENGTH(0) | VE_2_5V,
	EMI_DQS1 | STRENGTH(0) | VE_2_5V,
#endif
	/* debug port */
	PWM1_DUART_TX | STRENGTH(S4MA),	/*  strength is TBD */
	PWM0_DUART_RX | STRENGTH(S4MA),	/*  strength is TBD */

	/* lcd */
	LCD_VSYNC | STRENGTH(S12MA),
	LCD_HSYNC | STRENGTH(S12MA),
	LCD_ENABE | STRENGTH(S12MA),
	LCD_DOTCLOCK | STRENGTH(S12MA),
	LCD_D17 | STRENGTH(S12MA),
	LCD_D16 | STRENGTH(S12MA),
	LCD_D15 | STRENGTH(S12MA),
	LCD_D14 | STRENGTH(S12MA),
	LCD_D13 | STRENGTH(S12MA),
	LCD_D12 | STRENGTH(S12MA),
	LCD_D11 | STRENGTH(S12MA),
	LCD_D10 | STRENGTH(S12MA),
	LCD_D9 | STRENGTH(S12MA),
	LCD_D8 | STRENGTH(S12MA),
	LCD_D7 | STRENGTH(S12MA),
	LCD_D6 | STRENGTH(S12MA),
	LCD_D5 | STRENGTH(S12MA),
	LCD_D4 | STRENGTH(S12MA),
	LCD_D3 | STRENGTH(S12MA),
	LCD_D2 | STRENGTH(S12MA),
	LCD_D1 | STRENGTH(S12MA),
	LCD_D0 | STRENGTH(S12MA),

	/* LCD usage currently unknown */
	LCD_CS,	/* used as SPI SS */
	LCD_RS,	/* used as SPI CLK */
	/* keep the display in reset state */
	LCD_RESET_GPIO | STRENGTH(S4MA) | GPIO_OUT | GPIO_VALUE(0),
	LCD_WR,	/* used as SPI MOSI */

	/* I2C to the MMA7455L, KXTE9, AT24C08 (DCID), AT24C128B (ID EEPROM) and QN8005B */
	I2C_SDA,
	I2C_CLK,

	/* Rotary decoder (external pull ups) */
	ROTARYA,
	ROTARYB,

	/* the chumby bend (external pull up) */
	PWM4_GPIO | GPIO_IN,

	/* backlight control, to be controled by PWM, here we only want to disable it */
	PWM2_GPIO | GPIO_OUT | GPIO_VALUE(0),	/* 1 enables, 0 disables the backlight */

	/* USB hub reset (active low) */
	AUART1_TX_GPIO | GPIO_OUT | GPIO_VALUE(0),

	/* USB power (active high) */
	AUART1_CTS_GPIO | GPIO_OUT | GPIO_VALUE(0),

	/* Detecting if a display is connected (0 = display attached) (external pull up) */
	AUART1_RTS_GPIO | GPIO_IN,

	/* disable the audio amplifier */
	GPMI_D08_GPIO | GPIO_OUT | GPIO_VALUE(0),

	/* Head Phone detection (FIXME what level when plugged in) (external pull up) */
	GPMI_D11_GPIO | GPIO_IN,

#if 0
	/* Enable the local 5V (FIXME what to do when the bootloader runs) */
	GPMI_D12_GPIO | GPIO_OUT | GPIO_VALUE(1),
#endif

	/* not used pins */
	GPMI_D09_GPIO | GPIO_IN | PULLUP(1),
	GPMI_D10_GPIO | GPIO_IN | PULLUP(1),
	GPMI_D13_GPIO | GPIO_IN | PULLUP(1),

	/* unknown. Not connected to anything than test pin J113 */
	GPMI_D14_GPIO | GPIO_IN | PULLUP(1),

	/* unknown. Not connected to anything than test pin J114 */
	GPMI_D15_GPIO | GPIO_IN | PULLUP(1),

	/* NAND controller (Note: There is no NAND device on the board) */
	GPMI_D00 | PULLUP(1),
	GPMI_D01 | PULLUP(1),
	GPMI_D02 | PULLUP(1),
	GPMI_D03 | PULLUP(1),
	GPMI_D04 | PULLUP(1),
	GPMI_D05 | PULLUP(1),
	GPMI_D06 | PULLUP(1),
	GPMI_D07 | PULLUP(1),
	GPMI_CE0N,
	GPMI_RDY0 | PULLUP(1),
	GPMI_WRN,	/* kernel tries here with 12 mA */
	GPMI_RDN,	/* kernel tries here with 12 mA */
	GPMI_WPM,	/* kernel tries here with 12 mA */
	GPMI_CLE,
	GPMI_ALE,

	/* SD card interface */
	SSP1_DATA0 | PULLUP(1),	/* available at J201 */
	SSP1_DATA1 | PULLUP(1),	/* available at J200 */
	SSP1_DATA2 | PULLUP(1),	/* available at J205 */
	SSP1_DATA3 | PULLUP(1),	/* available at J204 */
	SSP1_SCK,		/* available at J202 */
	SSP1_CMD | PULLUP(1),	/* available at J203 */
	SSP1_DETECT | PULLUP(1),	/* only connected to test pin J115 */

	/* other not used pins */
	GPMI_CE1N_GPIO | GPIO_IN | PULLUP(1),
	GPMI_CE2N_GPIO | GPIO_IN | PULLUP(1),
	GPMI_RDY1_GPIO | GPIO_IN | PULLUP(1),
	GPMI_RDY2_GPIO | GPIO_IN | PULLUP(1),
	GPMI_RDY3_GPIO | GPIO_IN | PULLUP(1),
};

static int falconwing_mem_init(void)
{
	arm_add_mem_device("ram0", IMX_MEMORY_BASE, 64 * 1024 * 1024);

	return 0;
}
mem_initcall(falconwing_mem_init);

#define GPIO_USB_HUB_RESET	29
#define GPIO_USB_HUB_POWER	26

static void falconwing_init_usb(void)
{
	/* power USB hub */
	gpio_direction_output(GPIO_USB_HUB_POWER, 1);
	mdelay(1);
	/* bring USB hub out of reset */
	gpio_direction_output(GPIO_USB_HUB_RESET, 1);

	imx23_usb_phy_enable();

	add_generic_usb_ehci_device(DEVICE_ID_DYNAMIC, IMX_USB_BASE, NULL);
}

static int falconwing_devices_init(void)
{
	int i;

	/* initizalize gpios */
	for (i = 0; i < ARRAY_SIZE(pad_setup); i++)
		imx_gpio_mode(pad_setup[i]);

	add_generic_device("mxs_mci", 0, NULL, IMX_SSP1_BASE, 0x2000,
			   IORESOURCE_MEM, &mci_pdata);
	add_generic_device("stmfb", 0, NULL, IMX_FB_BASE, 4096,
			   IORESOURCE_MEM, &fb_mode);

	falconwing_init_usb();

	armlinux_set_architecture(MACH_TYPE_CHUMBY);

	default_environment_path_set("/dev/disk0.1");

	return 0;
}

device_initcall(falconwing_devices_init);

static int falconwing_console_init(void)
{
	barebox_set_model("Chumby Falconwing");
	barebox_set_hostname("falconwing");

	add_generic_device("stm_serial", 0, NULL, IMX_DBGUART_BASE, 8192,
			   IORESOURCE_MEM, NULL);

	return 0;
}

console_initcall(falconwing_console_init);