gplugd.c revision f55be1bf52aad524dc1bf556ae26c90262c87825 
1/*
2 *  linux/arch/arm/mach-mmp/gplugd.c
3 *
4 *  Support for the Marvell PXA168-based GuruPlug Display (gplugD) Platform.
5 *
6 *  This program is free software; you can redistribute it and/or modify
7 *  it under the terms of the GNU General Public License version 2 as
8 *  publishhed by the Free Software Foundation.
9 */
10
11#include <linux/init.h>
12#include <linux/gpio.h>
13
14#include <asm/mach/arch.h>
15#include <asm/mach-types.h>
16
17#include <mach/pxa168.h>
18#include <mach/mfp-pxa168.h>
19#include <mach/mfp-gplugd.h>
20
21#include "common.h"
22
23static unsigned long gplugd_pin_config[] __initdata = {
24	/* UART3 */
25	GPIO8_UART3_SOUT,
26	GPIO9_UART3_SIN,
27	GPI1O_UART3_CTS,
28	GPI11_UART3_RTS,
29
30	/* MMC2 */
31	GPIO28_MMC2_CMD,
32	GPIO29_MMC2_CLK,
33	GPIO30_MMC2_DAT0,
34	GPIO31_MMC2_DAT1,
35	GPIO32_MMC2_DAT2,
36	GPIO33_MMC2_DAT3,
37
38	/* LCD & HDMI clock selection GPIO: 0: 74.176MHz, 1: 74.25 MHz */
39	GPIO35_GPIO,
40	GPIO36_GPIO, /* CEC Interrupt */
41
42	/* MMC1 */
43	GPIO43_MMC1_CLK,
44	GPIO49_MMC1_CMD,
45	GPIO41_MMC1_DAT0,
46	GPIO40_MMC1_DAT1,
47	GPIO52_MMC1_DAT2,
48	GPIO51_MMC1_DAT3,
49	GPIO53_MMC1_CD,
50
51	/* LCD */
52	GPIO56_LCD_FCLK_RD,
53	GPIO57_LCD_LCLK_A0,
54	GPIO58_LCD_PCLK_WR,
55	GPIO59_LCD_DENA_BIAS,
56	GPIO60_LCD_DD0,
57	GPIO61_LCD_DD1,
58	GPIO62_LCD_DD2,
59	GPIO63_LCD_DD3,
60	GPIO64_LCD_DD4,
61	GPIO65_LCD_DD5,
62	GPIO66_LCD_DD6,
63	GPIO67_LCD_DD7,
64	GPIO68_LCD_DD8,
65	GPIO69_LCD_DD9,
66	GPIO70_LCD_DD10,
67	GPIO71_LCD_DD11,
68	GPIO72_LCD_DD12,
69	GPIO73_LCD_DD13,
70	GPIO74_LCD_DD14,
71	GPIO75_LCD_DD15,
72	GPIO76_LCD_DD16,
73	GPIO77_LCD_DD17,
74	GPIO78_LCD_DD18,
75	GPIO79_LCD_DD19,
76	GPIO80_LCD_DD20,
77	GPIO81_LCD_DD21,
78	GPIO82_LCD_DD22,
79	GPIO83_LCD_DD23,
80
81	/* GPIO */
82	GPIO84_GPIO,
83	GPIO85_GPIO,
84
85	/* Fast-Ethernet*/
86	GPIO86_TX_CLK,
87	GPIO87_TX_EN,
88	GPIO88_TX_DQ3,
89	GPIO89_TX_DQ2,
90	GPIO90_TX_DQ1,
91	GPIO91_TX_DQ0,
92	GPIO92_MII_CRS,
93	GPIO93_MII_COL,
94	GPIO94_RX_CLK,
95	GPIO95_RX_ER,
96	GPIO96_RX_DQ3,
97	GPIO97_RX_DQ2,
98	GPIO98_RX_DQ1,
99	GPIO99_RX_DQ0,
100	GPIO100_MII_MDC,
101	GPIO101_MII_MDIO,
102	GPIO103_RX_DV,
103	GPIO104_GPIO,     /* Reset PHY */
104
105	/* RTC interrupt */
106	GPIO102_GPIO,
107
108	/* I2C */
109	GPIO105_CI2C_SDA,
110	GPIO106_CI2C_SCL,
111
112	/* Select JTAG */
113	GPIO109_GPIO,
114
115	/* I2S */
116	GPIO114_I2S_FRM,
117	GPIO115_I2S_BCLK,
118	GPIO116_I2S_TXD
119};
120
121static struct i2c_board_info gplugd_i2c_board_info[] = {
122	{
123		.type = "isl1208",
124		.addr = 0x6F,
125	}
126};
127
128/* Bring PHY out of reset by setting GPIO 104 */
129static int gplugd_eth_init(void)
130{
131	if (unlikely(gpio_request(104, "ETH_RESET_N"))) {
132		printk(KERN_ERR "Can't get hold of GPIO 104 to bring Ethernet "
133				"PHY out of reset\n");
134		return -EIO;
135	}
136
137	gpio_direction_output(104, 1);
138	gpio_free(104);
139	return 0;
140}
141
142struct pxa168_eth_platform_data gplugd_eth_platform_data = {
143	.port_number = 0,
144	.phy_addr    = 0,
145	.speed       = 0, /* Autonagotiation */
146	.init        = gplugd_eth_init,
147};
148
149static void __init select_disp_freq(void)
150{
151	/* set GPIO 35 & clear GPIO 85 to set LCD External Clock to 74.25 MHz */
152	if (unlikely(gpio_request(35, "DISP_FREQ_SEL"))) {
153		printk(KERN_ERR "Can't get hold of GPIO 35 to select display "
154				"frequency\n");
155	} else {
156		gpio_direction_output(35, 1);
157		gpio_free(104);
158	}
159
160	if (unlikely(gpio_request(85, "DISP_FREQ_SEL_2"))) {
161		printk(KERN_ERR "Can't get hold of GPIO 85 to select display "
162				"frequency\n");
163	} else {
164		gpio_direction_output(85, 0);
165		gpio_free(104);
166	}
167}
168
169static void __init gplugd_init(void)
170{
171	mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));
172
173	select_disp_freq();
174
175	/* on-chip devices */
176	pxa168_add_uart(3);
177	pxa168_add_ssp(0);
178	pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
179
180	pxa168_add_eth(&gplugd_eth_platform_data);
181}
182
183MACHINE_START(SHEEVAD, "PXA168-based GuruPlug Display (gplugD) Platform")
184	.map_io		= mmp_map_io,
185	.nr_irqs	= IRQ_BOARD_START,
186	.init_irq       = pxa168_init_irq,
187	.timer          = &pxa168_timer,
188	.init_machine   = gplugd_init,
189MACHINE_END
190