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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 
20 #include "common.h"
21 
22 static unsigned long gplugd_pin_config[] __initdata = {
23 	/* UART3 */
24 	GPIO8_UART3_TXD,
25 	GPIO9_UART3_RXD,
26 	GPIO1O_UART3_CTS,
27 	GPIO11_UART3_RTS,
28 
29 	/* USB OTG PEN */
30 	GPIO18_GPIO,
31 
32 	/* MMC2 */
33 	GPIO28_MMC2_CMD,
34 	GPIO29_MMC2_CLK,
35 	GPIO30_MMC2_DAT0,
36 	GPIO31_MMC2_DAT1,
37 	GPIO32_MMC2_DAT2,
38 	GPIO33_MMC2_DAT3,
39 
40 	/* LCD & HDMI clock selection GPIO: 0: 74.176MHz, 1: 74.25 MHz */
41 	GPIO35_GPIO,
42 	GPIO36_GPIO, /* CEC Interrupt */
43 
44 	/* MMC1 */
45 	GPIO43_MMC1_CLK,
46 	GPIO49_MMC1_CMD,
47 	GPIO41_MMC1_DAT0,
48 	GPIO40_MMC1_DAT1,
49 	GPIO52_MMC1_DAT2,
50 	GPIO51_MMC1_DAT3,
51 	GPIO53_MMC1_CD,
52 
53 	/* LCD */
54 	GPIO56_LCD_FCLK_RD,
55 	GPIO57_LCD_LCLK_A0,
56 	GPIO58_LCD_PCLK_WR,
57 	GPIO59_LCD_DENA_BIAS,
58 	GPIO60_LCD_DD0,
59 	GPIO61_LCD_DD1,
60 	GPIO62_LCD_DD2,
61 	GPIO63_LCD_DD3,
62 	GPIO64_LCD_DD4,
63 	GPIO65_LCD_DD5,
64 	GPIO66_LCD_DD6,
65 	GPIO67_LCD_DD7,
66 	GPIO68_LCD_DD8,
67 	GPIO69_LCD_DD9,
68 	GPIO70_LCD_DD10,
69 	GPIO71_LCD_DD11,
70 	GPIO72_LCD_DD12,
71 	GPIO73_LCD_DD13,
72 	GPIO74_LCD_DD14,
73 	GPIO75_LCD_DD15,
74 	GPIO76_LCD_DD16,
75 	GPIO77_LCD_DD17,
76 	GPIO78_LCD_DD18,
77 	GPIO79_LCD_DD19,
78 	GPIO80_LCD_DD20,
79 	GPIO81_LCD_DD21,
80 	GPIO82_LCD_DD22,
81 	GPIO83_LCD_DD23,
82 
83 	/* GPIO */
84 	GPIO84_GPIO,
85 	GPIO85_GPIO,
86 
87 	/* Fast-Ethernet*/
88 	GPIO86_TX_CLK,
89 	GPIO87_TX_EN,
90 	GPIO88_TX_DQ3,
91 	GPIO89_TX_DQ2,
92 	GPIO90_TX_DQ1,
93 	GPIO91_TX_DQ0,
94 	GPIO92_MII_CRS,
95 	GPIO93_MII_COL,
96 	GPIO94_RX_CLK,
97 	GPIO95_RX_ER,
98 	GPIO96_RX_DQ3,
99 	GPIO97_RX_DQ2,
100 	GPIO98_RX_DQ1,
101 	GPIO99_RX_DQ0,
102 	GPIO100_MII_MDC,
103 	GPIO101_MII_MDIO,
104 	GPIO103_RX_DV,
105 	GPIO104_GPIO,     /* Reset PHY */
106 
107 	/* RTC interrupt */
108 	GPIO102_GPIO,
109 
110 	/* I2C */
111 	GPIO105_CI2C_SDA,
112 	GPIO106_CI2C_SCL,
113 
114 	/* SPI NOR Flash on SSP2 */
115 	GPIO107_SSP2_RXD,
116 	GPIO108_SSP2_TXD,
117 	GPIO110_GPIO,     /* SPI_CSn */
118 	GPIO111_SSP2_CLK,
119 
120 	/* Select JTAG */
121 	GPIO109_GPIO,
122 
123 	/* I2S */
124 	GPIO114_I2S_FRM,
125 	GPIO115_I2S_BCLK,
126 	GPIO116_I2S_TXD
127 };
128 
129 static struct i2c_board_info gplugd_i2c_board_info[] = {
130 	{
131 		.type = "isl1208",
132 		.addr = 0x6F,
133 	}
134 };
135 
136 /* Bring PHY out of reset by setting GPIO 104 */
gplugd_eth_init(void)137 static int gplugd_eth_init(void)
138 {
139 	if (unlikely(gpio_request(104, "ETH_RESET_N"))) {
140 		printk(KERN_ERR "Can't get hold of GPIO 104 to bring Ethernet "
141 				"PHY out of reset\n");
142 		return -EIO;
143 	}
144 
145 	gpio_direction_output(104, 1);
146 	gpio_free(104);
147 	return 0;
148 }
149 
150 struct pxa168_eth_platform_data gplugd_eth_platform_data = {
151 	.port_number = 0,
152 	.phy_addr    = 0,
153 	.speed       = 0, /* Autonagotiation */
154 	.init        = gplugd_eth_init,
155 };
156 
select_disp_freq(void)157 static void __init select_disp_freq(void)
158 {
159 	/* set GPIO 35 & clear GPIO 85 to set LCD External Clock to 74.25 MHz */
160 	if (unlikely(gpio_request(35, "DISP_FREQ_SEL"))) {
161 		printk(KERN_ERR "Can't get hold of GPIO 35 to select display "
162 				"frequency\n");
163 	} else {
164 		gpio_direction_output(35, 1);
165 		gpio_free(35);
166 	}
167 
168 	if (unlikely(gpio_request(85, "DISP_FREQ_SEL_2"))) {
169 		printk(KERN_ERR "Can't get hold of GPIO 85 to select display "
170 				"frequency\n");
171 	} else {
172 		gpio_direction_output(85, 0);
173 		gpio_free(85);
174 	}
175 }
176 
gplugd_init(void)177 static void __init gplugd_init(void)
178 {
179 	mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));
180 
181 	select_disp_freq();
182 
183 	/* on-chip devices */
184 	pxa168_add_uart(3);
185 	pxa168_add_ssp(1);
186 	pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
187 	platform_device_register(&pxa168_device_gpio);
188 
189 	pxa168_add_eth(&gplugd_eth_platform_data);
190 }
191 
192 MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform")
193 	.map_io		= mmp_map_io,
194 	.nr_irqs	= MMP_NR_IRQS,
195 	.init_irq       = pxa168_init_irq,
196 	.timer          = &pxa168_timer,
197 	.init_machine   = gplugd_init,
198 	.restart	= pxa168_restart,
199 MACHINE_END
200