Pull cpuidle into release branch
[pandora-kernel.git] / arch / arm / mach-pxa / zylonite_pxa320.c
1 /*
2  * linux/arch/arm/mach-pxa/zylonite_pxa320.c
3  *
4  * PXA320 specific support code for the
5  * PXA3xx Development Platform (aka Zylonite)
6  *
7  * Copyright (C) 2007 Marvell Internation Ltd.
8  * 2007-08-21: eric miao <eric.miao@marvell.com>
9  *             initial version
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License version 2 as
13  * published by the Free Software Foundation.
14  */
15
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19
20 #include <asm/arch/gpio.h>
21 #include <asm/arch/mfp-pxa320.h>
22 #include <asm/arch/zylonite.h>
23
24 #define ARRAY_AND_SIZE(x)       (x), ARRAY_SIZE(x)
25
26 static mfp_cfg_t mfp_cfg[] __initdata = {
27         /* LCD */
28         GPIO6_2_LCD_LDD_0,
29         GPIO7_2_LCD_LDD_1,
30         GPIO8_2_LCD_LDD_2,
31         GPIO9_2_LCD_LDD_3,
32         GPIO10_2_LCD_LDD_4,
33         GPIO11_2_LCD_LDD_5,
34         GPIO12_2_LCD_LDD_6,
35         GPIO13_2_LCD_LDD_7,
36         GPIO63_LCD_LDD_8,
37         GPIO64_LCD_LDD_9,
38         GPIO65_LCD_LDD_10,
39         GPIO66_LCD_LDD_11,
40         GPIO67_LCD_LDD_12,
41         GPIO68_LCD_LDD_13,
42         GPIO69_LCD_LDD_14,
43         GPIO70_LCD_LDD_15,
44         GPIO71_LCD_LDD_16,
45         GPIO72_LCD_LDD_17,
46         GPIO73_LCD_CS_N,
47         GPIO74_LCD_VSYNC,
48         GPIO14_2_LCD_FCLK,
49         GPIO15_2_LCD_LCLK,
50         GPIO16_2_LCD_PCLK,
51         GPIO17_2_LCD_BIAS,
52
53         /* FFUART */
54         GPIO41_UART1_RXD,
55         GPIO42_UART1_TXD,
56         GPIO43_UART1_CTS,
57         GPIO44_UART1_DCD,
58         GPIO45_UART1_DSR,
59         GPIO46_UART1_RI,
60         GPIO47_UART1_DTR,
61         GPIO48_UART1_RTS,
62
63         /* AC97 */
64         GPIO34_AC97_SYSCLK,
65         GPIO35_AC97_SDATA_IN_0,
66         GPIO37_AC97_SDATA_OUT,
67         GPIO38_AC97_SYNC,
68         GPIO39_AC97_BITCLK,
69         GPIO40_AC97_nACRESET,
70
71         /* I2C */
72         GPIO32_I2C_SCL,
73         GPIO33_I2C_SDA,
74
75         /* Keypad */
76         GPIO105_KP_DKIN_0,
77         GPIO106_KP_DKIN_1,
78         GPIO113_KP_MKIN_0,
79         GPIO114_KP_MKIN_1,
80         GPIO115_KP_MKIN_2,
81         GPIO116_KP_MKIN_3,
82         GPIO117_KP_MKIN_4,
83         GPIO118_KP_MKIN_5,
84         GPIO119_KP_MKIN_6,
85         GPIO120_KP_MKIN_7,
86         GPIO121_KP_MKOUT_0,
87         GPIO122_KP_MKOUT_1,
88         GPIO123_KP_MKOUT_2,
89         GPIO124_KP_MKOUT_3,
90         GPIO125_KP_MKOUT_4,
91         GPIO126_KP_MKOUT_5,
92         GPIO127_KP_MKOUT_6,
93         GPIO5_2_KP_MKOUT_7,
94
95         /* Ethernet */
96         GPIO4_nCS3,
97         GPIO90_GPIO,
98 };
99
100 #define NUM_LCD_DETECT_PINS     7
101
102 static int lcd_detect_pins[] __initdata = {
103         MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
104         MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
105         MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
106         MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
107         MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
108         MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
109         MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
110         /*
111          * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
112          * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
113          */
114         MFP_PIN_GPIO14,
115         MFP_PIN_GPIO15,
116         MFP_PIN_GPIO17,
117 };
118
119 static int lcd_detect_mfpr[] __initdata = {
120         /* AF0, DS 1X, Pull Neither, Edge Clear */
121         0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
122         0xc442, /* Backlight, Pull-Up, AF2 */
123         0x8445, /* AF5 */
124         0x8445, /* AF5 */
125 };
126
127 static void __init zylonite_detect_lcd_panel(void)
128 {
129         unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
130         int i, gpio, id = 0;
131
132         /* save the original MFP settings of these pins and configure them
133          * as GPIO Input, DS01X, Pull Neither, Edge Clear
134          */
135         for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
136                 mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
137                 pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
138         }
139
140         for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
141                 id = id << 1;
142                 gpio = mfp_to_gpio(lcd_detect_pins[i]);
143                 gpio_direction_input(gpio);
144
145                 if (gpio_get_value(gpio))
146                         id = id | 0x1;
147         }
148
149         /* lcd id, flush out bit 1 */
150         lcd_id = id & 0x3d;
151
152         /* lcd orientation, portrait or landscape */
153         lcd_orientation = (id >> 6) & 0x1;
154
155         /* restore the original MFP settings */
156         for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
157                 pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
158 }
159
160 void __init zylonite_pxa320_init(void)
161 {
162         if (cpu_is_pxa320()) {
163                 /* initialize MFP */
164                 pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));
165
166                 /* detect LCD panel */
167                 zylonite_detect_lcd_panel();
168
169                 /* GPIO pin assignment */
170                 gpio_backlight  = mfp_to_gpio(MFP_PIN_GPIO14);
171                 gpio_eth_irq    = mfp_to_gpio(MFP_PIN_GPIO9);
172         }
173 }