1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * linux/arch/arm/mach-pxa/zylonite_pxa320.c
  4 *
  5 * PXA320 specific support code for the
  6 * PXA3xx Development Platform (aka Zylonite)
  7 *
  8 * Copyright (C) 2007 Marvell Internation Ltd.
  9 * 2007-08-21: eric miao <eric.miao@marvell.com>
 10 *             initial version
 11 */
 12
 13#include <linux/module.h>
 14#include <linux/kernel.h>
 15#include <linux/init.h>
 16#include <linux/gpio.h>
 17
 18#include "pxa320.h"
 19#include "zylonite.h"
 20
 21#include "generic.h"
 22
 23static mfp_cfg_t mfp_cfg[] __initdata = {
 24	/* LCD */
 25	GPIO6_2_LCD_LDD_0,
 26	GPIO7_2_LCD_LDD_1,
 27	GPIO8_2_LCD_LDD_2,
 28	GPIO9_2_LCD_LDD_3,
 29	GPIO10_2_LCD_LDD_4,
 30	GPIO11_2_LCD_LDD_5,
 31	GPIO12_2_LCD_LDD_6,
 32	GPIO13_2_LCD_LDD_7,
 33	GPIO63_LCD_LDD_8,
 34	GPIO64_LCD_LDD_9,
 35	GPIO65_LCD_LDD_10,
 36	GPIO66_LCD_LDD_11,
 37	GPIO67_LCD_LDD_12,
 38	GPIO68_LCD_LDD_13,
 39	GPIO69_LCD_LDD_14,
 40	GPIO70_LCD_LDD_15,
 41	GPIO71_LCD_LDD_16,
 42	GPIO72_LCD_LDD_17,
 43	GPIO73_LCD_CS_N,
 44	GPIO74_LCD_VSYNC,
 45	GPIO14_2_LCD_FCLK,
 46	GPIO15_2_LCD_LCLK,
 47	GPIO16_2_LCD_PCLK,
 48	GPIO17_2_LCD_BIAS,
 49	GPIO14_PWM3_OUT,	/* backlight */
 50
 51	/* FFUART */
 52	GPIO41_UART1_RXD | MFP_LPM_EDGE_FALL,
 53	GPIO42_UART1_TXD,
 54	GPIO43_UART1_CTS,
 55	GPIO44_UART1_DCD,
 56	GPIO45_UART1_DSR | MFP_LPM_EDGE_FALL,
 57	GPIO46_UART1_RI,
 58	GPIO47_UART1_DTR,
 59	GPIO48_UART1_RTS,
 60
 61	/* AC97 */
 62	GPIO34_AC97_SYSCLK,
 63	GPIO35_AC97_SDATA_IN_0,
 64	GPIO37_AC97_SDATA_OUT,
 65	GPIO38_AC97_SYNC,
 66	GPIO39_AC97_BITCLK,
 67	GPIO40_AC97_nACRESET,
 68	GPIO36_GPIO,	/* SDATA_IN_1 but unused - configure to GPIO */
 69
 70	/* SSP3 */
 71	GPIO89_SSP3_SCLK,
 72	GPIO90_SSP3_FRM,
 73	GPIO91_SSP3_TXD,
 74	GPIO92_SSP3_RXD,
 75
 76	/* WM9713 IRQ */
 77	GPIO15_GPIO,
 78
 79	/* I2C */
 80	GPIO32_I2C_SCL,
 81	GPIO33_I2C_SDA,
 82
 83	/* Keypad */
 84	GPIO105_KP_DKIN_0 | MFP_LPM_EDGE_BOTH,
 85	GPIO106_KP_DKIN_1 | MFP_LPM_EDGE_BOTH,
 86	GPIO113_KP_MKIN_0 | MFP_LPM_EDGE_BOTH,
 87	GPIO114_KP_MKIN_1 | MFP_LPM_EDGE_BOTH,
 88	GPIO115_KP_MKIN_2 | MFP_LPM_EDGE_BOTH,
 89	GPIO116_KP_MKIN_3 | MFP_LPM_EDGE_BOTH,
 90	GPIO117_KP_MKIN_4 | MFP_LPM_EDGE_BOTH,
 91	GPIO118_KP_MKIN_5 | MFP_LPM_EDGE_BOTH,
 92	GPIO119_KP_MKIN_6 | MFP_LPM_EDGE_BOTH,
 93	GPIO120_KP_MKIN_7 | MFP_LPM_EDGE_BOTH,
 94	GPIO121_KP_MKOUT_0,
 95	GPIO122_KP_MKOUT_1,
 96	GPIO123_KP_MKOUT_2,
 97	GPIO124_KP_MKOUT_3,
 98	GPIO125_KP_MKOUT_4,
 99	GPIO126_KP_MKOUT_5,
100	GPIO127_KP_MKOUT_6,
101	GPIO5_2_KP_MKOUT_7,
102
103	/* Ethernet */
104	GPIO4_nCS3,
105	GPIO90_GPIO,
106
107	/* MMC1 */
108	GPIO18_MMC1_DAT0,
109	GPIO19_MMC1_DAT1 | MFP_LPM_EDGE_BOTH,
110	GPIO20_MMC1_DAT2,
111	GPIO21_MMC1_DAT3,
112	GPIO22_MMC1_CLK,
113	GPIO23_MMC1_CMD,/* CMD0 for slot 0 */
114	GPIO31_GPIO,	/* CMD1 default as GPIO for slot 0 */
115
116	/* MMC2 */
117	GPIO24_MMC2_DAT0,
118	GPIO25_MMC2_DAT1 | MFP_LPM_EDGE_BOTH,
119	GPIO26_MMC2_DAT2,
120	GPIO27_MMC2_DAT3,
121	GPIO28_MMC2_CLK,
122	GPIO29_MMC2_CMD,
123
124	/* USB Host */
125	GPIO2_2_USBH_PEN,
126	GPIO3_2_USBH_PWR,
127
128	/* Debug LEDs */
129	GPIO1_2_GPIO | MFP_LPM_DRIVE_HIGH,
130	GPIO4_2_GPIO | MFP_LPM_DRIVE_HIGH,
131};
132
133#define NUM_LCD_DETECT_PINS	7
134
135static int lcd_detect_pins[] __initdata = {
136	MFP_PIN_GPIO72,   /* LCD_LDD_17 - ORIENT */
137	MFP_PIN_GPIO71,   /* LCD_LDD_16 - LCDID[5] */
138	MFP_PIN_GPIO17_2, /* LCD_BIAS   - LCDID[4] */
139	MFP_PIN_GPIO15_2, /* LCD_LCLK   - LCDID[3] */
140	MFP_PIN_GPIO14_2, /* LCD_FCLK   - LCDID[2] */
141	MFP_PIN_GPIO73,   /* LCD_CS_N   - LCDID[1] */
142	MFP_PIN_GPIO74,   /* LCD_VSYNC  - LCDID[0] */
143	/*
144	 * set the MFP_PIN_GPIO 14/15/17 to alternate function other than
145	 * GPIO to avoid input level confliction with 14_2, 15_2, 17_2
146	 */
147	MFP_PIN_GPIO14,
148	MFP_PIN_GPIO15,
149	MFP_PIN_GPIO17,
150};
151
152static int lcd_detect_mfpr[] __initdata = {
153	/* AF0, DS 1X, Pull Neither, Edge Clear */
154	0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440, 0x8440,
155	0xc442, /* Backlight, Pull-Up, AF2 */
156	0x8445, /* AF5 */
157	0x8445, /* AF5 */
158};
159
160static void __init zylonite_detect_lcd_panel(void)
161{
162	unsigned long mfpr_save[ARRAY_SIZE(lcd_detect_pins)];
163	int i, gpio, id = 0;
164
165	/* save the original MFP settings of these pins and configure them
166	 * as GPIO Input, DS01X, Pull Neither, Edge Clear
167	 */
168	for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++) {
169		mfpr_save[i] = pxa3xx_mfp_read(lcd_detect_pins[i]);
170		pxa3xx_mfp_write(lcd_detect_pins[i], lcd_detect_mfpr[i]);
171	}
172
173	for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
174		id = id << 1;
175		gpio = mfp_to_gpio(lcd_detect_pins[i]);
176		gpio_request(gpio, "LCD_ID_PINS");
177		gpio_direction_input(gpio);
178
179		if (gpio_get_value(gpio))
180			id = id | 0x1;
181		gpio_free(gpio);
182	}
183
184	/* lcd id, flush out bit 1 */
185	lcd_id = id & 0x3d;
186
187	/* lcd orientation, portrait or landscape */
188	lcd_orientation = (id >> 6) & 0x1;
189
190	/* restore the original MFP settings */
191	for (i = 0; i < ARRAY_SIZE(lcd_detect_pins); i++)
192		pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
193}
194
195void __init zylonite_pxa320_init(void)
196{
197	if (cpu_is_pxa320()) {
198		/* initialize MFP */
199		pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_cfg));
200
201		/* detect LCD panel */
202		zylonite_detect_lcd_panel();
203
204		/* GPIO pin assignment */
205		gpio_eth_irq	= mfp_to_gpio(MFP_PIN_GPIO9);
206		gpio_debug_led1	= mfp_to_gpio(MFP_PIN_GPIO1_2);
207		gpio_debug_led2	= mfp_to_gpio(MFP_PIN_GPIO4_2);
208
209		/* WM9713 IRQ */
210		wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO15);
211	}
212}