1/*
2 *  linux/arch/arm/mach-pxa/gumstix.c
3 *
4 *  Support for the Gumstix motherboards.
5 *
6 *  Original Author:	Craig Hughes
7 *  Created:	Feb 14, 2008
8 *  Copyright:	Craig Hughes
9 *
10 *  This program is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 2 as
12 *  published by the Free Software Foundation.
13 *
14 *  Implemented based on lubbock.c by Nicolas Pitre and code from Craig
15 *  Hughes
16 */
17
18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/platform_device.h>
22#include <linux/interrupt.h>
23#include <linux/delay.h>
24#include <linux/mtd/mtd.h>
25#include <linux/mtd/partitions.h>
26#include <linux/gpio.h>
27#include <linux/err.h>
28#include <linux/clk.h>
29#include <linux/usb/gpio_vbus.h>
30
31#include <asm/setup.h>
32#include <asm/memory.h>
33#include <asm/mach-types.h>
34#include <mach/hardware.h>
35#include <asm/irq.h>
36#include <asm/sizes.h>
37
38#include <asm/mach/arch.h>
39#include <asm/mach/map.h>
40#include <asm/mach/irq.h>
41#include <asm/mach/flash.h>
42
43#include <mach/pxa25x.h>
44#include <linux/platform_data/mmc-pxamci.h>
45#include <mach/udc.h>
46#include <mach/gumstix.h>
47
48#include "generic.h"
49
50static struct resource flash_resource = {
51	.start	= 0x00000000,
52	.end	= SZ_64M - 1,
53	.flags	= IORESOURCE_MEM,
54};
55
56static struct mtd_partition gumstix_partitions[] = {
57	{
58		.name =		"Bootloader",
59		.size =		0x00040000,
60		.offset =	0,
61		.mask_flags =	MTD_WRITEABLE  /* force read-only */
62	} , {
63		.name =		"rootfs",
64		.size =		MTDPART_SIZ_FULL,
65		.offset =	MTDPART_OFS_APPEND
66	}
67};
68
69static struct flash_platform_data gumstix_flash_data = {
70	.map_name	= "cfi_probe",
71	.parts		= gumstix_partitions,
72	.nr_parts	= ARRAY_SIZE(gumstix_partitions),
73	.width		= 2,
74};
75
76static struct platform_device gumstix_flash_device = {
77	.name		= "pxa2xx-flash",
78	.id		= 0,
79	.dev = {
80		.platform_data = &gumstix_flash_data,
81	},
82	.resource = &flash_resource,
83	.num_resources = 1,
84};
85
86static struct platform_device *devices[] __initdata = {
87	&gumstix_flash_device,
88};
89
90#ifdef CONFIG_MMC_PXA
91static struct pxamci_platform_data gumstix_mci_platform_data = {
92	.ocr_mask		= MMC_VDD_32_33|MMC_VDD_33_34,
93	.gpio_card_detect 	= -1,
94	.gpio_card_ro		= -1,
95	.gpio_power		= -1,
96};
97
98static void __init gumstix_mmc_init(void)
99{
100	pxa_set_mci_info(&gumstix_mci_platform_data);
101}
102#else
103static void __init gumstix_mmc_init(void)
104{
105	pr_debug("Gumstix mmc disabled\n");
106}
107#endif
108
109#ifdef CONFIG_USB_PXA25X
110static struct gpio_vbus_mach_info gumstix_udc_info = {
111	.gpio_vbus		= GPIO_GUMSTIX_USB_GPIOn,
112	.gpio_pullup		= GPIO_GUMSTIX_USB_GPIOx,
113};
114
115static struct platform_device gumstix_gpio_vbus = {
116	.name	= "gpio-vbus",
117	.id	= -1,
118	.dev	= {
119		.platform_data	= &gumstix_udc_info,
120	},
121};
122
123static void __init gumstix_udc_init(void)
124{
125	platform_device_register(&gumstix_gpio_vbus);
126}
127#else
128static void gumstix_udc_init(void)
129{
130	pr_debug("Gumstix udc is disabled\n");
131}
132#endif
133
134#ifdef CONFIG_BT
135/* Normally, the bootloader would have enabled this 32kHz clock but many
136** boards still have u-boot 1.1.4 so we check if it has been turned on and
137** if not, we turn it on with a warning message. */
138static void gumstix_setup_bt_clock(void)
139{
140	int timeout = 500;
141
142	if (!(OSCC & OSCC_OOK))
143		pr_warn("32kHz clock was not on. Bootloader may need to be updated\n");
144	else
145		return;
146
147	OSCC |= OSCC_OON;
148	do {
149		if (OSCC & OSCC_OOK)
150			break;
151		udelay(1);
152	} while (--timeout);
153	if (!timeout)
154		pr_err("Failed to start 32kHz clock\n");
155}
156
157static void __init gumstix_bluetooth_init(void)
158{
159	int err;
160
161	gumstix_setup_bt_clock();
162
163	err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
164	if (err) {
165		pr_err("gumstix: failed request gpio for bluetooth reset\n");
166		return;
167	}
168
169	err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
170	if (err) {
171		pr_err("gumstix: can't reset bluetooth\n");
172		return;
173	}
174	gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
175	udelay(100);
176	gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
177}
178#else
179static void gumstix_bluetooth_init(void)
180{
181	pr_debug("Gumstix Bluetooth is disabled\n");
182}
183#endif
184
185static unsigned long gumstix_pin_config[] __initdata = {
186	GPIO12_32KHz,
187	/* BTUART */
188	GPIO42_HWUART_RXD,
189	GPIO43_HWUART_TXD,
190	GPIO44_HWUART_CTS,
191	GPIO45_HWUART_RTS,
192	/* MMC */
193	GPIO6_MMC_CLK,
194	GPIO53_MMC_CLK,
195	GPIO8_MMC_CS0,
196};
197
198int __attribute__((weak)) am200_init(void)
199{
200	return 0;
201}
202
203int __attribute__((weak)) am300_init(void)
204{
205	return 0;
206}
207
208static void __init carrier_board_init(void)
209{
210	/*
211	 * put carrier/expansion board init here if
212	 * they cannot be detected programatically
213	 */
214	am200_init();
215	am300_init();
216}
217
218static void __init gumstix_init(void)
219{
220	pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
221
222	pxa_set_ffuart_info(NULL);
223	pxa_set_btuart_info(NULL);
224	pxa_set_stuart_info(NULL);
225	pxa_set_hwuart_info(NULL);
226
227	gumstix_bluetooth_init();
228	gumstix_udc_init();
229	gumstix_mmc_init();
230	(void) platform_add_devices(devices, ARRAY_SIZE(devices));
231	carrier_board_init();
232}
233
234MACHINE_START(GUMSTIX, "Gumstix")
235	.atag_offset	= 0x100, /* match u-boot bi_boot_params */
236	.map_io		= pxa25x_map_io,
237	.nr_irqs	= PXA_NR_IRQS,
238	.init_irq	= pxa25x_init_irq,
239	.handle_irq	= pxa25x_handle_irq,
240	.init_time	= pxa_timer_init,
241	.init_machine	= gumstix_init,
242	.restart	= pxa_restart,
243MACHINE_END
244