1/*
2 * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code)
3 *
4 * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
5 * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 */
12
13#include <linux/kernel.h>
14#include <linux/gpio.h>
15#include <linux/gpio_keys.h>
16#include <linux/input.h>
17#include <linux/mfd/htc-egpio.h>
18#include <linux/mtd/mtd.h>
19#include <linux/mtd/partitions.h>
20#include <linux/platform_data/sa11x0-serial.h>
21#include <linux/platform_device.h>
22#include <linux/serial_core.h>
23
24#include <asm/mach/flash.h>
25#include <asm/mach/map.h>
26
27#include <mach/h3xxx.h>
28#include <mach/irqs.h>
29
30#include "generic.h"
31
32/*
33 * H3xxx flash support
34 */
35static struct mtd_partition h3xxx_partitions[] = {
36	{
37		.name		= "H3XXX boot firmware",
38		.size		= 0x00040000,
39		.offset		= 0,
40		.mask_flags	= MTD_WRITEABLE,  /* force read-only */
41	}, {
42		.name		= "H3XXX rootfs",
43		.size		= MTDPART_SIZ_FULL,
44		.offset		= 0x00040000,
45	}
46};
47
48static void h3xxx_set_vpp(int vpp)
49{
50	gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
51}
52
53static int h3xxx_flash_init(void)
54{
55	int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
56	if (err) {
57		pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
58		return err;
59	}
60
61	err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
62	if (err)
63		gpio_free(H3XXX_EGPIO_VPP_ON);
64
65	return err;
66}
67
68static void h3xxx_flash_exit(void)
69{
70	gpio_free(H3XXX_EGPIO_VPP_ON);
71}
72
73static struct flash_platform_data h3xxx_flash_data = {
74	.map_name	= "cfi_probe",
75	.set_vpp	= h3xxx_set_vpp,
76	.init		= h3xxx_flash_init,
77	.exit		= h3xxx_flash_exit,
78	.parts		= h3xxx_partitions,
79	.nr_parts	= ARRAY_SIZE(h3xxx_partitions),
80};
81
82static struct resource h3xxx_flash_resource =
83	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
84
85
86/*
87 * H3xxx uart support
88 */
89static struct gpio h3xxx_uart_gpio[] = {
90	{ H3XXX_GPIO_COM_DCD,	GPIOF_IN,		"COM DCD" },
91	{ H3XXX_GPIO_COM_CTS,	GPIOF_IN,		"COM CTS" },
92	{ H3XXX_GPIO_COM_RTS,	GPIOF_OUT_INIT_LOW,	"COM RTS" },
93};
94
95static bool h3xxx_uart_request_gpios(void)
96{
97	static bool h3xxx_uart_gpio_ok;
98	int rc;
99
100	if (h3xxx_uart_gpio_ok)
101		return true;
102
103	rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio));
104	if (rc)
105		pr_err("h3xxx_uart_request_gpios: error %d\n", rc);
106	else
107		h3xxx_uart_gpio_ok = true;
108
109	return h3xxx_uart_gpio_ok;
110}
111
112static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
113{
114	if (port->mapbase == _Ser3UTCR0) {
115		if (!h3xxx_uart_request_gpios())
116			return;
117		gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
118	}
119}
120
121static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
122{
123	u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
124
125	if (port->mapbase == _Ser3UTCR0) {
126		if (!h3xxx_uart_request_gpios())
127			return ret;
128		/*
129		 * DCD and CTS bits are inverted in GPLR by RS232 transceiver
130		 */
131		if (gpio_get_value(H3XXX_GPIO_COM_DCD))
132			ret &= ~TIOCM_CD;
133		if (gpio_get_value(H3XXX_GPIO_COM_CTS))
134			ret &= ~TIOCM_CTS;
135	}
136
137	return ret;
138}
139
140static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
141{
142	if (port->mapbase == _Ser3UTCR0) {
143		if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
144			gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
145			gpio_free(H3XXX_EGPIO_RS232_ON);
146		} else {
147			pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
148				__func__);
149		}
150	}
151}
152
153/*
154 * Enable/Disable wake up events for this serial port.
155 * Obviously, we only support this on the normal COM port.
156 */
157static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
158{
159	int err = -EINVAL;
160
161	if (port->mapbase == _Ser3UTCR0) {
162		if (enable)
163			PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
164		else
165			PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
166		err = 0;
167	}
168	return err;
169}
170
171static struct sa1100_port_fns h3xxx_port_fns __initdata = {
172	.set_mctrl	= h3xxx_uart_set_mctrl,
173	.get_mctrl	= h3xxx_uart_get_mctrl,
174	.pm		= h3xxx_uart_pm,
175	.set_wake	= h3xxx_uart_set_wake,
176};
177
178/*
179 * EGPIO
180 */
181
182static struct resource egpio_resources[] = {
183	[0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
184};
185
186static struct htc_egpio_chip egpio_chips[] = {
187	[0] = {
188		.reg_start	= 0,
189		.gpio_base	= H3XXX_EGPIO_BASE,
190		.num_gpios	= 16,
191		.direction	= HTC_EGPIO_OUTPUT,
192		.initial_values	= 0x0080, /* H3XXX_EGPIO_RS232_ON */
193	},
194};
195
196static struct htc_egpio_platform_data egpio_info = {
197	.reg_width	= 16,
198	.bus_width	= 16,
199	.chip		= egpio_chips,
200	.num_chips	= ARRAY_SIZE(egpio_chips),
201};
202
203static struct platform_device h3xxx_egpio = {
204	.name		= "htc-egpio",
205	.id		= -1,
206	.resource	= egpio_resources,
207	.num_resources	= ARRAY_SIZE(egpio_resources),
208	.dev		= {
209		.platform_data = &egpio_info,
210	},
211};
212
213/*
214 * GPIO keys
215 */
216
217static struct gpio_keys_button h3xxx_button_table[] = {
218	{
219		.code		= KEY_POWER,
220		.gpio		= H3XXX_GPIO_PWR_BUTTON,
221		.desc		= "Power Button",
222		.active_low	= 1,
223		.type		= EV_KEY,
224		.wakeup		= 1,
225	}, {
226		.code		= KEY_ENTER,
227		.gpio		= H3XXX_GPIO_ACTION_BUTTON,
228		.active_low	= 1,
229		.desc		= "Action button",
230		.type		= EV_KEY,
231		.wakeup		= 0,
232	},
233};
234
235static struct gpio_keys_platform_data h3xxx_keys_data = {
236	.buttons  = h3xxx_button_table,
237	.nbuttons = ARRAY_SIZE(h3xxx_button_table),
238};
239
240static struct platform_device h3xxx_keys = {
241	.name	= "gpio-keys",
242	.id	= -1,
243	.dev	= {
244		.platform_data = &h3xxx_keys_data,
245	},
246};
247
248static struct resource h3xxx_micro_resources[] = {
249	DEFINE_RES_MEM(0x80010000, SZ_4K),
250	DEFINE_RES_MEM(0x80020000, SZ_4K),
251	DEFINE_RES_IRQ(IRQ_Ser1UART),
252};
253
254struct platform_device h3xxx_micro_asic = {
255	.name = "ipaq-h3xxx-micro",
256	.id = -1,
257	.resource = h3xxx_micro_resources,
258	.num_resources = ARRAY_SIZE(h3xxx_micro_resources),
259};
260
261static struct platform_device *h3xxx_devices[] = {
262	&h3xxx_egpio,
263	&h3xxx_keys,
264	&h3xxx_micro_asic,
265};
266
267void __init h3xxx_mach_init(void)
268{
269	sa1100_register_uart_fns(&h3xxx_port_fns);
270	sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
271	platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
272}
273
274static struct map_desc h3600_io_desc[] __initdata = {
275	{	/* static memory bank 2  CS#2 */
276		.virtual	=  H3600_BANK_2_VIRT,
277		.pfn		= __phys_to_pfn(SA1100_CS2_PHYS),
278		.length		= 0x02800000,
279		.type		= MT_DEVICE
280	}, {	/* static memory bank 4  CS#4 */
281		.virtual	=  H3600_BANK_4_VIRT,
282		.pfn		= __phys_to_pfn(SA1100_CS4_PHYS),
283		.length		= 0x00800000,
284		.type		= MT_DEVICE
285	}, {	/* EGPIO 0		CS#5 */
286		.virtual	=  H3600_EGPIO_VIRT,
287		.pfn		= __phys_to_pfn(H3600_EGPIO_PHYS),
288		.length		= 0x01000000,
289		.type		= MT_DEVICE
290	}
291};
292
293/*
294 * Common map_io initialization
295 */
296
297void __init h3xxx_map_io(void)
298{
299	sa1100_map_io();
300	iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
301
302	sa1100_register_uart(0, 3); /* Common serial port */
303//	sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
304
305	/* Ensure those pins are outputs and driving low  */
306	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
307	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
308
309	/* Configure suspend conditions */
310	PGSR = 0;
311	PCFR = PCFR_OPDE;
312	PSDR = 0;
313
314	GPCR = 0x0fffffff;	/* All outputs are set low by default */
315	GPDR = 0;		/* Configure all GPIOs as input */
316}
317
318