xref: /openbmc/linux/arch/arm/mach-sa1100/h3xxx.c (revision f7018c21)
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 
29 #include "generic.h"
30 
31 /*
32  * H3xxx flash support
33  */
34 static struct mtd_partition h3xxx_partitions[] = {
35 	{
36 		.name		= "H3XXX boot firmware",
37 		.size		= 0x00040000,
38 		.offset		= 0,
39 		.mask_flags	= MTD_WRITEABLE,  /* force read-only */
40 	}, {
41 		.name		= "H3XXX rootfs",
42 		.size		= MTDPART_SIZ_FULL,
43 		.offset		= 0x00040000,
44 	}
45 };
46 
47 static void h3xxx_set_vpp(int vpp)
48 {
49 	gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
50 }
51 
52 static int h3xxx_flash_init(void)
53 {
54 	int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
55 	if (err) {
56 		pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
57 		return err;
58 	}
59 
60 	err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
61 	if (err)
62 		gpio_free(H3XXX_EGPIO_VPP_ON);
63 
64 	return err;
65 }
66 
67 static void h3xxx_flash_exit(void)
68 {
69 	gpio_free(H3XXX_EGPIO_VPP_ON);
70 }
71 
72 static struct flash_platform_data h3xxx_flash_data = {
73 	.map_name	= "cfi_probe",
74 	.set_vpp	= h3xxx_set_vpp,
75 	.init		= h3xxx_flash_init,
76 	.exit		= h3xxx_flash_exit,
77 	.parts		= h3xxx_partitions,
78 	.nr_parts	= ARRAY_SIZE(h3xxx_partitions),
79 };
80 
81 static struct resource h3xxx_flash_resource =
82 	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
83 
84 
85 /*
86  * H3xxx uart support
87  */
88 static struct gpio h3xxx_uart_gpio[] = {
89 	{ H3XXX_GPIO_COM_DCD,	GPIOF_IN,		"COM DCD" },
90 	{ H3XXX_GPIO_COM_CTS,	GPIOF_IN,		"COM CTS" },
91 	{ H3XXX_GPIO_COM_RTS,	GPIOF_OUT_INIT_LOW,	"COM RTS" },
92 };
93 
94 static bool h3xxx_uart_request_gpios(void)
95 {
96 	static bool h3xxx_uart_gpio_ok;
97 	int rc;
98 
99 	if (h3xxx_uart_gpio_ok)
100 		return true;
101 
102 	rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio));
103 	if (rc)
104 		pr_err("h3xxx_uart_request_gpios: error %d\n", rc);
105 	else
106 		h3xxx_uart_gpio_ok = true;
107 
108 	return h3xxx_uart_gpio_ok;
109 }
110 
111 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
112 {
113 	if (port->mapbase == _Ser3UTCR0) {
114 		if (!h3xxx_uart_request_gpios())
115 			return;
116 		gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
117 	}
118 }
119 
120 static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
121 {
122 	u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
123 
124 	if (port->mapbase == _Ser3UTCR0) {
125 		if (!h3xxx_uart_request_gpios())
126 			return ret;
127 		/*
128 		 * DCD and CTS bits are inverted in GPLR by RS232 transceiver
129 		 */
130 		if (gpio_get_value(H3XXX_GPIO_COM_DCD))
131 			ret &= ~TIOCM_CD;
132 		if (gpio_get_value(H3XXX_GPIO_COM_CTS))
133 			ret &= ~TIOCM_CTS;
134 	}
135 
136 	return ret;
137 }
138 
139 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
140 {
141 	if (port->mapbase == _Ser3UTCR0) {
142 		if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
143 			gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
144 			gpio_free(H3XXX_EGPIO_RS232_ON);
145 		} else {
146 			pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
147 				__func__);
148 		}
149 	}
150 }
151 
152 /*
153  * Enable/Disable wake up events for this serial port.
154  * Obviously, we only support this on the normal COM port.
155  */
156 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
157 {
158 	int err = -EINVAL;
159 
160 	if (port->mapbase == _Ser3UTCR0) {
161 		if (enable)
162 			PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
163 		else
164 			PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
165 		err = 0;
166 	}
167 	return err;
168 }
169 
170 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
171 	.set_mctrl	= h3xxx_uart_set_mctrl,
172 	.get_mctrl	= h3xxx_uart_get_mctrl,
173 	.pm		= h3xxx_uart_pm,
174 	.set_wake	= h3xxx_uart_set_wake,
175 };
176 
177 /*
178  * EGPIO
179  */
180 
181 static struct resource egpio_resources[] = {
182 	[0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
183 };
184 
185 static struct htc_egpio_chip egpio_chips[] = {
186 	[0] = {
187 		.reg_start	= 0,
188 		.gpio_base	= H3XXX_EGPIO_BASE,
189 		.num_gpios	= 16,
190 		.direction	= HTC_EGPIO_OUTPUT,
191 		.initial_values	= 0x0080, /* H3XXX_EGPIO_RS232_ON */
192 	},
193 };
194 
195 static struct htc_egpio_platform_data egpio_info = {
196 	.reg_width	= 16,
197 	.bus_width	= 16,
198 	.chip		= egpio_chips,
199 	.num_chips	= ARRAY_SIZE(egpio_chips),
200 };
201 
202 static struct platform_device h3xxx_egpio = {
203 	.name		= "htc-egpio",
204 	.id		= -1,
205 	.resource	= egpio_resources,
206 	.num_resources	= ARRAY_SIZE(egpio_resources),
207 	.dev		= {
208 		.platform_data = &egpio_info,
209 	},
210 };
211 
212 /*
213  * GPIO keys
214  */
215 
216 static struct gpio_keys_button h3xxx_button_table[] = {
217 	{
218 		.code		= KEY_POWER,
219 		.gpio		= H3XXX_GPIO_PWR_BUTTON,
220 		.desc		= "Power Button",
221 		.active_low	= 1,
222 		.type		= EV_KEY,
223 		.wakeup		= 1,
224 	}, {
225 		.code		= KEY_ENTER,
226 		.gpio		= H3XXX_GPIO_ACTION_BUTTON,
227 		.active_low	= 1,
228 		.desc		= "Action button",
229 		.type		= EV_KEY,
230 		.wakeup		= 0,
231 	},
232 };
233 
234 static struct gpio_keys_platform_data h3xxx_keys_data = {
235 	.buttons  = h3xxx_button_table,
236 	.nbuttons = ARRAY_SIZE(h3xxx_button_table),
237 };
238 
239 static struct platform_device h3xxx_keys = {
240 	.name	= "gpio-keys",
241 	.id	= -1,
242 	.dev	= {
243 		.platform_data = &h3xxx_keys_data,
244 	},
245 };
246 
247 static struct platform_device *h3xxx_devices[] = {
248 	&h3xxx_egpio,
249 	&h3xxx_keys,
250 };
251 
252 void __init h3xxx_mach_init(void)
253 {
254 	sa1100_register_uart_fns(&h3xxx_port_fns);
255 	sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
256 	platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
257 }
258 
259 static struct map_desc h3600_io_desc[] __initdata = {
260 	{	/* static memory bank 2  CS#2 */
261 		.virtual	=  H3600_BANK_2_VIRT,
262 		.pfn		= __phys_to_pfn(SA1100_CS2_PHYS),
263 		.length		= 0x02800000,
264 		.type		= MT_DEVICE
265 	}, {	/* static memory bank 4  CS#4 */
266 		.virtual	=  H3600_BANK_4_VIRT,
267 		.pfn		= __phys_to_pfn(SA1100_CS4_PHYS),
268 		.length		= 0x00800000,
269 		.type		= MT_DEVICE
270 	}, {	/* EGPIO 0		CS#5 */
271 		.virtual	=  H3600_EGPIO_VIRT,
272 		.pfn		= __phys_to_pfn(H3600_EGPIO_PHYS),
273 		.length		= 0x01000000,
274 		.type		= MT_DEVICE
275 	}
276 };
277 
278 /*
279  * Common map_io initialization
280  */
281 
282 void __init h3xxx_map_io(void)
283 {
284 	sa1100_map_io();
285 	iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
286 
287 	sa1100_register_uart(0, 3); /* Common serial port */
288 //	sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
289 
290 	/* Ensure those pins are outputs and driving low  */
291 	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
292 	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
293 
294 	/* Configure suspend conditions */
295 	PGSR = 0;
296 	PCFR = PCFR_OPDE;
297 	PSDR = 0;
298 
299 	GPCR = 0x0fffffff;	/* All outputs are set low by default */
300 	GPDR = 0;		/* Configure all GPIOs as input */
301 }
302 
303