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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  */
35 static 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 
h3xxx_set_vpp(int vpp)48 static void h3xxx_set_vpp(int vpp)
49 {
50 	gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
51 }
52 
h3xxx_flash_init(void)53 static 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 
h3xxx_flash_exit(void)68 static void h3xxx_flash_exit(void)
69 {
70 	gpio_free(H3XXX_EGPIO_VPP_ON);
71 }
72 
73 static 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 
82 static struct resource h3xxx_flash_resource =
83 	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
84 
85 
86 /*
87  * H3xxx uart support
88  */
89 static 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 
h3xxx_uart_request_gpios(void)95 static 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 
h3xxx_uart_set_mctrl(struct uart_port * port,u_int mctrl)112 static 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 
h3xxx_uart_get_mctrl(struct uart_port * port)121 static 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 
h3xxx_uart_pm(struct uart_port * port,u_int state,u_int oldstate)140 static 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  */
h3xxx_uart_set_wake(struct uart_port * port,u_int enable)157 static 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 
171 static 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 
182 static struct resource egpio_resources[] = {
183 	[0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
184 };
185 
186 static 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 
196 static 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 
203 static 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 
217 static 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 
235 static struct gpio_keys_platform_data h3xxx_keys_data = {
236 	.buttons  = h3xxx_button_table,
237 	.nbuttons = ARRAY_SIZE(h3xxx_button_table),
238 };
239 
240 static struct platform_device h3xxx_keys = {
241 	.name	= "gpio-keys",
242 	.id	= -1,
243 	.dev	= {
244 		.platform_data = &h3xxx_keys_data,
245 	},
246 };
247 
248 static 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 
254 struct 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 
261 static struct platform_device *h3xxx_devices[] = {
262 	&h3xxx_egpio,
263 	&h3xxx_keys,
264 	&h3xxx_micro_asic,
265 };
266 
h3xxx_mach_init(void)267 void __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 
274 static 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 
h3xxx_map_io(void)297 void __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