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