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/machine.h>
15 #include <linux/gpio.h>
16 #include <linux/gpio_keys.h>
17 #include <linux/input.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/partitions.h>
20 #include <linux/platform_data/gpio-htc-egpio.h>
21 #include <linux/platform_data/sa11x0-serial.h>
22 #include <linux/platform_device.h>
23 #include <linux/serial_core.h>
24
25 #include <asm/mach/flash.h>
26 #include <asm/mach/map.h>
27
28 #include <mach/h3xxx.h>
29 #include <mach/irqs.h>
30
31 #include "generic.h"
32
33 /*
34 * H3xxx flash support
35 */
36 static struct mtd_partition h3xxx_partitions[] = {
37 {
38 .name = "H3XXX boot firmware",
39 .size = 0x00040000,
40 .offset = 0,
41 .mask_flags = MTD_WRITEABLE, /* force read-only */
42 }, {
43 .name = "H3XXX rootfs",
44 .size = MTDPART_SIZ_FULL,
45 .offset = 0x00040000,
46 }
47 };
48
h3xxx_set_vpp(int vpp)49 static void h3xxx_set_vpp(int vpp)
50 {
51 gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
52 }
53
h3xxx_flash_init(void)54 static int h3xxx_flash_init(void)
55 {
56 int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
57 if (err) {
58 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__);
59 return err;
60 }
61
62 err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
63 if (err)
64 gpio_free(H3XXX_EGPIO_VPP_ON);
65
66 return err;
67 }
68
h3xxx_flash_exit(void)69 static void h3xxx_flash_exit(void)
70 {
71 gpio_free(H3XXX_EGPIO_VPP_ON);
72 }
73
74 static struct flash_platform_data h3xxx_flash_data = {
75 .map_name = "cfi_probe",
76 .set_vpp = h3xxx_set_vpp,
77 .init = h3xxx_flash_init,
78 .exit = h3xxx_flash_exit,
79 .parts = h3xxx_partitions,
80 .nr_parts = ARRAY_SIZE(h3xxx_partitions),
81 };
82
83 static struct resource h3xxx_flash_resource =
84 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
85
86
87 /*
88 * H3xxx uart support
89 */
90 static struct gpio h3xxx_uart_gpio[] = {
91 { H3XXX_GPIO_COM_DCD, GPIOF_IN, "COM DCD" },
92 { H3XXX_GPIO_COM_CTS, GPIOF_IN, "COM CTS" },
93 { H3XXX_GPIO_COM_RTS, GPIOF_OUT_INIT_LOW, "COM RTS" },
94 };
95
h3xxx_uart_request_gpios(void)96 static bool h3xxx_uart_request_gpios(void)
97 {
98 static bool h3xxx_uart_gpio_ok;
99 int rc;
100
101 if (h3xxx_uart_gpio_ok)
102 return true;
103
104 rc = gpio_request_array(h3xxx_uart_gpio, ARRAY_SIZE(h3xxx_uart_gpio));
105 if (rc)
106 pr_err("h3xxx_uart_request_gpios: error %d\n", rc);
107 else
108 h3xxx_uart_gpio_ok = true;
109
110 return h3xxx_uart_gpio_ok;
111 }
112
h3xxx_uart_set_mctrl(struct uart_port * port,u_int mctrl)113 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
114 {
115 if (port->mapbase == _Ser3UTCR0) {
116 if (!h3xxx_uart_request_gpios())
117 return;
118 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
119 }
120 }
121
h3xxx_uart_get_mctrl(struct uart_port * port)122 static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
123 {
124 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
125
126 if (port->mapbase == _Ser3UTCR0) {
127 if (!h3xxx_uart_request_gpios())
128 return ret;
129 /*
130 * DCD and CTS bits are inverted in GPLR by RS232 transceiver
131 */
132 if (gpio_get_value(H3XXX_GPIO_COM_DCD))
133 ret &= ~TIOCM_CD;
134 if (gpio_get_value(H3XXX_GPIO_COM_CTS))
135 ret &= ~TIOCM_CTS;
136 }
137
138 return ret;
139 }
140
h3xxx_uart_pm(struct uart_port * port,u_int state,u_int oldstate)141 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
142 {
143 if (port->mapbase == _Ser3UTCR0) {
144 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
145 gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
146 gpio_free(H3XXX_EGPIO_RS232_ON);
147 } else {
148 pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n",
149 __func__);
150 }
151 }
152 }
153
154 /*
155 * Enable/Disable wake up events for this serial port.
156 * Obviously, we only support this on the normal COM port.
157 */
h3xxx_uart_set_wake(struct uart_port * port,u_int enable)158 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
159 {
160 int err = -EINVAL;
161
162 if (port->mapbase == _Ser3UTCR0) {
163 if (enable)
164 PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
165 else
166 PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
167 err = 0;
168 }
169 return err;
170 }
171
172 static struct sa1100_port_fns h3xxx_port_fns __initdata = {
173 .set_mctrl = h3xxx_uart_set_mctrl,
174 .get_mctrl = h3xxx_uart_get_mctrl,
175 .pm = h3xxx_uart_pm,
176 .set_wake = h3xxx_uart_set_wake,
177 };
178
179 /*
180 * EGPIO
181 */
182
183 static struct resource egpio_resources[] = {
184 [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4),
185 };
186
187 static struct htc_egpio_chip egpio_chips[] = {
188 [0] = {
189 .reg_start = 0,
190 .gpio_base = H3XXX_EGPIO_BASE,
191 .num_gpios = 16,
192 .direction = HTC_EGPIO_OUTPUT,
193 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */
194 },
195 };
196
197 static struct htc_egpio_platform_data egpio_info = {
198 .reg_width = 16,
199 .bus_width = 16,
200 .chip = egpio_chips,
201 .num_chips = ARRAY_SIZE(egpio_chips),
202 };
203
204 static struct platform_device h3xxx_egpio = {
205 .name = "htc-egpio",
206 .id = -1,
207 .resource = egpio_resources,
208 .num_resources = ARRAY_SIZE(egpio_resources),
209 .dev = {
210 .platform_data = &egpio_info,
211 },
212 };
213
214 /*
215 * GPIO keys
216 */
217
218 static struct gpio_keys_button h3xxx_button_table[] = {
219 {
220 .code = KEY_POWER,
221 .gpio = H3XXX_GPIO_PWR_BUTTON,
222 .desc = "Power Button",
223 .active_low = 1,
224 .type = EV_KEY,
225 .wakeup = 1,
226 }, {
227 .code = KEY_ENTER,
228 .gpio = H3XXX_GPIO_ACTION_BUTTON,
229 .active_low = 1,
230 .desc = "Action button",
231 .type = EV_KEY,
232 .wakeup = 0,
233 },
234 };
235
236 static struct gpio_keys_platform_data h3xxx_keys_data = {
237 .buttons = h3xxx_button_table,
238 .nbuttons = ARRAY_SIZE(h3xxx_button_table),
239 };
240
241 static struct platform_device h3xxx_keys = {
242 .name = "gpio-keys",
243 .id = -1,
244 .dev = {
245 .platform_data = &h3xxx_keys_data,
246 },
247 };
248
249 static struct resource h3xxx_micro_resources[] = {
250 DEFINE_RES_MEM(0x80010000, SZ_4K),
251 DEFINE_RES_MEM(0x80020000, SZ_4K),
252 DEFINE_RES_IRQ(IRQ_Ser1UART),
253 };
254
255 struct platform_device h3xxx_micro_asic = {
256 .name = "ipaq-h3xxx-micro",
257 .id = -1,
258 .resource = h3xxx_micro_resources,
259 .num_resources = ARRAY_SIZE(h3xxx_micro_resources),
260 };
261
262 static struct platform_device *h3xxx_devices[] = {
263 &h3xxx_egpio,
264 &h3xxx_keys,
265 &h3xxx_micro_asic,
266 };
267
268 static struct gpiod_lookup_table h3xxx_pcmcia_gpio_table = {
269 .dev_id = "sa11x0-pcmcia",
270 .table = {
271 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD0,
272 "pcmcia0-detect", GPIO_ACTIVE_LOW),
273 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ0,
274 "pcmcia0-ready", GPIO_ACTIVE_HIGH),
275 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_CD1,
276 "pcmcia1-detect", GPIO_ACTIVE_LOW),
277 GPIO_LOOKUP("gpio", H3XXX_GPIO_PCMCIA_IRQ1,
278 "pcmcia1-ready", GPIO_ACTIVE_HIGH),
279 { },
280 },
281 };
282
h3xxx_mach_init(void)283 void __init h3xxx_mach_init(void)
284 {
285 gpiod_add_lookup_table(&h3xxx_pcmcia_gpio_table);
286 sa1100_register_uart_fns(&h3xxx_port_fns);
287 sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
288 platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
289 }
290
291 static struct map_desc h3600_io_desc[] __initdata = {
292 { /* static memory bank 2 CS#2 */
293 .virtual = H3600_BANK_2_VIRT,
294 .pfn = __phys_to_pfn(SA1100_CS2_PHYS),
295 .length = 0x02800000,
296 .type = MT_DEVICE
297 }, { /* static memory bank 4 CS#4 */
298 .virtual = H3600_BANK_4_VIRT,
299 .pfn = __phys_to_pfn(SA1100_CS4_PHYS),
300 .length = 0x00800000,
301 .type = MT_DEVICE
302 }, { /* EGPIO 0 CS#5 */
303 .virtual = H3600_EGPIO_VIRT,
304 .pfn = __phys_to_pfn(H3600_EGPIO_PHYS),
305 .length = 0x01000000,
306 .type = MT_DEVICE
307 }
308 };
309
310 /*
311 * Common map_io initialization
312 */
313
h3xxx_map_io(void)314 void __init h3xxx_map_io(void)
315 {
316 sa1100_map_io();
317 iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));
318
319 sa1100_register_uart(0, 3); /* Common serial port */
320 // sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */
321
322 /* Ensure those pins are outputs and driving low */
323 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
324 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
325
326 /* Configure suspend conditions */
327 PGSR = 0;
328 PCFR = PCFR_OPDE;
329 PSDR = 0;
330
331 GPCR = 0x0fffffff; /* All outputs are set low by default */
332 GPDR = 0; /* Configure all GPIOs as input */
333 }
334
335
