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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_device.h> |
21 | #include <linux/serial_core.h> |
22 | |
23 | #include <asm/mach/flash.h> |
24 | #include <asm/mach/map.h> |
25 | #include <asm/mach/serial_sa1100.h> |
26 | |
27 | #include <mach/h3xxx.h> |
28 | |
29 | #include "generic.h" |
30 | |
31 | void h3xxx_init_gpio(struct gpio_default_state *s, size_t n) |
32 | { |
33 | while (n--) { |
34 | const char *name = s->name; |
35 | int err; |
36 | |
37 | if (!name) |
38 | name = "[init]"; |
39 | err = gpio_request(s->gpio, name); |
40 | if (err) { |
41 | printk(KERN_ERR "gpio%u: unable to request: %d\n", |
42 | s->gpio, err); |
43 | continue; |
44 | } |
45 | if (s->mode >= 0) { |
46 | err = gpio_direction_output(s->gpio, s->mode); |
47 | } else { |
48 | err = gpio_direction_input(s->gpio); |
49 | } |
50 | if (err) { |
51 | printk(KERN_ERR "gpio%u: unable to set direction: %d\n", |
52 | s->gpio, err); |
53 | continue; |
54 | } |
55 | if (!s->name) |
56 | gpio_free(s->gpio); |
57 | s++; |
58 | } |
59 | } |
60 | |
61 | |
62 | /* |
63 | * H3xxx flash support |
64 | */ |
65 | static struct mtd_partition h3xxx_partitions[] = { |
66 | { |
67 | .name = "H3XXX boot firmware", |
68 | .size = 0x00040000, |
69 | .offset = 0, |
70 | .mask_flags = MTD_WRITEABLE, /* force read-only */ |
71 | }, { |
72 | .name = "H3XXX rootfs", |
73 | .size = MTDPART_SIZ_FULL, |
74 | .offset = 0x00040000, |
75 | } |
76 | }; |
77 | |
78 | static void h3xxx_set_vpp(int vpp) |
79 | { |
80 | gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp); |
81 | } |
82 | |
83 | static int h3xxx_flash_init(void) |
84 | { |
85 | int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp"); |
86 | if (err) { |
87 | pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__); |
88 | return err; |
89 | } |
90 | |
91 | err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0); |
92 | if (err) |
93 | gpio_free(H3XXX_EGPIO_VPP_ON); |
94 | |
95 | return err; |
96 | } |
97 | |
98 | static void h3xxx_flash_exit(void) |
99 | { |
100 | gpio_free(H3XXX_EGPIO_VPP_ON); |
101 | } |
102 | |
103 | static struct flash_platform_data h3xxx_flash_data = { |
104 | .map_name = "cfi_probe", |
105 | .set_vpp = h3xxx_set_vpp, |
106 | .init = h3xxx_flash_init, |
107 | .exit = h3xxx_flash_exit, |
108 | .parts = h3xxx_partitions, |
109 | .nr_parts = ARRAY_SIZE(h3xxx_partitions), |
110 | }; |
111 | |
112 | static struct resource h3xxx_flash_resource = { |
113 | .start = SA1100_CS0_PHYS, |
114 | .end = SA1100_CS0_PHYS + SZ_32M - 1, |
115 | .flags = IORESOURCE_MEM, |
116 | }; |
117 | |
118 | |
119 | /* |
120 | * H3xxx uart support |
121 | */ |
122 | static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl) |
123 | { |
124 | if (port->mapbase == _Ser3UTCR0) { |
125 | gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS)); |
126 | } |
127 | } |
128 | |
129 | static u_int h3xxx_uart_get_mctrl(struct uart_port *port) |
130 | { |
131 | u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; |
132 | |
133 | if (port->mapbase == _Ser3UTCR0) { |
134 | /* |
135 | * DCD and CTS bits are inverted in GPLR by RS232 transceiver |
136 | */ |
137 | if (gpio_get_value(H3XXX_GPIO_COM_DCD)) |
138 | ret &= ~TIOCM_CD; |
139 | if (gpio_get_value(H3XXX_GPIO_COM_CTS)) |
140 | ret &= ~TIOCM_CTS; |
141 | } |
142 | |
143 | return ret; |
144 | } |
145 | |
146 | static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate) |
147 | { |
148 | if (port->mapbase == _Ser3UTCR0) { |
149 | if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) { |
150 | gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state); |
151 | gpio_free(H3XXX_EGPIO_RS232_ON); |
152 | } else { |
153 | pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n", |
154 | __func__); |
155 | } |
156 | } |
157 | } |
158 | |
159 | /* |
160 | * Enable/Disable wake up events for this serial port. |
161 | * Obviously, we only support this on the normal COM port. |
162 | */ |
163 | static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable) |
164 | { |
165 | int err = -EINVAL; |
166 | |
167 | if (port->mapbase == _Ser3UTCR0) { |
168 | if (enable) |
169 | PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */ |
170 | else |
171 | PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */ |
172 | err = 0; |
173 | } |
174 | return err; |
175 | } |
176 | |
177 | static struct sa1100_port_fns h3xxx_port_fns __initdata = { |
178 | .set_mctrl = h3xxx_uart_set_mctrl, |
179 | .get_mctrl = h3xxx_uart_get_mctrl, |
180 | .pm = h3xxx_uart_pm, |
181 | .set_wake = h3xxx_uart_set_wake, |
182 | }; |
183 | |
184 | /* |
185 | * EGPIO |
186 | */ |
187 | |
188 | static struct resource egpio_resources[] = { |
189 | [0] = { |
190 | .start = H3600_EGPIO_PHYS, |
191 | .end = H3600_EGPIO_PHYS + 0x4 - 1, |
192 | .flags = IORESOURCE_MEM, |
193 | }, |
194 | }; |
195 | |
196 | static struct htc_egpio_chip egpio_chips[] = { |
197 | [0] = { |
198 | .reg_start = 0, |
199 | .gpio_base = H3XXX_EGPIO_BASE, |
200 | .num_gpios = 16, |
201 | .direction = HTC_EGPIO_OUTPUT, |
202 | .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */ |
203 | }, |
204 | }; |
205 | |
206 | static struct htc_egpio_platform_data egpio_info = { |
207 | .reg_width = 16, |
208 | .bus_width = 16, |
209 | .chip = egpio_chips, |
210 | .num_chips = ARRAY_SIZE(egpio_chips), |
211 | }; |
212 | |
213 | static struct platform_device h3xxx_egpio = { |
214 | .name = "htc-egpio", |
215 | .id = -1, |
216 | .resource = egpio_resources, |
217 | .num_resources = ARRAY_SIZE(egpio_resources), |
218 | .dev = { |
219 | .platform_data = &egpio_info, |
220 | }, |
221 | }; |
222 | |
223 | /* |
224 | * GPIO keys |
225 | */ |
226 | |
227 | static struct gpio_keys_button h3xxx_button_table[] = { |
228 | { |
229 | .code = KEY_POWER, |
230 | .gpio = H3XXX_GPIO_PWR_BUTTON, |
231 | .desc = "Power Button", |
232 | .active_low = 1, |
233 | .type = EV_KEY, |
234 | .wakeup = 1, |
235 | }, { |
236 | .code = KEY_ENTER, |
237 | .gpio = H3XXX_GPIO_ACTION_BUTTON, |
238 | .active_low = 1, |
239 | .desc = "Action button", |
240 | .type = EV_KEY, |
241 | .wakeup = 0, |
242 | }, |
243 | }; |
244 | |
245 | static struct gpio_keys_platform_data h3xxx_keys_data = { |
246 | .buttons = h3xxx_button_table, |
247 | .nbuttons = ARRAY_SIZE(h3xxx_button_table), |
248 | }; |
249 | |
250 | static struct platform_device h3xxx_keys = { |
251 | .name = "gpio-keys", |
252 | .id = -1, |
253 | .dev = { |
254 | .platform_data = &h3xxx_keys_data, |
255 | }, |
256 | }; |
257 | |
258 | static struct platform_device *h3xxx_devices[] = { |
259 | &h3xxx_egpio, |
260 | &h3xxx_keys, |
261 | }; |
262 | |
263 | void __init h3xxx_mach_init(void) |
264 | { |
265 | sa1100_register_uart_fns(&h3xxx_port_fns); |
266 | sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1); |
267 | platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices)); |
268 | } |
269 | |
270 | static struct map_desc h3600_io_desc[] __initdata = { |
271 | { /* static memory bank 2 CS#2 */ |
272 | .virtual = H3600_BANK_2_VIRT, |
273 | .pfn = __phys_to_pfn(SA1100_CS2_PHYS), |
274 | .length = 0x02800000, |
275 | .type = MT_DEVICE |
276 | }, { /* static memory bank 4 CS#4 */ |
277 | .virtual = H3600_BANK_4_VIRT, |
278 | .pfn = __phys_to_pfn(SA1100_CS4_PHYS), |
279 | .length = 0x00800000, |
280 | .type = MT_DEVICE |
281 | }, { /* EGPIO 0 CS#5 */ |
282 | .virtual = H3600_EGPIO_VIRT, |
283 | .pfn = __phys_to_pfn(H3600_EGPIO_PHYS), |
284 | .length = 0x01000000, |
285 | .type = MT_DEVICE |
286 | } |
287 | }; |
288 | |
289 | /* |
290 | * Common map_io initialization |
291 | */ |
292 | |
293 | void __init h3xxx_map_io(void) |
294 | { |
295 | sa1100_map_io(); |
296 | iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc)); |
297 | |
298 | sa1100_register_uart(0, 3); /* Common serial port */ |
299 | // sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */ |
300 | |
301 | /* Ensure those pins are outputs and driving low */ |
302 | PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; |
303 | PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); |
304 | |
305 | /* Configure suspend conditions */ |
306 | PGSR = 0; |
307 | PCFR = PCFR_OPDE; |
308 | PSDR = 0; |
309 | |
310 | GPCR = 0x0fffffff; /* All outputs are set low by default */ |
311 | GPDR = 0; /* Configure all GPIOs as input */ |
312 | } |
313 | |
314 |
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