1 /*
2 * linux/arch/arm/mach-sa1100/simpad.c
3 */
4
5 #include <linux/module.h>
6 #include <linux/init.h>
7 #include <linux/kernel.h>
8 #include <linux/tty.h>
9 #include <linux/proc_fs.h>
10 #include <linux/string.h>
11 #include <linux/pm.h>
12 #include <linux/platform_device.h>
13 #include <linux/mtd/mtd.h>
14 #include <linux/mtd/partitions.h>
15 #include <linux/io.h>
16 #include <linux/gpio.h>
17
18 #include <asm/irq.h>
19 #include <mach/hardware.h>
20 #include <asm/setup.h>
21
22 #include <asm/mach-types.h>
23 #include <asm/mach/arch.h>
24 #include <asm/mach/flash.h>
25 #include <asm/mach/map.h>
26 #include <asm/mach/serial_sa1100.h>
27 #include <mach/mcp.h>
28 #include <mach/simpad.h>
29
30 #include <linux/serial_core.h>
31 #include <linux/ioport.h>
32 #include <linux/input.h>
33 #include <linux/gpio_keys.h>
34 #include <linux/leds.h>
35 #include <linux/i2c-gpio.h>
36
37 #include "generic.h"
38
39 /*
40 * CS3 support
41 */
42
43 static long cs3_shadow;
44 static spinlock_t cs3_lock;
45 static struct gpio_chip cs3_gpio;
46
simpad_get_cs3_ro(void)47 long simpad_get_cs3_ro(void)
48 {
49 return readl(CS3_BASE);
50 }
51 EXPORT_SYMBOL(simpad_get_cs3_ro);
52
simpad_get_cs3_shadow(void)53 long simpad_get_cs3_shadow(void)
54 {
55 return cs3_shadow;
56 }
57 EXPORT_SYMBOL(simpad_get_cs3_shadow);
58
__simpad_write_cs3(void)59 static void __simpad_write_cs3(void)
60 {
61 writel(cs3_shadow, CS3_BASE);
62 }
63
simpad_set_cs3_bit(int value)64 void simpad_set_cs3_bit(int value)
65 {
66 unsigned long flags;
67
68 spin_lock_irqsave(&cs3_lock, flags);
69 cs3_shadow |= value;
70 __simpad_write_cs3();
71 spin_unlock_irqrestore(&cs3_lock, flags);
72 }
73 EXPORT_SYMBOL(simpad_set_cs3_bit);
74
simpad_clear_cs3_bit(int value)75 void simpad_clear_cs3_bit(int value)
76 {
77 unsigned long flags;
78
79 spin_lock_irqsave(&cs3_lock, flags);
80 cs3_shadow &= ~value;
81 __simpad_write_cs3();
82 spin_unlock_irqrestore(&cs3_lock, flags);
83 }
84 EXPORT_SYMBOL(simpad_clear_cs3_bit);
85
cs3_gpio_set(struct gpio_chip * chip,unsigned offset,int value)86 static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
87 {
88 if (offset > 15)
89 return;
90 if (value)
91 simpad_set_cs3_bit(1 << offset);
92 else
93 simpad_clear_cs3_bit(1 << offset);
94 };
95
cs3_gpio_get(struct gpio_chip * chip,unsigned offset)96 static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
97 {
98 if (offset > 15)
99 return simpad_get_cs3_ro() & (1 << (offset - 16));
100 return simpad_get_cs3_shadow() & (1 << offset);
101 };
102
cs3_gpio_direction_input(struct gpio_chip * chip,unsigned offset)103 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
104 {
105 if (offset > 15)
106 return 0;
107 return -EINVAL;
108 };
109
cs3_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)110 static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
111 int value)
112 {
113 if (offset > 15)
114 return -EINVAL;
115 cs3_gpio_set(chip, offset, value);
116 return 0;
117 };
118
119 static struct map_desc simpad_io_desc[] __initdata = {
120 { /* MQ200 */
121 .virtual = 0xf2800000,
122 .pfn = __phys_to_pfn(0x4b800000),
123 .length = 0x00800000,
124 .type = MT_DEVICE
125 }, { /* Simpad CS3 */
126 .virtual = CS3_BASE,
127 .pfn = __phys_to_pfn(SA1100_CS3_PHYS),
128 .length = 0x00100000,
129 .type = MT_DEVICE
130 },
131 };
132
133
simpad_uart_pm(struct uart_port * port,u_int state,u_int oldstate)134 static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
135 {
136 if (port->mapbase == (u_int)&Ser1UTCR0) {
137 if (state)
138 {
139 simpad_clear_cs3_bit(RS232_ON);
140 simpad_clear_cs3_bit(DECT_POWER_ON);
141 }else
142 {
143 simpad_set_cs3_bit(RS232_ON);
144 simpad_set_cs3_bit(DECT_POWER_ON);
145 }
146 }
147 }
148
149 static struct sa1100_port_fns simpad_port_fns __initdata = {
150 .pm = simpad_uart_pm,
151 };
152
153
154 static struct mtd_partition simpad_partitions[] = {
155 {
156 .name = "SIMpad boot firmware",
157 .size = 0x00080000,
158 .offset = 0,
159 .mask_flags = MTD_WRITEABLE,
160 }, {
161 .name = "SIMpad kernel",
162 .size = 0x0010000,
163 .offset = MTDPART_OFS_APPEND,
164 }, {
165 .name = "SIMpad root jffs2",
166 .size = MTDPART_SIZ_FULL,
167 .offset = MTDPART_OFS_APPEND,
168 }
169 };
170
171 static struct flash_platform_data simpad_flash_data = {
172 .map_name = "cfi_probe",
173 .parts = simpad_partitions,
174 .nr_parts = ARRAY_SIZE(simpad_partitions),
175 };
176
177
178 static struct resource simpad_flash_resources [] = {
179 {
180 .start = SA1100_CS0_PHYS,
181 .end = SA1100_CS0_PHYS + SZ_16M -1,
182 .flags = IORESOURCE_MEM,
183 }, {
184 .start = SA1100_CS1_PHYS,
185 .end = SA1100_CS1_PHYS + SZ_16M -1,
186 .flags = IORESOURCE_MEM,
187 }
188 };
189
190 static struct mcp_plat_data simpad_mcp_data = {
191 .mccr0 = MCCR0_ADM,
192 .sclk_rate = 11981000,
193 .gpio_base = SIMPAD_UCB1X00_GPIO_BASE,
194 };
195
196
197
simpad_map_io(void)198 static void __init simpad_map_io(void)
199 {
200 sa1100_map_io();
201
202 iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
203
204 /* Initialize CS3 */
205 cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
206 RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
207 __simpad_write_cs3(); /* Spinlocks not yet initialized */
208
209 sa1100_register_uart_fns(&simpad_port_fns);
210 sa1100_register_uart(0, 3); /* serial interface */
211 sa1100_register_uart(1, 1); /* DECT */
212
213 // Reassign UART 1 pins
214 GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
215 GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
216 GPDR &= ~GPIO_UART_RXD;
217 PPAR |= PPAR_UPR;
218
219 /*
220 * Set up registers for sleep mode.
221 */
222
223
224 PWER = PWER_GPIO0| PWER_RTC;
225 PGSR = 0x818;
226 PCFR = 0;
227 PSDR = 0;
228
229 }
230
simpad_power_off(void)231 static void simpad_power_off(void)
232 {
233 local_irq_disable();
234 cs3_shadow = SD_MEDIAQ;
235 __simpad_write_cs3(); /* Bypass spinlock here */
236
237 /* disable internal oscillator, float CS lines */
238 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
239 /* enable wake-up on GPIO0 */
240 PWER = GFER = GRER = PWER_GPIO0;
241 /*
242 * set scratchpad to zero, just in case it is used as a
243 * restart address by the bootloader.
244 */
245 PSPR = 0;
246 PGSR = 0;
247 /* enter sleep mode */
248 PMCR = PMCR_SF;
249 while(1);
250
251 local_irq_enable(); /* we won't ever call it */
252
253
254 }
255
256 /*
257 * gpio_keys
258 */
259
260 static struct gpio_keys_button simpad_button_table[] = {
261 { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
262 };
263
264 static struct gpio_keys_platform_data simpad_keys_data = {
265 .buttons = simpad_button_table,
266 .nbuttons = ARRAY_SIZE(simpad_button_table),
267 };
268
269 static struct platform_device simpad_keys = {
270 .name = "gpio-keys",
271 .dev = {
272 .platform_data = &simpad_keys_data,
273 },
274 };
275
276 static struct gpio_keys_button simpad_polled_button_table[] = {
277 { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
278 { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
279 { KEY_UP, SIMPAD_UCB1X00_GPIO_UP, 1, "up button" },
280 { KEY_DOWN, SIMPAD_UCB1X00_GPIO_DOWN, 1, "down button" },
281 { KEY_LEFT, SIMPAD_UCB1X00_GPIO_LEFT, 1, "left button" },
282 { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
283 };
284
285 static struct gpio_keys_platform_data simpad_polled_keys_data = {
286 .buttons = simpad_polled_button_table,
287 .nbuttons = ARRAY_SIZE(simpad_polled_button_table),
288 .poll_interval = 50,
289 };
290
291 static struct platform_device simpad_polled_keys = {
292 .name = "gpio-keys-polled",
293 .dev = {
294 .platform_data = &simpad_polled_keys_data,
295 },
296 };
297
298 /*
299 * GPIO LEDs
300 */
301
302 static struct gpio_led simpad_leds[] = {
303 {
304 .name = "simpad:power",
305 .gpio = SIMPAD_CS3_LED2_ON,
306 .active_low = 0,
307 .default_trigger = "default-on",
308 },
309 };
310
311 static struct gpio_led_platform_data simpad_led_data = {
312 .num_leds = ARRAY_SIZE(simpad_leds),
313 .leds = simpad_leds,
314 };
315
316 static struct platform_device simpad_gpio_leds = {
317 .name = "leds-gpio",
318 .id = 0,
319 .dev = {
320 .platform_data = &simpad_led_data,
321 },
322 };
323
324 /*
325 * i2c
326 */
327 static struct i2c_gpio_platform_data simpad_i2c_data = {
328 .sda_pin = GPIO_GPIO21,
329 .scl_pin = GPIO_GPIO25,
330 .udelay = 10,
331 .timeout = HZ,
332 };
333
334 static struct platform_device simpad_i2c = {
335 .name = "i2c-gpio",
336 .id = 0,
337 .dev = {
338 .platform_data = &simpad_i2c_data,
339 },
340 };
341
342 /*
343 * MediaQ Video Device
344 */
345 static struct platform_device simpad_mq200fb = {
346 .name = "simpad-mq200",
347 .id = 0,
348 };
349
350 static struct platform_device *devices[] __initdata = {
351 &simpad_keys,
352 &simpad_polled_keys,
353 &simpad_mq200fb,
354 &simpad_gpio_leds,
355 &simpad_i2c,
356 };
357
358
359
simpad_init(void)360 static int __init simpad_init(void)
361 {
362 int ret;
363
364 spin_lock_init(&cs3_lock);
365
366 cs3_gpio.label = "simpad_cs3";
367 cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
368 cs3_gpio.ngpio = 24;
369 cs3_gpio.set = cs3_gpio_set;
370 cs3_gpio.get = cs3_gpio_get;
371 cs3_gpio.direction_input = cs3_gpio_direction_input;
372 cs3_gpio.direction_output = cs3_gpio_direction_output;
373 ret = gpiochip_add(&cs3_gpio);
374 if (ret)
375 printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
376
377 pm_power_off = simpad_power_off;
378
379 sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
380 ARRAY_SIZE(simpad_flash_resources));
381 sa11x0_register_mcp(&simpad_mcp_data);
382
383 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
384 if(ret)
385 printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
386
387 return 0;
388 }
389
390 arch_initcall(simpad_init);
391
392
393 MACHINE_START(SIMPAD, "Simpad")
394 /* Maintainer: Holger Freyther */
395 .atag_offset = 0x100,
396 .map_io = simpad_map_io,
397 .init_irq = sa1100_init_irq,
398 .timer = &sa1100_timer,
399 .restart = sa11x0_restart,
400 MACHINE_END
401