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/mfd/ucb1x00.h>
14 #include <linux/mtd/mtd.h>
15 #include <linux/mtd/partitions.h>
16 #include <linux/io.h>
17 #include <linux/gpio.h>
18
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 #include <mach/irqs.h>
30
31 #include <linux/serial_core.h>
32 #include <linux/ioport.h>
33 #include <linux/input.h>
34 #include <linux/gpio_keys.h>
35 #include <linux/leds.h>
36 #include <linux/i2c-gpio.h>
37
38 #include "generic.h"
39
40 /*
41 * CS3 support
42 */
43
44 static long cs3_shadow;
45 static spinlock_t cs3_lock;
46 static struct gpio_chip cs3_gpio;
47
simpad_get_cs3_ro(void)48 long simpad_get_cs3_ro(void)
49 {
50 return readl(CS3_BASE);
51 }
52 EXPORT_SYMBOL(simpad_get_cs3_ro);
53
simpad_get_cs3_shadow(void)54 long simpad_get_cs3_shadow(void)
55 {
56 return cs3_shadow;
57 }
58 EXPORT_SYMBOL(simpad_get_cs3_shadow);
59
__simpad_write_cs3(void)60 static void __simpad_write_cs3(void)
61 {
62 writel(cs3_shadow, CS3_BASE);
63 }
64
simpad_set_cs3_bit(int value)65 void simpad_set_cs3_bit(int value)
66 {
67 unsigned long flags;
68
69 spin_lock_irqsave(&cs3_lock, flags);
70 cs3_shadow |= value;
71 __simpad_write_cs3();
72 spin_unlock_irqrestore(&cs3_lock, flags);
73 }
74 EXPORT_SYMBOL(simpad_set_cs3_bit);
75
simpad_clear_cs3_bit(int value)76 void simpad_clear_cs3_bit(int value)
77 {
78 unsigned long flags;
79
80 spin_lock_irqsave(&cs3_lock, flags);
81 cs3_shadow &= ~value;
82 __simpad_write_cs3();
83 spin_unlock_irqrestore(&cs3_lock, flags);
84 }
85 EXPORT_SYMBOL(simpad_clear_cs3_bit);
86
cs3_gpio_set(struct gpio_chip * chip,unsigned offset,int value)87 static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
88 {
89 if (offset > 15)
90 return;
91 if (value)
92 simpad_set_cs3_bit(1 << offset);
93 else
94 simpad_clear_cs3_bit(1 << offset);
95 };
96
cs3_gpio_get(struct gpio_chip * chip,unsigned offset)97 static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
98 {
99 if (offset > 15)
100 return simpad_get_cs3_ro() & (1 << (offset - 16));
101 return simpad_get_cs3_shadow() & (1 << offset);
102 };
103
cs3_gpio_direction_input(struct gpio_chip * chip,unsigned offset)104 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
105 {
106 if (offset > 15)
107 return 0;
108 return -EINVAL;
109 };
110
cs3_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)111 static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
112 int value)
113 {
114 if (offset > 15)
115 return -EINVAL;
116 cs3_gpio_set(chip, offset, value);
117 return 0;
118 };
119
120 static struct map_desc simpad_io_desc[] __initdata = {
121 { /* MQ200 */
122 .virtual = 0xf2800000,
123 .pfn = __phys_to_pfn(0x4b800000),
124 .length = 0x00800000,
125 .type = MT_DEVICE
126 }, { /* Simpad CS3 */
127 .virtual = CS3_BASE,
128 .pfn = __phys_to_pfn(SA1100_CS3_PHYS),
129 .length = 0x00100000,
130 .type = MT_DEVICE
131 },
132 };
133
134
simpad_uart_pm(struct uart_port * port,u_int state,u_int oldstate)135 static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
136 {
137 if (port->mapbase == (u_int)&Ser1UTCR0) {
138 if (state)
139 {
140 simpad_clear_cs3_bit(RS232_ON);
141 simpad_clear_cs3_bit(DECT_POWER_ON);
142 }else
143 {
144 simpad_set_cs3_bit(RS232_ON);
145 simpad_set_cs3_bit(DECT_POWER_ON);
146 }
147 }
148 }
149
150 static struct sa1100_port_fns simpad_port_fns __initdata = {
151 .pm = simpad_uart_pm,
152 };
153
154
155 static struct mtd_partition simpad_partitions[] = {
156 {
157 .name = "SIMpad boot firmware",
158 .size = 0x00080000,
159 .offset = 0,
160 .mask_flags = MTD_WRITEABLE,
161 }, {
162 .name = "SIMpad kernel",
163 .size = 0x0010000,
164 .offset = MTDPART_OFS_APPEND,
165 }, {
166 .name = "SIMpad root jffs2",
167 .size = MTDPART_SIZ_FULL,
168 .offset = MTDPART_OFS_APPEND,
169 }
170 };
171
172 static struct flash_platform_data simpad_flash_data = {
173 .map_name = "cfi_probe",
174 .parts = simpad_partitions,
175 .nr_parts = ARRAY_SIZE(simpad_partitions),
176 };
177
178
179 static struct resource simpad_flash_resources [] = {
180 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
181 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
182 };
183
184 static struct ucb1x00_plat_data simpad_ucb1x00_data = {
185 .gpio_base = SIMPAD_UCB1X00_GPIO_BASE,
186 };
187
188 static struct mcp_plat_data simpad_mcp_data = {
189 .mccr0 = MCCR0_ADM,
190 .sclk_rate = 11981000,
191 .codec_pdata = &simpad_ucb1x00_data,
192 };
193
194
195
simpad_map_io(void)196 static void __init simpad_map_io(void)
197 {
198 sa1100_map_io();
199
200 iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
201
202 /* Initialize CS3 */
203 cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
204 RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
205 __simpad_write_cs3(); /* Spinlocks not yet initialized */
206
207 sa1100_register_uart_fns(&simpad_port_fns);
208 sa1100_register_uart(0, 3); /* serial interface */
209 sa1100_register_uart(1, 1); /* DECT */
210
211 // Reassign UART 1 pins
212 GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
213 GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
214 GPDR &= ~GPIO_UART_RXD;
215 PPAR |= PPAR_UPR;
216
217 /*
218 * Set up registers for sleep mode.
219 */
220
221
222 PWER = PWER_GPIO0| PWER_RTC;
223 PGSR = 0x818;
224 PCFR = 0;
225 PSDR = 0;
226
227 }
228
simpad_power_off(void)229 static void simpad_power_off(void)
230 {
231 local_irq_disable();
232 cs3_shadow = SD_MEDIAQ;
233 __simpad_write_cs3(); /* Bypass spinlock here */
234
235 /* disable internal oscillator, float CS lines */
236 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
237 /* enable wake-up on GPIO0 */
238 PWER = GFER = GRER = PWER_GPIO0;
239 /*
240 * set scratchpad to zero, just in case it is used as a
241 * restart address by the bootloader.
242 */
243 PSPR = 0;
244 PGSR = 0;
245 /* enter sleep mode */
246 PMCR = PMCR_SF;
247 while(1);
248
249 local_irq_enable(); /* we won't ever call it */
250
251
252 }
253
254 /*
255 * gpio_keys
256 */
257
258 static struct gpio_keys_button simpad_button_table[] = {
259 { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
260 };
261
262 static struct gpio_keys_platform_data simpad_keys_data = {
263 .buttons = simpad_button_table,
264 .nbuttons = ARRAY_SIZE(simpad_button_table),
265 };
266
267 static struct platform_device simpad_keys = {
268 .name = "gpio-keys",
269 .dev = {
270 .platform_data = &simpad_keys_data,
271 },
272 };
273
274 static struct gpio_keys_button simpad_polled_button_table[] = {
275 { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
276 { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
277 { KEY_UP, SIMPAD_UCB1X00_GPIO_UP, 1, "up button" },
278 { KEY_DOWN, SIMPAD_UCB1X00_GPIO_DOWN, 1, "down button" },
279 { KEY_LEFT, SIMPAD_UCB1X00_GPIO_LEFT, 1, "left button" },
280 { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
281 };
282
283 static struct gpio_keys_platform_data simpad_polled_keys_data = {
284 .buttons = simpad_polled_button_table,
285 .nbuttons = ARRAY_SIZE(simpad_polled_button_table),
286 .poll_interval = 50,
287 };
288
289 static struct platform_device simpad_polled_keys = {
290 .name = "gpio-keys-polled",
291 .dev = {
292 .platform_data = &simpad_polled_keys_data,
293 },
294 };
295
296 /*
297 * GPIO LEDs
298 */
299
300 static struct gpio_led simpad_leds[] = {
301 {
302 .name = "simpad:power",
303 .gpio = SIMPAD_CS3_LED2_ON,
304 .active_low = 0,
305 .default_trigger = "default-on",
306 },
307 };
308
309 static struct gpio_led_platform_data simpad_led_data = {
310 .num_leds = ARRAY_SIZE(simpad_leds),
311 .leds = simpad_leds,
312 };
313
314 static struct platform_device simpad_gpio_leds = {
315 .name = "leds-gpio",
316 .id = 0,
317 .dev = {
318 .platform_data = &simpad_led_data,
319 },
320 };
321
322 /*
323 * i2c
324 */
325 static struct i2c_gpio_platform_data simpad_i2c_data = {
326 .sda_pin = GPIO_GPIO21,
327 .scl_pin = GPIO_GPIO25,
328 .udelay = 10,
329 .timeout = HZ,
330 };
331
332 static struct platform_device simpad_i2c = {
333 .name = "i2c-gpio",
334 .id = 0,
335 .dev = {
336 .platform_data = &simpad_i2c_data,
337 },
338 };
339
340 /*
341 * MediaQ Video Device
342 */
343 static struct platform_device simpad_mq200fb = {
344 .name = "simpad-mq200",
345 .id = 0,
346 };
347
348 static struct platform_device *devices[] __initdata = {
349 &simpad_keys,
350 &simpad_polled_keys,
351 &simpad_mq200fb,
352 &simpad_gpio_leds,
353 &simpad_i2c,
354 };
355
356
357
simpad_init(void)358 static int __init simpad_init(void)
359 {
360 int ret;
361
362 spin_lock_init(&cs3_lock);
363
364 cs3_gpio.label = "simpad_cs3";
365 cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
366 cs3_gpio.ngpio = 24;
367 cs3_gpio.set = cs3_gpio_set;
368 cs3_gpio.get = cs3_gpio_get;
369 cs3_gpio.direction_input = cs3_gpio_direction_input;
370 cs3_gpio.direction_output = cs3_gpio_direction_output;
371 ret = gpiochip_add(&cs3_gpio);
372 if (ret)
373 printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
374
375 pm_power_off = simpad_power_off;
376
377 sa11x0_ppc_configure_mcp();
378 sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
379 ARRAY_SIZE(simpad_flash_resources));
380 sa11x0_register_mcp(&simpad_mcp_data);
381
382 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
383 if(ret)
384 printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
385
386 return 0;
387 }
388
389 arch_initcall(simpad_init);
390
391
392 MACHINE_START(SIMPAD, "Simpad")
393 /* Maintainer: Holger Freyther */
394 .atag_offset = 0x100,
395 .map_io = simpad_map_io,
396 .nr_irqs = SA1100_NR_IRQS,
397 .init_irq = sa1100_init_irq,
398 .timer = &sa1100_timer,
399 .restart = sa11x0_restart,
400 MACHINE_END
401