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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-sa1100/simpad.c

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  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_data/sa11x0-serial.h>
 13 #include <linux/platform_device.h>
 14 #include <linux/mfd/ucb1x00.h>
 15 #include <linux/mtd/mtd.h>
 16 #include <linux/mtd/partitions.h>
 17 #include <linux/io.h>
 18 #include <linux/gpio.h>
 19 
 20 #include <mach/hardware.h>
 21 #include <asm/setup.h>
 22 
 23 #include <asm/mach-types.h>
 24 #include <asm/mach/arch.h>
 25 #include <asm/mach/flash.h>
 26 #include <asm/mach/map.h>
 27 #include <linux/platform_data/mfd-mcp-sa11x0.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 
 48 long simpad_get_cs3_ro(void)
 49 {
 50         return readl(CS3_BASE);
 51 }
 52 EXPORT_SYMBOL(simpad_get_cs3_ro);
 53 
 54 long simpad_get_cs3_shadow(void)
 55 {
 56         return cs3_shadow;
 57 }
 58 EXPORT_SYMBOL(simpad_get_cs3_shadow);
 59 
 60 static void __simpad_write_cs3(void)
 61 {
 62         writel(cs3_shadow, CS3_BASE);
 63 }
 64 
 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 
 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 
 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 
 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 
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 
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        = (unsigned long)CS3_BASE,
128                 .pfn            = __phys_to_pfn(SA1100_CS3_PHYS),
129                 .length         = 0x00100000,
130                 .type           = MT_DEVICE
131         },
132 };
133 
134 
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 
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 
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 
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         .init_late      = sa11x0_init_late,
399         .init_time      = sa1100_timer_init,
400         .restart        = sa11x0_restart,
401 MACHINE_END
402 

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