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#include <asm/irq.h>
23
24#include <asm/mach-types.h>
25#include <asm/mach/arch.h>
26#include <asm/mach/flash.h>
27#include <asm/mach/map.h>
28#include <linux/platform_data/mfd-mcp-sa11x0.h>
29#include <mach/simpad.h>
30#include <mach/irqs.h>
31
32#include <linux/serial_core.h>
33#include <linux/ioport.h>
34#include <linux/input.h>
35#include <linux/gpio_keys.h>
36#include <linux/leds.h>
37#include <linux/i2c-gpio.h>
38
39#include "generic.h"
40
41/*
42 * CS3 support
43 */
44
45static long cs3_shadow;
46static spinlock_t cs3_lock;
47static struct gpio_chip cs3_gpio;
48
49long simpad_get_cs3_ro(void)
50{
51	return readl(CS3_BASE);
52}
53EXPORT_SYMBOL(simpad_get_cs3_ro);
54
55long simpad_get_cs3_shadow(void)
56{
57	return cs3_shadow;
58}
59EXPORT_SYMBOL(simpad_get_cs3_shadow);
60
61static void __simpad_write_cs3(void)
62{
63	writel(cs3_shadow, CS3_BASE);
64}
65
66void simpad_set_cs3_bit(int value)
67{
68	unsigned long flags;
69
70	spin_lock_irqsave(&cs3_lock, flags);
71	cs3_shadow |= value;
72	__simpad_write_cs3();
73	spin_unlock_irqrestore(&cs3_lock, flags);
74}
75EXPORT_SYMBOL(simpad_set_cs3_bit);
76
77void simpad_clear_cs3_bit(int value)
78{
79	unsigned long flags;
80
81	spin_lock_irqsave(&cs3_lock, flags);
82	cs3_shadow &= ~value;
83	__simpad_write_cs3();
84	spin_unlock_irqrestore(&cs3_lock, flags);
85}
86EXPORT_SYMBOL(simpad_clear_cs3_bit);
87
88static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
89{
90	if (offset > 15)
91		return;
92	if (value)
93		simpad_set_cs3_bit(1 << offset);
94	else
95		simpad_clear_cs3_bit(1 << offset);
96};
97
98static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
99{
100	if (offset > 15)
101		return simpad_get_cs3_ro() & (1 << (offset - 16));
102	return simpad_get_cs3_shadow() & (1 << offset);
103};
104
105static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
106{
107	if (offset > 15)
108		return 0;
109	return -EINVAL;
110};
111
112static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
113	int value)
114{
115	if (offset > 15)
116		return -EINVAL;
117	cs3_gpio_set(chip, offset, value);
118	return 0;
119};
120
121static struct map_desc simpad_io_desc[] __initdata = {
122	{	/* MQ200 */
123		.virtual	=  0xf2800000,
124		.pfn		= __phys_to_pfn(0x4b800000),
125		.length		= 0x00800000,
126		.type		= MT_DEVICE
127	}, {	/* Simpad CS3 */
128		.virtual	= (unsigned long)CS3_BASE,
129		.pfn		= __phys_to_pfn(SA1100_CS3_PHYS),
130		.length		= 0x00100000,
131		.type		= MT_DEVICE
132	},
133};
134
135
136static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
137{
138	if (port->mapbase == (u_int)&Ser1UTCR0) {
139		if (state)
140		{
141			simpad_clear_cs3_bit(RS232_ON);
142			simpad_clear_cs3_bit(DECT_POWER_ON);
143		}else
144		{
145			simpad_set_cs3_bit(RS232_ON);
146			simpad_set_cs3_bit(DECT_POWER_ON);
147		}
148	}
149}
150
151static struct sa1100_port_fns simpad_port_fns __initdata = {
152	.pm	   = simpad_uart_pm,
153};
154
155
156static struct mtd_partition simpad_partitions[] = {
157	{
158		.name       = "SIMpad boot firmware",
159		.size       = 0x00080000,
160		.offset     = 0,
161		.mask_flags = MTD_WRITEABLE,
162	}, {
163		.name       = "SIMpad kernel",
164		.size       = 0x0010000,
165		.offset     = MTDPART_OFS_APPEND,
166	}, {
167		.name       = "SIMpad root jffs2",
168		.size       = MTDPART_SIZ_FULL,
169		.offset     = MTDPART_OFS_APPEND,
170	}
171};
172
173static struct flash_platform_data simpad_flash_data = {
174	.map_name    = "cfi_probe",
175	.parts       = simpad_partitions,
176	.nr_parts    = ARRAY_SIZE(simpad_partitions),
177};
178
179
180static struct resource simpad_flash_resources [] = {
181	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
182	DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
183};
184
185static struct ucb1x00_plat_data simpad_ucb1x00_data = {
186	.gpio_base	= SIMPAD_UCB1X00_GPIO_BASE,
187};
188
189static struct mcp_plat_data simpad_mcp_data = {
190	.mccr0		= MCCR0_ADM,
191	.sclk_rate	= 11981000,
192	.codec_pdata	= &simpad_ucb1x00_data,
193};
194
195
196
197static void __init simpad_map_io(void)
198{
199	sa1100_map_io();
200
201	iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
202
203	/* Initialize CS3 */
204	cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
205		RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
206	__simpad_write_cs3(); /* Spinlocks not yet initialized */
207
208        sa1100_register_uart_fns(&simpad_port_fns);
209	sa1100_register_uart(0, 3);  /* serial interface */
210	sa1100_register_uart(1, 1);  /* DECT             */
211
212	// Reassign UART 1 pins
213	GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
214	GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
215	GPDR &= ~GPIO_UART_RXD;
216	PPAR |= PPAR_UPR;
217
218	/*
219	 * Set up registers for sleep mode.
220	 */
221
222
223	PWER = PWER_GPIO0| PWER_RTC;
224	PGSR = 0x818;
225	PCFR = 0;
226	PSDR = 0;
227
228}
229
230static void simpad_power_off(void)
231{
232	local_irq_disable();
233	cs3_shadow = SD_MEDIAQ;
234	__simpad_write_cs3(); /* Bypass spinlock here */
235
236	/* disable internal oscillator, float CS lines */
237	PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
238	/* enable wake-up on GPIO0 */
239	PWER = GFER = GRER = PWER_GPIO0;
240	/*
241	 * set scratchpad to zero, just in case it is used as a
242	 * restart address by the bootloader.
243	 */
244	PSPR = 0;
245	PGSR = 0;
246	/* enter sleep mode */
247	PMCR = PMCR_SF;
248	while(1);
249
250	local_irq_enable(); /* we won't ever call it */
251
252
253}
254
255/*
256 * gpio_keys
257*/
258
259static struct gpio_keys_button simpad_button_table[] = {
260	{ KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
261};
262
263static struct gpio_keys_platform_data simpad_keys_data = {
264	.buttons = simpad_button_table,
265	.nbuttons = ARRAY_SIZE(simpad_button_table),
266};
267
268static struct platform_device simpad_keys = {
269	.name = "gpio-keys",
270	.dev = {
271		.platform_data = &simpad_keys_data,
272	},
273};
274
275static struct gpio_keys_button simpad_polled_button_table[] = {
276	{ KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
277	{ KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
278	{ KEY_UP,    SIMPAD_UCB1X00_GPIO_UP,    1, "up button" },
279	{ KEY_DOWN,  SIMPAD_UCB1X00_GPIO_DOWN,  1, "down button" },
280	{ KEY_LEFT,  SIMPAD_UCB1X00_GPIO_LEFT,  1, "left button" },
281	{ KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
282};
283
284static struct gpio_keys_platform_data simpad_polled_keys_data = {
285	.buttons = simpad_polled_button_table,
286	.nbuttons = ARRAY_SIZE(simpad_polled_button_table),
287	.poll_interval = 50,
288};
289
290static struct platform_device simpad_polled_keys = {
291	.name = "gpio-keys-polled",
292	.dev = {
293		.platform_data = &simpad_polled_keys_data,
294	},
295};
296
297/*
298 * GPIO LEDs
299 */
300
301static struct gpio_led simpad_leds[] = {
302	{
303		.name = "simpad:power",
304		.gpio = SIMPAD_CS3_LED2_ON,
305		.active_low = 0,
306		.default_trigger = "default-on",
307	},
308};
309
310static struct gpio_led_platform_data simpad_led_data = {
311	.num_leds = ARRAY_SIZE(simpad_leds),
312	.leds = simpad_leds,
313};
314
315static struct platform_device simpad_gpio_leds = {
316	.name = "leds-gpio",
317	.id = 0,
318	.dev = {
319		.platform_data = &simpad_led_data,
320	},
321};
322
323/*
324 * i2c
325 */
326static struct i2c_gpio_platform_data simpad_i2c_data = {
327	.sda_pin = GPIO_GPIO21,
328	.scl_pin = GPIO_GPIO25,
329	.udelay = 10,
330	.timeout = HZ,
331};
332
333static struct platform_device simpad_i2c = {
334	.name = "i2c-gpio",
335	.id = 0,
336	.dev = {
337		.platform_data = &simpad_i2c_data,
338	},
339};
340
341/*
342 * MediaQ Video Device
343 */
344static struct platform_device simpad_mq200fb = {
345	.name = "simpad-mq200",
346	.id   = 0,
347};
348
349static struct platform_device *devices[] __initdata = {
350	&simpad_keys,
351	&simpad_polled_keys,
352	&simpad_mq200fb,
353	&simpad_gpio_leds,
354	&simpad_i2c,
355};
356
357
358
359static int __init simpad_init(void)
360{
361	int ret;
362
363	spin_lock_init(&cs3_lock);
364
365	cs3_gpio.label = "simpad_cs3";
366	cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
367	cs3_gpio.ngpio = 24;
368	cs3_gpio.set = cs3_gpio_set;
369	cs3_gpio.get = cs3_gpio_get;
370	cs3_gpio.direction_input = cs3_gpio_direction_input;
371	cs3_gpio.direction_output = cs3_gpio_direction_output;
372	ret = gpiochip_add(&cs3_gpio);
373	if (ret)
374		printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
375
376	pm_power_off = simpad_power_off;
377
378	sa11x0_ppc_configure_mcp();
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
390arch_initcall(simpad_init);
391
392
393MACHINE_START(SIMPAD, "Simpad")
394	/* Maintainer: Holger Freyther */
395	.atag_offset	= 0x100,
396	.map_io		= simpad_map_io,
397	.nr_irqs	= SA1100_NR_IRQS,
398	.init_irq	= sa1100_init_irq,
399	.init_late	= sa11x0_init_late,
400	.init_time	= sa1100_timer_init,
401	.restart	= sa11x0_restart,
402MACHINE_END
403