1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/arm/mach-sa1100/simpad.c
4 */
5
6#include <linux/module.h>
7#include <linux/gpio/machine.h>
8#include <linux/init.h>
9#include <linux/kernel.h>
10#include <linux/tty.h>
11#include <linux/proc_fs.h>
12#include <linux/string.h>
13#include <linux/pm.h>
14#include <linux/platform_data/sa11x0-serial.h>
15#include <linux/platform_device.h>
16#include <linux/mfd/ucb1x00.h>
17#include <linux/mtd/mtd.h>
18#include <linux/mtd/partitions.h>
19#include <linux/io.h>
20#include <linux/gpio/driver.h>
21
22#include <mach/hardware.h>
23#include <asm/setup.h>
24#include <asm/irq.h>
25
26#include <asm/mach-types.h>
27#include <asm/mach/arch.h>
28#include <asm/mach/flash.h>
29#include <asm/mach/map.h>
30#include <linux/platform_data/mfd-mcp-sa11x0.h>
31#include <mach/simpad.h>
32#include <mach/irqs.h>
33
34#include <linux/serial_core.h>
35#include <linux/ioport.h>
36#include <linux/input.h>
37#include <linux/gpio_keys.h>
38#include <linux/leds.h>
39#include <linux/platform_data/i2c-gpio.h>
40
41#include "generic.h"
42
43/*
44 * CS3 support
45 */
46
47static long cs3_shadow;
48static spinlock_t cs3_lock;
49static struct gpio_chip cs3_gpio;
50
51long simpad_get_cs3_ro(void)
52{
53	return readl(CS3_BASE);
54}
55EXPORT_SYMBOL(simpad_get_cs3_ro);
56
57long simpad_get_cs3_shadow(void)
58{
59	return cs3_shadow;
60}
61EXPORT_SYMBOL(simpad_get_cs3_shadow);
62
63static void __simpad_write_cs3(void)
64{
65	writel(cs3_shadow, CS3_BASE);
66}
67
68void simpad_set_cs3_bit(int value)
69{
70	unsigned long flags;
71
72	spin_lock_irqsave(&cs3_lock, flags);
73	cs3_shadow |= value;
74	__simpad_write_cs3();
75	spin_unlock_irqrestore(&cs3_lock, flags);
76}
77EXPORT_SYMBOL(simpad_set_cs3_bit);
78
79void simpad_clear_cs3_bit(int value)
80{
81	unsigned long flags;
82
83	spin_lock_irqsave(&cs3_lock, flags);
84	cs3_shadow &= ~value;
85	__simpad_write_cs3();
86	spin_unlock_irqrestore(&cs3_lock, flags);
87}
88EXPORT_SYMBOL(simpad_clear_cs3_bit);
89
90static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
91{
92	if (offset > 15)
93		return;
94	if (value)
95		simpad_set_cs3_bit(1 << offset);
96	else
97		simpad_clear_cs3_bit(1 << offset);
98};
99
100static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
101{
102	if (offset > 15)
103		return !!(simpad_get_cs3_ro() & (1 << (offset - 16)));
104	return !!(simpad_get_cs3_shadow() & (1 << offset));
105};
106
107static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
108{
109	if (offset > 15)
110		return 0;
111	return -EINVAL;
112};
113
114static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
115	int value)
116{
117	if (offset > 15)
118		return -EINVAL;
119	cs3_gpio_set(chip, offset, value);
120	return 0;
121};
122
123static struct map_desc simpad_io_desc[] __initdata = {
124	{	/* MQ200 */
125		.virtual	=  0xf2800000,
126		.pfn		= __phys_to_pfn(0x4b800000),
127		.length		= 0x00800000,
128		.type		= MT_DEVICE
129	}, {	/* Simpad CS3 */
130		.virtual	= (unsigned long)CS3_BASE,
131		.pfn		= __phys_to_pfn(SA1100_CS3_PHYS),
132		.length		= 0x00100000,
133		.type		= MT_DEVICE
134	},
135};
136
137
138static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
139{
140	if (port->mapbase == (u_int)&Ser1UTCR0) {
141		if (state)
142		{
143			simpad_clear_cs3_bit(RS232_ON);
144			simpad_clear_cs3_bit(DECT_POWER_ON);
145		}else
146		{
147			simpad_set_cs3_bit(RS232_ON);
148			simpad_set_cs3_bit(DECT_POWER_ON);
149		}
150	}
151}
152
153static struct sa1100_port_fns simpad_port_fns __initdata = {
154	.pm	   = simpad_uart_pm,
155};
156
157
158static struct mtd_partition simpad_partitions[] = {
159	{
160		.name       = "SIMpad boot firmware",
161		.size       = 0x00080000,
162		.offset     = 0,
163		.mask_flags = MTD_WRITEABLE,
164	}, {
165		.name       = "SIMpad kernel",
166		.size       = 0x0010000,
167		.offset     = MTDPART_OFS_APPEND,
168	}, {
169		.name       = "SIMpad root jffs2",
170		.size       = MTDPART_SIZ_FULL,
171		.offset     = MTDPART_OFS_APPEND,
172	}
173};
174
175static struct flash_platform_data simpad_flash_data = {
176	.map_name    = "cfi_probe",
177	.parts       = simpad_partitions,
178	.nr_parts    = ARRAY_SIZE(simpad_partitions),
179};
180
181
182static struct resource simpad_flash_resources [] = {
183	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
184	DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
185};
186
187static struct ucb1x00_plat_data simpad_ucb1x00_data = {
188	.gpio_base	= SIMPAD_UCB1X00_GPIO_BASE,
189};
190
191static struct mcp_plat_data simpad_mcp_data = {
192	.mccr0		= MCCR0_ADM,
193	.sclk_rate	= 11981000,
194	.codec_pdata	= &simpad_ucb1x00_data,
195};
196
197
198
199static void __init simpad_map_io(void)
200{
201	sa1100_map_io();
202
203	iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
204
205	/* Initialize CS3 */
206	cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
207		RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
208	__simpad_write_cs3(); /* Spinlocks not yet initialized */
209
210        sa1100_register_uart_fns(&simpad_port_fns);
211	sa1100_register_uart(0, 3);  /* serial interface */
212	sa1100_register_uart(1, 1);  /* DECT             */
213
214	// Reassign UART 1 pins
215	GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
216	GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
217	GPDR &= ~GPIO_UART_RXD;
218	PPAR |= PPAR_UPR;
219
220	/*
221	 * Set up registers for sleep mode.
222	 */
223
224
225	PWER = PWER_GPIO0| PWER_RTC;
226	PGSR = 0x818;
227	PCFR = 0;
228	PSDR = 0;
229
230}
231
232static void simpad_power_off(void)
233{
234	local_irq_disable();
235	cs3_shadow = SD_MEDIAQ;
236	__simpad_write_cs3(); /* Bypass spinlock here */
237
238	/* disable internal oscillator, float CS lines */
239	PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
240	/* enable wake-up on GPIO0 */
241	PWER = GFER = GRER = PWER_GPIO0;
242	/*
243	 * set scratchpad to zero, just in case it is used as a
244	 * restart address by the bootloader.
245	 */
246	PSPR = 0;
247	PGSR = 0;
248	/* enter sleep mode */
249	PMCR = PMCR_SF;
250	while(1);
251
252	local_irq_enable(); /* we won't ever call it */
253
254
255}
256
257/*
258 * gpio_keys
259*/
260
261static struct gpio_keys_button simpad_button_table[] = {
262	{ KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
263};
264
265static struct gpio_keys_platform_data simpad_keys_data = {
266	.buttons = simpad_button_table,
267	.nbuttons = ARRAY_SIZE(simpad_button_table),
268};
269
270static struct platform_device simpad_keys = {
271	.name = "gpio-keys",
272	.dev = {
273		.platform_data = &simpad_keys_data,
274	},
275};
276
277static struct gpio_keys_button simpad_polled_button_table[] = {
278	{ KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
279	{ KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
280	{ KEY_UP,    SIMPAD_UCB1X00_GPIO_UP,    1, "up button" },
281	{ KEY_DOWN,  SIMPAD_UCB1X00_GPIO_DOWN,  1, "down button" },
282	{ KEY_LEFT,  SIMPAD_UCB1X00_GPIO_LEFT,  1, "left button" },
283	{ KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
284};
285
286static struct gpio_keys_platform_data simpad_polled_keys_data = {
287	.buttons = simpad_polled_button_table,
288	.nbuttons = ARRAY_SIZE(simpad_polled_button_table),
289	.poll_interval = 50,
290};
291
292static struct platform_device simpad_polled_keys = {
293	.name = "gpio-keys-polled",
294	.dev = {
295		.platform_data = &simpad_polled_keys_data,
296	},
297};
298
299/*
300 * GPIO LEDs
301 */
302
303static struct gpio_led simpad_leds[] = {
304	{
305		.name = "simpad:power",
306		.gpio = SIMPAD_CS3_LED2_ON,
307		.active_low = 0,
308		.default_trigger = "default-on",
309	},
310};
311
312static struct gpio_led_platform_data simpad_led_data = {
313	.num_leds = ARRAY_SIZE(simpad_leds),
314	.leds = simpad_leds,
315};
316
317static struct platform_device simpad_gpio_leds = {
318	.name = "leds-gpio",
319	.id = 0,
320	.dev = {
321		.platform_data = &simpad_led_data,
322	},
323};
324
325/*
326 * i2c
327 */
328static struct gpiod_lookup_table simpad_i2c_gpiod_table = {
329	.dev_id = "i2c-gpio.0",
330	.table = {
331		GPIO_LOOKUP_IDX("gpio", 21, NULL, 0,
332				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
333		GPIO_LOOKUP_IDX("gpio", 25, NULL, 1,
334				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
335	},
336};
337
338static struct i2c_gpio_platform_data simpad_i2c_data = {
339	.udelay = 10,
340	.timeout = HZ,
341};
342
343static struct platform_device simpad_i2c = {
344	.name = "i2c-gpio",
345	.id = 0,
346	.dev = {
347		.platform_data = &simpad_i2c_data,
348	},
349};
350
351/*
352 * MediaQ Video Device
353 */
354static struct platform_device simpad_mq200fb = {
355	.name = "simpad-mq200",
356	.id   = 0,
357};
358
359static struct platform_device *devices[] __initdata = {
360	&simpad_keys,
361	&simpad_polled_keys,
362	&simpad_mq200fb,
363	&simpad_gpio_leds,
364	&simpad_i2c,
365};
366
367/* Compact Flash */
368static struct gpiod_lookup_table simpad_cf_gpio_table = {
369	.dev_id = "sa11x0-pcmcia",
370	.table = {
371		GPIO_LOOKUP("gpio", GPIO_CF_IRQ, "cf-ready", GPIO_ACTIVE_HIGH),
372		GPIO_LOOKUP("gpio", GPIO_CF_CD, "cf-detect", GPIO_ACTIVE_HIGH),
373		{ },
374	},
375};
376
377
378static int __init simpad_init(void)
379{
380	int ret;
381
382	spin_lock_init(&cs3_lock);
383
384	cs3_gpio.label = "simpad_cs3";
385	cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
386	cs3_gpio.ngpio = 24;
387	cs3_gpio.set = cs3_gpio_set;
388	cs3_gpio.get = cs3_gpio_get;
389	cs3_gpio.direction_input = cs3_gpio_direction_input;
390	cs3_gpio.direction_output = cs3_gpio_direction_output;
391	ret = gpiochip_add_data(&cs3_gpio, NULL);
392	if (ret)
393		printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
394
395	pm_power_off = simpad_power_off;
396
397	sa11x0_register_pcmcia(-1, &simpad_cf_gpio_table);
398	sa11x0_ppc_configure_mcp();
399	sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
400			      ARRAY_SIZE(simpad_flash_resources));
401	sa11x0_register_mcp(&simpad_mcp_data);
402
403	gpiod_add_lookup_table(&simpad_i2c_gpiod_table);
404	ret = platform_add_devices(devices, ARRAY_SIZE(devices));
405	if(ret)
406		printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
407
408	return 0;
409}
410
411arch_initcall(simpad_init);
412
413
414MACHINE_START(SIMPAD, "Simpad")
415	/* Maintainer: Holger Freyther */
416	.atag_offset	= 0x100,
417	.map_io		= simpad_map_io,
418	.nr_irqs	= SA1100_NR_IRQS,
419	.init_irq	= sa1100_init_irq,
420	.init_late	= sa11x0_init_late,
421	.init_time	= sa1100_timer_init,
422	.restart	= sa11x0_restart,
423MACHINE_END
424