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 
47 static long cs3_shadow;
48 static spinlock_t cs3_lock;
49 static struct gpio_chip cs3_gpio;
50 
simpad_get_cs3_ro(void)51 long simpad_get_cs3_ro(void)
52 {
53 	return readl(CS3_BASE);
54 }
55 EXPORT_SYMBOL(simpad_get_cs3_ro);
56 
simpad_get_cs3_shadow(void)57 long simpad_get_cs3_shadow(void)
58 {
59 	return cs3_shadow;
60 }
61 EXPORT_SYMBOL(simpad_get_cs3_shadow);
62 
__simpad_write_cs3(void)63 static void __simpad_write_cs3(void)
64 {
65 	writel(cs3_shadow, CS3_BASE);
66 }
67 
simpad_set_cs3_bit(int value)68 void 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 }
77 EXPORT_SYMBOL(simpad_set_cs3_bit);
78 
simpad_clear_cs3_bit(int value)79 void 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 }
88 EXPORT_SYMBOL(simpad_clear_cs3_bit);
89 
cs3_gpio_set(struct gpio_chip * chip,unsigned offset,int value)90 static 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 
cs3_gpio_get(struct gpio_chip * chip,unsigned offset)100 static 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 
cs3_gpio_direction_input(struct gpio_chip * chip,unsigned offset)107 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
108 {
109 	if (offset > 15)
110 		return 0;
111 	return -EINVAL;
112 };
113 
cs3_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)114 static 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 
123 static 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 
simpad_uart_pm(struct uart_port * port,u_int state,u_int oldstate)138 static 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 
153 static struct sa1100_port_fns simpad_port_fns __initdata = {
154 	.pm	   = simpad_uart_pm,
155 };
156 
157 
158 static 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 
175 static 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 
182 static 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 
187 static struct ucb1x00_plat_data simpad_ucb1x00_data = {
188 	.gpio_base	= SIMPAD_UCB1X00_GPIO_BASE,
189 };
190 
191 static 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 
simpad_map_io(void)199 static 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 
simpad_power_off(void)232 static 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 
261 static struct gpio_keys_button simpad_button_table[] = {
262 	{ KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
263 };
264 
265 static struct gpio_keys_platform_data simpad_keys_data = {
266 	.buttons = simpad_button_table,
267 	.nbuttons = ARRAY_SIZE(simpad_button_table),
268 };
269 
270 static struct platform_device simpad_keys = {
271 	.name = "gpio-keys",
272 	.dev = {
273 		.platform_data = &simpad_keys_data,
274 	},
275 };
276 
277 static 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 
286 static 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 
292 static 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 
303 static 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 
312 static struct gpio_led_platform_data simpad_led_data = {
313 	.num_leds = ARRAY_SIZE(simpad_leds),
314 	.leds = simpad_leds,
315 };
316 
317 static 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  */
328 static 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 
338 static struct i2c_gpio_platform_data simpad_i2c_data = {
339 	.udelay = 10,
340 	.timeout = HZ,
341 };
342 
343 static 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  */
354 static struct platform_device simpad_mq200fb = {
355 	.name = "simpad-mq200",
356 	.id   = 0,
357 };
358 
359 static 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 */
368 static 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 
simpad_init(void)378 static 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 
411 arch_initcall(simpad_init);
412 
413 
414 MACHINE_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,
423 MACHINE_END
424