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 #include <linux/gpio/machine.h>
22
23 #include <mach/hardware.h>
24 #include <asm/setup.h>
25 #include <asm/irq.h>
26
27 #include <asm/mach-types.h>
28 #include <asm/mach/arch.h>
29 #include <asm/mach/flash.h>
30 #include <asm/mach/map.h>
31 #include <linux/platform_data/mfd-mcp-sa11x0.h>
32 #include <mach/simpad.h>
33 #include <mach/irqs.h>
34
35 #include <linux/serial_core.h>
36 #include <linux/ioport.h>
37 #include <linux/input.h>
38 #include <linux/gpio_keys.h>
39 #include <linux/leds.h>
40 #include <linux/platform_data/i2c-gpio.h>
41
42 #include "generic.h"
43
44 /*
45 * CS3 support
46 */
47
48 static long cs3_shadow;
49 static spinlock_t cs3_lock;
50 static struct gpio_chip cs3_gpio;
51
simpad_get_cs3_ro(void)52 long simpad_get_cs3_ro(void)
53 {
54 return readl(CS3_BASE);
55 }
56 EXPORT_SYMBOL(simpad_get_cs3_ro);
57
simpad_get_cs3_shadow(void)58 long simpad_get_cs3_shadow(void)
59 {
60 return cs3_shadow;
61 }
62 EXPORT_SYMBOL(simpad_get_cs3_shadow);
63
__simpad_write_cs3(void)64 static void __simpad_write_cs3(void)
65 {
66 writel(cs3_shadow, CS3_BASE);
67 }
68
simpad_set_cs3_bit(int value)69 void simpad_set_cs3_bit(int value)
70 {
71 unsigned long flags;
72
73 spin_lock_irqsave(&cs3_lock, flags);
74 cs3_shadow |= value;
75 __simpad_write_cs3();
76 spin_unlock_irqrestore(&cs3_lock, flags);
77 }
78 EXPORT_SYMBOL(simpad_set_cs3_bit);
79
simpad_clear_cs3_bit(int value)80 void simpad_clear_cs3_bit(int value)
81 {
82 unsigned long flags;
83
84 spin_lock_irqsave(&cs3_lock, flags);
85 cs3_shadow &= ~value;
86 __simpad_write_cs3();
87 spin_unlock_irqrestore(&cs3_lock, flags);
88 }
89 EXPORT_SYMBOL(simpad_clear_cs3_bit);
90
cs3_gpio_set(struct gpio_chip * chip,unsigned offset,int value)91 static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
92 {
93 if (offset > 15)
94 return;
95 if (value)
96 simpad_set_cs3_bit(1 << offset);
97 else
98 simpad_clear_cs3_bit(1 << offset);
99 };
100
cs3_gpio_get(struct gpio_chip * chip,unsigned offset)101 static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
102 {
103 if (offset > 15)
104 return !!(simpad_get_cs3_ro() & (1 << (offset - 16)));
105 return !!(simpad_get_cs3_shadow() & (1 << offset));
106 };
107
cs3_gpio_direction_input(struct gpio_chip * chip,unsigned offset)108 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
109 {
110 if (offset > 15)
111 return 0;
112 return -EINVAL;
113 };
114
cs3_gpio_direction_output(struct gpio_chip * chip,unsigned offset,int value)115 static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
116 int value)
117 {
118 if (offset > 15)
119 return -EINVAL;
120 cs3_gpio_set(chip, offset, value);
121 return 0;
122 };
123
124 static struct map_desc simpad_io_desc[] __initdata = {
125 { /* MQ200 */
126 .virtual = 0xf2800000,
127 .pfn = __phys_to_pfn(0x4b800000),
128 .length = 0x00800000,
129 .type = MT_DEVICE
130 }, { /* Simpad CS3 */
131 .virtual = (unsigned long)CS3_BASE,
132 .pfn = __phys_to_pfn(SA1100_CS3_PHYS),
133 .length = 0x00100000,
134 .type = MT_DEVICE
135 },
136 };
137
138
simpad_uart_pm(struct uart_port * port,u_int state,u_int oldstate)139 static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
140 {
141 if (port->mapbase == (u_int)&Ser1UTCR0) {
142 if (state)
143 {
144 simpad_clear_cs3_bit(RS232_ON);
145 simpad_clear_cs3_bit(DECT_POWER_ON);
146 }else
147 {
148 simpad_set_cs3_bit(RS232_ON);
149 simpad_set_cs3_bit(DECT_POWER_ON);
150 }
151 }
152 }
153
154 static struct sa1100_port_fns simpad_port_fns __initdata = {
155 .pm = simpad_uart_pm,
156 };
157
158
159 static struct mtd_partition simpad_partitions[] = {
160 {
161 .name = "SIMpad boot firmware",
162 .size = 0x00080000,
163 .offset = 0,
164 .mask_flags = MTD_WRITEABLE,
165 }, {
166 .name = "SIMpad kernel",
167 .size = 0x0010000,
168 .offset = MTDPART_OFS_APPEND,
169 }, {
170 .name = "SIMpad root jffs2",
171 .size = MTDPART_SIZ_FULL,
172 .offset = MTDPART_OFS_APPEND,
173 }
174 };
175
176 static struct flash_platform_data simpad_flash_data = {
177 .map_name = "cfi_probe",
178 .parts = simpad_partitions,
179 .nr_parts = ARRAY_SIZE(simpad_partitions),
180 };
181
182
183 static struct resource simpad_flash_resources [] = {
184 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
185 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
186 };
187
188 static struct ucb1x00_plat_data simpad_ucb1x00_data = {
189 .gpio_base = SIMPAD_UCB1X00_GPIO_BASE,
190 };
191
192 static struct mcp_plat_data simpad_mcp_data = {
193 .mccr0 = MCCR0_ADM,
194 .sclk_rate = 11981000,
195 .codec_pdata = &simpad_ucb1x00_data,
196 };
197
198
199
simpad_map_io(void)200 static void __init simpad_map_io(void)
201 {
202 sa1100_map_io();
203
204 iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
205
206 /* Initialize CS3 */
207 cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
208 RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
209 __simpad_write_cs3(); /* Spinlocks not yet initialized */
210
211 sa1100_register_uart_fns(&simpad_port_fns);
212 sa1100_register_uart(0, 3); /* serial interface */
213 sa1100_register_uart(1, 1); /* DECT */
214
215 // Reassign UART 1 pins
216 GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
217 GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
218 GPDR &= ~GPIO_UART_RXD;
219 PPAR |= PPAR_UPR;
220
221 /*
222 * Set up registers for sleep mode.
223 */
224
225
226 PWER = PWER_GPIO0| PWER_RTC;
227 PGSR = 0x818;
228 PCFR = 0;
229 PSDR = 0;
230
231 }
232
simpad_power_off(void)233 static void simpad_power_off(void)
234 {
235 local_irq_disable();
236 cs3_shadow = SD_MEDIAQ;
237 __simpad_write_cs3(); /* Bypass spinlock here */
238
239 /* disable internal oscillator, float CS lines */
240 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
241 /* enable wake-up on GPIO0 */
242 PWER = GFER = GRER = PWER_GPIO0;
243 /*
244 * set scratchpad to zero, just in case it is used as a
245 * restart address by the bootloader.
246 */
247 PSPR = 0;
248 PGSR = 0;
249 /* enter sleep mode */
250 PMCR = PMCR_SF;
251 while(1);
252
253 local_irq_enable(); /* we won't ever call it */
254
255
256 }
257
258 /*
259 * gpio_keys
260 */
261
262 static struct gpio_keys_button simpad_button_table[] = {
263 { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
264 };
265
266 static struct gpio_keys_platform_data simpad_keys_data = {
267 .buttons = simpad_button_table,
268 .nbuttons = ARRAY_SIZE(simpad_button_table),
269 };
270
271 static struct platform_device simpad_keys = {
272 .name = "gpio-keys",
273 .dev = {
274 .platform_data = &simpad_keys_data,
275 },
276 };
277
278 static struct gpio_keys_button simpad_polled_button_table[] = {
279 { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
280 { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
281 { KEY_UP, SIMPAD_UCB1X00_GPIO_UP, 1, "up button" },
282 { KEY_DOWN, SIMPAD_UCB1X00_GPIO_DOWN, 1, "down button" },
283 { KEY_LEFT, SIMPAD_UCB1X00_GPIO_LEFT, 1, "left button" },
284 { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
285 };
286
287 static struct gpio_keys_platform_data simpad_polled_keys_data = {
288 .buttons = simpad_polled_button_table,
289 .nbuttons = ARRAY_SIZE(simpad_polled_button_table),
290 .poll_interval = 50,
291 };
292
293 static struct platform_device simpad_polled_keys = {
294 .name = "gpio-keys-polled",
295 .dev = {
296 .platform_data = &simpad_polled_keys_data,
297 },
298 };
299
300 /*
301 * GPIO LEDs
302 */
303
304 static struct gpio_led simpad_leds[] = {
305 {
306 .name = "simpad:power",
307 .gpio = SIMPAD_CS3_LED2_ON,
308 .active_low = 0,
309 .default_trigger = "default-on",
310 },
311 };
312
313 static struct gpio_led_platform_data simpad_led_data = {
314 .num_leds = ARRAY_SIZE(simpad_leds),
315 .leds = simpad_leds,
316 };
317
318 static struct platform_device simpad_gpio_leds = {
319 .name = "leds-gpio",
320 .id = 0,
321 .dev = {
322 .platform_data = &simpad_led_data,
323 },
324 };
325
326 /*
327 * i2c
328 */
329 static struct gpiod_lookup_table simpad_i2c_gpiod_table = {
330 .dev_id = "i2c-gpio.0",
331 .table = {
332 GPIO_LOOKUP_IDX("gpio", 21, NULL, 0,
333 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
334 GPIO_LOOKUP_IDX("gpio", 25, NULL, 1,
335 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
336 },
337 };
338
339 static struct i2c_gpio_platform_data simpad_i2c_data = {
340 .udelay = 10,
341 .timeout = HZ,
342 };
343
344 static struct platform_device simpad_i2c = {
345 .name = "i2c-gpio",
346 .id = 0,
347 .dev = {
348 .platform_data = &simpad_i2c_data,
349 },
350 };
351
352 /*
353 * MediaQ Video Device
354 */
355 static struct platform_device simpad_mq200fb = {
356 .name = "simpad-mq200",
357 .id = 0,
358 };
359
360 static struct platform_device *devices[] __initdata = {
361 &simpad_keys,
362 &simpad_polled_keys,
363 &simpad_mq200fb,
364 &simpad_gpio_leds,
365 &simpad_i2c,
366 };
367
368 /* Compact Flash */
369 static struct gpiod_lookup_table simpad_cf_gpio_table = {
370 .dev_id = "sa11x0-pcmcia",
371 .table = {
372 GPIO_LOOKUP("gpio", GPIO_CF_IRQ, "cf-ready", GPIO_ACTIVE_HIGH),
373 GPIO_LOOKUP("gpio", GPIO_CF_CD, "cf-detect", GPIO_ACTIVE_HIGH),
374 { },
375 },
376 };
377
378
simpad_init(void)379 static int __init simpad_init(void)
380 {
381 int ret;
382
383 spin_lock_init(&cs3_lock);
384
385 cs3_gpio.label = "simpad_cs3";
386 cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
387 cs3_gpio.ngpio = 24;
388 cs3_gpio.set = cs3_gpio_set;
389 cs3_gpio.get = cs3_gpio_get;
390 cs3_gpio.direction_input = cs3_gpio_direction_input;
391 cs3_gpio.direction_output = cs3_gpio_direction_output;
392 ret = gpiochip_add_data(&cs3_gpio, NULL);
393 if (ret)
394 printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
395
396 pm_power_off = simpad_power_off;
397
398 sa11x0_register_pcmcia(-1, &simpad_cf_gpio_table);
399 sa11x0_ppc_configure_mcp();
400 sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
401 ARRAY_SIZE(simpad_flash_resources));
402 sa11x0_register_mcp(&simpad_mcp_data);
403
404 gpiod_add_lookup_table(&simpad_i2c_gpiod_table);
405 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
406 if(ret)
407 printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
408
409 return 0;
410 }
411
412 arch_initcall(simpad_init);
413
414
415 MACHINE_START(SIMPAD, "Simpad")
416 /* Maintainer: Holger Freyther */
417 .atag_offset = 0x100,
418 .map_io = simpad_map_io,
419 .nr_irqs = SA1100_NR_IRQS,
420 .init_irq = sa1100_init_irq,
421 .init_late = sa11x0_init_late,
422 .init_time = sa1100_timer_init,
423 .restart = sa11x0_restart,
424 MACHINE_END
425
