1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * linux/arch/arm/mach-sa1100/generic.c
4  *
5  * Author: Nicolas Pitre
6  *
7  * Code common to all SA11x0 machines.
8  */
9 #include <linux/gpio.h>
10 #include <linux/gpio/machine.h>
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/delay.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/pm.h>
17 #include <linux/cpufreq.h>
18 #include <linux/ioport.h>
19 #include <linux/platform_device.h>
20 #include <linux/reboot.h>
21 #include <linux/regulator/fixed.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/irqchip/irq-sa11x0.h>
24 
25 #include <video/sa1100fb.h>
26 
27 #include <soc/sa1100/pwer.h>
28 
29 #include <asm/div64.h>
30 #include <asm/mach/map.h>
31 #include <asm/mach/flash.h>
32 #include <asm/irq.h>
33 #include <asm/system_misc.h>
34 
35 #include <mach/hardware.h>
36 #include <mach/irqs.h>
37 #include <mach/reset.h>
38 
39 #include "generic.h"
40 #include <clocksource/pxa.h>
41 
42 #define NR_FREQS	16
43 
44 /*
45  * This table is setup for a 3.6864MHz Crystal.
46  */
47 struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = {
48 	{ .frequency = 59000,	/*  59.0 MHz */},
49 	{ .frequency = 73700,	/*  73.7 MHz */},
50 	{ .frequency = 88500,	/*  88.5 MHz */},
51 	{ .frequency = 103200,	/* 103.2 MHz */},
52 	{ .frequency = 118000,	/* 118.0 MHz */},
53 	{ .frequency = 132700,	/* 132.7 MHz */},
54 	{ .frequency = 147500,	/* 147.5 MHz */},
55 	{ .frequency = 162200,	/* 162.2 MHz */},
56 	{ .frequency = 176900,	/* 176.9 MHz */},
57 	{ .frequency = 191700,	/* 191.7 MHz */},
58 	{ .frequency = 206400,	/* 206.4 MHz */},
59 	{ .frequency = 221200,	/* 221.2 MHz */},
60 	{ .frequency = 235900,	/* 235.9 MHz */},
61 	{ .frequency = 250700,	/* 250.7 MHz */},
62 	{ .frequency = 265400,	/* 265.4 MHz */},
63 	{ .frequency = 280200,	/* 280.2 MHz */},
64 	{ .frequency = CPUFREQ_TABLE_END, },
65 };
66 
sa11x0_getspeed(unsigned int cpu)67 unsigned int sa11x0_getspeed(unsigned int cpu)
68 {
69 	if (cpu)
70 		return 0;
71 	return sa11x0_freq_table[PPCR & 0xf].frequency;
72 }
73 
74 /*
75  * Default power-off for SA1100
76  */
sa1100_power_off(void)77 static void sa1100_power_off(void)
78 {
79 	mdelay(100);
80 	local_irq_disable();
81 	/* disable internal oscillator, float CS lines */
82 	PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
83 	/* enable wake-up on GPIO0 (Assabet...) */
84 	PWER = GFER = GRER = 1;
85 	/*
86 	 * set scratchpad to zero, just in case it is used as a
87 	 * restart address by the bootloader.
88 	 */
89 	PSPR = 0;
90 	/* enter sleep mode */
91 	PMCR = PMCR_SF;
92 }
93 
sa11x0_restart(enum reboot_mode mode,const char * cmd)94 void sa11x0_restart(enum reboot_mode mode, const char *cmd)
95 {
96 	clear_reset_status(RESET_STATUS_ALL);
97 
98 	if (mode == REBOOT_SOFT) {
99 		/* Jump into ROM at address 0 */
100 		soft_restart(0);
101 	} else {
102 		/* Use on-chip reset capability */
103 		RSRR = RSRR_SWR;
104 	}
105 }
106 
sa11x0_register_device(struct platform_device * dev,void * data)107 static void sa11x0_register_device(struct platform_device *dev, void *data)
108 {
109 	int err;
110 	dev->dev.platform_data = data;
111 	err = platform_device_register(dev);
112 	if (err)
113 		printk(KERN_ERR "Unable to register device %s: %d\n",
114 			dev->name, err);
115 }
116 
117 
118 static struct resource sa11x0udc_resources[] = {
119 	[0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K),
120 	[1] = DEFINE_RES_IRQ(IRQ_Ser0UDC),
121 };
122 
123 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
124 
125 static struct platform_device sa11x0udc_device = {
126 	.name		= "sa11x0-udc",
127 	.id		= -1,
128 	.dev		= {
129 		.dma_mask = &sa11x0udc_dma_mask,
130 		.coherent_dma_mask = 0xffffffff,
131 	},
132 	.num_resources	= ARRAY_SIZE(sa11x0udc_resources),
133 	.resource	= sa11x0udc_resources,
134 };
135 
136 static struct resource sa11x0uart1_resources[] = {
137 	[0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K),
138 	[1] = DEFINE_RES_IRQ(IRQ_Ser1UART),
139 };
140 
141 static struct platform_device sa11x0uart1_device = {
142 	.name		= "sa11x0-uart",
143 	.id		= 1,
144 	.num_resources	= ARRAY_SIZE(sa11x0uart1_resources),
145 	.resource	= sa11x0uart1_resources,
146 };
147 
148 static struct resource sa11x0uart3_resources[] = {
149 	[0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K),
150 	[1] = DEFINE_RES_IRQ(IRQ_Ser3UART),
151 };
152 
153 static struct platform_device sa11x0uart3_device = {
154 	.name		= "sa11x0-uart",
155 	.id		= 3,
156 	.num_resources	= ARRAY_SIZE(sa11x0uart3_resources),
157 	.resource	= sa11x0uart3_resources,
158 };
159 
160 static struct resource sa11x0mcp_resources[] = {
161 	[0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K),
162 	[1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4),
163 	[2] = DEFINE_RES_IRQ(IRQ_Ser4MCP),
164 };
165 
166 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
167 
168 static struct platform_device sa11x0mcp_device = {
169 	.name		= "sa11x0-mcp",
170 	.id		= -1,
171 	.dev = {
172 		.dma_mask = &sa11x0mcp_dma_mask,
173 		.coherent_dma_mask = 0xffffffff,
174 	},
175 	.num_resources	= ARRAY_SIZE(sa11x0mcp_resources),
176 	.resource	= sa11x0mcp_resources,
177 };
178 
sa11x0_ppc_configure_mcp(void)179 void __init sa11x0_ppc_configure_mcp(void)
180 {
181 	/* Setup the PPC unit for the MCP */
182 	PPDR &= ~PPC_RXD4;
183 	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
184 	PSDR |= PPC_RXD4;
185 	PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
186 	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
187 }
188 
sa11x0_register_mcp(struct mcp_plat_data * data)189 void sa11x0_register_mcp(struct mcp_plat_data *data)
190 {
191 	sa11x0_register_device(&sa11x0mcp_device, data);
192 }
193 
194 static struct resource sa11x0ssp_resources[] = {
195 	[0] = DEFINE_RES_MEM(0x80070000, SZ_64K),
196 	[1] = DEFINE_RES_IRQ(IRQ_Ser4SSP),
197 };
198 
199 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
200 
201 static struct platform_device sa11x0ssp_device = {
202 	.name		= "sa11x0-ssp",
203 	.id		= -1,
204 	.dev = {
205 		.dma_mask = &sa11x0ssp_dma_mask,
206 		.coherent_dma_mask = 0xffffffff,
207 	},
208 	.num_resources	= ARRAY_SIZE(sa11x0ssp_resources),
209 	.resource	= sa11x0ssp_resources,
210 };
211 
212 static struct resource sa11x0fb_resources[] = {
213 	[0] = DEFINE_RES_MEM(0xb0100000, SZ_64K),
214 	[1] = DEFINE_RES_IRQ(IRQ_LCD),
215 };
216 
217 static struct platform_device sa11x0fb_device = {
218 	.name		= "sa11x0-fb",
219 	.id		= -1,
220 	.dev = {
221 		.coherent_dma_mask = 0xffffffff,
222 	},
223 	.num_resources	= ARRAY_SIZE(sa11x0fb_resources),
224 	.resource	= sa11x0fb_resources,
225 };
226 
sa11x0_register_lcd(struct sa1100fb_mach_info * inf)227 void sa11x0_register_lcd(struct sa1100fb_mach_info *inf)
228 {
229 	sa11x0_register_device(&sa11x0fb_device, inf);
230 }
231 
sa11x0_register_pcmcia(int socket,struct gpiod_lookup_table * table)232 void sa11x0_register_pcmcia(int socket, struct gpiod_lookup_table *table)
233 {
234 	if (table)
235 		gpiod_add_lookup_table(table);
236 	platform_device_register_simple("sa11x0-pcmcia", socket, NULL, 0);
237 }
238 
239 static struct platform_device sa11x0mtd_device = {
240 	.name		= "sa1100-mtd",
241 	.id		= -1,
242 };
243 
sa11x0_register_mtd(struct flash_platform_data * flash,struct resource * res,int nr)244 void sa11x0_register_mtd(struct flash_platform_data *flash,
245 			 struct resource *res, int nr)
246 {
247 	flash->name = "sa1100";
248 	sa11x0mtd_device.resource = res;
249 	sa11x0mtd_device.num_resources = nr;
250 	sa11x0_register_device(&sa11x0mtd_device, flash);
251 }
252 
253 static struct resource sa1100_rtc_resources[] = {
254 	DEFINE_RES_MEM(0x90010000, 0x40),
255 	DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),
256 	DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),
257 };
258 
259 static struct platform_device sa11x0rtc_device = {
260 	.name		= "sa1100-rtc",
261 	.id		= -1,
262 	.num_resources	= ARRAY_SIZE(sa1100_rtc_resources),
263 	.resource	= sa1100_rtc_resources,
264 };
265 
266 static struct resource sa11x0dma_resources[] = {
267 	DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE),
268 	DEFINE_RES_IRQ(IRQ_DMA0),
269 	DEFINE_RES_IRQ(IRQ_DMA1),
270 	DEFINE_RES_IRQ(IRQ_DMA2),
271 	DEFINE_RES_IRQ(IRQ_DMA3),
272 	DEFINE_RES_IRQ(IRQ_DMA4),
273 	DEFINE_RES_IRQ(IRQ_DMA5),
274 };
275 
276 static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32);
277 
278 static struct platform_device sa11x0dma_device = {
279 	.name		= "sa11x0-dma",
280 	.id		= -1,
281 	.dev = {
282 		.dma_mask = &sa11x0dma_dma_mask,
283 		.coherent_dma_mask = 0xffffffff,
284 	},
285 	.num_resources	= ARRAY_SIZE(sa11x0dma_resources),
286 	.resource	= sa11x0dma_resources,
287 };
288 
289 static struct platform_device *sa11x0_devices[] __initdata = {
290 	&sa11x0udc_device,
291 	&sa11x0uart1_device,
292 	&sa11x0uart3_device,
293 	&sa11x0ssp_device,
294 	&sa11x0rtc_device,
295 	&sa11x0dma_device,
296 };
297 
sa1100_init(void)298 static int __init sa1100_init(void)
299 {
300 	struct resource wdt_res = DEFINE_RES_MEM(0x90000000, 0x20);
301 	pm_power_off = sa1100_power_off;
302 
303 	regulator_has_full_constraints();
304 
305 	platform_device_register_simple("sa1100_wdt", -1, &wdt_res, 1);
306 
307 	return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
308 }
309 
310 arch_initcall(sa1100_init);
311 
sa11x0_init_late(void)312 void __init sa11x0_init_late(void)
313 {
314 	sa11x0_pm_init();
315 }
316 
sa11x0_register_fixed_regulator(int n,struct fixed_voltage_config * cfg,struct regulator_consumer_supply * supplies,unsigned num_supplies,bool uses_gpio)317 int __init sa11x0_register_fixed_regulator(int n,
318 	struct fixed_voltage_config *cfg,
319 	struct regulator_consumer_supply *supplies, unsigned num_supplies,
320 	bool uses_gpio)
321 {
322 	struct regulator_init_data *id;
323 
324 	cfg->init_data = id = kzalloc(sizeof(*cfg->init_data), GFP_KERNEL);
325 	if (!cfg->init_data)
326 		return -ENOMEM;
327 
328 	if (!uses_gpio)
329 		id->constraints.always_on = 1;
330 	id->constraints.name = cfg->supply_name;
331 	id->constraints.min_uV = cfg->microvolts;
332 	id->constraints.max_uV = cfg->microvolts;
333 	id->constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
334 	id->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
335 	id->consumer_supplies = supplies;
336 	id->num_consumer_supplies = num_supplies;
337 
338 	platform_device_register_resndata(NULL, "reg-fixed-voltage", n,
339 					  NULL, 0, cfg, sizeof(*cfg));
340 	return 0;
341 }
342 
343 /*
344  * Common I/O mapping:
345  *
346  * Typically, static virtual address mappings are as follow:
347  *
348  * 0xf0000000-0xf3ffffff:	miscellaneous stuff (CPLDs, etc.)
349  * 0xf4000000-0xf4ffffff:	SA-1111
350  * 0xf5000000-0xf5ffffff:	reserved (used by cache flushing area)
351  * 0xf6000000-0xfffeffff:	reserved (internal SA1100 IO defined above)
352  * 0xffff0000-0xffff0fff:	SA1100 exception vectors
353  * 0xffff2000-0xffff2fff:	Minicache copy_user_page area
354  *
355  * Below 0xe8000000 is reserved for vm allocation.
356  *
357  * The machine specific code must provide the extra mapping beside the
358  * default mapping provided here.
359  */
360 
361 static struct map_desc standard_io_desc[] __initdata = {
362 	{	/* PCM */
363 		.virtual	=  0xf8000000,
364 		.pfn		= __phys_to_pfn(0x80000000),
365 		.length		= 0x00100000,
366 		.type		= MT_DEVICE
367 	}, {	/* SCM */
368 		.virtual	=  0xfa000000,
369 		.pfn		= __phys_to_pfn(0x90000000),
370 		.length		= 0x00100000,
371 		.type		= MT_DEVICE
372 	}, {	/* MER */
373 		.virtual	=  0xfc000000,
374 		.pfn		= __phys_to_pfn(0xa0000000),
375 		.length		= 0x00100000,
376 		.type		= MT_DEVICE
377 	}, {	/* LCD + DMA */
378 		.virtual	=  0xfe000000,
379 		.pfn		= __phys_to_pfn(0xb0000000),
380 		.length		= 0x00200000,
381 		.type		= MT_DEVICE
382 	},
383 };
384 
sa1100_map_io(void)385 void __init sa1100_map_io(void)
386 {
387 	iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
388 }
389 
sa1100_timer_init(void)390 void __init sa1100_timer_init(void)
391 {
392 	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000));
393 }
394 
395 static struct resource irq_resource =
396 	DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
397 
sa1100_init_irq(void)398 void __init sa1100_init_irq(void)
399 {
400 	request_resource(&iomem_resource, &irq_resource);
401 
402 	sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start);
403 
404 	sa1100_init_gpio();
405 	sa11xx_clk_init();
406 }
407 
408 /*
409  * Disable the memory bus request/grant signals on the SA1110 to
410  * ensure that we don't receive spurious memory requests.  We set
411  * the MBGNT signal false to ensure the SA1111 doesn't own the
412  * SDRAM bus.
413  */
sa1110_mb_disable(void)414 void sa1110_mb_disable(void)
415 {
416 	unsigned long flags;
417 
418 	local_irq_save(flags);
419 
420 	PGSR &= ~GPIO_MBGNT;
421 	GPCR = GPIO_MBGNT;
422 	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
423 
424 	GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
425 
426 	local_irq_restore(flags);
427 }
428 
429 /*
430  * If the system is going to use the SA-1111 DMA engines, set up
431  * the memory bus request/grant pins.
432  */
sa1110_mb_enable(void)433 void sa1110_mb_enable(void)
434 {
435 	unsigned long flags;
436 
437 	local_irq_save(flags);
438 
439 	PGSR &= ~GPIO_MBGNT;
440 	GPCR = GPIO_MBGNT;
441 	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
442 
443 	GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
444 	TUCR |= TUCR_MR;
445 
446 	local_irq_restore(flags);
447 }
448 
sa11x0_gpio_set_wake(unsigned int gpio,unsigned int on)449 int sa11x0_gpio_set_wake(unsigned int gpio, unsigned int on)
450 {
451 	if (on)
452 		PWER |= BIT(gpio);
453 	else
454 		PWER &= ~BIT(gpio);
455 
456 	return 0;
457 }
458 
sa11x0_sc_set_wake(unsigned int irq,unsigned int on)459 int sa11x0_sc_set_wake(unsigned int irq, unsigned int on)
460 {
461 	if (BIT(irq) != IC_RTCAlrm)
462 		return -EINVAL;
463 
464 	if (on)
465 		PWER |= PWER_RTC;
466 	else
467 		PWER &= ~PWER_RTC;
468 
469 	return 0;
470 }
471