GNU Linux-libre 4.19.264-gnu1
[releases.git] / arch / arm / mach-sa1100 / generic.c
1 /*
2  * linux/arch/arm/mach-sa1100/generic.c
3  *
4  * Author: Nicolas Pitre
5  *
6  * Code common to all SA11x0 machines.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 #include <linux/gpio.h>
13 #include <linux/gpio/machine.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/pm.h>
20 #include <linux/cpufreq.h>
21 #include <linux/ioport.h>
22 #include <linux/platform_device.h>
23 #include <linux/reboot.h>
24 #include <linux/regulator/fixed.h>
25 #include <linux/regulator/machine.h>
26 #include <linux/irqchip/irq-sa11x0.h>
27
28 #include <video/sa1100fb.h>
29
30 #include <soc/sa1100/pwer.h>
31
32 #include <asm/div64.h>
33 #include <asm/mach/map.h>
34 #include <asm/mach/flash.h>
35 #include <asm/irq.h>
36 #include <asm/system_misc.h>
37
38 #include <mach/hardware.h>
39 #include <mach/irqs.h>
40 #include <mach/reset.h>
41
42 #include "generic.h"
43 #include <clocksource/pxa.h>
44
45 unsigned int reset_status;
46 EXPORT_SYMBOL(reset_status);
47
48 #define NR_FREQS        16
49
50 /*
51  * This table is setup for a 3.6864MHz Crystal.
52  */
53 struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = {
54         { .frequency = 59000,   /*  59.0 MHz */},
55         { .frequency = 73700,   /*  73.7 MHz */},
56         { .frequency = 88500,   /*  88.5 MHz */},
57         { .frequency = 103200,  /* 103.2 MHz */},
58         { .frequency = 118000,  /* 118.0 MHz */},
59         { .frequency = 132700,  /* 132.7 MHz */},
60         { .frequency = 147500,  /* 147.5 MHz */},
61         { .frequency = 162200,  /* 162.2 MHz */},
62         { .frequency = 176900,  /* 176.9 MHz */},
63         { .frequency = 191700,  /* 191.7 MHz */},
64         { .frequency = 206400,  /* 206.4 MHz */},
65         { .frequency = 221200,  /* 221.2 MHz */},
66         { .frequency = 235900,  /* 235.9 MHz */},
67         { .frequency = 250700,  /* 250.7 MHz */},
68         { .frequency = 265400,  /* 265.4 MHz */},
69         { .frequency = 280200,  /* 280.2 MHz */},
70         { .frequency = CPUFREQ_TABLE_END, },
71 };
72
73 unsigned int sa11x0_getspeed(unsigned int cpu)
74 {
75         if (cpu)
76                 return 0;
77         return sa11x0_freq_table[PPCR & 0xf].frequency;
78 }
79
80 /*
81  * Default power-off for SA1100
82  */
83 static void sa1100_power_off(void)
84 {
85         mdelay(100);
86         local_irq_disable();
87         /* disable internal oscillator, float CS lines */
88         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
89         /* enable wake-up on GPIO0 (Assabet...) */
90         PWER = GFER = GRER = 1;
91         /*
92          * set scratchpad to zero, just in case it is used as a
93          * restart address by the bootloader.
94          */
95         PSPR = 0;
96         /* enter sleep mode */
97         PMCR = PMCR_SF;
98 }
99
100 void sa11x0_restart(enum reboot_mode mode, const char *cmd)
101 {
102         clear_reset_status(RESET_STATUS_ALL);
103
104         if (mode == REBOOT_SOFT) {
105                 /* Jump into ROM at address 0 */
106                 soft_restart(0);
107         } else {
108                 /* Use on-chip reset capability */
109                 RSRR = RSRR_SWR;
110         }
111 }
112
113 static void sa11x0_register_device(struct platform_device *dev, void *data)
114 {
115         int err;
116         dev->dev.platform_data = data;
117         err = platform_device_register(dev);
118         if (err)
119                 printk(KERN_ERR "Unable to register device %s: %d\n",
120                         dev->name, err);
121 }
122
123
124 static struct resource sa11x0udc_resources[] = {
125         [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K),
126         [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC),
127 };
128
129 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
130
131 static struct platform_device sa11x0udc_device = {
132         .name           = "sa11x0-udc",
133         .id             = -1,
134         .dev            = {
135                 .dma_mask = &sa11x0udc_dma_mask,
136                 .coherent_dma_mask = 0xffffffff,
137         },
138         .num_resources  = ARRAY_SIZE(sa11x0udc_resources),
139         .resource       = sa11x0udc_resources,
140 };
141
142 static struct resource sa11x0uart1_resources[] = {
143         [0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K),
144         [1] = DEFINE_RES_IRQ(IRQ_Ser1UART),
145 };
146
147 static struct platform_device sa11x0uart1_device = {
148         .name           = "sa11x0-uart",
149         .id             = 1,
150         .num_resources  = ARRAY_SIZE(sa11x0uart1_resources),
151         .resource       = sa11x0uart1_resources,
152 };
153
154 static struct resource sa11x0uart3_resources[] = {
155         [0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K),
156         [1] = DEFINE_RES_IRQ(IRQ_Ser3UART),
157 };
158
159 static struct platform_device sa11x0uart3_device = {
160         .name           = "sa11x0-uart",
161         .id             = 3,
162         .num_resources  = ARRAY_SIZE(sa11x0uart3_resources),
163         .resource       = sa11x0uart3_resources,
164 };
165
166 static struct resource sa11x0mcp_resources[] = {
167         [0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K),
168         [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4),
169         [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP),
170 };
171
172 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
173
174 static struct platform_device sa11x0mcp_device = {
175         .name           = "sa11x0-mcp",
176         .id             = -1,
177         .dev = {
178                 .dma_mask = &sa11x0mcp_dma_mask,
179                 .coherent_dma_mask = 0xffffffff,
180         },
181         .num_resources  = ARRAY_SIZE(sa11x0mcp_resources),
182         .resource       = sa11x0mcp_resources,
183 };
184
185 void __init sa11x0_ppc_configure_mcp(void)
186 {
187         /* Setup the PPC unit for the MCP */
188         PPDR &= ~PPC_RXD4;
189         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
190         PSDR |= PPC_RXD4;
191         PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
192         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
193 }
194
195 void sa11x0_register_mcp(struct mcp_plat_data *data)
196 {
197         sa11x0_register_device(&sa11x0mcp_device, data);
198 }
199
200 static struct resource sa11x0ssp_resources[] = {
201         [0] = DEFINE_RES_MEM(0x80070000, SZ_64K),
202         [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP),
203 };
204
205 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
206
207 static struct platform_device sa11x0ssp_device = {
208         .name           = "sa11x0-ssp",
209         .id             = -1,
210         .dev = {
211                 .dma_mask = &sa11x0ssp_dma_mask,
212                 .coherent_dma_mask = 0xffffffff,
213         },
214         .num_resources  = ARRAY_SIZE(sa11x0ssp_resources),
215         .resource       = sa11x0ssp_resources,
216 };
217
218 static struct resource sa11x0fb_resources[] = {
219         [0] = DEFINE_RES_MEM(0xb0100000, SZ_64K),
220         [1] = DEFINE_RES_IRQ(IRQ_LCD),
221 };
222
223 static struct platform_device sa11x0fb_device = {
224         .name           = "sa11x0-fb",
225         .id             = -1,
226         .dev = {
227                 .coherent_dma_mask = 0xffffffff,
228         },
229         .num_resources  = ARRAY_SIZE(sa11x0fb_resources),
230         .resource       = sa11x0fb_resources,
231 };
232
233 void sa11x0_register_lcd(struct sa1100fb_mach_info *inf)
234 {
235         sa11x0_register_device(&sa11x0fb_device, inf);
236 }
237
238 static bool sa11x0pcmcia_legacy = true;
239 static struct platform_device sa11x0pcmcia_device = {
240         .name           = "sa11x0-pcmcia",
241         .id             = -1,
242 };
243
244 void sa11x0_register_pcmcia(int socket, struct gpiod_lookup_table *table)
245 {
246         if (table)
247                 gpiod_add_lookup_table(table);
248         platform_device_register_simple("sa11x0-pcmcia", socket, NULL, 0);
249         sa11x0pcmcia_legacy = false;
250 }
251
252 static struct platform_device sa11x0mtd_device = {
253         .name           = "sa1100-mtd",
254         .id             = -1,
255 };
256
257 void sa11x0_register_mtd(struct flash_platform_data *flash,
258                          struct resource *res, int nr)
259 {
260         flash->name = "sa1100";
261         sa11x0mtd_device.resource = res;
262         sa11x0mtd_device.num_resources = nr;
263         sa11x0_register_device(&sa11x0mtd_device, flash);
264 }
265
266 static struct resource sa11x0ir_resources[] = {
267         DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24),
268         DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c),
269         DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04),
270         DEFINE_RES_IRQ(IRQ_Ser2ICP),
271 };
272
273 static struct platform_device sa11x0ir_device = {
274         .name           = "sa11x0-ir",
275         .id             = -1,
276         .num_resources  = ARRAY_SIZE(sa11x0ir_resources),
277         .resource       = sa11x0ir_resources,
278 };
279
280 void sa11x0_register_irda(struct irda_platform_data *irda)
281 {
282         sa11x0_register_device(&sa11x0ir_device, irda);
283 }
284
285 static struct resource sa1100_rtc_resources[] = {
286         DEFINE_RES_MEM(0x90010000, 0x40),
287         DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),
288         DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),
289 };
290
291 static struct platform_device sa11x0rtc_device = {
292         .name           = "sa1100-rtc",
293         .id             = -1,
294         .num_resources  = ARRAY_SIZE(sa1100_rtc_resources),
295         .resource       = sa1100_rtc_resources,
296 };
297
298 static struct resource sa11x0dma_resources[] = {
299         DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE),
300         DEFINE_RES_IRQ(IRQ_DMA0),
301         DEFINE_RES_IRQ(IRQ_DMA1),
302         DEFINE_RES_IRQ(IRQ_DMA2),
303         DEFINE_RES_IRQ(IRQ_DMA3),
304         DEFINE_RES_IRQ(IRQ_DMA4),
305         DEFINE_RES_IRQ(IRQ_DMA5),
306 };
307
308 static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32);
309
310 static struct platform_device sa11x0dma_device = {
311         .name           = "sa11x0-dma",
312         .id             = -1,
313         .dev = {
314                 .dma_mask = &sa11x0dma_dma_mask,
315                 .coherent_dma_mask = 0xffffffff,
316         },
317         .num_resources  = ARRAY_SIZE(sa11x0dma_resources),
318         .resource       = sa11x0dma_resources,
319 };
320
321 static struct platform_device *sa11x0_devices[] __initdata = {
322         &sa11x0udc_device,
323         &sa11x0uart1_device,
324         &sa11x0uart3_device,
325         &sa11x0ssp_device,
326         &sa11x0rtc_device,
327         &sa11x0dma_device,
328 };
329
330 static int __init sa1100_init(void)
331 {
332         pm_power_off = sa1100_power_off;
333
334         if (sa11x0pcmcia_legacy)
335                 platform_device_register(&sa11x0pcmcia_device);
336
337         regulator_has_full_constraints();
338
339         return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
340 }
341
342 arch_initcall(sa1100_init);
343
344 void __init sa11x0_init_late(void)
345 {
346         sa11x0_pm_init();
347 }
348
349 int __init sa11x0_register_fixed_regulator(int n,
350         struct fixed_voltage_config *cfg,
351         struct regulator_consumer_supply *supplies, unsigned num_supplies)
352 {
353         struct regulator_init_data *id;
354
355         cfg->init_data = id = kzalloc(sizeof(*cfg->init_data), GFP_KERNEL);
356         if (!cfg->init_data)
357                 return -ENOMEM;
358
359         if (cfg->gpio < 0)
360                 id->constraints.always_on = 1;
361         id->constraints.name = cfg->supply_name;
362         id->constraints.min_uV = cfg->microvolts;
363         id->constraints.max_uV = cfg->microvolts;
364         id->constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
365         id->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
366         id->consumer_supplies = supplies;
367         id->num_consumer_supplies = num_supplies;
368
369         platform_device_register_resndata(NULL, "reg-fixed-voltage", n,
370                                           NULL, 0, cfg, sizeof(*cfg));
371         return 0;
372 }
373
374 /*
375  * Common I/O mapping:
376  *
377  * Typically, static virtual address mappings are as follow:
378  *
379  * 0xf0000000-0xf3ffffff:       miscellaneous stuff (CPLDs, etc.)
380  * 0xf4000000-0xf4ffffff:       SA-1111
381  * 0xf5000000-0xf5ffffff:       reserved (used by cache flushing area)
382  * 0xf6000000-0xfffeffff:       reserved (internal SA1100 IO defined above)
383  * 0xffff0000-0xffff0fff:       SA1100 exception vectors
384  * 0xffff2000-0xffff2fff:       Minicache copy_user_page area
385  *
386  * Below 0xe8000000 is reserved for vm allocation.
387  *
388  * The machine specific code must provide the extra mapping beside the
389  * default mapping provided here.
390  */
391
392 static struct map_desc standard_io_desc[] __initdata = {
393         {       /* PCM */
394                 .virtual        =  0xf8000000,
395                 .pfn            = __phys_to_pfn(0x80000000),
396                 .length         = 0x00100000,
397                 .type           = MT_DEVICE
398         }, {    /* SCM */
399                 .virtual        =  0xfa000000,
400                 .pfn            = __phys_to_pfn(0x90000000),
401                 .length         = 0x00100000,
402                 .type           = MT_DEVICE
403         }, {    /* MER */
404                 .virtual        =  0xfc000000,
405                 .pfn            = __phys_to_pfn(0xa0000000),
406                 .length         = 0x00100000,
407                 .type           = MT_DEVICE
408         }, {    /* LCD + DMA */
409                 .virtual        =  0xfe000000,
410                 .pfn            = __phys_to_pfn(0xb0000000),
411                 .length         = 0x00200000,
412                 .type           = MT_DEVICE
413         },
414 };
415
416 void __init sa1100_map_io(void)
417 {
418         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
419 }
420
421 void __init sa1100_timer_init(void)
422 {
423         pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000));
424 }
425
426 static struct resource irq_resource =
427         DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
428
429 void __init sa1100_init_irq(void)
430 {
431         request_resource(&iomem_resource, &irq_resource);
432
433         sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start);
434
435         sa1100_init_gpio();
436         sa11xx_clk_init();
437 }
438
439 /*
440  * Disable the memory bus request/grant signals on the SA1110 to
441  * ensure that we don't receive spurious memory requests.  We set
442  * the MBGNT signal false to ensure the SA1111 doesn't own the
443  * SDRAM bus.
444  */
445 void sa1110_mb_disable(void)
446 {
447         unsigned long flags;
448
449         local_irq_save(flags);
450         
451         PGSR &= ~GPIO_MBGNT;
452         GPCR = GPIO_MBGNT;
453         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
454
455         GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
456
457         local_irq_restore(flags);
458 }
459
460 /*
461  * If the system is going to use the SA-1111 DMA engines, set up
462  * the memory bus request/grant pins.
463  */
464 void sa1110_mb_enable(void)
465 {
466         unsigned long flags;
467
468         local_irq_save(flags);
469
470         PGSR &= ~GPIO_MBGNT;
471         GPCR = GPIO_MBGNT;
472         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
473
474         GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
475         TUCR |= TUCR_MR;
476
477         local_irq_restore(flags);
478 }
479
480 int sa11x0_gpio_set_wake(unsigned int gpio, unsigned int on)
481 {
482         if (on)
483                 PWER |= BIT(gpio);
484         else
485                 PWER &= ~BIT(gpio);
486
487         return 0;
488 }
489
490 int sa11x0_sc_set_wake(unsigned int irq, unsigned int on)
491 {
492         if (BIT(irq) != IC_RTCAlrm)
493                 return -EINVAL;
494
495         if (on)
496                 PWER |= PWER_RTC;
497         else
498                 PWER &= ~PWER_RTC;
499
500         return 0;
501 }