2 * linux/arch/arm/mach-sa1100/generic.c
4 * Author: Nicolas Pitre
6 * Code common to all SA11x0 machines.
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.
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
17 #include <linux/cpufreq.h>
18 #include <linux/ioport.h>
19 #include <linux/platform_device.h>
21 #include <asm/div64.h>
22 #include <mach/hardware.h>
23 #include <asm/system.h>
24 #include <asm/mach/map.h>
25 #include <asm/mach/flash.h>
31 unsigned int reset_status;
32 EXPORT_SYMBOL(reset_status);
37 * This table is setup for a 3.6864MHz Crystal.
39 static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
59 unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
65 for (i = 0; i < NR_FREQS; i++)
66 if (cclk_frequency_100khz[i] >= khz)
72 unsigned int sa11x0_ppcr_to_freq(unsigned int idx)
74 unsigned int freq = 0;
76 freq = cclk_frequency_100khz[idx] * 100;
81 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
82 * this platform, anyway.
84 int sa11x0_verify_speed(struct cpufreq_policy *policy)
90 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
92 /* make sure that at least one frequency is within the policy */
93 tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;
94 if (tmp > policy->max)
97 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
102 unsigned int sa11x0_getspeed(unsigned int cpu)
106 return cclk_frequency_100khz[PPCR & 0xf] * 100;
110 * Default power-off for SA1100
112 static void sa1100_power_off(void)
116 /* disable internal oscillator, float CS lines */
117 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
118 /* enable wake-up on GPIO0 (Assabet...) */
119 PWER = GFER = GRER = 1;
121 * set scratchpad to zero, just in case it is used as a
122 * restart address by the bootloader.
125 /* enter sleep mode */
129 static void sa11x0_register_device(struct platform_device *dev, void *data)
132 dev->dev.platform_data = data;
133 err = platform_device_register(dev);
135 printk(KERN_ERR "Unable to register device %s: %d\n",
140 static struct resource sa11x0udc_resources[] = {
142 .start = __PREG(Ser0UDCCR),
143 .end = __PREG(Ser0UDCCR) + 0xffff,
144 .flags = IORESOURCE_MEM,
147 .start = IRQ_Ser0UDC,
149 .flags = IORESOURCE_IRQ,
153 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
155 static struct platform_device sa11x0udc_device = {
156 .name = "sa11x0-udc",
159 .dma_mask = &sa11x0udc_dma_mask,
160 .coherent_dma_mask = 0xffffffff,
162 .num_resources = ARRAY_SIZE(sa11x0udc_resources),
163 .resource = sa11x0udc_resources,
166 static struct resource sa11x0uart1_resources[] = {
168 .start = __PREG(Ser1UTCR0),
169 .end = __PREG(Ser1UTCR0) + 0xffff,
170 .flags = IORESOURCE_MEM,
173 .start = IRQ_Ser1UART,
175 .flags = IORESOURCE_IRQ,
179 static struct platform_device sa11x0uart1_device = {
180 .name = "sa11x0-uart",
182 .num_resources = ARRAY_SIZE(sa11x0uart1_resources),
183 .resource = sa11x0uart1_resources,
186 static struct resource sa11x0uart3_resources[] = {
188 .start = __PREG(Ser3UTCR0),
189 .end = __PREG(Ser3UTCR0) + 0xffff,
190 .flags = IORESOURCE_MEM,
193 .start = IRQ_Ser3UART,
195 .flags = IORESOURCE_IRQ,
199 static struct platform_device sa11x0uart3_device = {
200 .name = "sa11x0-uart",
202 .num_resources = ARRAY_SIZE(sa11x0uart3_resources),
203 .resource = sa11x0uart3_resources,
206 static struct resource sa11x0mcp_resources[] = {
208 .start = __PREG(Ser4MCCR0),
209 .end = __PREG(Ser4MCCR0) + 0xffff,
210 .flags = IORESOURCE_MEM,
213 .start = IRQ_Ser4MCP,
215 .flags = IORESOURCE_IRQ,
219 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
221 static struct platform_device sa11x0mcp_device = {
222 .name = "sa11x0-mcp",
225 .dma_mask = &sa11x0mcp_dma_mask,
226 .coherent_dma_mask = 0xffffffff,
228 .num_resources = ARRAY_SIZE(sa11x0mcp_resources),
229 .resource = sa11x0mcp_resources,
232 void sa11x0_register_mcp(struct mcp_plat_data *data)
234 sa11x0_register_device(&sa11x0mcp_device, data);
237 static struct resource sa11x0ssp_resources[] = {
241 .flags = IORESOURCE_MEM,
244 .start = IRQ_Ser4SSP,
246 .flags = IORESOURCE_IRQ,
250 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
252 static struct platform_device sa11x0ssp_device = {
253 .name = "sa11x0-ssp",
256 .dma_mask = &sa11x0ssp_dma_mask,
257 .coherent_dma_mask = 0xffffffff,
259 .num_resources = ARRAY_SIZE(sa11x0ssp_resources),
260 .resource = sa11x0ssp_resources,
263 static struct resource sa11x0fb_resources[] = {
267 .flags = IORESOURCE_MEM,
272 .flags = IORESOURCE_IRQ,
276 static struct platform_device sa11x0fb_device = {
280 .coherent_dma_mask = 0xffffffff,
282 .num_resources = ARRAY_SIZE(sa11x0fb_resources),
283 .resource = sa11x0fb_resources,
286 static struct platform_device sa11x0pcmcia_device = {
287 .name = "sa11x0-pcmcia",
291 static struct platform_device sa11x0mtd_device = {
292 .name = "sa1100-mtd",
296 void sa11x0_register_mtd(struct flash_platform_data *flash,
297 struct resource *res, int nr)
299 flash->name = "sa1100";
300 sa11x0mtd_device.resource = res;
301 sa11x0mtd_device.num_resources = nr;
302 sa11x0_register_device(&sa11x0mtd_device, flash);
305 static struct resource sa11x0ir_resources[] = {
307 .start = __PREG(Ser2UTCR0),
308 .end = __PREG(Ser2UTCR0) + 0x24 - 1,
309 .flags = IORESOURCE_MEM,
311 .start = __PREG(Ser2HSCR0),
312 .end = __PREG(Ser2HSCR0) + 0x1c - 1,
313 .flags = IORESOURCE_MEM,
315 .start = __PREG(Ser2HSCR2),
316 .end = __PREG(Ser2HSCR2) + 0x04 - 1,
317 .flags = IORESOURCE_MEM,
319 .start = IRQ_Ser2ICP,
321 .flags = IORESOURCE_IRQ,
325 static struct platform_device sa11x0ir_device = {
328 .num_resources = ARRAY_SIZE(sa11x0ir_resources),
329 .resource = sa11x0ir_resources,
332 void sa11x0_register_irda(struct irda_platform_data *irda)
334 sa11x0_register_device(&sa11x0ir_device, irda);
337 static struct platform_device sa11x0rtc_device = {
338 .name = "sa1100-rtc",
342 static struct platform_device *sa11x0_devices[] __initdata = {
347 &sa11x0pcmcia_device,
352 static int __init sa1100_init(void)
354 pm_power_off = sa1100_power_off;
355 return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
358 arch_initcall(sa1100_init);
360 void (*sa1100fb_backlight_power)(int on);
361 void (*sa1100fb_lcd_power)(int on);
363 EXPORT_SYMBOL(sa1100fb_backlight_power);
364 EXPORT_SYMBOL(sa1100fb_lcd_power);
368 * Common I/O mapping:
370 * Typically, static virtual address mappings are as follow:
372 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
373 * 0xf4000000-0xf4ffffff: SA-1111
374 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
375 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
376 * 0xffff0000-0xffff0fff: SA1100 exception vectors
377 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
379 * Below 0xe8000000 is reserved for vm allocation.
381 * The machine specific code must provide the extra mapping beside the
382 * default mapping provided here.
385 static struct map_desc standard_io_desc[] __initdata = {
387 .virtual = 0xf8000000,
388 .pfn = __phys_to_pfn(0x80000000),
389 .length = 0x00100000,
392 .virtual = 0xfa000000,
393 .pfn = __phys_to_pfn(0x90000000),
394 .length = 0x00100000,
397 .virtual = 0xfc000000,
398 .pfn = __phys_to_pfn(0xa0000000),
399 .length = 0x00100000,
402 .virtual = 0xfe000000,
403 .pfn = __phys_to_pfn(0xb0000000),
404 .length = 0x00200000,
409 void __init sa1100_map_io(void)
411 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
415 * Disable the memory bus request/grant signals on the SA1110 to
416 * ensure that we don't receive spurious memory requests. We set
417 * the MBGNT signal false to ensure the SA1111 doesn't own the
420 void __init sa1110_mb_disable(void)
424 local_irq_save(flags);
428 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
430 GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
432 local_irq_restore(flags);
436 * If the system is going to use the SA-1111 DMA engines, set up
437 * the memory bus request/grant pins.
439 void __devinit sa1110_mb_enable(void)
443 local_irq_save(flags);
447 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
449 GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
452 local_irq_restore(flags);