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/pgtable.h>
25 #include <asm/mach/map.h>
26 #include <asm/mach/flash.h>
32 unsigned int reset_status;
33 EXPORT_SYMBOL(reset_status);
38 * This table is setup for a 3.6864MHz Crystal.
40 static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
60 unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
66 for (i = 0; i < NR_FREQS; i++)
67 if (cclk_frequency_100khz[i] >= khz)
73 unsigned int sa11x0_ppcr_to_freq(unsigned int idx)
75 unsigned int freq = 0;
77 freq = cclk_frequency_100khz[idx] * 100;
82 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
83 * this platform, anyway.
85 int sa11x0_verify_speed(struct cpufreq_policy *policy)
91 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
93 /* make sure that at least one frequency is within the policy */
94 tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;
95 if (tmp > policy->max)
98 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
103 unsigned int sa11x0_getspeed(unsigned int cpu)
107 return cclk_frequency_100khz[PPCR & 0xf] * 100;
111 * Default power-off for SA1100
113 static void sa1100_power_off(void)
117 /* disable internal oscillator, float CS lines */
118 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
119 /* enable wake-up on GPIO0 (Assabet...) */
120 PWER = GFER = GRER = 1;
122 * set scratchpad to zero, just in case it is used as a
123 * restart address by the bootloader.
126 /* enter sleep mode */
130 static void sa11x0_register_device(struct platform_device *dev, void *data)
133 dev->dev.platform_data = data;
134 err = platform_device_register(dev);
136 printk(KERN_ERR "Unable to register device %s: %d\n",
141 static struct resource sa11x0udc_resources[] = {
143 .start = __PREG(Ser0UDCCR),
144 .end = __PREG(Ser0UDCCR) + 0xffff,
145 .flags = IORESOURCE_MEM,
148 .start = IRQ_Ser0UDC,
150 .flags = IORESOURCE_IRQ,
154 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
156 static struct platform_device sa11x0udc_device = {
157 .name = "sa11x0-udc",
160 .dma_mask = &sa11x0udc_dma_mask,
161 .coherent_dma_mask = 0xffffffff,
163 .num_resources = ARRAY_SIZE(sa11x0udc_resources),
164 .resource = sa11x0udc_resources,
167 static struct resource sa11x0uart1_resources[] = {
169 .start = __PREG(Ser1UTCR0),
170 .end = __PREG(Ser1UTCR0) + 0xffff,
171 .flags = IORESOURCE_MEM,
174 .start = IRQ_Ser1UART,
176 .flags = IORESOURCE_IRQ,
180 static struct platform_device sa11x0uart1_device = {
181 .name = "sa11x0-uart",
183 .num_resources = ARRAY_SIZE(sa11x0uart1_resources),
184 .resource = sa11x0uart1_resources,
187 static struct resource sa11x0uart3_resources[] = {
189 .start = __PREG(Ser3UTCR0),
190 .end = __PREG(Ser3UTCR0) + 0xffff,
191 .flags = IORESOURCE_MEM,
194 .start = IRQ_Ser3UART,
196 .flags = IORESOURCE_IRQ,
200 static struct platform_device sa11x0uart3_device = {
201 .name = "sa11x0-uart",
203 .num_resources = ARRAY_SIZE(sa11x0uart3_resources),
204 .resource = sa11x0uart3_resources,
207 static struct resource sa11x0mcp_resources[] = {
209 .start = __PREG(Ser4MCCR0),
210 .end = __PREG(Ser4MCCR0) + 0xffff,
211 .flags = IORESOURCE_MEM,
214 .start = IRQ_Ser4MCP,
216 .flags = IORESOURCE_IRQ,
220 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
222 static struct platform_device sa11x0mcp_device = {
223 .name = "sa11x0-mcp",
226 .dma_mask = &sa11x0mcp_dma_mask,
227 .coherent_dma_mask = 0xffffffff,
229 .num_resources = ARRAY_SIZE(sa11x0mcp_resources),
230 .resource = sa11x0mcp_resources,
233 void sa11x0_register_mcp(struct mcp_plat_data *data)
235 sa11x0_register_device(&sa11x0mcp_device, data);
238 static struct resource sa11x0ssp_resources[] = {
242 .flags = IORESOURCE_MEM,
245 .start = IRQ_Ser4SSP,
247 .flags = IORESOURCE_IRQ,
251 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
253 static struct platform_device sa11x0ssp_device = {
254 .name = "sa11x0-ssp",
257 .dma_mask = &sa11x0ssp_dma_mask,
258 .coherent_dma_mask = 0xffffffff,
260 .num_resources = ARRAY_SIZE(sa11x0ssp_resources),
261 .resource = sa11x0ssp_resources,
264 static struct resource sa11x0fb_resources[] = {
268 .flags = IORESOURCE_MEM,
273 .flags = IORESOURCE_IRQ,
277 static struct platform_device sa11x0fb_device = {
281 .coherent_dma_mask = 0xffffffff,
283 .num_resources = ARRAY_SIZE(sa11x0fb_resources),
284 .resource = sa11x0fb_resources,
287 static struct platform_device sa11x0pcmcia_device = {
288 .name = "sa11x0-pcmcia",
292 static struct platform_device sa11x0mtd_device = {
293 .name = "sa1100-mtd",
297 void sa11x0_register_mtd(struct flash_platform_data *flash,
298 struct resource *res, int nr)
300 flash->name = "sa1100";
301 sa11x0mtd_device.resource = res;
302 sa11x0mtd_device.num_resources = nr;
303 sa11x0_register_device(&sa11x0mtd_device, flash);
306 static struct resource sa11x0ir_resources[] = {
308 .start = __PREG(Ser2UTCR0),
309 .end = __PREG(Ser2UTCR0) + 0x24 - 1,
310 .flags = IORESOURCE_MEM,
312 .start = __PREG(Ser2HSCR0),
313 .end = __PREG(Ser2HSCR0) + 0x1c - 1,
314 .flags = IORESOURCE_MEM,
316 .start = __PREG(Ser2HSCR2),
317 .end = __PREG(Ser2HSCR2) + 0x04 - 1,
318 .flags = IORESOURCE_MEM,
320 .start = IRQ_Ser2ICP,
322 .flags = IORESOURCE_IRQ,
326 static struct platform_device sa11x0ir_device = {
329 .num_resources = ARRAY_SIZE(sa11x0ir_resources),
330 .resource = sa11x0ir_resources,
333 void sa11x0_register_irda(struct irda_platform_data *irda)
335 sa11x0_register_device(&sa11x0ir_device, irda);
338 static struct platform_device sa11x0rtc_device = {
339 .name = "sa1100-rtc",
343 static struct platform_device *sa11x0_devices[] __initdata = {
348 &sa11x0pcmcia_device,
353 static int __init sa1100_init(void)
355 pm_power_off = sa1100_power_off;
356 return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
359 arch_initcall(sa1100_init);
361 void (*sa1100fb_backlight_power)(int on);
362 void (*sa1100fb_lcd_power)(int on);
364 EXPORT_SYMBOL(sa1100fb_backlight_power);
365 EXPORT_SYMBOL(sa1100fb_lcd_power);
369 * Common I/O mapping:
371 * Typically, static virtual address mappings are as follow:
373 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
374 * 0xf4000000-0xf4ffffff: SA-1111
375 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
376 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
377 * 0xffff0000-0xffff0fff: SA1100 exception vectors
378 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
380 * Below 0xe8000000 is reserved for vm allocation.
382 * The machine specific code must provide the extra mapping beside the
383 * default mapping provided here.
386 static struct map_desc standard_io_desc[] __initdata = {
388 .virtual = 0xf8000000,
389 .pfn = __phys_to_pfn(0x80000000),
390 .length = 0x00100000,
393 .virtual = 0xfa000000,
394 .pfn = __phys_to_pfn(0x90000000),
395 .length = 0x00100000,
398 .virtual = 0xfc000000,
399 .pfn = __phys_to_pfn(0xa0000000),
400 .length = 0x00100000,
403 .virtual = 0xfe000000,
404 .pfn = __phys_to_pfn(0xb0000000),
405 .length = 0x00200000,
410 void __init sa1100_map_io(void)
412 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
416 * Disable the memory bus request/grant signals on the SA1110 to
417 * ensure that we don't receive spurious memory requests. We set
418 * the MBGNT signal false to ensure the SA1111 doesn't own the
421 void __init sa1110_mb_disable(void)
425 local_irq_save(flags);
429 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
431 GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
433 local_irq_restore(flags);
437 * If the system is going to use the SA-1111 DMA engines, set up
438 * the memory bus request/grant pins.
440 void __devinit sa1110_mb_enable(void)
444 local_irq_save(flags);
448 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
450 GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
453 local_irq_restore(flags);