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/config.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
18 #include <linux/cpufreq.h>
19 #include <linux/ioport.h>
21 #include <asm/div64.h>
22 #include <asm/hardware.h>
23 #include <asm/system.h>
24 #include <asm/pgtable.h>
25 #include <asm/mach/map.h>
33 * This table is setup for a 3.6864MHz Crystal.
35 static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
54 #if defined(CONFIG_CPU_FREQ_SA1100) || defined(CONFIG_CPU_FREQ_SA1110)
56 unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
62 for (i = 0; i < NR_FREQS; i++)
63 if (cclk_frequency_100khz[i] >= khz)
69 unsigned int sa11x0_ppcr_to_freq(unsigned int idx)
71 unsigned int freq = 0;
73 freq = cclk_frequency_100khz[idx] * 100;
78 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
79 * this platform, anyway.
81 int sa11x0_verify_speed(struct cpufreq_policy *policy)
87 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
89 /* make sure that at least one frequency is within the policy */
90 tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;
91 if (tmp > policy->max)
94 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
99 unsigned int sa11x0_getspeed(unsigned int cpu)
103 return cclk_frequency_100khz[PPCR & 0xf] * 100;
108 * We still need to provide this so building without cpufreq works.
110 unsigned int cpufreq_get(unsigned int cpu)
112 return cclk_frequency_100khz[PPCR & 0xf] * 100;
114 EXPORT_SYMBOL(cpufreq_get);
118 * This is the SA11x0 sched_clock implementation. This has
119 * a resolution of 271ns, and a maximum value of 1165s.
120 * ( * 1E9 / 3686400 => * 78125 / 288)
122 unsigned long long sched_clock(void)
124 unsigned long long v;
126 v = (unsigned long long)OSCR * 78125;
133 * Default power-off for SA1100
135 static void sa1100_power_off(void)
139 /* disable internal oscillator, float CS lines */
140 PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
141 /* enable wake-up on GPIO0 (Assabet...) */
142 PWER = GFER = GRER = 1;
144 * set scratchpad to zero, just in case it is used as a
145 * restart address by the bootloader.
148 /* enter sleep mode */
152 static struct resource sa11x0udc_resources[] = {
156 .flags = IORESOURCE_MEM,
160 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
162 static struct platform_device sa11x0udc_device = {
163 .name = "sa11x0-udc",
166 .dma_mask = &sa11x0udc_dma_mask,
167 .coherent_dma_mask = 0xffffffff,
169 .num_resources = ARRAY_SIZE(sa11x0udc_resources),
170 .resource = sa11x0udc_resources,
173 static struct resource sa11x0uart1_resources[] = {
177 .flags = IORESOURCE_MEM,
181 static struct platform_device sa11x0uart1_device = {
182 .name = "sa11x0-uart",
184 .num_resources = ARRAY_SIZE(sa11x0uart1_resources),
185 .resource = sa11x0uart1_resources,
188 static struct resource sa11x0uart3_resources[] = {
192 .flags = IORESOURCE_MEM,
196 static struct platform_device sa11x0uart3_device = {
197 .name = "sa11x0-uart",
199 .num_resources = ARRAY_SIZE(sa11x0uart3_resources),
200 .resource = sa11x0uart3_resources,
203 static struct resource sa11x0mcp_resources[] = {
207 .flags = IORESOURCE_MEM,
211 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
213 static struct platform_device sa11x0mcp_device = {
214 .name = "sa11x0-mcp",
217 .dma_mask = &sa11x0mcp_dma_mask,
218 .coherent_dma_mask = 0xffffffff,
220 .num_resources = ARRAY_SIZE(sa11x0mcp_resources),
221 .resource = sa11x0mcp_resources,
224 static struct resource sa11x0ssp_resources[] = {
228 .flags = IORESOURCE_MEM,
232 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
234 static struct platform_device sa11x0ssp_device = {
235 .name = "sa11x0-ssp",
238 .dma_mask = &sa11x0ssp_dma_mask,
239 .coherent_dma_mask = 0xffffffff,
241 .num_resources = ARRAY_SIZE(sa11x0ssp_resources),
242 .resource = sa11x0ssp_resources,
245 static struct resource sa11x0fb_resources[] = {
249 .flags = IORESOURCE_MEM,
254 .flags = IORESOURCE_IRQ,
258 static struct platform_device sa11x0fb_device = {
262 .coherent_dma_mask = 0xffffffff,
264 .num_resources = ARRAY_SIZE(sa11x0fb_resources),
265 .resource = sa11x0fb_resources,
268 static struct platform_device sa11x0pcmcia_device = {
269 .name = "sa11x0-pcmcia",
273 static struct platform_device sa11x0mtd_device = {
278 void sa11x0_set_flash_data(struct flash_platform_data *flash,
279 struct resource *res, int nr)
281 sa11x0mtd_device.dev.platform_data = flash;
282 sa11x0mtd_device.resource = res;
283 sa11x0mtd_device.num_resources = nr;
286 static struct resource sa11x0ir_resources[] = {
288 .start = __PREG(Ser2UTCR0),
289 .end = __PREG(Ser2UTCR0) + 0x24 - 1,
290 .flags = IORESOURCE_MEM,
292 .start = __PREG(Ser2HSCR0),
293 .end = __PREG(Ser2HSCR0) + 0x1c - 1,
294 .flags = IORESOURCE_MEM,
296 .start = __PREG(Ser2HSCR2),
297 .end = __PREG(Ser2HSCR2) + 0x04 - 1,
298 .flags = IORESOURCE_MEM,
300 .start = IRQ_Ser2ICP,
302 .flags = IORESOURCE_IRQ,
306 static struct platform_device sa11x0ir_device = {
309 .num_resources = ARRAY_SIZE(sa11x0ir_resources),
310 .resource = sa11x0ir_resources,
313 void sa11x0_set_irda_data(struct irda_platform_data *irda)
315 sa11x0ir_device.dev.platform_data = irda;
318 static struct platform_device *sa11x0_devices[] __initdata = {
324 &sa11x0pcmcia_device,
329 static int __init sa1100_init(void)
331 pm_power_off = sa1100_power_off;
333 if (sa11x0ir_device.dev.platform_data)
334 platform_device_register(&sa11x0ir_device);
336 return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
339 arch_initcall(sa1100_init);
341 void (*sa1100fb_backlight_power)(int on);
342 void (*sa1100fb_lcd_power)(int on);
344 EXPORT_SYMBOL(sa1100fb_backlight_power);
345 EXPORT_SYMBOL(sa1100fb_lcd_power);
349 * Common I/O mapping:
351 * Typically, static virtual address mappings are as follow:
353 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
354 * 0xf4000000-0xf4ffffff: SA-1111
355 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
356 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
357 * 0xffff0000-0xffff0fff: SA1100 exception vectors
358 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
360 * Below 0xe8000000 is reserved for vm allocation.
362 * The machine specific code must provide the extra mapping beside the
363 * default mapping provided here.
366 static struct map_desc standard_io_desc[] __initdata = {
367 /* virtual physical length type */
368 { 0xf8000000, 0x80000000, 0x00100000, MT_DEVICE }, /* PCM */
369 { 0xfa000000, 0x90000000, 0x00100000, MT_DEVICE }, /* SCM */
370 { 0xfc000000, 0xa0000000, 0x00100000, MT_DEVICE }, /* MER */
371 { 0xfe000000, 0xb0000000, 0x00200000, MT_DEVICE } /* LCD + DMA */
374 void __init sa1100_map_io(void)
376 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
380 * Disable the memory bus request/grant signals on the SA1110 to
381 * ensure that we don't receive spurious memory requests. We set
382 * the MBGNT signal false to ensure the SA1111 doesn't own the
385 void __init sa1110_mb_disable(void)
389 local_irq_save(flags);
393 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
395 GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
397 local_irq_restore(flags);
401 * If the system is going to use the SA-1111 DMA engines, set up
402 * the memory bus request/grant pins.
404 void __init sa1110_mb_enable(void)
408 local_irq_save(flags);
412 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
414 GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
417 local_irq_restore(flags);