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/gpio.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>
20 #include <linux/platform_device.h>
22 #include <asm/div64.h>
23 #include <mach/hardware.h>
24 #include <asm/system.h>
25 #include <asm/mach/map.h>
26 #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 void sa11x0_restart(char mode, const char *cmd)
132 /* Jump into ROM at address 0 */
135 /* Use on-chip reset capability */
140 static void sa11x0_register_device(struct platform_device *dev, void *data)
143 dev->dev.platform_data = data;
144 err = platform_device_register(dev);
146 printk(KERN_ERR "Unable to register device %s: %d\n",
151 static struct resource sa11x0udc_resources[] = {
153 .start = __PREG(Ser0UDCCR),
154 .end = __PREG(Ser0UDCCR) + 0xffff,
155 .flags = IORESOURCE_MEM,
158 .start = IRQ_Ser0UDC,
160 .flags = IORESOURCE_IRQ,
164 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
166 static struct platform_device sa11x0udc_device = {
167 .name = "sa11x0-udc",
170 .dma_mask = &sa11x0udc_dma_mask,
171 .coherent_dma_mask = 0xffffffff,
173 .num_resources = ARRAY_SIZE(sa11x0udc_resources),
174 .resource = sa11x0udc_resources,
177 static struct resource sa11x0uart1_resources[] = {
179 .start = __PREG(Ser1UTCR0),
180 .end = __PREG(Ser1UTCR0) + 0xffff,
181 .flags = IORESOURCE_MEM,
184 .start = IRQ_Ser1UART,
186 .flags = IORESOURCE_IRQ,
190 static struct platform_device sa11x0uart1_device = {
191 .name = "sa11x0-uart",
193 .num_resources = ARRAY_SIZE(sa11x0uart1_resources),
194 .resource = sa11x0uart1_resources,
197 static struct resource sa11x0uart3_resources[] = {
199 .start = __PREG(Ser3UTCR0),
200 .end = __PREG(Ser3UTCR0) + 0xffff,
201 .flags = IORESOURCE_MEM,
204 .start = IRQ_Ser3UART,
206 .flags = IORESOURCE_IRQ,
210 static struct platform_device sa11x0uart3_device = {
211 .name = "sa11x0-uart",
213 .num_resources = ARRAY_SIZE(sa11x0uart3_resources),
214 .resource = sa11x0uart3_resources,
217 static struct resource sa11x0mcp_resources[] = {
219 .start = __PREG(Ser4MCCR0),
220 .end = __PREG(Ser4MCCR0) + 0xffff,
221 .flags = IORESOURCE_MEM,
224 .start = __PREG(Ser4MCCR1),
225 .end = __PREG(Ser4MCCR1) + 4 - 1,
226 .flags = IORESOURCE_MEM,
229 .start = IRQ_Ser4MCP,
231 .flags = IORESOURCE_IRQ,
235 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
237 static struct platform_device sa11x0mcp_device = {
238 .name = "sa11x0-mcp",
241 .dma_mask = &sa11x0mcp_dma_mask,
242 .coherent_dma_mask = 0xffffffff,
244 .num_resources = ARRAY_SIZE(sa11x0mcp_resources),
245 .resource = sa11x0mcp_resources,
248 void __init sa11x0_ppc_configure_mcp(void)
250 /* Setup the PPC unit for the MCP */
252 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
254 PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
255 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
258 void sa11x0_register_mcp(struct mcp_plat_data *data)
260 sa11x0_register_device(&sa11x0mcp_device, data);
263 static struct resource sa11x0ssp_resources[] = {
267 .flags = IORESOURCE_MEM,
270 .start = IRQ_Ser4SSP,
272 .flags = IORESOURCE_IRQ,
276 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
278 static struct platform_device sa11x0ssp_device = {
279 .name = "sa11x0-ssp",
282 .dma_mask = &sa11x0ssp_dma_mask,
283 .coherent_dma_mask = 0xffffffff,
285 .num_resources = ARRAY_SIZE(sa11x0ssp_resources),
286 .resource = sa11x0ssp_resources,
289 static struct resource sa11x0fb_resources[] = {
293 .flags = IORESOURCE_MEM,
298 .flags = IORESOURCE_IRQ,
302 static struct platform_device sa11x0fb_device = {
306 .coherent_dma_mask = 0xffffffff,
308 .num_resources = ARRAY_SIZE(sa11x0fb_resources),
309 .resource = sa11x0fb_resources,
312 static struct platform_device sa11x0pcmcia_device = {
313 .name = "sa11x0-pcmcia",
317 static struct platform_device sa11x0mtd_device = {
318 .name = "sa1100-mtd",
322 void sa11x0_register_mtd(struct flash_platform_data *flash,
323 struct resource *res, int nr)
325 flash->name = "sa1100";
326 sa11x0mtd_device.resource = res;
327 sa11x0mtd_device.num_resources = nr;
328 sa11x0_register_device(&sa11x0mtd_device, flash);
331 static struct resource sa11x0ir_resources[] = {
333 .start = __PREG(Ser2UTCR0),
334 .end = __PREG(Ser2UTCR0) + 0x24 - 1,
335 .flags = IORESOURCE_MEM,
337 .start = __PREG(Ser2HSCR0),
338 .end = __PREG(Ser2HSCR0) + 0x1c - 1,
339 .flags = IORESOURCE_MEM,
341 .start = __PREG(Ser2HSCR2),
342 .end = __PREG(Ser2HSCR2) + 0x04 - 1,
343 .flags = IORESOURCE_MEM,
345 .start = IRQ_Ser2ICP,
347 .flags = IORESOURCE_IRQ,
351 static struct platform_device sa11x0ir_device = {
354 .num_resources = ARRAY_SIZE(sa11x0ir_resources),
355 .resource = sa11x0ir_resources,
358 void sa11x0_register_irda(struct irda_platform_data *irda)
360 sa11x0_register_device(&sa11x0ir_device, irda);
363 static struct resource sa11x0rtc_resources[] = {
367 .flags = IORESOURCE_MEM,
372 .flags = IORESOURCE_IRQ,
375 .start = IRQ_RTCAlrm,
377 .flags = IORESOURCE_IRQ,
381 static struct platform_device sa11x0rtc_device = {
382 .name = "sa1100-rtc",
384 .resource = sa11x0rtc_resources,
385 .num_resources = ARRAY_SIZE(sa11x0rtc_resources),
388 static struct platform_device *sa11x0_devices[] __initdata = {
393 &sa11x0pcmcia_device,
398 static int __init sa1100_init(void)
400 pm_power_off = sa1100_power_off;
401 return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
404 arch_initcall(sa1100_init);
406 void (*sa1100fb_backlight_power)(int on);
407 void (*sa1100fb_lcd_power)(int on);
409 EXPORT_SYMBOL(sa1100fb_backlight_power);
410 EXPORT_SYMBOL(sa1100fb_lcd_power);
414 * Common I/O mapping:
416 * Typically, static virtual address mappings are as follow:
418 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
419 * 0xf4000000-0xf4ffffff: SA-1111
420 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
421 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
422 * 0xffff0000-0xffff0fff: SA1100 exception vectors
423 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
425 * Below 0xe8000000 is reserved for vm allocation.
427 * The machine specific code must provide the extra mapping beside the
428 * default mapping provided here.
431 static struct map_desc standard_io_desc[] __initdata = {
433 .virtual = 0xf8000000,
434 .pfn = __phys_to_pfn(0x80000000),
435 .length = 0x00100000,
438 .virtual = 0xfa000000,
439 .pfn = __phys_to_pfn(0x90000000),
440 .length = 0x00100000,
443 .virtual = 0xfc000000,
444 .pfn = __phys_to_pfn(0xa0000000),
445 .length = 0x00100000,
448 .virtual = 0xfe000000,
449 .pfn = __phys_to_pfn(0xb0000000),
450 .length = 0x00200000,
455 void __init sa1100_map_io(void)
457 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
461 * Disable the memory bus request/grant signals on the SA1110 to
462 * ensure that we don't receive spurious memory requests. We set
463 * the MBGNT signal false to ensure the SA1111 doesn't own the
466 void __init sa1110_mb_disable(void)
470 local_irq_save(flags);
474 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
476 GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
478 local_irq_restore(flags);
482 * If the system is going to use the SA-1111 DMA engines, set up
483 * the memory bus request/grant pins.
485 void __devinit sa1110_mb_enable(void)
489 local_irq_save(flags);
493 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
495 GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
498 local_irq_restore(flags);