3 * arch/arm/mach-u300/core.c
6 * Copyright (C) 2007-2009 ST-Ericsson AB
7 * License terms: GNU General Public License (GPL) version 2
8 * Core platform support, IRQ handling and device definitions.
9 * Author: Linus Walleij <linus.walleij@stericsson.com>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/spinlock.h>
14 #include <linux/interrupt.h>
15 #include <linux/bitops.h>
16 #include <linux/device.h>
18 #include <linux/termios.h>
19 #include <linux/amba/bus.h>
20 #include <linux/platform_device.h>
21 #include <linux/gpio.h>
23 #include <asm/types.h>
24 #include <asm/setup.h>
25 #include <asm/memory.h>
26 #include <asm/hardware/vic.h>
27 #include <asm/mach/map.h>
28 #include <asm/mach/irq.h>
30 #include <mach/hardware.h>
31 #include <mach/syscon.h>
37 * Static I/O mappings that are needed for booting the U300 platforms. The
38 * only things we need are the areas where we find the timer, syscon and
39 * intcon, since the remaining device drivers will map their own memory
40 * physical to virtual as the need arise.
42 static struct map_desc u300_io_desc[] __initdata = {
44 .virtual = U300_SLOW_PER_VIRT_BASE,
45 .pfn = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE),
50 .virtual = U300_AHB_PER_VIRT_BASE,
51 .pfn = __phys_to_pfn(U300_AHB_PER_PHYS_BASE),
56 .virtual = U300_FAST_PER_VIRT_BASE,
57 .pfn = __phys_to_pfn(U300_FAST_PER_PHYS_BASE),
62 .virtual = 0xffff2000, /* TCM memory */
63 .pfn = __phys_to_pfn(0xffff2000),
69 * This overlaps with the IRQ vectors etc at 0xffff0000, so these
70 * may have to be moved to 0x00000000 in order to use the ROM.
74 .virtual = U300_BOOTROM_VIRT_BASE,
75 .pfn = __phys_to_pfn(U300_BOOTROM_PHYS_BASE),
82 void __init u300_map_io(void)
84 iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
88 * Declaration of devices found on the U300 board and
89 * their respective memory locations.
91 static struct amba_device uart0_device = {
93 .init_name = "uart0", /* Slow device at 0x3000 offset */
94 .platform_data = NULL,
97 .start = U300_UART0_BASE,
98 .end = U300_UART0_BASE + SZ_4K - 1,
99 .flags = IORESOURCE_MEM,
101 .irq = { IRQ_U300_UART0, NO_IRQ },
104 /* The U335 have an additional UART1 on the APP CPU */
105 #ifdef CONFIG_MACH_U300_BS335
106 static struct amba_device uart1_device = {
108 .init_name = "uart1", /* Fast device at 0x7000 offset */
109 .platform_data = NULL,
112 .start = U300_UART1_BASE,
113 .end = U300_UART1_BASE + SZ_4K - 1,
114 .flags = IORESOURCE_MEM,
116 .irq = { IRQ_U300_UART1, NO_IRQ },
120 static struct amba_device pl172_device = {
122 .init_name = "pl172", /* AHB device at 0x4000 offset */
123 .platform_data = NULL,
126 .start = U300_EMIF_CFG_BASE,
127 .end = U300_EMIF_CFG_BASE + SZ_4K - 1,
128 .flags = IORESOURCE_MEM,
134 * Everything within this next ifdef deals with external devices connected to
137 static struct amba_device pl022_device = {
139 .coherent_dma_mask = ~0,
140 .init_name = "pl022", /* Fast device at 0x6000 offset */
143 .start = U300_SPI_BASE,
144 .end = U300_SPI_BASE + SZ_4K - 1,
145 .flags = IORESOURCE_MEM,
147 .irq = {IRQ_U300_SPI, NO_IRQ },
149 * This device has a DMA channel but the Linux driver does not use
154 static struct amba_device mmcsd_device = {
156 .init_name = "mmci", /* Fast device at 0x1000 offset */
157 .platform_data = NULL, /* Added later */
160 .start = U300_MMCSD_BASE,
161 .end = U300_MMCSD_BASE + SZ_4K - 1,
162 .flags = IORESOURCE_MEM,
164 .irq = {IRQ_U300_MMCSD_MCIINTR0, IRQ_U300_MMCSD_MCIINTR1 },
166 * This device has a DMA channel but the Linux driver does not use
172 * The order of device declaration may be important, since some devices
173 * have dependencies on other devices being initialized first.
175 static struct amba_device *amba_devs[] __initdata = {
177 #ifdef CONFIG_MACH_U300_BS335
185 /* Here follows a list of all hw resources that the platform devices
186 * allocate. Note, clock dependencies are not included
189 static struct resource gpio_resources[] = {
191 .start = U300_GPIO_BASE,
192 .end = (U300_GPIO_BASE + SZ_4K - 1),
193 .flags = IORESOURCE_MEM,
197 .start = IRQ_U300_GPIO_PORT0,
198 .end = IRQ_U300_GPIO_PORT0,
199 .flags = IORESOURCE_IRQ,
203 .start = IRQ_U300_GPIO_PORT1,
204 .end = IRQ_U300_GPIO_PORT1,
205 .flags = IORESOURCE_IRQ,
209 .start = IRQ_U300_GPIO_PORT2,
210 .end = IRQ_U300_GPIO_PORT2,
211 .flags = IORESOURCE_IRQ,
213 #ifdef U300_COH901571_3
216 .start = IRQ_U300_GPIO_PORT3,
217 .end = IRQ_U300_GPIO_PORT3,
218 .flags = IORESOURCE_IRQ,
222 .start = IRQ_U300_GPIO_PORT4,
223 .end = IRQ_U300_GPIO_PORT4,
224 .flags = IORESOURCE_IRQ,
226 #ifdef CONFIG_MACH_U300_BS335
229 .start = IRQ_U300_GPIO_PORT5,
230 .end = IRQ_U300_GPIO_PORT5,
231 .flags = IORESOURCE_IRQ,
235 .start = IRQ_U300_GPIO_PORT6,
236 .end = IRQ_U300_GPIO_PORT6,
237 .flags = IORESOURCE_IRQ,
239 #endif /* CONFIG_MACH_U300_BS335 */
240 #endif /* U300_COH901571_3 */
243 static struct resource keypad_resources[] = {
245 .start = U300_KEYPAD_BASE,
246 .end = U300_KEYPAD_BASE + SZ_4K - 1,
247 .flags = IORESOURCE_MEM,
250 .name = "coh901461-press",
251 .start = IRQ_U300_KEYPAD_KEYBF,
252 .end = IRQ_U300_KEYPAD_KEYBF,
253 .flags = IORESOURCE_IRQ,
256 .name = "coh901461-release",
257 .start = IRQ_U300_KEYPAD_KEYBR,
258 .end = IRQ_U300_KEYPAD_KEYBR,
259 .flags = IORESOURCE_IRQ,
263 static struct resource rtc_resources[] = {
265 .start = U300_RTC_BASE,
266 .end = U300_RTC_BASE + SZ_4K - 1,
267 .flags = IORESOURCE_MEM,
270 .start = IRQ_U300_RTC,
272 .flags = IORESOURCE_IRQ,
277 * Fsmc does have IRQs: #43 and #44 (NFIF and NFIF2)
278 * but these are not yet used by the driver.
280 static struct resource fsmc_resources[] = {
282 .start = U300_NAND_IF_PHYS_BASE,
283 .end = U300_NAND_IF_PHYS_BASE + SZ_4K - 1,
284 .flags = IORESOURCE_MEM,
288 static struct resource i2c0_resources[] = {
290 .start = U300_I2C0_BASE,
291 .end = U300_I2C0_BASE + SZ_4K - 1,
292 .flags = IORESOURCE_MEM,
295 .start = IRQ_U300_I2C0,
296 .end = IRQ_U300_I2C0,
297 .flags = IORESOURCE_IRQ,
301 static struct resource i2c1_resources[] = {
303 .start = U300_I2C1_BASE,
304 .end = U300_I2C1_BASE + SZ_4K - 1,
305 .flags = IORESOURCE_MEM,
308 .start = IRQ_U300_I2C1,
309 .end = IRQ_U300_I2C1,
310 .flags = IORESOURCE_IRQ,
315 static struct resource wdog_resources[] = {
317 .start = U300_WDOG_BASE,
318 .end = U300_WDOG_BASE + SZ_4K - 1,
319 .flags = IORESOURCE_MEM,
322 .start = IRQ_U300_WDOG,
323 .end = IRQ_U300_WDOG,
324 .flags = IORESOURCE_IRQ,
328 /* TODO: These should be protected by suitable #ifdef's */
329 static struct resource ave_resources[] = {
331 .name = "AVE3e I/O Area",
332 .start = U300_VIDEOENC_BASE,
333 .end = U300_VIDEOENC_BASE + SZ_512K - 1,
334 .flags = IORESOURCE_MEM,
337 .name = "AVE3e IRQ0",
338 .start = IRQ_U300_VIDEO_ENC_0,
339 .end = IRQ_U300_VIDEO_ENC_0,
340 .flags = IORESOURCE_IRQ,
343 .name = "AVE3e IRQ1",
344 .start = IRQ_U300_VIDEO_ENC_1,
345 .end = IRQ_U300_VIDEO_ENC_1,
346 .flags = IORESOURCE_IRQ,
349 .name = "AVE3e Physmem Area",
350 .start = 0, /* 0 will be remapped to reserved memory */
352 .flags = IORESOURCE_MEM,
355 * The AVE3e requires two regions of 256MB that it considers
356 * "invisible". The hardware will not be able to access these
357 * adresses, so they should never point to system RAM.
360 .name = "AVE3e Reserved 0",
362 .end = 0xd0000000 + SZ_256M - 1,
363 .flags = IORESOURCE_MEM,
366 .name = "AVE3e Reserved 1",
368 .end = 0xe0000000 + SZ_256M - 1,
369 .flags = IORESOURCE_MEM,
373 static struct platform_device wdog_device = {
376 .num_resources = ARRAY_SIZE(wdog_resources),
377 .resource = wdog_resources,
380 static struct platform_device i2c0_device = {
383 .num_resources = ARRAY_SIZE(i2c0_resources),
384 .resource = i2c0_resources,
387 static struct platform_device i2c1_device = {
390 .num_resources = ARRAY_SIZE(i2c1_resources),
391 .resource = i2c1_resources,
394 static struct platform_device gpio_device = {
397 .num_resources = ARRAY_SIZE(gpio_resources),
398 .resource = gpio_resources,
401 static struct platform_device keypad_device = {
404 .num_resources = ARRAY_SIZE(keypad_resources),
405 .resource = keypad_resources,
408 static struct platform_device rtc_device = {
411 .num_resources = ARRAY_SIZE(rtc_resources),
412 .resource = rtc_resources,
415 static struct platform_device fsmc_device = {
418 .num_resources = ARRAY_SIZE(fsmc_resources),
419 .resource = fsmc_resources,
422 static struct platform_device ave_device = {
425 .num_resources = ARRAY_SIZE(ave_resources),
426 .resource = ave_resources,
430 * Notice that AMBA devices are initialized before platform devices.
433 static struct platform_device *platform_devs[] __initdata = {
446 * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected
447 * together so some interrupts are connected to the first one and some
450 void __init u300_init_irq(void)
452 u32 mask[2] = {0, 0};
455 for (i = 0; i < NR_IRQS; i++)
456 set_bit(i, (unsigned long *) &mask[0]);
457 u300_enable_intcon_clock();
458 vic_init((void __iomem *) U300_INTCON0_VBASE, 0, mask[0], 0);
459 vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1], 0);
464 * U300 platforms peripheral handling
472 * This is a list of the Digital Baseband chips used in the U300 platform.
474 static struct db_chip db_chips[] __initdata = {
501 .name = "DB3350 P1x",
505 .name = "DB3350 P2x",
508 .chipid = 0x0000, /* List terminator */
513 static void u300_init_check_chip(void)
517 struct db_chip *chip;
518 const char *chipname;
519 const char unknown[] = "UNKNOWN";
521 /* Read out and print chip ID */
522 val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR);
523 /* This is in funky bigendian order... */
524 val = (val & 0xFFU) << 8 | (val >> 8);
528 for ( ; chip->chipid; chip++) {
529 if (chip->chipid == (val & 0xFF00U)) {
530 chipname = chip->name;
534 printk(KERN_INFO "Initializing U300 system on %s baseband chip " \
535 "(chip ID 0x%04x)\n", chipname, val);
537 #ifdef CONFIG_MACH_U300_BS26
538 if ((val & 0xFF00U) != 0xc800) {
539 printk(KERN_ERR "Platform configured for BS25/BS26 " \
540 "with DB3150 but %s detected, expect problems!",
544 #ifdef CONFIG_MACH_U300_BS330
545 if ((val & 0xFF00U) != 0xd800) {
546 printk(KERN_ERR "Platform configured for BS330 " \
547 "with DB3200 but %s detected, expect problems!",
551 #ifdef CONFIG_MACH_U300_BS335
552 if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
553 printk(KERN_ERR "Platform configured for BS365 " \
554 " with DB3350 but %s detected, expect problems!",
558 #ifdef CONFIG_MACH_U300_BS365
559 if ((val & 0xFF00U) != 0xe800) {
560 printk(KERN_ERR "Platform configured for BS365 " \
561 "with DB3210 but %s detected, expect problems!",
570 * Some devices and their resources require reserved physical memory from
571 * the end of the available RAM. This function traverses the list of devices
572 * and assigns actual adresses to these.
574 static void __init u300_assign_physmem(void)
576 unsigned long curr_start = __pa(high_memory);
579 for (i = 0; i < ARRAY_SIZE(platform_devs); i++) {
580 for (j = 0; j < platform_devs[i]->num_resources; j++) {
581 struct resource *const res =
582 &platform_devs[i]->resource[j];
584 if (IORESOURCE_MEM == res->flags &&
586 res->start = curr_start;
587 res->end += curr_start;
588 curr_start += (res->end - res->start + 1);
590 printk(KERN_INFO "core.c: Mapping RAM " \
591 "%#x-%#x to device %s:%s\n",
592 res->start, res->end,
593 platform_devs[i]->name, res->name);
599 void __init u300_init_devices(void)
604 /* Check what platform we run and print some status information */
605 u300_init_check_chip();
607 /* Set system to run at PLL208, max performance, a known state. */
608 val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
609 val &= ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
610 writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
611 /* Wait for the PLL208 to lock if not locked in yet */
612 while (!(readw(U300_SYSCON_VBASE + U300_SYSCON_CSR) &
613 U300_SYSCON_CSR_PLL208_LOCK_IND));
615 /* Register the AMBA devices in the AMBA bus abstraction layer */
616 u300_clock_primecells();
617 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
618 struct amba_device *d = amba_devs[i];
619 amba_device_register(d, &iomem_resource);
621 u300_unclock_primecells();
623 u300_assign_physmem();
625 /* Register the platform devices */
626 platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
628 #ifndef CONFIG_MACH_U300_SEMI_IS_SHARED
630 * Enable SEMI self refresh. Self-refresh of the SDRAM is entered when
631 * both subsystems are requesting this mode.
632 * If we not share the Acc SDRAM, this is never the case. Therefore
633 * enable it here from the App side.
635 val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) |
636 U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
637 writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR);
638 #endif /* CONFIG_MACH_U300_SEMI_IS_SHARED */
641 static int core_module_init(void)
644 * This needs to be initialized later: it needs the input framework
645 * to be initialized first.
647 return mmc_init(&mmcsd_device);
649 module_init(core_module_init);