2 * linux/arch/arm/mach-sa1100/assabet.c
4 * Author: Nicolas Pitre
6 * This file contains all Assabet-specific tweaks.
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/init.h>
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/errno.h>
16 #include <linux/ioport.h>
17 #include <linux/platform_data/sa11x0-serial.h>
18 #include <linux/serial_core.h>
19 #include <linux/platform_device.h>
20 #include <linux/mfd/ucb1x00.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/partitions.h>
23 #include <linux/delay.h>
25 #include <linux/leds.h>
26 #include <linux/slab.h>
28 #include <video/sa1100fb.h>
30 #include <mach/hardware.h>
31 #include <asm/mach-types.h>
32 #include <asm/setup.h>
34 #include <asm/pgtable-hwdef.h>
35 #include <asm/pgtable.h>
36 #include <asm/tlbflush.h>
38 #include <asm/mach/arch.h>
39 #include <asm/mach/flash.h>
40 #include <asm/mach/irda.h>
41 #include <asm/mach/map.h>
42 #include <mach/assabet.h>
43 #include <linux/platform_data/mfd-mcp-sa11x0.h>
44 #include <mach/irqs.h>
48 #define ASSABET_BCR_DB1110 \
49 (ASSABET_BCR_SPK_OFF | \
50 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
51 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
54 #define ASSABET_BCR_DB1111 \
55 (ASSABET_BCR_SPK_OFF | \
56 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
57 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
58 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
59 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
61 unsigned long SCR_value = ASSABET_SCR_INIT;
62 EXPORT_SYMBOL(SCR_value);
64 static unsigned long BCR_value = ASSABET_BCR_DB1110;
66 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
70 local_irq_save(flags);
71 BCR_value = (BCR_value & ~mask) | val;
72 ASSABET_BCR = BCR_value;
73 local_irq_restore(flags);
76 EXPORT_SYMBOL(ASSABET_BCR_frob);
79 * The codec reset goes to three devices, so we need to release
80 * the rest when any one of these requests it. However, that
81 * causes the ADV7171 to consume around 100mA - more than half
82 * the LCD-blanked power.
84 * With the ADV7171, LCD and backlight enabled, we go over
85 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
86 * is connected, the Assabet crashes.
88 #define RST_UCB1X00 (1 << 0)
89 #define RST_UDA1341 (1 << 1)
90 #define RST_ADV7171 (1 << 2)
92 #define SDA GPIO_GPIO(15)
93 #define SCK GPIO_GPIO(18)
94 #define MOD GPIO_GPIO(17)
96 static void adv7171_start(void)
105 static void adv7171_stop(void)
113 static void adv7171_send(unsigned byte)
117 for (i = 0; i < 8; i++, byte <<= 1) {
136 printk(KERN_WARNING "No ACK from ADV7171\n");
144 static void adv7171_write(unsigned reg, unsigned val)
146 unsigned gpdr = GPDR;
147 unsigned gplr = GPLR;
149 ASSABET_BCR = BCR_value | ASSABET_BCR_AUDIO_ON;
152 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
153 GPDR = (GPDR | SCK | MOD) & ~SDA;
156 printk(KERN_WARNING "Something dragging SDA down?\n");
165 /* Restore GPIO state for L3 bus */
166 GPSR = gplr & (SDA | SCK | MOD);
167 GPCR = (~gplr) & (SDA | SCK | MOD);
171 static void adv7171_sleep(void)
173 /* Put the ADV7171 into sleep mode */
174 adv7171_write(0x04, 0x40);
177 static unsigned codec_nreset;
179 static void assabet_codec_reset(unsigned mask, int set)
184 local_irq_save(flags);
187 codec_nreset &= ~mask;
189 codec_nreset |= mask;
191 if (old != !codec_nreset) {
193 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
196 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
199 local_irq_restore(flags);
202 static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
204 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
205 state == UCB_RST_PROBE_FAIL;
206 assabet_codec_reset(RST_UCB1X00, set);
209 void assabet_uda1341_reset(int set)
211 assabet_codec_reset(RST_UDA1341, set);
213 EXPORT_SYMBOL(assabet_uda1341_reset);
217 * Assabet flash support code.
222 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
224 static struct mtd_partition assabet_partitions[] = {
226 .name = "bootloader",
229 .mask_flags = MTD_WRITEABLE,
231 .name = "bootloader params",
233 .offset = MTDPART_OFS_APPEND,
234 .mask_flags = MTD_WRITEABLE,
237 .size = MTDPART_SIZ_FULL,
238 .offset = MTDPART_OFS_APPEND,
243 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
245 static struct mtd_partition assabet_partitions[] = {
247 .name = "bootloader",
250 .mask_flags = MTD_WRITEABLE,
252 .name = "bootloader params",
254 .offset = MTDPART_OFS_APPEND,
255 .mask_flags = MTD_WRITEABLE,
258 .size = MTDPART_SIZ_FULL,
259 .offset = MTDPART_OFS_APPEND,
264 static struct flash_platform_data assabet_flash_data = {
265 .map_name = "cfi_probe",
266 .parts = assabet_partitions,
267 .nr_parts = ARRAY_SIZE(assabet_partitions),
270 static struct resource assabet_flash_resources[] = {
271 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
272 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
277 * Assabet IrDA support code.
280 static int assabet_irda_set_power(struct device *dev, unsigned int state)
282 static unsigned int bcr_state[4] = {
283 ASSABET_BCR_IRDA_MD0,
284 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
285 ASSABET_BCR_IRDA_MD1,
290 state = bcr_state[state];
291 ASSABET_BCR_clear(state ^ (ASSABET_BCR_IRDA_MD1|
292 ASSABET_BCR_IRDA_MD0));
293 ASSABET_BCR_set(state);
298 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
301 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
303 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
306 static struct irda_platform_data assabet_irda_data = {
307 .set_power = assabet_irda_set_power,
308 .set_speed = assabet_irda_set_speed,
311 static struct ucb1x00_plat_data assabet_ucb1x00_data = {
312 .reset = assabet_ucb1x00_reset,
317 static struct mcp_plat_data assabet_mcp_data = {
319 .sclk_rate = 11981000,
320 .codec_pdata = &assabet_ucb1x00_data,
323 static void assabet_lcd_set_visual(u32 visual)
325 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
327 if (machine_is_assabet()) {
328 #if 1 // phase 4 or newer Assabet's
330 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
332 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
336 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
338 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
343 #ifndef ASSABET_PAL_VIDEO
344 static void assabet_lcd_backlight_power(int on)
347 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
349 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
353 * Turn on/off the backlight. When turning the backlight on, we wait
354 * 500us after turning it on so we don't cause the supplies to droop
355 * when we enable the LCD controller (and cause a hard reset.)
357 static void assabet_lcd_power(int on)
360 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
363 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
367 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
368 * takes an RGB666 signal, but we provide it with an RGB565 signal
369 * instead (def_rgb_16).
371 static struct sa1100fb_mach_info lq039q2ds54_info = {
372 .pixclock = 171521, .bpp = 16,
373 .xres = 320, .yres = 240,
375 .hsync_len = 5, .vsync_len = 1,
376 .left_margin = 61, .upper_margin = 3,
377 .right_margin = 9, .lower_margin = 0,
379 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
381 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
382 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
384 .backlight_power = assabet_lcd_backlight_power,
385 .lcd_power = assabet_lcd_power,
386 .set_visual = assabet_lcd_set_visual,
389 static void assabet_pal_backlight_power(int on)
391 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
394 static void assabet_pal_power(int on)
396 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
399 static struct sa1100fb_mach_info pal_info = {
400 .pixclock = 67797, .bpp = 16,
401 .xres = 640, .yres = 512,
403 .hsync_len = 64, .vsync_len = 6,
404 .left_margin = 125, .upper_margin = 70,
405 .right_margin = 115, .lower_margin = 36,
407 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
408 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
410 .backlight_power = assabet_pal_backlight_power,
411 .lcd_power = assabet_pal_power,
412 .set_visual = assabet_lcd_set_visual,
416 #ifdef CONFIG_ASSABET_NEPONSET
417 static struct resource neponset_resources[] = {
418 DEFINE_RES_MEM(0x10000000, 0x08000000),
419 DEFINE_RES_MEM(0x18000000, 0x04000000),
420 DEFINE_RES_MEM(0x40000000, SZ_8K),
421 DEFINE_RES_IRQ(IRQ_GPIO25),
425 static void __init assabet_init(void)
428 * Ensure that the power supply is in "high power" mode.
434 * Ensure that these pins are set as outputs and are driving
435 * logic 0. This ensures that we won't inadvertently toggle
436 * the WS latch in the CPLD, and we don't float causing
437 * excessive power drain. --rmk
439 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
440 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
443 * Also set GPIO27 as an output; this is used to clock UART3
444 * via the FPGA and as otherwise has no pullups or pulldowns,
445 * so stop it floating.
451 * Set up registers for sleep mode.
457 PPDR |= PPC_TXD3 | PPC_TXD1;
458 PPSR |= PPC_TXD3 | PPC_TXD1;
460 sa11x0_ppc_configure_mcp();
462 if (machine_has_neponset()) {
464 * Angel sets this, but other bootloaders may not.
466 * This must precede any driver calls to BCR_set()
469 ASSABET_BCR = BCR_value = ASSABET_BCR_DB1111;
471 #ifndef CONFIG_ASSABET_NEPONSET
472 printk( "Warning: Neponset detected but full support "
473 "hasn't been configured in the kernel\n" );
475 platform_device_register_simple("neponset", 0,
476 neponset_resources, ARRAY_SIZE(neponset_resources));
480 #ifndef ASSABET_PAL_VIDEO
481 sa11x0_register_lcd(&lq039q2ds54_info);
483 sa11x0_register_lcd(&pal_video);
485 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
486 ARRAY_SIZE(assabet_flash_resources));
487 sa11x0_register_irda(&assabet_irda_data);
488 sa11x0_register_mcp(&assabet_mcp_data);
492 * On Assabet, we must probe for the Neponset board _before_
493 * paging_init() has occurred to actually determine the amount
494 * of RAM available. To do so, we map the appropriate IO section
495 * in the page table here in order to access GPIO registers.
497 static void __init map_sa1100_gpio_regs( void )
499 unsigned long phys = __PREG(GPLR) & PMD_MASK;
500 unsigned long virt = (unsigned long)io_p2v(phys);
501 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
504 pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
505 *pmd = __pmd(phys | prot);
506 flush_pmd_entry(pmd);
510 * Read System Configuration "Register"
511 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
512 * User's Guide", section 4.4.1)
514 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
515 * to set up the serial port for decompression status messages. We
516 * repeat it here because the kernel may not be loaded as a zImage, and
517 * also because it's a hassle to communicate the SCR value to the kernel
518 * from the decompressor.
520 * Note that IRQs are guaranteed to be disabled.
522 static void __init get_assabet_scr(void)
524 unsigned long uninitialized_var(scr), i;
526 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
527 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
528 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
529 for(i = 100; i--; ) /* Read GPIO 9:2 */
531 GPDR |= 0x3fc; /* restore correct pin direction */
532 scr &= 0x3fc; /* save as system configuration byte. */
537 fixup_assabet(struct tag *tags, char **cmdline, struct meminfo *mi)
539 /* This must be done before any call to machine_has_neponset() */
540 map_sa1100_gpio_regs();
543 if (machine_has_neponset())
544 printk("Neponset expansion board detected\n");
548 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
550 if (port->mapbase == _Ser1UTCR0) {
552 ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
553 ASSABET_BCR_COM_RTS |
554 ASSABET_BCR_COM_DTR);
556 ASSABET_BCR_set(ASSABET_BCR_RS232EN |
557 ASSABET_BCR_COM_RTS |
558 ASSABET_BCR_COM_DTR);
563 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
564 * and UART3 (radio module). We only handle them for UART1 here.
566 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
568 if (port->mapbase == _Ser1UTCR0) {
569 u_int set = 0, clear = 0;
571 if (mctrl & TIOCM_RTS)
572 clear |= ASSABET_BCR_COM_RTS;
574 set |= ASSABET_BCR_COM_RTS;
576 if (mctrl & TIOCM_DTR)
577 clear |= ASSABET_BCR_COM_DTR;
579 set |= ASSABET_BCR_COM_DTR;
581 ASSABET_BCR_clear(clear);
582 ASSABET_BCR_set(set);
586 static u_int assabet_get_mctrl(struct uart_port *port)
589 u_int bsr = ASSABET_BSR;
591 /* need 2 reads to read current value */
594 if (port->mapbase == _Ser1UTCR0) {
595 if (bsr & ASSABET_BSR_COM_DCD)
597 if (bsr & ASSABET_BSR_COM_CTS)
599 if (bsr & ASSABET_BSR_COM_DSR)
601 } else if (port->mapbase == _Ser3UTCR0) {
602 if (bsr & ASSABET_BSR_RAD_DCD)
604 if (bsr & ASSABET_BSR_RAD_CTS)
606 if (bsr & ASSABET_BSR_RAD_DSR)
608 if (bsr & ASSABET_BSR_RAD_RI)
611 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
617 static struct sa1100_port_fns assabet_port_fns __initdata = {
618 .set_mctrl = assabet_set_mctrl,
619 .get_mctrl = assabet_get_mctrl,
620 .pm = assabet_uart_pm,
623 static struct map_desc assabet_io_desc[] __initdata = {
624 { /* Board Control Register */
625 .virtual = 0xf1000000,
626 .pfn = __phys_to_pfn(0x12000000),
627 .length = 0x00100000,
630 .virtual = 0xf2800000,
631 .pfn = __phys_to_pfn(0x4b800000),
632 .length = 0x00800000,
637 static void __init assabet_map_io(void)
640 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
643 * Set SUS bit in SDCR0 so serial port 1 functions.
644 * Its called GPCLKR0 in my SA1110 manual.
646 Ser1SDCR0 |= SDCR0_SUS;
647 MSC1 = (MSC1 & ~0xffff) |
648 MSC_NonBrst | MSC_32BitStMem |
649 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
651 if (!machine_has_neponset())
652 sa1100_register_uart_fns(&assabet_port_fns);
655 * When Neponset is attached, the first UART should be
656 * UART3. That's what Angel is doing and many documents
659 * We do the Neponset mapping even if Neponset support
660 * isn't compiled in so the user will still get something on
661 * the expected physical serial port.
663 * We no longer do this; not all boot loaders support it,
664 * and UART3 appears to be somewhat unreliable with blob.
666 sa1100_register_uart(0, 1);
667 sa1100_register_uart(2, 3);
671 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
673 struct led_classdev cdev;
678 * The triggers lines up below will only be used if the
679 * LED triggers are compiled in.
681 static const struct {
685 { "assabet:red", "cpu0",},
686 { "assabet:green", "heartbeat", },
690 * The LED control in Assabet is reversed:
691 * - setting bit means turn off LED
692 * - clearing bit means turn on LED
694 static void assabet_led_set(struct led_classdev *cdev,
695 enum led_brightness b)
697 struct assabet_led *led = container_of(cdev,
698 struct assabet_led, cdev);
701 ASSABET_BCR_clear(led->mask);
703 ASSABET_BCR_set(led->mask);
706 static enum led_brightness assabet_led_get(struct led_classdev *cdev)
708 struct assabet_led *led = container_of(cdev,
709 struct assabet_led, cdev);
711 return (ASSABET_BCR & led->mask) ? LED_OFF : LED_FULL;
714 static int __init assabet_leds_init(void)
718 if (!machine_is_assabet())
721 for (i = 0; i < ARRAY_SIZE(assabet_leds); i++) {
722 struct assabet_led *led;
724 led = kzalloc(sizeof(*led), GFP_KERNEL);
728 led->cdev.name = assabet_leds[i].name;
729 led->cdev.brightness_set = assabet_led_set;
730 led->cdev.brightness_get = assabet_led_get;
731 led->cdev.default_trigger = assabet_leds[i].trigger;
734 led->mask = ASSABET_BCR_LED_RED;
736 led->mask = ASSABET_BCR_LED_GREEN;
738 if (led_classdev_register(NULL, &led->cdev) < 0) {
748 * Since we may have triggers on any subsystem, defer registration
749 * until after subsystem_init.
751 fs_initcall(assabet_leds_init);
754 MACHINE_START(ASSABET, "Intel-Assabet")
755 .atag_offset = 0x100,
756 .fixup = fixup_assabet,
757 .map_io = assabet_map_io,
758 .nr_irqs = SA1100_NR_IRQS,
759 .init_irq = sa1100_init_irq,
760 .init_time = sa1100_timer_init,
761 .init_machine = assabet_init,
762 .init_late = sa11x0_init_late,
764 .dma_zone_size = SZ_1M,
766 .restart = sa11x0_restart,