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/gpio/gpio-reg.h>
17 #include <linux/ioport.h>
18 #include <linux/platform_data/sa11x0-serial.h>
19 #include <linux/serial_core.h>
20 #include <linux/platform_device.h>
21 #include <linux/mfd/ucb1x00.h>
22 #include <linux/mtd/mtd.h>
23 #include <linux/mtd/partitions.h>
24 #include <linux/delay.h>
26 #include <linux/leds.h>
27 #include <linux/slab.h>
29 #include <video/sa1100fb.h>
31 #include <mach/hardware.h>
32 #include <asm/mach-types.h>
33 #include <asm/setup.h>
35 #include <asm/pgtable-hwdef.h>
36 #include <asm/pgtable.h>
37 #include <asm/tlbflush.h>
39 #include <asm/mach/arch.h>
40 #include <asm/mach/flash.h>
41 #include <linux/platform_data/irda-sa11x0.h>
42 #include <asm/mach/map.h>
43 #include <mach/assabet.h>
44 #include <linux/platform_data/mfd-mcp-sa11x0.h>
45 #include <mach/irqs.h>
49 #define ASSABET_BCR_DB1110 \
50 (ASSABET_BCR_SPK_OFF | \
51 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
52 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
55 #define ASSABET_BCR_DB1111 \
56 (ASSABET_BCR_SPK_OFF | \
57 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
58 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
59 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
60 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
62 unsigned long SCR_value = ASSABET_SCR_INIT;
63 EXPORT_SYMBOL(SCR_value);
65 static struct gpio_chip *assabet_bcr_gc;
67 static const char *assabet_names[] = {
68 "cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel",
69 "irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on",
70 "audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on",
71 "rs232_on", "nred_led", "ngreen_led", "vib_on",
72 "com_dtr", "com_rts", "radio_wake_mod", "i2c_enab",
73 "tvir_enab", "qmute", "radio_pwr_on", "spkr_off",
74 "rs232_valid", "com_dcd", "com_cts", "com_dsr",
75 "radio_cts", "radio_dsr", "radio_dcd", "radio_ri",
78 /* The old deprecated interface */
79 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
81 unsigned long m = mask, v = val;
83 assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
85 EXPORT_SYMBOL(ASSABET_BCR_frob);
87 static int __init assabet_init_gpio(void __iomem *reg, u32 def_val)
91 writel_relaxed(def_val, reg);
93 gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
94 assabet_names, NULL, NULL);
105 * The codec reset goes to three devices, so we need to release
106 * the rest when any one of these requests it. However, that
107 * causes the ADV7171 to consume around 100mA - more than half
108 * the LCD-blanked power.
110 * With the ADV7171, LCD and backlight enabled, we go over
111 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
112 * is connected, the Assabet crashes.
114 #define RST_UCB1X00 (1 << 0)
115 #define RST_UDA1341 (1 << 1)
116 #define RST_ADV7171 (1 << 2)
118 #define SDA GPIO_GPIO(15)
119 #define SCK GPIO_GPIO(18)
120 #define MOD GPIO_GPIO(17)
122 static void adv7171_start(void)
131 static void adv7171_stop(void)
139 static void adv7171_send(unsigned byte)
143 for (i = 0; i < 8; i++, byte <<= 1) {
162 printk(KERN_WARNING "No ACK from ADV7171\n");
170 static void adv7171_write(unsigned reg, unsigned val)
172 unsigned gpdr = GPDR;
173 unsigned gplr = GPLR;
175 ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
178 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
179 GPDR = (GPDR | SCK | MOD) & ~SDA;
182 printk(KERN_WARNING "Something dragging SDA down?\n");
191 /* Restore GPIO state for L3 bus */
192 GPSR = gplr & (SDA | SCK | MOD);
193 GPCR = (~gplr) & (SDA | SCK | MOD);
197 static void adv7171_sleep(void)
199 /* Put the ADV7171 into sleep mode */
200 adv7171_write(0x04, 0x40);
203 static unsigned codec_nreset;
205 static void assabet_codec_reset(unsigned mask, int set)
210 local_irq_save(flags);
213 codec_nreset &= ~mask;
215 codec_nreset |= mask;
217 if (old != !codec_nreset) {
219 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
222 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
225 local_irq_restore(flags);
228 static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
230 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
231 state == UCB_RST_PROBE_FAIL;
232 assabet_codec_reset(RST_UCB1X00, set);
235 void assabet_uda1341_reset(int set)
237 assabet_codec_reset(RST_UDA1341, set);
239 EXPORT_SYMBOL(assabet_uda1341_reset);
243 * Assabet flash support code.
248 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
250 static struct mtd_partition assabet_partitions[] = {
252 .name = "bootloader",
255 .mask_flags = MTD_WRITEABLE,
257 .name = "bootloader params",
259 .offset = MTDPART_OFS_APPEND,
260 .mask_flags = MTD_WRITEABLE,
263 .size = MTDPART_SIZ_FULL,
264 .offset = MTDPART_OFS_APPEND,
269 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
271 static struct mtd_partition assabet_partitions[] = {
273 .name = "bootloader",
276 .mask_flags = MTD_WRITEABLE,
278 .name = "bootloader params",
280 .offset = MTDPART_OFS_APPEND,
281 .mask_flags = MTD_WRITEABLE,
284 .size = MTDPART_SIZ_FULL,
285 .offset = MTDPART_OFS_APPEND,
290 static struct flash_platform_data assabet_flash_data = {
291 .map_name = "cfi_probe",
292 .parts = assabet_partitions,
293 .nr_parts = ARRAY_SIZE(assabet_partitions),
296 static struct resource assabet_flash_resources[] = {
297 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
298 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
303 * Assabet IrDA support code.
306 static int assabet_irda_set_power(struct device *dev, unsigned int state)
308 static unsigned int bcr_state[4] = {
309 ASSABET_BCR_IRDA_MD0,
310 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
311 ASSABET_BCR_IRDA_MD1,
316 ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0,
321 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
324 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
326 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
329 static struct irda_platform_data assabet_irda_data = {
330 .set_power = assabet_irda_set_power,
331 .set_speed = assabet_irda_set_speed,
334 static struct ucb1x00_plat_data assabet_ucb1x00_data = {
335 .reset = assabet_ucb1x00_reset,
340 static struct mcp_plat_data assabet_mcp_data = {
342 .sclk_rate = 11981000,
343 .codec_pdata = &assabet_ucb1x00_data,
346 static void assabet_lcd_set_visual(u32 visual)
348 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
350 if (machine_is_assabet()) {
351 #if 1 // phase 4 or newer Assabet's
353 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
355 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
359 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
361 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
366 #ifndef ASSABET_PAL_VIDEO
367 static void assabet_lcd_backlight_power(int on)
370 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
372 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
376 * Turn on/off the backlight. When turning the backlight on, we wait
377 * 500us after turning it on so we don't cause the supplies to droop
378 * when we enable the LCD controller (and cause a hard reset.)
380 static void assabet_lcd_power(int on)
383 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
386 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
390 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
391 * takes an RGB666 signal, but we provide it with an RGB565 signal
392 * instead (def_rgb_16).
394 static struct sa1100fb_mach_info lq039q2ds54_info = {
395 .pixclock = 171521, .bpp = 16,
396 .xres = 320, .yres = 240,
398 .hsync_len = 5, .vsync_len = 1,
399 .left_margin = 61, .upper_margin = 3,
400 .right_margin = 9, .lower_margin = 0,
402 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
404 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
405 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
407 .backlight_power = assabet_lcd_backlight_power,
408 .lcd_power = assabet_lcd_power,
409 .set_visual = assabet_lcd_set_visual,
412 static void assabet_pal_backlight_power(int on)
414 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
417 static void assabet_pal_power(int on)
419 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
422 static struct sa1100fb_mach_info pal_info = {
423 .pixclock = 67797, .bpp = 16,
424 .xres = 640, .yres = 512,
426 .hsync_len = 64, .vsync_len = 6,
427 .left_margin = 125, .upper_margin = 70,
428 .right_margin = 115, .lower_margin = 36,
430 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
431 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
433 .backlight_power = assabet_pal_backlight_power,
434 .lcd_power = assabet_pal_power,
435 .set_visual = assabet_lcd_set_visual,
439 #ifdef CONFIG_ASSABET_NEPONSET
440 static struct resource neponset_resources[] = {
441 DEFINE_RES_MEM(0x10000000, 0x08000000),
442 DEFINE_RES_MEM(0x18000000, 0x04000000),
443 DEFINE_RES_MEM(0x40000000, SZ_8K),
444 DEFINE_RES_IRQ(IRQ_GPIO25),
448 static void __init assabet_init(void)
451 * Ensure that the power supply is in "high power" mode.
457 * Ensure that these pins are set as outputs and are driving
458 * logic 0. This ensures that we won't inadvertently toggle
459 * the WS latch in the CPLD, and we don't float causing
460 * excessive power drain. --rmk
462 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
463 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
466 * Also set GPIO27 as an output; this is used to clock UART3
467 * via the FPGA and as otherwise has no pullups or pulldowns,
468 * so stop it floating.
474 * Set up registers for sleep mode.
480 PPDR |= PPC_TXD3 | PPC_TXD1;
481 PPSR |= PPC_TXD3 | PPC_TXD1;
483 sa11x0_ppc_configure_mcp();
485 if (machine_has_neponset()) {
486 #ifndef CONFIG_ASSABET_NEPONSET
487 printk( "Warning: Neponset detected but full support "
488 "hasn't been configured in the kernel\n" );
490 platform_device_register_simple("neponset", 0,
491 neponset_resources, ARRAY_SIZE(neponset_resources));
495 #ifndef ASSABET_PAL_VIDEO
496 sa11x0_register_lcd(&lq039q2ds54_info);
498 sa11x0_register_lcd(&pal_video);
500 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
501 ARRAY_SIZE(assabet_flash_resources));
502 sa11x0_register_irda(&assabet_irda_data);
503 sa11x0_register_mcp(&assabet_mcp_data);
507 * On Assabet, we must probe for the Neponset board _before_
508 * paging_init() has occurred to actually determine the amount
509 * of RAM available. To do so, we map the appropriate IO section
510 * in the page table here in order to access GPIO registers.
512 static void __init map_sa1100_gpio_regs( void )
514 unsigned long phys = __PREG(GPLR) & PMD_MASK;
515 unsigned long virt = (unsigned long)io_p2v(phys);
516 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
519 pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
520 *pmd = __pmd(phys | prot);
521 flush_pmd_entry(pmd);
525 * Read System Configuration "Register"
526 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
527 * User's Guide", section 4.4.1)
529 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
530 * to set up the serial port for decompression status messages. We
531 * repeat it here because the kernel may not be loaded as a zImage, and
532 * also because it's a hassle to communicate the SCR value to the kernel
533 * from the decompressor.
535 * Note that IRQs are guaranteed to be disabled.
537 static void __init get_assabet_scr(void)
539 unsigned long uninitialized_var(scr), i;
541 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
542 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
543 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
544 for(i = 100; i--; ) /* Read GPIO 9:2 */
546 GPDR |= 0x3fc; /* restore correct pin direction */
547 scr &= 0x3fc; /* save as system configuration byte. */
552 fixup_assabet(struct tag *tags, char **cmdline)
554 /* This must be done before any call to machine_has_neponset() */
555 map_sa1100_gpio_regs();
558 if (machine_has_neponset())
559 printk("Neponset expansion board detected\n");
563 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
565 if (port->mapbase == _Ser1UTCR0) {
567 ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
568 ASSABET_BCR_COM_RTS |
569 ASSABET_BCR_COM_DTR);
571 ASSABET_BCR_set(ASSABET_BCR_RS232EN |
572 ASSABET_BCR_COM_RTS |
573 ASSABET_BCR_COM_DTR);
578 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
579 * and UART3 (radio module). We only handle them for UART1 here.
581 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
583 if (port->mapbase == _Ser1UTCR0) {
584 u_int set = 0, clear = 0;
586 if (mctrl & TIOCM_RTS)
587 clear |= ASSABET_BCR_COM_RTS;
589 set |= ASSABET_BCR_COM_RTS;
591 if (mctrl & TIOCM_DTR)
592 clear |= ASSABET_BCR_COM_DTR;
594 set |= ASSABET_BCR_COM_DTR;
596 ASSABET_BCR_clear(clear);
597 ASSABET_BCR_set(set);
601 static u_int assabet_get_mctrl(struct uart_port *port)
604 u_int bsr = ASSABET_BSR;
606 /* need 2 reads to read current value */
609 if (port->mapbase == _Ser1UTCR0) {
610 if (bsr & ASSABET_BSR_COM_DCD)
612 if (bsr & ASSABET_BSR_COM_CTS)
614 if (bsr & ASSABET_BSR_COM_DSR)
616 } else if (port->mapbase == _Ser3UTCR0) {
617 if (bsr & ASSABET_BSR_RAD_DCD)
619 if (bsr & ASSABET_BSR_RAD_CTS)
621 if (bsr & ASSABET_BSR_RAD_DSR)
623 if (bsr & ASSABET_BSR_RAD_RI)
626 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
632 static struct sa1100_port_fns assabet_port_fns __initdata = {
633 .set_mctrl = assabet_set_mctrl,
634 .get_mctrl = assabet_get_mctrl,
635 .pm = assabet_uart_pm,
638 static struct map_desc assabet_io_desc[] __initdata = {
639 { /* Board Control Register */
640 .virtual = 0xf1000000,
641 .pfn = __phys_to_pfn(0x12000000),
642 .length = 0x00100000,
645 .virtual = 0xf2800000,
646 .pfn = __phys_to_pfn(0x4b800000),
647 .length = 0x00800000,
652 static void __init assabet_map_io(void)
655 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
658 * Set SUS bit in SDCR0 so serial port 1 functions.
659 * Its called GPCLKR0 in my SA1110 manual.
661 Ser1SDCR0 |= SDCR0_SUS;
662 MSC1 = (MSC1 & ~0xffff) |
663 MSC_NonBrst | MSC_32BitStMem |
664 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
666 if (!machine_has_neponset())
667 sa1100_register_uart_fns(&assabet_port_fns);
670 * When Neponset is attached, the first UART should be
671 * UART3. That's what Angel is doing and many documents
674 * We do the Neponset mapping even if Neponset support
675 * isn't compiled in so the user will still get something on
676 * the expected physical serial port.
678 * We no longer do this; not all boot loaders support it,
679 * and UART3 appears to be somewhat unreliable with blob.
681 sa1100_register_uart(0, 1);
682 sa1100_register_uart(2, 3);
686 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
688 struct led_classdev cdev;
693 * The triggers lines up below will only be used if the
694 * LED triggers are compiled in.
696 static const struct {
700 { "assabet:red", "cpu0",},
701 { "assabet:green", "heartbeat", },
705 * The LED control in Assabet is reversed:
706 * - setting bit means turn off LED
707 * - clearing bit means turn on LED
709 static void assabet_led_set(struct led_classdev *cdev,
710 enum led_brightness b)
712 struct assabet_led *led = container_of(cdev,
713 struct assabet_led, cdev);
716 ASSABET_BCR_clear(led->mask);
718 ASSABET_BCR_set(led->mask);
721 static enum led_brightness assabet_led_get(struct led_classdev *cdev)
723 struct assabet_led *led = container_of(cdev,
724 struct assabet_led, cdev);
726 return (ASSABET_BCR & led->mask) ? LED_OFF : LED_FULL;
729 static int __init assabet_leds_init(void)
733 if (!machine_is_assabet())
736 for (i = 0; i < ARRAY_SIZE(assabet_leds); i++) {
737 struct assabet_led *led;
739 led = kzalloc(sizeof(*led), GFP_KERNEL);
743 led->cdev.name = assabet_leds[i].name;
744 led->cdev.brightness_set = assabet_led_set;
745 led->cdev.brightness_get = assabet_led_get;
746 led->cdev.default_trigger = assabet_leds[i].trigger;
749 led->mask = ASSABET_BCR_LED_RED;
751 led->mask = ASSABET_BCR_LED_GREEN;
753 if (led_classdev_register(NULL, &led->cdev) < 0) {
763 * Since we may have triggers on any subsystem, defer registration
764 * until after subsystem_init.
766 fs_initcall(assabet_leds_init);
769 void __init assabet_init_irq(void)
775 if (machine_has_neponset())
776 def_val = ASSABET_BCR_DB1111;
778 def_val = ASSABET_BCR_DB1110;
781 * Angel sets this, but other bootloaders may not.
783 * This must precede any driver calls to BCR_set() or BCR_clear().
785 assabet_init_gpio((void *)&ASSABET_BCR, def_val);
788 MACHINE_START(ASSABET, "Intel-Assabet")
789 .atag_offset = 0x100,
790 .fixup = fixup_assabet,
791 .map_io = assabet_map_io,
792 .nr_irqs = SA1100_NR_IRQS,
793 .init_irq = assabet_init_irq,
794 .init_time = sa1100_timer_init,
795 .init_machine = assabet_init,
796 .init_late = sa11x0_init_late,
798 .dma_zone_size = SZ_1M,
800 .restart = sa11x0_restart,