1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-sa1100/assabet.c
5 * Author: Nicolas Pitre
7 * This file contains all Assabet-specific tweaks.
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/errno.h>
13 #include <linux/gpio/gpio-reg.h>
14 #include <linux/gpio/machine.h>
15 #include <linux/gpio_keys.h>
16 #include <linux/ioport.h>
17 #include <linux/platform_data/sa11x0-serial.h>
18 #include <linux/regulator/fixed.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/serial_core.h>
21 #include <linux/platform_device.h>
22 #include <linux/mfd/ucb1x00.h>
23 #include <linux/mtd/mtd.h>
24 #include <linux/mtd/partitions.h>
25 #include <linux/delay.h>
27 #include <linux/leds.h>
28 #include <linux/slab.h>
30 #include <video/sa1100fb.h>
32 #include <mach/hardware.h>
33 #include <asm/mach-types.h>
34 #include <asm/setup.h>
36 #include <asm/pgtable-hwdef.h>
37 #include <asm/pgtable.h>
38 #include <asm/tlbflush.h>
40 #include <asm/mach/arch.h>
41 #include <asm/mach/flash.h>
42 #include <linux/platform_data/irda-sa11x0.h>
43 #include <asm/mach/map.h>
44 #include <mach/assabet.h>
45 #include <linux/platform_data/mfd-mcp-sa11x0.h>
46 #include <mach/irqs.h>
50 #define ASSABET_BCR_DB1110 \
51 (ASSABET_BCR_SPK_OFF | \
52 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
53 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
56 #define ASSABET_BCR_DB1111 \
57 (ASSABET_BCR_SPK_OFF | \
58 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \
59 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \
60 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
61 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST)
63 unsigned long SCR_value = ASSABET_SCR_INIT;
64 EXPORT_SYMBOL(SCR_value);
66 static struct gpio_chip *assabet_bcr_gc;
68 static const char *assabet_names[] = {
69 "cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel",
70 "irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on",
71 "audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on",
72 "rs232_on", "nred_led", "ngreen_led", "vib_on",
73 "com_dtr", "com_rts", "radio_wake_mod", "i2c_enab",
74 "tvir_enab", "qmute", "radio_pwr_on", "spkr_off",
75 "rs232_valid", "com_dcd", "com_cts", "com_dsr",
76 "radio_cts", "radio_dsr", "radio_dcd", "radio_ri",
79 /* The old deprecated interface */
80 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
82 unsigned long m = mask, v = val;
84 assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
86 EXPORT_SYMBOL(ASSABET_BCR_frob);
88 static int __init assabet_init_gpio(void __iomem *reg, u32 def_val)
92 writel_relaxed(def_val, reg);
94 gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
95 assabet_names, NULL, NULL);
106 * The codec reset goes to three devices, so we need to release
107 * the rest when any one of these requests it. However, that
108 * causes the ADV7171 to consume around 100mA - more than half
109 * the LCD-blanked power.
111 * With the ADV7171, LCD and backlight enabled, we go over
112 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
113 * is connected, the Assabet crashes.
115 #define RST_UCB1X00 (1 << 0)
116 #define RST_UDA1341 (1 << 1)
117 #define RST_ADV7171 (1 << 2)
119 #define SDA GPIO_GPIO(15)
120 #define SCK GPIO_GPIO(18)
121 #define MOD GPIO_GPIO(17)
123 static void adv7171_start(void)
132 static void adv7171_stop(void)
140 static void adv7171_send(unsigned byte)
144 for (i = 0; i < 8; i++, byte <<= 1) {
163 printk(KERN_WARNING "No ACK from ADV7171\n");
171 static void adv7171_write(unsigned reg, unsigned val)
173 unsigned gpdr = GPDR;
174 unsigned gplr = GPLR;
176 ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
179 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
180 GPDR = (GPDR | SCK | MOD) & ~SDA;
183 printk(KERN_WARNING "Something dragging SDA down?\n");
192 /* Restore GPIO state for L3 bus */
193 GPSR = gplr & (SDA | SCK | MOD);
194 GPCR = (~gplr) & (SDA | SCK | MOD);
198 static void adv7171_sleep(void)
200 /* Put the ADV7171 into sleep mode */
201 adv7171_write(0x04, 0x40);
204 static unsigned codec_nreset;
206 static void assabet_codec_reset(unsigned mask, int set)
211 local_irq_save(flags);
214 codec_nreset &= ~mask;
216 codec_nreset |= mask;
218 if (old != !codec_nreset) {
220 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
223 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
226 local_irq_restore(flags);
229 static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
231 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
232 state == UCB_RST_PROBE_FAIL;
233 assabet_codec_reset(RST_UCB1X00, set);
236 void assabet_uda1341_reset(int set)
238 assabet_codec_reset(RST_UDA1341, set);
240 EXPORT_SYMBOL(assabet_uda1341_reset);
244 * Assabet flash support code.
249 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
251 static struct mtd_partition assabet_partitions[] = {
253 .name = "bootloader",
256 .mask_flags = MTD_WRITEABLE,
258 .name = "bootloader params",
260 .offset = MTDPART_OFS_APPEND,
261 .mask_flags = MTD_WRITEABLE,
264 .size = MTDPART_SIZ_FULL,
265 .offset = MTDPART_OFS_APPEND,
270 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
272 static struct mtd_partition assabet_partitions[] = {
274 .name = "bootloader",
277 .mask_flags = MTD_WRITEABLE,
279 .name = "bootloader params",
281 .offset = MTDPART_OFS_APPEND,
282 .mask_flags = MTD_WRITEABLE,
285 .size = MTDPART_SIZ_FULL,
286 .offset = MTDPART_OFS_APPEND,
291 static struct flash_platform_data assabet_flash_data = {
292 .map_name = "cfi_probe",
293 .parts = assabet_partitions,
294 .nr_parts = ARRAY_SIZE(assabet_partitions),
297 static struct resource assabet_flash_resources[] = {
298 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
299 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
304 * Assabet IrDA support code.
307 static int assabet_irda_set_power(struct device *dev, unsigned int state)
309 static unsigned int bcr_state[4] = {
310 ASSABET_BCR_IRDA_MD0,
311 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
312 ASSABET_BCR_IRDA_MD1,
317 ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0,
322 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
325 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
327 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
330 static struct irda_platform_data assabet_irda_data = {
331 .set_power = assabet_irda_set_power,
332 .set_speed = assabet_irda_set_speed,
335 static struct ucb1x00_plat_data assabet_ucb1x00_data = {
336 .reset = assabet_ucb1x00_reset,
341 static struct mcp_plat_data assabet_mcp_data = {
343 .sclk_rate = 11981000,
344 .codec_pdata = &assabet_ucb1x00_data,
347 static void assabet_lcd_set_visual(u32 visual)
349 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
351 if (machine_is_assabet()) {
352 #if 1 // phase 4 or newer Assabet's
354 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
356 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
360 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
362 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
367 #ifndef ASSABET_PAL_VIDEO
368 static void assabet_lcd_backlight_power(int on)
371 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
373 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
377 * Turn on/off the backlight. When turning the backlight on, we wait
378 * 500us after turning it on so we don't cause the supplies to droop
379 * when we enable the LCD controller (and cause a hard reset.)
381 static void assabet_lcd_power(int on)
384 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
387 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
391 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
392 * takes an RGB666 signal, but we provide it with an RGB565 signal
393 * instead (def_rgb_16).
395 static struct sa1100fb_mach_info lq039q2ds54_info = {
396 .pixclock = 171521, .bpp = 16,
397 .xres = 320, .yres = 240,
399 .hsync_len = 5, .vsync_len = 1,
400 .left_margin = 61, .upper_margin = 3,
401 .right_margin = 9, .lower_margin = 0,
403 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
405 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
406 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
408 .backlight_power = assabet_lcd_backlight_power,
409 .lcd_power = assabet_lcd_power,
410 .set_visual = assabet_lcd_set_visual,
413 static void assabet_pal_backlight_power(int on)
415 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
418 static void assabet_pal_power(int on)
420 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
423 static struct sa1100fb_mach_info pal_info = {
424 .pixclock = 67797, .bpp = 16,
425 .xres = 640, .yres = 512,
427 .hsync_len = 64, .vsync_len = 6,
428 .left_margin = 125, .upper_margin = 70,
429 .right_margin = 115, .lower_margin = 36,
431 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
432 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
434 .backlight_power = assabet_pal_backlight_power,
435 .lcd_power = assabet_pal_power,
436 .set_visual = assabet_lcd_set_visual,
440 #ifdef CONFIG_ASSABET_NEPONSET
441 static struct resource neponset_resources[] = {
442 DEFINE_RES_MEM(0x10000000, 0x08000000),
443 DEFINE_RES_MEM(0x18000000, 0x04000000),
444 DEFINE_RES_MEM(0x40000000, SZ_8K),
445 DEFINE_RES_IRQ(IRQ_GPIO25),
449 static struct gpiod_lookup_table assabet_cf_gpio_table = {
450 .dev_id = "sa11x0-pcmcia.1",
452 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
453 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
454 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
455 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
456 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
457 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
462 static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
463 REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
466 static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
467 .supply_name = "cf-power",
468 .microvolts = 3300000,
471 static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
472 .dev_id = "reg-fixed-voltage.0",
474 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH),
479 static struct gpio_led assabet_leds[] __initdata = {
481 .name = "assabet:red",
482 .default_trigger = "cpu0",
484 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
486 .name = "assabet:green",
487 .default_trigger = "heartbeat",
489 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
493 static const struct gpio_led_platform_data assabet_leds_pdata __initconst = {
494 .num_leds = ARRAY_SIZE(assabet_leds),
495 .leds = assabet_leds,
498 static struct gpio_keys_button assabet_keys_buttons[] = {
505 .debounce_interval = 5,
512 .debounce_interval = 5,
516 static const struct gpio_keys_platform_data assabet_keys_pdata = {
517 .buttons = assabet_keys_buttons,
518 .nbuttons = ARRAY_SIZE(assabet_keys_buttons),
522 static void __init assabet_init(void)
525 * Ensure that the power supply is in "high power" mode.
531 * Ensure that these pins are set as outputs and are driving
532 * logic 0. This ensures that we won't inadvertently toggle
533 * the WS latch in the CPLD, and we don't float causing
534 * excessive power drain. --rmk
536 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
537 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
540 * Also set GPIO27 as an output; this is used to clock UART3
541 * via the FPGA and as otherwise has no pullups or pulldowns,
542 * so stop it floating.
548 * Set up registers for sleep mode.
554 PPDR |= PPC_TXD3 | PPC_TXD1;
555 PPSR |= PPC_TXD3 | PPC_TXD1;
557 sa11x0_ppc_configure_mcp();
559 if (machine_has_neponset()) {
560 #ifndef CONFIG_ASSABET_NEPONSET
561 printk( "Warning: Neponset detected but full support "
562 "hasn't been configured in the kernel\n" );
564 platform_device_register_simple("neponset", 0,
565 neponset_resources, ARRAY_SIZE(neponset_resources));
568 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);
569 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
570 assabet_cf_vcc_consumers,
571 ARRAY_SIZE(assabet_cf_vcc_consumers),
576 platform_device_register_resndata(NULL, "gpio-keys", 0,
579 sizeof(assabet_keys_pdata));
581 gpio_led_register_device(-1, &assabet_leds_pdata);
583 #ifndef ASSABET_PAL_VIDEO
584 sa11x0_register_lcd(&lq039q2ds54_info);
586 sa11x0_register_lcd(&pal_video);
588 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
589 ARRAY_SIZE(assabet_flash_resources));
590 sa11x0_register_irda(&assabet_irda_data);
591 sa11x0_register_mcp(&assabet_mcp_data);
593 if (!machine_has_neponset())
594 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
598 * On Assabet, we must probe for the Neponset board _before_
599 * paging_init() has occurred to actually determine the amount
600 * of RAM available. To do so, we map the appropriate IO section
601 * in the page table here in order to access GPIO registers.
603 static void __init map_sa1100_gpio_regs( void )
605 unsigned long phys = __PREG(GPLR) & PMD_MASK;
606 unsigned long virt = (unsigned long)io_p2v(phys);
607 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
610 pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
611 *pmd = __pmd(phys | prot);
612 flush_pmd_entry(pmd);
616 * Read System Configuration "Register"
617 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
618 * User's Guide", section 4.4.1)
620 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
621 * to set up the serial port for decompression status messages. We
622 * repeat it here because the kernel may not be loaded as a zImage, and
623 * also because it's a hassle to communicate the SCR value to the kernel
624 * from the decompressor.
626 * Note that IRQs are guaranteed to be disabled.
628 static void __init get_assabet_scr(void)
630 unsigned long uninitialized_var(scr), i;
632 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
633 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
634 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
635 for(i = 100; i--; ) /* Read GPIO 9:2 */
637 GPDR |= 0x3fc; /* restore correct pin direction */
638 scr &= 0x3fc; /* save as system configuration byte. */
643 fixup_assabet(struct tag *tags, char **cmdline)
645 /* This must be done before any call to machine_has_neponset() */
646 map_sa1100_gpio_regs();
649 if (machine_has_neponset())
650 printk("Neponset expansion board detected\n");
654 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
656 if (port->mapbase == _Ser1UTCR0) {
658 ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
659 ASSABET_BCR_COM_RTS |
660 ASSABET_BCR_COM_DTR);
662 ASSABET_BCR_set(ASSABET_BCR_RS232EN |
663 ASSABET_BCR_COM_RTS |
664 ASSABET_BCR_COM_DTR);
669 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
670 * and UART3 (radio module). We only handle them for UART1 here.
672 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
674 if (port->mapbase == _Ser1UTCR0) {
675 u_int set = 0, clear = 0;
677 if (mctrl & TIOCM_RTS)
678 clear |= ASSABET_BCR_COM_RTS;
680 set |= ASSABET_BCR_COM_RTS;
682 if (mctrl & TIOCM_DTR)
683 clear |= ASSABET_BCR_COM_DTR;
685 set |= ASSABET_BCR_COM_DTR;
687 ASSABET_BCR_clear(clear);
688 ASSABET_BCR_set(set);
692 static u_int assabet_get_mctrl(struct uart_port *port)
695 u_int bsr = ASSABET_BSR;
697 /* need 2 reads to read current value */
700 if (port->mapbase == _Ser1UTCR0) {
701 if (bsr & ASSABET_BSR_COM_DCD)
703 if (bsr & ASSABET_BSR_COM_CTS)
705 if (bsr & ASSABET_BSR_COM_DSR)
707 } else if (port->mapbase == _Ser3UTCR0) {
708 if (bsr & ASSABET_BSR_RAD_DCD)
710 if (bsr & ASSABET_BSR_RAD_CTS)
712 if (bsr & ASSABET_BSR_RAD_DSR)
714 if (bsr & ASSABET_BSR_RAD_RI)
717 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
723 static struct sa1100_port_fns assabet_port_fns __initdata = {
724 .set_mctrl = assabet_set_mctrl,
725 .get_mctrl = assabet_get_mctrl,
726 .pm = assabet_uart_pm,
729 static struct map_desc assabet_io_desc[] __initdata = {
730 { /* Board Control Register */
731 .virtual = 0xf1000000,
732 .pfn = __phys_to_pfn(0x12000000),
733 .length = 0x00100000,
736 .virtual = 0xf2800000,
737 .pfn = __phys_to_pfn(0x4b800000),
738 .length = 0x00800000,
743 static void __init assabet_map_io(void)
746 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
749 * Set SUS bit in SDCR0 so serial port 1 functions.
750 * Its called GPCLKR0 in my SA1110 manual.
752 Ser1SDCR0 |= SDCR0_SUS;
753 MSC1 = (MSC1 & ~0xffff) |
754 MSC_NonBrst | MSC_32BitStMem |
755 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
757 if (!machine_has_neponset())
758 sa1100_register_uart_fns(&assabet_port_fns);
761 * When Neponset is attached, the first UART should be
762 * UART3. That's what Angel is doing and many documents
765 * We do the Neponset mapping even if Neponset support
766 * isn't compiled in so the user will still get something on
767 * the expected physical serial port.
769 * We no longer do this; not all boot loaders support it,
770 * and UART3 appears to be somewhat unreliable with blob.
772 sa1100_register_uart(0, 1);
773 sa1100_register_uart(2, 3);
776 void __init assabet_init_irq(void)
778 unsigned int assabet_gpio_base;
783 if (machine_has_neponset())
784 def_val = ASSABET_BCR_DB1111;
786 def_val = ASSABET_BCR_DB1110;
789 * Angel sets this, but other bootloaders may not.
791 * This must precede any driver calls to BCR_set() or BCR_clear().
793 assabet_gpio_base = assabet_init_gpio((void *)&ASSABET_BCR, def_val);
795 assabet_leds[0].gpio = assabet_gpio_base + 13;
796 assabet_leds[1].gpio = assabet_gpio_base + 14;
799 MACHINE_START(ASSABET, "Intel-Assabet")
800 .atag_offset = 0x100,
801 .fixup = fixup_assabet,
802 .map_io = assabet_map_io,
803 .nr_irqs = SA1100_NR_IRQS,
804 .init_irq = assabet_init_irq,
805 .init_time = sa1100_timer_init,
806 .init_machine = assabet_init,
807 .init_late = sa11x0_init_late,
809 .dma_zone_size = SZ_1M,
811 .restart = sa11x0_restart,