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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-sa1100/assabet.c
4 *
5 * Author: Nicolas Pitre
6 *
7 * This file contains all Assabet-specific tweaks.
8 */
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/errno.h>
13#include <linux/gpio/driver.h>
14#include <linux/gpio/gpio-reg.h>
15#include <linux/gpio/machine.h>
16#include <linux/gpio_keys.h>
17#include <linux/ioport.h>
18#include <linux/platform_data/sa11x0-serial.h>
19#include <linux/regulator/fixed.h>
20#include <linux/regulator/machine.h>
21#include <linux/serial_core.h>
22#include <linux/platform_device.h>
23#include <linux/mfd/ucb1x00.h>
24#include <linux/mtd/mtd.h>
25#include <linux/mtd/partitions.h>
26#include <linux/delay.h>
27#include <linux/mm.h>
28#include <linux/leds.h>
29#include <linux/slab.h>
30
31#include <video/sa1100fb.h>
32
33#include <mach/hardware.h>
34#include <asm/mach-types.h>
35#include <asm/setup.h>
36#include <asm/page.h>
37#include <asm/pgtable-hwdef.h>
38#include <asm/tlbflush.h>
39
40#include <asm/mach/arch.h>
41#include <asm/mach/flash.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>
46
47#include "generic.h"
48
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 | \
53 ASSABET_BCR_IRDA_MD0)
54
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)
61
62unsigned long SCR_value = ASSABET_SCR_INIT;
63EXPORT_SYMBOL(SCR_value);
64
65static struct gpio_chip *assabet_bcr_gc;
66
67static 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",
76};
77
78/* The old deprecated interface */
79void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
80{
81 unsigned long m = mask, v = val;
82
83 assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
84}
85EXPORT_SYMBOL(ASSABET_BCR_frob);
86
87static void __init assabet_init_gpio(void __iomem *reg, u32 def_val)
88{
89 struct gpio_chip *gc;
90
91 writel_relaxed(def_val, reg);
92
93 gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
94 assabet_names, NULL, NULL);
95
96 if (IS_ERR(gc))
97 return;
98
99 assabet_bcr_gc = gc;
100}
101
102/*
103 * The codec reset goes to three devices, so we need to release
104 * the rest when any one of these requests it. However, that
105 * causes the ADV7171 to consume around 100mA - more than half
106 * the LCD-blanked power.
107 *
108 * With the ADV7171, LCD and backlight enabled, we go over
109 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
110 * is connected, the Assabet crashes.
111 */
112#define RST_UCB1X00 (1 << 0)
113#define RST_UDA1341 (1 << 1)
114#define RST_ADV7171 (1 << 2)
115
116#define SDA GPIO_GPIO(15)
117#define SCK GPIO_GPIO(18)
118#define MOD GPIO_GPIO(17)
119
120static void adv7171_start(void)
121{
122 GPSR = SCK;
123 udelay(1);
124 GPSR = SDA;
125 udelay(2);
126 GPCR = SDA;
127}
128
129static void adv7171_stop(void)
130{
131 GPSR = SCK;
132 udelay(2);
133 GPSR = SDA;
134 udelay(1);
135}
136
137static void adv7171_send(unsigned byte)
138{
139 unsigned i;
140
141 for (i = 0; i < 8; i++, byte <<= 1) {
142 GPCR = SCK;
143 udelay(1);
144 if (byte & 0x80)
145 GPSR = SDA;
146 else
147 GPCR = SDA;
148 udelay(1);
149 GPSR = SCK;
150 udelay(1);
151 }
152 GPCR = SCK;
153 udelay(1);
154 GPSR = SDA;
155 udelay(1);
156 GPDR &= ~SDA;
157 GPSR = SCK;
158 udelay(1);
159 if (GPLR & SDA)
160 printk(KERN_WARNING "No ACK from ADV7171\n");
161 udelay(1);
162 GPCR = SCK | SDA;
163 udelay(1);
164 GPDR |= SDA;
165 udelay(1);
166}
167
168static void adv7171_write(unsigned reg, unsigned val)
169{
170 unsigned gpdr = GPDR;
171 unsigned gplr = GPLR;
172
173 ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
174 udelay(100);
175
176 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
177 GPDR = (GPDR | SCK | MOD) & ~SDA;
178 udelay(10);
179 if (!(GPLR & SDA))
180 printk(KERN_WARNING "Something dragging SDA down?\n");
181 GPDR |= SDA;
182
183 adv7171_start();
184 adv7171_send(0x54);
185 adv7171_send(reg);
186 adv7171_send(val);
187 adv7171_stop();
188
189 /* Restore GPIO state for L3 bus */
190 GPSR = gplr & (SDA | SCK | MOD);
191 GPCR = (~gplr) & (SDA | SCK | MOD);
192 GPDR = gpdr;
193}
194
195static void adv7171_sleep(void)
196{
197 /* Put the ADV7171 into sleep mode */
198 adv7171_write(0x04, 0x40);
199}
200
201static unsigned codec_nreset;
202
203static void assabet_codec_reset(unsigned mask, int set)
204{
205 unsigned long flags;
206 bool old;
207
208 local_irq_save(flags);
209 old = !codec_nreset;
210 if (set)
211 codec_nreset &= ~mask;
212 else
213 codec_nreset |= mask;
214
215 if (old != !codec_nreset) {
216 if (codec_nreset) {
217 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
218 adv7171_sleep();
219 } else {
220 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
221 }
222 }
223 local_irq_restore(flags);
224}
225
226static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
227{
228 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
229 state == UCB_RST_PROBE_FAIL;
230 assabet_codec_reset(RST_UCB1X00, set);
231}
232
233void assabet_uda1341_reset(int set)
234{
235 assabet_codec_reset(RST_UDA1341, set);
236}
237EXPORT_SYMBOL(assabet_uda1341_reset);
238
239
240/*
241 * Assabet flash support code.
242 */
243
244#ifdef ASSABET_REV_4
245/*
246 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
247 */
248static struct mtd_partition assabet_partitions[] = {
249 {
250 .name = "bootloader",
251 .size = 0x00020000,
252 .offset = 0,
253 .mask_flags = MTD_WRITEABLE,
254 }, {
255 .name = "bootloader params",
256 .size = 0x00020000,
257 .offset = MTDPART_OFS_APPEND,
258 .mask_flags = MTD_WRITEABLE,
259 }, {
260 .name = "jffs",
261 .size = MTDPART_SIZ_FULL,
262 .offset = MTDPART_OFS_APPEND,
263 }
264};
265#else
266/*
267 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
268 */
269static struct mtd_partition assabet_partitions[] = {
270 {
271 .name = "bootloader",
272 .size = 0x00040000,
273 .offset = 0,
274 .mask_flags = MTD_WRITEABLE,
275 }, {
276 .name = "bootloader params",
277 .size = 0x00040000,
278 .offset = MTDPART_OFS_APPEND,
279 .mask_flags = MTD_WRITEABLE,
280 }, {
281 .name = "jffs",
282 .size = MTDPART_SIZ_FULL,
283 .offset = MTDPART_OFS_APPEND,
284 }
285};
286#endif
287
288static struct flash_platform_data assabet_flash_data = {
289 .map_name = "cfi_probe",
290 .parts = assabet_partitions,
291 .nr_parts = ARRAY_SIZE(assabet_partitions),
292};
293
294static struct resource assabet_flash_resources[] = {
295 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
296 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
297};
298
299
300static struct ucb1x00_plat_data assabet_ucb1x00_data = {
301 .reset = assabet_ucb1x00_reset,
302 .gpio_base = -1,
303 .can_wakeup = 1,
304};
305
306static struct mcp_plat_data assabet_mcp_data = {
307 .mccr0 = MCCR0_ADM,
308 .sclk_rate = 11981000,
309 .codec_pdata = &assabet_ucb1x00_data,
310};
311
312static void assabet_lcd_set_visual(u32 visual)
313{
314 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
315
316 if (machine_is_assabet()) {
317#if 1 // phase 4 or newer Assabet's
318 if (is_true_color)
319 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
320 else
321 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
322#else
323 // older Assabet's
324 if (is_true_color)
325 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
326 else
327 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
328#endif
329 }
330}
331
332#ifndef ASSABET_PAL_VIDEO
333static void assabet_lcd_backlight_power(int on)
334{
335 if (on)
336 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
337 else
338 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
339}
340
341/*
342 * Turn on/off the backlight. When turning the backlight on, we wait
343 * 500us after turning it on so we don't cause the supplies to droop
344 * when we enable the LCD controller (and cause a hard reset.)
345 */
346static void assabet_lcd_power(int on)
347{
348 if (on) {
349 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
350 udelay(500);
351 } else
352 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
353}
354
355/*
356 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
357 * takes an RGB666 signal, but we provide it with an RGB565 signal
358 * instead (def_rgb_16).
359 */
360static struct sa1100fb_mach_info lq039q2ds54_info = {
361 .pixclock = 171521, .bpp = 16,
362 .xres = 320, .yres = 240,
363
364 .hsync_len = 5, .vsync_len = 1,
365 .left_margin = 61, .upper_margin = 3,
366 .right_margin = 9, .lower_margin = 0,
367
368 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
369
370 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
371 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
372
373 .backlight_power = assabet_lcd_backlight_power,
374 .lcd_power = assabet_lcd_power,
375 .set_visual = assabet_lcd_set_visual,
376};
377#else
378static void assabet_pal_backlight_power(int on)
379{
380 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
381}
382
383static void assabet_pal_power(int on)
384{
385 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
386}
387
388static struct sa1100fb_mach_info pal_info = {
389 .pixclock = 67797, .bpp = 16,
390 .xres = 640, .yres = 512,
391
392 .hsync_len = 64, .vsync_len = 6,
393 .left_margin = 125, .upper_margin = 70,
394 .right_margin = 115, .lower_margin = 36,
395
396 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
397 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
398
399 .backlight_power = assabet_pal_backlight_power,
400 .lcd_power = assabet_pal_power,
401 .set_visual = assabet_lcd_set_visual,
402};
403#endif
404
405#ifdef CONFIG_ASSABET_NEPONSET
406static struct resource neponset_resources[] = {
407 DEFINE_RES_MEM(0x10000000, 0x08000000),
408 DEFINE_RES_MEM(0x18000000, 0x04000000),
409 DEFINE_RES_MEM(0x40000000, SZ_8K),
410 DEFINE_RES_IRQ(IRQ_GPIO25),
411};
412#endif
413
414static struct gpiod_lookup_table assabet_cf_gpio_table = {
415 .dev_id = "sa11x0-pcmcia.1",
416 .table = {
417 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
418 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
419 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
420 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
421 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
422 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
423 { },
424 },
425};
426
427static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
428 REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
429};
430
431static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
432 .supply_name = "cf-power",
433 .microvolts = 3300000,
434};
435
436static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
437 .dev_id = "reg-fixed-voltage.0",
438 .table = {
439 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH),
440 { },
441 },
442};
443
444static struct gpiod_lookup_table assabet_leds_gpio_table = {
445 .dev_id = "leds-gpio",
446 .table = {
447 GPIO_LOOKUP("assabet", 13, NULL, GPIO_ACTIVE_LOW),
448 GPIO_LOOKUP("assabet", 14, NULL, GPIO_ACTIVE_LOW),
449 { },
450 },
451};
452
453static struct gpio_led assabet_leds[] __initdata = {
454 {
455 .name = "assabet:red",
456 .default_trigger = "cpu0",
457 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
458 }, {
459 .name = "assabet:green",
460 .default_trigger = "heartbeat",
461 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
462 },
463};
464
465static const struct gpio_led_platform_data assabet_leds_pdata __initconst = {
466 .num_leds = ARRAY_SIZE(assabet_leds),
467 .leds = assabet_leds,
468};
469
470static struct gpio_keys_button assabet_keys_buttons[] = {
471 {
472 .gpio = 0,
473 .irq = IRQ_GPIO0,
474 .desc = "gpio0",
475 .wakeup = 1,
476 .can_disable = 1,
477 .debounce_interval = 5,
478 }, {
479 .gpio = 1,
480 .irq = IRQ_GPIO1,
481 .desc = "gpio1",
482 .wakeup = 1,
483 .can_disable = 1,
484 .debounce_interval = 5,
485 },
486};
487
488static const struct gpio_keys_platform_data assabet_keys_pdata = {
489 .buttons = assabet_keys_buttons,
490 .nbuttons = ARRAY_SIZE(assabet_keys_buttons),
491 .rep = 0,
492};
493
494static struct gpiod_lookup_table assabet_uart1_gpio_table = {
495 .dev_id = "sa11x0-uart.1",
496 .table = {
497 GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW),
498 GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW),
499 GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW),
500 GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW),
501 GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW),
502 { },
503 },
504};
505
506static struct gpiod_lookup_table assabet_uart3_gpio_table = {
507 .dev_id = "sa11x0-uart.3",
508 .table = {
509 GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW),
510 GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW),
511 GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW),
512 GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW),
513 { },
514 },
515};
516
517static void __init assabet_init(void)
518{
519 /*
520 * Ensure that the power supply is in "high power" mode.
521 */
522 GPSR = GPIO_GPIO16;
523 GPDR |= GPIO_GPIO16;
524
525 /*
526 * Ensure that these pins are set as outputs and are driving
527 * logic 0. This ensures that we won't inadvertently toggle
528 * the WS latch in the CPLD, and we don't float causing
529 * excessive power drain. --rmk
530 */
531 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
532 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
533
534 /*
535 * Also set GPIO27 as an output; this is used to clock UART3
536 * via the FPGA and as otherwise has no pullups or pulldowns,
537 * so stop it floating.
538 */
539 GPCR = GPIO_GPIO27;
540 GPDR |= GPIO_GPIO27;
541
542 /*
543 * Set up registers for sleep mode.
544 */
545 PWER = PWER_GPIO0;
546 PGSR = 0;
547 PCFR = 0;
548 PSDR = 0;
549 PPDR |= PPC_TXD3 | PPC_TXD1;
550 PPSR |= PPC_TXD3 | PPC_TXD1;
551
552 sa11x0_ppc_configure_mcp();
553
554 if (machine_has_neponset()) {
555#ifndef CONFIG_ASSABET_NEPONSET
556 printk( "Warning: Neponset detected but full support "
557 "hasn't been configured in the kernel\n" );
558#else
559 platform_device_register_simple("neponset", 0,
560 neponset_resources, ARRAY_SIZE(neponset_resources));
561#endif
562 } else {
563 gpiod_add_lookup_table(&assabet_uart1_gpio_table);
564 gpiod_add_lookup_table(&assabet_uart3_gpio_table);
565 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);
566
567 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
568 assabet_cf_vcc_consumers,
569 ARRAY_SIZE(assabet_cf_vcc_consumers),
570 true);
571
572 }
573
574 platform_device_register_resndata(NULL, "gpio-keys", 0,
575 NULL, 0,
576 &assabet_keys_pdata,
577 sizeof(assabet_keys_pdata));
578
579 gpiod_add_lookup_table(&assabet_leds_gpio_table);
580 gpio_led_register_device(-1, &assabet_leds_pdata);
581
582#ifndef ASSABET_PAL_VIDEO
583 sa11x0_register_lcd(&lq039q2ds54_info);
584#else
585 sa11x0_register_lcd(&pal_video);
586#endif
587 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
588 ARRAY_SIZE(assabet_flash_resources));
589 sa11x0_register_mcp(&assabet_mcp_data);
590
591 if (!machine_has_neponset())
592 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
593}
594
595/*
596 * On Assabet, we must probe for the Neponset board _before_
597 * paging_init() has occurred to actually determine the amount
598 * of RAM available. To do so, we map the appropriate IO section
599 * in the page table here in order to access GPIO registers.
600 */
601static void __init map_sa1100_gpio_regs( void )
602{
603 unsigned long phys = __PREG(GPLR) & PMD_MASK;
604 unsigned long virt = (unsigned long)io_p2v(phys);
605 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
606 pmd_t *pmd;
607
608 pmd = pmd_off_k(virt);
609 *pmd = __pmd(phys | prot);
610 flush_pmd_entry(pmd);
611}
612
613/*
614 * Read System Configuration "Register"
615 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
616 * User's Guide", section 4.4.1)
617 *
618 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
619 * to set up the serial port for decompression status messages. We
620 * repeat it here because the kernel may not be loaded as a zImage, and
621 * also because it's a hassle to communicate the SCR value to the kernel
622 * from the decompressor.
623 *
624 * Note that IRQs are guaranteed to be disabled.
625 */
626static void __init get_assabet_scr(void)
627{
628 unsigned long scr, i;
629
630 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
631 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
632 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
633 for(i = 100; i--; ) /* Read GPIO 9:2 */
634 scr = GPLR;
635 GPDR |= 0x3fc; /* restore correct pin direction */
636 scr &= 0x3fc; /* save as system configuration byte. */
637 SCR_value = scr;
638}
639
640static void __init
641fixup_assabet(struct tag *tags, char **cmdline)
642{
643 /* This must be done before any call to machine_has_neponset() */
644 map_sa1100_gpio_regs();
645 get_assabet_scr();
646
647 if (machine_has_neponset())
648 printk("Neponset expansion board detected\n");
649}
650
651
652static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
653{
654 if (port->mapbase == _Ser1UTCR0) {
655 if (state)
656 ASSABET_BCR_clear(ASSABET_BCR_RS232EN);
657 else
658 ASSABET_BCR_set(ASSABET_BCR_RS232EN);
659 }
660}
661
662static struct sa1100_port_fns assabet_port_fns __initdata = {
663 .pm = assabet_uart_pm,
664};
665
666static struct map_desc assabet_io_desc[] __initdata = {
667 { /* Board Control Register */
668 .virtual = 0xf1000000,
669 .pfn = __phys_to_pfn(0x12000000),
670 .length = 0x00100000,
671 .type = MT_DEVICE
672 }, { /* MQ200 */
673 .virtual = 0xf2800000,
674 .pfn = __phys_to_pfn(0x4b800000),
675 .length = 0x00800000,
676 .type = MT_DEVICE
677 }
678};
679
680static void __init assabet_map_io(void)
681{
682 sa1100_map_io();
683 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
684
685 /*
686 * Set SUS bit in SDCR0 so serial port 1 functions.
687 * Its called GPCLKR0 in my SA1110 manual.
688 */
689 Ser1SDCR0 |= SDCR0_SUS;
690 MSC1 = (MSC1 & ~0xffff) |
691 MSC_NonBrst | MSC_32BitStMem |
692 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
693
694 if (!machine_has_neponset())
695 sa1100_register_uart_fns(&assabet_port_fns);
696
697 /*
698 * When Neponset is attached, the first UART should be
699 * UART3. That's what Angel is doing and many documents
700 * are stating this.
701 *
702 * We do the Neponset mapping even if Neponset support
703 * isn't compiled in so the user will still get something on
704 * the expected physical serial port.
705 *
706 * We no longer do this; not all boot loaders support it,
707 * and UART3 appears to be somewhat unreliable with blob.
708 */
709 sa1100_register_uart(0, 1);
710 sa1100_register_uart(2, 3);
711}
712
713static void __init assabet_init_irq(void)
714{
715 u32 def_val;
716
717 sa1100_init_irq();
718
719 if (machine_has_neponset())
720 def_val = ASSABET_BCR_DB1111;
721 else
722 def_val = ASSABET_BCR_DB1110;
723
724 /*
725 * Angel sets this, but other bootloaders may not.
726 *
727 * This must precede any driver calls to BCR_set() or BCR_clear().
728 */
729 assabet_init_gpio((void *)&ASSABET_BCR, def_val);
730}
731
732MACHINE_START(ASSABET, "Intel-Assabet")
733 .atag_offset = 0x100,
734 .fixup = fixup_assabet,
735 .map_io = assabet_map_io,
736 .nr_irqs = SA1100_NR_IRQS,
737 .init_irq = assabet_init_irq,
738 .init_time = sa1100_timer_init,
739 .init_machine = assabet_init,
740 .init_late = sa11x0_init_late,
741#ifdef CONFIG_SA1111
742 .dma_zone_size = SZ_1M,
743#endif
744 .restart = sa11x0_restart,
745MACHINE_END
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-sa1100/assabet.c
4 *
5 * Author: Nicolas Pitre
6 *
7 * This file contains all Assabet-specific tweaks.
8 */
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/errno.h>
13#include <linux/gpio/driver.h>
14#include <linux/gpio/gpio-reg.h>
15#include <linux/gpio/machine.h>
16#include <linux/gpio_keys.h>
17#include <linux/ioport.h>
18#include <linux/platform_data/sa11x0-serial.h>
19#include <linux/regulator/fixed.h>
20#include <linux/regulator/machine.h>
21#include <linux/serial_core.h>
22#include <linux/platform_device.h>
23#include <linux/mfd/ucb1x00.h>
24#include <linux/mtd/mtd.h>
25#include <linux/mtd/partitions.h>
26#include <linux/delay.h>
27#include <linux/mm.h>
28#include <linux/leds.h>
29#include <linux/slab.h>
30
31#include <video/sa1100fb.h>
32
33#include <mach/hardware.h>
34#include <asm/mach-types.h>
35#include <asm/setup.h>
36#include <asm/page.h>
37#include <asm/pgtable-hwdef.h>
38#include <asm/tlbflush.h>
39
40#include <asm/mach/arch.h>
41#include <asm/mach/flash.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>
46
47#include "generic.h"
48
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 | \
53 ASSABET_BCR_IRDA_MD0)
54
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)
61
62unsigned long SCR_value = ASSABET_SCR_INIT;
63EXPORT_SYMBOL(SCR_value);
64
65static struct gpio_chip *assabet_bcr_gc;
66
67static 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",
76};
77
78/* The old deprecated interface */
79void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
80{
81 unsigned long m = mask, v = val;
82
83 assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
84}
85EXPORT_SYMBOL(ASSABET_BCR_frob);
86
87static void __init assabet_init_gpio(void __iomem *reg, u32 def_val)
88{
89 struct gpio_chip *gc;
90
91 writel_relaxed(def_val, reg);
92
93 gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
94 assabet_names, NULL, NULL);
95
96 if (IS_ERR(gc))
97 return;
98
99 assabet_bcr_gc = gc;
100}
101
102/*
103 * The codec reset goes to three devices, so we need to release
104 * the rest when any one of these requests it. However, that
105 * causes the ADV7171 to consume around 100mA - more than half
106 * the LCD-blanked power.
107 *
108 * With the ADV7171, LCD and backlight enabled, we go over
109 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
110 * is connected, the Assabet crashes.
111 */
112#define RST_UCB1X00 (1 << 0)
113#define RST_UDA1341 (1 << 1)
114#define RST_ADV7171 (1 << 2)
115
116#define SDA GPIO_GPIO(15)
117#define SCK GPIO_GPIO(18)
118#define MOD GPIO_GPIO(17)
119
120static void adv7171_start(void)
121{
122 GPSR = SCK;
123 udelay(1);
124 GPSR = SDA;
125 udelay(2);
126 GPCR = SDA;
127}
128
129static void adv7171_stop(void)
130{
131 GPSR = SCK;
132 udelay(2);
133 GPSR = SDA;
134 udelay(1);
135}
136
137static void adv7171_send(unsigned byte)
138{
139 unsigned i;
140
141 for (i = 0; i < 8; i++, byte <<= 1) {
142 GPCR = SCK;
143 udelay(1);
144 if (byte & 0x80)
145 GPSR = SDA;
146 else
147 GPCR = SDA;
148 udelay(1);
149 GPSR = SCK;
150 udelay(1);
151 }
152 GPCR = SCK;
153 udelay(1);
154 GPSR = SDA;
155 udelay(1);
156 GPDR &= ~SDA;
157 GPSR = SCK;
158 udelay(1);
159 if (GPLR & SDA)
160 printk(KERN_WARNING "No ACK from ADV7171\n");
161 udelay(1);
162 GPCR = SCK | SDA;
163 udelay(1);
164 GPDR |= SDA;
165 udelay(1);
166}
167
168static void adv7171_write(unsigned reg, unsigned val)
169{
170 unsigned gpdr = GPDR;
171 unsigned gplr = GPLR;
172
173 ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
174 udelay(100);
175
176 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
177 GPDR = (GPDR | SCK | MOD) & ~SDA;
178 udelay(10);
179 if (!(GPLR & SDA))
180 printk(KERN_WARNING "Something dragging SDA down?\n");
181 GPDR |= SDA;
182
183 adv7171_start();
184 adv7171_send(0x54);
185 adv7171_send(reg);
186 adv7171_send(val);
187 adv7171_stop();
188
189 /* Restore GPIO state for L3 bus */
190 GPSR = gplr & (SDA | SCK | MOD);
191 GPCR = (~gplr) & (SDA | SCK | MOD);
192 GPDR = gpdr;
193}
194
195static void adv7171_sleep(void)
196{
197 /* Put the ADV7171 into sleep mode */
198 adv7171_write(0x04, 0x40);
199}
200
201static unsigned codec_nreset;
202
203static void assabet_codec_reset(unsigned mask, int set)
204{
205 unsigned long flags;
206 bool old;
207
208 local_irq_save(flags);
209 old = !codec_nreset;
210 if (set)
211 codec_nreset &= ~mask;
212 else
213 codec_nreset |= mask;
214
215 if (old != !codec_nreset) {
216 if (codec_nreset) {
217 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
218 adv7171_sleep();
219 } else {
220 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
221 }
222 }
223 local_irq_restore(flags);
224}
225
226static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
227{
228 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
229 state == UCB_RST_PROBE_FAIL;
230 assabet_codec_reset(RST_UCB1X00, set);
231}
232
233void assabet_uda1341_reset(int set)
234{
235 assabet_codec_reset(RST_UDA1341, set);
236}
237EXPORT_SYMBOL(assabet_uda1341_reset);
238
239
240/*
241 * Assabet flash support code.
242 */
243
244#ifdef ASSABET_REV_4
245/*
246 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
247 */
248static struct mtd_partition assabet_partitions[] = {
249 {
250 .name = "bootloader",
251 .size = 0x00020000,
252 .offset = 0,
253 .mask_flags = MTD_WRITEABLE,
254 }, {
255 .name = "bootloader params",
256 .size = 0x00020000,
257 .offset = MTDPART_OFS_APPEND,
258 .mask_flags = MTD_WRITEABLE,
259 }, {
260 .name = "jffs",
261 .size = MTDPART_SIZ_FULL,
262 .offset = MTDPART_OFS_APPEND,
263 }
264};
265#else
266/*
267 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
268 */
269static struct mtd_partition assabet_partitions[] = {
270 {
271 .name = "bootloader",
272 .size = 0x00040000,
273 .offset = 0,
274 .mask_flags = MTD_WRITEABLE,
275 }, {
276 .name = "bootloader params",
277 .size = 0x00040000,
278 .offset = MTDPART_OFS_APPEND,
279 .mask_flags = MTD_WRITEABLE,
280 }, {
281 .name = "jffs",
282 .size = MTDPART_SIZ_FULL,
283 .offset = MTDPART_OFS_APPEND,
284 }
285};
286#endif
287
288static struct flash_platform_data assabet_flash_data = {
289 .map_name = "cfi_probe",
290 .parts = assabet_partitions,
291 .nr_parts = ARRAY_SIZE(assabet_partitions),
292};
293
294static struct resource assabet_flash_resources[] = {
295 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
296 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
297};
298
299
300static struct ucb1x00_plat_data assabet_ucb1x00_data = {
301 .reset = assabet_ucb1x00_reset,
302 .gpio_base = -1,
303 .can_wakeup = 1,
304};
305
306static struct mcp_plat_data assabet_mcp_data = {
307 .mccr0 = MCCR0_ADM,
308 .sclk_rate = 11981000,
309 .codec_pdata = &assabet_ucb1x00_data,
310};
311
312static void assabet_lcd_set_visual(u32 visual)
313{
314 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
315
316 if (machine_is_assabet()) {
317#if 1 // phase 4 or newer Assabet's
318 if (is_true_color)
319 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
320 else
321 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
322#else
323 // older Assabet's
324 if (is_true_color)
325 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
326 else
327 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
328#endif
329 }
330}
331
332#ifndef ASSABET_PAL_VIDEO
333static void assabet_lcd_backlight_power(int on)
334{
335 if (on)
336 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
337 else
338 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
339}
340
341/*
342 * Turn on/off the backlight. When turning the backlight on, we wait
343 * 500us after turning it on so we don't cause the supplies to droop
344 * when we enable the LCD controller (and cause a hard reset.)
345 */
346static void assabet_lcd_power(int on)
347{
348 if (on) {
349 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
350 udelay(500);
351 } else
352 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
353}
354
355/*
356 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
357 * takes an RGB666 signal, but we provide it with an RGB565 signal
358 * instead (def_rgb_16).
359 */
360static struct sa1100fb_mach_info lq039q2ds54_info = {
361 .pixclock = 171521, .bpp = 16,
362 .xres = 320, .yres = 240,
363
364 .hsync_len = 5, .vsync_len = 1,
365 .left_margin = 61, .upper_margin = 3,
366 .right_margin = 9, .lower_margin = 0,
367
368 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
369
370 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
371 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
372
373 .backlight_power = assabet_lcd_backlight_power,
374 .lcd_power = assabet_lcd_power,
375 .set_visual = assabet_lcd_set_visual,
376};
377#else
378static void assabet_pal_backlight_power(int on)
379{
380 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
381}
382
383static void assabet_pal_power(int on)
384{
385 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
386}
387
388static struct sa1100fb_mach_info pal_info = {
389 .pixclock = 67797, .bpp = 16,
390 .xres = 640, .yres = 512,
391
392 .hsync_len = 64, .vsync_len = 6,
393 .left_margin = 125, .upper_margin = 70,
394 .right_margin = 115, .lower_margin = 36,
395
396 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
397 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
398
399 .backlight_power = assabet_pal_backlight_power,
400 .lcd_power = assabet_pal_power,
401 .set_visual = assabet_lcd_set_visual,
402};
403#endif
404
405#ifdef CONFIG_ASSABET_NEPONSET
406static struct resource neponset_resources[] = {
407 DEFINE_RES_MEM(0x10000000, 0x08000000),
408 DEFINE_RES_MEM(0x18000000, 0x04000000),
409 DEFINE_RES_MEM(0x40000000, SZ_8K),
410 DEFINE_RES_IRQ(IRQ_GPIO25),
411};
412#endif
413
414static struct gpiod_lookup_table assabet_cf_gpio_table = {
415 .dev_id = "sa11x0-pcmcia.1",
416 .table = {
417 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
418 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
419 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
420 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
421 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
422 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
423 { },
424 },
425};
426
427static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
428 REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
429};
430
431static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
432 .supply_name = "cf-power",
433 .microvolts = 3300000,
434};
435
436static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
437 .dev_id = "reg-fixed-voltage.0",
438 .table = {
439 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH),
440 { },
441 },
442};
443
444static struct gpiod_lookup_table assabet_leds_gpio_table = {
445 .dev_id = "leds-gpio",
446 .table = {
447 GPIO_LOOKUP("assabet", 13, NULL, GPIO_ACTIVE_LOW),
448 GPIO_LOOKUP("assabet", 14, NULL, GPIO_ACTIVE_LOW),
449 { },
450 },
451};
452
453static struct gpio_led assabet_leds[] __initdata = {
454 {
455 .name = "assabet:red",
456 .default_trigger = "cpu0",
457 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
458 }, {
459 .name = "assabet:green",
460 .default_trigger = "heartbeat",
461 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
462 },
463};
464
465static const struct gpio_led_platform_data assabet_leds_pdata __initconst = {
466 .num_leds = ARRAY_SIZE(assabet_leds),
467 .leds = assabet_leds,
468};
469
470static struct gpio_keys_button assabet_keys_buttons[] = {
471 {
472 .gpio = 0,
473 .irq = IRQ_GPIO0,
474 .desc = "gpio0",
475 .wakeup = 1,
476 .can_disable = 1,
477 .debounce_interval = 5,
478 }, {
479 .gpio = 1,
480 .irq = IRQ_GPIO1,
481 .desc = "gpio1",
482 .wakeup = 1,
483 .can_disable = 1,
484 .debounce_interval = 5,
485 },
486};
487
488static const struct gpio_keys_platform_data assabet_keys_pdata = {
489 .buttons = assabet_keys_buttons,
490 .nbuttons = ARRAY_SIZE(assabet_keys_buttons),
491 .rep = 0,
492};
493
494static struct gpiod_lookup_table assabet_uart1_gpio_table = {
495 .dev_id = "sa11x0-uart.1",
496 .table = {
497 GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW),
498 GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW),
499 GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW),
500 GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW),
501 GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW),
502 { },
503 },
504};
505
506static struct gpiod_lookup_table assabet_uart3_gpio_table = {
507 .dev_id = "sa11x0-uart.3",
508 .table = {
509 GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW),
510 GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW),
511 GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW),
512 GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW),
513 { },
514 },
515};
516
517static void __init assabet_init(void)
518{
519 /*
520 * Ensure that the power supply is in "high power" mode.
521 */
522 GPSR = GPIO_GPIO16;
523 GPDR |= GPIO_GPIO16;
524
525 /*
526 * Ensure that these pins are set as outputs and are driving
527 * logic 0. This ensures that we won't inadvertently toggle
528 * the WS latch in the CPLD, and we don't float causing
529 * excessive power drain. --rmk
530 */
531 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
532 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
533
534 /*
535 * Also set GPIO27 as an output; this is used to clock UART3
536 * via the FPGA and as otherwise has no pullups or pulldowns,
537 * so stop it floating.
538 */
539 GPCR = GPIO_GPIO27;
540 GPDR |= GPIO_GPIO27;
541
542 /*
543 * Set up registers for sleep mode.
544 */
545 PWER = PWER_GPIO0;
546 PGSR = 0;
547 PCFR = 0;
548 PSDR = 0;
549 PPDR |= PPC_TXD3 | PPC_TXD1;
550 PPSR |= PPC_TXD3 | PPC_TXD1;
551
552 sa11x0_ppc_configure_mcp();
553
554 if (machine_has_neponset()) {
555#ifndef CONFIG_ASSABET_NEPONSET
556 printk( "Warning: Neponset detected but full support "
557 "hasn't been configured in the kernel\n" );
558#else
559 platform_device_register_simple("neponset", 0,
560 neponset_resources, ARRAY_SIZE(neponset_resources));
561#endif
562 } else {
563 gpiod_add_lookup_table(&assabet_uart1_gpio_table);
564 gpiod_add_lookup_table(&assabet_uart3_gpio_table);
565 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);
566
567 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
568 assabet_cf_vcc_consumers,
569 ARRAY_SIZE(assabet_cf_vcc_consumers),
570 true);
571
572 }
573
574 platform_device_register_resndata(NULL, "gpio-keys", 0,
575 NULL, 0,
576 &assabet_keys_pdata,
577 sizeof(assabet_keys_pdata));
578
579 gpiod_add_lookup_table(&assabet_leds_gpio_table);
580 gpio_led_register_device(-1, &assabet_leds_pdata);
581
582#ifndef ASSABET_PAL_VIDEO
583 sa11x0_register_lcd(&lq039q2ds54_info);
584#else
585 sa11x0_register_lcd(&pal_video);
586#endif
587 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
588 ARRAY_SIZE(assabet_flash_resources));
589 sa11x0_register_mcp(&assabet_mcp_data);
590
591 if (!machine_has_neponset())
592 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
593}
594
595/*
596 * On Assabet, we must probe for the Neponset board _before_
597 * paging_init() has occurred to actually determine the amount
598 * of RAM available. To do so, we map the appropriate IO section
599 * in the page table here in order to access GPIO registers.
600 */
601static void __init map_sa1100_gpio_regs( void )
602{
603 unsigned long phys = __PREG(GPLR) & PMD_MASK;
604 unsigned long virt = (unsigned long)io_p2v(phys);
605 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
606 pmd_t *pmd;
607
608 pmd = pmd_off_k(virt);
609 *pmd = __pmd(phys | prot);
610 flush_pmd_entry(pmd);
611}
612
613/*
614 * Read System Configuration "Register"
615 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
616 * User's Guide", section 4.4.1)
617 *
618 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
619 * to set up the serial port for decompression status messages. We
620 * repeat it here because the kernel may not be loaded as a zImage, and
621 * also because it's a hassle to communicate the SCR value to the kernel
622 * from the decompressor.
623 *
624 * Note that IRQs are guaranteed to be disabled.
625 */
626static void __init get_assabet_scr(void)
627{
628 unsigned long scr, i;
629
630 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
631 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
632 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
633 for(i = 100; i--; ) /* Read GPIO 9:2 */
634 scr = GPLR;
635 GPDR |= 0x3fc; /* restore correct pin direction */
636 scr &= 0x3fc; /* save as system configuration byte. */
637 SCR_value = scr;
638}
639
640static void __init
641fixup_assabet(struct tag *tags, char **cmdline)
642{
643 /* This must be done before any call to machine_has_neponset() */
644 map_sa1100_gpio_regs();
645 get_assabet_scr();
646
647 if (machine_has_neponset())
648 printk("Neponset expansion board detected\n");
649}
650
651
652static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
653{
654 if (port->mapbase == _Ser1UTCR0) {
655 if (state)
656 ASSABET_BCR_clear(ASSABET_BCR_RS232EN);
657 else
658 ASSABET_BCR_set(ASSABET_BCR_RS232EN);
659 }
660}
661
662static struct sa1100_port_fns assabet_port_fns __initdata = {
663 .pm = assabet_uart_pm,
664};
665
666static struct map_desc assabet_io_desc[] __initdata = {
667 { /* Board Control Register */
668 .virtual = 0xf1000000,
669 .pfn = __phys_to_pfn(0x12000000),
670 .length = 0x00100000,
671 .type = MT_DEVICE
672 }, { /* MQ200 */
673 .virtual = 0xf2800000,
674 .pfn = __phys_to_pfn(0x4b800000),
675 .length = 0x00800000,
676 .type = MT_DEVICE
677 }
678};
679
680static void __init assabet_map_io(void)
681{
682 sa1100_map_io();
683 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
684
685 /*
686 * Set SUS bit in SDCR0 so serial port 1 functions.
687 * Its called GPCLKR0 in my SA1110 manual.
688 */
689 Ser1SDCR0 |= SDCR0_SUS;
690 MSC1 = (MSC1 & ~0xffff) |
691 MSC_NonBrst | MSC_32BitStMem |
692 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
693
694 if (!machine_has_neponset())
695 sa1100_register_uart_fns(&assabet_port_fns);
696
697 /*
698 * When Neponset is attached, the first UART should be
699 * UART3. That's what Angel is doing and many documents
700 * are stating this.
701 *
702 * We do the Neponset mapping even if Neponset support
703 * isn't compiled in so the user will still get something on
704 * the expected physical serial port.
705 *
706 * We no longer do this; not all boot loaders support it,
707 * and UART3 appears to be somewhat unreliable with blob.
708 */
709 sa1100_register_uart(0, 1);
710 sa1100_register_uart(2, 3);
711}
712
713static void __init assabet_init_irq(void)
714{
715 u32 def_val;
716
717 sa1100_init_irq();
718
719 if (machine_has_neponset())
720 def_val = ASSABET_BCR_DB1111;
721 else
722 def_val = ASSABET_BCR_DB1110;
723
724 /*
725 * Angel sets this, but other bootloaders may not.
726 *
727 * This must precede any driver calls to BCR_set() or BCR_clear().
728 */
729 assabet_init_gpio((void *)&ASSABET_BCR, def_val);
730}
731
732MACHINE_START(ASSABET, "Intel-Assabet")
733 .atag_offset = 0x100,
734 .fixup = fixup_assabet,
735 .map_io = assabet_map_io,
736 .nr_irqs = SA1100_NR_IRQS,
737 .init_irq = assabet_init_irq,
738 .init_time = sa1100_timer_init,
739 .init_machine = assabet_init,
740 .init_late = sa11x0_init_late,
741#ifdef CONFIG_SA1111
742 .dma_zone_size = SZ_1M,
743#endif
744 .restart = sa11x0_restart,
745MACHINE_END