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/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>
26#include <linux/mm.h>
27#include <linux/leds.h>
28#include <linux/slab.h>
29
30#include <video/sa1100fb.h>
31
32#include <mach/hardware.h>
33#include <asm/mach-types.h>
34#include <asm/setup.h>
35#include <asm/page.h>
36#include <asm/pgtable-hwdef.h>
37#include <asm/tlbflush.h>
38
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>
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
300/*
301 * Assabet IrDA support code.
302 */
303
304static int assabet_irda_set_power(struct device *dev, unsigned int state)
305{
306 static unsigned int bcr_state[4] = {
307 ASSABET_BCR_IRDA_MD0,
308 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
309 ASSABET_BCR_IRDA_MD1,
310 0
311 };
312
313 if (state < 4)
314 ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0,
315 bcr_state[state]);
316 return 0;
317}
318
319static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
320{
321 if (speed < 4000000)
322 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
323 else
324 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
325}
326
327static struct irda_platform_data assabet_irda_data = {
328 .set_power = assabet_irda_set_power,
329 .set_speed = assabet_irda_set_speed,
330};
331
332static struct ucb1x00_plat_data assabet_ucb1x00_data = {
333 .reset = assabet_ucb1x00_reset,
334 .gpio_base = -1,
335 .can_wakeup = 1,
336};
337
338static struct mcp_plat_data assabet_mcp_data = {
339 .mccr0 = MCCR0_ADM,
340 .sclk_rate = 11981000,
341 .codec_pdata = &assabet_ucb1x00_data,
342};
343
344static void assabet_lcd_set_visual(u32 visual)
345{
346 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
347
348 if (machine_is_assabet()) {
349#if 1 // phase 4 or newer Assabet's
350 if (is_true_color)
351 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
352 else
353 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
354#else
355 // older Assabet's
356 if (is_true_color)
357 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
358 else
359 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
360#endif
361 }
362}
363
364#ifndef ASSABET_PAL_VIDEO
365static void assabet_lcd_backlight_power(int on)
366{
367 if (on)
368 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
369 else
370 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
371}
372
373/*
374 * Turn on/off the backlight. When turning the backlight on, we wait
375 * 500us after turning it on so we don't cause the supplies to droop
376 * when we enable the LCD controller (and cause a hard reset.)
377 */
378static void assabet_lcd_power(int on)
379{
380 if (on) {
381 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
382 udelay(500);
383 } else
384 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
385}
386
387/*
388 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
389 * takes an RGB666 signal, but we provide it with an RGB565 signal
390 * instead (def_rgb_16).
391 */
392static struct sa1100fb_mach_info lq039q2ds54_info = {
393 .pixclock = 171521, .bpp = 16,
394 .xres = 320, .yres = 240,
395
396 .hsync_len = 5, .vsync_len = 1,
397 .left_margin = 61, .upper_margin = 3,
398 .right_margin = 9, .lower_margin = 0,
399
400 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
401
402 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
403 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
404
405 .backlight_power = assabet_lcd_backlight_power,
406 .lcd_power = assabet_lcd_power,
407 .set_visual = assabet_lcd_set_visual,
408};
409#else
410static void assabet_pal_backlight_power(int on)
411{
412 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
413}
414
415static void assabet_pal_power(int on)
416{
417 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
418}
419
420static struct sa1100fb_mach_info pal_info = {
421 .pixclock = 67797, .bpp = 16,
422 .xres = 640, .yres = 512,
423
424 .hsync_len = 64, .vsync_len = 6,
425 .left_margin = 125, .upper_margin = 70,
426 .right_margin = 115, .lower_margin = 36,
427
428 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
429 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
430
431 .backlight_power = assabet_pal_backlight_power,
432 .lcd_power = assabet_pal_power,
433 .set_visual = assabet_lcd_set_visual,
434};
435#endif
436
437#ifdef CONFIG_ASSABET_NEPONSET
438static struct resource neponset_resources[] = {
439 DEFINE_RES_MEM(0x10000000, 0x08000000),
440 DEFINE_RES_MEM(0x18000000, 0x04000000),
441 DEFINE_RES_MEM(0x40000000, SZ_8K),
442 DEFINE_RES_IRQ(IRQ_GPIO25),
443};
444#endif
445
446static struct gpiod_lookup_table assabet_cf_gpio_table = {
447 .dev_id = "sa11x0-pcmcia.1",
448 .table = {
449 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
450 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
451 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
452 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
453 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
454 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
455 { },
456 },
457};
458
459static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
460 REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
461};
462
463static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
464 .supply_name = "cf-power",
465 .microvolts = 3300000,
466};
467
468static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
469 .dev_id = "reg-fixed-voltage.0",
470 .table = {
471 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH),
472 { },
473 },
474};
475
476static struct gpiod_lookup_table assabet_leds_gpio_table = {
477 .dev_id = "leds-gpio",
478 .table = {
479 GPIO_LOOKUP("assabet", 13, NULL, GPIO_ACTIVE_LOW),
480 GPIO_LOOKUP("assabet", 14, NULL, GPIO_ACTIVE_LOW),
481 { },
482 },
483};
484
485static struct gpio_led assabet_leds[] __initdata = {
486 {
487 .name = "assabet:red",
488 .default_trigger = "cpu0",
489 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
490 }, {
491 .name = "assabet:green",
492 .default_trigger = "heartbeat",
493 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
494 },
495};
496
497static const struct gpio_led_platform_data assabet_leds_pdata __initconst = {
498 .num_leds = ARRAY_SIZE(assabet_leds),
499 .leds = assabet_leds,
500};
501
502static struct gpio_keys_button assabet_keys_buttons[] = {
503 {
504 .gpio = 0,
505 .irq = IRQ_GPIO0,
506 .desc = "gpio0",
507 .wakeup = 1,
508 .can_disable = 1,
509 .debounce_interval = 5,
510 }, {
511 .gpio = 1,
512 .irq = IRQ_GPIO1,
513 .desc = "gpio1",
514 .wakeup = 1,
515 .can_disable = 1,
516 .debounce_interval = 5,
517 },
518};
519
520static const struct gpio_keys_platform_data assabet_keys_pdata = {
521 .buttons = assabet_keys_buttons,
522 .nbuttons = ARRAY_SIZE(assabet_keys_buttons),
523 .rep = 0,
524};
525
526static struct gpiod_lookup_table assabet_uart1_gpio_table = {
527 .dev_id = "sa11x0-uart.1",
528 .table = {
529 GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW),
530 GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW),
531 GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW),
532 GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW),
533 GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW),
534 { },
535 },
536};
537
538static struct gpiod_lookup_table assabet_uart3_gpio_table = {
539 .dev_id = "sa11x0-uart.3",
540 .table = {
541 GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW),
542 GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW),
543 GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW),
544 GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW),
545 { },
546 },
547};
548
549static void __init assabet_init(void)
550{
551 /*
552 * Ensure that the power supply is in "high power" mode.
553 */
554 GPSR = GPIO_GPIO16;
555 GPDR |= GPIO_GPIO16;
556
557 /*
558 * Ensure that these pins are set as outputs and are driving
559 * logic 0. This ensures that we won't inadvertently toggle
560 * the WS latch in the CPLD, and we don't float causing
561 * excessive power drain. --rmk
562 */
563 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
564 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
565
566 /*
567 * Also set GPIO27 as an output; this is used to clock UART3
568 * via the FPGA and as otherwise has no pullups or pulldowns,
569 * so stop it floating.
570 */
571 GPCR = GPIO_GPIO27;
572 GPDR |= GPIO_GPIO27;
573
574 /*
575 * Set up registers for sleep mode.
576 */
577 PWER = PWER_GPIO0;
578 PGSR = 0;
579 PCFR = 0;
580 PSDR = 0;
581 PPDR |= PPC_TXD3 | PPC_TXD1;
582 PPSR |= PPC_TXD3 | PPC_TXD1;
583
584 sa11x0_ppc_configure_mcp();
585
586 if (machine_has_neponset()) {
587#ifndef CONFIG_ASSABET_NEPONSET
588 printk( "Warning: Neponset detected but full support "
589 "hasn't been configured in the kernel\n" );
590#else
591 platform_device_register_simple("neponset", 0,
592 neponset_resources, ARRAY_SIZE(neponset_resources));
593#endif
594 } else {
595 gpiod_add_lookup_table(&assabet_uart1_gpio_table);
596 gpiod_add_lookup_table(&assabet_uart3_gpio_table);
597 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);
598
599 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
600 assabet_cf_vcc_consumers,
601 ARRAY_SIZE(assabet_cf_vcc_consumers),
602 true);
603
604 }
605
606 platform_device_register_resndata(NULL, "gpio-keys", 0,
607 NULL, 0,
608 &assabet_keys_pdata,
609 sizeof(assabet_keys_pdata));
610
611 gpiod_add_lookup_table(&assabet_leds_gpio_table);
612 gpio_led_register_device(-1, &assabet_leds_pdata);
613
614#ifndef ASSABET_PAL_VIDEO
615 sa11x0_register_lcd(&lq039q2ds54_info);
616#else
617 sa11x0_register_lcd(&pal_video);
618#endif
619 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
620 ARRAY_SIZE(assabet_flash_resources));
621 sa11x0_register_irda(&assabet_irda_data);
622 sa11x0_register_mcp(&assabet_mcp_data);
623
624 if (!machine_has_neponset())
625 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
626}
627
628/*
629 * On Assabet, we must probe for the Neponset board _before_
630 * paging_init() has occurred to actually determine the amount
631 * of RAM available. To do so, we map the appropriate IO section
632 * in the page table here in order to access GPIO registers.
633 */
634static void __init map_sa1100_gpio_regs( void )
635{
636 unsigned long phys = __PREG(GPLR) & PMD_MASK;
637 unsigned long virt = (unsigned long)io_p2v(phys);
638 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
639 pmd_t *pmd;
640
641 pmd = pmd_off_k(virt);
642 *pmd = __pmd(phys | prot);
643 flush_pmd_entry(pmd);
644}
645
646/*
647 * Read System Configuration "Register"
648 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
649 * User's Guide", section 4.4.1)
650 *
651 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
652 * to set up the serial port for decompression status messages. We
653 * repeat it here because the kernel may not be loaded as a zImage, and
654 * also because it's a hassle to communicate the SCR value to the kernel
655 * from the decompressor.
656 *
657 * Note that IRQs are guaranteed to be disabled.
658 */
659static void __init get_assabet_scr(void)
660{
661 unsigned long scr, i;
662
663 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */
664 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
665 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
666 for(i = 100; i--; ) /* Read GPIO 9:2 */
667 scr = GPLR;
668 GPDR |= 0x3fc; /* restore correct pin direction */
669 scr &= 0x3fc; /* save as system configuration byte. */
670 SCR_value = scr;
671}
672
673static void __init
674fixup_assabet(struct tag *tags, char **cmdline)
675{
676 /* This must be done before any call to machine_has_neponset() */
677 map_sa1100_gpio_regs();
678 get_assabet_scr();
679
680 if (machine_has_neponset())
681 printk("Neponset expansion board detected\n");
682}
683
684
685static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
686{
687 if (port->mapbase == _Ser1UTCR0) {
688 if (state)
689 ASSABET_BCR_clear(ASSABET_BCR_RS232EN);
690 else
691 ASSABET_BCR_set(ASSABET_BCR_RS232EN);
692 }
693}
694
695static struct sa1100_port_fns assabet_port_fns __initdata = {
696 .pm = assabet_uart_pm,
697};
698
699static struct map_desc assabet_io_desc[] __initdata = {
700 { /* Board Control Register */
701 .virtual = 0xf1000000,
702 .pfn = __phys_to_pfn(0x12000000),
703 .length = 0x00100000,
704 .type = MT_DEVICE
705 }, { /* MQ200 */
706 .virtual = 0xf2800000,
707 .pfn = __phys_to_pfn(0x4b800000),
708 .length = 0x00800000,
709 .type = MT_DEVICE
710 }
711};
712
713static void __init assabet_map_io(void)
714{
715 sa1100_map_io();
716 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
717
718 /*
719 * Set SUS bit in SDCR0 so serial port 1 functions.
720 * Its called GPCLKR0 in my SA1110 manual.
721 */
722 Ser1SDCR0 |= SDCR0_SUS;
723 MSC1 = (MSC1 & ~0xffff) |
724 MSC_NonBrst | MSC_32BitStMem |
725 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
726
727 if (!machine_has_neponset())
728 sa1100_register_uart_fns(&assabet_port_fns);
729
730 /*
731 * When Neponset is attached, the first UART should be
732 * UART3. That's what Angel is doing and many documents
733 * are stating this.
734 *
735 * We do the Neponset mapping even if Neponset support
736 * isn't compiled in so the user will still get something on
737 * the expected physical serial port.
738 *
739 * We no longer do this; not all boot loaders support it,
740 * and UART3 appears to be somewhat unreliable with blob.
741 */
742 sa1100_register_uart(0, 1);
743 sa1100_register_uart(2, 3);
744}
745
746void __init assabet_init_irq(void)
747{
748 u32 def_val;
749
750 sa1100_init_irq();
751
752 if (machine_has_neponset())
753 def_val = ASSABET_BCR_DB1111;
754 else
755 def_val = ASSABET_BCR_DB1110;
756
757 /*
758 * Angel sets this, but other bootloaders may not.
759 *
760 * This must precede any driver calls to BCR_set() or BCR_clear().
761 */
762 assabet_init_gpio((void *)&ASSABET_BCR, def_val);
763}
764
765MACHINE_START(ASSABET, "Intel-Assabet")
766 .atag_offset = 0x100,
767 .fixup = fixup_assabet,
768 .map_io = assabet_map_io,
769 .nr_irqs = SA1100_NR_IRQS,
770 .init_irq = assabet_init_irq,
771 .init_time = sa1100_timer_init,
772 .init_machine = assabet_init,
773 .init_late = sa11x0_init_late,
774#ifdef CONFIG_SA1111
775 .dma_zone_size = SZ_1M,
776#endif
777 .restart = sa11x0_restart,
778MACHINE_END
779

source code of linux/arch/arm/mach-sa1100/assabet.c