1/*
2 *  linux/arch/arm/mach-pxa/lubbock.c
3 *
4 *  Support for the Intel DBPXA250 Development Platform.
5 *
6 *  Author:	Nicolas Pitre
7 *  Created:	Jun 15, 2001
8 *  Copyright:	MontaVista Software Inc.
9 *
10 *  This program is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 2 as
12 *  published by the Free Software Foundation.
13 */
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/platform_device.h>
18#include <linux/sysdev.h>
19#include <linux/major.h>
20#include <linux/fb.h>
21#include <linux/interrupt.h>
22#include <linux/mtd/mtd.h>
23#include <linux/mtd/partitions.h>
24
25#include <linux/spi/spi.h>
26#include <linux/spi/ads7846.h>
27#include <asm/arch/pxa2xx_spi.h>
28
29#include <asm/setup.h>
30#include <asm/memory.h>
31#include <asm/mach-types.h>
32#include <asm/hardware.h>
33#include <asm/irq.h>
34#include <asm/sizes.h>
35
36#include <asm/mach/arch.h>
37#include <asm/mach/map.h>
38#include <asm/mach/irq.h>
39#include <asm/mach/flash.h>
40
41#include <asm/hardware/sa1111.h>
42
43#include <asm/arch/pxa-regs.h>
44#include <asm/arch/lubbock.h>
45#include <asm/arch/udc.h>
46#include <asm/arch/irda.h>
47#include <asm/arch/pxafb.h>
48#include <asm/arch/mmc.h>
49
50#include "generic.h"
51
52
53#define LUB_MISC_WR		__LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
54
55void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
56{
57	unsigned long flags;
58
59	local_irq_save(flags);
60	LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
61	local_irq_restore(flags);
62}
63EXPORT_SYMBOL(lubbock_set_misc_wr);
64
65static unsigned long lubbock_irq_enabled;
66
67static void lubbock_mask_irq(unsigned int irq)
68{
69	int lubbock_irq = (irq - LUBBOCK_IRQ(0));
70	LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
71}
72
73static void lubbock_unmask_irq(unsigned int irq)
74{
75	int lubbock_irq = (irq - LUBBOCK_IRQ(0));
76	/* the irq can be acknowledged only if deasserted, so it's done here */
77	LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
78	LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
79}
80
81static struct irq_chip lubbock_irq_chip = {
82	.name		= "FPGA",
83	.ack		= lubbock_mask_irq,
84	.mask		= lubbock_mask_irq,
85	.unmask		= lubbock_unmask_irq,
86};
87
88static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
89{
90	unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
91	do {
92		GEDR(0) = GPIO_bit(0);	/* clear our parent irq */
93		if (likely(pending)) {
94			irq = LUBBOCK_IRQ(0) + __ffs(pending);
95			desc = irq_desc + irq;
96			desc_handle_irq(irq, desc);
97		}
98		pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
99	} while (pending);
100}
101
102static void __init lubbock_init_irq(void)
103{
104	int irq;
105
106	pxa_init_irq();
107
108	/* setup extra lubbock irqs */
109	for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
110		set_irq_chip(irq, &lubbock_irq_chip);
111		set_irq_handler(irq, handle_level_irq);
112		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
113	}
114
115	set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
116	set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
117}
118
119#ifdef CONFIG_PM
120
121static int lubbock_irq_resume(struct sys_device *dev)
122{
123	LUB_IRQ_MASK_EN = lubbock_irq_enabled;
124	return 0;
125}
126
127static struct sysdev_class lubbock_irq_sysclass = {
128	set_kset_name("cpld_irq"),
129	.resume = lubbock_irq_resume,
130};
131
132static struct sys_device lubbock_irq_device = {
133	.cls = &lubbock_irq_sysclass,
134};
135
136static int __init lubbock_irq_device_init(void)
137{
138	int ret = sysdev_class_register(&lubbock_irq_sysclass);
139	if (ret == 0)
140		ret = sysdev_register(&lubbock_irq_device);
141	return ret;
142}
143
144device_initcall(lubbock_irq_device_init);
145
146#endif
147
148static int lubbock_udc_is_connected(void)
149{
150	return (LUB_MISC_RD & (1 << 9)) == 0;
151}
152
153static struct pxa2xx_udc_mach_info udc_info __initdata = {
154	.udc_is_connected	= lubbock_udc_is_connected,
155	// no D+ pullup; lubbock can't connect/disconnect in software
156};
157
158static struct platform_device lub_audio_device = {
159	.name		= "pxa2xx-ac97",
160	.id		= -1,
161};
162
163static struct resource sa1111_resources[] = {
164	[0] = {
165		.start	= 0x10000000,
166		.end	= 0x10001fff,
167		.flags	= IORESOURCE_MEM,
168	},
169	[1] = {
170		.start	= LUBBOCK_SA1111_IRQ,
171		.end	= LUBBOCK_SA1111_IRQ,
172		.flags	= IORESOURCE_IRQ,
173	},
174};
175
176static struct platform_device sa1111_device = {
177	.name		= "sa1111",
178	.id		= -1,
179	.num_resources	= ARRAY_SIZE(sa1111_resources),
180	.resource	= sa1111_resources,
181};
182
183static struct resource smc91x_resources[] = {
184	[0] = {
185		.name	= "smc91x-regs",
186		.start	= 0x0c000c00,
187		.end	= 0x0c0fffff,
188		.flags	= IORESOURCE_MEM,
189	},
190	[1] = {
191		.start	= LUBBOCK_ETH_IRQ,
192		.end	= LUBBOCK_ETH_IRQ,
193		.flags	= IORESOURCE_IRQ,
194	},
195	[2] = {
196		.name	= "smc91x-attrib",
197		.start	= 0x0e000000,
198		.end	= 0x0e0fffff,
199		.flags	= IORESOURCE_MEM,
200	},
201};
202
203/* ADS7846 is connected through SSP ... and if your board has J5 populated,
204 * you can select it to replace the ucb1400 by switching the touchscreen cable
205 * (to J5) and poking board registers (as done below).  Else it's only useful
206 * for the temperature sensors.
207 */
208static struct resource pxa_ssp_resources[] = {
209	[0] = {
210		.start	= __PREG(SSCR0_P(1)),
211		.end	= __PREG(SSCR0_P(1)) + 0x14,
212		.flags	= IORESOURCE_MEM,
213	},
214	[1] = {
215		.start	= IRQ_SSP,
216		.end	= IRQ_SSP,
217		.flags	= IORESOURCE_IRQ,
218	},
219};
220
221static struct pxa2xx_spi_master pxa_ssp_master_info = {
222	.ssp_type	= PXA25x_SSP,
223	.clock_enable	= CKEN_SSP,
224	.num_chipselect	= 0,
225};
226
227static struct platform_device pxa_ssp = {
228	.name		= "pxa2xx-spi",
229	.id		= 1,
230	.resource	= pxa_ssp_resources,
231	.num_resources	= ARRAY_SIZE(pxa_ssp_resources),
232	.dev = {
233		.platform_data	= &pxa_ssp_master_info,
234	},
235};
236
237static int lubbock_ads7846_pendown_state(void)
238{
239	/* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
240	return 0;
241}
242
243static struct ads7846_platform_data ads_info = {
244	.model			= 7846,
245	.vref_delay_usecs	= 100,		/* internal, no cap */
246	.get_pendown_state	= lubbock_ads7846_pendown_state,
247	// .x_plate_ohms		= 500,	/* GUESS! */
248	// .y_plate_ohms		= 500,	/* GUESS! */
249};
250
251static void ads7846_cs(u32 command)
252{
253	static const unsigned	TS_nCS = 1 << 11;
254	lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
255}
256
257static struct pxa2xx_spi_chip ads_hw = {
258	.tx_threshold		= 1,
259	.rx_threshold		= 2,
260	.cs_control		= ads7846_cs,
261};
262
263static struct spi_board_info spi_board_info[] __initdata = { {
264	.modalias	= "ads7846",
265	.platform_data	= &ads_info,
266	.controller_data = &ads_hw,
267	.irq		= LUBBOCK_BB_IRQ,
268	.max_speed_hz	= 120000 /* max sample rate at 3V */
269				* 26 /* command + data + overhead */,
270	.bus_num	= 1,
271	.chip_select	= 0,
272},
273};
274
275static struct platform_device smc91x_device = {
276	.name		= "smc91x",
277	.id		= -1,
278	.num_resources	= ARRAY_SIZE(smc91x_resources),
279	.resource	= smc91x_resources,
280};
281
282static struct resource flash_resources[] = {
283	[0] = {
284		.start	= 0x00000000,
285		.end	= SZ_64M - 1,
286		.flags	= IORESOURCE_MEM,
287	},
288	[1] = {
289		.start	= 0x04000000,
290		.end	= 0x04000000 + SZ_64M - 1,
291		.flags	= IORESOURCE_MEM,
292	},
293};
294
295static struct mtd_partition lubbock_partitions[] = {
296	{
297		.name =		"Bootloader",
298		.size =		0x00040000,
299		.offset =	0,
300		.mask_flags =	MTD_WRITEABLE  /* force read-only */
301	},{
302		.name =		"Kernel",
303		.size =		0x00100000,
304		.offset =	0x00040000,
305	},{
306		.name =		"Filesystem",
307		.size =		MTDPART_SIZ_FULL,
308		.offset =	0x00140000
309	}
310};
311
312static struct flash_platform_data lubbock_flash_data[2] = {
313	{
314		.map_name	= "cfi_probe",
315		.parts		= lubbock_partitions,
316		.nr_parts	= ARRAY_SIZE(lubbock_partitions),
317	}, {
318		.map_name	= "cfi_probe",
319		.parts		= NULL,
320		.nr_parts	= 0,
321	}
322};
323
324static struct platform_device lubbock_flash_device[2] = {
325	{
326		.name		= "pxa2xx-flash",
327		.id		= 0,
328		.dev = {
329			.platform_data = &lubbock_flash_data[0],
330		},
331		.resource = &flash_resources[0],
332		.num_resources = 1,
333	},
334	{
335		.name		= "pxa2xx-flash",
336		.id		= 1,
337		.dev = {
338			.platform_data = &lubbock_flash_data[1],
339		},
340		.resource = &flash_resources[1],
341		.num_resources = 1,
342	},
343};
344
345static struct platform_device *devices[] __initdata = {
346	&sa1111_device,
347	&lub_audio_device,
348	&smc91x_device,
349	&lubbock_flash_device[0],
350	&lubbock_flash_device[1],
351	&pxa_ssp,
352};
353
354static struct pxafb_mode_info sharp_lm8v31_mode = {
355	.pixclock	= 270000,
356	.xres		= 640,
357	.yres		= 480,
358	.bpp		= 16,
359	.hsync_len	= 1,
360	.left_margin	= 3,
361	.right_margin	= 3,
362	.vsync_len	= 1,
363	.upper_margin	= 0,
364	.lower_margin	= 0,
365	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
366	.cmap_greyscale	= 0,
367};
368
369static struct pxafb_mach_info sharp_lm8v31 = {
370	.modes		= &sharp_lm8v31_mode,
371	.num_modes	= 1,
372	.cmap_inverse	= 0,
373	.cmap_static	= 0,
374	.lccr0		= LCCR0_SDS,
375	.lccr3		= LCCR3_PCP | LCCR3_Acb(255),
376};
377
378#define	MMC_POLL_RATE		msecs_to_jiffies(1000)
379
380static void lubbock_mmc_poll(unsigned long);
381static irq_handler_t mmc_detect_int;
382
383static struct timer_list mmc_timer = {
384	.function	= lubbock_mmc_poll,
385};
386
387static void lubbock_mmc_poll(unsigned long data)
388{
389	unsigned long flags;
390
391	/* clear any previous irq state, then ... */
392	local_irq_save(flags);
393	LUB_IRQ_SET_CLR &= ~(1 << 0);
394	local_irq_restore(flags);
395
396	/* poll until mmc/sd card is removed */
397	if (LUB_IRQ_SET_CLR & (1 << 0))
398		mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
399	else {
400		(void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
401		enable_irq(LUBBOCK_SD_IRQ);
402	}
403}
404
405static irqreturn_t lubbock_detect_int(int irq, void *data)
406{
407	/* IRQ is level triggered; disable, and poll for removal */
408	disable_irq(irq);
409	mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
410
411	return mmc_detect_int(irq, data);
412}
413
414static int lubbock_mci_init(struct device *dev,
415		irq_handler_t detect_int,
416		void *data)
417{
418	/* setup GPIO for PXA25x MMC controller	*/
419	pxa_gpio_mode(GPIO6_MMCCLK_MD);
420	pxa_gpio_mode(GPIO8_MMCCS0_MD);
421
422	/* detect card insert/eject */
423	mmc_detect_int = detect_int;
424	init_timer(&mmc_timer);
425	mmc_timer.data = (unsigned long) data;
426	return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
427			IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
428}
429
430static int lubbock_mci_get_ro(struct device *dev)
431{
432	return (LUB_MISC_RD & (1 << 2)) != 0;
433}
434
435static void lubbock_mci_exit(struct device *dev, void *data)
436{
437	free_irq(LUBBOCK_SD_IRQ, data);
438	del_timer_sync(&mmc_timer);
439}
440
441static struct pxamci_platform_data lubbock_mci_platform_data = {
442	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
443	.detect_delay	= 1,
444	.init 		= lubbock_mci_init,
445	.get_ro		= lubbock_mci_get_ro,
446	.exit 		= lubbock_mci_exit,
447};
448
449static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
450{
451	unsigned long flags;
452
453	local_irq_save(flags);
454	if (mode & IR_SIRMODE) {
455		LUB_MISC_WR &= ~(1 << 4);
456	} else if (mode & IR_FIRMODE) {
457		LUB_MISC_WR |= 1 << 4;
458	}
459	local_irq_restore(flags);
460}
461
462static struct pxaficp_platform_data lubbock_ficp_platform_data = {
463	.transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
464	.transceiver_mode = lubbock_irda_transceiver_mode,
465};
466
467static void __init lubbock_init(void)
468{
469	int flashboot = (LUB_CONF_SWITCHES & 1);
470
471	pxa_set_udc_info(&udc_info);
472	set_pxa_fb_info(&sharp_lm8v31);
473	pxa_set_mci_info(&lubbock_mci_platform_data);
474	pxa_set_ficp_info(&lubbock_ficp_platform_data);
475
476	lubbock_flash_data[0].width = lubbock_flash_data[1].width =
477		(BOOT_DEF & 1) ? 2 : 4;
478	/* Compensate for the nROMBT switch which swaps the flash banks */
479	printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
480	       flashboot?"Flash":"ROM", flashboot);
481
482	lubbock_flash_data[flashboot^1].name = "application-flash";
483	lubbock_flash_data[flashboot].name = "boot-rom";
484	(void) platform_add_devices(devices, ARRAY_SIZE(devices));
485
486	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
487}
488
489static struct map_desc lubbock_io_desc[] __initdata = {
490  	{	/* CPLD */
491		.virtual	=  LUBBOCK_FPGA_VIRT,
492		.pfn		= __phys_to_pfn(LUBBOCK_FPGA_PHYS),
493		.length		= 0x00100000,
494		.type		= MT_DEVICE
495	}
496};
497
498static void __init lubbock_map_io(void)
499{
500	pxa_map_io();
501	iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
502
503	/* SSP data pins */
504	pxa_gpio_mode(GPIO23_SCLK_MD);
505	pxa_gpio_mode(GPIO25_STXD_MD);
506	pxa_gpio_mode(GPIO26_SRXD_MD);
507
508	/* This enables the BTUART */
509	pxa_gpio_mode(GPIO42_BTRXD_MD);
510	pxa_gpio_mode(GPIO43_BTTXD_MD);
511	pxa_gpio_mode(GPIO44_BTCTS_MD);
512	pxa_gpio_mode(GPIO45_BTRTS_MD);
513
514	/* This is for the SMC chip select */
515	pxa_gpio_mode(GPIO79_nCS_3_MD);
516
517	/* setup sleep mode values */
518	PWER  = 0x00000002;
519	PFER  = 0x00000000;
520	PRER  = 0x00000002;
521	PGSR0 = 0x00008000;
522	PGSR1 = 0x003F0202;
523	PGSR2 = 0x0001C000;
524	PCFR |= PCFR_OPDE;
525}
526
527MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
528	/* Maintainer: MontaVista Software Inc. */
529	.phys_io	= 0x40000000,
530	.io_pg_offst	= (io_p2v(0x40000000) >> 18) & 0xfffc,
531	.map_io		= lubbock_map_io,
532	.init_irq	= lubbock_init_irq,
533	.timer		= &pxa_timer,
534	.init_machine	= lubbock_init,
535MACHINE_END
536