Merge branch 'docs' of git://git.lwn.net/linux-2.6
[linux-2.6] / arch / arm / mach-pxa / lubbock.c
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 #include <linux/smc91x.h>
25
26 #include <linux/spi/spi.h>
27 #include <linux/spi/ads7846.h>
28 #include <mach/pxa2xx_spi.h>
29
30 #include <asm/setup.h>
31 #include <asm/memory.h>
32 #include <asm/mach-types.h>
33 #include <mach/hardware.h>
34 #include <asm/irq.h>
35 #include <asm/sizes.h>
36
37 #include <asm/mach/arch.h>
38 #include <asm/mach/map.h>
39 #include <asm/mach/irq.h>
40 #include <asm/mach/flash.h>
41
42 #include <asm/hardware/sa1111.h>
43
44 #include <mach/pxa-regs.h>
45 #include <mach/pxa2xx-regs.h>
46 #include <mach/mfp-pxa25x.h>
47 #include <mach/audio.h>
48 #include <mach/lubbock.h>
49 #include <mach/udc.h>
50 #include <mach/irda.h>
51 #include <mach/pxafb.h>
52 #include <mach/mmc.h>
53
54 #include "generic.h"
55 #include "clock.h"
56 #include "devices.h"
57
58 static unsigned long lubbock_pin_config[] __initdata = {
59         GPIO15_nCS_1,   /* CS1 - Flash */
60         GPIO78_nCS_2,   /* CS2 - Baseboard FGPA */
61         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
62         GPIO80_nCS_4,   /* CS4 - SA1111 */
63
64         /* SSP data pins */
65         GPIO23_SSP1_SCLK,
66         GPIO25_SSP1_TXD,
67         GPIO26_SSP1_RXD,
68
69         /* LCD - 16bpp DSTN */
70         GPIO58_LCD_LDD_0,
71         GPIO59_LCD_LDD_1,
72         GPIO60_LCD_LDD_2,
73         GPIO61_LCD_LDD_3,
74         GPIO62_LCD_LDD_4,
75         GPIO63_LCD_LDD_5,
76         GPIO64_LCD_LDD_6,
77         GPIO65_LCD_LDD_7,
78         GPIO66_LCD_LDD_8,
79         GPIO67_LCD_LDD_9,
80         GPIO68_LCD_LDD_10,
81         GPIO69_LCD_LDD_11,
82         GPIO70_LCD_LDD_12,
83         GPIO71_LCD_LDD_13,
84         GPIO72_LCD_LDD_14,
85         GPIO73_LCD_LDD_15,
86         GPIO74_LCD_FCLK,
87         GPIO75_LCD_LCLK,
88         GPIO76_LCD_PCLK,
89
90         /* BTUART */
91         GPIO42_BTUART_RXD,
92         GPIO43_BTUART_TXD,
93         GPIO44_BTUART_CTS,
94         GPIO45_BTUART_RTS,
95
96         /* PC Card */
97         GPIO48_nPOE,
98         GPIO49_nPWE,
99         GPIO50_nPIOR,
100         GPIO51_nPIOW,
101         GPIO52_nPCE_1,
102         GPIO53_nPCE_2,
103         GPIO54_nPSKTSEL,
104         GPIO55_nPREG,
105         GPIO56_nPWAIT,
106         GPIO57_nIOIS16,
107
108         /* MMC */
109         GPIO6_MMC_CLK,
110         GPIO8_MMC_CS0,
111
112         /* wakeup */
113         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
114 };
115
116 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
117
118 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
119 {
120         unsigned long flags;
121
122         local_irq_save(flags);
123         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
124         local_irq_restore(flags);
125 }
126 EXPORT_SYMBOL(lubbock_set_misc_wr);
127
128 static unsigned long lubbock_irq_enabled;
129
130 static void lubbock_mask_irq(unsigned int irq)
131 {
132         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
133         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
134 }
135
136 static void lubbock_unmask_irq(unsigned int irq)
137 {
138         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
139         /* the irq can be acknowledged only if deasserted, so it's done here */
140         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
141         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
142 }
143
144 static struct irq_chip lubbock_irq_chip = {
145         .name           = "FPGA",
146         .ack            = lubbock_mask_irq,
147         .mask           = lubbock_mask_irq,
148         .unmask         = lubbock_unmask_irq,
149 };
150
151 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
152 {
153         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
154         do {
155                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
156                 if (likely(pending)) {
157                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
158                         generic_handle_irq(irq);
159                 }
160                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
161         } while (pending);
162 }
163
164 static void __init lubbock_init_irq(void)
165 {
166         int irq;
167
168         pxa25x_init_irq();
169
170         /* setup extra lubbock irqs */
171         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
172                 set_irq_chip(irq, &lubbock_irq_chip);
173                 set_irq_handler(irq, handle_level_irq);
174                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
175         }
176
177         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
178         set_irq_type(IRQ_GPIO(0), IRQ_TYPE_EDGE_FALLING);
179 }
180
181 #ifdef CONFIG_PM
182
183 static int lubbock_irq_resume(struct sys_device *dev)
184 {
185         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
186         return 0;
187 }
188
189 static struct sysdev_class lubbock_irq_sysclass = {
190         .name = "cpld_irq",
191         .resume = lubbock_irq_resume,
192 };
193
194 static struct sys_device lubbock_irq_device = {
195         .cls = &lubbock_irq_sysclass,
196 };
197
198 static int __init lubbock_irq_device_init(void)
199 {
200         int ret = -ENODEV;
201
202         if (machine_is_lubbock()) {
203                 ret = sysdev_class_register(&lubbock_irq_sysclass);
204                 if (ret == 0)
205                         ret = sysdev_register(&lubbock_irq_device);
206         }
207         return ret;
208 }
209
210 device_initcall(lubbock_irq_device_init);
211
212 #endif
213
214 static int lubbock_udc_is_connected(void)
215 {
216         return (LUB_MISC_RD & (1 << 9)) == 0;
217 }
218
219 static struct pxa2xx_udc_mach_info udc_info __initdata = {
220         .udc_is_connected       = lubbock_udc_is_connected,
221         // no D+ pullup; lubbock can't connect/disconnect in software
222 };
223
224 static struct resource sa1111_resources[] = {
225         [0] = {
226                 .start  = 0x10000000,
227                 .end    = 0x10001fff,
228                 .flags  = IORESOURCE_MEM,
229         },
230         [1] = {
231                 .start  = LUBBOCK_SA1111_IRQ,
232                 .end    = LUBBOCK_SA1111_IRQ,
233                 .flags  = IORESOURCE_IRQ,
234         },
235 };
236
237 static struct platform_device sa1111_device = {
238         .name           = "sa1111",
239         .id             = -1,
240         .num_resources  = ARRAY_SIZE(sa1111_resources),
241         .resource       = sa1111_resources,
242 };
243
244 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
245  * you can select it to replace the ucb1400 by switching the touchscreen cable
246  * (to J5) and poking board registers (as done below).  Else it's only useful
247  * for the temperature sensors.
248  */
249 static struct pxa2xx_spi_master pxa_ssp_master_info = {
250         .num_chipselect = 1,
251 };
252
253 static int lubbock_ads7846_pendown_state(void)
254 {
255         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
256         return 0;
257 }
258
259 static struct ads7846_platform_data ads_info = {
260         .model                  = 7846,
261         .vref_delay_usecs       = 100,          /* internal, no cap */
262         .get_pendown_state      = lubbock_ads7846_pendown_state,
263         // .x_plate_ohms                = 500,  /* GUESS! */
264         // .y_plate_ohms                = 500,  /* GUESS! */
265 };
266
267 static void ads7846_cs(u32 command)
268 {
269         static const unsigned   TS_nCS = 1 << 11;
270         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
271 }
272
273 static struct pxa2xx_spi_chip ads_hw = {
274         .tx_threshold           = 1,
275         .rx_threshold           = 2,
276         .cs_control             = ads7846_cs,
277 };
278
279 static struct spi_board_info spi_board_info[] __initdata = { {
280         .modalias       = "ads7846",
281         .platform_data  = &ads_info,
282         .controller_data = &ads_hw,
283         .irq            = LUBBOCK_BB_IRQ,
284         .max_speed_hz   = 120000 /* max sample rate at 3V */
285                                 * 26 /* command + data + overhead */,
286         .bus_num        = 1,
287         .chip_select    = 0,
288 },
289 };
290
291 static struct resource smc91x_resources[] = {
292         [0] = {
293                 .name   = "smc91x-regs",
294                 .start  = 0x0c000c00,
295                 .end    = 0x0c0fffff,
296                 .flags  = IORESOURCE_MEM,
297         },
298         [1] = {
299                 .start  = LUBBOCK_ETH_IRQ,
300                 .end    = LUBBOCK_ETH_IRQ,
301                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
302         },
303         [2] = {
304                 .name   = "smc91x-attrib",
305                 .start  = 0x0e000000,
306                 .end    = 0x0e0fffff,
307                 .flags  = IORESOURCE_MEM,
308         },
309 };
310
311 static struct smc91x_platdata lubbock_smc91x_info = {
312         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
313 };
314
315 static struct platform_device smc91x_device = {
316         .name           = "smc91x",
317         .id             = -1,
318         .num_resources  = ARRAY_SIZE(smc91x_resources),
319         .resource       = smc91x_resources,
320         .dev            = {
321                 .platform_data = &lubbock_smc91x_info,
322         },
323 };
324
325 static struct resource flash_resources[] = {
326         [0] = {
327                 .start  = 0x00000000,
328                 .end    = SZ_64M - 1,
329                 .flags  = IORESOURCE_MEM,
330         },
331         [1] = {
332                 .start  = 0x04000000,
333                 .end    = 0x04000000 + SZ_64M - 1,
334                 .flags  = IORESOURCE_MEM,
335         },
336 };
337
338 static struct mtd_partition lubbock_partitions[] = {
339         {
340                 .name =         "Bootloader",
341                 .size =         0x00040000,
342                 .offset =       0,
343                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
344         },{
345                 .name =         "Kernel",
346                 .size =         0x00100000,
347                 .offset =       0x00040000,
348         },{
349                 .name =         "Filesystem",
350                 .size =         MTDPART_SIZ_FULL,
351                 .offset =       0x00140000
352         }
353 };
354
355 static struct flash_platform_data lubbock_flash_data[2] = {
356         {
357                 .map_name       = "cfi_probe",
358                 .parts          = lubbock_partitions,
359                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
360         }, {
361                 .map_name       = "cfi_probe",
362                 .parts          = NULL,
363                 .nr_parts       = 0,
364         }
365 };
366
367 static struct platform_device lubbock_flash_device[2] = {
368         {
369                 .name           = "pxa2xx-flash",
370                 .id             = 0,
371                 .dev = {
372                         .platform_data = &lubbock_flash_data[0],
373                 },
374                 .resource = &flash_resources[0],
375                 .num_resources = 1,
376         },
377         {
378                 .name           = "pxa2xx-flash",
379                 .id             = 1,
380                 .dev = {
381                         .platform_data = &lubbock_flash_data[1],
382                 },
383                 .resource = &flash_resources[1],
384                 .num_resources = 1,
385         },
386 };
387
388 static struct platform_device *devices[] __initdata = {
389         &sa1111_device,
390         &smc91x_device,
391         &lubbock_flash_device[0],
392         &lubbock_flash_device[1],
393 };
394
395 static struct pxafb_mode_info sharp_lm8v31_mode = {
396         .pixclock       = 270000,
397         .xres           = 640,
398         .yres           = 480,
399         .bpp            = 16,
400         .hsync_len      = 1,
401         .left_margin    = 3,
402         .right_margin   = 3,
403         .vsync_len      = 1,
404         .upper_margin   = 0,
405         .lower_margin   = 0,
406         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
407         .cmap_greyscale = 0,
408 };
409
410 static struct pxafb_mach_info sharp_lm8v31 = {
411         .modes          = &sharp_lm8v31_mode,
412         .num_modes      = 1,
413         .cmap_inverse   = 0,
414         .cmap_static    = 0,
415         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
416                           LCD_AC_BIAS_FREQ(255),
417 };
418
419 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
420
421 static void lubbock_mmc_poll(unsigned long);
422 static irq_handler_t mmc_detect_int;
423
424 static struct timer_list mmc_timer = {
425         .function       = lubbock_mmc_poll,
426 };
427
428 static void lubbock_mmc_poll(unsigned long data)
429 {
430         unsigned long flags;
431
432         /* clear any previous irq state, then ... */
433         local_irq_save(flags);
434         LUB_IRQ_SET_CLR &= ~(1 << 0);
435         local_irq_restore(flags);
436
437         /* poll until mmc/sd card is removed */
438         if (LUB_IRQ_SET_CLR & (1 << 0))
439                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
440         else {
441                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
442                 enable_irq(LUBBOCK_SD_IRQ);
443         }
444 }
445
446 static irqreturn_t lubbock_detect_int(int irq, void *data)
447 {
448         /* IRQ is level triggered; disable, and poll for removal */
449         disable_irq(irq);
450         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
451
452         return mmc_detect_int(irq, data);
453 }
454
455 static int lubbock_mci_init(struct device *dev,
456                 irq_handler_t detect_int,
457                 void *data)
458 {
459         /* detect card insert/eject */
460         mmc_detect_int = detect_int;
461         init_timer(&mmc_timer);
462         mmc_timer.data = (unsigned long) data;
463         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
464                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
465 }
466
467 static int lubbock_mci_get_ro(struct device *dev)
468 {
469         return (LUB_MISC_RD & (1 << 2)) != 0;
470 }
471
472 static void lubbock_mci_exit(struct device *dev, void *data)
473 {
474         free_irq(LUBBOCK_SD_IRQ, data);
475         del_timer_sync(&mmc_timer);
476 }
477
478 static struct pxamci_platform_data lubbock_mci_platform_data = {
479         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
480         .detect_delay   = 1,
481         .init           = lubbock_mci_init,
482         .get_ro         = lubbock_mci_get_ro,
483         .exit           = lubbock_mci_exit,
484 };
485
486 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
487 {
488         unsigned long flags;
489
490         local_irq_save(flags);
491         if (mode & IR_SIRMODE) {
492                 LUB_MISC_WR &= ~(1 << 4);
493         } else if (mode & IR_FIRMODE) {
494                 LUB_MISC_WR |= 1 << 4;
495         }
496         pxa2xx_transceiver_mode(dev, mode);
497         local_irq_restore(flags);
498 }
499
500 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
501         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
502         .transceiver_mode = lubbock_irda_transceiver_mode,
503 };
504
505 static void __init lubbock_init(void)
506 {
507         int flashboot = (LUB_CONF_SWITCHES & 1);
508
509         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
510
511         clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
512         pxa_set_udc_info(&udc_info);
513         set_pxa_fb_info(&sharp_lm8v31);
514         pxa_set_mci_info(&lubbock_mci_platform_data);
515         pxa_set_ficp_info(&lubbock_ficp_platform_data);
516         pxa_set_ac97_info(NULL);
517
518         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
519                 (BOOT_DEF & 1) ? 2 : 4;
520         /* Compensate for the nROMBT switch which swaps the flash banks */
521         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
522                flashboot?"Flash":"ROM", flashboot);
523
524         lubbock_flash_data[flashboot^1].name = "application-flash";
525         lubbock_flash_data[flashboot].name = "boot-rom";
526         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
527
528         pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
529         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
530 }
531
532 static struct map_desc lubbock_io_desc[] __initdata = {
533         {       /* CPLD */
534                 .virtual        =  LUBBOCK_FPGA_VIRT,
535                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
536                 .length         = 0x00100000,
537                 .type           = MT_DEVICE
538         }
539 };
540
541 static void __init lubbock_map_io(void)
542 {
543         pxa_map_io();
544         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
545
546         PCFR |= PCFR_OPDE;
547 }
548
549 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
550         /* Maintainer: MontaVista Software Inc. */
551         .phys_io        = 0x40000000,
552         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
553         .map_io         = lubbock_map_io,
554         .init_irq       = lubbock_init_irq,
555         .timer          = &pxa_timer,
556         .init_machine   = lubbock_init,
557 MACHINE_END