arch/arm/mach-pxa/balloon3.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/balloon3.c
   3  *
   4  *  Support for Balloonboard.org Balloon3 board.
   5  *
   6  *  Author:     Nick Bane, Wookey, Jonathan McDowell
   7  *  Created:    June, 2006
   8  *  Copyright:  Toby Churchill Ltd
   9  *  Derived from mainstone.c, by Nico Pitre
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/sysdev.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/sched.h>
  21 #include <linux/bitops.h>
  22 #include <linux/fb.h>
  23 #include <linux/gpio.h>
  24 #include <linux/ioport.h>
  25 #include <linux/mtd/mtd.h>
  26 #include <linux/mtd/partitions.h>
  27 #include <linux/types.h>
  28
  29 #include <asm/setup.h>
  30 #include <asm/mach-types.h>
  31 #include <asm/irq.h>
  32 #include <asm/sizes.h>
  33
  34 #include <asm/mach/arch.h>
  35 #include <asm/mach/map.h>
  36 #include <asm/mach/irq.h>
  37 #include <asm/mach/flash.h>
  38
  39 #include <mach/pxa27x.h>
  40 #include <mach/balloon3.h>
  41 #include <mach/audio.h>
  42 #include <mach/pxafb.h>
  43 #include <mach/mmc.h>
  44 #include <mach/udc.h>
  45 #include <mach/pxa27x-udc.h>
  46 #include <mach/irda.h>
  47 #include <mach/ohci.h>
  48
  49 #include <plat/i2c.h>
  50
  51 #include "generic.h"
  52 #include "devices.h"
  53
  54 /******************************************************************************
  55  * Pin configuration
  56  ******************************************************************************/
  57 static unsigned long balloon3_pin_config[] __initdata = {
  58         /* Select BTUART 'COM1/ttyS0' as IO option for pins 42/43/44/45 */
  59         GPIO42_BTUART_RXD,
  60         GPIO43_BTUART_TXD,
  61         GPIO44_BTUART_CTS,
  62         GPIO45_BTUART_RTS,
  63
  64         /* Wakeup GPIO */
  65         GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
  66
  67         /* NAND & IDLE LED GPIOs */
  68         GPIO9_GPIO,
  69         GPIO10_GPIO,
  70 };
  71
  72 /******************************************************************************
  73  * Audio and Touchscreen
  74  ******************************************************************************/
  75 static unsigned long balloon3_ac97_pin_config[] = {
  76         GPIO28_AC97_BITCLK,
  77         GPIO29_AC97_SDATA_IN_0,
  78         GPIO30_AC97_SDATA_OUT,
  79         GPIO31_AC97_SYNC,
  80         GPIO113_AC97_nRESET,
  81 };
  82
  83 /******************************************************************************
  84  * Framebuffer
  85  ******************************************************************************/
  86
  87 static void balloon3_backlight_power(int on)
  88 {
  89         pr_debug("%s: power is %s\n", __func__, on ? "on" : "off");
  90         gpio_set_value(BALLOON3_GPIO_RUN_BACKLIGHT, on);
  91 }
  92
  93 static struct pxafb_mode_info balloon3_lcd_modes[] = {
  94         {
  95                 .pixclock               = 38000,
  96                 .xres                   = 480,
  97                 .yres                   = 640,
  98                 .bpp                    = 16,
  99                 .hsync_len              = 8,
 100                 .left_margin            = 8,
 101                 .right_margin           = 8,
 102                 .vsync_len              = 2,
 103                 .upper_margin           = 4,
 104                 .lower_margin           = 5,
 105                 .sync                   = 0,
 106         },
 107 };
 108
 109 static struct pxafb_mach_info balloon3_pxafb_info = {
 110         .modes                  = balloon3_lcd_modes,
 111         .num_modes              = ARRAY_SIZE(balloon3_lcd_modes),
 112         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 113         .pxafb_backlight_power  = balloon3_backlight_power,
 114 };
 115
 116 /******************************************************************************
 117  * SD/MMC card controller
 118  ******************************************************************************/
 119 static unsigned long balloon3_mmc_pin_config[] = {
 120         GPIO32_MMC_CLK,
 121         GPIO92_MMC_DAT_0,
 122         GPIO109_MMC_DAT_1,
 123         GPIO110_MMC_DAT_2,
 124         GPIO111_MMC_DAT_3,
 125         GPIO112_MMC_CMD,
 126 };
 127
 128 static void balloon3_mci_setpower(struct device *dev, unsigned int vdd)
 129 {
 130         struct pxamci_platform_data *p_d = dev->platform_data;
 131
 132         if ((1 << vdd) & p_d->ocr_mask) {
 133                 pr_debug("%s: on\n", __func__);
 134                 /* FIXME something to prod here? */
 135         } else {
 136                 pr_debug("%s: off\n", __func__);
 137                 /* FIXME something to prod here? */
 138         }
 139 }
 140
 141 static struct pxamci_platform_data balloon3_mci_platform_data = {
 142         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 143         .setpower       = balloon3_mci_setpower,
 144 };
 145
 146 /******************************************************************************
 147  * USB Gadget
 148  ******************************************************************************/
 149 static int balloon3_udc_is_connected(void)
 150 {
 151         pr_debug("%s: udc connected\n", __func__);
 152         return 1;
 153 }
 154
 155 static void balloon3_udc_command(int cmd)
 156 {
 157         switch (cmd) {
 158         case PXA2XX_UDC_CMD_CONNECT:
 159                 UP2OCR |= (UP2OCR_DPPUE + UP2OCR_DPPUBE);
 160                 pr_debug("%s: connect\n", __func__);
 161                 break;
 162         case PXA2XX_UDC_CMD_DISCONNECT:
 163                 UP2OCR &= ~UP2OCR_DPPUE;
 164                 pr_debug("%s: disconnect\n", __func__);
 165                 break;
 166         }
 167 }
 168
 169 static struct pxa2xx_udc_mach_info balloon3_udc_info = {
 170         .udc_is_connected = balloon3_udc_is_connected,
 171         .udc_command      = balloon3_udc_command,
 172 };
 173
 174 /******************************************************************************
 175  * IrDA
 176  ******************************************************************************/
 177 static struct pxaficp_platform_data balloon3_ficp_platform_data = {
 178         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE | IR_OFF,
 179 };
 180
 181 /******************************************************************************
 182  * USB Host
 183  ******************************************************************************/
 184 static unsigned long balloon3_ohci_pin_config[] = {
 185         GPIO88_USBH1_PWR,
 186         GPIO89_USBH1_PEN,
 187 };
 188
 189 static struct pxaohci_platform_data balloon3_ohci_platform_data = {
 190         .port_mode      = PMM_PERPORT_MODE,
 191         .flags          = ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
 192 };
 193
 194 /******************************************************************************
 195  * LED
 196  ******************************************************************************/
 197 static struct gpio_led balloon3_gpio_leds[] = {
 198         {
 199                 .name                   = "balloon3:green:idle",
 200                 .default_trigger        = "heartbeat",
 201                 .gpio                   = BALLOON3_GPIO_LED_IDLE,
 202                 .active_low             = 1,
 203         },
 204         {
 205                 .name                   = "balloon3:green:nand",
 206                 .default_trigger        = "nand-disk",
 207                 .gpio                   = BALLOON3_GPIO_LED_NAND,
 208                 .active_low             = 1,
 209         },
 210 };
 211
 212 static struct gpio_led_platform_data balloon3_gpio_leds_platform_data = {
 213         .leds           = balloon3_gpio_leds,
 214         .num_leds       = ARRAY_SIZE(balloon3_gpio_leds),
 215 };
 216
 217 static struct platform_device balloon3led_device = {
 218         .name   = "leds-gpio",
 219         .id     = -1,
 220         .dev    = {
 221                 .platform_data  = &balloon3_gpio_leds_platform_data,
 222         },
 223 };
 224
 225 /******************************************************************************
 226  * Compatibility: Parameter parsing
 227  ******************************************************************************/
 228 static unsigned long balloon3_irq_enabled;
 229
 230 static unsigned long balloon3_features_present =
 231                 (1 << BALLOON3_FEATURE_OHCI) | (1 << BALLOON3_FEATURE_CF) |
 232                 (1 << BALLOON3_FEATURE_AUDIO) |
 233                 (1 << BALLOON3_FEATURE_TOPPOLY);
 234
 235 int balloon3_has(enum balloon3_features feature)
 236 {
 237         return (balloon3_features_present & (1 << feature)) ? 1 : 0;
 238 }
 239 EXPORT_SYMBOL_GPL(balloon3_has);
 240
 241 int __init parse_balloon3_features(char *arg)
 242 {
 243         if (!arg)
 244                 return 0;
 245
 246         return strict_strtoul(arg, 0, &balloon3_features_present);
 247 }
 248 early_param("balloon3_features", parse_balloon3_features);
 249
 250 /******************************************************************************
 251  * FPGA IRQ
 252  ******************************************************************************/
 253 static void balloon3_mask_irq(unsigned int irq)
 254 {
 255         int balloon3_irq = (irq - BALLOON3_IRQ(0));
 256         balloon3_irq_enabled &= ~(1 << balloon3_irq);
 257         __raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
 258 }
 259
 260 static void balloon3_unmask_irq(unsigned int irq)
 261 {
 262         int balloon3_irq = (irq - BALLOON3_IRQ(0));
 263         balloon3_irq_enabled |= (1 << balloon3_irq);
 264         __raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
 265 }
 266
 267 static struct irq_chip balloon3_irq_chip = {
 268         .name           = "FPGA",
 269         .ack            = balloon3_mask_irq,
 270         .mask           = balloon3_mask_irq,
 271         .unmask         = balloon3_unmask_irq,
 272 };
 273
 274 static void balloon3_irq_handler(unsigned int irq, struct irq_desc *desc)
 275 {
 276         unsigned long pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
 277                                         balloon3_irq_enabled;
 278
 279         do {
 280                 /* clear useless edge notification */
 281                 if (desc->chip->ack)
 282                         desc->chip->ack(BALLOON3_AUX_NIRQ);
 283                 while (pending) {
 284                         irq = BALLOON3_IRQ(0) + __ffs(pending);
 285                         generic_handle_irq(irq);
 286                         pending &= pending - 1;
 287                 }
 288                 pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
 289                                 balloon3_irq_enabled;
 290         } while (pending);
 291 }
 292
 293 static void __init balloon3_init_irq(void)
 294 {
 295         int irq;
 296
 297         pxa27x_init_irq();
 298         /* setup extra Balloon3 irqs */
 299         for (irq = BALLOON3_IRQ(0); irq <= BALLOON3_IRQ(7); irq++) {
 300                 set_irq_chip(irq, &balloon3_irq_chip);
 301                 set_irq_handler(irq, handle_level_irq);
 302                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 303         }
 304
 305         set_irq_chained_handler(BALLOON3_AUX_NIRQ, balloon3_irq_handler);
 306         set_irq_type(BALLOON3_AUX_NIRQ, IRQ_TYPE_EDGE_FALLING);
 307
 308         pr_debug("%s: chained handler installed - irq %d automatically "
 309                 "enabled\n", __func__, BALLOON3_AUX_NIRQ);
 310 }
 311
 312 /******************************************************************************
 313  * Machine init
 314  ******************************************************************************/
 315 static void __init balloon3_init(void)
 316 {
 317         pr_info("Initialising Balloon3\n");
 318
 319         /* system bus arbiter setting
 320          * - Core_Park
 321          * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
 322          */
 323         ARB_CNTRL = ARB_CORE_PARK | 0x234;
 324
 325         pxa_set_ffuart_info(NULL);
 326         pxa_set_btuart_info(NULL);
 327         pxa_set_stuart_info(NULL);
 328
 329         pxa_set_i2c_info(NULL);
 330         if (balloon3_has(BALLOON3_FEATURE_AUDIO)) {
 331                 pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_ac97_pin_config));
 332                 pxa_set_ac97_info(NULL);
 333         }
 334
 335         if (balloon3_has(BALLOON3_FEATURE_TOPPOLY)) {
 336                 pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_lcd_pin_config));
 337                 gpio_request(BALLOON3_GPIO_RUN_BACKLIGHT,
 338                         "LCD Backlight Power");
 339                 gpio_direction_output(BALLOON3_GPIO_RUN_BACKLIGHT, 1);
 340                 set_pxa_fb_info(&balloon3_pxafb_info);
 341         }
 342
 343         if (balloon3_has(BALLOON3_FEATURE_MMC)) {
 344                 pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_mmc_pin_config));
 345                 pxa_set_mci_info(&balloon3_mci_platform_data);
 346         }
 347         pxa_set_ficp_info(&balloon3_ficp_platform_data);
 348         if (balloon3_has(BALLOON3_FEATURE_OHCI)) {
 349                 pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_ohci_pin_config));
 350                 pxa_set_ohci_info(&balloon3_ohci_platform_data);
 351         }
 352         pxa_set_udc_info(&balloon3_udc_info);
 353
 354         pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_pin_config));
 355
 356         platform_device_register(&balloon3led_device);
 357 }
 358
 359 static struct map_desc balloon3_io_desc[] __initdata = {
 360         {       /* CPLD/FPGA */
 361                 .virtual        =  BALLOON3_FPGA_VIRT,
 362                 .pfn            = __phys_to_pfn(BALLOON3_FPGA_PHYS),
 363                 .length         = BALLOON3_FPGA_LENGTH,
 364                 .type           = MT_DEVICE,
 365         },
 366 };
 367
 368 static void __init balloon3_map_io(void)
 369 {
 370         pxa_map_io();
 371         iotable_init(balloon3_io_desc, ARRAY_SIZE(balloon3_io_desc));
 372 }
 373
 374 MACHINE_START(BALLOON3, "Balloon3")
 375         /* Maintainer: Nick Bane. */
 376         .phys_io        = 0x40000000,
 377         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 378         .map_io         = balloon3_map_io,
 379         .init_irq       = balloon3_init_irq,
 380         .timer          = &pxa_timer,
 381         .init_machine   = balloon3_init,
 382         .boot_params    = PHYS_OFFSET + 0x100,
 383 MACHINE_END