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balloon3.c

/*
 *  linux/arch/arm/mach-pxa/balloon3.c
 *
 *  Support for Balloonboard.org Balloon3 board.
 *
 *  Author: Nick Bane, Wookey, Jonathan McDowell
 *  Created:      June, 2006
 *  Copyright:    Toby Churchill Ltd
 *  Derived from mainstone.c, by Nico Pitre
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/bitops.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/ioport.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/types.h>

#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <asm/sizes.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>

#include <mach/pxa27x.h>
#include <mach/balloon3.h>
#include <mach/audio.h>
#include <mach/pxafb.h>
#include <mach/mmc.h>
#include <mach/udc.h>
#include <mach/pxa27x-udc.h>
#include <mach/irda.h>
#include <mach/ohci.h>

#include <plat/i2c.h>

#include "generic.h"
#include "devices.h"

static unsigned long balloon3_irq_enabled;

static unsigned long balloon3_features_present =
            (1 << BALLOON3_FEATURE_OHCI) | (1 << BALLOON3_FEATURE_CF) |
            (1 << BALLOON3_FEATURE_AUDIO) |
            (1 << BALLOON3_FEATURE_TOPPOLY);

int balloon3_has(enum balloon3_features feature)
{
      return (balloon3_features_present & (1 << feature)) ? 1 : 0;
}
EXPORT_SYMBOL_GPL(balloon3_has);

int __init parse_balloon3_features(char *arg)
{
      if (!arg)
            return 0;

      return strict_strtoul(arg, 0, &balloon3_features_present);
}
early_param("balloon3_features", parse_balloon3_features);

static void balloon3_mask_irq(unsigned int irq)
{
      int balloon3_irq = (irq - BALLOON3_IRQ(0));
      balloon3_irq_enabled &= ~(1 << balloon3_irq);
      __raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
}

static void balloon3_unmask_irq(unsigned int irq)
{
      int balloon3_irq = (irq - BALLOON3_IRQ(0));
      balloon3_irq_enabled |= (1 << balloon3_irq);
      __raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
}

static struct irq_chip balloon3_irq_chip = {
      .name       = "FPGA",
      .ack        = balloon3_mask_irq,
      .mask       = balloon3_mask_irq,
      .unmask           = balloon3_unmask_irq,
};

static void balloon3_irq_handler(unsigned int irq, struct irq_desc *desc)
{
      unsigned long pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
                              balloon3_irq_enabled;

      do {
            /* clear useless edge notification */
            if (desc->chip->ack)
                  desc->chip->ack(BALLOON3_AUX_NIRQ);
            while (pending) {
                  irq = BALLOON3_IRQ(0) + __ffs(pending);
                  generic_handle_irq(irq);
                  pending &= pending - 1;
            }
            pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
                        balloon3_irq_enabled;
      } while (pending);
}

static void __init balloon3_init_irq(void)
{
      int irq;

      pxa27x_init_irq();
      /* setup extra Balloon3 irqs */
      for (irq = BALLOON3_IRQ(0); irq <= BALLOON3_IRQ(7); irq++) {
            set_irq_chip(irq, &balloon3_irq_chip);
            set_irq_handler(irq, handle_level_irq);
            set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
      }

      set_irq_chained_handler(BALLOON3_AUX_NIRQ, balloon3_irq_handler);
      set_irq_type(BALLOON3_AUX_NIRQ, IRQ_TYPE_EDGE_FALLING);

      pr_debug("%s: chained handler installed - irq %d automatically "
            "enabled\n", __func__, BALLOON3_AUX_NIRQ);
}

static void balloon3_backlight_power(int on)
{
      pr_debug("%s: power is %s\n", __func__, on ? "on" : "off");
      gpio_set_value(BALLOON3_GPIO_RUN_BACKLIGHT, on);
}

static unsigned long balloon3_lcd_pin_config[] = {
      /* LCD - 16bpp Active TFT */
      GPIO58_LCD_LDD_0,
      GPIO59_LCD_LDD_1,
      GPIO60_LCD_LDD_2,
      GPIO61_LCD_LDD_3,
      GPIO62_LCD_LDD_4,
      GPIO63_LCD_LDD_5,
      GPIO64_LCD_LDD_6,
      GPIO65_LCD_LDD_7,
      GPIO66_LCD_LDD_8,
      GPIO67_LCD_LDD_9,
      GPIO68_LCD_LDD_10,
      GPIO69_LCD_LDD_11,
      GPIO70_LCD_LDD_12,
      GPIO71_LCD_LDD_13,
      GPIO72_LCD_LDD_14,
      GPIO73_LCD_LDD_15,
      GPIO74_LCD_FCLK,
      GPIO75_LCD_LCLK,
      GPIO76_LCD_PCLK,
      GPIO77_LCD_BIAS,

      GPIO99_GPIO,            /* Backlight */
};

static struct pxafb_mode_info balloon3_lcd_modes[] = {
      {
            .pixclock         = 38000,
            .xres             = 480,
            .yres             = 640,
            .bpp              = 16,
            .hsync_len        = 8,
            .left_margin            = 8,
            .right_margin           = 8,
            .vsync_len        = 2,
            .upper_margin           = 4,
            .lower_margin           = 5,
            .sync             = 0,
      },
};

static struct pxafb_mach_info balloon3_pxafb_info = {
      .modes                  = balloon3_lcd_modes,
      .num_modes        = ARRAY_SIZE(balloon3_lcd_modes),
      .lcd_conn         = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
      .pxafb_backlight_power  = balloon3_backlight_power,
};

static unsigned long balloon3_mmc_pin_config[] = {
      GPIO32_MMC_CLK,
      GPIO92_MMC_DAT_0,
      GPIO109_MMC_DAT_1,
      GPIO110_MMC_DAT_2,
      GPIO111_MMC_DAT_3,
      GPIO112_MMC_CMD,
};

static void balloon3_mci_setpower(struct device *dev, unsigned int vdd)
{
      struct pxamci_platform_data *p_d = dev->platform_data;

      if ((1 << vdd) & p_d->ocr_mask) {
            pr_debug("%s: on\n", __func__);
            /* FIXME something to prod here? */
      } else {
            pr_debug("%s: off\n", __func__);
            /* FIXME something to prod here? */
      }
}

static struct pxamci_platform_data balloon3_mci_platform_data = {
      .ocr_mask   = MMC_VDD_32_33|MMC_VDD_33_34,
      .setpower   = balloon3_mci_setpower,
};

static int balloon3_udc_is_connected(void)
{
      pr_debug("%s: udc connected\n", __func__);
      return 1;
}

static void balloon3_udc_command(int cmd)
{
      switch (cmd) {
      case PXA2XX_UDC_CMD_CONNECT:
            UP2OCR |= (UP2OCR_DPPUE + UP2OCR_DPPUBE);
            pr_debug("%s: connect\n", __func__);
            break;
      case PXA2XX_UDC_CMD_DISCONNECT:
            UP2OCR &= ~UP2OCR_DPPUE;
            pr_debug("%s: disconnect\n", __func__);
            break;
      }
}

static struct pxa2xx_udc_mach_info balloon3_udc_info = {
      .udc_is_connected = balloon3_udc_is_connected,
      .udc_command      = balloon3_udc_command,
};

static struct pxaficp_platform_data balloon3_ficp_platform_data = {
      .transceiver_cap  = IR_SIRMODE | IR_FIRMODE | IR_OFF,
};

static unsigned long balloon3_ohci_pin_config[] = {
      GPIO88_USBH1_PWR,
      GPIO89_USBH1_PEN,
};

static struct pxaohci_platform_data balloon3_ohci_platform_data = {
      .port_mode  = PMM_PERPORT_MODE,
      .flags            = ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
};

static unsigned long balloon3_pin_config[] __initdata = {
      /* Select BTUART 'COM1/ttyS0' as IO option for pins 42/43/44/45 */
      GPIO42_BTUART_RXD,
      GPIO43_BTUART_TXD,
      GPIO44_BTUART_CTS,
      GPIO45_BTUART_RTS,

      /* Wakeup GPIO */
      GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,

      /* NAND & IDLE LED GPIOs */
      GPIO9_GPIO,
      GPIO10_GPIO,
};

static struct gpio_led balloon3_gpio_leds[] = {
      {
            .name             = "balloon3:green:idle",
            .default_trigger  = "heartbeat",
            .gpio             = BALLOON3_GPIO_LED_IDLE,
            .active_low       = 1,
      },
      {
            .name             = "balloon3:green:nand",
            .default_trigger  = "nand-disk",
            .gpio             = BALLOON3_GPIO_LED_NAND,
            .active_low       = 1,
      },
};

static struct gpio_led_platform_data balloon3_gpio_leds_platform_data = {
      .leds       = balloon3_gpio_leds,
      .num_leds   = ARRAY_SIZE(balloon3_gpio_leds),
};

static struct platform_device balloon3led_device = {
      .name = "leds-gpio",
      .id   = -1,
      .dev  = {
            .platform_data    = &balloon3_gpio_leds_platform_data,
      },
};

static void __init balloon3_init(void)
{
      pr_info("Initialising Balloon3\n");

      /* system bus arbiter setting
       * - Core_Park
       * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
       */
      ARB_CNTRL = ARB_CORE_PARK | 0x234;

      pxa_set_i2c_info(NULL);
      if (balloon3_has(BALLOON3_FEATURE_AUDIO))
            pxa_set_ac97_info(NULL);

      if (balloon3_has(BALLOON3_FEATURE_TOPPOLY)) {
            pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_lcd_pin_config));
            gpio_request(BALLOON3_GPIO_RUN_BACKLIGHT,
                  "LCD Backlight Power");
            gpio_direction_output(BALLOON3_GPIO_RUN_BACKLIGHT, 1);
            set_pxa_fb_info(&balloon3_pxafb_info);
      }

      if (balloon3_has(BALLOON3_FEATURE_MMC)) {
            pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_mmc_pin_config));
            pxa_set_mci_info(&balloon3_mci_platform_data);
      }
      pxa_set_ficp_info(&balloon3_ficp_platform_data);
      if (balloon3_has(BALLOON3_FEATURE_OHCI)) {
            pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_ohci_pin_config));
            pxa_set_ohci_info(&balloon3_ohci_platform_data);
      }
      pxa_set_udc_info(&balloon3_udc_info);

      pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_pin_config));

      platform_device_register(&balloon3led_device);
}

static struct map_desc balloon3_io_desc[] __initdata = {
      {     /* CPLD/FPGA */
            .virtual    =  BALLOON3_FPGA_VIRT,
            .pfn        = __phys_to_pfn(BALLOON3_FPGA_PHYS),
            .length           = BALLOON3_FPGA_LENGTH,
            .type       = MT_DEVICE,
      },
};

static void __init balloon3_map_io(void)
{
      pxa_map_io();
      iotable_init(balloon3_io_desc, ARRAY_SIZE(balloon3_io_desc));
}

MACHINE_START(BALLOON3, "Balloon3")
      /* Maintainer: Nick Bane. */
      .phys_io    = 0x40000000,
      .io_pg_offst      = (io_p2v(0x40000000) >> 18) & 0xfffc,
      .map_io           = balloon3_map_io,
      .init_irq   = balloon3_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = balloon3_init,
      .boot_params      = PHYS_OFFSET + 0x100,
MACHINE_END

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