--- /dev/null
+/*
+ * board-devkit8000.c - TimLL Devkit8000
+ *
+ * Copyright (C) 2009 Kim Botherway
+ * Copyright (C) 2010 Thomas Weber
+ *
+ * Modified from mach-omap2/board-omap3beagle.c
+ *
+ * Initial code: Syed Mohammed Khasim
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/gpio.h>
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
+
+#include <linux/regulator/machine.h>
+#include <linux/i2c/twl.h>
+
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/flash.h>
+
+#include <plat/board.h>
+#include <plat/common.h>
+#include <plat/gpmc.h>
+#include <plat/nand.h>
+#include <plat/usb.h>
+#include <plat/timer-gp.h>
+#include <plat/display.h>
+
+#include <plat/mcspi.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+#include <linux/usb/otg.h>
+#include <linux/dm9000.h>
+#include <linux/interrupt.h>
+
+#include "sdram-micron-mt46h32m32lf-6.h"
+
+#include "mux.h"
+#include "hsmmc.h"
+
+#define GPMC_CS0_BASE 0x60
+#define GPMC_CS_SIZE 0x30
+
+#define NAND_BLOCK_SIZE SZ_128K
+
+#define OMAP_DM9000_GPIO_IRQ 25
+#define OMAP3_DEVKIT_TS_GPIO 27
+
+static struct mtd_partition devkit8000_nand_partitions[] = {
+ /* All the partition sizes are listed in terms of NAND block size */
+ {
+ .name = "X-Loader",
+ .offset = 0,
+ .size = 4 * NAND_BLOCK_SIZE,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+ {
+ .name = "U-Boot",
+ .offset = MTDPART_OFS_APPEND, /* Offset = 0x80000 */
+ .size = 15 * NAND_BLOCK_SIZE,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+ {
+ .name = "U-Boot Env",
+ .offset = MTDPART_OFS_APPEND, /* Offset = 0x260000 */
+ .size = 1 * NAND_BLOCK_SIZE,
+ },
+ {
+ .name = "Kernel",
+ .offset = MTDPART_OFS_APPEND, /* Offset = 0x280000 */
+ .size = 32 * NAND_BLOCK_SIZE,
+ },
+ {
+ .name = "File System",
+ .offset = MTDPART_OFS_APPEND, /* Offset = 0x680000 */
+ .size = MTDPART_SIZ_FULL,
+ },
+};
+
+static struct omap_nand_platform_data devkit8000_nand_data = {
+ .options = NAND_BUSWIDTH_16,
+ .parts = devkit8000_nand_partitions,
+ .nr_parts = ARRAY_SIZE(devkit8000_nand_partitions),
+ .dma_channel = -1, /* disable DMA in OMAP NAND driver */
+};
+
+static struct resource devkit8000_nand_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device devkit8000_nand_device = {
+ .name = "omap2-nand",
+ .id = -1,
+ .dev = {
+ .platform_data = &devkit8000_nand_data,
+ },
+ .num_resources = 1,
+ .resource = &devkit8000_nand_resource,
+};
+
+static struct omap2_hsmmc_info mmc[] = {
+ {
+ .mmc = 1,
+ .wires = 8,
+ .gpio_wp = 29,
+ },
+ {} /* Terminator */
+};
+static struct omap_board_config_kernel devkit8000_config[] __initdata = {
+};
+
+static int devkit8000_panel_enable_lcd(struct omap_dss_device *dssdev)
+{
+ twl_i2c_write_u8(TWL4030_MODULE_GPIO, 0x80, REG_GPIODATADIR1);
+ twl_i2c_write_u8(TWL4030_MODULE_LED, 0x0, 0x0);
+
+ return 0;
+}
+
+static void devkit8000_panel_disable_lcd(struct omap_dss_device *dssdev)
+{
+}
+static int devkit8000_panel_enable_dvi(struct omap_dss_device *dssdev)
+{
+ return 0;
+}
+
+static void devkit8000_panel_disable_dvi(struct omap_dss_device *dssdev)
+{
+}
+
+static int devkit8000_panel_enable_tv(struct omap_dss_device *dssdev)
+{
+
+ return 0;
+}
+
+static void devkit8000_panel_disable_tv(struct omap_dss_device *dssdev)
+{
+}
+
+
+static struct regulator_consumer_supply devkit8000_vmmc1_supply = {
+ .supply = "vmmc",
+};
+
+static struct regulator_consumer_supply devkit8000_vsim_supply = {
+ .supply = "vmmc_aux",
+};
+
+
+static struct omap_dss_device devkit8000_lcd_device = {
+ .name = "lcd",
+ .driver_name = "innolux_at_panel",
+ .type = OMAP_DISPLAY_TYPE_DPI,
+ .phy.dpi.data_lines = 24,
+ .platform_enable = devkit8000_panel_enable_lcd,
+ .platform_disable = devkit8000_panel_disable_lcd,
+};
+static struct omap_dss_device devkit8000_dvi_device = {
+ .name = "dvi",
+ .driver_name = "generic_panel",
+ .type = OMAP_DISPLAY_TYPE_DPI,
+ .phy.dpi.data_lines = 24,
+ .platform_enable = devkit8000_panel_enable_dvi,
+ .platform_disable = devkit8000_panel_disable_dvi,
+};
+
+static struct omap_dss_device devkit8000_tv_device = {
+ .name = "tv",
+ .driver_name = "venc",
+ .type = OMAP_DISPLAY_TYPE_VENC,
+ .phy.venc.type = OMAP_DSS_VENC_TYPE_SVIDEO,
+ .platform_enable = devkit8000_panel_enable_tv,
+ .platform_disable = devkit8000_panel_disable_tv,
+};
+
+
+static struct omap_dss_device *devkit8000_dss_devices[] = {
+ &devkit8000_lcd_device,
+ &devkit8000_dvi_device,
+ &devkit8000_tv_device,
+};
+
+static struct omap_dss_board_info devkit8000_dss_data = {
+ .num_devices = ARRAY_SIZE(devkit8000_dss_devices),
+ .devices = devkit8000_dss_devices,
+ .default_device = &devkit8000_lcd_device,
+};
+
+static struct platform_device devkit8000_dss_device = {
+ .name = "omapdss",
+ .id = -1,
+ .dev = {
+ .platform_data = &devkit8000_dss_data,
+ },
+};
+
+static struct regulator_consumer_supply devkit8000_vdda_dac_supply = {
+ .supply = "vdda_dac",
+ .dev = &devkit8000_dss_device.dev,
+};
+
+static int board_keymap[] = {
+ KEY(0, 0, KEY_1),
+ KEY(1, 0, KEY_2),
+ KEY(2, 0, KEY_3),
+ KEY(0, 1, KEY_4),
+ KEY(1, 1, KEY_5),
+ KEY(2, 1, KEY_6),
+ KEY(3, 1, KEY_F5),
+ KEY(0, 2, KEY_7),
+ KEY(1, 2, KEY_8),
+ KEY(2, 2, KEY_9),
+ KEY(3, 2, KEY_F6),
+ KEY(0, 3, KEY_F7),
+ KEY(1, 3, KEY_0),
+ KEY(2, 3, KEY_F8),
+ PERSISTENT_KEY(4, 5),
+ KEY(4, 4, KEY_VOLUMEUP),
+ KEY(5, 5, KEY_VOLUMEDOWN),
+ 0
+};
+
+static struct matrix_keymap_data board_map_data = {
+ .keymap = board_keymap,
+ .keymap_size = ARRAY_SIZE(board_keymap),
+};
+
+static struct twl4030_keypad_data devkit8000_kp_data = {
+ .keymap_data = &board_map_data,
+ .rows = 6,
+ .cols = 6,
+ .rep = 1,
+};
+
+static struct gpio_led gpio_leds[];
+
+static int devkit8000_twl_gpio_setup(struct device *dev,
+ unsigned gpio, unsigned ngpio)
+{
+ omap_mux_init_gpio(29, OMAP_PIN_INPUT);
+ /* gpio + 0 is "mmc0_cd" (input/IRQ) */
+ mmc[0].gpio_cd = gpio + 0;
+ omap2_hsmmc_init(mmc);
+
+ /* link regulators to MMC adapters */
+ devkit8000_vmmc1_supply.dev = mmc[0].dev;
+ devkit8000_vsim_supply.dev = mmc[0].dev;
+
+ /* REVISIT: need ehci-omap hooks for external VBUS
+ * power switch and overcurrent detect
+ */
+
+ gpio_request(gpio + 1, "EHCI_nOC");
+ gpio_direction_input(gpio + 1);
+
+ /* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
+ gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
+ gpio_direction_output(gpio + TWL4030_GPIO_MAX, 1);
+
+ /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
+ gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
+
+ return 0;
+}
+
+static struct twl4030_gpio_platform_data devkit8000_gpio_data = {
+ .gpio_base = OMAP_MAX_GPIO_LINES,
+ .irq_base = TWL4030_GPIO_IRQ_BASE,
+ .irq_end = TWL4030_GPIO_IRQ_END,
+ .use_leds = true,
+ .pullups = BIT(1),
+ .pulldowns = BIT(2) | BIT(6) | BIT(7) | BIT(8) | BIT(13)
+ | BIT(15) | BIT(16) | BIT(17),
+ .setup = devkit8000_twl_gpio_setup,
+};
+
+static struct regulator_consumer_supply devkit8000_vpll2_supplies[] = {
+ {
+ .supply = "vdvi",
+ .dev = &devkit8000_lcd_device.dev,
+ },
+ {
+ .supply = "vdss_dsi",
+ .dev = &devkit8000_dss_device.dev,
+ }
+};
+
+/* VMMC1 for MMC1 pins CMD, CLK, DAT0..DAT3 (20 mA, plus card == max 220 mA) */
+static struct regulator_init_data devkit8000_vmmc1 = {
+ .constraints = {
+ .min_uV = 1850000,
+ .max_uV = 3150000,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL
+ | REGULATOR_MODE_STANDBY,
+ .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE
+ | REGULATOR_CHANGE_MODE
+ | REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = 1,
+ .consumer_supplies = &devkit8000_vmmc1_supply,
+};
+
+/* VSIM for MMC1 pins DAT4..DAT7 (2 mA, plus card == max 50 mA) */
+static struct regulator_init_data devkit8000_vsim = {
+ .constraints = {
+ .min_uV = 1800000,
+ .max_uV = 3000000,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL
+ | REGULATOR_MODE_STANDBY,
+ .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE
+ | REGULATOR_CHANGE_MODE
+ | REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = 1,
+ .consumer_supplies = &devkit8000_vsim_supply,
+};
+
+/* VDAC for DSS driving S-Video (8 mA unloaded, max 65 mA) */
+static struct regulator_init_data devkit8000_vdac = {
+ .constraints = {
+ .min_uV = 1800000,
+ .max_uV = 1800000,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL
+ | REGULATOR_MODE_STANDBY,
+ .valid_ops_mask = REGULATOR_CHANGE_MODE
+ | REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = 1,
+ .consumer_supplies = &devkit8000_vdda_dac_supply,
+};
+
+/* VPLL2 for digital video outputs */
+static struct regulator_init_data devkit8000_vpll2 = {
+ .constraints = {
+ .name = "VDVI",
+ .min_uV = 1800000,
+ .max_uV = 1800000,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL
+ | REGULATOR_MODE_STANDBY,
+ .valid_ops_mask = REGULATOR_CHANGE_MODE
+ | REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(devkit8000_vpll2_supplies),
+ .consumer_supplies = devkit8000_vpll2_supplies,
+};
+
+static struct twl4030_usb_data devkit8000_usb_data = {
+ .usb_mode = T2_USB_MODE_ULPI,
+};
+
+static struct twl4030_codec_audio_data devkit8000_audio_data = {
+ .audio_mclk = 26000000,
+};
+
+static struct twl4030_codec_data devkit8000_codec_data = {
+ .audio_mclk = 26000000,
+ .audio = &devkit8000_audio_data,
+};
+
+static struct twl4030_platform_data devkit8000_twldata = {
+ .irq_base = TWL4030_IRQ_BASE,
+ .irq_end = TWL4030_IRQ_END,
+
+ /* platform_data for children goes here */
+ .usb = &devkit8000_usb_data,
+ .gpio = &devkit8000_gpio_data,
+ .codec = &devkit8000_codec_data,
+ .vmmc1 = &devkit8000_vmmc1,
+ .vsim = &devkit8000_vsim,
+ .vdac = &devkit8000_vdac,
+ .vpll2 = &devkit8000_vpll2,
+ .keypad = &devkit8000_kp_data,
+};
+
+static struct i2c_board_info __initdata devkit8000_i2c_boardinfo[] = {
+ {
+ I2C_BOARD_INFO("twl4030", 0x48),
+ .flags = I2C_CLIENT_WAKE,
+ .irq = INT_34XX_SYS_NIRQ,
+ .platform_data = &devkit8000_twldata,
+ },
+};
+
+static int __init devkit8000_i2c_init(void)
+{
+ omap_register_i2c_bus(1, 2600, devkit8000_i2c_boardinfo,
+ ARRAY_SIZE(devkit8000_i2c_boardinfo));
+ /* Bus 3 is attached to the DVI port where devices like the pico DLP
+ * projector don't work reliably with 400kHz */
+ omap_register_i2c_bus(3, 400, NULL, 0);
+ return 0;
+}
+
+static struct gpio_led gpio_leds[] = {
+ {
+ .name = "led1",
+ .default_trigger = "heartbeat",
+ .gpio = 186,
+ .active_low = true,
+ },
+ {
+ .name = "led2",
+ .default_trigger = "mmc0",
+ .gpio = 163,
+ .active_low = true,
+ },
+ {
+ .name = "ledB",
+ .default_trigger = "none",
+ .gpio = 153,
+ .active_low = true,
+ },
+ {
+ .name = "led3",
+ .default_trigger = "none",
+ .gpio = 164,
+ .active_low = true,
+ },
+};
+
+static struct gpio_led_platform_data gpio_led_info = {
+ .leds = gpio_leds,
+ .num_leds = ARRAY_SIZE(gpio_leds),
+};
+
+static struct platform_device leds_gpio = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev = {
+ .platform_data = &gpio_led_info,
+ },
+};
+
+static struct gpio_keys_button gpio_buttons[] = {
+ {
+ .code = BTN_EXTRA,
+ .gpio = 26,
+ .desc = "user",
+ .wakeup = 1,
+ },
+};
+
+static struct gpio_keys_platform_data gpio_key_info = {
+ .buttons = gpio_buttons,
+ .nbuttons = ARRAY_SIZE(gpio_buttons),
+};
+
+static struct platform_device keys_gpio = {
+ .name = "gpio-keys",
+ .id = -1,
+ .dev = {
+ .platform_data = &gpio_key_info,
+ },
+};
+
+
+static void __init devkit8000_init_irq(void)
+{
+ omap_board_config = devkit8000_config;
+ omap_board_config_size = ARRAY_SIZE(devkit8000_config);
+ omap2_init_common_hw(mt46h32m32lf6_sdrc_params,
+ mt46h32m32lf6_sdrc_params);
+ omap_init_irq();
+#ifdef CONFIG_OMAP_32K_TIMER
+ omap2_gp_clockevent_set_gptimer(12);
+#endif
+ omap_gpio_init();
+}
+
+static void __init devkit8000_ads7846_init(void)
+{
+ int gpio = OMAP3_DEVKIT_TS_GPIO;
+ int ret;
+
+ ret = gpio_request(gpio, "ads7846_pen_down");
+ if (ret < 0) {
+ printk(KERN_ERR "Failed to request GPIO %d for "
+ "ads7846 pen down IRQ\n", gpio);
+ return;
+ }
+
+ gpio_direction_input(gpio);
+}
+
+static int ads7846_get_pendown_state(void)
+{
+ return !gpio_get_value(OMAP3_DEVKIT_TS_GPIO);
+}
+
+static struct ads7846_platform_data ads7846_config = {
+ .x_max = 0x0fff,
+ .y_max = 0x0fff,
+ .x_plate_ohms = 180,
+ .pressure_max = 255,
+ .debounce_max = 10,
+ .debounce_tol = 5,
+ .debounce_rep = 1,
+ .get_pendown_state = ads7846_get_pendown_state,
+ .keep_vref_on = 1,
+ .settle_delay_usecs = 150,
+};
+
+static struct omap2_mcspi_device_config ads7846_mcspi_config = {
+ .turbo_mode = 0,
+ .single_channel = 1, /* 0: slave, 1: master */
+};
+
+static struct spi_board_info devkit8000_spi_board_info[] __initdata = {
+ {
+ .modalias = "ads7846",
+ .bus_num = 2,
+ .chip_select = 0,
+ .max_speed_hz = 1500000,
+ .controller_data = &ads7846_mcspi_config,
+ .irq = OMAP_GPIO_IRQ(OMAP3_DEVKIT_TS_GPIO),
+ .platform_data = &ads7846_config,
+ }
+};
+
+#define OMAP_DM9000_BASE 0x2c000000
+
+static struct resource omap_dm9000_resources[] = {
+ [0] = {
+ .start = OMAP_DM9000_BASE,
+ .end = (OMAP_DM9000_BASE + 0x4 - 1),
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = (OMAP_DM9000_BASE + 0x400),
+ .end = (OMAP_DM9000_BASE + 0x400 + 0x4 - 1),
+ .flags = IORESOURCE_MEM,
+ },
+ [2] = {
+ .start = OMAP_GPIO_IRQ(OMAP_DM9000_GPIO_IRQ),
+ .flags = IORESOURCE_IRQ | IRQF_TRIGGER_LOW,
+ },
+};
+
+static struct dm9000_plat_data omap_dm9000_platdata = {
+ .flags = DM9000_PLATF_16BITONLY,
+};
+
+static struct platform_device omap_dm9000_dev = {
+ .name = "dm9000",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(omap_dm9000_resources),
+ .resource = omap_dm9000_resources,
+ .dev = {
+ .platform_data = &omap_dm9000_platdata,
+ },
+};
+
+static void __init omap_dm9000_init(void)
+{
+ if (gpio_request(OMAP_DM9000_GPIO_IRQ, "dm9000 irq") < 0) {
+ printk(KERN_ERR "Failed to request GPIO%d for dm9000 IRQ\n",
+ OMAP_DM9000_GPIO_IRQ);
+ return;
+ }
+
+ gpio_direction_input(OMAP_DM9000_GPIO_IRQ);
+}
+
+static struct platform_device *devkit8000_devices[] __initdata = {
+ &devkit8000_dss_device,
+ &leds_gpio,
+ &keys_gpio,
+ &omap_dm9000_dev,
+};
+
+static void __init devkit8000_flash_init(void)
+{
+ u8 cs = 0;
+ u8 nandcs = GPMC_CS_NUM + 1;
+
+ u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
+
+ /* find out the chip-select on which NAND exists */
+ while (cs < GPMC_CS_NUM) {
+ u32 ret = 0;
+ ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+
+ if ((ret & 0xC00) == 0x800) {
+ printk(KERN_INFO "Found NAND on CS%d\n", cs);
+ if (nandcs > GPMC_CS_NUM)
+ nandcs = cs;
+ }
+ cs++;
+ }
+
+ if (nandcs > GPMC_CS_NUM) {
+ printk(KERN_INFO "NAND: Unable to find configuration "
+ "in GPMC\n ");
+ return;
+ }
+
+ if (nandcs < GPMC_CS_NUM) {
+ devkit8000_nand_data.cs = nandcs;
+ devkit8000_nand_data.gpmc_cs_baseaddr = (void *)
+ (gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
+ devkit8000_nand_data.gpmc_baseaddr = (void *)
+ (gpmc_base_add);
+
+ printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
+ if (platform_device_register(&devkit8000_nand_device) < 0)
+ printk(KERN_ERR "Unable to register NAND device\n");
+ }
+}
+
+static struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
+
+ .port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
+ .port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
+ .port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
+
+ .phy_reset = true,
+ .reset_gpio_port[0] = -EINVAL,
+ .reset_gpio_port[1] = 147,
+ .reset_gpio_port[2] = -EINVAL
+};
+
+static void __init devkit8000_init(void)
+{
+ devkit8000_i2c_init();
+ platform_add_devices(devkit8000_devices,
+ ARRAY_SIZE(devkit8000_devices));
+ omap_board_config = devkit8000_config;
+ omap_board_config_size = ARRAY_SIZE(devkit8000_config);
+
+ spi_register_board_info(devkit8000_spi_board_info,
+ ARRAY_SIZE(devkit8000_spi_board_info));
+
+ omap_serial_init();
+
+ omap_dm9000_init();
+
+ devkit8000_ads7846_init();
+
+ omap_mux_init_gpio(170, OMAP_PIN_INPUT);
+
+ gpio_request(170, "DVI_nPD");
+ /* REVISIT leave DVI powered down until it's needed ... */
+ gpio_direction_output(170, true);
+
+ usb_musb_init();
+ usb_ehci_init(&ehci_pdata);
+ devkit8000_flash_init();
+
+ /* Ensure SDRC pins are mux'd for self-refresh */
+ omap_mux_init_signal("sdr_cke0", OMAP_PIN_OUTPUT);
+ omap_mux_init_signal("sdr_cke1", OMAP_PIN_OUTPUT);
+}
+
+static void __init devkit8000_map_io(void)
+{
+ omap2_set_globals_343x();
+ omap34xx_map_common_io();
+}
+
+MACHINE_START(DEVKIT8000, "OMAP3 Devkit8000")
+ .phys_io = 0x48000000,
+ .io_pg_offst = ((0xd8000000) >> 18) & 0xfffc,
+ .boot_params = 0x80000100,
+ .map_io = devkit8000_map_io,
+ .init_irq = devkit8000_init_irq,
+ .init_machine = devkit8000_init,
+ .timer = &omap_timer,
+MACHINE_END
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff