/* * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "devices.h" /*! * @file mx31pdk.c * * @brief This file contains the board-specific initialization routines. * * @ingroup System */ static int mx31pdk_pins[] = { /* UART1 */ MX31_PIN_CTS1__CTS1, MX31_PIN_RTS1__RTS1, MX31_PIN_TXD1__TXD1, MX31_PIN_RXD1__RXD1, IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO), }; static struct imxuart_platform_data uart_pdata = { .flags = IMXUART_HAVE_RTSCTS, }; /* * Support for the SMSC9217 on the Debug board. */ static struct smsc911x_platform_config smsc911x_config = { .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW, .irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL, .flags = SMSC911X_USE_16BIT | SMSC911X_FORCE_INTERNAL_PHY, .phy_interface = PHY_INTERFACE_MODE_MII, }; static struct resource smsc911x_resources[] = { { .start = LAN9217_BASE_ADDR, .end = LAN9217_BASE_ADDR + 0xff, .flags = IORESOURCE_MEM, }, { .start = EXPIO_INT_ENET, .end = EXPIO_INT_ENET, .flags = IORESOURCE_IRQ, }, }; static struct platform_device smsc911x_device = { .name = "smsc911x", .id = -1, .num_resources = ARRAY_SIZE(smsc911x_resources), .resource = smsc911x_resources, .dev = { .platform_data = &smsc911x_config, }, }; /* * Routines for the CPLD on the debug board. It contains a CPLD handling * LEDs, switches, interrupts for Ethernet. */ static void mx31pdk_expio_irq_handler(uint32_t irq, struct irq_desc *desc) { uint32_t imr_val; uint32_t int_valid; uint32_t expio_irq; imr_val = __raw_readw(CPLD_INT_MASK_REG); int_valid = __raw_readw(CPLD_INT_STATUS_REG) & ~imr_val; expio_irq = MXC_EXP_IO_BASE; for (; int_valid != 0; int_valid >>= 1, expio_irq++) { if ((int_valid & 1) == 0) continue; generic_handle_irq(expio_irq); } } /* * Disable an expio pin's interrupt by setting the bit in the imr. * @param irq an expio virtual irq number */ static void expio_mask_irq(uint32_t irq) { uint16_t reg; uint32_t expio = MXC_IRQ_TO_EXPIO(irq); /* mask the interrupt */ reg = __raw_readw(CPLD_INT_MASK_REG); reg |= 1 << expio; __raw_writew(reg, CPLD_INT_MASK_REG); } /* * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr. * @param irq an expanded io virtual irq number */ static void expio_ack_irq(uint32_t irq) { uint32_t expio = MXC_IRQ_TO_EXPIO(irq); /* clear the interrupt status */ __raw_writew(1 << expio, CPLD_INT_RESET_REG); __raw_writew(0, CPLD_INT_RESET_REG); /* mask the interrupt */ expio_mask_irq(irq); } /* * Enable a expio pin's interrupt by clearing the bit in the imr. * @param irq a expio virtual irq number */ static void expio_unmask_irq(uint32_t irq) { uint16_t reg; uint32_t expio = MXC_IRQ_TO_EXPIO(irq); /* unmask the interrupt */ reg = __raw_readw(CPLD_INT_MASK_REG); reg &= ~(1 << expio); __raw_writew(reg, CPLD_INT_MASK_REG); } static struct irq_chip expio_irq_chip = { .ack = expio_ack_irq, .mask = expio_mask_irq, .unmask = expio_unmask_irq, }; static int __init mx31pdk_init_expio(void) { int i; int ret; /* Check if there's a debug board connected */ if ((__raw_readw(CPLD_MAGIC_NUMBER1_REG) != 0xAAAA) || (__raw_readw(CPLD_MAGIC_NUMBER2_REG) != 0x5555) || (__raw_readw(CPLD_MAGIC_NUMBER3_REG) != 0xCAFE)) { /* No Debug board found */ return -ENODEV; } pr_info("i.MX31PDK Debug board detected, rev = 0x%04X\n", __raw_readw(CPLD_CODE_VER_REG)); /* * Configure INT line as GPIO input */ ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "sms9217-irq"); if (ret) pr_warning("could not get LAN irq gpio\n"); else gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1)); /* Disable the interrupts and clear the status */ __raw_writew(0, CPLD_INT_MASK_REG); __raw_writew(0xFFFF, CPLD_INT_RESET_REG); __raw_writew(0, CPLD_INT_RESET_REG); __raw_writew(0x1F, CPLD_INT_MASK_REG); for (i = MXC_EXP_IO_BASE; i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES); i++) { set_irq_chip(i, &expio_irq_chip); set_irq_handler(i, handle_level_irq); set_irq_flags(i, IRQF_VALID); } set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_LOW); set_irq_chained_handler(EXPIO_PARENT_INT, mx31pdk_expio_irq_handler); return 0; } /* * This structure defines the MX31 memory map. */ static struct map_desc mx31pdk_io_desc[] __initdata = { { .virtual = SPBA0_BASE_ADDR_VIRT, .pfn = __phys_to_pfn(SPBA0_BASE_ADDR), .length = SPBA0_SIZE, .type = MT_DEVICE_NONSHARED, }, { .virtual = CS5_BASE_ADDR_VIRT, .pfn = __phys_to_pfn(CS5_BASE_ADDR), .length = CS5_SIZE, .type = MT_DEVICE, }, }; /* * Set up static virtual mappings. */ static void __init mx31pdk_map_io(void) { mx31_map_io(); iotable_init(mx31pdk_io_desc, ARRAY_SIZE(mx31pdk_io_desc)); } /*! * Board specific initialization. */ static void __init mxc_board_init(void) { mxc_iomux_setup_multiple_pins(mx31pdk_pins, ARRAY_SIZE(mx31pdk_pins), "mx31pdk"); mxc_register_device(&mxc_uart_device0, &uart_pdata); if (!mx31pdk_init_expio()) platform_device_register(&smsc911x_device); } static void __init mx31pdk_timer_init(void) { mx31_clocks_init(26000000); } static struct sys_timer mx31pdk_timer = { .init = mx31pdk_timer_init, }; /* * The following uses standard kernel macros defined in arch.h in order to * initialize __mach_desc_MX31PDK data structure. */ MACHINE_START(MX31_3DS, "Freescale MX31PDK (3DS)") /* Maintainer: Freescale Semiconductor, Inc. */ .phys_io = AIPS1_BASE_ADDR, .io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc, .boot_params = PHYS_OFFSET + 0x100, .map_io = mx31pdk_map_io, .init_irq = mx31_init_irq, .init_machine = mxc_board_init, .timer = &mx31pdk_timer, MACHINE_END