/* * Copyright (C) 2000 Deep Blue Solutions Ltd * Copyright (C) 2002 Shane Nay (shane@minirl.com) * Copyright 2005-2007 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 "devices.h" /*! * @file mx31ads.c * * @brief This file contains the board-specific initialization routines. * * @ingroup System */ #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE) /*! * The serial port definition structure. */ static struct plat_serial8250_port serial_platform_data[] = { { .membase = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA), .mapbase = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTA), .irq = EXPIO_INT_XUART_INTA, .uartclk = 14745600, .regshift = 0, .iotype = UPIO_MEM, .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ, }, { .membase = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB), .mapbase = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTB), .irq = EXPIO_INT_XUART_INTB, .uartclk = 14745600, .regshift = 0, .iotype = UPIO_MEM, .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ, }, {}, }; static struct platform_device serial_device = { .name = "serial8250", .id = 0, .dev = { .platform_data = serial_platform_data, }, }; static int __init mxc_init_extuart(void) { return platform_device_register(&serial_device); } #else static inline int mxc_init_extuart(void) { return 0; } #endif #if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE) static struct imxuart_platform_data uart_pdata = { .flags = IMXUART_HAVE_RTSCTS, }; static inline void mxc_init_imx_uart(void) { mxc_iomux_mode(MX31_PIN_CTS1__CTS1); mxc_iomux_mode(MX31_PIN_RTS1__RTS1); mxc_iomux_mode(MX31_PIN_TXD1__TXD1); mxc_iomux_mode(MX31_PIN_RXD1__RXD1); mxc_register_device(&mxc_uart_device0, &uart_pdata); } #else /* !SERIAL_IMX */ static inline void mxc_init_imx_uart(void) { } #endif /* !SERIAL_IMX */ static void mx31ads_expio_irq_handler(u32 irq, struct irq_desc *desc) { u32 imr_val; u32 int_valid; u32 expio_irq; imr_val = __raw_readw(PBC_INTMASK_SET_REG); int_valid = __raw_readw(PBC_INTSTATUS_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(u32 irq) { u32 expio = MXC_IRQ_TO_EXPIO(irq); /* mask the interrupt */ __raw_writew(1 << expio, PBC_INTMASK_CLEAR_REG); __raw_readw(PBC_INTMASK_CLEAR_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(u32 irq) { u32 expio = MXC_IRQ_TO_EXPIO(irq); /* clear the interrupt status */ __raw_writew(1 << expio, PBC_INTSTATUS_REG); } /* * 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(u32 irq) { u32 expio = MXC_IRQ_TO_EXPIO(irq); /* unmask the interrupt */ __raw_writew(1 << expio, PBC_INTMASK_SET_REG); } static struct irq_chip expio_irq_chip = { .ack = expio_ack_irq, .mask = expio_mask_irq, .unmask = expio_unmask_irq, }; static void __init mx31ads_init_expio(void) { int i; printk(KERN_INFO "MX31ADS EXPIO(CPLD) hardware\n"); /* * Configure INT line as GPIO input */ mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_4, IOMUX_CONFIG_GPIO)); /* disable the interrupt and clear the status */ __raw_writew(0xFFFF, PBC_INTMASK_CLEAR_REG); __raw_writew(0xFFFF, PBC_INTSTATUS_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_HIGH); set_irq_chained_handler(EXPIO_PARENT_INT, mx31ads_expio_irq_handler); } /*! * This structure defines static mappings for the i.MX31ADS board. */ static struct map_desc mx31ads_io_desc[] __initdata = { { .virtual = AIPS1_BASE_ADDR_VIRT, .pfn = __phys_to_pfn(AIPS1_BASE_ADDR), .length = AIPS1_SIZE, .type = MT_DEVICE_NONSHARED }, { .virtual = SPBA0_BASE_ADDR_VIRT, .pfn = __phys_to_pfn(SPBA0_BASE_ADDR), .length = SPBA0_SIZE, .type = MT_DEVICE_NONSHARED }, { .virtual = AIPS2_BASE_ADDR_VIRT, .pfn = __phys_to_pfn(AIPS2_BASE_ADDR), .length = AIPS2_SIZE, .type = MT_DEVICE_NONSHARED }, { .virtual = CS4_BASE_ADDR_VIRT, .pfn = __phys_to_pfn(CS4_BASE_ADDR), .length = CS4_SIZE / 2, .type = MT_DEVICE }, }; /*! * Set up static virtual mappings. */ static void __init mx31ads_map_io(void) { mxc_map_io(); iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc)); } static void __init mx31ads_init_irq(void) { mxc_init_irq(); mx31ads_init_expio(); } /*! * Board specific initialization. */ static void __init mxc_board_init(void) { mxc_init_extuart(); mxc_init_imx_uart(); } static void __init mx31ads_timer_init(void) { mx31_clocks_init(26000000); } static struct sys_timer mx31ads_timer = { .init = mx31ads_timer_init, }; /* * The following uses standard kernel macros defined in arch.h in order to * initialize __mach_desc_MX31ADS data structure. */ MACHINE_START(MX31ADS, "Freescale MX31ADS") /* 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 = mx31ads_map_io, .init_irq = mx31ads_init_irq, .init_machine = mxc_board_init, .timer = &mx31ads_timer, MACHINE_END