272 lines
6.8 KiB
C
272 lines
6.8 KiB
C
|
/*
|
||
|
|
* 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 <linux/types.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/clk.h>
|
||
|
|
#include <linux/irq.h>
|
||
|
|
#include <linux/gpio.h>
|
||
|
|
#include <linux/smsc911x.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
|
||
|
|
#include <mach/hardware.h>
|
||
|
|
#include <asm/mach-types.h>
|
||
|
|
#include <asm/mach/arch.h>
|
||
|
|
#include <asm/mach/time.h>
|
||
|
|
#include <asm/memory.h>
|
||
|
|
#include <asm/mach/map.h>
|
||
|
|
#include <mach/common.h>
|
||
|
|
#include <mach/board-mx31pdk.h>
|
||
|
|
#include <mach/imx-uart.h>
|
||
|
|
#include <mach/iomux-mx3.h>
|
||
|
|
#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
|