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linux/arch/arm/mach-mx3/qong.c
Ilya Yanok 148854c65e qong: basic support for Dave/DENX QongEVB-LITE board 
This patch adds basic support for Dave/DENX QongEVB-LITE i.MX31-based
board. It includes support for clocks initialization, UART1, NOR-flash,
FPGA-attached NAND flash and DNET ethernet controller (inside FPGA).

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-03-13 10:35:05 +01:00

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/*
* Copyright (C) 2009 Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
*
* 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/kernel.h>
#include <linux/memory.h>
#include <linux/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/nand.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/mach/map.h>
#include <mach/common.h>
#include <asm/page.h>
#include <asm/setup.h>
#include <mach/board-qong.h>
#include <mach/imx-uart.h>
#include <mach/iomux-mx3.h>
#include "devices.h"
/* FPGA defines */
#define QONG_FPGA_VERSION(major, minor, rev) \
(((major & 0xF) << 12) | ((minor & 0xF) << 8) | (rev & 0xFF))
#define QONG_FPGA_BASEADDR CS1_BASE_ADDR
#define QONG_FPGA_PERIPH_SIZE (1 << 24)
#define QONG_FPGA_CTRL_BASEADDR QONG_FPGA_BASEADDR
#define QONG_FPGA_CTRL_SIZE 0x10
/* FPGA control registers */
#define QONG_FPGA_CTRL_VERSION 0x00
#define QONG_DNET_ID 1
#define QONG_DNET_BASEADDR \
(QONG_FPGA_BASEADDR + QONG_DNET_ID * QONG_FPGA_PERIPH_SIZE)
#define QONG_DNET_SIZE 0x00001000
#define QONG_FPGA_IRQ IOMUX_TO_IRQ(MX31_PIN_DTR_DCE1)
/*
* This file contains the board-specific initialization routines.
*/
static struct imxuart_platform_data uart_pdata = {
.flags = IMXUART_HAVE_RTSCTS,
};
static int uart_pins[] = {
MX31_PIN_CTS1__CTS1,
MX31_PIN_RTS1__RTS1,
MX31_PIN_TXD1__TXD1,
MX31_PIN_RXD1__RXD1
};
static inline void mxc_init_imx_uart(void)
{
mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
"uart-0");
mxc_register_device(&mxc_uart_device0, &uart_pdata);
}
static struct resource dnet_resources[] = {
[0] = {
.name = "dnet-memory",
.start = QONG_DNET_BASEADDR,
.end = QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = QONG_FPGA_IRQ,
.end = QONG_FPGA_IRQ,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device dnet_device = {
.name = "dnet",
.id = -1,
.num_resources = ARRAY_SIZE(dnet_resources),
.resource = dnet_resources,
};
static int __init qong_init_dnet(void)
{
int ret;
ret = platform_device_register(&dnet_device);
return ret;
}
/* MTD NOR flash */
static struct physmap_flash_data qong_flash_data = {
.width = 2,
};
static struct resource qong_flash_resource = {
.start = CS0_BASE_ADDR,
.end = CS0_BASE_ADDR + QONG_NOR_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device qong_nor_mtd_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &qong_flash_data,
},
.resource = &qong_flash_resource,
.num_resources = 1,
};
static void qong_init_nor_mtd(void)
{
(void)platform_device_register(&qong_nor_mtd_device);
}
/*
* Hardware specific access to control-lines
*/
static void qong_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct nand_chip *nand_chip = mtd->priv;
if (cmd == NAND_CMD_NONE)
return;
if (ctrl & NAND_CLE)
writeb(cmd, nand_chip->IO_ADDR_W + (1 << 24));
else
writeb(cmd, nand_chip->IO_ADDR_W + (1 << 23));
}
/*
* Read the Device Ready pin.
*/
static int qong_nand_device_ready(struct mtd_info *mtd)
{
return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_NFRB));
}
static void qong_nand_select_chip(struct mtd_info *mtd, int chip)
{
if (chip >= 0)
gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
else
gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 1);
}
static struct platform_nand_data qong_nand_data = {
.chip = {
.chip_delay = 20,
.options = 0,
},
.ctrl = {
.cmd_ctrl = qong_nand_cmd_ctrl,
.dev_ready = qong_nand_device_ready,
.select_chip = qong_nand_select_chip,
}
};
static struct resource qong_nand_resource = {
.start = CS3_BASE_ADDR,
.end = CS3_BASE_ADDR + SZ_32M - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device qong_nand_device = {
.name = "gen_nand",
.id = -1,
.dev = {
.platform_data = &qong_nand_data,
},
.num_resources = 1,
.resource = &qong_nand_resource,
};
static void __init qong_init_nand_mtd(void)
{
/* init CS */
__raw_writel(0x00004f00, CSCR_U(3));
__raw_writel(0x20013b31, CSCR_L(3));
__raw_writel(0x00020800, CSCR_A(3));
mxc_iomux_set_gpr(MUX_SDCTL_CSD1_SEL, true);
/* enable pin */
mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFCE_B, IOMUX_CONFIG_GPIO));
if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), "nand_enable"))
gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
/* ready/busy pin */
mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFRB, IOMUX_CONFIG_GPIO));
if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFRB), "nand_rdy"))
gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFRB));
/* write protect pin */
mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFWP_B, IOMUX_CONFIG_GPIO));
if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFWP_B), "nand_wp"))
gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFWP_B));
platform_device_register(&qong_nand_device);
}
static void __init qong_init_fpga(void)
{
void __iomem *regs;
u32 fpga_ver;
regs = ioremap(QONG_FPGA_CTRL_BASEADDR, QONG_FPGA_CTRL_SIZE);
if (!regs) {
printk(KERN_ERR "%s: failed to map registers, aborting.\n",
__func__);
return;
}
fpga_ver = readl(regs + QONG_FPGA_CTRL_VERSION);
iounmap(regs);
printk(KERN_INFO "Qong FPGA version %d.%d.%d\n",
(fpga_ver & 0xF000) >> 12,
(fpga_ver & 0x0F00) >> 8, fpga_ver & 0x00FF);
if (fpga_ver < QONG_FPGA_VERSION(0, 8, 7)) {
printk(KERN_ERR "qong: Unexpected FPGA version, FPGA-based "
"devices won't be registered!\n");
return;
}
/* register FPGA-based devices */
qong_init_nand_mtd();
qong_init_dnet();
}
/*
* This structure defines the MX31 memory map.
*/
static struct map_desc qong_io_desc[] __initdata = {
{
.virtual = AIPS1_BASE_ADDR_VIRT,
.pfn = __phys_to_pfn(AIPS1_BASE_ADDR),
.length = AIPS1_SIZE,
.type = MT_DEVICE_NONSHARED
}, {
.virtual = AIPS2_BASE_ADDR_VIRT,
.pfn = __phys_to_pfn(AIPS2_BASE_ADDR),
.length = AIPS2_SIZE,
.type = MT_DEVICE_NONSHARED
}
};
/*
* Set up static virtual mappings.
*/
static void __init qong_map_io(void)
{
mxc_map_io();
iotable_init(qong_io_desc, ARRAY_SIZE(qong_io_desc));
}
/*
* Board specific initialization.
*/
static void __init mxc_board_init(void)
{
mxc_init_imx_uart();
qong_init_nor_mtd();
qong_init_fpga();
}
static void __init qong_timer_init(void)
{
mx31_clocks_init(26000000);
}
static struct sys_timer qong_timer = {
.init = qong_timer_init,
};
/*
* The following uses standard kernel macros defined in arch.h in order to
* initialize __mach_desc_QONG data structure.
*/
MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
/* Maintainer: DENX Software Engineering GmbH */
.phys_io = AIPS1_BASE_ADDR,
.io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
.boot_params = PHYS_OFFSET + 0x100,
.map_io = qong_map_io,
.init_irq = mxc_init_irq,
.init_machine = mxc_board_init,
.timer = &qong_timer,
MACHINE_END
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