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alistair23-linux/arch/arm/mach-orion5x/db88f5281-setup.c
Lennert Buytenhek 044f6c7c44 [ARM] Orion: move EHCI/I2C/UART peripheral init into board code 
This patch moves initialisation of EHCI/I2C/UART platform devices
from the common orion5x_init() into the board support code.

The rationale behind this is that only the board support code knows
whether certain peripherals have been brought out on the board, and
not initialising peripherals that haven't been brought out is
desirable for example:
- to reduce user confusion (e.g. seeing both 'eth0' and 'eth1'
  appear while there is only one ethernet port on the board); and
- to allow for future power savings (peripherals that have not
  been brought out can be clock gated off entirely).

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Russell King <linux@arm.linux.org.uk>
2008-06-22 22:44:45 +02:00

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/*
* arch/arm/mach-orion5x/db88f5281-setup.c
*
* Marvell Orion-2 Development Board Setup
*
* Maintainer: Tzachi Perelstein <tzachi@marvell.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/nand.h>
#include <linux/timer.h>
#include <linux/mv643xx_eth.h>
#include <linux/i2c.h>
#include <asm/mach-types.h>
#include <asm/gpio.h>
#include <asm/mach/arch.h>
#include <asm/mach/pci.h>
#include <asm/arch/orion5x.h>
#include <asm/plat-orion/orion_nand.h>
#include "common.h"
/*****************************************************************************
* DB-88F5281 on board devices
****************************************************************************/
/*
* 512K NOR flash Device bus boot chip select
*/
#define DB88F5281_NOR_BOOT_BASE 0xf4000000
#define DB88F5281_NOR_BOOT_SIZE SZ_512K
/*
* 7-Segment on Device bus chip select 0
*/
#define DB88F5281_7SEG_BASE 0xfa000000
#define DB88F5281_7SEG_SIZE SZ_1K
/*
* 32M NOR flash on Device bus chip select 1
*/
#define DB88F5281_NOR_BASE 0xfc000000
#define DB88F5281_NOR_SIZE SZ_32M
/*
* 32M NAND flash on Device bus chip select 2
*/
#define DB88F5281_NAND_BASE 0xfa800000
#define DB88F5281_NAND_SIZE SZ_1K
/*
* PCI
*/
#define DB88F5281_PCI_SLOT0_OFFS 7
#define DB88F5281_PCI_SLOT0_IRQ_PIN 12
#define DB88F5281_PCI_SLOT1_SLOT2_IRQ_PIN 13
/*****************************************************************************
* 512M NOR Flash on Device bus Boot CS
****************************************************************************/
static struct physmap_flash_data db88f5281_boot_flash_data = {
.width = 1, /* 8 bit bus width */
};
static struct resource db88f5281_boot_flash_resource = {
.flags = IORESOURCE_MEM,
.start = DB88F5281_NOR_BOOT_BASE,
.end = DB88F5281_NOR_BOOT_BASE + DB88F5281_NOR_BOOT_SIZE - 1,
};
static struct platform_device db88f5281_boot_flash = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &db88f5281_boot_flash_data,
},
.num_resources = 1,
.resource = &db88f5281_boot_flash_resource,
};
/*****************************************************************************
* 32M NOR Flash on Device bus CS1
****************************************************************************/
static struct physmap_flash_data db88f5281_nor_flash_data = {
.width = 4, /* 32 bit bus width */
};
static struct resource db88f5281_nor_flash_resource = {
.flags = IORESOURCE_MEM,
.start = DB88F5281_NOR_BASE,
.end = DB88F5281_NOR_BASE + DB88F5281_NOR_SIZE - 1,
};
static struct platform_device db88f5281_nor_flash = {
.name = "physmap-flash",
.id = 1,
.dev = {
.platform_data = &db88f5281_nor_flash_data,
},
.num_resources = 1,
.resource = &db88f5281_nor_flash_resource,
};
/*****************************************************************************
* 32M NAND Flash on Device bus CS2
****************************************************************************/
static struct mtd_partition db88f5281_nand_parts[] = {
{
.name = "kernel",
.offset = 0,
.size = SZ_2M,
}, {
.name = "root",
.offset = SZ_2M,
.size = (SZ_16M - SZ_2M),
}, {
.name = "user",
.offset = SZ_16M,
.size = SZ_8M,
}, {
.name = "recovery",
.offset = (SZ_16M + SZ_8M),
.size = SZ_8M,
},
};
static struct resource db88f5281_nand_resource = {
.flags = IORESOURCE_MEM,
.start = DB88F5281_NAND_BASE,
.end = DB88F5281_NAND_BASE + DB88F5281_NAND_SIZE - 1,
};
static struct orion_nand_data db88f5281_nand_data = {
.parts = db88f5281_nand_parts,
.nr_parts = ARRAY_SIZE(db88f5281_nand_parts),
.cle = 0,
.ale = 1,
.width = 8,
};
static struct platform_device db88f5281_nand_flash = {
.name = "orion_nand",
.id = -1,
.dev = {
.platform_data = &db88f5281_nand_data,
},
.resource = &db88f5281_nand_resource,
.num_resources = 1,
};
/*****************************************************************************
* 7-Segment on Device bus CS0
* Dummy counter every 2 sec
****************************************************************************/
static void __iomem *db88f5281_7seg;
static struct timer_list db88f5281_timer;
static void db88f5281_7seg_event(unsigned long data)
{
static int count = 0;
writel(0, db88f5281_7seg + (count << 4));
count = (count + 1) & 7;
mod_timer(&db88f5281_timer, jiffies + 2 * HZ);
}
static int __init db88f5281_7seg_init(void)
{
if (machine_is_db88f5281()) {
db88f5281_7seg = ioremap(DB88F5281_7SEG_BASE,
DB88F5281_7SEG_SIZE);
if (!db88f5281_7seg) {
printk(KERN_ERR "Failed to ioremap db88f5281_7seg\n");
return -EIO;
}
setup_timer(&db88f5281_timer, db88f5281_7seg_event, 0);
mod_timer(&db88f5281_timer, jiffies + 2 * HZ);
}
return 0;
}
__initcall(db88f5281_7seg_init);
/*****************************************************************************
* PCI
****************************************************************************/
void __init db88f5281_pci_preinit(void)
{
int pin;
/*
* Configure PCI GPIO IRQ pins
*/
pin = DB88F5281_PCI_SLOT0_IRQ_PIN;
if (gpio_request(pin, "PCI Int1") == 0) {
if (gpio_direction_input(pin) == 0) {
set_irq_type(gpio_to_irq(pin), IRQT_LOW);
} else {
printk(KERN_ERR "db88f5281_pci_preinit faield to "
"set_irq_type pin %d\n", pin);
gpio_free(pin);
}
} else {
printk(KERN_ERR "db88f5281_pci_preinit failed to gpio_request %d\n", pin);
}
pin = DB88F5281_PCI_SLOT1_SLOT2_IRQ_PIN;
if (gpio_request(pin, "PCI Int2") == 0) {
if (gpio_direction_input(pin) == 0) {
set_irq_type(gpio_to_irq(pin), IRQT_LOW);
} else {
printk(KERN_ERR "db88f5281_pci_preinit faield "
"to set_irq_type pin %d\n", pin);
gpio_free(pin);
}
} else {
printk(KERN_ERR "db88f5281_pci_preinit failed to gpio_request %d\n", pin);
}
}
static int __init db88f5281_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
int irq;
/*
* Check for devices with hard-wired IRQs.
*/
irq = orion5x_pci_map_irq(dev, slot, pin);
if (irq != -1)
return irq;
/*
* PCI IRQs are connected via GPIOs.
*/
switch (slot - DB88F5281_PCI_SLOT0_OFFS) {
case 0:
return gpio_to_irq(DB88F5281_PCI_SLOT0_IRQ_PIN);
case 1:
case 2:
return gpio_to_irq(DB88F5281_PCI_SLOT1_SLOT2_IRQ_PIN);
default:
return -1;
}
}
static struct hw_pci db88f5281_pci __initdata = {
.nr_controllers = 2,
.preinit = db88f5281_pci_preinit,
.swizzle = pci_std_swizzle,
.setup = orion5x_pci_sys_setup,
.scan = orion5x_pci_sys_scan_bus,
.map_irq = db88f5281_pci_map_irq,
};
static int __init db88f5281_pci_init(void)
{
if (machine_is_db88f5281())
pci_common_init(&db88f5281_pci);
return 0;
}
subsys_initcall(db88f5281_pci_init);
/*****************************************************************************
* Ethernet
****************************************************************************/
static struct mv643xx_eth_platform_data db88f5281_eth_data = {
.phy_addr = 8,
.force_phy_addr = 1,
};
/*****************************************************************************
* RTC DS1339 on I2C bus
****************************************************************************/
static struct i2c_board_info __initdata db88f5281_i2c_rtc = {
I2C_BOARD_INFO("ds1339", 0x68),
};
/*****************************************************************************
* General Setup
****************************************************************************/
static void __init db88f5281_init(void)
{
/*
* Basic Orion setup. Need to be called early.
*/
orion5x_init();
/*
* Setup Multiplexing Pins:
* MPP0: GPIO (USB Over Current) MPP1: GPIO (USB Vbat input)
* MPP2: PCI_REQn[2] MPP3: PCI_GNTn[2]
* MPP4: PCI_REQn[3] MPP5: PCI_GNTn[3]
* MPP6: GPIO (JP0, CON17.2) MPP7: GPIO (JP1, CON17.1)
* MPP8: GPIO (JP2, CON11.2) MPP9: GPIO (JP3, CON11.3)
* MPP10: GPIO (RTC int) MPP11: GPIO (Baud Rate Generator)
* MPP12: GPIO (PCI int 1) MPP13: GPIO (PCI int 2)
* MPP14: NAND_REn[2] MPP15: NAND_WEn[2]
* MPP16: UART1_RX MPP17: UART1_TX
* MPP18: UART1_CTS MPP19: UART1_RTS
* MPP-DEV: DEV_D[16:31]
*/
orion5x_write(MPP_0_7_CTRL, 0x00222203);
orion5x_write(MPP_8_15_CTRL, 0x44000000);
orion5x_write(MPP_16_19_CTRL, 0);
orion5x_write(MPP_DEV_CTRL, 0);
orion5x_gpio_set_valid_pins(0x00003fc3);
/*
* Configure peripherals.
*/
orion5x_ehci0_init();
orion5x_eth_init(&db88f5281_eth_data);
orion5x_i2c_init();
orion5x_uart0_init();
orion5x_uart1_init();
orion5x_setup_dev_boot_win(DB88F5281_NOR_BOOT_BASE,
DB88F5281_NOR_BOOT_SIZE);
platform_device_register(&db88f5281_boot_flash);
orion5x_setup_dev0_win(DB88F5281_7SEG_BASE, DB88F5281_7SEG_SIZE);
orion5x_setup_dev1_win(DB88F5281_NOR_BASE, DB88F5281_NOR_SIZE);
platform_device_register(&db88f5281_nor_flash);
orion5x_setup_dev2_win(DB88F5281_NAND_BASE, DB88F5281_NAND_SIZE);
platform_device_register(&db88f5281_nand_flash);
i2c_register_board_info(0, &db88f5281_i2c_rtc, 1);
}
MACHINE_START(DB88F5281, "Marvell Orion-2 Development Board")
/* Maintainer: Tzachi Perelstein <tzachi@marvell.com> */
.phys_io = ORION5X_REGS_PHYS_BASE,
.io_pg_offst = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.init_machine = db88f5281_init,
.map_io = orion5x_map_io,
.init_irq = orion5x_init_irq,
.timer = &orion5x_timer,
MACHINE_END
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