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alistair23-linux/arch/arm/mach-orion5x/terastation_pro2-setup.c
Russell King daeb4c0c3b ARM: PCI: get rid of pci_std_swizzle() 
Most PCI implementations use the standard PCI swizzle function, which
handles the well defined behaviour of PCI-to-PCI bridges which can be
found on cards (eg, four port ethernet cards.)

Rather than having almost every platform specify the standard swizzle
function, make this the default when no swizzle function is supplied.
Therefore, a swizzle function only needs to be provided when there is
something exceptional which needs to be handled.

This gets rid of the swizzle initializer from 47 files, and leaves us
with just two platforms specifying a swizzle function: ARM Integrator
and Chalice CATS.

Acked-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-05-13 17:12:16 +01:00

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/*
* Buffalo Terastation Pro II/Live Board Setup
*
* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.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.
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/mtd/physmap.h>
#include <linux/mv643xx_eth.h>
#include <linux/i2c.h>
#include <linux/serial_reg.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/pci.h>
#include <mach/orion5x.h>
#include "common.h"
#include "mpp.h"
/*****************************************************************************
* Terastation Pro 2/Live Info
****************************************************************************/
/*
* Terastation Pro 2 hardware :
* - Marvell 88F5281-D0
* - Marvell 88SX6042 SATA controller (PCI)
* - Marvell 88E1118 Gigabit Ethernet PHY
* - 256KB NOR flash
* - 128MB of DDR RAM
* - PCIe port (not equipped)
*/
/*
* 256K NOR flash Device bus boot chip select
*/
#define TSP2_NOR_BOOT_BASE 0xf4000000
#define TSP2_NOR_BOOT_SIZE SZ_256K
/*****************************************************************************
* 256KB NOR Flash on BOOT Device
****************************************************************************/
static struct physmap_flash_data tsp2_nor_flash_data = {
.width = 1,
};
static struct resource tsp2_nor_flash_resource = {
.flags = IORESOURCE_MEM,
.start = TSP2_NOR_BOOT_BASE,
.end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
};
static struct platform_device tsp2_nor_flash = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &tsp2_nor_flash_data,
},
.num_resources = 1,
.resource = &tsp2_nor_flash_resource,
};
/*****************************************************************************
* PCI
****************************************************************************/
#define TSP2_PCI_SLOT0_OFFS 7
#define TSP2_PCI_SLOT0_IRQ_PIN 11
void __init tsp2_pci_preinit(void)
{
int pin;
/*
* Configure PCI GPIO IRQ pins
*/
pin = TSP2_PCI_SLOT0_IRQ_PIN;
if (gpio_request(pin, "PCI Int1") == 0) {
if (gpio_direction_input(pin) == 0) {
irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
} else {
printk(KERN_ERR "tsp2_pci_preinit failed "
"to set_irq_type pin %d\n", pin);
gpio_free(pin);
}
} else {
printk(KERN_ERR "tsp2_pci_preinit failed to "
"gpio_request %d\n", pin);
}
}
static int __init tsp2_pci_map_irq(const 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.
*/
if (slot == TSP2_PCI_SLOT0_OFFS)
return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);
return -1;
}
static struct hw_pci tsp2_pci __initdata = {
.nr_controllers = 2,
.preinit = tsp2_pci_preinit,
.setup = orion5x_pci_sys_setup,
.scan = orion5x_pci_sys_scan_bus,
.map_irq = tsp2_pci_map_irq,
};
static int __init tsp2_pci_init(void)
{
if (machine_is_terastation_pro2())
pci_common_init(&tsp2_pci);
return 0;
}
subsys_initcall(tsp2_pci_init);
/*****************************************************************************
* Ethernet
****************************************************************************/
static struct mv643xx_eth_platform_data tsp2_eth_data = {
.phy_addr = 0,
};
/*****************************************************************************
* RTC 5C372a on I2C bus
****************************************************************************/
#define TSP2_RTC_GPIO 9
static struct i2c_board_info __initdata tsp2_i2c_rtc = {
I2C_BOARD_INFO("rs5c372a", 0x32),
};
/*****************************************************************************
* Terastation Pro II specific power off method via UART1-attached
* microcontroller
****************************************************************************/
#define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2))
static int tsp2_miconread(unsigned char *buf, int count)
{
int i;
int timeout;
for (i = 0; i < count; i++) {
timeout = 10;
while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
if (--timeout == 0)
break;
udelay(1000);
}
if (timeout == 0)
break;
buf[i] = readl(UART1_REG(RX));
}
/* return read bytes */
return i;
}
static int tsp2_miconwrite(const unsigned char *buf, int count)
{
int i = 0;
while (count--) {
while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
barrier();
writel(buf[i++], UART1_REG(TX));
}
return 0;
}
static int tsp2_miconsend(const unsigned char *data, int count)
{
int i;
unsigned char checksum = 0;
unsigned char recv_buf[40];
unsigned char send_buf[40];
unsigned char correct_ack[3];
int retry = 2;
/* Generate checksum */
for (i = 0; i < count; i++)
checksum -= data[i];
do {
/* Send data */
tsp2_miconwrite(data, count);
/* send checksum */
tsp2_miconwrite(&checksum, 1);
if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
printk(KERN_ERR ">%s: receive failed.\n", __func__);
/* send preamble to clear the receive buffer */
memset(&send_buf, 0xff, sizeof(send_buf));
tsp2_miconwrite(send_buf, sizeof(send_buf));
/* make dummy reads */
mdelay(100);
tsp2_miconread(recv_buf, sizeof(recv_buf));
} else {
/* Generate expected ack */
correct_ack[0] = 0x01;
correct_ack[1] = data[1];
correct_ack[2] = 0x00;
/* checksum Check */
if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
recv_buf[3]) & 0xFF) {
printk(KERN_ERR ">%s: Checksum Error : "
"Received data[%02x, %02x, %02x, %02x]"
"\n", __func__, recv_buf[0],
recv_buf[1], recv_buf[2], recv_buf[3]);
} else {
/* Check Received Data */
if (correct_ack[0] == recv_buf[0] &&
correct_ack[1] == recv_buf[1] &&
correct_ack[2] == recv_buf[2]) {
/* Interval for next command */
mdelay(10);
/* Receive ACK */
return 0;
}
}
/* Received NAK or illegal Data */
printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
"Received\n", __func__);
}
} while (retry--);
/* Interval for next command */
mdelay(10);
return -1;
}
static void tsp2_power_off(void)
{
const unsigned char watchdogkill[] = {0x01, 0x35, 0x00};
const unsigned char shutdownwait[] = {0x00, 0x0c};
const unsigned char poweroff[] = {0x00, 0x06};
/* 38400 baud divisor */
const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
pr_info("%s: triggering power-off...\n", __func__);
/* hijack uart1 and reset into sane state (38400,8n1,even parity) */
writel(0x83, UART1_REG(LCR));
writel(divisor & 0xff, UART1_REG(DLL));
writel((divisor >> 8) & 0xff, UART1_REG(DLM));
writel(0x1b, UART1_REG(LCR));
writel(0x00, UART1_REG(IER));
writel(0x07, UART1_REG(FCR));
writel(0x00, UART1_REG(MCR));
/* Send the commands to shutdown the Terastation Pro II */
tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
tsp2_miconsend(poweroff, sizeof(poweroff));
}
/*****************************************************************************
* General Setup
****************************************************************************/
static unsigned int tsp2_mpp_modes[] __initdata = {
MPP0_PCIE_RST_OUTn,
MPP1_UNUSED,
MPP2_UNUSED,
MPP3_UNUSED,
MPP4_NAND, /* BOOT NAND Flash REn */
MPP5_NAND, /* BOOT NAND Flash WEn */
MPP6_NAND, /* BOOT NAND Flash HREn[0] */
MPP7_NAND, /* BOOT NAND Flash WEn[0] */
MPP8_GPIO, /* MICON int */
MPP9_GPIO, /* RTC int */
MPP10_UNUSED,
MPP11_GPIO, /* PCI Int A */
MPP12_UNUSED,
MPP13_GPIO, /* UPS on UART0 enable */
MPP14_GPIO, /* UPS low battery detection */
MPP15_UNUSED,
MPP16_UART, /* UART1 RXD */
MPP17_UART, /* UART1 TXD */
MPP18_UART, /* UART1 CTSn */
MPP19_UART, /* UART1 RTSn */
0,
};
static void __init tsp2_init(void)
{
/*
* Setup basic Orion functions. Need to be called early.
*/
orion5x_init();
orion5x_mpp_conf(tsp2_mpp_modes);
/*
* Configure peripherals.
*/
orion5x_setup_dev_boot_win(TSP2_NOR_BOOT_BASE,
TSP2_NOR_BOOT_SIZE);
platform_device_register(&tsp2_nor_flash);
orion5x_ehci0_init();
orion5x_eth_init(&tsp2_eth_data);
orion5x_i2c_init();
orion5x_uart0_init();
orion5x_uart1_init();
/* Get RTC IRQ and register the chip */
if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
else
gpio_free(TSP2_RTC_GPIO);
}
if (tsp2_i2c_rtc.irq == 0)
pr_warning("tsp2_init: failed to get RTC IRQ\n");
i2c_register_board_info(0, &tsp2_i2c_rtc, 1);
/* register Terastation Pro II specific power-off method */
pm_power_off = tsp2_power_off;
}
MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
/* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */
.atag_offset = 0x100,
.init_machine = tsp2_init,
.map_io = orion5x_map_io,
.init_early = orion5x_init_early,
.init_irq = orion5x_init_irq,
.timer = &orion5x_timer,
.fixup = tag_fixup_mem32,
.restart = orion5x_restart,
MACHINE_END
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