// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Buffalo Terastation Pro II/Live Board Setup
*
* Maintainer: Sylver Bruneau <[email protected]>
*/
#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 "common.h"
#include "mpp.h"
#include "orion5x.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
static 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.
*/
mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
ORION_MBUS_DEVBUS_BOOT_ATTR,
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_warn("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 <[email protected]> */
.atag_offset = 0x100,
.nr_irqs = ORION5X_NR_IRQS,
.init_machine = tsp2_init,
.map_io = orion5x_map_io,
.init_early = orion5x_init_early,
.init_irq = orion5x_init_irq,
.init_time = orion5x_timer_init,
.fixup = tag_fixup_mem32,
.restart = orion5x_restart,
MACHINE_END
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