[ARM] Orion: add Buffalo Terastation Pro II/Live support

This patch adds support for the Buffalo Terastation Pro II/Live.

Signed-off-by: Sylver Bruneau <sylver.bruneau@googlemail.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

3 files changed, 376 insertions, 0 deletions

diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
index ff405c47490..c738f450f93 100644
--- a/arch/arm/mach-orion5x/Kconfig
+++ b/arch/arm/mach-orion5x/Kconfig
@@ -36,6 +36,12 @@ config MACH_TS209
 	  Say 'Y' here if you want your kernel to support the
 	  QNAP TS-109/TS-209 platform.
 
+config MACH_TERASTATION_PRO2
+	bool "Buffalo Terastation Pro II/Live"
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Buffalo Terastation Pro II/Live platform.
+
 config MACH_LINKSTATION_PRO
 	bool "Buffalo Linkstation Pro/Live"
 	select I2C_BOARDINFO
diff --git a/arch/arm/mach-orion5x/Makefile b/arch/arm/mach-orion5x/Makefile
index b6da94bdb3f..39e41a6b61e 100644
--- a/arch/arm/mach-orion5x/Makefile
+++ b/arch/arm/mach-orion5x/Makefile
@@ -2,6 +2,7 @@ obj-y				+= common.o addr-map.o pci.o gpio.o irq.o mpp.o
 obj-$(CONFIG_MACH_DB88F5281)	+= db88f5281-setup.o
 obj-$(CONFIG_MACH_RD88F5182)	+= rd88f5182-setup.o
 obj-$(CONFIG_MACH_KUROBOX_PRO)	+= kurobox_pro-setup.o
+obj-$(CONFIG_MACH_TERASTATION_PRO2)	+= terastation_pro2-setup.o
 obj-$(CONFIG_MACH_LINKSTATION_PRO) += kurobox_pro-setup.o
 obj-$(CONFIG_MACH_DNS323)	+= dns323-setup.o
 obj-$(CONFIG_MACH_TS209)	+= ts209-setup.o tsx09-common.o
diff --git a/arch/arm/mach-orion5x/terastation_pro2-setup.c b/arch/arm/mach-orion5x/terastation_pro2-setup.c
new file mode 100644
index 00000000000..0b101d7d41c
--- /dev/null
+++ b/arch/arm/mach-orion5x/terastation_pro2-setup.c
@@ -0,0 +1,369 @@
+/*
+ * 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/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/gpio.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) {
+			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(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,
+	.swizzle        = pci_std_swizzle,
+	.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 struct orion5x_mpp_mode tsp2_mpp_modes[] __initdata = {
+	{  0, MPP_PCIE_RST_OUTn },
+	{  1, MPP_UNUSED },
+	{  2, MPP_UNUSED },
+	{  3, MPP_UNUSED },
+	{  4, MPP_NAND },		/* BOOT NAND Flash REn */
+	{  5, MPP_NAND },		/* BOOT NAND Flash WEn */
+	{  6, MPP_NAND },		/* BOOT NAND Flash HREn[0] */
+	{  7, MPP_NAND },		/* BOOT NAND Flash WEn[0] */
+	{  8, MPP_GPIO },		/* MICON int */
+	{  9, MPP_GPIO },		/* RTC int */
+	{ 10, MPP_UNUSED },
+	{ 11, MPP_GPIO },		/* PCI Int A */
+	{ 12, MPP_UNUSED },
+	{ 13, MPP_GPIO },		/* UPS on UART0 enable */
+	{ 14, MPP_GPIO },		/* UPS low battery detection */
+	{ 15, MPP_UNUSED },
+	{ 16, MPP_UART },		/* UART1 RXD */
+	{ 17, MPP_UART },		/* UART1 TXD */
+	{ 18, MPP_UART },		/* UART1 CTSn */
+	{ 19, MPP_UART },		/* UART1 RTSn */
+	{ -1 },
+};
+
+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> */
+	.phys_io	= ORION5X_REGS_PHYS_BASE,
+	.io_pg_offst	= ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
+	.boot_params	= 0x00000100,
+	.init_machine	= tsp2_init,
+	.map_io		= orion5x_map_io,
+	.init_irq	= orion5x_init_irq,
+	.timer		= &orion5x_timer,
+	.fixup		= tag_fixup_mem32,
+MACHINE_END