[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 ff405c47490f..c738f450f936 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 b6da94bdb3f7..39e41a6b61e1 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 000000000000..0b101d7d41c2
--- /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