diff options
Diffstat (limited to 'kernel/arch/arm/mach-orion5x/terastation_pro2-setup.c')
| -rw-r--r-- | kernel/arch/arm/mach-orion5x/terastation_pro2-setup.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-orion5x/terastation_pro2-setup.c b/kernel/arch/arm/mach-orion5x/terastation_pro2-setup.c new file mode 100644 index 000000000..12086745c --- /dev/null +++ b/kernel/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/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 + +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 <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, + .init_time = orion5x_timer_init, + .fixup = tag_fixup_mem32, + .restart = orion5x_restart, +MACHINE_END |