367 lines
9.2 KiB
C
367 lines
9.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Buffalo Terastation Pro II/Live Board Setup
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*
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* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
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*/
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#include <linux/gpio.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/pci.h>
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <linux/mtd/physmap.h>
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#include <linux/mv643xx_eth.h>
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#include <linux/i2c.h>
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#include <linux/serial_reg.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/pci.h>
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#include "common.h"
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#include "mpp.h"
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#include "orion5x.h"
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/*****************************************************************************
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* Terastation Pro 2/Live Info
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****************************************************************************/
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/*
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* Terastation Pro 2 hardware :
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* - Marvell 88F5281-D0
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* - Marvell 88SX6042 SATA controller (PCI)
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* - Marvell 88E1118 Gigabit Ethernet PHY
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* - 256KB NOR flash
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* - 128MB of DDR RAM
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* - PCIe port (not equipped)
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*/
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/*
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* 256K NOR flash Device bus boot chip select
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*/
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#define TSP2_NOR_BOOT_BASE 0xf4000000
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#define TSP2_NOR_BOOT_SIZE SZ_256K
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/*****************************************************************************
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* 256KB NOR Flash on BOOT Device
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****************************************************************************/
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static struct physmap_flash_data tsp2_nor_flash_data = {
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.width = 1,
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};
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static struct resource tsp2_nor_flash_resource = {
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.flags = IORESOURCE_MEM,
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.start = TSP2_NOR_BOOT_BASE,
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.end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
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};
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static struct platform_device tsp2_nor_flash = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &tsp2_nor_flash_data,
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},
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.num_resources = 1,
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.resource = &tsp2_nor_flash_resource,
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};
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/*****************************************************************************
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* PCI
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****************************************************************************/
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#define TSP2_PCI_SLOT0_OFFS 7
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#define TSP2_PCI_SLOT0_IRQ_PIN 11
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static void __init tsp2_pci_preinit(void)
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{
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int pin;
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/*
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* Configure PCI GPIO IRQ pins
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*/
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pin = TSP2_PCI_SLOT0_IRQ_PIN;
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if (gpio_request(pin, "PCI Int1") == 0) {
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if (gpio_direction_input(pin) == 0) {
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irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
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} else {
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printk(KERN_ERR "tsp2_pci_preinit failed "
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"to set_irq_type pin %d\n", pin);
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gpio_free(pin);
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}
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} else {
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printk(KERN_ERR "tsp2_pci_preinit failed to "
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"gpio_request %d\n", pin);
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}
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}
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static int __init tsp2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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int irq;
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/*
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* Check for devices with hard-wired IRQs.
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*/
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irq = orion5x_pci_map_irq(dev, slot, pin);
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if (irq != -1)
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return irq;
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/*
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* PCI IRQs are connected via GPIOs.
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*/
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if (slot == TSP2_PCI_SLOT0_OFFS)
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return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);
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return -1;
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}
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static struct hw_pci tsp2_pci __initdata = {
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.nr_controllers = 2,
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.preinit = tsp2_pci_preinit,
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.setup = orion5x_pci_sys_setup,
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.scan = orion5x_pci_sys_scan_bus,
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.map_irq = tsp2_pci_map_irq,
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};
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static int __init tsp2_pci_init(void)
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{
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if (machine_is_terastation_pro2())
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pci_common_init(&tsp2_pci);
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return 0;
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}
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subsys_initcall(tsp2_pci_init);
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/*****************************************************************************
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* Ethernet
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****************************************************************************/
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static struct mv643xx_eth_platform_data tsp2_eth_data = {
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.phy_addr = 0,
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};
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/*****************************************************************************
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* RTC 5C372a on I2C bus
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****************************************************************************/
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#define TSP2_RTC_GPIO 9
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static struct i2c_board_info __initdata tsp2_i2c_rtc = {
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I2C_BOARD_INFO("rs5c372a", 0x32),
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};
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/*****************************************************************************
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* Terastation Pro II specific power off method via UART1-attached
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* microcontroller
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****************************************************************************/
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#define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2))
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static int tsp2_miconread(unsigned char *buf, int count)
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{
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int i;
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int timeout;
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for (i = 0; i < count; i++) {
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timeout = 10;
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while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
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if (--timeout == 0)
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break;
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udelay(1000);
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}
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if (timeout == 0)
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break;
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buf[i] = readl(UART1_REG(RX));
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}
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/* return read bytes */
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return i;
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}
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static int tsp2_miconwrite(const unsigned char *buf, int count)
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{
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int i = 0;
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while (count--) {
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while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
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barrier();
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writel(buf[i++], UART1_REG(TX));
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}
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return 0;
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}
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static int tsp2_miconsend(const unsigned char *data, int count)
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{
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int i;
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unsigned char checksum = 0;
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unsigned char recv_buf[40];
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unsigned char send_buf[40];
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unsigned char correct_ack[3];
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int retry = 2;
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/* Generate checksum */
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for (i = 0; i < count; i++)
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checksum -= data[i];
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do {
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/* Send data */
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tsp2_miconwrite(data, count);
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/* send checksum */
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tsp2_miconwrite(&checksum, 1);
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if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
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printk(KERN_ERR ">%s: receive failed.\n", __func__);
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/* send preamble to clear the receive buffer */
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memset(&send_buf, 0xff, sizeof(send_buf));
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tsp2_miconwrite(send_buf, sizeof(send_buf));
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/* make dummy reads */
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mdelay(100);
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tsp2_miconread(recv_buf, sizeof(recv_buf));
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} else {
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/* Generate expected ack */
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correct_ack[0] = 0x01;
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correct_ack[1] = data[1];
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correct_ack[2] = 0x00;
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/* checksum Check */
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if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
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recv_buf[3]) & 0xFF) {
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printk(KERN_ERR ">%s: Checksum Error : "
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"Received data[%02x, %02x, %02x, %02x]"
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"\n", __func__, recv_buf[0],
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recv_buf[1], recv_buf[2], recv_buf[3]);
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} else {
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/* Check Received Data */
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if (correct_ack[0] == recv_buf[0] &&
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correct_ack[1] == recv_buf[1] &&
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correct_ack[2] == recv_buf[2]) {
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/* Interval for next command */
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mdelay(10);
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/* Receive ACK */
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return 0;
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}
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}
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/* Received NAK or illegal Data */
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printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
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"Received\n", __func__);
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}
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} while (retry--);
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/* Interval for next command */
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mdelay(10);
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return -1;
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}
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static void tsp2_power_off(void)
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{
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const unsigned char watchdogkill[] = {0x01, 0x35, 0x00};
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const unsigned char shutdownwait[] = {0x00, 0x0c};
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const unsigned char poweroff[] = {0x00, 0x06};
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/* 38400 baud divisor */
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const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
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pr_info("%s: triggering power-off...\n", __func__);
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/* hijack uart1 and reset into sane state (38400,8n1,even parity) */
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writel(0x83, UART1_REG(LCR));
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writel(divisor & 0xff, UART1_REG(DLL));
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writel((divisor >> 8) & 0xff, UART1_REG(DLM));
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writel(0x1b, UART1_REG(LCR));
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writel(0x00, UART1_REG(IER));
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writel(0x07, UART1_REG(FCR));
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writel(0x00, UART1_REG(MCR));
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/* Send the commands to shutdown the Terastation Pro II */
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tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
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tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
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tsp2_miconsend(poweroff, sizeof(poweroff));
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}
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/*****************************************************************************
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* General Setup
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****************************************************************************/
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static unsigned int tsp2_mpp_modes[] __initdata = {
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MPP0_PCIE_RST_OUTn,
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MPP1_UNUSED,
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MPP2_UNUSED,
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MPP3_UNUSED,
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MPP4_NAND, /* BOOT NAND Flash REn */
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MPP5_NAND, /* BOOT NAND Flash WEn */
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MPP6_NAND, /* BOOT NAND Flash HREn[0] */
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MPP7_NAND, /* BOOT NAND Flash WEn[0] */
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MPP8_GPIO, /* MICON int */
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MPP9_GPIO, /* RTC int */
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MPP10_UNUSED,
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MPP11_GPIO, /* PCI Int A */
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MPP12_UNUSED,
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MPP13_GPIO, /* UPS on UART0 enable */
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MPP14_GPIO, /* UPS low battery detection */
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MPP15_UNUSED,
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MPP16_UART, /* UART1 RXD */
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MPP17_UART, /* UART1 TXD */
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MPP18_UART, /* UART1 CTSn */
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MPP19_UART, /* UART1 RTSn */
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0,
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};
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static void __init tsp2_init(void)
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{
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/*
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* Setup basic Orion functions. Need to be called early.
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*/
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orion5x_init();
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orion5x_mpp_conf(tsp2_mpp_modes);
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/*
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* Configure peripherals.
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*/
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mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
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ORION_MBUS_DEVBUS_BOOT_ATTR,
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TSP2_NOR_BOOT_BASE,
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TSP2_NOR_BOOT_SIZE);
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platform_device_register(&tsp2_nor_flash);
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orion5x_ehci0_init();
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orion5x_eth_init(&tsp2_eth_data);
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orion5x_i2c_init();
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orion5x_uart0_init();
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orion5x_uart1_init();
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/* Get RTC IRQ and register the chip */
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if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
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if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
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tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
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else
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gpio_free(TSP2_RTC_GPIO);
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}
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if (tsp2_i2c_rtc.irq == 0)
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pr_warn("tsp2_init: failed to get RTC IRQ\n");
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i2c_register_board_info(0, &tsp2_i2c_rtc, 1);
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/* register Terastation Pro II specific power-off method */
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pm_power_off = tsp2_power_off;
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}
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MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
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/* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */
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.atag_offset = 0x100,
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.nr_irqs = ORION5X_NR_IRQS,
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.init_machine = tsp2_init,
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.map_io = orion5x_map_io,
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.init_early = orion5x_init_early,
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.init_irq = orion5x_init_irq,
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.init_time = orion5x_timer_init,
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.fixup = tag_fixup_mem32,
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.restart = orion5x_restart,
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MACHINE_END
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