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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9e95685084
Kurobox Pro/Linkstation Pro devices use a microcontroller connected to UART1. As most of the communication with this microcontroller is done from userland (power button detection, fan speed ...), the setup file has to make UART1 available from userland. Signed-off-by: Sylver Bruneau <sylver.bruneau@googlemail.com> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
403 lines
10 KiB
C
403 lines
10 KiB
C
/*
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* arch/arm/mach-orion5x/kurobox_pro-setup.c
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*
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* Maintainer: Ronen Shitrit <rshitrit@marvell.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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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/mtd/nand.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 <linux/ata_platform.h>
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#include <asm/mach-types.h>
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#include <asm/gpio.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/pci.h>
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#include <asm/arch/orion5x.h>
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#include <asm/plat-orion/orion_nand.h>
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#include "common.h"
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#include "mpp.h"
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/*****************************************************************************
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* KUROBOX-PRO Info
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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 KUROBOX_PRO_NOR_BOOT_BASE 0xf4000000
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#define KUROBOX_PRO_NOR_BOOT_SIZE SZ_256K
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/*
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* 256M NAND flash on Device bus chip select 1
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*/
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#define KUROBOX_PRO_NAND_BASE 0xfc000000
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#define KUROBOX_PRO_NAND_SIZE SZ_2M
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/*****************************************************************************
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* 256MB NAND Flash on Device bus CS0
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****************************************************************************/
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static struct mtd_partition kurobox_pro_nand_parts[] = {
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{
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.name = "uImage",
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.offset = 0,
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.size = SZ_4M,
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}, {
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.name = "rootfs",
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.offset = SZ_4M,
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.size = SZ_64M,
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}, {
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.name = "extra",
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.offset = SZ_4M + SZ_64M,
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.size = SZ_256M - (SZ_4M + SZ_64M),
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},
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};
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static struct resource kurobox_pro_nand_resource = {
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.flags = IORESOURCE_MEM,
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.start = KUROBOX_PRO_NAND_BASE,
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.end = KUROBOX_PRO_NAND_BASE + KUROBOX_PRO_NAND_SIZE - 1,
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};
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static struct orion_nand_data kurobox_pro_nand_data = {
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.parts = kurobox_pro_nand_parts,
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.nr_parts = ARRAY_SIZE(kurobox_pro_nand_parts),
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.cle = 0,
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.ale = 1,
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.width = 8,
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};
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static struct platform_device kurobox_pro_nand_flash = {
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.name = "orion_nand",
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.id = -1,
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.dev = {
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.platform_data = &kurobox_pro_nand_data,
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},
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.resource = &kurobox_pro_nand_resource,
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.num_resources = 1,
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};
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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 kurobox_pro_nor_flash_data = {
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.width = 1,
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};
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static struct resource kurobox_pro_nor_flash_resource = {
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.flags = IORESOURCE_MEM,
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.start = KUROBOX_PRO_NOR_BOOT_BASE,
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.end = KUROBOX_PRO_NOR_BOOT_BASE + KUROBOX_PRO_NOR_BOOT_SIZE - 1,
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};
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static struct platform_device kurobox_pro_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 = &kurobox_pro_nor_flash_data,
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},
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.num_resources = 1,
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.resource = &kurobox_pro_nor_flash_resource,
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};
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/*****************************************************************************
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* PCI
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****************************************************************************/
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static int __init kurobox_pro_pci_map_irq(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 isn't used on the Kuro
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*/
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return -1;
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}
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static struct hw_pci kurobox_pro_pci __initdata = {
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.nr_controllers = 2,
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.swizzle = pci_std_swizzle,
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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 = kurobox_pro_pci_map_irq,
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};
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static int __init kurobox_pro_pci_init(void)
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{
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if (machine_is_kurobox_pro())
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pci_common_init(&kurobox_pro_pci);
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return 0;
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}
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subsys_initcall(kurobox_pro_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 kurobox_pro_eth_data = {
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.phy_addr = 8,
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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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static struct i2c_board_info __initdata kurobox_pro_i2c_rtc = {
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I2C_BOARD_INFO("rs5c372a", 0x32),
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};
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/*****************************************************************************
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* SATA
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****************************************************************************/
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static struct mv_sata_platform_data kurobox_pro_sata_data = {
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.n_ports = 2,
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};
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/*****************************************************************************
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* Kurobox Pro specific power off method via UART1-attached 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 kurobox_pro_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 kurobox_pro_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 kurobox_pro_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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kurobox_pro_miconwrite(data, count);
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/* send checksum */
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kurobox_pro_miconwrite(&checksum, 1);
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if (kurobox_pro_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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kurobox_pro_miconwrite(send_buf, sizeof(send_buf));
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/* make dummy reads */
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mdelay(100);
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kurobox_pro_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 kurobox_pro_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 Kurobox Pro */
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kurobox_pro_miconsend(watchdogkill, sizeof(watchdogkill)) ;
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kurobox_pro_miconsend(shutdownwait, sizeof(shutdownwait)) ;
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kurobox_pro_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 struct orion5x_mpp_mode kurobox_pro_mpp_modes[] __initdata = {
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{ 0, MPP_UNUSED },
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{ 1, MPP_UNUSED },
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{ 2, MPP_GPIO }, /* GPIO Micon */
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{ 3, MPP_GPIO }, /* GPIO Rtc */
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{ 4, MPP_UNUSED },
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{ 5, MPP_UNUSED },
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{ 6, MPP_NAND }, /* NAND Flash REn */
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{ 7, MPP_NAND }, /* NAND Flash WEn */
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{ 8, MPP_UNUSED },
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{ 9, MPP_UNUSED },
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{ 10, MPP_UNUSED },
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{ 11, MPP_UNUSED },
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{ 12, MPP_SATA_LED }, /* SATA 0 presence */
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{ 13, MPP_SATA_LED }, /* SATA 1 presence */
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{ 14, MPP_SATA_LED }, /* SATA 0 active */
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{ 15, MPP_SATA_LED }, /* SATA 1 active */
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{ 16, MPP_UART }, /* UART1 RXD */
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{ 17, MPP_UART }, /* UART1 TXD */
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{ 18, MPP_UART }, /* UART1 CTSn */
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{ 19, MPP_UART }, /* UART1 RTSn */
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{ -1 },
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};
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static void __init kurobox_pro_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(kurobox_pro_mpp_modes);
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/*
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* Configure peripherals.
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*/
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orion5x_ehci0_init();
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orion5x_ehci1_init();
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orion5x_eth_init(&kurobox_pro_eth_data);
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orion5x_i2c_init();
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orion5x_sata_init(&kurobox_pro_sata_data);
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orion5x_uart0_init();
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orion5x_uart1_init();
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orion5x_setup_dev_boot_win(KUROBOX_PRO_NOR_BOOT_BASE,
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KUROBOX_PRO_NOR_BOOT_SIZE);
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platform_device_register(&kurobox_pro_nor_flash);
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if (machine_is_kurobox_pro()) {
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orion5x_setup_dev0_win(KUROBOX_PRO_NAND_BASE,
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KUROBOX_PRO_NAND_SIZE);
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platform_device_register(&kurobox_pro_nand_flash);
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}
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i2c_register_board_info(0, &kurobox_pro_i2c_rtc, 1);
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/* register Kurobox Pro specific power-off method */
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pm_power_off = kurobox_pro_power_off;
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}
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#ifdef CONFIG_MACH_KUROBOX_PRO
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MACHINE_START(KUROBOX_PRO, "Buffalo/Revogear Kurobox Pro")
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/* Maintainer: Ronen Shitrit <rshitrit@marvell.com> */
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.phys_io = ORION5X_REGS_PHYS_BASE,
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.io_pg_offst = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
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.boot_params = 0x00000100,
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.init_machine = kurobox_pro_init,
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.map_io = orion5x_map_io,
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.init_irq = orion5x_init_irq,
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.timer = &orion5x_timer,
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.fixup = tag_fixup_mem32,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_LINKSTATION_PRO
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MACHINE_START(LINKSTATION_PRO, "Buffalo Linkstation Pro/Live")
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/* Maintainer: Byron Bradley <byron.bbradley@gmail.com> */
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.phys_io = ORION5X_REGS_PHYS_BASE,
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.io_pg_offst = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
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.boot_params = 0x00000100,
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.init_machine = kurobox_pro_init,
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.map_io = orion5x_map_io,
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.init_irq = orion5x_init_irq,
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.timer = &orion5x_timer,
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.fixup = tag_fixup_mem32,
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MACHINE_END
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#endif
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