projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | |
| 2 | /* | |
| 3 | * IBM ASM Service Processor Device Driver | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License as published by | |
| 7 | * the Free Software Foundation; either version 2 of the License, or | |
| 8 | * (at your option) any later version. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 18 | * | |
| 19 | * Copyright (C) IBM Corporation, 2004 | |
| 20 | * | |
| d36b6910 | 21 | * Author: Max Asböck <amax@us.ibm.com> |
| 1da177e4 LT |
22 | * |
| 23 | */ | |
| 24 | ||
| 25 | #include <linux/termios.h> | |
| 26 | #include <linux/tty.h> | |
| 27 | #include <linux/serial_core.h> | |
| 1da177e4 | 28 | #include <linux/serial_reg.h> |
| 66172d25 | 29 | #include <linux/serial_8250.h> |
| 1da177e4 LT |
30 | #include "ibmasm.h" |
| 31 | #include "lowlevel.h" | |
| 32 | ||
| 33 | ||
| 34 | void ibmasm_register_uart(struct service_processor *sp) | |
| 35 | { | |
| ce7240e4 | 36 | struct uart_8250_port uart; |
| 1da177e4 LT |
37 | void __iomem *iomem_base; |
| 38 | ||
| 39 | iomem_base = sp->base_address + SCOUT_COM_B_BASE; | |
| 40 | ||
| 41 | /* read the uart scratch register to determine if the UART | |
| 42 | * is dedicated to the service processor or if the OS can use it | |
| 43 | */ | |
| 44 | if (0 == readl(iomem_base + UART_SCR)) { | |
| 45 | dev_info(sp->dev, "IBM SP UART not registered, owned by service processor\n"); | |
| 46 | sp->serial_line = -1; | |
| 47 | return; | |
| 48 | } | |
| 49 | ||
| ce7240e4 AC |
50 | memset(&uart, 0, sizeof(uart)); |
| 51 | uart.port.irq = sp->irq; | |
| 52 | uart.port.uartclk = 3686400; | |
| 53 | uart.port.flags = UPF_SHARE_IRQ; | |
| 54 | uart.port.iotype = UPIO_MEM; | |
| 55 | uart.port.membase = iomem_base; | |
| 1da177e4 | 56 | |
| ce7240e4 | 57 | sp->serial_line = serial8250_register_8250_port(&uart); |
| 1da177e4 LT |
58 | if (sp->serial_line < 0) { |
| 59 | dev_err(sp->dev, "Failed to register serial port\n"); | |
| 60 | return; | |
| 61 | } | |
| 62 | enable_uart_interrupts(sp->base_address); | |
| 63 | } | |
| 64 | ||
| 65 | void ibmasm_unregister_uart(struct service_processor *sp) | |
| 66 | { | |
| 67 | if (sp->serial_line < 0) | |
| 68 | return; | |
| 69 | ||
| 70 | disable_uart_interrupts(sp->base_address); | |
| 66172d25 | 71 | serial8250_unregister_port(sp->serial_line); |
| 1da177e4 | 72 | } |