| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
| 21 | * Author: Max Asböck <amax@us.ibm.com> |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/termios.h> |
| 26 | #include <linux/tty.h> |
| 27 | #include <linux/serial_core.h> |
| 28 | #include <linux/serial.h> |
| 29 | #include <linux/serial_reg.h> |
| 30 | #include "ibmasm.h" |
| 31 | #include "lowlevel.h" |
| 32 | |
| 33 | |
| 34 | void ibmasm_register_uart(struct service_processor *sp) |
| 35 | { |
| 36 | struct serial_struct serial; |
| 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 | |
| 50 | memset(&serial, 0, sizeof(serial)); |
| 51 | serial.irq = sp->irq; |
| 52 | serial.baud_base = 3686400 / 16; |
| 53 | serial.flags = UPF_AUTOPROBE | UPF_SHARE_IRQ; |
| 54 | serial.io_type = UPIO_MEM; |
| 55 | serial.iomem_base = iomem_base; |
| 56 | |
| 57 | sp->serial_line = register_serial(&serial); |
| 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); |
| 71 | unregister_serial(sp->serial_line); |
| 72 | } |