drivers/misc/ibmasm/lowlevel.h

   1 /*
   2  * IBM ASM Service Processor Device Driver
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  * Copyright (C) IBM Corporation, 2004
  19  *
  20  * Author: Max Asböck <amax@us.ibm.com>
  21  *
  22  */
  23
  24 /* Condor service processor specific hardware definitions */
  25
  26 #ifndef __IBMASM_CONDOR_H__
  27 #define __IBMASM_CONDOR_H__
  28
  29 #include <asm/io.h>
  30
  31 #define VENDORID_IBM    0x1014
  32 #define DEVICEID_RSA    0x010F
  33
  34 #define GET_MFA_ADDR(x)  (x & 0xFFFFFF00)
  35
  36 #define MAILBOX_FULL(x)  (x & 0x00000001)
  37
  38 #define NO_MFAS_AVAILABLE     0xFFFFFFFF
  39
  40
  41 #define INBOUND_QUEUE_PORT   0x40  /* contains address of next free MFA */
  42 #define OUTBOUND_QUEUE_PORT  0x44  /* contains address of posted MFA    */
  43
  44 #define SP_INTR_MASK    0x00000008
  45 #define UART_INTR_MASK  0x00000010
  46
  47 #define INTR_STATUS_REGISTER   0x13A0
  48 #define INTR_CONTROL_REGISTER  0x13A4
  49
  50 #define SCOUT_COM_A_BASE         0x0000
  51 #define SCOUT_COM_B_BASE         0x0100
  52 #define SCOUT_COM_C_BASE         0x0200
  53 #define SCOUT_COM_D_BASE         0x0300
  54
  55 static inline int sp_interrupt_pending(void __iomem *base_address)
  56 {
  57         return SP_INTR_MASK & readl(base_address + INTR_STATUS_REGISTER);
  58 }
  59
  60 static inline int uart_interrupt_pending(void __iomem *base_address)
  61 {
  62         return UART_INTR_MASK & readl(base_address + INTR_STATUS_REGISTER);
  63 }
  64
  65 static inline void ibmasm_enable_interrupts(void __iomem *base_address, int mask)
  66 {
  67         void __iomem *ctrl_reg = base_address + INTR_CONTROL_REGISTER;
  68         writel( readl(ctrl_reg) & ~mask, ctrl_reg);
  69 }
  70
  71 static inline void ibmasm_disable_interrupts(void __iomem *base_address, int mask)
  72 {
  73         void __iomem *ctrl_reg = base_address + INTR_CONTROL_REGISTER;
  74         writel( readl(ctrl_reg) | mask, ctrl_reg);
  75 }
  76
  77 static inline void enable_sp_interrupts(void __iomem *base_address)
  78 {
  79         ibmasm_enable_interrupts(base_address, SP_INTR_MASK);
  80 }
  81
  82 static inline void disable_sp_interrupts(void __iomem *base_address)
  83 {
  84         ibmasm_disable_interrupts(base_address, SP_INTR_MASK);
  85 }
  86
  87 static inline void enable_uart_interrupts(void __iomem *base_address)
  88 {
  89         ibmasm_enable_interrupts(base_address, UART_INTR_MASK);
  90 }
  91
  92 static inline void disable_uart_interrupts(void __iomem *base_address)
  93 {
  94         ibmasm_disable_interrupts(base_address, UART_INTR_MASK);
  95 }
  96
  97 #define valid_mfa(mfa)  ( (mfa) != NO_MFAS_AVAILABLE )
  98
  99 static inline u32 get_mfa_outbound(void __iomem *base_address)
 100 {
 101         int retry;
 102         u32 mfa;
 103
 104         for (retry=0; retry<=10; retry++) {
 105                 mfa = readl(base_address + OUTBOUND_QUEUE_PORT);
 106                 if (valid_mfa(mfa))
 107                         break;
 108         }
 109         return mfa;
 110 }
 111
 112 static inline void set_mfa_outbound(void __iomem *base_address, u32 mfa)
 113 {
 114         writel(mfa, base_address + OUTBOUND_QUEUE_PORT);
 115 }
 116
 117 static inline u32 get_mfa_inbound(void __iomem *base_address)
 118 {
 119         u32 mfa = readl(base_address + INBOUND_QUEUE_PORT);
 120
 121         if (MAILBOX_FULL(mfa))
 122                 return 0;
 123
 124         return mfa;
 125 }
 126
 127 static inline void set_mfa_inbound(void __iomem *base_address, u32 mfa)
 128 {
 129         writel(mfa, base_address + INBOUND_QUEUE_PORT);
 130 }
 131
 132 static inline struct i2o_message *get_i2o_message(void __iomem *base_address, u32 mfa)
 133 {
 134         return (struct i2o_message *)(GET_MFA_ADDR(mfa) + base_address);
 135 }
 136
 137 #endif /* __IBMASM_CONDOR_H__ */