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Linux/arch/sh/drivers/pci/pci-dreamcast.c

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Diff markup

Differences between /arch/sh/drivers/pci/pci-dreamcast.c (Version linux-6.12-rc7) and /arch/i386/drivers/pci/pci-dreamcast.c (Version linux-2.6.32.71)


  1 // SPDX-License-Identifier: GPL-2.0                 1 
  2 /*                                                
  3  * PCI support for the Sega Dreamcast             
  4  *                                                
  5  * Copyright (C) 2001, 2002  M. R. Brown          
  6  * Copyright (C) 2002, 2003  Paul Mundt           
  7  *                                                
  8  * This file originally bore the message (with    
  9  *      Id: pci.c,v 1.3 2003/05/04 19:29:46 le    
 10  *      Dreamcast PCI: Supports SEGA Broadband    
 11  */                                               
 12                                                   
 13 #include <linux/sched.h>                          
 14 #include <linux/kernel.h>                         
 15 #include <linux/param.h>                          
 16 #include <linux/interrupt.h>                      
 17 #include <linux/init.h>                           
 18 #include <linux/irq.h>                            
 19 #include <linux/pci.h>                            
 20 #include <linux/module.h>                         
 21 #include <asm/io.h>                               
 22 #include <asm/irq.h>                              
 23 #include <mach/pci.h>                             
 24                                                   
 25 static struct resource gapspci_resources[] = {    
 26         {                                         
 27                 .name   = "GAPSPCI IO",           
 28                 .start  = GAPSPCI_BBA_CONFIG,     
 29                 .end    = GAPSPCI_BBA_CONFIG +    
 30                 .flags  = IORESOURCE_IO,          
 31         },  {                                     
 32                 .name   = "GAPSPCI mem",          
 33                 .start  = GAPSPCI_DMA_BASE,       
 34                 .end    = GAPSPCI_DMA_BASE + G    
 35                 .flags  = IORESOURCE_MEM,         
 36         },                                        
 37 };                                                
 38                                                   
 39 static struct pci_channel dreamcast_pci_contro    
 40         .pci_ops        = &gapspci_pci_ops,       
 41         .resources      = gapspci_resources,      
 42         .nr_resources   = ARRAY_SIZE(gapspci_r    
 43         .io_offset      = 0x00000000,             
 44         .mem_offset     = 0x00000000,             
 45 };                                                
 46                                                   
 47 /*                                                
 48  * gapspci init                                   
 49  */                                               
 50                                                   
 51 static int __init gapspci_init(void)              
 52 {                                                 
 53         char idbuf[16];                           
 54         int i;                                    
 55                                                   
 56         /*                                        
 57          * FIXME: All of this wants documentin    
 58          * even some basic register definition    
 59          *                                        
 60          * I haven't seen anything this ugly s    
 61          */                                       
 62                                                   
 63         for (i=0; i<16; i++)                      
 64                 idbuf[i] = inb(GAPSPCI_REGS+i)    
 65                                                   
 66         if (strncmp(idbuf, "GAPSPCI_BRIDGE_2",    
 67                 return -ENODEV;                   
 68                                                   
 69         outl(0x5a14a501, GAPSPCI_REGS+0x18);      
 70                                                   
 71         for (i=0; i<1000000; i++)                 
 72                 cpu_relax();                      
 73                                                   
 74         if (inl(GAPSPCI_REGS+0x18) != 1)          
 75                 return -EINVAL;                   
 76                                                   
 77         outl(0x01000000, GAPSPCI_REGS+0x20);      
 78         outl(0x01000000, GAPSPCI_REGS+0x24);      
 79                                                   
 80         outl(GAPSPCI_DMA_BASE, GAPSPCI_REGS+0x    
 81         outl(GAPSPCI_DMA_BASE+GAPSPCI_DMA_SIZE    
 82                                                   
 83         outl(1, GAPSPCI_REGS+0x14);               
 84         outl(1, GAPSPCI_REGS+0x34);               
 85                                                   
 86         /* Setting Broadband Adapter */           
 87         outw(0xf900, GAPSPCI_BBA_CONFIG+0x06);    
 88         outl(0x00000000, GAPSPCI_BBA_CONFIG+0x    
 89         outb(0x00, GAPSPCI_BBA_CONFIG+0x3c);      
 90         outb(0xf0, GAPSPCI_BBA_CONFIG+0x0d);      
 91         outw(0x0006, GAPSPCI_BBA_CONFIG+0x04);    
 92         outl(0x00002001, GAPSPCI_BBA_CONFIG+0x    
 93         outl(0x01000000, GAPSPCI_BBA_CONFIG+0x    
 94                                                   
 95         return register_pci_controller(&dreamc    
 96 }                                                 
 97 arch_initcall(gapspci_init);                      
 98                                                   

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