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Linux/arch/mips/pci/fixup-lemote2f.c

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  1 /*
  2  * Copyright (C) 2008 Lemote Technology
  3  * Copyright (C) 2004 ICT CAS
  4  * Author: Li xiaoyu, lixy@ict.ac.cn
  5  *
  6  * Copyright (C) 2007 Lemote, Inc.
  7  * Author: Fuxin Zhang, zhangfx@lemote.com
  8  *
  9  *  This program is free software; you can redistribute  it and/or modify it
 10  *  under  the terms of  the GNU General  Public License as published by the
 11  *  Free Software Foundation;  either version 2 of the  License, or (at your
 12  *  option) any later version.
 13  */
 14 #include <linux/init.h>
 15 #include <linux/pci.h>
 16 
 17 #include <loongson.h>
 18 #include <cs5536/cs5536.h>
 19 #include <cs5536/cs5536_pci.h>
 20 
 21 /* PCI interrupt pins
 22  *
 23  * These should not be changed, or you should consider loongson2f interrupt
 24  * register and your pci card dispatch
 25  */
 26 
 27 #define PCIA            4
 28 #define PCIB            5
 29 #define PCIC            6
 30 #define PCID            7
 31 
 32 /* all the pci device has the PCIA pin, check the datasheet. */
 33 static char irq_tab[][5] __initdata = {
 34         /*      INTA    INTB    INTC    INTD */
 35         {0, 0, 0, 0, 0},        /*  11: Unused */
 36         {0, 0, 0, 0, 0},        /*  12: Unused */
 37         {0, 0, 0, 0, 0},        /*  13: Unused */
 38         {0, 0, 0, 0, 0},        /*  14: Unused */
 39         {0, 0, 0, 0, 0},        /*  15: Unused */
 40         {0, 0, 0, 0, 0},        /*  16: Unused */
 41         {0, PCIA, 0, 0, 0},     /*  17: RTL8110-0 */
 42         {0, PCIB, 0, 0, 0},     /*  18: RTL8110-1 */
 43         {0, PCIC, 0, 0, 0},     /*  19: SiI3114 */
 44         {0, PCID, 0, 0, 0},     /*  20: 3-ports nec usb */
 45         {0, PCIA, PCIB, PCIC, PCID},    /*  21: PCI-SLOT */
 46         {0, 0, 0, 0, 0},        /*  22: Unused */
 47         {0, 0, 0, 0, 0},        /*  23: Unused */
 48         {0, 0, 0, 0, 0},        /*  24: Unused */
 49         {0, 0, 0, 0, 0},        /*  25: Unused */
 50         {0, 0, 0, 0, 0},        /*  26: Unused */
 51         {0, 0, 0, 0, 0},        /*  27: Unused */
 52 };
 53 
 54 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 55 {
 56         int virq;
 57 
 58         if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
 59             && (PCI_SLOT(dev->devfn) < 32)) {
 60                 virq = irq_tab[slot][pin];
 61                 printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
 62                        virq + LOONGSON_IRQ_BASE);
 63                 if (virq != 0)
 64                         return LOONGSON_IRQ_BASE + virq;
 65                 else
 66                         return 0;
 67         } else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) {  /*  cs5536 */
 68                 switch (PCI_FUNC(dev->devfn)) {
 69                 case 2:
 70                         pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
 71                                               CS5536_IDE_INTR);
 72                         return CS5536_IDE_INTR; /*  for IDE */
 73                 case 3:
 74                         pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
 75                                               CS5536_ACC_INTR);
 76                         return CS5536_ACC_INTR; /*  for AUDIO */
 77                 case 4: /*  for OHCI */
 78                 case 5: /*  for EHCI */
 79                 case 6: /*  for UDC */
 80                 case 7: /*  for OTG */
 81                         pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
 82                                               CS5536_USB_INTR);
 83                         return CS5536_USB_INTR;
 84                 }
 85                 return dev->irq;
 86         } else {
 87                 printk(KERN_INFO " strange pci slot number.\n");
 88                 return 0;
 89         }
 90 }
 91 
 92 /* Do platform specific device initialization at pci_enable_device() time */
 93 int pcibios_plat_dev_init(struct pci_dev *dev)
 94 {
 95         return 0;
 96 }
 97 
 98 /* CS5536 SPEC. fixup */
 99 static void loongson_cs5536_isa_fixup(struct pci_dev *pdev)
100 {
101         /* the uart1 and uart2 interrupt in PIC is enabled as default */
102         pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
103         pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
104 }
105 
106 static void loongson_cs5536_ide_fixup(struct pci_dev *pdev)
107 {
108         /* setting the mutex pin as IDE function */
109         pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
110                                CS5536_IDE_FLASH_SIGNATURE);
111 }
112 
113 static void loongson_cs5536_acc_fixup(struct pci_dev *pdev)
114 {
115         /* enable the AUDIO interrupt in PIC  */
116         pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
117 
118         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
119 }
120 
121 static void loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
122 {
123         /* enable the OHCI interrupt in PIC */
124         /* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
125         pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
126 }
127 
128 static void loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
129 {
130         u32 hi, lo;
131 
132         /* Serial short detect enable */
133         _rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
134         _wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
135 
136         /* setting the USB2.0 micro frame length */
137         pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
138 }
139 
140 static void loongson_nec_fixup(struct pci_dev *pdev)
141 {
142         unsigned int val;
143 
144         pci_read_config_dword(pdev, 0xe0, &val);
145         /* Only 2 port be used */
146         pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
147 }
148 
149 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
150                          loongson_cs5536_isa_fixup);
151 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
152                          loongson_cs5536_ohci_fixup);
153 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
154                          loongson_cs5536_ehci_fixup);
155 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
156                          loongson_cs5536_acc_fixup);
157 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
158                          loongson_cs5536_ide_fixup);
159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
160                          loongson_nec_fixup);
161 

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