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