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
pcibios_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)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 */
pcibios_plat_dev_init(struct pci_dev * dev)93 int pcibios_plat_dev_init(struct pci_dev *dev)
94 {
95 return 0;
96 }
97
98 /* CS5536 SPEC. fixup */
loongson_cs5536_isa_fixup(struct pci_dev * pdev)99 static void __init 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
loongson_cs5536_ide_fixup(struct pci_dev * pdev)106 static void __init 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
loongson_cs5536_acc_fixup(struct pci_dev * pdev)113 static void __init 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
loongson_cs5536_ohci_fixup(struct pci_dev * pdev)121 static void __init 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
loongson_cs5536_ehci_fixup(struct pci_dev * pdev)128 static void __init 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
loongson_nec_fixup(struct pci_dev * pdev)140 static void __init 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