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fixup-fuloong2e.c
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1 /*
2  * Copyright (C) 2004 ICT CAS
3  * Author: Li xiaoyu, ICT CAS
4  * [email protected]
5  *
6  * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
7  * Author: Fuxin Zhang, [email protected]
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 
19 /* South bridge slot number is set by the pci probe process */
20 static u8 sb_slot = 5;
21 
22 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
23 {
24  int irq = 0;
25 
26  if (slot == sb_slot) {
27  switch (PCI_FUNC(dev->devfn)) {
28  case 2:
29  irq = 10;
30  break;
31  case 3:
32  irq = 11;
33  break;
34  case 5:
35  irq = 9;
36  break;
37  }
38  } else {
39  irq = LOONGSON_IRQ_BASE + 25 + pin;
40  }
41  return irq;
42 
43 }
44 
45 /* Do platform specific device initialization at pci_enable_device() time */
46 int pcibios_plat_dev_init(struct pci_dev *dev)
47 {
48  return 0;
49 }
50 
51 static void __devinit loongson2e_nec_fixup(struct pci_dev *pdev)
52 {
53  unsigned int val;
54 
55  /* Configures port 1, 2, 3, 4 to be validate*/
56  pci_read_config_dword(pdev, 0xe0, &val);
57  pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x4);
58 
59  /* System clock is 48-MHz Oscillator. */
60  pci_write_config_dword(pdev, 0xe4, 1 << 5);
61 }
62 
63 static void __devinit loongson2e_686b_func0_fixup(struct pci_dev *pdev)
64 {
65  unsigned char c;
66 
67  sb_slot = PCI_SLOT(pdev->devfn);
68 
69  printk(KERN_INFO "via686b fix: ISA bridge\n");
70 
71  /* Enable I/O Recovery time */
72  pci_write_config_byte(pdev, 0x40, 0x08);
73 
74  /* Enable ISA refresh */
75  pci_write_config_byte(pdev, 0x41, 0x01);
76 
77  /* disable ISA line buffer */
78  pci_write_config_byte(pdev, 0x45, 0x00);
79 
80  /* Gate INTR, and flush line buffer */
81  pci_write_config_byte(pdev, 0x46, 0xe0);
82 
83  /* Disable PCI Delay Transaction, Enable EISA ports 4D0/4D1. */
84  /* pci_write_config_byte(pdev, 0x47, 0x20); */
85 
86  /*
87  * enable PCI Delay Transaction, Enable EISA ports 4D0/4D1.
88  * enable time-out timer
89  */
90  pci_write_config_byte(pdev, 0x47, 0xe6);
91 
92  /*
93  * enable level trigger on pci irqs: 9,10,11,13
94  * important! without this PCI interrupts won't work
95  */
96  outb(0x2e, 0x4d1);
97 
98  /* 512 K PCI Decode */
99  pci_write_config_byte(pdev, 0x48, 0x01);
100 
101  /* Wait for PGNT before grant to ISA Master/DMA */
102  pci_write_config_byte(pdev, 0x4a, 0x84);
103 
104  /*
105  * Plug'n'Play
106  *
107  * Parallel DRQ 3, Floppy DRQ 2 (default)
108  */
109  pci_write_config_byte(pdev, 0x50, 0x0e);
110 
111  /*
112  * IRQ Routing for Floppy and Parallel port
113  *
114  * IRQ 6 for floppy, IRQ 7 for parallel port
115  */
116  pci_write_config_byte(pdev, 0x51, 0x76);
117 
118  /* IRQ Routing for serial ports (take IRQ 3 and 4) */
119  pci_write_config_byte(pdev, 0x52, 0x34);
120 
121  /* All IRQ's level triggered. */
122  pci_write_config_byte(pdev, 0x54, 0x00);
123 
124  /* route PIRQA-D irq */
125  pci_write_config_byte(pdev, 0x55, 0x90); /* bit 7-4, PIRQA */
126  pci_write_config_byte(pdev, 0x56, 0xba); /* bit 7-4, PIRQC; */
127  /* 3-0, PIRQB */
128  pci_write_config_byte(pdev, 0x57, 0xd0); /* bit 7-4, PIRQD */
129 
130  /* enable function 5/6, audio/modem */
131  pci_read_config_byte(pdev, 0x85, &c);
132  c &= ~(0x3 << 2);
133  pci_write_config_byte(pdev, 0x85, c);
134 
135  printk(KERN_INFO"via686b fix: ISA bridge done\n");
136 }
137 
138 static void __devinit loongson2e_686b_func1_fixup(struct pci_dev *pdev)
139 {
140  printk(KERN_INFO"via686b fix: IDE\n");
141 
142  /* Modify IDE controller setup */
143  pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 48);
144  pci_write_config_byte(pdev, PCI_COMMAND,
145  PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
146  PCI_COMMAND_MASTER);
147  pci_write_config_byte(pdev, 0x40, 0x0b);
148  /* legacy mode */
149  pci_write_config_byte(pdev, 0x42, 0x09);
150 
151 #if 1/* play safe, otherwise we may see notebook's usb keyboard lockup */
152  /* disable read prefetch/write post buffers */
153  pci_write_config_byte(pdev, 0x41, 0x02);
154 
155  /* use 3/4 as fifo thresh hold */
156  pci_write_config_byte(pdev, 0x43, 0x0a);
157  pci_write_config_byte(pdev, 0x44, 0x00);
158 
159  pci_write_config_byte(pdev, 0x45, 0x00);
160 #else
161  pci_write_config_byte(pdev, 0x41, 0xc2);
162  pci_write_config_byte(pdev, 0x43, 0x35);
163  pci_write_config_byte(pdev, 0x44, 0x1c);
164 
165  pci_write_config_byte(pdev, 0x45, 0x10);
166 #endif
167 
168  printk(KERN_INFO"via686b fix: IDE done\n");
169 }
170 
171 static void __devinit loongson2e_686b_func2_fixup(struct pci_dev *pdev)
172 {
173  /* irq routing */
174  pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10);
175 }
176 
177 static void __devinit loongson2e_686b_func3_fixup(struct pci_dev *pdev)
178 {
179  /* irq routing */
180  pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11);
181 }
182 
183 static void __devinit loongson2e_686b_func5_fixup(struct pci_dev *pdev)
184 {
185  unsigned int val;
186  unsigned char c;
187 
188  /* enable IO */
189  pci_write_config_byte(pdev, PCI_COMMAND,
190  PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
191  PCI_COMMAND_MASTER);
192  pci_read_config_dword(pdev, 0x4, &val);
193  pci_write_config_dword(pdev, 0x4, val | 1);
194 
195  /* route ac97 IRQ */
196  pci_write_config_byte(pdev, 0x3c, 9);
197 
198  pci_read_config_byte(pdev, 0x8, &c);
199 
200  /* link control: enable link & SGD PCM output */
201  pci_write_config_byte(pdev, 0x41, 0xcc);
202 
203  /* disable game port, FM, midi, sb, enable write to reg2c-2f */
204  pci_write_config_byte(pdev, 0x42, 0x20);
205 
206  /* we are using Avance logic codec */
207  pci_write_config_word(pdev, 0x2c, 0x1005);
208  pci_write_config_word(pdev, 0x2e, 0x4710);
209  pci_read_config_dword(pdev, 0x2c, &val);
210 
211  pci_write_config_byte(pdev, 0x42, 0x0);
212 }
213 
214 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686,
215  loongson2e_686b_func0_fixup);
216 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
217  loongson2e_686b_func1_fixup);
218 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2,
219  loongson2e_686b_func2_fixup);
220 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3,
221  loongson2e_686b_func3_fixup);
222 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
223  loongson2e_686b_func5_fixup);
224 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
225  loongson2e_nec_fixup);
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