1 /*
2  * arch/sh/drivers/pci/fixups-rts7751r2d.c
3  *
4  * RTS7751R2D / LBOXRE2 PCI fixups
5  *
6  * Copyright (C) 2003  Lineo uSolutions, Inc.
7  * Copyright (C) 2004  Paul Mundt
8  * Copyright (C) 2007  Nobuhiro Iwamatsu
9  *
10  * This file is subject to the terms and conditions of the GNU General Public
11  * License.  See the file "COPYING" in the main directory of this archive
12  * for more details.
13  */
14 #include <linux/pci.h>
15 #include <mach/lboxre2.h>
16 #include <mach/r2d.h>
17 #include "pci-sh4.h"
18 #include <generated/machtypes.h>
19 
20 #define PCIMCR_MRSET_OFF	0xBFFFFFFF
21 #define PCIMCR_RFSH_OFF		0xFFFFFFFB
22 
23 static u8 rts7751r2d_irq_tab[] = {
24 	IRQ_PCI_INTA,
25 	IRQ_PCI_INTB,
26 	IRQ_PCI_INTC,
27 	IRQ_PCI_INTD,
28 };
29 
30 static char lboxre2_irq_tab[] = {
31 	IRQ_ETH0, IRQ_ETH1, IRQ_INTA, IRQ_INTD,
32 };
33 
34 int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
35 {
36 	if (mach_is_lboxre2())
37 		return lboxre2_irq_tab[slot];
38 	else
39 		return rts7751r2d_irq_tab[slot];
40 }
41 
42 int pci_fixup_pcic(struct pci_channel *chan)
43 {
44 	unsigned long bcr1, mcr;
45 
46 	bcr1 = __raw_readl(SH7751_BCR1);
47 	bcr1 |= 0x40080000;	/* Enable Bit 19 BREQEN, set PCIC to slave */
48 	pci_write_reg(chan, bcr1, SH4_PCIBCR1);
49 
50 	/* Enable all interrupts, so we known what to fix */
51 	pci_write_reg(chan, 0x0000c3ff, SH4_PCIINTM);
52 	pci_write_reg(chan, 0x0000380f, SH4_PCIAINTM);
53 
54 	pci_write_reg(chan, 0xfb900047, SH7751_PCICONF1);
55 	pci_write_reg(chan, 0xab000001, SH7751_PCICONF4);
56 
57 	mcr = __raw_readl(SH7751_MCR);
58 	mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
59 	pci_write_reg(chan, mcr, SH4_PCIMCR);
60 
61 	pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
62 	pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
63 	pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
64 	pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
65 
66 	return 0;
67 }
68