| 1 | /* |
| 2 | * Atheros AP94 reference board PCI initialization |
| 3 | * |
| 4 | * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/pci.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/delay.h> |
| 14 | #include <lantiq_soc.h> |
| 15 | |
| 16 | #define LTQ_PCI_MEM_BASE 0x18000000 |
| 17 | |
| 18 | struct ath_fixup { |
| 19 | u16 *cal_data; |
| 20 | unsigned slot; |
| 21 | }; |
| 22 | |
| 23 | static int ath_num_fixups; |
| 24 | static struct ath_fixup ath_fixups[2]; |
| 25 | |
| 26 | static void ath_pci_fixup(struct pci_dev *dev) |
| 27 | { |
| 28 | void __iomem *mem; |
| 29 | u16 *cal_data = NULL; |
| 30 | u16 cmd; |
| 31 | u32 bar0; |
| 32 | u32 val; |
| 33 | unsigned i; |
| 34 | |
| 35 | for (i = 0; i < ath_num_fixups; i++) { |
| 36 | if (ath_fixups[i].cal_data == NULL) |
| 37 | continue; |
| 38 | |
| 39 | if (ath_fixups[i].slot != PCI_SLOT(dev->devfn)) |
| 40 | continue; |
| 41 | |
| 42 | cal_data = ath_fixups[i].cal_data; |
| 43 | break; |
| 44 | } |
| 45 | |
| 46 | if (cal_data == NULL) |
| 47 | return; |
| 48 | |
| 49 | if (*cal_data != 0xa55a) { |
| 50 | pr_err("pci %s: invalid calibration data\n", pci_name(dev)); |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | pr_info("pci %s: fixup device configuration\n", pci_name(dev)); |
| 55 | |
| 56 | mem = ioremap(LTQ_PCI_MEM_BASE, 0x10000); |
| 57 | if (!mem) { |
| 58 | pr_err("pci %s: ioremap error\n", pci_name(dev)); |
| 59 | return; |
| 60 | } |
| 61 | |
| 62 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0); |
| 63 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, LTQ_PCI_MEM_BASE); |
| 64 | pci_read_config_word(dev, PCI_COMMAND, &cmd); |
| 65 | cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY; |
| 66 | pci_write_config_word(dev, PCI_COMMAND, cmd); |
| 67 | |
| 68 | /* set pointer to first reg address */ |
| 69 | cal_data += 3; |
| 70 | while (*cal_data != 0xffff) { |
| 71 | u32 reg; |
| 72 | reg = *cal_data++; |
| 73 | val = *cal_data++; |
| 74 | val |= (*cal_data++) << 16; |
| 75 | |
| 76 | ltq_w32(swab32(val), mem + reg); |
| 77 | udelay(100); |
| 78 | } |
| 79 | |
| 80 | pci_read_config_dword(dev, PCI_VENDOR_ID, &val); |
| 81 | dev->vendor = val & 0xffff; |
| 82 | dev->device = (val >> 16) & 0xffff; |
| 83 | |
| 84 | pci_read_config_dword(dev, PCI_CLASS_REVISION, &val); |
| 85 | dev->revision = val & 0xff; |
| 86 | dev->class = val >> 8; /* upper 3 bytes */ |
| 87 | |
| 88 | pr_info("pci %s: fixup info: [%04x:%04x] revision %02x class %#08x\n", |
| 89 | pci_name(dev), dev->vendor, dev->device, dev->revision, dev->class); |
| 90 | |
| 91 | pci_read_config_word(dev, PCI_COMMAND, &cmd); |
| 92 | cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); |
| 93 | pci_write_config_word(dev, PCI_COMMAND, cmd); |
| 94 | |
| 95 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0); |
| 96 | |
| 97 | iounmap(mem); |
| 98 | } |
| 99 | DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath_pci_fixup); |
| 100 | |
| 101 | void __init ltq_pci_ath_fixup(unsigned slot, u16 *cal_data) |
| 102 | { |
| 103 | if (ath_num_fixups >= ARRAY_SIZE(ath_fixups)) |
| 104 | return; |
| 105 | |
| 106 | ath_fixups[ath_num_fixups].slot = slot; |
| 107 | ath_fixups[ath_num_fixups].cal_data = cal_data; |
| 108 | ath_num_fixups++; |
| 109 | } |
| 110 | |
