2 * Cobalt Qube/Raq PCI support
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 1995, 1996, 1997, 2002, 2003 by Ralf Baechle
9 * Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
11 #include <linux/types.h>
12 #include <linux/pci.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
18 #include <asm/gt64120.h>
22 static void qube_raq_galileo_early_fixup(struct pci_dev *dev)
24 if (dev->devfn == PCI_DEVFN(0, 0) &&
25 (dev->class >> 8) == PCI_CLASS_MEMORY_OTHER) {
27 dev->class = (PCI_CLASS_BRIDGE_HOST << 8) | (dev->class & 0xff);
29 printk(KERN_INFO "Galileo: fixed bridge class\n");
33 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
34 qube_raq_galileo_early_fixup);
36 static void qube_raq_via_bmIDE_fixup(struct pci_dev *dev)
38 unsigned short cfgword;
41 /* Enable Bus Mastering and fast back to back. */
42 pci_read_config_word(dev, PCI_COMMAND, &cfgword);
43 cfgword |= (PCI_COMMAND_FAST_BACK | PCI_COMMAND_MASTER);
44 pci_write_config_word(dev, PCI_COMMAND, cfgword);
46 /* Enable both ide interfaces. ROM only enables primary one. */
47 pci_write_config_byte(dev, 0x40, 0xb);
49 /* Set latency timer to reasonable value. */
50 pci_read_config_byte(dev, PCI_LATENCY_TIMER, <);
52 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
53 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
56 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
57 qube_raq_via_bmIDE_fixup);
59 static void qube_raq_galileo_fixup(struct pci_dev *dev)
61 unsigned short galileo_id;
63 if (dev->devfn != PCI_DEVFN(0, 0))
66 /* Fix PCI latency-timer and cache-line-size values in Galileo
69 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
70 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
73 * The code described by the comment below has been removed
74 * as it causes bus mastering by the Ethernet controllers
75 * to break under any kind of network load. We always set
76 * the retry timeouts to their maximum.
78 * --x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--
80 * On all machines prior to Q2, we had the STOP line disconnected
81 * from Galileo to VIA on PCI. The new Galileo does not function
82 * correctly unless we have it connected.
84 * Therefore we must set the disconnect/retry cycle values to
85 * something sensible when using the new Galileo.
87 pci_read_config_word(dev, PCI_REVISION_ID, &galileo_id);
88 galileo_id &= 0xff; /* mask off class info */
90 printk(KERN_INFO "Galileo: revision %u\n", galileo_id);
93 if (galileo_id >= 0x10) {
94 /* New Galileo, assumes PCI stop line to VIA is connected. */
95 GT_WRITE(GT_PCI0_TOR_OFS, 0x4020);
96 } else if (galileo_id == 0x1 || galileo_id == 0x2)
100 /* XXX WE MUST DO THIS ELSE GALILEO LOCKS UP! -DaveM */
101 timeo = GT_READ(GT_PCI0_TOR_OFS);
102 /* Old Galileo, assumes PCI STOP line to VIA is disconnected. */
103 GT_WRITE(GT_PCI0_TOR_OFS,
104 (0xff << 16) | /* retry count */
105 (0xff << 8) | /* timeout 1 */
106 0xff); /* timeout 0 */
108 /* enable PCI retry exceeded interrupt */
109 GT_WRITE(GT_INTRMASK_OFS, GT_INTR_RETRYCTR0_MSK | GT_READ(GT_INTRMASK_OFS));
113 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
114 qube_raq_galileo_fixup);
118 static void qube_raq_via_board_id_fixup(struct pci_dev *dev)
123 retval = pci_read_config_byte(dev, VIA_COBALT_BRD_ID_REG, &id);
125 panic("Cannot read board ID");
129 cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(id);
131 printk(KERN_INFO "Cobalt board ID: %d\n", cobalt_board_id);
134 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0,
135 qube_raq_via_board_id_fixup);
137 static char irq_tab_qube1[] __initdata = {
138 [COBALT_PCICONF_CPU] = 0,
139 [COBALT_PCICONF_ETH0] = COBALT_QUBE1_ETH0_IRQ,
140 [COBALT_PCICONF_RAQSCSI] = COBALT_SCSI_IRQ,
141 [COBALT_PCICONF_VIA] = 0,
142 [COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
143 [COBALT_PCICONF_ETH1] = 0
146 static char irq_tab_cobalt[] __initdata = {
147 [COBALT_PCICONF_CPU] = 0,
148 [COBALT_PCICONF_ETH0] = COBALT_ETH0_IRQ,
149 [COBALT_PCICONF_RAQSCSI] = COBALT_SCSI_IRQ,
150 [COBALT_PCICONF_VIA] = 0,
151 [COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
152 [COBALT_PCICONF_ETH1] = COBALT_ETH1_IRQ
155 static char irq_tab_raq2[] __initdata = {
156 [COBALT_PCICONF_CPU] = 0,
157 [COBALT_PCICONF_ETH0] = COBALT_ETH0_IRQ,
158 [COBALT_PCICONF_RAQSCSI] = COBALT_RAQ_SCSI_IRQ,
159 [COBALT_PCICONF_VIA] = 0,
160 [COBALT_PCICONF_PCISLOT] = COBALT_QUBE_SLOT_IRQ,
161 [COBALT_PCICONF_ETH1] = COBALT_ETH1_IRQ
164 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
166 if (cobalt_board_id < COBALT_BRD_ID_QUBE2)
167 return irq_tab_qube1[slot];
169 if (cobalt_board_id == COBALT_BRD_ID_RAQ2)
170 return irq_tab_raq2[slot];
172 return irq_tab_cobalt[slot];
175 /* Do platform specific device initialization at pci_enable_device() time */
176 int pcibios_plat_dev_init(struct pci_dev *dev)