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>
26 #define COBALT_PCICONF_CPU 0x06
27 #define COBALT_PCICONF_ETH0 0x07
28 #define COBALT_PCICONF_RAQSCSI 0x08
29 #define COBALT_PCICONF_VIA 0x09
30 #define COBALT_PCICONF_PCISLOT 0x0A
31 #define COBALT_PCICONF_ETH1 0x0C
34 * The Cobalt board ID information. The boards have an ID number wired
35 * into the VIA that is available in the high nibble of register 94.
37 #define VIA_COBALT_BRD_ID_REG 0x94
38 #define VIA_COBALT_BRD_REG_to_ID(reg) ((unsigned char)(reg) >> 4)
40 static void qube_raq_galileo_early_fixup(struct pci_dev *dev)
42 if (dev->devfn == PCI_DEVFN(0, 0) &&
43 (dev->class >> 8) == PCI_CLASS_MEMORY_OTHER) {
45 dev->class = (PCI_CLASS_BRIDGE_HOST << 8) | (dev->class & 0xff);
47 printk(KERN_INFO "Galileo: fixed bridge class\n");
51 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
52 qube_raq_galileo_early_fixup);
54 static void qube_raq_via_bmIDE_fixup(struct pci_dev *dev)
56 unsigned short cfgword;
59 /* Enable Bus Mastering and fast back to back. */
60 pci_read_config_word(dev, PCI_COMMAND, &cfgword);
61 cfgword |= (PCI_COMMAND_FAST_BACK | PCI_COMMAND_MASTER);
62 pci_write_config_word(dev, PCI_COMMAND, cfgword);
64 /* Enable both ide interfaces. ROM only enables primary one. */
65 pci_write_config_byte(dev, 0x40, 0xb);
67 /* Set latency timer to reasonable value. */
68 pci_read_config_byte(dev, PCI_LATENCY_TIMER, <);
70 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
71 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
74 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
75 qube_raq_via_bmIDE_fixup);
77 static void qube_raq_galileo_fixup(struct pci_dev *dev)
79 if (dev->devfn != PCI_DEVFN(0, 0))
82 /* Fix PCI latency-timer and cache-line-size values in Galileo
85 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
86 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
89 * The code described by the comment below has been removed
90 * as it causes bus mastering by the Ethernet controllers
91 * to break under any kind of network load. We always set
92 * the retry timeouts to their maximum.
94 * --x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--x--
96 * On all machines prior to Q2, we had the STOP line disconnected
97 * from Galileo to VIA on PCI. The new Galileo does not function
98 * correctly unless we have it connected.
100 * Therefore we must set the disconnect/retry cycle values to
101 * something sensible when using the new Galileo.
104 printk(KERN_INFO "Galileo: revision %u\n", dev->revision);
107 if (dev->revision >= 0x10) {
108 /* New Galileo, assumes PCI stop line to VIA is connected. */
109 GT_WRITE(GT_PCI0_TOR_OFS, 0x4020);
110 } else if (dev->revision == 0x1 || dev->revision == 0x2)
114 /* XXX WE MUST DO THIS ELSE GALILEO LOCKS UP! -DaveM */
115 timeo = GT_READ(GT_PCI0_TOR_OFS);
116 /* Old Galileo, assumes PCI STOP line to VIA is disconnected. */
117 GT_WRITE(GT_PCI0_TOR_OFS,
118 (0xff << 16) | /* retry count */
119 (0xff << 8) | /* timeout 1 */
120 0xff); /* timeout 0 */
122 /* enable PCI retry exceeded interrupt */
123 GT_WRITE(GT_INTRMASK_OFS, GT_INTR_RETRYCTR0_MSK | GT_READ(GT_INTRMASK_OFS));
127 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_GT64111,
128 qube_raq_galileo_fixup);
132 static void qube_raq_via_board_id_fixup(struct pci_dev *dev)
137 retval = pci_read_config_byte(dev, VIA_COBALT_BRD_ID_REG, &id);
139 panic("Cannot read board ID");
143 cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(id);
145 printk(KERN_INFO "Cobalt board ID: %d\n", cobalt_board_id);
148 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0,
149 qube_raq_via_board_id_fixup);
151 static char irq_tab_qube1[] __initdata = {
152 [COBALT_PCICONF_CPU] = 0,
153 [COBALT_PCICONF_ETH0] = QUBE1_ETH0_IRQ,
154 [COBALT_PCICONF_RAQSCSI] = SCSI_IRQ,
155 [COBALT_PCICONF_VIA] = 0,
156 [COBALT_PCICONF_PCISLOT] = PCISLOT_IRQ,
157 [COBALT_PCICONF_ETH1] = 0
160 static char irq_tab_cobalt[] __initdata = {
161 [COBALT_PCICONF_CPU] = 0,
162 [COBALT_PCICONF_ETH0] = ETH0_IRQ,
163 [COBALT_PCICONF_RAQSCSI] = SCSI_IRQ,
164 [COBALT_PCICONF_VIA] = 0,
165 [COBALT_PCICONF_PCISLOT] = PCISLOT_IRQ,
166 [COBALT_PCICONF_ETH1] = ETH1_IRQ
169 static char irq_tab_raq2[] __initdata = {
170 [COBALT_PCICONF_CPU] = 0,
171 [COBALT_PCICONF_ETH0] = ETH0_IRQ,
172 [COBALT_PCICONF_RAQSCSI] = RAQ2_SCSI_IRQ,
173 [COBALT_PCICONF_VIA] = 0,
174 [COBALT_PCICONF_PCISLOT] = PCISLOT_IRQ,
175 [COBALT_PCICONF_ETH1] = ETH1_IRQ
178 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
180 if (cobalt_board_id <= COBALT_BRD_ID_QUBE1)
181 return irq_tab_qube1[slot];
183 if (cobalt_board_id == COBALT_BRD_ID_RAQ2)
184 return irq_tab_raq2[slot];
186 return irq_tab_cobalt[slot];
189 /* Do platform specific device initialization at pci_enable_device() time */
190 int pcibios_plat_dev_init(struct pci_dev *dev)