Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 169 insertions, 0 deletions

diff --git a/arch/mips/pci/fixup-sni.c b/arch/mips/pci/fixup-sni.c
new file mode 100644
index 0000000000..de012f8bd8
--- /dev/null
+++ b/arch/mips/pci/fixup-sni.c
@@ -0,0 +1,169 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * SNI specific PCI support for RM200/RM300.
+ *
+ * Copyright (C) 1997 - 2000, 2003, 04 Ralf Baechle (ralf@linux-mips.org)
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <asm/mipsregs.h>
+#include <asm/sni.h>
+
+#include <irq.h>
+
+/*
+ * PCIMT Shortcuts ...
+ */
+#define SCSI	PCIMT_IRQ_SCSI
+#define ETH	PCIMT_IRQ_ETHERNET
+#define INTA	PCIMT_IRQ_INTA
+#define INTB	PCIMT_IRQ_INTB
+#define INTC	PCIMT_IRQ_INTC
+#define INTD	PCIMT_IRQ_INTD
+
+/*
+ * Device 0: PCI EISA Bridge	(directly routed)
+ * Device 1: NCR53c810 SCSI	(directly routed)
+ * Device 2: PCnet32 Ethernet	(directly routed)
+ * Device 3: VGA		(routed to INTB)
+ * Device 4: Unused
+ * Device 5: Slot 2
+ * Device 6: Slot 3
+ * Device 7: Slot 4
+ *
+ * Documentation says the VGA is device 5 and device 3 is unused but that
+ * seem to be a documentation error.  At least on my RM200C the Cirrus
+ * Logic CL-GD5434 VGA is device 3.
+ */
+static char irq_tab_rm200[8][5] = {
+	/*	 INTA  INTB  INTC  INTD */
+	{     0,    0,	  0,	0,    0 },	/* EISA bridge */
+	{  SCSI, SCSI, SCSI, SCSI, SCSI },	/* SCSI */
+	{   ETH,  ETH,	ETH,  ETH,  ETH },	/* Ethernet */
+	{  INTB, INTB, INTB, INTB, INTB },	/* VGA */
+	{     0,    0,	  0,	0,    0 },	/* Unused */
+	{     0, INTB, INTC, INTD, INTA },	/* Slot 2 */
+	{     0, INTC, INTD, INTA, INTB },	/* Slot 3 */
+	{     0, INTD, INTA, INTB, INTC },	/* Slot 4 */
+};
+
+/*
+ * In Revision D of the RM300 Device 2 has become a normal purpose Slot 1
+ *
+ * The VGA card is optional for RM300 systems.
+ */
+static char irq_tab_rm300d[8][5] = {
+	/*	 INTA  INTB  INTC  INTD */
+	{     0,    0,	  0,	0,    0 },	/* EISA bridge */
+	{  SCSI, SCSI, SCSI, SCSI, SCSI },	/* SCSI */
+	{     0, INTC, INTD, INTA, INTB },	/* Slot 1 */
+	{  INTB, INTB, INTB, INTB, INTB },	/* VGA */
+	{     0,    0,	  0,	0,    0 },	/* Unused */
+	{     0, INTB, INTC, INTD, INTA },	/* Slot 2 */
+	{     0, INTC, INTD, INTA, INTB },	/* Slot 3 */
+	{     0, INTD, INTA, INTB, INTC },	/* Slot 4 */
+};
+
+static char irq_tab_rm300e[5][5] = {
+	/*	 INTA  INTB  INTC  INTD */
+	{     0,    0,	  0,	0,    0 },	/* HOST bridge */
+	{  SCSI, SCSI, SCSI, SCSI, SCSI },	/* SCSI */
+	{     0, INTC, INTD, INTA, INTB },	/* Bridge/i960 */
+	{     0, INTD, INTA, INTB, INTC },	/* Slot 1 */
+	{     0, INTA, INTB, INTC, INTD },	/* Slot 2 */
+};
+#undef SCSI
+#undef ETH
+#undef INTA
+#undef INTB
+#undef INTC
+#undef INTD
+
+
+/*
+ * PCIT Shortcuts ...
+ */
+#define SCSI0	PCIT_IRQ_SCSI0
+#define SCSI1	PCIT_IRQ_SCSI1
+#define ETH	PCIT_IRQ_ETHERNET
+#define INTA	PCIT_IRQ_INTA
+#define INTB	PCIT_IRQ_INTB
+#define INTC	PCIT_IRQ_INTC
+#define INTD	PCIT_IRQ_INTD
+
+static char irq_tab_pcit[13][5] = {
+	/*	 INTA  INTB  INTC  INTD */
+	{     0,     0,	    0,	   0,	  0 },	/* HOST bridge */
+	{ SCSI0, SCSI0, SCSI0, SCSI0, SCSI0 },	/* SCSI */
+	{ SCSI1, SCSI1, SCSI1, SCSI1, SCSI1 },	/* SCSI */
+	{   ETH,   ETH,	  ETH,	 ETH,	ETH },	/* Ethernet */
+	{     0,  INTA,	 INTB,	INTC,  INTD },	/* PCI-PCI bridge */
+	{     0,     0,	    0,	   0,	  0 },	/* Unused */
+	{     0,     0,	    0,	   0,	  0 },	/* Unused */
+	{     0,     0,	    0,	   0,	  0 },	/* Unused */
+	{     0,  INTA,	 INTB,	INTC,  INTD },	/* Slot 1 */
+	{     0,  INTB,	 INTC,	INTD,  INTA },	/* Slot 2 */
+	{     0,  INTC,	 INTD,	INTA,  INTB },	/* Slot 3 */
+	{     0,  INTD,	 INTA,	INTB,  INTC },	/* Slot 4 */
+	{     0,  INTA,	 INTB,	INTC,  INTD },	/* Slot 5 */
+};
+
+static char irq_tab_pcit_cplus[13][5] = {
+	/*	 INTA  INTB  INTC  INTD */
+	{     0,     0,	    0,	   0,	  0 },	/* HOST bridge */
+	{     0,  INTB,	 INTC,	INTD,  INTA },	/* PCI Slot 9 */
+	{     0,     0,	    0,	   0,	  0 },	/* PCI-EISA */
+	{     0,     0,	    0,	   0,	  0 },	/* Unused */
+	{     0,  INTA,	 INTB,	INTC,  INTD },	/* PCI-PCI bridge */
+	{     0,  INTB,	 INTC,	INTD,  INTA },	/* fixup */
+};
+
+static inline int is_rm300_revd(void)
+{
+	unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR;
+
+	return (csmsr & 0xa0) == 0x20;
+}
+
+int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	switch (sni_brd_type) {
+	case SNI_BRD_PCI_TOWER_CPLUS:
+		if (slot == 4) {
+			/*
+			 * SNI messed up interrupt wiring for onboard
+			 * PCI bus 1; we need to fix this up here
+			 */
+			while (dev && dev->bus->number != 1)
+				dev = dev->bus->self;
+			if (dev && dev->devfn >= PCI_DEVFN(4, 0))
+				slot = 5;
+		}
+		return irq_tab_pcit_cplus[slot][pin];
+	case SNI_BRD_PCI_TOWER:
+		return irq_tab_pcit[slot][pin];
+
+	case SNI_BRD_PCI_MTOWER:
+		if (is_rm300_revd())
+			return irq_tab_rm300d[slot][pin];
+		fallthrough;
+	case SNI_BRD_PCI_DESKTOP:
+		return irq_tab_rm200[slot][pin];
+
+	case SNI_BRD_PCI_MTOWER_CPLUS:
+		return irq_tab_rm300e[slot][pin];
+	}
+
+	return 0;
+}
+
+/* Do platform specific device initialization at pci_enable_device() time */
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+	return 0;
+}