patch-2.3.30 linux/arch/alpha/kernel/core_irongate.c

• Lines: 354
• Date: Sat Nov 27 15:42:54 1999
• Orig file: v2.3.29/linux/arch/alpha/kernel/core_irongate.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.29/linux/arch/alpha/kernel/core_irongate.c linux/arch/alpha/kernel/core_irongate.c
@@ -0,0 +1,353 @@
+/*
+ *	linux/arch/alpha/kernel/core_irongate.c
+ *
+ * Based on code written by David A. Rusling (david.rusling@reo.mts.dec.com).
+ *
+ *	Copyright (C) 1999 Alpha Processor, Inc.,
+ *		(David Daniel, Stig Telfer, Soohoon Lee)
+ *
+ * Code common to all IRONGATE core logic chips.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/pci.h>
+#include <asm/hwrpb.h>
+
+#define __EXTERN_INLINE inline
+#include <asm/io.h>
+#include <asm/core_irongate.h>
+#undef __EXTERN_INLINE
+
+#include "proto.h"
+#include "pci_impl.h"
+
+
+/*
+ * NOTE: Herein lie back-to-back mb instructions.  They are magic.
+ * One plausible explanation is that the I/O controller does not properly
+ * handle the system transaction.  Another involves timing.  Ho hum.
+ */
+
+/*
+ * BIOS32-style PCI interface:
+ */
+
+#define DEBUG_CONFIG 0
+
+#if DEBUG_CONFIG
+# define DBG_CFG(args)	printk args
+#else
+# define DBG_CFG(args)
+#endif
+
+
+/*
+ * Given a bus, device, and function number, compute resulting
+ * configuration space address accordingly.  It is therefore not safe
+ * to have concurrent invocations to configuration space access
+ * routines, but there really shouldn't be any need for this.
+ *
+ *	addr[31:24]		reserved
+ *	addr[23:16]		bus number (8 bits = 128 possible buses)
+ *	addr[15:11]		Device number (5 bits)
+ *	addr[10: 8]		function number
+ *	addr[ 7: 2]		register number
+ *
+ * For IRONGATE:
+ *    if (bus = addr[23:16]) == 0
+ *    then
+ *	  type 0 config cycle:
+ *	      addr_on_pci[31:11] = id selection for device = addr[15:11]
+ *	      addr_on_pci[10: 2] = addr[10: 2] ???
+ *	      addr_on_pci[ 1: 0] = 00
+ *    else
+ *	  type 1 config cycle (pass on with no decoding):
+ *	      addr_on_pci[31:24] = 0
+ *	      addr_on_pci[23: 2] = addr[23: 2]
+ *	      addr_on_pci[ 1: 0] = 01
+ *    fi
+ *
+ * Notes:
+ *	The function number selects which function of a multi-function device
+ *	(e.g., SCSI and Ethernet).
+ *
+ *	The register selects a DWORD (32 bit) register offset.	Hence it
+ *	doesn't get shifted by 2 bits as we want to "drop" the bottom two
+ *	bits.
+ */
+
+static int
+mk_conf_addr(struct pci_dev *dev, int where, unsigned long *pci_addr,
+	     unsigned char *type1)
+{
+	unsigned long addr;
+	u8 bus = dev->bus->number;
+	u8 device_fn = dev->devfn;
+
+	DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
+		 "pci_addr=0x%p, type1=0x%p)\n",
+		 bus, device_fn, where, pci_addr, type1));
+
+	*type1 = (bus != 0);
+
+	addr = (bus << 16) | (device_fn << 8) | where;
+	addr |= IRONGATE_CONF;
+
+	*pci_addr = addr;
+	DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
+	return 0;
+}
+
+static int
+irongate_read_config_byte(struct pci_dev *dev, int where, u8 *value)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(dev, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	*value = __kernel_ldbu(*(vucp)addr);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+irongate_read_config_word(struct pci_dev *dev, int where, u16 *value)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(dev, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	*value = __kernel_ldwu(*(vusp)addr);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+irongate_read_config_dword(struct pci_dev *dev, int where, u32 *value)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(dev, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	*value = *(vuip)addr;
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+irongate_write_config_byte(struct pci_dev *dev, int where, u8 value)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(dev, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	__kernel_stb(value, *(vucp)addr);
+	mb();
+	__kernel_ldbu(*(vucp)addr);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+irongate_write_config_word(struct pci_dev *dev, int where, u16 value)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(dev, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	__kernel_stw(value, *(vusp)addr);
+	mb();
+	__kernel_ldwu(*(vusp)addr);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+irongate_write_config_dword(struct pci_dev *dev, int where, u32 value)
+{
+	unsigned long addr;
+	unsigned char type1;
+
+	if (mk_conf_addr(dev, where, &addr, &type1))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	*(vuip)addr = value;
+	mb();
+	*(vuip)addr;
+	return PCIBIOS_SUCCESSFUL;
+}
+
+
+struct pci_ops irongate_pci_ops =
+{
+	read_byte:	irongate_read_config_byte,
+	read_word:	irongate_read_config_word,
+	read_dword:	irongate_read_config_dword,
+	write_byte:	irongate_write_config_byte,
+	write_word:	irongate_write_config_word,
+	write_dword:	irongate_write_config_dword
+};
+
+#if 0
+static void
+irongate_register_dump(const char *function_name)
+{
+	printk("%s: Irongate registers:\n"
+	       "\tdev_vendor\t0x%08x\n"
+	       "\tstat_cmd\t0x%08x\n"
+	       "\tclass\t\t0x%08x\n"
+	       "\tlatency\t\t0x%08x\n"
+	       "\tbar0\t\t0x%08x\n"
+	       "\tbar1\t\t0x%08x\n"
+	       "\tbar2\t\t0x%08x\n"
+	       "\trsrvd0[0]\t0x%08x\n"
+	       "\trsrvd0[1]\t0x%08x\n"
+	       "\trsrvd0[2]\t0x%08x\n"
+	       "\trsrvd0[3]\t0x%08x\n"
+	       "\trsrvd0[4]\t0x%08x\n"
+	       "\trsrvd0[5]\t0x%08x\n"
+	       "\tcapptr\t\t0x%08x\n"
+	       "\trsrvd1[0]\t0x%08x\n"
+	       "\trsrvd1[1]\t0x%08x\n"
+	       "\tbacsr10\t\t0x%08x\n"
+	       "\tbacsr32\t\t0x%08x\n"
+	       "\tbacsr54\t\t0x%08x\n"
+	       "\trsrvd2[0]\t0x%08x\n"
+	       "\tdrammap\t\t0x%08x\n"
+	       "\tdramtm\t\t0x%08x\n"
+	       "\tdramms\t\t0x%08x\n"
+	       "\trsrvd3[0]\t0x%08x\n"
+	       "\tbiu0\t\t0x%08x\n"
+	       "\tbiusip\t\t0x%08x\n"
+	       "\trsrvd4[0]\t0x%08x\n"
+	       "\trsrvd4[1]\t0x%08x\n"
+	       "\tmro\t\t0x%08x\n"
+	       "\trsrvd5[0]\t0x%08x\n"
+	       "\trsrvd5[1]\t0x%08x\n"
+	       "\trsrvd5[2]\t0x%08x\n"
+	       "\twhami\t\t0x%08x\n"
+	       "\tpciarb\t\t0x%08x\n"
+	       "\tpcicfg\t\t0x%08x\n"
+	       "\trsrvd6[0]\t0x%08x\n"
+	       "\trsrvd6[1]\t0x%08x\n"
+	       "\trsrvd6[2]\t0x%08x\n"
+	       "\trsrvd6[3]\t0x%08x\n"
+	       "\trsrvd6[4]\t0x%08x\n"
+	       "\tagpcap\t\t0x%08x\n"
+	       "\tagpstat\t\t0x%08x\n"
+	       "\tagpcmd\t\t0x%08x\n"
+	       "\tagpva\t\t0x%08x\n"
+	       "\tagpmode\t\t0x%08x\n",
+	       function_name,
+	       IRONGATE0->dev_vendor,
+	       IRONGATE0->stat_cmd,
+	       IRONGATE0->class,
+	       IRONGATE0->latency,
+	       IRONGATE0->bar0,
+	       IRONGATE0->bar1,
+	       IRONGATE0->bar2,
+	       IRONGATE0->rsrvd0[0],
+	       IRONGATE0->rsrvd0[1],
+	       IRONGATE0->rsrvd0[2],
+	       IRONGATE0->rsrvd0[3],
+	       IRONGATE0->rsrvd0[4],
+	       IRONGATE0->rsrvd0[5],
+	       IRONGATE0->capptr,
+	       IRONGATE0->rsrvd1[0],
+	       IRONGATE0->rsrvd1[1],
+	       IRONGATE0->bacsr10,
+	       IRONGATE0->bacsr32,
+	       IRONGATE0->bacsr54,
+	       IRONGATE0->rsrvd2[0],
+	       IRONGATE0->drammap,
+	       IRONGATE0->dramtm,
+	       IRONGATE0->dramms,
+	       IRONGATE0->rsrvd3[0],
+	       IRONGATE0->biu0,
+	       IRONGATE0->biusip,
+	       IRONGATE0->rsrvd4[0],
+	       IRONGATE0->rsrvd4[1],
+	       IRONGATE0->mro,
+	       IRONGATE0->rsrvd5[0],
+	       IRONGATE0->rsrvd5[1],
+	       IRONGATE0->rsrvd5[2],
+	       IRONGATE0->whami,
+	       IRONGATE0->pciarb,
+	       IRONGATE0->pcicfg,
+	       IRONGATE0->rsrvd6[0],
+	       IRONGATE0->rsrvd6[1],
+	       IRONGATE0->rsrvd6[2],
+	       IRONGATE0->rsrvd6[3],
+	       IRONGATE0->rsrvd6[4],
+	       IRONGATE0->agpcap,
+	       IRONGATE0->agpstat,
+	       IRONGATE0->agpcmd,
+	       IRONGATE0->agpva,
+	       IRONGATE0->agpmode);
+}
+#else
+#define irongate_register_dump(x)
+#endif
+
+int
+irongate_pci_clr_err(void)
+{
+	unsigned int nmi_ctl=0;
+	unsigned int IRONGATE_jd;
+
+again:
+	IRONGATE_jd = IRONGATE0->stat_cmd;
+	printk("Iron stat_cmd %x\n", IRONGATE_jd);
+	IRONGATE0->stat_cmd = IRONGATE_jd; /* write again clears error bits */
+	mb();
+	IRONGATE_jd = IRONGATE0->stat_cmd;  /* re-read to force write */
+
+	IRONGATE_jd = IRONGATE0->dramms;
+	printk("Iron dramms %x\n", IRONGATE_jd);
+	IRONGATE0->dramms = IRONGATE_jd; /* write again clears error bits */
+	mb();
+	IRONGATE_jd = IRONGATE0->dramms;  /* re-read to force write */
+
+	/* Clear ALI NMI */
+        nmi_ctl = inb(0x61);
+        nmi_ctl |= 0x0c;
+        outb(nmi_ctl, 0x61);
+        nmi_ctl &= ~0x0c;
+        outb(nmi_ctl, 0x61);
+
+	IRONGATE_jd = IRONGATE0->dramms;
+	if (IRONGATE_jd & 0x300) goto again;
+
+	return 0;
+}
+
+void __init
+irongate_init_arch(void)
+{
+	struct pci_controler *hose;
+
+	irongate_pci_clr_err();
+	irongate_register_dump(__FUNCTION__);
+
+	/*
+	 * Create our single hose.
+	 */
+
+	hose = alloc_pci_controler();
+	hose->io_space = &ioport_resource;
+	hose->mem_space = &iomem_resource;
+	hose->config_space = IRONGATE_CONF;
+	hose->index = 0;
+}