From 167938e1e7cbca2a1b5e142e72e4dbce750916ee Mon Sep 17 00:00:00 2001
From: Hidetoshi Shimokawa <simokawa@FreeBSD.org>
Date: Fri, 22 Oct 2004 14:56:23 +0000
Subject: - Add FireWire subclass and OHCI interface. - Add some PCI BIOS
 function calls. 	(find_devclass, read_config, write_config)

---
 sys/boot/i386/libi386/biospci.c | 94 +++++++++++++++++++++++++++++++----------
 sys/boot/i386/libi386/libi386.h |  4 ++
 2 files changed, 75 insertions(+), 23 deletions(-)

(limited to 'sys/boot')

diff --git a/sys/boot/i386/libi386/biospci.c b/sys/boot/i386/libi386/biospci.c
index 5717bdc8a480..d844b7ead649 100644
--- a/sys/boot/i386/libi386/biospci.c
+++ b/sys/boot/i386/libi386/biospci.c
@@ -112,6 +112,10 @@ static struct pci_progif progif_parallel[] = {
     {-1,	NULL}
 };
 
+static struct pci_progif progif_firewire[] = {
+    {0x10,	"OHCI"},
+    {-1,	NULL}
+};
 
 struct pci_subclass 
 {
@@ -160,7 +164,7 @@ static struct pci_subclass subclass_comms[] = {
 };
 
 static struct pci_subclass subclass_serial[] = {
-    {0x0,	"Firewire",		progif_null},
+    {0x0,	"FireWire",		progif_firewire},
     {0x1,	"ACCESS.bus",		progif_null},
     {0x2,	"SSA",			progif_null},
     {0x3,	"USB",			progif_null},
@@ -199,7 +203,8 @@ struct pnphandler biospcihandler =
 static void
 biospci_enumerate(void)
 {
-    int			device_index, locator, devid;
+    int			device_index, err;
+    uint32_t		locator, devid;
     struct pci_class	*pc;
     struct pci_subclass *psc;
     struct pci_progif	*ppi;
@@ -231,34 +236,19 @@ biospci_enumerate(void)
 
 		/* Scan for matches */
 		for (device_index = 0; ; device_index++) {
-
 		    /* Look for a match */
-		    v86.ctl = V86_FLAGS;
-		    v86.addr = 0x1a;
-		    v86.eax = 0xb103;
-		    v86.ecx = (pc->pc_class << 16) + (psc->ps_subclass << 8) + ppi->pi_code;
-		    v86.esi = device_index;
-		    v86int();
-		    /* error/end of matches */
-		    if ((v86.efl & 1) || (v86.eax & 0xff00))
+		    err = biospci_find_devclass((pc->pc_class << 16)
+			+ (psc->ps_subclass << 8) + ppi->pi_code,
+			device_index, &locator);
+		    if (err != 0)
 			break;
 
-		    /* Got something */
-		    locator = v86.ebx;
-		    
 		    /* Read the device identifier from the nominated device */
-		    v86.ctl = V86_FLAGS;
-		    v86.addr = 0x1a;
-		    v86.eax = 0xb10a;
-		    v86.ebx = locator;
-		    v86.edi = 0x0;
-		    v86int();
-		    /* error */
-		    if ((v86.efl & 1) || (v86.eax & 0xff00))
+		    err = biospci_read_config(locator, 0, 2, &devid);
+		    if (err != 0)
 			break;
 		    
 		    /* We have the device ID, create a PnP object and save everything */
-		    devid = v86.ecx;
 		    biospci_addinfo(devid, pc, psc, ppi);
 		}
 	    }
@@ -292,3 +282,61 @@ biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struc
     pnp_addident(pi, desc);
     pnp_addinfo(pi);
 }
+
+int
+biospci_find_devclass(uint32_t class, int index, uint32_t *locator)
+{
+	v86.ctl = V86_FLAGS;
+	v86.addr = 0x1a;
+	v86.eax = 0xb103;
+	v86.ecx = class;
+	v86.esi = index;
+	v86int();
+
+	 /* error */
+	if ((v86.efl & 1) || (v86.eax & 0xff00))
+		return (-1);
+
+	*locator = v86.ebx;
+	return (0);
+}
+/*
+ * Configuration space access methods.
+ * width = 0(byte), 1(word) or 2(dword).
+ */
+int
+biospci_write_config(uint32_t locator, int offset, int width, uint32_t val)
+{
+	v86.ctl = V86_FLAGS;
+	v86.addr = 0x1a;
+	v86.eax = 0xb10b + width;
+	v86.ebx = locator;
+	v86.edi = offset;
+	v86.ecx = val;
+	v86int();
+
+	 /* error */
+	if ((v86.efl & 1) || (v86.eax & 0xff00))
+		return (-1);
+
+	return(0);
+}
+
+int
+biospci_read_config(uint32_t locator, int offset, int width, uint32_t *val)
+{
+	v86.ctl = V86_FLAGS;
+	v86.addr = 0x1a;
+	v86.eax = 0xb108 + width;
+	v86.ebx = locator;
+	v86.edi = offset;
+	v86int();
+
+	 /* error */
+	if ((v86.efl & 1) || (v86.eax & 0xff00))
+		return (-1);
+
+	*val = v86.ecx;
+	return (0);
+}
+
diff --git a/sys/boot/i386/libi386/libi386.h b/sys/boot/i386/libi386/libi386.h
index f2696e0a360d..df61b642c881 100644
--- a/sys/boot/i386/libi386/libi386.h
+++ b/sys/boot/i386/libi386/libi386.h
@@ -93,6 +93,10 @@ extern u_int32_t	bios_basemem;				/* base memory in bytes */
 extern u_int32_t	bios_extmem;				/* extended memory in bytes */
 extern vm_offset_t	memtop;
 
+int biospci_find_devclass(uint32_t class, int index);
+int biospci_write_config(uint32_t locator, int offset, int width, int val);
+int biospci_read_config(uint32_t locator, int offset, int width, uint32_t *val);
+
 void	biosacpi_detect();
 
 void	gateA20(void);
-- 
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