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authorarch import user (historical) <svn@openbios.org>2005-07-06 17:15:48 +0000
committerarch import user (historical) <svn@openbios.org>2005-07-06 17:15:48 +0000
commitacfaeceffd8b97715905f074a76e0d12f0d83889 (patch)
tree4a7c4b12a2dff67225cc39e0f47c4d0eac84979b /src/southbridge/via
parent9c3f37cb5f741d7b2ba7852a16ffb82ee40968e9 (diff)
Revision: linuxbios@linuxbios.org--devel/freebios--devel--2.0--patch-36
Creator: Li-Ta Lo <ollie@lanl.gov> emulator update Correction to the reduce emulator from Paulo git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1952 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/via')
-rw-r--r--src/southbridge/via/vt8231/Config.lb8
-rw-r--r--src/southbridge/via/vt8231/chip.h10
-rw-r--r--src/southbridge/via/vt8231/vt8231.c450
-rw-r--r--src/southbridge/via/vt8231/vt8231_early_smbus.c260
4 files changed, 176 insertions, 552 deletions
diff --git a/src/southbridge/via/vt8231/Config.lb b/src/southbridge/via/vt8231/Config.lb
index b0b2ef5abf..46b4e26129 100644
--- a/src/southbridge/via/vt8231/Config.lb
+++ b/src/southbridge/via/vt8231/Config.lb
@@ -1,2 +1,8 @@
config chip.h
-object vt8231.o
+driver vt8231.o
+driver vt8231_lpc.o
+driver vt8231_acpi.o
+driver vt8231_ide.o
+driver vt8231_nic.o
+#driver vt8231_usb.o
+
diff --git a/src/southbridge/via/vt8231/chip.h b/src/southbridge/via/vt8231/chip.h
index bc1e445f26..fef4e2913b 100644
--- a/src/southbridge/via/vt8231/chip.h
+++ b/src/southbridge/via/vt8231/chip.h
@@ -4,18 +4,10 @@
extern struct chip_operations southbridge_via_vt8231_ops;
struct southbridge_via_vt8231_config {
- /* PCI function enables */
- /* i.e. so that pci scan bus will find them. */
- /* I am putting in IDE as an example but obviously this needs
- * to be more complete!
- */
- int enable_ide;
- /* enables of functions of devices */
- int enable_usb;
+ /* enables of Non-PCI devices */
int enable_native_ide;
int enable_com_ports;
int enable_keyboard;
- int enable_nvram;
};
#endif /* _SOUTHBRIDGE_VIA_VT8231 */
diff --git a/src/southbridge/via/vt8231/vt8231.c b/src/southbridge/via/vt8231/vt8231.c
index d78bb2cf86..514d0c0626 100644
--- a/src/southbridge/via/vt8231/vt8231.c
+++ b/src/southbridge/via/vt8231/vt8231.c
@@ -1,441 +1,73 @@
-
-#include <arch/io.h>
+#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
-#include <console/console.h>
+
+#include <pc80/mc146818rtc.h>
+#include <pc80/keyboard.h>
+
#include "vt8231.h"
#include "chip.h"
-void pc_keyboard_init(void);
+/* Base 8231 controller */
+static device_t lpc_dev;
-void hard_reset(void)
+void hard_reset(void)
{
- printk_err("NO HARD RESET ON VT8231! FIX ME!\n");
-}
-
-static void usb_on(int enable)
-{
- unsigned char regval;
-
- /* Base 8231 controller */
- device_t dev0 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, 0);
- /* USB controller 1 */
- device_t dev2 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2, 0);
- /* USB controller 2 */
- device_t dev3 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2, dev2);
-
- /* enable USB1 */
- if(dev2) {
- if (enable) {
- pci_write_config8(dev2, 0x3c, 0x05);
- pci_write_config8(dev2, 0x04, 0x07);
- } else {
- pci_write_config8(dev2, 0x3c, 0x00);
- pci_write_config8(dev2, 0x04, 0x00);
- }
- }
-
- if(dev0) {
- regval = pci_read_config8(dev0, 0x50);
- if (enable)
- regval &= ~(0x10);
- else
- regval |= 0x10;
- pci_write_config8(dev0, 0x50, regval);
- }
-
- /* enable USB2 */
- if(dev3) {
- if (enable) {
- pci_write_config8(dev3, 0x3c, 0x05);
- pci_write_config8(dev3, 0x04, 0x07);
- } else {
- pci_write_config8(dev3, 0x3c, 0x00);
- pci_write_config8(dev3, 0x04, 0x00);
- }
- }
-
- if(dev0) {
- regval = pci_read_config8(dev0, 0x50);
- if (enable)
- regval &= ~(0x20);
- else
- regval |= 0x20;
- pci_write_config8(dev0, 0x50, regval);
- }
+ printk_err("NO HARD RESET ON VT8231! FIX ME!\n");
}
static void keyboard_on(void)
{
unsigned char regval;
-
- /* Base 8231 controller */
- device_t dev0 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, 0);
-
- /* kevinh/Ispiri - update entire function to use
- new pci_write_config8 */
- if (dev0) {
- regval = pci_read_config8(dev0, 0x51);
+ if (lpc_dev) {
+ regval = pci_read_config8(lpc_dev, 0x51);
regval |= 0x0f;
- pci_write_config8(dev0, 0x51, regval);
+ pci_write_config8(lpc_dev, 0x51, regval);
}
init_pc_keyboard(0x60, 0x64, 0);
}
-static void nvram_on(void)
+static void com_port_on(void)
{
- /*
- * the VIA 8231 South has a very different nvram setup than the
- * piix4e ...
- * turn on ProMedia nvram.
- * TO DO: use the PciWriteByte function here.
- */
-
- /*
- * kevinh/Ispiri - I don't think this is the correct address/value
- * intel_conf_writeb(0x80008841, 0xFF);
+#if 0
+ // enable com1 and com2.
+ enables = pci_read_config8(dev, 0x6e);
+
+ /* 0x80 is enable com port b, 0x10 is to make it com2, 0x8
+ * is enable com port a as com1 kevinh/Ispiri - Old code
+ * thought 0x01 would make it com1, that was wrong enables =
+ * 0x80 | 0x10 | 0x8 ; pci_write_config8(dev, 0x6e,
+ * enables); // note: this is also a redo of some port of
+ * assembly, but we want everything up.
*/
-}
-
-/*
- * Enable the ethernet device and turn off stepping (because it is integrated
- * inside the southbridge)
- */
-static void ethernet_fixup()
-{
- device_t edev;
- uint8_t byte;
-
- printk_info("Ethernet fixup\n");
-
- edev = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_7, 0);
- if (edev) {
- printk_debug("Configuring VIA LAN\n");
-
- /* We don't need stepping - though the device supports it */
- byte = pci_read_config8(edev, PCI_COMMAND);
- byte &= ~PCI_COMMAND_WAIT;
- pci_write_config8(edev, PCI_COMMAND, byte);
- } else {
- printk_debug("VIA LAN not found\n");
- }
-}
-
-
-/* we need to do things in this function so that PCI scan will find
- * them. One problem here is that we can't use ANY of the new device
- * stuff. This work here precedes all that.
- * Fundamental problem with linuxbios V2 architecture.
- * You can't do pci control in the C code without having done a PCI scan.
- * But in some cases you need to to pci control in the c code before doing
- * a PCI scan. But you can't use arch/romcc_io.h (the code you need) because
- * that has functions with the same name but different type signatures
- * (e.g. device_t). This needs to get fixed. We need low-level pci scans
- * in the C code.
- */
-static void vt8231_pci_enable(struct southbridge_via_vt8231_config *conf)
-{
- /*
- unsigned long busdevfn = 0x8000;
- if (conf->enable_ide) {
- printk_debug("%s: enabling IDE function\n", __FUNCTION__);
- }
- */
-}
-
-/* PIRQ init
- */
-void pci_assign_irqs(unsigned bus, unsigned slot, const unsigned char pIntAtoD[4]);
-
-
-static const unsigned char southbridgeIrqs[4] = { 11, 5, 10, 12 };
-static const unsigned char enetIrqs[4] = { 11, 5, 10, 12 };
-static const unsigned char slotIrqs[4] = { 5, 10, 12, 11 };
-
-/*
- Our IDSEL mappings are as follows
- PCI slot is AD31 (device 15) (00:14.0)
- Southbridge is AD28 (device 12) (00:11.0)
-*/
-static void pci_routing_fixup(struct device *dev)
-{
-
- printk_info("%s: dev is %p\n", __FUNCTION__, dev);
- if (dev) {
- /* initialize PCI interupts - these assignments depend
- on the PCB routing of PINTA-D
-
- PINTA = IRQ11
- PINTB = IRQ5
- PINTC = IRQ10
- PINTD = IRQ12
- */
- pci_write_config8(dev, 0x55, 0xb0);
- pci_write_config8(dev, 0x56, 0xa5);
- pci_write_config8(dev, 0x57, 0xc0);
- }
-
- // Standard southbridge components
- printk_info("setting southbridge\n");
- pci_assign_irqs(0, 0x11, southbridgeIrqs);
-
- // Ethernet built into southbridge
- printk_info("setting ethernet\n");
- pci_assign_irqs(0, 0x12, enetIrqs);
-
- // PCI slot
- printk_info("setting pci slot\n");
- pci_assign_irqs(0, 0x14, slotIrqs);
- printk_info("%s: DONE\n", __FUNCTION__);
-}
-
-
-void
-dump_south(void)
-{
- device_t dev0;
- dev0 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, 0);
- int i,j;
-
- for(i = 0; i < 256; i += 16) {
- printk_debug("0x%x: ", i);
- for(j = 0; j < 16; j++) {
- printk_debug("%02x ", pci_read_config8(dev0, i+j));
- }
- printk_debug("\n");
- }
+ /* set com1 to 115 kbaud not clear how to do this yet.
+ * forget it; done in assembly.
+ */
+#endif
}
-static void vt8231_init(struct southbridge_via_vt8231_config *conf)
+/* FixME: to be removed ? */
+static void vt8231_enable(struct device *dev)
{
- unsigned char enables;
- device_t dev0;
- device_t dev1;
- device_t devpwr;
-
- // to do: use the pcibios_find function here, instead of
- // hard coding the devfn.
- // done - kevinh/Ispiri
- printk_debug("vt8231 init\n");
- /* Base 8231 controller */
- dev0 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, 0);
- /* IDE controller */
- dev1 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, 0);
- /* Power management controller */
- devpwr = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4, 0);
-
- // enable the internal I/O decode
- enables = pci_read_config8(dev0, 0x6C);
- enables |= 0x80;
- pci_write_config8(dev0, 0x6C, enables);
-
- // Map 4MB of FLASH into the address space
- pci_write_config8(dev0, 0x41, 0x7f);
-
- // Set bit 6 of 0x40, because Award does it (IO recovery time)
- // IMPORTANT FIX - EISA 0x4d0 decoding must be on so that PCI
- // interrupts can be properly marked as level triggered.
- enables = pci_read_config8(dev0, 0x40);
- pci_write_config8(dev0, 0x40, enables);
-
- // Set 0x42 to 0xf0 to match Award bios
- enables = pci_read_config8(dev0, 0x42);
- enables |= 0xf0;
- pci_write_config8(dev0, 0x42, enables);
-
- // Set bit 3 of 0x4a, to match award (dummy pci request)
- enables = pci_read_config8(dev0, 0x4a);
- enables |= 0x08;
- pci_write_config8(dev0, 0x4a, enables);
-
- // Set bit 3 of 0x4f to match award (use INIT# as cpu reset)
- enables = pci_read_config8(dev0, 0x4f);
- enables |= 0x08;
- pci_write_config8(dev0, 0x4f, enables);
-
- // Set 0x58 to 0x03 to match Award
- pci_write_config8(dev0, 0x58, 0x03);
-
- // enable the ethernet/RTC
- if(dev0) {
- enables = pci_read_config8(dev0, 0x51);
- enables |= 0x18;
- pci_write_config8(dev0, 0x51, enables);
+ struct southbridge_via_vt8231_config *conf = dev->chip_info;
+
+ if (!lpc_dev) {
+ /* the first time called, enable devices not on PCI bus
+ * FIXME: is that device struct there yet? */
+ lpc_dev = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_8231, 0);
+ if (conf->enable_keyboard)
+ keyboard_on();
+ if (conf->enable_com_ports)
+ com_port_on();
}
-
-
- // enable com1 and com2.
- if (conf->enable_com_ports) {
- enables = pci_read_config8(dev0, 0x6e);
-
- /* 0x80 is enable com port b, 0x10 is to make it com2, 0x8
- * is enable com port a as com1 kevinh/Ispiri - Old code
- * thought 0x01 would make it com1, that was wrong enables =
- * 0x80 | 0x10 | 0x8 ; pci_write_config8(dev0, 0x6e,
- * enables); // note: this is also a redo of some port of
- * assembly, but we want everything up.
- */
-
- /* set com1 to 115 kbaud not clear how to do this yet.
- * forget it; done in assembly.
- */
-
- }
- // enable IDE, since Linux won't do it.
- // First do some more things to devfn (17,0)
- // note: this should already be cleared, according to the book.
- enables = pci_read_config8(dev0, 0x50);
- printk_debug("IDE enable in reg. 50 is 0x%x\n", enables);
- enables &= ~8; // need manifest constant here!
- printk_debug("set IDE reg. 50 to 0x%x\n", enables);
- pci_write_config8(dev0, 0x50, enables);
-
- // set default interrupt values (IDE)
- enables = pci_read_config8(dev0, 0x4c);
- printk_debug("IRQs in reg. 4c are 0x%x\n", enables & 0xf);
- // clear out whatever was there.
- enables &= ~0xf;
- enables |= 4;
- printk_debug("setting reg. 4c to 0x%x\n", enables);
- pci_write_config8(dev0, 0x4c, enables);
-
- // set up the serial port interrupts.
- // com2 to 3, com1 to 4
- pci_write_config8(dev0, 0x46, 0x04);
- pci_write_config8(dev0, 0x47, 0x03);
- pci_write_config8(dev0, 0x6e, 0x98);
- //
- // Power management setup
- //
- // Set ACPI base address to IO 0x4000
- pci_write_config32(devpwr, 0x48, 0x4001);
-
- // Enable ACPI access (and setup like award)
- pci_write_config8(devpwr, 0x41, 0x84);
-
- // Set hardware monitor base address to IO 0x6000
- pci_write_config32(devpwr, 0x70, 0x6001);
-
- // Enable hardware monitor (and setup like award)
- pci_write_config8(devpwr, 0x74, 0x01);
-
- // set IO base address to 0x5000
- pci_write_config32(devpwr, 0x90, 0x5001);
-
- // Enable SMBus
- pci_write_config8(devpwr, 0xd2, 0x01);
-
- //
- // IDE setup
- //
- if (! conf->enable_native_ide) {
- // Run the IDE controller in 'compatiblity mode - i.e. don't use PCI
- // interrupts. Using PCI ints confuses linux for some reason.
-
- printk_info("%s: enabling compatibility IDE addresses\n", __FUNCTION__);
- enables = pci_read_config8(dev1, 0x42);
- printk_debug("enables in reg 0x42 0x%x\n", enables);
- enables &= ~0xc0; // compatability mode
- pci_write_config8(dev1, 0x42, enables);
- enables = pci_read_config8(dev1, 0x42);
- printk_debug("enables in reg 0x42 read back as 0x%x\n", enables);
- }
-
- enables = pci_read_config8(dev1, 0x40);
- printk_debug("enables in reg 0x40 0x%x\n", enables);
- enables |= 3;
- pci_write_config8(dev1, 0x40, enables);
- enables = pci_read_config8(dev1, 0x40);
- printk_debug("enables in reg 0x40 read back as 0x%x\n", enables);
-
- // Enable prefetch buffers
- enables = pci_read_config8(dev1, 0x41);
- enables |= 0xf0;
- pci_write_config8(dev1, 0x41, enables);
-
- // Lower thresholds (cause award does it)
- enables = pci_read_config8(dev1, 0x43);
- enables &= ~0x0f;
- enables |= 0x05;
- pci_write_config8(dev1, 0x43, enables);
-
- // PIO read prefetch counter (cause award does it)
- pci_write_config8(dev1, 0x44, 0x18);
-
- // Use memory read multiple
- pci_write_config8(dev1, 0x45, 0x1c);
-
- // address decoding.
- // we want "flexible", i.e. 1f0-1f7 etc. or native PCI
- // kevinh@ispiri.com - the standard linux drivers seem ass slow when
- // used in native mode - I've changed back to classic
- enables = pci_read_config8(dev1, 0x9);
- printk_debug("enables in reg 0x9 0x%x\n", enables);
- // by the book, set the low-order nibble to 0xa.
- if (conf->enable_native_ide) {
- enables &= ~0xf;
- // cf/cg silicon needs an 'f' here.
- enables |= 0xf;
- } else {
- enables &= ~0x5;
- }
-
- pci_write_config8(dev1, 0x9, enables);
- enables = pci_read_config8(dev1, 0x9);
- printk_debug("enables in reg 0x9 read back as 0x%x\n", enables);
-
- // standard bios sets master bit.
- enables = pci_read_config8(dev1, 0x4);
- printk_debug("command in reg 0x4 0x%x\n", enables);
- enables |= 7;
-
- // No need for stepping - kevinh@ispiri.com
- enables &= ~0x80;
-
- pci_write_config8(dev1, 0x4, enables);
- enables = pci_read_config8(dev1, 0x4);
- printk_debug("command in reg 0x4 reads back as 0x%x\n", enables);
-
- if (! conf->enable_native_ide) {
- // Use compatability mode - per award bios
- pci_write_config32(dev1, 0x10, 0x0);
- pci_write_config32(dev1, 0x14, 0x0);
- pci_write_config32(dev1, 0x18, 0x0);
- pci_write_config32(dev1, 0x1c, 0x0);
-
- // Force interrupts to use compat mode - just like Award bios
- pci_write_config8(dev1, 0x3d, 00);
- pci_write_config8(dev1, 0x3c, 0xff);
- }
-
-
- /* set up isa bus -- i/o recovery time, rom write enable, extend-ale */
- pci_write_config8(dev0, 0x40, 0x54);
- ethernet_fixup();
-
- // Start the rtc
- rtc_init(0);
-}
-
-static void southbridge_init(struct device *dev) {
- vt8231_init(dev->chip_info);
- pci_routing_fixup(dev);
-}
-
-struct device_operations vt8231_dev_ops = {
- .init = &southbridge_init,
-};
-
-static void southbridge_enable(struct device *dev)
-{
- dev->ops = &vt8231_dev_ops;
}
struct chip_operations southbridge_via_vt8231_ops = {
CHIP_NAME("VIA vt8231")
- .enable_dev = southbridge_enable,
+ .enable_dev = vt8231_enable,
};
diff --git a/src/southbridge/via/vt8231/vt8231_early_smbus.c b/src/southbridge/via/vt8231/vt8231_early_smbus.c
index 056c4b5b11..dbb6e213ae 100644
--- a/src/southbridge/via/vt8231/vt8231_early_smbus.c
+++ b/src/southbridge/via/vt8231/vt8231_early_smbus.c
@@ -12,12 +12,12 @@
#define SMBTRNSADD 0x9
#define SMBSLVDATA 0xa
#define SMLINK_PIN_CTL 0xe
-#define SMBUS_PIN_CTL 0xf
+#define SMBUS_PIN_CTL 0xf
/* Define register settings */
#define HOST_RESET 0xff
-#define DIMM_BASE 0xa0 // 1010000 is base for DIMM in SMBus
-#define READ_CMD 0x01 // 1 in the 0 bit of SMBHSTADD states to READ
+#define DIMM_BASE 0xa0 // 1010000 is base for DIMM in SMBus
+#define READ_CMD 0x01 // 1 in the 0 bit of SMBHSTADD states to READ
#define SMBUS_TIMEOUT (100*1000*10)
@@ -27,29 +27,28 @@ static void enable_smbus(void)
device_t dev;
unsigned char c;
/* Power management controller */
- dev = pci_locate_device(PCI_ID(0x1106,0x8235), 0);
-
+ dev = pci_locate_device(PCI_ID(0x1106, 0x8235), 0);
+
if (dev == PCI_DEV_INVALID) {
die("SMBUS controller not found\r\n");
}
-
// set IO base address to SMBUS_IO_BASE
- pci_write_config32(dev, 0x90, SMBUS_IO_BASE|1);
-
+ pci_write_config32(dev, 0x90, SMBUS_IO_BASE | 1);
+
// Enable SMBus
c = pci_read_config8(dev, 0xd2);
c |= 5;
pci_write_config8(dev, 0xd2, c);
-
+
/* make it work for I/O ...
*/
- dev = pci_locate_device(PCI_ID(0x1106,0x8231), 0);
+ dev = pci_locate_device(PCI_ID(0x1106, 0x8231), 0);
c = pci_read_config8(dev, 4);
c |= 1;
pci_write_config8(dev, 4, c);
print_debug_hex8(c);
print_debug(" is the comm register\r\n");
-
+
print_debug("SMBus controller enabled\r\n");
}
@@ -61,52 +60,51 @@ static inline void smbus_delay(void)
static int smbus_wait_until_active(void)
{
- unsigned long loops;
- loops = SMBUS_TIMEOUT;
- do {
- unsigned char val;
- smbus_delay();
- val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
- if ((val & 1)) {
- break;
- }
- } while(--loops);
- return loops?0:-4;
+ unsigned long loops;
+ loops = SMBUS_TIMEOUT;
+ do {
+ unsigned char val;
+ smbus_delay();
+ val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
+ if ((val & 1)) {
+ break;
+ }
+ } while (--loops);
+ return loops ? 0 : -4;
}
static int smbus_wait_until_ready(void)
{
- unsigned long loops;
- loops = SMBUS_TIMEOUT;
- do {
- unsigned char val;
- smbus_delay();
- val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
- if ((val & 1) == 0) {
- break;
- }
- if(loops == (SMBUS_TIMEOUT / 2)) {
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT),
- SMBUS_IO_BASE + SMBHSTSTAT);
- }
- } while(--loops);
- return loops?0:-2;
+ unsigned long loops;
+ loops = SMBUS_TIMEOUT;
+ do {
+ unsigned char val;
+ smbus_delay();
+ val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
+ if ((val & 1) == 0) {
+ break;
+ }
+ if (loops == (SMBUS_TIMEOUT / 2)) {
+ outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
+ }
+ } while (--loops);
+ return loops ? 0 : -2;
}
static int smbus_wait_until_done(void)
{
- unsigned long loops;
- loops = SMBUS_TIMEOUT;
- do {
- unsigned char val;
- smbus_delay();
-
- val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
- if ( (val & 1) == 0) {
- break;
- }
- } while(--loops);
- return loops?0:-3;
+ unsigned long loops;
+ loops = SMBUS_TIMEOUT;
+ do {
+ unsigned char val;
+ smbus_delay();
+
+ val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
+ if ((val & 1) == 0) {
+ break;
+ }
+ } while (--loops);
+ return loops ? 0 : -3;
}
void smbus_reset(void)
@@ -115,13 +113,13 @@ void smbus_reset(void)
outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
-
+
smbus_wait_until_ready();
print_debug("After reset status ");
- print_debug_hex8( inb(SMBUS_IO_BASE + SMBHSTSTAT));
+ print_debug_hex8(inb(SMBUS_IO_BASE + SMBHSTSTAT));
print_debug("\r\n");
}
-
+
static void smbus_print_error(unsigned char host_status_register)
{
@@ -152,96 +150,95 @@ static void smbus_print_error(unsigned char host_status_register)
*/
static int smbus_read_byte(unsigned device, unsigned address)
{
- unsigned char global_control_register;
- unsigned char global_status_register;
- unsigned char byte;
-
- if (smbus_wait_until_ready() < 0) {
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
- if ( smbus_wait_until_ready() < 0 ) {
- return -2;
- }
- }
-
- /* setup transaction */
- /* disable interrupts */
- outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xfe, SMBUS_IO_BASE + SMBHSTCTL);
- /* set the device I'm talking too */
- outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBXMITADD);
- /* set the command/address... */
- outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
- /* set up for a byte data read */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xe3) | (0x2<<2), SMBUS_IO_BASE + SMBHSTCTL);
-
- /* clear any lingering errors, so the transaction will run */
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
-
- /* clear the data byte...*/
- outb(0, SMBUS_IO_BASE + SMBHSTDAT0);
-
- /* start a byte read, with interrupts disabled */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL);
- /* poll for it to start */
- if (smbus_wait_until_active() < 0) {
- return -4;
- }
-
- /* poll for transaction completion */
- if (smbus_wait_until_done() < 0) {
- return -3;
- }
+ unsigned char global_control_register;
+ unsigned char global_status_register;
+ unsigned char byte;
+
+ if (smbus_wait_until_ready() < 0) {
+ outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
+ if (smbus_wait_until_ready() < 0) {
+ return -2;
+ }
+ }
+
+ /* setup transaction */
+ /* disable interrupts */
+ outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xfe, SMBUS_IO_BASE + SMBHSTCTL);
+ /* set the device I'm talking too */
+ outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBXMITADD);
+ /* set the command/address... */
+ outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
+ /* set up for a byte data read */
+ outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xe3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL);
+
+ /* clear any lingering errors, so the transaction will run */
+ outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
+
+ /* clear the data byte... */
+ outb(0, SMBUS_IO_BASE + SMBHSTDAT0);
+
+ /* start a byte read, with interrupts disabled */
+ outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL);
+ /* poll for it to start */
+ if (smbus_wait_until_active() < 0) {
+ return -4;
+ }
+
+ /* poll for transaction completion */
+ if (smbus_wait_until_done() < 0) {
+ return -3;
+ }
/* Ignore the Host Busy & Command Complete ? */
- global_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT) & ~((1<<1)|(1<<0));
+ global_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT) & ~((1 << 1) | (1 << 0));
- /* read results of transaction */
- byte = inb(SMBUS_IO_BASE + SMBHSTDAT0);
+ /* read results of transaction */
+ byte = inb(SMBUS_IO_BASE + SMBHSTDAT0);
- if (global_status_register != 0) {
- return -1;
- }
- return byte;
+ if (global_status_register != 0) {
+ return -1;
+ }
+ return byte;
}
#if 0
/* SMBus routines borrowed from VIA's Trident Driver */
/* this works, so I am not going to touch it for now -- rgm */
-static unsigned char smbus_read_byte(unsigned char devAdr,
- unsigned char bIndex)
+static unsigned char smbus_read_byte(unsigned char devAdr, unsigned char bIndex)
{
unsigned int i;
- unsigned char bData;
- unsigned char sts = 0;
-
+ unsigned char bData;
+ unsigned char sts = 0;
+
/* clear host status */
outb(0xff, SMBUS_IO_BASE);
-
+
/* check SMBUS ready */
- for ( i = 0; i < SMBUS_TIMEOUT; i++ )
- if ( (inb(SMBUS_IO_BASE) & 0x01) == 0 )
+ for (i = 0; i < SMBUS_TIMEOUT; i++)
+ if ((inb(SMBUS_IO_BASE) & 0x01) == 0)
break;
/* set host command */
- outb(bIndex, SMBUS_IO_BASE+3);
-
+ outb(bIndex, SMBUS_IO_BASE + 3);
+
/* set slave address */
- outb(devAdr | 0x01, SMBUS_IO_BASE+4);
-
+ outb(devAdr | 0x01, SMBUS_IO_BASE + 4);
+
/* start */
- outb(0x48, SMBUS_IO_BASE+2);
-
+ outb(0x48, SMBUS_IO_BASE + 2);
+
/* SMBUS Wait Ready */
- for ( i = 0; i < SMBUS_TIMEOUT; i++ )
- if ( ((sts = inb(SMBUS_IO_BASE)) & 0x01) == 0 )
+ for (i = 0; i < SMBUS_TIMEOUT; i++)
+ if (((sts = inb(SMBUS_IO_BASE)) & 0x01) == 0)
break;
if ((sts & ~3) != 0) {
smbus_print_error(sts);
return 0;
}
- bData=inb(SMBUS_IO_BASE+5);
-
+ bData = inb(SMBUS_IO_BASE + 5);
+
return bData;
-
+
}
#endif
/* for reference, here is the fancier version which we will use at some
@@ -252,11 +249,11 @@ int smbus_read_byte(unsigned device, unsigned address, unsigned char *result)
{
unsigned char host_status_register;
unsigned char byte;
-
+
reset();
-
+
smbus_wait_until_ready();
-
+
/* setup transaction */
/* disable interrupts */
outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & (~1), SMBUS_IO_BASE + SMBHSTCTL);
@@ -265,35 +262,32 @@ int smbus_read_byte(unsigned device, unsigned address, unsigned char *result)
/* set the command/address... */
outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
/* set up for a byte data read */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xE3) | (0x2 << 2),
- SMBUS_IO_BASE + SMBHSTCTL);
-
+ outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xE3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL);
+
/* clear any lingering errors, so the transaction will run */
outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
-
- /* clear the data byte...*/
+
+ /* clear the data byte... */
outb(0, SMBUS_IO_BASE + SMBHSTDAT0);
-
+
/* start the command */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40),
- SMBUS_IO_BASE + SMBHSTCTL);
-
+ outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL);
+
/* poll for transaction completion */
smbus_wait_until_done();
-
+
host_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT);
-
+
/* Ignore the In Use Status... */
host_status_register &= ~(1 << 6);
-
+
/* read results of transaction */
byte = inb(SMBUS_IO_BASE + SMBHSTDAT0);
smbus_print_error(byte);
-
+
*result = byte;
return host_status_register != 0x02;
}
#endif
-