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path: root/src/southbridge/nvidia/mcp55/lpc.c
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Diffstat (limited to 'src/southbridge/nvidia/mcp55/lpc.c')
-rw-r--r--src/southbridge/nvidia/mcp55/lpc.c176
1 files changed, 89 insertions, 87 deletions
diff --git a/src/southbridge/nvidia/mcp55/lpc.c b/src/southbridge/nvidia/mcp55/lpc.c
index 3132eedbd2..9ea192337f 100644
--- a/src/southbridge/nvidia/mcp55/lpc.c
+++ b/src/southbridge/nvidia/mcp55/lpc.c
@@ -54,14 +54,14 @@
static void lpc_common_init(device_t dev, int master)
{
- uint8_t byte;
- uint32_t ioapic_base;
+ u8 byte;
+ u32 ioapic_base;
- /* IO APIC initialization */
+ /* IOAPIC initialization. */
byte = pci_read_config8(dev, 0x74);
- byte |= (1<<0); // enable APIC
+ byte |= (1 << 0); /* Enable IOAPIC. */
pci_write_config8(dev, 0x74, byte);
- ioapic_base = pci_read_config32(dev, PCI_BASE_ADDRESS_1); // 0x14
+ ioapic_base = pci_read_config32(dev, PCI_BASE_ADDRESS_1); /* 0x14 */
if (master)
setup_ioapic(ioapic_base, 0);
@@ -78,24 +78,22 @@ static void enable_hpet(struct device *dev)
{
unsigned long hpet_address;
- pci_write_config32(dev,0x44, 0xfed00001);
- hpet_address=pci_read_config32(dev,0x44)& 0xfffffffe;
+ pci_write_config32(dev, 0x44, 0xfed00001);
+ hpet_address=pci_read_config32(dev, 0x44) & 0xfffffffe;
printk(BIOS_DEBUG, "enabling HPET @0x%lx\n", hpet_address);
}
static void lpc_init(device_t dev)
{
- uint8_t byte;
- uint8_t byte_old;
- int on;
- int nmi_option;
+ u8 byte, byte_old;
+ int on, nmi_option;
lpc_common_init(dev, 1);
#if 0
- /* posted memory write enable */
+ /* Posted memory write enable. */
byte = pci_read_config8(dev, 0x46);
- pci_write_config8(dev, 0x46, byte | (1<<0));
+ pci_write_config8(dev, 0x46, byte | (1 << 0));
#endif
/* power after power fail */
@@ -104,63 +102,58 @@ static void lpc_init(device_t dev)
get_option(&on, "power_on_after_fail");
byte = pci_read_config8(dev, PREVIOUS_POWER_STATE);
byte &= ~0x40;
- if (!on) {
+ if (!on)
byte |= 0x40;
- }
pci_write_config8(dev, PREVIOUS_POWER_STATE, byte);
- printk(BIOS_INFO, "set power %s after power fail\n", on?"on":"off");
+ printk(BIOS_INFO, "set power %s after power fail\n", on ? "on" : "off");
#endif
- /* Throttle the CPU speed down for testing */
+ /* Throttle the CPU speed down for testing. */
on = SLOW_CPU_OFF;
get_option(&on, "slow_cpu");
- if(on) {
- uint16_t pm10_bar;
- uint32_t dword;
- pm10_bar = (pci_read_config16(dev, 0x60)&0xff00);
- outl(((on<<1)+0x10) ,(pm10_bar + 0x10));
+ if (on) {
+ u16 pm10_bar;
+ u32 dword;
+ pm10_bar = (pci_read_config16(dev, 0x60) & 0xff00);
+ outl(((on << 1) + 0x10), (pm10_bar + 0x10));
dword = inl(pm10_bar + 0x10);
- on = 8-on;
+ on = 8 - on;
printk(BIOS_DEBUG, "Throttling CPU %2d.%1.1d percent.\n",
- (on*12)+(on>>1),(on&1)*5);
+ (on * 12) + (on >> 1), (on & 1) * 5);
}
#if 0
-// default is enabled
- /* Enable Port 92 fast reset */
+ /* Enable Port 92 fast reset (default is enabled). */
byte = pci_read_config8(dev, 0xe8);
byte |= ~(1 << 3);
pci_write_config8(dev, 0xe8, byte);
#endif
- /* Enable Error reporting */
- /* Set up sync flood detected */
+ /* Enable error reporting. */
+ /* Set up sync flood detected. */
byte = pci_read_config8(dev, 0x47);
byte |= (1 << 1);
pci_write_config8(dev, 0x47, byte);
- /* Set up NMI on errors */
- byte = inb(0x70); // RTC70
+ /* Set up NMI on errors. */
+ byte = inb(0x70); /* RTC70 */
byte_old = byte;
nmi_option = NMI_OFF;
get_option(&nmi_option, "nmi");
- if (nmi_option) {
- byte &= ~(1 << 7); /* set NMI */
- } else {
- byte |= ( 1 << 7); // Can not mask NMI from PCI-E and NMI_NOW
- }
- if( byte != byte_old) {
+ if (nmi_option)
+ byte &= ~(1 << 7); /* Set NMI. */
+ else
+ byte |= ( 1 << 7); /* Can't mask NMI from PCI-E and NMI_NOW. */
+ if (byte != byte_old)
outb(byte, 0x70);
- }
- /* Initialize the real time clock */
+ /* Initialize the real time clock. */
rtc_init(0);
- /* Initialize isa dma */
+ /* Initialize ISA DMA. */
isa_dma_init();
- /* Initialize the High Precision Event Timers */
+ /* Initialize the High Precision Event Timers (HPET). */
enable_hpet(dev);
-
}
static void mcp55_lpc_read_resources(device_t dev)
@@ -191,16 +184,14 @@ static void mcp55_lpc_read_resources(device_t dev)
}
/**
- * @brief Enable resources for children devices
- *
- * @param dev the device whos children's resources are to be enabled
+ * Enable resources for children devices.
*
+ * @param dev The device whose children's resources are to be enabled.
*/
static void mcp55_lpc_enable_childrens_resources(device_t dev)
{
- uint32_t reg, reg_var[4];
- int i;
- int var_num = 0;
+ u32 reg, reg_var[4];
+ int i, var_num = 0;
struct bus *link;
reg = pci_read_config32(dev, 0xa0);
@@ -208,43 +199,50 @@ static void mcp55_lpc_enable_childrens_resources(device_t dev)
for (link = dev->link_list; link; link = link->next) {
device_t child;
for (child = link->children; child; child = child->sibling) {
- if(child->enabled && (child->path.type == DEVICE_PATH_PNP)) {
+ if (child->enabled && (child->path.type == DEVICE_PATH_PNP)) {
struct resource *res;
- for(res = child->resource_list; res; res = res->next) {
- unsigned long base, end; // don't need long long
- if(!(res->flags & IORESOURCE_IO)) continue;
+ for (res = child->resource_list; res; res = res->next) {
+ unsigned long base, end; /* Don't need long long. */
+ if (!(res->flags & IORESOURCE_IO))
+ continue;
base = res->base;
end = resource_end(res);
printk(BIOS_DEBUG, "mcp55 lpc decode:%s, base=0x%08lx, end=0x%08lx\n",dev_path(child),base, end);
switch(base) {
- case 0x3f8: // COM1
- reg |= (1<<0); break;
- case 0x2f8: // COM2
- reg |= (1<<1); break;
- case 0x378: // Parallal 1
- reg |= (1<<24); break;
- case 0x3f0: // FD0
- reg |= (1<<20); break;
- case 0x220: // Aduio 0
- reg |= (1<<8); break;
- case 0x300: // Midi 0
- reg |= (1<<12); break;
+ case 0x3f8: /* COM1 */
+ reg |= (1 << 0);
+ break;
+ case 0x2f8: /* COM2 */
+ reg |= (1 << 1);
+ break;
+ case 0x378: /* Parallel 1 */
+ reg |= (1 << 24);
+ break;
+ case 0x3f0: /* FD0 */
+ reg |= (1 << 20);
+ break;
+ case 0x220: /* Audio 0 */
+ reg |= (1 << 8);
+ break;
+ case 0x300: /* Midi 0 */
+ reg |= (1 << 12);
+ break;
}
- if( (base == 0x290) || (base >= 0x400)) {
- if(var_num>=4) continue; // only 4 var ; compact them ?
- reg |= (1<<(28+var_num));
- reg_var[var_num++] = (base & 0xffff)|((end & 0xffff)<<16);
+ if ((base == 0x290)
+ || (base >= 0x400)) {
+ /* Only 4 var; compact them? */
+ if (var_num >= 4)
+ continue;
+ reg |= (1 << (28 + var_num));
+ reg_var[var_num++] = (base & 0xffff) | ((end & 0xffff) << 16);
}
}
}
}
}
pci_write_config32(dev, 0xa0, reg);
- for(i=0;i<var_num;i++) {
- pci_write_config32(dev, 0xa8 + i*4, reg_var[i]);
- }
-
-
+ for (i = 0; i < var_num; i++)
+ pci_write_config32(dev, 0xa8 + i * 4, reg_var[i]);
}
static void mcp55_lpc_enable_resources(device_t dev)
@@ -253,14 +251,14 @@ static void mcp55_lpc_enable_resources(device_t dev)
mcp55_lpc_enable_childrens_resources(dev);
}
-static struct device_operations lpc_ops = {
- .read_resources = mcp55_lpc_read_resources,
- .set_resources = pci_dev_set_resources,
- .enable_resources = mcp55_lpc_enable_resources,
- .init = lpc_init,
- .scan_bus = scan_static_bus,
-// .enable = mcp55_enable,
- .ops_pci = &mcp55_pci_ops,
+static struct device_operations lpc_ops = {
+ .read_resources = mcp55_lpc_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = mcp55_lpc_enable_resources,
+ .init = lpc_init,
+ .scan_bus = scan_static_bus,
+// .enable = mcp55_enable,
+ .ops_pci = &mcp55_pci_ops,
};
static const struct pci_driver lpc_driver __pci_driver = {
.ops = &lpc_ops,
@@ -279,34 +277,38 @@ static const struct pci_driver lpc_driver_lpc2 __pci_driver = {
.vendor = PCI_VENDOR_ID_NVIDIA,
.device = PCI_DEVICE_ID_NVIDIA_MCP55_LPC_2,
};
+
static const struct pci_driver lpc_driver_lpc3 __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_NVIDIA,
.device = PCI_DEVICE_ID_NVIDIA_MCP55_LPC_3,
};
+
static const struct pci_driver lpc_driver_lpc4 __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_NVIDIA,
.device = PCI_DEVICE_ID_NVIDIA_MCP55_LPC_4,
};
+
static const struct pci_driver lpc_driver_lpc5 __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_NVIDIA,
.device = PCI_DEVICE_ID_NVIDIA_MCP55_LPC_5,
};
+
static const struct pci_driver lpc_driver_lpc6 __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_NVIDIA,
.device = PCI_DEVICE_ID_NVIDIA_MCP55_LPC_6,
};
-static struct device_operations lpc_slave_ops = {
- .read_resources = mcp55_lpc_read_resources,
- .set_resources = pci_dev_set_resources,
- .enable_resources = pci_dev_enable_resources,
- .init = lpc_slave_init,
-// .enable = mcp55_enable,
- .ops_pci = &mcp55_pci_ops,
+static struct device_operations lpc_slave_ops = {
+ .read_resources = mcp55_lpc_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = lpc_slave_init,
+// .enable = mcp55_enable,
+ .ops_pci = &mcp55_pci_ops,
};
static const struct pci_driver lpc_driver_slave __pci_driver = {
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-17 01:00:54 +0000