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authorKyösti Mälkki <kyosti.malkki@gmail.com>2019-09-26 22:33:51 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2019-09-30 20:06:06 +0000
commita0b366d550e720f2e086db20b5f7f7b07ccabc02 (patch)
treed6f1d76e1b5c90d7f26250559e67b94c25f32c4c /src/device/pci_early.c
parent50b4f78344e800bdfe9ef7d2b64331a24191e112 (diff)
downloadcoreboot-a0b366d550e720f2e086db20b5f7f7b07ccabc02.tar.xz
device/pci_early: Drop some __SIMPLE_DEVICE__ use
The simple PCI config accessors are always available under names pci_s_[read|write]_configX. We have some use for PCI bridge configurations and resets in romstages, so expose them. Change-Id: Ia97a4e1f1b4c80b3dae800d80615bdc118414ed3 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35672 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/device/pci_early.c')
-rw-r--r--src/device/pci_early.c71
1 files changed, 35 insertions, 36 deletions
diff --git a/src/device/pci_early.c b/src/device/pci_early.c
index 880480d280..b15f4a3370 100644
--- a/src/device/pci_early.c
+++ b/src/device/pci_early.c
@@ -11,64 +11,61 @@
* GNU General Public License for more details.
*/
-#define __SIMPLE_DEVICE__
-
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <device/pci_type.h>
#include <delay.h>
-static void pci_bridge_reset_secondary(pci_devfn_t p2p_bridge)
+void pci_s_assert_secondary_reset(pci_devfn_t p2p_bridge)
{
u16 reg16;
+ reg16 = pci_s_read_config16(p2p_bridge, PCI_BRIDGE_CONTROL);
+ reg16 |= PCI_BRIDGE_CTL_BUS_RESET;
+ pci_s_write_config16(p2p_bridge, PCI_BRIDGE_CONTROL, reg16);
+}
- /* First we reset the secondary bus. */
- reg16 = pci_read_config16(p2p_bridge, PCI_BRIDGE_CONTROL);
- reg16 |= (1 << 6); /* SRESET */
- pci_write_config16(p2p_bridge, PCI_BRIDGE_CONTROL, reg16);
-
- /* Assume we don't have to wait here forever */
-
- /* Read back and clear reset bit. */
- reg16 = pci_read_config16(p2p_bridge, PCI_BRIDGE_CONTROL);
- reg16 &= ~(1 << 6); /* SRESET */
- pci_write_config16(p2p_bridge, PCI_BRIDGE_CONTROL, reg16);
+void pci_s_deassert_secondary_reset(pci_devfn_t p2p_bridge)
+{
+ u16 reg16;
+ reg16 = pci_s_read_config16(p2p_bridge, PCI_BRIDGE_CONTROL);
+ reg16 &= ~PCI_BRIDGE_CTL_BUS_RESET;
+ pci_s_write_config16(p2p_bridge, PCI_BRIDGE_CONTROL, reg16);
}
-static void pci_bridge_set_secondary(pci_devfn_t p2p_bridge, u8 secondary)
+void pci_s_bridge_set_secondary(pci_devfn_t p2p_bridge, u8 secondary)
{
/* Disable config transaction forwarding. */
- pci_write_config8(p2p_bridge, PCI_SECONDARY_BUS, 0x00);
- pci_write_config8(p2p_bridge, PCI_SUBORDINATE_BUS, 0x00);
+ pci_s_write_config8(p2p_bridge, PCI_SECONDARY_BUS, 0x00);
+ pci_s_write_config8(p2p_bridge, PCI_SUBORDINATE_BUS, 0x00);
/* Enable config transaction forwarding. */
- pci_write_config8(p2p_bridge, PCI_SECONDARY_BUS, secondary);
- pci_write_config8(p2p_bridge, PCI_SUBORDINATE_BUS, secondary);
+ pci_s_write_config8(p2p_bridge, PCI_SECONDARY_BUS, secondary);
+ pci_s_write_config8(p2p_bridge, PCI_SUBORDINATE_BUS, secondary);
}
-static void pci_bridge_set_mmio(pci_devfn_t p2p_bridge, u32 base, u32 size)
+static void pci_s_bridge_set_mmio(pci_devfn_t p2p_bridge, u32 base, u32 size)
{
u16 reg16;
/* Disable MMIO window behind the bridge. */
- reg16 = pci_read_config16(p2p_bridge, PCI_COMMAND);
+ reg16 = pci_s_read_config16(p2p_bridge, PCI_COMMAND);
reg16 &= ~PCI_COMMAND_MEMORY;
- pci_write_config16(p2p_bridge, PCI_COMMAND, reg16);
- pci_write_config32(p2p_bridge, PCI_MEMORY_BASE, 0x10);
+ pci_s_write_config16(p2p_bridge, PCI_COMMAND, reg16);
+ pci_s_write_config32(p2p_bridge, PCI_MEMORY_BASE, 0x10);
if (!size)
return;
/* Enable MMIO window behind the bridge. */
- pci_write_config32(p2p_bridge, PCI_MEMORY_BASE,
+ pci_s_write_config32(p2p_bridge, PCI_MEMORY_BASE,
((base + size - 1) & 0xfff00000) | ((base >> 16) & 0xfff0));
- reg16 = pci_read_config16(p2p_bridge, PCI_COMMAND);
+ reg16 = pci_s_read_config16(p2p_bridge, PCI_COMMAND);
reg16 |= PCI_COMMAND_MEMORY;
- pci_write_config16(p2p_bridge, PCI_COMMAND, reg16);
+ pci_s_write_config16(p2p_bridge, PCI_COMMAND, reg16);
}
-void pci_early_mmio_window(pci_devfn_t p2p_bridge, u32 mmio_base, u32 mmio_size)
+static void pci_s_early_mmio_window(pci_devfn_t p2p_bridge, u32 mmio_base, u32 mmio_size)
{
int timeout, ret = -1;
@@ -79,12 +76,14 @@ void pci_early_mmio_window(pci_devfn_t p2p_bridge, u32 mmio_base, u32 mmio_size)
u8 dev = 0;
/* Enable configuration and MMIO over bridge. */
- pci_bridge_reset_secondary(p2p_bridge);
- pci_bridge_set_secondary(p2p_bridge, secondary);
- pci_bridge_set_mmio(p2p_bridge, mmio_base, mmio_size);
+ pci_s_assert_secondary_reset(p2p_bridge);
+ pci_s_deassert_secondary_reset(p2p_bridge);
+ pci_s_bridge_set_secondary(p2p_bridge, secondary);
+ pci_s_bridge_set_mmio(p2p_bridge, mmio_base, mmio_size);
for (timeout = 20000; timeout; timeout--) {
- u32 id = pci_read_config32(PCI_DEV(secondary, dev, 0), PCI_VENDOR_ID);
+ pci_devfn_t dbg_dev = PCI_DEV(secondary, dev, 0);
+ u32 id = pci_s_read_config32(dbg_dev, PCI_VENDOR_ID);
if (id != 0 && id != 0xffffffff && id != 0xffff0001)
break;
udelay(10);
@@ -95,13 +94,13 @@ void pci_early_mmio_window(pci_devfn_t p2p_bridge, u32 mmio_base, u32 mmio_size)
/* Disable MMIO window if we found no suitable device. */
if (ret)
- pci_bridge_set_mmio(p2p_bridge, 0, 0);
+ pci_s_bridge_set_mmio(p2p_bridge, 0, 0);
/* Resource allocator will reconfigure bridges and secondary bus
* number may change. Thus early device cannot reliably use config
* transactions from here on, so we may as well disable them.
*/
- pci_bridge_set_secondary(p2p_bridge, 0);
+ pci_s_bridge_set_secondary(p2p_bridge, 0);
}
void pci_early_bridge_init(void)
@@ -112,7 +111,7 @@ void pci_early_bridge_init(void)
pci_devfn_t p2p_bridge = PCI_DEV(0, CONFIG_EARLY_PCI_BRIDGE_DEVICE,
CONFIG_EARLY_PCI_BRIDGE_FUNCTION);
- pci_early_mmio_window(p2p_bridge, CONFIG_EARLY_PCI_MMIO_BASE, 0x4000);
+ pci_s_early_mmio_window(p2p_bridge, CONFIG_EARLY_PCI_MMIO_BASE, 0x4000);
}
/* FIXME: A lot of issues using the following, please avoid.
@@ -123,7 +122,7 @@ pci_devfn_t pci_locate_device(unsigned int pci_id, pci_devfn_t dev)
{
for (; dev <= PCI_DEV(255, 31, 7); dev += PCI_DEV(0, 0, 1)) {
unsigned int id;
- id = pci_read_config32(dev, 0);
+ id = pci_s_read_config32(dev, 0);
if (id == pci_id)
return dev;
}
@@ -139,7 +138,7 @@ pci_devfn_t pci_locate_device_on_bus(unsigned int pci_id, unsigned int bus)
for (; dev <= last; dev += PCI_DEV(0, 0, 1)) {
unsigned int id;
- id = pci_read_config32(dev, 0);
+ id = pci_s_read_config32(dev, 0);
if (id == pci_id)
return dev;
}