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add PCI driver interface enumeration routine

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This commit is contained in:
Markus Fröschle
2015-11-20 19:25:57 +00:00
parent 3fc79b9c84
commit 54cd5c8151
10 changed files with 396 additions and 151 deletions
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19
pci/pci.c
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@@ -33,7 +33,7 @@
#include "interrupts.h"
#include "wait.h"
// #define DEBUG_PCI
#define DEBUG_PCI
#ifdef DEBUG_PCI
#define dbg(format, arg...) do { xprintf("DEBUG: %s(): " format, __FUNCTION__, ##arg); } while (0)
#else
@@ -392,6 +392,9 @@ uint8_t pci_read_config_byte(int32_t handle, int offset)
int32_t pci_write_config_longword(int32_t handle, int offset, uint32_t value)
{
/* initiate PCI configuration access to device */
dbg("initiate configuration access\r\n");
MCF_PCI_PCICAR = MCF_PCI_PCICAR_E | /* enable configuration access special cycle */
MCF_PCI_PCICAR_BUSNUM(PCI_BUS_FROM_HANDLE(handle)) |
MCF_PCI_PCICAR_DEVNUM(PCI_DEVICE_FROM_HANDLE(handle)) | /* device number, devices 0 - 9 are reserved */
@@ -400,11 +403,15 @@ int32_t pci_write_config_longword(int32_t handle, int offset, uint32_t value)
NOP();
dbg("access device\r\n");
* (volatile uint32_t *) PCI_IO_OFFSET = value; /* access device */
dbg("chip errata\r\n");
chip_errata_135();
NOP();
dbg("finish config space access cycle\r\n");
/* finish configuration space access cycle */
MCF_PCI_PCICAR &= ~MCF_PCI_PCICAR_E;
@@ -562,6 +569,7 @@ int32_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index)
* pci_find_classcode(uint32_t classcode, int index)
*
* Find the index'th pci device with a specific classcode. Bits 0-23 describe this classcode.
*
* Bits 24 - 26 describe what needs to match: 24: prog interface, 25: PCI subclass, 26: PCI base class.
* If no bits are set, there is a match for each device.
*/
@@ -581,6 +589,7 @@ int32_t pci_find_classcode(uint32_t classcode, int index)
uint8_t htr;
handle = PCI_HANDLE(bus, device, 0);
dbg("check handle %d\r\n", handle);
value = pci_read_config_longword(handle, PCIIDR);
@@ -1041,10 +1050,11 @@ static void pci_bridge_config(uint16_t bus, uint16_t device, uint16_t function)
if (function != 0)
{
dbg("trying to configure a multi-function bridge. Cancelled\r\n");
err("trying to configure a multi-function bridge. Cancelled\r\n");
return;
}
handle = PCI_HANDLE(bus, device, function);
dbg("handle=%d\r\n", handle);
pci_write_config_longword(handle, PCIBAR0, 0x40000000);
pci_write_config_longword(handle, PCIBAR1, 0x0);
@@ -1081,6 +1091,7 @@ void pci_scan(void)
/* save handle to index value so that we'll be able to later find our resources */
handles[index] = handle;
handles[index + 1] = -1;
if (PCI_VENDOR_ID(value) != 0x1057 && PCI_DEVICE_ID(value) != 0x5806) /* do not configure bridge */
{
@@ -1091,10 +1102,12 @@ void pci_scan(void)
}
else
{
dbg("");
pci_bridge_config(PCI_BUS_FROM_HANDLE(handle),
PCI_DEVICE_FROM_HANDLE(handle),
PCI_FUNCTION_FROM_HANDLE(handle));
}
dbg("");
handle = pci_find_device(0x0, 0xFFFF, ++index);
}
xprintf("\r\n...finished\r\n");
@@ -1118,7 +1131,7 @@ void init_eport(void)
MCF_EPORT_EPDDR = 0; /* clear data direction register. All pins as input */
MCF_EPORT_EPFR = -1; /* clear all EPORT interrupt flags */
MCF_EPORT_EPIER = 0xfe; /* enable all EPORT interrupts (for now) */
// MCF_EPORT_EPIER = 0xfe; /* enable all EPORT interrupts (for now) */
}
void init_xlbus_arbiter(void)