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-rw-r--r--arch/powerpc/include/asm/fsl_pci.h18
-rw-r--r--drivers/pci/fsl_pci_init.c44
-rw-r--r--drivers/pci/pci.c65
-rw-r--r--include/pci.h10
4 files changed, 107 insertions, 30 deletions
diff --git a/arch/powerpc/include/asm/fsl_pci.h b/arch/powerpc/include/asm/fsl_pci.h
index 749411c101..5be718b162 100644
--- a/arch/powerpc/include/asm/fsl_pci.h
+++ b/arch/powerpc/include/asm/fsl_pci.h
@@ -18,24 +18,6 @@
/* Freescale-specific PCI config registers */
#define FSL_PCI_PBFR 0x44
-#ifdef CONFIG_SYS_FSL_PCI_VER_3_X
-/* Currently only the PCIe capability is used, so hardcode the offset.
- * if more capabilities need to be justified, the capability link method
- * should be applied here
- */
-#define FSL_PCIE_CAP_ID 0x70
-#define PCI_DCR 0x78 /* PCIe Device Control Register */
-#define PCI_DSR 0x7a /* PCIe Device Status Register */
-#define PCI_LSR 0x82 /* PCIe Link Status Register */
-#define PCI_LCR 0x80 /* PCIe Link Control Register */
-#else
-#define FSL_PCIE_CAP_ID 0x4c
-#define PCI_DCR 0x54 /* PCIe Device Control Register */
-#define PCI_DSR 0x56 /* PCIe Device Status Register */
-#define PCI_LSR 0x5e /* PCIe Link Status Register */
-#define PCI_LCR 0x5c /* PCIe Link Control Register */
-#endif
-
#define FSL_PCIE_CFG_RDY 0x4b0
#define FSL_PROG_IF_AGENT 0x1
diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c
index d55db1a0b6..2085cd6b9b 100644
--- a/drivers/pci/fsl_pci_init.c
+++ b/drivers/pci/fsl_pci_init.c
@@ -295,6 +295,15 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
int enabled, r, inbound = 0;
u16 ltssm;
u8 temp8, pcie_cap;
+ int pcie_cap_pos;
+ int pci_dcr;
+ int pci_dsr;
+ int pci_lsr;
+
+#if defined(CONFIG_FSL_PCIE_DISABLE_ASPM)
+ int pci_lcr;
+#endif
+
volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)cfg_addr;
struct pci_region *reg = hose->regions + hose->region_count;
pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);
@@ -367,7 +376,12 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
hose->region_count++;
/* see if we are a PCIe or PCI controller */
- pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
+ pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
+ pci_dcr = pcie_cap_pos + 0x08;
+ pci_dsr = pcie_cap_pos + 0x0a;
+ pci_lsr = pcie_cap_pos + 0x12;
+
+ pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
#ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
/* boot from PCIE --master */
@@ -406,15 +420,16 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
* - Master PERR (pci)
* - ICCA (PCIe)
*/
- pci_hose_read_config_dword(hose, dev, PCI_DCR, &temp32);
+ pci_hose_read_config_dword(hose, dev, pci_dcr, &temp32);
temp32 |= 0xf000e; /* set URR, FER, NFER (but not CER) */
- pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32);
+ pci_hose_write_config_dword(hose, dev, pci_dcr, temp32);
#if defined(CONFIG_FSL_PCIE_DISABLE_ASPM)
+ pci_lcr = pcie_cap_pos + 0x10;
temp32 = 0;
- pci_hose_read_config_dword(hose, dev, PCI_LCR, &temp32);
+ pci_hose_read_config_dword(hose, dev, pci_lcr, &temp32);
temp32 &= ~0x03; /* Disable ASPM */
- pci_hose_write_config_dword(hose, dev, PCI_LCR, temp32);
+ pci_hose_write_config_dword(hose, dev, pci_lcr, temp32);
udelay(1);
#endif
if (pcie_cap == PCI_CAP_ID_EXP) {
@@ -494,7 +509,7 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
out_be32(&pci->pme_msg_int_en, 0xffffffff);
/* Print the negotiated PCIe link width */
- pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16);
+ pci_hose_read_config_word(hose, dev, pci_lsr, &temp16);
printf("x%d, regs @ 0x%lx\n", (temp16 & 0x3f0 ) >> 4,
pci_info->regs);
@@ -541,9 +556,9 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
out_be32(&pci->pme_msg_det, 0xffffffff);
out_be32(&pci->pedr, 0xffffffff);
- pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16);
+ pci_hose_read_config_word(hose, dev, pci_dsr, &temp16);
if (temp16) {
- pci_hose_write_config_word(hose, dev, PCI_DSR, 0xffff);
+ pci_hose_write_config_word(hose, dev, pci_dsr, 0xffff);
}
pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
@@ -554,10 +569,12 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
int fsl_is_pci_agent(struct pci_controller *hose)
{
+ int pcie_cap_pos;
u8 pcie_cap;
pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);
- pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
+ pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
+ pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
if (pcie_cap == PCI_CAP_ID_EXP) {
u8 header_type;
@@ -582,6 +599,7 @@ int fsl_pci_init_port(struct fsl_pci_info *pci_info,
volatile ccsr_fsl_pci_t *pci;
struct pci_region *r;
pci_dev_t dev = PCI_BDF(busno,0,0);
+ int pcie_cap_pos;
u8 pcie_cap;
pci = (ccsr_fsl_pci_t *) pci_info->regs;
@@ -631,11 +649,11 @@ int fsl_pci_init_port(struct fsl_pci_info *pci_info,
#endif
}
- pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
+ pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
+ pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
printf("PCI%s%x: Bus %02x - %02x\n", pcie_cap == PCI_CAP_ID_EXP ?
"e" : "", pci_info->pci_num,
hose->first_busno, hose->last_busno);
-
return(hose->last_busno + 1);
}
@@ -643,13 +661,15 @@ int fsl_pci_init_port(struct fsl_pci_info *pci_info,
void fsl_pci_config_unlock(struct pci_controller *hose)
{
pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
+ int pcie_cap_pos;
u8 pcie_cap;
u16 pbfr;
if (!fsl_is_pci_agent(hose))
return;
- pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
+ pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
+ pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
if (pcie_cap != 0x0) {
/* PCIe - set CFG_READY bit of Configuration Ready Register */
pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 2c071589b4..ed113bf402 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -722,3 +722,68 @@ void pci_init(void)
/* now call board specific pci_init()... */
pci_init_board();
}
+
+/* Returns the address of the requested capability structure within the
+ * device's PCI configuration space or 0 in case the device does not
+ * support it.
+ * */
+int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
+ int cap)
+{
+ int pos;
+ u8 hdr_type;
+
+ pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &hdr_type);
+
+ pos = pci_hose_find_cap_start(hose, dev, hdr_type & 0x7F);
+
+ if (pos)
+ pos = pci_find_cap(hose, dev, pos, cap);
+
+ return pos;
+}
+
+/* Find the header pointer to the Capabilities*/
+int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
+ u8 hdr_type)
+{
+ u16 status;
+
+ pci_hose_read_config_word(hose, dev, PCI_STATUS, &status);
+
+ if (!(status & PCI_STATUS_CAP_LIST))
+ return 0;
+
+ switch (hdr_type) {
+ case PCI_HEADER_TYPE_NORMAL:
+ case PCI_HEADER_TYPE_BRIDGE:
+ return PCI_CAPABILITY_LIST;
+ case PCI_HEADER_TYPE_CARDBUS:
+ return PCI_CB_CAPABILITY_LIST;
+ default:
+ return 0;
+ }
+}
+
+int pci_find_cap(struct pci_controller *hose, pci_dev_t dev, int pos, int cap)
+{
+ int ttl = PCI_FIND_CAP_TTL;
+ u8 id;
+ u8 next_pos;
+
+ while (ttl--) {
+ pci_hose_read_config_byte(hose, dev, pos, &next_pos);
+ if (next_pos < CAP_START_POS)
+ break;
+ next_pos &= ~3;
+ pos = (int) next_pos;
+ pci_hose_read_config_byte(hose, dev,
+ pos + PCI_CAP_LIST_ID, &id);
+ if (id == 0xff)
+ break;
+ if (id == cap)
+ return pos;
+ pos += PCI_CAP_LIST_NEXT;
+ }
+ return 0;
+}
diff --git a/include/pci.h b/include/pci.h
index 911ba89ac3..d462479667 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -410,6 +410,9 @@
#define PCI_MAX_PCI_DEVICES 32
#define PCI_MAX_PCI_FUNCTIONS 8
+#define PCI_FIND_CAP_TTL 0x48
+#define CAP_START_POS 0x40
+
/* Include the ID list */
#include <pci_ids.h>
@@ -647,6 +650,13 @@ extern int pci_hose_config_device(struct pci_controller *hose,
pci_addr_t mem,
unsigned long command);
+extern int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
+ int cap);
+extern int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
+ u8 hdr_type);
+extern int pci_find_cap(struct pci_controller *hose, pci_dev_t dev, int pos,
+ int cap);
+
const char * pci_class_str(u8 class);
int pci_last_busno(void);
generated by cgit (git 2.34.1) at 2024-12-26 20:13:13 +0000