diff options
| author | Zang Roy-R61911 | 2013-07-04 07:25:03 +0800 |
|---|---|---|
| committer | York Sun | 2013-08-09 12:41:41 -0700 |
| commit | 7b4e58440f7813a952133e77f2d9c4a475730e40 (patch) | |
| tree | 9d2082e2063031e51b07ea1f040d35c3263accb0 /drivers | |
| parent | 0795eff34c5744dcc59ead6edbbcd2cd600f58fe (diff) | |
powerpc/pcie: add PCIe version 3.x support
T4240 PCIe IP is version 3.0 and has some update comparing previous
QorIQ products.
1. Move Freescale specific register define
to
arch/powerpc/include/asm/fsl_pci.h
and update the register offset define for T4240.
2. add the status/control register define
use status/control register to judge the link status
3. The original code uses 'Programming Interface' field to judge if PCIE is
EP or RC mode, however, T4240 does not support this functionality.
According to PCIE specification, 'Header Type' offset 0x0e is used to
indicate header type, so for PCIE controller, the patch changes code to
use 'Header Type' field to identify if the PCIE is RC or EP mode.
This patch fixes the PCIe card link up issue on T4240QDS.
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/fsl_pci_init.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/pci/fsl_pci_init.c b/drivers/pci/fsl_pci_init.c index 17ca961abf9..d55db1a0b69 100644 --- a/drivers/pci/fsl_pci_init.c +++ b/drivers/pci/fsl_pci_init.c @@ -28,12 +28,6 @@ DECLARE_GLOBAL_DATA_PTR; #include <asm/io.h> #include <asm/fsl_pci.h> -/* Freescale-specific PCI config registers */ -#define FSL_PCI_PBFR 0x44 -#define FSL_PCIE_CAP_ID 0x4c -#define FSL_PCIE_CFG_RDY 0x4b0 -#define FSL_PROG_IF_AGENT 0x1 - #ifndef CONFIG_SYS_PCI_MEMORY_BUS #define CONFIG_SYS_PCI_MEMORY_BUS 0 #endif @@ -424,6 +418,15 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info) udelay(1); #endif if (pcie_cap == PCI_CAP_ID_EXP) { + if (block_rev >= PEX_IP_BLK_REV_3_0) { +#define PEX_CSR0_LTSSM_MASK 0xFC +#define PEX_CSR0_LTSSM_SHIFT 2 + ltssm = (in_be32(&pci->pex_csr0) + & PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT; + enabled = (ltssm == 0x11) ? 1 : 0; + } else { + /* pci_hose_read_config_word(hose, dev, PCI_LTSSM, <ssm); */ + /* enabled = ltssm >= PCI_LTSSM_L0; */ pci_hose_read_config_word(hose, dev, PCI_LTSSM, <ssm); enabled = ltssm >= PCI_LTSSM_L0; @@ -456,6 +459,7 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info) PCI_BASE_ADDRESS_0, pcicsrbar); } #endif + } #ifdef CONFIG_SYS_P4080_ERRATUM_PCIE_A003 if (enabled == 0) { @@ -564,6 +568,10 @@ int fsl_is_pci_agent(struct pci_controller *hose) u8 prog_if; pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prog_if); + /* Programming Interface (PCI_CLASS_PROG) + * 0 == pci host or pcie root-complex, + * 1 == pci agent or pcie end-point + */ return (prog_if == FSL_PROG_IF_AGENT); } } |