Am Donnerstag, den 08.10.2015, 22:48 -0300 schrieb Fabio Estevam:
> From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
>
> Move LTSSM state definitions to common pcie-designware.h so that other
> drivers can make use of them.
>
> Also, in order to avoid name collision define LTSSM_STATE_MASK_KS, as
> keystone uses a different LTSSM mask.
>
Why? Is this some kind of difference between the DW PCIe core revisions?
I don't see the other drivers using any LTSSM state value that would not
fit inside the KS mask. Can we just use the narrower KS mask, even if
the others have one bit more allocated in the register? This would spare
us this needless differentiation in the software.
> Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
> Acked-by: Pratyush Anand <pratyush.anand@xxxxxxxxx>
> ---
> Changes since v1:
> - Fix build warning noticed by kbuild robot
>
> drivers/pci/host/pci-keystone-dw.c | 4 ++--
> drivers/pci/host/pci-layerscape.c | 1 -
> drivers/pci/host/pcie-designware.h | 34 ++++++++++++++++++++++++++++++++++
> drivers/pci/host/pcie-spear13xx.c | 33 ---------------------------------
> 4 files changed, 36 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c
> index 3cf55cd..004b677 100644
> --- a/drivers/pci/host/pci-keystone-dw.c
> +++ b/drivers/pci/host/pci-keystone-dw.c
> @@ -25,7 +25,7 @@
>
> /* Application register defines */
> #define LTSSM_EN_VAL 1
> -#define LTSSM_STATE_MASK 0x1f
> +#define LTSSM_STATE_MASK_KS 0x1f
> #define LTSSM_STATE_L0 0x11
> #define DBI_CS2_EN_VAL 0x20
> #define OB_XLAT_EN_VAL 2
> @@ -445,7 +445,7 @@ int ks_dw_pcie_link_up(struct pcie_port *pp)
> {
> u32 val = readl(pp->dbi_base + DEBUG0);
>
> - return (val & LTSSM_STATE_MASK) == LTSSM_STATE_L0;
> + return (val & LTSSM_STATE_MASK_KS) == LTSSM_STATE_L0;
> }
>
> void ks_dw_pcie_initiate_link_train(struct keystone_pcie *ks_pcie)
> diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
> index b2328ea1..f02752e 100644
> --- a/drivers/pci/host/pci-layerscape.c
> +++ b/drivers/pci/host/pci-layerscape.c
> @@ -29,7 +29,6 @@
> /* PEX1/2 Misc Ports Status Register */
> #define SCFG_PEXMSCPORTSR(pex_idx) (0x94 + (pex_idx) * 4)
> #define LTSSM_STATE_SHIFT 20
> -#define LTSSM_STATE_MASK 0x3f
> #define LTSSM_PCIE_L0 0x11 /* L0 state */
>
> /* Symbol Timer Register and Filter Mask Register 1 */
> diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
> index 35123d9..97d6558 100644
> --- a/drivers/pci/host/pcie-designware.h
> +++ b/drivers/pci/host/pcie-designware.h
> @@ -22,6 +22,40 @@
> #define MAX_MSI_IRQS 32
> #define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
>
> +#define LTSSM_STATE_DETECT_QUIET 0x00
> +#define LTSSM_STATE_DETECT_ACT 0x01
> +#define LTSSM_STATE_POLL_ACTIVE 0x02
> +#define LTSSM_STATE_POLL_COMPLIANCE 0x03
> +#define LTSSM_STATE_POLL_CONFIG 0x04
> +#define LTSSM_STATE_PRE_DETECT_QUIET 0x05
> +#define LTSSM_STATE_DETECT_WAIT 0x06
> +#define LTSSM_STATE_CFG_LINKWD_START 0x07
> +#define LTSSM_STATE_CFG_LINKWD_ACEPT 0x08
> +#define LTSSM_STATE_CFG_LANENUM_WAIT 0x09
> +#define LTSSM_STATE_CFG_LANENUM_ACEPT 0x0A
> +#define LTSSM_STATE_CFG_COMPLETE 0x0B
> +#define LTSSM_STATE_CFG_IDLE 0x0C
> +#define LTSSM_STATE_RCVRY_LOCK 0x0D
> +#define LTSSM_STATE_RCVRY_SPEED 0x0E
> +#define LTSSM_STATE_RCVRY_RCVRCFG 0x0F
> +#define LTSSM_STATE_RCVRY_IDLE 0x10
> +#define LTSSM_STATE_L0 0x11
> +#define LTSSM_STATE_L0S 0x12
> +#define LTSSM_STATE_L123_SEND_EIDLE 0x13
> +#define LTSSM_STATE_L1_IDLE 0x14
> +#define LTSSM_STATE_L2_IDLE 0x15
> +#define LTSSM_STATE_L2_WAKE 0x16
> +#define LTSSM_STATE_DISABLED_ENTRY 0x17
> +#define LTSSM_STATE_DISABLED_IDLE 0x18
> +#define LTSSM_STATE_DISABLED 0x19
> +#define LTSSM_STATE_LPBK_ENTRY 0x1A
> +#define LTSSM_STATE_LPBK_ACTIVE 0x1B
> +#define LTSSM_STATE_LPBK_EXIT 0x1C
> +#define LTSSM_STATE_LPBK_EXIT_TIMEOUT 0x1D
> +#define LTSSM_STATE_HOT_RESET_ENTRY 0x1E
> +#define LTSSM_STATE_HOT_RESET 0x1F
> +#define LTSSM_STATE_MASK 0x3F
> +
I know this is just copy-and-paste, but can we use lowercase letters for
the hex values please? This would make this fit in better with the rest
of the header and is much more like any other part of the kernel.
Regards,
Lucas
> struct pcie_port {
> struct device *dev;
> u8 root_bus_nr;
> diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c
> index 98d2683..920d399 100644
> --- a/drivers/pci/host/pcie-spear13xx.c
> +++ b/drivers/pci/host/pcie-spear13xx.c
> @@ -84,39 +84,6 @@ struct pcie_app_reg {
> #define APPS_PM_XMT_PME_ID 5
>
> /* CR3 ID */
> -#define XMLH_LTSSM_STATE_DETECT_QUIET 0x00
> -#define XMLH_LTSSM_STATE_DETECT_ACT 0x01
> -#define XMLH_LTSSM_STATE_POLL_ACTIVE 0x02
> -#define XMLH_LTSSM_STATE_POLL_COMPLIANCE 0x03
> -#define XMLH_LTSSM_STATE_POLL_CONFIG 0x04
> -#define XMLH_LTSSM_STATE_PRE_DETECT_QUIET 0x05
> -#define XMLH_LTSSM_STATE_DETECT_WAIT 0x06
> -#define XMLH_LTSSM_STATE_CFG_LINKWD_START 0x07
> -#define XMLH_LTSSM_STATE_CFG_LINKWD_ACEPT 0x08
> -#define XMLH_LTSSM_STATE_CFG_LANENUM_WAIT 0x09
> -#define XMLH_LTSSM_STATE_CFG_LANENUM_ACEPT 0x0A
> -#define XMLH_LTSSM_STATE_CFG_COMPLETE 0x0B
> -#define XMLH_LTSSM_STATE_CFG_IDLE 0x0C
> -#define XMLH_LTSSM_STATE_RCVRY_LOCK 0x0D
> -#define XMLH_LTSSM_STATE_RCVRY_SPEED 0x0E
> -#define XMLH_LTSSM_STATE_RCVRY_RCVRCFG 0x0F
> -#define XMLH_LTSSM_STATE_RCVRY_IDLE 0x10
> -#define XMLH_LTSSM_STATE_L0 0x11
> -#define XMLH_LTSSM_STATE_L0S 0x12
> -#define XMLH_LTSSM_STATE_L123_SEND_EIDLE 0x13
> -#define XMLH_LTSSM_STATE_L1_IDLE 0x14
> -#define XMLH_LTSSM_STATE_L2_IDLE 0x15
> -#define XMLH_LTSSM_STATE_L2_WAKE 0x16
> -#define XMLH_LTSSM_STATE_DISABLED_ENTRY 0x17
> -#define XMLH_LTSSM_STATE_DISABLED_IDLE 0x18
> -#define XMLH_LTSSM_STATE_DISABLED 0x19
> -#define XMLH_LTSSM_STATE_LPBK_ENTRY 0x1A
> -#define XMLH_LTSSM_STATE_LPBK_ACTIVE 0x1B
> -#define XMLH_LTSSM_STATE_LPBK_EXIT 0x1C
> -#define XMLH_LTSSM_STATE_LPBK_EXIT_TIMEOUT 0x1D
> -#define XMLH_LTSSM_STATE_HOT_RESET_ENTRY 0x1E
> -#define XMLH_LTSSM_STATE_HOT_RESET 0x1F
> -#define XMLH_LTSSM_STATE_MASK 0x3F
> #define XMLH_LINK_UP (1 << 6)
>
> /* CR4 ID */
--
Pengutronix e.K. | Lucas Stach |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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