[U-Boot] [PATCH 27/57] x86: ivybridge: Move northbridge and PCH init into drivers
Bin Meng
bmeng.cn at gmail.com
Sun Dec 13 13:54:30 CET 2015
Hi Simon,
On Tue, Dec 8, 2015 at 11:38 AM, Simon Glass <sjg at chromium.org> wrote:
> Instead of calling the northbridge and PCH init from bd82x6x_init_extra()
> when the PCI bus is probed, call it from the respective drivers.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> arch/x86/cpu/ivybridge/bd82x6x.c | 42 --------------------
> arch/x86/cpu/ivybridge/northbridge.c | 55 +++++++++++++++++++++++++--
> arch/x86/include/asm/arch-ivybridge/bd82x6x.h | 1 -
> board/google/chromebook_link/link.c | 8 ----
> 4 files changed, 52 insertions(+), 54 deletions(-)
>
> diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
> index cf30a3a..799d5cb 100644
> --- a/arch/x86/cpu/ivybridge/bd82x6x.c
> +++ b/arch/x86/cpu/ivybridge/bd82x6x.c
> @@ -17,45 +17,6 @@
> #include <asm/arch/pch.h>
> #include <asm/arch/sandybridge.h>
>
> -void bd82x6x_pci_init(pci_dev_t dev)
> -{
> - u16 reg16;
> - u8 reg8;
> -
> - debug("bd82x6x PCI init.\n");
> - /* Enable Bus Master */
> - reg16 = x86_pci_read_config16(dev, PCI_COMMAND);
> - reg16 |= PCI_COMMAND_MASTER;
> - x86_pci_write_config16(dev, PCI_COMMAND, reg16);
> -
> - /* This device has no interrupt */
> - x86_pci_write_config8(dev, INTR, 0xff);
> -
> - /* disable parity error response and SERR */
> - reg16 = x86_pci_read_config16(dev, BCTRL);
> - reg16 &= ~(1 << 0);
> - reg16 &= ~(1 << 1);
> - x86_pci_write_config16(dev, BCTRL, reg16);
> -
> - /* Master Latency Count must be set to 0x04! */
> - reg8 = x86_pci_read_config8(dev, SMLT);
> - reg8 &= 0x07;
> - reg8 |= (0x04 << 3);
> - x86_pci_write_config8(dev, SMLT, reg8);
> -
> - /* Will this improve throughput of bus masters? */
> - x86_pci_write_config8(dev, PCI_MIN_GNT, 0x06);
> -
> - /* Clear errors in status registers */
> - reg16 = x86_pci_read_config16(dev, PSTS);
> - /* reg16 |= 0xf900; */
> - x86_pci_write_config16(dev, PSTS, reg16);
> -
> - reg16 = x86_pci_read_config16(dev, SECSTS);
> - /* reg16 |= 0xf900; */
> - x86_pci_write_config16(dev, SECSTS, reg16);
> -}
> -
> static int bd82x6x_probe(struct udevice *dev)
> {
> const void *blob = gd->fdt_blob;
> @@ -106,10 +67,7 @@ int bd82x6x_init_extra(void)
> return -EINVAL;
> }
>
> - bd82x6x_pci_init(PCH_DEV);
> bd82x6x_sata_enable(PCH_SATA_DEV, blob, sata_node);
> - northbridge_enable(PCH_DEV);
> - northbridge_init(PCH_DEV);
>
> return 0;
> }
> diff --git a/arch/x86/cpu/ivybridge/northbridge.c b/arch/x86/cpu/ivybridge/northbridge.c
> index 48c8cd7..2e63552 100644
> --- a/arch/x86/cpu/ivybridge/northbridge.c
> +++ b/arch/x86/cpu/ivybridge/northbridge.c
> @@ -21,6 +21,45 @@
>
> static int bridge_revision_id = -1;
>
> +static void bd82x6x_pci_init(pci_dev_t dev)
> +{
> + u16 reg16;
> + u8 reg8;
> +
> + debug("bd82x6x PCI init.\n");
> + /* Enable Bus Master */
> + reg16 = x86_pci_read_config16(dev, PCI_COMMAND);
> + reg16 |= PCI_COMMAND_MASTER;
> + x86_pci_write_config16(dev, PCI_COMMAND, reg16);
> +
> + /* This device has no interrupt */
> + x86_pci_write_config8(dev, INTR, 0xff);
> +
> + /* disable parity error response and SERR */
> + reg16 = x86_pci_read_config16(dev, BCTRL);
> + reg16 &= ~(1 << 0);
> + reg16 &= ~(1 << 1);
> + x86_pci_write_config16(dev, BCTRL, reg16);
> +
> + /* Master Latency Count must be set to 0x04! */
> + reg8 = x86_pci_read_config8(dev, SMLT);
> + reg8 &= 0x07;
> + reg8 |= (0x04 << 3);
> + x86_pci_write_config8(dev, SMLT, reg8);
> +
> + /* Will this improve throughput of bus masters? */
> + x86_pci_write_config8(dev, PCI_MIN_GNT, 0x06);
> +
> + /* Clear errors in status registers */
> + reg16 = x86_pci_read_config16(dev, PSTS);
> + /* reg16 |= 0xf900; */
> + x86_pci_write_config16(dev, PSTS, reg16);
> +
> + reg16 = x86_pci_read_config16(dev, SECSTS);
> + /* reg16 |= 0xf900; */
> + x86_pci_write_config16(dev, SECSTS, reg16);
Are the above settings are absolute necessary? The enabling bus master
was already done in the PCI enumeration process. Also INTR register is
RO. If these are not needed, we can simply this a lot.
> +}
> +
> int bridge_silicon_revision(void)
> {
> if (bridge_revision_id < 0) {
> @@ -213,14 +252,12 @@ static void sandybridge_setup_northbridge_bars(struct udevice *dev)
> dm_pci_write_config8(dev, PAM6, 0x33);
> }
>
> -static int bd82x6x_northbridge_probe(struct udevice *dev)
> +static int bd82x6x_northbridge_early_init(struct udevice *dev)
> {
> const int chipset_type = SANDYBRIDGE_MOBILE;
> u32 capid0_a;
> u8 reg8;
>
> - if (gd->flags & GD_FLG_RELOC)
> - return 0;
>
> /* Device ID Override Enable should be done very early */
> dm_pci_read_config32(dev, 0xe4, &capid0_a);
> @@ -242,6 +279,18 @@ static int bd82x6x_northbridge_probe(struct udevice *dev)
> return 0;
> }
>
> +static int bd82x6x_northbridge_probe(struct udevice *dev)
> +{
> + if (!(gd->flags & GD_FLG_RELOC))
> + return bd82x6x_northbridge_early_init(dev);
> +
> + bd82x6x_pci_init(PCH_DEV);
> + northbridge_enable(PCH_DEV);
> + northbridge_init(PCH_DEV);
> +
> + return 0;
> +}
> +
> static const struct udevice_id bd82x6x_northbridge_ids[] = {
> { .compatible = "intel,bd82x6x-northbridge" },
> { }
> diff --git a/arch/x86/include/asm/arch-ivybridge/bd82x6x.h b/arch/x86/include/asm/arch-ivybridge/bd82x6x.h
> index fc7fc6d..0f4fe47 100644
> --- a/arch/x86/include/asm/arch-ivybridge/bd82x6x.h
> +++ b/arch/x86/include/asm/arch-ivybridge/bd82x6x.h
> @@ -9,7 +9,6 @@
>
> void bd82x6x_sata_init(pci_dev_t dev, const void *blob, int node);
> void bd82x6x_sata_enable(pci_dev_t dev, const void *blob, int node);
> -void bd82x6x_pci_init(pci_dev_t dev);
> void bd82x6x_usb_ehci_init(pci_dev_t dev);
> void bd82x6x_usb_xhci_init(pci_dev_t dev);
> int gma_func0_init(struct udevice *dev, const void *blob, int node);
> diff --git a/board/google/chromebook_link/link.c b/board/google/chromebook_link/link.c
> index 1b97a8f..d12d742 100644
> --- a/board/google/chromebook_link/link.c
> +++ b/board/google/chromebook_link/link.c
> @@ -14,14 +14,6 @@
>
> int arch_early_init_r(void)
> {
> - struct udevice *dev;
> - int ret;
> -
> - /* Make sure the platform controller hub is up and running */
> - ret = uclass_get_device(UCLASS_PCH, 0, &dev);
> - if (ret)
> - return ret;
> -
> return 0;
> }
>
> --
Regards,
Bin
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