pci: Add defines for normal and subtractive PCI bridges

Add following two new PCI class codes defines into pci_ids.h include file:

  PCI_CLASS_BRIDGE_PCI_NORMAL
  PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE

And use these defines in all U-Boot code for describing PCI class codes for
normal and subtractive PCI bridges.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

board/armltd/vexpress64/pcie.c

@@ -150,7 +150,7 @@ static void xr3pci_init(void)
 	/* allow ECRC */
 	writel(0x6006, XR3_CONFIG_BASE + XR3PCI_PEX_SPC2);
 	/* setup the correct class code for the host bridge */
-	writel(PCI_CLASS_BRIDGE_PCI << 16, XR3_CONFIG_BASE + XR3PCI_BRIDGE_PCI_IDS);
+	writel(PCI_CLASS_BRIDGE_PCI_NORMAL << 8, XR3_CONFIG_BASE + XR3PCI_BRIDGE_PCI_IDS);
 
 	/* reset phy and root complex */
 	writel(JUNO_RESET_CTRL_PHY | JUNO_RESET_CTRL_RC,

drivers/pci/pci-aardvark.c

@@ -800,7 +800,7 @@ static int pcie_advk_setup_hw(struct pcie_advk *pcie)
 	 */
 	reg = advk_readl(pcie, ADVK_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
 	reg &= ~0xffffff00;
-	reg |= (PCI_CLASS_BRIDGE_PCI << 8) << 8;
+	reg |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
 	advk_writel(pcie, reg, ADVK_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
 
 	/* Enable generation and checking of ECRC on PCIe Root Port */

drivers/pci/pci-rcar-gen3.c

@@ -289,7 +289,7 @@ static int rcar_gen3_pcie_hw_init(struct udevice *dev)
 	 * class to match. Hardware takes care of propagating the IDSETR
 	 * settings, so there is no need to bother with a quirk.
 	 */
-	writel(PCI_CLASS_BRIDGE_PCI << 16, priv->regs + IDSETR1);
+	writel(PCI_CLASS_BRIDGE_PCI_NORMAL << 8, priv->regs + IDSETR1);
 
 	/*
 	 * Setup Secondary Bus Number & Subordinate Bus Number, even though

drivers/pci/pci_mvebu.c

@@ -440,7 +440,7 @@ static int mvebu_pcie_probe(struct udevice *dev)
 	 */
 	reg = readl(pcie->base + MVPCIE_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
 	reg &= ~0xffffff00;
-	reg |= (PCI_CLASS_BRIDGE_PCI << 8) << 8;
+	reg |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
 	writel(reg, pcie->base + MVPCIE_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
 
 	/*

drivers/pci/pci_tegra.c

@@ -325,8 +325,8 @@ static int pci_tegra_read_config(const struct udevice *bus, pci_dev_t bdf,
 	/* fixup root port class */
 	if (PCI_BUS(bdf) == 0) {
 		if ((offset & ~3) == PCI_CLASS_REVISION) {
-			value &= ~0x00ff0000;
-			value |= PCI_CLASS_BRIDGE_PCI << 16;
+			value &= ~0x00ffff00;
+			value |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
 		}
 	}
 #endif

drivers/pci/pcie_dw_mvebu.c

@@ -539,9 +539,9 @@ static int pcie_dw_mvebu_probe(struct udevice *dev)
 				  PCIE_ATU_TYPE_MEM, pcie->mem.phys_start,
 				  pcie->mem.bus_start, pcie->mem.size);
 
-	/* Set the CLASS_REV of RC CFG header to PCI_CLASS_BRIDGE_PCI */
+	/* Set the CLASS_REV of RC CFG header to PCI_CLASS_BRIDGE_PCI_NORMAL */
 	clrsetbits_le32(pcie->ctrl_base + PCI_CLASS_REVISION,
-			0xffff << 16, PCI_CLASS_BRIDGE_PCI << 16);
+			0xffffff << 8, PCI_CLASS_BRIDGE_PCI_NORMAL << 8);
 
 	pcie_dw_set_host_bars(pcie->ctrl_base);
 

drivers/pci/pcie_fsl.c

@@ -532,7 +532,7 @@ static int fsl_pcie_fixup_classcode(struct fsl_pcie *pcie)
 
 	fsl_pcie_hose_read_config_dword(pcie, classcode_reg, &val);
 	val &= 0xff;
-	val |= PCI_CLASS_BRIDGE_PCI << 16;
+	val |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
 	fsl_pcie_hose_write_config_dword(pcie, classcode_reg, val);
 
 	if (pcie->block_rev >= PEX_IP_BLK_REV_3_0)

drivers/pci/pcie_imx.c

@@ -300,9 +300,9 @@ static int imx_pcie_regions_setup(struct imx_pcie_priv *priv)
 	setbits_le32(priv->dbi_base + PCI_COMMAND,
 		     PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 
-	/* Set the CLASS_REV of RC CFG header to PCI_CLASS_BRIDGE_PCI */
+	/* Set the CLASS_REV of RC CFG header to PCI_CLASS_BRIDGE_PCI_NORMAL */
 	setbits_le32(priv->dbi_base + PCI_CLASS_REVISION,
-		     PCI_CLASS_BRIDGE_PCI << 16);
+		     PCI_CLASS_BRIDGE_PCI_NORMAL << 8);
 
 	/* Region #0 is used for Outbound CFG space access. */
 	writel(0, priv->dbi_base + PCIE_ATU_VIEWPORT);

drivers/pci/pcie_iproc.c

@@ -1123,7 +1123,7 @@ static int iproc_pcie_check_link(struct iproc_pcie *pcie)
 				    PCI_BRIDGE_CTRL_REG_OFFSET,
 				    4, &class);
 	class &= ~PCI_BRIDGE_CTRL_REG_CLASS_MASK;
-	class |= (PCI_CLASS_BRIDGE_PCI << 8);
+	class |= PCI_CLASS_BRIDGE_PCI_NORMAL;
 	iproc_pci_raw_config_write32(pcie, 0,
 				     PCI_BRIDGE_CTRL_REG_OFFSET,
 				     4, class);

drivers/pci/pcie_rockchip.c

@@ -351,7 +351,7 @@ static int rockchip_pcie_init_port(struct udevice *dev)
 
 	/* Initialize Root Complex registers. */
 	writel(PCIE_LM_VENDOR_ROCKCHIP, priv->apb_base + PCIE_LM_VENDOR_ID);
-	writel(PCI_CLASS_BRIDGE_PCI << 16,
+	writel(PCI_CLASS_BRIDGE_PCI_NORMAL << 8,
 	       priv->apb_base + PCIE_RC_BASE + PCI_CLASS_REVISION);
 	writel(PCIE_LM_RCBARPIE | PCIE_LM_RCBARPIS,
 	       priv->apb_base + PCIE_LM_RCBAR);

include/pci_ids.h

@@ -55,6 +55,8 @@
 #define PCI_CLASS_BRIDGE_EISA		0x0602
 #define PCI_CLASS_BRIDGE_MC		0x0603
 #define PCI_CLASS_BRIDGE_PCI		0x0604
+#define PCI_CLASS_BRIDGE_PCI_NORMAL		0x060400
+#define PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE	0x060401
 #define PCI_CLASS_BRIDGE_PCMCIA		0x0605
 #define PCI_CLASS_BRIDGE_NUBUS		0x0606
 #define PCI_CLASS_BRIDGE_CARDBUS	0x0607