[U-Boot,v1] pci: add DM based mpc85xx driver
diff mbox series

Message ID 20190716033557.1556499-1-hs@denx.de
State New
Delegated to: Prabhakar Kushwaha
Headers show
Series
  • [U-Boot,v1] pci: add DM based mpc85xx driver
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Commit Message

Heiko Schocher July 16, 2019, 3:35 a.m. UTC
add DM based PCI Configuration space access support for
MPC85xx PCI Bridge

Signed-off-by: Heiko Schocher <hs@denx.de>

---
Travis build, see:
https://travis-ci.org/hsdenx/u-boot-test/builds/558855544

 MAINTAINERS               |   5 ++
 drivers/pci/Kconfig       |   7 ++
 drivers/pci/Makefile      |   1 +
 drivers/pci/pci_mpc85xx.c | 132 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 145 insertions(+)
 create mode 100644 drivers/pci/pci_mpc85xx.c

Patch
diff mbox series

diff --git a/MAINTAINERS b/MAINTAINERS
index e91684191f..01faa67a6d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -639,6 +639,11 @@  S:	Maintained
 F:	drivers/pci_endpoint/
 F:  include/pci_ep.h
 
+PCI MPC85xx
+M:	Heiko Schocher <hs@denx.de>
+S:	Maintained
+F:	drivers/pci/pci_mpc85xx.c
+
 POWER
 M:	Jaehoon Chung <jh80.chung@samsung.com>
 S:	Maintained
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 3fe38f7315..88db0067b4 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -68,6 +68,13 @@  config PCIE_FSL
 	  PowerPC MPC85xx, MPC86xx, B series, P series and T series SoCs.
 	  This driver does not support SRIO_PCIE_BOOT feature.
 
+config PCI_MPC85XX
+	bool "MPC85XX PowerPC PCI support"
+	depends on DM_PCI
+	help
+	  Say Y here if you want to enable PCI controller support on FSL
+	  PowerPC MPC85xx SoC.
+
 config PCI_RCAR_GEN2
 	bool "Renesas RCar Gen2 PCIe driver"
 	depends on DM_PCI
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index b5ebd50c85..929f119fb3 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -19,6 +19,7 @@  obj-$(CONFIG_PCIE_ECAM_GENERIC) += pcie_ecam_generic.o
 obj-$(CONFIG_FSL_PCI_INIT) += fsl_pci_init.o
 obj-$(CONFIG_PCI_INDIRECT_BRIDGE) += pci_indirect.o
 obj-$(CONFIG_PCI_GT64120) += pci_gt64120.o
+obj-$(CONFIG_PCI_MPC85XX) += pci_mpc85xx.o
 obj-$(CONFIG_PCI_MSC01) += pci_msc01.o
 obj-$(CONFIG_PCIE_IMX) += pcie_imx.o
 obj-$(CONFIG_FTPCI100) += pci_ftpci100.o
diff --git a/drivers/pci/pci_mpc85xx.c b/drivers/pci/pci_mpc85xx.c
new file mode 100644
index 0000000000..c0d35f7f2c
--- /dev/null
+++ b/drivers/pci/pci_mpc85xx.c
@@ -0,0 +1,132 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2019
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ */
+#include <common.h>
+#include <asm/cpm_85xx.h>
+#include <pci.h>
+#include <dm.h>
+
+struct mpc85xx_pci_priv {
+	void __iomem		*cfg_addr;
+	void __iomem		*cfg_data;
+};
+
+static int mpc85xx_pci_dm_read_config(struct udevice *dev, pci_dev_t bdf,
+				      uint offset, ulong *value,
+				      enum pci_size_t size)
+{
+	struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
+	u32 addr;
+
+	addr = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
+	out_be32(priv->cfg_addr, addr);
+	sync();
+	*value = pci_conv_32_to_size(in_le32(priv->cfg_data), offset, size);
+
+	return 0;
+}
+
+static int mpc85xx_pci_dm_write_config(struct udevice *dev, pci_dev_t bdf,
+				       uint offset, ulong value,
+				       enum pci_size_t size)
+{
+	struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
+	u32 addr;
+
+	addr = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
+	out_be32(priv->cfg_addr, addr);
+	sync();
+	out_le32(priv->cfg_data, pci_conv_size_to_32(0, value, offset, size));
+
+	return 0;
+}
+
+static int mpc85xx_pci_dm_probe(struct udevice *dev)
+{
+	struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
+	struct pci_region *io;
+	struct pci_region *mem;
+	struct pci_region *pre;
+	int ret;
+	ccsr_pcix_t *pcix;
+
+	ret = pci_get_regions(dev, &io, &mem, &pre);
+	if (ret != 2) {
+		printf("%s: wrong count of regions %d only 2 allowed\n",
+		       __func__, ret);
+		return -EINVAL;
+	}
+
+	pcix = priv->cfg_addr;
+	/* BAR 1: memory */
+	out_be32(&pcix->potar1, (mem->bus_start >> 12) & 0x000fffff);
+	out_be32(&pcix->potear1, 0);
+	out_be32(&pcix->powbar1, (mem->phys_start >> 12) & 0x000fffff);
+	out_be32(&pcix->powbear1, 0);
+	out_be32(&pcix->powar1, (POWAR_EN | POWAR_MEM_READ |
+		 POWAR_MEM_WRITE | (__ilog2(mem->size) - 1)));
+
+	/* BAR 1: IO */
+	out_be32(&pcix->potar2, (io->bus_start >> 12) & 0x000fffff);
+	out_be32(&pcix->potear2, 0);
+	out_be32(&pcix->powbar2, (io->phys_start >> 12) & 0x000fffff);
+	out_be32(&pcix->powbear2, 0);
+	out_be32(&pcix->powar2, (POWAR_EN | POWAR_IO_READ |
+		 POWAR_IO_WRITE | (__ilog2(io->size) - 1)));
+
+	out_be32(&pcix->pitar1, 0);
+	out_be32(&pcix->piwbar1, 0);
+	out_be32(&pcix->piwar1, (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
+		 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G));
+
+	out_be32(&pcix->powar3, 0);
+	out_be32(&pcix->powar4, 0);
+	out_be32(&pcix->piwar2, 0);
+	out_be32(&pcix->piwar3, 0);
+
+	return 0;
+}
+
+static int mpc85xx_pci_dm_remove(struct udevice *dev)
+{
+	return 0;
+}
+
+static int mpc85xx_pci_ofdata_to_platdata(struct udevice *dev)
+{
+	struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
+
+	addr = devfdt_get_addr_index(dev, 0);
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+	priv->cfg_addr = (void __iomem *)addr;
+	addr += 4;
+	priv->cfg_data = (void __iomem *)addr;
+
+	return 0;
+}
+
+static const struct dm_pci_ops mpc85xx_pci_ops = {
+	.read_config	= mpc85xx_pci_dm_read_config,
+	.write_config	= mpc85xx_pci_dm_write_config,
+};
+
+static const struct udevice_id mpc85xx_pci_ids[] = {
+	{ .compatible = "fsl,mpc8540-pci" },
+	{ }
+};
+
+U_BOOT_DRIVER(mpc85xx_pci) = {
+	.name			= "mpc85xx_pci",
+	.id			= UCLASS_PCI,
+	.of_match		= mpc85xx_pci_ids,
+	.ops			= &mpc85xx_pci_ops,
+	.probe			= mpc85xx_pci_dm_probe,
+	.remove			= mpc85xx_pci_dm_remove,
+	.ofdata_to_platdata	= mpc85xx_pci_ofdata_to_platdata,
+	.priv_auto_alloc_size	= sizeof(struct mpc85xx_pci_priv),
+};