[U-Boot] [PATCHv3 09/15] pci: layerscape: add pci driver based on DM

[Zhiqiang Hou <Zhiqiang.Hou@nxp.com>]

From: Minghuan Lian <Minghuan.Lian@nxp.com>

There are more than five kinds of Layerscape SoCs. unfortunately,
PCIe controller of each SoC is a little bit different. In order
to avoid too many macro definitions, the patch addes a new
implementation of PCIe driver based on DM. PCIe dts node is
used to describe the difference.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
V3:
 - No change

 drivers/pci/Kconfig           |   8 +
 drivers/pci/pcie_layerscape.c | 761 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 769 insertions(+)

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index b8376b4..07d21ea 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -61,4 +61,12 @@ config PCI_XILINX
 	  Enable support for the Xilinx AXI bridge for PCI express, an IP block
 	  which can be used on some generations of Xilinx FPGAs.
 
+config PCIE_LAYERSCAPE
+	bool "Layerscape PCIe support"
+	depends on DM_PCI
+	help
+	  Support Layerscape PCIe. The Layerscape SoC may have one or several
+	  PCIe controllers. The PCIe may works in RC or EP mode according to
+	  RCW setting.
+
 endif
diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
index 2e6b986..f107d1c 100644
--- a/drivers/pci/pcie_layerscape.c
+++ b/drivers/pci/pcie_layerscape.c
@@ -11,11 +11,14 @@
 #include <asm/io.h>
 #include <errno.h>
 #include <malloc.h>
+#include <dm.h>
 #ifndef CONFIG_LS102XA
 #include <asm/arch/fdt.h>
 #include <asm/arch/soc.h>
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
 #define CONFIG_SYS_PCI_MEMORY_BUS CONFIG_SYS_SDRAM_BASE
 #endif
@@ -40,6 +43,7 @@
 #define PCIE_ATU_REGION_INDEX1		(0x1 << 0)
 #define PCIE_ATU_REGION_INDEX2		(0x2 << 0)
 #define PCIE_ATU_REGION_INDEX3		(0x3 << 0)
+#define PCIE_ATU_REGION_NUM		6
 #define PCIE_ATU_CR1			0x904
 #define PCIE_ATU_TYPE_MEM		(0x0 << 0)
 #define PCIE_ATU_TYPE_IO		(0x2 << 0)
@@ -58,6 +62,9 @@
 #define PCIE_ATU_FUNC(x)		(((x) & 0x7) << 16)
 #define PCIE_ATU_UPPER_TARGET		0x91C
 
+/* DBI registers */
+#define PCIE_SRIOV		0x178
+#define PCIE_STRFMR1		0x71c /* Symbol Timer & Filter Mask Register1 */
 #define PCIE_DBI_RO_WR_EN	0x8bc
 
 #define PCIE_LINK_CAP		0x7c
@@ -88,6 +95,8 @@
 #define PCIE_BAR2_SIZE		(4 * 1024) /* 4K */
 #define PCIE_BAR4_SIZE		(1 * 1024 * 1024) /* 1M */
 
+#ifndef CONFIG_DM_PCI
+
 struct ls_pcie {
 	int idx;
 	void __iomem *dbi;
@@ -814,3 +823,755 @@ void ft_pci_setup(void *blob, bd_t *bd)
 {
 }
 #endif
+
+#else
+
+/* LUT registers */
+#define PCIE_LUT_UDR(n)		(0x800 + (n) * 8)
+#define PCIE_LUT_LDR(n)		(0x804 + (n) * 8)
+#define PCIE_LUT_ENABLE		(1 << 31)
+#define PCIE_LUT_ENTRY_COUNT	32
+
+/* PF Controll registers */
+#define PCIE_PF_VF_CTRL		0x7F8
+#define PCIE_PF_DBG		0x7FC
+
+#define PCIE_SRDS_PRTCL(idx)	(PCIE1 + (idx))
+#define PCIE_SYS_BASE_ADDR	0x3400000
+#define PCIE_CCSR_SIZE		0x0100000
+
+/* CS2 */
+#define PCIE_CS2_OFFSET		0x1000 /* For PCIe without SR-IOV */
+
+#ifdef CONFIG_LS102XA
+/* LS1021a PCIE space */
+#define LS1021_PCIE_SPACE_OFFSET	0x4000000000ULL
+#define LS1021_PCIE_SPACE_SIZE		0x0800000000ULL
+
+/* LS1021a PEX1/2 Misc Ports Status Register */
+#define LS1021_PEXMSCPORTSR(pex_idx)	(0x94 + (pex_idx) * 4)
+#define LS1021_LTSSM_STATE_SHIFT	20
+#endif
+
+struct ls_pcie {
+	int idx;
+	struct list_head list;
+	struct udevice *bus;
+	struct fdt_resource dbi_res;
+	struct fdt_resource lut_res;
+	struct fdt_resource ctrl_res;
+	struct fdt_resource cfg_res;
+	void __iomem *dbi;
+	void __iomem *lut;
+	void __iomem *ctrl;
+	void __iomem *cfg0;
+	void __iomem *cfg1;
+	bool big_endian;
+	bool enabled;
+	int next_lut_index;
+	struct pci_controller hose;
+};
+
+static LIST_HEAD(ls_pcie_list);
+
+static unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset)
+{
+	return in_le32(pcie->dbi + offset);
+}
+
+static void dbi_writel(struct ls_pcie *pcie, unsigned int value,
+		       unsigned int offset)
+{
+	out_le32(pcie->dbi + offset, value);
+}
+
+#ifdef CONFIG_FSL_LSCH3
+static void lut_writel(struct ls_pcie *pcie, unsigned int value,
+		       unsigned int offset)
+{
+	if (pcie->big_endian)
+		out_be32(pcie->lut + offset, value);
+	else
+		out_le32(pcie->lut + offset, value);
+}
+#endif
+
+static unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset)
+{
+	if (pcie->big_endian)
+		return in_be32(pcie->ctrl + offset);
+	else
+		return in_le32(pcie->ctrl + offset);
+}
+
+static void ctrl_writel(struct ls_pcie *pcie, unsigned int value,
+			unsigned int offset)
+{
+	if (pcie->big_endian)
+		out_be32(pcie->ctrl + offset, value);
+	else
+		out_le32(pcie->ctrl + offset, value);
+}
+
+#ifdef CONFIG_LS102XA
+static int ls_pcie_ltssm(struct ls_pcie *pcie)
+{
+	u32 state;
+
+	state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx));
+	state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK;
+
+	return state;
+}
+#else
+static int ls_pcie_ltssm(struct ls_pcie *pcie)
+{
+	return ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK;
+}
+#endif
+
+static int ls_pcie_link_up(struct ls_pcie *pcie)
+{
+	int ltssm;
+
+	ltssm = ls_pcie_ltssm(pcie);
+	if (ltssm < LTSSM_PCIE_L0)
+		return 0;
+
+	return 1;
+}
+
+static void ls_pcie_cfg0_set_busdev(struct ls_pcie *pcie, u32 busdev)
+{
+	dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
+		   PCIE_ATU_VIEWPORT);
+	dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET);
+}
+
+static void ls_pcie_cfg1_set_busdev(struct ls_pcie *pcie, u32 busdev)
+{
+	dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
+		   PCIE_ATU_VIEWPORT);
+	dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET);
+}
+
+static void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type,
+				      u64 phys, u64 bus_addr, pci_size_t size)
+{
+	dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT);
+	dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE);
+	dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE);
+	dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT);
+	dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET);
+	dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET);
+	dbi_writel(pcie, type, PCIE_ATU_CR1);
+	dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
+}
+
+/* Use bar match mode and MEM type as default */
+static void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, int idx,
+				     int bar, u64 phys)
+{
+	dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT);
+	dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET);
+	dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET);
+	dbi_writel(pcie, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1);
+	dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE |
+		   PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2);
+}
+
+static void ls_pcie_dump_atu(struct ls_pcie *pcie)
+{
+	int i;
+
+	for (i = 0; i < PCIE_ATU_REGION_NUM; i++) {
+		dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | i,
+			   PCIE_ATU_VIEWPORT);
+		debug("iATU%d:\n", i);
+		debug("\tLOWER PHYS 0x%08x\n",
+		      dbi_readl(pcie, PCIE_ATU_LOWER_BASE));
+		debug("\tUPPER PHYS 0x%08x\n",
+		      dbi_readl(pcie, PCIE_ATU_UPPER_BASE));
+		debug("\tLOWER BUS  0x%08x\n",
+		      dbi_readl(pcie, PCIE_ATU_LOWER_TARGET));
+		debug("\tUPPER BUS  0x%08x\n",
+		      dbi_readl(pcie, PCIE_ATU_UPPER_TARGET));
+		debug("\tLIMIT      0x%08x\n",
+		      readl(pcie->dbi + PCIE_ATU_LIMIT));
+		debug("\tCR1        0x%08x\n",
+		      dbi_readl(pcie, PCIE_ATU_CR1));
+		debug("\tCR2        0x%08x\n",
+		      dbi_readl(pcie, PCIE_ATU_CR2));
+	}
+}
+
+static void ls_pcie_setup_atu(struct ls_pcie *pcie)
+{
+	struct pci_region *io, *mem, *pref;
+	unsigned long long offset = 0;
+	int idx = 0;
+
+#ifdef CONFIG_LS102XA
+	offset = LS1021_PCIE_SPACE_OFFSET + LS1021_PCIE_SPACE_SIZE * pcie->idx;
+#endif
+
+	/* ATU 0 : OUTBOUND : CFG0 */
+	ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0,
+				 PCIE_ATU_TYPE_CFG0,
+				 pcie->cfg_res.start + offset,
+				 0,
+				 fdt_resource_size(&pcie->cfg_res) / 2);
+	/* ATU 1 : OUTBOUND : CFG1 */
+	ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1,
+				 PCIE_ATU_TYPE_CFG1,
+				 pcie->cfg_res.start + offset +
+				 fdt_resource_size(&pcie->cfg_res) / 2,
+				 0,
+				 fdt_resource_size(&pcie->cfg_res) / 2);
+
+	pci_get_regions(pcie->bus, &io, &mem, &pref);
+	idx = PCIE_ATU_REGION_INDEX1 + 1;
+
+	if (io)
+		/* ATU : OUTBOUND : IO */
+		ls_pcie_atu_outbound_set(pcie, idx++,
+					 PCIE_ATU_TYPE_IO,
+					 io->phys_start + offset,
+					 io->bus_start,
+					 io->size);
+
+	if (mem)
+		/* ATU : OUTBOUND : MEM */
+		ls_pcie_atu_outbound_set(pcie, idx++,
+					 PCIE_ATU_TYPE_MEM,
+					 mem->phys_start + offset,
+					 mem->bus_start,
+					 mem->size);
+
+	if (pref)
+		/* ATU : OUTBOUND : pref */
+		ls_pcie_atu_outbound_set(pcie, idx++,
+					 PCIE_ATU_TYPE_MEM,
+					 pref->phys_start + offset,
+					 pref->bus_start,
+					 pref->size);
+
+	ls_pcie_dump_atu(pcie);
+}
+
+static int ls_pcie_addr_valid(struct ls_pcie *pcie, pci_dev_t bdf)
+{
+	struct udevice *bus = pcie->bus;
+
+	if (!pcie->enabled)
+		return -ENODEV;
+
+	if (PCI_BUS(bdf) < bus->seq)
+		return -EINVAL;
+
+	if ((PCI_BUS(bdf) > bus->seq) && (!ls_pcie_link_up(pcie)))
+		return -EINVAL;
+
+	if (PCI_BUS(bdf) <= (bus->seq + 1) && (PCI_DEV(bdf) > 0))
+		return -EINVAL;
+
+	return 0;
+}
+
+void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf,
+				   int offset)
+{
+	struct udevice *bus = pcie->bus;
+	u32 busdev;
+
+	if (PCI_BUS(bdf) == bus->seq)
+		return pcie->dbi + offset;
+
+	busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) |
+		 PCIE_ATU_DEV(PCI_DEV(bdf)) |
+		 PCIE_ATU_FUNC(PCI_FUNC(bdf));
+
+	if (PCI_BUS(bdf) == bus->seq + 1) {
+		ls_pcie_cfg0_set_busdev(pcie, busdev);
+		return pcie->cfg0 + offset;
+	} else {
+		ls_pcie_cfg1_set_busdev(pcie, busdev);
+		return pcie->cfg1 + offset;
+	}
+}
+
+static int ls_pcie_read_config(struct udevice *bus, pci_dev_t bdf,
+			       uint offset, ulong *valuep,
+			       enum pci_size_t size)
+{
+	struct ls_pcie *pcie = dev_get_priv(bus);
+	void *address;
+
+	if (ls_pcie_addr_valid(pcie, bdf)) {
+		*valuep = pci_get_ff(size);
+		return 0;
+	}
+
+	address = ls_pcie_conf_address(pcie, bdf, offset);
+
+	switch (size) {
+	case PCI_SIZE_8:
+		*valuep = readb(address);
+		return 0;
+	case PCI_SIZE_16:
+		*valuep = readw(address);
+		return 0;
+	case PCI_SIZE_32:
+		*valuep = readl(address);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
+				uint offset, ulong value,
+				enum pci_size_t size)
+{
+	struct ls_pcie *pcie = dev_get_priv(bus);
+	void *address;
+
+	if (ls_pcie_addr_valid(pcie, bdf))
+		return 0;
+
+	address = ls_pcie_conf_address(pcie, bdf, offset);
+
+	switch (size) {
+	case PCI_SIZE_8:
+		writeb(value, address);
+		return 0;
+	case PCI_SIZE_16:
+		writew(value, address);
+		return 0;
+	case PCI_SIZE_32:
+		writel(value, address);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+/* Clear multi-function bit */
+static void ls_pcie_clear_multifunction(struct ls_pcie *pcie)
+{
+	writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE);
+}
+
+/* Fix class value */
+static void ls_pcie_fix_class(struct ls_pcie *pcie)
+{
+	writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE);
+}
+
+/* Drop MSG TLP except for Vendor MSG */
+static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
+{
+	u32 val;
+
+	val = dbi_readl(pcie, PCIE_STRFMR1);
+	val &= 0xDFFFFFFF;
+	dbi_writel(pcie, val, PCIE_STRFMR1);
+}
+
+/* Disable all bars in RC mode */
+static void ls_pcie_disable_bars(struct ls_pcie *pcie)
+{
+	u32 sriov;
+
+	sriov = in_le32(pcie->dbi + PCIE_SRIOV);
+
+	if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV)
+		return;
+
+	dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0);
+	dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1);
+	dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1);
+}
+
+static void ls_pcie_setup_ctrl(struct ls_pcie *pcie)
+{
+	ls_pcie_setup_atu(pcie);
+
+	dbi_writel(pcie, 1, PCIE_DBI_RO_WR_EN);
+	ls_pcie_fix_class(pcie);
+	ls_pcie_clear_multifunction(pcie);
+	ls_pcie_drop_msg_tlp(pcie);
+	dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN);
+
+	ls_pcie_disable_bars(pcie);
+}
+
+static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie)
+{
+	u64 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE;
+
+	/* ATU 0 : INBOUND : map BAR0 */
+	ls_pcie_atu_inbound_set(pcie, 0, 0, phys);
+	/* ATU 1 : INBOUND : map BAR1 */
+	phys += PCIE_BAR1_SIZE;
+	ls_pcie_atu_inbound_set(pcie, 1, 1, phys);
+	/* ATU 2 : INBOUND : map BAR2 */
+	phys += PCIE_BAR2_SIZE;
+	ls_pcie_atu_inbound_set(pcie, 2, 2, phys);
+	/* ATU 3 : INBOUND : map BAR4 */
+	phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + PCIE_BAR4_SIZE;
+	ls_pcie_atu_inbound_set(pcie, 3, 4, phys);
+
+	/* ATU 0 : OUTBOUND : map MEM */
+	ls_pcie_atu_outbound_set(pcie, 0,
+				 PCIE_ATU_TYPE_MEM,
+				 pcie->cfg_res.start,
+				 0,
+				 CONFIG_SYS_PCI_MEMORY_SIZE);
+}
+
+/* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */
+static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
+{
+	if (size < 4 * 1024)
+		return;
+
+	switch (bar) {
+	case 0:
+		writel(size - 1, bar_base + PCI_BASE_ADDRESS_0);
+		break;
+	case 1:
+		writel(size - 1, bar_base + PCI_BASE_ADDRESS_1);
+		break;
+	case 2:
+		writel(size - 1, bar_base + PCI_BASE_ADDRESS_2);
+		writel(0, bar_base + PCI_BASE_ADDRESS_3);
+		break;
+	case 4:
+		writel(size - 1, bar_base + PCI_BASE_ADDRESS_4);
+		writel(0, bar_base + PCI_BASE_ADDRESS_5);
+		break;
+	default:
+		break;
+	}
+}
+
+static void ls_pcie_ep_setup_bars(void *bar_base)
+{
+	/* BAR0 - 32bit - 4K configuration */
+	ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
+	/* BAR1 - 32bit - 8K MSIX*/
+	ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
+	/* BAR2 - 64bit - 4K MEM desciptor */
+	ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
+	/* BAR4 - 64bit - 1M MEM*/
+	ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
+}
+
+static void ls_pcie_setup_ep(struct ls_pcie *pcie)
+{
+	u32 sriov;
+
+	sriov = readl(pcie->dbi + PCIE_SRIOV);
+	if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
+		int pf, vf;
+
+		for (pf = 0; pf < PCIE_PF_NUM; pf++) {
+			for (vf = 0; vf <= PCIE_VF_NUM; vf++) {
+				ctrl_writel(pcie, PCIE_LCTRL0_VAL(pf, vf),
+					    PCIE_PF_VF_CTRL);
+
+				ls_pcie_ep_setup_bars(pcie->dbi);
+				ls_pcie_ep_setup_atu(pcie);
+			}
+		}
+		/* Disable CFG2 */
+		ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL);
+	} else {
+		ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE);
+		ls_pcie_ep_setup_atu(pcie);
+	}
+}
+
+#ifdef CONFIG_FSL_LSCH3
+/*
+ * Return next available LUT index.
+ */
+static int ls_pcie_next_lut_index(struct ls_pcie *pcie)
+{
+	if (pcie->next_lut_index < PCIE_LUT_ENTRY_COUNT)
+		return pcie->next_lut_index++;
+	else
+		return -1;  /* LUT is full */
+}
+
+/*
+ * Program a single LUT entry
+ */
+static void ls_pcie_lut_set_mapping(struct ls_pcie *pcie, int index, u32 devid,
+				    u32 streamid)
+{
+	/* leave mask as all zeroes, want to match all bits */
+	lut_writel(pcie, devid << 16, PCIE_LUT_UDR(index));
+	lut_writel(pcie, streamid | PCIE_LUT_ENABLE, PCIE_LUT_LDR(index));
+}
+
+/* returns the next available streamid */
+static u32 ls_pcie_next_streamid(void)
+{
+	static int next_stream_id = FSL_PEX_STREAM_ID_START;
+
+	if (next_stream_id > FSL_PEX_STREAM_ID_END)
+		return 0xffffffff;
+
+	return next_stream_id++;
+}
+
+/*
+ * An msi-map is a property to be added to the pci controller
+ * node.  It is a table, where each entry consists of 4 fields
+ * e.g.:
+ *
+ *      msi-map = <[devid] [phandle-to-msi-ctrl] [stream-id] [count]
+ *                 [devid] [phandle-to-msi-ctrl] [stream-id] [count]>;
+ */
+static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie,
+				       u32 devid, u32 streamid)
+{
+	u32 *prop;
+	u32 phandle;
+	int nodeoffset;
+
+	/* find pci controller node */
+	nodeoffset = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
+						   pcie->dbi_res.start);
+	if (nodeoffset < 0) {
+	#ifdef FSL_PCIE_COMPAT /* Compatible with older version of dts node */
+		nodeoffset = fdt_node_offset_by_compat_reg(blob,
+							   FSL_PCIE_COMPAT,
+							   pcie->dbi_res.start);
+		if (nodeoffset < 0)
+			return;
+	#else
+		return;
+	#endif
+	}
+
+	/* get phandle to MSI controller */
+	prop = (u32 *)fdt_getprop(blob, nodeoffset, "msi-parent", 0);
+	if (prop == NULL) {
+		printf("\n%s: ERROR: missing msi-parent: PCIe%d\n",
+		       __func__, pcie->idx);
+		return;
+	}
+	phandle = be32_to_cpu(*prop);
+
+	/* set one msi-map row */
+	fdt_appendprop_u32(blob, nodeoffset, "msi-map", devid);
+	fdt_appendprop_u32(blob, nodeoffset, "msi-map", phandle);
+	fdt_appendprop_u32(blob, nodeoffset, "msi-map", streamid);
+	fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1);
+}
+
+static void fdt_fixup_pcie(void *blob)
+{
+	struct udevice *dev, *bus;
+	struct ls_pcie *pcie;
+	u32 streamid;
+	int index;
+	pci_dev_t bdf;
+
+	/* Scan all known buses */
+	for (pci_find_first_device(&dev);
+	     dev;
+	     pci_find_next_device(&dev)) {
+		for (bus = dev; device_is_on_pci_bus(bus);)
+			bus = bus->parent;
+		pcie = dev_get_priv(bus);
+
+		streamid = ls_pcie_next_streamid();
+		if (streamid == 0xffffffff) {
+			printf("ERROR: no stream ids free\n");
+			continue;
+		}
+
+		index = ls_pcie_next_lut_index(pcie);
+		if (index < 0) {
+			printf("ERROR: no LUT indexes free\n");
+			continue;
+		}
+
+		/* the DT fixup must be relative to the hose first_busno */
+		bdf = dm_pci_get_bdf(dev) - PCI_BDF(bus->seq, 0, 0);
+		/* map PCI b.d.f to streamID in LUT */
+		ls_pcie_lut_set_mapping(pcie, index, bdf >> 8,
+					streamid);
+		/* update msi-map in device tree */
+		fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8,
+					   streamid);
+	}
+}
+#endif
+
+#ifdef CONFIG_OF_BOARD_SETUP
+#include <libfdt.h>
+#include <fdt_support.h>
+
+static void ft_pcie_ls_setup(void *blob, struct ls_pcie *pcie)
+{
+	int off;
+
+	off = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
+					    pcie->dbi_res.start);
+	if (off < 0) {
+	#ifdef FSL_PCIE_COMPAT /* Compatible with older version of dts node */
+		off = fdt_node_offset_by_compat_reg(blob,
+						    FSL_PCIE_COMPAT,
+						    pcie->dbi_res.start);
+		if (off < 0)
+			return;
+	#else
+		return;
+	#endif
+	}
+
+	if (pcie->enabled)
+		fdt_set_node_status(blob, off, FDT_STATUS_OKAY, 0);
+	else
+		fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
+}
+
+void ft_pci_setup(void *blob, bd_t *bd)
+{
+	struct ls_pcie *pcie;
+
+	list_for_each_entry(pcie, &ls_pcie_list, list)
+		ft_pcie_ls_setup(blob, pcie);
+
+	#ifdef CONFIG_FSL_LSCH3
+	fdt_fixup_pcie(blob);
+	#endif
+}
+
+#else
+void ft_pci_setup(void *blob, bd_t *bd)
+{
+}
+#endif
+
+static int ls_pcie_probe(struct udevice *dev)
+{
+	struct ls_pcie *pcie = dev_get_priv(dev);
+	void *fdt = (void *)gd->fdt_blob;
+	int node = dev->of_offset;
+	u8 header_type;
+	u16 link_sta;
+	bool ep_mode;
+	int ret;
+
+	pcie->bus = dev;
+
+	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+				     "dbi", &pcie->dbi_res);
+	if (ret) {
+		printf("ls-pcie: resource \"dbi\" not found\n");
+		return ret;
+	}
+
+	pcie->idx = (pcie->dbi_res.start - PCIE_SYS_BASE_ADDR) / PCIE_CCSR_SIZE;
+
+	list_add(&pcie->list, &ls_pcie_list);
+
+	pcie->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx));
+	if (!pcie->enabled) {
+		printf("PCIe%d: %s disabled\n", pcie->idx, dev->name);
+		return 0;
+	}
+
+	pcie->dbi = map_physmem(pcie->dbi_res.start,
+				fdt_resource_size(&pcie->dbi_res),
+				MAP_NOCACHE);
+
+	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+				     "lut", &pcie->lut_res);
+	if (!ret)
+		pcie->lut = map_physmem(pcie->lut_res.start,
+					fdt_resource_size(&pcie->lut_res),
+					MAP_NOCACHE);
+
+	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+				     "ctrl", &pcie->ctrl_res);
+	if (!ret)
+		pcie->ctrl = map_physmem(pcie->ctrl_res.start,
+					 fdt_resource_size(&pcie->ctrl_res),
+					 MAP_NOCACHE);
+	if (!pcie->ctrl)
+		pcie->ctrl = pcie->lut;
+
+	if (!pcie->ctrl) {
+		printf("%s: NOT find CTRL\n", dev->name);
+		return 0;
+	}
+
+	ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+				     "config", &pcie->cfg_res);
+	if (ret) {
+		printf("%s: resource \"config\" not found\n", dev->name);
+		return 0;
+	}
+
+	pcie->cfg0 = map_physmem(pcie->cfg_res.start,
+				 fdt_resource_size(&pcie->cfg_res),
+				 MAP_NOCACHE);
+	pcie->cfg1 = pcie->cfg0 + fdt_resource_size(&pcie->cfg_res) / 2;
+
+	pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian");
+
+	debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n",
+	      dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut,
+	      (unsigned long)pcie->ctrl, (unsigned long)pcie->cfg0,
+	      pcie->big_endian);
+
+	header_type = readb(pcie->dbi + PCI_HEADER_TYPE);
+	ep_mode = (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL;
+	printf("PCIe%u: %s %s", pcie->idx, dev->name,
+	       ep_mode ? "Endpoint" : "Root Complex");
+
+	if (ep_mode)
+		ls_pcie_setup_ep(pcie);
+	else
+		ls_pcie_setup_ctrl(pcie);
+
+	if (!ls_pcie_link_up(pcie)) {
+		/* Let the user know there's no PCIe link */
+		printf(": no link\n");
+		return 0;
+	}
+
+	/* Print the negotiated PCIe link width */
+	link_sta = readw(pcie->dbi + PCIE_LINK_STA);
+	printf(": x%d gen%d\n", (link_sta & 0x3f0) >> 4, link_sta & 0xf);
+
+	return 0;
+}
+
+static const struct dm_pci_ops ls_pcie_ops = {
+	.read_config	= ls_pcie_read_config,
+	.write_config	= ls_pcie_write_config,
+};
+
+static const struct udevice_id ls_pcie_ids[] = {
+	{ .compatible = "fsl,ls-pcie" },
+	{ }
+};
+
+U_BOOT_DRIVER(pci_layerscape) = {
+	.name = "pci_layerscape",
+	.id = UCLASS_PCI,
+	.of_match = ls_pcie_ids,
+	.ops = &ls_pcie_ops,
+	.probe	= ls_pcie_probe,
+	.priv_auto_alloc_size = sizeof(struct ls_pcie),
+};
+
+#endif /* CONFIG_DM_PCI */
-- 
2.1.0.27.g96db324