1 // SPDX-License-Identifier: GPL-2.0+ OR X11
3 * Copyright 2018-2020 NXP
5 * PCIe Gen4 driver for NXP Layerscape SoCs
6 * Author: Hou Zhiqiang <Minder.Hou@gmail.com>
12 #include <asm/arch/fsl_serdes.h>
15 #ifdef CONFIG_OF_BOARD_SETUP
16 #include <linux/libfdt.h>
17 #include <fdt_support.h>
19 #include <asm/arch/clock.h>
21 #include "pcie_layerscape_gen4.h"
22 #include "pcie_layerscape_fixup_common.h"
24 #if defined(CONFIG_FSL_LSCH3) || defined(CONFIG_FSL_LSCH2)
26 * Return next available LUT index.
28 static int ls_pcie_g4_next_lut_index(struct ls_pcie_g4 *pcie)
30 if (pcie->next_lut_index < PCIE_LUT_ENTRY_COUNT)
31 return pcie->next_lut_index++;
33 return -ENOSPC; /* LUT is full */
37 * Program a single LUT entry
39 static void ls_pcie_g4_lut_set_mapping(struct ls_pcie_g4 *pcie, int index,
40 u32 devid, u32 streamid)
42 /* leave mask as all zeroes, want to match all bits */
43 lut_writel(pcie, devid << 16, PCIE_LUT_UDR(index));
44 lut_writel(pcie, streamid | PCIE_LUT_ENABLE, PCIE_LUT_LDR(index));
48 * An msi-map is a property to be added to the pci controller
49 * node. It is a table, where each entry consists of 4 fields
52 * msi-map = <[devid] [phandle-to-msi-ctrl] [stream-id] [count]
53 * [devid] [phandle-to-msi-ctrl] [stream-id] [count]>;
55 static void fdt_pcie_set_msi_map_entry_ls_gen4(void *blob,
56 struct ls_pcie_g4 *pcie,
57 u32 devid, u32 streamid)
63 #ifdef CONFIG_FSL_PCIE_COMPAT
64 nodeoff = fdt_node_offset_by_compat_reg(blob, CONFIG_FSL_PCIE_COMPAT,
65 pcie->ccsr_res.start);
67 #error "No CONFIG_FSL_PCIE_COMPAT defined"
70 debug("%s: ERROR: failed to find pcie compatiable\n", __func__);
74 /* get phandle to MSI controller */
75 prop = (u32 *)fdt_getprop(blob, nodeoff, "msi-parent", 0);
77 debug("\n%s: ERROR: missing msi-parent: PCIe%d\n",
81 phandle = fdt32_to_cpu(*prop);
83 /* set one msi-map row */
84 fdt_appendprop_u32(blob, nodeoff, "msi-map", devid);
85 fdt_appendprop_u32(blob, nodeoff, "msi-map", phandle);
86 fdt_appendprop_u32(blob, nodeoff, "msi-map", streamid);
87 fdt_appendprop_u32(blob, nodeoff, "msi-map", 1);
91 * An iommu-map is a property to be added to the pci controller
92 * node. It is a table, where each entry consists of 4 fields
95 * iommu-map = <[devid] [phandle-to-iommu-ctrl] [stream-id] [count]
96 * [devid] [phandle-to-iommu-ctrl] [stream-id] [count]>;
98 static void fdt_pcie_set_iommu_map_entry_ls_gen4(void *blob,
99 struct ls_pcie_g4 *pcie,
100 u32 devid, u32 streamid)
107 #ifdef CONFIG_FSL_PCIE_COMPAT
108 nodeoff = fdt_node_offset_by_compat_reg(blob, CONFIG_FSL_PCIE_COMPAT,
109 pcie->ccsr_res.start);
111 #error "No CONFIG_FSL_PCIE_COMPAT defined"
114 debug("%s: ERROR: failed to find pcie compatiable\n", __func__);
118 /* get phandle to iommu controller */
119 prop = fdt_getprop_w(blob, nodeoff, "iommu-map", &lenp);
121 debug("\n%s: ERROR: missing iommu-map: PCIe%d\n",
122 __func__, pcie->idx);
126 /* set iommu-map row */
127 iommu_map[0] = cpu_to_fdt32(devid);
128 iommu_map[1] = *++prop;
129 iommu_map[2] = cpu_to_fdt32(streamid);
130 iommu_map[3] = cpu_to_fdt32(1);
133 fdt_setprop_inplace(blob, nodeoff, "iommu-map", iommu_map, 16);
135 fdt_appendprop(blob, nodeoff, "iommu-map", iommu_map, 16);
138 static void fdt_fixup_pcie_ls_gen4(void *blob)
140 struct udevice *dev, *bus;
141 struct ls_pcie_g4 *pcie;
146 /* Scan all known buses */
147 for (pci_find_first_device(&dev); dev; pci_find_next_device(&dev)) {
148 for (bus = dev; device_is_on_pci_bus(bus);)
150 pcie = dev_get_priv(bus);
152 streamid = pcie_next_streamid(pcie->stream_id_cur, pcie->idx);
154 debug("ERROR: no stream ids free\n");
157 pcie->stream_id_cur++;
160 index = ls_pcie_g4_next_lut_index(pcie);
162 debug("ERROR: no LUT indexes free\n");
166 /* the DT fixup must be relative to the hose first_busno */
167 bdf = dm_pci_get_bdf(dev) - PCI_BDF(bus->seq, 0, 0);
168 /* map PCI b.d.f to streamID in LUT */
169 ls_pcie_g4_lut_set_mapping(pcie, index, bdf >> 8, streamid);
170 /* update msi-map in device tree */
171 fdt_pcie_set_msi_map_entry_ls_gen4(blob, pcie, bdf >> 8,
173 /* update iommu-map in device tree */
174 fdt_pcie_set_iommu_map_entry_ls_gen4(blob, pcie, bdf >> 8,
180 static void ft_pcie_ep_layerscape_gen4_fix(void *blob, struct ls_pcie_g4 *pcie)
184 off = fdt_node_offset_by_compat_reg(blob, CONFIG_FSL_PCIE_EP_COMPAT,
185 pcie->ccsr_res.start);
188 debug("%s: ERROR: failed to find pcie compatiable\n",
193 if (pcie->enabled && pcie->mode == PCI_HEADER_TYPE_NORMAL)
194 fdt_set_node_status(blob, off, FDT_STATUS_OKAY, 0);
196 fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
199 static void ft_pcie_rc_layerscape_gen4_fix(void *blob, struct ls_pcie_g4 *pcie)
203 #ifdef CONFIG_FSL_PCIE_COMPAT
204 off = fdt_node_offset_by_compat_reg(blob, CONFIG_FSL_PCIE_COMPAT,
205 pcie->ccsr_res.start);
207 #error "No CONFIG_FSL_PCIE_COMPAT defined"
210 debug("%s: ERROR: failed to find pcie compatiable\n", __func__);
214 if (pcie->enabled && pcie->mode == PCI_HEADER_TYPE_BRIDGE)
215 fdt_set_node_status(blob, off, FDT_STATUS_OKAY, 0);
217 fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
220 static void ft_pcie_layerscape_gen4_setup(void *blob, struct ls_pcie_g4 *pcie)
222 ft_pcie_rc_layerscape_gen4_fix(blob, pcie);
223 ft_pcie_ep_layerscape_gen4_fix(blob, pcie);
226 /* Fixup Kernel DT for PCIe */
227 void ft_pci_setup_ls_gen4(void *blob, bd_t *bd)
229 struct ls_pcie_g4 *pcie;
231 list_for_each_entry(pcie, &ls_pcie_g4_list, list)
232 ft_pcie_layerscape_gen4_setup(blob, pcie);
234 #if defined(CONFIG_FSL_LSCH3) || defined(CONFIG_FSL_LSCH2)
235 fdt_fixup_pcie_ls_gen4(blob);
239 #else /* !CONFIG_OF_BOARD_SETUP */
240 void ft_pci_setup_ls_gen4(void *blob, bd_t *bd)