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Hou Zhiqianga7294ab2016-12-13 14:54:16 +08001/*
Priyanka Jaine809e742017-04-27 15:08:06 +05302 * Copyright 2017 NXP
Hou Zhiqianga7294ab2016-12-13 14:54:16 +08003 * Copyright 2014-2015 Freescale Semiconductor, Inc.
4 * Layerscape PCIe driver
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9#include <common.h>
10#include <pci.h>
11#include <asm/arch/fsl_serdes.h>
12#include <asm/io.h>
13#include <errno.h>
14#ifdef CONFIG_OF_BOARD_SETUP
15#include <libfdt.h>
16#include <fdt_support.h>
Simon Glass6e2941d2017-05-17 08:23:06 -060017#ifdef CONFIG_ARM
18#include <asm/arch/clock.h>
19#endif
Hou Zhiqianga7294ab2016-12-13 14:54:16 +080020#include "pcie_layerscape.h"
21
Bharat Bhushan47d17362017-03-22 12:06:30 +053022#if defined(CONFIG_FSL_LSCH3) || defined(CONFIG_FSL_LSCH2)
Hou Zhiqianga7294ab2016-12-13 14:54:16 +080023/*
24 * Return next available LUT index.
25 */
26static int ls_pcie_next_lut_index(struct ls_pcie *pcie)
27{
28 if (pcie->next_lut_index < PCIE_LUT_ENTRY_COUNT)
29 return pcie->next_lut_index++;
30 else
31 return -ENOSPC; /* LUT is full */
32}
33
34/* returns the next available streamid for pcie, -errno if failed */
35static int ls_pcie_next_streamid(void)
36{
37 static int next_stream_id = FSL_PEX_STREAM_ID_START;
38
39 if (next_stream_id > FSL_PEX_STREAM_ID_END)
40 return -EINVAL;
41
42 return next_stream_id++;
43}
44
Minghuan Lian80afc632016-12-13 14:54:17 +080045static void lut_writel(struct ls_pcie *pcie, unsigned int value,
46 unsigned int offset)
47{
48 if (pcie->big_endian)
49 out_be32(pcie->lut + offset, value);
50 else
51 out_le32(pcie->lut + offset, value);
52}
53
54/*
55 * Program a single LUT entry
56 */
57static void ls_pcie_lut_set_mapping(struct ls_pcie *pcie, int index, u32 devid,
58 u32 streamid)
59{
60 /* leave mask as all zeroes, want to match all bits */
61 lut_writel(pcie, devid << 16, PCIE_LUT_UDR(index));
62 lut_writel(pcie, streamid | PCIE_LUT_ENABLE, PCIE_LUT_LDR(index));
63}
64
65/*
66 * An msi-map is a property to be added to the pci controller
67 * node. It is a table, where each entry consists of 4 fields
68 * e.g.:
69 *
70 * msi-map = <[devid] [phandle-to-msi-ctrl] [stream-id] [count]
71 * [devid] [phandle-to-msi-ctrl] [stream-id] [count]>;
72 */
73static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie,
74 u32 devid, u32 streamid)
75{
76 u32 *prop;
77 u32 phandle;
78 int nodeoffset;
Hou Zhiqiang0aaa1a92017-03-03 12:35:10 +080079 uint svr;
80 char *compat = NULL;
Minghuan Lian80afc632016-12-13 14:54:17 +080081
82 /* find pci controller node */
83 nodeoffset = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
84 pcie->dbi_res.start);
85 if (nodeoffset < 0) {
Hou Zhiqiang19538f32016-12-13 14:54:24 +080086#ifdef CONFIG_FSL_PCIE_COMPAT /* Compatible with older version of dts node */
Hou Zhiqiang0aaa1a92017-03-03 12:35:10 +080087 svr = (get_svr() >> SVR_VAR_PER_SHIFT) & 0xFFFFFE;
88 if (svr == SVR_LS2088A || svr == SVR_LS2084A ||
Priyanka Jaine809e742017-04-27 15:08:06 +053089 svr == SVR_LS2048A || svr == SVR_LS2044A ||
90 svr == SVR_LS2081A || svr == SVR_LS2041A)
Hou Zhiqiang0aaa1a92017-03-03 12:35:10 +080091 compat = "fsl,ls2088a-pcie";
92 else
93 compat = CONFIG_FSL_PCIE_COMPAT;
94 if (compat)
95 nodeoffset = fdt_node_offset_by_compat_reg(blob,
96 compat, pcie->dbi_res.start);
97#endif
Minghuan Lian80afc632016-12-13 14:54:17 +080098 if (nodeoffset < 0)
99 return;
Minghuan Lian80afc632016-12-13 14:54:17 +0800100 }
101
102 /* get phandle to MSI controller */
103 prop = (u32 *)fdt_getprop(blob, nodeoffset, "msi-parent", 0);
104 if (prop == NULL) {
105 debug("\n%s: ERROR: missing msi-parent: PCIe%d\n",
106 __func__, pcie->idx);
107 return;
108 }
109 phandle = fdt32_to_cpu(*prop);
110
111 /* set one msi-map row */
112 fdt_appendprop_u32(blob, nodeoffset, "msi-map", devid);
113 fdt_appendprop_u32(blob, nodeoffset, "msi-map", phandle);
114 fdt_appendprop_u32(blob, nodeoffset, "msi-map", streamid);
115 fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1);
116}
117
Bharat Bhushan78be6222017-03-22 12:12:33 +0530118/*
119 * An iommu-map is a property to be added to the pci controller
120 * node. It is a table, where each entry consists of 4 fields
121 * e.g.:
122 *
123 * iommu-map = <[devid] [phandle-to-iommu-ctrl] [stream-id] [count]
124 * [devid] [phandle-to-iommu-ctrl] [stream-id] [count]>;
125 */
126static void fdt_pcie_set_iommu_map_entry(void *blob, struct ls_pcie *pcie,
127 u32 devid, u32 streamid)
128{
129 u32 *prop;
130 u32 iommu_map[4];
131 int nodeoffset;
132 int lenp;
133
134 /* find pci controller node */
135 nodeoffset = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
136 pcie->dbi_res.start);
137 if (nodeoffset < 0) {
138#ifdef CONFIG_FSL_PCIE_COMPAT /* Compatible with older version of dts node */
139 nodeoffset = fdt_node_offset_by_compat_reg(blob,
140 CONFIG_FSL_PCIE_COMPAT, pcie->dbi_res.start);
141 if (nodeoffset < 0)
142 return;
143#else
144 return;
145#endif
146 }
147
148 /* get phandle to iommu controller */
149 prop = fdt_getprop_w(blob, nodeoffset, "iommu-map", &lenp);
150 if (prop == NULL) {
151 debug("\n%s: ERROR: missing iommu-map: PCIe%d\n",
152 __func__, pcie->idx);
153 return;
154 }
155
156 /* set iommu-map row */
157 iommu_map[0] = cpu_to_fdt32(devid);
158 iommu_map[1] = *++prop;
159 iommu_map[2] = cpu_to_fdt32(streamid);
160 iommu_map[3] = cpu_to_fdt32(1);
161
162 if (devid == 0) {
163 fdt_setprop_inplace(blob, nodeoffset, "iommu-map",
164 iommu_map, 16);
165 } else {
166 fdt_appendprop(blob, nodeoffset, "iommu-map", iommu_map, 16);
167 }
168}
169
Minghuan Lian80afc632016-12-13 14:54:17 +0800170static void fdt_fixup_pcie(void *blob)
171{
172 struct udevice *dev, *bus;
173 struct ls_pcie *pcie;
174 int streamid;
175 int index;
176 pci_dev_t bdf;
177
178 /* Scan all known buses */
179 for (pci_find_first_device(&dev);
180 dev;
181 pci_find_next_device(&dev)) {
182 for (bus = dev; device_is_on_pci_bus(bus);)
183 bus = bus->parent;
184 pcie = dev_get_priv(bus);
185
186 streamid = ls_pcie_next_streamid();
187 if (streamid < 0) {
188 debug("ERROR: no stream ids free\n");
189 continue;
190 }
191
192 index = ls_pcie_next_lut_index(pcie);
193 if (index < 0) {
194 debug("ERROR: no LUT indexes free\n");
195 continue;
196 }
197
198 /* the DT fixup must be relative to the hose first_busno */
199 bdf = dm_pci_get_bdf(dev) - PCI_BDF(bus->seq, 0, 0);
200 /* map PCI b.d.f to streamID in LUT */
201 ls_pcie_lut_set_mapping(pcie, index, bdf >> 8,
202 streamid);
203 /* update msi-map in device tree */
204 fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8,
205 streamid);
Bharat Bhushan78be6222017-03-22 12:12:33 +0530206 /* update iommu-map in device tree */
207 fdt_pcie_set_iommu_map_entry(blob, pcie, bdf >> 8,
208 streamid);
Minghuan Lian80afc632016-12-13 14:54:17 +0800209 }
210}
211#endif
212
213static void ft_pcie_ls_setup(void *blob, struct ls_pcie *pcie)
214{
215 int off;
Hou Zhiqiang0aaa1a92017-03-03 12:35:10 +0800216 uint svr;
217 char *compat = NULL;
Minghuan Lian80afc632016-12-13 14:54:17 +0800218
219 off = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
220 pcie->dbi_res.start);
221 if (off < 0) {
Hou Zhiqiang19538f32016-12-13 14:54:24 +0800222#ifdef CONFIG_FSL_PCIE_COMPAT /* Compatible with older version of dts node */
Hou Zhiqiang0aaa1a92017-03-03 12:35:10 +0800223 svr = (get_svr() >> SVR_VAR_PER_SHIFT) & 0xFFFFFE;
224 if (svr == SVR_LS2088A || svr == SVR_LS2084A ||
Priyanka Jaine809e742017-04-27 15:08:06 +0530225 svr == SVR_LS2048A || svr == SVR_LS2044A ||
226 svr == SVR_LS2081A || svr == SVR_LS2041A)
Hou Zhiqiang0aaa1a92017-03-03 12:35:10 +0800227 compat = "fsl,ls2088a-pcie";
228 else
229 compat = CONFIG_FSL_PCIE_COMPAT;
230 if (compat)
231 off = fdt_node_offset_by_compat_reg(blob,
232 compat, pcie->dbi_res.start);
233#endif
Minghuan Lian80afc632016-12-13 14:54:17 +0800234 if (off < 0)
235 return;
Minghuan Lian80afc632016-12-13 14:54:17 +0800236 }
237
238 if (pcie->enabled)
239 fdt_set_node_status(blob, off, FDT_STATUS_OKAY, 0);
240 else
241 fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
242}
243
244/* Fixup Kernel DT for PCIe */
245void ft_pci_setup(void *blob, bd_t *bd)
246{
247 struct ls_pcie *pcie;
248
249 list_for_each_entry(pcie, &ls_pcie_list, list)
250 ft_pcie_ls_setup(blob, pcie);
251
Bharat Bhushan47d17362017-03-22 12:06:30 +0530252#if defined(CONFIG_FSL_LSCH3) || defined(CONFIG_FSL_LSCH2)
Minghuan Lian80afc632016-12-13 14:54:17 +0800253 fdt_fixup_pcie(blob);
254#endif
255}
Minghuan Lian80afc632016-12-13 14:54:17 +0800256
Hou Zhiqianga7294ab2016-12-13 14:54:16 +0800257#else /* !CONFIG_OF_BOARD_SETUP */
258void ft_pci_setup(void *blob, bd_t *bd)
259{
260}
261#endif