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10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/of_pci.h>
13#include <linux/of_platform.h>
14#include <linux/of_address.h>
15#include <linux/pci.h>
16#include <linux/platform_device.h>
17#include <linux/resource.h>
18
19#include "pcie-designware.h"
20
21#define PCIE_DBI2_OFFSET 0x1000
22
23#define to_ls_pcie_ep(x) dev_get_drvdata((x)->dev)
24
25struct ls_pcie_ep_drvdata {
26 u32 func_offset;
27 const struct dw_pcie_ep_ops *ops;
28 const struct dw_pcie_ops *dw_pcie_ops;
29};
30
31struct ls_pcie_ep {
32 struct dw_pcie *pci;
33 struct pci_epc_features *ls_epc;
34 const struct ls_pcie_ep_drvdata *drvdata;
35};
36
37static int ls_pcie_establish_link(struct dw_pcie *pci)
38{
39 return 0;
40}
41
42static const struct dw_pcie_ops dw_ls_pcie_ep_ops = {
43 .start_link = ls_pcie_establish_link,
44};
45
46static const struct pci_epc_features*
47ls_pcie_ep_get_features(struct dw_pcie_ep *ep)
48{
49 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
50 struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
51
52 return pcie->ls_epc;
53}
54
55static void ls_pcie_ep_init(struct dw_pcie_ep *ep)
56{
57 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
58 struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
59 struct dw_pcie_ep_func *ep_func;
60 enum pci_barno bar;
61
62 ep_func = dw_pcie_ep_get_func_from_ep(ep, 0);
63 if (!ep_func)
64 return;
65
66 for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
67 dw_pcie_ep_reset_bar(pci, bar);
68
69 pcie->ls_epc->msi_capable = ep_func->msi_cap ? true : false;
70 pcie->ls_epc->msix_capable = ep_func->msix_cap ? true : false;
71}
72
73static int ls_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
74 enum pci_epc_irq_type type, u16 interrupt_num)
75{
76 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
77
78 switch (type) {
79 case PCI_EPC_IRQ_LEGACY:
80 return dw_pcie_ep_raise_legacy_irq(ep, func_no);
81 case PCI_EPC_IRQ_MSI:
82 return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
83 case PCI_EPC_IRQ_MSIX:
84 return dw_pcie_ep_raise_msix_irq_doorbell(ep, func_no,
85 interrupt_num);
86 default:
87 dev_err(pci->dev, "UNKNOWN IRQ type\n");
88 return -EINVAL;
89 }
90}
91
92static unsigned int ls_pcie_ep_func_conf_select(struct dw_pcie_ep *ep,
93 u8 func_no)
94{
95 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
96 struct ls_pcie_ep *pcie = to_ls_pcie_ep(pci);
97
98 WARN_ON(func_no && !pcie->drvdata->func_offset);
99 return pcie->drvdata->func_offset * func_no;
100}
101
102static const struct dw_pcie_ep_ops ls_pcie_ep_ops = {
103 .ep_init = ls_pcie_ep_init,
104 .raise_irq = ls_pcie_ep_raise_irq,
105 .get_features = ls_pcie_ep_get_features,
106 .func_conf_select = ls_pcie_ep_func_conf_select,
107};
108
109static const struct ls_pcie_ep_drvdata ls1_ep_drvdata = {
110 .ops = &ls_pcie_ep_ops,
111 .dw_pcie_ops = &dw_ls_pcie_ep_ops,
112};
113
114static const struct ls_pcie_ep_drvdata ls2_ep_drvdata = {
115 .func_offset = 0x20000,
116 .ops = &ls_pcie_ep_ops,
117 .dw_pcie_ops = &dw_ls_pcie_ep_ops,
118};
119
120static const struct of_device_id ls_pcie_ep_of_match[] = {
121 { .compatible = "fsl,ls1046a-pcie-ep", .data = &ls1_ep_drvdata },
122 { .compatible = "fsl,ls1088a-pcie-ep", .data = &ls2_ep_drvdata },
123 { .compatible = "fsl,ls2088a-pcie-ep", .data = &ls2_ep_drvdata },
124 { },
125};
126
127static int __init ls_add_pcie_ep(struct ls_pcie_ep *pcie,
128 struct platform_device *pdev)
129{
130 struct dw_pcie *pci = pcie->pci;
131 struct device *dev = pci->dev;
132 struct dw_pcie_ep *ep;
133 struct resource *res;
134 int ret;
135
136 ep = &pci->ep;
137 ep->ops = pcie->drvdata->ops;
138
139 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
140 if (!res)
141 return -EINVAL;
142
143 ep->phys_base = res->start;
144 ep->addr_size = resource_size(res);
145
146 ret = dw_pcie_ep_init(ep);
147 if (ret) {
148 dev_err(dev, "failed to initialize endpoint\n");
149 return ret;
150 }
151
152 return 0;
153}
154
155static int __init ls_pcie_ep_probe(struct platform_device *pdev)
156{
157 struct device *dev = &pdev->dev;
158 struct dw_pcie *pci;
159 struct ls_pcie_ep *pcie;
160 struct pci_epc_features *ls_epc;
161 struct resource *dbi_base;
162 int ret;
163
164 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
165 if (!pcie)
166 return -ENOMEM;
167
168 pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
169 if (!pci)
170 return -ENOMEM;
171
172 ls_epc = devm_kzalloc(dev, sizeof(*ls_epc), GFP_KERNEL);
173 if (!ls_epc)
174 return -ENOMEM;
175
176 pcie->drvdata = of_device_get_match_data(dev);
177
178 pci->dev = dev;
179 pci->ops = pcie->drvdata->dw_pcie_ops;
180
181 ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4),
182
183 pcie->pci = pci;
184 pcie->ls_epc = ls_epc;
185
186 dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
187 pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);
188 if (IS_ERR(pci->dbi_base))
189 return PTR_ERR(pci->dbi_base);
190
191 pci->dbi_base2 = pci->dbi_base + PCIE_DBI2_OFFSET;
192
193 platform_set_drvdata(pdev, pcie);
194
195 ret = ls_add_pcie_ep(pcie, pdev);
196
197 return ret;
198}
199
200static struct platform_driver ls_pcie_ep_driver = {
201 .driver = {
202 .name = "layerscape-pcie-ep",
203 .of_match_table = ls_pcie_ep_of_match,
204 .suppress_bind_attrs = true,
205 },
206};
207builtin_platform_driver_probe(ls_pcie_ep_driver, ls_pcie_ep_probe);
208
