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Xiaowei Bao13b277f2020-07-09 23:31:33 +08001// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2020 NXP
4 * Layerscape PCIe EP driver
5 */
6
7#include <common.h>
8#include <dm.h>
9#include <dm/devres.h>
10#include <errno.h>
11#include <pci_ep.h>
12#include <asm/io.h>
13#include <linux/sizes.h>
14#include <linux/log2.h>
15#include "pcie_layerscape.h"
16
17DECLARE_GLOBAL_DATA_PTR;
18
19static void ls_pcie_ep_enable_cfg(struct ls_pcie_ep *pcie_ep)
20{
21 struct ls_pcie *pcie = pcie_ep->pcie;
22 u32 config;
23
24 config = ctrl_readl(pcie, PCIE_PF_CONFIG);
25 config |= PCIE_CONFIG_READY;
26 ctrl_writel(pcie, config, PCIE_PF_CONFIG);
27}
28
29static int ls_ep_set_bar(struct udevice *dev, uint fn, struct pci_bar *ep_bar)
30{
31 struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
32 struct ls_pcie *pcie = pcie_ep->pcie;
33 dma_addr_t bar_phys = ep_bar->phys_addr;
34 enum pci_barno bar = ep_bar->barno;
35 u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
36 int flags = ep_bar->flags;
37 int type, idx;
38 u64 size;
39
40 idx = bar;
41 /* BAR size is 2^(aperture + 11) */
42 size = max_t(size_t, ep_bar->size, FSL_PCIE_EP_MIN_APERTURE);
43
44 if (!(flags & PCI_BASE_ADDRESS_SPACE))
45 type = PCIE_ATU_TYPE_MEM;
46 else
47 type = PCIE_ATU_TYPE_IO;
48
Xiaowei Baoecb85db2020-07-09 23:31:39 +080049 ls_pcie_atu_inbound_set(pcie, fn, 0, type, idx, bar, bar_phys);
Xiaowei Bao13b277f2020-07-09 23:31:33 +080050
51 dbi_writel(pcie, lower_32_bits(size - 1), reg + PCIE_NO_SRIOV_BAR_BASE);
52 dbi_writel(pcie, flags, reg);
53
54 if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
55 dbi_writel(pcie, upper_32_bits(size - 1),
56 reg + 4 + PCIE_NO_SRIOV_BAR_BASE);
57 dbi_writel(pcie, 0, reg + 4);
58 }
59
60 return 0;
61}
62
63static struct pci_ep_ops ls_pcie_ep_ops = {
64 .set_bar = ls_ep_set_bar,
65};
66
Xiaowei Baob4d63b02020-07-09 23:31:36 +080067static void ls_pcie_ep_setup_atu(struct ls_pcie_ep *pcie_ep, u32 pf)
Xiaowei Bao13b277f2020-07-09 23:31:33 +080068{
69 struct ls_pcie *pcie = pcie_ep->pcie;
Xiaowei Baoecb85db2020-07-09 23:31:39 +080070 u32 vf_flag = 0;
Xiaowei Baob4d63b02020-07-09 23:31:36 +080071 u64 phys = 0;
Xiaowei Bao13b277f2020-07-09 23:31:33 +080072
Xiaowei Baob4d63b02020-07-09 23:31:36 +080073 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + pf * SZ_64M;
74
75 phys = ALIGN(phys, PCIE_BAR0_SIZE);
Xiaowei Bao13b277f2020-07-09 23:31:33 +080076 /* ATU 0 : INBOUND : map BAR0 */
Xiaowei Baoecb85db2020-07-09 23:31:39 +080077 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
Xiaowei Baob4d63b02020-07-09 23:31:36 +080078 0 + pf * BAR_NUM, 0, phys);
Xiaowei Bao13b277f2020-07-09 23:31:33 +080079 /* ATU 1 : INBOUND : map BAR1 */
Xiaowei Baob4d63b02020-07-09 23:31:36 +080080 phys = ALIGN(phys + PCIE_BAR0_SIZE, PCIE_BAR1_SIZE);
Xiaowei Baoecb85db2020-07-09 23:31:39 +080081 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
Xiaowei Baob4d63b02020-07-09 23:31:36 +080082 1 + pf * BAR_NUM, 1, phys);
Xiaowei Bao13b277f2020-07-09 23:31:33 +080083 /* ATU 2 : INBOUND : map BAR2 */
Xiaowei Baob4d63b02020-07-09 23:31:36 +080084 phys = ALIGN(phys + PCIE_BAR1_SIZE, PCIE_BAR2_SIZE);
Xiaowei Baoecb85db2020-07-09 23:31:39 +080085 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
Xiaowei Baob4d63b02020-07-09 23:31:36 +080086 2 + pf * BAR_NUM, 2, phys);
87 /* ATU 3 : INBOUND : map BAR2 */
88 phys = ALIGN(phys + PCIE_BAR2_SIZE, PCIE_BAR4_SIZE);
Xiaowei Baoecb85db2020-07-09 23:31:39 +080089 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
Xiaowei Baob4d63b02020-07-09 23:31:36 +080090 3 + pf * BAR_NUM, 4, phys);
Xiaowei Bao13b277f2020-07-09 23:31:33 +080091
Xiaowei Baoecb85db2020-07-09 23:31:39 +080092 if (pcie_ep->sriov_flag) {
93 vf_flag = 1;
94 /* ATU 4 : INBOUND : map BAR0 */
95 phys = ALIGN(phys + PCIE_BAR4_SIZE, PCIE_BAR0_SIZE);
96 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
97 4 + pf * BAR_NUM, 0, phys);
98 /* ATU 5 : INBOUND : map BAR1 */
99 phys = ALIGN(phys + PCIE_BAR0_SIZE * PCIE_VF_NUM,
100 PCIE_BAR1_SIZE);
101 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
102 5 + pf * BAR_NUM, 1, phys);
103 /* ATU 6 : INBOUND : map BAR2 */
104 phys = ALIGN(phys + PCIE_BAR1_SIZE * PCIE_VF_NUM,
105 PCIE_BAR2_SIZE);
106 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
107 6 + pf * BAR_NUM, 2, phys);
108 /* ATU 7 : INBOUND : map BAR4 */
109 phys = ALIGN(phys + PCIE_BAR2_SIZE * PCIE_VF_NUM,
110 PCIE_BAR4_SIZE);
111 ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
112 7 + pf * BAR_NUM, 4, phys);
113 }
114
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800115 /* ATU: OUTBOUND : map MEM */
116 ls_pcie_atu_outbound_set(pcie, pf, PCIE_ATU_TYPE_MEM,
117 (u64)pcie_ep->addr_res.start +
118 pf * CONFIG_SYS_PCI_MEMORY_SIZE,
119 0, CONFIG_SYS_PCI_MEMORY_SIZE);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800120}
121
122/* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */
123static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
124{
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800125 u32 mask;
126
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800127 /* The least inbound window is 4KiB */
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800128 if (size < SZ_4K)
129 mask = 0;
130 else
131 mask = size - 1;
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800132
133 switch (bar) {
134 case 0:
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800135 writel(mask, bar_base + PCI_BASE_ADDRESS_0);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800136 break;
137 case 1:
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800138 writel(mask, bar_base + PCI_BASE_ADDRESS_1);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800139 break;
140 case 2:
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800141 writel(mask, bar_base + PCI_BASE_ADDRESS_2);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800142 writel(0, bar_base + PCI_BASE_ADDRESS_3);
143 break;
144 case 4:
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800145 writel(mask, bar_base + PCI_BASE_ADDRESS_4);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800146 writel(0, bar_base + PCI_BASE_ADDRESS_5);
147 break;
148 default:
149 break;
150 }
151}
152
153static void ls_pcie_ep_setup_bars(void *bar_base)
154{
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800155 /* BAR0 - 32bit - MEM */
156 ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
157 /* BAR1 - 32bit - MEM*/
158 ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
159 /* BAR2 - 64bit - MEM */
160 ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
161 /* BAR4 - 64bit - MEM */
162 ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
163}
164
165static void ls_pcie_ep_setup_vf_bars(void *bar_base)
166{
167 /* VF BAR0 MASK register at offset 0x19c*/
168 bar_base += PCIE_SRIOV_VFBAR0 - PCI_BASE_ADDRESS_0;
169
170 /* VF-BAR0 - 32bit - MEM */
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800171 ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800172 /* VF-BAR1 - 32bit - MEM*/
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800173 ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800174 /* VF-BAR2 - 64bit - MEM */
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800175 ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800176 /* VF-BAR4 - 64bit - MEM */
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800177 ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
178}
179
180static void ls_pcie_setup_ep(struct ls_pcie_ep *pcie_ep)
181{
182 u32 sriov;
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800183 u32 pf, vf;
184 void *bar_base = NULL;
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800185 struct ls_pcie *pcie = pcie_ep->pcie;
186
187 sriov = readl(pcie->dbi + PCIE_SRIOV);
188 if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800189 pcie_ep->sriov_flag = 1;
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800190 for (pf = 0; pf < PCIE_PF_NUM; pf++) {
Xiaowei Bao06a329a2020-07-09 23:31:37 +0800191 /*
192 * The VF_BARn_REG register's Prefetchable and Type bit
193 * fields are overwritten by a write to VF's BAR Mask
194 * register. Before writing to the VF_BARn_MASK_REG
195 * register, write 0b to the PCIE_MISC_CONTROL_1_OFF
196 * register.
197 */
198 writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF);
199
Xiaowei Baocdecb972020-07-09 23:31:38 +0800200 bar_base = pcie->dbi +
Xiaowei Bao4a602b52020-07-09 23:31:41 +0800201 PCIE_MASK_OFFSET(pcie_ep->cfg2_flag, pf,
202 pcie_ep->pf1_offset);
Xiaowei Baocdecb972020-07-09 23:31:38 +0800203
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800204 if (pcie_ep->cfg2_flag) {
Xiaowei Baocdecb972020-07-09 23:31:38 +0800205 ctrl_writel(pcie,
206 PCIE_LCTRL0_VAL(pf, 0),
207 PCIE_PF_VF_CTRL);
208 ls_pcie_ep_setup_bars(bar_base);
209
210 for (vf = 1; vf <= PCIE_VF_NUM; vf++) {
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800211 ctrl_writel(pcie,
212 PCIE_LCTRL0_VAL(pf, vf),
213 PCIE_PF_VF_CTRL);
Xiaowei Baocdecb972020-07-09 23:31:38 +0800214 ls_pcie_ep_setup_vf_bars(bar_base);
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800215 }
Xiaowei Baocdecb972020-07-09 23:31:38 +0800216 } else {
217 ls_pcie_ep_setup_bars(bar_base);
218 ls_pcie_ep_setup_vf_bars(bar_base);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800219 }
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800220
221 ls_pcie_ep_setup_atu(pcie_ep, pf);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800222 }
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800223
224 if (pcie_ep->cfg2_flag) /* Disable CFG2 */
225 ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800226 } else {
227 ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE);
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800228 ls_pcie_ep_setup_atu(pcie_ep, 0);
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800229 }
230
Xiaowei Baobb3f7132020-07-09 23:31:40 +0800231 ls_pcie_dump_atu(pcie, PCIE_ATU_REGION_NUM_SRIOV,
232 PCIE_ATU_REGION_INBOUND);
233
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800234 ls_pcie_ep_enable_cfg(pcie_ep);
235}
236
237static int ls_pcie_ep_probe(struct udevice *dev)
238{
239 struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
240 struct ls_pcie *pcie;
241 u16 link_sta;
242 int ret;
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800243 u32 svr;
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800244
245 pcie = devm_kmalloc(dev, sizeof(*pcie), GFP_KERNEL);
246 if (!pcie)
247 return -ENOMEM;
248
249 pcie_ep->pcie = pcie;
250
251 pcie->dbi = (void __iomem *)devfdt_get_addr_index(dev, 0);
252 if (!pcie->dbi)
253 return -ENOMEM;
254
255 pcie->ctrl = (void __iomem *)devfdt_get_addr_index(dev, 1);
256 if (!pcie->ctrl)
257 return -ENOMEM;
258
259 ret = fdt_get_named_resource(gd->fdt_blob, dev_of_offset(dev),
260 "reg", "reg-names",
261 "addr_space", &pcie_ep->addr_res);
262 if (ret) {
263 printf("%s: resource \"addr_space\" not found\n", dev->name);
264 return ret;
265 }
266
267 pcie->idx = ((unsigned long)pcie->dbi - PCIE_SYS_BASE_ADDR) /
268 PCIE_CCSR_SIZE;
269
270 pcie->big_endian = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
271 "big-endian");
272
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800273 svr = SVR_SOC_VER(get_svr());
274
Xiaowei Bao4a602b52020-07-09 23:31:41 +0800275 if (svr == SVR_LX2160A)
276 pcie_ep->pf1_offset = LX2160_PCIE_PF1_OFFSET;
277 else
278 pcie_ep->pf1_offset = LS_PCIE_PF1_OFFSET;
279
Xiaowei Baob4d63b02020-07-09 23:31:36 +0800280 if (svr == SVR_LS2080A || svr == SVR_LS2085A)
281 pcie_ep->cfg2_flag = 1;
282 else
283 pcie_ep->cfg2_flag = 0;
284
Xiaowei Bao13b277f2020-07-09 23:31:33 +0800285 pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f;
286 if (pcie->mode != PCI_HEADER_TYPE_NORMAL)
287 return 0;
288
289 pcie_ep->max_functions = fdtdec_get_int(gd->fdt_blob,
290 dev_of_offset(dev),
291 "max-functions", 1);
292 pcie_ep->num_ib_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
293 "num-ib-windows", 8);
294 pcie_ep->num_ob_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
295 "num-ob-windows", 8);
296
297 printf("PCIe%u: %s %s", pcie->idx, dev->name, "Endpoint");
298 ls_pcie_setup_ep(pcie_ep);
299
300 if (!ls_pcie_link_up(pcie)) {
301 /* Let the user know there's no PCIe link */
302 printf(": no link\n");
303 return 0;
304 }
305
306 /* Print the negotiated PCIe link width */
307 link_sta = readw(pcie->dbi + PCIE_LINK_STA);
308 printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4,
309 link_sta & PCIE_LINK_SPEED_MASK);
310
311 return 0;
312}
313
314static int ls_pcie_ep_remove(struct udevice *dev)
315{
316 return 0;
317}
318
319const struct udevice_id ls_pcie_ep_ids[] = {
320 { .compatible = "fsl,ls-pcie-ep" },
321 { }
322};
323
324U_BOOT_DRIVER(pci_layerscape_ep) = {
325 .name = "pci_layerscape_ep",
326 .id = UCLASS_PCI_EP,
327 .of_match = ls_pcie_ep_ids,
328 .ops = &ls_pcie_ep_ops,
329 .probe = ls_pcie_ep_probe,
330 .remove = ls_pcie_ep_remove,
331 .priv_auto_alloc_size = sizeof(struct ls_pcie_ep),
332};