3 * Copyright 2014-2015 Freescale Semiconductor, Inc.
4 * Layerscape PCIe driver
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/fsl_serdes.h>
16 #if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \
18 #include <asm/arch/clock.h>
20 #include "pcie_layerscape.h"
22 DECLARE_GLOBAL_DATA_PTR;
24 LIST_HEAD(ls_pcie_list);
26 static unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset)
28 return in_le32(pcie->dbi + offset);
31 static void dbi_writel(struct ls_pcie *pcie, unsigned int value,
34 out_le32(pcie->dbi + offset, value);
37 static unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset)
40 return in_be32(pcie->ctrl + offset);
42 return in_le32(pcie->ctrl + offset);
45 static void ctrl_writel(struct ls_pcie *pcie, unsigned int value,
49 out_be32(pcie->ctrl + offset, value);
51 out_le32(pcie->ctrl + offset, value);
54 static int ls_pcie_ltssm(struct ls_pcie *pcie)
60 if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) {
61 state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx));
62 state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK;
64 state = ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK;
70 static int ls_pcie_link_up(struct ls_pcie *pcie)
74 ltssm = ls_pcie_ltssm(pcie);
75 if (ltssm < LTSSM_PCIE_L0)
81 static void ls_pcie_cfg0_set_busdev(struct ls_pcie *pcie, u32 busdev)
83 dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
85 dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET);
88 static void ls_pcie_cfg1_set_busdev(struct ls_pcie *pcie, u32 busdev)
90 dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
92 dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET);
95 static void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type,
96 u64 phys, u64 bus_addr, pci_size_t size)
98 dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT);
99 dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE);
100 dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE);
101 dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT);
102 dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET);
103 dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET);
104 dbi_writel(pcie, type, PCIE_ATU_CR1);
105 dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
108 /* Use bar match mode and MEM type as default */
109 static void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, int idx,
112 dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT);
113 dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET);
114 dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET);
115 dbi_writel(pcie, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1);
116 dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE |
117 PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2);
120 static void ls_pcie_dump_atu(struct ls_pcie *pcie)
124 for (i = 0; i < PCIE_ATU_REGION_NUM; i++) {
125 dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | i,
127 debug("iATU%d:\n", i);
128 debug("\tLOWER PHYS 0x%08x\n",
129 dbi_readl(pcie, PCIE_ATU_LOWER_BASE));
130 debug("\tUPPER PHYS 0x%08x\n",
131 dbi_readl(pcie, PCIE_ATU_UPPER_BASE));
132 debug("\tLOWER BUS 0x%08x\n",
133 dbi_readl(pcie, PCIE_ATU_LOWER_TARGET));
134 debug("\tUPPER BUS 0x%08x\n",
135 dbi_readl(pcie, PCIE_ATU_UPPER_TARGET));
136 debug("\tLIMIT 0x%08x\n",
137 readl(pcie->dbi + PCIE_ATU_LIMIT));
138 debug("\tCR1 0x%08x\n",
139 dbi_readl(pcie, PCIE_ATU_CR1));
140 debug("\tCR2 0x%08x\n",
141 dbi_readl(pcie, PCIE_ATU_CR2));
145 static void ls_pcie_setup_atu(struct ls_pcie *pcie)
147 struct pci_region *io, *mem, *pref;
148 unsigned long long offset = 0;
153 if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) {
154 offset = LS1021_PCIE_SPACE_OFFSET +
155 LS1021_PCIE_SPACE_SIZE * pcie->idx;
158 /* ATU 0 : OUTBOUND : CFG0 */
159 ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0,
161 pcie->cfg_res.start + offset,
163 fdt_resource_size(&pcie->cfg_res) / 2);
164 /* ATU 1 : OUTBOUND : CFG1 */
165 ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1,
167 pcie->cfg_res.start + offset +
168 fdt_resource_size(&pcie->cfg_res) / 2,
170 fdt_resource_size(&pcie->cfg_res) / 2);
172 pci_get_regions(pcie->bus, &io, &mem, &pref);
173 idx = PCIE_ATU_REGION_INDEX1 + 1;
175 /* Fix the pcie memory map for LS2088A series SoCs */
176 svr = (svr >> SVR_VAR_PER_SHIFT) & 0xFFFFFE;
177 if (svr == SVR_LS2088A || svr == SVR_LS2084A ||
178 svr == SVR_LS2048A || svr == SVR_LS2044A ||
179 svr == SVR_LS2081A || svr == SVR_LS2041A) {
181 io->phys_start = (io->phys_start &
182 (PCIE_PHYS_SIZE - 1)) +
183 LS2088A_PCIE1_PHYS_ADDR +
184 LS2088A_PCIE_PHYS_SIZE * pcie->idx;
186 mem->phys_start = (mem->phys_start &
187 (PCIE_PHYS_SIZE - 1)) +
188 LS2088A_PCIE1_PHYS_ADDR +
189 LS2088A_PCIE_PHYS_SIZE * pcie->idx;
191 pref->phys_start = (pref->phys_start &
192 (PCIE_PHYS_SIZE - 1)) +
193 LS2088A_PCIE1_PHYS_ADDR +
194 LS2088A_PCIE_PHYS_SIZE * pcie->idx;
198 /* ATU : OUTBOUND : IO */
199 ls_pcie_atu_outbound_set(pcie, idx++,
201 io->phys_start + offset,
206 /* ATU : OUTBOUND : MEM */
207 ls_pcie_atu_outbound_set(pcie, idx++,
209 mem->phys_start + offset,
214 /* ATU : OUTBOUND : pref */
215 ls_pcie_atu_outbound_set(pcie, idx++,
217 pref->phys_start + offset,
221 ls_pcie_dump_atu(pcie);
224 /* Return 0 if the address is valid, -errno if not valid */
225 static int ls_pcie_addr_valid(struct ls_pcie *pcie, pci_dev_t bdf)
227 struct udevice *bus = pcie->bus;
232 if (PCI_BUS(bdf) < bus->seq)
235 if ((PCI_BUS(bdf) > bus->seq) && (!ls_pcie_link_up(pcie)))
238 if (PCI_BUS(bdf) <= (bus->seq + 1) && (PCI_DEV(bdf) > 0))
244 void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf,
247 struct udevice *bus = pcie->bus;
250 if (PCI_BUS(bdf) == bus->seq)
251 return pcie->dbi + offset;
253 busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) |
254 PCIE_ATU_DEV(PCI_DEV(bdf)) |
255 PCIE_ATU_FUNC(PCI_FUNC(bdf));
257 if (PCI_BUS(bdf) == bus->seq + 1) {
258 ls_pcie_cfg0_set_busdev(pcie, busdev);
259 return pcie->cfg0 + offset;
261 ls_pcie_cfg1_set_busdev(pcie, busdev);
262 return pcie->cfg1 + offset;
266 static int ls_pcie_read_config(struct udevice *bus, pci_dev_t bdf,
267 uint offset, ulong *valuep,
268 enum pci_size_t size)
270 struct ls_pcie *pcie = dev_get_priv(bus);
273 if (ls_pcie_addr_valid(pcie, bdf)) {
274 *valuep = pci_get_ff(size);
278 address = ls_pcie_conf_address(pcie, bdf, offset);
282 *valuep = readb(address);
285 *valuep = readw(address);
288 *valuep = readl(address);
295 static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
296 uint offset, ulong value,
297 enum pci_size_t size)
299 struct ls_pcie *pcie = dev_get_priv(bus);
302 if (ls_pcie_addr_valid(pcie, bdf))
305 address = ls_pcie_conf_address(pcie, bdf, offset);
309 writeb(value, address);
312 writew(value, address);
315 writel(value, address);
322 /* Clear multi-function bit */
323 static void ls_pcie_clear_multifunction(struct ls_pcie *pcie)
325 writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE);
328 /* Fix class value */
329 static void ls_pcie_fix_class(struct ls_pcie *pcie)
331 writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE);
334 /* Drop MSG TLP except for Vendor MSG */
335 static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
339 val = dbi_readl(pcie, PCIE_STRFMR1);
341 dbi_writel(pcie, val, PCIE_STRFMR1);
344 /* Disable all bars in RC mode */
345 static void ls_pcie_disable_bars(struct ls_pcie *pcie)
349 sriov = in_le32(pcie->dbi + PCIE_SRIOV);
352 * TODO: For PCIe controller with SRIOV, the method to disable bars
353 * is different and more complex, so will add later.
355 if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV)
358 dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0);
359 dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1);
360 dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1);
363 static void ls_pcie_setup_ctrl(struct ls_pcie *pcie)
365 ls_pcie_setup_atu(pcie);
367 dbi_writel(pcie, 1, PCIE_DBI_RO_WR_EN);
368 ls_pcie_fix_class(pcie);
369 ls_pcie_clear_multifunction(pcie);
370 ls_pcie_drop_msg_tlp(pcie);
371 dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN);
373 ls_pcie_disable_bars(pcie);
376 static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie)
378 u64 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE;
380 /* ATU 0 : INBOUND : map BAR0 */
381 ls_pcie_atu_inbound_set(pcie, 0, 0, phys);
382 /* ATU 1 : INBOUND : map BAR1 */
383 phys += PCIE_BAR1_SIZE;
384 ls_pcie_atu_inbound_set(pcie, 1, 1, phys);
385 /* ATU 2 : INBOUND : map BAR2 */
386 phys += PCIE_BAR2_SIZE;
387 ls_pcie_atu_inbound_set(pcie, 2, 2, phys);
388 /* ATU 3 : INBOUND : map BAR4 */
389 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + PCIE_BAR4_SIZE;
390 ls_pcie_atu_inbound_set(pcie, 3, 4, phys);
392 /* ATU 0 : OUTBOUND : map MEM */
393 ls_pcie_atu_outbound_set(pcie, 0,
397 CONFIG_SYS_PCI_MEMORY_SIZE);
400 /* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */
401 static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
403 /* The least inbound window is 4KiB */
409 writel(size - 1, bar_base + PCI_BASE_ADDRESS_0);
412 writel(size - 1, bar_base + PCI_BASE_ADDRESS_1);
415 writel(size - 1, bar_base + PCI_BASE_ADDRESS_2);
416 writel(0, bar_base + PCI_BASE_ADDRESS_3);
419 writel(size - 1, bar_base + PCI_BASE_ADDRESS_4);
420 writel(0, bar_base + PCI_BASE_ADDRESS_5);
427 static void ls_pcie_ep_setup_bars(void *bar_base)
429 /* BAR0 - 32bit - 4K configuration */
430 ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
431 /* BAR1 - 32bit - 8K MSIX*/
432 ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
433 /* BAR2 - 64bit - 4K MEM desciptor */
434 ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
435 /* BAR4 - 64bit - 1M MEM*/
436 ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
439 static void ls_pcie_ep_enable_cfg(struct ls_pcie *pcie)
441 ctrl_writel(pcie, PCIE_CONFIG_READY, PCIE_PF_CONFIG);
444 static void ls_pcie_setup_ep(struct ls_pcie *pcie)
448 sriov = readl(pcie->dbi + PCIE_SRIOV);
449 if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
452 for (pf = 0; pf < PCIE_PF_NUM; pf++) {
453 for (vf = 0; vf <= PCIE_VF_NUM; vf++) {
454 ctrl_writel(pcie, PCIE_LCTRL0_VAL(pf, vf),
457 ls_pcie_ep_setup_bars(pcie->dbi);
458 ls_pcie_ep_setup_atu(pcie);
462 ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL);
464 ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE);
465 ls_pcie_ep_setup_atu(pcie);
468 ls_pcie_ep_enable_cfg(pcie);
471 static int ls_pcie_probe(struct udevice *dev)
473 struct ls_pcie *pcie = dev_get_priv(dev);
474 const void *fdt = gd->fdt_blob;
475 int node = dev_of_offset(dev);
484 ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
485 "dbi", &pcie->dbi_res);
487 printf("ls-pcie: resource \"dbi\" not found\n");
491 pcie->idx = (pcie->dbi_res.start - PCIE_SYS_BASE_ADDR) / PCIE_CCSR_SIZE;
493 list_add(&pcie->list, &ls_pcie_list);
495 pcie->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx));
496 if (!pcie->enabled) {
497 printf("PCIe%d: %s disabled\n", pcie->idx, dev->name);
501 pcie->dbi = map_physmem(pcie->dbi_res.start,
502 fdt_resource_size(&pcie->dbi_res),
505 ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
506 "lut", &pcie->lut_res);
508 pcie->lut = map_physmem(pcie->lut_res.start,
509 fdt_resource_size(&pcie->lut_res),
512 ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
513 "ctrl", &pcie->ctrl_res);
515 pcie->ctrl = map_physmem(pcie->ctrl_res.start,
516 fdt_resource_size(&pcie->ctrl_res),
519 pcie->ctrl = pcie->lut;
522 printf("%s: NOT find CTRL\n", dev->name);
526 ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
527 "config", &pcie->cfg_res);
529 printf("%s: resource \"config\" not found\n", dev->name);
534 * Fix the pcie memory map address and PF control registers address
535 * for LS2088A series SoCs
538 svr = (svr >> SVR_VAR_PER_SHIFT) & 0xFFFFFE;
539 if (svr == SVR_LS2088A || svr == SVR_LS2084A ||
540 svr == SVR_LS2048A || svr == SVR_LS2044A ||
541 svr == SVR_LS2081A || svr == SVR_LS2041A) {
542 pcie->cfg_res.start = LS2088A_PCIE1_PHYS_ADDR +
543 LS2088A_PCIE_PHYS_SIZE * pcie->idx;
544 pcie->ctrl = pcie->lut + 0x40000;
547 pcie->cfg0 = map_physmem(pcie->cfg_res.start,
548 fdt_resource_size(&pcie->cfg_res),
550 pcie->cfg1 = pcie->cfg0 + fdt_resource_size(&pcie->cfg_res) / 2;
552 pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian");
554 debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n",
555 dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut,
556 (unsigned long)pcie->ctrl, (unsigned long)pcie->cfg0,
559 header_type = readb(pcie->dbi + PCI_HEADER_TYPE);
560 ep_mode = (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL;
561 printf("PCIe%u: %s %s", pcie->idx, dev->name,
562 ep_mode ? "Endpoint" : "Root Complex");
565 ls_pcie_setup_ep(pcie);
567 ls_pcie_setup_ctrl(pcie);
569 if (!ls_pcie_link_up(pcie)) {
570 /* Let the user know there's no PCIe link */
571 printf(": no link\n");
575 /* Print the negotiated PCIe link width */
576 link_sta = readw(pcie->dbi + PCIE_LINK_STA);
577 printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4,
578 link_sta & PCIE_LINK_SPEED_MASK);
583 static const struct dm_pci_ops ls_pcie_ops = {
584 .read_config = ls_pcie_read_config,
585 .write_config = ls_pcie_write_config,
588 static const struct udevice_id ls_pcie_ids[] = {
589 { .compatible = "fsl,ls-pcie" },
593 U_BOOT_DRIVER(pci_layerscape) = {
594 .name = "pci_layerscape",
596 .of_match = ls_pcie_ids,
598 .probe = ls_pcie_probe,
599 .priv_auto_alloc_size = sizeof(struct ls_pcie),