2 * Synopsys Designware PCIe host controller driver
4 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/irq.h>
15 #include <linux/irqdomain.h>
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/msi.h>
19 #include <linux/of_address.h>
20 #include <linux/of_pci.h>
21 #include <linux/pci.h>
22 #include <linux/pci_regs.h>
23 #include <linux/platform_device.h>
24 #include <linux/types.h>
25 #include <linux/delay.h>
27 #include "pcie-designware.h"
29 /* Synopsis specific PCIE configuration registers */
30 #define PCIE_PORT_LINK_CONTROL 0x710
31 #define PORT_LINK_MODE_MASK (0x3f << 16)
32 #define PORT_LINK_MODE_1_LANES (0x1 << 16)
33 #define PORT_LINK_MODE_2_LANES (0x3 << 16)
34 #define PORT_LINK_MODE_4_LANES (0x7 << 16)
35 #define PORT_LINK_MODE_8_LANES (0xf << 16)
37 #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
38 #define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
39 #define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8)
40 #define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
41 #define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
42 #define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
43 #define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
45 #define PCIE_MSI_ADDR_LO 0x820
46 #define PCIE_MSI_ADDR_HI 0x824
47 #define PCIE_MSI_INTR0_ENABLE 0x828
48 #define PCIE_MSI_INTR0_MASK 0x82C
49 #define PCIE_MSI_INTR0_STATUS 0x830
51 #define PCIE_ATU_VIEWPORT 0x900
52 #define PCIE_ATU_REGION_INBOUND (0x1 << 31)
53 #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
54 #define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
55 #define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
56 #define PCIE_ATU_CR1 0x904
57 #define PCIE_ATU_TYPE_MEM (0x0 << 0)
58 #define PCIE_ATU_TYPE_IO (0x2 << 0)
59 #define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
60 #define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
61 #define PCIE_ATU_CR2 0x908
62 #define PCIE_ATU_ENABLE (0x1 << 31)
63 #define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
64 #define PCIE_ATU_LOWER_BASE 0x90C
65 #define PCIE_ATU_UPPER_BASE 0x910
66 #define PCIE_ATU_LIMIT 0x914
67 #define PCIE_ATU_LOWER_TARGET 0x918
68 #define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
69 #define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
70 #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
71 #define PCIE_ATU_UPPER_TARGET 0x91C
73 /* PCIe Port Logic registers */
74 #define PLR_OFFSET 0x700
75 #define PCIE_PHY_DEBUG_R1 (PLR_OFFSET + 0x2c)
76 #define PCIE_PHY_DEBUG_R1_LINK_UP 0x00000010
78 static struct pci_ops dw_pcie_ops;
80 int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val)
82 if ((uintptr_t)addr & (size - 1)) {
84 return PCIBIOS_BAD_REGISTER_NUMBER;
95 return PCIBIOS_BAD_REGISTER_NUMBER;
98 return PCIBIOS_SUCCESSFUL;
101 int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val)
103 if ((uintptr_t)addr & (size - 1))
104 return PCIBIOS_BAD_REGISTER_NUMBER;
113 return PCIBIOS_BAD_REGISTER_NUMBER;
115 return PCIBIOS_SUCCESSFUL;
118 static inline void dw_pcie_readl_rc(struct pcie_port *pp, u32 reg, u32 *val)
120 if (pp->ops->readl_rc)
121 pp->ops->readl_rc(pp, pp->dbi_base + reg, val);
123 *val = readl(pp->dbi_base + reg);
126 static inline void dw_pcie_writel_rc(struct pcie_port *pp, u32 val, u32 reg)
128 if (pp->ops->writel_rc)
129 pp->ops->writel_rc(pp, val, pp->dbi_base + reg);
131 writel(val, pp->dbi_base + reg);
134 static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
137 if (pp->ops->rd_own_conf)
138 return pp->ops->rd_own_conf(pp, where, size, val);
140 return dw_pcie_cfg_read(pp->dbi_base + where, size, val);
143 static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
146 if (pp->ops->wr_own_conf)
147 return pp->ops->wr_own_conf(pp, where, size, val);
149 return dw_pcie_cfg_write(pp->dbi_base + where, size, val);
152 static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
153 int type, u64 cpu_addr, u64 pci_addr, u32 size)
157 dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | index,
159 dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr), PCIE_ATU_LOWER_BASE);
160 dw_pcie_writel_rc(pp, upper_32_bits(cpu_addr), PCIE_ATU_UPPER_BASE);
161 dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr + size - 1),
163 dw_pcie_writel_rc(pp, lower_32_bits(pci_addr), PCIE_ATU_LOWER_TARGET);
164 dw_pcie_writel_rc(pp, upper_32_bits(pci_addr), PCIE_ATU_UPPER_TARGET);
165 dw_pcie_writel_rc(pp, type, PCIE_ATU_CR1);
166 dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
169 * Make sure ATU enable takes effect before any subsequent config
172 dw_pcie_readl_rc(pp, PCIE_ATU_CR2, &val);
175 static struct irq_chip dw_msi_irq_chip = {
177 .irq_enable = pci_msi_unmask_irq,
178 .irq_disable = pci_msi_mask_irq,
179 .irq_mask = pci_msi_mask_irq,
180 .irq_unmask = pci_msi_unmask_irq,
183 /* MSI int handler */
184 irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
188 irqreturn_t ret = IRQ_NONE;
190 for (i = 0; i < MAX_MSI_CTRLS; i++) {
191 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
196 while ((pos = find_next_bit(&val, 32, pos)) != 32) {
197 irq = irq_find_mapping(pp->irq_domain,
199 dw_pcie_wr_own_conf(pp,
200 PCIE_MSI_INTR0_STATUS + i * 12,
202 generic_handle_irq(irq);
211 void dw_pcie_msi_init(struct pcie_port *pp)
215 pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
216 msi_target = virt_to_phys((void *)pp->msi_data);
218 /* program the msi_data */
219 dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
220 (u32)(msi_target & 0xffffffff));
221 dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
222 (u32)(msi_target >> 32 & 0xffffffff));
225 static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
227 unsigned int res, bit, val;
229 res = (irq / 32) * 12;
231 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
233 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
236 static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
237 unsigned int nvec, unsigned int pos)
241 for (i = 0; i < nvec; i++) {
242 irq_set_msi_desc_off(irq_base, i, NULL);
243 /* Disable corresponding interrupt on MSI controller */
244 if (pp->ops->msi_clear_irq)
245 pp->ops->msi_clear_irq(pp, pos + i);
247 dw_pcie_msi_clear_irq(pp, pos + i);
250 bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
253 static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
255 unsigned int res, bit, val;
257 res = (irq / 32) * 12;
259 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
261 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
264 static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
267 struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(desc);
269 pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
270 order_base_2(no_irqs));
274 irq = irq_find_mapping(pp->irq_domain, pos0);
279 * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
280 * descs so there is no need to allocate descs here. We can therefore
281 * assume that if irq_find_mapping above returns non-zero, then the
282 * descs are also successfully allocated.
285 for (i = 0; i < no_irqs; i++) {
286 if (irq_set_msi_desc_off(irq, i, desc) != 0) {
287 clear_irq_range(pp, irq, i, pos0);
290 /*Enable corresponding interrupt in MSI interrupt controller */
291 if (pp->ops->msi_set_irq)
292 pp->ops->msi_set_irq(pp, pos0 + i);
294 dw_pcie_msi_set_irq(pp, pos0 + i);
298 desc->nvec_used = no_irqs;
299 desc->msi_attrib.multiple = order_base_2(no_irqs);
308 static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
313 if (pp->ops->get_msi_addr)
314 msi_target = pp->ops->get_msi_addr(pp);
316 msi_target = virt_to_phys((void *)pp->msi_data);
318 msg.address_lo = (u32)(msi_target & 0xffffffff);
319 msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
321 if (pp->ops->get_msi_data)
322 msg.data = pp->ops->get_msi_data(pp, pos);
326 pci_write_msi_msg(irq, &msg);
329 static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
330 struct msi_desc *desc)
333 struct pcie_port *pp = pdev->bus->sysdata;
335 if (desc->msi_attrib.is_msix)
338 irq = assign_irq(1, desc, &pos);
342 dw_msi_setup_msg(pp, irq, pos);
347 static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
350 #ifdef CONFIG_PCI_MSI
352 struct msi_desc *desc;
353 struct pcie_port *pp = pdev->bus->sysdata;
355 /* MSI-X interrupts are not supported */
356 if (type == PCI_CAP_ID_MSIX)
359 WARN_ON(!list_is_singular(&pdev->dev.msi_list));
360 desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
362 irq = assign_irq(nvec, desc, &pos);
366 dw_msi_setup_msg(pp, irq, pos);
374 static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
376 struct irq_data *data = irq_get_irq_data(irq);
377 struct msi_desc *msi = irq_data_get_msi_desc(data);
378 struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
380 clear_irq_range(pp, irq, 1, data->hwirq);
383 static struct msi_controller dw_pcie_msi_chip = {
384 .setup_irq = dw_msi_setup_irq,
385 .setup_irqs = dw_msi_setup_irqs,
386 .teardown_irq = dw_msi_teardown_irq,
389 int dw_pcie_wait_for_link(struct pcie_port *pp)
393 /* check if the link is up or not */
394 for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
395 if (dw_pcie_link_up(pp)) {
396 dev_info(pp->dev, "link up\n");
399 usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
402 dev_err(pp->dev, "phy link never came up\n");
407 int dw_pcie_link_up(struct pcie_port *pp)
411 if (pp->ops->link_up)
412 return pp->ops->link_up(pp);
414 val = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1);
415 return val & PCIE_PHY_DEBUG_R1_LINK_UP;
418 static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
419 irq_hw_number_t hwirq)
421 irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
422 irq_set_chip_data(irq, domain->host_data);
427 static const struct irq_domain_ops msi_domain_ops = {
428 .map = dw_pcie_msi_map,
431 int dw_pcie_host_init(struct pcie_port *pp)
433 struct device_node *np = pp->dev->of_node;
434 struct platform_device *pdev = to_platform_device(pp->dev);
435 struct pci_bus *bus, *child;
436 struct resource *cfg_res;
440 struct resource_entry *win;
442 cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
444 pp->cfg0_size = resource_size(cfg_res)/2;
445 pp->cfg1_size = resource_size(cfg_res)/2;
446 pp->cfg0_base = cfg_res->start;
447 pp->cfg1_base = cfg_res->start + pp->cfg0_size;
448 } else if (!pp->va_cfg0_base) {
449 dev_err(pp->dev, "missing *config* reg space\n");
452 ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
456 /* Get the I/O and memory ranges from DT */
457 resource_list_for_each_entry(win, &res) {
458 switch (resource_type(win->res)) {
461 pp->io->name = "I/O";
462 pp->io_size = resource_size(pp->io);
463 pp->io_bus_addr = pp->io->start - win->offset;
464 ret = pci_remap_iospace(pp->io, pp->io_base);
466 dev_warn(pp->dev, "error %d: failed to map resource %pR\n",
473 pp->mem->name = "MEM";
474 pp->mem_size = resource_size(pp->mem);
475 pp->mem_bus_addr = pp->mem->start - win->offset;
479 pp->cfg0_size = resource_size(pp->cfg)/2;
480 pp->cfg1_size = resource_size(pp->cfg)/2;
481 pp->cfg0_base = pp->cfg->start;
482 pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
493 pp->dbi_base = devm_ioremap(pp->dev, pp->cfg->start,
494 resource_size(pp->cfg));
496 dev_err(pp->dev, "error with ioremap\n");
501 pp->mem_base = pp->mem->start;
503 if (!pp->va_cfg0_base) {
504 pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
506 if (!pp->va_cfg0_base) {
507 dev_err(pp->dev, "error with ioremap in function\n");
512 if (!pp->va_cfg1_base) {
513 pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
515 if (!pp->va_cfg1_base) {
516 dev_err(pp->dev, "error with ioremap\n");
521 ret = of_property_read_u32(np, "num-lanes", &pp->lanes);
525 if (IS_ENABLED(CONFIG_PCI_MSI)) {
526 if (!pp->ops->msi_host_init) {
527 pp->irq_domain = irq_domain_add_linear(pp->dev->of_node,
528 MAX_MSI_IRQS, &msi_domain_ops,
530 if (!pp->irq_domain) {
531 dev_err(pp->dev, "irq domain init failed\n");
535 for (i = 0; i < MAX_MSI_IRQS; i++)
536 irq_create_mapping(pp->irq_domain, i);
538 ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
544 if (pp->ops->host_init)
545 pp->ops->host_init(pp);
548 * If the platform provides ->rd_other_conf, it means the platform
549 * uses its own address translation component rather than ATU, so
550 * we should not program the ATU here.
552 if (!pp->ops->rd_other_conf)
553 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
554 PCIE_ATU_TYPE_MEM, pp->mem_base,
555 pp->mem_bus_addr, pp->mem_size);
557 dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
559 /* program correct class for RC */
560 dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
562 dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
563 val |= PORT_LOGIC_SPEED_CHANGE;
564 dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
566 pp->root_bus_nr = pp->busn->start;
567 if (IS_ENABLED(CONFIG_PCI_MSI)) {
568 bus = pci_scan_root_bus_msi(pp->dev, pp->root_bus_nr,
569 &dw_pcie_ops, pp, &res,
571 dw_pcie_msi_chip.dev = pp->dev;
573 bus = pci_scan_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
578 if (pp->ops->scan_bus)
579 pp->ops->scan_bus(pp);
582 /* support old dtbs that incorrectly describe IRQs */
583 pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
586 pci_bus_size_bridges(bus);
587 pci_bus_assign_resources(bus);
589 list_for_each_entry(child, &bus->children, node)
590 pcie_bus_configure_settings(child);
592 pci_bus_add_devices(bus);
596 static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
597 u32 devfn, int where, int size, u32 *val)
600 u32 busdev, cfg_size;
602 void __iomem *va_cfg_base;
604 if (pp->ops->rd_other_conf)
605 return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
607 busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
608 PCIE_ATU_FUNC(PCI_FUNC(devfn));
610 if (bus->parent->number == pp->root_bus_nr) {
611 type = PCIE_ATU_TYPE_CFG0;
612 cpu_addr = pp->cfg0_base;
613 cfg_size = pp->cfg0_size;
614 va_cfg_base = pp->va_cfg0_base;
616 type = PCIE_ATU_TYPE_CFG1;
617 cpu_addr = pp->cfg1_base;
618 cfg_size = pp->cfg1_size;
619 va_cfg_base = pp->va_cfg1_base;
622 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
625 ret = dw_pcie_cfg_read(va_cfg_base + where, size, val);
626 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
627 PCIE_ATU_TYPE_IO, pp->io_base,
628 pp->io_bus_addr, pp->io_size);
633 static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
634 u32 devfn, int where, int size, u32 val)
637 u32 busdev, cfg_size;
639 void __iomem *va_cfg_base;
641 if (pp->ops->wr_other_conf)
642 return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
644 busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
645 PCIE_ATU_FUNC(PCI_FUNC(devfn));
647 if (bus->parent->number == pp->root_bus_nr) {
648 type = PCIE_ATU_TYPE_CFG0;
649 cpu_addr = pp->cfg0_base;
650 cfg_size = pp->cfg0_size;
651 va_cfg_base = pp->va_cfg0_base;
653 type = PCIE_ATU_TYPE_CFG1;
654 cpu_addr = pp->cfg1_base;
655 cfg_size = pp->cfg1_size;
656 va_cfg_base = pp->va_cfg1_base;
659 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
662 ret = dw_pcie_cfg_write(va_cfg_base + where, size, val);
663 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
664 PCIE_ATU_TYPE_IO, pp->io_base,
665 pp->io_bus_addr, pp->io_size);
670 static int dw_pcie_valid_config(struct pcie_port *pp,
671 struct pci_bus *bus, int dev)
673 /* If there is no link, then there is no device */
674 if (bus->number != pp->root_bus_nr) {
675 if (!dw_pcie_link_up(pp))
679 /* access only one slot on each root port */
680 if (bus->number == pp->root_bus_nr && dev > 0)
684 * do not read more than one device on the bus directly attached
685 * to RC's (Virtual Bridge's) DS side.
687 if (bus->primary == pp->root_bus_nr && dev > 0)
693 static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
696 struct pcie_port *pp = bus->sysdata;
698 if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
700 return PCIBIOS_DEVICE_NOT_FOUND;
703 if (bus->number == pp->root_bus_nr)
704 return dw_pcie_rd_own_conf(pp, where, size, val);
706 return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
709 static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
710 int where, int size, u32 val)
712 struct pcie_port *pp = bus->sysdata;
714 if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
715 return PCIBIOS_DEVICE_NOT_FOUND;
717 if (bus->number == pp->root_bus_nr)
718 return dw_pcie_wr_own_conf(pp, where, size, val);
720 return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
723 static struct pci_ops dw_pcie_ops = {
724 .read = dw_pcie_rd_conf,
725 .write = dw_pcie_wr_conf,
728 void dw_pcie_setup_rc(struct pcie_port *pp)
734 /* set the number of lanes */
735 dw_pcie_readl_rc(pp, PCIE_PORT_LINK_CONTROL, &val);
736 val &= ~PORT_LINK_MODE_MASK;
739 val |= PORT_LINK_MODE_1_LANES;
742 val |= PORT_LINK_MODE_2_LANES;
745 val |= PORT_LINK_MODE_4_LANES;
748 val |= PORT_LINK_MODE_8_LANES;
751 dev_err(pp->dev, "num-lanes %u: invalid value\n", pp->lanes);
754 dw_pcie_writel_rc(pp, val, PCIE_PORT_LINK_CONTROL);
756 /* set link width speed control register */
757 dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, &val);
758 val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
761 val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
764 val |= PORT_LOGIC_LINK_WIDTH_2_LANES;
767 val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
770 val |= PORT_LOGIC_LINK_WIDTH_8_LANES;
773 dw_pcie_writel_rc(pp, val, PCIE_LINK_WIDTH_SPEED_CONTROL);
776 dw_pcie_writel_rc(pp, 0x00000004, PCI_BASE_ADDRESS_0);
777 dw_pcie_writel_rc(pp, 0x00000000, PCI_BASE_ADDRESS_1);
779 /* setup interrupt pins */
780 dw_pcie_readl_rc(pp, PCI_INTERRUPT_LINE, &val);
783 dw_pcie_writel_rc(pp, val, PCI_INTERRUPT_LINE);
785 /* setup bus numbers */
786 dw_pcie_readl_rc(pp, PCI_PRIMARY_BUS, &val);
789 dw_pcie_writel_rc(pp, val, PCI_PRIMARY_BUS);
791 /* setup memory base, memory limit */
792 membase = ((u32)pp->mem_base & 0xfff00000) >> 16;
793 memlimit = (pp->mem_size + (u32)pp->mem_base) & 0xfff00000;
794 val = memlimit | membase;
795 dw_pcie_writel_rc(pp, val, PCI_MEMORY_BASE);
797 /* setup command register */
798 dw_pcie_readl_rc(pp, PCI_COMMAND, &val);
800 val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
801 PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
802 dw_pcie_writel_rc(pp, val, PCI_COMMAND);
806 MODULE_DESCRIPTION("Designware PCIe host controller driver");
807 MODULE_LICENSE("GPL v2");