2 * Synopsys Designware PCIe host controller driver
4 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
7 * Author: Jingoo Han <jg1.han@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/msi.h>
18 #include <linux/of_address.h>
19 #include <linux/of_pci.h>
20 #include <linux/pci.h>
21 #include <linux/pci_regs.h>
22 #include <linux/platform_device.h>
23 #include <linux/types.h>
24 #include <linux/delay.h>
26 #include "pcie-designware.h"
28 /* Parameters for the waiting for link up routine */
29 #define LINK_WAIT_MAX_RETRIES 10
30 #define LINK_WAIT_USLEEP_MIN 90000
31 #define LINK_WAIT_USLEEP_MAX 100000
33 /* Parameters for the waiting for iATU enabled routine */
34 #define LINK_WAIT_MAX_IATU_RETRIES 5
35 #define LINK_WAIT_IATU_MIN 9000
36 #define LINK_WAIT_IATU_MAX 10000
38 /* Synopsys-specific PCIe configuration registers */
39 #define PCIE_PORT_LINK_CONTROL 0x710
40 #define PORT_LINK_MODE_MASK (0x3f << 16)
41 #define PORT_LINK_MODE_1_LANES (0x1 << 16)
42 #define PORT_LINK_MODE_2_LANES (0x3 << 16)
43 #define PORT_LINK_MODE_4_LANES (0x7 << 16)
44 #define PORT_LINK_MODE_8_LANES (0xf << 16)
46 #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
47 #define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
48 #define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8)
49 #define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
50 #define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
51 #define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
52 #define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
54 #define PCIE_MSI_ADDR_LO 0x820
55 #define PCIE_MSI_ADDR_HI 0x824
56 #define PCIE_MSI_INTR0_ENABLE 0x828
57 #define PCIE_MSI_INTR0_MASK 0x82C
58 #define PCIE_MSI_INTR0_STATUS 0x830
60 #define PCIE_ATU_VIEWPORT 0x900
61 #define PCIE_ATU_REGION_INBOUND (0x1 << 31)
62 #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
63 #define PCIE_ATU_REGION_INDEX2 (0x2 << 0)
64 #define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
65 #define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
66 #define PCIE_ATU_CR1 0x904
67 #define PCIE_ATU_TYPE_MEM (0x0 << 0)
68 #define PCIE_ATU_TYPE_IO (0x2 << 0)
69 #define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
70 #define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
71 #define PCIE_ATU_CR2 0x908
72 #define PCIE_ATU_ENABLE (0x1 << 31)
73 #define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
74 #define PCIE_ATU_LOWER_BASE 0x90C
75 #define PCIE_ATU_UPPER_BASE 0x910
76 #define PCIE_ATU_LIMIT 0x914
77 #define PCIE_ATU_LOWER_TARGET 0x918
78 #define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
79 #define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
80 #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
81 #define PCIE_ATU_UPPER_TARGET 0x91C
84 * iATU Unroll-specific register definitions
85 * From 4.80 core version the address translation will be made by unroll
87 #define PCIE_ATU_UNR_REGION_CTRL1 0x00
88 #define PCIE_ATU_UNR_REGION_CTRL2 0x04
89 #define PCIE_ATU_UNR_LOWER_BASE 0x08
90 #define PCIE_ATU_UNR_UPPER_BASE 0x0C
91 #define PCIE_ATU_UNR_LIMIT 0x10
92 #define PCIE_ATU_UNR_LOWER_TARGET 0x14
93 #define PCIE_ATU_UNR_UPPER_TARGET 0x18
95 /* Register address builder */
96 #define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) ((0x3 << 20) | (region << 9))
98 /* PCIe Port Logic registers */
99 #define PLR_OFFSET 0x700
100 #define PCIE_PHY_DEBUG_R1 (PLR_OFFSET + 0x2c)
101 #define PCIE_PHY_DEBUG_R1_LINK_UP (0x1 << 4)
102 #define PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING (0x1 << 29)
104 static struct pci_ops dw_pcie_ops;
106 int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val)
108 if ((uintptr_t)addr & (size - 1)) {
110 return PCIBIOS_BAD_REGISTER_NUMBER;
121 return PCIBIOS_BAD_REGISTER_NUMBER;
124 return PCIBIOS_SUCCESSFUL;
127 int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val)
129 if ((uintptr_t)addr & (size - 1))
130 return PCIBIOS_BAD_REGISTER_NUMBER;
139 return PCIBIOS_BAD_REGISTER_NUMBER;
141 return PCIBIOS_SUCCESSFUL;
144 static inline u32 dw_pcie_readl_rc(struct pcie_port *pp, u32 reg)
146 if (pp->ops->readl_rc)
147 return pp->ops->readl_rc(pp, pp->dbi_base + reg);
149 return readl(pp->dbi_base + reg);
152 static inline void dw_pcie_writel_rc(struct pcie_port *pp, u32 val, u32 reg)
154 if (pp->ops->writel_rc)
155 pp->ops->writel_rc(pp, val, pp->dbi_base + reg);
157 writel(val, pp->dbi_base + reg);
160 static inline u32 dw_pcie_readl_unroll(struct pcie_port *pp, u32 index, u32 reg)
162 u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
164 if (pp->ops->readl_rc)
165 return pp->ops->readl_rc(pp, pp->dbi_base + offset + reg);
167 return readl(pp->dbi_base + offset + reg);
170 static inline void dw_pcie_writel_unroll(struct pcie_port *pp, u32 index,
173 u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
175 if (pp->ops->writel_rc)
176 pp->ops->writel_rc(pp, val, pp->dbi_base + offset + reg);
178 writel(val, pp->dbi_base + offset + reg);
181 static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
184 if (pp->ops->rd_own_conf)
185 return pp->ops->rd_own_conf(pp, where, size, val);
187 return dw_pcie_cfg_read(pp->dbi_base + where, size, val);
190 static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
193 if (pp->ops->wr_own_conf)
194 return pp->ops->wr_own_conf(pp, where, size, val);
196 return dw_pcie_cfg_write(pp->dbi_base + where, size, val);
199 static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
200 int type, u64 cpu_addr, u64 pci_addr, u32 size)
204 if (pp->iatu_unroll_enabled) {
205 dw_pcie_writel_unroll(pp, index,
206 lower_32_bits(cpu_addr), PCIE_ATU_UNR_LOWER_BASE);
207 dw_pcie_writel_unroll(pp, index,
208 upper_32_bits(cpu_addr), PCIE_ATU_UNR_UPPER_BASE);
209 dw_pcie_writel_unroll(pp, index,
210 lower_32_bits(cpu_addr + size - 1), PCIE_ATU_UNR_LIMIT);
211 dw_pcie_writel_unroll(pp, index,
212 lower_32_bits(pci_addr), PCIE_ATU_UNR_LOWER_TARGET);
213 dw_pcie_writel_unroll(pp, index,
214 upper_32_bits(pci_addr), PCIE_ATU_UNR_UPPER_TARGET);
215 dw_pcie_writel_unroll(pp, index,
216 type, PCIE_ATU_UNR_REGION_CTRL1);
217 dw_pcie_writel_unroll(pp, index,
218 PCIE_ATU_ENABLE, PCIE_ATU_UNR_REGION_CTRL2);
220 dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | index,
222 dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr),
223 PCIE_ATU_LOWER_BASE);
224 dw_pcie_writel_rc(pp, upper_32_bits(cpu_addr),
225 PCIE_ATU_UPPER_BASE);
226 dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr + size - 1),
228 dw_pcie_writel_rc(pp, lower_32_bits(pci_addr),
229 PCIE_ATU_LOWER_TARGET);
230 dw_pcie_writel_rc(pp, upper_32_bits(pci_addr),
231 PCIE_ATU_UPPER_TARGET);
232 dw_pcie_writel_rc(pp, type, PCIE_ATU_CR1);
233 dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
237 * Make sure ATU enable takes effect before any subsequent config
240 for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
241 if (pp->iatu_unroll_enabled)
242 val = dw_pcie_readl_unroll(pp, index,
243 PCIE_ATU_UNR_REGION_CTRL2);
245 val = dw_pcie_readl_rc(pp, PCIE_ATU_CR2);
247 if (val == PCIE_ATU_ENABLE)
250 usleep_range(LINK_WAIT_IATU_MIN, LINK_WAIT_IATU_MAX);
252 dev_err(pp->dev, "iATU is not being enabled\n");
255 static struct irq_chip dw_msi_irq_chip = {
257 .irq_enable = pci_msi_unmask_irq,
258 .irq_disable = pci_msi_mask_irq,
259 .irq_mask = pci_msi_mask_irq,
260 .irq_unmask = pci_msi_unmask_irq,
263 /* MSI int handler */
264 irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
268 irqreturn_t ret = IRQ_NONE;
270 for (i = 0; i < MAX_MSI_CTRLS; i++) {
271 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
276 while ((pos = find_next_bit(&val, 32, pos)) != 32) {
277 irq = irq_find_mapping(pp->irq_domain,
279 dw_pcie_wr_own_conf(pp,
280 PCIE_MSI_INTR0_STATUS + i * 12,
282 generic_handle_irq(irq);
291 void dw_pcie_msi_init(struct pcie_port *pp)
295 pp->msi_data = __get_free_pages(GFP_KERNEL, 0);
296 msi_target = virt_to_phys((void *)pp->msi_data);
298 /* program the msi_data */
299 dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
300 (u32)(msi_target & 0xffffffff));
301 dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
302 (u32)(msi_target >> 32 & 0xffffffff));
305 static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
307 unsigned int res, bit, val;
309 res = (irq / 32) * 12;
311 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
313 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
316 static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base,
317 unsigned int nvec, unsigned int pos)
321 for (i = 0; i < nvec; i++) {
322 irq_set_msi_desc_off(irq_base, i, NULL);
323 /* Disable corresponding interrupt on MSI controller */
324 if (pp->ops->msi_clear_irq)
325 pp->ops->msi_clear_irq(pp, pos + i);
327 dw_pcie_msi_clear_irq(pp, pos + i);
330 bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec));
333 static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
335 unsigned int res, bit, val;
337 res = (irq / 32) * 12;
339 dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val);
341 dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val);
344 static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
347 struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(desc);
349 pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
350 order_base_2(no_irqs));
354 irq = irq_find_mapping(pp->irq_domain, pos0);
359 * irq_create_mapping (called from dw_pcie_host_init) pre-allocates
360 * descs so there is no need to allocate descs here. We can therefore
361 * assume that if irq_find_mapping above returns non-zero, then the
362 * descs are also successfully allocated.
365 for (i = 0; i < no_irqs; i++) {
366 if (irq_set_msi_desc_off(irq, i, desc) != 0) {
367 clear_irq_range(pp, irq, i, pos0);
370 /*Enable corresponding interrupt in MSI interrupt controller */
371 if (pp->ops->msi_set_irq)
372 pp->ops->msi_set_irq(pp, pos0 + i);
374 dw_pcie_msi_set_irq(pp, pos0 + i);
378 desc->nvec_used = no_irqs;
379 desc->msi_attrib.multiple = order_base_2(no_irqs);
388 static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
393 if (pp->ops->get_msi_addr)
394 msi_target = pp->ops->get_msi_addr(pp);
396 msi_target = virt_to_phys((void *)pp->msi_data);
398 msg.address_lo = (u32)(msi_target & 0xffffffff);
399 msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
401 if (pp->ops->get_msi_data)
402 msg.data = pp->ops->get_msi_data(pp, pos);
406 pci_write_msi_msg(irq, &msg);
409 static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
410 struct msi_desc *desc)
413 struct pcie_port *pp = pdev->bus->sysdata;
415 if (desc->msi_attrib.is_msix)
418 irq = assign_irq(1, desc, &pos);
422 dw_msi_setup_msg(pp, irq, pos);
427 static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev,
430 #ifdef CONFIG_PCI_MSI
432 struct msi_desc *desc;
433 struct pcie_port *pp = pdev->bus->sysdata;
435 /* MSI-X interrupts are not supported */
436 if (type == PCI_CAP_ID_MSIX)
439 WARN_ON(!list_is_singular(&pdev->dev.msi_list));
440 desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list);
442 irq = assign_irq(nvec, desc, &pos);
446 dw_msi_setup_msg(pp, irq, pos);
454 static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
456 struct irq_data *data = irq_get_irq_data(irq);
457 struct msi_desc *msi = irq_data_get_msi_desc(data);
458 struct pcie_port *pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
460 clear_irq_range(pp, irq, 1, data->hwirq);
463 static struct msi_controller dw_pcie_msi_chip = {
464 .setup_irq = dw_msi_setup_irq,
465 .setup_irqs = dw_msi_setup_irqs,
466 .teardown_irq = dw_msi_teardown_irq,
469 int dw_pcie_wait_for_link(struct pcie_port *pp)
473 /* check if the link is up or not */
474 for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
475 if (dw_pcie_link_up(pp)) {
476 dev_info(pp->dev, "link up\n");
479 usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
482 dev_err(pp->dev, "phy link never came up\n");
487 int dw_pcie_link_up(struct pcie_port *pp)
491 if (pp->ops->link_up)
492 return pp->ops->link_up(pp);
494 val = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1);
495 return ((val & PCIE_PHY_DEBUG_R1_LINK_UP) &&
496 (!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING)));
499 static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
500 irq_hw_number_t hwirq)
502 irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq);
503 irq_set_chip_data(irq, domain->host_data);
508 static const struct irq_domain_ops msi_domain_ops = {
509 .map = dw_pcie_msi_map,
512 static u8 dw_pcie_iatu_unroll_enabled(struct pcie_port *pp)
516 val = dw_pcie_readl_rc(pp, PCIE_ATU_VIEWPORT);
517 if (val == 0xffffffff)
523 int dw_pcie_host_init(struct pcie_port *pp)
525 struct device_node *np = pp->dev->of_node;
526 struct platform_device *pdev = to_platform_device(pp->dev);
527 struct pci_bus *bus, *child;
528 struct resource *cfg_res;
531 struct resource_entry *win, *tmp;
533 cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
535 pp->cfg0_size = resource_size(cfg_res)/2;
536 pp->cfg1_size = resource_size(cfg_res)/2;
537 pp->cfg0_base = cfg_res->start;
538 pp->cfg1_base = cfg_res->start + pp->cfg0_size;
539 } else if (!pp->va_cfg0_base) {
540 dev_err(pp->dev, "missing *config* reg space\n");
543 ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
547 ret = devm_request_pci_bus_resources(&pdev->dev, &res);
551 /* Get the I/O and memory ranges from DT */
552 resource_list_for_each_entry_safe(win, tmp, &res) {
553 switch (resource_type(win->res)) {
555 ret = pci_remap_iospace(win->res, pp->io_base);
557 dev_warn(pp->dev, "error %d: failed to map resource %pR\n",
559 resource_list_destroy_entry(win);
562 pp->io->name = "I/O";
563 pp->io_size = resource_size(pp->io);
564 pp->io_bus_addr = pp->io->start - win->offset;
569 pp->mem->name = "MEM";
570 pp->mem_size = resource_size(pp->mem);
571 pp->mem_bus_addr = pp->mem->start - win->offset;
575 pp->cfg0_size = resource_size(pp->cfg)/2;
576 pp->cfg1_size = resource_size(pp->cfg)/2;
577 pp->cfg0_base = pp->cfg->start;
578 pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
587 pp->dbi_base = devm_ioremap(pp->dev, pp->cfg->start,
588 resource_size(pp->cfg));
590 dev_err(pp->dev, "error with ioremap\n");
596 pp->mem_base = pp->mem->start;
598 if (!pp->va_cfg0_base) {
599 pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
601 if (!pp->va_cfg0_base) {
602 dev_err(pp->dev, "error with ioremap in function\n");
608 if (!pp->va_cfg1_base) {
609 pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
611 if (!pp->va_cfg1_base) {
612 dev_err(pp->dev, "error with ioremap\n");
618 ret = of_property_read_u32(np, "num-lanes", &pp->lanes);
622 ret = of_property_read_u32(np, "num-viewport", &pp->num_viewport);
624 pp->num_viewport = 2;
626 if (IS_ENABLED(CONFIG_PCI_MSI)) {
627 if (!pp->ops->msi_host_init) {
628 pp->irq_domain = irq_domain_add_linear(pp->dev->of_node,
629 MAX_MSI_IRQS, &msi_domain_ops,
631 if (!pp->irq_domain) {
632 dev_err(pp->dev, "irq domain init failed\n");
637 for (i = 0; i < MAX_MSI_IRQS; i++)
638 irq_create_mapping(pp->irq_domain, i);
640 ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
646 pp->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pp);
648 if (pp->ops->host_init)
649 pp->ops->host_init(pp);
651 pp->root_bus_nr = pp->busn->start;
652 if (IS_ENABLED(CONFIG_PCI_MSI)) {
653 bus = pci_scan_root_bus_msi(pp->dev, pp->root_bus_nr,
654 &dw_pcie_ops, pp, &res,
656 dw_pcie_msi_chip.dev = pp->dev;
658 bus = pci_scan_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
665 if (pp->ops->scan_bus)
666 pp->ops->scan_bus(pp);
669 /* support old dtbs that incorrectly describe IRQs */
670 pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
673 pci_bus_size_bridges(bus);
674 pci_bus_assign_resources(bus);
676 list_for_each_entry(child, &bus->children, node)
677 pcie_bus_configure_settings(child);
679 pci_bus_add_devices(bus);
683 pci_free_resource_list(&res);
687 static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
688 u32 devfn, int where, int size, u32 *val)
691 u32 busdev, cfg_size;
693 void __iomem *va_cfg_base;
695 if (pp->ops->rd_other_conf)
696 return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
698 busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
699 PCIE_ATU_FUNC(PCI_FUNC(devfn));
701 if (bus->parent->number == pp->root_bus_nr) {
702 type = PCIE_ATU_TYPE_CFG0;
703 cpu_addr = pp->cfg0_base;
704 cfg_size = pp->cfg0_size;
705 va_cfg_base = pp->va_cfg0_base;
707 type = PCIE_ATU_TYPE_CFG1;
708 cpu_addr = pp->cfg1_base;
709 cfg_size = pp->cfg1_size;
710 va_cfg_base = pp->va_cfg1_base;
713 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
716 ret = dw_pcie_cfg_read(va_cfg_base + where, size, val);
717 if (pp->num_viewport <= 2)
718 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
719 PCIE_ATU_TYPE_IO, pp->io_base,
720 pp->io_bus_addr, pp->io_size);
725 static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
726 u32 devfn, int where, int size, u32 val)
729 u32 busdev, cfg_size;
731 void __iomem *va_cfg_base;
733 if (pp->ops->wr_other_conf)
734 return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
736 busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
737 PCIE_ATU_FUNC(PCI_FUNC(devfn));
739 if (bus->parent->number == pp->root_bus_nr) {
740 type = PCIE_ATU_TYPE_CFG0;
741 cpu_addr = pp->cfg0_base;
742 cfg_size = pp->cfg0_size;
743 va_cfg_base = pp->va_cfg0_base;
745 type = PCIE_ATU_TYPE_CFG1;
746 cpu_addr = pp->cfg1_base;
747 cfg_size = pp->cfg1_size;
748 va_cfg_base = pp->va_cfg1_base;
751 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
754 ret = dw_pcie_cfg_write(va_cfg_base + where, size, val);
755 if (pp->num_viewport <= 2)
756 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
757 PCIE_ATU_TYPE_IO, pp->io_base,
758 pp->io_bus_addr, pp->io_size);
763 static int dw_pcie_valid_config(struct pcie_port *pp,
764 struct pci_bus *bus, int dev)
766 /* If there is no link, then there is no device */
767 if (bus->number != pp->root_bus_nr) {
768 if (!dw_pcie_link_up(pp))
772 /* access only one slot on each root port */
773 if (bus->number == pp->root_bus_nr && dev > 0)
779 static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
782 struct pcie_port *pp = bus->sysdata;
784 if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
786 return PCIBIOS_DEVICE_NOT_FOUND;
789 if (bus->number == pp->root_bus_nr)
790 return dw_pcie_rd_own_conf(pp, where, size, val);
792 return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
795 static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
796 int where, int size, u32 val)
798 struct pcie_port *pp = bus->sysdata;
800 if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
801 return PCIBIOS_DEVICE_NOT_FOUND;
803 if (bus->number == pp->root_bus_nr)
804 return dw_pcie_wr_own_conf(pp, where, size, val);
806 return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
809 static struct pci_ops dw_pcie_ops = {
810 .read = dw_pcie_rd_conf,
811 .write = dw_pcie_wr_conf,
814 void dw_pcie_setup_rc(struct pcie_port *pp)
818 /* set the number of lanes */
819 val = dw_pcie_readl_rc(pp, PCIE_PORT_LINK_CONTROL);
820 val &= ~PORT_LINK_MODE_MASK;
823 val |= PORT_LINK_MODE_1_LANES;
826 val |= PORT_LINK_MODE_2_LANES;
829 val |= PORT_LINK_MODE_4_LANES;
832 val |= PORT_LINK_MODE_8_LANES;
835 dev_err(pp->dev, "num-lanes %u: invalid value\n", pp->lanes);
838 dw_pcie_writel_rc(pp, val, PCIE_PORT_LINK_CONTROL);
840 /* set link width speed control register */
841 val = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL);
842 val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
845 val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
848 val |= PORT_LOGIC_LINK_WIDTH_2_LANES;
851 val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
854 val |= PORT_LOGIC_LINK_WIDTH_8_LANES;
857 dw_pcie_writel_rc(pp, val, PCIE_LINK_WIDTH_SPEED_CONTROL);
860 dw_pcie_writel_rc(pp, 0x00000004, PCI_BASE_ADDRESS_0);
861 dw_pcie_writel_rc(pp, 0x00000000, PCI_BASE_ADDRESS_1);
863 /* setup interrupt pins */
864 val = dw_pcie_readl_rc(pp, PCI_INTERRUPT_LINE);
867 dw_pcie_writel_rc(pp, val, PCI_INTERRUPT_LINE);
869 /* setup bus numbers */
870 val = dw_pcie_readl_rc(pp, PCI_PRIMARY_BUS);
873 dw_pcie_writel_rc(pp, val, PCI_PRIMARY_BUS);
875 /* setup command register */
876 val = dw_pcie_readl_rc(pp, PCI_COMMAND);
878 val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
879 PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
880 dw_pcie_writel_rc(pp, val, PCI_COMMAND);
883 * If the platform provides ->rd_other_conf, it means the platform
884 * uses its own address translation component rather than ATU, so
885 * we should not program the ATU here.
887 if (!pp->ops->rd_other_conf) {
888 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
889 PCIE_ATU_TYPE_MEM, pp->mem_base,
890 pp->mem_bus_addr, pp->mem_size);
891 if (pp->num_viewport > 2)
892 dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX2,
893 PCIE_ATU_TYPE_IO, pp->io_base,
894 pp->io_bus_addr, pp->io_size);
897 dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
899 /* program correct class for RC */
900 dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
902 dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
903 val |= PORT_LOGIC_SPEED_CHANGE;
904 dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);