1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright Altera Corporation (C) 2013-2015. All rights reserved
6 * Description: Altera PCIe host controller driver
9 #include <linux/delay.h>
10 #include <linux/interrupt.h>
11 #include <linux/irqchip/chained_irq.h>
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/of_address.h>
15 #include <linux/of_device.h>
16 #include <linux/of_irq.h>
17 #include <linux/of_pci.h>
18 #include <linux/pci.h>
19 #include <linux/platform_device.h>
20 #include <linux/slab.h>
24 #define RP_TX_REG0 0x2000
25 #define RP_TX_REG1 0x2004
26 #define RP_TX_CNTRL 0x2008
29 #define RP_RXCPL_STATUS 0x2010
30 #define RP_RXCPL_EOP 0x2
31 #define RP_RXCPL_SOP 0x1
32 #define RP_RXCPL_REG0 0x2014
33 #define RP_RXCPL_REG1 0x2018
34 #define P2A_INT_STATUS 0x3060
35 #define P2A_INT_STS_ALL 0xf
36 #define P2A_INT_ENABLE 0x3070
37 #define P2A_INT_ENA_ALL 0xf
38 #define RP_LTSSM 0x3c64
39 #define RP_LTSSM_MASK 0x1f
42 #define S10_RP_TX_CNTRL 0x2004
43 #define S10_RP_RXCPL_REG 0x2008
44 #define S10_RP_RXCPL_STATUS 0x200C
45 #define S10_RP_CFG_ADDR(pcie, reg) \
46 (((pcie)->hip_base) + (reg) + (1 << 20))
47 #define S10_RP_SECONDARY(pcie) \
48 readb(S10_RP_CFG_ADDR(pcie, PCI_SECONDARY_BUS))
50 /* TLP configuration type 0 and 1 */
51 #define TLP_FMTTYPE_CFGRD0 0x04 /* Configuration Read Type 0 */
52 #define TLP_FMTTYPE_CFGWR0 0x44 /* Configuration Write Type 0 */
53 #define TLP_FMTTYPE_CFGRD1 0x05 /* Configuration Read Type 1 */
54 #define TLP_FMTTYPE_CFGWR1 0x45 /* Configuration Write Type 1 */
55 #define TLP_PAYLOAD_SIZE 0x01
56 #define TLP_READ_TAG 0x1d
57 #define TLP_WRITE_TAG 0x10
59 #define TLP_REQ_ID(bus, devfn) (((bus) << 8) | (devfn))
60 #define TLP_CFG_DW0(pcie, cfg) \
63 #define TLP_CFG_DW1(pcie, tag, be) \
64 (((TLP_REQ_ID(pcie->root_bus_nr, RP_DEVFN)) << 16) | (tag << 8) | (be))
65 #define TLP_CFG_DW2(bus, devfn, offset) \
66 (((bus) << 24) | ((devfn) << 16) | (offset))
67 #define TLP_COMP_STATUS(s) (((s) >> 13) & 7)
68 #define TLP_BYTE_COUNT(s) (((s) >> 0) & 0xfff)
69 #define TLP_HDR_SIZE 3
72 #define LINK_UP_TIMEOUT HZ
73 #define LINK_RETRAIN_TIMEOUT HZ
77 #define S10_TLP_FMTTYPE_CFGRD0 0x05
78 #define S10_TLP_FMTTYPE_CFGRD1 0x04
79 #define S10_TLP_FMTTYPE_CFGWR0 0x45
80 #define S10_TLP_FMTTYPE_CFGWR1 0x44
82 enum altera_pcie_version {
88 struct platform_device *pdev;
89 void __iomem *cra_base;
90 void __iomem *hip_base;
93 struct irq_domain *irq_domain;
94 struct resource bus_range;
95 const struct altera_pcie_data *pcie_data;
98 struct altera_pcie_ops {
99 int (*tlp_read_pkt)(struct altera_pcie *pcie, u32 *value);
100 void (*tlp_write_pkt)(struct altera_pcie *pcie, u32 *headers,
101 u32 data, bool align);
102 bool (*get_link_status)(struct altera_pcie *pcie);
103 int (*rp_read_cfg)(struct altera_pcie *pcie, int where,
104 int size, u32 *value);
105 int (*rp_write_cfg)(struct altera_pcie *pcie, u8 busno,
106 int where, int size, u32 value);
109 struct altera_pcie_data {
110 const struct altera_pcie_ops *ops;
111 enum altera_pcie_version version;
112 u32 cap_offset; /* PCIe capability structure register offset */
119 struct tlp_rp_regpair_t {
125 static inline void cra_writel(struct altera_pcie *pcie, const u32 value,
128 writel_relaxed(value, pcie->cra_base + reg);
131 static inline u32 cra_readl(struct altera_pcie *pcie, const u32 reg)
133 return readl_relaxed(pcie->cra_base + reg);
136 static bool altera_pcie_link_up(struct altera_pcie *pcie)
138 return !!((cra_readl(pcie, RP_LTSSM) & RP_LTSSM_MASK) == LTSSM_L0);
141 static bool s10_altera_pcie_link_up(struct altera_pcie *pcie)
143 void __iomem *addr = S10_RP_CFG_ADDR(pcie,
144 pcie->pcie_data->cap_offset +
147 return !!(readw(addr) & PCI_EXP_LNKSTA_DLLLA);
151 * Altera PCIe port uses BAR0 of RC's configuration space as the translation
152 * from PCI bus to native BUS. Entire DDR region is mapped into PCIe space
153 * using these registers, so it can be reached by DMA from EP devices.
154 * This BAR0 will also access to MSI vector when receiving MSI/MSIX interrupt
155 * from EP devices, eventually trigger interrupt to GIC. The BAR0 of bridge
156 * should be hidden during enumeration to avoid the sizing and resource
157 * allocation by PCIe core.
159 static bool altera_pcie_hide_rc_bar(struct pci_bus *bus, unsigned int devfn,
162 if (pci_is_root_bus(bus) && (devfn == 0) &&
163 (offset == PCI_BASE_ADDRESS_0))
169 static void tlp_write_tx(struct altera_pcie *pcie,
170 struct tlp_rp_regpair_t *tlp_rp_regdata)
172 cra_writel(pcie, tlp_rp_regdata->reg0, RP_TX_REG0);
173 cra_writel(pcie, tlp_rp_regdata->reg1, RP_TX_REG1);
174 cra_writel(pcie, tlp_rp_regdata->ctrl, RP_TX_CNTRL);
177 static void s10_tlp_write_tx(struct altera_pcie *pcie, u32 reg0, u32 ctrl)
179 cra_writel(pcie, reg0, RP_TX_REG0);
180 cra_writel(pcie, ctrl, S10_RP_TX_CNTRL);
183 static bool altera_pcie_valid_device(struct altera_pcie *pcie,
184 struct pci_bus *bus, int dev)
186 /* If there is no link, then there is no device */
187 if (bus->number != pcie->root_bus_nr) {
188 if (!pcie->pcie_data->ops->get_link_status(pcie))
192 /* access only one slot on each root port */
193 if (bus->number == pcie->root_bus_nr && dev > 0)
199 static int tlp_read_packet(struct altera_pcie *pcie, u32 *value)
208 * Minimum 2 loops to read TLP headers and 1 loop to read data
211 for (i = 0; i < TLP_LOOP; i++) {
212 ctrl = cra_readl(pcie, RP_RXCPL_STATUS);
213 if ((ctrl & RP_RXCPL_SOP) || (ctrl & RP_RXCPL_EOP) || sop) {
214 reg0 = cra_readl(pcie, RP_RXCPL_REG0);
215 reg1 = cra_readl(pcie, RP_RXCPL_REG1);
217 if (ctrl & RP_RXCPL_SOP) {
219 comp_status = TLP_COMP_STATUS(reg1);
222 if (ctrl & RP_RXCPL_EOP) {
224 return PCIBIOS_DEVICE_NOT_FOUND;
229 return PCIBIOS_SUCCESSFUL;
235 return PCIBIOS_DEVICE_NOT_FOUND;
238 static int s10_tlp_read_packet(struct altera_pcie *pcie, u32 *value)
244 struct device *dev = &pcie->pdev->dev;
246 for (count = 0; count < TLP_LOOP; count++) {
247 ctrl = cra_readl(pcie, S10_RP_RXCPL_STATUS);
248 if (ctrl & RP_RXCPL_SOP) {
250 dw[0] = cra_readl(pcie, S10_RP_RXCPL_REG);
257 /* SOP detection failed, return error */
258 if (count == TLP_LOOP)
259 return PCIBIOS_DEVICE_NOT_FOUND;
264 while (count < ARRAY_SIZE(dw)) {
265 ctrl = cra_readl(pcie, S10_RP_RXCPL_STATUS);
266 dw[count++] = cra_readl(pcie, S10_RP_RXCPL_REG);
267 if (ctrl & RP_RXCPL_EOP) {
268 comp_status = TLP_COMP_STATUS(dw[1]);
270 return PCIBIOS_DEVICE_NOT_FOUND;
272 if (value && TLP_BYTE_COUNT(dw[1]) == sizeof(u32) &&
276 return PCIBIOS_SUCCESSFUL;
280 dev_warn(dev, "Malformed TLP packet\n");
282 return PCIBIOS_DEVICE_NOT_FOUND;
285 static void tlp_write_packet(struct altera_pcie *pcie, u32 *headers,
286 u32 data, bool align)
288 struct tlp_rp_regpair_t tlp_rp_regdata;
290 tlp_rp_regdata.reg0 = headers[0];
291 tlp_rp_regdata.reg1 = headers[1];
292 tlp_rp_regdata.ctrl = RP_TX_SOP;
293 tlp_write_tx(pcie, &tlp_rp_regdata);
296 tlp_rp_regdata.reg0 = headers[2];
297 tlp_rp_regdata.reg1 = 0;
298 tlp_rp_regdata.ctrl = 0;
299 tlp_write_tx(pcie, &tlp_rp_regdata);
301 tlp_rp_regdata.reg0 = data;
302 tlp_rp_regdata.reg1 = 0;
304 tlp_rp_regdata.reg0 = headers[2];
305 tlp_rp_regdata.reg1 = data;
308 tlp_rp_regdata.ctrl = RP_TX_EOP;
309 tlp_write_tx(pcie, &tlp_rp_regdata);
312 static void s10_tlp_write_packet(struct altera_pcie *pcie, u32 *headers,
313 u32 data, bool dummy)
315 s10_tlp_write_tx(pcie, headers[0], RP_TX_SOP);
316 s10_tlp_write_tx(pcie, headers[1], 0);
317 s10_tlp_write_tx(pcie, headers[2], 0);
318 s10_tlp_write_tx(pcie, data, RP_TX_EOP);
321 static void get_tlp_header(struct altera_pcie *pcie, u8 bus, u32 devfn,
322 int where, u8 byte_en, bool read, u32 *headers)
325 u8 cfg0 = read ? pcie->pcie_data->cfgrd0 : pcie->pcie_data->cfgwr0;
326 u8 cfg1 = read ? pcie->pcie_data->cfgrd1 : pcie->pcie_data->cfgwr1;
327 u8 tag = read ? TLP_READ_TAG : TLP_WRITE_TAG;
329 if (pcie->pcie_data->version == ALTERA_PCIE_V1)
330 cfg = (bus == pcie->root_bus_nr) ? cfg0 : cfg1;
332 cfg = (bus > S10_RP_SECONDARY(pcie)) ? cfg0 : cfg1;
334 headers[0] = TLP_CFG_DW0(pcie, cfg);
335 headers[1] = TLP_CFG_DW1(pcie, tag, byte_en);
336 headers[2] = TLP_CFG_DW2(bus, devfn, where);
339 static int tlp_cfg_dword_read(struct altera_pcie *pcie, u8 bus, u32 devfn,
340 int where, u8 byte_en, u32 *value)
342 u32 headers[TLP_HDR_SIZE];
344 get_tlp_header(pcie, bus, devfn, where, byte_en, true,
347 pcie->pcie_data->ops->tlp_write_pkt(pcie, headers, 0, false);
349 return pcie->pcie_data->ops->tlp_read_pkt(pcie, value);
352 static int tlp_cfg_dword_write(struct altera_pcie *pcie, u8 bus, u32 devfn,
353 int where, u8 byte_en, u32 value)
355 u32 headers[TLP_HDR_SIZE];
358 get_tlp_header(pcie, bus, devfn, where, byte_en, false,
361 /* check alignment to Qword */
362 if ((where & 0x7) == 0)
363 pcie->pcie_data->ops->tlp_write_pkt(pcie, headers,
366 pcie->pcie_data->ops->tlp_write_pkt(pcie, headers,
369 ret = pcie->pcie_data->ops->tlp_read_pkt(pcie, NULL);
370 if (ret != PCIBIOS_SUCCESSFUL)
374 * Monitor changes to PCI_PRIMARY_BUS register on root port
375 * and update local copy of root bus number accordingly.
377 if ((bus == pcie->root_bus_nr) && (where == PCI_PRIMARY_BUS))
378 pcie->root_bus_nr = (u8)(value);
380 return PCIBIOS_SUCCESSFUL;
383 static int s10_rp_read_cfg(struct altera_pcie *pcie, int where,
384 int size, u32 *value)
386 void __iomem *addr = S10_RP_CFG_ADDR(pcie, where);
390 *value = readb(addr);
393 *value = readw(addr);
396 *value = readl(addr);
400 return PCIBIOS_SUCCESSFUL;
403 static int s10_rp_write_cfg(struct altera_pcie *pcie, u8 busno,
404 int where, int size, u32 value)
406 void __iomem *addr = S10_RP_CFG_ADDR(pcie, where);
421 * Monitor changes to PCI_PRIMARY_BUS register on root port
422 * and update local copy of root bus number accordingly.
424 if (busno == pcie->root_bus_nr && where == PCI_PRIMARY_BUS)
425 pcie->root_bus_nr = value & 0xff;
427 return PCIBIOS_SUCCESSFUL;
430 static int _altera_pcie_cfg_read(struct altera_pcie *pcie, u8 busno,
431 unsigned int devfn, int where, int size,
438 if (busno == pcie->root_bus_nr && pcie->pcie_data->ops->rp_read_cfg)
439 return pcie->pcie_data->ops->rp_read_cfg(pcie, where,
444 byte_en = 1 << (where & 3);
447 byte_en = 3 << (where & 3);
454 ret = tlp_cfg_dword_read(pcie, busno, devfn,
455 (where & ~DWORD_MASK), byte_en, &data);
456 if (ret != PCIBIOS_SUCCESSFUL)
461 *value = (data >> (8 * (where & 0x3))) & 0xff;
464 *value = (data >> (8 * (where & 0x2))) & 0xffff;
471 return PCIBIOS_SUCCESSFUL;
474 static int _altera_pcie_cfg_write(struct altera_pcie *pcie, u8 busno,
475 unsigned int devfn, int where, int size,
479 u32 shift = 8 * (where & 3);
482 if (busno == pcie->root_bus_nr && pcie->pcie_data->ops->rp_write_cfg)
483 return pcie->pcie_data->ops->rp_write_cfg(pcie, busno,
488 data32 = (value & 0xff) << shift;
489 byte_en = 1 << (where & 3);
492 data32 = (value & 0xffff) << shift;
493 byte_en = 3 << (where & 3);
501 return tlp_cfg_dword_write(pcie, busno, devfn, (where & ~DWORD_MASK),
505 static int altera_pcie_cfg_read(struct pci_bus *bus, unsigned int devfn,
506 int where, int size, u32 *value)
508 struct altera_pcie *pcie = bus->sysdata;
510 if (altera_pcie_hide_rc_bar(bus, devfn, where))
511 return PCIBIOS_BAD_REGISTER_NUMBER;
513 if (!altera_pcie_valid_device(pcie, bus, PCI_SLOT(devfn)))
514 return PCIBIOS_DEVICE_NOT_FOUND;
516 return _altera_pcie_cfg_read(pcie, bus->number, devfn, where, size,
520 static int altera_pcie_cfg_write(struct pci_bus *bus, unsigned int devfn,
521 int where, int size, u32 value)
523 struct altera_pcie *pcie = bus->sysdata;
525 if (altera_pcie_hide_rc_bar(bus, devfn, where))
526 return PCIBIOS_BAD_REGISTER_NUMBER;
528 if (!altera_pcie_valid_device(pcie, bus, PCI_SLOT(devfn)))
529 return PCIBIOS_DEVICE_NOT_FOUND;
531 return _altera_pcie_cfg_write(pcie, bus->number, devfn, where, size,
535 static struct pci_ops altera_pcie_ops = {
536 .read = altera_pcie_cfg_read,
537 .write = altera_pcie_cfg_write,
540 static int altera_read_cap_word(struct altera_pcie *pcie, u8 busno,
541 unsigned int devfn, int offset, u16 *value)
546 ret = _altera_pcie_cfg_read(pcie, busno, devfn,
547 pcie->pcie_data->cap_offset + offset,
554 static int altera_write_cap_word(struct altera_pcie *pcie, u8 busno,
555 unsigned int devfn, int offset, u16 value)
557 return _altera_pcie_cfg_write(pcie, busno, devfn,
558 pcie->pcie_data->cap_offset + offset,
563 static void altera_wait_link_retrain(struct altera_pcie *pcie)
565 struct device *dev = &pcie->pdev->dev;
567 unsigned long start_jiffies;
569 /* Wait for link training end. */
570 start_jiffies = jiffies;
572 altera_read_cap_word(pcie, pcie->root_bus_nr, RP_DEVFN,
573 PCI_EXP_LNKSTA, ®16);
574 if (!(reg16 & PCI_EXP_LNKSTA_LT))
577 if (time_after(jiffies, start_jiffies + LINK_RETRAIN_TIMEOUT)) {
578 dev_err(dev, "link retrain timeout\n");
584 /* Wait for link is up */
585 start_jiffies = jiffies;
587 if (pcie->pcie_data->ops->get_link_status(pcie))
590 if (time_after(jiffies, start_jiffies + LINK_UP_TIMEOUT)) {
591 dev_err(dev, "link up timeout\n");
598 static void altera_pcie_retrain(struct altera_pcie *pcie)
600 u16 linkcap, linkstat, linkctl;
602 if (!pcie->pcie_data->ops->get_link_status(pcie))
606 * Set the retrain bit if the PCIe rootport support > 2.5GB/s, but
607 * current speed is 2.5 GB/s.
609 altera_read_cap_word(pcie, pcie->root_bus_nr, RP_DEVFN, PCI_EXP_LNKCAP,
611 if ((linkcap & PCI_EXP_LNKCAP_SLS) <= PCI_EXP_LNKCAP_SLS_2_5GB)
614 altera_read_cap_word(pcie, pcie->root_bus_nr, RP_DEVFN, PCI_EXP_LNKSTA,
616 if ((linkstat & PCI_EXP_LNKSTA_CLS) == PCI_EXP_LNKSTA_CLS_2_5GB) {
617 altera_read_cap_word(pcie, pcie->root_bus_nr, RP_DEVFN,
618 PCI_EXP_LNKCTL, &linkctl);
619 linkctl |= PCI_EXP_LNKCTL_RL;
620 altera_write_cap_word(pcie, pcie->root_bus_nr, RP_DEVFN,
621 PCI_EXP_LNKCTL, linkctl);
623 altera_wait_link_retrain(pcie);
627 static int altera_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
628 irq_hw_number_t hwirq)
630 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
631 irq_set_chip_data(irq, domain->host_data);
635 static const struct irq_domain_ops intx_domain_ops = {
636 .map = altera_pcie_intx_map,
637 .xlate = pci_irqd_intx_xlate,
640 static void altera_pcie_isr(struct irq_desc *desc)
642 struct irq_chip *chip = irq_desc_get_chip(desc);
643 struct altera_pcie *pcie;
645 unsigned long status;
649 chained_irq_enter(chip, desc);
650 pcie = irq_desc_get_handler_data(desc);
651 dev = &pcie->pdev->dev;
653 while ((status = cra_readl(pcie, P2A_INT_STATUS)
654 & P2A_INT_STS_ALL) != 0) {
655 for_each_set_bit(bit, &status, PCI_NUM_INTX) {
656 /* clear interrupts */
657 cra_writel(pcie, 1 << bit, P2A_INT_STATUS);
659 ret = generic_handle_domain_irq(pcie->irq_domain, bit);
661 dev_err_ratelimited(dev, "unexpected IRQ, INT%d\n", bit);
665 chained_irq_exit(chip, desc);
668 static int altera_pcie_init_irq_domain(struct altera_pcie *pcie)
670 struct device *dev = &pcie->pdev->dev;
671 struct device_node *node = dev->of_node;
674 pcie->irq_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
675 &intx_domain_ops, pcie);
676 if (!pcie->irq_domain) {
677 dev_err(dev, "Failed to get a INTx IRQ domain\n");
684 static void altera_pcie_irq_teardown(struct altera_pcie *pcie)
686 irq_set_chained_handler_and_data(pcie->irq, NULL, NULL);
687 irq_domain_remove(pcie->irq_domain);
688 irq_dispose_mapping(pcie->irq);
691 static int altera_pcie_parse_dt(struct altera_pcie *pcie)
693 struct platform_device *pdev = pcie->pdev;
695 pcie->cra_base = devm_platform_ioremap_resource_byname(pdev, "Cra");
696 if (IS_ERR(pcie->cra_base))
697 return PTR_ERR(pcie->cra_base);
699 if (pcie->pcie_data->version == ALTERA_PCIE_V2) {
701 devm_platform_ioremap_resource_byname(pdev, "Hip");
702 if (IS_ERR(pcie->hip_base))
703 return PTR_ERR(pcie->hip_base);
707 pcie->irq = platform_get_irq(pdev, 0);
711 irq_set_chained_handler_and_data(pcie->irq, altera_pcie_isr, pcie);
715 static void altera_pcie_host_init(struct altera_pcie *pcie)
717 altera_pcie_retrain(pcie);
720 static const struct altera_pcie_ops altera_pcie_ops_1_0 = {
721 .tlp_read_pkt = tlp_read_packet,
722 .tlp_write_pkt = tlp_write_packet,
723 .get_link_status = altera_pcie_link_up,
726 static const struct altera_pcie_ops altera_pcie_ops_2_0 = {
727 .tlp_read_pkt = s10_tlp_read_packet,
728 .tlp_write_pkt = s10_tlp_write_packet,
729 .get_link_status = s10_altera_pcie_link_up,
730 .rp_read_cfg = s10_rp_read_cfg,
731 .rp_write_cfg = s10_rp_write_cfg,
734 static const struct altera_pcie_data altera_pcie_1_0_data = {
735 .ops = &altera_pcie_ops_1_0,
737 .version = ALTERA_PCIE_V1,
738 .cfgrd0 = TLP_FMTTYPE_CFGRD0,
739 .cfgrd1 = TLP_FMTTYPE_CFGRD1,
740 .cfgwr0 = TLP_FMTTYPE_CFGWR0,
741 .cfgwr1 = TLP_FMTTYPE_CFGWR1,
744 static const struct altera_pcie_data altera_pcie_2_0_data = {
745 .ops = &altera_pcie_ops_2_0,
746 .version = ALTERA_PCIE_V2,
748 .cfgrd0 = S10_TLP_FMTTYPE_CFGRD0,
749 .cfgrd1 = S10_TLP_FMTTYPE_CFGRD1,
750 .cfgwr0 = S10_TLP_FMTTYPE_CFGWR0,
751 .cfgwr1 = S10_TLP_FMTTYPE_CFGWR1,
754 static const struct of_device_id altera_pcie_of_match[] = {
755 {.compatible = "altr,pcie-root-port-1.0",
756 .data = &altera_pcie_1_0_data },
757 {.compatible = "altr,pcie-root-port-2.0",
758 .data = &altera_pcie_2_0_data },
762 static int altera_pcie_probe(struct platform_device *pdev)
764 struct device *dev = &pdev->dev;
765 struct altera_pcie *pcie;
766 struct pci_host_bridge *bridge;
768 const struct altera_pcie_data *data;
770 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
774 pcie = pci_host_bridge_priv(bridge);
776 platform_set_drvdata(pdev, pcie);
778 data = of_device_get_match_data(&pdev->dev);
782 pcie->pcie_data = data;
784 ret = altera_pcie_parse_dt(pcie);
786 dev_err(dev, "Parsing DT failed\n");
790 ret = altera_pcie_init_irq_domain(pcie);
792 dev_err(dev, "Failed creating IRQ Domain\n");
796 /* clear all interrupts */
797 cra_writel(pcie, P2A_INT_STS_ALL, P2A_INT_STATUS);
798 /* enable all interrupts */
799 cra_writel(pcie, P2A_INT_ENA_ALL, P2A_INT_ENABLE);
800 altera_pcie_host_init(pcie);
802 bridge->sysdata = pcie;
803 bridge->busnr = pcie->root_bus_nr;
804 bridge->ops = &altera_pcie_ops;
806 return pci_host_probe(bridge);
809 static int altera_pcie_remove(struct platform_device *pdev)
811 struct altera_pcie *pcie = platform_get_drvdata(pdev);
812 struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
814 pci_stop_root_bus(bridge->bus);
815 pci_remove_root_bus(bridge->bus);
816 altera_pcie_irq_teardown(pcie);
821 static struct platform_driver altera_pcie_driver = {
822 .probe = altera_pcie_probe,
823 .remove = altera_pcie_remove,
825 .name = "altera-pcie",
826 .of_match_table = altera_pcie_of_match,
830 MODULE_DEVICE_TABLE(of, altera_pcie_of_match);
831 module_platform_driver(altera_pcie_driver);
832 MODULE_LICENSE("GPL v2");