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d057ac484a
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static allocation of IRQ resources in DT core code, this causes an issue when using hierarchical interrupt domains using "interrupts" property in the node as this bypasses the hierarchical setup and messes up the irq chaining. In preparation for removal of static setup of IRQ resource from DT core code use platform_get_irq(). Also use irq_get_trigger_type to get the IRQ trigger flags. Reviewed-by: Rui Miguel Silva <rui.silva@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Link: https://lore.kernel.org/r/20211220010411.12075-5-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
304 lines
7 KiB
C
304 lines
7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Glue code for the ISP1760 driver and bus
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* Currently there is support for
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* - OpenFirmware
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* - PCI
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* - PDEV (generic platform device centralized driver model)
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*
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* (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
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* Copyright 2021 Linaro, Rui Miguel Silva <rui.silva@linaro.org>
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*
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*/
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#include <linux/usb.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/otg.h>
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#include "isp1760-core.h"
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#include "isp1760-regs.h"
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#ifdef CONFIG_USB_PCI
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#include <linux/pci.h>
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#endif
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#ifdef CONFIG_USB_PCI
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static int isp1761_pci_init(struct pci_dev *dev)
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{
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resource_size_t mem_start;
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resource_size_t mem_length;
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u8 __iomem *iobase;
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u8 latency, limit;
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int retry_count;
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u32 reg_data;
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/* Grab the PLX PCI shared memory of the ISP 1761 we need */
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mem_start = pci_resource_start(dev, 3);
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mem_length = pci_resource_len(dev, 3);
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if (mem_length < 0xffff) {
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printk(KERN_ERR "memory length for this resource is wrong\n");
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return -ENOMEM;
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}
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if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) {
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printk(KERN_ERR "host controller already in use\n");
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return -EBUSY;
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}
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/* map available memory */
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iobase = ioremap(mem_start, mem_length);
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if (!iobase) {
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printk(KERN_ERR "Error ioremap failed\n");
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release_mem_region(mem_start, mem_length);
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return -ENOMEM;
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}
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/* bad pci latencies can contribute to overruns */
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pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
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if (latency) {
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pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
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if (limit && limit < latency)
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
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}
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/* Try to check whether we can access Scratch Register of
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* Host Controller or not. The initial PCI access is retried until
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* local init for the PCI bridge is completed
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*/
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retry_count = 20;
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reg_data = 0;
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while ((reg_data != 0xFACE) && retry_count) {
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/*by default host is in 16bit mode, so
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* io operations at this stage must be 16 bit
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* */
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writel(0xface, iobase + ISP176x_HC_SCRATCH);
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udelay(100);
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reg_data = readl(iobase + ISP176x_HC_SCRATCH) & 0x0000ffff;
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retry_count--;
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}
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iounmap(iobase);
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release_mem_region(mem_start, mem_length);
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/* Host Controller presence is detected by writing to scratch register
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* and reading back and checking the contents are same or not
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*/
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if (reg_data != 0xFACE) {
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dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
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return -ENOMEM;
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}
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/* Grab the PLX PCI mem maped port start address we need */
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mem_start = pci_resource_start(dev, 0);
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mem_length = pci_resource_len(dev, 0);
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if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) {
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printk(KERN_ERR "request region #1\n");
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return -EBUSY;
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}
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iobase = ioremap(mem_start, mem_length);
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if (!iobase) {
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printk(KERN_ERR "ioremap #1\n");
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release_mem_region(mem_start, mem_length);
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return -ENOMEM;
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}
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/* configure PLX PCI chip to pass interrupts */
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#define PLX_INT_CSR_REG 0x68
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reg_data = readl(iobase + PLX_INT_CSR_REG);
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reg_data |= 0x900;
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writel(reg_data, iobase + PLX_INT_CSR_REG);
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/* done with PLX IO access */
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iounmap(iobase);
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release_mem_region(mem_start, mem_length);
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return 0;
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}
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static int isp1761_pci_probe(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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unsigned int devflags = 0;
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int ret;
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if (!dev->irq)
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return -ENODEV;
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if (pci_enable_device(dev) < 0)
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return -ENODEV;
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ret = isp1761_pci_init(dev);
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if (ret < 0)
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goto error;
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pci_set_master(dev);
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ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev,
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devflags);
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if (ret < 0)
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goto error;
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return 0;
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error:
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pci_disable_device(dev);
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return ret;
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}
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static void isp1761_pci_remove(struct pci_dev *dev)
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{
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isp1760_unregister(&dev->dev);
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pci_disable_device(dev);
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}
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static void isp1761_pci_shutdown(struct pci_dev *dev)
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{
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printk(KERN_ERR "ips1761_pci_shutdown\n");
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}
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static const struct pci_device_id isp1760_plx[] = {
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{
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.class = PCI_CLASS_BRIDGE_OTHER << 8,
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.class_mask = ~0,
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.vendor = PCI_VENDOR_ID_PLX,
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.device = 0x5406,
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.subvendor = PCI_VENDOR_ID_PLX,
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.subdevice = 0x9054,
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},
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{ }
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};
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MODULE_DEVICE_TABLE(pci, isp1760_plx);
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static struct pci_driver isp1761_pci_driver = {
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.name = "isp1760",
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.id_table = isp1760_plx,
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.probe = isp1761_pci_probe,
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.remove = isp1761_pci_remove,
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.shutdown = isp1761_pci_shutdown,
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};
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#endif
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static int isp1760_plat_probe(struct platform_device *pdev)
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{
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unsigned long irqflags;
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unsigned int devflags = 0;
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struct resource *mem_res;
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int irq;
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int ret;
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mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return irq;
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irqflags = irq_get_trigger_type(irq);
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if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
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struct device_node *dp = pdev->dev.of_node;
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u32 bus_width = 0;
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if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
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devflags |= ISP1760_FLAG_ISP1761;
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if (of_device_is_compatible(dp, "nxp,usb-isp1763"))
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devflags |= ISP1760_FLAG_ISP1763;
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/*
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* Some systems wire up only 8 of 16 data lines or
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* 16 of the 32 data lines
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*/
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of_property_read_u32(dp, "bus-width", &bus_width);
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if (bus_width == 16)
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devflags |= ISP1760_FLAG_BUS_WIDTH_16;
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else if (bus_width == 8)
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devflags |= ISP1760_FLAG_BUS_WIDTH_8;
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if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL)
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devflags |= ISP1760_FLAG_PERIPHERAL_EN;
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if (of_property_read_bool(dp, "analog-oc"))
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devflags |= ISP1760_FLAG_ANALOG_OC;
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if (of_property_read_bool(dp, "dack-polarity"))
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devflags |= ISP1760_FLAG_DACK_POL_HIGH;
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if (of_property_read_bool(dp, "dreq-polarity"))
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devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
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} else {
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pr_err("isp1760: no platform data\n");
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return -ENXIO;
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}
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ret = isp1760_register(mem_res, irq, irqflags, &pdev->dev, devflags);
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if (ret < 0)
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return ret;
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pr_info("ISP1760 USB device initialised\n");
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return 0;
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}
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static int isp1760_plat_remove(struct platform_device *pdev)
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{
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isp1760_unregister(&pdev->dev);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id isp1760_of_match[] = {
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{ .compatible = "nxp,usb-isp1760", },
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{ .compatible = "nxp,usb-isp1761", },
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{ .compatible = "nxp,usb-isp1763", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, isp1760_of_match);
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#endif
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static struct platform_driver isp1760_plat_driver = {
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.probe = isp1760_plat_probe,
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.remove = isp1760_plat_remove,
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.driver = {
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.name = "isp1760",
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.of_match_table = of_match_ptr(isp1760_of_match),
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},
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};
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static int __init isp1760_init(void)
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{
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int ret, any_ret = -ENODEV;
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isp1760_init_kmem_once();
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ret = platform_driver_register(&isp1760_plat_driver);
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if (!ret)
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any_ret = 0;
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#ifdef CONFIG_USB_PCI
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ret = pci_register_driver(&isp1761_pci_driver);
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if (!ret)
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any_ret = 0;
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#endif
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if (any_ret)
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isp1760_deinit_kmem_cache();
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return any_ret;
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}
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module_init(isp1760_init);
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static void __exit isp1760_exit(void)
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{
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platform_driver_unregister(&isp1760_plat_driver);
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#ifdef CONFIG_USB_PCI
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pci_unregister_driver(&isp1761_pci_driver);
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#endif
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isp1760_deinit_kmem_cache();
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}
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module_exit(isp1760_exit);
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