482 lines
11 KiB
C
482 lines
11 KiB
C
/*
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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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*
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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/module.h>
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#include <linux/platform_device.h>
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#include <linux/usb/isp1760.h>
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#include <linux/usb/hcd.h>
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#include "isp1760-hcd.h"
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#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_gpio.h>
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#endif
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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#endif
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#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
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struct isp1760 {
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struct usb_hcd *hcd;
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int rst_gpio;
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};
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static int of_isp1760_probe(struct platform_device *dev)
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{
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struct isp1760 *drvdata;
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struct device_node *dp = dev->dev.of_node;
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struct resource *res;
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struct resource memory;
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struct of_irq oirq;
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int virq;
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resource_size_t res_len;
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int ret;
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unsigned int devflags = 0;
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enum of_gpio_flags gpio_flags;
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u32 bus_width = 0;
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drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
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if (!drvdata)
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return -ENOMEM;
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ret = of_address_to_resource(dp, 0, &memory);
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if (ret) {
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ret = -ENXIO;
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goto free_data;
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}
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res_len = resource_size(&memory);
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res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
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if (!res) {
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ret = -EBUSY;
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goto free_data;
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}
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if (of_irq_map_one(dp, 0, &oirq)) {
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ret = -ENODEV;
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goto release_reg;
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}
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virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
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oirq.size);
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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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/* Some systems wire up only 16 of the 32 data lines */
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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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if (of_get_property(dp, "port1-otg", NULL) != NULL)
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devflags |= ISP1760_FLAG_OTG_EN;
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if (of_get_property(dp, "analog-oc", NULL) != NULL)
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devflags |= ISP1760_FLAG_ANALOG_OC;
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if (of_get_property(dp, "dack-polarity", NULL) != NULL)
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devflags |= ISP1760_FLAG_DACK_POL_HIGH;
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if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
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devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
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drvdata->rst_gpio = of_get_gpio_flags(dp, 0, &gpio_flags);
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if (gpio_is_valid(drvdata->rst_gpio)) {
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ret = gpio_request(drvdata->rst_gpio, dev_name(&dev->dev));
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if (!ret) {
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if (!(gpio_flags & OF_GPIO_ACTIVE_LOW)) {
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devflags |= ISP1760_FLAG_RESET_ACTIVE_HIGH;
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gpio_direction_output(drvdata->rst_gpio, 0);
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} else {
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gpio_direction_output(drvdata->rst_gpio, 1);
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}
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} else {
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drvdata->rst_gpio = ret;
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}
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}
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drvdata->hcd = isp1760_register(memory.start, res_len, virq,
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IRQF_SHARED, drvdata->rst_gpio,
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&dev->dev, dev_name(&dev->dev),
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devflags);
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if (IS_ERR(drvdata->hcd)) {
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ret = PTR_ERR(drvdata->hcd);
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goto free_gpio;
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}
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dev_set_drvdata(&dev->dev, drvdata);
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return ret;
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free_gpio:
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if (gpio_is_valid(drvdata->rst_gpio))
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gpio_free(drvdata->rst_gpio);
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release_reg:
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release_mem_region(memory.start, res_len);
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free_data:
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kfree(drvdata);
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return ret;
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}
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static int of_isp1760_remove(struct platform_device *dev)
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{
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struct isp1760 *drvdata = dev_get_drvdata(&dev->dev);
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dev_set_drvdata(&dev->dev, NULL);
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usb_remove_hcd(drvdata->hcd);
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iounmap(drvdata->hcd->regs);
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release_mem_region(drvdata->hcd->rsrc_start, drvdata->hcd->rsrc_len);
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usb_put_hcd(drvdata->hcd);
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if (gpio_is_valid(drvdata->rst_gpio))
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gpio_free(drvdata->rst_gpio);
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kfree(drvdata);
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return 0;
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}
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static const struct of_device_id of_isp1760_match[] = {
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{
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.compatible = "nxp,usb-isp1760",
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},
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{
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.compatible = "nxp,usb-isp1761",
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},
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{ },
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};
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MODULE_DEVICE_TABLE(of, of_isp1760_match);
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static struct platform_driver isp1760_of_driver = {
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.driver = {
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.name = "nxp-isp1760",
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.owner = THIS_MODULE,
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.of_match_table = of_isp1760_match,
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},
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.probe = of_isp1760_probe,
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.remove = of_isp1760_remove,
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};
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#endif
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#ifdef CONFIG_PCI
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static int __devinit 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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u8 latency, limit;
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__u32 reg_data;
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int retry_count;
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struct usb_hcd *hcd;
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unsigned int devflags = 0;
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int ret_status = 0;
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resource_size_t pci_mem_phy0;
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resource_size_t memlength;
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u8 __iomem *chip_addr;
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u8 __iomem *iobase;
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resource_size_t nxp_pci_io_base;
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resource_size_t iolength;
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if (usb_disabled())
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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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if (!dev->irq)
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return -ENODEV;
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/* Grab the PLX PCI mem maped port start address we need */
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nxp_pci_io_base = pci_resource_start(dev, 0);
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iolength = pci_resource_len(dev, 0);
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if (!request_mem_region(nxp_pci_io_base, iolength, "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_nocache(nxp_pci_io_base, iolength);
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if (!iobase) {
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printk(KERN_ERR "ioremap #1\n");
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ret_status = -ENOMEM;
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goto cleanup1;
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}
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/* Grab the PLX PCI shared memory of the ISP 1761 we need */
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pci_mem_phy0 = pci_resource_start(dev, 3);
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memlength = pci_resource_len(dev, 3);
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if (memlength < 0xffff) {
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printk(KERN_ERR "memory length for this resource is wrong\n");
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ret_status = -ENOMEM;
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goto cleanup2;
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}
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if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
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printk(KERN_ERR "host controller already in use\n");
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ret_status = -EBUSY;
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goto cleanup2;
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}
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/* map available memory */
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chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
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if (!chip_addr) {
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printk(KERN_ERR "Error ioremap failed\n");
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ret_status = -ENOMEM;
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goto cleanup3;
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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, chip_addr + HC_SCRATCH_REG);
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udelay(100);
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reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
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retry_count--;
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}
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iounmap(chip_addr);
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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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ret_status = -ENOMEM;
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goto cleanup3;
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}
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pci_set_master(dev);
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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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dev->dev.dma_mask = NULL;
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hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
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IRQF_SHARED, -ENOENT, &dev->dev, dev_name(&dev->dev),
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devflags);
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if (IS_ERR(hcd)) {
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ret_status = -ENODEV;
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goto cleanup3;
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}
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/* done with PLX IO access */
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iounmap(iobase);
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release_mem_region(nxp_pci_io_base, iolength);
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pci_set_drvdata(dev, hcd);
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return 0;
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cleanup3:
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release_mem_region(pci_mem_phy0, memlength);
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cleanup2:
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iounmap(iobase);
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cleanup1:
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release_mem_region(nxp_pci_io_base, iolength);
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return ret_status;
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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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struct usb_hcd *hcd;
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hcd = pci_get_drvdata(dev);
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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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 __devinit isp1760_plat_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct usb_hcd *hcd;
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struct resource *mem_res;
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struct resource *irq_res;
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resource_size_t mem_size;
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struct isp1760_platform_data *priv = pdev->dev.platform_data;
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unsigned int devflags = 0;
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unsigned long irqflags = IRQF_SHARED;
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mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!mem_res) {
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pr_warning("isp1760: Memory resource not available\n");
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ret = -ENODEV;
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goto out;
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}
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mem_size = resource_size(mem_res);
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if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
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pr_warning("isp1760: Cannot reserve the memory resource\n");
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ret = -EBUSY;
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goto out;
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}
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irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!irq_res) {
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pr_warning("isp1760: IRQ resource not available\n");
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return -ENODEV;
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}
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irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
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if (priv) {
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if (priv->is_isp1761)
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devflags |= ISP1760_FLAG_ISP1761;
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if (priv->bus_width_16)
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devflags |= ISP1760_FLAG_BUS_WIDTH_16;
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if (priv->port1_otg)
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devflags |= ISP1760_FLAG_OTG_EN;
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if (priv->analog_oc)
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devflags |= ISP1760_FLAG_ANALOG_OC;
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if (priv->dack_polarity_high)
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devflags |= ISP1760_FLAG_DACK_POL_HIGH;
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if (priv->dreq_polarity_high)
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devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
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}
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hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
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irqflags, -ENOENT,
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&pdev->dev, dev_name(&pdev->dev), devflags);
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dev_set_drvdata(&pdev->dev, hcd);
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if (IS_ERR(hcd)) {
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pr_warning("isp1760: Failed to register the HCD device\n");
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ret = -ENODEV;
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goto cleanup;
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}
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pr_info("ISP1760 USB device initialised\n");
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return ret;
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cleanup:
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release_mem_region(mem_res->start, mem_size);
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out:
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return ret;
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}
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static int __devexit isp1760_plat_remove(struct platform_device *pdev)
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{
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struct resource *mem_res;
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resource_size_t mem_size;
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struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev);
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usb_remove_hcd(hcd);
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mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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mem_size = resource_size(mem_res);
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release_mem_region(mem_res->start, mem_size);
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usb_put_hcd(hcd);
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return 0;
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}
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static struct platform_driver isp1760_plat_driver = {
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.probe = isp1760_plat_probe,
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.remove = __devexit_p(isp1760_plat_remove),
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.driver = {
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.name = "isp1760",
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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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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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#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
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ret = platform_driver_register(&isp1760_of_driver);
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if (!ret)
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any_ret = 0;
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#endif
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#ifdef CONFIG_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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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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#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
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platform_driver_unregister(&isp1760_of_driver);
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#endif
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#ifdef CONFIG_PCI
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pci_unregister_driver(&isp1761_pci_driver);
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#endif
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deinit_kmem_cache();
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}
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module_exit(isp1760_exit);
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