usb: isp1760: Move driver from drivers/usb/host/ to drivers/usb/isp1760/

Now that this is DRD, it doesn't make sense to keep it under
drivers/usb/host.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 312 insertions, 0 deletions

diff --git a/drivers/usb/isp1760/isp1760-if.c b/drivers/usb/isp1760/isp1760-if.c
new file mode 100644
index 000000000000..c2a94c966350
--- /dev/null
+++ b/drivers/usb/isp1760/isp1760-if.c
@@ -0,0 +1,312 @@
+/*
+ * Glue code for the ISP1760 driver and bus
+ * Currently there is support for
+ * - OpenFirmware
+ * - PCI
+ * - PDEV (generic platform device centralized driver model)
+ *
+ * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
+ *
+ */
+
+#include <linux/usb.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/usb/isp1760.h>
+#include <linux/usb/hcd.h>
+
+#include "isp1760-core.h"
+#include "isp1760-regs.h"
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#endif
+
+#ifdef CONFIG_PCI
+static int isp1761_pci_init(struct pci_dev *dev)
+{
+        resource_size_t mem_start;
+        resource_size_t mem_length;
+        u8 __iomem *iobase;
+        u8 latency, limit;
+        int retry_count;
+        u32 reg_data;
+
+        /* Grab the PLX PCI shared memory of the ISP 1761 we need  */
+        mem_start = pci_resource_start(dev, 3);
+        mem_length = pci_resource_len(dev, 3);
+        if (mem_length < 0xffff) {
+                printk(KERN_ERR "memory length for this resource is wrong\n");
+                return -ENOMEM;
+        }
+
+        if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) {
+                printk(KERN_ERR "host controller already in use\n");
+                return -EBUSY;
+        }
+
+        /* map available memory */
+        iobase = ioremap_nocache(mem_start, mem_length);
+        if (!iobase) {
+                printk(KERN_ERR "Error ioremap failed\n");
+                release_mem_region(mem_start, mem_length);
+                return -ENOMEM;
+        }
+
+        /* bad pci latencies can contribute to overruns */
+        pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
+        if (latency) {
+                pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
+                if (limit && limit < latency)
+                        pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
+        }
+
+        /* Try to check whether we can access Scratch Register of
+         * Host Controller or not. The initial PCI access is retried until
+         * local init for the PCI bridge is completed
+         */
+        retry_count = 20;
+        reg_data = 0;
+        while ((reg_data != 0xFACE) && retry_count) {
+                /*by default host is in 16bit mode, so
+                 * io operations at this stage must be 16 bit
+                 * */
+                writel(0xface, iobase + HC_SCRATCH_REG);
+                udelay(100);
+                reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff;
+                retry_count--;
+        }
+
+        iounmap(iobase);
+        release_mem_region(mem_start, mem_length);
+
+        /* Host Controller presence is detected by writing to scratch register
+         * and reading back and checking the contents are same or not
+         */
+        if (reg_data != 0xFACE) {
+                dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
+                return -ENOMEM;
+        }
+
+        /* Grab the PLX PCI mem maped port start address we need  */
+        mem_start = pci_resource_start(dev, 0);
+        mem_length = pci_resource_len(dev, 0);
+
+        if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) {
+                printk(KERN_ERR "request region #1\n");
+                return -EBUSY;
+        }
+
+        iobase = ioremap_nocache(mem_start, mem_length);
+        if (!iobase) {
+                printk(KERN_ERR "ioremap #1\n");
+                release_mem_region(mem_start, mem_length);
+                return -ENOMEM;
+        }
+
+        /* configure PLX PCI chip to pass interrupts */
+#define PLX_INT_CSR_REG 0x68
+        reg_data = readl(iobase + PLX_INT_CSR_REG);
+        reg_data |= 0x900;
+        writel(reg_data, iobase + PLX_INT_CSR_REG);
+
+        /* done with PLX IO access */
+        iounmap(iobase);
+        release_mem_region(mem_start, mem_length);
+
+        return 0;
+}
+
+static int isp1761_pci_probe(struct pci_dev *dev,
+                const struct pci_device_id *id)
+{
+        unsigned int devflags = 0;
+        int ret;
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        if (!dev->irq)
+                return -ENODEV;
+
+        if (pci_enable_device(dev) < 0)
+                return -ENODEV;
+
+        ret = isp1761_pci_init(dev);
+        if (ret < 0)
+                goto error;
+
+        pci_set_master(dev);
+
+        dev->dev.dma_mask = NULL;
+        ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev,
+                               devflags);
+        if (ret < 0)
+                goto error;
+
+        return 0;
+
+error:
+        pci_disable_device(dev);
+        return ret;
+}
+
+static void isp1761_pci_remove(struct pci_dev *dev)
+{
+        isp1760_unregister(&dev->dev);
+
+        pci_disable_device(dev);
+}
+
+static void isp1761_pci_shutdown(struct pci_dev *dev)
+{
+        printk(KERN_ERR "ips1761_pci_shutdown\n");
+}
+
+static const struct pci_device_id isp1760_plx [] = {
+        {
+                .class          = PCI_CLASS_BRIDGE_OTHER << 8,
+                .class_mask     = ~0,
+                .vendor         = PCI_VENDOR_ID_PLX,
+                .device         = 0x5406,
+                .subvendor      = PCI_VENDOR_ID_PLX,
+                .subdevice      = 0x9054,
+        },
+        { }
+};
+MODULE_DEVICE_TABLE(pci, isp1760_plx);
+
+static struct pci_driver isp1761_pci_driver = {
+        .name =         "isp1760",
+        .id_table =     isp1760_plx,
+        .probe =        isp1761_pci_probe,
+        .remove =       isp1761_pci_remove,
+        .shutdown =     isp1761_pci_shutdown,
+};
+#endif
+
+static int isp1760_plat_probe(struct platform_device *pdev)
+{
+        unsigned long irqflags;
+        unsigned int devflags = 0;
+        struct resource *mem_res;
+        struct resource *irq_res;
+        int ret;
+
+        mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+        irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (!irq_res) {
+                pr_warning("isp1760: IRQ resource not available\n");
+                return -ENODEV;
+        }
+        irqflags = irq_res->flags & IRQF_TRIGGER_MASK;
+
+        if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
+                struct device_node *dp = pdev->dev.of_node;
+                u32 bus_width = 0;
+
+                if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
+                        devflags |= ISP1760_FLAG_ISP1761;
+
+                /* Some systems wire up only 16 of the 32 data lines */
+                of_property_read_u32(dp, "bus-width", &bus_width);
+                if (bus_width == 16)
+                        devflags |= ISP1760_FLAG_BUS_WIDTH_16;
+
+                if (of_property_read_bool(dp, "port1-otg"))
+                        devflags |= ISP1760_FLAG_OTG_EN;
+
+                if (of_property_read_bool(dp, "analog-oc"))
+                        devflags |= ISP1760_FLAG_ANALOG_OC;
+
+                if (of_property_read_bool(dp, "dack-polarity"))
+                        devflags |= ISP1760_FLAG_DACK_POL_HIGH;
+
+                if (of_property_read_bool(dp, "dreq-polarity"))
+                        devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
+        } else if (dev_get_platdata(&pdev->dev)) {
+                struct isp1760_platform_data *pdata =
+                        dev_get_platdata(&pdev->dev);
+
+                if (pdata->is_isp1761)
+                        devflags |= ISP1760_FLAG_ISP1761;
+                if (pdata->bus_width_16)
+                        devflags |= ISP1760_FLAG_BUS_WIDTH_16;
+                if (pdata->port1_otg)
+                        devflags |= ISP1760_FLAG_OTG_EN;
+                if (pdata->analog_oc)
+                        devflags |= ISP1760_FLAG_ANALOG_OC;
+                if (pdata->dack_polarity_high)
+                        devflags |= ISP1760_FLAG_DACK_POL_HIGH;
+                if (pdata->dreq_polarity_high)
+                        devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
+        }
+
+        ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev,
+                               devflags);
+        if (ret < 0)
+                return ret;
+
+        pr_info("ISP1760 USB device initialised\n");
+        return 0;
+}
+
+static int isp1760_plat_remove(struct platform_device *pdev)
+{
+        isp1760_unregister(&pdev->dev);
+
+        return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id isp1760_of_match[] = {
+        { .compatible = "nxp,usb-isp1760", },
+        { .compatible = "nxp,usb-isp1761", },
+        { },
+};
+MODULE_DEVICE_TABLE(of, isp1760_of_match);
+#endif
+
+static struct platform_driver isp1760_plat_driver = {
+        .probe  = isp1760_plat_probe,
+        .remove = isp1760_plat_remove,
+        .driver = {
+                .name   = "isp1760",
+                .of_match_table = of_match_ptr(isp1760_of_match),
+        },
+};
+
+static int __init isp1760_init(void)
+{
+        int ret, any_ret = -ENODEV;
+
+        isp1760_init_kmem_once();
+
+        ret = platform_driver_register(&isp1760_plat_driver);
+        if (!ret)
+                any_ret = 0;
+#ifdef CONFIG_PCI
+        ret = pci_register_driver(&isp1761_pci_driver);
+        if (!ret)
+                any_ret = 0;
+#endif
+
+        if (any_ret)
+                isp1760_deinit_kmem_cache();
+        return any_ret;
+}
+module_init(isp1760_init);
+
+static void __exit isp1760_exit(void)
+{
+        platform_driver_unregister(&isp1760_plat_driver);
+#ifdef CONFIG_PCI
+        pci_unregister_driver(&isp1761_pci_driver);
+#endif
+        isp1760_deinit_kmem_cache();
+}
+module_exit(isp1760_exit);