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path: root/drivers/usb/host/ohci-tmio.c
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Diffstat (limited to 'drivers/usb/host/ohci-tmio.c')
-rw-r--r--drivers/usb/host/ohci-tmio.c369
1 files changed, 369 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
new file mode 100644
index 000000000..702d78e0d
--- /dev/null
+++ b/drivers/usb/host/ohci-tmio.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * OHCI HCD(Host Controller Driver) for USB.
+ *
+ *(C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ *(C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ *(C) Copyright 2002 Hewlett-Packard Company
+ *
+ * Bus glue for Toshiba Mobile IO(TMIO) Controller's OHCI core
+ * (C) Copyright 2005 Chris Humbert <mahadri-usb@drigon.com>
+ * (C) Copyright 2007, 2008 Dmitry Baryshkov <dbaryshkov@gmail.com>
+ *
+ * This is known to work with the following variants:
+ * TC6393XB revision 3 (32kB SRAM)
+ *
+ * The TMIO's OHCI core DMAs through a small internal buffer that
+ * is directly addressable by the CPU.
+ *
+ * Written from sparse documentation from Toshiba and Sharp's driver
+ * for the 2.4 kernel,
+ * usb-ohci-tc6393.c(C) Copyright 2004 Lineo Solutions, Inc.
+ */
+
+/*#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/pagemap.h>
+#include <linux/namei.h>
+#include <linux/sched.h>*/
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+#include <linux/dma-mapping.h>
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * USB Host Controller Configuration Register
+ */
+#define CCR_REVID 0x08 /* b Revision ID */
+#define CCR_BASE 0x10 /* l USB Control Register Base Address Low */
+#define CCR_ILME 0x40 /* b Internal Local Memory Enable */
+#define CCR_PM 0x4c /* w Power Management */
+#define CCR_INTC 0x50 /* b INT Control */
+#define CCR_LMW1L 0x54 /* w Local Memory Window 1 LMADRS Low */
+#define CCR_LMW1H 0x56 /* w Local Memory Window 1 LMADRS High */
+#define CCR_LMW1BL 0x58 /* w Local Memory Window 1 Base Address Low */
+#define CCR_LMW1BH 0x5A /* w Local Memory Window 1 Base Address High */
+#define CCR_LMW2L 0x5C /* w Local Memory Window 2 LMADRS Low */
+#define CCR_LMW2H 0x5E /* w Local Memory Window 2 LMADRS High */
+#define CCR_LMW2BL 0x60 /* w Local Memory Window 2 Base Address Low */
+#define CCR_LMW2BH 0x62 /* w Local Memory Window 2 Base Address High */
+#define CCR_MISC 0xFC /* b MISC */
+
+#define CCR_PM_GKEN 0x0001
+#define CCR_PM_CKRNEN 0x0002
+#define CCR_PM_USBPW1 0x0004
+#define CCR_PM_USBPW2 0x0008
+#define CCR_PM_USBPW3 0x0010
+#define CCR_PM_PMEE 0x0100
+#define CCR_PM_PMES 0x8000
+
+/*-------------------------------------------------------------------------*/
+
+struct tmio_hcd {
+ void __iomem *ccr;
+ spinlock_t lock; /* protects RMW cycles */
+};
+
+#define hcd_to_tmio(hcd) ((struct tmio_hcd *)(hcd_to_ohci(hcd) + 1))
+
+/*-------------------------------------------------------------------------*/
+
+static void tmio_write_pm(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct tmio_hcd *tmio = hcd_to_tmio(hcd);
+ u16 pm;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tmio->lock, flags);
+
+ pm = CCR_PM_GKEN | CCR_PM_CKRNEN |
+ CCR_PM_PMEE | CCR_PM_PMES;
+
+ tmio_iowrite16(pm, tmio->ccr + CCR_PM);
+ spin_unlock_irqrestore(&tmio->lock, flags);
+}
+
+static void tmio_stop_hc(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ struct tmio_hcd *tmio = hcd_to_tmio(hcd);
+ u16 pm;
+
+ pm = CCR_PM_GKEN | CCR_PM_CKRNEN;
+ switch (ohci->num_ports) {
+ default:
+ dev_err(&dev->dev, "Unsupported amount of ports: %d\n", ohci->num_ports);
+ case 3:
+ pm |= CCR_PM_USBPW3;
+ case 2:
+ pm |= CCR_PM_USBPW2;
+ case 1:
+ pm |= CCR_PM_USBPW1;
+ }
+ tmio_iowrite8(0, tmio->ccr + CCR_INTC);
+ tmio_iowrite8(0, tmio->ccr + CCR_ILME);
+ tmio_iowrite16(0, tmio->ccr + CCR_BASE);
+ tmio_iowrite16(0, tmio->ccr + CCR_BASE + 2);
+ tmio_iowrite16(pm, tmio->ccr + CCR_PM);
+}
+
+static void tmio_start_hc(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct tmio_hcd *tmio = hcd_to_tmio(hcd);
+ unsigned long base = hcd->rsrc_start;
+
+ tmio_write_pm(dev);
+ tmio_iowrite16(base, tmio->ccr + CCR_BASE);
+ tmio_iowrite16(base >> 16, tmio->ccr + CCR_BASE + 2);
+ tmio_iowrite8(1, tmio->ccr + CCR_ILME);
+ tmio_iowrite8(2, tmio->ccr + CCR_INTC);
+
+ dev_info(&dev->dev, "revision %d @ 0x%08llx, irq %d\n",
+ tmio_ioread8(tmio->ccr + CCR_REVID),
+ (u64) hcd->rsrc_start, hcd->irq);
+}
+
+static int ohci_tmio_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ if ((ret = ohci_init(ohci)) < 0)
+ return ret;
+
+ if ((ret = ohci_run(ohci)) < 0) {
+ dev_err(hcd->self.controller, "can't start %s\n",
+ hcd->self.bus_name);
+ ohci_stop(hcd);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct hc_driver ohci_tmio_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "TMIO OHCI USB Host Controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd) + sizeof (struct tmio_hcd),
+
+ /* generic hardware linkage */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM,
+
+ /* basic lifecycle operations */
+ .start = ohci_tmio_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /* managing i/o requests and associated device resources */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /* scheduling support */
+ .get_frame_number = ohci_get_frame,
+
+ /* root hub support */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
+#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+/*-------------------------------------------------------------------------*/
+static struct platform_driver ohci_hcd_tmio_driver;
+
+static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
+{
+ const struct mfd_cell *cell = mfd_get_cell(dev);
+ struct resource *regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ struct resource *config = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ struct resource *sram = platform_get_resource(dev, IORESOURCE_MEM, 2);
+ int irq = platform_get_irq(dev, 0);
+ struct tmio_hcd *tmio;
+ struct ohci_hcd *ohci;
+ struct usb_hcd *hcd;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ if (!cell || !regs || !config || !sram)
+ return -EINVAL;
+
+ if (irq < 0)
+ return irq;
+
+ hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
+ if (!hcd) {
+ ret = -ENOMEM;
+ goto err_usb_create_hcd;
+ }
+
+ hcd->rsrc_start = regs->start;
+ hcd->rsrc_len = resource_size(regs);
+
+ tmio = hcd_to_tmio(hcd);
+
+ spin_lock_init(&tmio->lock);
+
+ tmio->ccr = ioremap(config->start, resource_size(config));
+ if (!tmio->ccr) {
+ ret = -ENOMEM;
+ goto err_ioremap_ccr;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ ret = -ENOMEM;
+ goto err_ioremap_regs;
+ }
+
+ ret = dma_declare_coherent_memory(&dev->dev, sram->start, sram->start,
+ resource_size(sram), DMA_MEMORY_EXCLUSIVE);
+ if (ret)
+ goto err_dma_declare;
+
+ if (cell->enable) {
+ ret = cell->enable(dev);
+ if (ret)
+ goto err_enable;
+ }
+
+ tmio_start_hc(dev);
+ ohci = hcd_to_ohci(hcd);
+ ohci_hcd_init(ohci);
+
+ ret = usb_add_hcd(hcd, irq, 0);
+ if (ret)
+ goto err_add_hcd;
+
+ device_wakeup_enable(hcd->self.controller);
+ if (ret == 0)
+ return ret;
+
+ usb_remove_hcd(hcd);
+
+err_add_hcd:
+ tmio_stop_hc(dev);
+ if (cell->disable)
+ cell->disable(dev);
+err_enable:
+ dma_release_declared_memory(&dev->dev);
+err_dma_declare:
+ iounmap(hcd->regs);
+err_ioremap_regs:
+ iounmap(tmio->ccr);
+err_ioremap_ccr:
+ usb_put_hcd(hcd);
+err_usb_create_hcd:
+
+ return ret;
+}
+
+static int ohci_hcd_tmio_drv_remove(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct tmio_hcd *tmio = hcd_to_tmio(hcd);
+ const struct mfd_cell *cell = mfd_get_cell(dev);
+
+ usb_remove_hcd(hcd);
+ tmio_stop_hc(dev);
+ if (cell->disable)
+ cell->disable(dev);
+ dma_release_declared_memory(&dev->dev);
+ iounmap(hcd->regs);
+ iounmap(tmio->ccr);
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state)
+{
+ const struct mfd_cell *cell = mfd_get_cell(dev);
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ struct tmio_hcd *tmio = hcd_to_tmio(hcd);
+ unsigned long flags;
+ u8 misc;
+ int ret;
+
+ if (time_before(jiffies, ohci->next_statechange))
+ msleep(5);
+ ohci->next_statechange = jiffies;
+
+ spin_lock_irqsave(&tmio->lock, flags);
+
+ misc = tmio_ioread8(tmio->ccr + CCR_MISC);
+ misc |= 1 << 3; /* USSUSP */
+ tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
+
+ spin_unlock_irqrestore(&tmio->lock, flags);
+
+ if (cell->suspend) {
+ ret = cell->suspend(dev);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static int ohci_hcd_tmio_drv_resume(struct platform_device *dev)
+{
+ const struct mfd_cell *cell = mfd_get_cell(dev);
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ struct tmio_hcd *tmio = hcd_to_tmio(hcd);
+ unsigned long flags;
+ u8 misc;
+ int ret;
+
+ if (time_before(jiffies, ohci->next_statechange))
+ msleep(5);
+ ohci->next_statechange = jiffies;
+
+ if (cell->resume) {
+ ret = cell->resume(dev);
+ if (ret)
+ return ret;
+ }
+
+ tmio_start_hc(dev);
+
+ spin_lock_irqsave(&tmio->lock, flags);
+
+ misc = tmio_ioread8(tmio->ccr + CCR_MISC);
+ misc &= ~(1 << 3); /* USSUSP */
+ tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
+
+ spin_unlock_irqrestore(&tmio->lock, flags);
+
+ ohci_resume(hcd, false);
+
+ return 0;
+}
+#else
+#define ohci_hcd_tmio_drv_suspend NULL
+#define ohci_hcd_tmio_drv_resume NULL
+#endif
+
+static struct platform_driver ohci_hcd_tmio_driver = {
+ .probe = ohci_hcd_tmio_drv_probe,
+ .remove = ohci_hcd_tmio_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .suspend = ohci_hcd_tmio_drv_suspend,
+ .resume = ohci_hcd_tmio_drv_resume,
+ .driver = {
+ .name = "tmio-ohci",
+ },
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 16:06:54 +0000