+++ /dev/null
-// 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/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);
- fallthrough;
- case 3:
- pm |= CCR_PM_USBPW3;
- fallthrough;
- case 2:
- pm |= CCR_PM_USBPW2;
- fallthrough;
- 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,
-
- /* 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;
- }
-
- 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_hcd_setup_local_mem(hcd, sram->start, sram->start,
- resource_size(sram));
- if (ret < 0)
- goto err_enable;
-
- 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:
- 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);
- 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",
- },
-};
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