/* * 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. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /*#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) return -EINVAL; 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 (!dma_declare_coherent_memory(&dev->dev, sram->start, sram->start, resource_size(sram), DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)) { ret = -EBUSY; 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", }, };