path: root/recipes/kexecboot/linux-kexecboot-2.6.24/tosa/0010-OHCI-driver-for-TMIO-devices.patch

From e5f06830bc8d3ef4792c9c0569825d0347b39852 Mon Sep 17 00:00:00 2001
From: Ian Molton <spyro@f2s.com>
Date: Fri, 4 Jan 2008 18:43:31 +0000
Subject: [PATCH 10/64] OHCI driver for TMIO devices

---
 drivers/usb/Kconfig          |    1 +
 drivers/usb/host/Kconfig     |    1 +
 drivers/usb/host/ohci-hcd.c  |    5 +
 drivers/usb/host/ohci-tmio.c |  369 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 376 insertions(+), 0 deletions(-)
 create mode 100644 drivers/usb/host/ohci-tmio.c

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 7580aa5..8912042 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -36,6 +36,7 @@ config USB_ARCH_HAS_OHCI
 	default y if ARCH_EP93XX
 	default y if ARCH_AT91
 	default y if ARCH_PNX4008
+	default y if MFD_TC6393XB
 	# PPC:
 	default y if STB03xxx
 	default y if PPC_MPC52xx
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 49a91c5..5ae3589 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -101,6 +101,7 @@ config USB_OHCI_HCD
 	depends on USB && USB_ARCH_HAS_OHCI
 	select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
 	select I2C if ARCH_PNX4008
+	select DMABOUNCE if MFD_TC6393XB
 	---help---
 	  The Open Host Controller Interface (OHCI) is a standard for accessing
 	  USB 1.1 host controller hardware.  It does more in hardware than Intel's
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index ecfe800..77abf3e 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1043,6 +1043,11 @@ MODULE_LICENSE ("GPL");
 #define PS3_SYSTEM_BUS_DRIVER	ps3_ohci_driver
 #endif
 
+#ifdef CONFIG_MFD_TC6393XB
+#include "ohci-tmio.c"
+#define PLATFORM_DRIVER		ohci_hcd_tmio_driver
+#endif
+
 #ifdef CONFIG_USB_OHCI_HCD_SSB
 #include "ohci-ssb.c"
 #define SSB_OHCI_DRIVER		ssb_ohci_driver
diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
new file mode 100644
index 0000000..be609f3
--- /dev/null
+++ b/drivers/usb/host/ohci-tmio.c
@@ -0,0 +1,369 @@
+/*
+ * 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>
+ *
+ * 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.  dma_declare_coherent_memory
+ * and DMA bounce buffers allow the higher-level OHCI host driver to
+ * work.  However, the dma API doesn't handle dma mapping failures
+ * well(dma_sg_map() is a prime example), so it is unusable.
+ *
+ * This HC pretends be a PIO-ish controller and uses the kernel's
+ * generic allocator for the entire SRAM.  Using the USB core's
+ * usb_operations, we provide hcd_buffer_alloc/free.  Using the OHCI's
+ * ohci_ops, we provide memory management for OHCI's TDs and EDs.  We
+ * internally queue a URB's TDs until enough dma memory is available
+ * to enqueue them with the HC.
+ *
+ * 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/init.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
+ */
+struct tmio_uhccr {
+	u8 x00[8];
+	u8	revid;	/* 0x08 Revision ID				*/
+	u8 x01[7];
+	u16	basel;	/* 0x10 USB Control Register Base Address Low	*/
+	u16	baseh;	/* 0x12 USB Control Register Base Address High	*/
+	u8 x02[0x2c];
+	u8	ilme;	/* 0x40 Internal Local Memory Enable		*/
+	u8 x03[0x0b];
+	u16	pm;	/* 0x4c Power Management			*/
+	u8 x04[2];
+	u8	intc;	/* 0x50 INT Control				*/
+	u8 x05[3];
+	u16	lmw1l;	/* 0x54 Local Memory Window 1 LMADRS Low	*/
+	u16	lmw1h;	/* 0x56 Local Memory Window 1 LMADRS High	*/
+	u16	lmw1bl;	/* 0x58 Local Memory Window 1 Base Address Low	*/
+	u16	lmw1bh;	/* 0x5A Local Memory Window 1 Base Address High	*/
+	u16	lmw2l;	/* 0x5C Local Memory Window 2 LMADRS Low	*/
+	u16	lmw2h;	/* 0x5E Local Memory Window 2 LMADRS High	*/
+	u16	lmw2bl;	/* 0x60 Local Memory Window 2 Base Address Low	*/
+	u16	lmw2bh;	/* 0x62 Local Memory Window 2 Base Address High	*/
+	u8 x06[0x98];
+	u8	misc;	/* 0xFC MISC					*/
+	u8 x07[3];
+} __attribute__((packed));
+
+#define UHCCR_PM_GKEN      0x0001
+#define UHCCR_PM_CKRNEN    0x0002
+#define UHCCR_PM_USBPW1    0x0004
+#define UHCCR_PM_USBPW2    0x0008
+#define UHCCR_PM_PMEE      0x0100
+#define UHCCR_PM_PMES      0x8000
+
+/*-------------------------------------------------------------------------*/
+
+struct tmio_hcd {
+	struct tmio_uhccr __iomem *ccr;
+};
+
+#define hcd_to_tmio(hcd)	((struct tmio_hcd *)(hcd_to_ohci(hcd) + 1))
+#define ohci_to_tmio(ohci)	((struct tmio_hcd *)(ohci + 1))
+
+/*-------------------------------------------------------------------------*/
+
+static void tmio_stop_hc(struct platform_device *dev)
+{
+	struct mfd_cell			*cell	= mfd_get_cell(dev);
+	struct usb_hcd			*hcd	= platform_get_drvdata(dev);
+	struct tmio_hcd			*tmio	= hcd_to_tmio(hcd);
+	struct tmio_uhccr __iomem	*ccr	= tmio->ccr;
+	u16				pm;
+
+	pm = UHCCR_PM_GKEN | UHCCR_PM_CKRNEN | UHCCR_PM_USBPW1 | UHCCR_PM_USBPW2;
+	iowrite8(0,		&ccr->intc);
+	iowrite8(0,		&ccr->ilme);
+	iowrite16(0,		&ccr->basel);
+	iowrite16(0,		&ccr->baseh);
+	iowrite16(pm,	&ccr->pm);
+
+	cell->disable(dev);
+}
+
+static void tmio_start_hc(struct platform_device *dev)
+{
+	struct mfd_cell			*cell	= mfd_get_cell(dev);
+	struct usb_hcd			*hcd	= platform_get_drvdata(dev);
+	struct tmio_hcd			*tmio	= hcd_to_tmio(hcd);
+	struct tmio_uhccr __iomem	*ccr	= tmio->ccr;
+	u16				pm;
+	unsigned long			base	= hcd->rsrc_start;
+
+	pm = UHCCR_PM_CKRNEN | UHCCR_PM_GKEN | UHCCR_PM_PMEE | UHCCR_PM_PMES;
+	cell->enable(dev);
+
+	iowrite16(pm,	&ccr->pm);
+	iowrite16(base,		&ccr->basel);
+	iowrite16(base >> 16,	&ccr->baseh);
+	iowrite8(1,		&ccr->ilme);
+	iowrite8(2,		&ccr->intc);
+
+	dev_info(&dev->dev, "revision %d @ 0x%08llx, irq %d\n",
+			ioread8(&ccr->revid), hcd->rsrc_start, hcd->irq);
+}
+
+static int usb_hcd_tmio_probe(const struct hc_driver *driver,
+		struct platform_device *dev)
+{
+	struct resource		*config	= platform_get_resource_byname(dev, IORESOURCE_MEM, TMIO_OHCI_CONFIG);
+	struct resource		*regs	= platform_get_resource_byname(dev, IORESOURCE_MEM, TMIO_OHCI_CONTROL);
+	struct resource		*sram	= platform_get_resource_byname(dev, IORESOURCE_MEM, TMIO_OHCI_SRAM);
+	int			irq	= platform_get_irq(dev, 0);
+	struct tmio_hcd		*tmio;
+	struct ohci_hcd		*ohci;
+	struct usb_hcd		*hcd;
+	int			retval;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	hcd = usb_create_hcd(driver, &dev->dev, dev->dev.bus_id);
+	if (!hcd) {
+		retval = -ENOMEM;
+		goto err_usb_create_hcd;
+	}
+
+	hcd->rsrc_start	= regs->start;
+	hcd->rsrc_len	= regs->end - regs->start + 1;
+
+	tmio		= hcd_to_tmio(hcd);
+
+	tmio->ccr = ioremap(config->start, config->end - config->start + 1);
+	if (!tmio->ccr) {
+		retval = -ENOMEM;
+		goto err_ioremap_ccr;
+	}
+
+	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+	if (!hcd->regs) {
+		retval = -ENOMEM;
+		goto err_ioremap_regs;
+	}
+
+	if (dma_declare_coherent_memory(&dev->dev, sram->start,
+				sram->start,
+				sram->end - sram->start + 1,
+				DMA_MEMORY_MAP) != DMA_MEMORY_MAP) {
+		retval = -EBUSY;
+		goto err_dma_declare;
+	}
+
+	retval = dmabounce_register_dev(&dev->dev, 512, 4096);
+	if (retval)
+		goto err_dmabounce_register_dev;
+
+	tmio_start_hc(dev);
+	ohci = hcd_to_ohci(hcd);
+	ohci_hcd_init(ohci);
+
+	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
+
+	if (retval == 0)
+		return retval;
+
+	tmio_stop_hc(dev);
+
+	dmabounce_unregister_dev(&dev->dev);
+err_dmabounce_register_dev:
+	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 retval;
+}
+
+static void usb_hcd_tmio_remove(struct usb_hcd *hcd, struct platform_device *dev)
+{
+	struct tmio_hcd		*tmio	= hcd_to_tmio(hcd);
+
+	usb_remove_hcd(hcd);
+	tmio_stop_hc(dev);
+	dmabounce_unregister_dev(&dev->dev);
+	dma_release_declared_memory(&dev->dev);
+	iounmap(hcd->regs);
+	iounmap(tmio->ccr);
+	usb_put_hcd(hcd);
+}
+
+static int __devinit
+ohci_tmio_start(struct usb_hcd *hcd)
+{
+	struct ohci_hcd		*ohci	= hcd_to_ohci(hcd);
+	int			retval;
+
+	if ((retval = ohci_init(ohci)) < 0)
+		return retval;
+
+	if ((retval = ohci_run(ohci)) < 0) {
+		err("can't start %s", hcd->self.bus_name);
+		ohci_stop(hcd);
+		return retval;
+	}
+
+	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,
+	.hub_irq_enable =	ohci_rhsc_enable,
+#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
+tmio_dmabounce_check(struct device *dev, dma_addr_t dma, size_t size, void *data)
+{
+	struct resource		*sram	= data;
+#ifdef DEBUG
+	printk(KERN_ERR "tmio_dmabounce_check: %08x %d\n", dma, size);
+#endif
+
+	if (dev->driver != &ohci_hcd_tmio_driver.driver)
+		return 0;
+
+	if (sram->start <= dma && dma + size <= sram->end)
+		return 0;
+
+	return 1;
+}
+
+static u64 dma_mask = DMA_32BIT_MASK;
+
+static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
+{
+	struct resource		*sram	= platform_get_resource_byname(dev, IORESOURCE_MEM, TMIO_OHCI_SRAM);
+
+	dev->dev.dma_mask = &dma_mask;
+	dev->dev.coherent_dma_mask = DMA_32BIT_MASK;
+
+	dmabounce_register_checker(tmio_dmabounce_check, sram);
+
+	return usb_hcd_tmio_probe(&ohci_tmio_hc_driver, dev);
+}
+
+static int ohci_hcd_tmio_drv_remove(struct platform_device *dev)
+{
+	struct usb_hcd		*hcd	= platform_get_drvdata(dev);
+	struct resource		*sram	= platform_get_resource_byname(dev, IORESOURCE_MEM, TMIO_OHCI_SRAM);
+
+	usb_hcd_tmio_remove(hcd, dev);
+
+	platform_set_drvdata(dev, NULL);
+
+	dmabounce_remove_checker(tmio_dmabounce_check, sram);
+
+	return 0;
+}
+
+#ifdef	CONFIG_PM
+static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct usb_hcd		*hcd	= platform_get_drvdata(dev);
+	struct ohci_hcd		*ohci	= hcd_to_ohci(hcd);
+
+	if (time_before(jiffies, ohci->next_statechange))
+		msleep(5);
+	ohci->next_statechange = jiffies;
+
+	tmio_stop_hc(dev);
+	hcd->state = HC_STATE_SUSPENDED;
+	dev->dev.power.power_state = PMSG_SUSPEND;
+
+	return 0;
+}
+
+static int ohci_hcd_tmio_drv_resume(struct platform_device *dev)
+{
+	struct usb_hcd		*hcd	= platform_get_drvdata(dev);
+	struct ohci_hcd		*ohci	= hcd_to_ohci(hcd);
+
+	if (time_before(jiffies, ohci->next_statechange))
+		msleep(5);
+	ohci->next_statechange = jiffies;
+
+	tmio_start_hc(dev);
+
+	dev->dev.power.power_state = PMSG_ON;
+	usb_hcd_resume_root_hub(hcd);
+
+	return 0;
+}
+#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,
+#ifdef CONFIG_PM
+	.suspend	= ohci_hcd_tmio_drv_suspend,
+	.resume		= ohci_hcd_tmio_drv_resume,
+#endif
+	.driver		= {
+		.name	= "tmio-ohci",
+	},
+};
-- 
1.5.3.8