drivers/usb/host/ehci-orion.c - fp2-dev/kernel/msm - Gitiles

 /*
  * drivers/usb/host/ehci-orion.c
  *
  * Tzachi Perelstein <tzachi@marvell.com>
  *
  * This file is licensed under  the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
  * warranty of any kind, whether express or implied.
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/mbus.h>
 #include <plat/ehci-orion.h>

 #define rdl(off)	__raw_readl(hcd->regs + (off))
 #define wrl(off, val)	__raw_writel((val), hcd->regs + (off))

 #define USB_CMD			0x140
 #define USB_MODE		0x1a8
 #define USB_CAUSE		0x310
 #define USB_MASK		0x314
 #define USB_WINDOW_CTRL(i)	(0x320 + ((i) << 4))
 #define USB_WINDOW_BASE(i)	(0x324 + ((i) << 4))
 #define USB_IPG			0x360
 #define USB_PHY_PWR_CTRL	0x400
 #define USB_PHY_TX_CTRL		0x420
 #define USB_PHY_RX_CTRL		0x430
 #define USB_PHY_IVREF_CTRL	0x440
 #define USB_PHY_TST_GRP_CTRL	0x450

 /*
  * Implement Orion USB controller specification guidelines
  */
 static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
 {
 	/* The below GLs are according to the Orion Errata document */
 	/*
 	 * Clear interrupt cause and mask
 	 */
 	wrl(USB_CAUSE, 0);
 	wrl(USB_MASK, 0);

 	/*
 	 * Reset controller
 	 */
 	wrl(USB_CMD, rdl(USB_CMD) | 0x2);
 	while (rdl(USB_CMD) & 0x2);

 	/*
 	 * GL# USB-10: Set IPG for non start of frame packets
 	 * Bits[14:8]=0xc
 	 */
 	wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);

 	/*
 	 * GL# USB-9: USB 2.0 Power Control
 	 * BG_VSEL[7:6]=0x1
 	 */
 	wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);

 	/*
 	 * GL# USB-1: USB PHY Tx Control - force calibration to '8'
 	 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
 	 */
 	wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);

 	/*
 	 * GL# USB-3 GL# USB-9: USB PHY Rx Control
 	 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
 	 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
 	 */
 	wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);

 	/*
 	 * GL# USB-3 GL# USB-9: USB PHY IVREF Control
 	 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
 	 */
 	wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);

 	/*
 	 * GL# USB-3 GL# USB-9: USB PHY Test Group Control
 	 * REG_FIFO_SQ_RST[15]=0
 	 */
 	wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);

 	/*
 	 * Stop and reset controller
 	 */
 	wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
 	wrl(USB_CMD, rdl(USB_CMD) | 0x2);
 	while (rdl(USB_CMD) & 0x2);

 	/*
 	 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1
 	 * TBD: This need to be done after each reset!
 	 * GL# USB-4 Setup USB Host mode
 	 */
 	wrl(USB_MODE, 0x13);
 }

 static int ehci_orion_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	int retval;

 	retval = ehci_halt(ehci);
 	if (retval)
 		return retval;

 	/*
 	 * data structure init
 	 */
 	retval = ehci_init(hcd);
 	if (retval)
 		return retval;

 	hcd->has_tt = 1;

 	ehci_reset(ehci);
 	ehci_port_power(ehci, 0);

 	return retval;
 }

 static const struct hc_driver ehci_orion_hc_driver = {
 	.description = hcd_name,
 	.product_desc = "Marvell Orion EHCI",
 	.hcd_priv_size = sizeof(struct ehci_hcd),

 	/*
 	 * generic hardware linkage
 	 */
 	.irq = ehci_irq,
 	.flags = HCD_MEMORY | HCD_USB2,

 	/*
 	 * basic lifecycle operations
 	 */
 	.reset = ehci_orion_setup,
 	.start = ehci_run,
 	.stop = ehci_stop,
 	.shutdown = ehci_shutdown,

 	/*
 	 * managing i/o requests and associated device resources
 	 */
 	.urb_enqueue = ehci_urb_enqueue,
 	.urb_dequeue = ehci_urb_dequeue,
 	.endpoint_disable = ehci_endpoint_disable,

 	/*
 	 * scheduling support
 	 */
 	.get_frame_number = ehci_get_frame,

 	/*
 	 * root hub support
 	 */
 	.hub_status_data = ehci_hub_status_data,
 	.hub_control = ehci_hub_control,
 	.bus_suspend = ehci_bus_suspend,
 	.bus_resume = ehci_bus_resume,
 	.relinquish_port = ehci_relinquish_port,
 	.port_handed_over = ehci_port_handed_over,
 };

 static void __init
 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 				struct mbus_dram_target_info *dram)
 {
 	int i;

 	for (i = 0; i < 4; i++) {
 		wrl(USB_WINDOW_CTRL(i), 0);
 		wrl(USB_WINDOW_BASE(i), 0);
 	}

 	for (i = 0; i < dram->num_cs; i++) {
 		struct mbus_dram_window *cs = dram->cs + i;

 		wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
 					(cs->mbus_attr << 8) |
 					(dram->mbus_dram_target_id << 4) | 1);
 		wrl(USB_WINDOW_BASE(i), cs->base);
 	}
 }

 static int __init ehci_orion_drv_probe(struct platform_device *pdev)
 {
 	struct orion_ehci_data *pd = pdev->dev.platform_data;
 	struct resource *res;
 	struct usb_hcd *hcd;
 	struct ehci_hcd *ehci;
 	void __iomem *regs;
 	int irq, err;

 	if (usb_disabled())
 		return -ENODEV;

 	pr_debug("Initializing Orion-SoC USB Host Controller\n");

 	irq = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
 		dev_err(&pdev->dev,
 			"Found HC with no IRQ. Check %s setup!\n",
 			dev_name(&pdev->dev));
 		err = -ENODEV;
 		goto err1;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev,
 			"Found HC with no register addr. Check %s setup!\n",
 			dev_name(&pdev->dev));
 		err = -ENODEV;
 		goto err1;
 	}

 	if (!request_mem_region(res->start, res->end - res->start + 1,
 				ehci_orion_hc_driver.description)) {
 		dev_dbg(&pdev->dev, "controller already in use\n");
 		err = -EBUSY;
 		goto err1;
 	}

 	regs = ioremap(res->start, res->end - res->start + 1);
 	if (regs == NULL) {
 		dev_dbg(&pdev->dev, "error mapping memory\n");
 		err = -EFAULT;
 		goto err2;
 	}

 	hcd = usb_create_hcd(&ehci_orion_hc_driver,
 			&pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
 		err = -ENOMEM;
 		goto err3;
 	}

 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = res->end - res->start + 1;
 	hcd->regs = regs;

 	ehci = hcd_to_ehci(hcd);
 	ehci->caps = hcd->regs + 0x100;
 	ehci->regs = hcd->regs + 0x100 +
 		HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 	hcd->has_tt = 1;
 	ehci->sbrn = 0x20;

 	/*
 	 * (Re-)program MBUS remapping windows if we are asked to.
 	 */
 	if (pd != NULL && pd->dram != NULL)
 		ehci_orion_conf_mbus_windows(hcd, pd->dram);

 	/*
 	 * setup Orion USB controller.
 	 */
 	switch (pd->phy_version) {
 	case EHCI_PHY_NA:	/* dont change USB phy settings */
 		break;
 	case EHCI_PHY_ORION:
 		orion_usb_phy_v1_setup(hcd);
 		break;
 	case EHCI_PHY_DD:
 	case EHCI_PHY_KW:
 	default:
 		printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n");
 	}

 	err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
 	if (err)
 		goto err4;

 	return 0;

 err4:
 	usb_put_hcd(hcd);
 err3:
 	iounmap(regs);
 err2:
 	release_mem_region(res->start, res->end - res->start + 1);
 err1:
 	dev_err(&pdev->dev, "init %s fail, %d\n",
 		dev_name(&pdev->dev), err);

 	return err;
 }

 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(pdev);

 	usb_remove_hcd(hcd);
 	iounmap(hcd->regs);
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 	usb_put_hcd(hcd);

 	return 0;
 }

 MODULE_ALIAS("platform:orion-ehci");

 static struct platform_driver ehci_orion_driver = {
 	.probe		= ehci_orion_drv_probe,
 	.remove		= __exit_p(ehci_orion_drv_remove),
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver.name	= "orion-ehci",
 };
	/*
	* drivers/usb/host/ehci-orion.c
	*
	* Tzachi Perelstein <tzachi@marvell.com>
	*
	* This file is licensed under the terms of the GNU General Public
	* License version 2. This program is licensed "as is" without any
	* warranty of any kind, whether express or implied.
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/mbus.h>
	#include <plat/ehci-orion.h>

	#define rdl(off) __raw_readl(hcd->regs + (off))
	#define wrl(off, val) __raw_writel((val), hcd->regs + (off))

	#define USB_CMD 0x140
	#define USB_MODE 0x1a8
	#define USB_CAUSE 0x310
	#define USB_MASK 0x314
	#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
	#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
	#define USB_IPG 0x360
	#define USB_PHY_PWR_CTRL 0x400
	#define USB_PHY_TX_CTRL 0x420
	#define USB_PHY_RX_CTRL 0x430
	#define USB_PHY_IVREF_CTRL 0x440
	#define USB_PHY_TST_GRP_CTRL 0x450

	/*
	* Implement Orion USB controller specification guidelines
	*/
	static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
	{
	/* The below GLs are according to the Orion Errata document */
	/*
	* Clear interrupt cause and mask
	*/
	wrl(USB_CAUSE, 0);
	wrl(USB_MASK, 0);

	/*
	* Reset controller
	*/
	wrl(USB_CMD, rdl(USB_CMD) \| 0x2);
	while (rdl(USB_CMD) & 0x2);

	/*
	* GL# USB-10: Set IPG for non start of frame packets
	* Bits[14:8]=0xc
	*/
	wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) \| 0xc00);

	/*
	* GL# USB-9: USB 2.0 Power Control
	* BG_VSEL[7:6]=0x1
	*/
	wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)\| 0x40);

	/*
	* GL# USB-1: USB PHY Tx Control - force calibration to '8'
	* TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
	*/
	wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) \| 0x202040);

	/*
	* GL# USB-3 GL# USB-9: USB PHY Rx Control
	* RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
	* CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
	*/
	wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) \| 0xc0000010);

	/*
	* GL# USB-3 GL# USB-9: USB PHY IVREF Control
	* PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
	*/
	wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) \| 0x32);

	/*
	* GL# USB-3 GL# USB-9: USB PHY Test Group Control
	* REG_FIFO_SQ_RST[15]=0
	*/
	wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);

	/*
	* Stop and reset controller
	*/
	wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
	wrl(USB_CMD, rdl(USB_CMD) \| 0x2);
	while (rdl(USB_CMD) & 0x2);

	/*
	* GL# USB-5 Streaming disable REG_USB_MODE[4]=1
	* TBD: This need to be done after each reset!
	* GL# USB-4 Setup USB Host mode
	*/
	wrl(USB_MODE, 0x13);
	}

	static int ehci_orion_setup(struct usb_hcd *hcd)
	{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;

	retval = ehci_halt(ehci);
	if (retval)
	return retval;

	/*
	* data structure init
	*/
	retval = ehci_init(hcd);
	if (retval)
	return retval;

	hcd->has_tt = 1;

	ehci_reset(ehci);
	ehci_port_power(ehci, 0);

	return retval;
	}

	static const struct hc_driver ehci_orion_hc_driver = {
	.description = hcd_name,
	.product_desc = "Marvell Orion EHCI",
	.hcd_priv_size = sizeof(struct ehci_hcd),

	/*
	* generic hardware linkage
	*/
	.irq = ehci_irq,
	.flags = HCD_MEMORY \| HCD_USB2,

	/*
	* basic lifecycle operations
	*/
	.reset = ehci_orion_setup,
	.start = ehci_run,
	.stop = ehci_stop,
	.shutdown = ehci_shutdown,

	/*
	* managing i/o requests and associated device resources
	*/
	.urb_enqueue = ehci_urb_enqueue,
	.urb_dequeue = ehci_urb_dequeue,
	.endpoint_disable = ehci_endpoint_disable,

	/*
	* scheduling support
	*/
	.get_frame_number = ehci_get_frame,

	/*
	* root hub support
	*/
	.hub_status_data = ehci_hub_status_data,
	.hub_control = ehci_hub_control,
	.bus_suspend = ehci_bus_suspend,
	.bus_resume = ehci_bus_resume,
	.relinquish_port = ehci_relinquish_port,
	.port_handed_over = ehci_port_handed_over,
	};

	static void __init
	ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
	struct mbus_dram_target_info *dram)
	{
	int i;

	for (i = 0; i < 4; i++) {
	wrl(USB_WINDOW_CTRL(i), 0);
	wrl(USB_WINDOW_BASE(i), 0);
	}

	for (i = 0; i < dram->num_cs; i++) {
	struct mbus_dram_window *cs = dram->cs + i;

	wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) \|
	(cs->mbus_attr << 8) \|
	(dram->mbus_dram_target_id << 4) \| 1);
	wrl(USB_WINDOW_BASE(i), cs->base);
	}
	}

	static int __init ehci_orion_drv_probe(struct platform_device *pdev)
	{
	struct orion_ehci_data *pd = pdev->dev.platform_data;
	struct resource *res;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	void __iomem *regs;
	int irq, err;

	if (usb_disabled())
	return -ENODEV;

	pr_debug("Initializing Orion-SoC USB Host Controller\n");

	irq = platform_get_irq(pdev, 0);
	if (irq <= 0) {
	dev_err(&pdev->dev,
	"Found HC with no IRQ. Check %s setup!\n",
	dev_name(&pdev->dev));
	err = -ENODEV;
	goto err1;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(&pdev->dev,
	"Found HC with no register addr. Check %s setup!\n",
	dev_name(&pdev->dev));
	err = -ENODEV;
	goto err1;
	}

	if (!request_mem_region(res->start, res->end - res->start + 1,
	ehci_orion_hc_driver.description)) {
	dev_dbg(&pdev->dev, "controller already in use\n");
	err = -EBUSY;
	goto err1;
	}

	regs = ioremap(res->start, res->end - res->start + 1);
	if (regs == NULL) {
	dev_dbg(&pdev->dev, "error mapping memory\n");
	err = -EFAULT;
	goto err2;
	}

	hcd = usb_create_hcd(&ehci_orion_hc_driver,
	&pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
	err = -ENOMEM;
	goto err3;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = res->end - res->start + 1;
	hcd->regs = regs;

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs + 0x100;
	ehci->regs = hcd->regs + 0x100 +
	HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	hcd->has_tt = 1;
	ehci->sbrn = 0x20;

	/*
	* (Re-)program MBUS remapping windows if we are asked to.
	*/
	if (pd != NULL && pd->dram != NULL)
	ehci_orion_conf_mbus_windows(hcd, pd->dram);

	/*
	* setup Orion USB controller.
	*/
	switch (pd->phy_version) {
	case EHCI_PHY_NA: /* dont change USB phy settings */
	break;
	case EHCI_PHY_ORION:
	orion_usb_phy_v1_setup(hcd);
	break;
	case EHCI_PHY_DD:
	case EHCI_PHY_KW:
	default:
	printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n");
	}

	err = usb_add_hcd(hcd, irq, IRQF_SHARED \| IRQF_DISABLED);
	if (err)
	goto err4;

	return 0;

	err4:
	usb_put_hcd(hcd);
	err3:
	iounmap(regs);
	err2:
	release_mem_region(res->start, res->end - res->start + 1);
	err1:
	dev_err(&pdev->dev, "init %s fail, %d\n",
	dev_name(&pdev->dev), err);

	return err;
	}

	static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
	{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);

	return 0;
	}

	MODULE_ALIAS("platform:orion-ehci");

	static struct platform_driver ehci_orion_driver = {
	.probe = ehci_orion_drv_probe,
	.remove = __exit_p(ehci_orion_drv_remove),
	.shutdown = usb_hcd_platform_shutdown,
	.driver.name = "orion-ehci",
	};