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Release 4.7 drivers/usb/host/ehci-orion.c

Directory: drivers/usb/host
/*
 * 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 <linux/clk.h>
#include <linux/platform_data/usb-ehci-orion.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>

#include "ehci.h"


#define rdl(off)	readl_relaxed(hcd->regs + (off))

#define wrl(off, val)	writel_relaxed((val), hcd->regs + (off))


#define USB_CMD			0x140

#define   USB_CMD_RUN		BIT(0)

#define   USB_CMD_RESET		BIT(1)

#define USB_MODE		0x1a8

#define   USB_MODE_MASK		GENMASK(1, 0)

#define   USB_MODE_DEVICE	0x2

#define   USB_MODE_HOST		0x3

#define   USB_MODE_SDIS		BIT(4)

#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


#define DRIVER_DESC "EHCI orion driver"


#define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)


struct orion_ehci_hcd {
	
struct clk *clk;
	
struct phy *phy;
};


static const char hcd_name[] = "ehci-orion";


static struct hc_driver __read_mostly ehci_orion_hc_driver;

/*
 * 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) | USB_CMD_RESET); while (rdl(USB_CMD) & USB_CMD_RESET); /* * 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) & ~USB_CMD_RUN); wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET); while (rdl(USB_CMD) & USB_CMD_RESET); /* * 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, USB_MODE_SDIS | USB_MODE_HOST); }

Contributors

PersonTokensPropCommitsCommitProp
tzachi perelsteintzachi perelstein19095.00%133.33%
thomas petazzonithomas petazzoni84.00%133.33%
ronen shitritronen shitrit21.00%133.33%
Total200100.00%3100.00%


static void ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, const 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++) { const 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); } }

Contributors

PersonTokensPropCommitsCommitProp
lennert buytenheklennert buytenhek13298.51%150.00%
andrew lunnandrew lunn21.49%150.00%
Total134100.00%2100.00%

static const struct ehci_driver_overrides orion_overrides __initconst = { .extra_priv_size = sizeof(struct orion_ehci_hcd), };
static int ehci_orion_drv_probe(struct platform_device *pdev) { struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev); const struct mbus_dram_target_info *dram; struct resource *res; struct usb_hcd *hcd; struct ehci_hcd *ehci; void __iomem *regs; int irq, err; enum orion_ehci_phy_ver phy_version; struct orion_ehci_hcd *priv; 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 err; } /* * Right now device-tree probed devices don't get dma_mask * set. Since shared usb code relies on it, set it here for * now. Once we have dma capability bindings this can go away. */ err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (err) goto err; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(regs)) { err = PTR_ERR(regs); goto err; } hcd = usb_create_hcd(&ehci_orion_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { err = -ENOMEM; goto err; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); hcd->regs = regs; ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs + 0x100; hcd->has_tt = 1; priv = hcd_to_orion_priv(hcd); /* * Not all platforms can gate the clock, so it is not an error if * the clock does not exists. */ priv->clk = devm_clk_get(&pdev->dev, NULL); if (!IS_ERR(priv->clk)) clk_prepare_enable(priv->clk); priv->phy = devm_phy_optional_get(&pdev->dev, "usb"); if (IS_ERR(priv->phy)) { err = PTR_ERR(priv->phy); if (err != -ENOSYS) goto err_phy_get; } else { err = phy_init(priv->phy); if (err) goto err_phy_init; err = phy_power_on(priv->phy); if (err) goto err_phy_power_on; } /* * (Re-)program MBUS remapping windows if we are asked to. */ dram = mv_mbus_dram_info(); if (dram) ehci_orion_conf_mbus_windows(hcd, dram); /* * setup Orion USB controller. */ if (pdev->dev.of_node) phy_version = EHCI_PHY_NA; else phy_version = pd->phy_version; switch (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: dev_warn(&pdev->dev, "USB phy version isn't supported.\n"); } err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) goto err_add_hcd; device_wakeup_enable(hcd->self.controller); return 0; err_add_hcd: if (!IS_ERR(priv->phy)) phy_power_off(priv->phy); err_phy_power_on: if (!IS_ERR(priv->phy)) phy_exit(priv->phy); err_phy_init: err_phy_get: if (!IS_ERR(priv->clk)) clk_disable_unprepare(priv->clk); usb_put_hcd(hcd); err: dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), err); return err; }

Contributors

PersonTokensPropCommitsCommitProp
tzachi perelsteintzachi perelstein22639.03%14.76%
gregory clementgregory clement16628.67%29.52%
andrew lunnandrew lunn356.04%29.52%
ronen shitritronen shitrit284.84%14.76%
jingoo hanjingoo han213.63%314.29%
lennert buytenheklennert buytenhek213.63%14.76%
simon baatzsimon baatz132.25%14.76%
kay sieverskay sievers122.07%14.76%
russell kingrussell king111.90%29.52%
varka bhadramvarka bhadram111.90%14.76%
peter chenpeter chen91.55%14.76%
jonas gorskijonas gorski71.21%14.76%
stephen warrenstephen warren71.21%14.76%
thomas petazzonithomas petazzoni61.04%14.76%
h hartley sweetenh hartley sweeten40.69%14.76%
alan sternalan stern20.35%14.76%
Total579100.00%21100.00%


static int ehci_orion_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct orion_ehci_hcd *priv = hcd_to_orion_priv(hcd); usb_remove_hcd(hcd); if (!IS_ERR(priv->phy)) { phy_power_off(priv->phy); phy_exit(priv->phy); } if (!IS_ERR(priv->clk)) clk_disable_unprepare(priv->clk); usb_put_hcd(hcd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
gregory clementgregory clement4147.13%250.00%
tzachi perelsteintzachi perelstein3135.63%125.00%
andrew lunnandrew lunn1517.24%125.00%
Total87100.00%4100.00%

static const struct of_device_id ehci_orion_dt_ids[] = { { .compatible = "marvell,orion-ehci", }, {}, }; MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids); static struct platform_driver ehci_orion_driver = { .probe = ehci_orion_drv_probe, .remove = ehci_orion_drv_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "orion-ehci", .of_match_table = ehci_orion_dt_ids, }, };
static int __init ehci_orion_init(void) { if (usb_disabled()) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", hcd_name); ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides); return platform_driver_register(&ehci_orion_driver); }

Contributors

PersonTokensPropCommitsCommitProp
manjunath goudarmanjunath goudar4195.35%150.00%
gregory clementgregory clement24.65%150.00%
Total43100.00%2100.00%

module_init(ehci_orion_init);
static void __exit ehci_orion_cleanup(void) { platform_driver_unregister(&ehci_orion_driver); }

Contributors

PersonTokensPropCommitsCommitProp
manjunath goudarmanjunath goudar15100.00%1100.00%
Total15100.00%1100.00%

module_exit(ehci_orion_cleanup); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:orion-ehci"); MODULE_AUTHOR("Tzachi Perelstein"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
tzachi perelsteintzachi perelstein53939.96%13.85%
gregory clementgregory clement25218.68%27.69%
lennert buytenheklennert buytenhek17412.90%13.85%
manjunath goudarmanjunath goudar1198.82%13.85%
andrew lunnandrew lunn977.19%311.54%
thomas petazzonithomas petazzoni382.82%27.69%
ronen shitritronen shitrit302.22%13.85%
jingoo hanjingoo han211.56%311.54%
simon baatzsimon baatz130.96%13.85%
kay sieverskay sievers120.89%13.85%
russell kingrussell king110.82%27.69%
varka bhadramvarka bhadram110.82%13.85%
peter chenpeter chen90.67%13.85%
stephen warrenstephen warren70.52%13.85%
jonas gorskijonas gorski70.52%13.85%
h hartley sweetenh hartley sweeten40.30%13.85%
alan sternalan stern20.15%13.85%
marcin wojtasmarcin wojtas20.15%13.85%
arnd bergmannarnd bergmann10.07%13.85%
greg kroah-hartmangreg kroah-hartman0.00%00.00%
Total1349100.00%26100.00%
Directory: drivers/usb/host
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