diff options
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/host/Kconfig | 9 | ||||
-rw-r--r-- | drivers/usb/host/ehci-hcd.c | 5 | ||||
-rw-r--r-- | drivers/usb/host/ehci-mv.c | 391 |
3 files changed, 405 insertions, 0 deletions
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 060e0e2..a52769b 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -194,6 +194,15 @@ config USB_EHCI_S5P help Enable support for the S5P SOC's on-chip EHCI controller. +config USB_EHCI_MV + bool "EHCI support for Marvell on-chip controller" + depends on USB_EHCI_HCD + select USB_EHCI_ROOT_HUB_TT + ---help--- + Enables support for Marvell (including PXA and MMP series) on-chip + USB SPH and OTG controller. SPH is a single port host, and it can + only be EHCI host. OTG is controller that can switch to host mode. + config USB_W90X900_EHCI bool "W90X900(W90P910) EHCI support" depends on USB_EHCI_HCD && ARCH_W90X900 diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 3ff9f82..b05e753 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1329,6 +1329,11 @@ MODULE_LICENSE ("GPL"); #define PLATFORM_DRIVER ehci_xls_driver #endif +#ifdef CONFIG_USB_EHCI_MV +#include "ehci-mv.c" +#define PLATFORM_DRIVER ehci_mv_driver +#endif + #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \ !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \ !defined(XILINX_OF_PLATFORM_DRIVER) diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c new file mode 100644 index 0000000..52a604f --- /dev/null +++ b/drivers/usb/host/ehci-mv.c @@ -0,0 +1,391 @@ +/* + * Copyright (C) 2011 Marvell International Ltd. All rights reserved. + * Author: Chao Xie <chao.xie@marvell.com> + * Neil Zhang <zhangwm@marvell.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/usb/otg.h> +#include <linux/platform_data/mv_usb.h> + +#define CAPLENGTH_MASK (0xff) + +struct ehci_hcd_mv { + struct usb_hcd *hcd; + + /* Which mode does this ehci running OTG/Host ? */ + int mode; + + void __iomem *phy_regs; + void __iomem *cap_regs; + void __iomem *op_regs; + + struct otg_transceiver *otg; + + struct mv_usb_platform_data *pdata; + + /* clock source and total clock number */ + unsigned int clknum; + struct clk *clk[0]; +}; + +static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv) +{ + unsigned int i; + + for (i = 0; i < ehci_mv->clknum; i++) + clk_enable(ehci_mv->clk[i]); +} + +static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv) +{ + unsigned int i; + + for (i = 0; i < ehci_mv->clknum; i++) + clk_disable(ehci_mv->clk[i]); +} + +static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv) +{ + int retval; + + ehci_clock_enable(ehci_mv); + if (ehci_mv->pdata->phy_init) { + retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs); + if (retval) + return retval; + } + + return 0; +} + +static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv) +{ + if (ehci_mv->pdata->phy_deinit) + ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs); + ehci_clock_disable(ehci_mv); +} + +static int mv_ehci_reset(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + struct device *dev = hcd->self.controller; + struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev); + int retval; + + if (ehci_mv == NULL) { + dev_err(dev, "Can not find private ehci data\n"); + return -ENODEV; + } + + /* + * data structure init + */ + retval = ehci_init(hcd); + if (retval) { + dev_err(dev, "ehci_init failed %d\n", retval); + return retval; + } + + hcd->has_tt = 1; + ehci->sbrn = 0x20; + + retval = ehci_reset(ehci); + if (retval) { + dev_err(dev, "ehci_reset failed %d\n", retval); + return retval; + } + + return 0; +} + +static const struct hc_driver mv_ehci_hc_driver = { + .description = hcd_name, + .product_desc = "Marvell EHCI", + .hcd_priv_size = sizeof(struct ehci_hcd), + + /* + * generic hardware linkage + */ + .irq = ehci_irq, + .flags = HCD_MEMORY | HCD_USB2, + + /* + * basic lifecycle operations + */ + .reset = mv_ehci_reset, + .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, + .endpoint_reset = ehci_endpoint_reset, + .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, + + /* + * 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, +}; + +static int mv_ehci_probe(struct platform_device *pdev) +{ + struct mv_usb_platform_data *pdata = pdev->dev.platform_data; + struct usb_hcd *hcd; + struct ehci_hcd *ehci; + struct ehci_hcd_mv *ehci_mv; + struct resource *r; + int clk_i, retval = -ENODEV; + u32 offset; + size_t size; + + if (!pdata) { + dev_err(&pdev->dev, "missing platform_data\n"); + return -ENODEV; + } + + if (usb_disabled()) + return -ENODEV; + + hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci"); + if (!hcd) + return -ENOMEM; + + size = sizeof(*ehci_mv) + sizeof(struct clk *) * pdata->clknum; + ehci_mv = kzalloc(size, GFP_KERNEL); + if (ehci_mv == NULL) { + dev_err(&pdev->dev, "cannot allocate ehci_hcd_mv\n"); + retval = -ENOMEM; + goto err_put_hcd; + } + + platform_set_drvdata(pdev, ehci_mv); + ehci_mv->pdata = pdata; + ehci_mv->hcd = hcd; + + ehci_mv->clknum = pdata->clknum; + for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++) { + ehci_mv->clk[clk_i] = + clk_get(&pdev->dev, pdata->clkname[clk_i]); + if (IS_ERR(ehci_mv->clk[clk_i])) { + dev_err(&pdev->dev, "error get clck \"%s\"\n", + pdata->clkname[clk_i]); + retval = PTR_ERR(ehci_mv->clk[clk_i]); + goto err_put_clk; + } + } + + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs"); + if (r == NULL) { + dev_err(&pdev->dev, "no phy I/O memory resource defined\n"); + retval = -ENODEV; + goto err_put_clk; + } + + ehci_mv->phy_regs = ioremap(r->start, resource_size(r)); + if (ehci_mv->phy_regs == 0) { + dev_err(&pdev->dev, "failed to map phy I/O memory\n"); + retval = -EFAULT; + goto err_put_clk; + } + + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs"); + if (!r) { + dev_err(&pdev->dev, "no I/O memory resource defined\n"); + retval = -ENODEV; + goto err_iounmap_phyreg; + } + + ehci_mv->cap_regs = ioremap(r->start, resource_size(r)); + if (ehci_mv->cap_regs == NULL) { + dev_err(&pdev->dev, "failed to map I/O memory\n"); + retval = -EFAULT; + goto err_iounmap_phyreg; + } + + retval = mv_ehci_enable(ehci_mv); + if (retval) { + dev_err(&pdev->dev, "init phy error %d\n", retval); + goto err_iounmap_capreg; + } + + offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK; + ehci_mv->op_regs = + (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset); + + hcd->rsrc_start = r->start; + hcd->rsrc_len = r->end - r->start + 1; + hcd->regs = ehci_mv->op_regs; + + hcd->irq = platform_get_irq(pdev, 0); + if (!hcd->irq) { + dev_err(&pdev->dev, "Cannot get irq."); + retval = -ENODEV; + goto err_disable_clk; + } + + ehci = hcd_to_ehci(hcd); + ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs; + ehci->regs = (struct ehci_regs *) ehci_mv->op_regs; + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); + + ehci_mv->mode = pdata->mode; + if (ehci_mv->mode == MV_USB_MODE_OTG) { +#ifdef CONFIG_USB_OTG_UTILS + ehci_mv->otg = otg_get_transceiver(); + if (!ehci_mv->otg) { + dev_err(&pdev->dev, + "unable to find transceiver\n"); + retval = -ENODEV; + goto err_disable_clk; + } + + retval = otg_set_host(ehci_mv->otg, &hcd->self); + if (retval < 0) { + dev_err(&pdev->dev, + "unable to register with transceiver\n"); + retval = -ENODEV; + goto err_put_transceiver; + } + /* otg will enable clock before use as host */ + mv_ehci_disable(ehci_mv); +#else + dev_info(&pdev->dev, "MV_USB_MODE_OTG " + "must have CONFIG_USB_OTG_UTILS enabled\n"); + goto err_disable_clk; +#endif + } else { + if (pdata->set_vbus) + pdata->set_vbus(1); + + retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED); + if (retval) { + dev_err(&pdev->dev, + "failed to add hcd with err %d\n", retval); + goto err_set_vbus; + } + } + + if (pdata->private_init) + pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs); + + dev_info(&pdev->dev, + "successful find EHCI device with regs 0x%p irq %d" + " working in %s mode\n", hcd->regs, hcd->irq, + ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host"); + + return 0; + +err_set_vbus: + if (pdata->set_vbus) + pdata->set_vbus(0); +#ifdef CONFIG_USB_OTG_UTILS +err_put_transceiver: + if (ehci_mv->otg) + otg_put_transceiver(ehci_mv->otg); +#endif +err_disable_clk: + mv_ehci_disable(ehci_mv); +err_iounmap_capreg: + iounmap(ehci_mv->cap_regs); +err_iounmap_phyreg: + iounmap(ehci_mv->phy_regs); +err_put_clk: + for (clk_i--; clk_i >= 0; clk_i--) + clk_put(ehci_mv->clk[clk_i]); + platform_set_drvdata(pdev, NULL); + kfree(ehci_mv); +err_put_hcd: + usb_put_hcd(hcd); + + return retval; +} + +static int mv_ehci_remove(struct platform_device *pdev) +{ + struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev); + struct usb_hcd *hcd = ehci_mv->hcd; + int clk_i; + + if (hcd->rh_registered) + usb_remove_hcd(hcd); + + if (ehci_mv->otg) { + otg_set_host(ehci_mv->otg, NULL); + otg_put_transceiver(ehci_mv->otg); + } + + if (ehci_mv->mode == MV_USB_MODE_HOST) { + if (ehci_mv->pdata->set_vbus) + ehci_mv->pdata->set_vbus(0); + + mv_ehci_disable(ehci_mv); + } + + iounmap(ehci_mv->cap_regs); + iounmap(ehci_mv->phy_regs); + + for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++) + clk_put(ehci_mv->clk[clk_i]); + + platform_set_drvdata(pdev, NULL); + + kfree(ehci_mv); + usb_put_hcd(hcd); + + return 0; +} + +MODULE_ALIAS("mv-ehci"); + +static const struct platform_device_id ehci_id_table[] = { + {"pxa-u2oehci", PXA_U2OEHCI}, + {"pxa-sph", PXA_SPH}, + {"mmp3-hsic", MMP3_HSIC}, + {"mmp3-fsic", MMP3_FSIC}, + {}, +}; + +static void mv_ehci_shutdown(struct platform_device *pdev) +{ + struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev); + struct usb_hcd *hcd = ehci_mv->hcd; + + if (!hcd->rh_registered) + return; + + if (hcd->driver->shutdown) + hcd->driver->shutdown(hcd); +} + +static struct platform_driver ehci_mv_driver = { + .probe = mv_ehci_probe, + .remove = mv_ehci_remove, + .shutdown = mv_ehci_shutdown, + .driver = { + .name = "mv-ehci", + .bus = &platform_bus_type, + }, + .id_table = ehci_id_table, +}; |