118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/*
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* (C) Copyright 2010 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <driver.h>
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#include <init.h>
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#include <usb/usb.h>
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#include <usb/usb_defs.h>
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#include <usb/ehci.h>
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#include <errno.h>
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#include <io.h>
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#include "ehci.h"
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struct atmel_ehci_priv {
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struct device_d *dev;
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struct clk *iclk;
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struct clk *uclk;
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};
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static int atmel_start_clock(struct atmel_ehci_priv *atehci)
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{
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int ret;
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ret = clk_enable(atehci->iclk);
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if (ret < 0) {
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dev_err(atehci->dev,
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"Error enabling interface clock\n");
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return ret;
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}
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ret = clk_enable(atehci->uclk);
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if (ret < 0)
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dev_err(atehci->dev,
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"Error enabling function clock\n");
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return ret;
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}
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static void atmel_stop_clock(struct atmel_ehci_priv *atehci)
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{
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clk_disable(atehci->iclk);
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clk_disable(atehci->uclk);
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}
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static int atmel_ehci_probe(struct device_d *dev)
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{
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int ret;
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struct resource *iores;
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struct ehci_data data;
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struct atmel_ehci_priv *atehci;
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atehci = xzalloc(sizeof(*atehci));
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atehci->dev = dev;
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dev->priv = atehci;
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atehci->iclk = clk_get(dev, "ehci_clk");
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if (IS_ERR(atehci->iclk)) {
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dev_err(dev, "Error getting interface clock\n");
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return -ENOENT;
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}
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atehci->uclk = clk_get(dev, "uhpck");
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if (IS_ERR(atehci->iclk)) {
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dev_err(dev, "Error getting function clock\n");
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return -ENOENT;
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}
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/*
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* Start the USB clocks.
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*/
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ret = atmel_start_clock(atehci);
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if (ret < 0)
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return ret;
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data.flags = 0;
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iores = dev_request_mem_resource(dev, 0);
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if (IS_ERR(iores))
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return PTR_ERR(iores);
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data.hccr = IOMEM(iores->start);
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ehci_register(dev, &data);
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return 0;
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}
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static void atmel_ehci_remove(struct device_d *dev)
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{
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/*
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* Stop the USB clocks.
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*/
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atmel_stop_clock(dev->priv);
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}
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static struct driver_d atmel_ehci_driver = {
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.name = "atmel-ehci",
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.probe = atmel_ehci_probe,
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.remove = atmel_ehci_remove,
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};
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device_platform_driver(atmel_ehci_driver);
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