91 lines
1.8 KiB
C
91 lines
1.8 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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/* interface and function clocks; sometimes also an AHB clock */
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static struct clk *iclk, *fclk;
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static void atmel_start_clock(void)
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{
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clk_enable(iclk);
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clk_enable(fclk);
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}
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static void atmel_stop_clock(void)
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{
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clk_disable(fclk);
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clk_disable(iclk);
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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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struct ehci_data data;
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iclk = clk_get(dev, "ehci_clk");
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if (IS_ERR(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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fclk = clk_get(dev, "uhpck");
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if (IS_ERR(fclk)) {
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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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atmel_start_clock();
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data.flags = 0;
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data.hccr = dev_request_mem_region(dev, 0);
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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();
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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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