usb: ohci-at91: Convert global variables to private data
Store driver data in per-device private variable as opposed to storing it in global vairables. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -27,66 +27,81 @@
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#include "ohci.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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struct ohci_at91_priv {
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struct device_d *dev;
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struct clk *iclk;
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struct clk *fclk;
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struct ohci_regs __iomem *regs;
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};
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static void at91_start_clock(void)
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static void at91_start_clock(struct ohci_at91_priv *ohci_at91)
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{
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clk_enable(iclk);
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clk_enable(fclk);
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clk_enable(ohci_at91->iclk);
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clk_enable(ohci_at91->fclk);
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}
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static void at91_stop_clock(void)
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static void at91_stop_clock(struct ohci_at91_priv *ohci_at91)
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{
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clk_disable(fclk);
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clk_disable(iclk);
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clk_disable(ohci_at91->fclk);
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clk_disable(ohci_at91->iclk);
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}
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static int at91_ohci_probe(struct device_d *dev)
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{
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struct ohci_regs __iomem *regs = (struct ohci_regs __iomem *)dev->resource[0].start;
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struct resource *io;
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struct ohci_at91_priv *ohci_at91 = xzalloc(sizeof(*ohci_at91));
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iclk = clk_get(NULL, "ohci_clk");
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if (IS_ERR(iclk)) {
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dev->priv = ohci_at91;
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ohci_at91->dev = dev;
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io = dev_get_resource(dev, IORESOURCE_MEM, 0);
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if (IS_ERR(io)) {
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dev_err(dev, "Failed to get IORESOURCE_MEM\n");
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return PTR_ERR(io);
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}
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ohci_at91->regs = IOMEM(io->start);
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ohci_at91->iclk = clk_get(NULL, "ohci_clk");
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if (IS_ERR(ohci_at91->iclk)) {
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dev_err(dev, "Failed to get 'ohci_clk'\n");
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return PTR_ERR(iclk);
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return PTR_ERR(ohci_at91->iclk);
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}
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fclk = clk_get(NULL, "uhpck");
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if (IS_ERR(fclk)) {
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ohci_at91->fclk = clk_get(NULL, "uhpck");
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if (IS_ERR(ohci_at91->fclk)) {
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dev_err(dev, "Failed to get 'uhpck'\n");
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return PTR_ERR(fclk);
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return PTR_ERR(ohci_at91->fclk);
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}
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/*
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* Start the USB clocks.
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*/
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at91_start_clock();
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at91_start_clock(ohci_at91);
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/*
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* The USB host controller must remain in reset.
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*/
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writel(0, ®s->control);
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writel(0, &ohci_at91->regs->control);
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add_generic_device("ohci", DEVICE_ID_DYNAMIC, NULL, dev->resource[0].start,
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resource_size(&dev->resource[0]), IORESOURCE_MEM, NULL);
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add_generic_device("ohci", DEVICE_ID_DYNAMIC, NULL, io->start,
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resource_size(io), IORESOURCE_MEM, NULL);
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return 0;
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}
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static void at91_ohci_remove(struct device_d *dev)
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{
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struct ohci_regs __iomem *regs = (struct ohci_regs __iomem *)dev->resource[0].start;
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struct ohci_at91_priv *ohci_at91 = dev->priv;
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/*
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* Put the USB host controller into reset.
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*/
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writel(0, ®s->control);
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writel(0, &ohci_at91->regs->control);
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/*
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* Stop the USB clocks.
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*/
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at91_stop_clock();
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at91_stop_clock(ohci_at91);
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}
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static struct driver_d at91_ohci_driver = {
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