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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
180 lines
3.6 KiB
C
180 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2012 Sughosh Ganu <urwithsughosh@gmail.com>
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <clk.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <dm/devres.h>
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#include <dm/ofnode.h>
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#include <generic-phy.h>
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#include <reset.h>
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#include "ohci.h"
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#include <asm/arch/da8xx-usb.h>
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struct da8xx_ohci {
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ohci_t ohci;
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struct clk *clocks; /* clock list */
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struct phy phy;
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int clock_count; /* number of clock in clock list */
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};
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static int usb_phy_on(void)
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{
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unsigned long timeout;
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clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
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(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN |
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CFGCHIP2_OTGPWRDN | CFGCHIP2_OTGMODE |
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CFGCHIP2_REFFREQ | CFGCHIP2_USB1PHYCLKMUX),
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(CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN |
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CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ |
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CFGCHIP2_USB2PHYCLKMUX | CFGCHIP2_USB1SUSPENDM));
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/* wait until the usb phy pll locks */
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timeout = get_timer(0);
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while (get_timer(timeout) < 10) {
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if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
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return 1;
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}
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/* USB phy was not turned on */
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return 0;
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}
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static void usb_phy_off(void)
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{
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/* Power down the on-chip PHY. */
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clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
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CFGCHIP2_PHY_PLLON | CFGCHIP2_USB1SUSPENDM,
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CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
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CFGCHIP2_RESET);
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}
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int usb_cpu_init(void)
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{
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/* enable psc for usb2.0 */
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lpsc_on(DAVINCI_LPSC_USB20);
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/* enable psc for usb1.0 */
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lpsc_on(DAVINCI_LPSC_USB11);
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/* start the on-chip usb phy and its pll */
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if (usb_phy_on())
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return 0;
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return 1;
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}
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int usb_cpu_stop(void)
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{
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usb_phy_off();
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/* turn off the usb clock and assert the module reset */
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lpsc_disable(DAVINCI_LPSC_USB11);
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lpsc_disable(DAVINCI_LPSC_USB20);
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return 0;
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}
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int usb_cpu_init_fail(void)
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{
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return usb_cpu_stop();
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}
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#if CONFIG_IS_ENABLED(DM_USB)
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static int ohci_da8xx_probe(struct udevice *dev)
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{
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struct ohci_regs *regs = dev_read_addr_ptr(dev);
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struct da8xx_ohci *priv = dev_get_priv(dev);
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int i, err, ret, clock_nb;
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err = 0;
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priv->clock_count = 0;
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clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells",
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0);
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if (clock_nb < 0)
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return clock_nb;
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if (clock_nb > 0) {
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priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
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GFP_KERNEL);
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if (!priv->clocks)
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return -ENOMEM;
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for (i = 0; i < clock_nb; i++) {
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err = clk_get_by_index(dev, i, &priv->clocks[i]);
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if (err < 0)
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break;
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err = clk_enable(&priv->clocks[i]);
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if (err) {
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dev_err(dev, "failed to enable clock %d\n", i);
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clk_free(&priv->clocks[i]);
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goto clk_err;
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}
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priv->clock_count++;
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}
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}
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err = usb_cpu_init();
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if (err)
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goto clk_err;
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err = ohci_register(dev, regs);
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if (err)
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goto phy_err;
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return 0;
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phy_err:
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ret = usb_cpu_stop();
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if (ret)
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dev_err(dev, "failed to shutdown usb phy\n");
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clk_err:
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ret = clk_release_all(priv->clocks, priv->clock_count);
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if (ret)
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dev_err(dev, "failed to disable all clocks\n");
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return err;
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}
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static int ohci_da8xx_remove(struct udevice *dev)
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{
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struct da8xx_ohci *priv = dev_get_priv(dev);
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int ret;
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ret = ohci_deregister(dev);
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if (ret)
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return ret;
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ret = usb_cpu_stop();
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if (ret)
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return ret;
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return clk_release_all(priv->clocks, priv->clock_count);
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}
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static const struct udevice_id da8xx_ohci_ids[] = {
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{ .compatible = "ti,da830-ohci" },
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{ }
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};
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U_BOOT_DRIVER(ohci_generic) = {
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.name = "ohci-da8xx",
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.id = UCLASS_USB,
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.of_match = da8xx_ohci_ids,
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.probe = ohci_da8xx_probe,
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.remove = ohci_da8xx_remove,
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.ops = &ohci_usb_ops,
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.priv_auto = sizeof(struct da8xx_ohci),
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.flags = DM_FLAG_ALLOC_PRIV_DMA | DM_FLAG_OS_PREPARE,
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};
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#endif
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