^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for EHCI HCD on SPEAr SOC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010 ST Micro Electronics,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Deepak Sikri <deepak.sikri@st.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Based on various ehci-*.c drivers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/usb/hcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "ehci.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define DRIVER_DESC "EHCI SPEAr driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static const char hcd_name[] = "SPEAr-ehci";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct spear_ehci {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define to_spear_ehci(hcd) (struct spear_ehci *)(hcd_to_ehci(hcd)->priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static struct hc_driver __read_mostly ehci_spear_hc_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int __maybe_unused ehci_spear_drv_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct usb_hcd *hcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) bool do_wakeup = device_may_wakeup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return ehci_suspend(hcd, do_wakeup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int __maybe_unused ehci_spear_drv_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct usb_hcd *hcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ehci_resume(hcd, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static SIMPLE_DEV_PM_OPS(ehci_spear_pm_ops, ehci_spear_drv_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ehci_spear_drv_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct usb_hcd *hcd ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct spear_ehci *sehci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct clk *usbh_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) const struct hc_driver *driver = &ehci_spear_hc_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int irq, retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (usb_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (irq < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) retval = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * Right now device-tree probed devices don't get dma_mask set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * Since shared usb code relies on it, set it here for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * Once we have dma capability bindings this can go away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) usbh_clk = devm_clk_get(&pdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (IS_ERR(usbh_clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dev_err(&pdev->dev, "Error getting interface clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) retval = PTR_ERR(usbh_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (!hcd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) hcd->regs = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (IS_ERR(hcd->regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) retval = PTR_ERR(hcd->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) goto err_put_hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) hcd->rsrc_start = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) hcd->rsrc_len = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) sehci = to_spear_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) sehci->clk = usbh_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* registers start at offset 0x0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) hcd_to_ehci(hcd)->caps = hcd->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) clk_prepare_enable(sehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) goto err_stop_ehci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) device_wakeup_enable(hcd->self.controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) err_stop_ehci:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) clk_disable_unprepare(sehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) err_put_hcd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) dev_err(&pdev->dev, "init fail, %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return retval ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int spear_ehci_hcd_drv_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct usb_hcd *hcd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct spear_ehci *sehci = to_spear_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) usb_remove_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (sehci->clk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) clk_disable_unprepare(sehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static const struct of_device_id spear_ehci_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) { .compatible = "st,spear600-ehci", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) MODULE_DEVICE_TABLE(of, spear_ehci_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static struct platform_driver spear_ehci_hcd_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) .probe = spear_ehci_hcd_drv_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .remove = spear_ehci_hcd_drv_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .shutdown = usb_hcd_platform_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .name = "spear-ehci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .bus = &platform_bus_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .pm = pm_ptr(&ehci_spear_pm_ops),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .of_match_table = spear_ehci_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static const struct ehci_driver_overrides spear_overrides __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) .extra_priv_size = sizeof(struct spear_ehci),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int __init ehci_spear_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (usb_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) pr_info("%s: " DRIVER_DESC "\n", hcd_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) ehci_init_driver(&ehci_spear_hc_driver, &spear_overrides);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return platform_driver_register(&spear_ehci_hcd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) module_init(ehci_spear_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static void __exit ehci_spear_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) platform_driver_unregister(&spear_ehci_hcd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) module_exit(ehci_spear_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) MODULE_ALIAS("platform:spear-ehci");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) MODULE_AUTHOR("Deepak Sikri");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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