^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) * OHCI HCD (Host Controller Driver) for USB.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010 ST Microelectronics.
^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 ohci-*.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/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/usb/hcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "ohci.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DRIVER_DESC "OHCI SPEAr driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const char hcd_name[] = "SPEAr-ohci";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct spear_ohci {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define to_spear_ohci(hcd) (struct spear_ohci *)(hcd_to_ohci(hcd)->priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static struct hc_driver __read_mostly ohci_spear_hc_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) const struct hc_driver *driver = &ohci_spear_hc_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct usb_hcd *hcd = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct clk *usbh_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct spear_ohci *sohci_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int retval, irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (irq < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) retval = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * Right now device-tree probed devices don't get dma_mask set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Since shared usb code relies on it, set it here for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * Once we have dma capability bindings this can go away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) usbh_clk = devm_clk_get(&pdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (IS_ERR(usbh_clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) dev_err(&pdev->dev, "Error getting interface clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) retval = PTR_ERR(usbh_clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (!hcd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) hcd->regs = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (IS_ERR(hcd->regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) retval = PTR_ERR(hcd->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) goto err_put_hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) hcd->rsrc_start = pdev->resource[0].start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) hcd->rsrc_len = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) sohci_p = to_spear_ohci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) sohci_p->clk = usbh_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) clk_prepare_enable(sohci_p->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (retval == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) device_wakeup_enable(hcd->self.controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) clk_disable_unprepare(sohci_p->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) err_put_hcd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) dev_err(&pdev->dev, "init fail, %d\n", retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct usb_hcd *hcd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct spear_ohci *sohci_p = to_spear_ohci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) usb_remove_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (sohci_p->clk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) clk_disable_unprepare(sohci_p->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #if defined(CONFIG_PM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int spear_ohci_hcd_drv_suspend(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) pm_message_t message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct usb_hcd *hcd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct ohci_hcd *ohci = hcd_to_ohci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct spear_ohci *sohci_p = to_spear_ohci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) bool do_wakeup = device_may_wakeup(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (time_before(jiffies, ohci->next_statechange))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) msleep(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ohci->next_statechange = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) ret = ohci_suspend(hcd, do_wakeup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) clk_disable_unprepare(sohci_p->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct usb_hcd *hcd = platform_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct ohci_hcd *ohci = hcd_to_ohci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct spear_ohci *sohci_p = to_spear_ohci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (time_before(jiffies, ohci->next_statechange))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) msleep(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ohci->next_statechange = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) clk_prepare_enable(sohci_p->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ohci_resume(hcd, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static const struct of_device_id spear_ohci_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) { .compatible = "st,spear600-ohci", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) MODULE_DEVICE_TABLE(of, spear_ohci_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* Driver definition to register with the platform bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static struct platform_driver spear_ohci_hcd_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) .probe = spear_ohci_hcd_drv_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .remove = spear_ohci_hcd_drv_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .suspend = spear_ohci_hcd_drv_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .resume = spear_ohci_hcd_drv_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .name = "spear-ohci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) .of_match_table = spear_ohci_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static const struct ohci_driver_overrides spear_overrides __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .extra_priv_size = sizeof(struct spear_ohci),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static int __init ohci_spear_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (usb_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) pr_info("%s: " DRIVER_DESC "\n", hcd_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ohci_init_driver(&ohci_spear_hc_driver, &spear_overrides);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return platform_driver_register(&spear_ohci_hcd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) module_init(ohci_spear_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static void __exit ohci_spear_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) platform_driver_unregister(&spear_ohci_hcd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) module_exit(ohci_spear_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) MODULE_AUTHOR("Deepak Sikri");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) MODULE_ALIAS("platform:spear-ohci");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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