^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) * SuperH EHCI host controller driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010 Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Based on ohci-sh.c and ehci-atmel.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct ehci_sh_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct clk *iclk, *fclk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct usb_hcd *hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int ehci_sh_reset(struct usb_hcd *hcd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct ehci_hcd *ehci = hcd_to_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) ehci->caps = hcd->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) return ehci_setup(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const struct hc_driver ehci_sh_hc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) .description = hcd_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .product_desc = "SuperH EHCI",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .hcd_priv_size = sizeof(struct ehci_hcd),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * generic hardware linkage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .irq = ehci_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * basic lifecycle operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .reset = ehci_sh_reset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .start = ehci_run,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .stop = ehci_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .shutdown = ehci_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * managing i/o requests and associated device resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .urb_enqueue = ehci_urb_enqueue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .urb_dequeue = ehci_urb_dequeue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .endpoint_disable = ehci_endpoint_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .endpoint_reset = ehci_endpoint_reset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * scheduling support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .get_frame_number = ehci_get_frame,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * root hub support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .hub_status_data = ehci_hub_status_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .hub_control = ehci_hub_control,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .bus_suspend = ehci_bus_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .bus_resume = ehci_bus_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .relinquish_port = ehci_relinquish_port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .port_handed_over = ehci_port_handed_over,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
^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) static int ehci_hcd_sh_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct ehci_sh_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct usb_hcd *hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int irq, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (usb_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (irq <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) goto fail_create_hcd;
^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) /* initialize hcd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_name(&pdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (!hcd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) goto fail_create_hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) hcd->regs = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (IS_ERR(hcd->regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ret = PTR_ERR(hcd->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) goto fail_request_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) hcd->rsrc_start = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) hcd->rsrc_len = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (!priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) goto fail_request_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* These are optional, we don't care if they fail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (IS_ERR(priv->fclk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) priv->fclk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (IS_ERR(priv->iclk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) priv->iclk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) clk_enable(priv->fclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) clk_enable(priv->iclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (ret != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) dev_err(&pdev->dev, "Failed to add hcd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) goto fail_add_hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) device_wakeup_enable(hcd->self.controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) priv->hcd = hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) platform_set_drvdata(pdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) fail_add_hcd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) clk_disable(priv->iclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) clk_disable(priv->fclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) fail_request_resource:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) fail_create_hcd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static int ehci_hcd_sh_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct usb_hcd *hcd = priv->hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) usb_remove_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) clk_disable(priv->fclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) clk_disable(priv->iclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct usb_hcd *hcd = priv->hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (hcd->driver->shutdown)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) hcd->driver->shutdown(hcd);
^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) static struct platform_driver ehci_hcd_sh_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) .probe = ehci_hcd_sh_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .remove = ehci_hcd_sh_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .shutdown = ehci_hcd_sh_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .name = "sh_ehci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) MODULE_ALIAS("platform:sh_ehci");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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