Orange Pi5 kernel

^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)  * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/platform_device.h>
^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/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/usb/otg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/usb/ulpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/usb/hcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/platform_data/usb-ehci-mxc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "ehci.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define DRIVER_DESC "Freescale On-Chip EHCI Host driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static const char hcd_name[] = "ehci-mxc";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define ULPI_VIEWPORT_OFFSET	0x170
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) struct ehci_mxc_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	struct clk *usbclk, *ahbclk, *phyclk;
^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) static struct hc_driver __read_mostly ehci_mxc_hc_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static const struct ehci_driver_overrides ehci_mxc_overrides __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	.extra_priv_size =	sizeof(struct ehci_mxc_priv),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static int ehci_mxc_drv_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct mxc_usbh_platform_data *pdata = dev_get_platdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct usb_hcd *hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	int irq, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct ehci_mxc_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct ehci_hcd *ehci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		dev_err(dev, "No platform data given, bailing out.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (!hcd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	hcd->regs = devm_ioremap_resource(dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if (IS_ERR(hcd->regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		ret = PTR_ERR(hcd->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		goto err_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	hcd->rsrc_start = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	hcd->rsrc_len = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	hcd->has_tt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	ehci = hcd_to_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	priv = (struct ehci_mxc_priv *) ehci->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	/* enable clocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	priv->usbclk = devm_clk_get(dev, "ipg");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (IS_ERR(priv->usbclk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		ret = PTR_ERR(priv->usbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		goto err_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	clk_prepare_enable(priv->usbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	priv->ahbclk = devm_clk_get(dev, "ahb");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (IS_ERR(priv->ahbclk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		ret = PTR_ERR(priv->ahbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		goto err_clk_ahb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	clk_prepare_enable(priv->ahbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	/* "dr" device has its own clock on i.MX51 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	priv->phyclk = devm_clk_get(dev, "phy");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (IS_ERR(priv->phyclk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		priv->phyclk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (priv->phyclk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		clk_prepare_enable(priv->phyclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	/* call platform specific init function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (pdata->init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		ret = pdata->init(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			dev_err(dev, "platform init failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			goto err_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		/* platforms need some time to settle changed IO settings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		mdelay(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	/* EHCI registers start at offset 0x100 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ehci->caps = hcd->regs + 0x100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	ehci->regs = hcd->regs + 0x100 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	/* set up the PORTSCx register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	/* is this really needed? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	msleep(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	/* Initialize the transceiver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (pdata->otg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		ret = usb_phy_init(pdata->otg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			dev_err(dev, "unable to init transceiver, probably missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			goto err_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		ret = otg_set_vbus(pdata->otg->otg, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			dev_err(dev, "unable to enable vbus on transceiver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			goto err_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	platform_set_drvdata(pdev, hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		goto err_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	device_wakeup_enable(hcd->self.controller);
^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) err_add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (pdata && pdata->exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		pdata->exit(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) err_init:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (priv->phyclk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		clk_disable_unprepare(priv->phyclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	clk_disable_unprepare(priv->ahbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) err_clk_ahb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	clk_disable_unprepare(priv->usbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) err_alloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static int ehci_mxc_drv_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct mxc_usbh_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct usb_hcd *hcd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct ehci_mxc_priv *priv = (struct ehci_mxc_priv *) ehci->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	usb_remove_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	if (pdata && pdata->exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		pdata->exit(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (pdata && pdata->otg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		usb_phy_shutdown(pdata->otg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	clk_disable_unprepare(priv->usbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	clk_disable_unprepare(priv->ahbclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	if (priv->phyclk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		clk_disable_unprepare(priv->phyclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	return 0;
^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:mxc-ehci");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static struct platform_driver ehci_mxc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	.probe = ehci_mxc_drv_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	.remove = ehci_mxc_drv_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	.shutdown = usb_hcd_platform_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		   .name = "mxc-ehci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static int __init ehci_mxc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (usb_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	ehci_init_driver(&ehci_mxc_hc_driver, &ehci_mxc_overrides);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return platform_driver_register(&ehci_mxc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) module_init(ehci_mxc_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static void __exit ehci_mxc_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	platform_driver_unregister(&ehci_mxc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) module_exit(ehci_mxc_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) MODULE_AUTHOR("Sascha Hauer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) MODULE_LICENSE("GPL");