1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/dma-mapping.h>
15 #include "ehci.h"
17 #define hcd_to_ehci_priv(h) ((struct brcm_priv *)hcd_to_ehci(h)->priv)
27 static inline void ehci_brcm_wait_for_sof(struct ehci_hcd *ehci, u32 delay)  in ehci_brcm_wait_for_sof()  argument
29 	u32 frame_idx = ehci_readl(ehci, &ehci->regs->frame_index);  in ehci_brcm_wait_for_sof()
34 	res = readl_relaxed_poll_timeout(&ehci->regs->frame_index, val,  in ehci_brcm_wait_for_sof()
37 		ehci_err(ehci, "Error waiting for SOF\n");  in ehci_brcm_wait_for_sof()
43  * The EHCI controller has a bug where it can violate the SOF
48  * The fix is to Intercept the echi-hcd request to complete RESUME and
50  * See SWLINUX-1909 for more details
60 	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);  in ehci_brcm_hub_control()  local
61 	int		ports = HCS_N_PORTS(ehci->hcs_params);  in ehci_brcm_hub_control()
66 	status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];  in ehci_brcm_hub_control()
74 	    ehci->reset_done[wIndex-1] &&  in ehci_brcm_hub_control()
75 	    time_after_eq(jiffies, ehci->reset_done[wIndex-1]) &&  in ehci_brcm_hub_control()
76 	    (ehci_readl(ehci, status_reg) & PORT_RESUME)) {  in ehci_brcm_hub_control()
82 		ehci_dbg(ehci, "SOF alignment workaround\n");  in ehci_brcm_hub_control()
85 		ehci_brcm_wait_for_sof(ehci, 5);  in ehci_brcm_hub_control()
95 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);  in ehci_brcm_reset()  local
98 	ehci->big_endian_mmio = 1;  in ehci_brcm_reset()
100 	ehci->caps = (void __iomem *)hcd->regs;  in ehci_brcm_reset()
101 	len = HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));  in ehci_brcm_reset()
102 	ehci->regs = (void __iomem *)(hcd->regs + len);  in ehci_brcm_reset()
105 	ehci_writel(ehci, CMD_RESET, &ehci->regs->command);  in ehci_brcm_reset()
109 	 * SWLINUX-1705: Avoid OUT packet underflows during high memory  in ehci_brcm_reset()
111 	 * port_status[0x0f] = Broadcom-proprietary USB_EHCI_INSNREG00 @ 0x90  in ehci_brcm_reset()
113 	ehci_writel(ehci, 0x00800040, &ehci->regs->port_status[0x10]);  in ehci_brcm_reset()
114 	ehci_writel(ehci, 0x00000001, &ehci->regs->port_status[0x12]);  in ehci_brcm_reset()
128 	struct device *dev = &pdev->dev;  in ehci_brcm_probe()
141 		return irq ? irq : -EINVAL;  in ehci_brcm_probe()
149 		return -ENOMEM;  in ehci_brcm_probe()
154 	priv->clk = devm_clk_get_optional(dev, NULL);  in ehci_brcm_probe()
155 	if (IS_ERR(priv->clk)) {  in ehci_brcm_probe()
156 		err = PTR_ERR(priv->clk);  in ehci_brcm_probe()
160 	err = clk_prepare_enable(priv->clk);  in ehci_brcm_probe()
164 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res_mem);  in ehci_brcm_probe()
165 	if (IS_ERR(hcd->regs)) {  in ehci_brcm_probe()
166 		err = PTR_ERR(hcd->regs);  in ehci_brcm_probe()
169 	hcd->rsrc_start = res_mem->start;  in ehci_brcm_probe()
170 	hcd->rsrc_len = resource_size(res_mem);  in ehci_brcm_probe()
175 	device_wakeup_enable(hcd->self.controller);  in ehci_brcm_probe()
176 	device_enable_async_suspend(hcd->self.controller);  in ehci_brcm_probe()
181 	clk_disable_unprepare(priv->clk);  in ehci_brcm_probe()
194 	clk_disable_unprepare(priv->clk);  in ehci_brcm_remove()
209 	clk_disable_unprepare(priv->clk);  in ehci_brcm_suspend()
216 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);  in ehci_brcm_resume()  local
220 	err = clk_prepare_enable(priv->clk);  in ehci_brcm_resume()
224 	 * SWLINUX-1705: Avoid OUT packet underflows during high memory  in ehci_brcm_resume()
226 	 * port_status[0x0f] = Broadcom-proprietary USB_EHCI_INSNREG00  in ehci_brcm_resume()
229 	ehci_writel(ehci, 0x00800040, &ehci->regs->port_status[0x10]);  in ehci_brcm_resume()
230 	ehci_writel(ehci, 0x00000001, &ehci->regs->port_status[0x12]);  in ehci_brcm_resume()
245 	{ .compatible = "brcm,ehci-brcm-v2", },
246 	{ .compatible = "brcm,bcm7445-ehci", },
255 		.name	= "ehci-brcm",
264 		return -ENODEV;  in ehci_brcm_init()
277 MODULE_ALIAS("platform:ehci-brcm");
278 MODULE_DESCRIPTION("EHCI Broadcom STB driver");