usb/host/ehci-tegra.c

3  * EHCI-compliant USB host controller driver for NVIDIA Tegra SoCs
29 #include "ehci.h"
35 #define DRIVER_DESC "Tegra EHCI driver"
36 #define DRV_NAME "tegra-ehci"
104 	struct ehci_hcd	*ehci,  in tegra_ehci_internal_port_reset()  argument
114 	spin_lock_irqsave(&ehci->lock, flags);  in tegra_ehci_internal_port_reset()
115 	saved_usbintr = ehci_readl(ehci, &ehci->regs->intr_enable);  in tegra_ehci_internal_port_reset()
117 	ehci_writel(ehci, 0, &ehci->regs->intr_enable);  in tegra_ehci_internal_port_reset()
118 	spin_unlock_irqrestore(&ehci->lock, flags);  in tegra_ehci_internal_port_reset()
125 		temp = ehci_readl(ehci, portsc_reg);  in tegra_ehci_internal_port_reset()
127 		ehci_writel(ehci, temp, portsc_reg);  in tegra_ehci_internal_port_reset()
130 		ehci_writel(ehci, temp, portsc_reg);  in tegra_ehci_internal_port_reset()
141 			temp = ehci_readl(ehci, portsc_reg);  in tegra_ehci_internal_port_reset()
154 		ehci_writel(ehci, PORT_CSC, portsc_reg);  in tegra_ehci_internal_port_reset()
160 	temp = ehci_readl(ehci, &ehci->regs->status);  in tegra_ehci_internal_port_reset()
161 	ehci_writel(ehci, temp, &ehci->regs->status);  in tegra_ehci_internal_port_reset()
164 	ehci_writel(ehci, saved_usbintr, &ehci->regs->intr_enable);  in tegra_ehci_internal_port_reset()
177 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);  in tegra_ehci_hub_control()  local
178 	struct tegra_ehci_hcd *tegra = (struct tegra_ehci_hcd *)ehci->priv;  in tegra_ehci_hub_control()
184 	status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];  in tegra_ehci_hub_control()
186 	spin_lock_irqsave(&ehci->lock, flags);  in tegra_ehci_hub_control()
189 		temp = ehci_readl(ehci, status_reg);  in tegra_ehci_hub_control()
198 		temp = ehci_readl(ehci, status_reg);  in tegra_ehci_hub_control()
206 		ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);  in tegra_ehci_hub_control()
212 		if (ehci_handshake(ehci, status_reg, PORT_SUSPEND,  in tegra_ehci_hub_control()
216 		set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);  in tegra_ehci_hub_control()
223 		spin_unlock_irqrestore(&ehci->lock, flags);  in tegra_ehci_hub_control()
224 		return tegra_ehci_internal_port_reset(ehci, status_reg);  in tegra_ehci_hub_control()
230 	 * is different from EHCI where the host controller driver is required  in tegra_ehci_hub_control()
236 		temp = ehci_readl(ehci, status_reg);  in tegra_ehci_hub_control()
248 		ehci->reset_done[wIndex-1] = jiffies + msecs_to_jiffies(25);  in tegra_ehci_hub_control()
252 		ehci_writel(ehci, temp | PORT_RESUME, status_reg);  in tegra_ehci_hub_control()
253 		set_bit(wIndex-1, &ehci->resuming_ports);  in tegra_ehci_hub_control()
255 		spin_unlock_irqrestore(&ehci->lock, flags);  in tegra_ehci_hub_control()
257 		spin_lock_irqsave(&ehci->lock, flags);  in tegra_ehci_hub_control()
260 		if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 2000))  in tegra_ehci_hub_control()
262 		if (ehci_handshake(ehci, status_reg, PORT_SUSPEND, 0, 2000))  in tegra_ehci_hub_control()
265 		ehci->reset_done[wIndex-1] = 0;  in tegra_ehci_hub_control()
266 		clear_bit(wIndex-1, &ehci->resuming_ports);  in tegra_ehci_hub_control()
272 	spin_unlock_irqrestore(&ehci->lock, flags);  in tegra_ehci_hub_control()
278 	spin_unlock_irqrestore(&ehci->lock, flags);  in tegra_ehci_hub_control()
376 	{ .compatible = "nvidia,tegra30-ehci", .data = &tegra30_soc_config },
377 	{ .compatible = "nvidia,tegra20-ehci", .data = &tegra20_soc_config },
387 	struct ehci_hcd *ehci;  in tegra_ehci_probe()  local
415 	ehci = hcd_to_ehci(hcd);  in tegra_ehci_probe()
416 	tegra = (struct tegra_ehci_hcd *)ehci->priv;  in tegra_ehci_probe()
422 		dev_err(&pdev->dev, "Can't get ehci clock\n");  in tegra_ehci_probe()
429 		dev_err(&pdev->dev, "Can't get ehci reset\n");  in tegra_ehci_probe()
464 	ehci->caps = hcd->regs + 0x100;  in tegra_ehci_probe()
465 	ehci->has_hostpc = soc_config->has_hostpc;  in tegra_ehci_probe()
544 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);  in tegra_ehci_reset()  local
558 	txfifothresh = ehci->has_hostpc ? 0x10 : 10;  in tegra_ehci_reset()
559 	ehci_writel(ehci, txfifothresh << 16, &ehci->regs->txfill_tuning);  in tegra_ehci_reset()