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840 lines
19 KiB
840 lines
19 KiB
// SPDX-License-Identifier: GPL-1.0+ |
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/* |
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* Renesas USB driver |
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* |
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* Copyright (C) 2011 Renesas Solutions Corp. |
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* Copyright (C) 2019 Renesas Electronics Corporation |
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* Kuninori Morimoto <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/err.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/reset.h> |
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#include <linux/slab.h> |
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#include <linux/sysfs.h> |
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#include "common.h" |
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#include "rcar2.h" |
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#include "rcar3.h" |
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#include "rza.h" |
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|
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/* |
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* image of renesas_usbhs |
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* |
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* ex) gadget case |
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* mod.c |
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* mod_gadget.c |
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* mod_host.c pipe.c fifo.c |
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* |
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* +-------+ +-----------+ |
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* | pipe0 |------>| fifo pio | |
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* +------------+ +-------+ +-----------+ |
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* | mod_gadget |=====> | pipe1 |--+ |
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* +------------+ +-------+ | +-----------+ |
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* | pipe2 | | +-| fifo dma0 | |
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* +------------+ +-------+ | | +-----------+ |
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* | mod_host | | pipe3 |<-|--+ |
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* +------------+ +-------+ | +-----------+ |
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* | .... | +--->| fifo dma1 | |
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* | .... | +-----------+ |
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*/ |
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|
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/* |
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* platform call back |
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* |
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* renesas usb support platform callback function. |
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* Below macro call it. |
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* if platform doesn't have callback, it return 0 (no error) |
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*/ |
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#define usbhs_platform_call(priv, func, args...)\ |
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(!(priv) ? -ENODEV : \ |
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!((priv)->pfunc->func) ? 0 : \ |
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(priv)->pfunc->func(args)) |
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|
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/* |
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* common functions |
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*/ |
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u16 usbhs_read(struct usbhs_priv *priv, u32 reg) |
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{ |
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return ioread16(priv->base + reg); |
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} |
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void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) |
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{ |
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iowrite16(data, priv->base + reg); |
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} |
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void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) |
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{ |
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u16 val = usbhs_read(priv, reg); |
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val &= ~mask; |
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val |= data & mask; |
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usbhs_write(priv, reg, val); |
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} |
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struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) |
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{ |
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return dev_get_drvdata(&pdev->dev); |
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} |
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int usbhs_get_id_as_gadget(struct platform_device *pdev) |
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{ |
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return USBHS_GADGET; |
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} |
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/* |
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* syscfg functions |
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*/ |
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static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) |
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{ |
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usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); |
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} |
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void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) |
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{ |
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u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; |
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u16 val = DCFM | DRPD | HSE | USBE; |
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/* |
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* if enable |
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* |
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* - select Host mode |
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* - D+ Line/D- Line Pull-down |
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*/ |
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usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); |
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} |
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void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) |
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{ |
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u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; |
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u16 val = HSE | USBE; |
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/* CNEN bit is required for function operation */ |
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if (usbhs_get_dparam(priv, has_cnen)) { |
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mask |= CNEN; |
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val |= CNEN; |
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} |
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/* |
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* if enable |
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* |
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* - select Function mode |
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* - D+ Line Pull-up is disabled |
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* When D+ Line Pull-up is enabled, |
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* calling usbhs_sys_function_pullup(,1) |
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*/ |
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usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); |
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} |
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void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) |
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{ |
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usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); |
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} |
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void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) |
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{ |
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usbhs_write(priv, TESTMODE, mode); |
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} |
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/* |
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* frame functions |
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*/ |
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int usbhs_frame_get_num(struct usbhs_priv *priv) |
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{ |
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return usbhs_read(priv, FRMNUM) & FRNM_MASK; |
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} |
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/* |
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* usb request functions |
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*/ |
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void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) |
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{ |
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u16 val; |
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val = usbhs_read(priv, USBREQ); |
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req->bRequest = (val >> 8) & 0xFF; |
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req->bRequestType = (val >> 0) & 0xFF; |
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req->wValue = cpu_to_le16(usbhs_read(priv, USBVAL)); |
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req->wIndex = cpu_to_le16(usbhs_read(priv, USBINDX)); |
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req->wLength = cpu_to_le16(usbhs_read(priv, USBLENG)); |
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} |
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void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) |
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{ |
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usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType); |
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usbhs_write(priv, USBVAL, le16_to_cpu(req->wValue)); |
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usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex)); |
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usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength)); |
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usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); |
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} |
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/* |
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* bus/vbus functions |
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*/ |
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void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) |
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{ |
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u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT); |
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if (status != USBRST) { |
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struct device *dev = usbhs_priv_to_dev(priv); |
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dev_err(dev, "usbhs should be reset\n"); |
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} |
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usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); |
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} |
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void usbhs_bus_send_reset(struct usbhs_priv *priv) |
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{ |
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usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); |
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} |
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int usbhs_bus_get_speed(struct usbhs_priv *priv) |
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{ |
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u16 dvstctr = usbhs_read(priv, DVSTCTR); |
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switch (RHST & dvstctr) { |
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case RHST_LOW_SPEED: |
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return USB_SPEED_LOW; |
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case RHST_FULL_SPEED: |
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return USB_SPEED_FULL; |
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case RHST_HIGH_SPEED: |
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return USB_SPEED_HIGH; |
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} |
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return USB_SPEED_UNKNOWN; |
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} |
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int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) |
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{ |
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struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
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return usbhs_platform_call(priv, set_vbus, pdev, enable); |
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} |
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static void usbhsc_bus_init(struct usbhs_priv *priv) |
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{ |
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usbhs_write(priv, DVSTCTR, 0); |
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usbhs_vbus_ctrl(priv, 0); |
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} |
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/* |
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* device configuration |
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*/ |
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int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, |
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u16 upphub, u16 hubport, u16 speed) |
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{ |
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struct device *dev = usbhs_priv_to_dev(priv); |
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u16 usbspd = 0; |
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u32 reg = DEVADD0 + (2 * devnum); |
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if (devnum > 10) { |
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dev_err(dev, "cannot set speed to unknown device %d\n", devnum); |
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return -EIO; |
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} |
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if (upphub > 0xA) { |
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dev_err(dev, "unsupported hub number %d\n", upphub); |
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return -EIO; |
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} |
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switch (speed) { |
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case USB_SPEED_LOW: |
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usbspd = USBSPD_SPEED_LOW; |
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break; |
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case USB_SPEED_FULL: |
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usbspd = USBSPD_SPEED_FULL; |
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break; |
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case USB_SPEED_HIGH: |
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usbspd = USBSPD_SPEED_HIGH; |
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break; |
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default: |
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dev_err(dev, "unsupported speed %d\n", speed); |
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return -EIO; |
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} |
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usbhs_write(priv, reg, UPPHUB(upphub) | |
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HUBPORT(hubport)| |
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USBSPD(usbspd)); |
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return 0; |
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} |
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/* |
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* interrupt functions |
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*/ |
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void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit) |
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{ |
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u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0); |
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usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask); |
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} |
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/* |
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* local functions |
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*/ |
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static void usbhsc_set_buswait(struct usbhs_priv *priv) |
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{ |
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int wait = usbhs_get_dparam(priv, buswait_bwait); |
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/* set bus wait if platform have */ |
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if (wait) |
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usbhs_bset(priv, BUSWAIT, 0x000F, wait); |
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} |
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static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) |
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{ |
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return priv->dparam.multi_clks; |
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} |
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static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) |
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{ |
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if (!usbhsc_is_multi_clks(priv)) |
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return 0; |
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/* The first clock should exist */ |
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priv->clks[0] = of_clk_get(dev_of_node(dev), 0); |
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if (IS_ERR(priv->clks[0])) |
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return PTR_ERR(priv->clks[0]); |
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/* |
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* To backward compatibility with old DT, this driver checks the return |
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* value if it's -ENOENT or not. |
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*/ |
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priv->clks[1] = of_clk_get(dev_of_node(dev), 1); |
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if (PTR_ERR(priv->clks[1]) == -ENOENT) |
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priv->clks[1] = NULL; |
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else if (IS_ERR(priv->clks[1])) |
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return PTR_ERR(priv->clks[1]); |
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return 0; |
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} |
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static void usbhsc_clk_put(struct usbhs_priv *priv) |
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{ |
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int i; |
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if (!usbhsc_is_multi_clks(priv)) |
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return; |
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for (i = 0; i < ARRAY_SIZE(priv->clks); i++) |
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clk_put(priv->clks[i]); |
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} |
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static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv) |
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{ |
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int i, ret; |
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if (!usbhsc_is_multi_clks(priv)) |
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return 0; |
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for (i = 0; i < ARRAY_SIZE(priv->clks); i++) { |
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ret = clk_prepare_enable(priv->clks[i]); |
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if (ret) { |
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while (--i >= 0) |
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clk_disable_unprepare(priv->clks[i]); |
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return ret; |
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} |
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} |
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return ret; |
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} |
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static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv) |
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{ |
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int i; |
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if (!usbhsc_is_multi_clks(priv)) |
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return; |
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for (i = 0; i < ARRAY_SIZE(priv->clks); i++) |
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clk_disable_unprepare(priv->clks[i]); |
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} |
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/* |
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* platform default param |
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*/ |
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/* commonly used on old SH-Mobile SoCs */ |
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static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), |
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}; |
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/* commonly used on newer SH-Mobile and R-Car SoCs */ |
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static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), |
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RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), |
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}; |
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/* |
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* power control |
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*/ |
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static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) |
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{ |
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struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
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struct device *dev = usbhs_priv_to_dev(priv); |
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if (enable) { |
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/* enable PM */ |
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pm_runtime_get_sync(dev); |
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/* enable clks */ |
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if (usbhsc_clk_prepare_enable(priv)) |
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return; |
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/* enable platform power */ |
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usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); |
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/* USB on */ |
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usbhs_sys_clock_ctrl(priv, enable); |
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} else { |
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/* USB off */ |
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usbhs_sys_clock_ctrl(priv, enable); |
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/* disable platform power */ |
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usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); |
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/* disable clks */ |
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usbhsc_clk_disable_unprepare(priv); |
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/* disable PM */ |
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pm_runtime_put_sync(dev); |
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} |
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} |
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/* |
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* hotplug |
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*/ |
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static void usbhsc_hotplug(struct usbhs_priv *priv) |
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{ |
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struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
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struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
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int id; |
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int enable; |
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int cable; |
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int ret; |
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/* |
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* get vbus status from platform |
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*/ |
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enable = usbhs_mod_info_call(priv, get_vbus, pdev); |
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|
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/* |
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* get id from platform |
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*/ |
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id = usbhs_platform_call(priv, get_id, pdev); |
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if (enable && !mod) { |
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if (priv->edev) { |
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cable = extcon_get_state(priv->edev, EXTCON_USB_HOST); |
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if ((cable > 0 && id != USBHS_HOST) || |
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(!cable && id != USBHS_GADGET)) { |
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dev_info(&pdev->dev, |
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"USB cable plugged in doesn't match the selected role!\n"); |
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return; |
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} |
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} |
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ret = usbhs_mod_change(priv, id); |
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if (ret < 0) |
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return; |
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dev_dbg(&pdev->dev, "%s enable\n", __func__); |
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/* power on */ |
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if (usbhs_get_dparam(priv, runtime_pwctrl)) |
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usbhsc_power_ctrl(priv, enable); |
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|
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/* bus init */ |
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usbhsc_set_buswait(priv); |
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usbhsc_bus_init(priv); |
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/* module start */ |
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usbhs_mod_call(priv, start, priv); |
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|
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} else if (!enable && mod) { |
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dev_dbg(&pdev->dev, "%s disable\n", __func__); |
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/* module stop */ |
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usbhs_mod_call(priv, stop, priv); |
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|
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/* bus init */ |
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usbhsc_bus_init(priv); |
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/* power off */ |
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if (usbhs_get_dparam(priv, runtime_pwctrl)) |
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usbhsc_power_ctrl(priv, enable); |
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usbhs_mod_change(priv, -1); |
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|
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/* reset phy for next connection */ |
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usbhs_platform_call(priv, phy_reset, pdev); |
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} |
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} |
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/* |
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* notify hotplug |
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*/ |
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static void usbhsc_notify_hotplug(struct work_struct *work) |
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{ |
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struct usbhs_priv *priv = container_of(work, |
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struct usbhs_priv, |
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notify_hotplug_work.work); |
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usbhsc_hotplug(priv); |
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} |
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int usbhsc_schedule_notify_hotplug(struct platform_device *pdev) |
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{ |
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struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); |
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int delay = usbhs_get_dparam(priv, detection_delay); |
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|
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/* |
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* This functions will be called in interrupt. |
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* To make sure safety context, |
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* use workqueue for usbhs_notify_hotplug |
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*/ |
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schedule_delayed_work(&priv->notify_hotplug_work, |
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msecs_to_jiffies(delay)); |
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return 0; |
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} |
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|
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/* |
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* platform functions |
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*/ |
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static const struct of_device_id usbhs_of_match[] = { |
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{ |
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.compatible = "renesas,usbhs-r8a774c0", |
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.data = &usbhs_rcar_gen3_with_pll_plat_info, |
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}, |
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{ |
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.compatible = "renesas,usbhs-r8a7790", |
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.data = &usbhs_rcar_gen2_plat_info, |
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}, |
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{ |
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.compatible = "renesas,usbhs-r8a7791", |
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.data = &usbhs_rcar_gen2_plat_info, |
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}, |
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{ |
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.compatible = "renesas,usbhs-r8a7794", |
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.data = &usbhs_rcar_gen2_plat_info, |
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}, |
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{ |
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.compatible = "renesas,usbhs-r8a7795", |
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.data = &usbhs_rcar_gen3_plat_info, |
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}, |
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{ |
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.compatible = "renesas,usbhs-r8a7796", |
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.data = &usbhs_rcar_gen3_plat_info, |
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}, |
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{ |
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.compatible = "renesas,usbhs-r8a77990", |
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.data = &usbhs_rcar_gen3_with_pll_plat_info, |
|
}, |
|
{ |
|
.compatible = "renesas,usbhs-r8a77995", |
|
.data = &usbhs_rcar_gen3_with_pll_plat_info, |
|
}, |
|
{ |
|
.compatible = "renesas,rcar-gen2-usbhs", |
|
.data = &usbhs_rcar_gen2_plat_info, |
|
}, |
|
{ |
|
.compatible = "renesas,rcar-gen3-usbhs", |
|
.data = &usbhs_rcar_gen3_plat_info, |
|
}, |
|
{ |
|
.compatible = "renesas,rza1-usbhs", |
|
.data = &usbhs_rza1_plat_info, |
|
}, |
|
{ |
|
.compatible = "renesas,rza2-usbhs", |
|
.data = &usbhs_rza2_plat_info, |
|
}, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, usbhs_of_match); |
|
|
|
static int usbhs_probe(struct platform_device *pdev) |
|
{ |
|
const struct renesas_usbhs_platform_info *info; |
|
struct usbhs_priv *priv; |
|
struct resource *irq_res; |
|
struct device *dev = &pdev->dev; |
|
struct gpio_desc *gpiod; |
|
int ret; |
|
u32 tmp; |
|
|
|
/* check device node */ |
|
if (dev_of_node(dev)) |
|
info = of_device_get_match_data(dev); |
|
else |
|
info = renesas_usbhs_get_info(pdev); |
|
|
|
/* check platform information */ |
|
if (!info) { |
|
dev_err(dev, "no platform information\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* platform data */ |
|
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
|
if (!irq_res) { |
|
dev_err(dev, "Not enough Renesas USB platform resources.\n"); |
|
return -ENODEV; |
|
} |
|
|
|
/* usb private data */ |
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
priv->base = devm_platform_ioremap_resource(pdev, 0); |
|
if (IS_ERR(priv->base)) |
|
return PTR_ERR(priv->base); |
|
|
|
if (of_property_read_bool(dev_of_node(dev), "extcon")) { |
|
priv->edev = extcon_get_edev_by_phandle(dev, 0); |
|
if (IS_ERR(priv->edev)) |
|
return PTR_ERR(priv->edev); |
|
} |
|
|
|
priv->rsts = devm_reset_control_array_get_optional_shared(dev); |
|
if (IS_ERR(priv->rsts)) |
|
return PTR_ERR(priv->rsts); |
|
|
|
/* |
|
* care platform info |
|
*/ |
|
|
|
priv->dparam = info->driver_param; |
|
|
|
if (!info->platform_callback.get_id) { |
|
dev_err(dev, "no platform callbacks\n"); |
|
return -EINVAL; |
|
} |
|
priv->pfunc = &info->platform_callback; |
|
|
|
/* set default param if platform doesn't have */ |
|
if (usbhs_get_dparam(priv, has_new_pipe_configs)) { |
|
priv->dparam.pipe_configs = usbhsc_new_pipe; |
|
priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); |
|
} else if (!priv->dparam.pipe_configs) { |
|
priv->dparam.pipe_configs = usbhsc_default_pipe; |
|
priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); |
|
} |
|
if (!priv->dparam.pio_dma_border) |
|
priv->dparam.pio_dma_border = 64; /* 64byte */ |
|
if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp)) |
|
priv->dparam.buswait_bwait = tmp; |
|
gpiod = devm_gpiod_get_optional(dev, "renesas,enable", GPIOD_IN); |
|
if (IS_ERR(gpiod)) |
|
return PTR_ERR(gpiod); |
|
|
|
/* FIXME */ |
|
/* runtime power control ? */ |
|
if (priv->pfunc->get_vbus) |
|
usbhs_get_dparam(priv, runtime_pwctrl) = 1; |
|
|
|
/* |
|
* priv settings |
|
*/ |
|
priv->irq = irq_res->start; |
|
if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE) |
|
priv->irqflags = IRQF_SHARED; |
|
priv->pdev = pdev; |
|
INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); |
|
spin_lock_init(usbhs_priv_to_lock(priv)); |
|
|
|
/* call pipe and module init */ |
|
ret = usbhs_pipe_probe(priv); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = usbhs_fifo_probe(priv); |
|
if (ret < 0) |
|
goto probe_end_pipe_exit; |
|
|
|
ret = usbhs_mod_probe(priv); |
|
if (ret < 0) |
|
goto probe_end_fifo_exit; |
|
|
|
/* dev_set_drvdata should be called after usbhs_mod_init */ |
|
platform_set_drvdata(pdev, priv); |
|
|
|
ret = reset_control_deassert(priv->rsts); |
|
if (ret) |
|
goto probe_fail_rst; |
|
|
|
ret = usbhsc_clk_get(dev, priv); |
|
if (ret) |
|
goto probe_fail_clks; |
|
|
|
/* |
|
* deviece reset here because |
|
* USB device might be used in boot loader. |
|
*/ |
|
usbhs_sys_clock_ctrl(priv, 0); |
|
|
|
/* check GPIO determining if USB function should be enabled */ |
|
if (gpiod) { |
|
ret = !gpiod_get_value(gpiod); |
|
if (ret) { |
|
dev_warn(dev, "USB function not selected (GPIO)\n"); |
|
ret = -ENOTSUPP; |
|
goto probe_end_mod_exit; |
|
} |
|
} |
|
|
|
/* |
|
* platform call |
|
* |
|
* USB phy setup might depend on CPU/Board. |
|
* If platform has its callback functions, |
|
* call it here. |
|
*/ |
|
ret = usbhs_platform_call(priv, hardware_init, pdev); |
|
if (ret < 0) { |
|
dev_err(dev, "platform init failed.\n"); |
|
goto probe_end_mod_exit; |
|
} |
|
|
|
/* reset phy for connection */ |
|
usbhs_platform_call(priv, phy_reset, pdev); |
|
|
|
/* power control */ |
|
pm_runtime_enable(dev); |
|
if (!usbhs_get_dparam(priv, runtime_pwctrl)) { |
|
usbhsc_power_ctrl(priv, 1); |
|
usbhs_mod_autonomy_mode(priv); |
|
} else { |
|
usbhs_mod_non_autonomy_mode(priv); |
|
} |
|
|
|
/* |
|
* manual call notify_hotplug for cold plug |
|
*/ |
|
usbhsc_schedule_notify_hotplug(pdev); |
|
|
|
dev_info(dev, "probed\n"); |
|
|
|
return ret; |
|
|
|
probe_end_mod_exit: |
|
usbhsc_clk_put(priv); |
|
probe_fail_clks: |
|
reset_control_assert(priv->rsts); |
|
probe_fail_rst: |
|
usbhs_mod_remove(priv); |
|
probe_end_fifo_exit: |
|
usbhs_fifo_remove(priv); |
|
probe_end_pipe_exit: |
|
usbhs_pipe_remove(priv); |
|
|
|
dev_info(dev, "probe failed (%d)\n", ret); |
|
|
|
return ret; |
|
} |
|
|
|
static int usbhs_remove(struct platform_device *pdev) |
|
{ |
|
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); |
|
|
|
dev_dbg(&pdev->dev, "usb remove\n"); |
|
|
|
/* power off */ |
|
if (!usbhs_get_dparam(priv, runtime_pwctrl)) |
|
usbhsc_power_ctrl(priv, 0); |
|
|
|
pm_runtime_disable(&pdev->dev); |
|
|
|
usbhs_platform_call(priv, hardware_exit, pdev); |
|
usbhsc_clk_put(priv); |
|
reset_control_assert(priv->rsts); |
|
usbhs_mod_remove(priv); |
|
usbhs_fifo_remove(priv); |
|
usbhs_pipe_remove(priv); |
|
|
|
return 0; |
|
} |
|
|
|
static __maybe_unused int usbhsc_suspend(struct device *dev) |
|
{ |
|
struct usbhs_priv *priv = dev_get_drvdata(dev); |
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
|
|
|
if (mod) { |
|
usbhs_mod_call(priv, stop, priv); |
|
usbhs_mod_change(priv, -1); |
|
} |
|
|
|
if (mod || !usbhs_get_dparam(priv, runtime_pwctrl)) |
|
usbhsc_power_ctrl(priv, 0); |
|
|
|
return 0; |
|
} |
|
|
|
static __maybe_unused int usbhsc_resume(struct device *dev) |
|
{ |
|
struct usbhs_priv *priv = dev_get_drvdata(dev); |
|
struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
|
|
|
if (!usbhs_get_dparam(priv, runtime_pwctrl)) { |
|
usbhsc_power_ctrl(priv, 1); |
|
usbhs_mod_autonomy_mode(priv); |
|
} |
|
|
|
usbhs_platform_call(priv, phy_reset, pdev); |
|
|
|
usbhsc_schedule_notify_hotplug(pdev); |
|
|
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume); |
|
|
|
static struct platform_driver renesas_usbhs_driver = { |
|
.driver = { |
|
.name = "renesas_usbhs", |
|
.pm = &usbhsc_pm_ops, |
|
.of_match_table = of_match_ptr(usbhs_of_match), |
|
}, |
|
.probe = usbhs_probe, |
|
.remove = usbhs_remove, |
|
}; |
|
|
|
module_platform_driver(renesas_usbhs_driver); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION("Renesas USB driver"); |
|
MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");
|
|
|