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usb: dwc3: core: make dwc3 core build in uboot

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*) Changed the include header files to that used in u-boot.
*) Removed phy_* APIs
*) Removed jiffies and used a simple while loop
*) Used dma_alloc_coherent and dma_free_coherent APIs of u-boot
*) Fixed other misc warnings

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
master
Kishon Vijay Abraham I 10 years ago committed by Marek Vasut
parent 6f80390691
commit 71744d0d06
3 changed files with 40 additions and 196 deletions
  1. 216
      drivers/usb/dwc3/core.c
  2. 10
      drivers/usb/dwc3/core.h
  3. 10
      drivers/usb/dwc3/linux-compat.h

216
drivers/usb/dwc3/core.c
Unescape View File

@ -14,32 +14,19 @@
* SPDX-License-Identifier: GPL-2.0
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <common.h>
#include <malloc.h>
#include <asm/dma-mapping.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/of.h>
#include <linux/acpi.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/of.h>
#include <linux/usb/otg.h>
#include "platform_data.h"
#include "core.h"
#include "gadget.h"
#include "io.h"
#include "debug.h"
#include "linux-compat.h"
/* -------------------------------------------------------------------------- */
@ -60,7 +47,6 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
static int dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
int ret;
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
@ -77,17 +63,6 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
usb_phy_init(dwc->usb2_phy);
usb_phy_init(dwc->usb3_phy);
ret = phy_init(dwc->usb2_generic_phy);
if (ret < 0)
return ret;
ret = phy_init(dwc->usb3_generic_phy);
if (ret < 0) {
phy_exit(dwc->usb2_generic_phy);
return ret;
}
mdelay(100);
/* Clear USB3 PHY reset */
@ -118,7 +93,7 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
struct dwc3_event_buffer *evt)
{
dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma);
dma_free_coherent(evt->buf);
}
/**
@ -140,8 +115,8 @@ static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,
evt->dwc = dwc;
evt->length = length;
evt->buf = dma_alloc_coherent(dwc->dev, length,
&evt->dma, GFP_KERNEL);
evt->buf = dma_alloc_coherent(length,
(unsigned long *)&evt->dma);
if (!evt->buf)
return ERR_PTR(-ENOMEM);
@ -276,13 +251,9 @@ static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
if (!dwc->nr_scratch)
return 0;
/* should never fall here */
if (!WARN_ON(dwc->scratchbuf))
return 0;
scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf,
dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
DMA_BIDIRECTIONAL);
scratch_addr = dma_map_single(dwc->scratchbuf,
dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(dwc->dev, scratch_addr)) {
dev_err(dwc->dev, "failed to map scratch buffer\n");
ret = -EFAULT;
@ -308,8 +279,8 @@ static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
return 0;
err1:
dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
dma_unmap_single((void *)dwc->scratch_addr, dwc->nr_scratch *
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
err0:
return ret;
@ -323,12 +294,8 @@ static void dwc3_free_scratch_buffers(struct dwc3 *dwc)
if (!dwc->nr_scratch)
return;
/* should never fall here */
if (!WARN_ON(dwc->scratchbuf))
return;
dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
dma_unmap_single((void *)dwc->scratch_addr, dwc->nr_scratch *
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
kfree(dwc->scratchbuf);
}
@ -446,12 +413,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
}
dwc->revision = reg;
/*
* Write Linux Version Code to our GUID register so it's easy to figure
* out which kernel version a bug was found.
*/
dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE);
/* Handle USB2.0-only core configuration */
if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {
@ -460,21 +421,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
}
/* issue device SoftReset too */
timeout = jiffies + msecs_to_jiffies(500);
timeout = 5000;
dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
do {
while (timeout--) {
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (!(reg & DWC3_DCTL_CSFTRST))
break;
};
if (time_after(jiffies, timeout)) {
dev_err(dwc->dev, "Reset Timed Out\n");
ret = -ETIMEDOUT;
goto err0;
}
cpu_relax();
} while (true);
if (!timeout) {
dev_err(dwc->dev, "Reset Timed Out\n");
ret = -ETIMEDOUT;
goto err0;
}
ret = dwc3_core_soft_reset(dwc);
if (ret)
@ -525,8 +484,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc->is_fpga = true;
}
WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga,
"disable_scramble cannot be used on non-FPGA builds\n");
if(dwc->disable_scramble_quirk && !dwc->is_fpga)
WARN(true,
"disable_scramble cannot be used on non-FPGA builds\n");
if (dwc->disable_scramble_quirk && dwc->is_fpga)
reg |= DWC3_GCTL_DISSCRAMBLE;
@ -553,22 +513,16 @@ static int dwc3_core_init(struct dwc3 *dwc)
ret = dwc3_alloc_scratch_buffers(dwc);
if (ret)
goto err1;
goto err0;
ret = dwc3_setup_scratch_buffers(dwc);
if (ret)
goto err2;
goto err1;
return 0;
err2:
dwc3_free_scratch_buffers(dwc);
err1:
usb_phy_shutdown(dwc->usb2_phy);
usb_phy_shutdown(dwc->usb3_phy);
phy_exit(dwc->usb2_generic_phy);
phy_exit(dwc->usb3_generic_phy);
dwc3_free_scratch_buffers(dwc);
err0:
return ret;
@ -577,82 +531,10 @@ err0:
static void dwc3_core_exit(struct dwc3 *dwc)
{
dwc3_free_scratch_buffers(dwc);
usb_phy_shutdown(dwc->usb2_phy);
usb_phy_shutdown(dwc->usb3_phy);
phy_exit(dwc->usb2_generic_phy);
phy_exit(dwc->usb3_generic_phy);
}
static int dwc3_core_get_phy(struct dwc3 *dwc)
{
struct device *dev = dwc->dev;
struct device_node *node = dev->of_node;
int ret;
if (node) {
dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
} else {
dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
}
if (IS_ERR(dwc->usb2_phy)) {
ret = PTR_ERR(dwc->usb2_phy);
if (ret == -ENXIO || ret == -ENODEV) {
dwc->usb2_phy = NULL;
} else if (ret == -EPROBE_DEFER) {
return ret;
} else {
dev_err(dev, "no usb2 phy configured\n");
return ret;
}
}
if (IS_ERR(dwc->usb3_phy)) {
ret = PTR_ERR(dwc->usb3_phy);
if (ret == -ENXIO || ret == -ENODEV) {
dwc->usb3_phy = NULL;
} else if (ret == -EPROBE_DEFER) {
return ret;
} else {
dev_err(dev, "no usb3 phy configured\n");
return ret;
}
}
dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
if (IS_ERR(dwc->usb2_generic_phy)) {
ret = PTR_ERR(dwc->usb2_generic_phy);
if (ret == -ENOSYS || ret == -ENODEV) {
dwc->usb2_generic_phy = NULL;
} else if (ret == -EPROBE_DEFER) {
return ret;
} else {
dev_err(dev, "no usb2 phy configured\n");
return ret;
}
}
dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
if (IS_ERR(dwc->usb3_generic_phy)) {
ret = PTR_ERR(dwc->usb3_generic_phy);
if (ret == -ENOSYS || ret == -ENODEV) {
dwc->usb3_generic_phy = NULL;
} else if (ret == -EPROBE_DEFER) {
return ret;
} else {
dev_err(dev, "no usb3 phy configured\n");
return ret;
}
}
return 0;
}
static int dwc3_core_init_mode(struct dwc3 *dwc)
{
struct device *dev = dwc->dev;
int ret;
switch (dwc->dr_mode) {
@ -870,10 +752,6 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->hird_threshold = hird_threshold
| (dwc->is_utmi_l1_suspend << 4);
ret = dwc3_core_get_phy(dwc);
if (ret)
return ret;
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
@ -888,8 +766,7 @@ static int dwc3_probe(struct platform_device *pdev)
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
goto err0;
return -ENOMEM;
}
if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
@ -906,49 +783,22 @@ static int dwc3_probe(struct platform_device *pdev)
goto err0;
}
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
ret = phy_power_on(dwc->usb2_generic_phy);
if (ret < 0)
goto err1;
ret = phy_power_on(dwc->usb3_generic_phy);
if (ret < 0)
goto err_usb2phy_power;
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
goto err_usb3phy_power;
goto err1;
}
ret = dwc3_core_init_mode(dwc);
if (ret)
goto err2;
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize debugfs\n");
goto err3;
}
return 0;
err3:
dwc3_core_exit_mode(dwc);
err2:
dwc3_event_buffers_cleanup(dwc);
err_usb3phy_power:
phy_power_off(dwc->usb3_generic_phy);
err_usb2phy_power:
phy_power_off(dwc->usb2_generic_phy);
err1:
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
dwc3_core_exit(dwc);
err0:
@ -961,16 +811,10 @@ static int dwc3_remove(struct platform_device *pdev)
{
struct dwc3 *dwc = platform_get_drvdata(pdev);
dwc3_debugfs_exit(dwc);
dwc3_core_exit_mode(dwc);
dwc3_event_buffers_cleanup(dwc);
dwc3_free_event_buffers(dwc);
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
phy_power_off(dwc->usb2_generic_phy);
phy_power_off(dwc->usb3_generic_phy);
dwc3_core_exit(dwc);
return 0;

10
drivers/usb/dwc3/core.h
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@ -641,10 +641,6 @@ struct dwc3_scratchpad_array {
* @maximum_speed: maximum speed requested (mainly for testing purposes)
* @revision: revision register contents
* @dr_mode: requested mode of operation
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
* @usb2_generic_phy: pointer to USB2 PHY
* @usb3_generic_phy: pointer to USB3 PHY
* @dcfg: saved contents of DCFG register
* @gctl: saved contents of GCTL register
* @isoch_delay: wValue from Set Isochronous Delay request;
@ -726,12 +722,6 @@ struct dwc3 {
struct usb_gadget gadget;
struct usb_gadget_driver *gadget_driver;
struct usb_phy *usb2_phy;
struct usb_phy *usb3_phy;
struct phy *usb2_generic_phy;
struct phy *usb3_generic_phy;
void __iomem *regs;
size_t regs_size;

10
drivers/usb/dwc3/linux-compat.h
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@ -25,4 +25,14 @@ static inline size_t strlcat(char *dest, const char *src, size_t n)
return strlen(dest) + strlen(src);
}
static inline void *devm_kzalloc(struct device *dev, unsigned int size,
unsigned int flags)
{
return kzalloc(size, flags);
}
static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags)
{
return kzalloc(n * size, flags);
}
#endif

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