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linux_dsm_epyc7002/drivers/usb/host/fsl-mph-dr-of.c
Nikhil Badola f8786a9154 drivers: usb: fsl: Workaround for USB erratum-A005275 
Incoming packets in high speed are randomly corrupted by h/w
resulting in multiple errors. This workaround makes FS as
default mode in all affected socs by disabling HS chirp
signalling.This errata does not affect FS and LS mode.

Forces all HS devices to connect in FS mode for all socs
affected by this erratum:
P3041 and P2041 rev 1.0 and 1.1
P5020 and P5010 rev 1.0 and 2.0
P5040, P1010 and T4240 rev 1.0

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-08-14 16:50:36 -07:00

369 lines
9.8 KiB
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/*
* Setup platform devices needed by the Freescale multi-port host
* and/or dual-role USB controller modules based on the description
* in flat device tree.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <linux/module.h>
struct fsl_usb2_dev_data {
char *dr_mode; /* controller mode */
char *drivers[3]; /* drivers to instantiate for this mode */
enum fsl_usb2_operating_modes op_mode; /* operating mode */
};
static struct fsl_usb2_dev_data dr_mode_data[] = {
{
.dr_mode = "host",
.drivers = { "fsl-ehci", NULL, NULL, },
.op_mode = FSL_USB2_DR_HOST,
},
{
.dr_mode = "otg",
.drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
.op_mode = FSL_USB2_DR_OTG,
},
{
.dr_mode = "peripheral",
.drivers = { "fsl-usb2-udc", NULL, NULL, },
.op_mode = FSL_USB2_DR_DEVICE,
},
};
static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
{
const unsigned char *prop;
int i;
prop = of_get_property(np, "dr_mode", NULL);
if (prop) {
for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
if (!strcmp(prop, dr_mode_data[i].dr_mode))
return &dr_mode_data[i];
}
}
pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
np->full_name);
return &dr_mode_data[0]; /* mode not specified, use host */
}
static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
{
if (!phy_type)
return FSL_USB2_PHY_NONE;
if (!strcasecmp(phy_type, "ulpi"))
return FSL_USB2_PHY_ULPI;
if (!strcasecmp(phy_type, "utmi"))
return FSL_USB2_PHY_UTMI;
if (!strcasecmp(phy_type, "utmi_wide"))
return FSL_USB2_PHY_UTMI_WIDE;
if (!strcasecmp(phy_type, "utmi_dual"))
return FSL_USB2_PHY_UTMI_DUAL;
if (!strcasecmp(phy_type, "serial"))
return FSL_USB2_PHY_SERIAL;
return FSL_USB2_PHY_NONE;
}
static struct platform_device *fsl_usb2_device_register(
struct platform_device *ofdev,
struct fsl_usb2_platform_data *pdata,
const char *name, int id)
{
struct platform_device *pdev;
const struct resource *res = ofdev->resource;
unsigned int num = ofdev->num_resources;
int retval;
pdev = platform_device_alloc(name, id);
if (!pdev) {
retval = -ENOMEM;
goto error;
}
pdev->dev.parent = &ofdev->dev;
pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
*pdev->dev.dma_mask = *ofdev->dev.dma_mask;
retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
if (retval)
goto error;
if (num) {
retval = platform_device_add_resources(pdev, res, num);
if (retval)
goto error;
}
retval = platform_device_add(pdev);
if (retval)
goto error;
return pdev;
error:
platform_device_put(pdev);
return ERR_PTR(retval);
}
static const struct of_device_id fsl_usb2_mph_dr_of_match[];
static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
{
enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
/*
* returns 1 for usb controller version 1.6
* returns 2 for usb controller version 2.2
* returns 3 for usb controller version 2.4
* returns 4 for usb controller version 2.5
* returns 0 otherwise
*/
if (of_device_is_compatible(np, "fsl-usb2-dr")) {
if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
ver = FSL_USB_VER_1_6;
else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
ver = FSL_USB_VER_2_2;
else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
ver = FSL_USB_VER_2_4;
else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
ver = FSL_USB_VER_2_5;
else /* for previous controller versions */
ver = FSL_USB_VER_OLD;
if (ver > FSL_USB_VER_NONE)
return ver;
}
if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
return FSL_USB_VER_OLD;
if (of_device_is_compatible(np, "fsl-usb2-mph")) {
if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
ver = FSL_USB_VER_1_6;
else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
ver = FSL_USB_VER_2_2;
else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
ver = FSL_USB_VER_2_4;
else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
ver = FSL_USB_VER_2_5;
else /* for previous controller versions */
ver = FSL_USB_VER_OLD;
}
return ver;
}
static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
{
struct device_node *np = ofdev->dev.of_node;
struct platform_device *usb_dev;
struct fsl_usb2_platform_data data, *pdata;
struct fsl_usb2_dev_data *dev_data;
const struct of_device_id *match;
const unsigned char *prop;
static unsigned int idx;
int i;
if (!of_device_is_available(np))
return -ENODEV;
match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
if (!match)
return -ENODEV;
pdata = &data;
if (match->data)
memcpy(pdata, match->data, sizeof(data));
else
memset(pdata, 0, sizeof(data));
dev_data = get_dr_mode_data(np);
if (of_device_is_compatible(np, "fsl-usb2-mph")) {
if (of_get_property(np, "port0", NULL))
pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
if (of_get_property(np, "port1", NULL))
pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
pdata->operating_mode = FSL_USB2_MPH_HOST;
} else {
if (of_get_property(np, "fsl,invert-drvvbus", NULL))
pdata->invert_drvvbus = 1;
if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
pdata->invert_pwr_fault = 1;
/* setup mode selected in the device tree */
pdata->operating_mode = dev_data->op_mode;
}
prop = of_get_property(np, "phy_type", NULL);
pdata->phy_mode = determine_usb_phy(prop);
pdata->controller_ver = usb_get_ver_info(np);
/* Activate Erratum by reading property in device tree */
if (of_get_property(np, "fsl,usb-erratum-a007792", NULL))
pdata->has_fsl_erratum_a007792 = 1;
else
pdata->has_fsl_erratum_a007792 = 0;
if (of_get_property(np, "fsl,usb-erratum-a005275", NULL))
pdata->has_fsl_erratum_a005275 = 1;
else
pdata->has_fsl_erratum_a005275 = 0;
/*
* Determine whether phy_clk_valid needs to be checked
* by reading property in device tree
*/
if (of_get_property(np, "phy-clk-valid", NULL))
pdata->check_phy_clk_valid = 1;
else
pdata->check_phy_clk_valid = 0;
if (pdata->have_sysif_regs) {
if (pdata->controller_ver == FSL_USB_VER_NONE) {
dev_warn(&ofdev->dev, "Could not get controller version\n");
return -ENODEV;
}
}
for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
if (!dev_data->drivers[i])
continue;
usb_dev = fsl_usb2_device_register(ofdev, pdata,
dev_data->drivers[i], idx);
if (IS_ERR(usb_dev)) {
dev_err(&ofdev->dev, "Can't register usb device\n");
return PTR_ERR(usb_dev);
}
}
idx++;
return 0;
}
static int __unregister_subdev(struct device *dev, void *d)
{
platform_device_unregister(to_platform_device(dev));
return 0;
}
static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
{
device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
return 0;
}
#ifdef CONFIG_PPC_MPC512x
#define USBGENCTRL 0x200 /* NOTE: big endian */
#define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */
#define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/
#define GC_PPP (1 << 3) /* Inv. Port Power Polarity */
#define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */
#define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */
#define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */
#define ISIPHYCTRL 0x204 /* NOTE: big endian */
#define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */
#define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */
#define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */
#define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */
#define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */
int fsl_usb2_mpc5121_init(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct clk *clk;
int err;
clk = devm_clk_get(pdev->dev.parent, "ipg");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clk\n");
return PTR_ERR(clk);
}
err = clk_prepare_enable(clk);
if (err) {
dev_err(&pdev->dev, "failed to enable clk\n");
return err;
}
pdata->clk = clk;
if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
u32 reg = 0;
if (pdata->invert_drvvbus)
reg |= GC_PPP;
if (pdata->invert_pwr_fault)
reg |= GC_PFP;
out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
out_be32(pdata->regs + USBGENCTRL, reg);
}
return 0;
}
static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
pdata->regs = NULL;
if (pdata->clk)
clk_disable_unprepare(pdata->clk);
}
static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
.big_endian_desc = 1,
.big_endian_mmio = 1,
.es = 1,
.have_sysif_regs = 0,
.le_setup_buf = 1,
.init = fsl_usb2_mpc5121_init,
.exit = fsl_usb2_mpc5121_exit,
};
#endif /* CONFIG_PPC_MPC512x */
static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
.have_sysif_regs = 1,
};
static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
{ .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
{ .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
#ifdef CONFIG_PPC_MPC512x
{ .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
#endif
{},
};
static struct platform_driver fsl_usb2_mph_dr_driver = {
.driver = {
.name = "fsl-usb2-mph-dr",
.of_match_table = fsl_usb2_mph_dr_of_match,
},
.probe = fsl_usb2_mph_dr_of_probe,
.remove = fsl_usb2_mph_dr_of_remove,
};
module_platform_driver(fsl_usb2_mph_dr_driver);
MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
MODULE_LICENSE("GPL");
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