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linux-next/drivers/usb/host/fsl-mph-dr-of.c
Gerhard Sittig d77276c432 USB: fsl-mph-dr-of: adjust for OF based clock lookup 
after device tree based clock lookup became available, the peripheral
driver need no longer construct clock names which include the component
index -- remove the "usb%d_clk" template, always use "ipg" instead

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Gerhard Sittig <gsi@denx.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
2014-01-12 18:53:05 +01:00

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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, "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 int usb_get_ver_info(struct device_node *np)
{
int ver = -1;
/*
* returns 1 for usb controller version 1.6
* returns 2 for usb controller version 2.2
* 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 /* for previous controller versions */
ver = FSL_USB_VER_OLD;
if (ver > -1)
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 /* 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);
if (pdata->have_sysif_regs) {
if (pdata->controller_ver < 0) {
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",
.owner = THIS_MODULE,
.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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