// SPDX-License-Identifier: GPL-2.0+
/*
* MISC driver for TI MUSB Glue.
*
* (C) Copyright 2016
* Texas Instruments Incorporated, <www.ti.com>
*/
#include <common.h>
#include <command.h>
#include <console.h>
#include <dm.h>
#include <linux/usb/otg.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <asm/io.h>
#include <asm/omap_musb.h>
#include "musb_uboot.h"
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_DM_USB
/* USB 2.0 PHY Control */
#define CM_PHY_PWRDN (1 << 0)
#define CM_PHY_OTG_PWRDN (1 << 1)
#define OTGVDET_EN (1 << 19)
#define OTGSESSENDEN (1 << 20)
#define AM335X_USB1_CTRL 0x8
struct ti_musb_platdata {
void *base;
void *ctrl_mod_base;
struct musb_hdrc_platform_data plat;
struct musb_hdrc_config musb_config;
struct omap_musb_board_data otg_board_data;
};
static int ti_musb_get_usb_index(int node)
{
const void *fdt = gd->fdt_blob;
int i = 0;
char path[64];
const char *alias_path;
char alias[16];
fdt_get_path(fdt, node, path, sizeof(path));
do {
snprintf(alias, sizeof(alias), "usb%d", i);
alias_path = fdt_get_alias(fdt, alias);
if (alias_path == NULL) {
debug("USB index not found\n");
return -ENOENT;
}
if (!strcmp(path, alias_path))
return i;
i++;
} while (alias_path);
return -ENOENT;
}
static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
{
struct ti_musb_platdata *platdata = dev_get_platdata(dev);
if (on) {
clrsetbits_le32(platdata->ctrl_mod_base,
CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
OTGVDET_EN | OTGSESSENDEN);
} else {
clrsetbits_le32(platdata->ctrl_mod_base, 0,
CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
}
}
static int ti_musb_ofdata_to_platdata(struct udevice *dev)
{
struct ti_musb_platdata *platdata = dev_get_platdata(dev);
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(dev);
int phys;
int ctrl_mod;
int usb_index;
platdata->base = (void *)devfdt_get_addr_index(dev, 1);
phys = fdtdec_lookup_phandle(fdt, node, "phys");
ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
usb_index = ti_musb_get_usb_index(node);
switch (usb_index) {
case 1:
platdata->ctrl_mod_base += AM335X_USB1_CTRL;
case 0:
default:
break;
}
platdata->musb_config.multipoint = fdtdec_get_int(fdt, node,
"mentor,multipoint",
-1);
if (platdata->musb_config.multipoint < 0) {
pr_err("MUSB multipoint DT entry missing\n");
return -ENOENT;
}
platdata->musb_config.dyn_fifo = 1;
platdata->musb_config.num_eps = fdtdec_get_int(fdt, node,
"mentor,num-eps", -1);
if (platdata->musb_config.num_eps < 0) {
pr_err("MUSB num-eps DT entry missing\n");
return -ENOENT;
}
platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node,
"mentor,ram-bits", -1);
if (platdata->musb_config.ram_bits < 0) {
pr_err("MUSB ram-bits DT entry missing\n");
return -ENOENT;
}
platdata->otg_board_data.set_phy_power = ti_musb_set_phy_power;
platdata->otg_board_data.dev = dev;
platdata->plat.config = &platdata->musb_config;
platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
if (platdata->plat.power < 0) {
pr_err("MUSB mentor,power DT entry missing\n");
return -ENOENT;
}
platdata->plat.platform_ops = &musb_dsps_ops;
platdata->plat.board_data = &platdata->otg_board_data;
return 0;
}
static int ti_musb_host_probe(struct udevice *dev)
{
struct musb_host_data *host = dev_get_priv(dev);
struct ti_musb_platdata *platdata = dev_get_platdata(dev);
struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
struct omap_musb_board_data *otg_board_data;
int ret;
priv->desc_before_addr = true;
otg_board_data = &platdata->otg_board_data;
host->host = musb_init_controller(&platdata->plat,
(struct device *)otg_board_data,
platdata->base);
if (!host->host)
return -EIO;
ret = musb_lowlevel_init(host);
return ret;
}
static int ti_musb_host_remove(struct udevice *dev)
{
struct musb_host_data *host = dev_get_priv(dev);
musb_stop(host->host);
return 0;
}
static int ti_musb_host_ofdata_to_platdata(struct udevice *dev)
{
struct ti_musb_platdata *platdata = dev_get_platdata(dev);
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(dev);
int ret;
ret = ti_musb_ofdata_to_platdata(dev);
if (ret) {
pr_err("platdata dt parse error\n");
return ret;
}
platdata->plat.mode = MUSB_HOST;
return 0;
}
U_BOOT_DRIVER(ti_musb_host) = {
.name = "ti-musb-host",
.id = UCLASS_USB,
.ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
.probe = ti_musb_host_probe,
.remove = ti_musb_host_remove,
.ops = &musb_usb_ops,
.platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
.priv_auto_alloc_size = sizeof(struct musb_host_data),
};
static int ti_musb_wrapper_bind(struct udevice *parent)
{
const void *fdt = gd->fdt_blob;
int node;
int ret;
for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
node = fdt_next_subnode(fdt, node)) {
struct udevice *dev;
const char *name = fdt_get_name(fdt, node, NULL);
enum usb_dr_mode dr_mode;
struct driver *drv;
if (strncmp(name, "usb@", 4))
continue;
dr_mode = usb_get_dr_mode(node);
switch (dr_mode) {
case USB_DR_MODE_PERIPHERAL:
/* Bind MUSB device */
break;
case USB_DR_MODE_HOST:
/* Bind MUSB host */
ret = device_bind_driver_to_node(parent, "ti-musb-host",
name, offset_to_ofnode(node), &dev);
if (ret) {
pr_err("musb - not able to bind usb host node\n");
return ret;
}
break;
default:
break;
};
}
return 0;
}
static const struct udevice_id ti_musb_ids[] = {
{ .compatible = "ti,am33xx-usb" },
{ }
};
U_BOOT_DRIVER(ti_musb_wrapper) = {
.name = "ti-musb-wrapper",
.id = UCLASS_MISC,
.of_match = ti_musb_ids,
.bind = ti_musb_wrapper_bind,
};
#endif /* CONFIG_DM_USB */