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- // 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 <log.h>
- #include <malloc.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;
- #if CONFIG_IS_ENABLED(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_USB0_CTRL 0x0
- #define AM335X_USB1_CTRL 0x8
- static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
- {
- struct ti_musb_plat *plat = dev_get_plat(dev);
- if (!plat->ctrl_mod_base)
- return;
- if (on) {
- clrsetbits_le32(plat->ctrl_mod_base,
- CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
- OTGVDET_EN | OTGSESSENDEN);
- } else {
- clrsetbits_le32(plat->ctrl_mod_base, 0,
- CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
- }
- }
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- 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 int ti_musb_of_to_plat(struct udevice *dev)
- {
- struct ti_musb_plat *plat = dev_get_plat(dev);
- const void *fdt = gd->fdt_blob;
- int node = dev_of_offset(dev);
- int phys;
- int ctrl_mod;
- int usb_index;
- struct musb_hdrc_config *musb_config;
- plat->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");
- plat->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
- usb_index = ti_musb_get_usb_index(node);
- switch (usb_index) {
- case 1:
- plat->ctrl_mod_base += AM335X_USB1_CTRL;
- break;
- case 0:
- plat->ctrl_mod_base += AM335X_USB0_CTRL;
- break;
- default:
- break;
- }
- musb_config = malloc(sizeof(struct musb_hdrc_config));
- memset(musb_config, 0, sizeof(struct musb_hdrc_config));
- musb_config->multipoint = fdtdec_get_int(fdt, node,
- "mentor,multipoint", -1);
- if (musb_config->multipoint < 0) {
- pr_err("MUSB multipoint DT entry missing\n");
- return -ENOENT;
- }
- musb_config->dyn_fifo = 1;
- musb_config->num_eps = fdtdec_get_int(fdt, node, "mentor,num-eps",
- -1);
- if (musb_config->num_eps < 0) {
- pr_err("MUSB num-eps DT entry missing\n");
- return -ENOENT;
- }
- musb_config->ram_bits = fdtdec_get_int(fdt, node, "mentor,ram-bits",
- -1);
- if (musb_config->ram_bits < 0) {
- pr_err("MUSB ram-bits DT entry missing\n");
- return -ENOENT;
- }
- plat->plat.config = musb_config;
- plat->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
- if (plat->plat.power < 0) {
- pr_err("MUSB mentor,power DT entry missing\n");
- return -ENOENT;
- }
- plat->plat.platform_ops = &musb_dsps_ops;
- return 0;
- }
- #endif
- static int ti_musb_host_probe(struct udevice *dev)
- {
- struct musb_host_data *host = dev_get_priv(dev);
- struct ti_musb_plat *plat = dev_get_plat(dev);
- struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
- int ret;
- priv->desc_before_addr = true;
- host->host = musb_init_controller(&plat->plat,
- NULL,
- plat->base);
- if (!host->host)
- return -EIO;
- ti_musb_set_phy_power(dev, 1);
- 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);
- ti_musb_set_phy_power(dev, 0);
- return 0;
- }
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- static int ti_musb_host_of_to_plat(struct udevice *dev)
- {
- struct ti_musb_plat *plat = dev_get_plat(dev);
- const void *fdt = gd->fdt_blob;
- int node = dev_of_offset(dev);
- int ret;
- ret = ti_musb_of_to_plat(dev);
- if (ret) {
- pr_err("plat dt parse error\n");
- return ret;
- }
- plat->plat.mode = MUSB_HOST;
- return 0;
- }
- #endif
- U_BOOT_DRIVER(ti_musb_host) = {
- .name = "ti-musb-host",
- .id = UCLASS_USB,
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- .of_to_plat = ti_musb_host_of_to_plat,
- #endif
- .probe = ti_musb_host_probe,
- .remove = ti_musb_host_remove,
- .ops = &musb_usb_ops,
- .plat_auto = sizeof(struct ti_musb_plat),
- .priv_auto = sizeof(struct musb_host_data),
- };
- #if CONFIG_IS_ENABLED(DM_USB_GADGET)
- struct ti_musb_peripheral {
- struct musb *periph;
- };
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- static int ti_musb_peripheral_of_to_plat(struct udevice *dev)
- {
- struct ti_musb_plat *plat = dev_get_plat(dev);
- const void *fdt = gd->fdt_blob;
- int node = dev_of_offset(dev);
- int ret;
- ret = ti_musb_of_to_plat(dev);
- if (ret) {
- pr_err("plat dt parse error\n");
- return ret;
- }
- plat->plat.mode = MUSB_PERIPHERAL;
- return 0;
- }
- #endif
- int dm_usb_gadget_handle_interrupts(struct udevice *dev)
- {
- struct ti_musb_peripheral *priv = dev_get_priv(dev);
- priv->periph->isr(0, priv->periph);
- return 0;
- }
- static int ti_musb_peripheral_probe(struct udevice *dev)
- {
- struct ti_musb_peripheral *priv = dev_get_priv(dev);
- struct ti_musb_plat *plat = dev_get_plat(dev);
- int ret;
- priv->periph = musb_init_controller(&plat->plat,
- NULL,
- plat->base);
- if (!priv->periph)
- return -EIO;
- ti_musb_set_phy_power(dev, 1);
- musb_gadget_setup(priv->periph);
- return usb_add_gadget_udc((struct device *)dev, &priv->periph->g);
- }
- static int ti_musb_peripheral_remove(struct udevice *dev)
- {
- struct ti_musb_peripheral *priv = dev_get_priv(dev);
- usb_del_gadget_udc(&priv->periph->g);
- ti_musb_set_phy_power(dev, 0);
- return 0;
- }
- U_BOOT_DRIVER(ti_musb_peripheral) = {
- .name = "ti-musb-peripheral",
- .id = UCLASS_USB_GADGET_GENERIC,
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- .of_to_plat = ti_musb_peripheral_of_to_plat,
- #endif
- .probe = ti_musb_peripheral_probe,
- .remove = ti_musb_peripheral_remove,
- .ops = &musb_usb_ops,
- .plat_auto = sizeof(struct ti_musb_plat),
- .priv_auto = sizeof(struct ti_musb_peripheral),
- .flags = DM_FLAG_PRE_RELOC,
- };
- #endif
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- static int ti_musb_wrapper_bind(struct udevice *parent)
- {
- ofnode node;
- int ret;
- ofnode_for_each_subnode(node, dev_ofnode(parent)) {
- struct udevice *dev;
- const char *name = ofnode_get_name(node);
- 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 */
- ret = device_bind_driver_to_node(parent,
- "ti-musb-peripheral",
- name,
- node,
- &dev);
- if (ret)
- pr_err("musb - not able to bind usb peripheral node\n");
- break;
- case USB_DR_MODE_HOST:
- /* Bind MUSB host */
- ret = device_bind_driver_to_node(parent,
- "ti-musb-host",
- name,
- node,
- &dev);
- if (ret)
- pr_err("musb - not able to bind usb host node\n");
- 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_IS_ENABLED(OF_CONTROL) */
- #endif /* CONFIG_IS_ENABLED(DM_USB) */
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