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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
255 lines
5.7 KiB
C
255 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* MISC driver for TI MUSB Glue.
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*
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* (C) Copyright 2016
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* Texas Instruments Incorporated, <www.ti.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <console.h>
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#include <dm.h>
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#include <linux/usb/otg.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <asm/io.h>
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#include <asm/omap_musb.h>
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#include "musb_uboot.h"
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_DM_USB
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/* USB 2.0 PHY Control */
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#define CM_PHY_PWRDN (1 << 0)
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#define CM_PHY_OTG_PWRDN (1 << 1)
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#define OTGVDET_EN (1 << 19)
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#define OTGSESSENDEN (1 << 20)
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#define AM335X_USB1_CTRL 0x8
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struct ti_musb_platdata {
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void *base;
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void *ctrl_mod_base;
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struct musb_hdrc_platform_data plat;
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struct musb_hdrc_config musb_config;
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struct omap_musb_board_data otg_board_data;
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};
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static int ti_musb_get_usb_index(int node)
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{
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const void *fdt = gd->fdt_blob;
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int i = 0;
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char path[64];
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const char *alias_path;
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char alias[16];
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fdt_get_path(fdt, node, path, sizeof(path));
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do {
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snprintf(alias, sizeof(alias), "usb%d", i);
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alias_path = fdt_get_alias(fdt, alias);
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if (alias_path == NULL) {
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debug("USB index not found\n");
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return -ENOENT;
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}
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if (!strcmp(path, alias_path))
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return i;
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i++;
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} while (alias_path);
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return -ENOENT;
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}
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static void ti_musb_set_phy_power(struct udevice *dev, u8 on)
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{
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struct ti_musb_platdata *platdata = dev_get_platdata(dev);
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if (on) {
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clrsetbits_le32(platdata->ctrl_mod_base,
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CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
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OTGVDET_EN | OTGSESSENDEN);
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} else {
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clrsetbits_le32(platdata->ctrl_mod_base, 0,
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CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
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}
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}
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static int ti_musb_ofdata_to_platdata(struct udevice *dev)
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{
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struct ti_musb_platdata *platdata = dev_get_platdata(dev);
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const void *fdt = gd->fdt_blob;
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int node = dev_of_offset(dev);
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int phys;
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int ctrl_mod;
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int usb_index;
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platdata->base = (void *)devfdt_get_addr_index(dev, 1);
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phys = fdtdec_lookup_phandle(fdt, node, "phys");
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ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod");
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platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg");
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usb_index = ti_musb_get_usb_index(node);
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switch (usb_index) {
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case 1:
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platdata->ctrl_mod_base += AM335X_USB1_CTRL;
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case 0:
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default:
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break;
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}
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platdata->musb_config.multipoint = fdtdec_get_int(fdt, node,
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"mentor,multipoint",
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-1);
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if (platdata->musb_config.multipoint < 0) {
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pr_err("MUSB multipoint DT entry missing\n");
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return -ENOENT;
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}
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platdata->musb_config.dyn_fifo = 1;
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platdata->musb_config.num_eps = fdtdec_get_int(fdt, node,
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"mentor,num-eps", -1);
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if (platdata->musb_config.num_eps < 0) {
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pr_err("MUSB num-eps DT entry missing\n");
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return -ENOENT;
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}
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platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node,
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"mentor,ram-bits", -1);
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if (platdata->musb_config.ram_bits < 0) {
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pr_err("MUSB ram-bits DT entry missing\n");
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return -ENOENT;
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}
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platdata->otg_board_data.set_phy_power = ti_musb_set_phy_power;
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platdata->otg_board_data.dev = dev;
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platdata->plat.config = &platdata->musb_config;
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platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1);
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if (platdata->plat.power < 0) {
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pr_err("MUSB mentor,power DT entry missing\n");
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return -ENOENT;
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}
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platdata->plat.platform_ops = &musb_dsps_ops;
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platdata->plat.board_data = &platdata->otg_board_data;
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return 0;
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}
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static int ti_musb_host_probe(struct udevice *dev)
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{
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struct musb_host_data *host = dev_get_priv(dev);
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struct ti_musb_platdata *platdata = dev_get_platdata(dev);
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struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
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struct omap_musb_board_data *otg_board_data;
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int ret;
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priv->desc_before_addr = true;
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otg_board_data = &platdata->otg_board_data;
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host->host = musb_init_controller(&platdata->plat,
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(struct device *)otg_board_data,
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platdata->base);
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if (!host->host)
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return -EIO;
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ret = musb_lowlevel_init(host);
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return ret;
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}
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static int ti_musb_host_remove(struct udevice *dev)
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{
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struct musb_host_data *host = dev_get_priv(dev);
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musb_stop(host->host);
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return 0;
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}
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static int ti_musb_host_ofdata_to_platdata(struct udevice *dev)
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{
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struct ti_musb_platdata *platdata = dev_get_platdata(dev);
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const void *fdt = gd->fdt_blob;
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int node = dev_of_offset(dev);
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int ret;
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ret = ti_musb_ofdata_to_platdata(dev);
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if (ret) {
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pr_err("platdata dt parse error\n");
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return ret;
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}
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platdata->plat.mode = MUSB_HOST;
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return 0;
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}
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U_BOOT_DRIVER(ti_musb_host) = {
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.name = "ti-musb-host",
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.id = UCLASS_USB,
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.ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
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.probe = ti_musb_host_probe,
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.remove = ti_musb_host_remove,
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.ops = &musb_usb_ops,
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.platdata_auto_alloc_size = sizeof(struct ti_musb_platdata),
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.priv_auto_alloc_size = sizeof(struct musb_host_data),
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};
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static int ti_musb_wrapper_bind(struct udevice *parent)
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{
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const void *fdt = gd->fdt_blob;
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int node;
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int ret;
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for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
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node = fdt_next_subnode(fdt, node)) {
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struct udevice *dev;
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const char *name = fdt_get_name(fdt, node, NULL);
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enum usb_dr_mode dr_mode;
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struct driver *drv;
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if (strncmp(name, "usb@", 4))
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continue;
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dr_mode = usb_get_dr_mode(node);
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switch (dr_mode) {
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case USB_DR_MODE_PERIPHERAL:
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/* Bind MUSB device */
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break;
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case USB_DR_MODE_HOST:
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/* Bind MUSB host */
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ret = device_bind_driver_to_node(parent, "ti-musb-host",
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name, offset_to_ofnode(node), &dev);
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if (ret) {
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pr_err("musb - not able to bind usb host node\n");
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return ret;
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}
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break;
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default:
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break;
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};
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}
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return 0;
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}
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static const struct udevice_id ti_musb_ids[] = {
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{ .compatible = "ti,am33xx-usb" },
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{ }
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};
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U_BOOT_DRIVER(ti_musb_wrapper) = {
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.name = "ti-musb-wrapper",
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.id = UCLASS_MISC,
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.of_match = ti_musb_ids,
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.bind = ti_musb_wrapper_bind,
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};
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#endif /* CONFIG_DM_USB */
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