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![Jean-Jacques Hiblot](/assets/img/avatar_default.png)
Enable DM for USB peripheral in the musb-new driver. Also make sure that the driver can be used in the SPL. This implies that: * the driver must work with and without the OF_CONTROL option. That in turn, implies that the platform data can be passed in a struct ti_musb_platdata or be read from the dtb * usb.o is linked in the SPL if host support is enabled Another change is that the driver does not fail to bind (and stop the boot process) if one of the child driver does not bind. Reporting the error is enough. This kind of error would appear if the port is configured in the DTS but the driver is not activated in the config. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
344 lines
7.7 KiB
C
344 lines
7.7 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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#if CONFIG_IS_ENABLED(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_USB0_CTRL 0x0
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#define AM335X_USB1_CTRL 0x8
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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 (!platdata->ctrl_mod_base)
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return;
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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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#if CONFIG_IS_ENABLED(OF_CONTROL)
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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 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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struct musb_hdrc_config *musb_config;
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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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break;
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case 0:
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platdata->ctrl_mod_base += AM335X_USB0_CTRL;
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break;
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default:
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break;
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}
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musb_config = malloc(sizeof(struct musb_hdrc_config));
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memset(musb_config, 0, sizeof(struct musb_hdrc_config));
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musb_config->multipoint = fdtdec_get_int(fdt, node,
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"mentor,multipoint", -1);
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if (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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musb_config->dyn_fifo = 1;
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musb_config->num_eps = fdtdec_get_int(fdt, node, "mentor,num-eps",
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-1);
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if (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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musb_config->ram_bits = fdtdec_get_int(fdt, node, "mentor,ram-bits",
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-1);
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if (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->plat.config = 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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return 0;
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}
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#endif
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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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int ret;
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priv->desc_before_addr = true;
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host->host = musb_init_controller(&platdata->plat,
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NULL,
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platdata->base);
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if (!host->host)
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return -EIO;
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ti_musb_set_phy_power(dev, 1);
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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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ti_musb_set_phy_power(dev, 0);
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return 0;
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}
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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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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#endif
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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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#if CONFIG_IS_ENABLED(OF_CONTROL)
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.ofdata_to_platdata = ti_musb_host_ofdata_to_platdata,
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#endif
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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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#if CONFIG_IS_ENABLED(DM_USB_GADGET)
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struct ti_musb_peripheral {
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struct musb *periph;
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};
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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static int ti_musb_peripheral_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_PERIPHERAL;
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return 0;
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}
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#endif
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int dm_usb_gadget_handle_interrupts(struct udevice *dev)
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{
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struct ti_musb_peripheral *priv = dev_get_priv(dev);
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priv->periph->isr(0, priv->periph);
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return 0;
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}
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static int ti_musb_peripheral_probe(struct udevice *dev)
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{
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struct ti_musb_peripheral *priv = dev_get_priv(dev);
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struct ti_musb_platdata *platdata = dev_get_platdata(dev);
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int ret;
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priv->periph = musb_init_controller(&platdata->plat,
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NULL,
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platdata->base);
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if (!priv->periph)
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return -EIO;
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ti_musb_set_phy_power(dev, 1);
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musb_gadget_setup(priv->periph);
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return usb_add_gadget_udc((struct device *)dev, &priv->periph->g);
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}
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static int ti_musb_peripheral_remove(struct udevice *dev)
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{
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struct ti_musb_peripheral *priv = dev_get_priv(dev);
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usb_del_gadget_udc(&priv->periph->g);
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ti_musb_set_phy_power(dev, 0);
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return 0;
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}
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U_BOOT_DRIVER(ti_musb_peripheral) = {
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.name = "ti-musb-peripheral",
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.id = UCLASS_USB_GADGET_GENERIC,
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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.ofdata_to_platdata = ti_musb_peripheral_ofdata_to_platdata,
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#endif
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.probe = ti_musb_peripheral_probe,
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.remove = ti_musb_peripheral_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 ti_musb_peripheral),
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.flags = DM_FLAG_PRE_RELOC,
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};
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#endif
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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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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ret = device_bind_driver_to_node(parent,
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"ti-musb-peripheral",
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name,
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offset_to_ofnode(node),
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&dev);
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if (ret)
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pr_err("musb - not able to bind usb peripheral node\n");
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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,
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"ti-musb-host",
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name,
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offset_to_ofnode(node),
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&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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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_IS_ENABLED(OF_CONTROL) */
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#endif /* CONFIG_IS_ENABLED(DM_USB) */
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