drivers: usb: musb: add ti musb host driver with driver model support
Add a TI MUSB host driver with driver model support and the driver will be bound by the MUSB wrapper driver based on the dr_mode device tree entry. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Mugunthan V N
Simon Glass
parent
1cac34ce16
commit
ae6acf9fe2
@ -14,10 +14,195 @@
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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;
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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 *)dev_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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error("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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error("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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error("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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error("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;
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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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error("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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@ -41,6 +226,12 @@ static int ti_musb_wrapper_bind(struct udevice *parent)
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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, node, &dev);
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if (ret) {
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error("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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