[U-Boot] [PATCH 06/17] drivers: usb: musb: add ti musb host driver with driver model support

Mugunthan V N
2016-02-29T03:44:09Z

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>
---
drivers/usb/musb-new/ti-musb.c | 191 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 191 insertions(+)

diff --git a/drivers/usb/musb-new/ti-musb.c b/drivers/usb/musb-new/ti-musb.c
index c1a4952..adc68e6 100644
--- a/drivers/usb/musb-new/ti-musb.c
+++ b/drivers/usb/musb-new/ti-musb.c
@@ -14,10 +14,195 @@
#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;
+ int phys;
+ int ctrl_mod;
+ int usb_index;
+
+ platdata->base = (void *)dev_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) {
+ error("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) {
+ error("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) {
+ error("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) {
+ error("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;
+ int ret;
+
+ ret = ti_musb_ofdata_to_platdata(dev);
+ if (ret) {
+ error("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 const char *const usb_dr_modes[] = {
[USB_DR_MODE_UNKNOWN] = "",
[USB_DR_MODE_HOST] = "host",
@@ -66,6 +251,12 @@ static int ti_musb_wrapper_bind(struct udevice *parent)
break;
case USB_DR_MODE_HOST:
/* Bind MUSB host */
+ ret = device_bind_driver_to_node(parent, "ti-musb-host",
+ name, node, &dev);
+ if (ret) {
+ error("musb - not able to bind usb host node\n");
+ return ret;
+ }
break;
default:
break;
--
2.7.2.333.g70bd996