[U-Boot] [PATCH v2 1/4] usb: host: ehci-vf: Migrate Vybrid USB to driver model
Sanchayan Maity
maitysanchayan at gmail.com
Tue Aug 9 20:14:59 CEST 2016
Add driver model support for Vybrid USB driver.
Signed-off-by: Sanchayan Maity <maitysanchayan at gmail.com>
---
drivers/usb/host/ehci-vf.c | 208 +++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 201 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/ehci-vf.c b/drivers/usb/host/ehci-vf.c
index 61789dd..f6f9efb 100644
--- a/drivers/usb/host/ehci-vf.c
+++ b/drivers/usb/host/ehci-vf.c
@@ -8,16 +8,20 @@
*/
#include <common.h>
+#include <dm.h>
#include <usb.h>
#include <errno.h>
#include <linux/compiler.h>
#include <asm/io.h>
+#include <asm-generic/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/crm_regs.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/imx-common/regs-usbphy.h>
#include <usb/ehci-ci.h>
+#include <libfdt.h>
+#include <fdtdec.h>
#include "ehci.h"
@@ -32,6 +36,8 @@
#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */
#define UCMD_RESET (1 << 1) /* controller reset */
+DECLARE_GLOBAL_DATA_PTR;
+
static const unsigned phy_bases[] = {
USB_PHY0_BASE_ADDR,
USB_PHY1_BASE_ADDR,
@@ -131,24 +137,39 @@ int __weak board_ehci_hcd_init(int port)
return 0;
}
+int ehci_vf_common_init(struct usb_ehci *ehci, int index)
+{
+ int ret;
+
+ /* Do board specific initialisation */
+ ret = board_ehci_hcd_init(index);
+ if (ret)
+ return ret;
+
+ usb_power_config(index);
+ usb_oc_config(index);
+ usb_internal_phy_clock_gate(index);
+ usb_phy_enable(index, ehci);
+
+ return 0;
+}
+
+#ifndef CONFIG_DM_USB
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
struct usb_ehci *ehci;
enum usb_init_type type;
+ int ret;
if (index >= ARRAY_SIZE(nc_reg_bases))
return -EINVAL;
ehci = (struct usb_ehci *)nc_reg_bases[index];
- /* Do board specific initialisation */
- board_ehci_hcd_init(index);
-
- usb_power_config(index);
- usb_oc_config(index);
- usb_internal_phy_clock_gate(index);
- usb_phy_enable(index, ehci);
+ ret = ehci_vf_common_init(index);
+ if (ret)
+ return ret;
*hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
*hcor = (struct ehci_hcor *)((uint32_t)*hccr +
@@ -175,3 +196,176 @@ int ehci_hcd_stop(int index)
{
return 0;
}
+#else
+/* Possible port types (dual role mode) */
+enum dr_mode {
+ DR_MODE_NONE = 0,
+ DR_MODE_HOST, /* supports host operation */
+ DR_MODE_DEVICE, /* supports device operation */
+ DR_MODE_OTG, /* supports both */
+};
+
+struct ehci_vf_priv_data {
+ struct ehci_ctrl ctrl;
+ struct usb_ehci *ehci;
+ struct gpio_desc cdet_gpio;
+ enum usb_init_type init_type;
+ enum dr_mode dr_mode;
+ u32 portnr;
+};
+
+static int vf_usb_ofdata_to_platdata(struct udevice *dev)
+{
+ struct ehci_vf_priv_data *priv = dev_get_priv(dev);
+ const void *dt_blob = gd->fdt_blob;
+ int node = dev->of_offset;
+ const char *mode;
+
+ priv->portnr = dev->seq;
+
+ priv->ehci = (struct usb_ehci *)dev_get_addr(dev);
+ mode = fdt_getprop(dt_blob, node, "dr_mode", NULL);
+ if (mode) {
+ if (0 == strcmp(mode, "host")) {
+ priv->dr_mode = DR_MODE_HOST;
+ priv->init_type = USB_INIT_HOST;
+ } else if (0 == strcmp(mode, "peripheral")) {
+ priv->dr_mode = DR_MODE_DEVICE;
+ priv->init_type = USB_INIT_DEVICE;
+ } else if (0 == strcmp(mode, "otg")) {
+ priv->dr_mode = DR_MODE_OTG;
+ /*
+ * We set init_type to device by default when OTG
+ * mode is requested. If a valid gpio is provided
+ * we will switch the init_type based on the state
+ * of the gpio pin.
+ */
+ priv->init_type = USB_INIT_DEVICE;
+ } else {
+ debug("%s: Cannot decode dr_mode '%s'\n",
+ __func__, mode);
+ return -EINVAL;
+ }
+ } else {
+ priv->dr_mode = DR_MODE_HOST;
+ priv->init_type = USB_INIT_HOST;
+ }
+
+ if (priv->dr_mode == DR_MODE_OTG) {
+ gpio_request_by_name_nodev(dt_blob, node, "fsl,cdet-gpio", 0,
+ &priv->cdet_gpio, GPIOD_IS_IN);
+ if (dm_gpio_is_valid(&priv->cdet_gpio)) {
+ if (dm_gpio_get_value(&priv->cdet_gpio))
+ priv->init_type = USB_INIT_DEVICE;
+ else
+ priv->init_type = USB_INIT_HOST;
+ }
+ }
+
+ return 0;
+}
+
+static int vf_init_after_reset(struct ehci_ctrl *dev)
+{
+ struct ehci_vf_priv_data *priv = dev->priv;
+ enum usb_init_type type = priv->init_type;
+ struct usb_ehci *ehci = priv->ehci;
+ int ret;
+
+ ret = ehci_vf_common_init(priv->ehci, priv->portnr);
+ if (ret)
+ return ret;
+
+ if (type == USB_INIT_DEVICE)
+ return 0;
+
+ setbits_le32(&ehci->usbmode, CM_HOST);
+ writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
+ setbits_le32(&ehci->portsc, USB_EN);
+
+ mdelay(10);
+
+ return 0;
+}
+
+static const struct ehci_ops vf_ehci_ops = {
+ .init_after_reset = vf_init_after_reset
+};
+
+static int vf_usb_bind(struct udevice *dev)
+{
+ static int num_controllers;
+
+ /*
+ * Without this hack, if we return ENODEV for USB Controller 0, on
+ * probe for the next controller, USB Controller 1 will be given a
+ * sequence number of 0. This conflicts with our requirement of
+ * sequence numbers while initialising the peripherals.
+ */
+ dev->req_seq = num_controllers;
+ num_controllers++;
+
+ return 0;
+}
+
+static int ehci_usb_probe(struct udevice *dev)
+{
+ struct usb_platdata *plat = dev_get_platdata(dev);
+ struct ehci_vf_priv_data *priv = dev_get_priv(dev);
+ struct usb_ehci *ehci = priv->ehci;
+ struct ehci_hccr *hccr;
+ struct ehci_hcor *hcor;
+ int ret;
+
+ ret = ehci_vf_common_init(ehci, priv->portnr);
+ if (ret)
+ return ret;
+
+ if (priv->init_type != plat->init_type)
+ return -ENODEV;
+
+ if (priv->init_type == USB_INIT_HOST) {
+ setbits_le32(&ehci->usbmode, CM_HOST);
+ writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
+ setbits_le32(&ehci->portsc, USB_EN);
+ }
+
+ mdelay(10);
+
+ hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
+ hcor = (struct ehci_hcor *)((uint32_t)hccr +
+ HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+
+ return ehci_register(dev, hccr, hcor, &vf_ehci_ops, 0, priv->init_type);
+}
+
+static int ehci_usb_remove(struct udevice *dev)
+{
+ int ret;
+
+ ret = ehci_deregister(dev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct udevice_id vf_usb_ids[] = {
+ { .compatible = "fsl,vf610-usb" },
+ { }
+};
+
+U_BOOT_DRIVER(usb_ehci) = {
+ .name = "ehci_vf",
+ .id = UCLASS_USB,
+ .of_match = vf_usb_ids,
+ .bind = vf_usb_bind,
+ .probe = ehci_usb_probe,
+ .remove = ehci_usb_remove,
+ .ops = &ehci_usb_ops,
+ .ofdata_to_platdata = vf_usb_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct usb_platdata),
+ .priv_auto_alloc_size = sizeof(struct ehci_vf_priv_data),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
+#endif
--
2.9.2
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