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path: root/drivers/usb/dwc2/platform.c
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Diffstat (limited to 'drivers/usb/dwc2/platform.c')
-rw-r--r--drivers/usb/dwc2/platform.c158
1 files changed, 136 insertions, 22 deletions
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 39c1cbf0e75d..510f787434b3 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -54,11 +54,44 @@
static const char dwc2_driver_name[] = "dwc2";
+static const struct dwc2_core_params params_hi6220 = {
+ .otg_cap = 2, /* No HNP/SRP capable */
+ .otg_ver = 0, /* 1.3 */
+ .dma_enable = 1,
+ .dma_desc_enable = 0,
+ .dma_desc_fs_enable = 0,
+ .speed = 0, /* High Speed */
+ .enable_dynamic_fifo = 1,
+ .en_multiple_tx_fifo = 1,
+ .host_rx_fifo_size = 512,
+ .host_nperio_tx_fifo_size = 512,
+ .host_perio_tx_fifo_size = 512,
+ .max_transfer_size = 65535,
+ .max_packet_count = 511,
+ .host_channels = 16,
+ .phy_type = 1, /* UTMI */
+ .phy_utmi_width = 8,
+ .phy_ulpi_ddr = 0, /* Single */
+ .phy_ulpi_ext_vbus = 0,
+ .i2c_enable = 0,
+ .ulpi_fs_ls = 0,
+ .host_support_fs_ls_low_power = 0,
+ .host_ls_low_power_phy_clk = 0, /* 48 MHz */
+ .ts_dline = 0,
+ .reload_ctl = 0,
+ .ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
+ GAHBCFG_HBSTLEN_SHIFT,
+ .uframe_sched = 0,
+ .external_id_pin_ctl = -1,
+ .hibernation = -1,
+};
+
static const struct dwc2_core_params params_bcm2835 = {
.otg_cap = 0, /* HNP/SRP capable */
.otg_ver = 0, /* 1.3 */
.dma_enable = 1,
.dma_desc_enable = 0,
+ .dma_desc_fs_enable = 0,
.speed = 0, /* High Speed */
.enable_dynamic_fifo = 1,
.en_multiple_tx_fifo = 1,
@@ -89,6 +122,7 @@ static const struct dwc2_core_params params_rk3066 = {
.otg_ver = -1,
.dma_enable = -1,
.dma_desc_enable = 0,
+ .dma_desc_fs_enable = 0,
.speed = -1,
.enable_dynamic_fifo = 1,
.en_multiple_tx_fifo = -1,
@@ -115,6 +149,71 @@ static const struct dwc2_core_params params_rk3066 = {
.hibernation = -1,
};
+/*
+ * Check the dr_mode against the module configuration and hardware
+ * capabilities.
+ *
+ * The hardware, module, and dr_mode, can each be set to host, device,
+ * or otg. Check that all these values are compatible and adjust the
+ * value of dr_mode if possible.
+ *
+ * actual
+ * HW MOD dr_mode dr_mode
+ * ------------------------------
+ * HST HST any : HST
+ * HST DEV any : ---
+ * HST OTG any : HST
+ *
+ * DEV HST any : ---
+ * DEV DEV any : DEV
+ * DEV OTG any : DEV
+ *
+ * OTG HST any : HST
+ * OTG DEV any : DEV
+ * OTG OTG any : dr_mode
+ */
+static int dwc2_get_dr_mode(struct dwc2_hsotg *hsotg)
+{
+ enum usb_dr_mode mode;
+
+ hsotg->dr_mode = usb_get_dr_mode(hsotg->dev);
+ if (hsotg->dr_mode == USB_DR_MODE_UNKNOWN)
+ hsotg->dr_mode = USB_DR_MODE_OTG;
+
+ mode = hsotg->dr_mode;
+
+ if (dwc2_hw_is_device(hsotg)) {
+ if (IS_ENABLED(CONFIG_USB_DWC2_HOST)) {
+ dev_err(hsotg->dev,
+ "Controller does not support host mode.\n");
+ return -EINVAL;
+ }
+ mode = USB_DR_MODE_PERIPHERAL;
+ } else if (dwc2_hw_is_host(hsotg)) {
+ if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL)) {
+ dev_err(hsotg->dev,
+ "Controller does not support device mode.\n");
+ return -EINVAL;
+ }
+ mode = USB_DR_MODE_HOST;
+ } else {
+ if (IS_ENABLED(CONFIG_USB_DWC2_HOST))
+ mode = USB_DR_MODE_HOST;
+ else if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL))
+ mode = USB_DR_MODE_PERIPHERAL;
+ }
+
+ if (mode != hsotg->dr_mode) {
+ dev_warn(hsotg->dev,
+ "Configuration mismatch. dr_mode forced to %s\n",
+ mode == USB_DR_MODE_HOST ? "host" : "device");
+
+ hsotg->dr_mode = mode;
+ }
+
+ return 0;
+}
+
static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
{
struct platform_device *pdev = to_platform_device(hsotg->dev);
@@ -306,8 +405,28 @@ static int dwc2_driver_remove(struct platform_device *dev)
return 0;
}
+/**
+ * dwc2_driver_shutdown() - Called on device shutdown
+ *
+ * @dev: Platform device
+ *
+ * In specific conditions (involving usb hubs) dwc2 devices can create a
+ * lot of interrupts, even to the point of overwhelming devices running
+ * at low frequencies. Some devices need to do special clock handling
+ * at shutdown-time which may bring the system clock below the threshold
+ * of being able to handle the dwc2 interrupts. Disabling dwc2-irqs
+ * prevents reboots/poweroffs from getting stuck in such cases.
+ */
+static void dwc2_driver_shutdown(struct platform_device *dev)
+{
+ struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
+
+ disable_irq(hsotg->irq);
+}
+
static const struct of_device_id dwc2_of_match_table[] = {
{ .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
+ { .compatible = "hisilicon,hi6220-usb", .data = &params_hi6220 },
{ .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
{ .compatible = "snps,dwc2", .data = NULL },
{ .compatible = "samsung,s3c6400-hsotg", .data = NULL},
@@ -335,7 +454,6 @@ static int dwc2_driver_probe(struct platform_device *dev)
struct dwc2_hsotg *hsotg;
struct resource *res;
int retval;
- int irq;
match = of_match_device(dwc2_of_match_table, &dev->dev);
if (match && match->data) {
@@ -348,8 +466,10 @@ static int dwc2_driver_probe(struct platform_device *dev)
/*
* Disable descriptor dma mode by default as the HW can support
* it, but does not support it for SPLIT transactions.
+ * Disable it for FS devices as well.
*/
defparams.dma_desc_enable = 0;
+ defparams.dma_desc_fs_enable = 0;
}
hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
@@ -375,19 +495,6 @@ static int dwc2_driver_probe(struct platform_device *dev)
dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
(unsigned long)res->start, hsotg->regs);
- hsotg->dr_mode = usb_get_dr_mode(&dev->dev);
- if (IS_ENABLED(CONFIG_USB_DWC2_HOST) &&
- hsotg->dr_mode != USB_DR_MODE_HOST) {
- hsotg->dr_mode = USB_DR_MODE_HOST;
- dev_warn(hsotg->dev,
- "Configuration mismatch. Forcing host mode\n");
- } else if (IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) &&
- hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
- hsotg->dr_mode = USB_DR_MODE_PERIPHERAL;
- dev_warn(hsotg->dev,
- "Configuration mismatch. Forcing peripheral mode\n");
- }
-
retval = dwc2_lowlevel_hw_init(hsotg);
if (retval)
return retval;
@@ -401,15 +508,15 @@ static int dwc2_driver_probe(struct platform_device *dev)
dwc2_set_all_params(hsotg->core_params, -1);
- irq = platform_get_irq(dev, 0);
- if (irq < 0) {
+ hsotg->irq = platform_get_irq(dev, 0);
+ if (hsotg->irq < 0) {
dev_err(&dev->dev, "missing IRQ resource\n");
- return irq;
+ return hsotg->irq;
}
dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
- irq);
- retval = devm_request_irq(hsotg->dev, irq,
+ hsotg->irq);
+ retval = devm_request_irq(hsotg->dev, hsotg->irq,
dwc2_handle_common_intr, IRQF_SHARED,
dev_name(hsotg->dev), hsotg);
if (retval)
@@ -419,7 +526,11 @@ static int dwc2_driver_probe(struct platform_device *dev)
if (retval)
return retval;
- /* Detect config values from hardware */
+ retval = dwc2_get_dr_mode(hsotg);
+ if (retval)
+ return retval;
+
+ /* Reset the controller and detect hardware config values */
retval = dwc2_get_hwparams(hsotg);
if (retval)
goto error;
@@ -427,15 +538,17 @@ static int dwc2_driver_probe(struct platform_device *dev)
/* Validate parameter values */
dwc2_set_parameters(hsotg, params);
+ dwc2_force_dr_mode(hsotg);
+
if (hsotg->dr_mode != USB_DR_MODE_HOST) {
- retval = dwc2_gadget_init(hsotg, irq);
+ retval = dwc2_gadget_init(hsotg, hsotg->irq);
if (retval)
goto error;
hsotg->gadget_enabled = 1;
}
if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
- retval = dwc2_hcd_init(hsotg, irq);
+ retval = dwc2_hcd_init(hsotg, hsotg->irq);
if (retval) {
if (hsotg->gadget_enabled)
dwc2_hsotg_remove(hsotg);
@@ -502,6 +615,7 @@ static struct platform_driver dwc2_platform_driver = {
},
.probe = dwc2_driver_probe,
.remove = dwc2_driver_remove,
+ .shutdown = dwc2_driver_shutdown,
};
module_platform_driver(dwc2_platform_driver);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.