diff options
Diffstat (limited to 'drivers/usb/dwc2/dwc2.c')
| -rw-r--r-- | drivers/usb/dwc2/dwc2.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/dwc2.c b/drivers/usb/dwc2/dwc2.c new file mode 100644 index 0000000000..a35fd0e717 --- /dev/null +++ b/drivers/usb/dwc2/dwc2.c @@ -0,0 +1,214 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> + * Copyright (C) 2014 Marek Vasut <marex@denx.de> + * + * Copied from u-Boot + */ +#include <common.h> +#include <of.h> +#include <dma.h> +#include <init.h> +#include <errno.h> +#include <driver.h> +#include <linux/clk.h> +#include <linux/reset.h> +#include <of_device.h> + +#include "dwc2.h" + +static void dwc2_set_stm32mp15_fsotg_params(struct dwc2 *dwc2) +{ + struct dwc2_core_params *p = &dwc2->params; + + p->otg_cap &= ~(DWC2_CAP_PARAM_HNP_SRP_CAPABLE + | DWC2_CAP_PARAM_SRP_ONLY_CAPABLE); + p->otg_cap |= DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE; + p->speed = DWC2_SPEED_PARAM_FULL; + p->host_rx_fifo_size = 128; + p->host_nperio_tx_fifo_size = 96; + p->host_perio_tx_fifo_size = 96; + p->max_packet_count = 256; + p->phy_type = DWC2_PHY_TYPE_PARAM_FS; + p->i2c_enable = false; + p->activate_stm_fs_transceiver = true; + p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; + p->power_down = DWC2_POWER_DOWN_PARAM_NONE; + p->host_support_fs_ls_low_power = true; + p->host_ls_low_power_phy_clk = true; +} + +static void dwc2_set_stm32mp15_hsotg_params(struct dwc2 *dwc2) +{ + struct dwc2_core_params *p = &dwc2->params; + + p->otg_cap &= ~(DWC2_CAP_PARAM_HNP_SRP_CAPABLE + | DWC2_CAP_PARAM_SRP_ONLY_CAPABLE); + p->otg_cap |= DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE; + p->host_rx_fifo_size = 440; + p->host_nperio_tx_fifo_size = 256; + p->host_perio_tx_fifo_size = 256; + p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; + p->power_down = DWC2_POWER_DOWN_PARAM_NONE; + p->lpm = false; + p->lpm_clock_gating = false; + p->besl = false; + p->hird_threshold_en = false; +} + +static int dwc2_set_mode(void *ctx, enum usb_dr_mode mode) +{ + struct dwc2 *dwc2 = ctx; + int ret = -ENODEV; + int oldmode = dwc2->dr_mode; + + dwc2->dr_mode = mode; + + if (mode == USB_DR_MODE_HOST || mode == USB_DR_MODE_OTG) { + if (IS_ENABLED(CONFIG_USB_DWC2_HOST)) + ret = dwc2_register_host(dwc2); + else + dwc2_err(dwc2, "Host support not available\n"); + } + if (mode == USB_DR_MODE_PERIPHERAL || mode == USB_DR_MODE_OTG) { + if (IS_ENABLED(CONFIG_USB_DWC2_GADGET)) + ret = dwc2_gadget_init(dwc2); + else + dwc2_err(dwc2, "Peripheral support not available\n"); + } + + if (ret) + dwc2->dr_mode = oldmode; + + return ret; +} + +typedef void (*set_params_cb)(struct dwc2 *dwc2); + +static int dwc2_probe(struct device *dev) +{ + struct resource *iores; + struct dwc2 *dwc2; + set_params_cb set_params; + int ret; + + iores = dev_request_mem_resource(dev, 0); + if (IS_ERR(iores)) + return PTR_ERR(iores); + dwc2 = xzalloc(sizeof(*dwc2)); + dwc2->regs = IOMEM(iores->start); + dwc2->dev = dev; + + dwc2->clk = clk_get(dev, "otg"); + if (IS_ERR(dwc2->clk)) { + ret = PTR_ERR(dwc2->clk); + dev_err(dev, "Failed to get USB clock %d\n", ret); + goto release_region; + } + + ret = clk_enable(dwc2->clk); + if (ret) + goto clk_put; + + ret = device_reset_us(dev, 2); + if (ret) + goto clk_disable; + + dwc2->phy = phy_optional_get(dev, "usb2-phy"); + if (IS_ERR(dwc2->phy)) { + ret = PTR_ERR(dwc2->phy); + goto clk_disable; + } + + ret = phy_power_on(dwc2->phy); + if (ret) + goto clk_disable; + + ret = phy_init(dwc2->phy); + if (ret) + goto phy_power_off; + + ret = dwc2_check_core_version(dwc2); + if (ret) + goto error; + + /* + * Reset before dwc2_get_hwparams() then it could get power-on real + * reset value form registers. + */ + ret = dwc2_core_reset(dwc2); + if (ret) + goto error; + + /* Detect config values from hardware */ + dwc2_get_hwparams(dwc2); + + ret = dwc2_get_dr_mode(dwc2); + if (ret) + goto error; + + dwc2_set_default_params(dwc2); + dwc2_get_device_properties(dwc2); + + set_params = of_device_get_match_data(dev); + if (set_params) + set_params(dwc2); + + dma_set_mask(dev, DMA_BIT_MASK(32)); + dev->priv = dwc2; + + if (dwc2->dr_mode == USB_DR_MODE_OTG) + ret = usb_register_otg_device(dwc2->dev, dwc2_set_mode, dwc2); + else + ret = dwc2_set_mode(dwc2, dwc2->dr_mode); + + if (ret) + goto error; + + return 0; +error: + phy_exit(dwc2->phy); +phy_power_off: + phy_power_off(dwc2->phy); +clk_disable: + clk_disable(dwc2->clk); +clk_put: + clk_put(dwc2->clk); +release_region: + release_region(iores); + + free(dwc2); + + return ret; +} + +static void dwc2_remove(struct device *dev) +{ + struct dwc2 *dwc2 = dev->priv; + + dwc2_host_uninit(dwc2); + dwc2_gadget_uninit(dwc2); + + phy_exit(dwc2->phy); + phy_power_off(dwc2->phy); +} + +static const struct of_device_id dwc2_platform_dt_ids[] = { + { .compatible = "brcm,bcm2835-usb", }, + { .compatible = "brcm,bcm2708-usb", }, + { .compatible = "snps,dwc2", }, + { .compatible = "st,stm32mp15-fsotg", + .data = dwc2_set_stm32mp15_fsotg_params }, + { .compatible = "st,stm32mp15-hsotg", + .data = dwc2_set_stm32mp15_hsotg_params }, + { } +}; +MODULE_DEVICE_TABLE(of, dwc2_platform_dt_ids); + +static struct driver dwc2_driver = { + .name = "dwc2", + .probe = dwc2_probe, + .remove = dwc2_remove, + .of_compatible = DRV_OF_COMPAT(dwc2_platform_dt_ids), +}; +device_platform_driver(dwc2_driver); |