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linux/drivers/usb/dwc2/params.c
Stefan Wahren f3b311325f Revert "usb: dwc2: Skip clock gating on Broadcom SoCs" 
The commit d483f034f0 ("usb: dwc2: Skip clock gating on Broadcom SoCs")
introduced a regression on Raspberry Pi 3 B Plus, which prevents
enumeration of the onboard Microchip LAN7800 in case no external USB device
is connected during boot.

Fixes: d483f034f0 ("usb: dwc2: Skip clock gating on Broadcom SoCs")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20241025103621.4780-2-wahrenst@gmx.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-10-29 04:24:54 +01:00

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// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* Copyright (C) 2004-2016 Synopsys, Inc.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/usb/of.h>
#include <linux/pci_ids.h>
#include <linux/pci.h>
#include "core.h"
#define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
#define PCI_DEVICE_ID_LOONGSON_DWC2 0x7a04
static void dwc2_set_bcm_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->host_rx_fifo_size = 774;
p->max_transfer_size = 65535;
p->max_packet_count = 511;
p->ahbcfg = 0x10;
}
static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->host_rx_fifo_size = 512;
p->host_nperio_tx_fifo_size = 512;
p->host_perio_tx_fifo_size = 512;
p->max_transfer_size = 65535;
p->max_packet_count = 511;
p->host_channels = 16;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->phy_utmi_width = 8;
p->i2c_enable = false;
p->reload_ctl = false;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
GAHBCFG_HBSTLEN_SHIFT;
p->change_speed_quirk = true;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
}
static void dwc2_set_jz4775_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->phy_utmi_width = 16;
p->activate_ingenic_overcurrent_detection =
!device_property_read_bool(hsotg->dev, "disable-over-current");
}
static void dwc2_set_loongson_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->phy_utmi_width = 8;
p->power_down = DWC2_POWER_DOWN_PARAM_PARTIAL;
}
static void dwc2_set_x1600_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->host_channels = 16;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->phy_utmi_width = 16;
p->activate_ingenic_overcurrent_detection =
!device_property_read_bool(hsotg->dev, "disable-over-current");
}
static void dwc2_set_x2000_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->host_rx_fifo_size = 1024;
p->host_nperio_tx_fifo_size = 1024;
p->host_perio_tx_fifo_size = 1024;
p->host_channels = 16;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->phy_utmi_width = 16;
p->activate_ingenic_overcurrent_detection =
!device_property_read_bool(hsotg->dev, "disable-over-current");
}
static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
p->no_clock_gating = true;
p->phy_utmi_width = 8;
}
static void dwc2_set_socfpga_agilex_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
p->no_clock_gating = true;
}
static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->host_rx_fifo_size = 525;
p->host_nperio_tx_fifo_size = 128;
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;
p->no_clock_gating = true;
}
static void dwc2_set_ltq_danube_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
}
static void dwc2_set_ltq_ase_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->host_rx_fifo_size = 288;
p->host_nperio_tx_fifo_size = 128;
p->host_perio_tx_fifo_size = 96;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
GAHBCFG_HBSTLEN_SHIFT;
}
static void dwc2_set_ltq_xrx200_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->host_rx_fifo_size = 288;
p->host_nperio_tx_fifo_size = 128;
p->host_perio_tx_fifo_size = 136;
}
static void dwc2_set_amlogic_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->host_rx_fifo_size = 512;
p->host_nperio_tx_fifo_size = 500;
p->host_perio_tx_fifo_size = 500;
p->host_channels = 16;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 <<
GAHBCFG_HBSTLEN_SHIFT;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
}
static void dwc2_set_amlogic_g12a_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->lpm = false;
p->lpm_clock_gating = false;
p->besl = false;
p->hird_threshold_en = false;
}
static void dwc2_set_amlogic_a1_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->host_rx_fifo_size = 192;
p->host_nperio_tx_fifo_size = 128;
p->host_perio_tx_fifo_size = 128;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->phy_utmi_width = 8;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 << GAHBCFG_HBSTLEN_SHIFT;
p->lpm = false;
p->lpm_clock_gating = false;
p->besl = false;
p->hird_threshold_en = false;
}
static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
}
static void dwc2_set_cv1800_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->host_dma = false;
p->g_dma = false;
p->speed = DWC2_SPEED_PARAM_HIGH;
p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
p->phy_utmi_width = 16;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
p->lpm = false;
p->lpm_clock_gating = false;
p->besl = false;
p->hird_threshold_en = false;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
}
static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
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;
}
static void dwc2_set_stm32f7_hsotg_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->host_rx_fifo_size = 622;
p->host_nperio_tx_fifo_size = 128;
p->host_perio_tx_fifo_size = 256;
}
static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->otg_caps.otg_rev = 0x200;
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->activate_stm_id_vb_detection = 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_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->otg_caps.hnp_support = false;
p->otg_caps.srp_support = false;
p->otg_caps.otg_rev = 0x200;
p->activate_stm_id_vb_detection = !device_property_read_bool(hsotg->dev, "usb-role-switch");
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;
}
const struct of_device_id dwc2_of_match_table[] = {
{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
{ .compatible = "ingenic,jz4775-otg", .data = dwc2_set_jz4775_params },
{ .compatible = "ingenic,jz4780-otg", .data = dwc2_set_jz4775_params },
{ .compatible = "ingenic,x1000-otg", .data = dwc2_set_jz4775_params },
{ .compatible = "ingenic,x1600-otg", .data = dwc2_set_x1600_params },
{ .compatible = "ingenic,x1700-otg", .data = dwc2_set_x1600_params },
{ .compatible = "ingenic,x1830-otg", .data = dwc2_set_x1600_params },
{ .compatible = "ingenic,x2000-otg", .data = dwc2_set_x2000_params },
{ .compatible = "rockchip,rk3066-usb", .data = dwc2_set_rk_params },
{ .compatible = "lantiq,danube-usb", .data = &dwc2_set_ltq_danube_params },
{ .compatible = "lantiq,ase-usb", .data = &dwc2_set_ltq_ase_params },
{ .compatible = "lantiq,arx100-usb", .data = &dwc2_set_ltq_ase_params },
{ .compatible = "lantiq,xrx200-usb", .data = &dwc2_set_ltq_xrx200_params },
{ .compatible = "lantiq,xrx300-usb", .data = &dwc2_set_ltq_xrx200_params },
{ .compatible = "snps,dwc2" },
{ .compatible = "samsung,s3c6400-hsotg",
.data = dwc2_set_s3c6400_params },
{ .compatible = "amlogic,meson8-usb",
.data = dwc2_set_amlogic_params },
{ .compatible = "amlogic,meson8b-usb",
.data = dwc2_set_amlogic_params },
{ .compatible = "amlogic,meson-gxbb-usb",
.data = dwc2_set_amlogic_params },
{ .compatible = "amlogic,meson-g12a-usb",
.data = dwc2_set_amlogic_g12a_params },
{ .compatible = "amlogic,meson-a1-usb",
.data = dwc2_set_amlogic_a1_params },
{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
{ .compatible = "apm,apm82181-dwc-otg", .data = dwc2_set_amcc_params },
{ .compatible = "sophgo,cv1800-usb",
.data = dwc2_set_cv1800_params },
{ .compatible = "st,stm32f4x9-fsotg",
.data = dwc2_set_stm32f4x9_fsotg_params },
{ .compatible = "st,stm32f4x9-hsotg" },
{ .compatible = "st,stm32f7-hsotg",
.data = dwc2_set_stm32f7_hsotg_params },
{ .compatible = "st,stm32mp15-fsotg",
.data = dwc2_set_stm32mp15_fsotg_params },
{ .compatible = "st,stm32mp15-hsotg",
.data = dwc2_set_stm32mp15_hsotg_params },
{ .compatible = "intel,socfpga-agilex-hsotg",
.data = dwc2_set_socfpga_agilex_params },
{},
};
MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
const struct acpi_device_id dwc2_acpi_match[] = {
/* This ID refers to the same USB IP as of_device_id brcm,bcm2835-usb */
{ "BCM2848", (kernel_ulong_t)dwc2_set_bcm_params },
{ },
};
MODULE_DEVICE_TABLE(acpi, dwc2_acpi_match);
const struct pci_device_id dwc2_pci_ids[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
},
{
PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
PCI_DEVICE_ID_STMICRO_USB_OTG),
},
{
PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, PCI_DEVICE_ID_LOONGSON_DWC2),
.driver_data = (unsigned long)dwc2_set_loongson_params,
},
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
EXPORT_SYMBOL_GPL(dwc2_pci_ids);
static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg)
{
switch (hsotg->hw_params.op_mode) {
case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
hsotg->params.otg_caps.hnp_support = true;
hsotg->params.otg_caps.srp_support = true;
break;
case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
hsotg->params.otg_caps.hnp_support = false;
hsotg->params.otg_caps.srp_support = true;
break;
default:
hsotg->params.otg_caps.hnp_support = false;
hsotg->params.otg_caps.srp_support = false;
break;
}
}
static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg)
{
int val;
u32 hs_phy_type = hsotg->hw_params.hs_phy_type;
val = DWC2_PHY_TYPE_PARAM_FS;
if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
val = DWC2_PHY_TYPE_PARAM_UTMI;
else
val = DWC2_PHY_TYPE_PARAM_ULPI;
}
if (dwc2_is_fs_iot(hsotg))
hsotg->params.phy_type = DWC2_PHY_TYPE_PARAM_FS;
hsotg->params.phy_type = val;
}
static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg)
{
int val;
val = hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS ?
DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
if (dwc2_is_fs_iot(hsotg))
val = DWC2_SPEED_PARAM_FULL;
if (dwc2_is_hs_iot(hsotg))
val = DWC2_SPEED_PARAM_HIGH;
hsotg->params.speed = val;
}
static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
{
int val;
val = (hsotg->hw_params.utmi_phy_data_width ==
GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
if (hsotg->phy) {
/*
* If using the generic PHY framework, check if the PHY bus
* width is 8-bit and set the phyif appropriately.
*/
if (phy_get_bus_width(hsotg->phy) == 8)
val = 8;
}
hsotg->params.phy_utmi_width = val;
}
static void dwc2_set_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
int depth_average;
int fifo_count;
int i;
fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
memset(p->g_tx_fifo_size, 0, sizeof(p->g_tx_fifo_size));
depth_average = dwc2_hsotg_tx_fifo_average_depth(hsotg);
for (i = 1; i <= fifo_count; i++)
p->g_tx_fifo_size[i] = depth_average;
}
static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
{
int val;
if (hsotg->hw_params.hibernation)
val = DWC2_POWER_DOWN_PARAM_HIBERNATION;
else if (hsotg->hw_params.power_optimized)
val = DWC2_POWER_DOWN_PARAM_PARTIAL;
else
val = DWC2_POWER_DOWN_PARAM_NONE;
hsotg->params.power_down = val;
}
static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
p->lpm = hsotg->hw_params.lpm_mode;
if (p->lpm) {
p->lpm_clock_gating = true;
p->besl = true;
p->hird_threshold_en = true;
p->hird_threshold = 4;
} else {
p->lpm_clock_gating = false;
p->besl = false;
p->hird_threshold_en = false;
}
}
/**
* dwc2_set_default_params() - Set all core parameters to their
* auto-detected default values.
*
* @hsotg: Programming view of the DWC_otg controller
*
*/
static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_hw_params *hw = &hsotg->hw_params;
struct dwc2_core_params *p = &hsotg->params;
bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
dwc2_set_param_otg_cap(hsotg);
dwc2_set_param_phy_type(hsotg);
dwc2_set_param_speed(hsotg);
dwc2_set_param_phy_utmi_width(hsotg);
dwc2_set_param_power_down(hsotg);
dwc2_set_param_lpm(hsotg);
p->phy_ulpi_ddr = false;
p->phy_ulpi_ext_vbus = false;
p->eusb2_disc = false;
p->enable_dynamic_fifo = hw->enable_dynamic_fifo;
p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
p->i2c_enable = hw->i2c_enable;
p->acg_enable = hw->acg_enable;
p->ulpi_fs_ls = false;
p->ts_dline = false;
p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
p->uframe_sched = true;
p->external_id_pin_ctl = false;
p->ipg_isoc_en = false;
p->service_interval = false;
p->max_packet_count = hw->max_packet_count;
p->max_transfer_size = hw->max_transfer_size;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
p->ref_clk_per = 33333;
p->sof_cnt_wkup_alert = 100;
if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
p->host_dma = dma_capable;
p->dma_desc_enable = false;
p->dma_desc_fs_enable = false;
p->host_support_fs_ls_low_power = false;
p->host_ls_low_power_phy_clk = false;
p->host_channels = hw->host_channels;
p->host_rx_fifo_size = hw->rx_fifo_size;
p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
}
if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
p->g_dma = dma_capable;
p->g_dma_desc = hw->dma_desc_enable;
/*
* The values for g_rx_fifo_size (2048) and
* g_np_tx_fifo_size (1024) come from the legacy s3c
* gadget driver. These defaults have been hard-coded
* for some time so many platforms depend on these
* values. Leave them as defaults for now and only
* auto-detect if the hardware does not support the
* default.
*/
p->g_rx_fifo_size = 2048;
p->g_np_tx_fifo_size = 1024;
dwc2_set_param_tx_fifo_sizes(hsotg);
}
}
/**
* dwc2_get_device_properties() - Read in device properties.
*
* @hsotg: Programming view of the DWC_otg controller
*
* Read in the device properties and adjust core parameters if needed.
*/
static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
int num;
if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
&p->g_rx_fifo_size);
device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
&p->g_np_tx_fifo_size);
num = device_property_count_u32(hsotg->dev, "g-tx-fifo-size");
if (num > 0) {
num = min(num, 15);
memset(p->g_tx_fifo_size, 0,
sizeof(p->g_tx_fifo_size));
device_property_read_u32_array(hsotg->dev,
"g-tx-fifo-size",
&p->g_tx_fifo_size[1],
num);
}
of_usb_update_otg_caps(hsotg->dev->of_node, &p->otg_caps);
}
p->oc_disable = of_property_read_bool(hsotg->dev->of_node, "disable-over-current");
}
static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
{
int valid = 1;
if (hsotg->params.otg_caps.hnp_support && hsotg->params.otg_caps.srp_support) {
/* check HNP && SRP capable */
if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
valid = 0;
} else if (!hsotg->params.otg_caps.hnp_support) {
/* check SRP only capable */
if (hsotg->params.otg_caps.srp_support) {
switch (hsotg->hw_params.op_mode) {
case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
break;
default:
valid = 0;
break;
}
}
/* else: NO HNP && NO SRP capable: always valid */
} else {
valid = 0;
}
if (!valid)
dwc2_set_param_otg_cap(hsotg);
}
static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
{
int valid = 0;
u32 hs_phy_type;
u32 fs_phy_type;
hs_phy_type = hsotg->hw_params.hs_phy_type;
fs_phy_type = hsotg->hw_params.fs_phy_type;
switch (hsotg->params.phy_type) {
case DWC2_PHY_TYPE_PARAM_FS:
if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
valid = 1;
break;
case DWC2_PHY_TYPE_PARAM_UTMI:
if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
(hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
valid = 1;
break;
case DWC2_PHY_TYPE_PARAM_ULPI:
if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
(hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
valid = 1;
break;
default:
break;
}
if (!valid)
dwc2_set_param_phy_type(hsotg);
}
static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
{
int valid = 1;
int phy_type = hsotg->params.phy_type;
int speed = hsotg->params.speed;
switch (speed) {
case DWC2_SPEED_PARAM_HIGH:
if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
(phy_type == DWC2_PHY_TYPE_PARAM_FS))
valid = 0;
break;
case DWC2_SPEED_PARAM_FULL:
case DWC2_SPEED_PARAM_LOW:
break;
default:
valid = 0;
break;
}
if (!valid)
dwc2_set_param_speed(hsotg);
}
static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
{
int valid = 0;
int param = hsotg->params.phy_utmi_width;
int width = hsotg->hw_params.utmi_phy_data_width;
switch (width) {
case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
valid = (param == 8);
break;
case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
valid = (param == 16);
break;
case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
valid = (param == 8 || param == 16);
break;
}
if (!valid)
dwc2_set_param_phy_utmi_width(hsotg);
}
static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
{
int param = hsotg->params.power_down;
switch (param) {
case DWC2_POWER_DOWN_PARAM_NONE:
break;
case DWC2_POWER_DOWN_PARAM_PARTIAL:
if (hsotg->hw_params.power_optimized)
break;
dev_dbg(hsotg->dev,
"Partial power down isn't supported by HW\n");
param = DWC2_POWER_DOWN_PARAM_NONE;
break;
case DWC2_POWER_DOWN_PARAM_HIBERNATION:
if (hsotg->hw_params.hibernation)
break;
dev_dbg(hsotg->dev,
"Hibernation isn't supported by HW\n");
param = DWC2_POWER_DOWN_PARAM_NONE;
break;
default:
dev_err(hsotg->dev,
"%s: Invalid parameter power_down=%d\n",
__func__, param);
param = DWC2_POWER_DOWN_PARAM_NONE;
break;
}
hsotg->params.power_down = param;
}
static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
{
int fifo_count;
int fifo;
int min;
u32 total = 0;
u32 dptxfszn;
fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
for (fifo = 1; fifo <= fifo_count; fifo++)
total += hsotg->params.g_tx_fifo_size[fifo];
if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
__func__);
dwc2_set_param_tx_fifo_sizes(hsotg);
}
for (fifo = 1; fifo <= fifo_count; fifo++) {
dptxfszn = hsotg->hw_params.g_tx_fifo_size[fifo];
if (hsotg->params.g_tx_fifo_size[fifo] < min ||
hsotg->params.g_tx_fifo_size[fifo] > dptxfszn) {
dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
__func__, fifo,
hsotg->params.g_tx_fifo_size[fifo]);
hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
}
}
}
static void dwc2_check_param_eusb2_disc(struct dwc2_hsotg *hsotg)
{
u32 gsnpsid;
if (!hsotg->params.eusb2_disc)
return;
gsnpsid = dwc2_readl(hsotg, GSNPSID);
/*
* eusb2_disc not supported by FS IOT devices.
* For other cores, it supported starting from version 5.00a
*/
if ((gsnpsid & ~DWC2_CORE_REV_MASK) == DWC2_FS_IOT_ID ||
(gsnpsid & DWC2_CORE_REV_MASK) <
(DWC2_CORE_REV_5_00a & DWC2_CORE_REV_MASK)) {
hsotg->params.eusb2_disc = false;
return;
}
}
#define CHECK_RANGE(_param, _min, _max, _def) do { \
if ((int)(hsotg->params._param) < (_min) || \
(hsotg->params._param) > (_max)) { \
dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
__func__, #_param, hsotg->params._param); \
hsotg->params._param = (_def); \
} \
} while (0)
#define CHECK_BOOL(_param, _check) do { \
if (hsotg->params._param && !(_check)) { \
dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
__func__, #_param, hsotg->params._param); \
hsotg->params._param = false; \
} \
} while (0)
static void dwc2_check_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_hw_params *hw = &hsotg->hw_params;
struct dwc2_core_params *p = &hsotg->params;
bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
dwc2_check_param_otg_cap(hsotg);
dwc2_check_param_phy_type(hsotg);
dwc2_check_param_speed(hsotg);
dwc2_check_param_phy_utmi_width(hsotg);
dwc2_check_param_power_down(hsotg);
dwc2_check_param_eusb2_disc(hsotg);
CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
CHECK_BOOL(i2c_enable, hw->i2c_enable);
CHECK_BOOL(ipg_isoc_en, hw->ipg_isoc_en);
CHECK_BOOL(acg_enable, hw->acg_enable);
CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a));
CHECK_BOOL(lpm, hw->lpm_mode);
CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm);
CHECK_BOOL(besl, hsotg->params.lpm);
CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a));
CHECK_BOOL(hird_threshold_en, hsotg->params.lpm);
CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0);
CHECK_BOOL(service_interval, hw->service_interval_mode);
CHECK_RANGE(max_packet_count,
15, hw->max_packet_count,
hw->max_packet_count);
CHECK_RANGE(max_transfer_size,
2047, hw->max_transfer_size,
hw->max_transfer_size);
if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
CHECK_BOOL(host_dma, dma_capable);
CHECK_BOOL(dma_desc_enable, p->host_dma);
CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
CHECK_BOOL(host_ls_low_power_phy_clk,
p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
CHECK_RANGE(host_channels,
1, hw->host_channels,
hw->host_channels);
CHECK_RANGE(host_rx_fifo_size,
16, hw->rx_fifo_size,
hw->rx_fifo_size);
CHECK_RANGE(host_nperio_tx_fifo_size,
16, hw->host_nperio_tx_fifo_size,
hw->host_nperio_tx_fifo_size);
CHECK_RANGE(host_perio_tx_fifo_size,
16, hw->host_perio_tx_fifo_size,
hw->host_perio_tx_fifo_size);
}
if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
CHECK_BOOL(g_dma, dma_capable);
CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
CHECK_RANGE(g_rx_fifo_size,
16, hw->rx_fifo_size,
hw->rx_fifo_size);
CHECK_RANGE(g_np_tx_fifo_size,
16, hw->dev_nperio_tx_fifo_size,
hw->dev_nperio_tx_fifo_size);
dwc2_check_param_tx_fifo_sizes(hsotg);
}
}
/*
* Gets host hardware parameters. Forces host mode if not currently in
* host mode. Should be called immediately after a core soft reset in
* order to get the reset values.
*/
static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
{
struct dwc2_hw_params *hw = &hsotg->hw_params;
u32 gnptxfsiz;
u32 hptxfsiz;
if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
return;
dwc2_force_mode(hsotg, true);
gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
hptxfsiz = dwc2_readl(hsotg, HPTXFSIZ);
hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
FIFOSIZE_DEPTH_SHIFT;
hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
FIFOSIZE_DEPTH_SHIFT;
}
/*
* Gets device hardware parameters. Forces device mode if not
* currently in device mode. Should be called immediately after a core
* soft reset in order to get the reset values.
*/
static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
{
struct dwc2_hw_params *hw = &hsotg->hw_params;
u32 gnptxfsiz;
int fifo, fifo_count;
if (hsotg->dr_mode == USB_DR_MODE_HOST)
return;
dwc2_force_mode(hsotg, false);
gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
for (fifo = 1; fifo <= fifo_count; fifo++) {
hw->g_tx_fifo_size[fifo] =
(dwc2_readl(hsotg, DPTXFSIZN(fifo)) &
FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
}
hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
FIFOSIZE_DEPTH_SHIFT;
}
/**
* dwc2_get_hwparams() - During device initialization, read various hardware
* configuration registers and interpret the contents.
*
* @hsotg: Programming view of the DWC_otg controller
*
*/
int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
{
struct dwc2_hw_params *hw = &hsotg->hw_params;
unsigned int width;
u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
u32 grxfsiz;
hwcfg1 = dwc2_readl(hsotg, GHWCFG1);
hwcfg2 = dwc2_readl(hsotg, GHWCFG2);
hwcfg3 = dwc2_readl(hsotg, GHWCFG3);
hwcfg4 = dwc2_readl(hsotg, GHWCFG4);
grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
/* hwcfg1 */
hw->dev_ep_dirs = hwcfg1;
/* hwcfg2 */
hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
GHWCFG2_OP_MODE_SHIFT;
hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
GHWCFG2_ARCHITECTURE_SHIFT;
hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
GHWCFG2_NUM_HOST_CHAN_SHIFT);
hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
GHWCFG2_HS_PHY_TYPE_SHIFT;
hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
GHWCFG2_FS_PHY_TYPE_SHIFT;
hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
GHWCFG2_NUM_DEV_EP_SHIFT;
hw->nperio_tx_q_depth =
(hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
hw->host_perio_tx_q_depth =
(hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
hw->dev_token_q_depth =
(hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
/* hwcfg3 */
width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
hw->max_transfer_size = (1 << (width + 11)) - 1;
width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
hw->max_packet_count = (1 << (width + 4)) - 1;
hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
GHWCFG3_DFIFO_DEPTH_SHIFT;
hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN);
/* hwcfg4 */
hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
hw->num_dev_in_eps = (hwcfg4 & GHWCFG4_NUM_IN_EPS_MASK) >>
GHWCFG4_NUM_IN_EPS_SHIFT;
hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);
hw->ipg_isoc_en = !!(hwcfg4 & GHWCFG4_IPG_ISOC_SUPPORTED);
hw->service_interval_mode = !!(hwcfg4 &
GHWCFG4_SERVICE_INTERVAL_SUPPORTED);
/* fifo sizes */
hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
GRXFSIZ_DEPTH_SHIFT;
/*
* Host specific hardware parameters. Reading these parameters
* requires the controller to be in host mode. The mode will
* be forced, if necessary, to read these values.
*/
dwc2_get_host_hwparams(hsotg);
dwc2_get_dev_hwparams(hsotg);
return 0;
}
typedef void (*set_params_cb)(struct dwc2_hsotg *data);
int dwc2_init_params(struct dwc2_hsotg *hsotg)
{
set_params_cb set_params;
dwc2_set_default_params(hsotg);
dwc2_get_device_properties(hsotg);
set_params = device_get_match_data(hsotg->dev);
if (set_params) {
set_params(hsotg);
} else {
const struct pci_device_id *pmatch =
pci_match_id(dwc2_pci_ids, to_pci_dev(hsotg->dev->parent));
if (pmatch && pmatch->driver_data) {
set_params = (set_params_cb)pmatch->driver_data;
set_params(hsotg);
}
}
dwc2_check_params(hsotg);
return 0;
}
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