/**
* During device initialization, read various hardware configuration
* registers and interpret the contents.
*/
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;
/*
* Attempt to ensure this device is really a DWC_otg Controller.
* Read and verify the GSNPSID register contents. The value should be
* 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
* as in "OTG version 2.xx" or "OTG version 3.xx".
*/
hw->snpsid = dwc2_readl(hsotg->regs + GSNPSID);
if ((hw->snpsid & 0xfffff000) != 0x4f542000 &&
(hw->snpsid & 0xfffff000) != 0x4f543000 &&
(hw->snpsid & 0xffff0000) != 0x55310000 &&
(hw->snpsid & 0xffff0000) != 0x55320000) {
dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
hw->snpsid);
return -ENODEV;
}
dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
hwcfg1 = dwc2_readl(hsotg->regs + GHWCFG1);
hwcfg2 = dwc2_readl(hsotg->regs + GHWCFG2);
hwcfg3 = dwc2_readl(hsotg->regs + GHWCFG3);
hwcfg4 = dwc2_readl(hsotg->regs + GHWCFG4);
grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hwcfg1);
dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hwcfg2);
dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hwcfg3);
dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hwcfg4);
dev_dbg(hsotg->dev, "grxfsiz=%08x\n", grxfsiz);
/*
* 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);
/* 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;
/* 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->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
/* fifo sizes */
hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
GRXFSIZ_DEPTH_SHIFT;
dev_dbg(hsotg->dev, "Detected values from hardware:\n");
dev_dbg(hsotg->dev, " op_mode=%d\n",
hw->op_mode);
dev_dbg(hsotg->dev, " arch=%d\n",
hw->arch);
dev_dbg(hsotg->dev, " dma_desc_enable=%d\n",
hw->dma_desc_enable);
dev_dbg(hsotg->dev, " power_optimized=%d\n",
hw->power_optimized);
dev_dbg(hsotg->dev, " i2c_enable=%d\n",
hw->i2c_enable);
dev_dbg(hsotg->dev, " hs_phy_type=%d\n",
hw->hs_phy_type);
dev_dbg(hsotg->dev, " fs_phy_type=%d\n",
hw->fs_phy_type);
dev_dbg(hsotg->dev, " utmi_phy_data_width=%d\n",
hw->utmi_phy_data_width);
dev_dbg(hsotg->dev, " num_dev_ep=%d\n",
hw->num_dev_ep);
dev_dbg(hsotg->dev, " num_dev_perio_in_ep=%d\n",
hw->num_dev_perio_in_ep);
dev_dbg(hsotg->dev, " host_channels=%d\n",
hw->host_channels);
dev_dbg(hsotg->dev, " max_transfer_size=%d\n",
hw->max_transfer_size);
dev_dbg(hsotg->dev, " max_packet_count=%d\n",
hw->max_packet_count);
dev_dbg(hsotg->dev, " nperio_tx_q_depth=0x%0x\n",
hw->nperio_tx_q_depth);
dev_dbg(hsotg->dev, " host_perio_tx_q_depth=0x%0x\n",
hw->host_perio_tx_q_depth);
dev_dbg(hsotg->dev, " dev_token_q_depth=0x%0x\n",
hw->dev_token_q_depth);
dev_dbg(hsotg->dev, " enable_dynamic_fifo=%d\n",
hw->enable_dynamic_fifo);
dev_dbg(hsotg->dev, " en_multiple_tx_fifo=%d\n",
hw->en_multiple_tx_fifo);
dev_dbg(hsotg->dev, " total_fifo_size=%d\n",
hw->total_fifo_size);
dev_dbg(hsotg->dev, " rx_fifo_size=%d\n",
hw->rx_fifo_size);
dev_dbg(hsotg->dev, " host_nperio_tx_fifo_size=%d\n",
hw->host_nperio_tx_fifo_size);
dev_dbg(hsotg->dev, " host_perio_tx_fifo_size=%d\n",
hw->host_perio_tx_fifo_size);
dev_dbg(hsotg->dev, "\n");
return 0;
}
/**
* 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;
/*
* Attempt to ensure this device is really a DWC_otg Controller.
* Read and verify the GSNPSID register contents. The value should be
* 0x45f4xxxx, 0x5531xxxx or 0x5532xxxx
*/
hw->snpsid = dwc2_readl(hsotg, GSNPSID);
if ((hw->snpsid & GSNPSID_ID_MASK) != DWC2_OTG_ID &&
(hw->snpsid & GSNPSID_ID_MASK) != DWC2_FS_IOT_ID &&
(hw->snpsid & GSNPSID_ID_MASK) != DWC2_HS_IOT_ID) {
dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
hw->snpsid);
return -ENODEV;
}
dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
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;
}
