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kernel_linux
提交 b02038fa 编写于 作者: J John Youn 提交者： Felipe Balbi
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usb: dwc2: Move host-specific core functions into hcd.c 

Move host core initialization and host channel routines into hcd.c. This
allows these functions to only be compiled in host-enabled driver
configurations (DRD or host-only).
Tested-by: NDouglas Anderson <dianders@chromium.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@kernel.org>
上级 58e52ff6
隐藏空白更改
内联 并排
Showing with 1853 addition and 1848 deletion
drivers/usb/dwc2/core.c
浏览文件 @ b02038fa
...@@ -238,62 +238,6 @@ int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg) ...@@ -238,62 +238,6 @@ int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg)
return ret; return ret;
} }
/**
* dwc2_enable_common_interrupts() - Initializes the commmon interrupts,
* used in both device and host modes
*
* @hsotg: Programming view of the DWC_otg controller
*/
static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
{
u32 intmsk;
/* Clear any pending OTG Interrupts */
dwc2_writel(0xffffffff, hsotg->regs + GOTGINT);
/* Clear any pending interrupts */
dwc2_writel(0xffffffff, hsotg->regs + GINTSTS);
/* Enable the interrupts in the GINTMSK */
intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT;
if (hsotg->core_params->dma_enable <= 0)
intmsk |= GINTSTS_RXFLVL;
if (hsotg->core_params->external_id_pin_ctl <= 0)
intmsk |= GINTSTS_CONIDSTSCHNG;
intmsk |= GINTSTS_WKUPINT | GINTSTS_USBSUSP |
GINTSTS_SESSREQINT;
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
}
/*
* Initializes the FSLSPClkSel field of the HCFG register depending on the
* PHY type
*/
static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
{
u32 hcfg, val;
if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
hsotg->core_params->ulpi_fs_ls > 0) ||
hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
/* Full speed PHY */
val = HCFG_FSLSPCLKSEL_48_MHZ;
} else {
/* High speed PHY running at full speed or high speed */
val = HCFG_FSLSPCLKSEL_30_60_MHZ;
}
dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
hcfg = dwc2_readl(hsotg->regs + HCFG);
hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
dwc2_writel(hcfg, hsotg->regs + HCFG);
}
/* /*
* Do core a soft reset of the core. Be careful with this because it * Do core a soft reset of the core. Be careful with this because it
* resets all the internal state machines of the core. * resets all the internal state machines of the core.
...@@ -463,1726 +407,6 @@ int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg) ...@@ -463,1726 +407,6 @@ int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg)
return 0; return 0;
} }
static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
{
u32 usbcfg, i2cctl;
int retval = 0;
/*
* core_init() is now called on every switch so only call the
* following for the first time through
*/
if (select_phy) {
dev_dbg(hsotg->dev, "FS PHY selected\n");
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
if (!(usbcfg & GUSBCFG_PHYSEL)) {
usbcfg |= GUSBCFG_PHYSEL;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/* Reset after a PHY select */
retval = dwc2_core_reset_and_force_dr_mode(hsotg);
if (retval) {
dev_err(hsotg->dev,
"%s: Reset failed, aborting", __func__);
return retval;
}
}
}
/*
* Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
* do this on HNP Dev/Host mode switches (done in dev_init and
* host_init).
*/
if (dwc2_is_host_mode(hsotg))
dwc2_init_fs_ls_pclk_sel(hsotg);
if (hsotg->core_params->i2c_enable > 0) {
dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
/* Program GUSBCFG.OtgUtmiFsSel to I2C */
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/* Program GI2CCTL.I2CEn */
i2cctl = dwc2_readl(hsotg->regs + GI2CCTL);
i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
i2cctl &= ~GI2CCTL_I2CEN;
dwc2_writel(i2cctl, hsotg->regs + GI2CCTL);
i2cctl |= GI2CCTL_I2CEN;
dwc2_writel(i2cctl, hsotg->regs + GI2CCTL);
}
return retval;
}
static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
{
u32 usbcfg, usbcfg_old;
int retval = 0;
if (!select_phy)
return 0;
usbcfg = usbcfg_old = dwc2_readl(hsotg->regs + GUSBCFG);
/*
* HS PHY parameters. These parameters are preserved during soft reset
* so only program the first time. Do a soft reset immediately after
* setting phyif.
*/
switch (hsotg->core_params->phy_type) {
case DWC2_PHY_TYPE_PARAM_ULPI:
/* ULPI interface */
dev_dbg(hsotg->dev, "HS ULPI PHY selected\n");
usbcfg |= GUSBCFG_ULPI_UTMI_SEL;
usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
if (hsotg->core_params->phy_ulpi_ddr > 0)
usbcfg |= GUSBCFG_DDRSEL;
break;
case DWC2_PHY_TYPE_PARAM_UTMI:
/* UTMI+ interface */
dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
if (hsotg->core_params->phy_utmi_width == 16)
usbcfg |= GUSBCFG_PHYIF16;
break;
default:
dev_err(hsotg->dev, "FS PHY selected at HS!\n");
break;
}
if (usbcfg != usbcfg_old) {
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/* Reset after setting the PHY parameters */
retval = dwc2_core_reset_and_force_dr_mode(hsotg);
if (retval) {
dev_err(hsotg->dev,
"%s: Reset failed, aborting", __func__);
return retval;
}
}
return retval;
}
static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
{
u32 usbcfg;
int retval = 0;
if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL &&
hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
/* If FS mode with FS PHY */
retval = dwc2_fs_phy_init(hsotg, select_phy);
if (retval)
return retval;
} else {
/* High speed PHY */
retval = dwc2_hs_phy_init(hsotg, select_phy);
if (retval)
return retval;
}
if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
hsotg->core_params->ulpi_fs_ls > 0) {
dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg |= GUSBCFG_ULPI_FS_LS;
usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
} else {
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg &= ~GUSBCFG_ULPI_FS_LS;
usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
}
return retval;
}
static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg)
{
u32 ahbcfg = dwc2_readl(hsotg->regs + GAHBCFG);
switch (hsotg->hw_params.arch) {
case GHWCFG2_EXT_DMA_ARCH:
dev_err(hsotg->dev, "External DMA Mode not supported\n");
return -EINVAL;
case GHWCFG2_INT_DMA_ARCH:
dev_dbg(hsotg->dev, "Internal DMA Mode\n");
if (hsotg->core_params->ahbcfg != -1) {
ahbcfg &= GAHBCFG_CTRL_MASK;
ahbcfg |= hsotg->core_params->ahbcfg &
~GAHBCFG_CTRL_MASK;
}
break;
case GHWCFG2_SLAVE_ONLY_ARCH:
default:
dev_dbg(hsotg->dev, "Slave Only Mode\n");
break;
}
dev_dbg(hsotg->dev, "dma_enable:%d dma_desc_enable:%d\n",
hsotg->core_params->dma_enable,
hsotg->core_params->dma_desc_enable);
if (hsotg->core_params->dma_enable > 0) {
if (hsotg->core_params->dma_desc_enable > 0)
dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n");
else
dev_dbg(hsotg->dev, "Using Buffer DMA mode\n");
} else {
dev_dbg(hsotg->dev, "Using Slave mode\n");
hsotg->core_params->dma_desc_enable = 0;
}
if (hsotg->core_params->dma_enable > 0)
ahbcfg |= GAHBCFG_DMA_EN;
dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG);
return 0;
}
static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg)
{
u32 usbcfg;
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg &= ~(GUSBCFG_HNPCAP | GUSBCFG_SRPCAP);
switch (hsotg->hw_params.op_mode) {
case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
if (hsotg->core_params->otg_cap ==
DWC2_CAP_PARAM_HNP_SRP_CAPABLE)
usbcfg |= GUSBCFG_HNPCAP;
if (hsotg->core_params->otg_cap !=
DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
usbcfg |= GUSBCFG_SRPCAP;
break;
case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
if (hsotg->core_params->otg_cap !=
DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
usbcfg |= GUSBCFG_SRPCAP;
break;
case GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE:
case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST:
default:
break;
}
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
}
/**
* dwc2_core_init() - Initializes the DWC_otg controller registers and
* prepares the core for device mode or host mode operation
*
* @hsotg: Programming view of the DWC_otg controller
* @initial_setup: If true then this is the first init for this instance.
*/
int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup)
{
u32 usbcfg, otgctl;
int retval;
dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
/* Set ULPI External VBUS bit if needed */
usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV;
if (hsotg->core_params->phy_ulpi_ext_vbus ==
DWC2_PHY_ULPI_EXTERNAL_VBUS)
usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV;
/* Set external TS Dline pulsing bit if needed */
usbcfg &= ~GUSBCFG_TERMSELDLPULSE;
if (hsotg->core_params->ts_dline > 0)
usbcfg |= GUSBCFG_TERMSELDLPULSE;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/*
* Reset the Controller
*
* We only need to reset the controller if this is a re-init.
* For the first init we know for sure that earlier code reset us (it
* needed to in order to properly detect various parameters).
*/
if (!initial_setup) {
retval = dwc2_core_reset_and_force_dr_mode(hsotg);
if (retval) {
dev_err(hsotg->dev, "%s(): Reset failed, aborting\n",
__func__);
return retval;
}
}
/*
* This needs to happen in FS mode before any other programming occurs
*/
retval = dwc2_phy_init(hsotg, initial_setup);
if (retval)
return retval;
/* Program the GAHBCFG Register */
retval = dwc2_gahbcfg_init(hsotg);
if (retval)
return retval;
/* Program the GUSBCFG register */
dwc2_gusbcfg_init(hsotg);
/* Program the GOTGCTL register */
otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
otgctl &= ~GOTGCTL_OTGVER;
if (hsotg->core_params->otg_ver > 0)
otgctl |= GOTGCTL_OTGVER;
dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->core_params->otg_ver);
/* Clear the SRP success bit for FS-I2c */
hsotg->srp_success = 0;
/* Enable common interrupts */
dwc2_enable_common_interrupts(hsotg);
/*
* Do device or host initialization based on mode during PCD and
* HCD initialization
*/
if (dwc2_is_host_mode(hsotg)) {
dev_dbg(hsotg->dev, "Host Mode\n");
hsotg->op_state = OTG_STATE_A_HOST;
} else {
dev_dbg(hsotg->dev, "Device Mode\n");
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
}
return 0;
}
/**
* dwc2_enable_host_interrupts() - Enables the Host mode interrupts
*
* @hsotg: Programming view of DWC_otg controller
*/
void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg)
{
u32 intmsk;
dev_dbg(hsotg->dev, "%s()\n", __func__);
/* Disable all interrupts */
dwc2_writel(0, hsotg->regs + GINTMSK);
dwc2_writel(0, hsotg->regs + HAINTMSK);
/* Enable the common interrupts */
dwc2_enable_common_interrupts(hsotg);
/* Enable host mode interrupts without disturbing common interrupts */
intmsk = dwc2_readl(hsotg->regs + GINTMSK);
intmsk |= GINTSTS_DISCONNINT | GINTSTS_PRTINT | GINTSTS_HCHINT;
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
}
/**
* dwc2_disable_host_interrupts() - Disables the Host Mode interrupts
*
* @hsotg: Programming view of DWC_otg controller
*/
void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg)
{
u32 intmsk = dwc2_readl(hsotg->regs + GINTMSK);
/* Disable host mode interrupts without disturbing common interrupts */
intmsk &= ~(GINTSTS_SOF | GINTSTS_PRTINT | GINTSTS_HCHINT |
GINTSTS_PTXFEMP | GINTSTS_NPTXFEMP | GINTSTS_DISCONNINT);
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
}
/*
* dwc2_calculate_dynamic_fifo() - Calculates the default fifo size
* For system that have a total fifo depth that is smaller than the default
* RX + TX fifo size.
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_calculate_dynamic_fifo(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *params = hsotg->core_params;
struct dwc2_hw_params *hw = &hsotg->hw_params;
u32 rxfsiz, nptxfsiz, ptxfsiz, total_fifo_size;
total_fifo_size = hw->total_fifo_size;
rxfsiz = params->host_rx_fifo_size;
nptxfsiz = params->host_nperio_tx_fifo_size;
ptxfsiz = params->host_perio_tx_fifo_size;
/*
* Will use Method 2 defined in the DWC2 spec: minimum FIFO depth
* allocation with support for high bandwidth endpoints. Synopsys
* defines MPS(Max Packet size) for a periodic EP=1024, and for
* non-periodic as 512.
*/
if (total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz)) {
/*
* For Buffer DMA mode/Scatter Gather DMA mode
* 2 * ((Largest Packet size / 4) + 1 + 1) + n
* with n = number of host channel.
* 2 * ((1024/4) + 2) = 516
*/
rxfsiz = 516 + hw->host_channels;
/*
* min non-periodic tx fifo depth
* 2 * (largest non-periodic USB packet used / 4)
* 2 * (512/4) = 256
*/
nptxfsiz = 256;
/*
* min periodic tx fifo depth
* (largest packet size*MC)/4
* (1024 * 3)/4 = 768
*/
ptxfsiz = 768;
params->host_rx_fifo_size = rxfsiz;
params->host_nperio_tx_fifo_size = nptxfsiz;
params->host_perio_tx_fifo_size = ptxfsiz;
}
/*
* If the summation of RX, NPTX and PTX fifo sizes is still
* bigger than the total_fifo_size, then we have a problem.
*
* We won't be able to allocate as many endpoints. Right now,
* we're just printing an error message, but ideally this FIFO
* allocation algorithm would be improved in the future.
*
* FIXME improve this FIFO allocation algorithm.
*/
if (unlikely(total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz)))
dev_err(hsotg->dev, "invalid fifo sizes\n");
}
static void dwc2_config_fifos(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *params = hsotg->core_params;
u32 nptxfsiz, hptxfsiz, dfifocfg, grxfsiz;
if (!params->enable_dynamic_fifo)
return;
dwc2_calculate_dynamic_fifo(hsotg);
/* Rx FIFO */
grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
dev_dbg(hsotg->dev, "initial grxfsiz=%08x\n", grxfsiz);
grxfsiz &= ~GRXFSIZ_DEPTH_MASK;
grxfsiz |= params->host_rx_fifo_size <<
GRXFSIZ_DEPTH_SHIFT & GRXFSIZ_DEPTH_MASK;
dwc2_writel(grxfsiz, hsotg->regs + GRXFSIZ);
dev_dbg(hsotg->dev, "new grxfsiz=%08x\n",
dwc2_readl(hsotg->regs + GRXFSIZ));
/* Non-periodic Tx FIFO */
dev_dbg(hsotg->dev, "initial gnptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + GNPTXFSIZ));
nptxfsiz = params->host_nperio_tx_fifo_size <<
FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
nptxfsiz |= params->host_rx_fifo_size <<
FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
dwc2_writel(nptxfsiz, hsotg->regs + GNPTXFSIZ);
dev_dbg(hsotg->dev, "new gnptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + GNPTXFSIZ));
/* Periodic Tx FIFO */
dev_dbg(hsotg->dev, "initial hptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + HPTXFSIZ));
hptxfsiz = params->host_perio_tx_fifo_size <<
FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
hptxfsiz |= (params->host_rx_fifo_size +
params->host_nperio_tx_fifo_size) <<
FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
dwc2_writel(hptxfsiz, hsotg->regs + HPTXFSIZ);
dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + HPTXFSIZ));
if (hsotg->core_params->en_multiple_tx_fifo > 0 &&
hsotg->hw_params.snpsid <= DWC2_CORE_REV_2_94a) {
/*
* Global DFIFOCFG calculation for Host mode -
* include RxFIFO, NPTXFIFO and HPTXFIFO
*/
dfifocfg = dwc2_readl(hsotg->regs + GDFIFOCFG);
dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK;
dfifocfg |= (params->host_rx_fifo_size +
params->host_nperio_tx_fifo_size +
params->host_perio_tx_fifo_size) <<
GDFIFOCFG_EPINFOBASE_SHIFT &
GDFIFOCFG_EPINFOBASE_MASK;
dwc2_writel(dfifocfg, hsotg->regs + GDFIFOCFG);
}
}
/**
* dwc2_core_host_init() - Initializes the DWC_otg controller registers for
* Host mode
*
* @hsotg: Programming view of DWC_otg controller
*
* This function flushes the Tx and Rx FIFOs and flushes any entries in the
* request queues. Host channels are reset to ensure that they are ready for
* performing transfers.
*/
void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
{
u32 hcfg, hfir, otgctl;
dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
/* Restart the Phy Clock */
dwc2_writel(0, hsotg->regs + PCGCTL);
/* Initialize Host Configuration Register */
dwc2_init_fs_ls_pclk_sel(hsotg);
if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL) {
hcfg = dwc2_readl(hsotg->regs + HCFG);
hcfg |= HCFG_FSLSSUPP;
dwc2_writel(hcfg, hsotg->regs + HCFG);
}
/*
* This bit allows dynamic reloading of the HFIR register during
* runtime. This bit needs to be programmed during initial configuration
* and its value must not be changed during runtime.
*/
if (hsotg->core_params->reload_ctl > 0) {
hfir = dwc2_readl(hsotg->regs + HFIR);
hfir |= HFIR_RLDCTRL;
dwc2_writel(hfir, hsotg->regs + HFIR);
}
if (hsotg->core_params->dma_desc_enable > 0) {
u32 op_mode = hsotg->hw_params.op_mode;
if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a ||
!hsotg->hw_params.dma_desc_enable ||
op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE ||
op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE ||
op_mode == GHWCFG2_OP_MODE_UNDEFINED) {
dev_err(hsotg->dev,
"Hardware does not support descriptor DMA mode -\n");
dev_err(hsotg->dev,
"falling back to buffer DMA mode.\n");
hsotg->core_params->dma_desc_enable = 0;
} else {
hcfg = dwc2_readl(hsotg->regs + HCFG);
hcfg |= HCFG_DESCDMA;
dwc2_writel(hcfg, hsotg->regs + HCFG);
}
}
/* Configure data FIFO sizes */
dwc2_config_fifos(hsotg);
/* TODO - check this */
/* Clear Host Set HNP Enable in the OTG Control Register */
otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
otgctl &= ~GOTGCTL_HSTSETHNPEN;
dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
/* Make sure the FIFOs are flushed */
dwc2_flush_tx_fifo(hsotg, 0x10 /* all TX FIFOs */);
dwc2_flush_rx_fifo(hsotg);
/* Clear Host Set HNP Enable in the OTG Control Register */
otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
otgctl &= ~GOTGCTL_HSTSETHNPEN;
dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
if (hsotg->core_params->dma_desc_enable <= 0) {
int num_channels, i;
u32 hcchar;
/* Flush out any leftover queued requests */
num_channels = hsotg->core_params->host_channels;
for (i = 0; i < num_channels; i++) {
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
hcchar &= ~HCCHAR_CHENA;
hcchar |= HCCHAR_CHDIS;
hcchar &= ~HCCHAR_EPDIR;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(i));
}
/* Halt all channels to put them into a known state */
for (i = 0; i < num_channels; i++) {
int count = 0;
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
hcchar &= ~HCCHAR_EPDIR;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(i));
dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
__func__, i);
do {
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
if (++count > 1000) {
dev_err(hsotg->dev,
"Unable to clear enable on channel %d\n",
i);
break;
}
udelay(1);
} while (hcchar & HCCHAR_CHENA);
}
}
/* Turn on the vbus power */
dev_dbg(hsotg->dev, "Init: Port Power? op_state=%d\n", hsotg->op_state);
if (hsotg->op_state == OTG_STATE_A_HOST) {
u32 hprt0 = dwc2_read_hprt0(hsotg);
dev_dbg(hsotg->dev, "Init: Power Port (%d)\n",
!!(hprt0 & HPRT0_PWR));
if (!(hprt0 & HPRT0_PWR)) {
hprt0 |= HPRT0_PWR;
dwc2_writel(hprt0, hsotg->regs + HPRT0);
}
}
dwc2_enable_host_interrupts(hsotg);
}
static void dwc2_hc_enable_slave_ints(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcintmsk = HCINTMSK_CHHLTD;
switch (chan->ep_type) {
case USB_ENDPOINT_XFER_CONTROL:
case USB_ENDPOINT_XFER_BULK:
dev_vdbg(hsotg->dev, "control/bulk\n");
hcintmsk |= HCINTMSK_XFERCOMPL;
hcintmsk |= HCINTMSK_STALL;
hcintmsk |= HCINTMSK_XACTERR;
hcintmsk |= HCINTMSK_DATATGLERR;
if (chan->ep_is_in) {
hcintmsk |= HCINTMSK_BBLERR;
} else {
hcintmsk |= HCINTMSK_NAK;
hcintmsk |= HCINTMSK_NYET;
if (chan->do_ping)
hcintmsk |= HCINTMSK_ACK;
}
if (chan->do_split) {
hcintmsk |= HCINTMSK_NAK;
if (chan->complete_split)
hcintmsk |= HCINTMSK_NYET;
else
hcintmsk |= HCINTMSK_ACK;
}
if (chan->error_state)
hcintmsk |= HCINTMSK_ACK;
break;
case USB_ENDPOINT_XFER_INT:
if (dbg_perio())
dev_vdbg(hsotg->dev, "intr\n");
hcintmsk |= HCINTMSK_XFERCOMPL;
hcintmsk |= HCINTMSK_NAK;
hcintmsk |= HCINTMSK_STALL;
hcintmsk |= HCINTMSK_XACTERR;
hcintmsk |= HCINTMSK_DATATGLERR;
hcintmsk |= HCINTMSK_FRMOVRUN;
if (chan->ep_is_in)
hcintmsk |= HCINTMSK_BBLERR;
if (chan->error_state)
hcintmsk |= HCINTMSK_ACK;
if (chan->do_split) {
if (chan->complete_split)
hcintmsk |= HCINTMSK_NYET;
else
hcintmsk |= HCINTMSK_ACK;
}
break;
case USB_ENDPOINT_XFER_ISOC:
if (dbg_perio())
dev_vdbg(hsotg->dev, "isoc\n");
hcintmsk |= HCINTMSK_XFERCOMPL;
hcintmsk |= HCINTMSK_FRMOVRUN;
hcintmsk |= HCINTMSK_ACK;
if (chan->ep_is_in) {
hcintmsk |= HCINTMSK_XACTERR;
hcintmsk |= HCINTMSK_BBLERR;
}
break;
default:
dev_err(hsotg->dev, "## Unknown EP type ##\n");
break;
}
dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
}
static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcintmsk = HCINTMSK_CHHLTD;
/*
* For Descriptor DMA mode core halts the channel on AHB error.
* Interrupt is not required.
*/
if (hsotg->core_params->dma_desc_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "desc DMA disabled\n");
hcintmsk |= HCINTMSK_AHBERR;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "desc DMA enabled\n");
if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
hcintmsk |= HCINTMSK_XFERCOMPL;
}
if (chan->error_state && !chan->do_split &&
chan->ep_type != USB_ENDPOINT_XFER_ISOC) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "setting ACK\n");
hcintmsk |= HCINTMSK_ACK;
if (chan->ep_is_in) {
hcintmsk |= HCINTMSK_DATATGLERR;
if (chan->ep_type != USB_ENDPOINT_XFER_INT)
hcintmsk |= HCINTMSK_NAK;
}
}
dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
}
static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 intmsk;
if (hsotg->core_params->dma_enable > 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA enabled\n");
dwc2_hc_enable_dma_ints(hsotg, chan);
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA disabled\n");
dwc2_hc_enable_slave_ints(hsotg, chan);
}
/* Enable the top level host channel interrupt */
intmsk = dwc2_readl(hsotg->regs + HAINTMSK);
intmsk |= 1 << chan->hc_num;
dwc2_writel(intmsk, hsotg->regs + HAINTMSK);
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set HAINTMSK to %08x\n", intmsk);
/* Make sure host channel interrupts are enabled */
intmsk = dwc2_readl(hsotg->regs + GINTMSK);
intmsk |= GINTSTS_HCHINT;
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set GINTMSK to %08x\n", intmsk);
}
/**
* dwc2_hc_init() - Prepares a host channel for transferring packets to/from
* a specific endpoint
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* The HCCHARn register is set up with the characteristics specified in chan.
* Host channel interrupts that may need to be serviced while this transfer is
* in progress are enabled.
*/
void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
{
u8 hc_num = chan->hc_num;
u32 hcintmsk;
u32 hcchar;
u32 hcsplt = 0;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
/* Clear old interrupt conditions for this host channel */
hcintmsk = 0xffffffff;
hcintmsk &= ~HCINTMSK_RESERVED14_31;
dwc2_writel(hcintmsk, hsotg->regs + HCINT(hc_num));
/* Enable channel interrupts required for this transfer */
dwc2_hc_enable_ints(hsotg, chan);
/*
* Program the HCCHARn register with the endpoint characteristics for
* the current transfer
*/
hcchar = chan->dev_addr << HCCHAR_DEVADDR_SHIFT & HCCHAR_DEVADDR_MASK;
hcchar |= chan->ep_num << HCCHAR_EPNUM_SHIFT & HCCHAR_EPNUM_MASK;
if (chan->ep_is_in)
hcchar |= HCCHAR_EPDIR;
if (chan->speed == USB_SPEED_LOW)
hcchar |= HCCHAR_LSPDDEV;
hcchar |= chan->ep_type << HCCHAR_EPTYPE_SHIFT & HCCHAR_EPTYPE_MASK;
hcchar |= chan->max_packet << HCCHAR_MPS_SHIFT & HCCHAR_MPS_MASK;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(hc_num));
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "set HCCHAR(%d) to %08x\n",
hc_num, hcchar);
dev_vdbg(hsotg->dev, "%s: Channel %d\n",
__func__, hc_num);
dev_vdbg(hsotg->dev, " Dev Addr: %d\n",
chan->dev_addr);
dev_vdbg(hsotg->dev, " Ep Num: %d\n",
chan->ep_num);
dev_vdbg(hsotg->dev, " Is In: %d\n",
chan->ep_is_in);
dev_vdbg(hsotg->dev, " Is Low Speed: %d\n",
chan->speed == USB_SPEED_LOW);
dev_vdbg(hsotg->dev, " Ep Type: %d\n",
chan->ep_type);
dev_vdbg(hsotg->dev, " Max Pkt: %d\n",
chan->max_packet);
}
/* Program the HCSPLT register for SPLITs */
if (chan->do_split) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev,
"Programming HC %d with split --> %s\n",
hc_num,
chan->complete_split ? "CSPLIT" : "SSPLIT");
if (chan->complete_split)
hcsplt |= HCSPLT_COMPSPLT;
hcsplt |= chan->xact_pos << HCSPLT_XACTPOS_SHIFT &
HCSPLT_XACTPOS_MASK;
hcsplt |= chan->hub_addr << HCSPLT_HUBADDR_SHIFT &
HCSPLT_HUBADDR_MASK;
hcsplt |= chan->hub_port << HCSPLT_PRTADDR_SHIFT &
HCSPLT_PRTADDR_MASK;
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, " comp split %d\n",
chan->complete_split);
dev_vdbg(hsotg->dev, " xact pos %d\n",
chan->xact_pos);
dev_vdbg(hsotg->dev, " hub addr %d\n",
chan->hub_addr);
dev_vdbg(hsotg->dev, " hub port %d\n",
chan->hub_port);
dev_vdbg(hsotg->dev, " is_in %d\n",
chan->ep_is_in);
dev_vdbg(hsotg->dev, " Max Pkt %d\n",
chan->max_packet);
dev_vdbg(hsotg->dev, " xferlen %d\n",
chan->xfer_len);
}
}
dwc2_writel(hcsplt, hsotg->regs + HCSPLT(hc_num));
}
/**
* dwc2_hc_halt() - Attempts to halt a host channel
*
* @hsotg: Controller register interface
* @chan: Host channel to halt
* @halt_status: Reason for halting the channel
*
* This function should only be called in Slave mode or to abort a transfer in
* either Slave mode or DMA mode. Under normal circumstances in DMA mode, the
* controller halts the channel when the transfer is complete or a condition
* occurs that requires application intervention.
*
* In slave mode, checks for a free request queue entry, then sets the Channel
* Enable and Channel Disable bits of the Host Channel Characteristics
* register of the specified channel to intiate the halt. If there is no free
* request queue entry, sets only the Channel Disable bit of the HCCHARn
* register to flush requests for this channel. In the latter case, sets a
* flag to indicate that the host channel needs to be halted when a request
* queue slot is open.
*
* In DMA mode, always sets the Channel Enable and Channel Disable bits of the
* HCCHARn register. The controller ensures there is space in the request
* queue before submitting the halt request.
*
* Some time may elapse before the core flushes any posted requests for this
* host channel and halts. The Channel Halted interrupt handler completes the
* deactivation of the host channel.
*/
void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
enum dwc2_halt_status halt_status)
{
u32 nptxsts, hptxsts, hcchar;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS)
dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status);
if (halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
halt_status == DWC2_HC_XFER_AHB_ERR) {
/*
* Disable all channel interrupts except Ch Halted. The QTD
* and QH state associated with this transfer has been cleared
* (in the case of URB_DEQUEUE), so the channel needs to be
* shut down carefully to prevent crashes.
*/
u32 hcintmsk = HCINTMSK_CHHLTD;
dev_vdbg(hsotg->dev, "dequeue/error\n");
dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
/*
* Make sure no other interrupts besides halt are currently
* pending. Handling another interrupt could cause a crash due
* to the QTD and QH state.
*/
dwc2_writel(~hcintmsk, hsotg->regs + HCINT(chan->hc_num));
/*
* Make sure the halt status is set to URB_DEQUEUE or AHB_ERR
* even if the channel was already halted for some other
* reason
*/
chan->halt_status = halt_status;
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
if (!(hcchar & HCCHAR_CHENA)) {
/*
* The channel is either already halted or it hasn't
* started yet. In DMA mode, the transfer may halt if
* it finishes normally or a condition occurs that
* requires driver intervention. Don't want to halt
* the channel again. In either Slave or DMA mode,
* it's possible that the transfer has been assigned
* to a channel, but not started yet when an URB is
* dequeued. Don't want to halt a channel that hasn't
* started yet.
*/
return;
}
}
if (chan->halt_pending) {
/*
* A halt has already been issued for this channel. This might
* happen when a transfer is aborted by a higher level in
* the stack.
*/
dev_vdbg(hsotg->dev,
"*** %s: Channel %d, chan->halt_pending already set ***\n",
__func__, chan->hc_num);
return;
}
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
/* No need to set the bit in DDMA for disabling the channel */
/* TODO check it everywhere channel is disabled */
if (hsotg->core_params->dma_desc_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "desc DMA disabled\n");
hcchar |= HCCHAR_CHENA;
} else {
if (dbg_hc(chan))
dev_dbg(hsotg->dev, "desc DMA enabled\n");
}
hcchar |= HCCHAR_CHDIS;
if (hsotg->core_params->dma_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA not enabled\n");
hcchar |= HCCHAR_CHENA;
/* Check for space in the request queue to issue the halt */
if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
chan->ep_type == USB_ENDPOINT_XFER_BULK) {
dev_vdbg(hsotg->dev, "control/bulk\n");
nptxsts = dwc2_readl(hsotg->regs + GNPTXSTS);
if ((nptxsts & TXSTS_QSPCAVAIL_MASK) == 0) {
dev_vdbg(hsotg->dev, "Disabling channel\n");
hcchar &= ~HCCHAR_CHENA;
}
} else {
if (dbg_perio())
dev_vdbg(hsotg->dev, "isoc/intr\n");
hptxsts = dwc2_readl(hsotg->regs + HPTXSTS);
if ((hptxsts & TXSTS_QSPCAVAIL_MASK) == 0 ||
hsotg->queuing_high_bandwidth) {
if (dbg_perio())
dev_vdbg(hsotg->dev, "Disabling channel\n");
hcchar &= ~HCCHAR_CHENA;
}
}
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA enabled\n");
}
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
chan->halt_status = halt_status;
if (hcchar & HCCHAR_CHENA) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Channel enabled\n");
chan->halt_pending = 1;
chan->halt_on_queue = 0;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Channel disabled\n");
chan->halt_on_queue = 1;
}
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
dev_vdbg(hsotg->dev, " hcchar: 0x%08x\n",
hcchar);
dev_vdbg(hsotg->dev, " halt_pending: %d\n",
chan->halt_pending);
dev_vdbg(hsotg->dev, " halt_on_queue: %d\n",
chan->halt_on_queue);
dev_vdbg(hsotg->dev, " halt_status: %d\n",
chan->halt_status);
}
}
/**
* dwc2_hc_cleanup() - Clears the transfer state for a host channel
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Identifies the host channel to clean up
*
* This function is normally called after a transfer is done and the host
* channel is being released
*/
void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
{
u32 hcintmsk;
chan->xfer_started = 0;
list_del_init(&chan->split_order_list_entry);
/*
* Clear channel interrupt enables and any unhandled channel interrupt
* conditions
*/
dwc2_writel(0, hsotg->regs + HCINTMSK(chan->hc_num));
hcintmsk = 0xffffffff;
hcintmsk &= ~HCINTMSK_RESERVED14_31;
dwc2_writel(hcintmsk, hsotg->regs + HCINT(chan->hc_num));
}
/**
* dwc2_hc_set_even_odd_frame() - Sets the channel property that indicates in
* which frame a periodic transfer should occur
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Identifies the host channel to set up and its properties
* @hcchar: Current value of the HCCHAR register for the specified host channel
*
* This function has no effect on non-periodic transfers
*/
static void dwc2_hc_set_even_odd_frame(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan, u32 *hcchar)
{
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
int host_speed;
int xfer_ns;
int xfer_us;
int bytes_in_fifo;
u16 fifo_space;
u16 frame_number;
u16 wire_frame;
/*
* Try to figure out if we're an even or odd frame. If we set
* even and the current frame number is even the the transfer
* will happen immediately. Similar if both are odd. If one is
* even and the other is odd then the transfer will happen when
* the frame number ticks.
*
* There's a bit of a balancing act to get this right.
* Sometimes we may want to send data in the current frame (AK
* right away). We might want to do this if the frame number
* _just_ ticked, but we might also want to do this in order
* to continue a split transaction that happened late in a
* microframe (so we didn't know to queue the next transfer
* until the frame number had ticked). The problem is that we
* need a lot of knowledge to know if there's actually still
* time to send things or if it would be better to wait until
* the next frame.
*
* We can look at how much time is left in the current frame
* and make a guess about whether we'll have time to transfer.
* We'll do that.
*/
/* Get speed host is running at */
host_speed = (chan->speed != USB_SPEED_HIGH &&
!chan->do_split) ? chan->speed : USB_SPEED_HIGH;
/* See how many bytes are in the periodic FIFO right now */
fifo_space = (dwc2_readl(hsotg->regs + HPTXSTS) &
TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT;
bytes_in_fifo = sizeof(u32) *
(hsotg->core_params->host_perio_tx_fifo_size -
fifo_space);
/*
* Roughly estimate bus time for everything in the periodic
* queue + our new transfer. This is "rough" because we're
* using a function that makes takes into account IN/OUT
* and INT/ISO and we're just slamming in one value for all
* transfers. This should be an over-estimate and that should
* be OK, but we can probably tighten it.
*/
xfer_ns = usb_calc_bus_time(host_speed, false, false,
chan->xfer_len + bytes_in_fifo);
xfer_us = NS_TO_US(xfer_ns);
/* See what frame number we'll be at by the time we finish */
frame_number = dwc2_hcd_get_future_frame_number(hsotg, xfer_us);
/* This is when we were scheduled to be on the wire */
wire_frame = dwc2_frame_num_inc(chan->qh->next_active_frame, 1);
/*
* If we'd finish _after_ the frame we're scheduled in then
* it's hopeless. Just schedule right away and hope for the
* best. Note that it _might_ be wise to call back into the
* scheduler to pick a better frame, but this is better than
* nothing.
*/
if (dwc2_frame_num_gt(frame_number, wire_frame)) {
dwc2_sch_vdbg(hsotg,
"QH=%p EO MISS fr=%04x=>%04x (%+d)\n",
chan->qh, wire_frame, frame_number,
dwc2_frame_num_dec(frame_number,
wire_frame));
wire_frame = frame_number;
/*
* We picked a different frame number; communicate this
* back to the scheduler so it doesn't try to schedule
* another in the same frame.
*
* Remember that next_active_frame is 1 before the wire
* frame.
*/
chan->qh->next_active_frame =
dwc2_frame_num_dec(frame_number, 1);
}
if (wire_frame & 1)
*hcchar |= HCCHAR_ODDFRM;
else
*hcchar &= ~HCCHAR_ODDFRM;
}
}
static void dwc2_set_pid_isoc(struct dwc2_host_chan *chan)
{
/* Set up the initial PID for the transfer */
if (chan->speed == USB_SPEED_HIGH) {
if (chan->ep_is_in) {
if (chan->multi_count == 1)
chan->data_pid_start = DWC2_HC_PID_DATA0;
else if (chan->multi_count == 2)
chan->data_pid_start = DWC2_HC_PID_DATA1;
else
chan->data_pid_start = DWC2_HC_PID_DATA2;
} else {
if (chan->multi_count == 1)
chan->data_pid_start = DWC2_HC_PID_DATA0;
else
chan->data_pid_start = DWC2_HC_PID_MDATA;
}
} else {
chan->data_pid_start = DWC2_HC_PID_DATA0;
}
}
/**
* dwc2_hc_write_packet() - Writes a packet into the Tx FIFO associated with
* the Host Channel
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* This function should only be called in Slave mode. For a channel associated
* with a non-periodic EP, the non-periodic Tx FIFO is written. For a channel
* associated with a periodic EP, the periodic Tx FIFO is written.
*
* Upon return the xfer_buf and xfer_count fields in chan are incremented by
* the number of bytes written to the Tx FIFO.
*/
static void dwc2_hc_write_packet(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 i;
u32 remaining_count;
u32 byte_count;
u32 dword_count;
u32 __iomem *data_fifo;
u32 *data_buf = (u32 *)chan->xfer_buf;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
data_fifo = (u32 __iomem *)(hsotg->regs + HCFIFO(chan->hc_num));
remaining_count = chan->xfer_len - chan->xfer_count;
if (remaining_count > chan->max_packet)
byte_count = chan->max_packet;
else
byte_count = remaining_count;
dword_count = (byte_count + 3) / 4;
if (((unsigned long)data_buf & 0x3) == 0) {
/* xfer_buf is DWORD aligned */
for (i = 0; i < dword_count; i++, data_buf++)
dwc2_writel(*data_buf, data_fifo);
} else {
/* xfer_buf is not DWORD aligned */
for (i = 0; i < dword_count; i++, data_buf++) {
u32 data = data_buf[0] | data_buf[1] << 8 |
data_buf[2] << 16 | data_buf[3] << 24;
dwc2_writel(data, data_fifo);
}
}
chan->xfer_count += byte_count;
chan->xfer_buf += byte_count;
}
/**
* dwc2_hc_start_transfer() - Does the setup for a data transfer for a host
* channel and starts the transfer
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel. The xfer_len value
* may be reduced to accommodate the max widths of the XferSize and
* PktCnt fields in the HCTSIZn register. The multi_count value may be
* changed to reflect the final xfer_len value.
*
* This function may be called in either Slave mode or DMA mode. In Slave mode,
* the caller must ensure that there is sufficient space in the request queue
* and Tx Data FIFO.
*
* For an OUT transfer in Slave mode, it loads a data packet into the
* appropriate FIFO. If necessary, additional data packets are loaded in the
* Host ISR.
*
* For an IN transfer in Slave mode, a data packet is requested. The data
* packets are unloaded from the Rx FIFO in the Host ISR. If necessary,
* additional data packets are requested in the Host ISR.
*
* For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ
* register along with a packet count of 1 and the channel is enabled. This
* causes a single PING transaction to occur. Other fields in HCTSIZ are
* simply set to 0 since no data transfer occurs in this case.
*
* For a PING transfer in DMA mode, the HCTSIZ register is initialized with
* all the information required to perform the subsequent data transfer. In
* addition, the Do Ping bit is set in the HCTSIZ register. In this case, the
* controller performs the entire PING protocol, then starts the data
* transfer.
*/
void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 max_hc_xfer_size = hsotg->core_params->max_transfer_size;
u16 max_hc_pkt_count = hsotg->core_params->max_packet_count;
u32 hcchar;
u32 hctsiz = 0;
u16 num_packets;
u32 ec_mc;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
if (chan->do_ping) {
if (hsotg->core_params->dma_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "ping, no DMA\n");
dwc2_hc_do_ping(hsotg, chan);
chan->xfer_started = 1;
return;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "ping, DMA\n");
hctsiz |= TSIZ_DOPNG;
}
}
if (chan->do_split) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "split\n");
num_packets = 1;
if (chan->complete_split && !chan->ep_is_in)
/*
* For CSPLIT OUT Transfer, set the size to 0 so the
* core doesn't expect any data written to the FIFO
*/
chan->xfer_len = 0;
else if (chan->ep_is_in || chan->xfer_len > chan->max_packet)
chan->xfer_len = chan->max_packet;
else if (!chan->ep_is_in && chan->xfer_len > 188)
chan->xfer_len = 188;
hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
TSIZ_XFERSIZE_MASK;
/* For split set ec_mc for immediate retries */
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC)
ec_mc = 3;
else
ec_mc = 1;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "no split\n");
/*
* Ensure that the transfer length and packet count will fit
* in the widths allocated for them in the HCTSIZn register
*/
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
/*
* Make sure the transfer size is no larger than one
* (micro)frame's worth of data. (A check was done
* when the periodic transfer was accepted to ensure
* that a (micro)frame's worth of data can be
* programmed into a channel.)
*/
u32 max_periodic_len =
chan->multi_count * chan->max_packet;
if (chan->xfer_len > max_periodic_len)
chan->xfer_len = max_periodic_len;
} else if (chan->xfer_len > max_hc_xfer_size) {
/*
* Make sure that xfer_len is a multiple of max packet
* size
*/
chan->xfer_len =
max_hc_xfer_size - chan->max_packet + 1;
}
if (chan->xfer_len > 0) {
num_packets = (chan->xfer_len + chan->max_packet - 1) /
chan->max_packet;
if (num_packets > max_hc_pkt_count) {
num_packets = max_hc_pkt_count;
chan->xfer_len = num_packets * chan->max_packet;
}
} else {
/* Need 1 packet for transfer length of 0 */
num_packets = 1;
}
if (chan->ep_is_in)
/*
* Always program an integral # of max packets for IN
* transfers
*/
chan->xfer_len = num_packets * chan->max_packet;
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC)
/*
* Make sure that the multi_count field matches the
* actual transfer length
*/
chan->multi_count = num_packets;
if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
dwc2_set_pid_isoc(chan);
hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
TSIZ_XFERSIZE_MASK;
/* The ec_mc gets the multi_count for non-split */
ec_mc = chan->multi_count;
}
chan->start_pkt_count = num_packets;
hctsiz |= num_packets << TSIZ_PKTCNT_SHIFT & TSIZ_PKTCNT_MASK;
hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
TSIZ_SC_MC_PID_MASK;
dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "Wrote %08x to HCTSIZ(%d)\n",
hctsiz, chan->hc_num);
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
dev_vdbg(hsotg->dev, " Xfer Size: %d\n",
(hctsiz & TSIZ_XFERSIZE_MASK) >>
TSIZ_XFERSIZE_SHIFT);
dev_vdbg(hsotg->dev, " Num Pkts: %d\n",
(hctsiz & TSIZ_PKTCNT_MASK) >>
TSIZ_PKTCNT_SHIFT);
dev_vdbg(hsotg->dev, " Start PID: %d\n",
(hctsiz & TSIZ_SC_MC_PID_MASK) >>
TSIZ_SC_MC_PID_SHIFT);
}
if (hsotg->core_params->dma_enable > 0) {
dwc2_writel((u32)chan->xfer_dma,
hsotg->regs + HCDMA(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %08lx to HCDMA(%d)\n",
(unsigned long)chan->xfer_dma, chan->hc_num);
}
/* Start the split */
if (chan->do_split) {
u32 hcsplt = dwc2_readl(hsotg->regs + HCSPLT(chan->hc_num));
hcsplt |= HCSPLT_SPLTENA;
dwc2_writel(hcsplt, hsotg->regs + HCSPLT(chan->hc_num));
}
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcchar &= ~HCCHAR_MULTICNT_MASK;
hcchar |= (ec_mc << HCCHAR_MULTICNT_SHIFT) & HCCHAR_MULTICNT_MASK;
dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
if (hcchar & HCCHAR_CHDIS)
dev_warn(hsotg->dev,
"%s: chdis set, channel %d, hcchar 0x%08x\n",
__func__, chan->hc_num, hcchar);
/* Set host channel enable after all other setup is complete */
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
(hcchar & HCCHAR_MULTICNT_MASK) >>
HCCHAR_MULTICNT_SHIFT);
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
chan->hc_num);
chan->xfer_started = 1;
chan->requests++;
if (hsotg->core_params->dma_enable <= 0 &&
!chan->ep_is_in && chan->xfer_len > 0)
/* Load OUT packet into the appropriate Tx FIFO */
dwc2_hc_write_packet(hsotg, chan);
}
/**
* dwc2_hc_start_transfer_ddma() - Does the setup for a data transfer for a
* host channel and starts the transfer in Descriptor DMA mode
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set.
* Sets PID and NTD values. For periodic transfers initializes SCHED_INFO field
* with micro-frame bitmap.
*
* Initializes HCDMA register with descriptor list address and CTD value then
* starts the transfer via enabling the channel.
*/
void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcchar;
u32 hctsiz = 0;
if (chan->do_ping)
hctsiz |= TSIZ_DOPNG;
if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
dwc2_set_pid_isoc(chan);
/* Packet Count and Xfer Size are not used in Descriptor DMA mode */
hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
TSIZ_SC_MC_PID_MASK;
/* 0 - 1 descriptor, 1 - 2 descriptors, etc */
hctsiz |= (chan->ntd - 1) << TSIZ_NTD_SHIFT & TSIZ_NTD_MASK;
/* Non-zero only for high-speed interrupt endpoints */
hctsiz |= chan->schinfo << TSIZ_SCHINFO_SHIFT & TSIZ_SCHINFO_MASK;
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
dev_vdbg(hsotg->dev, " Start PID: %d\n",
chan->data_pid_start);
dev_vdbg(hsotg->dev, " NTD: %d\n", chan->ntd - 1);
}
dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
dma_sync_single_for_device(hsotg->dev, chan->desc_list_addr,
chan->desc_list_sz, DMA_TO_DEVICE);
dwc2_writel(chan->desc_list_addr, hsotg->regs + HCDMA(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %pad to HCDMA(%d)\n",
&chan->desc_list_addr, chan->hc_num);
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcchar &= ~HCCHAR_MULTICNT_MASK;
hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT &
HCCHAR_MULTICNT_MASK;
if (hcchar & HCCHAR_CHDIS)
dev_warn(hsotg->dev,
"%s: chdis set, channel %d, hcchar 0x%08x\n",
__func__, chan->hc_num, hcchar);
/* Set host channel enable after all other setup is complete */
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
(hcchar & HCCHAR_MULTICNT_MASK) >>
HCCHAR_MULTICNT_SHIFT);
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
chan->hc_num);
chan->xfer_started = 1;
chan->requests++;
}
/**
* dwc2_hc_continue_transfer() - Continues a data transfer that was started by
* a previous call to dwc2_hc_start_transfer()
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* The caller must ensure there is sufficient space in the request queue and Tx
* Data FIFO. This function should only be called in Slave mode. In DMA mode,
* the controller acts autonomously to complete transfers programmed to a host
* channel.
*
* For an OUT transfer, a new data packet is loaded into the appropriate FIFO
* if there is any data remaining to be queued. For an IN transfer, another
* data packet is always requested. For the SETUP phase of a control transfer,
* this function does nothing.
*
* Return: 1 if a new request is queued, 0 if no more requests are required
* for this transfer
*/
int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
if (chan->do_split)
/* SPLITs always queue just once per channel */
return 0;
if (chan->data_pid_start == DWC2_HC_PID_SETUP)
/* SETUPs are queued only once since they can't be NAK'd */
return 0;
if (chan->ep_is_in) {
/*
* Always queue another request for other IN transfers. If
* back-to-back INs are issued and NAKs are received for both,
* the driver may still be processing the first NAK when the
* second NAK is received. When the interrupt handler clears
* the NAK interrupt for the first NAK, the second NAK will
* not be seen. So we can't depend on the NAK interrupt
* handler to requeue a NAK'd request. Instead, IN requests
* are issued each time this function is called. When the
* transfer completes, the extra requests for the channel will
* be flushed.
*/
u32 hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, " IN xfer: hcchar = 0x%08x\n",
hcchar);
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
chan->requests++;
return 1;
}
/* OUT transfers */
if (chan->xfer_count < chan->xfer_len) {
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
u32 hcchar = dwc2_readl(hsotg->regs +
HCCHAR(chan->hc_num));
dwc2_hc_set_even_odd_frame(hsotg, chan,
&hcchar);
}
/* Load OUT packet into the appropriate Tx FIFO */
dwc2_hc_write_packet(hsotg, chan);
chan->requests++;
return 1;
}
return 0;
}
/**
* dwc2_hc_do_ping() - Starts a PING transfer
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* This function should only be called in Slave mode. The Do Ping bit is set in
* the HCTSIZ register, then the channel is enabled.
*/
void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
{
u32 hcchar;
u32 hctsiz;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
hctsiz = TSIZ_DOPNG;
hctsiz |= 1 << TSIZ_PKTCNT_SHIFT;
dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
}
/**
* dwc2_calc_frame_interval() - Calculates the correct frame Interval value for
* the HFIR register according to PHY type and speed
*
* @hsotg: Programming view of DWC_otg controller
*
* NOTE: The caller can modify the value of the HFIR register only after the
* Port Enable bit of the Host Port Control and Status register (HPRT.EnaPort)
* has been set
*/
u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg)
{
u32 usbcfg;
u32 hprt0;
int clock = 60; /* default value */
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
hprt0 = dwc2_readl(hsotg->regs + HPRT0);
if (!(usbcfg & GUSBCFG_PHYSEL) && (usbcfg & GUSBCFG_ULPI_UTMI_SEL) &&
!(usbcfg & GUSBCFG_PHYIF16))
clock = 60;
if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type ==
GHWCFG2_FS_PHY_TYPE_SHARED_ULPI)
clock = 48;
if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
!(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
clock = 30;
if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
!(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16))
clock = 60;
if ((usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
!(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
clock = 48;
if ((usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_PHYIF16) &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_UTMI)
clock = 48;
if ((usbcfg & GUSBCFG_PHYSEL) &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
clock = 48;
if ((hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT == HPRT0_SPD_HIGH_SPEED)
/* High speed case */
return 125 * clock - 1;
else
/* FS/LS case */
return 1000 * clock - 1;
}
/**
* dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination
* buffer
*
* @core_if: Programming view of DWC_otg controller
* @dest: Destination buffer for the packet
* @bytes: Number of bytes to copy to the destination
*/
void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes)
{
u32 __iomem *fifo = hsotg->regs + HCFIFO(0);
u32 *data_buf = (u32 *)dest;
int word_count = (bytes + 3) / 4;
int i;
/*
* Todo: Account for the case where dest is not dword aligned. This
* requires reading data from the FIFO into a u32 temp buffer, then
* moving it into the data buffer.
*/
dev_vdbg(hsotg->dev, "%s(%p,%p,%d)\n", __func__, hsotg, dest, bytes);
for (i = 0; i < word_count; i++, data_buf++)
*data_buf = dwc2_readl(fifo);
}
/** /**
* dwc2_dump_host_registers() - Prints the host registers * dwc2_dump_host_registers() - Prints the host registers
* *
......
drivers/usb/dwc2/core.h
浏览文件 @ b02038fa
...@@ -989,34 +989,11 @@ enum dwc2_halt_status { ...@@ -989,34 +989,11 @@ enum dwc2_halt_status {
*/ */
extern int dwc2_core_reset(struct dwc2_hsotg *hsotg); extern int dwc2_core_reset(struct dwc2_hsotg *hsotg);
extern int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg); extern int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg);
extern void dwc2_core_host_init(struct dwc2_hsotg *hsotg);
extern int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg); extern int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg);
extern int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore); extern int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore);
void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg); void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg);
/*
* Host core Functions.
* The following functions support managing the DWC_otg controller in host
* mode.
*/
extern void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan);
extern void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
enum dwc2_halt_status halt_status);
extern void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan);
extern void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan);
extern void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan);
extern int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan);
extern void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan);
extern void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg);
extern void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg);
extern u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg);
extern bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg); extern bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg);
/* /*
...@@ -1028,7 +1005,6 @@ extern void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes); ...@@ -1028,7 +1005,6 @@ extern void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes);
extern void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num); extern void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num);
extern void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg); extern void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg);
extern int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup);
extern void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd); extern void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd);
extern void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd); extern void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd);
......
drivers/usb/dwc2/hcd.c
浏览文件 @ b02038fa
...@@ -54,71 +54,1650 @@ ...@@ -54,71 +54,1650 @@
#include "core.h" #include "core.h"
#include "hcd.h" #include "hcd.h"
/*
* =========================================================================
* Host Core Layer Functions
* =========================================================================
*/
/**
* dwc2_enable_common_interrupts() - Initializes the commmon interrupts,
* used in both device and host modes
*
* @hsotg: Programming view of the DWC_otg controller
*/
static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
{
u32 intmsk;
/* Clear any pending OTG Interrupts */
dwc2_writel(0xffffffff, hsotg->regs + GOTGINT);
/* Clear any pending interrupts */
dwc2_writel(0xffffffff, hsotg->regs + GINTSTS);
/* Enable the interrupts in the GINTMSK */
intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT;
if (hsotg->core_params->dma_enable <= 0)
intmsk |= GINTSTS_RXFLVL;
if (hsotg->core_params->external_id_pin_ctl <= 0)
intmsk |= GINTSTS_CONIDSTSCHNG;
intmsk |= GINTSTS_WKUPINT | GINTSTS_USBSUSP |
GINTSTS_SESSREQINT;
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
}
/*
* Initializes the FSLSPClkSel field of the HCFG register depending on the
* PHY type
*/
static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
{
u32 hcfg, val;
if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
hsotg->core_params->ulpi_fs_ls > 0) ||
hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
/* Full speed PHY */
val = HCFG_FSLSPCLKSEL_48_MHZ;
} else {
/* High speed PHY running at full speed or high speed */
val = HCFG_FSLSPCLKSEL_30_60_MHZ;
}
dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
hcfg = dwc2_readl(hsotg->regs + HCFG);
hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
dwc2_writel(hcfg, hsotg->regs + HCFG);
}
static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
{
u32 usbcfg, i2cctl;
int retval = 0;
/*
* core_init() is now called on every switch so only call the
* following for the first time through
*/
if (select_phy) {
dev_dbg(hsotg->dev, "FS PHY selected\n");
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
if (!(usbcfg & GUSBCFG_PHYSEL)) {
usbcfg |= GUSBCFG_PHYSEL;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/* Reset after a PHY select */
retval = dwc2_core_reset_and_force_dr_mode(hsotg);
if (retval) {
dev_err(hsotg->dev,
"%s: Reset failed, aborting", __func__);
return retval;
}
}
}
/*
* Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
* do this on HNP Dev/Host mode switches (done in dev_init and
* host_init).
*/
if (dwc2_is_host_mode(hsotg))
dwc2_init_fs_ls_pclk_sel(hsotg);
if (hsotg->core_params->i2c_enable > 0) {
dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
/* Program GUSBCFG.OtgUtmiFsSel to I2C */
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/* Program GI2CCTL.I2CEn */
i2cctl = dwc2_readl(hsotg->regs + GI2CCTL);
i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
i2cctl &= ~GI2CCTL_I2CEN;
dwc2_writel(i2cctl, hsotg->regs + GI2CCTL);
i2cctl |= GI2CCTL_I2CEN;
dwc2_writel(i2cctl, hsotg->regs + GI2CCTL);
}
return retval;
}
static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
{
u32 usbcfg, usbcfg_old;
int retval = 0;
if (!select_phy)
return 0;
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg_old = usbcfg;
/*
* HS PHY parameters. These parameters are preserved during soft reset
* so only program the first time. Do a soft reset immediately after
* setting phyif.
*/
switch (hsotg->core_params->phy_type) {
case DWC2_PHY_TYPE_PARAM_ULPI:
/* ULPI interface */
dev_dbg(hsotg->dev, "HS ULPI PHY selected\n");
usbcfg |= GUSBCFG_ULPI_UTMI_SEL;
usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
if (hsotg->core_params->phy_ulpi_ddr > 0)
usbcfg |= GUSBCFG_DDRSEL;
break;
case DWC2_PHY_TYPE_PARAM_UTMI:
/* UTMI+ interface */
dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
if (hsotg->core_params->phy_utmi_width == 16)
usbcfg |= GUSBCFG_PHYIF16;
break;
default:
dev_err(hsotg->dev, "FS PHY selected at HS!\n");
break;
}
if (usbcfg != usbcfg_old) {
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/* Reset after setting the PHY parameters */
retval = dwc2_core_reset_and_force_dr_mode(hsotg);
if (retval) {
dev_err(hsotg->dev,
"%s: Reset failed, aborting", __func__);
return retval;
}
}
return retval;
}
static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
{
u32 usbcfg;
int retval = 0;
if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL &&
hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
/* If FS mode with FS PHY */
retval = dwc2_fs_phy_init(hsotg, select_phy);
if (retval)
return retval;
} else {
/* High speed PHY */
retval = dwc2_hs_phy_init(hsotg, select_phy);
if (retval)
return retval;
}
if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
hsotg->core_params->ulpi_fs_ls > 0) {
dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg |= GUSBCFG_ULPI_FS_LS;
usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
} else {
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg &= ~GUSBCFG_ULPI_FS_LS;
usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
}
return retval;
}
static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg)
{
u32 ahbcfg = dwc2_readl(hsotg->regs + GAHBCFG);
switch (hsotg->hw_params.arch) {
case GHWCFG2_EXT_DMA_ARCH:
dev_err(hsotg->dev, "External DMA Mode not supported\n");
return -EINVAL;
case GHWCFG2_INT_DMA_ARCH:
dev_dbg(hsotg->dev, "Internal DMA Mode\n");
if (hsotg->core_params->ahbcfg != -1) {
ahbcfg &= GAHBCFG_CTRL_MASK;
ahbcfg |= hsotg->core_params->ahbcfg &
~GAHBCFG_CTRL_MASK;
}
break;
case GHWCFG2_SLAVE_ONLY_ARCH:
default:
dev_dbg(hsotg->dev, "Slave Only Mode\n");
break;
}
dev_dbg(hsotg->dev, "dma_enable:%d dma_desc_enable:%d\n",
hsotg->core_params->dma_enable,
hsotg->core_params->dma_desc_enable);
if (hsotg->core_params->dma_enable > 0) {
if (hsotg->core_params->dma_desc_enable > 0)
dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n");
else
dev_dbg(hsotg->dev, "Using Buffer DMA mode\n");
} else {
dev_dbg(hsotg->dev, "Using Slave mode\n");
hsotg->core_params->dma_desc_enable = 0;
}
if (hsotg->core_params->dma_enable > 0)
ahbcfg |= GAHBCFG_DMA_EN;
dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG);
return 0;
}
static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg)
{
u32 usbcfg;
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
usbcfg &= ~(GUSBCFG_HNPCAP | GUSBCFG_SRPCAP);
switch (hsotg->hw_params.op_mode) {
case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
if (hsotg->core_params->otg_cap ==
DWC2_CAP_PARAM_HNP_SRP_CAPABLE)
usbcfg |= GUSBCFG_HNPCAP;
if (hsotg->core_params->otg_cap !=
DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
usbcfg |= GUSBCFG_SRPCAP;
break;
case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
if (hsotg->core_params->otg_cap !=
DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
usbcfg |= GUSBCFG_SRPCAP;
break;
case GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE:
case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST:
default:
break;
}
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
}
/**
* dwc2_enable_host_interrupts() - Enables the Host mode interrupts
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg)
{
u32 intmsk;
dev_dbg(hsotg->dev, "%s()\n", __func__);
/* Disable all interrupts */
dwc2_writel(0, hsotg->regs + GINTMSK);
dwc2_writel(0, hsotg->regs + HAINTMSK);
/* Enable the common interrupts */
dwc2_enable_common_interrupts(hsotg);
/* Enable host mode interrupts without disturbing common interrupts */
intmsk = dwc2_readl(hsotg->regs + GINTMSK);
intmsk |= GINTSTS_DISCONNINT | GINTSTS_PRTINT | GINTSTS_HCHINT;
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
}
/**
* dwc2_disable_host_interrupts() - Disables the Host Mode interrupts
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg)
{
u32 intmsk = dwc2_readl(hsotg->regs + GINTMSK);
/* Disable host mode interrupts without disturbing common interrupts */
intmsk &= ~(GINTSTS_SOF | GINTSTS_PRTINT | GINTSTS_HCHINT |
GINTSTS_PTXFEMP | GINTSTS_NPTXFEMP | GINTSTS_DISCONNINT);
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
}
/*
* dwc2_calculate_dynamic_fifo() - Calculates the default fifo size
* For system that have a total fifo depth that is smaller than the default
* RX + TX fifo size.
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_calculate_dynamic_fifo(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *params = hsotg->core_params;
struct dwc2_hw_params *hw = &hsotg->hw_params;
u32 rxfsiz, nptxfsiz, ptxfsiz, total_fifo_size;
total_fifo_size = hw->total_fifo_size;
rxfsiz = params->host_rx_fifo_size;
nptxfsiz = params->host_nperio_tx_fifo_size;
ptxfsiz = params->host_perio_tx_fifo_size;
/*
* Will use Method 2 defined in the DWC2 spec: minimum FIFO depth
* allocation with support for high bandwidth endpoints. Synopsys
* defines MPS(Max Packet size) for a periodic EP=1024, and for
* non-periodic as 512.
*/
if (total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz)) {
/*
* For Buffer DMA mode/Scatter Gather DMA mode
* 2 * ((Largest Packet size / 4) + 1 + 1) + n
* with n = number of host channel.
* 2 * ((1024/4) + 2) = 516
*/
rxfsiz = 516 + hw->host_channels;
/*
* min non-periodic tx fifo depth
* 2 * (largest non-periodic USB packet used / 4)
* 2 * (512/4) = 256
*/
nptxfsiz = 256;
/*
* min periodic tx fifo depth
* (largest packet size*MC)/4
* (1024 * 3)/4 = 768
*/
ptxfsiz = 768;
params->host_rx_fifo_size = rxfsiz;
params->host_nperio_tx_fifo_size = nptxfsiz;
params->host_perio_tx_fifo_size = ptxfsiz;
}
/*
* If the summation of RX, NPTX and PTX fifo sizes is still
* bigger than the total_fifo_size, then we have a problem.
*
* We won't be able to allocate as many endpoints. Right now,
* we're just printing an error message, but ideally this FIFO
* allocation algorithm would be improved in the future.
*
* FIXME improve this FIFO allocation algorithm.
*/
if (unlikely(total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz)))
dev_err(hsotg->dev, "invalid fifo sizes\n");
}
static void dwc2_config_fifos(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *params = hsotg->core_params;
u32 nptxfsiz, hptxfsiz, dfifocfg, grxfsiz;
if (!params->enable_dynamic_fifo)
return;
dwc2_calculate_dynamic_fifo(hsotg);
/* Rx FIFO */
grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
dev_dbg(hsotg->dev, "initial grxfsiz=%08x\n", grxfsiz);
grxfsiz &= ~GRXFSIZ_DEPTH_MASK;
grxfsiz |= params->host_rx_fifo_size <<
GRXFSIZ_DEPTH_SHIFT & GRXFSIZ_DEPTH_MASK;
dwc2_writel(grxfsiz, hsotg->regs + GRXFSIZ);
dev_dbg(hsotg->dev, "new grxfsiz=%08x\n",
dwc2_readl(hsotg->regs + GRXFSIZ));
/* Non-periodic Tx FIFO */
dev_dbg(hsotg->dev, "initial gnptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + GNPTXFSIZ));
nptxfsiz = params->host_nperio_tx_fifo_size <<
FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
nptxfsiz |= params->host_rx_fifo_size <<
FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
dwc2_writel(nptxfsiz, hsotg->regs + GNPTXFSIZ);
dev_dbg(hsotg->dev, "new gnptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + GNPTXFSIZ));
/* Periodic Tx FIFO */
dev_dbg(hsotg->dev, "initial hptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + HPTXFSIZ));
hptxfsiz = params->host_perio_tx_fifo_size <<
FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
hptxfsiz |= (params->host_rx_fifo_size +
params->host_nperio_tx_fifo_size) <<
FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
dwc2_writel(hptxfsiz, hsotg->regs + HPTXFSIZ);
dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n",
dwc2_readl(hsotg->regs + HPTXFSIZ));
if (hsotg->core_params->en_multiple_tx_fifo > 0 &&
hsotg->hw_params.snpsid <= DWC2_CORE_REV_2_94a) {
/*
* Global DFIFOCFG calculation for Host mode -
* include RxFIFO, NPTXFIFO and HPTXFIFO
*/
dfifocfg = dwc2_readl(hsotg->regs + GDFIFOCFG);
dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK;
dfifocfg |= (params->host_rx_fifo_size +
params->host_nperio_tx_fifo_size +
params->host_perio_tx_fifo_size) <<
GDFIFOCFG_EPINFOBASE_SHIFT &
GDFIFOCFG_EPINFOBASE_MASK;
dwc2_writel(dfifocfg, hsotg->regs + GDFIFOCFG);
}
}
/**
* dwc2_calc_frame_interval() - Calculates the correct frame Interval value for
* the HFIR register according to PHY type and speed
*
* @hsotg: Programming view of DWC_otg controller
*
* NOTE: The caller can modify the value of the HFIR register only after the
* Port Enable bit of the Host Port Control and Status register (HPRT.EnaPort)
* has been set
*/
u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg)
{
u32 usbcfg;
u32 hprt0;
int clock = 60; /* default value */
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
hprt0 = dwc2_readl(hsotg->regs + HPRT0);
if (!(usbcfg & GUSBCFG_PHYSEL) && (usbcfg & GUSBCFG_ULPI_UTMI_SEL) &&
!(usbcfg & GUSBCFG_PHYIF16))
clock = 60;
if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type ==
GHWCFG2_FS_PHY_TYPE_SHARED_ULPI)
clock = 48;
if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
!(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
clock = 30;
if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
!(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16))
clock = 60;
if ((usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
!(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
clock = 48;
if ((usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_PHYIF16) &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_UTMI)
clock = 48;
if ((usbcfg & GUSBCFG_PHYSEL) &&
hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
clock = 48;
if ((hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT == HPRT0_SPD_HIGH_SPEED)
/* High speed case */
return 125 * clock - 1;
/* FS/LS case */
return 1000 * clock - 1;
}
/**
* dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination
* buffer
*
* @core_if: Programming view of DWC_otg controller
* @dest: Destination buffer for the packet
* @bytes: Number of bytes to copy to the destination
*/
void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes)
{
u32 __iomem *fifo = hsotg->regs + HCFIFO(0);
u32 *data_buf = (u32 *)dest;
int word_count = (bytes + 3) / 4;
int i;
/*
* Todo: Account for the case where dest is not dword aligned. This
* requires reading data from the FIFO into a u32 temp buffer, then
* moving it into the data buffer.
*/
dev_vdbg(hsotg->dev, "%s(%p,%p,%d)\n", __func__, hsotg, dest, bytes);
for (i = 0; i < word_count; i++, data_buf++)
*data_buf = dwc2_readl(fifo);
}
/**
* dwc2_dump_channel_info() - Prints the state of a host channel
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Pointer to the channel to dump
*
* Must be called with interrupt disabled and spinlock held
*
* NOTE: This function will be removed once the peripheral controller code
* is integrated and the driver is stable
*/
static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
#ifdef VERBOSE_DEBUG
int num_channels = hsotg->core_params->host_channels;
struct dwc2_qh *qh;
u32 hcchar;
u32 hcsplt;
u32 hctsiz;
u32 hc_dma;
int i;
if (!chan)
return;
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcsplt = dwc2_readl(hsotg->regs + HCSPLT(chan->hc_num));
hctsiz = dwc2_readl(hsotg->regs + HCTSIZ(chan->hc_num));
hc_dma = dwc2_readl(hsotg->regs + HCDMA(chan->hc_num));
dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan);
dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n",
hcchar, hcsplt);
dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n",
hctsiz, hc_dma);
dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
chan->dev_addr, chan->ep_num, chan->ep_is_in);
dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start);
dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started);
dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
(unsigned long)chan->xfer_dma);
dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
dev_dbg(hsotg->dev, " NP inactive sched:\n");
list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive,
qh_list_entry)
dev_dbg(hsotg->dev, " %p\n", qh);
dev_dbg(hsotg->dev, " NP active sched:\n");
list_for_each_entry(qh, &hsotg->non_periodic_sched_active,
qh_list_entry)
dev_dbg(hsotg->dev, " %p\n", qh);
dev_dbg(hsotg->dev, " Channels:\n");
for (i = 0; i < num_channels; i++) {
struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
dev_dbg(hsotg->dev, " %2d: %p\n", i, chan);
}
#endif /* VERBOSE_DEBUG */
}
/*
* =========================================================================
* Low Level Host Channel Access Functions
* =========================================================================
*/
static void dwc2_hc_enable_slave_ints(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcintmsk = HCINTMSK_CHHLTD;
switch (chan->ep_type) {
case USB_ENDPOINT_XFER_CONTROL:
case USB_ENDPOINT_XFER_BULK:
dev_vdbg(hsotg->dev, "control/bulk\n");
hcintmsk |= HCINTMSK_XFERCOMPL;
hcintmsk |= HCINTMSK_STALL;
hcintmsk |= HCINTMSK_XACTERR;
hcintmsk |= HCINTMSK_DATATGLERR;
if (chan->ep_is_in) {
hcintmsk |= HCINTMSK_BBLERR;
} else {
hcintmsk |= HCINTMSK_NAK;
hcintmsk |= HCINTMSK_NYET;
if (chan->do_ping)
hcintmsk |= HCINTMSK_ACK;
}
if (chan->do_split) {
hcintmsk |= HCINTMSK_NAK;
if (chan->complete_split)
hcintmsk |= HCINTMSK_NYET;
else
hcintmsk |= HCINTMSK_ACK;
}
if (chan->error_state)
hcintmsk |= HCINTMSK_ACK;
break;
case USB_ENDPOINT_XFER_INT:
if (dbg_perio())
dev_vdbg(hsotg->dev, "intr\n");
hcintmsk |= HCINTMSK_XFERCOMPL;
hcintmsk |= HCINTMSK_NAK;
hcintmsk |= HCINTMSK_STALL;
hcintmsk |= HCINTMSK_XACTERR;
hcintmsk |= HCINTMSK_DATATGLERR;
hcintmsk |= HCINTMSK_FRMOVRUN;
if (chan->ep_is_in)
hcintmsk |= HCINTMSK_BBLERR;
if (chan->error_state)
hcintmsk |= HCINTMSK_ACK;
if (chan->do_split) {
if (chan->complete_split)
hcintmsk |= HCINTMSK_NYET;
else
hcintmsk |= HCINTMSK_ACK;
}
break;
case USB_ENDPOINT_XFER_ISOC:
if (dbg_perio())
dev_vdbg(hsotg->dev, "isoc\n");
hcintmsk |= HCINTMSK_XFERCOMPL;
hcintmsk |= HCINTMSK_FRMOVRUN;
hcintmsk |= HCINTMSK_ACK;
if (chan->ep_is_in) {
hcintmsk |= HCINTMSK_XACTERR;
hcintmsk |= HCINTMSK_BBLERR;
}
break;
default:
dev_err(hsotg->dev, "## Unknown EP type ##\n");
break;
}
dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
}
static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcintmsk = HCINTMSK_CHHLTD;
/*
* For Descriptor DMA mode core halts the channel on AHB error.
* Interrupt is not required.
*/
if (hsotg->core_params->dma_desc_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "desc DMA disabled\n");
hcintmsk |= HCINTMSK_AHBERR;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "desc DMA enabled\n");
if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
hcintmsk |= HCINTMSK_XFERCOMPL;
}
if (chan->error_state && !chan->do_split &&
chan->ep_type != USB_ENDPOINT_XFER_ISOC) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "setting ACK\n");
hcintmsk |= HCINTMSK_ACK;
if (chan->ep_is_in) {
hcintmsk |= HCINTMSK_DATATGLERR;
if (chan->ep_type != USB_ENDPOINT_XFER_INT)
hcintmsk |= HCINTMSK_NAK;
}
}
dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
}
static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 intmsk;
if (hsotg->core_params->dma_enable > 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA enabled\n");
dwc2_hc_enable_dma_ints(hsotg, chan);
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA disabled\n");
dwc2_hc_enable_slave_ints(hsotg, chan);
}
/* Enable the top level host channel interrupt */
intmsk = dwc2_readl(hsotg->regs + HAINTMSK);
intmsk |= 1 << chan->hc_num;
dwc2_writel(intmsk, hsotg->regs + HAINTMSK);
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set HAINTMSK to %08x\n", intmsk);
/* Make sure host channel interrupts are enabled */
intmsk = dwc2_readl(hsotg->regs + GINTMSK);
intmsk |= GINTSTS_HCHINT;
dwc2_writel(intmsk, hsotg->regs + GINTMSK);
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "set GINTMSK to %08x\n", intmsk);
}
/**
* dwc2_hc_init() - Prepares a host channel for transferring packets to/from
* a specific endpoint
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* The HCCHARn register is set up with the characteristics specified in chan.
* Host channel interrupts that may need to be serviced while this transfer is
* in progress are enabled.
*/
static void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
{
u8 hc_num = chan->hc_num;
u32 hcintmsk;
u32 hcchar;
u32 hcsplt = 0;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
/* Clear old interrupt conditions for this host channel */
hcintmsk = 0xffffffff;
hcintmsk &= ~HCINTMSK_RESERVED14_31;
dwc2_writel(hcintmsk, hsotg->regs + HCINT(hc_num));
/* Enable channel interrupts required for this transfer */
dwc2_hc_enable_ints(hsotg, chan);
/*
* Program the HCCHARn register with the endpoint characteristics for
* the current transfer
*/
hcchar = chan->dev_addr << HCCHAR_DEVADDR_SHIFT & HCCHAR_DEVADDR_MASK;
hcchar |= chan->ep_num << HCCHAR_EPNUM_SHIFT & HCCHAR_EPNUM_MASK;
if (chan->ep_is_in)
hcchar |= HCCHAR_EPDIR;
if (chan->speed == USB_SPEED_LOW)
hcchar |= HCCHAR_LSPDDEV;
hcchar |= chan->ep_type << HCCHAR_EPTYPE_SHIFT & HCCHAR_EPTYPE_MASK;
hcchar |= chan->max_packet << HCCHAR_MPS_SHIFT & HCCHAR_MPS_MASK;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(hc_num));
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "set HCCHAR(%d) to %08x\n",
hc_num, hcchar);
dev_vdbg(hsotg->dev, "%s: Channel %d\n",
__func__, hc_num);
dev_vdbg(hsotg->dev, " Dev Addr: %d\n",
chan->dev_addr);
dev_vdbg(hsotg->dev, " Ep Num: %d\n",
chan->ep_num);
dev_vdbg(hsotg->dev, " Is In: %d\n",
chan->ep_is_in);
dev_vdbg(hsotg->dev, " Is Low Speed: %d\n",
chan->speed == USB_SPEED_LOW);
dev_vdbg(hsotg->dev, " Ep Type: %d\n",
chan->ep_type);
dev_vdbg(hsotg->dev, " Max Pkt: %d\n",
chan->max_packet);
}
/* Program the HCSPLT register for SPLITs */
if (chan->do_split) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev,
"Programming HC %d with split --> %s\n",
hc_num,
chan->complete_split ? "CSPLIT" : "SSPLIT");
if (chan->complete_split)
hcsplt |= HCSPLT_COMPSPLT;
hcsplt |= chan->xact_pos << HCSPLT_XACTPOS_SHIFT &
HCSPLT_XACTPOS_MASK;
hcsplt |= chan->hub_addr << HCSPLT_HUBADDR_SHIFT &
HCSPLT_HUBADDR_MASK;
hcsplt |= chan->hub_port << HCSPLT_PRTADDR_SHIFT &
HCSPLT_PRTADDR_MASK;
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, " comp split %d\n",
chan->complete_split);
dev_vdbg(hsotg->dev, " xact pos %d\n",
chan->xact_pos);
dev_vdbg(hsotg->dev, " hub addr %d\n",
chan->hub_addr);
dev_vdbg(hsotg->dev, " hub port %d\n",
chan->hub_port);
dev_vdbg(hsotg->dev, " is_in %d\n",
chan->ep_is_in);
dev_vdbg(hsotg->dev, " Max Pkt %d\n",
chan->max_packet);
dev_vdbg(hsotg->dev, " xferlen %d\n",
chan->xfer_len);
}
}
dwc2_writel(hcsplt, hsotg->regs + HCSPLT(hc_num));
}
/**
* dwc2_hc_halt() - Attempts to halt a host channel
*
* @hsotg: Controller register interface
* @chan: Host channel to halt
* @halt_status: Reason for halting the channel
*
* This function should only be called in Slave mode or to abort a transfer in
* either Slave mode or DMA mode. Under normal circumstances in DMA mode, the
* controller halts the channel when the transfer is complete or a condition
* occurs that requires application intervention.
*
* In slave mode, checks for a free request queue entry, then sets the Channel
* Enable and Channel Disable bits of the Host Channel Characteristics
* register of the specified channel to intiate the halt. If there is no free
* request queue entry, sets only the Channel Disable bit of the HCCHARn
* register to flush requests for this channel. In the latter case, sets a
* flag to indicate that the host channel needs to be halted when a request
* queue slot is open.
*
* In DMA mode, always sets the Channel Enable and Channel Disable bits of the
* HCCHARn register. The controller ensures there is space in the request
* queue before submitting the halt request.
*
* Some time may elapse before the core flushes any posted requests for this
* host channel and halts. The Channel Halted interrupt handler completes the
* deactivation of the host channel.
*/
void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
enum dwc2_halt_status halt_status)
{
u32 nptxsts, hptxsts, hcchar;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS)
dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status);
if (halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
halt_status == DWC2_HC_XFER_AHB_ERR) {
/*
* Disable all channel interrupts except Ch Halted. The QTD
* and QH state associated with this transfer has been cleared
* (in the case of URB_DEQUEUE), so the channel needs to be
* shut down carefully to prevent crashes.
*/
u32 hcintmsk = HCINTMSK_CHHLTD;
dev_vdbg(hsotg->dev, "dequeue/error\n");
dwc2_writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
/*
* Make sure no other interrupts besides halt are currently
* pending. Handling another interrupt could cause a crash due
* to the QTD and QH state.
*/
dwc2_writel(~hcintmsk, hsotg->regs + HCINT(chan->hc_num));
/*
* Make sure the halt status is set to URB_DEQUEUE or AHB_ERR
* even if the channel was already halted for some other
* reason
*/
chan->halt_status = halt_status;
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
if (!(hcchar & HCCHAR_CHENA)) {
/*
* The channel is either already halted or it hasn't
* started yet. In DMA mode, the transfer may halt if
* it finishes normally or a condition occurs that
* requires driver intervention. Don't want to halt
* the channel again. In either Slave or DMA mode,
* it's possible that the transfer has been assigned
* to a channel, but not started yet when an URB is
* dequeued. Don't want to halt a channel that hasn't
* started yet.
*/
return;
}
}
if (chan->halt_pending) {
/*
* A halt has already been issued for this channel. This might
* happen when a transfer is aborted by a higher level in
* the stack.
*/
dev_vdbg(hsotg->dev,
"*** %s: Channel %d, chan->halt_pending already set ***\n",
__func__, chan->hc_num);
return;
}
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
/* No need to set the bit in DDMA for disabling the channel */
/* TODO check it everywhere channel is disabled */
if (hsotg->core_params->dma_desc_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "desc DMA disabled\n");
hcchar |= HCCHAR_CHENA;
} else {
if (dbg_hc(chan))
dev_dbg(hsotg->dev, "desc DMA enabled\n");
}
hcchar |= HCCHAR_CHDIS;
if (hsotg->core_params->dma_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA not enabled\n");
hcchar |= HCCHAR_CHENA;
/* Check for space in the request queue to issue the halt */
if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
chan->ep_type == USB_ENDPOINT_XFER_BULK) {
dev_vdbg(hsotg->dev, "control/bulk\n");
nptxsts = dwc2_readl(hsotg->regs + GNPTXSTS);
if ((nptxsts & TXSTS_QSPCAVAIL_MASK) == 0) {
dev_vdbg(hsotg->dev, "Disabling channel\n");
hcchar &= ~HCCHAR_CHENA;
}
} else {
if (dbg_perio())
dev_vdbg(hsotg->dev, "isoc/intr\n");
hptxsts = dwc2_readl(hsotg->regs + HPTXSTS);
if ((hptxsts & TXSTS_QSPCAVAIL_MASK) == 0 ||
hsotg->queuing_high_bandwidth) {
if (dbg_perio())
dev_vdbg(hsotg->dev, "Disabling channel\n");
hcchar &= ~HCCHAR_CHENA;
}
}
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "DMA enabled\n");
}
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
chan->halt_status = halt_status;
if (hcchar & HCCHAR_CHENA) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Channel enabled\n");
chan->halt_pending = 1;
chan->halt_on_queue = 0;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Channel disabled\n");
chan->halt_on_queue = 1;
}
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
dev_vdbg(hsotg->dev, " hcchar: 0x%08x\n",
hcchar);
dev_vdbg(hsotg->dev, " halt_pending: %d\n",
chan->halt_pending);
dev_vdbg(hsotg->dev, " halt_on_queue: %d\n",
chan->halt_on_queue);
dev_vdbg(hsotg->dev, " halt_status: %d\n",
chan->halt_status);
}
}
/**
* dwc2_hc_cleanup() - Clears the transfer state for a host channel
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Identifies the host channel to clean up
*
* This function is normally called after a transfer is done and the host
* channel is being released
*/
void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
{
u32 hcintmsk;
chan->xfer_started = 0;
list_del_init(&chan->split_order_list_entry);
/*
* Clear channel interrupt enables and any unhandled channel interrupt
* conditions
*/
dwc2_writel(0, hsotg->regs + HCINTMSK(chan->hc_num));
hcintmsk = 0xffffffff;
hcintmsk &= ~HCINTMSK_RESERVED14_31;
dwc2_writel(hcintmsk, hsotg->regs + HCINT(chan->hc_num));
}
/**
* dwc2_hc_set_even_odd_frame() - Sets the channel property that indicates in
* which frame a periodic transfer should occur
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Identifies the host channel to set up and its properties
* @hcchar: Current value of the HCCHAR register for the specified host channel
*
* This function has no effect on non-periodic transfers
*/
static void dwc2_hc_set_even_odd_frame(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan, u32 *hcchar)
{
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
int host_speed;
int xfer_ns;
int xfer_us;
int bytes_in_fifo;
u16 fifo_space;
u16 frame_number;
u16 wire_frame;
/*
* Try to figure out if we're an even or odd frame. If we set
* even and the current frame number is even the the transfer
* will happen immediately. Similar if both are odd. If one is
* even and the other is odd then the transfer will happen when
* the frame number ticks.
*
* There's a bit of a balancing act to get this right.
* Sometimes we may want to send data in the current frame (AK
* right away). We might want to do this if the frame number
* _just_ ticked, but we might also want to do this in order
* to continue a split transaction that happened late in a
* microframe (so we didn't know to queue the next transfer
* until the frame number had ticked). The problem is that we
* need a lot of knowledge to know if there's actually still
* time to send things or if it would be better to wait until
* the next frame.
*
* We can look at how much time is left in the current frame
* and make a guess about whether we'll have time to transfer.
* We'll do that.
*/
/* Get speed host is running at */
host_speed = (chan->speed != USB_SPEED_HIGH &&
!chan->do_split) ? chan->speed : USB_SPEED_HIGH;
/* See how many bytes are in the periodic FIFO right now */
fifo_space = (dwc2_readl(hsotg->regs + HPTXSTS) &
TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT;
bytes_in_fifo = sizeof(u32) *
(hsotg->core_params->host_perio_tx_fifo_size -
fifo_space);
/*
* Roughly estimate bus time for everything in the periodic
* queue + our new transfer. This is "rough" because we're
* using a function that makes takes into account IN/OUT
* and INT/ISO and we're just slamming in one value for all
* transfers. This should be an over-estimate and that should
* be OK, but we can probably tighten it.
*/
xfer_ns = usb_calc_bus_time(host_speed, false, false,
chan->xfer_len + bytes_in_fifo);
xfer_us = NS_TO_US(xfer_ns);
/* See what frame number we'll be at by the time we finish */
frame_number = dwc2_hcd_get_future_frame_number(hsotg, xfer_us);
/* This is when we were scheduled to be on the wire */
wire_frame = dwc2_frame_num_inc(chan->qh->next_active_frame, 1);
/*
* If we'd finish _after_ the frame we're scheduled in then
* it's hopeless. Just schedule right away and hope for the
* best. Note that it _might_ be wise to call back into the
* scheduler to pick a better frame, but this is better than
* nothing.
*/
if (dwc2_frame_num_gt(frame_number, wire_frame)) {
dwc2_sch_vdbg(hsotg,
"QH=%p EO MISS fr=%04x=>%04x (%+d)\n",
chan->qh, wire_frame, frame_number,
dwc2_frame_num_dec(frame_number,
wire_frame));
wire_frame = frame_number;
/*
* We picked a different frame number; communicate this
* back to the scheduler so it doesn't try to schedule
* another in the same frame.
*
* Remember that next_active_frame is 1 before the wire
* frame.
*/
chan->qh->next_active_frame =
dwc2_frame_num_dec(frame_number, 1);
}
if (wire_frame & 1)
*hcchar |= HCCHAR_ODDFRM;
else
*hcchar &= ~HCCHAR_ODDFRM;
}
}
static void dwc2_set_pid_isoc(struct dwc2_host_chan *chan)
{
/* Set up the initial PID for the transfer */
if (chan->speed == USB_SPEED_HIGH) {
if (chan->ep_is_in) {
if (chan->multi_count == 1)
chan->data_pid_start = DWC2_HC_PID_DATA0;
else if (chan->multi_count == 2)
chan->data_pid_start = DWC2_HC_PID_DATA1;
else
chan->data_pid_start = DWC2_HC_PID_DATA2;
} else {
if (chan->multi_count == 1)
chan->data_pid_start = DWC2_HC_PID_DATA0;
else
chan->data_pid_start = DWC2_HC_PID_MDATA;
}
} else {
chan->data_pid_start = DWC2_HC_PID_DATA0;
}
}
/**
* dwc2_hc_write_packet() - Writes a packet into the Tx FIFO associated with
* the Host Channel
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* This function should only be called in Slave mode. For a channel associated
* with a non-periodic EP, the non-periodic Tx FIFO is written. For a channel
* associated with a periodic EP, the periodic Tx FIFO is written.
*
* Upon return the xfer_buf and xfer_count fields in chan are incremented by
* the number of bytes written to the Tx FIFO.
*/
static void dwc2_hc_write_packet(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 i;
u32 remaining_count;
u32 byte_count;
u32 dword_count;
u32 __iomem *data_fifo;
u32 *data_buf = (u32 *)chan->xfer_buf;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
data_fifo = (u32 __iomem *)(hsotg->regs + HCFIFO(chan->hc_num));
remaining_count = chan->xfer_len - chan->xfer_count;
if (remaining_count > chan->max_packet)
byte_count = chan->max_packet;
else
byte_count = remaining_count;
dword_count = (byte_count + 3) / 4;
if (((unsigned long)data_buf & 0x3) == 0) {
/* xfer_buf is DWORD aligned */
for (i = 0; i < dword_count; i++, data_buf++)
dwc2_writel(*data_buf, data_fifo);
} else {
/* xfer_buf is not DWORD aligned */
for (i = 0; i < dword_count; i++, data_buf++) {
u32 data = data_buf[0] | data_buf[1] << 8 |
data_buf[2] << 16 | data_buf[3] << 24;
dwc2_writel(data, data_fifo);
}
}
chan->xfer_count += byte_count;
chan->xfer_buf += byte_count;
}
/** /**
* dwc2_dump_channel_info() - Prints the state of a host channel * dwc2_hc_do_ping() - Starts a PING transfer
* *
* @hsotg: Programming view of DWC_otg controller * @hsotg: Programming view of DWC_otg controller
* @chan: Pointer to the channel to dump * @chan: Information needed to initialize the host channel
* *
* Must be called with interrupt disabled and spinlock held * This function should only be called in Slave mode. The Do Ping bit is set in
* the HCTSIZ register, then the channel is enabled.
*/
static void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcchar;
u32 hctsiz;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
hctsiz = TSIZ_DOPNG;
hctsiz |= 1 << TSIZ_PKTCNT_SHIFT;
dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
}
/**
* dwc2_hc_start_transfer() - Does the setup for a data transfer for a host
* channel and starts the transfer
* *
* NOTE: This function will be removed once the peripheral controller code * @hsotg: Programming view of DWC_otg controller
* is integrated and the driver is stable * @chan: Information needed to initialize the host channel. The xfer_len value
* may be reduced to accommodate the max widths of the XferSize and
* PktCnt fields in the HCTSIZn register. The multi_count value may be
* changed to reflect the final xfer_len value.
*
* This function may be called in either Slave mode or DMA mode. In Slave mode,
* the caller must ensure that there is sufficient space in the request queue
* and Tx Data FIFO.
*
* For an OUT transfer in Slave mode, it loads a data packet into the
* appropriate FIFO. If necessary, additional data packets are loaded in the
* Host ISR.
*
* For an IN transfer in Slave mode, a data packet is requested. The data
* packets are unloaded from the Rx FIFO in the Host ISR. If necessary,
* additional data packets are requested in the Host ISR.
*
* For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ
* register along with a packet count of 1 and the channel is enabled. This
* causes a single PING transaction to occur. Other fields in HCTSIZ are
* simply set to 0 since no data transfer occurs in this case.
*
* For a PING transfer in DMA mode, the HCTSIZ register is initialized with
* all the information required to perform the subsequent data transfer. In
* addition, the Do Ping bit is set in the HCTSIZ register. In this case, the
* controller performs the entire PING protocol, then starts the data
* transfer.
*/ */
static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg, static void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan) struct dwc2_host_chan *chan)
{ {
#ifdef VERBOSE_DEBUG u32 max_hc_xfer_size = hsotg->core_params->max_transfer_size;
int num_channels = hsotg->core_params->host_channels; u16 max_hc_pkt_count = hsotg->core_params->max_packet_count;
struct dwc2_qh *qh;
u32 hcchar; u32 hcchar;
u32 hcsplt; u32 hctsiz = 0;
u32 hctsiz; u16 num_packets;
u32 hc_dma; u32 ec_mc;
int i;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s()\n", __func__);
if (chan->do_ping) {
if (hsotg->core_params->dma_enable <= 0) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "ping, no DMA\n");
dwc2_hc_do_ping(hsotg, chan);
chan->xfer_started = 1;
return;
}
if (chan == NULL) if (dbg_hc(chan))
return; dev_vdbg(hsotg->dev, "ping, DMA\n");
hctsiz |= TSIZ_DOPNG;
}
if (chan->do_split) {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "split\n");
num_packets = 1;
if (chan->complete_split && !chan->ep_is_in)
/*
* For CSPLIT OUT Transfer, set the size to 0 so the
* core doesn't expect any data written to the FIFO
*/
chan->xfer_len = 0;
else if (chan->ep_is_in || chan->xfer_len > chan->max_packet)
chan->xfer_len = chan->max_packet;
else if (!chan->ep_is_in && chan->xfer_len > 188)
chan->xfer_len = 188;
hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
TSIZ_XFERSIZE_MASK;
/* For split set ec_mc for immediate retries */
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC)
ec_mc = 3;
else
ec_mc = 1;
} else {
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "no split\n");
/*
* Ensure that the transfer length and packet count will fit
* in the widths allocated for them in the HCTSIZn register
*/
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
/*
* Make sure the transfer size is no larger than one
* (micro)frame's worth of data. (A check was done
* when the periodic transfer was accepted to ensure
* that a (micro)frame's worth of data can be
* programmed into a channel.)
*/
u32 max_periodic_len =
chan->multi_count * chan->max_packet;
if (chan->xfer_len > max_periodic_len)
chan->xfer_len = max_periodic_len;
} else if (chan->xfer_len > max_hc_xfer_size) {
/*
* Make sure that xfer_len is a multiple of max packet
* size
*/
chan->xfer_len =
max_hc_xfer_size - chan->max_packet + 1;
}
if (chan->xfer_len > 0) {
num_packets = (chan->xfer_len + chan->max_packet - 1) /
chan->max_packet;
if (num_packets > max_hc_pkt_count) {
num_packets = max_hc_pkt_count;
chan->xfer_len = num_packets * chan->max_packet;
}
} else {
/* Need 1 packet for transfer length of 0 */
num_packets = 1;
}
if (chan->ep_is_in)
/*
* Always program an integral # of max packets for IN
* transfers
*/
chan->xfer_len = num_packets * chan->max_packet;
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC)
/*
* Make sure that the multi_count field matches the
* actual transfer length
*/
chan->multi_count = num_packets;
if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
dwc2_set_pid_isoc(chan);
hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
TSIZ_XFERSIZE_MASK;
/* The ec_mc gets the multi_count for non-split */
ec_mc = chan->multi_count;
}
chan->start_pkt_count = num_packets;
hctsiz |= num_packets << TSIZ_PKTCNT_SHIFT & TSIZ_PKTCNT_MASK;
hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
TSIZ_SC_MC_PID_MASK;
dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "Wrote %08x to HCTSIZ(%d)\n",
hctsiz, chan->hc_num);
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
dev_vdbg(hsotg->dev, " Xfer Size: %d\n",
(hctsiz & TSIZ_XFERSIZE_MASK) >>
TSIZ_XFERSIZE_SHIFT);
dev_vdbg(hsotg->dev, " Num Pkts: %d\n",
(hctsiz & TSIZ_PKTCNT_MASK) >>
TSIZ_PKTCNT_SHIFT);
dev_vdbg(hsotg->dev, " Start PID: %d\n",
(hctsiz & TSIZ_SC_MC_PID_MASK) >>
TSIZ_SC_MC_PID_SHIFT);
}
if (hsotg->core_params->dma_enable > 0) {
dwc2_writel((u32)chan->xfer_dma,
hsotg->regs + HCDMA(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %08lx to HCDMA(%d)\n",
(unsigned long)chan->xfer_dma, chan->hc_num);
}
/* Start the split */
if (chan->do_split) {
u32 hcsplt = dwc2_readl(hsotg->regs + HCSPLT(chan->hc_num));
hcsplt |= HCSPLT_SPLTENA;
dwc2_writel(hcsplt, hsotg->regs + HCSPLT(chan->hc_num));
}
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num)); hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcsplt = dwc2_readl(hsotg->regs + HCSPLT(chan->hc_num)); hcchar &= ~HCCHAR_MULTICNT_MASK;
hctsiz = dwc2_readl(hsotg->regs + HCTSIZ(chan->hc_num)); hcchar |= (ec_mc << HCCHAR_MULTICNT_SHIFT) & HCCHAR_MULTICNT_MASK;
hc_dma = dwc2_readl(hsotg->regs + HCDMA(chan->hc_num)); dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan); if (hcchar & HCCHAR_CHDIS)
dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", dev_warn(hsotg->dev,
hcchar, hcsplt); "%s: chdis set, channel %d, hcchar 0x%08x\n",
dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", __func__, chan->hc_num, hcchar);
hctsiz, hc_dma);
dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n", /* Set host channel enable after all other setup is complete */
chan->dev_addr, chan->ep_num, chan->ep_is_in); hcchar |= HCCHAR_CHENA;
dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type); hcchar &= ~HCCHAR_CHDIS;
dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start); if (dbg_hc(chan))
dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started); dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); (hcchar & HCCHAR_MULTICNT_MASK) >>
dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf); HCCHAR_MULTICNT_SHIFT);
dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
(unsigned long)chan->xfer_dma); dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len); if (dbg_hc(chan))
dev_dbg(hsotg->dev, " qh: %p\n", chan->qh); dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
dev_dbg(hsotg->dev, " NP inactive sched:\n"); chan->hc_num);
list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive,
qh_list_entry) chan->xfer_started = 1;
dev_dbg(hsotg->dev, " %p\n", qh); chan->requests++;
dev_dbg(hsotg->dev, " NP active sched:\n");
list_for_each_entry(qh, &hsotg->non_periodic_sched_active, if (hsotg->core_params->dma_enable <= 0 &&
qh_list_entry) !chan->ep_is_in && chan->xfer_len > 0)
dev_dbg(hsotg->dev, " %p\n", qh); /* Load OUT packet into the appropriate Tx FIFO */
dev_dbg(hsotg->dev, " Channels:\n"); dwc2_hc_write_packet(hsotg, chan);
for (i = 0; i < num_channels; i++) { }
struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
dev_dbg(hsotg->dev, " %2d: %p\n", i, chan); /**
* dwc2_hc_start_transfer_ddma() - Does the setup for a data transfer for a
* host channel and starts the transfer in Descriptor DMA mode
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set.
* Sets PID and NTD values. For periodic transfers initializes SCHED_INFO field
* with micro-frame bitmap.
*
* Initializes HCDMA register with descriptor list address and CTD value then
* starts the transfer via enabling the channel.
*/
void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
u32 hcchar;
u32 hctsiz = 0;
if (chan->do_ping)
hctsiz |= TSIZ_DOPNG;
if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
dwc2_set_pid_isoc(chan);
/* Packet Count and Xfer Size are not used in Descriptor DMA mode */
hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
TSIZ_SC_MC_PID_MASK;
/* 0 - 1 descriptor, 1 - 2 descriptors, etc */
hctsiz |= (chan->ntd - 1) << TSIZ_NTD_SHIFT & TSIZ_NTD_MASK;
/* Non-zero only for high-speed interrupt endpoints */
hctsiz |= chan->schinfo << TSIZ_SCHINFO_SHIFT & TSIZ_SCHINFO_MASK;
if (dbg_hc(chan)) {
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
dev_vdbg(hsotg->dev, " Start PID: %d\n",
chan->data_pid_start);
dev_vdbg(hsotg->dev, " NTD: %d\n", chan->ntd - 1);
} }
#endif /* VERBOSE_DEBUG */
dwc2_writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
dma_sync_single_for_device(hsotg->dev, chan->desc_list_addr,
chan->desc_list_sz, DMA_TO_DEVICE);
dwc2_writel(chan->desc_list_addr, hsotg->regs + HCDMA(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %pad to HCDMA(%d)\n",
&chan->desc_list_addr, chan->hc_num);
hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
hcchar &= ~HCCHAR_MULTICNT_MASK;
hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT &
HCCHAR_MULTICNT_MASK;
if (hcchar & HCCHAR_CHDIS)
dev_warn(hsotg->dev,
"%s: chdis set, channel %d, hcchar 0x%08x\n",
__func__, chan->hc_num, hcchar);
/* Set host channel enable after all other setup is complete */
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
(hcchar & HCCHAR_MULTICNT_MASK) >>
HCCHAR_MULTICNT_SHIFT);
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
chan->hc_num);
chan->xfer_started = 1;
chan->requests++;
}
/**
* dwc2_hc_continue_transfer() - Continues a data transfer that was started by
* a previous call to dwc2_hc_start_transfer()
*
* @hsotg: Programming view of DWC_otg controller
* @chan: Information needed to initialize the host channel
*
* The caller must ensure there is sufficient space in the request queue and Tx
* Data FIFO. This function should only be called in Slave mode. In DMA mode,
* the controller acts autonomously to complete transfers programmed to a host
* channel.
*
* For an OUT transfer, a new data packet is loaded into the appropriate FIFO
* if there is any data remaining to be queued. For an IN transfer, another
* data packet is always requested. For the SETUP phase of a control transfer,
* this function does nothing.
*
* Return: 1 if a new request is queued, 0 if no more requests are required
* for this transfer
*/
static int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan)
{
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
chan->hc_num);
if (chan->do_split)
/* SPLITs always queue just once per channel */
return 0;
if (chan->data_pid_start == DWC2_HC_PID_SETUP)
/* SETUPs are queued only once since they can't be NAK'd */
return 0;
if (chan->ep_is_in) {
/*
* Always queue another request for other IN transfers. If
* back-to-back INs are issued and NAKs are received for both,
* the driver may still be processing the first NAK when the
* second NAK is received. When the interrupt handler clears
* the NAK interrupt for the first NAK, the second NAK will
* not be seen. So we can't depend on the NAK interrupt
* handler to requeue a NAK'd request. Instead, IN requests
* are issued each time this function is called. When the
* transfer completes, the extra requests for the channel will
* be flushed.
*/
u32 hcchar = dwc2_readl(hsotg->regs + HCCHAR(chan->hc_num));
dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
hcchar |= HCCHAR_CHENA;
hcchar &= ~HCCHAR_CHDIS;
if (dbg_hc(chan))
dev_vdbg(hsotg->dev, " IN xfer: hcchar = 0x%08x\n",
hcchar);
dwc2_writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
chan->requests++;
return 1;
}
/* OUT transfers */
if (chan->xfer_count < chan->xfer_len) {
if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
u32 hcchar = dwc2_readl(hsotg->regs +
HCCHAR(chan->hc_num));
dwc2_hc_set_even_odd_frame(hsotg, chan,
&hcchar);
}
/* Load OUT packet into the appropriate Tx FIFO */
dwc2_hc_write_packet(hsotg, chan);
chan->requests++;
return 1;
}
return 0;
} }
/*
* =========================================================================
* HCD
* =========================================================================
*/
/* /*
* Processes all the URBs in a single list of QHs. Completes them with * Processes all the URBs in a single list of QHs. Completes them with
* -ETIMEDOUT and frees the QTD. * -ETIMEDOUT and frees the QTD.
...@@ -588,6 +2167,224 @@ static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg, ...@@ -588,6 +2167,224 @@ static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg,
return 0; return 0;
} }
/**
* dwc2_core_init() - Initializes the DWC_otg controller registers and
* prepares the core for device mode or host mode operation
*
* @hsotg: Programming view of the DWC_otg controller
* @initial_setup: If true then this is the first init for this instance.
*/
static int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup)
{
u32 usbcfg, otgctl;
int retval;
dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
usbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
/* Set ULPI External VBUS bit if needed */
usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV;
if (hsotg->core_params->phy_ulpi_ext_vbus ==
DWC2_PHY_ULPI_EXTERNAL_VBUS)
usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV;
/* Set external TS Dline pulsing bit if needed */
usbcfg &= ~GUSBCFG_TERMSELDLPULSE;
if (hsotg->core_params->ts_dline > 0)
usbcfg |= GUSBCFG_TERMSELDLPULSE;
dwc2_writel(usbcfg, hsotg->regs + GUSBCFG);
/*
* Reset the Controller
*
* We only need to reset the controller if this is a re-init.
* For the first init we know for sure that earlier code reset us (it
* needed to in order to properly detect various parameters).
*/
if (!initial_setup) {
retval = dwc2_core_reset_and_force_dr_mode(hsotg);
if (retval) {
dev_err(hsotg->dev, "%s(): Reset failed, aborting\n",
__func__);
return retval;
}
}
/*
* This needs to happen in FS mode before any other programming occurs
*/
retval = dwc2_phy_init(hsotg, initial_setup);
if (retval)
return retval;
/* Program the GAHBCFG Register */
retval = dwc2_gahbcfg_init(hsotg);
if (retval)
return retval;
/* Program the GUSBCFG register */
dwc2_gusbcfg_init(hsotg);
/* Program the GOTGCTL register */
otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
otgctl &= ~GOTGCTL_OTGVER;
if (hsotg->core_params->otg_ver > 0)
otgctl |= GOTGCTL_OTGVER;
dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->core_params->otg_ver);
/* Clear the SRP success bit for FS-I2c */
hsotg->srp_success = 0;
/* Enable common interrupts */
dwc2_enable_common_interrupts(hsotg);
/*
* Do device or host initialization based on mode during PCD and
* HCD initialization
*/
if (dwc2_is_host_mode(hsotg)) {
dev_dbg(hsotg->dev, "Host Mode\n");
hsotg->op_state = OTG_STATE_A_HOST;
} else {
dev_dbg(hsotg->dev, "Device Mode\n");
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
}
return 0;
}
/**
* dwc2_core_host_init() - Initializes the DWC_otg controller registers for
* Host mode
*
* @hsotg: Programming view of DWC_otg controller
*
* This function flushes the Tx and Rx FIFOs and flushes any entries in the
* request queues. Host channels are reset to ensure that they are ready for
* performing transfers.
*/
static void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
{
u32 hcfg, hfir, otgctl;
dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
/* Restart the Phy Clock */
dwc2_writel(0, hsotg->regs + PCGCTL);
/* Initialize Host Configuration Register */
dwc2_init_fs_ls_pclk_sel(hsotg);
if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL) {
hcfg = dwc2_readl(hsotg->regs + HCFG);
hcfg |= HCFG_FSLSSUPP;
dwc2_writel(hcfg, hsotg->regs + HCFG);
}
/*
* This bit allows dynamic reloading of the HFIR register during
* runtime. This bit needs to be programmed during initial configuration
* and its value must not be changed during runtime.
*/
if (hsotg->core_params->reload_ctl > 0) {
hfir = dwc2_readl(hsotg->regs + HFIR);
hfir |= HFIR_RLDCTRL;
dwc2_writel(hfir, hsotg->regs + HFIR);
}
if (hsotg->core_params->dma_desc_enable > 0) {
u32 op_mode = hsotg->hw_params.op_mode;
if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a ||
!hsotg->hw_params.dma_desc_enable ||
op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE ||
op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE ||
op_mode == GHWCFG2_OP_MODE_UNDEFINED) {
dev_err(hsotg->dev,
"Hardware does not support descriptor DMA mode -\n");
dev_err(hsotg->dev,
"falling back to buffer DMA mode.\n");
hsotg->core_params->dma_desc_enable = 0;
} else {
hcfg = dwc2_readl(hsotg->regs + HCFG);
hcfg |= HCFG_DESCDMA;
dwc2_writel(hcfg, hsotg->regs + HCFG);
}
}
/* Configure data FIFO sizes */
dwc2_config_fifos(hsotg);
/* TODO - check this */
/* Clear Host Set HNP Enable in the OTG Control Register */
otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
otgctl &= ~GOTGCTL_HSTSETHNPEN;
dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
/* Make sure the FIFOs are flushed */
dwc2_flush_tx_fifo(hsotg, 0x10 /* all TX FIFOs */);
dwc2_flush_rx_fifo(hsotg);
/* Clear Host Set HNP Enable in the OTG Control Register */
otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
otgctl &= ~GOTGCTL_HSTSETHNPEN;
dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
if (hsotg->core_params->dma_desc_enable <= 0) {
int num_channels, i;
u32 hcchar;
/* Flush out any leftover queued requests */
num_channels = hsotg->core_params->host_channels;
for (i = 0; i < num_channels; i++) {
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
hcchar &= ~HCCHAR_CHENA;
hcchar |= HCCHAR_CHDIS;
hcchar &= ~HCCHAR_EPDIR;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(i));
}
/* Halt all channels to put them into a known state */
for (i = 0; i < num_channels; i++) {
int count = 0;
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
hcchar &= ~HCCHAR_EPDIR;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(i));
dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
__func__, i);
do {
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
if (++count > 1000) {
dev_err(hsotg->dev,
"Unable to clear enable on channel %d\n",
i);
break;
}
udelay(1);
} while (hcchar & HCCHAR_CHENA);
}
}
/* Turn on the vbus power */
dev_dbg(hsotg->dev, "Init: Port Power? op_state=%d\n", hsotg->op_state);
if (hsotg->op_state == OTG_STATE_A_HOST) {
u32 hprt0 = dwc2_read_hprt0(hsotg);
dev_dbg(hsotg->dev, "Init: Power Port (%d)\n",
!!(hprt0 & HPRT0_PWR));
if (!(hprt0 & HPRT0_PWR)) {
hprt0 |= HPRT0_PWR;
dwc2_writel(hprt0, hsotg->regs + HPRT0);
}
}
dwc2_enable_host_interrupts(hsotg);
}
/* /*
* Initializes dynamic portions of the DWC_otg HCD state * Initializes dynamic portions of the DWC_otg HCD state
* *
......
drivers/usb/dwc2/hcd.h
浏览文件 @ b02038fa
...@@ -430,6 +430,8 @@ struct hc_xfer_info { ...@@ -430,6 +430,8 @@ struct hc_xfer_info {
}; };
#endif #endif
u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg);
/* Gets the struct usb_hcd that contains a struct dwc2_hsotg */ /* Gets the struct usb_hcd that contains a struct dwc2_hsotg */
static inline struct usb_hcd *dwc2_hsotg_to_hcd(struct dwc2_hsotg *hsotg) static inline struct usb_hcd *dwc2_hsotg_to_hcd(struct dwc2_hsotg *hsotg)
{ {
...@@ -451,6 +453,12 @@ static inline void disable_hc_int(struct dwc2_hsotg *hsotg, int chnum, u32 intr) ...@@ -451,6 +453,12 @@ static inline void disable_hc_int(struct dwc2_hsotg *hsotg, int chnum, u32 intr)
dwc2_writel(mask, hsotg->regs + HCINTMSK(chnum)); dwc2_writel(mask, hsotg->regs + HCINTMSK(chnum));
} }
void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan);
void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
enum dwc2_halt_status halt_status);
void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
struct dwc2_host_chan *chan);
/* /*
* Reads HPRT0 in preparation to modify. It keeps the WC bits 0 so that if they * Reads HPRT0 in preparation to modify. It keeps the WC bits 0 so that if they
* are read as 1, they won't clear when written back. * are read as 1, they won't clear when written back.
......
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