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usb: dwc2: Check core parameters 

Check that core parameters have valid values and adjust them if they
aren't.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
John Youn 2017-01-23 14:56:43 -08:00 committed by Felipe Balbi
parent 57b8e23511
commit d936e666ae
1 changed files with 185 additions and 0 deletions
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185
drivers/usb/dwc2/params.c
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@ -377,6 +377,189 @@ static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
}
}
static void dwc2_check_param_otg_cap(struct dwc2_hsotg *hsotg)
{
int valid = 1;
switch (hsotg->params.otg_cap) {
case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
valid = 0;
break;
case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
switch (hsotg->hw_params.op_mode) {
case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
break;
default:
valid = 0;
break;
}
break;
case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
/* always valid */
break;
default:
valid = 0;
break;
}
if (!valid)
dwc2_set_param_otg_cap(hsotg);
}
static void dwc2_check_param_phy_type(struct dwc2_hsotg *hsotg)
{
int valid = 0;
u32 hs_phy_type;
u32 fs_phy_type;
hs_phy_type = hsotg->hw_params.hs_phy_type;
fs_phy_type = hsotg->hw_params.fs_phy_type;
switch (hsotg->params.phy_type) {
case DWC2_PHY_TYPE_PARAM_FS:
if (fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
valid = 1;
break;
case DWC2_PHY_TYPE_PARAM_UTMI:
if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
(hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
valid = 1;
break;
case DWC2_PHY_TYPE_PARAM_ULPI:
if ((hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI) ||
(hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
valid = 1;
break;
default:
break;
}
if (!valid)
dwc2_set_param_phy_type(hsotg);
}
static void dwc2_check_param_speed(struct dwc2_hsotg *hsotg)
{
int valid = 1;
int phy_type = hsotg->params.phy_type;
int speed = hsotg->params.speed;
switch (speed) {
case DWC2_SPEED_PARAM_HIGH:
if ((hsotg->params.speed == DWC2_SPEED_PARAM_HIGH) &&
(phy_type == DWC2_PHY_TYPE_PARAM_FS))
valid = 0;
break;
case DWC2_SPEED_PARAM_FULL:
case DWC2_SPEED_PARAM_LOW:
break;
default:
valid = 0;
break;
}
if (!valid)
dwc2_set_param_speed(hsotg);
}
static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
{
int valid = 0;
int param = hsotg->params.phy_utmi_width;
int width = hsotg->hw_params.utmi_phy_data_width;
switch (width) {
case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
valid = (param == 8);
break;
case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
valid = (param == 16);
break;
case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
valid = (param == 8 || param == 16);
break;
}
if (!valid)
dwc2_set_param_phy_utmi_width(hsotg);
}
#define CHECK_RANGE(_param, _min, _max, _def) do { \
if ((hsotg->params._param) < (_min) || \
(hsotg->params._param) > (_max)) { \
dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
__func__, #_param, hsotg->params._param); \
hsotg->params._param = (_def); \
} \
} while (0)
#define CHECK_BOOL(_param, _check) do { \
if (hsotg->params._param && !(_check)) { \
dev_warn(hsotg->dev, "%s: Invalid parameter %s=%d\n", \
__func__, #_param, hsotg->params._param); \
hsotg->params._param = false; \
} \
} while (0)
static void dwc2_check_params(struct dwc2_hsotg *hsotg)
{
struct dwc2_hw_params *hw = &hsotg->hw_params;
struct dwc2_core_params *p = &hsotg->params;
bool dma_capable = !(hw->arch == GHWCFG2_SLAVE_ONLY_ARCH);
dwc2_check_param_otg_cap(hsotg);
dwc2_check_param_phy_type(hsotg);
dwc2_check_param_speed(hsotg);
dwc2_check_param_phy_utmi_width(hsotg);
CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
CHECK_BOOL(i2c_enable, hw->i2c_enable);
CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a));
CHECK_RANGE(max_packet_count,
15, hw->max_packet_count,
hw->max_packet_count);
CHECK_RANGE(max_transfer_size,
2047, hw->max_transfer_size,
hw->max_transfer_size);
if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
CHECK_BOOL(host_dma, dma_capable);
CHECK_BOOL(dma_desc_enable, p->host_dma);
CHECK_BOOL(dma_desc_fs_enable, p->dma_desc_enable);
CHECK_BOOL(host_ls_low_power_phy_clk,
p->phy_type == DWC2_PHY_TYPE_PARAM_FS);
CHECK_RANGE(host_channels,
1, hw->host_channels,
hw->host_channels);
CHECK_RANGE(host_rx_fifo_size,
16, hw->rx_fifo_size,
hw->rx_fifo_size);
CHECK_RANGE(host_nperio_tx_fifo_size,
16, hw->host_nperio_tx_fifo_size,
hw->host_nperio_tx_fifo_size);
CHECK_RANGE(host_perio_tx_fifo_size,
16, hw->host_perio_tx_fifo_size,
hw->host_perio_tx_fifo_size);
}
if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
CHECK_BOOL(g_dma, dma_capable);
CHECK_BOOL(g_dma_desc, (p->g_dma && hw->dma_desc_enable));
CHECK_RANGE(g_rx_fifo_size,
16, hw->rx_fifo_size,
hw->rx_fifo_size);
CHECK_RANGE(g_np_tx_fifo_size,
16, hw->dev_nperio_tx_fifo_size,
hw->dev_nperio_tx_fifo_size);
}
}
/*
* Gets host hardware parameters. Forces host mode if not currently in
* host mode. Should be called immediately after a core soft reset in
@ -591,5 +774,7 @@ int dwc2_init_params(struct dwc2_hsotg *hsotg)
dwc2_set_default_params(hsotg);
dwc2_get_device_properties(hsotg);
dwc2_check_params(hsotg);
return 0;
}