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usb: dwc2: gadget: Use hw params from core 

Use the previously cached hw params in the gadget. This saves a reset
and force mode in the gadget initialization during probe and makes
getting the hardware parameters consistent between gadget and host.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
John Youn 2015-12-17 11:17:45 -08:00 committed by Felipe Balbi
parent 55e1040e42
commit 43e9034904
1 changed files with 16 additions and 25 deletions
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41
drivers/usb/dwc2/gadget.c
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@ -3403,8 +3403,8 @@ static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg)
/* check hardware configuration */
cfg = dwc2_readl(hsotg->regs + GHWCFG2);
hsotg->num_of_eps = (cfg >> GHWCFG2_NUM_DEV_EP_SHIFT) & 0xF;
hsotg->num_of_eps = hsotg->hw_params.num_dev_ep;
/* Add ep0 */
hsotg->num_of_eps++;
@ -3415,7 +3415,7 @@ static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg)
/* Same dwc2_hsotg_ep is used in both directions for ep0 */
hsotg->eps_out[0] = hsotg->eps_in[0];
cfg = dwc2_readl(hsotg->regs + GHWCFG1);
cfg = hsotg->hw_params.dev_ep_dirs;
for (i = 1, cfg >>= 2; i < hsotg->num_of_eps; i++, cfg >>= 2) {
ep_type = cfg & 3;
/* Direction in or both */
@ -3434,11 +3434,8 @@ static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg)
}
}
cfg = dwc2_readl(hsotg->regs + GHWCFG3);
hsotg->fifo_mem = (cfg >> GHWCFG3_DFIFO_DEPTH_SHIFT);
cfg = dwc2_readl(hsotg->regs + GHWCFG4);
hsotg->dedicated_fifos = (cfg >> GHWCFG4_DED_FIFO_SHIFT) & 1;
hsotg->fifo_mem = hsotg->hw_params.total_fifo_size;
hsotg->dedicated_fifos = hsotg->hw_params.en_multiple_tx_fifo;
dev_info(hsotg->dev, "EPs: %d, %s fifos, %d entries in SPRAM\n",
hsotg->num_of_eps,
@ -3563,6 +3560,17 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
memcpy(&hsotg->g_tx_fifo_sz[1], p_tx_fifo, sizeof(p_tx_fifo));
/* Device tree specific probe */
dwc2_hsotg_of_probe(hsotg);
/* Check against largest possible value. */
if (hsotg->g_np_g_tx_fifo_sz >
hsotg->hw_params.dev_nperio_tx_fifo_size) {
dev_warn(dev, "Specified GNPTXFDEP=%d > %d\n",
hsotg->g_np_g_tx_fifo_sz,
hsotg->hw_params.dev_nperio_tx_fifo_size);
hsotg->g_np_g_tx_fifo_sz =
hsotg->hw_params.dev_nperio_tx_fifo_size;
}
/* Dump fifo information */
dev_dbg(dev, "NonPeriodic TXFIFO size: %d\n",
hsotg->g_np_g_tx_fifo_sz);
@ -3579,20 +3587,6 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
/*
* Force Device mode before initialization.
* This allows correctly configuring fifo for device mode.
*/
__bic32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEHOSTMODE);
__orr32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEDEVMODE);
/*
* According to Synopsys databook, this sleep is needed for the force
* device mode to take effect.
*/
msleep(25);
dwc2_hsotg_corereset(hsotg);
ret = dwc2_hsotg_hw_cfg(hsotg);
if (ret) {
dev_err(hsotg->dev, "Hardware configuration failed: %d\n", ret);
@ -3601,9 +3595,6 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
dwc2_hsotg_init(hsotg);
/* Switch back to default configuration */
__bic32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEDEVMODE);
hsotg->ctrl_buff = devm_kzalloc(hsotg->dev,
DWC2_CTRL_BUFF_SIZE, GFP_KERNEL);
if (!hsotg->ctrl_buff) {