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Code Issues Releases Activity

bdk: xusb: improve clock deinit

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Allows L4T to use XUSB on T210B01 after a UMS usage.
T210 somehow was fine.
This commit is contained in:
CTCaer 2022-10-11 04:07:24 +03:00
parent 197ce4c76f
commit d08fac5a08
2 changed files with 23 additions and 14 deletions
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33
bdk/usb/xusbd.c
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@ -770,9 +770,6 @@ static void _xusbd_ep1_disable(u32 ep_idx)
// Set EP state to disabled.
ep_ctxt->ep_state = EP_DISABLED;
// Clear EP context.
memset((void *)ep_ctxt, 0, sizeof(xusb_ep_ctx_t));
// Wait for EP status to change.
_xusb_xhci_mask_wait(XUSB_DEV_XHCI_EP_STCHG, ep_mask, ep_mask, 1000);
@ -973,27 +970,39 @@ int xusb_device_init()
//! TODO: Power down more stuff.
static void _xusb_device_power_down()
{
// Disable clock for XUSB Super-Speed and set source to CLK_M.
CLOCK(CLK_RST_CONTROLLER_RST_DEV_W_SET) = BIT(CLK_W_XUSB_SS);
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_XUSB_SS) &= 0x1FFFFF00;
usleep(2);
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = BIT(CLK_W_XUSB_SS);
// Put XUSB device into reset.
CLOCK(CLK_RST_CONTROLLER_RST_DEV_U_SET) = BIT(CLK_U_XUSB_DEV);
usleep(2);
// Reset Full-Speed clock source to CLK_M and div1.
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_XUSB_FS) = 0;
usleep(2);
// Disable XUSB device clock.
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_U_CLR) = BIT(CLK_U_XUSB_DEV);
// Force UTMIP_PLL power down.
CLOCK(CLK_RST_CONTROLLER_UTMIP_PLL_CFG1) &= (~BIT(15));
CLOCK(CLK_RST_CONTROLLER_UTMIP_PLL_CFG2) |= BIT(4) | BIT(0); // UTMIP_FORCE_PD_SAMP_A/C_POWERDOWN.
// Force enable UTMIPLL IDDQ.
CLOCK(CLK_RST_CONTROLLER_UTMIPLL_HW_PWRDN_CFG0) |= 3;
// Disable clocks for XUSB device and Super-Speed logic.
CLOCK(CLK_RST_CONTROLLER_RST_DEV_U_SET) = BIT(CLK_U_XUSB_DEV);
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_U_CLR) = BIT(CLK_U_XUSB_DEV);
CLOCK(CLK_RST_CONTROLLER_RST_DEV_W_SET) = BIT(CLK_W_XUSB_SS);
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = BIT(CLK_W_XUSB_SS);
// Disable PLLU.
clock_disable_pllu();
// Set XUSB_PADCTL clock reset.
CLOCK(CLK_RST_CONTROLLER_RST_DEV_W_SET) = BIT(CLK_W_XUSB_PADCTL);
// Disable XUSB clock.
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = BIT(CLK_W_XUSB);
CLOCK(CLK_RST_CONTROLLER_RST_DEV_W_SET) = BIT(CLK_W_XUSB);
// Disable PLLU.
clock_disable_pllu();
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_W_CLR) = BIT(CLK_W_XUSB);
}
static int _xusb_queue_trb(u32 ep_idx, void *trb, bool ring_doorbell)