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imx8/usbxhci: bring usb out of reset

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do all the magic dwc3 specific initalization as well
as reset the hub and power on the phys.

with this, "usb start" command is not needed anymore
from u-boot.
This commit is contained in:
cinap_lenrek 2022-06-12 14:31:55 +00:00
parent 1d81f7eacb
commit f1f5045b2e
1 changed files with 104 additions and 0 deletions
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104
sys/src/9/imx8/usbxhciimx.c
View file

@ -1785,6 +1785,92 @@ clkenable(int i, int on)
setclkgate(clk, on);
}
static void
hubreset(int on)
{
/* gpio registers */
enum {
GPIO_DR = 0x00/4,
GPIO_GDIR = 0x04/4,
GPIO_PSR = 0x08/4,
GPIO_ICR1 = 0x0C/4,
GPIO_ICR2 = 0x10/4,
GPIO_IMR = 0x14/4,
GPIO_ISR = 0x18/4,
GPIO_EDGE_SEL = 0x1C/4,
};
static u32int *gpio1 = (u32int*)(VIRTIO + 0x200000);
gpio1[GPIO_GDIR] |= 1<<14; /* output */
if(on)
gpio1[GPIO_DR] |= 1<<14;
else
gpio1[GPIO_DR] &= ~(1<<14);
}
static void
powerup(int i)
{
/* power gating controller registers */
enum {
GPC_PGC_CPU_0_1_MAPPING = 0xEC/4,
GPC_PGC_PU_PGC_SW_PUP_REQ = 0xF8/4,
USB_OTG1_SW_PUP_REQ = 1<<2,
};
static u32int *gpc = (u32int*)(VIRTIO + 0x3A0000);
gpc[GPC_PGC_CPU_0_1_MAPPING] = 0x0000FFFF;
gpc[GPC_PGC_PU_PGC_SW_PUP_REQ] |= (USB_OTG1_SW_PUP_REQ<<i);
while(gpc[GPC_PGC_PU_PGC_SW_PUP_REQ] & (USB_OTG1_SW_PUP_REQ<<i))
;
gpc[GPC_PGC_CPU_0_1_MAPPING] = 0;
}
static void
phyinit(u32int *reg)
{
enum {
PHY_CTRL0 = 0x0/4,
CTRL0_REF_SSP_EN = 1<<2,
PHY_CTRL1 = 0x4/4,
CTRL1_RESET = 1<<0,
CTRL1_ATERESET = 1<<3,
CTRL1_VDATSRCENB0 = 1<<19,
CTRL1_VDATDETEBB0 = 1<<20,
PHY_CTRL2 = 0x8/4,
CTRL2_TXENABLEN0 = 1<<8,
};
reg[PHY_CTRL1] = (reg[PHY_CTRL1] & ~(CTRL1_VDATSRCENB0 | CTRL1_VDATDETEBB0)) | CTRL1_RESET | CTRL1_ATERESET;
reg[PHY_CTRL0] |= CTRL0_REF_SSP_EN;
reg[PHY_CTRL2] |= CTRL2_TXENABLEN0;
reg[PHY_CTRL1] &= ~(CTRL1_RESET | CTRL1_ATERESET);
}
static void
coreinit(u32int *reg)
{
enum {
GCTL = 0xC110/4,
PWRDNSCALE_SHIFT = 19,
PWRDNSCALE_MASK = 0x3FFF << PWRDNSCALE_SHIFT,
PRTCAPDIR_SHIFT = 12,
PRTCAPDIR_MASK = 3 << PRTCAPDIR_SHIFT,
DISSCRAMBLE = 1<<3,
DSBLCLKGTNG = 1<<0,
GFLADJ = 0xC630/4,
GFLADJ_30MHZ_SDBND_SEL = 1<<7,
GFLADJ_30MHZ_SHIFT = 0,
GFLADJ_30MHZ_MASK = 0x3F << GFLADJ_30MHZ_SHIFT,
};
reg[GCTL] &= ~(PWRDNSCALE_MASK | DISSCRAMBLE | DSBLCLKGTNG | PRTCAPDIR_MASK);
reg[GCTL] |= 2<<PWRDNSCALE_SHIFT | 1<<PRTCAPDIR_SHIFT;
reg[GFLADJ] = (reg[GFLADJ] & ~GFLADJ_30MHZ_MASK) | 0x20<<GFLADJ_30MHZ_SHIFT | GFLADJ_30MHZ_SDBND_SEL;
}
static int
reset(Hci *hp)
{
@ -1808,13 +1894,31 @@ reset(Hci *hp)
Found:
if(i == 0){
static u32int *iomuxc = (u32int*)(VIRTIO + 0x330000);
enum {
IOMUXC_CTL_PAD_GPIO1_IO13 = 0x5C/4, /* for gpio1 13 */
IOMUXC_CTL_PAD_GPIO1_IO14 = 0x60/4, /* for gpio1 14 */
IOMUXC_SW_PAD_CTRL_PAD_GPIO1_IO14 = 0x2C8/4,
};
iomuxc[IOMUXC_CTL_PAD_GPIO1_IO13] = 1;
iomuxc[IOMUXC_CTL_PAD_GPIO1_IO14] = 0;
iomuxc[IOMUXC_SW_PAD_CTRL_PAD_GPIO1_IO14] = 0x16;
hubreset(0);
microdelay(500);
hubreset(1);
for(i = 0; i < nelem(ctlrs); i++) clkenable(i, 0);
setclkrate("ccm_usb_bus_clk_root", "system_pll2_div2", 500*Mhz);
setclkrate("ccm_usb_core_ref_clk_root", "system_pll1_div8", 100*Mhz);
setclkrate("ccm_usb_phy_ref_clk_root", "system_pll1_div8", 100*Mhz);
i = 0;
}
powerup(i);
clkenable(i, 1);
phyinit(&ctlr->mmio[0xF0040/4]);
coreinit(ctlr->mmio);
hp->init = init;
hp->dump = dump;