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MIPS: lantiq: improve USB initialization

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This adds code to initialize the USB controller and PHY also on Danube,
Amazon SE and AR10. This code is based on the Vendor driver from
different UGW versions and compared to the hardware documentation.

This patch is included in OpenWrt for many years.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Hauke Mehrtens 2024-07-09 00:23:04 +02:00 committed by Thomas Bogendoerfer
parent 680e7863de
commit 9c7a86c935
1 changed files with 20 additions and 0 deletions
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20
arch/mips/lantiq/xway/sysctrl.c
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@ -247,6 +247,25 @@ static void pmu_disable(struct clk *clk)
pr_warn("deactivating PMU module failed!");
}
static void usb_set_clock(void)
{
unsigned int val = ltq_cgu_r32(ifccr);
if (of_machine_is_compatible("lantiq,ar10") ||
of_machine_is_compatible("lantiq,grx390")) {
val &= ~0x03; /* XTAL divided by 3 */
} else if (of_machine_is_compatible("lantiq,ar9") ||
of_machine_is_compatible("lantiq,vr9")) {
/* TODO: this depends on the XTAL frequency */
val |= 0x03; /* XTAL divided by 3 */
} else if (of_machine_is_compatible("lantiq,ase")) {
val |= 0x20; /* from XTAL */
} else if (of_machine_is_compatible("lantiq,danube")) {
val |= 0x30; /* 12 MHz, generated from 36 MHz */
}
ltq_cgu_w32(val, ifccr);
}
/* the pci enable helper */
static int pci_enable(struct clk *clk)
{
@ -588,4 +607,5 @@ void __init ltq_soc_init(void)
clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
clkdev_add_pmu("1e100400.serial", NULL, 1, 0, PMU_ASC0);
}
usb_set_clock();
}