3 * Atmel Semiconductor <www.atmel.com>
4 * Written-by: Bo Shen <voice.shen@atmel.com>
6 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/hardware.h>
14 #include <asm/arch/at91_pmc.h>
15 #include <asm/arch/clk.h>
19 /* Enable UTMI PLL time out 500us
20 * 10 times as datasheet specified
22 #define EN_UPLL_TIMEOUT 500UL
24 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
26 at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
27 ulong start_time, tmp_time;
29 start_time = get_timer(0);
31 writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
32 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
34 tmp_time = get_timer(0);
35 if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
36 printf("ERROR: failed to enable UPLL\n");
41 /* Enable USB Host clock */
42 writel(1 << ATMEL_ID_UHPHS, &pmc->pcer);
44 *hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI;
45 *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
46 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
51 int ehci_hcd_stop(int index)
53 at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
54 ulong start_time, tmp_time;
56 /* Disable USB Host Clock */
57 writel(1 << ATMEL_ID_UHPHS, &pmc->pcdr);
59 start_time = get_timer(0);
60 /* Disable UTMI PLL */
61 writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
62 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
64 tmp_time = get_timer(0);
65 if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
66 printf("ERROR: failed to stop UPLL\n");