3 * Atmel Semiconductor <www.atmel.com>
4 * Written-by: Bo Shen <voice.shen@atmel.com>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
29 #include <asm/arch/hardware.h>
30 #include <asm/arch/at91_pmc.h>
31 #include <asm/arch/clk.h>
35 /* Enable UTMI PLL time out 500us
36 * 10 times as datasheet specified
38 #define EN_UPLL_TIMEOUT 500UL
40 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
42 at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
43 ulong start_time, tmp_time;
45 start_time = get_timer(0);
47 writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
48 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
50 tmp_time = get_timer(0);
51 if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
52 printf("ERROR: failed to enable UPLL\n");
57 /* Enable USB Host clock */
58 writel(1 << ATMEL_ID_UHPHS, &pmc->pcer);
60 *hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI;
61 *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
62 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
67 int ehci_hcd_stop(int index)
69 at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
70 ulong start_time, tmp_time;
72 /* Disable USB Host Clock */
73 writel(1 << ATMEL_ID_UHPHS, &pmc->pcdr);
75 start_time = get_timer(0);
76 /* Disable UTMI PLL */
77 writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
78 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
80 tmp_time = get_timer(0);
81 if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
82 printf("ERROR: failed to stop UPLL\n");