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drivers: usb: atmel: clean up the UTMI PLL code

Browse source 
Due to introducing the new UTMI PLL clock handle functions,
use these function to reduce the duplicated code.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Tested-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Wenyou Yang 2016-02-02 11:11:53 +08:00 committed by Andreas Bießmann
parent db5c102be2
commit b55b596086
2 changed files with 11 additions and 47 deletions
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34
drivers/usb/host/ehci-atmel.c
View file

@ -7,37 +7,18 @@
*/
#include <common.h>
#include <watchdog.h>
#include <usb.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/clk.h>
#include "ehci.h"
/* Enable UTMI PLL time out 500us
* 10 times as datasheet specified
*/
#define EN_UPLL_TIMEOUT 500UL
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
start_time = get_timer(0);
/* Enable UTMI PLL */
writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
WATCHDOG_RESET();
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
printf("ERROR: failed to enable UPLL\n");
if (at91_upll_clk_enable())
return -1;
}
}
/* Enable USB Host clock */
at91_periph_clk_enable(ATMEL_ID_UHPHS);
@ -51,23 +32,12 @@ int ehci_hcd_init(int index, enum usb_init_type init,
int ehci_hcd_stop(int index)
{
at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
/* Disable USB Host Clock */
at91_periph_clk_disable(ATMEL_ID_UHPHS);
start_time = get_timer(0);
/* Disable UTMI PLL */
writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
WATCHDOG_RESET();
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
printf("ERROR: failed to stop UPLL\n");
if (at91_upll_clk_disable())
return -1;
}
}
return 0;
}

20
drivers/usb/host/ohci-at91.c
View file

@ -24,17 +24,13 @@ int usb_cpu_init(void)
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
;
#ifdef CONFIG_AT91SAM9N12
writel(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2, &pmc->usb);
at91_usb_clk_init(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2);
#endif
#elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
/* Enable UPLL */
writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN,
&pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU)
;
if (at91_upll_clk_enable())
return -1;
/* Select PLLA as input clock of OHCI */
writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb);
at91_usb_clk_init(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10);
#endif
at91_periph_clk_enable(ATMEL_ID_UHP);
@ -60,17 +56,15 @@ int usb_cpu_stop(void)
#ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB
#ifdef CONFIG_AT91SAM9N12
writel(0, &pmc->usb);
at91_usb_clk_init(0);
#endif
/* Disable PLLB */
writel(0, &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
;
#elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
/* Disable UPLL */
writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU)
;
if (at91_upll_clk_disable())
return -1;
#endif
return 0;