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USB OHCI support for at91sam9g45 SoC

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Add USB OHCI support for at91sam9g45ekes/at91sam9m10g45ek boards.

Note that according to errata from Atmel, OHCI is not operational
on the first revision of at91sam9g45 chip. So this patch enables
OHCI support for later revisions.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
This commit is contained in:
Sergey Matyukevich 2010-06-09 23:09:06 +04:00 • committed by Remy Bohmer
parent 39ddd10b04
commit 64203c7b0f
3 changed files with 39 additions and 2 deletions
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14
arch/arm/include/asm/arch-at91/at91_pmc.h
View file

@ -35,13 +35,15 @@ typedef struct at91_pmc {
u32 pcer; /* 0x10 Peripheral Clock Enable Register */
u32 pcdr; /* 0x14 Peripheral Clock Disable Register */
u32 pcsr; /* 0x18 Peripheral Clock Status Register */
u32 reserved1;
u32 uckr; /* 0x1C UTMI Clock Register */
u32 mor; /* 0x20 Main Oscilator Register */
u32 mcfr; /* 0x24 Main Clock Frequency Register */
u32 pllar; /* 0x28 PLL A Register */
u32 pllbr; /* 0x2C PLL B Register */
u32 mckr; /* 0x30 Master Clock Register */
u32 reserved2[3];
u32 reserved1;
u32 usb; /* 0x38 USB Clock Register */
u32 reserved2;
u32 pck[4]; /* 0x40 Programmable Clock Register 0 - 3 */
u32 reserved3[4];
u32 ier; /* 0x60 Interrupt Enable Register */
@ -198,6 +200,14 @@ typedef struct at91_pmc {
#define AT91_PMC_PDIV_1 (0 << 12)
#define AT91_PMC_PDIV_2 (1 << 12)
#ifdef CONFIG_AT91_LEGACY
#define AT91_PMC_USB (AT91_PMC + 0x38) /* USB Clock Register */
#endif
#define AT91_PMC_USBS_USB_PLLA (0x0) /* USB Clock Input is PLLA */
#define AT91_PMC_USBS_USB_UPLL (0x1) /* USB Clock Input is UPLL */
#define AT91_PMC_USBDIV_8 (0x7 << 8) /* USB Clock divided by 8 */
#define AT91_PMC_USBDIV_10 (0x9 << 8) /* USB Clock divided by 10 */
#ifdef CONFIG_AT91_LEGACY
#define AT91_PMC_PCKR(n) (AT91_PMC + 0x40 + ((n) * 4)) /* Programmable Clock 0-3 Registers */

13
board/atmel/at91sam9m10g45ek/at91sam9m10g45ek.c
View file

@ -87,6 +87,16 @@ static void at91sam9m10g45ek_nand_hw_init(void)
}
#endif
#ifdef CONFIG_CMD_USB
static void at91sam9m10g45ek_usb_hw_init(void)
{
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9G45_ID_PIODE);
at91_set_gpio_output(AT91_PIN_PD1, 0);
at91_set_gpio_output(AT91_PIN_PD3, 0);
}
#endif
#ifdef CONFIG_MACB
static void at91sam9m10g45ek_macb_hw_init(void)
{
@ -251,6 +261,9 @@ int board_init(void)
#ifdef CONFIG_CMD_NAND
at91sam9m10g45ek_nand_hw_init();
#endif
#ifdef CONFIG_CMD_USB
at91sam9m10g45ek_usb_hw_init();
#endif
#ifdef CONFIG_HAS_DATAFLASH
at91_spi0_hw_init(1 << 0);
#endif

14
drivers/usb/host/ohci-at91.c
View file

@ -41,6 +41,15 @@ int usb_cpu_init(void)
writel(get_pllb_init(), &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
;
#elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45)
/* Enable UPLL */
writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN,
&pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU)
;
/* Select PLLA as input clock of OHCI */
writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb);
#endif
/* Enable USB host clock. */
@ -72,6 +81,11 @@ int usb_cpu_stop(void)
writel(0, &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
;
#elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45)
/* Disable UPLL */
writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU)
;
#endif
return 0;