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 --- arch/arm/include/asm/arch-at91/at91_pmc.h | 14 ++++++++++++-- board/atmel/at91sam9m10g45ek/at91sam9m10g45ek.c | 13 +++++++++++++ drivers/usb/host/ohci-at91.c | 13 +++++++++++++ 3 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/arch/arm/include/asm/arch-at91/at91_pmc.h b/arch/arm/include/asm/arch-at91/at91_pmc.h index 5b1a85d..2f9ad96 100644 --- a/arch/arm/include/asm/arch-at91/at91_pmc.h +++ b/arch/arm/include/asm/arch-at91/at91_pmc.h @@ -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 */ @@ -199,6 +201,14 @@ typedef struct at91_pmc { #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 */
#define AT91_PMC_IER (AT91_PMC + 0x60) /* Interrupt Enable Register */ diff --git a/board/atmel/at91sam9m10g45ek/at91sam9m10g45ek.c b/board/atmel/at91sam9m10g45ek/at91sam9m10g45ek.c index edfb627..8fa0449 100644 --- a/board/atmel/at91sam9m10g45ek/at91sam9m10g45ek.c +++ b/board/atmel/at91sam9m10g45ek/at91sam9m10g45ek.c @@ -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 diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index b2e03bc..f791df7 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -41,6 +41,14 @@ 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 +80,11 @@ 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;