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 <geoma...@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;
--
1.6.2.5
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