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mips: ath79: Add support for ungating ethernet on ar933x and ar934x

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Add code to ungate the ethernet controller on ar933x and ar934x .

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Wills Wang <wills.wang@live.com>
This commit is contained in:
Marek Vasut 2016-05-06 20:10:39 +02:00 committed by Daniel Schwierzeck
parent 2986a9d4bd
commit 4771bbee5d
3 changed files with 80 additions and 0 deletions
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1
arch/mips/mach-ath79/include/mach/ar71xx_regs.h
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@ -622,6 +622,7 @@
#define AR933X_RESET_GE1_MAC BIT(13)
#define AR933X_RESET_WMAC BIT(11)
#define AR933X_RESET_GE0_MAC BIT(9)
#define AR933X_RESET_ETH_SWITCH BIT(8)
#define AR933X_RESET_USB_HOST BIT(5)
#define AR933X_RESET_USB_PHY BIT(4)
#define AR933X_RESET_USBSUS_OVERRIDE BIT(3)

1
arch/mips/mach-ath79/include/mach/ath79.h
View File

@ -140,6 +140,7 @@ static inline int soc_is_qca956x(void)
return soc_is_tp9343() || soc_is_qca9561();
}
int ath79_eth_reset(void);
int ath79_usb_reset(void);
#endif /* __ASM_MACH_ATH79_H */

78
arch/mips/mach-ath79/reset.c
View File

@ -71,6 +71,84 @@ u32 get_bootstrap(void)
return 0;
}
static int eth_init_ar933x(void)
{
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
void __iomem *gregs = map_physmem(AR933X_GMAC_BASE, AR933X_GMAC_SIZE,
MAP_NOCACHE);
const u32 mask = AR933X_RESET_GE0_MAC | AR933X_RESET_GE0_MDIO |
AR933X_RESET_GE1_MAC | AR933X_RESET_GE1_MDIO |
AR933X_RESET_ETH_SWITCH;
/* Clear MDIO slave EN bit. */
clrbits_be32(rregs + AR933X_RESET_REG_BOOTSTRAP, BIT(17));
mdelay(10);
/* Get Atheros S26 PHY out of reset. */
clrsetbits_be32(pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG,
0x1f, 0x10);
mdelay(10);
setbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
mdelay(10);
clrbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
mdelay(10);
/* Configure AR93xx GMAC register. */
clrsetbits_be32(gregs + AR933X_GMAC_REG_ETH_CFG,
AR933X_ETH_CFG_MII_GE0_MASTER |
AR933X_ETH_CFG_MII_GE0_SLAVE,
AR933X_ETH_CFG_MII_GE0_SLAVE);
return 0;
}
static int eth_init_ar934x(void)
{
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
void __iomem *gregs = map_physmem(AR934X_GMAC_BASE, AR934X_GMAC_SIZE,
MAP_NOCACHE);
const u32 mask = AR934X_RESET_GE0_MAC | AR934X_RESET_GE0_MDIO |
AR934X_RESET_GE1_MAC | AR934X_RESET_GE1_MDIO |
AR934X_RESET_ETH_SWITCH_ANALOG;
u32 reg;
reg = readl(rregs + AR934X_RESET_REG_BOOTSTRAP);
if (reg & AR934X_BOOTSTRAP_REF_CLK_40)
writel(0x570, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
else
writel(0x271, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
writel(BIT(26) | BIT(25), pregs + AR934X_PLL_ETH_XMII_CONTROL_REG);
setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
/* Configure AR934x GMAC register. */
writel(AR934X_ETH_CFG_RGMII_GMAC0, gregs + AR934X_GMAC_REG_ETH_CFG);
return 0;
}
int ath79_eth_reset(void)
{
/*
* Un-reset ethernet. DM still doesn't have any notion of reset
* framework, so we do it by hand here.
*/
if (soc_is_ar933x())
return eth_init_ar933x();
if (soc_is_ar934x())
return eth_init_ar934x();
return -EINVAL;
}
static int usb_reset_ar933x(void __iomem *reset_regs)
{
/* Ungate the USB block */