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#define GPIO_PRUPOSE 0x60
#define GPIO_MDIO_BIT (1<<7)
#define RT305X_ESW_PHY_WRITE (1 << 13)
#define RT305X_ESW_PHY_TOUT (5 * HZ)
#define RT305X_ESW_PHY_CONTROL_0 0xC0
#define RT305X_ESW_PHY_CONTROL_1 0xC4
static void __iomem *ramips_esw_base = 0;
static inline void
ramips_esw_wr(u32 val, unsigned reg)
{
__raw_writel(val, ramips_esw_base + reg);
}
static inline u32
ramips_esw_rr(unsigned reg)
{
return __raw_readl(ramips_esw_base + reg);
}
static void
ramips_enable_mdio(int s)
{
u32 gpio = rt305x_sysc_rr(GPIO_PRUPOSE);
if(s)
gpio &= ~GPIO_MDIO_BIT;
else
gpio |= GPIO_MDIO_BIT;
rt305x_sysc_wr(gpio, GPIO_PRUPOSE);
}
u32
mii_mgr_write(u32 phy_addr, u32 phy_register, u32 write_data)
{
unsigned long volatile t_start = jiffies;
int ret = 0;
ramips_enable_mdio(1);
while(1)
{
if(!(ramips_esw_rr(RT305X_ESW_PHY_CONTROL_1) & (0x1 << 0)))
break;
if(time_after(jiffies, t_start + RT305X_ESW_PHY_TOUT))
{
ret = 1;
goto out;
}
}
ramips_esw_wr(((write_data & 0xFFFF) << 16) | (phy_register << 8) |
(phy_addr) | RT305X_ESW_PHY_WRITE, RT305X_ESW_PHY_CONTROL_0);
t_start = jiffies;
while(1)
{
if(ramips_esw_rr(RT305X_ESW_PHY_CONTROL_1) & (0x1 << 0))
break;
if(time_after(jiffies, t_start + RT305X_ESW_PHY_TOUT))
{
ret = 1;
break;
}
}
out:
ramips_enable_mdio(0);
if(ret)
printk(KERN_ERR "ramips_eth: MDIO timeout\n");
return ret;
}
static int
rt305x_esw_init(void)
{
int i;
ramips_esw_base = ioremap_nocache(RT305X_SWITCH_BASE, PAGE_SIZE);
if(!ramips_esw_base)
return -ENOMEM;
/* vodoo from original driver */
ramips_esw_wr(0xC8A07850, 0x08);
ramips_esw_wr(0x00000000, 0xe4);
ramips_esw_wr(0x00405555, 0x14);
ramips_esw_wr(0x00002001, 0x50);
ramips_esw_wr(0x00007f7f, 0x90);
ramips_esw_wr(0x00007f3f, 0x98);
ramips_esw_wr(0x00d6500c, 0xcc);
ramips_esw_wr(0x0008a301, 0x9c);
ramips_esw_wr(0x02404040, 0x8c);
ramips_esw_wr(0x00001002, 0x48);
ramips_esw_wr(0x3f502b28, 0xc8);
ramips_esw_wr(0x00000000, 0x84);
mii_mgr_write(0, 31, 0x8000);
for(i = 0; i < 5; i++)
{
mii_mgr_write(i, 0, 0x3100); //TX10 waveform coefficient
mii_mgr_write(i, 26, 0x1601); //TX10 waveform coefficient
mii_mgr_write(i, 29, 0x7058); //TX100/TX10 AD/DA current bias
mii_mgr_write(i, 30, 0x0018); //TX100 slew rate control
}
/* PHY IOT */
mii_mgr_write(0, 31, 0x0); //select global register
mii_mgr_write(0, 22, 0x052f); //tune TP_IDL tail and head waveform
mii_mgr_write(0, 17, 0x0fe0); //set TX10 signal amplitude threshold to minimum
mii_mgr_write(0, 18, 0x40ba); //set squelch amplitude to higher threshold
mii_mgr_write(0, 14, 0x65); //longer TP_IDL tail length
mii_mgr_write(0, 31, 0x8000); //select local register
/* Port 5 Disabled */
rt305x_sysc_wr(rt305x_sysc_rr(0x60) | (1 << 9), 0x60); //set RGMII to GPIO mode (GPIO41-GPIO50)
rt305x_sysc_wr(0xfff, 0x674); //GPIO41-GPIO50 output mode
rt305x_sysc_wr(0x0, 0x670); //GPIO41-GPIO50 output low
/* set default vlan */
ramips_esw_wr(0x2001, 0x50);
ramips_esw_wr(0x504f, 0x70);
return 0;
}
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