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123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
#include <rt305x.h>
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#include <rt305x_regs.h>
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#define GPIO_PRUPOSE 0x60
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#define GPIO_MDIO_BIT (1<<7)
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#define RT305X_ESW_PHY_WRITE (1 << 13)
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#define RT305X_ESW_PHY_TOUT (5 * HZ)
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#define RT305X_ESW_PHY_CONTROL_0 0xC0
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#define RT305X_ESW_PHY_CONTROL_1 0xC4
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static void __iomem *ramips_esw_base = 0;
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static inline void
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ramips_esw_wr(u32 val, unsigned reg)
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{
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__raw_writel(val, ramips_esw_base + reg);
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}
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static inline u32
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ramips_esw_rr(unsigned reg)
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{
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return __raw_readl(ramips_esw_base + reg);
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}
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static void
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ramips_enable_mdio(int s)
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{
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u32 gpio = rt305x_sysc_rr(GPIO_PRUPOSE);
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if(s)
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gpio &= ~GPIO_MDIO_BIT;
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else
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gpio |= GPIO_MDIO_BIT;
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rt305x_sysc_wr(gpio, GPIO_PRUPOSE);
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}
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u32
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mii_mgr_write(u32 phy_addr, u32 phy_register, u32 write_data)
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{
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unsigned long volatile t_start = jiffies;
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int ret = 0;
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ramips_enable_mdio(1);
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while(1)
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{
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if(!(ramips_esw_rr(RT305X_ESW_PHY_CONTROL_1) & (0x1 << 0)))
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break;
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if(time_after(jiffies, t_start + RT305X_ESW_PHY_TOUT))
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{
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ret = 1;
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goto out;
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}
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}
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ramips_esw_wr(((write_data & 0xFFFF) << 16) | (phy_register << 8) |
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(phy_addr) | RT305X_ESW_PHY_WRITE, RT305X_ESW_PHY_CONTROL_0);
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t_start = jiffies;
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while(1)
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{
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if(ramips_esw_rr(RT305X_ESW_PHY_CONTROL_1) & (0x1 << 0))
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break;
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if(time_after(jiffies, t_start + RT305X_ESW_PHY_TOUT))
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{
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ret = 1;
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break;
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}
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}
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out:
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ramips_enable_mdio(0);
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if(ret)
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printk(KERN_ERR "ramips_eth: MDIO timeout\n");
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return ret;
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}
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static int
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rt305x_esw_init(void)
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{
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int i;
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ramips_esw_base = ioremap_nocache(RT305X_SWITCH_BASE, PAGE_SIZE);
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if(!ramips_esw_base)
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return -ENOMEM;
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/* vodoo from original driver */
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ramips_esw_wr(0xC8A07850, 0x08);
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ramips_esw_wr(0x00000000, 0xe4);
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ramips_esw_wr(0x00405555, 0x14);
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ramips_esw_wr(0x00002001, 0x50);
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ramips_esw_wr(0x00007f7f, 0x90);
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ramips_esw_wr(0x00007f3f, 0x98);
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ramips_esw_wr(0x00d6500c, 0xcc);
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ramips_esw_wr(0x0008a301, 0x9c);
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ramips_esw_wr(0x02404040, 0x8c);
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ramips_esw_wr(0x00001002, 0x48);
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ramips_esw_wr(0x3f502b28, 0xc8);
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ramips_esw_wr(0x00000000, 0x84);
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mii_mgr_write(0, 31, 0x8000);
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for(i = 0; i < 5; i++)
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{
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mii_mgr_write(i, 0, 0x3100); //TX10 waveform coefficient
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mii_mgr_write(i, 26, 0x1601); //TX10 waveform coefficient
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mii_mgr_write(i, 29, 0x7058); //TX100/TX10 AD/DA current bias
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mii_mgr_write(i, 30, 0x0018); //TX100 slew rate control
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}
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/* PHY IOT */
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mii_mgr_write(0, 31, 0x0); //select global register
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mii_mgr_write(0, 22, 0x052f); //tune TP_IDL tail and head waveform
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mii_mgr_write(0, 17, 0x0fe0); //set TX10 signal amplitude threshold to minimum
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mii_mgr_write(0, 18, 0x40ba); //set squelch amplitude to higher threshold
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mii_mgr_write(0, 14, 0x65); //longer TP_IDL tail length
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mii_mgr_write(0, 31, 0x8000); //select local register
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/* Port 5 Disabled */
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rt305x_sysc_wr(rt305x_sysc_rr(0x60) | (1 << 9), 0x60); //set RGMII to GPIO mode (GPIO41-GPIO50)
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rt305x_sysc_wr(0xfff, 0x674); //GPIO41-GPIO50 output mode
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rt305x_sysc_wr(0x0, 0x670); //GPIO41-GPIO50 output low
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/* set default vlan */
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ramips_esw_wr(0x2001, 0x50);
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ramips_esw_wr(0x504f, 0x70);
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return 0;
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}
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