target/linux/ramips/files/drivers/net/ramips_esw.c

   1 #include <linux/ioport.h>
   2
   3 #include <rt305x_regs.h>
   4 #include <rt305x_esw_platform.h>
   5
   6 #define RT305X_ESW_REG_FCT0             0x08
   7 #define RT305X_ESW_REG_PFC1             0x14
   8 #define RT305X_ESW_REG_PVIDC(_n)        (0x48 + 4 * (_n))
   9 #define RT305X_ESW_REG_VLANI(_n)        (0x50 + 4 * (_n))
  10 #define RT305X_ESW_REG_VMSC(_n)         (0x70 + 4 * (_n))
  11 #define RT305X_ESW_REG_FPA              0x84
  12 #define RT305X_ESW_REG_SOCPC            0x8c
  13 #define RT305X_ESW_REG_POC1             0x90
  14 #define RT305X_ESW_REG_POC2             0x94
  15 #define RT305X_ESW_REG_POC3             0x98
  16 #define RT305X_ESW_REG_SGC              0x9c
  17 #define RT305X_ESW_REG_PCR0             0xc0
  18 #define RT305X_ESW_REG_PCR1             0xc4
  19 #define RT305X_ESW_REG_FPA2             0xc8
  20 #define RT305X_ESW_REG_FCT2             0xcc
  21 #define RT305X_ESW_REG_SGC2             0xe4
  22
  23 #define RT305X_ESW_PCR0_WT_NWAY_DATA_S  16
  24 #define RT305X_ESW_PCR0_WT_PHY_CMD      BIT(13)
  25 #define RT305X_ESW_PCR0_CPU_PHY_REG_S   8
  26
  27 #define RT305X_ESW_PCR1_WT_DONE         BIT(0)
  28
  29 #define RT305X_ESW_PHY_TIMEOUT          (5 * HZ)
  30
  31 struct rt305x_esw {
  32         void __iomem *base;
  33         struct rt305x_esw_platform_data *pdata;
  34         spinlock_t reg_rw_lock;
  35 };
  36
  37 static inline void
  38 rt305x_esw_wr(struct rt305x_esw *esw, u32 val, unsigned reg)
  39 {
  40         __raw_writel(val, esw->base + reg);
  41 }
  42
  43 static inline u32
  44 rt305x_esw_rr(struct rt305x_esw *esw, unsigned reg)
  45 {
  46         return __raw_readl(esw->base + reg);
  47 }
  48
  49 static inline void
  50 rt305x_esw_rmw_raw(struct rt305x_esw *esw, unsigned reg, unsigned long mask,
  51                    unsigned long val)
  52 {
  53         unsigned long t;
  54
  55         t = __raw_readl(esw->base + reg) & ~mask;
  56         __raw_writel(t | val, esw->base + reg);
  57 }
  58
  59 static void
  60 rt305x_esw_rmw(struct rt305x_esw *esw, unsigned reg, unsigned long mask,
  61                unsigned long val)
  62 {
  63         unsigned long flags;
  64
  65         spin_lock_irqsave(&esw->reg_rw_lock, flags);
  66         rt305x_esw_rmw_raw(esw, reg, mask, val);
  67         spin_unlock_irqrestore(&esw->reg_rw_lock, flags);
  68 }
  69
  70 static u32
  71 rt305x_mii_write(struct rt305x_esw *esw, u32 phy_addr, u32 phy_register,
  72                  u32 write_data)
  73 {
  74         unsigned long t_start = jiffies;
  75         int ret = 0;
  76
  77         while (1) {
  78                 if (!(rt305x_esw_rr(esw, RT305X_ESW_REG_PCR1) &
  79                       RT305X_ESW_PCR1_WT_DONE))
  80                         break;
  81                 if (time_after(jiffies, t_start + RT305X_ESW_PHY_TIMEOUT)) {
  82                         ret = 1;
  83                         goto out;
  84                 }
  85         }
  86
  87         write_data &= 0xffff;
  88         rt305x_esw_wr(esw,
  89                       (write_data << RT305X_ESW_PCR0_WT_NWAY_DATA_S) |
  90                       (phy_register << RT305X_ESW_PCR0_CPU_PHY_REG_S) |
  91                       (phy_addr) | RT305X_ESW_PCR0_WT_PHY_CMD,
  92                       RT305X_ESW_REG_PCR0);
  93
  94         t_start = jiffies;
  95         while (1) {
  96                 if (rt305x_esw_rr(esw, RT305X_ESW_REG_PCR1) &
  97                     RT305X_ESW_PCR1_WT_DONE)
  98                         break;
  99
 100                 if (time_after(jiffies, t_start + RT305X_ESW_PHY_TIMEOUT)) {
 101                         ret = 1;
 102                         break;
 103                 }
 104         }
 105 out:
 106         if (ret)
 107                 printk(KERN_ERR "ramips_eth: MDIO timeout\n");
 108         return ret;
 109 }
 110
 111 static void
 112 rt305x_esw_hw_init(struct rt305x_esw *esw)
 113 {
 114         int i;
 115
 116         /* vodoo from original driver */
 117         rt305x_esw_wr(esw, 0xC8A07850, RT305X_ESW_REG_FCT0);
 118         rt305x_esw_wr(esw, 0x00000000, RT305X_ESW_REG_SGC2);
 119         rt305x_esw_wr(esw, 0x00405555, RT305X_ESW_REG_PFC1);
 120         rt305x_esw_wr(esw, 0x00002001, RT305X_ESW_REG_VLANI(0));
 121         rt305x_esw_wr(esw, 0x00007f7f, RT305X_ESW_REG_POC1);
 122         rt305x_esw_wr(esw, 0x00007f3f, RT305X_ESW_REG_POC3);
 123         rt305x_esw_wr(esw, 0x00d6500c, RT305X_ESW_REG_FCT2);
 124         rt305x_esw_wr(esw, 0x0008a301, RT305X_ESW_REG_SGC);
 125         rt305x_esw_wr(esw, 0x02404040, RT305X_ESW_REG_SOCPC);
 126         rt305x_esw_wr(esw, 0x00001002, RT305X_ESW_REG_PVIDC(2));
 127         rt305x_esw_wr(esw, 0x3f502b28, RT305X_ESW_REG_FPA2);
 128         rt305x_esw_wr(esw, 0x00000000, RT305X_ESW_REG_FPA);
 129
 130         rt305x_mii_write(esw, 0, 31, 0x8000);
 131         for (i = 0; i < 5; i++) {
 132                 /* TX10 waveform coefficient */
 133                 rt305x_mii_write(esw, i, 0, 0x3100);
 134                 /* TX10 waveform coefficient */
 135                 rt305x_mii_write(esw, i, 26, 0x1601);
 136                 /* TX100/TX10 AD/DA current bias */
 137                 rt305x_mii_write(esw, i, 29, 0x7058);
 138                 /* TX100 slew rate control */
 139                 rt305x_mii_write(esw, i, 30, 0x0018);
 140         }
 141
 142         /* PHY IOT */
 143         /* select global register */
 144         rt305x_mii_write(esw, 0, 31, 0x0);
 145         /* tune TP_IDL tail and head waveform */
 146         rt305x_mii_write(esw, 0, 22, 0x052f);
 147         /* set TX10 signal amplitude threshold to minimum */
 148         rt305x_mii_write(esw, 0, 17, 0x0fe0);
 149         /* set squelch amplitude to higher threshold */
 150         rt305x_mii_write(esw, 0, 18, 0x40ba);
 151         /* longer TP_IDL tail length */
 152         rt305x_mii_write(esw, 0, 14, 0x65);
 153         /* select local register */
 154         rt305x_mii_write(esw, 0, 31, 0x8000);
 155
 156         /* set default vlan */
 157         rt305x_esw_wr(esw, 0x2001, RT305X_ESW_REG_VLANI(0));
 158         rt305x_esw_wr(esw, 0x504f, RT305X_ESW_REG_VMSC(0));
 159 }
 160
 161 static int
 162 rt305x_esw_probe(struct platform_device *pdev)
 163 {
 164         struct rt305x_esw_platform_data *pdata;
 165         struct rt305x_esw *esw;
 166         struct resource *res;
 167         int err;
 168
 169         pdata = pdev->dev.platform_data;
 170         if (!pdata)
 171                 return -EINVAL;
 172
 173         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 174         if (!res) {
 175                 dev_err(&pdev->dev, "no memory resource found\n");
 176                 return -ENOMEM;
 177         }
 178
 179         esw = kzalloc(sizeof(struct rt305x_esw), GFP_KERNEL);
 180         if (!esw) {
 181                 dev_err(&pdev->dev, "no memory for private data\n");
 182                 return -ENOMEM;
 183         }
 184
 185         esw->base = ioremap(res->start, resource_size(res));
 186         if (!esw->base) {
 187                 dev_err(&pdev->dev, "ioremap failed\n");
 188                 err = -ENOMEM;
 189                 goto free_esw;
 190         }
 191
 192         platform_set_drvdata(pdev, esw);
 193
 194         esw->pdata = pdata;
 195         spin_lock_init(&esw->reg_rw_lock);
 196         rt305x_esw_hw_init(esw);
 197
 198         return 0;
 199
 200 free_esw:
 201         kfree(esw);
 202         return err;
 203 }
 204
 205 static int
 206 rt305x_esw_remove(struct platform_device *pdev)
 207 {
 208         struct rt305x_esw *esw;
 209
 210         esw = platform_get_drvdata(pdev);
 211         if (esw) {
 212                 platform_set_drvdata(pdev, NULL);
 213                 iounmap(esw->base);
 214                 kfree(esw);
 215         }
 216
 217         return 0;
 218 }
 219
 220 static struct platform_driver rt305x_esw_driver = {
 221         .probe = rt305x_esw_probe,
 222         .remove = rt305x_esw_remove,
 223         .driver = {
 224                 .name = "rt305x-esw",
 225                 .owner = THIS_MODULE,
 226         },
 227 };
 228
 229 static int __init
 230 rt305x_esw_init(void)
 231 {
 232         return platform_driver_register(&rt305x_esw_driver);
 233 }
 234
 235 static void __exit
 236 rt305x_esw_exit(void)
 237 {
 238         platform_driver_unregister(&rt305x_esw_driver);
 239 }