arch/mips/bcm63xx/dev-enet.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/export.h>
  13 #include <bcm63xx_dev_enet.h>
  14 #include <bcm63xx_io.h>
  15 #include <bcm63xx_regs.h>
  16
  17 static const unsigned long bcm6348_regs_enetdmac[] = {
  18         [ENETDMAC_CHANCFG]      = ENETDMAC_CHANCFG_REG,
  19         [ENETDMAC_IR]           = ENETDMAC_IR_REG,
  20         [ENETDMAC_IRMASK]       = ENETDMAC_IRMASK_REG,
  21         [ENETDMAC_MAXBURST]     = ENETDMAC_MAXBURST_REG,
  22 };
  23
  24 static const unsigned long bcm6345_regs_enetdmac[] = {
  25         [ENETDMAC_CHANCFG]      = ENETDMA_6345_CHANCFG_REG,
  26         [ENETDMAC_IR]           = ENETDMA_6345_IR_REG,
  27         [ENETDMAC_IRMASK]       = ENETDMA_6345_IRMASK_REG,
  28         [ENETDMAC_MAXBURST]     = ENETDMA_6345_MAXBURST_REG,
  29         [ENETDMAC_BUFALLOC]     = ENETDMA_6345_BUFALLOC_REG,
  30         [ENETDMAC_RSTART]       = ENETDMA_6345_RSTART_REG,
  31         [ENETDMAC_FC]           = ENETDMA_6345_FC_REG,
  32         [ENETDMAC_LEN]          = ENETDMA_6345_LEN_REG,
  33 };
  34
  35 const unsigned long *bcm63xx_regs_enetdmac;
  36 EXPORT_SYMBOL(bcm63xx_regs_enetdmac);
  37
  38 static __init void bcm63xx_enetdmac_regs_init(void)
  39 {
  40         if (BCMCPU_IS_6345())
  41                 bcm63xx_regs_enetdmac = bcm6345_regs_enetdmac;
  42         else
  43                 bcm63xx_regs_enetdmac = bcm6348_regs_enetdmac;
  44 }
  45
  46 static struct resource shared_res[] = {
  47         {
  48                 .start          = -1, /* filled at runtime */
  49                 .end            = -1, /* filled at runtime */
  50                 .flags          = IORESOURCE_MEM,
  51         },
  52         {
  53                 .start          = -1, /* filled at runtime */
  54                 .end            = -1, /* filled at runtime */
  55                 .flags          = IORESOURCE_MEM,
  56         },
  57         {
  58                 .start          = -1, /* filled at runtime */
  59                 .end            = -1, /* filled at runtime */
  60                 .flags          = IORESOURCE_MEM,
  61         },
  62 };
  63
  64 static struct platform_device bcm63xx_enet_shared_device = {
  65         .name           = "bcm63xx_enet_shared",
  66         .id             = 0,
  67         .num_resources  = ARRAY_SIZE(shared_res),
  68         .resource       = shared_res,
  69 };
  70
  71 static int shared_device_registered;
  72
  73 static u64 enet_dmamask = DMA_BIT_MASK(32);
  74
  75 static struct resource enet0_res[] = {
  76         {
  77                 .start          = -1, /* filled at runtime */
  78                 .end            = -1, /* filled at runtime */
  79                 .flags          = IORESOURCE_MEM,
  80         },
  81         {
  82                 .start          = -1, /* filled at runtime */
  83                 .flags          = IORESOURCE_IRQ,
  84         },
  85         {
  86                 .start          = -1, /* filled at runtime */
  87                 .flags          = IORESOURCE_IRQ,
  88         },
  89         {
  90                 .start          = -1, /* filled at runtime */
  91                 .flags          = IORESOURCE_IRQ,
  92         },
  93 };
  94
  95 static struct bcm63xx_enet_platform_data enet0_pd;
  96
  97 static struct platform_device bcm63xx_enet0_device = {
  98         .name           = "bcm63xx_enet",
  99         .id             = 0,
 100         .num_resources  = ARRAY_SIZE(enet0_res),
 101         .resource       = enet0_res,
 102         .dev            = {
 103                 .platform_data = &enet0_pd,
 104                 .dma_mask = &enet_dmamask,
 105                 .coherent_dma_mask = DMA_BIT_MASK(32),
 106         },
 107 };
 108
 109 static struct resource enet1_res[] = {
 110         {
 111                 .start          = -1, /* filled at runtime */
 112                 .end            = -1, /* filled at runtime */
 113                 .flags          = IORESOURCE_MEM,
 114         },
 115         {
 116                 .start          = -1, /* filled at runtime */
 117                 .flags          = IORESOURCE_IRQ,
 118         },
 119         {
 120                 .start          = -1, /* filled at runtime */
 121                 .flags          = IORESOURCE_IRQ,
 122         },
 123         {
 124                 .start          = -1, /* filled at runtime */
 125                 .flags          = IORESOURCE_IRQ,
 126         },
 127 };
 128
 129 static struct bcm63xx_enet_platform_data enet1_pd;
 130
 131 static struct platform_device bcm63xx_enet1_device = {
 132         .name           = "bcm63xx_enet",
 133         .id             = 1,
 134         .num_resources  = ARRAY_SIZE(enet1_res),
 135         .resource       = enet1_res,
 136         .dev            = {
 137                 .platform_data = &enet1_pd,
 138                 .dma_mask = &enet_dmamask,
 139                 .coherent_dma_mask = DMA_BIT_MASK(32),
 140         },
 141 };
 142
 143 static struct resource enetsw_res[] = {
 144         {
 145                 /* start & end filled at runtime */
 146                 .flags          = IORESOURCE_MEM,
 147         },
 148         {
 149                 /* start filled at runtime */
 150                 .flags          = IORESOURCE_IRQ,
 151         },
 152         {
 153                 /* start filled at runtime */
 154                 .flags          = IORESOURCE_IRQ,
 155         },
 156 };
 157
 158 static struct bcm63xx_enetsw_platform_data enetsw_pd;
 159
 160 static struct platform_device bcm63xx_enetsw_device = {
 161         .name           = "bcm63xx_enetsw",
 162         .num_resources  = ARRAY_SIZE(enetsw_res),
 163         .resource       = enetsw_res,
 164         .dev            = {
 165                 .platform_data = &enetsw_pd,
 166                 .dma_mask = &enet_dmamask,
 167                 .coherent_dma_mask = DMA_BIT_MASK(32),
 168         },
 169 };
 170
 171 static int __init register_shared(void)
 172 {
 173         int ret, chan_count;
 174
 175         if (shared_device_registered)
 176                 return 0;
 177
 178         bcm63xx_enetdmac_regs_init();
 179
 180         shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
 181         shared_res[0].end = shared_res[0].start;
 182         if (BCMCPU_IS_6345())
 183                 shared_res[0].end += (RSET_6345_ENETDMA_SIZE) - 1;
 184         else
 185                 shared_res[0].end += (RSET_ENETDMA_SIZE)  - 1;
 186
 187         if (BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_6368())
 188                 chan_count = 32;
 189         else if (BCMCPU_IS_6345())
 190                 chan_count = 8;
 191         else
 192                 chan_count = 16;
 193
 194         shared_res[1].start = bcm63xx_regset_address(RSET_ENETDMAC);
 195         shared_res[1].end = shared_res[1].start;
 196         shared_res[1].end += RSET_ENETDMAC_SIZE(chan_count)  - 1;
 197
 198         shared_res[2].start = bcm63xx_regset_address(RSET_ENETDMAS);
 199         shared_res[2].end = shared_res[2].start;
 200         shared_res[2].end += RSET_ENETDMAS_SIZE(chan_count)  - 1;
 201
 202         ret = platform_device_register(&bcm63xx_enet_shared_device);
 203         if (ret)
 204                 return ret;
 205         shared_device_registered = 1;
 206
 207         return 0;
 208 }
 209
 210 int __init bcm63xx_enet_register(int unit,
 211                                  const struct bcm63xx_enet_platform_data *pd)
 212 {
 213         struct platform_device *pdev;
 214         struct bcm63xx_enet_platform_data *dpd;
 215         int ret;
 216
 217         if (unit > 1)
 218                 return -ENODEV;
 219
 220         if (unit == 1 && (BCMCPU_IS_6338() || BCMCPU_IS_6345()))
 221                 return -ENODEV;
 222
 223         ret = register_shared();
 224         if (ret)
 225                 return ret;
 226
 227         if (unit == 0) {
 228                 enet0_res[0].start = bcm63xx_regset_address(RSET_ENET0);
 229                 enet0_res[0].end = enet0_res[0].start;
 230                 enet0_res[0].end += RSET_ENET_SIZE - 1;
 231                 enet0_res[1].start = bcm63xx_get_irq_number(IRQ_ENET0);
 232                 enet0_res[2].start = bcm63xx_get_irq_number(IRQ_ENET0_RXDMA);
 233                 enet0_res[3].start = bcm63xx_get_irq_number(IRQ_ENET0_TXDMA);
 234                 pdev = &bcm63xx_enet0_device;
 235         } else {
 236                 enet1_res[0].start = bcm63xx_regset_address(RSET_ENET1);
 237                 enet1_res[0].end = enet1_res[0].start;
 238                 enet1_res[0].end += RSET_ENET_SIZE - 1;
 239                 enet1_res[1].start = bcm63xx_get_irq_number(IRQ_ENET1);
 240                 enet1_res[2].start = bcm63xx_get_irq_number(IRQ_ENET1_RXDMA);
 241                 enet1_res[3].start = bcm63xx_get_irq_number(IRQ_ENET1_TXDMA);
 242                 pdev = &bcm63xx_enet1_device;
 243         }
 244
 245         /* copy given platform data */
 246         dpd = pdev->dev.platform_data;
 247         memcpy(dpd, pd, sizeof(*pd));
 248
 249         /* adjust them in case internal phy is used */
 250         if (dpd->use_internal_phy) {
 251
 252                 /* internal phy only exists for enet0 */
 253                 if (unit == 1)
 254                         return -ENODEV;
 255
 256                 dpd->phy_id = 1;
 257                 dpd->has_phy_interrupt = 1;
 258                 dpd->phy_interrupt = bcm63xx_get_irq_number(IRQ_ENET_PHY);
 259         }
 260
 261         dpd->dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
 262         dpd->dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;
 263         if (BCMCPU_IS_6345()) {
 264                 dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_CHAINING_MASK;
 265                 dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_WRAP_EN_MASK;
 266                 dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_FLOWC_EN_MASK;
 267                 dpd->dma_chan_int_mask |= ENETDMA_IR_BUFDONE_MASK;
 268                 dpd->dma_chan_int_mask |= ENETDMA_IR_NOTOWNER_MASK;
 269                 dpd->dma_chan_width = ENETDMA_6345_CHAN_WIDTH;
 270                 dpd->dma_desc_shift = ENETDMA_6345_DESC_SHIFT;
 271         } else {
 272                 dpd->dma_has_sram = true;
 273                 dpd->dma_chan_width = ENETDMA_CHAN_WIDTH;
 274         }
 275
 276         if (unit == 0) {
 277                 dpd->rx_chan = 0;
 278                 dpd->tx_chan = 1;
 279         } else {
 280                 dpd->rx_chan = 2;
 281                 dpd->tx_chan = 3;
 282         }
 283
 284         ret = platform_device_register(pdev);
 285         if (ret)
 286                 return ret;
 287         return 0;
 288 }
 289
 290 int __init
 291 bcm63xx_enetsw_register(const struct bcm63xx_enetsw_platform_data *pd)
 292 {
 293         int ret;
 294
 295         if (!BCMCPU_IS_6328() && !BCMCPU_IS_6362() && !BCMCPU_IS_6368())
 296                 return -ENODEV;
 297
 298         ret = register_shared();
 299         if (ret)
 300                 return ret;
 301
 302         enetsw_res[0].start = bcm63xx_regset_address(RSET_ENETSW);
 303         enetsw_res[0].end = enetsw_res[0].start;
 304         enetsw_res[0].end += RSET_ENETSW_SIZE - 1;
 305         enetsw_res[1].start = bcm63xx_get_irq_number(IRQ_ENETSW_RXDMA0);
 306         enetsw_res[2].start = bcm63xx_get_irq_number(IRQ_ENETSW_TXDMA0);
 307         if (!enetsw_res[2].start)
 308                 enetsw_res[2].start = -1;
 309
 310         memcpy(bcm63xx_enetsw_device.dev.platform_data, pd, sizeof(*pd));
 311
 312         if (BCMCPU_IS_6328())
 313                 enetsw_pd.num_ports = ENETSW_PORTS_6328;
 314         else if (BCMCPU_IS_6362() || BCMCPU_IS_6368())
 315                 enetsw_pd.num_ports = ENETSW_PORTS_6368;
 316
 317         enetsw_pd.dma_has_sram = true;
 318         enetsw_pd.dma_chan_width = ENETDMA_CHAN_WIDTH;
 319         enetsw_pd.dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
 320         enetsw_pd.dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;
 321
 322         ret = platform_device_register(&bcm63xx_enetsw_device);
 323         if (ret)
 324                 return ret;
 325
 326         return 0;
 327 }