drivers/soc/fsl/qe/ucc_fast.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2006 Freescale Semiconductor, Inc. All rights reserved.
   4  *
   5  * Authors:     Shlomi Gridish <gridish@freescale.com>
   6  *              Li Yang <leoli@freescale.com>
   7  *
   8  * Description:
   9  * QE UCC Fast API Set - UCC Fast specific routines implementations.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/slab.h>
  14 #include <linux/stddef.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/err.h>
  17 #include <linux/export.h>
  18
  19 #include <asm/io.h>
  20 #include <soc/fsl/qe/immap_qe.h>
  21 #include <soc/fsl/qe/qe.h>
  22
  23 #include <soc/fsl/qe/ucc.h>
  24 #include <soc/fsl/qe/ucc_fast.h>
  25
  26 void ucc_fast_dump_regs(struct ucc_fast_private * uccf)
  27 {
  28         printk(KERN_INFO "UCC%u Fast registers:\n", uccf->uf_info->ucc_num);
  29         printk(KERN_INFO "Base address: 0x%p\n", uccf->uf_regs);
  30
  31         printk(KERN_INFO "gumr  : addr=0x%p, val=0x%08x\n",
  32                   &uccf->uf_regs->gumr, qe_ioread32be(&uccf->uf_regs->gumr));
  33         printk(KERN_INFO "upsmr : addr=0x%p, val=0x%08x\n",
  34                   &uccf->uf_regs->upsmr, qe_ioread32be(&uccf->uf_regs->upsmr));
  35         printk(KERN_INFO "utodr : addr=0x%p, val=0x%04x\n",
  36                   &uccf->uf_regs->utodr, qe_ioread16be(&uccf->uf_regs->utodr));
  37         printk(KERN_INFO "udsr  : addr=0x%p, val=0x%04x\n",
  38                   &uccf->uf_regs->udsr, qe_ioread16be(&uccf->uf_regs->udsr));
  39         printk(KERN_INFO "ucce  : addr=0x%p, val=0x%08x\n",
  40                   &uccf->uf_regs->ucce, qe_ioread32be(&uccf->uf_regs->ucce));
  41         printk(KERN_INFO "uccm  : addr=0x%p, val=0x%08x\n",
  42                   &uccf->uf_regs->uccm, qe_ioread32be(&uccf->uf_regs->uccm));
  43         printk(KERN_INFO "uccs  : addr=0x%p, val=0x%02x\n",
  44                   &uccf->uf_regs->uccs, qe_ioread8(&uccf->uf_regs->uccs));
  45         printk(KERN_INFO "urfb  : addr=0x%p, val=0x%08x\n",
  46                   &uccf->uf_regs->urfb, qe_ioread32be(&uccf->uf_regs->urfb));
  47         printk(KERN_INFO "urfs  : addr=0x%p, val=0x%04x\n",
  48                   &uccf->uf_regs->urfs, qe_ioread16be(&uccf->uf_regs->urfs));
  49         printk(KERN_INFO "urfet : addr=0x%p, val=0x%04x\n",
  50                   &uccf->uf_regs->urfet, qe_ioread16be(&uccf->uf_regs->urfet));
  51         printk(KERN_INFO "urfset: addr=0x%p, val=0x%04x\n",
  52                   &uccf->uf_regs->urfset,
  53                   qe_ioread16be(&uccf->uf_regs->urfset));
  54         printk(KERN_INFO "utfb  : addr=0x%p, val=0x%08x\n",
  55                   &uccf->uf_regs->utfb, qe_ioread32be(&uccf->uf_regs->utfb));
  56         printk(KERN_INFO "utfs  : addr=0x%p, val=0x%04x\n",
  57                   &uccf->uf_regs->utfs, qe_ioread16be(&uccf->uf_regs->utfs));
  58         printk(KERN_INFO "utfet : addr=0x%p, val=0x%04x\n",
  59                   &uccf->uf_regs->utfet, qe_ioread16be(&uccf->uf_regs->utfet));
  60         printk(KERN_INFO "utftt : addr=0x%p, val=0x%04x\n",
  61                   &uccf->uf_regs->utftt, qe_ioread16be(&uccf->uf_regs->utftt));
  62         printk(KERN_INFO "utpt  : addr=0x%p, val=0x%04x\n",
  63                   &uccf->uf_regs->utpt, qe_ioread16be(&uccf->uf_regs->utpt));
  64         printk(KERN_INFO "urtry : addr=0x%p, val=0x%08x\n",
  65                   &uccf->uf_regs->urtry, qe_ioread32be(&uccf->uf_regs->urtry));
  66         printk(KERN_INFO "guemr : addr=0x%p, val=0x%02x\n",
  67                   &uccf->uf_regs->guemr, qe_ioread8(&uccf->uf_regs->guemr));
  68 }
  69 EXPORT_SYMBOL(ucc_fast_dump_regs);
  70
  71 u32 ucc_fast_get_qe_cr_subblock(int uccf_num)
  72 {
  73         switch (uccf_num) {
  74         case 0: return QE_CR_SUBBLOCK_UCCFAST1;
  75         case 1: return QE_CR_SUBBLOCK_UCCFAST2;
  76         case 2: return QE_CR_SUBBLOCK_UCCFAST3;
  77         case 3: return QE_CR_SUBBLOCK_UCCFAST4;
  78         case 4: return QE_CR_SUBBLOCK_UCCFAST5;
  79         case 5: return QE_CR_SUBBLOCK_UCCFAST6;
  80         case 6: return QE_CR_SUBBLOCK_UCCFAST7;
  81         case 7: return QE_CR_SUBBLOCK_UCCFAST8;
  82         default: return QE_CR_SUBBLOCK_INVALID;
  83         }
  84 }
  85 EXPORT_SYMBOL(ucc_fast_get_qe_cr_subblock);
  86
  87 void ucc_fast_transmit_on_demand(struct ucc_fast_private * uccf)
  88 {
  89         qe_iowrite16be(UCC_FAST_TOD, &uccf->uf_regs->utodr);
  90 }
  91 EXPORT_SYMBOL(ucc_fast_transmit_on_demand);
  92
  93 void ucc_fast_enable(struct ucc_fast_private * uccf, enum comm_dir mode)
  94 {
  95         struct ucc_fast __iomem *uf_regs;
  96         u32 gumr;
  97
  98         uf_regs = uccf->uf_regs;
  99
 100         /* Enable reception and/or transmission on this UCC. */
 101         gumr = qe_ioread32be(&uf_regs->gumr);
 102         if (mode & COMM_DIR_TX) {
 103                 gumr |= UCC_FAST_GUMR_ENT;
 104                 uccf->enabled_tx = 1;
 105         }
 106         if (mode & COMM_DIR_RX) {
 107                 gumr |= UCC_FAST_GUMR_ENR;
 108                 uccf->enabled_rx = 1;
 109         }
 110         qe_iowrite32be(gumr, &uf_regs->gumr);
 111 }
 112 EXPORT_SYMBOL(ucc_fast_enable);
 113
 114 void ucc_fast_disable(struct ucc_fast_private * uccf, enum comm_dir mode)
 115 {
 116         struct ucc_fast __iomem *uf_regs;
 117         u32 gumr;
 118
 119         uf_regs = uccf->uf_regs;
 120
 121         /* Disable reception and/or transmission on this UCC. */
 122         gumr = qe_ioread32be(&uf_regs->gumr);
 123         if (mode & COMM_DIR_TX) {
 124                 gumr &= ~UCC_FAST_GUMR_ENT;
 125                 uccf->enabled_tx = 0;
 126         }
 127         if (mode & COMM_DIR_RX) {
 128                 gumr &= ~UCC_FAST_GUMR_ENR;
 129                 uccf->enabled_rx = 0;
 130         }
 131         qe_iowrite32be(gumr, &uf_regs->gumr);
 132 }
 133 EXPORT_SYMBOL(ucc_fast_disable);
 134
 135 int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** uccf_ret)
 136 {
 137         struct ucc_fast_private *uccf;
 138         struct ucc_fast __iomem *uf_regs;
 139         u32 gumr;
 140         int ret;
 141
 142         if (!uf_info)
 143                 return -EINVAL;
 144
 145         /* check if the UCC port number is in range. */
 146         if ((uf_info->ucc_num < 0) || (uf_info->ucc_num > UCC_MAX_NUM - 1)) {
 147                 printk(KERN_ERR "%s: illegal UCC number\n", __func__);
 148                 return -EINVAL;
 149         }
 150
 151         /* Check that 'max_rx_buf_length' is properly aligned (4). */
 152         if (uf_info->max_rx_buf_length & (UCC_FAST_MRBLR_ALIGNMENT - 1)) {
 153                 printk(KERN_ERR "%s: max_rx_buf_length not aligned\n",
 154                         __func__);
 155                 return -EINVAL;
 156         }
 157
 158         /* Validate Virtual Fifo register values */
 159         if (uf_info->urfs < UCC_FAST_URFS_MIN_VAL) {
 160                 printk(KERN_ERR "%s: urfs is too small\n", __func__);
 161                 return -EINVAL;
 162         }
 163
 164         if (uf_info->urfs & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
 165                 printk(KERN_ERR "%s: urfs is not aligned\n", __func__);
 166                 return -EINVAL;
 167         }
 168
 169         if (uf_info->urfet & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
 170                 printk(KERN_ERR "%s: urfet is not aligned.\n", __func__);
 171                 return -EINVAL;
 172         }
 173
 174         if (uf_info->urfset & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
 175                 printk(KERN_ERR "%s: urfset is not aligned\n", __func__);
 176                 return -EINVAL;
 177         }
 178
 179         if (uf_info->utfs & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
 180                 printk(KERN_ERR "%s: utfs is not aligned\n", __func__);
 181                 return -EINVAL;
 182         }
 183
 184         if (uf_info->utfet & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
 185                 printk(KERN_ERR "%s: utfet is not aligned\n", __func__);
 186                 return -EINVAL;
 187         }
 188
 189         if (uf_info->utftt & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
 190                 printk(KERN_ERR "%s: utftt is not aligned\n", __func__);
 191                 return -EINVAL;
 192         }
 193
 194         uccf = kzalloc(sizeof(struct ucc_fast_private), GFP_KERNEL);
 195         if (!uccf) {
 196                 printk(KERN_ERR "%s: Cannot allocate private data\n",
 197                         __func__);
 198                 return -ENOMEM;
 199         }
 200         uccf->ucc_fast_tx_virtual_fifo_base_offset = -1;
 201         uccf->ucc_fast_rx_virtual_fifo_base_offset = -1;
 202
 203         /* Fill fast UCC structure */
 204         uccf->uf_info = uf_info;
 205         /* Set the PHY base address */
 206         uccf->uf_regs = ioremap(uf_info->regs, sizeof(struct ucc_fast));
 207         if (uccf->uf_regs == NULL) {
 208                 printk(KERN_ERR "%s: Cannot map UCC registers\n", __func__);
 209                 kfree(uccf);
 210                 return -ENOMEM;
 211         }
 212
 213         uccf->enabled_tx = 0;
 214         uccf->enabled_rx = 0;
 215         uccf->stopped_tx = 0;
 216         uccf->stopped_rx = 0;
 217         uf_regs = uccf->uf_regs;
 218         uccf->p_ucce = &uf_regs->ucce;
 219         uccf->p_uccm = &uf_regs->uccm;
 220 #ifdef CONFIG_UGETH_TX_ON_DEMAND
 221         uccf->p_utodr = &uf_regs->utodr;
 222 #endif
 223 #ifdef STATISTICS
 224         uccf->tx_frames = 0;
 225         uccf->rx_frames = 0;
 226         uccf->rx_discarded = 0;
 227 #endif                          /* STATISTICS */
 228
 229         /* Set UCC to fast type */
 230         ret = ucc_set_type(uf_info->ucc_num, UCC_SPEED_TYPE_FAST);
 231         if (ret) {
 232                 printk(KERN_ERR "%s: cannot set UCC type\n", __func__);
 233                 ucc_fast_free(uccf);
 234                 return ret;
 235         }
 236
 237         uccf->mrblr = uf_info->max_rx_buf_length;
 238
 239         /* Set GUMR */
 240         /* For more details see the hardware spec. */
 241         gumr = uf_info->ttx_trx;
 242         if (uf_info->tci)
 243                 gumr |= UCC_FAST_GUMR_TCI;
 244         if (uf_info->cdp)
 245                 gumr |= UCC_FAST_GUMR_CDP;
 246         if (uf_info->ctsp)
 247                 gumr |= UCC_FAST_GUMR_CTSP;
 248         if (uf_info->cds)
 249                 gumr |= UCC_FAST_GUMR_CDS;
 250         if (uf_info->ctss)
 251                 gumr |= UCC_FAST_GUMR_CTSS;
 252         if (uf_info->txsy)
 253                 gumr |= UCC_FAST_GUMR_TXSY;
 254         if (uf_info->rsyn)
 255                 gumr |= UCC_FAST_GUMR_RSYN;
 256         gumr |= uf_info->synl;
 257         if (uf_info->rtsm)
 258                 gumr |= UCC_FAST_GUMR_RTSM;
 259         gumr |= uf_info->renc;
 260         if (uf_info->revd)
 261                 gumr |= UCC_FAST_GUMR_REVD;
 262         gumr |= uf_info->tenc;
 263         gumr |= uf_info->tcrc;
 264         gumr |= uf_info->mode;
 265         qe_iowrite32be(gumr, &uf_regs->gumr);
 266
 267         /* Allocate memory for Tx Virtual Fifo */
 268         uccf->ucc_fast_tx_virtual_fifo_base_offset =
 269             qe_muram_alloc(uf_info->utfs, UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
 270         if (uccf->ucc_fast_tx_virtual_fifo_base_offset < 0) {
 271                 printk(KERN_ERR "%s: cannot allocate MURAM for TX FIFO\n",
 272                         __func__);
 273                 ucc_fast_free(uccf);
 274                 return -ENOMEM;
 275         }
 276
 277         /* Allocate memory for Rx Virtual Fifo */
 278         uccf->ucc_fast_rx_virtual_fifo_base_offset =
 279                 qe_muram_alloc(uf_info->urfs +
 280                            UCC_FAST_RECEIVE_VIRTUAL_FIFO_SIZE_FUDGE_FACTOR,
 281                            UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
 282         if (uccf->ucc_fast_rx_virtual_fifo_base_offset < 0) {
 283                 printk(KERN_ERR "%s: cannot allocate MURAM for RX FIFO\n",
 284                         __func__);
 285                 ucc_fast_free(uccf);
 286                 return -ENOMEM;
 287         }
 288
 289         /* Set Virtual Fifo registers */
 290         qe_iowrite16be(uf_info->urfs, &uf_regs->urfs);
 291         qe_iowrite16be(uf_info->urfet, &uf_regs->urfet);
 292         qe_iowrite16be(uf_info->urfset, &uf_regs->urfset);
 293         qe_iowrite16be(uf_info->utfs, &uf_regs->utfs);
 294         qe_iowrite16be(uf_info->utfet, &uf_regs->utfet);
 295         qe_iowrite16be(uf_info->utftt, &uf_regs->utftt);
 296         /* utfb, urfb are offsets from MURAM base */
 297         qe_iowrite32be(uccf->ucc_fast_tx_virtual_fifo_base_offset,
 298                        &uf_regs->utfb);
 299         qe_iowrite32be(uccf->ucc_fast_rx_virtual_fifo_base_offset,
 300                        &uf_regs->urfb);
 301
 302         /* Mux clocking */
 303         /* Grant Support */
 304         ucc_set_qe_mux_grant(uf_info->ucc_num, uf_info->grant_support);
 305         /* Breakpoint Support */
 306         ucc_set_qe_mux_bkpt(uf_info->ucc_num, uf_info->brkpt_support);
 307         /* Set Tsa or NMSI mode. */
 308         ucc_set_qe_mux_tsa(uf_info->ucc_num, uf_info->tsa);
 309         /* If NMSI (not Tsa), set Tx and Rx clock. */
 310         if (!uf_info->tsa) {
 311                 /* Rx clock routing */
 312                 if ((uf_info->rx_clock != QE_CLK_NONE) &&
 313                     ucc_set_qe_mux_rxtx(uf_info->ucc_num, uf_info->rx_clock,
 314                                         COMM_DIR_RX)) {
 315                         printk(KERN_ERR "%s: illegal value for RX clock\n",
 316                                __func__);
 317                         ucc_fast_free(uccf);
 318                         return -EINVAL;
 319                 }
 320                 /* Tx clock routing */
 321                 if ((uf_info->tx_clock != QE_CLK_NONE) &&
 322                     ucc_set_qe_mux_rxtx(uf_info->ucc_num, uf_info->tx_clock,
 323                                         COMM_DIR_TX)) {
 324                         printk(KERN_ERR "%s: illegal value for TX clock\n",
 325                                __func__);
 326                         ucc_fast_free(uccf);
 327                         return -EINVAL;
 328                 }
 329         } else {
 330                 /* tdm Rx clock routing */
 331                 if ((uf_info->rx_clock != QE_CLK_NONE) &&
 332                     ucc_set_tdm_rxtx_clk(uf_info->tdm_num, uf_info->rx_clock,
 333                                          COMM_DIR_RX)) {
 334                         pr_err("%s: illegal value for RX clock", __func__);
 335                         ucc_fast_free(uccf);
 336                         return -EINVAL;
 337                 }
 338
 339                 /* tdm Tx clock routing */
 340                 if ((uf_info->tx_clock != QE_CLK_NONE) &&
 341                     ucc_set_tdm_rxtx_clk(uf_info->tdm_num, uf_info->tx_clock,
 342                                          COMM_DIR_TX)) {
 343                         pr_err("%s: illegal value for TX clock", __func__);
 344                         ucc_fast_free(uccf);
 345                         return -EINVAL;
 346                 }
 347
 348                 /* tdm Rx sync clock routing */
 349                 if ((uf_info->rx_sync != QE_CLK_NONE) &&
 350                     ucc_set_tdm_rxtx_sync(uf_info->tdm_num, uf_info->rx_sync,
 351                                           COMM_DIR_RX)) {
 352                         pr_err("%s: illegal value for RX clock", __func__);
 353                         ucc_fast_free(uccf);
 354                         return -EINVAL;
 355                 }
 356
 357                 /* tdm Tx sync clock routing */
 358                 if ((uf_info->tx_sync != QE_CLK_NONE) &&
 359                     ucc_set_tdm_rxtx_sync(uf_info->tdm_num, uf_info->tx_sync,
 360                                           COMM_DIR_TX)) {
 361                         pr_err("%s: illegal value for TX clock", __func__);
 362                         ucc_fast_free(uccf);
 363                         return -EINVAL;
 364                 }
 365         }
 366
 367         /* Set interrupt mask register at UCC level. */
 368         qe_iowrite32be(uf_info->uccm_mask, &uf_regs->uccm);
 369
 370         /* First, clear anything pending at UCC level,
 371          * otherwise, old garbage may come through
 372          * as soon as the dam is opened. */
 373
 374         /* Writing '1' clears */
 375         qe_iowrite32be(0xffffffff, &uf_regs->ucce);
 376
 377         *uccf_ret = uccf;
 378         return 0;
 379 }
 380 EXPORT_SYMBOL(ucc_fast_init);
 381
 382 void ucc_fast_free(struct ucc_fast_private * uccf)
 383 {
 384         if (!uccf)
 385                 return;
 386
 387         qe_muram_free(uccf->ucc_fast_tx_virtual_fifo_base_offset);
 388         qe_muram_free(uccf->ucc_fast_rx_virtual_fifo_base_offset);
 389
 390         if (uccf->uf_regs)
 391                 iounmap(uccf->uf_regs);
 392
 393         kfree(uccf);
 394 }
 395 EXPORT_SYMBOL(ucc_fast_free);