drivers/soc/fsl/qe/qe_tdm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2015 Freescale Semiconductor, Inc. All rights reserved.
   4  *
   5  * Authors:     Zhao Qiang <qiang.zhao@nxp.com>
   6  *
   7  * Description:
   8  * QE TDM API Set - TDM specific routines implementations.
   9  */
  10 #include <linux/io.h>
  11 #include <linux/kernel.h>
  12 #include <linux/of_address.h>
  13 #include <linux/of_irq.h>
  14 #include <linux/of_platform.h>
  15 #include <soc/fsl/qe/qe_tdm.h>
  16
  17 static int set_tdm_framer(const char *tdm_framer_type)
  18 {
  19         if (strcmp(tdm_framer_type, "e1") == 0)
  20                 return TDM_FRAMER_E1;
  21         else if (strcmp(tdm_framer_type, "t1") == 0)
  22                 return TDM_FRAMER_T1;
  23         else
  24                 return -EINVAL;
  25 }
  26
  27 static void set_si_param(struct ucc_tdm *utdm, struct ucc_tdm_info *ut_info)
  28 {
  29         struct si_mode_info *si_info = &ut_info->si_info;
  30
  31         if (utdm->tdm_mode == TDM_INTERNAL_LOOPBACK) {
  32                 si_info->simr_crt = 1;
  33                 si_info->simr_rfsd = 0;
  34         }
  35 }
  36
  37 int ucc_of_parse_tdm(struct device_node *np, struct ucc_tdm *utdm,
  38                      struct ucc_tdm_info *ut_info)
  39 {
  40         const char *sprop;
  41         int ret = 0;
  42         u32 val;
  43
  44         sprop = of_get_property(np, "fsl,rx-sync-clock", NULL);
  45         if (sprop) {
  46                 ut_info->uf_info.rx_sync = qe_clock_source(sprop);
  47                 if ((ut_info->uf_info.rx_sync < QE_CLK_NONE) ||
  48                     (ut_info->uf_info.rx_sync > QE_RSYNC_PIN)) {
  49                         pr_err("QE-TDM: Invalid rx-sync-clock property\n");
  50                         return -EINVAL;
  51                 }
  52         } else {
  53                 pr_err("QE-TDM: Invalid rx-sync-clock property\n");
  54                 return -EINVAL;
  55         }
  56
  57         sprop = of_get_property(np, "fsl,tx-sync-clock", NULL);
  58         if (sprop) {
  59                 ut_info->uf_info.tx_sync = qe_clock_source(sprop);
  60                 if ((ut_info->uf_info.tx_sync < QE_CLK_NONE) ||
  61                     (ut_info->uf_info.tx_sync > QE_TSYNC_PIN)) {
  62                         pr_err("QE-TDM: Invalid tx-sync-clock property\n");
  63                 return -EINVAL;
  64                 }
  65         } else {
  66                 pr_err("QE-TDM: Invalid tx-sync-clock property\n");
  67                 return -EINVAL;
  68         }
  69
  70         ret = of_property_read_u32_index(np, "fsl,tx-timeslot-mask", 0, &val);
  71         if (ret) {
  72                 pr_err("QE-TDM: Invalid tx-timeslot-mask property\n");
  73                 return -EINVAL;
  74         }
  75         utdm->tx_ts_mask = val;
  76
  77         ret = of_property_read_u32_index(np, "fsl,rx-timeslot-mask", 0, &val);
  78         if (ret) {
  79                 ret = -EINVAL;
  80                 pr_err("QE-TDM: Invalid rx-timeslot-mask property\n");
  81                 return ret;
  82         }
  83         utdm->rx_ts_mask = val;
  84
  85         ret = of_property_read_u32_index(np, "fsl,tdm-id", 0, &val);
  86         if (ret) {
  87                 ret = -EINVAL;
  88                 pr_err("QE-TDM: No fsl,tdm-id property for this UCC\n");
  89                 return ret;
  90         }
  91         utdm->tdm_port = val;
  92         ut_info->uf_info.tdm_num = utdm->tdm_port;
  93
  94         if (of_property_read_bool(np, "fsl,tdm-internal-loopback"))
  95                 utdm->tdm_mode = TDM_INTERNAL_LOOPBACK;
  96         else
  97                 utdm->tdm_mode = TDM_NORMAL;
  98
  99         sprop = of_get_property(np, "fsl,tdm-framer-type", NULL);
 100         if (!sprop) {
 101                 ret = -EINVAL;
 102                 pr_err("QE-TDM: No tdm-framer-type property for UCC\n");
 103                 return ret;
 104         }
 105         ret = set_tdm_framer(sprop);
 106         if (ret < 0)
 107                 return -EINVAL;
 108         utdm->tdm_framer_type = ret;
 109
 110         ret = of_property_read_u32_index(np, "fsl,siram-entry-id", 0, &val);
 111         if (ret) {
 112                 ret = -EINVAL;
 113                 pr_err("QE-TDM: No siram entry id for UCC\n");
 114                 return ret;
 115         }
 116         utdm->siram_entry_id = val;
 117
 118         set_si_param(utdm, ut_info);
 119         return ret;
 120 }
 121 EXPORT_SYMBOL(ucc_of_parse_tdm);
 122
 123 void ucc_tdm_init(struct ucc_tdm *utdm, struct ucc_tdm_info *ut_info)
 124 {
 125         struct si1 __iomem *si_regs;
 126         u16 __iomem *siram;
 127         u16 siram_entry_valid;
 128         u16 siram_entry_closed;
 129         u16 ucc_num;
 130         u8 csel;
 131         u16 sixmr;
 132         u16 tdm_port;
 133         u32 siram_entry_id;
 134         u32 mask;
 135         int i;
 136
 137         si_regs = utdm->si_regs;
 138         siram = utdm->siram;
 139         ucc_num = ut_info->uf_info.ucc_num;
 140         tdm_port = utdm->tdm_port;
 141         siram_entry_id = utdm->siram_entry_id;
 142
 143         if (utdm->tdm_framer_type == TDM_FRAMER_T1)
 144                 utdm->num_of_ts = 24;
 145         if (utdm->tdm_framer_type == TDM_FRAMER_E1)
 146                 utdm->num_of_ts = 32;
 147
 148         /* set siram table */
 149         csel = (ucc_num < 4) ? ucc_num + 9 : ucc_num - 3;
 150
 151         siram_entry_valid = SIR_CSEL(csel) | SIR_BYTE | SIR_CNT(0);
 152         siram_entry_closed = SIR_IDLE | SIR_BYTE | SIR_CNT(0);
 153
 154         for (i = 0; i < utdm->num_of_ts; i++) {
 155                 mask = 0x01 << i;
 156
 157                 if (utdm->tx_ts_mask & mask)
 158                         iowrite16be(siram_entry_valid,
 159                                     &siram[siram_entry_id * 32 + i]);
 160                 else
 161                         iowrite16be(siram_entry_closed,
 162                                     &siram[siram_entry_id * 32 + i]);
 163
 164                 if (utdm->rx_ts_mask & mask)
 165                         iowrite16be(siram_entry_valid,
 166                                     &siram[siram_entry_id * 32 + 0x200 +  i]);
 167                 else
 168                         iowrite16be(siram_entry_closed,
 169                                     &siram[siram_entry_id * 32 + 0x200 +  i]);
 170         }
 171
 172         setbits16(&siram[(siram_entry_id * 32) + (utdm->num_of_ts - 1)],
 173                   SIR_LAST);
 174         setbits16(&siram[(siram_entry_id * 32) + 0x200 + (utdm->num_of_ts - 1)],
 175                   SIR_LAST);
 176
 177         /* Set SIxMR register */
 178         sixmr = SIMR_SAD(siram_entry_id);
 179
 180         sixmr &= ~SIMR_SDM_MASK;
 181
 182         if (utdm->tdm_mode == TDM_INTERNAL_LOOPBACK)
 183                 sixmr |= SIMR_SDM_INTERNAL_LOOPBACK;
 184         else
 185                 sixmr |= SIMR_SDM_NORMAL;
 186
 187         sixmr |= SIMR_RFSD(ut_info->si_info.simr_rfsd) |
 188                         SIMR_TFSD(ut_info->si_info.simr_tfsd);
 189
 190         if (ut_info->si_info.simr_crt)
 191                 sixmr |= SIMR_CRT;
 192         if (ut_info->si_info.simr_sl)
 193                 sixmr |= SIMR_SL;
 194         if (ut_info->si_info.simr_ce)
 195                 sixmr |= SIMR_CE;
 196         if (ut_info->si_info.simr_fe)
 197                 sixmr |= SIMR_FE;
 198         if (ut_info->si_info.simr_gm)
 199                 sixmr |= SIMR_GM;
 200
 201         switch (tdm_port) {
 202         case 0:
 203                 iowrite16be(sixmr, &si_regs->sixmr1[0]);
 204                 break;
 205         case 1:
 206                 iowrite16be(sixmr, &si_regs->sixmr1[1]);
 207                 break;
 208         case 2:
 209                 iowrite16be(sixmr, &si_regs->sixmr1[2]);
 210                 break;
 211         case 3:
 212                 iowrite16be(sixmr, &si_regs->sixmr1[3]);
 213                 break;
 214         default:
 215                 pr_err("QE-TDM: can not find tdm sixmr reg\n");
 216                 break;
 217         }
 218 }
 219 EXPORT_SYMBOL(ucc_tdm_init);