@@ -240,6 +240,11 @@ static inline void qmc_clrbits16(void *__iomem addr, u16 clr)
qmc_write16(addr, qmc_read16(addr) & ~clr);
}
+static inline void qmc_clrsetbits16(void *__iomem addr, u16 clr, u16 set)
+{
+ qmc_write16(addr, (qmc_read16(addr) & ~clr) | set);
+}
+
static inline void qmc_write32(void *__iomem addr, u32 val)
{
iowrite32be(val, addr);
@@ -562,6 +567,122 @@ static void qmc_chan_read_done(struct qmc_chan *chan)
spin_unlock_irqrestore(&chan->rx_lock, flags);
}
+static int qmc_chan_setup_tsa_64rxtx(struct qmc_chan *chan, const struct tsa_serial_info *info)
+{
+ unsigned int i;
+ u16 curr;
+ u16 val;
+
+ /*
+ * Use a common Tx/Rx 64 entries table.
+ * Tx and Rx related stuffs must be identical
+ */
+ if (chan->tx_ts_mask != chan->rx_ts_mask) {
+ dev_err(chan->qmc->dev, "chan %u uses different Rx and Tx TS\n", chan->id);
+ return -EINVAL;
+ }
+
+ val = QMC_TSA_VALID | QMC_TSA_MASK | QMC_TSA_CHANNEL(chan->id);
+
+ /* Check entries based on Rx stuff*/
+ for (i = 0; i < info->nb_rx_ts; i++) {
+ if (!(chan->rx_ts_mask & (((u64)1) << i)))
+ continue;
+
+ curr = qmc_read16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2));
+ if (curr & QMC_TSA_VALID && (curr & ~QMC_TSA_WRAP) != val) {
+ dev_err(chan->qmc->dev, "chan %u TxRx entry %d already used\n",
+ chan->id, i);
+ return -EBUSY;
+ }
+ }
+
+ /* Set entries based on Rx stuff*/
+ for (i = 0; i < info->nb_rx_ts; i++) {
+ if (!(chan->rx_ts_mask & (((u64)1) << i)))
+ continue;
+
+ qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2),
+ ~QMC_TSA_WRAP, val);
+ }
+
+ return 0;
+}
+
+static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_serial_info *info)
+{
+ unsigned int i;
+ u16 curr;
+ u16 val;
+
+ /* Use a Tx 32 entries table and a Rx 32 entries table */
+
+ val = QMC_TSA_VALID | QMC_TSA_MASK | QMC_TSA_CHANNEL(chan->id);
+
+ /* Check entries based on Rx stuff */
+ for (i = 0; i < info->nb_rx_ts; i++) {
+ if (!(chan->rx_ts_mask & (((u64)1) << i)))
+ continue;
+
+ curr = qmc_read16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2));
+ if (curr & QMC_TSA_VALID && (curr & ~QMC_TSA_WRAP) != val) {
+ dev_err(chan->qmc->dev, "chan %u Rx entry %d already used\n",
+ chan->id, i);
+ return -EBUSY;
+ }
+ }
+ /* Check entries based on Tx stuff */
+ for (i = 0; i < info->nb_tx_ts; i++) {
+ if (!(chan->tx_ts_mask & (((u64)1) << i)))
+ continue;
+
+ curr = qmc_read16(chan->qmc->scc_pram + QMC_GBL_TSATTX + (i * 2));
+ if (curr & QMC_TSA_VALID && (curr & ~QMC_TSA_WRAP) != val) {
+ dev_err(chan->qmc->dev, "chan %u Tx entry %d already used\n",
+ chan->id, i);
+ return -EBUSY;
+ }
+ }
+
+ /* Set entries based on Rx stuff */
+ for (i = 0; i < info->nb_rx_ts; i++) {
+ if (!(chan->rx_ts_mask & (((u64)1) << i)))
+ continue;
+
+ qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2),
+ ~QMC_TSA_WRAP, val);
+ }
+ /* Set entries based on Tx stuff */
+ for (i = 0; i < info->nb_tx_ts; i++) {
+ if (!(chan->tx_ts_mask & (((u64)1) << i)))
+ continue;
+
+ qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATTX + (i * 2),
+ ~QMC_TSA_WRAP, val);
+ }
+
+ return 0;
+}
+
+static int qmc_chan_setup_tsa(struct qmc_chan *chan)
+{
+ struct tsa_serial_info info;
+ int ret;
+
+ /* Retrieve info from the TSA related serial */
+ ret = tsa_serial_get_info(chan->qmc->tsa_serial, &info);
+ if (ret)
+ return ret;
+
+ /*
+ * Setup one common 64 entries table or two 32 entries (one for Tx
+ * and one for Tx) according to assigned TS numbers.
+ */
+ return ((info.nb_tx_ts > 32) || (info.nb_rx_ts > 32)) ?
+ qmc_chan_setup_tsa_64rxtx(chan, &info) :
+ qmc_chan_setup_tsa_32rx_32tx(chan, &info);
+}
+
static int qmc_chan_command(struct qmc_chan *chan, u8 qmc_opcode)
{
return cpm_command(chan->id << 2, (qmc_opcode << 4) | 0x0E);
@@ -921,7 +1042,6 @@ static int qmc_of_parse_chans(struct qmc *qmc, struct device_node *np)
static int qmc_init_tsa_64rxtx(struct qmc *qmc, const struct tsa_serial_info *info)
{
- struct qmc_chan *chan;
unsigned int i;
u16 val;
@@ -935,18 +1055,6 @@ static int qmc_init_tsa_64rxtx(struct qmc *qmc, const struct tsa_serial_info *in
for (i = 0; i < 64; i++)
qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), 0x0000);
- /* Set entries based on Rx stuff*/
- list_for_each_entry(chan, &qmc->chan_head, list) {
- for (i = 0; i < info->nb_rx_ts; i++) {
- if (!(chan->rx_ts_mask & (((u64)1) << i)))
- continue;
-
- val = QMC_TSA_VALID | QMC_TSA_MASK |
- QMC_TSA_CHANNEL(chan->id);
- qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), val);
- }
- }
-
/* Set Wrap bit on last entry */
qmc_setbits16(qmc->scc_pram + QMC_GBL_TSATRX + ((info->nb_rx_ts - 1) * 2),
QMC_TSA_WRAP);
@@ -963,7 +1071,6 @@ static int qmc_init_tsa_64rxtx(struct qmc *qmc, const struct tsa_serial_info *in
static int qmc_init_tsa_32rx_32tx(struct qmc *qmc, const struct tsa_serial_info *info)
{
- struct qmc_chan *chan;
unsigned int i;
u16 val;
@@ -978,28 +1085,6 @@ static int qmc_init_tsa_32rx_32tx(struct qmc *qmc, const struct tsa_serial_info
qmc_write16(qmc->scc_pram + QMC_GBL_TSATTX + (i * 2), 0x0000);
}
- /* Set entries based on Rx and Tx stuff*/
- list_for_each_entry(chan, &qmc->chan_head, list) {
- /* Rx part */
- for (i = 0; i < info->nb_rx_ts; i++) {
- if (!(chan->rx_ts_mask & (((u64)1) << i)))
- continue;
-
- val = QMC_TSA_VALID | QMC_TSA_MASK |
- QMC_TSA_CHANNEL(chan->id);
- qmc_write16(qmc->scc_pram + QMC_GBL_TSATRX + (i * 2), val);
- }
- /* Tx part */
- for (i = 0; i < info->nb_tx_ts; i++) {
- if (!(chan->tx_ts_mask & (((u64)1) << i)))
- continue;
-
- val = QMC_TSA_VALID | QMC_TSA_MASK |
- QMC_TSA_CHANNEL(chan->id);
- qmc_write16(qmc->scc_pram + QMC_GBL_TSATTX + (i * 2), val);
- }
- }
-
/* Set Wrap bit on last entries */
qmc_setbits16(qmc->scc_pram + QMC_GBL_TSATRX + ((info->nb_rx_ts - 1) * 2),
QMC_TSA_WRAP);
@@ -1081,6 +1166,10 @@ static int qmc_setup_chan(struct qmc *qmc, struct qmc_chan *chan)
chan->qmc = qmc;
+ ret = qmc_chan_setup_tsa(chan);
+ if (ret)
+ return ret;
+
/* Set channel specific parameter base address */
chan->s_param = qmc->dpram + (chan->id * 64);
/* 16 bd per channel (8 rx and 8 tx) */
Introduce the qmc_chan_setup_tsa* functions to setup entries related to the given channel. Use them during QMC channels setup. Signed-off-by: Herve Codina <herve.codina@bootlin.com> --- drivers/soc/fsl/qe/qmc.c | 161 ++++++++++++++++++++++++++++++--------- 1 file changed, 125 insertions(+), 36 deletions(-)