Drop unneeded std_session_send_df_header() comments.

[libsigrok.git] / src / hardware / sysclk-lwla / lwla1034.c

diff --git a/src/hardware/sysclk-lwla/lwla1034.c b/src/hardware/sysclk-lwla/lwla1034.c
index d64641ea9d06b5106312da580a3fc3ca4d5fe293..14692c38c618a58bac0f08b779cee3c2d5a93557 100644 (file)
--- a/src/hardware/sysclk-lwla/lwla1034.c
+++ b/src/hardware/sysclk-lwla/lwla1034.c
@@ -208,9 +208,7 @@ static void read_response(struct acquisition_state *acq)
        uint64_t sample, high_nibbles, word;
        uint32_t *slice;
        uint8_t *out_p;
-       unsigned int words_left;
-       unsigned int max_samples, run_samples;
-       unsigned int wi, ri, si;
+       unsigned int words_left, max_samples, run_samples, wi, ri, si;
 
        /* Number of 36-bit words remaining in the transfer buffer. */
        words_left = MIN(acq->mem_addr_next, acq->mem_addr_stop)
@@ -239,13 +237,13 @@ static void read_response(struct acquisition_state *acq)
                acq->samples_done += run_samples;
 
                if (run_samples == max_samples)
-                       break; /* packet full or sample limit reached */
+                       break; /* Packet full or sample limit reached. */
                if (wi >= words_left)
-                       break; /* done with current transfer */
+                       break; /* Done with current transfer. */
 
                /* Get the current slice of 8 packed 36-bit words. */
                slice = &acq->xfer_buf_in[(acq->in_index + wi) / 8 * 9];
-               si = (acq->in_index + wi) % 8; /* word index within slice */
+               si = (acq->in_index + wi) % 8; /* Word index within slice. */
 
                /* Extract the next 36-bit word. */
                high_nibbles = LWLA_TO_UINT32(slice[8]);
@@ -262,6 +260,7 @@ static void read_response(struct acquisition_state *acq)
                        acq->rle = RLE_STATE_DATA;
                }
        }
+
        acq->in_index += wi;
        acq->mem_addr_done += wi;
 }
@@ -279,11 +278,9 @@ static int detect_short_transfer_quirk(const struct sr_dev_inst *sdi)
 {
        struct dev_context *devc;
        struct sr_usb_dev_inst *usb;
-       int xfer_len;
-       int ret;
+       int xfer_len, ret;
        uint16_t command[3];
        unsigned char buf[512];
-
        const int lreg_count = 10;
 
        devc = sdi->priv;
@@ -326,8 +323,7 @@ static int apply_fpga_config(const struct sr_dev_inst *sdi)
 {
        struct dev_context *devc;
        struct drv_context *drvc;
-       int config;
-       int ret;
+       int config, ret;
 
        devc = sdi->priv;
        drvc = sdi->driver->context;
@@ -342,7 +338,7 @@ static int apply_fpga_config(const struct sr_dev_inst *sdi)
                config = FPGA_EXTNEG;
 
        if (config == devc->active_fpga_config)
-               return SR_OK; /* no change */
+               return SR_OK; /* No change. */
 
        ret = lwla_send_bitstream(drvc->sr_ctx, sdi->conn,
                                  bitstream_map[config]);
@@ -377,8 +373,16 @@ static int device_init_check(const struct sr_dev_inst *sdi)
  */
 static int setup_acquisition(const struct sr_dev_inst *sdi)
 {
-       uint64_t divider_count;
-       uint64_t trigger_mask;
+       static const struct regval capture_init[] = {
+               {REG_MEM_CTRL,    MEM_CTRL_CLR_IDX},
+               {REG_MEM_CTRL,    MEM_CTRL_WRITE},
+               {REG_LONG_ADDR,   LREG_CAP_CTRL},
+               {REG_LONG_LOW,    CAP_CTRL_CLR_TIMEBASE | CAP_CTRL_FLUSH_FIFO |
+                                 CAP_CTRL_CLR_FIFOFULL | CAP_CTRL_CLR_COUNTER},
+               {REG_LONG_HIGH,   0},
+               {REG_LONG_STROBE, 0},
+       };
+       uint64_t divider_count, trigger_mask;
        struct dev_context *devc;
        struct sr_usb_dev_inst *usb;
        struct acquisition_state *acq;
@@ -388,21 +392,11 @@ static int setup_acquisition(const struct sr_dev_inst *sdi)
        usb  = sdi->conn;
        acq  = devc->acquisition;
 
-       acq->reg_seq_pos = 0;
-       acq->reg_seq_len = 0;
-
-       lwla_queue_regval(acq, REG_MEM_CTRL, MEM_CTRL_CLR_IDX);
-       lwla_queue_regval(acq, REG_MEM_CTRL, MEM_CTRL_WRITE);
-
-       queue_long_regval(acq, LREG_CAP_CTRL,
-               CAP_CTRL_CLR_TIMEBASE | CAP_CTRL_FLUSH_FIFO |
-               CAP_CTRL_CLR_FIFOFULL | CAP_CTRL_CLR_COUNTER);
-
-       lwla_queue_regval(acq, REG_CLK_BOOST, acq->clock_boost);
-
-       ret = lwla_write_regs(usb, acq->reg_sequence, acq->reg_seq_len);
-       acq->reg_seq_len = 0;
+       ret = lwla_write_regs(usb, capture_init, ARRAY_SIZE(capture_init));
+       if (ret != SR_OK)
+               return ret;
 
+       ret = lwla_write_reg(usb, REG_CLK_BOOST, acq->clock_boost);
        if (ret != SR_OK)
                return ret;