davinci: edma: use a more intuitive name for edma_info

'edma_info' structure inside the edma driver represents
a single instance of edma channel controller. Call it
'edma_cc' instead. This also avoids readers confusing
it with an instance of edma_soc_info structre which
carries the platform data for a single channel controller
instance.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 77 insertions, 81 deletions

diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c
index 0bf290befa23..b705089e2bef 100644
--- a/arch/arm/mach-davinci/dma.c
+++ b/arch/arm/mach-davinci/dma.c
@@ -243,7 +243,7 @@ struct edma {
         } intr_data[EDMA_MAX_DMACH];
 };
 
-static struct edma *edma_info[EDMA_MAX_CC];
+static struct edma *edma_cc[EDMA_MAX_CC];
 static int arch_num_cc;
 
 /* dummy param set used to (re)initialize parameter RAM slots */
@@ -261,7 +261,7 @@ static void map_dmach_queue(unsigned ctlr, unsigned ch_no,
 
         /* default to low priority queue */
         if (queue_no == EVENTQ_DEFAULT)
-                queue_no = edma_info[ctlr]->default_queue;
+                queue_no = edma_cc[ctlr]->default_queue;
 
         queue_no &= 7;
         edma_modify_array(ctlr, EDMA_DMAQNUM, (ch_no >> 3),
@@ -315,8 +315,8 @@ setup_dma_interrupt(unsigned lch,
                                 (1 << (lch & 0x1f)));
         }
 
-        edma_info[ctlr]->intr_data[lch].callback = callback;
-        edma_info[ctlr]->intr_data[lch].data = data;
+        edma_cc[ctlr]->intr_data[lch].callback = callback;
+        edma_cc[ctlr]->intr_data[lch].data = data;
 
         if (callback) {
                 edma_shadow0_write_array(ctlr, SH_ICR, lch >> 5,
@@ -328,11 +328,10 @@ setup_dma_interrupt(unsigned lch,
 
 static int irq2ctlr(int irq)
 {
-        if (irq >= edma_info[0]->irq_res_start &&
-                irq <= edma_info[0]->irq_res_end)
+        if (irq >= edma_cc[0]->irq_res_start && irq <= edma_cc[0]->irq_res_end)
                 return 0;
-        else if (irq >= edma_info[1]->irq_res_start &&
-                irq <= edma_info[1]->irq_res_end)
+        else if (irq >= edma_cc[1]->irq_res_start &&
+                irq <= edma_cc[1]->irq_res_end)
                 return 1;
 
         return -1;
@@ -377,10 +376,10 @@ static irqreturn_t dma_irq_handler(int irq, void *data)
                                 /* Clear the corresponding IPR bits */
                                 edma_shadow0_write_array(ctlr, SH_ICR, j,
                                                         (1 << i));
-                                if (edma_info[ctlr]->intr_data[k].callback) {
-                                        edma_info[ctlr]->intr_data[k].callback(
+                                if (edma_cc[ctlr]->intr_data[k].callback) {
+                                        edma_cc[ctlr]->intr_data[k].callback(
                                                 k, DMA_COMPLETE,
-                                                edma_info[ctlr]->intr_data[k].
+                                                edma_cc[ctlr]->intr_data[k].
                                                 data);
                                 }
                         }
@@ -433,12 +432,12 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
                                         /* Clear any SER */
                                         edma_shadow0_write_array(ctlr, SH_SECR,
                                                                 j, (1 << i));
-                                        if (edma_info[ctlr]->intr_data[k].
+                                        if (edma_cc[ctlr]->intr_data[k].
                                                                 callback) {
-                                                edma_info[ctlr]->intr_data[k].
+                                                edma_cc[ctlr]->intr_data[k].
                                                 callback(k,
                                                 DMA_CC_ERROR,
-                                                edma_info[ctlr]->intr_data
+                                                edma_cc[ctlr]->intr_data
                                                 [k].data);
                                         }
                                 }
@@ -514,9 +513,9 @@ static int reserve_contiguous_slots(int ctlr, unsigned int id,
         int stop_slot = start_slot;
         DECLARE_BITMAP(tmp_inuse, EDMA_MAX_PARAMENTRY);
 
-        for (i = start_slot; i < edma_info[ctlr]->num_slots; ++i) {
+        for (i = start_slot; i < edma_cc[ctlr]->num_slots; ++i) {
                 j = EDMA_CHAN_SLOT(i);
-                if (!test_and_set_bit(j, edma_info[ctlr]->edma_inuse)) {
+                if (!test_and_set_bit(j, edma_cc[ctlr]->edma_inuse)) {
                         /* Record our current beginning slot */
                         if (count == num_slots)
                                 stop_slot = i;
@@ -543,12 +542,12 @@ static int reserve_contiguous_slots(int ctlr, unsigned int id,
          * of contiguous parameter RAM slots but do not find the exact number
          * requested as we may reach the total number of parameter RAM slots
          */
-        if (i == edma_info[ctlr]->num_slots)
+        if (i == edma_cc[ctlr]->num_slots)
                 stop_slot = i;
 
         for (j = start_slot; j < stop_slot; j++)
                 if (test_bit(j, tmp_inuse))
-                        clear_bit(j, edma_info[ctlr]->edma_inuse);
+                        clear_bit(j, edma_cc[ctlr]->edma_inuse);
 
         if (count)
                 return -EBUSY;
@@ -570,7 +569,7 @@ static int prepare_unused_channel_list(struct device *dev, void *data)
                                 (int)pdev->resource[i].start >= 0) {
                         ctlr = EDMA_CTLR(pdev->resource[i].start);
                         clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start),
-                                        edma_info[ctlr]->edma_unused);
+                                        edma_cc[ctlr]->edma_unused);
                 }
         }
 
@@ -644,14 +643,13 @@ int edma_alloc_channel(int channel,
                 for (i = 0; i < arch_num_cc; i++) {
                         channel = 0;
                         for (;;) {
-                                channel = find_next_bit(edma_info[i]->
-                                                edma_unused,
-                                                edma_info[i]->num_channels,
+                                channel = find_next_bit(edma_cc[i]->edma_unused,
+                                                edma_cc[i]->num_channels,
                                                 channel);
-                                if (channel == edma_info[i]->num_channels)
+                                if (channel == edma_cc[i]->num_channels)
                                         break;
                                 if (!test_and_set_bit(channel,
-                                                edma_info[i]->edma_inuse)) {
+                                                edma_cc[i]->edma_inuse)) {
                                         done = 1;
                                         ctlr = i;
                                         break;
@@ -663,9 +661,9 @@ int edma_alloc_channel(int channel,
                 }
                 if (!done)
                         return -ENOMEM;
-        } else if (channel >= edma_info[ctlr]->num_channels) {
+        } else if (channel >= edma_cc[ctlr]->num_channels) {
                 return -EINVAL;
-        } else if (test_and_set_bit(channel, edma_info[ctlr]->edma_inuse)) {
+        } else if (test_and_set_bit(channel, edma_cc[ctlr]->edma_inuse)) {
                 return -EBUSY;
         }
 
@@ -706,7 +704,7 @@ void edma_free_channel(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel >= edma_info[ctlr]->num_channels)
+        if (channel >= edma_cc[ctlr]->num_channels)
                 return;
 
         setup_dma_interrupt(channel, NULL, NULL);
@@ -714,7 +712,7 @@ void edma_free_channel(unsigned channel)
 
         memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(channel),
                         &dummy_paramset, PARM_SIZE);
-        clear_bit(channel, edma_info[ctlr]->edma_inuse);
+        clear_bit(channel, edma_cc[ctlr]->edma_inuse);
 }
 EXPORT_SYMBOL(edma_free_channel);
 
@@ -738,20 +736,19 @@ int edma_alloc_slot(unsigned ctlr, int slot)
                 slot = EDMA_CHAN_SLOT(slot);
 
         if (slot < 0) {
-                slot = edma_info[ctlr]->num_channels;
+                slot = edma_cc[ctlr]->num_channels;
                 for (;;) {
-                        slot = find_next_zero_bit(edma_info[ctlr]->edma_inuse,
-                                        edma_info[ctlr]->num_slots, slot);
-                        if (slot == edma_info[ctlr]->num_slots)
+                        slot = find_next_zero_bit(edma_cc[ctlr]->edma_inuse,
+                                        edma_cc[ctlr]->num_slots, slot);
+                        if (slot == edma_cc[ctlr]->num_slots)
                                 return -ENOMEM;
-                        if (!test_and_set_bit(slot,
-                                                edma_info[ctlr]->edma_inuse))
+                        if (!test_and_set_bit(slot, edma_cc[ctlr]->edma_inuse))
                                 break;
                 }
-        } else if (slot < edma_info[ctlr]->num_channels ||
-                        slot >= edma_info[ctlr]->num_slots) {
+        } else if (slot < edma_cc[ctlr]->num_channels ||
+                        slot >= edma_cc[ctlr]->num_slots) {
                 return -EINVAL;
-        } else if (test_and_set_bit(slot, edma_info[ctlr]->edma_inuse)) {
+        } else if (test_and_set_bit(slot, edma_cc[ctlr]->edma_inuse)) {
                 return -EBUSY;
         }
 
@@ -777,13 +774,13 @@ void edma_free_slot(unsigned slot)
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_channels ||
-                slot >= edma_info[ctlr]->num_slots)
+        if (slot < edma_cc[ctlr]->num_channels ||
+                slot >= edma_cc[ctlr]->num_slots)
                 return;
 
         memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
                         &dummy_paramset, PARM_SIZE);
-        clear_bit(slot, edma_info[ctlr]->edma_inuse);
+        clear_bit(slot, edma_cc[ctlr]->edma_inuse);
 }
 EXPORT_SYMBOL(edma_free_slot);
 
@@ -821,8 +818,8 @@ int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count)
          * of slots
          */
         if ((id != EDMA_CONT_PARAMS_ANY) &&
-                (slot < edma_info[ctlr]->num_channels ||
-                slot >= edma_info[ctlr]->num_slots))
+                (slot < edma_cc[ctlr]->num_channels ||
+                slot >= edma_cc[ctlr]->num_slots))
                 return -EINVAL;
 
         /*
@@ -831,13 +828,13 @@ int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count)
          * channels
          */
         if (count < 1 || count >
-                (edma_info[ctlr]->num_slots - edma_info[ctlr]->num_channels))
+                (edma_cc[ctlr]->num_slots - edma_cc[ctlr]->num_channels))
                 return -EINVAL;
 
         switch (id) {
         case EDMA_CONT_PARAMS_ANY:
                 return reserve_contiguous_slots(ctlr, id, count,
-                                                 edma_info[ctlr]->num_channels);
+                                                 edma_cc[ctlr]->num_channels);
         case EDMA_CONT_PARAMS_FIXED_EXACT:
         case EDMA_CONT_PARAMS_FIXED_NOT_EXACT:
                 return reserve_contiguous_slots(ctlr, id, count, slot);
@@ -869,8 +866,8 @@ int edma_free_cont_slots(unsigned slot, int count)
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_channels ||
-                slot >= edma_info[ctlr]->num_slots ||
+        if (slot < edma_cc[ctlr]->num_channels ||
+                slot >= edma_cc[ctlr]->num_slots ||
                 count < 1)
                 return -EINVAL;
 
@@ -880,7 +877,7 @@ int edma_free_cont_slots(unsigned slot, int count)
 
                 memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot_to_free),
                         &dummy_paramset, PARM_SIZE);
-                clear_bit(slot_to_free, edma_info[ctlr]->edma_inuse);
+                clear_bit(slot_to_free, edma_cc[ctlr]->edma_inuse);
         }
 
         return 0;
@@ -910,7 +907,7 @@ void edma_set_src(unsigned slot, dma_addr_t src_port,
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_slots) {
+        if (slot < edma_cc[ctlr]->num_slots) {
                 unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot);
 
                 if (mode) {
@@ -948,7 +945,7 @@ void edma_set_dest(unsigned slot, dma_addr_t dest_port,
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_slots) {
+        if (slot < edma_cc[ctlr]->num_slots) {
                 unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot);
 
                 if (mode) {
@@ -1008,7 +1005,7 @@ void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx)
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_slots) {
+        if (slot < edma_cc[ctlr]->num_slots) {
                 edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot,
                                 0xffff0000, src_bidx);
                 edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot,
@@ -1034,7 +1031,7 @@ void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx)
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_slots) {
+        if (slot < edma_cc[ctlr]->num_slots) {
                 edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot,
                                 0x0000ffff, dest_bidx << 16);
                 edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot,
@@ -1081,7 +1078,7 @@ void edma_set_transfer_params(unsigned slot,
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot < edma_info[ctlr]->num_slots) {
+        if (slot < edma_cc[ctlr]->num_slots) {
                 edma_parm_modify(ctlr, PARM_LINK_BCNTRLD, slot,
                                 0x0000ffff, bcnt_rld << 16);
                 if (sync_mode == ASYNC)
@@ -1111,9 +1108,9 @@ void edma_link(unsigned from, unsigned to)
         ctlr_to = EDMA_CTLR(to);
         to = EDMA_CHAN_SLOT(to);
 
-        if (from >= edma_info[ctlr_from]->num_slots)
+        if (from >= edma_cc[ctlr_from]->num_slots)
                 return;
-        if (to >= edma_info[ctlr_to]->num_slots)
+        if (to >= edma_cc[ctlr_to]->num_slots)
                 return;
         edma_parm_modify(ctlr_from, PARM_LINK_BCNTRLD, from, 0xffff0000,
                                 PARM_OFFSET(to));
@@ -1134,7 +1131,7 @@ void edma_unlink(unsigned from)
         ctlr = EDMA_CTLR(from);
         from = EDMA_CHAN_SLOT(from);
 
-        if (from >= edma_info[ctlr]->num_slots)
+        if (from >= edma_cc[ctlr]->num_slots)
                 return;
         edma_parm_or(ctlr, PARM_LINK_BCNTRLD, from, 0xffff);
 }
@@ -1161,7 +1158,7 @@ void edma_write_slot(unsigned slot, const struct edmacc_param *param)
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot >= edma_info[ctlr]->num_slots)
+        if (slot >= edma_cc[ctlr]->num_slots)
                 return;
         memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot), param,
                         PARM_SIZE);
@@ -1183,7 +1180,7 @@ void edma_read_slot(unsigned slot, struct edmacc_param *param)
         ctlr = EDMA_CTLR(slot);
         slot = EDMA_CHAN_SLOT(slot);
 
-        if (slot >= edma_info[ctlr]->num_slots)
+        if (slot >= edma_cc[ctlr]->num_slots)
                 return;
         memcpy_fromio(param, edmacc_regs_base[ctlr] + PARM_OFFSET(slot),
                         PARM_SIZE);
@@ -1208,7 +1205,7 @@ void edma_pause(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel < edma_info[ctlr]->num_channels) {
+        if (channel < edma_cc[ctlr]->num_channels) {
                 unsigned int mask = (1 << (channel & 0x1f));
 
                 edma_shadow0_write_array(ctlr, SH_EECR, channel >> 5, mask);
@@ -1229,7 +1226,7 @@ void edma_resume(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel < edma_info[ctlr]->num_channels) {
+        if (channel < edma_cc[ctlr]->num_channels) {
                 unsigned int mask = (1 << (channel & 0x1f));
 
                 edma_shadow0_write_array(ctlr, SH_EESR, channel >> 5, mask);
@@ -1255,12 +1252,12 @@ int edma_start(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel < edma_info[ctlr]->num_channels) {
+        if (channel < edma_cc[ctlr]->num_channels) {
                 int j = channel >> 5;
                 unsigned int mask = (1 << (channel & 0x1f));
 
                 /* EDMA channels without event association */
-                if (test_bit(channel, edma_info[ctlr]->edma_unused)) {
+                if (test_bit(channel, edma_cc[ctlr]->edma_unused)) {
                         pr_debug("EDMA: ESR%d %08x\n", j,
                                 edma_shadow0_read_array(ctlr, SH_ESR, j));
                         edma_shadow0_write_array(ctlr, SH_ESR, j, mask);
@@ -1301,7 +1298,7 @@ void edma_stop(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel < edma_info[ctlr]->num_channels) {
+        if (channel < edma_cc[ctlr]->num_channels) {
                 int j = channel >> 5;
                 unsigned int mask = (1 << (channel & 0x1f));
 
@@ -1340,7 +1337,7 @@ void edma_clean_channel(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel < edma_info[ctlr]->num_channels) {
+        if (channel < edma_cc[ctlr]->num_channels) {
                 int j = (channel >> 5);
                 unsigned int mask = 1 << (channel & 0x1f);
 
@@ -1368,7 +1365,7 @@ void edma_clear_event(unsigned channel)
         ctlr = EDMA_CTLR(channel);
         channel = EDMA_CHAN_SLOT(channel);
 
-        if (channel >= edma_info[ctlr]->num_channels)
+        if (channel >= edma_cc[ctlr]->num_channels)
                 return;
         if (channel < 32)
                 edma_write(ctlr, EDMA_ECR, 1 << channel);
@@ -1423,38 +1420,37 @@ static int __init edma_probe(struct platform_device *pdev)
                         goto fail1;
                 }
 
-                edma_info[j] = kmalloc(sizeof(struct edma), GFP_KERNEL);
-                if (!edma_info[j]) {
+                edma_cc[j] = kmalloc(sizeof(struct edma), GFP_KERNEL);
+                if (!edma_cc[j]) {
                         status = -ENOMEM;
                         goto fail1;
                 }
-                memset(edma_info[j], 0, sizeof(struct edma));
+                memset(edma_cc[j], 0, sizeof(struct edma));
 
-                edma_info[j]->num_channels = min_t(unsigned, info[j].n_channel,
+                edma_cc[j]->num_channels = min_t(unsigned, info[j].n_channel,
                                                         EDMA_MAX_DMACH);
-                edma_info[j]->num_slots = min_t(unsigned, info[j].n_slot,
+                edma_cc[j]->num_slots = min_t(unsigned, info[j].n_slot,
                                                         EDMA_MAX_PARAMENTRY);
-                edma_info[j]->num_cc = min_t(unsigned, info[j].n_cc,
-                                                        EDMA_MAX_CC);
+                edma_cc[j]->num_cc = min_t(unsigned, info[j].n_cc, EDMA_MAX_CC);
 
-                edma_info[j]->default_queue = info[j].default_queue;
-                if (!edma_info[j]->default_queue)
-                        edma_info[j]->default_queue = EVENTQ_1;
+                edma_cc[j]->default_queue = info[j].default_queue;
+                if (!edma_cc[j]->default_queue)
+                        edma_cc[j]->default_queue = EVENTQ_1;
 
                 dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n",
                         edmacc_regs_base[j]);
 
-                for (i = 0; i < edma_info[j]->num_slots; i++)
+                for (i = 0; i < edma_cc[j]->num_slots; i++)
                         memcpy_toio(edmacc_regs_base[j] + PARM_OFFSET(i),
                                         &dummy_paramset, PARM_SIZE);
 
                 /* Mark all channels as unused */
-                memset(edma_info[j]->edma_unused, 0xff,
-                        sizeof(edma_info[j]->edma_unused));
+                memset(edma_cc[j]->edma_unused, 0xff,
+                        sizeof(edma_cc[j]->edma_unused));
 
                 sprintf(irq_name, "edma%d", j);
                 irq[j] = platform_get_irq_byname(pdev, irq_name);
-                edma_info[j]->irq_res_start = irq[j];
+                edma_cc[j]->irq_res_start = irq[j];
                 status = request_irq(irq[j], dma_irq_handler, 0, "edma",
                                         &pdev->dev);
                 if (status < 0) {
@@ -1465,7 +1461,7 @@ static int __init edma_probe(struct platform_device *pdev)
 
                 sprintf(irq_name, "edma%d_err", j);
                 err_irq[j] = platform_get_irq_byname(pdev, irq_name);
-                edma_info[j]->irq_res_end = err_irq[j];
+                edma_cc[j]->irq_res_end = err_irq[j];
                 status = request_irq(err_irq[j], dma_ccerr_handler, 0,
                                         "edma_error", &pdev->dev);
                 if (status < 0) {
@@ -1478,7 +1474,7 @@ static int __init edma_probe(struct platform_device *pdev)
                  * specified. This way, long transfers on the low priority queue
                  * started by the codec engine will not cause audio defects.
                  */
-                for (i = 0; i < edma_info[j]->num_channels; i++)
+                for (i = 0; i < edma_cc[j]->num_channels; i++)
                         map_dmach_queue(j, i, EVENTQ_1);
 
                 queue_tc_mapping = info[j].queue_tc_mapping;
@@ -1541,7 +1537,7 @@ fail1:
                         release_mem_region(r[i]->start, len[i]);
                 if (edmacc_regs_base[i])
                         iounmap(edmacc_regs_base[i]);
-                kfree(edma_info[i]);
+                kfree(edma_cc[i]);
         }
         return status;
 }