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Message-Id: <1366279934-30761-6-git-send-email-lee.jones@linaro.org>
Date: Thu, 18 Apr 2013 11:11:47 +0100
From: Lee Jones <lee.jones@...aro.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: arnd@...db.de, linus.walleij@...ricsson.com,
Lee Jones <lee.jones@...aro.org>,
Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
Per Forlin <per.forlin@...ricsson.com>,
Rabin Vincent <rabin@....in>
Subject: [PATCH 05/32] dmaengine: ste_dma40: Supply macros to resolve 'src' and 'dst' directions
There are lots of lengthy if() statements located sporadically up and
down the driver. This simple macro should make many of them a little
simpler to decipher. The remainder have to stay in place, as they
detail slightly more specific settings.
Cc: Vinod Koul <vinod.koul@...el.com>
Cc: Dan Williams <djbw@...com>
Cc: Per Forlin <per.forlin@...ricsson.com>
Cc: Rabin Vincent <rabin@....in>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
drivers/dma/ste_dma40.c | 38 ++++++++++++++++++++------------------
1 file changed, 20 insertions(+), 18 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index e50354d..b21a8a3 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -55,6 +55,10 @@
#define MAX(a, b) (((a) < (b)) ? (b) : (a))
+#define D40_IS_SRC(dir) ((dir == STEDMA40_PERIPH_TO_MEM) ? true : false)
+#define D40_IS_DST(dir) (((dir == STEDMA40_MEM_TO_PERIPH) || \
+ (dir == STEDMA40_MEM_TO_MEM)) ? true : false)
+
/* Reserved event lines for memcpy only. */
static int dma40_memcpy_channels[] = { 56, 57, 58, 59, 60 };
@@ -823,7 +827,7 @@ static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc)
* that uses linked lists.
*/
if (!(chan->phy_chan->use_soft_lli &&
- chan->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM))
+ D40_IS_SRC(chan->dma_cfg.dir)))
curr_lcla = d40_lcla_alloc_one(chan, desc);
first_lcla = curr_lcla;
@@ -1291,12 +1295,12 @@ static void d40_config_set_event(struct d40_chan *d40c,
u32 event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dev_type);
/* Enable event line connected to device (or memcpy) */
- if ((d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) ||
+ if (D40_IS_SRC(d40c->dma_cfg.dir) ||
(d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_PERIPH))
__d40_config_set_event(d40c, event_type, event,
D40_CHAN_REG_SSLNK);
- if (d40c->dma_cfg.dir != STEDMA40_PERIPH_TO_MEM)
+ if (!D40_IS_SRC(d40c->dma_cfg.dir))
__d40_config_set_event(d40c, event_type, event,
D40_CHAN_REG_SDLNK);
}
@@ -1762,7 +1766,7 @@ static int d40_validate_conf(struct d40_chan *d40c,
res = -EINVAL;
}
- if (conf->dir == STEDMA40_PERIPH_TO_MEM &&
+ if (D40_IS_SRC(conf->dir) &&
d40c->base->plat_data->dev_rx[conf->dev_type] == 0 &&
d40c->runtime_addr == 0) {
chan_err(d40c, "Invalid RX channel address (%d)\n",
@@ -1895,17 +1899,17 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user)
int j;
int log_num;
int num_phy_chans;
+ int dir = d40c->dma_cfg.dir;
bool is_src;
bool is_log = d40c->dma_cfg.mode == STEDMA40_MODE_LOGICAL;
phys = d40c->base->phy_res;
num_phy_chans = d40c->base->num_phy_chans;
- if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) {
+ if (D40_IS_SRC(dir)) {
log_num = 2 * dev_type;
is_src = true;
- } else if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH ||
- d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) {
+ } else if (D40_IS_DST(dir)) {
/* dst event lines are used for logical memcpy */
log_num = 2 * dev_type + 1;
is_src = false;
@@ -1916,7 +1920,7 @@ static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user)
event_line = D40_TYPE_TO_EVENT(dev_type);
if (!is_log) {
- if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) {
+ if (dir == STEDMA40_MEM_TO_MEM) {
/* Find physical half channel */
if (d40c->dma_cfg.use_fixed_channel) {
i = d40c->dma_cfg.phy_channel;
@@ -2053,11 +2057,10 @@ static int d40_free_dma(struct d40_chan *d40c)
return -EINVAL;
}
- if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH ||
- d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM)
- is_src = false;
- else if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM)
+ if (D40_IS_SRC(d40c->dma_cfg.dir))
is_src = true;
+ else if (D40_IS_DST(d40c->dma_cfg.dir))
+ is_src = false;
else {
chan_err(d40c, "Unknown direction\n");
return -EINVAL;
@@ -2118,12 +2121,11 @@ static bool d40_is_paused(struct d40_chan *d40c)
goto _exit;
}
- if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH ||
- d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) {
- status = readl(chanbase + D40_CHAN_REG_SDLNK);
- } else if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) {
+ if (D40_IS_SRC(d40c->dma_cfg.dir))
status = readl(chanbase + D40_CHAN_REG_SSLNK);
- } else {
+ else if (D40_IS_DST(d40c->dma_cfg.dir))
+ status = readl(chanbase + D40_CHAN_REG_SDLNK);
+ else {
chan_err(d40c, "Unknown direction\n");
goto _exit;
}
@@ -2394,7 +2396,7 @@ static void d40_set_prio_realtime(struct d40_chan *d40c)
if (d40c->base->rev < 3)
return;
- if ((d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) ||
+ if (D40_IS_SRC(d40c->dma_cfg.dir) ||
(d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_PERIPH))
__d40_set_prio_rt(d40c, d40c->dma_cfg.dev_type, true);
--
1.7.10.4
--
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