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i2c: i2c-qcom-geni: Simplify irq handler

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We don't need to use goto here, we can just collapse the if statement
and goto chain into multiple branches and then combine some duplicate
completion calls into one big if statement. Let's do it to clean up code
some more.

Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Alok Chauhan <alokc@codeaurora.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Stephen Boyd 2018-09-24 16:52:35 -07:00 committed by Wolfram Sang
parent ef8d1639f2
commit a676973e45
1 changed files with 30 additions and 42 deletions
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72
drivers/i2c/busses/i2c-qcom-geni.c
View file

@ -201,21 +201,23 @@ static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err)
static irqreturn_t geni_i2c_irq(int irq, void *dev)
{
struct geni_i2c_dev *gi2c = dev;
int j;
void __iomem *base = gi2c->se.base;
int j, p;
u32 m_stat;
u32 rx_st;
u32 dm_tx_st;
u32 dm_rx_st;
u32 dma;
u32 val;
struct i2c_msg *cur;
unsigned long flags;
spin_lock_irqsave(&gi2c->lock, flags);
m_stat = readl_relaxed(gi2c->se.base + SE_GENI_M_IRQ_STATUS);
rx_st = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFO_STATUS);
dm_tx_st = readl_relaxed(gi2c->se.base + SE_DMA_TX_IRQ_STAT);
dm_rx_st = readl_relaxed(gi2c->se.base + SE_DMA_RX_IRQ_STAT);
dma = readl_relaxed(gi2c->se.base + SE_GENI_DMA_MODE_EN);
m_stat = readl_relaxed(base + SE_GENI_M_IRQ_STATUS);
rx_st = readl_relaxed(base + SE_GENI_RX_FIFO_STATUS);
dm_tx_st = readl_relaxed(base + SE_DMA_TX_IRQ_STAT);
dm_rx_st = readl_relaxed(base + SE_DMA_RX_IRQ_STAT);
dma = readl_relaxed(base + SE_GENI_DMA_MODE_EN);
cur = gi2c->cur;
if (!cur ||
@ -238,26 +240,17 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
/* Disable the TX Watermark interrupt to stop TX */
if (!dma)
writel_relaxed(0, gi2c->se.base +
SE_GENI_TX_WATERMARK_REG);
goto irqret;
}
if (dma) {
writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
} else if (dma) {
dev_dbg(gi2c->se.dev, "i2c dma tx:0x%x, dma rx:0x%x\n",
dm_tx_st, dm_rx_st);
goto irqret;
}
if (cur->flags & I2C_M_RD &&
m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
} else if (cur->flags & I2C_M_RD &&
m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
u32 rxcnt = rx_st & RX_FIFO_WC_MSK;
for (j = 0; j < rxcnt; j++) {
u32 val;
int p = 0;
val = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFOn);
p = 0;
val = readl_relaxed(base + SE_GENI_RX_FIFOn);
while (gi2c->cur_rd < cur->len && p < sizeof(val)) {
cur->buf[gi2c->cur_rd++] = val & 0xff;
val >>= 8;
@ -270,44 +263,39 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
m_stat & M_TX_FIFO_WATERMARK_EN) {
for (j = 0; j < gi2c->tx_wm; j++) {
u32 temp;
u32 val = 0;
int p = 0;
val = 0;
p = 0;
while (gi2c->cur_wr < cur->len && p < sizeof(val)) {
temp = cur->buf[gi2c->cur_wr++];
val |= temp << (p * 8);
p++;
}
writel_relaxed(val, gi2c->se.base + SE_GENI_TX_FIFOn);
writel_relaxed(val, base + SE_GENI_TX_FIFOn);
/* TX Complete, Disable the TX Watermark interrupt */
if (gi2c->cur_wr == cur->len) {
writel_relaxed(0, gi2c->se.base +
SE_GENI_TX_WATERMARK_REG);
writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
break;
}
}
}
irqret:
if (m_stat)
writel_relaxed(m_stat, gi2c->se.base + SE_GENI_M_IRQ_CLEAR);
if (dma) {
if (dm_tx_st)
writel_relaxed(dm_tx_st, gi2c->se.base +
SE_DMA_TX_IRQ_CLR);
if (dm_rx_st)
writel_relaxed(dm_rx_st, gi2c->se.base +
SE_DMA_RX_IRQ_CLR);
}
if (m_stat)
writel_relaxed(m_stat, base + SE_GENI_M_IRQ_CLEAR);
if (dma && dm_tx_st)
writel_relaxed(dm_tx_st, base + SE_DMA_TX_IRQ_CLR);
if (dma && dm_rx_st)
writel_relaxed(dm_rx_st, base + SE_DMA_RX_IRQ_CLR);
/* if this is err with done-bit not set, handle that through timeout. */
if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN)
complete(&gi2c->done);
else if (dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE)
complete(&gi2c->done);
else if (dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN ||
dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE ||
dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
complete(&gi2c->done);
spin_unlock_irqrestore(&gi2c->lock, flags);
return IRQ_HANDLED;
}