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i2c: i2c-qcom-geni: Simplify irq handler
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>
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ef8d1639f2
commit
a676973e45
1 changed files with 30 additions and 42 deletions
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@ -201,21 +201,23 @@ static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err)
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static irqreturn_t geni_i2c_irq(int irq, void *dev)
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{
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struct geni_i2c_dev *gi2c = dev;
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int j;
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void __iomem *base = gi2c->se.base;
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int j, p;
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u32 m_stat;
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u32 rx_st;
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u32 dm_tx_st;
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u32 dm_rx_st;
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u32 dma;
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u32 val;
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struct i2c_msg *cur;
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unsigned long flags;
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spin_lock_irqsave(&gi2c->lock, flags);
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m_stat = readl_relaxed(gi2c->se.base + SE_GENI_M_IRQ_STATUS);
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rx_st = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFO_STATUS);
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dm_tx_st = readl_relaxed(gi2c->se.base + SE_DMA_TX_IRQ_STAT);
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dm_rx_st = readl_relaxed(gi2c->se.base + SE_DMA_RX_IRQ_STAT);
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dma = readl_relaxed(gi2c->se.base + SE_GENI_DMA_MODE_EN);
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m_stat = readl_relaxed(base + SE_GENI_M_IRQ_STATUS);
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rx_st = readl_relaxed(base + SE_GENI_RX_FIFO_STATUS);
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dm_tx_st = readl_relaxed(base + SE_DMA_TX_IRQ_STAT);
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dm_rx_st = readl_relaxed(base + SE_DMA_RX_IRQ_STAT);
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dma = readl_relaxed(base + SE_GENI_DMA_MODE_EN);
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cur = gi2c->cur;
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if (!cur ||
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@ -238,26 +240,17 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
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/* Disable the TX Watermark interrupt to stop TX */
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if (!dma)
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writel_relaxed(0, gi2c->se.base +
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SE_GENI_TX_WATERMARK_REG);
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goto irqret;
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}
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if (dma) {
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writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
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} else if (dma) {
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dev_dbg(gi2c->se.dev, "i2c dma tx:0x%x, dma rx:0x%x\n",
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dm_tx_st, dm_rx_st);
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goto irqret;
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}
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if (cur->flags & I2C_M_RD &&
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m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
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} else if (cur->flags & I2C_M_RD &&
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m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
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u32 rxcnt = rx_st & RX_FIFO_WC_MSK;
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for (j = 0; j < rxcnt; j++) {
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u32 val;
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int p = 0;
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val = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFOn);
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p = 0;
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val = readl_relaxed(base + SE_GENI_RX_FIFOn);
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while (gi2c->cur_rd < cur->len && p < sizeof(val)) {
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cur->buf[gi2c->cur_rd++] = val & 0xff;
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val >>= 8;
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@ -270,44 +263,39 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
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m_stat & M_TX_FIFO_WATERMARK_EN) {
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for (j = 0; j < gi2c->tx_wm; j++) {
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u32 temp;
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u32 val = 0;
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int p = 0;
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val = 0;
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p = 0;
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while (gi2c->cur_wr < cur->len && p < sizeof(val)) {
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temp = cur->buf[gi2c->cur_wr++];
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val |= temp << (p * 8);
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p++;
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}
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writel_relaxed(val, gi2c->se.base + SE_GENI_TX_FIFOn);
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writel_relaxed(val, base + SE_GENI_TX_FIFOn);
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/* TX Complete, Disable the TX Watermark interrupt */
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if (gi2c->cur_wr == cur->len) {
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writel_relaxed(0, gi2c->se.base +
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SE_GENI_TX_WATERMARK_REG);
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writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
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break;
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}
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}
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}
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irqret:
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if (m_stat)
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writel_relaxed(m_stat, gi2c->se.base + SE_GENI_M_IRQ_CLEAR);
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if (dma) {
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if (dm_tx_st)
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writel_relaxed(dm_tx_st, gi2c->se.base +
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SE_DMA_TX_IRQ_CLR);
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if (dm_rx_st)
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writel_relaxed(dm_rx_st, gi2c->se.base +
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SE_DMA_RX_IRQ_CLR);
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}
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if (m_stat)
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writel_relaxed(m_stat, base + SE_GENI_M_IRQ_CLEAR);
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if (dma && dm_tx_st)
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writel_relaxed(dm_tx_st, base + SE_DMA_TX_IRQ_CLR);
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if (dma && dm_rx_st)
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writel_relaxed(dm_rx_st, base + SE_DMA_RX_IRQ_CLR);
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/* if this is err with done-bit not set, handle that through timeout. */
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if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN)
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complete(&gi2c->done);
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else if (dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE)
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complete(&gi2c->done);
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else if (dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
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if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN ||
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dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE ||
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dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
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complete(&gi2c->done);
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spin_unlock_irqrestore(&gi2c->lock, flags);
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return IRQ_HANDLED;
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}
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