On 01/02/2021 14:31, Vinod Koul wrote:
On 29-01-21, 17:32, Srinivas Kandagatla wrote:
Add support to new interrupts and update irq routine in a way
to deal with multiple pending interrupts with in a single interrupt!
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/soundwire/qcom.c | 191 ++++++++++++++++++++++++++++++---------
1 file changed, 146 insertions(+), 45 deletions(-)
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index d61b204dc284..c699bd51d29a 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -28,10 +28,21 @@
#define SWRM_COMP_PARAMS_DIN_PORTS_MASK GENMASK(9, 5)
#define SWRM_INTERRUPT_STATUS 0x200
#define SWRM_INTERRUPT_STATUS_RMSK GENMASK(16, 0)
+#define SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ BIT(0)
#define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED BIT(1)
#define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS BIT(2)
+#define SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET BIT(3)
+#define SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW BIT(4)
+#define SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW BIT(5)
+#define SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW BIT(6)
#define SWRM_INTERRUPT_STATUS_CMD_ERROR BIT(7)
+#define SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION BIT(8)
+#define SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH BIT(9)
#define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED BIT(10)
+#define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2 BIT(13)
+#define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2 BIT(14)
+#define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP BIT(16)
+#define SWRM_INTERRUPT_MAX 17
#define SWRM_INTERRUPT_MASK_ADDR 0x204
#define SWRM_INTERRUPT_CLEAR 0x208
#define SWRM_INTERRUPT_CPU_EN 0x210
@@ -105,11 +116,8 @@ struct qcom_swrm_ctrl {
struct device *dev;
struct regmap *regmap;
void __iomem *mmio;
- struct completion *comp;
struct completion broadcast;
struct work_struct slave_work;
- /* read/write lock */
- spinlock_t comp_lock;
/* Port alloc/free lock */
struct mutex port_lock;
struct mutex io_lock;
@@ -126,6 +134,7 @@ struct qcom_swrm_ctrl {
int rows_index;
unsigned long dout_port_mask;
unsigned long din_port_mask;
+ u32 intr_mask;
u8 rcmd_id;
u8 wcmd_id;
struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS];
@@ -315,6 +324,27 @@ static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *swrm,
return ret;
}
+static int qcom_swrm_get_alert_slave(struct qcom_swrm_ctrl *ctrl)
+{
+ u32 val;
+ int i;
+
+ ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
+
+ for (i = 0; i < SDW_MAX_DEVICES; i++) {
+ u32 s;
define at top of the function pls, also maybe better name status?
Sure,
+
+ s = (val >> (i * 2));
why * 2 ? Maybe add a comment for this logic
This is status mask of 2 bits! Will clarify this in next version!
+
+ if ((s & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) {
+ ctrl->status[i] = s;
+ return i;
+ }
+ }
+
+ return -EINVAL;
+}
+
static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl)
{
u32 val;
@@ -333,40 +363,122 @@ static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl)
static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
{
- struct qcom_swrm_ctrl *ctrl = dev_id;
- u32 sts, value;
- unsigned long flags;
-
- ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
-
- if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
- ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
- dev_err_ratelimited(ctrl->dev,
- "CMD error, fifo status 0x%x\n",
- value);
- ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
- }
+ struct qcom_swrm_ctrl *swrm = dev_id;
+ u32 value, intr_sts, intr_sts_masked;
+ u32 i;
+ u8 devnum = 0;
+ int ret = IRQ_HANDLED;
+
+
+ swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts);
+ intr_sts_masked = intr_sts & swrm->intr_mask;
+
+handle_irq:
maybe move this into a fn and avoid a goto for non err path?
Makes sense!
--srini
