diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2019-08-05 19:55:08 -0500 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-08-21 14:36:01 +0530 |
| commit | 9b5884a0c60b7194fd62d48f62f893f353f41eb4 (patch) | |
| tree | cc04a86a09e41bc00a4e9d23ce17f8459b96e9fc /drivers/soundwire/cadence_master.c | |
| parent | 18046335643de6d21327f5ae034c8fb8463f6715 (diff) | |
| download | lwn-9b5884a0c60b7194fd62d48f62f893f353f41eb4.tar.gz lwn-9b5884a0c60b7194fd62d48f62f893f353f41eb4.zip | |
soundwire: cadence_master: revisit interrupt settings
Adding missing interrupt masks (parity, etc) and missing checks.
Clarify which masks are for which usage.
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190806005522.22642-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/cadence_master.c')
| -rw-r--r-- | drivers/soundwire/cadence_master.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index dc2d7227a068..89974bbe64c7 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -75,9 +75,12 @@ #define CDNS_MCP_INT_DPINT BIT(11) #define CDNS_MCP_INT_CTRL_CLASH BIT(10) #define CDNS_MCP_INT_DATA_CLASH BIT(9) +#define CDNS_MCP_INT_PARITY BIT(8) #define CDNS_MCP_INT_CMD_ERR BIT(7) +#define CDNS_MCP_INT_RX_NE BIT(3) #define CDNS_MCP_INT_RX_WL BIT(2) #define CDNS_MCP_INT_TXE BIT(1) +#define CDNS_MCP_INT_TXF BIT(0) #define CDNS_MCP_INTSET 0x4C @@ -575,6 +578,11 @@ irqreturn_t sdw_cdns_irq(int irq, void *dev_id) } } + if (int_status & CDNS_MCP_INT_PARITY) { + /* Parity error detected by Master */ + dev_err_ratelimited(cdns->dev, "Parity error\n"); + } + if (int_status & CDNS_MCP_INT_CTRL_CLASH) { /* Slave is driving bit slot during control word */ dev_err_ratelimited(cdns->dev, "Bus clash for control word\n"); @@ -642,10 +650,23 @@ static int _cdns_enable_interrupt(struct sdw_cdns *cdns) cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, CDNS_MCP_SLAVE_INTMASK1_MASK); - mask = CDNS_MCP_INT_SLAVE_RSVD | CDNS_MCP_INT_SLAVE_ALERT | - CDNS_MCP_INT_SLAVE_ATTACH | CDNS_MCP_INT_SLAVE_NATTACH | - CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH | - CDNS_MCP_INT_RX_WL | CDNS_MCP_INT_IRQ | CDNS_MCP_INT_DPINT; + /* enable detection of all slave state changes */ + mask = CDNS_MCP_INT_SLAVE_MASK; + + /* enable detection of bus issues */ + mask |= CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH | + CDNS_MCP_INT_PARITY; + + /* no detection of port interrupts for now */ + + /* enable detection of RX fifo level */ + mask |= CDNS_MCP_INT_RX_WL; + + /* + * CDNS_MCP_INT_IRQ needs to be set otherwise all previous + * settings are irrelevant + */ + mask |= CDNS_MCP_INT_IRQ; cdns_writel(cdns, CDNS_MCP_INTMASK, mask); |