Add support for handling soundwire controller interrupts.
Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com Signed-off-by: Mastan Katragadda Mastan.Katragadda@amd.com --- drivers/soundwire/amd_master.c | 156 ++++++++++++++++++++++++++++++ drivers/soundwire/amd_master.h | 1 + include/linux/soundwire/sdw_amd.h | 3 + 3 files changed, 160 insertions(+)
diff --git a/drivers/soundwire/amd_master.c b/drivers/soundwire/amd_master.c index 93bffe6ff9e2..c7063b8bdd7b 100644 --- a/drivers/soundwire/amd_master.c +++ b/drivers/soundwire/amd_master.c @@ -557,6 +557,47 @@ amd_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num) return amd_program_scp_addr(ctrl, &msg); }
+static void amd_sdwc_process_ping_status(u64 response, struct amd_sdwc_ctrl *ctrl) +{ + u64 slave_stat = 0; + u32 val = 0; + u16 dev_index; + + /* slave status from ping response*/ + slave_stat = FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_0_3, response); + slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_4_11, response) << 8; + + dev_dbg(ctrl->dev, "%s: slave_stat:0x%llx\n", __func__, slave_stat); + for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) { + val = (slave_stat >> (dev_index * 2)) & AMD_SDW_MCP_SLAVE_STATUS_MASK; + dev_dbg(ctrl->dev, "%s val:0x%x\n", __func__, val); + switch (val) { + case SDW_SLAVE_ATTACHED: + ctrl->status[dev_index] = SDW_SLAVE_ATTACHED; + break; + case SDW_SLAVE_UNATTACHED: + ctrl->status[dev_index] = SDW_SLAVE_UNATTACHED; + break; + case SDW_SLAVE_ALERT: + ctrl->status[dev_index] = SDW_SLAVE_ALERT; + break; + default: + ctrl->status[dev_index] = SDW_SLAVE_RESERVED; + break; + } + } +} + +static void amd_sdwc_read_and_process_ping_status(struct amd_sdwc_ctrl *ctrl) +{ + u64 response = 0; + + mutex_lock(&ctrl->bus.msg_lock); + response = amd_sdwc_send_cmd_get_resp(ctrl, 0, 0); + mutex_unlock(&ctrl->bus.msg_lock); + amd_sdwc_process_ping_status(response, ctrl); +} + static u32 amd_sdwc_read_ping_status(struct sdw_bus *bus) { struct amd_sdwc_ctrl *ctrl = to_amd_sdw(bus); @@ -1132,6 +1173,119 @@ static int amd_sdwc_register_dais(struct amd_sdwc_ctrl *ctrl) dais, num_dais); }
+static void amd_sdwc_update_slave_status_work(struct work_struct *work) +{ + struct amd_sdwc_ctrl *ctrl = + container_of(work, struct amd_sdwc_ctrl, amd_sdw_work); + u32 sw_status_change_mask_0to7_reg; + u32 sw_status_change_mask_8to11_reg; + + switch (ctrl->instance) { + case ACP_SDW0: + sw_status_change_mask_0to7_reg = SW_STATE_CHANGE_STATUS_MASK_0TO7; + sw_status_change_mask_8to11_reg = SW_STATE_CHANGE_STATUS_MASK_8TO11; + break; + case ACP_SDW1: + sw_status_change_mask_0to7_reg = P1_SW_STATE_CHANGE_STATUS_MASK_0TO7; + sw_status_change_mask_8to11_reg = P1_SW_STATE_CHANGE_STATUS_MASK_8TO11; + break; + default: + dev_err(ctrl->dev, "Invalid Soundwire controller instance\n"); + return; + } + + if (ctrl->status[0] == SDW_SLAVE_ATTACHED) { + acp_reg_writel(0, ctrl->mmio + sw_status_change_mask_0to7_reg); + acp_reg_writel(0, ctrl->mmio + sw_status_change_mask_8to11_reg); + } + +update_status: + sdw_handle_slave_status(&ctrl->bus, ctrl->status); + if (ctrl->status[0] == SDW_SLAVE_ATTACHED) { + acp_reg_writel(AMD_SDW_IRQ_MASK_0TO7, ctrl->mmio + sw_status_change_mask_0to7_reg); + acp_reg_writel(AMD_SDW_IRQ_MASK_8TO11, + ctrl->mmio + sw_status_change_mask_8to11_reg); + amd_sdwc_read_and_process_ping_status(ctrl); + goto update_status; + } +} + +static void amd_sdwc_update_slave_status(u32 status_change_0to7, u32 status_change_8to11, + struct amd_sdwc_ctrl *ctrl) +{ + u64 slave_stat = 0; + u32 val = 0; + int dev_index; + + if (status_change_0to7 == AMD_SDW_SLAVE_0_ATTACHED) + memset(ctrl->status, 0, sizeof(ctrl->status)); + slave_stat = status_change_0to7; + slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STATUS_8TO_11, status_change_8to11) << 32; + dev_dbg(ctrl->dev, "%s: status_change_0to7:0x%x status_change_8to11:0x%x\n", + __func__, status_change_0to7, status_change_8to11); + if (slave_stat) { + for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) { + if (slave_stat & AMD_SDW_MCP_SLAVE_STATUS_VALID_MASK(dev_index)) { + val = (slave_stat >> AMD_SDW_MCP_SLAVE_STAT_SHIFT_MASK(dev_index)) & + AMD_SDW_MCP_SLAVE_STATUS_MASK; + switch (val) { + case SDW_SLAVE_ATTACHED: + ctrl->status[dev_index] = SDW_SLAVE_ATTACHED; + break; + case SDW_SLAVE_UNATTACHED: + ctrl->status[dev_index] = SDW_SLAVE_UNATTACHED; + break; + case SDW_SLAVE_ALERT: + ctrl->status[dev_index] = SDW_SLAVE_ALERT; + break; + default: + ctrl->status[dev_index] = SDW_SLAVE_RESERVED; + break; + } + } + } + } +} + +static void amd_sdwc_irq_thread(struct work_struct *work) +{ + struct amd_sdwc_ctrl *ctrl = + container_of(work, struct amd_sdwc_ctrl, amd_sdw_irq_thread); + u32 sw_status_change_0to7_reg; + u32 sw_status_change_8to11_reg; + u32 status_change_8to11; + u32 status_change_0to7; + + switch (ctrl->instance) { + case ACP_SDW0: + sw_status_change_0to7_reg = SW_STATE_CHANGE_STATUS_0TO7; + sw_status_change_8to11_reg = SW_STATE_CHANGE_STATUS_8TO11; + break; + case ACP_SDW1: + sw_status_change_0to7_reg = P1_SW_STATE_CHANGE_STATUS_0TO7; + sw_status_change_8to11_reg = P1_SW_STATE_CHANGE_STATUS_8TO11; + break; + default: + dev_err(ctrl->dev, "Invalid Soundwire controller instance\n"); + return; + } + + status_change_8to11 = acp_reg_readl(ctrl->mmio + sw_status_change_8to11_reg); + status_change_0to7 = acp_reg_readl(ctrl->mmio + sw_status_change_0to7_reg); + dev_dbg(ctrl->dev, "%s [SDW%d] SDW INT: 0to7=0x%x, 8to11=0x%x\n", + __func__, ctrl->instance, status_change_0to7, status_change_8to11); + if (status_change_8to11 & AMD_SDW_PREQ_INTR_STAT) { + amd_sdwc_read_and_process_ping_status(ctrl); + } else { + /* Check for the updated status on Slave device */ + amd_sdwc_update_slave_status(status_change_0to7, status_change_8to11, ctrl); + } + if (status_change_8to11 || status_change_0to7) + schedule_work(&ctrl->amd_sdw_work); + acp_reg_writel(0x00, ctrl->mmio + sw_status_change_8to11_reg); + acp_reg_writel(0x00, ctrl->mmio + sw_status_change_0to7_reg); +} + static void amd_sdwc_probe_work(struct work_struct *work) { struct amd_sdwc_ctrl *ctrl = container_of(work, struct amd_sdwc_ctrl, probe_work); @@ -1229,6 +1383,8 @@ static int amd_sdwc_probe(struct platform_device *pdev) sdw_bus_master_delete(&ctrl->bus); return ret; } + INIT_WORK(&ctrl->amd_sdw_irq_thread, amd_sdwc_irq_thread); + INIT_WORK(&ctrl->amd_sdw_work, amd_sdwc_update_slave_status_work); INIT_WORK(&ctrl->probe_work, amd_sdwc_probe_work); schedule_work(&ctrl->probe_work); return 0; diff --git a/drivers/soundwire/amd_master.h b/drivers/soundwire/amd_master.h index 42f32ca0c7a8..b43a5d6496cb 100644 --- a/drivers/soundwire/amd_master.h +++ b/drivers/soundwire/amd_master.h @@ -236,6 +236,7 @@ #define AMD_SDW1_PAD_KEEPER_EN_MASK 0x10 #define AMD_SDW0_PAD_KEEPER_DISABLE_MASK 0x1E #define AMD_SDW1_PAD_KEEPER_DISABLE_MASK 0xF +#define AMD_SDW_PREQ_INTR_STAT BIT(19)
enum amd_sdw_channel { /* SDW0 */ diff --git a/include/linux/soundwire/sdw_amd.h b/include/linux/soundwire/sdw_amd.h index 7a99d782969f..2db03b2f0c3b 100644 --- a/include/linux/soundwire/sdw_amd.h +++ b/include/linux/soundwire/sdw_amd.h @@ -24,9 +24,12 @@ struct amd_sdwc_ctrl { struct sdw_bus bus; struct device *dev; void __iomem *mmio; + struct work_struct amd_sdw_irq_thread; + struct work_struct amd_sdw_work; struct work_struct probe_work; struct mutex *sdw_lock; struct sdw_stream_runtime *sruntime[AMD_SDW_MAX_DAIS]; + enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; int num_din_ports; int num_dout_ports; int cols_index;