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authorSanyog Kale <sanyog.r.kale@intel.com>2018-04-26 16:08:28 +0300
committerVinod Koul <vkoul@kernel.org>2018-05-11 19:17:05 +0300
commit99b8a5d608a64254f22483f6b67a98f26d3eac8c (patch)
tree6624e9ebe342abdf42cac6ecca040b4ccf2c15ba /include/linux/soundwire
parent79df15b7d37c80aee5dff361841500c79e62b1e0 (diff)
downloadlinux-99b8a5d608a64254f22483f6b67a98f26d3eac8c.tar.xz
soundwire: Add bank switch routine
SoundWire supports two registers banks. So, program the alternate bank with new configuration and then performs bank switch. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'include/linux/soundwire')
-rw-r--r--include/linux/soundwire/sdw.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index fab7de3c00f1..61d671271592 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -23,7 +23,17 @@ struct sdw_slave;
#define SDW_MASTER_DEV_NUM 14
#define SDW_NUM_DEV_ID_REGISTERS 6
+/* frame shape defines */
+/*
+ * Note: The maximum row define in SoundWire spec 1.1 is 23. In order to
+ * fill hole with 0, one more dummy entry is added
+ */
+#define SDW_FRAME_ROWS 24
+#define SDW_FRAME_COLS 8
+#define SDW_FRAME_ROW_COLS (SDW_FRAME_ROWS * SDW_FRAME_COLS)
+
+#define SDW_FRAME_CTRL_BITS 48
#define SDW_MAX_DEVICES 11
#define SDW_VALID_PORT_RANGE(n) (n <= 14 && n >= 1)
@@ -377,6 +387,21 @@ enum sdw_reg_bank {
};
/**
+ * struct sdw_bus_conf: Bus configuration
+ *
+ * @clk_freq: Clock frequency, in Hz
+ * @num_rows: Number of rows in frame
+ * @num_cols: Number of columns in frame
+ * @bank: Next register bank
+ */
+struct sdw_bus_conf {
+ unsigned int clk_freq;
+ unsigned int num_rows;
+ unsigned int num_cols;
+ unsigned int bank;
+};
+
+/**
* struct sdw_prepare_ch: Prepare/De-prepare Data Port channel
*
* @num: Port number
@@ -413,10 +438,20 @@ enum sdw_port_prep_ops {
* @curr_bank: Current bank in use (BANK0/BANK1)
* @next_bank: Next bank to use (BANK0/BANK1). next_bank will always be
* set to !curr_bank
+ * @max_dr_freq: Maximum double rate clock frequency supported, in Hz
+ * @curr_dr_freq: Current double rate clock frequency, in Hz
+ * @bandwidth: Current bandwidth
+ * @col: Active columns
+ * @row: Active rows
*/
struct sdw_bus_params {
enum sdw_reg_bank curr_bank;
enum sdw_reg_bank next_bank;
+ unsigned int max_dr_freq;
+ unsigned int curr_dr_freq;
+ unsigned int bandwidth;
+ unsigned int col;
+ unsigned int row;
};
/**
@@ -426,6 +461,7 @@ struct sdw_bus_params {
* @interrupt_callback: Device interrupt notification (invoked in thread
* context)
* @update_status: Update Slave status
+ * @bus_config: Update the bus config for Slave
* @port_prep: Prepare the port with parameters
*/
struct sdw_slave_ops {
@@ -434,6 +470,8 @@ struct sdw_slave_ops {
struct sdw_slave_intr_status *status);
int (*update_status)(struct sdw_slave *slave,
enum sdw_slave_status status);
+ int (*bus_config)(struct sdw_slave *slave,
+ struct sdw_bus_params *params);
int (*port_prep)(struct sdw_slave *slave,
struct sdw_prepare_ch *prepare_ch,
enum sdw_port_prep_ops pre_ops);
@@ -597,6 +635,9 @@ struct sdw_defer {
* @xfer_msg: Transfer message callback
* @xfer_msg_defer: Defer version of transfer message callback
* @reset_page_addr: Reset the SCP page address registers
+ * @set_bus_conf: Set the bus configuration
+ * @pre_bank_switch: Callback for pre bank switch
+ * @post_bank_switch: Callback for post bank switch
*/
struct sdw_master_ops {
int (*read_prop)(struct sdw_bus *bus);
@@ -608,6 +649,11 @@ struct sdw_master_ops {
struct sdw_defer *defer);
enum sdw_command_response (*reset_page_addr)
(struct sdw_bus *bus, unsigned int dev_num);
+ int (*set_bus_conf)(struct sdw_bus *bus,
+ struct sdw_bus_params *params);
+ int (*pre_bank_switch)(struct sdw_bus *bus);
+ int (*post_bank_switch)(struct sdw_bus *bus);
+
};
/**
@@ -628,6 +674,7 @@ struct sdw_master_ops {
* transport and port parameters
* @defer_msg: Defer message
* @clk_stop_timeout: Clock stop timeout computed
+ * @bank_switch_timeout: Bank switch timeout computed
*/
struct sdw_bus {
struct device *dev;
@@ -643,6 +690,7 @@ struct sdw_bus {
struct list_head m_rt_list;
struct sdw_defer defer_msg;
unsigned int clk_stop_timeout;
+ u32 bank_switch_timeout;
};
int sdw_add_bus_master(struct sdw_bus *bus);