DEFINE_DEBUGFS_ATTRIBUTE(cdns_parity_error_fops, NULL,
cdns_parity_error_injection, "%llu\n");
+static int cdns_set_pdi_loopback_source(void *data, u64 value)
+{
+ struct sdw_cdns *cdns = data;
+ unsigned int pdi_out_num = cdns->pcm.num_bd + cdns->pcm.num_out;
+
+ if (value > pdi_out_num)
+ return -EINVAL;
+
+ /* Userspace changed the hardware state behind the kernel's back */
+ add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+ cdns->pdi_loopback_source = value;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(cdns_pdi_loopback_source_fops, NULL, cdns_set_pdi_loopback_source, "%llu\n");
+
+static int cdns_set_pdi_loopback_target(void *data, u64 value)
+{
+ struct sdw_cdns *cdns = data;
+ unsigned int pdi_in_num = cdns->pcm.num_bd + cdns->pcm.num_in;
+
+ if (value > pdi_in_num)
+ return -EINVAL;
+
+ /* Userspace changed the hardware state behind the kernel's back */
+ add_taint(TAINT_USER, LOCKDEP_STILL_OK);
+
+ cdns->pdi_loopback_target = value;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(cdns_pdi_loopback_target_fops, NULL, cdns_set_pdi_loopback_target, "%llu\n");
+
/**
* sdw_cdns_debugfs_init() - Cadence debugfs init
* @cdns: Cadence instance
debugfs_create_file("cdns-parity-error-injection", 0200, root, cdns,
&cdns_parity_error_fops);
+
+ cdns->pdi_loopback_source = -1;
+ cdns->pdi_loopback_target = -1;
+
+ debugfs_create_file("cdns-pdi-loopback-source", 0200, root, cdns,
+ &cdns_pdi_loopback_source_fops);
+
+ debugfs_create_file("cdns-pdi-loopback-target", 0200, root, cdns,
+ &cdns_pdi_loopback_target_fops);
+
}
EXPORT_SYMBOL_GPL(sdw_cdns_debugfs_init);
*/
int sdw_cdns_exit_reset(struct sdw_cdns *cdns)
{
- /* program maximum length reset to be safe */
- cdns_updatel(cdns, CDNS_MCP_CONTROL,
- CDNS_MCP_CONTROL_RST_DELAY,
- CDNS_MCP_CONTROL_RST_DELAY);
+ /* keep reset delay unchanged to 4096 cycles */
/* use hardware generated reset */
cdns_updatel(cdns, CDNS_MCP_CONTROL,
struct sdw_port_params *p_params, unsigned int bank)
{
struct sdw_cdns *cdns = bus_to_cdns(bus);
- int dpn_config = 0, dpn_config_off;
+ int dpn_config_off_source;
+ int dpn_config_off_target;
+ int target_num = p_params->num;
+ int source_num = p_params->num;
+ bool override = false;
+ int dpn_config;
+
+ if (target_num == cdns->pdi_loopback_target &&
+ cdns->pdi_loopback_source != -1) {
+ source_num = cdns->pdi_loopback_source;
+ override = true;
+ }
- if (bank)
- dpn_config_off = CDNS_DPN_B1_CONFIG(p_params->num);
- else
- dpn_config_off = CDNS_DPN_B0_CONFIG(p_params->num);
+ if (bank) {
+ dpn_config_off_source = CDNS_DPN_B1_CONFIG(source_num);
+ dpn_config_off_target = CDNS_DPN_B1_CONFIG(target_num);
+ } else {
+ dpn_config_off_source = CDNS_DPN_B0_CONFIG(source_num);
+ dpn_config_off_target = CDNS_DPN_B0_CONFIG(target_num);
+ }
- dpn_config = cdns_readl(cdns, dpn_config_off);
+ dpn_config = cdns_readl(cdns, dpn_config_off_source);
- u32p_replace_bits(&dpn_config, (p_params->bps - 1), CDNS_DPN_CONFIG_WL);
- u32p_replace_bits(&dpn_config, p_params->flow_mode, CDNS_DPN_CONFIG_PORT_FLOW);
- u32p_replace_bits(&dpn_config, p_params->data_mode, CDNS_DPN_CONFIG_PORT_DAT);
+ /* use port params if there is no loopback, otherwise use source as is */
+ if (!override) {
+ u32p_replace_bits(&dpn_config, p_params->bps - 1, CDNS_DPN_CONFIG_WL);
+ u32p_replace_bits(&dpn_config, p_params->flow_mode, CDNS_DPN_CONFIG_PORT_FLOW);
+ u32p_replace_bits(&dpn_config, p_params->data_mode, CDNS_DPN_CONFIG_PORT_DAT);
+ }
- cdns_writel(cdns, dpn_config_off, dpn_config);
+ cdns_writel(cdns, dpn_config_off_target, dpn_config);
return 0;
}
enum sdw_reg_bank bank)
{
struct sdw_cdns *cdns = bus_to_cdns(bus);
- int dpn_offsetctrl = 0, dpn_offsetctrl_off;
- int dpn_config = 0, dpn_config_off;
- int dpn_hctrl = 0, dpn_hctrl_off;
- int num = t_params->port_num;
- int dpn_samplectrl_off;
+ int dpn_config;
+ int dpn_config_off_source;
+ int dpn_config_off_target;
+ int dpn_hctrl;
+ int dpn_hctrl_off_source;
+ int dpn_hctrl_off_target;
+ int dpn_offsetctrl;
+ int dpn_offsetctrl_off_source;
+ int dpn_offsetctrl_off_target;
+ int dpn_samplectrl;
+ int dpn_samplectrl_off_source;
+ int dpn_samplectrl_off_target;
+ int source_num = t_params->port_num;
+ int target_num = t_params->port_num;
+ bool override = false;
+
+ if (target_num == cdns->pdi_loopback_target &&
+ cdns->pdi_loopback_source != -1) {
+ source_num = cdns->pdi_loopback_source;
+ override = true;
+ }
/*
* Note: Only full data port is supported on the Master side for
*/
if (bank) {
- dpn_config_off = CDNS_DPN_B1_CONFIG(num);
- dpn_samplectrl_off = CDNS_DPN_B1_SAMPLE_CTRL(num);
- dpn_hctrl_off = CDNS_DPN_B1_HCTRL(num);
- dpn_offsetctrl_off = CDNS_DPN_B1_OFFSET_CTRL(num);
+ dpn_config_off_source = CDNS_DPN_B1_CONFIG(source_num);
+ dpn_hctrl_off_source = CDNS_DPN_B1_HCTRL(source_num);
+ dpn_offsetctrl_off_source = CDNS_DPN_B1_OFFSET_CTRL(source_num);
+ dpn_samplectrl_off_source = CDNS_DPN_B1_SAMPLE_CTRL(source_num);
+
+ dpn_config_off_target = CDNS_DPN_B1_CONFIG(target_num);
+ dpn_hctrl_off_target = CDNS_DPN_B1_HCTRL(target_num);
+ dpn_offsetctrl_off_target = CDNS_DPN_B1_OFFSET_CTRL(target_num);
+ dpn_samplectrl_off_target = CDNS_DPN_B1_SAMPLE_CTRL(target_num);
+
} else {
- dpn_config_off = CDNS_DPN_B0_CONFIG(num);
- dpn_samplectrl_off = CDNS_DPN_B0_SAMPLE_CTRL(num);
- dpn_hctrl_off = CDNS_DPN_B0_HCTRL(num);
- dpn_offsetctrl_off = CDNS_DPN_B0_OFFSET_CTRL(num);
+ dpn_config_off_source = CDNS_DPN_B0_CONFIG(source_num);
+ dpn_hctrl_off_source = CDNS_DPN_B0_HCTRL(source_num);
+ dpn_offsetctrl_off_source = CDNS_DPN_B0_OFFSET_CTRL(source_num);
+ dpn_samplectrl_off_source = CDNS_DPN_B0_SAMPLE_CTRL(source_num);
+
+ dpn_config_off_target = CDNS_DPN_B0_CONFIG(target_num);
+ dpn_hctrl_off_target = CDNS_DPN_B0_HCTRL(target_num);
+ dpn_offsetctrl_off_target = CDNS_DPN_B0_OFFSET_CTRL(target_num);
+ dpn_samplectrl_off_target = CDNS_DPN_B0_SAMPLE_CTRL(target_num);
}
- dpn_config = cdns_readl(cdns, dpn_config_off);
- u32p_replace_bits(&dpn_config, t_params->blk_grp_ctrl, CDNS_DPN_CONFIG_BGC);
- u32p_replace_bits(&dpn_config, t_params->blk_pkg_mode, CDNS_DPN_CONFIG_BPM);
- cdns_writel(cdns, dpn_config_off, dpn_config);
+ dpn_config = cdns_readl(cdns, dpn_config_off_source);
+ if (!override) {
+ u32p_replace_bits(&dpn_config, t_params->blk_grp_ctrl, CDNS_DPN_CONFIG_BGC);
+ u32p_replace_bits(&dpn_config, t_params->blk_pkg_mode, CDNS_DPN_CONFIG_BPM);
+ }
+ cdns_writel(cdns, dpn_config_off_target, dpn_config);
- u32p_replace_bits(&dpn_offsetctrl, t_params->offset1, CDNS_DPN_OFFSET_CTRL_1);
- u32p_replace_bits(&dpn_offsetctrl, t_params->offset2, CDNS_DPN_OFFSET_CTRL_2);
- cdns_writel(cdns, dpn_offsetctrl_off, dpn_offsetctrl);
+ if (!override) {
+ dpn_offsetctrl = 0;
+ u32p_replace_bits(&dpn_offsetctrl, t_params->offset1, CDNS_DPN_OFFSET_CTRL_1);
+ u32p_replace_bits(&dpn_offsetctrl, t_params->offset2, CDNS_DPN_OFFSET_CTRL_2);
+ } else {
+ dpn_offsetctrl = cdns_readl(cdns, dpn_offsetctrl_off_source);
+ }
+ cdns_writel(cdns, dpn_offsetctrl_off_target, dpn_offsetctrl);
- u32p_replace_bits(&dpn_hctrl, t_params->hstart, CDNS_DPN_HCTRL_HSTART);
- u32p_replace_bits(&dpn_hctrl, t_params->hstop, CDNS_DPN_HCTRL_HSTOP);
- u32p_replace_bits(&dpn_hctrl, t_params->lane_ctrl, CDNS_DPN_HCTRL_LCTRL);
+ if (!override) {
+ dpn_hctrl = 0;
+ u32p_replace_bits(&dpn_hctrl, t_params->hstart, CDNS_DPN_HCTRL_HSTART);
+ u32p_replace_bits(&dpn_hctrl, t_params->hstop, CDNS_DPN_HCTRL_HSTOP);
+ u32p_replace_bits(&dpn_hctrl, t_params->lane_ctrl, CDNS_DPN_HCTRL_LCTRL);
+ } else {
+ dpn_hctrl = cdns_readl(cdns, dpn_hctrl_off_source);
+ }
+ cdns_writel(cdns, dpn_hctrl_off_target, dpn_hctrl);
- cdns_writel(cdns, dpn_hctrl_off, dpn_hctrl);
- cdns_writel(cdns, dpn_samplectrl_off, (t_params->sample_interval - 1));
+ if (!override)
+ dpn_samplectrl = t_params->sample_interval - 1;
+ else
+ dpn_samplectrl = cdns_readl(cdns, dpn_samplectrl_off_source);
+ cdns_writel(cdns, dpn_samplectrl_off_target, dpn_samplectrl);
return 0;
}
projects / linux-2.6-microblaze.git / blobdiff