[v2,17/49] usb: dwc2: Add core parameters for LPM support
From: Grigor Tovmasyan <hidden>
Date: 2017-12-25 11:22:31
Subsystem:
designware usb2 drd ip driver, the rest, usb subsystem · Maintainers:
Minas Harutyunyan, Linus Torvalds, Greg Kroah-Hartman
From: Sevak Arakelyan <redacted> Add lpm, lpm_clock_gating, besl, hird_threshold_en and hird_threshold core parameters. These will indicate LPM and LPM Errata support as well as chosen L1 sleeping mode for the core and PHY. Signed-off-by: Sevak Arakelyan <redacted> Signed-off-by: Grigor Tovmasyan <redacted> --- drivers/usb/dwc2/core.h | 20 ++++++++++++++++++++ drivers/usb/dwc2/debugfs.c | 5 +++++ drivers/usb/dwc2/params.c | 13 +++++++++++++ 3 files changed, 38 insertions(+)
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index e01b8124cbe7..60dc4bf910ea 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h@@ -427,6 +427,19 @@ enum dwc2_ep0_state { * needed. * 0 - No (default) * 1 - Yes + * @lpm: Enable LPM support. + * 0 - No (default) + * 1 - Yes + * @lpm_clock_gating: Enable core PHY clock gating. + * 0 - No (default) + * 1 - Yes + * @besl: Enable LPM Errata support. + * 0 - No (default) + * 1 - Yes + * @hird_threshold_en: HIRD or HIRD Threshold enable. + * 0 - No (default) + * 1 - Yes + * @hird_threshold: Value of BESL or HIRD Threshold. * @activate_stm_fs_transceiver: Activate internal transceiver using GGPIO * register. * 0 - Deactivate the transceiver (default)
@@ -486,6 +499,11 @@ struct dwc2_core_params { bool uframe_sched; bool external_id_pin_ctl; bool hibernation; + bool lpm; + bool lpm_clock_gating; + bool besl; + bool hird_threshold_en; + u8 hird_threshold; bool activate_stm_fs_transceiver; u16 max_packet_count; u32 max_transfer_size;
@@ -592,6 +610,7 @@ struct dwc2_hw_params { unsigned total_fifo_size:16; unsigned power_optimized:1; unsigned utmi_phy_data_width:2; + unsigned lpm_mode:1; u32 snpsid; u32 dev_ep_dirs; };
@@ -945,6 +964,7 @@ struct dwc2_hsotg { /* DWC OTG HW Release versions */ #define DWC2_CORE_REV_2_71a 0x4f54271a +#define DWC2_CORE_REV_2_80a 0x4f54280a #define DWC2_CORE_REV_2_90a 0x4f54290a #define DWC2_CORE_REV_2_91a 0x4f54291a #define DWC2_CORE_REV_2_92a 0x4f54292a
diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c
index f4650a88be78..bd9cd8829094 100644
--- a/drivers/usb/dwc2/debugfs.c
+++ b/drivers/usb/dwc2/debugfs.c@@ -755,6 +755,11 @@ static int params_show(struct seq_file *seq, void *v) print_param(seq, p, uframe_sched); print_param(seq, p, external_id_pin_ctl); print_param(seq, p, hibernation); + print_param(seq, p, lpm); + print_param(seq, p, lpm_clock_gating); + print_param(seq, p, besl); + print_param(seq, p, hird_threshold_en); + print_param(seq, p, hird_threshold); print_param(seq, p, host_dma); print_param(seq, p, g_dma); print_param(seq, p, g_dma_desc);
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 427e7afe2b8d..0a921315fd55 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c@@ -279,6 +279,11 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg) p->uframe_sched = true; p->external_id_pin_ctl = false; p->hibernation = false; + p->lpm = true; + p->lpm_clock_gating = true; + p->besl = false; + p->hird_threshold_en = true; + p->hird_threshold = 4; p->max_packet_count = hw->max_packet_count; p->max_transfer_size = hw->max_transfer_size; p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
@@ -529,6 +534,13 @@ static void dwc2_check_params(struct dwc2_hsotg *hsotg) CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo); CHECK_BOOL(i2c_enable, hw->i2c_enable); CHECK_BOOL(reload_ctl, (hsotg->hw_params.snpsid > DWC2_CORE_REV_2_92a)); + CHECK_BOOL(lpm, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_80a)); + CHECK_BOOL(lpm, hw->lpm_mode); + CHECK_BOOL(lpm_clock_gating, hsotg->params.lpm); + CHECK_BOOL(besl, hsotg->params.lpm); + CHECK_BOOL(besl, (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a)); + CHECK_BOOL(hird_threshold_en, hsotg->params.lpm); + CHECK_RANGE(hird_threshold, 0, hsotg->params.besl ? 12 : 7, 0); CHECK_RANGE(max_packet_count, 15, hw->max_packet_count, hw->max_packet_count);
@@ -698,6 +710,7 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg) hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C); hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >> GHWCFG3_DFIFO_DEPTH_SHIFT; + hw->lpm_mode = !!(hwcfg3 & GHWCFG3_OTG_LPM_EN); /* hwcfg4 */ hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);