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DWC OTG host mode improvements. Add support for the 3-strikes and you are

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gone rule. Optimise use of channels so that when a channel
is not ready another channel is used. Instead of using the SOF interrupt
use the system timer to drive the host statemachine. This might
give lower throughput and higher latency, but reduces the CPU usage
significantly. The DWC OTG host mode support should not be considered
for serious USB host controller applications. Some problems are still
seen with LOW speed USB devices.
This commit is contained in:
Hans Petter Selasky 2012-09-23 12:19:19 +00:00
parent 3c12706c5e
commit 3eabad2587
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=240857
3 changed files with 634 additions and 465 deletions
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1061
sys/dev/usb/controller/dwc_otg.c
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File diff suppressed because it is too large Load Diff

31
sys/dev/usb/controller/dwc_otg.h
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@ -33,6 +33,7 @@
#define DWC_OTG_MAX_TXN (0x200 * DWC_OTG_MAX_TXP)
#define DWC_OTG_MAX_CHANNELS 16
#define DWC_OTG_MAX_ENDPOINTS 16
#define DWC_OTG_HOST_TIMER_RATE 10 /* ms */
#define DWC_OTG_READ_4(sc, reg) \
bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg)
@ -56,10 +57,20 @@ struct dwc_otg_td {
uint32_t hcsplt; /* HOST CFG */
uint16_t max_packet_size; /* packet_size */
uint16_t npkt;
uint8_t sof_res;
uint8_t sof_val;
uint8_t errcnt;
uint8_t tmr_res;
uint8_t tmr_val;
uint8_t ep_no;
uint8_t channel;
uint8_t state;
#define DWC_CHAN_ST_START 0
#define DWC_CHAN_ST_WAIT_ANE 1
#define DWC_CHAN_ST_WAIT_S_ANE 2
#define DWC_CHAN_ST_WAIT_C_ANE 3
#define DWC_CHAN_ST_RX_PKT 4
#define DWC_CHAN_ST_RX_SPKT 5
#define DWC_CHAN_ST_TX_PKT 4
#define DWC_CHAN_ST_TX_CPKT 5
uint8_t error:1;
uint8_t error_any:1;
uint8_t error_stall:1;
@ -69,6 +80,7 @@ struct dwc_otg_td {
uint8_t toggle:1;
uint8_t set_toggle:1;
uint8_t got_short:1;
uint8_t did_nak:1;
};
struct dwc_otg_std_temp {
@ -127,21 +139,16 @@ struct dwc_otg_profile {
};
struct dwc_otg_chan_state {
uint32_t hcchar;
uint32_t hcint;
uint32_t hcsplt;
uint8_t state;
#define DWC_CHAN_ST_START 0
#define DWC_CHAN_ST_WAIT_ANE 1
#define DWC_CHAN_ST_WAIT_S_ANE 2
#define DWC_CHAN_ST_WAIT_C_ANE 3
uint8_t sof_requested;
uint8_t allocated;
uint8_t suspended;
};
struct dwc_otg_softc {
struct usb_bus sc_bus;
union dwc_otg_hub_temp sc_hub_temp;
struct dwc_otg_profile sc_hw_ep_profile[DWC_OTG_MAX_ENDPOINTS];
struct usb_callout sc_timer;
struct usb_device *sc_devices[DWC_OTG_MAX_DEVICES];
struct resource *sc_io_res;
@ -160,12 +167,12 @@ struct dwc_otg_softc {
uint32_t sc_out_ctl[DWC_OTG_MAX_ENDPOINTS];
uint32_t sc_in_ctl[DWC_OTG_MAX_ENDPOINTS];
struct dwc_otg_chan_state sc_chan_state[DWC_OTG_MAX_CHANNELS];
uint32_t sc_sof_refs;
uint32_t sc_sof_val;
uint32_t sc_tmr_val;
uint32_t sc_hprt_val;
uint16_t sc_active_rx_ep;
uint8_t sc_timer_active;
uint8_t sc_dev_ep_max;
uint8_t sc_dev_in_ep_max;
uint8_t sc_host_ch_max;

7
sys/dev/usb/controller/dwc_otgreg.h
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@ -541,7 +541,12 @@
#define HCSPLT_PRTADDR_SHIFT 0
#define HCSPLT_PRTADDR_MASK 0x0000007f
#define HCINT_SUSPEND_ONLY (1<<21) /* BSD only */
#define HCINT_ERRORS \
(HCINT_BBLERR | HCINT_XACTERR)
#define HCINT_RETRY \
(HCINT_DATATGLERR | HCINT_FRMOVRUN | HCINT_NAK)
#define HCINT_HALTED_ONLY (1<<21) /* BSD only */
#define HCINT_SOFTWARE_ONLY (1<<20) /* BSD only */
#define HCINT_DATATGLERR (1<<10)
#define HCINT_FRMOVRUN (1<<9)