diff options
Diffstat (limited to 'usb/l0_usb.h')
| -rw-r--r-- | usb/l0_usb.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/usb/l0_usb.h b/usb/l0_usb.h new file mode 100644 index 0000000..243f19b --- /dev/null +++ b/usb/l0_usb.h @@ -0,0 +1,174 @@ +#ifndef L0_USB_H +#define L0_USB_H + +#include "generic.h" +#include "l0_usb_def.h" + +class USB_l0 : public USB_generic { + private: + L0_USB_t& usb; + + uint32_t setupbuf[16]; + + uint32_t buf_end; + + uint8_t pending_addr; + + protected: + virtual void hw_set_address(uint8_t addr) { + usb_rblog.log("SetAddress: %d", addr); + + pending_addr = addr; + } + + virtual void hw_conf_ep(uint8_t ep, EPType type, uint32_t size) { + usb_rblog.log("Configuring EP%02x: size=%d", ep, size); + + uint8_t in = ep & 0x80; + ep &= 0x7f; + + uint32_t old_epr = usb.reg.EPR[ep]; + //uint32_t new_epr = 0x3220; + uint32_t new_epr = 0x8080 | ((type == EPType::Bulk ? 0 : type == EPType::Control ? 1 : type == EPType::Isochronous ? 2 : 3) << 9) | ep; + + if(in || ep == 0) { + usb.bufd[ep].ADDR_TX = buf_end; + buf_end += size; + + new_epr |= (old_epr & 0x0070) ^ 0x0020; + } + + if(!in) { + usb.bufd[ep].ADDR_RX = buf_end; + buf_end += size; + usb.bufd[ep].COUNT_RX = 0x8000 | (1 << 10); + + new_epr |= (old_epr & 0x7000) ^ 0x3000; + } + + usb.reg.EPR[ep] = new_epr; + + usb_rblog.log("EPR: old=%04x, new=%04x", old_epr, usb.reg.EPR[ep]); + } + + virtual void hw_set_stall(uint8_t ep) { + usb_rblog.log("Setting stall on EP %d", ep); + + usb.reg.EPR[ep] = (usb.reg.EPR[ep] & 0x878f) | 0x2030; + + //otg.dev_iep_reg[ep].DIEPCTL |= (1 << 21); + } + + public: + USB_l0(L0_USB_t& usb_periph, desc_t dev, desc_t conf) : USB_generic(dev, conf), usb(usb_periph) {} + + void init() { + usb.reg.CNTR = 3; + Time::sleep(10); + usb.reg.CNTR = 1; + Time::sleep(10); + // Exit power down mode. + usb.reg.CNTR = 0; + } + + void process() { + uint32_t istr = usb.reg.ISTR; + + if(istr & (1 << 10)) { + usb_rblog.log("USB Reset"); + + buf_end = 0x40; + + usb.reg.DADDR = 0x80; + + handle_reset(); + + usb.reg.ISTR = ~(1 << 10); + + return; + } + + if(istr & (1 << 15)) { + usb_rblog.log("USB Transfer: %02x", istr & 0x1f); + + uint32_t ep = istr & 0xf; + uint32_t dir = istr & 0x10; + + usb_rblog.log("EPR%d: %04x", ep, usb.reg.EPR[ep]); + + if(dir) { + // RX. + + usb_rblog.log("RXBUF: ADDR: %04x, COUNT: %04x", usb.bufd[ep].ADDR_RX, usb.bufd[ep].COUNT_RX); + + uint32_t len = usb.bufd[ep].COUNT_RX & 0x03ff; + + if(usb.reg.EPR[ep] & (1 << 11)) { + usb_rblog.log("SETUP packet received"); + + read(0, setupbuf, 8); + + handle_setup(setupbuf); + + } else { + usb_rblog.log("OUT packet received"); + + handle_out(ep, len); + } + + //usb.reg.EPR[ep] = 0x9280; + //usb.reg.EPR[ep] &= 0x078f; + + usb.reg.EPR[ep] = (usb.reg.EPR[ep] & 0x078f) | 0x1000; + } else { + // TX. + + usb_rblog.log("TXBUF: ADDR: %04x, COUNT: %04x", usb.bufd[ep].ADDR_TX, usb.bufd[ep].COUNT_TX); + + if(pending_addr) { + usb_rblog.log("Actually changing addr to: %d", pending_addr); + + usb.reg.DADDR = 0x80 | pending_addr; + + pending_addr = 0; + } + + usb.reg.EPR[ep] &= 0x870f; + } + usb_rblog.log("Leaving: EPR%d: %04x", ep, usb.reg.EPR[ep]); + } + } + + virtual bool ep_ready(uint32_t ep) { + return (usb.reg.EPR[ep] & 0x30) == 0x20; + } + + virtual void write(uint32_t ep, uint32_t* bufp, uint32_t len) { + usb_rblog.log("Writing, ep=%d, len=%d", ep, len); + + uint16_t* p = (uint16_t*)bufp; + uint32_t base = usb.bufd[ep].ADDR_TX >> 1; + + for(uint32_t i = 0; i < len; i += 2) { + usb.buf[base + (i >> 1)] = *p++; + } + + usb.bufd[ep].COUNT_TX = len; + usb.reg.EPR[ep] = (usb.reg.EPR[ep] & 0x870f) | 0x0010; + } + + virtual uint32_t read(uint32_t ep, uint32_t* bufp, uint32_t len) { + usb_rblog.log("Reading, ep=%d, len=%d", ep, len); + + uint16_t* p = (uint16_t*)bufp; + uint32_t base = usb.bufd[ep].ADDR_RX >> 1; + + for(uint32_t i = 0; i < len; i += 2) { + *p++ = uint16_t(usb.buf[base + (i >> 1)]); + } + + return len; + } +}; + +#endif |