diff options
Diffstat (limited to 'example-cdc/usb_stm32f103.c')
| -rw-r--r-- | example-cdc/usb_stm32f103.c | 1127 |
1 files changed, 0 insertions, 1127 deletions
diff --git a/example-cdc/usb_stm32f103.c b/example-cdc/usb_stm32f103.c deleted file mode 100644 index 80fbcc7..0000000 --- a/example-cdc/usb_stm32f103.c +++ /dev/null @@ -1,1127 +0,0 @@ -#include <stdint.h> -#include <stdlib.h> - -#include "sys.h" -#include "usb_lld.h" - -#define USB_MAX_PACKET_SIZE 64 /* For FS device */ - -enum STANDARD_REQUESTS -{ - GET_STATUS = 0, - CLEAR_FEATURE, - RESERVED1, - SET_FEATURE, - RESERVED2, - SET_ADDRESS, - GET_DESCRIPTOR, - SET_DESCRIPTOR, - GET_CONFIGURATION, - SET_CONFIGURATION, - GET_INTERFACE, - SET_INTERFACE, - SYNCH_FRAME, - TOTAL_REQUEST /* Total number of Standard request */ -}; - -/* The state machine states of a control pipe */ -enum CONTROL_STATE -{ - WAIT_SETUP, - SETTING_UP, - IN_DATA, - OUT_DATA, - LAST_IN_DATA, - WAIT_STATUS_IN, - WAIT_STATUS_OUT, - STALLED, - PAUSE -}; - -enum FEATURE_SELECTOR -{ - ENDPOINT_STALL, - DEVICE_REMOTE_WAKEUP -}; - -struct DATA_INFO -{ - uint8_t *addr; - uint16_t len; - uint8_t require_zlp; -}; - - -struct DEVICE_INFO -{ - uint8_t current_configuration; - uint8_t current_feature; - uint8_t state; - /**/ - uint8_t bmRequestType; - uint8_t bRequest; - /**/ - uint16_t value; - uint16_t index; - uint16_t len; -}; - -static struct DEVICE_INFO device_info; -static struct DATA_INFO data_info; - -static struct DEVICE_INFO *const dev_p = &device_info; -static struct DATA_INFO *const data_p = &data_info; - -#define REG_BASE (0x40005C00UL) /* USB_IP Peripheral Registers base address */ -#define PMA_ADDR (0x40006000UL) /* USB_IP Packet Memory Area base address */ - -/* Control register */ -#define CNTR ((volatile uint16_t *)(REG_BASE + 0x40)) -/* Interrupt status register */ -#define ISTR ((volatile uint16_t *)(REG_BASE + 0x44)) -/* Frame number register */ -#define FNR ((volatile uint16_t *)(REG_BASE + 0x48)) -/* Device address register */ -#define DADDR ((volatile uint16_t *)(REG_BASE + 0x4C)) -/* Buffer Table address register */ -#define BTABLE ((volatile uint16_t *)(REG_BASE + 0x50)) - -#define ISTR_CTR (0x8000) /* Correct TRansfer (read-only bit) */ -#define ISTR_OVR (0x4000) /* OVeR/underrun (clear-only bit) */ -#define ISTR_ERR (0x2000) /* ERRor (clear-only bit) */ -#define ISTR_WKUP (0x1000) /* WaKe UP (clear-only bit) */ -#define ISTR_SUSP (0x0800) /* SUSPend (clear-only bit) */ -#define ISTR_RESET (0x0400) /* RESET (clear-only bit) */ -#define ISTR_SOF (0x0200) /* Start Of Frame (clear-only bit) */ -#define ISTR_ESOF (0x0100) /* Expected Start Of Frame (clear-only bit) */ - -#define ISTR_DIR (0x0010) /* DIRection of transaction (read-only bit) */ -#define ISTR_EP_ID (0x000F) /* EndPoint IDentifier (read-only bit) */ - -#define CLR_OVR (~ISTR_OVR) /* clear OVeR/underrun bit*/ -#define CLR_ERR (~ISTR_ERR) /* clear ERRor bit */ -#define CLR_WKUP (~ISTR_WKUP) /* clear WaKe UP bit */ -#define CLR_SUSP (~ISTR_SUSP) /* clear SUSPend bit */ -#define CLR_RESET (~ISTR_RESET) /* clear RESET bit */ -#define CLR_SOF (~ISTR_SOF) /* clear Start Of Frame bit */ -#define CLR_ESOF (~ISTR_ESOF) /* clear Expected Start Of Frame bit */ - -#define CNTR_CTRM (0x8000) /* Correct TRansfer Mask */ -#define CNTR_OVRM (0x4000) /* OVeR/underrun Mask */ -#define CNTR_ERRM (0x2000) /* ERRor Mask */ -#define CNTR_WKUPM (0x1000) /* WaKe UP Mask */ -#define CNTR_SUSPM (0x0800) /* SUSPend Mask */ -#define CNTR_RESETM (0x0400) /* RESET Mask */ -#define CNTR_SOFM (0x0200) /* Start Of Frame Mask */ -#define CNTR_ESOFM (0x0100) /* Expected Start Of Frame Mask */ - -#define CNTR_RESUME (0x0010) /* RESUME request */ -#define CNTR_FSUSP (0x0008) /* Force SUSPend */ -#define CNTR_LPMODE (0x0004) /* Low-power MODE */ -#define CNTR_PDWN (0x0002) /* Power DoWN */ -#define CNTR_FRES (0x0001) /* Force USB RESet */ - -#define DADDR_EF (0x80) -#define DADDR_ADD (0x7F) - -#define EP_CTR_RX (0x8000) /* EndPoint Correct TRansfer RX */ -#define EP_DTOG_RX (0x4000) /* EndPoint Data TOGGLE RX */ -#define EPRX_STAT (0x3000) /* EndPoint RX STATus bit field */ -#define EP_SETUP (0x0800) /* EndPoint SETUP */ -#define EP_T_FIELD (0x0600) /* EndPoint TYPE */ -#define EP_KIND (0x0100) /* EndPoint KIND */ -#define EP_CTR_TX (0x0080) /* EndPoint Correct TRansfer TX */ -#define EP_DTOG_TX (0x0040) /* EndPoint Data TOGGLE TX */ -#define EPTX_STAT (0x0030) /* EndPoint TX STATus bit field */ -#define EPADDR_FIELD (0x000F) /* EndPoint ADDRess FIELD */ - -#define EPREG_MASK (EP_CTR_RX|EP_SETUP|EP_T_FIELD|EP_KIND|EP_CTR_TX|EPADDR_FIELD) - -/* STAT_TX[1:0] STATus for TX transfer */ -#define EP_TX_DIS (0x0000) /* EndPoint TX DISabled */ -#define EP_TX_STALL (0x0010) /* EndPoint TX STALLed */ -#define EP_TX_NAK (0x0020) /* EndPoint TX NAKed */ -#define EP_TX_VALID (0x0030) /* EndPoint TX VALID */ -#define EPTX_DTOG1 (0x0010) /* EndPoint TX Data TOGgle bit1 */ -#define EPTX_DTOG2 (0x0020) /* EndPoint TX Data TOGgle bit2 */ - -/* STAT_RX[1:0] STATus for RX transfer */ -#define EP_RX_DIS (0x0000) /* EndPoint RX DISabled */ -#define EP_RX_STALL (0x1000) /* EndPoint RX STALLed */ -#define EP_RX_NAK (0x2000) /* EndPoint RX NAKed */ -#define EP_RX_VALID (0x3000) /* EndPoint RX VALID */ -#define EPRX_DTOG1 (0x1000) /* EndPoint RX Data TOGgle bit1 */ -#define EPRX_DTOG2 (0x2000) /* EndPoint RX Data TOGgle bit1 */ - -static void usb_handle_transfer (uint16_t istr_value); - -static void st103_set_btable (void) -{ - *BTABLE = 0; -} - -static uint16_t st103_get_istr (void) -{ - return *ISTR; -} - -static void st103_set_istr (uint16_t istr) -{ - *ISTR = istr; -} - -static void st103_set_cntr (uint16_t cntr) -{ - *CNTR = cntr; -} - -static void st103_set_daddr (uint16_t daddr) -{ - *DADDR = daddr | DADDR_EF; -} - -static void st103_set_epreg (uint8_t ep_num, uint16_t value) -{ - uint16_t *reg_p = (uint16_t *)(REG_BASE + ep_num*4); - - *reg_p = value; -} - -static uint16_t st103_get_epreg (uint8_t ep_num) -{ - uint16_t *reg_p = (uint16_t *)(REG_BASE + ep_num*4); - - return *reg_p; -} - -static void st103_set_tx_addr (uint8_t ep_num, uint16_t addr) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+0)*2); - - *reg_p = addr; -} - -static uint16_t st103_get_tx_addr (uint8_t ep_num) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+0)*2); - - return *reg_p; -} - - -static void st103_set_tx_count (uint8_t ep_num, uint16_t size) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+2)*2); - - *reg_p = size; -} - -static uint16_t st103_get_tx_count (uint8_t ep_num) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+2)*2); - - return *reg_p & 0x03ff; -} - - -static void st103_set_rx_addr (uint8_t ep_num, uint16_t addr) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+4)*2); - - *reg_p = addr; -} - -static uint16_t st103_get_rx_addr (uint8_t ep_num) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+4)*2); - - return *reg_p; -} - - -static void st103_set_rx_buf_size (uint8_t ep_num, uint16_t size) -{ /* Assume size is even */ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+6)*2); - uint16_t value; - - if (size <= 62) - value = (size & 0x3e) << 9; - else - value = 0x8000 | (((size >> 5) - 1) << 10); - - *reg_p = value; -} - -static uint16_t st103_get_rx_count (uint8_t ep_num) -{ - uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+6)*2); - - return *reg_p & 0x03ff; -} - - -static void st103_ep_clear_ctr_rx (uint8_t ep_num) -{ - uint16_t value = st103_get_epreg (ep_num) & ~EP_CTR_RX & EPREG_MASK; - - st103_set_epreg (ep_num, value); -} - -static void st103_ep_clear_ctr_tx (uint8_t ep_num) -{ - uint16_t value = st103_get_epreg (ep_num) & ~EP_CTR_TX & EPREG_MASK; - - st103_set_epreg (ep_num, value); -} - -static void st103_ep_set_rxtx_status (uint8_t ep_num, uint16_t st_rx, - uint16_t st_tx) -{ - uint16_t value = st103_get_epreg (ep_num); - - value &= (EPREG_MASK|EPRX_STAT|EPTX_STAT); - value ^= (EPRX_DTOG1 & st_rx); - value ^= (EPRX_DTOG2 & st_rx); - value ^= (EPTX_DTOG1 & st_tx); - value ^= (EPTX_DTOG2 & st_tx); - value |= EP_CTR_RX | EP_CTR_TX; - st103_set_epreg (ep_num, value); -} - -static void st103_ep_set_rx_status (uint8_t ep_num, uint16_t st_rx) -{ - uint16_t value = st103_get_epreg (ep_num); - - value &= (EPREG_MASK|EPRX_STAT); - value ^= (EPRX_DTOG1 & st_rx); - value ^= (EPRX_DTOG2 & st_rx); - value |= EP_CTR_RX | EP_CTR_TX; - st103_set_epreg (ep_num, value); -} - -static uint16_t st103_ep_get_rx_status (uint8_t ep_num) -{ - uint16_t value = st103_get_epreg (ep_num); - - return value & EPRX_STAT; -} - -static void st103_ep_set_tx_status (uint8_t ep_num, uint16_t st_tx) -{ - uint16_t value = st103_get_epreg (ep_num); - - value &= (EPREG_MASK|EPTX_STAT); - value ^= (EPTX_DTOG1 & st_tx); - value ^= (EPTX_DTOG2 & st_tx); - value |= EP_CTR_RX | EP_CTR_TX; - st103_set_epreg (ep_num, value); -} - -static uint16_t st103_ep_get_tx_status (uint8_t ep_num) -{ - uint16_t value = st103_get_epreg (ep_num); - - return value & EPTX_STAT; -} - -static void st103_ep_clear_dtog_rx (uint8_t ep_num) -{ - uint16_t value = st103_get_epreg (ep_num); - - if ((value & EP_DTOG_RX)) - { - value &= EPREG_MASK; - value |= EP_CTR_RX | EP_CTR_TX | EP_DTOG_RX; - st103_set_epreg (ep_num, value); - } -} - -static void st103_ep_clear_dtog_tx (uint8_t ep_num) -{ - uint16_t value = st103_get_epreg (ep_num); - - if ((value & EP_DTOG_TX)) - { - value &= EPREG_MASK; - value |= EP_CTR_RX | EP_CTR_TX | EP_DTOG_TX; - st103_set_epreg (ep_num, value); - } -} - -void usb_lld_init (uint8_t feature) -{ - usb_lld_sys_init (); - - dev_p->state = IN_DATA; - - usb_lld_set_configuration (0); - dev_p->current_feature = feature; - - /* Reset USB */ - st103_set_cntr (CNTR_FRES); - st103_set_cntr (0); - - /* Clear Interrupt Status Register, and enable interrupt for USB */ - st103_set_istr (0); - st103_set_cntr (CNTR_CTRM | CNTR_RESETM); -} - -void usb_lld_prepare_shutdown (void) -{ - st103_set_istr (0); - st103_set_cntr (0); -} - -void usb_lld_shutdown (void) -{ - st103_set_cntr (CNTR_PDWN); - usb_lld_sys_shutdown (); -} - -void -usb_interrupt_handler (void) -{ - uint16_t istr_value = st103_get_istr (); - - if ((istr_value & ISTR_RESET)) - { - st103_set_istr (CLR_RESET); - usb_cb_device_reset (); - } - else - { - if ((istr_value & ISTR_OVR)) - st103_set_istr (CLR_OVR); - - if ((istr_value & ISTR_ERR)) - st103_set_istr (CLR_ERR); - - if ((istr_value & ISTR_CTR)) - usb_handle_transfer (istr_value); - } -} - -static void handle_datastage_out (void) -{ - if (data_p->addr && data_p->len) - { - uint32_t len = st103_get_rx_count (ENDP0); - - if (len > data_p->len) - len = data_p->len; - - usb_lld_from_pmabuf (data_p->addr, st103_get_rx_addr (ENDP0), len); - data_p->len -= len; - data_p->addr += len; - } - - if (data_p->len == 0) - { - dev_p->state = WAIT_STATUS_IN; - st103_set_tx_count (ENDP0, 0); - st103_ep_set_rxtx_status (ENDP0, EP_RX_STALL, EP_TX_VALID); - } - else - { - dev_p->state = OUT_DATA; - st103_ep_set_rx_status (ENDP0, EP_RX_VALID); - } -} - -static void handle_datastage_in (void) -{ - uint32_t len = USB_MAX_PACKET_SIZE;; - - if ((data_p->len == 0) && (dev_p->state == LAST_IN_DATA)) - { - if (data_p->require_zlp) - { - data_p->require_zlp = 0; - - /* No more data to send. Send empty packet */ - st103_set_tx_count (ENDP0, 0); - st103_ep_set_rxtx_status (ENDP0, EP_RX_VALID, EP_TX_VALID); - } - else - { - /* No more data to send, proceed to receive OUT acknowledge.*/ - dev_p->state = WAIT_STATUS_OUT; - st103_ep_set_rxtx_status (ENDP0, EP_RX_VALID, EP_TX_STALL); - } - - return; - } - - dev_p->state = (data_p->len <= len) ? LAST_IN_DATA : IN_DATA; - - if (len > data_p->len) - len = data_p->len; - - usb_lld_to_pmabuf (data_p->addr, st103_get_tx_addr (ENDP0), len); - data_p->len -= len; - data_p->addr += len; - st103_set_tx_count (ENDP0, len); - st103_ep_set_tx_status (ENDP0, EP_TX_VALID); -} - -typedef int (*HANDLER) (uint8_t req, struct req_args *arg); - -static int std_none (uint8_t req, struct req_args *arg) -{ - (void)req; (void)arg; - return USB_UNSUPPORT; -} - -static int std_get_status (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - uint16_t status_info = 0; - - if (arg->value != 0 || arg->len != 2 || (arg->index >> 8) != 0 - || USB_SETUP_SET (req)) - return USB_UNSUPPORT; - - if (rcp == DEVICE_RECIPIENT) - { - if (arg->index == 0) - { - /* Get Device Status */ - uint8_t feature = dev_p->current_feature; - - /* Remote Wakeup enabled */ - if ((feature & (1 << 5))) - status_info |= 2; - else - status_info &= ~2; - - /* Bus-powered */ - if ((feature & (1 << 6))) - status_info |= 1; - else /* Self-powered */ - status_info &= ~1; - - return usb_lld_reply_request (&status_info, 2, arg); - } - } - else if (rcp == INTERFACE_RECIPIENT) - { - int r; - - if (dev_p->current_configuration == 0) - return USB_UNSUPPORT; - - r = usb_cb_interface (USB_QUERY_INTERFACE, arg); - if (r != USB_SUCCESS) - return USB_UNSUPPORT; - - return usb_lld_reply_request (&status_info, 2, arg); - } - else if (rcp == ENDPOINT_RECIPIENT) - { - uint8_t endpoint = (arg->index & 0x0f); - uint16_t status; - - if ((arg->index & 0x70) || endpoint == ENDP0) - return USB_UNSUPPORT; - - if ((arg->index & 0x80)) - { - status = st103_ep_get_tx_status (endpoint); - if (status == 0) /* Disabled */ - return USB_UNSUPPORT; - else if (status == EP_TX_STALL) - status_info |= 1; /* IN Endpoint stalled */ - } - else - { - status = st103_ep_get_rx_status (endpoint); - if (status == 0) /* Disabled */ - return USB_UNSUPPORT; - else if (status == EP_RX_STALL) - status_info |= 1; /* OUT Endpoint stalled */ - } - - return usb_lld_reply_request (&status_info, 2, arg); - } - - return USB_UNSUPPORT; -} - -static int std_clear_feature (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_GET (req)) - return USB_UNSUPPORT; - - if (rcp == DEVICE_RECIPIENT) - { - if (arg->len != 0 || arg->index != 0) - return USB_UNSUPPORT; - - if (arg->value == DEVICE_REMOTE_WAKEUP) - { - dev_p->current_feature &= ~(1 << 5); - return USB_SUCCESS; - } - } - else if (rcp == ENDPOINT_RECIPIENT) - { - uint8_t endpoint = (arg->index & 0x0f); - uint16_t status; - - if (dev_p->current_configuration == 0) - return USB_UNSUPPORT; - - if (arg->len != 0 || (arg->index >> 8) != 0 - || arg->value != ENDPOINT_STALL || endpoint == ENDP0) - return USB_UNSUPPORT; - - if ((arg->index & 0x80)) - status = st103_ep_get_tx_status (endpoint); - else - status = st103_ep_get_rx_status (endpoint); - - if (status == 0) /* Disabled */ - return USB_UNSUPPORT; - - if (arg->index & 0x80) /* IN endpoint */ - st103_ep_clear_dtog_tx (endpoint); - else /* OUT endpoint */ - st103_ep_clear_dtog_rx (endpoint); - - // event?? - return USB_SUCCESS; - } - - return USB_UNSUPPORT; -} - -static int std_set_feature (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_GET (req)) - return USB_UNSUPPORT; - - if (rcp == DEVICE_RECIPIENT) - { - if (arg->len != 0 || arg->index != 0) - return USB_UNSUPPORT; - - if (arg->value == DEVICE_REMOTE_WAKEUP) - { - dev_p->current_feature |= 1 << 5; - // event?? - return USB_SUCCESS; - } - } - else if (rcp == ENDPOINT_RECIPIENT) - { - uint8_t endpoint = (arg->index & 0x0f); - uint32_t status; - - if (dev_p->current_configuration == 0) - return USB_UNSUPPORT; - - if (arg->len != 0 || (arg->index >> 8) != 0 - || arg->value != 0 || endpoint == ENDP0) - return USB_UNSUPPORT; - - if ((arg->index & 0x80)) - status = st103_ep_get_tx_status (endpoint); - else - status = st103_ep_get_rx_status (endpoint); - - if (status == 0) /* Disabled */ - return USB_UNSUPPORT; - - if (arg->index & 0x80) - /* IN endpoint */ - st103_ep_set_tx_status (endpoint, EP_TX_STALL); - else - /* OUT endpoint */ - st103_ep_set_rx_status (endpoint, EP_RX_STALL); - - // event?? - return USB_SUCCESS; - } - - return USB_UNSUPPORT; -} - -static int std_set_address (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_GET (req)) - return USB_UNSUPPORT; - - if (rcp == DEVICE_RECIPIENT && arg->len == 0 && arg->value <= 127 - && arg->index == 0 && dev_p->current_configuration == 0) - return USB_SUCCESS; - - return USB_UNSUPPORT; -} - -static int std_get_descriptor (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_SET (req)) - return USB_UNSUPPORT; - - return usb_cb_get_descriptor (rcp, (arg->value >> 8), - (arg->value & 0xff), arg); -} - -static int std_get_configuration (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_SET (req)) - return USB_UNSUPPORT; - - if (rcp == DEVICE_RECIPIENT) - return usb_lld_reply_request (&dev_p->current_configuration, 1, arg); - - return USB_UNSUPPORT; -} - -static int std_set_configuration (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_GET (req)) - return USB_UNSUPPORT; - - if (rcp == DEVICE_RECIPIENT && arg->index == 0 && arg->len == 0) - return usb_cb_handle_event (USB_EVENT_CONFIG, arg->value); - - return USB_UNSUPPORT; -} - -static int std_get_interface (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_SET (req)) - return USB_UNSUPPORT; - - if (rcp == INTERFACE_RECIPIENT) - { - if (arg->value != 0 || (arg->index >> 8) != 0 || arg->len != 1) - return USB_UNSUPPORT; - - if (dev_p->current_configuration == 0) - return USB_UNSUPPORT; - - return usb_cb_interface (USB_GET_INTERFACE, arg); - } - - return USB_UNSUPPORT; -} - -static int std_set_interface (uint8_t req, struct req_args *arg) -{ - uint8_t rcp = req & RECIPIENT; - - if (USB_SETUP_GET (req) || rcp != INTERFACE_RECIPIENT - || arg->len != 0 || (arg->index >> 8) != 0 - || (arg->value >> 8) != 0 || dev_p->current_configuration == 0) - return USB_UNSUPPORT; - - return usb_cb_interface (USB_SET_INTERFACE, arg); -} - - -static void handle_setup0 (void) -{ - const uint16_t *pw; - uint16_t w; - uint8_t req_no; - int r = USB_UNSUPPORT; - HANDLER handler; - - pw = (uint16_t *)(PMA_ADDR + (uint8_t *)(st103_get_rx_addr (ENDP0) * 2)); - w = *pw++; - - dev_p->bmRequestType = w & 0xff; - dev_p->bRequest = req_no = w >> 8; - pw++; - dev_p->value = *pw++; - pw++; - dev_p->index = *pw++; - pw++; - dev_p->len = *pw; - - data_p->addr = NULL; - data_p->len = 0; - data_p->require_zlp = 0; - - if ((dev_p->bmRequestType & REQUEST_TYPE) == STANDARD_REQUEST) - { - if (req_no < TOTAL_REQUEST) - { - switch (req_no) - { - case 0: handler = std_get_status; break; - case 1: handler = std_clear_feature; break; - case 3: handler = std_set_feature; break; - case 5: handler = std_set_address; break; - case 6: handler = std_get_descriptor; break; - case 8: handler = std_get_configuration; break; - case 9: handler = std_set_configuration; break; - case 10: handler = std_get_interface; break; - case 11: handler = std_set_interface; break; - default: handler = std_none; break; - } - - r = (*handler) (dev_p->bmRequestType, - (struct req_args *)&dev_p->value); - } - } - else - r = usb_cb_setup (dev_p->bmRequestType, req_no, - (struct req_args *)&dev_p->value); - - if (r != USB_SUCCESS) - dev_p->state = STALLED; - else - { - if (USB_SETUP_SET (dev_p->bmRequestType)) - { - if (dev_p->len == 0) - { - dev_p->state = WAIT_STATUS_IN; - st103_set_tx_count (ENDP0, 0); - st103_ep_set_rxtx_status (ENDP0, EP_RX_STALL, EP_TX_VALID); - } - else - { - dev_p->state = OUT_DATA; - st103_ep_set_rx_status (ENDP0, EP_RX_VALID); - } - } - } -} - -static void handle_in0 (void) -{ - if (dev_p->state == IN_DATA || dev_p->state == LAST_IN_DATA) - handle_datastage_in (); - else if (dev_p->state == WAIT_STATUS_IN) - { - if ((dev_p->bRequest == SET_ADDRESS) && - ((dev_p->bmRequestType & (REQUEST_TYPE | RECIPIENT)) - == (STANDARD_REQUEST | DEVICE_RECIPIENT))) - { - st103_set_daddr (dev_p->value); - usb_cb_handle_event (USB_EVENT_ADDRESS, dev_p->value); - } - else - usb_cb_ctrl_write_finish (dev_p->bmRequestType, dev_p->bRequest, - (struct req_args *)&dev_p->value); - - dev_p->state = STALLED; - } - else - dev_p->state = STALLED; -} - -static void handle_out0 (void) -{ - if (dev_p->state == IN_DATA || dev_p->state == LAST_IN_DATA) - /* host aborts the transfer before finish */ - dev_p->state = STALLED; - else if (dev_p->state == OUT_DATA) - handle_datastage_out (); - else if (dev_p->state == WAIT_STATUS_OUT) - dev_p->state = STALLED; - /* Unexpect state, STALL the endpoint */ - else - dev_p->state = STALLED; -} - -static void -usb_handle_transfer (uint16_t istr_value) -{ - uint16_t ep_value = 0; - uint8_t ep_index; - - ep_index = (istr_value & ISTR_EP_ID); - /* Decode and service non control endpoints interrupt */ - /* process related endpoint register */ - ep_value = st103_get_epreg (ep_index); - - if (ep_index == 0) - { - if ((ep_value & EP_CTR_TX)) - { - st103_ep_clear_ctr_tx (ep_index); - handle_in0 (); - } - - if ((ep_value & EP_CTR_RX)) - { - st103_ep_clear_ctr_rx (ep_index); - - if ((ep_value & EP_SETUP)) - handle_setup0 (); - else - handle_out0 (); - } - - if (dev_p->state == STALLED) - st103_ep_set_rxtx_status (ENDP0, EP_RX_STALL, EP_TX_STALL); - } - else - { - if ((ep_value & EP_CTR_RX)) - { - st103_ep_clear_ctr_rx (ep_index); - usb_cb_rx_ready (ep_index); - } - - if ((ep_value & EP_CTR_TX)) - { - st103_ep_clear_ctr_tx (ep_index); - usb_cb_tx_done (ep_index); - } - } -} - -void usb_lld_reset (uint8_t feature) -{ - usb_lld_set_configuration (0); - dev_p->current_feature = feature; - st103_set_btable (); - st103_set_daddr (0); -} - -void usb_lld_txcpy (const void *src, - int ep_num, int offset, size_t len) -{ - usb_lld_to_pmabuf (src, st103_get_tx_addr (ep_num) + offset, len); -} - -void usb_lld_write (uint8_t ep_num, const void *buf, size_t len) -{ - usb_lld_to_pmabuf (buf, st103_get_tx_addr (ep_num), len); - st103_set_tx_count (ep_num, len); - st103_ep_set_tx_status (ep_num, EP_TX_VALID); -} - -void usb_lld_rxcpy (uint8_t *dst, - int ep_num, int offset, size_t len) -{ - usb_lld_from_pmabuf (dst, st103_get_rx_addr (ep_num) + offset, len); -} - -void usb_lld_tx_enable (int ep_num, size_t len) -{ - st103_set_tx_count (ep_num, len); - st103_ep_set_tx_status (ep_num, EP_TX_VALID); -} - -int usb_lld_tx_data_len (int ep_num) -{ - return st103_get_tx_count (ep_num); -} - -int usb_lld_rx_data_len (int ep_num) -{ - return st103_get_rx_count (ep_num); -} - -void usb_lld_stall_tx (int ep_num) -{ - st103_ep_set_tx_status (ep_num, EP_TX_STALL); -} - -void usb_lld_stall_rx (int ep_num) -{ - st103_ep_set_rx_status (ep_num, EP_RX_STALL); -} - -void usb_lld_rx_enable (int ep_num) -{ - st103_ep_set_rx_status (ep_num, EP_RX_VALID); -} - -void usb_lld_setup_endpoint (int ep_num, int ep_type, int ep_kind, - int ep_rx_addr, int ep_tx_addr, - int ep_rx_buf_size) -{ - uint16_t epreg_value = st103_get_epreg (ep_num); - uint16_t ep_rxtx_status = 0; /* Both disabled */ - - /* Clear: Write 1 if 1: EP_DTOG_RX, EP_DTOG_TX */ - /* Set: Write: EP_T_FIELD, EP_KIND, EPADDR_FIELD */ - /* Set: Toggle: EPRX_STAT, EPTX_STAT */ - epreg_value &= (EPRX_STAT | EP_SETUP | EPTX_STAT | EP_DTOG_RX | EP_DTOG_TX); -#if USB_KEEP_CORRECT_TRANSFER_FLAGS - /* Keep: Write 1: EP_CTR_RX, EP_CTR_TX */ - epreg_value |= (EP_CTR_RX|EP_CTR_TX); -#else - /* Clear: Write 0: EP_CTR_RX, EP_CTR_TX */ -#endif - epreg_value |= ep_type; - epreg_value |= ep_kind; - epreg_value |= ep_num; - - if (ep_rx_addr) - { - ep_rxtx_status |= EP_RX_VALID; - st103_set_rx_addr (ep_num, ep_rx_addr); - st103_set_rx_buf_size (ep_num, ep_rx_buf_size); - } - - if (ep_tx_addr) - { - ep_rxtx_status |= EP_TX_NAK; - st103_set_tx_addr (ep_num, ep_tx_addr); - } - - epreg_value ^= (EPRX_DTOG1 & ep_rxtx_status); - epreg_value ^= (EPRX_DTOG2 & ep_rxtx_status); - epreg_value ^= (EPTX_DTOG1 & ep_rxtx_status); - epreg_value ^= (EPTX_DTOG2 & ep_rxtx_status); - - st103_set_epreg (ep_num, epreg_value); -} - -void usb_lld_set_configuration (uint8_t config) -{ - dev_p->current_configuration = config; -} - -uint8_t usb_lld_current_configuration (void) -{ - return dev_p->current_configuration; -} - -void usb_lld_set_data_to_recv (void *p, size_t len) -{ - data_p->addr = p; - data_p->len = len; -} - -void usb_lld_to_pmabuf (const void *src, uint16_t addr, size_t n) -{ - const uint8_t *s = (const uint8_t *)src; - uint16_t *p; - uint16_t w; - - if (n == 0) - return; - - if ((addr & 1)) - { - p = (uint16_t *)(PMA_ADDR + (addr - 1) * 2); - w = *p; - w = (w & 0xff) | (*s++) << 8; - *p = w; - p += 2; - n--; - } - else - p = (uint16_t *)(PMA_ADDR + addr * 2); - - while (n >= 2) - { - w = *s++; - w |= (*s++) << 8; - *p = w; - p += 2; - n -= 2; - } - - if (n > 0) - { - w = *s; - *p = w; - } -} - -void usb_lld_from_pmabuf (void *dst, uint16_t addr, size_t n) -{ - uint8_t *d = (uint8_t *)dst; - uint16_t *p; - uint16_t w; - - if (n == 0) - return; - - if ((addr & 1)) - { - p = (uint16_t *)(PMA_ADDR + (addr - 1) * 2); - w = *p; - *d++ = (w >> 8); - p += 2; - n--; - } - else - p = (uint16_t *)(PMA_ADDR + addr * 2); - - while (n >= 2) - { - w = *p; - *d++ = (w & 0xff); - *d++ = (w >> 8); - p += 2; - n -= 2; - } - - if (n > 0) - { - w = *p; - *d = (w & 0xff); - } -} - - -/* - * BUF: Pointer to data memory. Data memory should not be allocated - * on stack when BUFLEN > USB_MAX_PACKET_SIZE. - * - * BUFLEN: size of the data. - */ -int -usb_lld_reply_request (const void *buf, size_t buflen, struct req_args *ctl) -{ - uint32_t len_asked = ctl->len; - uint32_t len; - - data_p->addr = (void *)buf; - data_p->len = buflen; - - /* Restrict the data length to be the one host asks for */ - if (data_p->len > len_asked) - data_p->len = len_asked; - - if (data_p->len != 0 && (data_p->len % USB_MAX_PACKET_SIZE) == 0) - data_p->require_zlp = 1; - - if (data_p->len < USB_MAX_PACKET_SIZE) - { - len = data_p->len; - dev_p->state = LAST_IN_DATA; - } - else - { - len = USB_MAX_PACKET_SIZE; - dev_p->state = IN_DATA; - } - - if (len) - { - usb_lld_to_pmabuf (data_p->addr, st103_get_tx_addr (ENDP0), len); - data_p->len -= len; - data_p->addr += len; - } - - st103_set_tx_count (ENDP0, len); - st103_ep_set_tx_status (ENDP0, EP_TX_VALID); - return USB_SUCCESS; -} |