From 9f16e5e051c2cf11465d00a2ee0265039e448b06 Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Mon, 30 May 2016 14:57:10 +0900
Subject: consolidate mcu-chip specific code
---
mcu/usb-stm32f103.c | 1127 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 1127 insertions(+)
create mode 100644 mcu/usb-stm32f103.c
(limited to 'mcu/usb-stm32f103.c')
diff --git a/mcu/usb-stm32f103.c b/mcu/usb-stm32f103.c
new file mode 100644
index 0000000..a709fb6
--- /dev/null
+++ b/mcu/usb-stm32f103.c
@@ -0,0 +1,1127 @@
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "sys-stm32f103.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;
+}
--
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