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authorNIIBE Yutaka <gniibe@fsij.org>2016-05-30 14:39:02 +0900
committerNIIBE Yutaka <gniibe@fsij.org>2016-05-30 14:39:02 +0900
commitb90e58f763bd277b7a5285601a34818f44f2b01c (patch)
tree4535e6abc8b77d58215796c240489e7dbf499b44 /mcu/usb-mkl27z.c
parent8209f3875510d1990142a367c8bab6164c2f82cc (diff)
Move CHIP specific things to mcu/
Diffstat (limited to 'mcu/usb-mkl27z.c')
-rw-r--r--mcu/usb-mkl27z.c1034
1 files changed, 1034 insertions, 0 deletions
diff --git a/mcu/usb-mkl27z.c b/mcu/usb-mkl27z.c
new file mode 100644
index 0000000..385e5a8
--- /dev/null
+++ b/mcu/usb-mkl27z.c
@@ -0,0 +1,1034 @@
+/*
+ * usb-mkl27z.c - USB driver for MKL27Z
+ *
+ * Copyright (C) 2016 Flying Stone Technology
+ * Author: NIIBE Yutaka <gniibe@fsij.org>
+ *
+ * This file is a part of Chopstx, a thread library for embedded.
+ *
+ * Chopstx is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chopstx is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As additional permission under GNU GPL version 3 section 7, you may
+ * distribute non-source form of the Program without the copy of the
+ * GNU GPL normally required by section 4, provided you inform the
+ * receipents of GNU GPL by a written offer.
+ *
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "usb_lld.h"
+
+struct endpoint_ctl {
+ uint32_t rx_odd: 1;
+ uint32_t tx_odd: 1;
+};
+static struct endpoint_ctl ep[16];
+
+struct USB_CONF {
+ const uint8_t PERID; /* Peripheral ID register */
+ uint8_t rsvd0[3]; /* */
+ const uint8_t IDCOMP; /* Peripheral ID Complement register */
+ uint8_t rsvd1[3]; /* */
+ const uint8_t REV; /* Peripheral Revision register */
+ uint8_t rsvd2[3]; /* */
+ volatile uint8_t ADDINFO; /* Peripheral Additional Info register */
+};
+static struct USB_CONF *const USB_CONF = (struct USB_CONF *const) 0x40072000;
+
+struct USB_CTRL0 {
+ volatile uint8_t OTGCTL; /* OTG Control register */
+};
+static struct USB_CTRL0 *const USB_CTRL0 = (struct USB_CTRL0 *const)0x4007201c;
+
+struct USB_CTRL1 {
+ volatile uint8_t ISTAT; /* Interrupt Status register */
+ uint8_t rsvd5[3]; /* */
+ volatile uint8_t INTEN; /* Interrupt Enable register */
+ uint8_t rsvd6[3]; /* */
+ volatile uint8_t ERRSTAT; /* Error Interrupt Status register */
+ uint8_t rsvd7[3]; /* */
+ volatile uint8_t ERREN; /* Error Interrupt Enable register */
+ uint8_t rsvd8[3]; /* */
+ volatile uint8_t STAT; /* Status register */
+ uint8_t rsvd9[3]; /* */
+ volatile uint8_t CTL; /* Control register */
+ uint8_t rsvd10[3]; /* */
+ volatile uint8_t ADDR; /* Address register */
+ uint8_t rsvd11[3]; /* */
+ volatile uint8_t BDTPAGE1; /* BDT Page register 1 */
+ uint8_t rsvd12[3]; /* */
+ volatile uint8_t FRMNUML; /* Frame Number register Low */
+ uint8_t rsvd13[3]; /* */
+ volatile uint8_t FRMNUMH; /* Frame Number register High */
+ uint8_t rsvd14[11]; /* */
+ volatile uint8_t BDTPAGE2; /* BDT Page Register 2 */
+ uint8_t rsvd15[3]; /* */
+ volatile uint8_t BDTPAGE3; /* BDT Page Register 3 */
+};
+static struct USB_CTRL1 *const USB_CTRL1 = (struct USB_CTRL1 *const)0x40072080;
+
+/* Interrupt source bits */
+#define USB_IS_STALL (1 << 7)
+#define USB_IS_RESUME (1 << 5)
+#define USB_IS_SLEEP (1 << 4)
+#define USB_IS_TOKDNE (1 << 3)
+#define USB_IS_SOFTOK (1 << 2)
+#define USB_IS_ERROR (1 << 1)
+#define USB_IS_USBRST (1 << 0)
+
+
+struct USB_ENDPT {
+ volatile uint8_t EP; /* Endpoint Control register */
+ uint8_t rsvd17[3];
+};
+static struct USB_ENDPT *const USB_ENDPT = (struct USB_ENDPT *const)0x400720c0;
+
+struct USB_CTRL2 {
+ volatile uint8_t USBCTRL; /* USB Control register */
+ uint8_t rsvd33[3]; /* */
+ volatile uint8_t OBSERVE; /* USB OTG Observe register */
+ uint8_t rsvd34[3]; /* */
+ volatile uint8_t CONTROL; /* USB OTG Control register */
+ uint8_t rsvd35[3]; /* */
+ volatile uint8_t USBTRC0; /* USB Transceiver Control register 0 */
+ uint8_t rsvd36[7]; /* */
+ volatile uint8_t USBFRMADJUST; /* Frame Adjut Register */
+};
+static struct USB_CTRL2 *const USB_CTRL2 = (struct USB_CTRL2 *const)0x40072100;
+
+/* Buffer Descriptor */
+struct BD {
+ volatile uint32_t ctrl;
+ volatile void *buf;
+};
+/*
+ uint32_t rsvd0 : 2;
+ volatile uint32_t STALL: 1;
+ volatile uint32_t DTS: 1;
+
+ volatile uint32_t NINC: 1;
+ volatile uint32_t KEEP: 1;
+ volatile uint32_t DATA01: 1;
+ volatile uint32_t OWN: 1;
+
+ uint32_t rsvd1: 8;
+ volatile uint32_t BC: 10;
+ uint32_t rsvd2: 6;
+*/
+#define TOK_PID(ctrl) ((ctrl >> 2) & 0x0f)
+
+extern uint8_t __usb_bdt__;
+
+static struct BD *const BD_table = (struct BD *const)&__usb_bdt__;
+
+static uint8_t setup[8];
+/* bmRequestType, bRequest */
+/* Value: 2-byte */
+/* Index: 2-byte */
+/* Length: 2-byte */
+
+static void
+kl27z_usb_init (void)
+{
+ int i;
+
+ memset (ep, 0, sizeof (ep));
+ memset (BD_table, 0, 16 * 2 * 2 * sizeof (struct BD));
+
+ /* D+ pull up */
+ USB_CTRL0->OTGCTL = 0x80;
+
+ USB_CTRL1->ERREN = 0xff;
+
+ USB_CTRL1->BDTPAGE1 = ((uint32_t)BD_table) >> 8;
+ USB_CTRL1->BDTPAGE2 = ((uint32_t)BD_table) >> 16;
+ USB_CTRL1->BDTPAGE3 = ((uint32_t)BD_table) >> 24;
+
+ /* Not suspended, Pull-down disabled. */
+ USB_CTRL2->USBCTRL = 0x00;
+ /* DP Pullup in non-OTG device mode. */
+ USB_CTRL2->CONTROL = 0x10;
+
+ /* Disable all endpoints. */
+ for (i = 0; i < 16; i++)
+ USB_ENDPT[i].EP = 0;
+
+ /*
+ * Enable USB FS communication module, clearing all ODD-bits
+ * for BDT.
+ */
+ USB_CTRL1->CTL = 0x03;
+
+ /* ??? How we can ask re-enumeration? Is only hard RESET enough? */
+}
+
+static void
+kl27z_set_daddr (uint8_t daddr)
+{
+ USB_CTRL1->ADDR = daddr;
+}
+
+static void
+kl27z_prepare_ep0_setup (void)
+{
+ /* Endpoint 0, TX=0. */
+ BD_table[ep[0].rx_odd].ctrl = 0x00080088; /* Len=8, OWN=1, DATA01=0, DTS=1 */
+ BD_table[ep[0].rx_odd].buf = setup;
+
+ BD_table[!ep[0].rx_odd].ctrl = 0x0000; /* OWN=0 */
+ BD_table[!ep[0].rx_odd].buf = NULL;
+}
+
+static void
+kl27z_prepare_ep0_in (const void *buf, uint8_t len, int data01)
+{
+ /* Endpoint 0, TX=1 *//* OWN=1, DTS=1 */
+ BD_table[2+ep[0].tx_odd].ctrl = (len << 16) | 0x0088 | (data01 << 6);
+ BD_table[2+ep[0].tx_odd].buf = (void *)buf;
+}
+
+static void
+kl27z_prepare_ep0_out (void *buf, uint8_t len, int data01)
+{
+ /* Endpoint 0, TX=0 *//* OWN=1, DTS=1 */
+ BD_table[ep[0].rx_odd].ctrl = (len << 16) | 0x0088 | (data01 << 6);
+ BD_table[ep[0].rx_odd].buf = buf;
+}
+
+static int
+kl27z_ep_is_disabled (uint8_t n)
+{
+ return (USB_ENDPT[n].EP == 0);
+}
+
+static int
+kl27z_ep_is_stall (uint8_t n)
+{
+ return (USB_ENDPT[n].EP & 0x02) >> 1;
+}
+
+static void
+kl27z_ep_stall (uint8_t n)
+{
+ USB_ENDPT[n].EP |= 0x02;
+}
+
+static void
+kl27z_ep_clear_stall (uint8_t n)
+{
+ USB_ENDPT[n].EP &= ~0x02;
+}
+
+static void
+kl27z_ep_clear_dtog (int rx, uint8_t n)
+{
+ uint32_t config;
+
+ if (!kl27z_ep_is_stall (n))
+ /* Just in case, when the endpoint is active */
+ kl27z_ep_stall (n);
+
+ if (rx)
+ {
+ config = BD_table[4*n+ep[n].rx_odd].ctrl;
+
+ BD_table[4*n+!ep[n].rx_odd].ctrl &= ~(1 << 6);
+ if ((config & 0x0080)) /* OWN already? */
+ {
+ /*
+ * How to update BDT entry which is owned by USBFS seems to
+ * be not clearly documented. It would be just OK to update
+ * it as long as the endpoint is stalled (BDT entry is
+ * actually not in use). We write 0 at first and then write
+ * value with OWN, to avoid possible failure.
+ */
+ BD_table[4*n+ep[n].rx_odd].ctrl = 0;
+ BD_table[4*n+ep[n].rx_odd].ctrl = (config & ~(1 << 6));
+ }
+ }
+ else
+ {
+ config = BD_table[4*n+2+ep[n].tx_odd].ctrl;
+
+ BD_table[4*n+2+!ep[n].tx_odd].ctrl &= ~(1 << 6);
+ if ((config & 0x0080)) /* OWN already? */
+ {
+ BD_table[4*n+2+ep[n].tx_odd].ctrl = 0;
+ BD_table[4*n+2+ep[n].tx_odd].ctrl = (config & ~(1 << 6));
+ }
+ }
+
+ kl27z_ep_clear_stall (n);
+}
+
+#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 */
+};
+
+
+enum FEATURE_SELECTOR {
+ ENDPOINT_STALL,
+ DEVICE_REMOTE_WAKEUP
+};
+
+
+struct data_ctl {
+ uint8_t *addr;
+ uint16_t len;
+ uint8_t require_zlp;
+};
+
+/* The state machine states of a control pipe */
+enum {
+ WAIT_SETUP,
+ IN_DATA,
+ OUT_DATA,
+ LAST_IN_DATA,
+ WAIT_STATUS_IN,
+ WAIT_STATUS_OUT,
+ STALLED,
+ PAUSE
+};
+
+struct device_ctl {
+ /* control pipe state */
+ uint8_t state;
+
+ uint32_t tkdone;
+ uint32_t reset;
+ uint32_t error;
+ uint32_t stall;
+
+ uint32_t send;
+ uint32_t recv;
+
+ /* Device specific settings */
+ uint8_t configuration;
+ uint8_t feature;
+};
+
+static struct device_ctl device_ctl;
+static struct data_ctl data_ctl;
+
+static struct device_ctl *const dev_p = &device_ctl;
+static struct data_ctl *const data_p = &data_ctl;
+
+static void handle_transaction (uint8_t stat);
+
+void
+usb_lld_stall (int n)
+{
+ kl27z_ep_stall (n);
+}
+
+
+void
+usb_lld_init (uint8_t feature)
+{
+ dev_p->state = WAIT_SETUP;
+ dev_p->tkdone = 0;
+ dev_p->reset = 0;
+ dev_p->error = 0;
+ dev_p->stall = 0;
+
+ usb_lld_set_configuration (0);
+ dev_p->feature = feature;
+
+ kl27z_set_daddr (0);
+ kl27z_usb_init ();
+
+ /* Enable the endpoint 0. */
+ USB_ENDPT[0].EP = 0x0d;
+
+ /* Clear Interrupt Status Register, and enable interrupt for USB */
+ USB_CTRL1->ISTAT = 0xff; /* All clear */
+
+ USB_CTRL1->INTEN = USB_IS_STALL | USB_IS_TOKDNE
+ | USB_IS_ERROR | USB_IS_USBRST;
+}
+
+void
+usb_interrupt_handler (void)
+{
+ uint8_t istat_value = USB_CTRL1->ISTAT;
+ uint8_t stat = USB_CTRL1->STAT;
+
+ if ((istat_value & USB_IS_USBRST))
+ {
+ USB_CTRL1->ISTAT = USB_IS_USBRST;
+ usb_cb_device_reset ();
+ dev_p->reset++;
+ }
+ else if ((istat_value & USB_IS_ERROR))
+ { /* Clear Errors. */
+ USB_CTRL1->ERRSTAT = USB_CTRL1->ERRSTAT;
+ USB_CTRL1->ISTAT = USB_IS_ERROR;
+ /*reset???*/
+ dev_p->error++;
+ }
+ else if ((istat_value & USB_IS_TOKDNE))
+ {
+ handle_transaction (stat);
+ dev_p->tkdone++;
+ }
+ else if ((istat_value & USB_IS_STALL))
+ {
+ /* ??? stat includes ep_num in this case ???: No, it doesn't */
+
+ if (kl27z_ep_is_stall (0))
+ { /* It's endpoint 0, recover from erorr. */
+ dev_p->state = WAIT_SETUP;
+ kl27z_ep_clear_stall (0);
+ kl27z_prepare_ep0_setup ();
+ }
+
+ USB_CTRL1->ISTAT = USB_IS_STALL;
+ dev_p->stall++;
+ }
+}
+
+#define DATA0 0
+#define DATA1 1
+
+static void
+handle_datastage_out (uint8_t stat)
+{
+ int odd = (stat >> 2)&1;
+ int data01 = !((BD_table[odd].ctrl >> 6)&1);
+ uint32_t len = (BD_table[odd].ctrl >> 16)&0x3ff;
+
+ data_p->len -= len;
+ data_p->addr += len;
+
+ len = data_p->len;
+ if (len > USB_MAX_PACKET_SIZE)
+ len = USB_MAX_PACKET_SIZE;
+
+ if (data_p->len == 0)
+ {
+ /* No more data to receive, proceed to send acknowledge for IN. */
+ dev_p->state = WAIT_STATUS_IN;
+ kl27z_prepare_ep0_in (setup, 0, DATA1);
+ }
+ else
+ {
+ dev_p->state = OUT_DATA;
+ kl27z_prepare_ep0_out (data_p->addr, len, data01);
+ }
+}
+
+static void
+handle_datastage_in (uint8_t stat)
+{
+ int odd = (stat >> 2)&1;
+ int data01 = !((BD_table[2+odd].ctrl >> 6)&1);
+ 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 */
+ kl27z_prepare_ep0_in (setup, 0, data01);
+ }
+ else
+ {
+ /* No more data to send, proceed to receive OUT acknowledge. */
+ dev_p->state = WAIT_STATUS_OUT;
+ kl27z_prepare_ep0_out (setup, 8, DATA1);
+ }
+
+ return;
+ }
+
+ dev_p->state = (data_p->len <= len) ? LAST_IN_DATA : IN_DATA;
+
+ if (len > data_p->len)
+ len = data_p->len;
+
+ kl27z_prepare_ep0_in (data_p->addr, len, data01);
+ data_p->len -= len;
+ data_p->addr += len;
+}
+
+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->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->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 n = (arg->index & 0x0f);
+
+ if ((arg->index & 0x70) || n == ENDP0)
+ return USB_UNSUPPORT;
+
+ if (kl27z_ep_is_disabled (n))
+ return USB_UNSUPPORT;
+
+ status_info = kl27z_ep_is_stall (n);
+ 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->feature &= ~(1 << 5);
+ return USB_SUCCESS;
+ }
+ }
+ else if (rcp == ENDPOINT_RECIPIENT)
+ {
+ uint8_t n = (arg->index & 0x0f);
+
+ if (dev_p->configuration == 0)
+ return USB_UNSUPPORT;
+
+ if (arg->len != 0 || (arg->index >> 8) != 0
+ || arg->value != ENDPOINT_STALL || n == ENDP0)
+ return USB_UNSUPPORT;
+
+ if (kl27z_ep_is_disabled (n))
+ return USB_UNSUPPORT;
+
+ kl27z_ep_clear_dtog ((arg->index & 0x80) == 0, n);
+
+ // 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->feature |= 1 << 5;
+ // event??
+ return USB_SUCCESS;
+ }
+ }
+ else if (rcp == ENDPOINT_RECIPIENT)
+ {
+ uint8_t n = (arg->index & 0x0f);
+
+ if (dev_p->configuration == 0)
+ return USB_UNSUPPORT;
+
+ if (arg->len != 0 || (arg->index >> 8) != 0
+ || arg->value != 0 || n == ENDP0)
+ return USB_UNSUPPORT;
+
+ if (kl27z_ep_is_disabled (n))
+ return USB_UNSUPPORT;
+
+ kl27z_ep_stall (n);
+
+ // 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->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;
+
+ (void)arg;
+ if (USB_SETUP_SET (req))
+ return USB_UNSUPPORT;
+
+ if (rcp == DEVICE_RECIPIENT)
+ return usb_lld_reply_request (&dev_p->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->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->configuration == 0)
+ return USB_UNSUPPORT;
+
+ return usb_cb_interface (USB_SET_INTERFACE, arg);
+}
+
+
+static void
+handle_setup0 (void)
+{
+ struct req_args *arg = (struct req_args *)&setup[2];
+ int r = USB_UNSUPPORT;
+ HANDLER handler;
+
+ data_p->addr = NULL;
+ data_p->len = 0;
+ data_p->require_zlp = 0;
+
+ if ((setup[0] & REQUEST_TYPE) == STANDARD_REQUEST)
+ {
+ if (setup[1] < TOTAL_REQUEST)
+ {
+ switch (setup[1])
+ {
+ 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) (setup[0], arg);
+ }
+ }
+ else
+ r = usb_cb_setup (setup[0], setup[1], arg);
+
+ if (r != USB_SUCCESS)
+ dev_p->state = STALLED;
+ else if (USB_SETUP_SET (setup[0]))
+ {
+ if (arg->len == 0)
+ {
+ /* Zero length packet for ACK. */
+ kl27z_prepare_ep0_in (setup, 0, DATA1);
+ dev_p->state = WAIT_STATUS_IN;
+ }
+ }
+}
+
+static void
+handle_in0 (uint8_t stat)
+{
+ if (dev_p->state == IN_DATA || dev_p->state == LAST_IN_DATA)
+ handle_datastage_in (stat);
+ else if (dev_p->state == WAIT_STATUS_IN)
+ { /* Control WRITE transfer done successfully. */
+ uint16_t value = (setup[3]<<8) | setup[2];
+
+ if ((setup[1] == SET_ADDRESS) &&
+ ((setup[0] & (REQUEST_TYPE | RECIPIENT))
+ == (STANDARD_REQUEST | DEVICE_RECIPIENT)))
+ {
+ kl27z_set_daddr (value);
+ usb_cb_handle_event (USB_EVENT_ADDRESS, value);
+ ep[0].rx_odd = 0;
+ }
+ else
+ usb_cb_ctrl_write_finish (setup[0], setup[1],
+ (struct req_args *)&setup[2]);
+
+ dev_p->state = WAIT_SETUP;
+ kl27z_prepare_ep0_setup ();
+ }
+ else
+ dev_p->state = STALLED;
+}
+
+static void
+handle_out0 (uint8_t stat)
+{
+ if (dev_p->state == IN_DATA || dev_p->state == LAST_IN_DATA)
+ /* Host aborts the control READ transfer before finish. */
+ dev_p->state = STALLED;
+ else if (dev_p->state == OUT_DATA)
+ /* It's normal control WRITE transfer. */
+ handle_datastage_out (stat);
+ else if (dev_p->state == WAIT_STATUS_OUT)
+ { /* Control READ transfer done successfully. */
+ dev_p->state = WAIT_SETUP;
+ kl27z_prepare_ep0_setup ();
+ }
+ else
+ dev_p->state = STALLED;
+}
+
+static void
+handle_transaction (uint8_t stat)
+{
+ int odd = (stat >> 2)&1;
+ uint8_t ep_num = (stat >> 4);
+
+ if (ep_num == 0)
+ {
+ if ((stat & 0x08) == 0)
+ {
+ ep[0].rx_odd ^= 1;
+ if (TOK_PID (BD_table[odd].ctrl) == 0x0d)
+ {
+ handle_setup0 ();
+ USB_CTRL1->ISTAT = USB_IS_TOKDNE;
+ USB_CTRL1->CTL = 0x01; /* Clear TXSUSPENDTOKENBUSY. */
+ }
+ else
+ {
+ USB_CTRL1->ISTAT = USB_IS_TOKDNE;
+ handle_out0 (stat);
+ }
+ }
+ else
+ {
+ ep[0].tx_odd ^= 1;
+ USB_CTRL1->ISTAT = USB_IS_TOKDNE;
+ handle_in0 (stat);
+ }
+
+ if (dev_p->state == STALLED)
+ kl27z_ep_stall (0);
+ }
+ else
+ {
+ if ((stat & 0x08) == 0)
+ {
+ dev_p->recv++;
+ ep[ep_num].rx_odd ^= 1;
+ usb_cb_rx_ready (ep_num);
+ }
+ else
+ {
+ /* XXX: Can be NAK. Check BDT if it's NAK or not. */
+
+ dev_p->send++;
+ ep[ep_num].tx_odd ^= 1;
+ usb_cb_tx_done (ep_num);
+ }
+
+ USB_CTRL1->ISTAT = USB_IS_TOKDNE;
+ }
+}
+
+void
+usb_lld_reset (uint8_t feature)
+{
+ dev_p->feature = feature;
+ usb_lld_set_configuration (0);
+
+ /* Reset USB */
+ USB_CTRL2->USBTRC0 = 0xc0;
+
+ USB_CTRL1->CTL = 0x00; /* Disable USB FS communication module */
+
+ dev_p->state = WAIT_SETUP;
+ dev_p->tkdone = 0;
+ dev_p->error = 0;
+ dev_p->stall = 0;
+
+ kl27z_set_daddr (0);
+ kl27z_usb_init ();
+
+ /* Clear Interrupt Status Register, and enable interrupt for USB */
+ USB_CTRL1->ISTAT = 0xff; /* All clear */
+
+ USB_CTRL1->INTEN = USB_IS_STALL | USB_IS_TOKDNE
+ | USB_IS_ERROR | USB_IS_USBRST;
+}
+
+void
+usb_lld_setup_endpoint (int n, int rx_en, int tx_en)
+{
+ if (n == 0)
+ {
+ /* Enable the endpoint 0. */
+ USB_ENDPT[0].EP = 0x0d;
+ kl27z_prepare_ep0_setup ();
+ }
+ else
+ {
+ /* Enable the endpoint. */
+ USB_ENDPT[n].EP = (rx_en << 3)|(tx_en << 2)|0x11;
+
+ /* Configure BDT entry so that it starts with DATA0. */
+
+ /* RX */
+ BD_table[4*n+ep[n].rx_odd].ctrl = 0x0000;
+ BD_table[4*n+ep[n].rx_odd].buf = NULL;
+ BD_table[4*n+!ep[n].rx_odd].ctrl = 0x0040;
+ BD_table[4*n+!ep[n].rx_odd].buf = NULL;
+
+ /* TX */
+ BD_table[4*n+2+ep[n].tx_odd].ctrl = 0x0000;
+ BD_table[4*n+2+ep[n].tx_odd].buf = NULL;
+ BD_table[4*n+2+!ep[n].tx_odd].ctrl = 0x0040;
+ BD_table[4*n+2+!ep[n].tx_odd].buf = NULL;
+ }
+}
+
+
+void
+usb_lld_set_configuration (uint8_t config)
+{
+ dev_p->configuration = config;
+}
+
+uint8_t
+usb_lld_current_configuration (void)
+{
+ return dev_p->configuration;
+}
+
+void
+usb_lld_set_data_to_recv (void *p, size_t len)
+{
+ data_p->addr = (uint8_t *)p;
+ data_p->len = len;
+ if (len > USB_MAX_PACKET_SIZE)
+ len = USB_MAX_PACKET_SIZE;
+
+ kl27z_prepare_ep0_out (p, len, DATA1);
+ dev_p->state = OUT_DATA;
+}
+
+/*
+ * 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 *a)
+{
+ uint32_t len_asked = a->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;
+
+ data_p->require_zlp = (data_p->len != 0
+ && (data_p->len % USB_MAX_PACKET_SIZE) == 0);
+
+ 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)
+ kl27z_prepare_ep0_in (data_p->addr, len, DATA1);
+
+ data_p->len -= len;
+ data_p->addr += len;
+
+ return USB_SUCCESS;
+}
+
+void
+usb_lld_rx_enable (int n, void *buf, size_t len)
+{
+ int data01 = !((BD_table[4*n+!ep[n].rx_odd].ctrl >> 6)&1);
+
+ BD_table[4*n+ep[n].rx_odd].ctrl = (len << 16) | 0x0088 | (data01 << 6);
+ BD_table[4*n+ep[n].rx_odd].buf = buf;
+}
+
+int
+usb_lld_rx_data_len (int n)
+{
+ return (BD_table[4*n+!ep[n].rx_odd].ctrl >> 16)&0x3ff;
+}
+
+
+void
+usb_lld_tx_enable (uint8_t n, const void *buf, size_t len)
+{
+ int data01 = !((BD_table[4*n+2+!ep[n].tx_odd].ctrl >> 6)&1);
+
+ BD_table[4*n+2+ep[n].tx_odd].ctrl = (len << 16) | 0x0088 | (data01 << 6);
+ BD_table[4*n+2+ep[n].tx_odd].buf = (void *)buf;
+}
+
+int
+usb_lld_tx_result (int ep_num)
+{
+ (void)ep_num;
+ return 0; /* XXX: return -1 when NAK */
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-07 02:35:50 +0000