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introduce 'main' queue between USB receive and UART TX

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In order to handle other USB commands like GET_STATUS, SET_ATR
or GET_STATS, we introduce an intermediary queue.  The USB receive
completion call-back puts the command on that intermediate 'main'
queue.  From that intermediate queue, the are further
dispatched/processed according to their mesage type.
This commit is contained in:
Harald Welte
2016-03-02 13:56:59 +01:00
parent ad43440d93
commit ebb80eda19
2 changed files with 42 additions and 4 deletions
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2
firmware/src_simtrace/host_communication.c
View File

@@ -84,7 +84,7 @@ static void usb_read_cb(uint8_t *arg, uint8_t status, uint32_t transferred,
req_ctx_put(rctx);
return;
}
req_ctx_set_state(rctx, RCTX_S_UART_TX_PENDING);
req_ctx_set_state(rctx, RCTX_S_MAIN_PROCESSING);
llist_add_tail(&rctx->list, queue);
}

44
firmware/src_simtrace/mode_cardemu.c
View File

@@ -3,6 +3,8 @@
#include "iso7816_fidi.h"
#include "utils.h"
#include "linuxlist.h"
#include "req_ctx.h"
#include "cardemu_prot.h"
#define TRACE_ENTRY() TRACE_DEBUG("%s entering\n", __func__)
@@ -12,11 +14,13 @@ static const Pin pins_cardsim[] = PINS_CARDSIM;
static const Pin pins_usim1[] = {PINS_USIM1};
static const Pin pin_usim1_rst = PIN_USIM1_nRST;
static const Pin pin_usim1_vcc = PIN_USIM1_VCC;
static LLIST_HEAD(usb_out_queue_usim1);
#ifdef CARDEMU_SECOND_UART
static const Pin pins_usim2[] = {PINS_USIM1};
static const Pin pin_usim2_rst = PIN_USIM2_nRST;
static const Pin pin_usim2_vcc = PIN_USIM2_VCC;
static LLIST_HEAD(usb_out_queue_usim2);
#endif
static struct card_handle *ch1, *ch2;
@@ -221,6 +225,39 @@ static int llist_count(struct llist_head *head)
static int usb_pending_old = 0;
/* handle a single USB command as received from the USB host */
static void dispatch_usb_command(struct req_ctx *rctx, struct card_handle *ch)
{
struct cardemu_usb_msg_hdr *hdr;
struct llist_head *queue;
hdr = (struct cardemu_usb_msg_hdr *) rctx->data;
switch (hdr->msg_type) {
case CEMU_USB_MSGT_DT_TX_DATA:
queue = card_emu_get_uart_tx_queue(ch);
req_ctx_set_state(rctx, RCTX_S_UART_TX_PENDING);
llist_add_tail(&rctx->list, queue);
card_emu_have_new_uart_tx(ch);
break;
case CEMU_USB_MSGT_DT_SET_ATR:
case CEMU_USB_MSGT_DT_GET_STATS:
case CEMU_USB_MSGT_DT_GET_STATUS:
default:
/* FIXME */
break;
}
}
/* iterate over the queue of incoming USB commands and dispatch/execute
* them */
static void process_any_usb_commands(struct llist_head *main_q, struct card_handle *ch)
{
struct req_ctx *rctx;
llist_for_each_entry(rctx, main_q, list)
dispatch_usb_command(rctx, ch);
}
/* main loop function, called repeatedly */
void mode_cardemu_run(void)
{
@@ -248,10 +285,11 @@ void mode_cardemu_run(void)
}
usb_refill_to_host(queue, PHONE_DATAIN);
queue = card_emu_get_uart_tx_queue(ch1);
/* ensure we can handle incoming USB messages from the
* host */
queue = &usb_out_queue_usim1;
usb_refill_from_host(queue, PHONE_DATAOUT);
if (llist_count(queue))
card_emu_have_new_uart_tx(ch1);
process_any_usb_commands(queue, ch1);
}
#ifdef CARDEMU_SECOND_UART