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Diffstat (limited to 'driver/mcdp28x0.c')
-rw-r--r--driver/mcdp28x0.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/driver/mcdp28x0.c b/driver/mcdp28x0.c
deleted file mode 100644
index bf44a6eaf8..0000000000
--- a/driver/mcdp28x0.c
+++ /dev/null
@@ -1,314 +0,0 @@
-/* Copyright 2014 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- * Megachips DisplayPort to HDMI protocol converter / level shifter driver.
- */
-
-#include "config.h"
-#include "console.h"
-#include "common.h"
-#include "ec_commands.h"
-#include "mcdp28x0.h"
-#include "queue.h"
-#include "queue_policies.h"
-#include "timer.h"
-#include "usart-stm32f0.h"
-#include "util.h"
-
-#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
-
-static uint8_t mcdp_inbuf[MCDP_INBUF_MAX];
-
-#undef MCDP_DEBUG
-
-#ifdef MCDP_DEBUG
-static inline void print_buffer(uint8_t *buf, int cnt)
-{
- int i;
- CPRINTF("buf:");
- for (i = 0; i < cnt; i++) {
- if (i && !(i % 4))
- CPRINTF("\n ");
- CPRINTF("[%02d]0x%02x ", i, buf[i]);
- }
- CPRINTF("\n");
-}
-#else
-static inline void print_buffer(uint8_t *buf, int cnt) {}
-#endif
-
-static struct usart_config const usart_mcdp;
-
-struct queue const usart_mcdp_rx_queue = QUEUE_DIRECT(MCDP_INBUF_MAX,
- uint8_t,
- usart_mcdp.producer,
- null_consumer);
-struct queue const usart_mcdp_tx_queue = QUEUE_DIRECT(MCDP_OUTBUF_MAX,
- uint8_t,
- null_producer,
- usart_mcdp.consumer);
-
-static struct usart_config const usart_mcdp = USART_CONFIG(CONFIG_MCDP28X0,
- usart_rx_interrupt,
- usart_tx_interrupt,
- 115200,
- 0,
- usart_mcdp_rx_queue,
- usart_mcdp_tx_queue);
-
-/**
- * Compute checksum.
- *
- * @seed initial value of checksum.
- * @msg message bytes to compute checksum on.
- * @cnt count of message bytes.
- * @return partial checksum.
- */
-static uint8_t compute_checksum(uint8_t seed, const uint8_t *msg, int cnt)
-{
- int i;
- uint8_t chksum = seed;
-
- for (i = 0; i < cnt; i++)
- chksum += msg[i];
- return ~chksum + 1;
-}
-
-/**
- * transmit message over serial
- *
- * Packet consists of:
- * msg[0] == length of entire packet
- * msg[1] == 1st message byte (typically command)
- * msg[cnt+1] == last message byte
- * msg[cnt+2] == checksum
- *
- * @msg message bytes
- * @cnt count of message bytes
- * @return zero if success, error code otherwise
- */
-static int tx_serial(const uint8_t *msg, int cnt)
-{
- uint8_t out = cnt + 2;
- /* 1st byte (not in msg) is always cnt + 2, so seed chksum with that */
- uint8_t chksum = compute_checksum(cnt + 2, msg, cnt);
-
- if (queue_add_unit(&usart_mcdp_tx_queue, &out) != 1)
- return MCDP_ERROR_TX_CNT;
-
- if (queue_add_units(&usart_mcdp_tx_queue, msg, cnt) != cnt)
- return MCDP_ERROR_TX_BODY;
-
- print_buffer((uint8_t *)msg, cnt);
-
- if (queue_add_unit(&usart_mcdp_tx_queue, &chksum) != 1)
- return MCDP_ERROR_TX_CHKSUM;
-
- return MCDP_SUCCESS;
-}
-
-/**
- * receive message over serial
- *
- * While definitive documentation is lacking its believed the following receive
- * packet is always true.
- *
- * Packet consists of:
- * msg[0] == length of entire packet
- * msg[1] == 1st message byte (typically command)
- * msg[cnt+2] == last message byte
- * msg[cnt+3] == checksum
- *
- * @msg pointer to buffer to read message into
- * @cnt count of message bytes
- * @return zero if success, error code otherwise
- */
-static int rx_serial(uint8_t *msg, int cnt)
-{
- size_t read;
- int retry = 2;
-
- read = queue_remove_units(&usart_mcdp_rx_queue, msg, cnt);
- while ((read < cnt) && retry) {
- usleep(100*MSEC);
- read += queue_remove_units(&usart_mcdp_rx_queue, msg + read,
- cnt - read);
- retry--;
- }
-
- print_buffer(msg, cnt);
-
- /* Some response sizes are dynamic so shrink cnt accordingly. */
- if (cnt > msg[0])
- cnt = msg[0];
-
- if (msg[cnt-1] != compute_checksum(0, msg, cnt-1))
- return MCDP_ERROR_CHKSUM;
-
- if (read != cnt) {
- CPRINTF("rx_serial: read bytes %d != %d cnt\n", read, cnt);
- return MCDP_ERROR_RX_BYTES;
- }
-
- return MCDP_SUCCESS;
-}
-
-static int rx_serial_ack(void)
-{
- int rv = rx_serial(mcdp_inbuf, 3);
- if (rv)
- return rv;
-
- if (mcdp_inbuf[1] != MCDP_CMD_ACK)
- return MCDP_ERROR_RX_ACK;
-
- return rv;
-}
-
-void mcdp_enable(void)
-{
- usart_init(&usart_mcdp);
-}
-
-void mcdp_disable(void)
-{
- usart_shutdown(&usart_mcdp);
-}
-
-int mcdp_get_info(struct mcdp_info *info)
-{
- const uint8_t msg[2] = {MCDP_CMD_APPSTEST, 0x28};
- int rv = tx_serial(msg, sizeof(msg));
-
- if (rv)
- return rv;
-
- rv = rx_serial_ack();
- if (rv)
- return rv;
-
- /* chksum is unreliable ... don't check */
- rx_serial(mcdp_inbuf, MCDP_RSP_LEN(MCDP_LEN_GETINFO));
-
- memcpy(info, &mcdp_inbuf[2], MCDP_LEN_GETINFO);
-
- return rv;
-}
-
-#ifdef CONFIG_CMD_MCDP
-static int mcdp_get_dev_id(char *dev, uint8_t dev_id, int dev_cnt)
-{
- uint8_t msg[2];
- int rv;
- msg[0] = MCDP_CMD_GETDEVID;
- msg[1] = dev_id;
-
- rv = tx_serial(msg, sizeof(msg));
- if (rv)
- return rv;
-
- rv = rx_serial(mcdp_inbuf, sizeof(mcdp_inbuf));
- if (rv)
- return rv;
-
- memcpy(dev, &mcdp_inbuf[2], mcdp_inbuf[0] - 3);
- dev[mcdp_inbuf[0] - 3] = '\0';
- return EC_SUCCESS;
-}
-
-static int mcdp_appstest(uint8_t cmd, int paramc, char **paramv)
-{
- uint8_t msg[6];
- char *e;
- int i;
- int rv = MCDP_SUCCESS;
-
- /* setup any appstest params */
- msg[0] = MCDP_CMD_APPSTESTPARAM;
- for (i = 0; i < paramc; i++) {
- uint32_t param = strtoi(paramv[i], &e, 10);
- if (*e)
- return EC_ERROR_PARAM1;
- msg[1] = i + 1;
- msg[2] = (param >> 24) & 0xff;
- msg[3] = (param >> 16) & 0xff;
- msg[4] = (param >> 8) & 0xff;
- msg[5] = (param >> 0) & 0xff;
- rv = tx_serial(msg, sizeof(msg));
- if (rv)
- return rv;
-
- rv = rx_serial_ack();
- if (rv)
- return rv;
- }
-
- msg[0] = MCDP_CMD_APPSTEST;
- msg[1] = cmd;
- rv = tx_serial(msg, 2);
- if (rv)
- return rv;
-
- rv = rx_serial_ack();
- if (rv)
- return rv;
-
- /* magic */
- rx_serial(mcdp_inbuf, sizeof(mcdp_inbuf));
- rx_serial(mcdp_inbuf, sizeof(mcdp_inbuf));
-
- return EC_SUCCESS;
-}
-
-int command_mcdp(int argc, char **argv)
-{
- int rv = EC_SUCCESS;
- char *e;
-
- if (argc < 2)
- return EC_ERROR_PARAM_COUNT;
-
- mcdp_enable();
- if (!strncasecmp(argv[1], "info", 4)) {
- struct mcdp_info info;
- rv = mcdp_get_info(&info);
- if (!rv)
- ccprintf("family:%04x chipid:%04x irom:%d.%d.%d "
- "fw:%d.%d.%d\n",
- MCDP_FAMILY(info.family),
- MCDP_CHIPID(info.chipid),
- info.irom.major, info.irom.minor,
- info.irom.build,
- info.fw.major, info.fw.minor, info.fw.build);
- } else if (!strncasecmp(argv[1], "devid", 4)) {
- uint8_t dev_id = strtoi(argv[2], &e, 10);
- char dev[32];
- if (*e)
- return EC_ERROR_PARAM2;
- else
- rv = mcdp_get_dev_id(dev, dev_id, 32);
- if (!rv)
- ccprintf("devid[%d] = %s\n", dev_id, dev);
- } else if (!strncasecmp(argv[1], "appstest", 4)) {
- uint8_t cmd = strtoi(argv[2], &e, 10);
- if (*e)
- return EC_ERROR_PARAM2;
- else
- rv = mcdp_appstest(cmd, argc - 3, &argv[3]);
- if (!rv)
- ccprintf("appstest[%d] completed\n", cmd);
- } else {
- return EC_ERROR_PARAM1;
- }
-
- mcdp_disable();
- if (rv)
- ccprintf("mcdp_error:%d\n", rv);
-
- return EC_SUCCESS;
-}
-DECLARE_CONSOLE_COMMAND(mcdp, command_mcdp,
- "info|devid <id>|appstest <cmd> [<params>]",
- "USB PD");
-#endif /* CONFIG_CMD_MCDP */
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