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authorSimon Glass <sjg@chromium.org>2015-06-28 13:31:19 +0000
committerStefan Tauner <stefan.tauner@alumni.tuwien.ac.at>2015-06-28 13:31:19 +0000
commit25e9f40e21e715e4ee6183a42c8521406f91b258 (patch)
tree887b1ab921ef9ca47f8197eb394caf18876f4cb6
parent0a5f6e43d15c50409eb49369895ba2a56a173d47 (diff)
downloadast2050-flashrom-25e9f40e21e715e4ee6183a42c8521406f91b258.zip
ast2050-flashrom-25e9f40e21e715e4ee6183a42c8521406f91b258.tar.gz
dediprog: Invert the LED polarity in the code
Previously we have used low-active macros (because the hardware and old protocol were so too) and set every single LED explicitly although we only used a limited number of combinations. Using an enumeration for commonly used values instead makes things easier. Based on the following chromiumos change: Change-Id: Ie481a583e623cdc45e3649a4db69b15570f65a7b Corresponding to flashrom svn r1894. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: David Hendricks <dhendrix@chromium.org>
-rw-r--r--dediprog.c91
1 files changed, 42 insertions, 49 deletions
diff --git a/dediprog.c b/dediprog.c
index 851dbae..f92bb48 100644
--- a/dediprog.c
+++ b/dediprog.c
@@ -45,6 +45,15 @@ static int dediprog_endpoint;
#define DEDI_SPI_CMD_PAGEWRITE 0x1
#define DEDI_SPI_CMD_AAIWRITE 0x4
+enum dediprog_leds {
+ LED_INVALID = -1,
+ LED_NONE = 0,
+ LED_PASS = 1 << 0,
+ LED_BUSY = 1 << 1,
+ LED_ERROR = 1 << 2,
+ LED_ALL = 7,
+};
+
#if 0
/* Might be useful for other pieces of code as well. */
static void print_hex(void *buf, size_t len)
@@ -77,24 +86,11 @@ static struct usb_device *get_device_by_vid_pid(uint16_t vid, uint16_t pid, unsi
//int usb_control_msg(usb_dev_handle *dev, int requesttype, int request, int value, int index, char *bytes, int size, int timeout);
-/* Set/clear LEDs on dediprog */
-#define PASS_ON (0 << 0)
-#define PASS_OFF (1 << 0)
-#define BUSY_ON (0 << 1)
-#define BUSY_OFF (1 << 1)
-#define ERROR_ON (0 << 2)
-#define ERROR_OFF (1 << 2)
-static int current_led_status = -1;
-
+/* This function sets the GPIOs connected to the LEDs as well as IO1-IO4. */
static int dediprog_set_leds(int leds)
{
- int ret, target_leds;
-
- if (leds < 0 || leds > 7)
- leds = 0; // Bogus value, enable all LEDs
-
- if (leds == current_led_status)
- return 0;
+ if (leds < LED_NONE || leds > LED_ALL)
+ leds = LED_ALL;
/* Older Dediprogs with 2.x.x and 3.x.x firmware only had
* two LEDs, and they were reversed. So map them around if
@@ -103,23 +99,21 @@ static int dediprog_set_leds(int leds)
* bit 2 == 0: green light is on.
* bit 0 == 0: red light is on.
*/
+ int target_leds;
if (dediprog_firmwareversion < FIRMWARE_VERSION(5,0,0)) {
- target_leds = ((leds & ERROR_OFF) >> 2) |
- ((leds & PASS_OFF) << 2);
+ target_leds = ((leds & LED_ERROR) >> 2) |
+ ((leds & LED_PASS) << 2);
} else {
target_leds = leds;
}
- ret = usb_control_msg(dediprog_handle, 0x42, 0x07, 0x09, target_leds,
- NULL, 0x0, DEFAULT_TIMEOUT);
+ target_leds ^= 7;
+ int ret = usb_control_msg(dediprog_handle, 0x42, 0x07, 0x09, target_leds, NULL, 0x0, DEFAULT_TIMEOUT);
if (ret != 0x0) {
- msg_perr("Command Set LED 0x%x failed (%s)!\n",
- leds, usb_strerror());
+ msg_perr("Command Set LED 0x%x failed (%s)!\n", leds, usb_strerror());
return 1;
}
- current_led_status = leds;
-
return 0;
}
@@ -271,26 +265,22 @@ static int dediprog_spi_read(struct flashctx *flash, uint8_t *buf,
unsigned int residue = start % chunksize ? chunksize - start % chunksize : 0;
unsigned int bulklen;
- dediprog_set_leds(PASS_OFF|BUSY_ON|ERROR_OFF);
+ dediprog_set_leds(LED_BUSY);
if (residue) {
msg_pdbg("Slow read for partial block from 0x%x, length 0x%x\n",
start, residue);
ret = spi_read_chunked(flash, buf, start, residue, 16);
- if (ret) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
- return ret;
- }
+ if (ret)
+ goto err;
}
/* Round down. */
bulklen = (len - residue) / chunksize * chunksize;
ret = dediprog_spi_bulk_read(flash, buf + residue, start + residue,
bulklen);
- if (ret) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
- return ret;
- }
+ if (ret)
+ goto err;
len -= residue + bulklen;
if (len) {
@@ -298,14 +288,15 @@ static int dediprog_spi_read(struct flashctx *flash, uint8_t *buf,
start, len);
ret = spi_read_chunked(flash, buf + residue + bulklen,
start + residue + bulklen, len, 16);
- if (ret) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
- return ret;
- }
+ if (ret)
+ goto err;
}
- dediprog_set_leds(PASS_ON|BUSY_OFF|ERROR_OFF);
+ dediprog_set_leds(LED_PASS);
return 0;
+err:
+ dediprog_set_leds(LED_ERROR);
+ return ret;
}
/* Bulk write interface, will write multiple chunksize byte chunks aligned to chunksize bytes.
@@ -383,7 +374,7 @@ static int dediprog_spi_write(struct flashctx *flash, const uint8_t *buf,
unsigned int residue = start % chunksize ? chunksize - start % chunksize : 0;
unsigned int bulklen;
- dediprog_set_leds(PASS_OFF|BUSY_ON|ERROR_OFF);
+ dediprog_set_leds(LED_BUSY);
if (chunksize != 256) {
msg_pdbg("Page sizes other than 256 bytes are unsupported as "
@@ -398,7 +389,7 @@ static int dediprog_spi_write(struct flashctx *flash, const uint8_t *buf,
/* No idea about the real limit. Maybe 12, maybe more. */
ret = spi_write_chunked(flash, buf, start, residue, 12);
if (ret) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
+ dediprog_set_leds(LED_ERROR);
return ret;
}
}
@@ -407,7 +398,7 @@ static int dediprog_spi_write(struct flashctx *flash, const uint8_t *buf,
bulklen = (len - residue) / chunksize * chunksize;
ret = dediprog_spi_bulk_write(flash, buf + residue, chunksize, start + residue, bulklen, dedi_spi_cmd);
if (ret) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
+ dediprog_set_leds(LED_ERROR);
return ret;
}
@@ -418,12 +409,12 @@ static int dediprog_spi_write(struct flashctx *flash, const uint8_t *buf,
ret = spi_write_chunked(flash, buf + residue + bulklen,
start + residue + bulklen, len, 12);
if (ret) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
+ dediprog_set_leds(LED_ERROR);
return ret;
}
}
- dediprog_set_leds(PASS_ON|BUSY_OFF|ERROR_OFF);
+ dediprog_set_leds(LED_PASS);
return 0;
}
@@ -918,23 +909,25 @@ int dediprog_init(void)
if (register_shutdown(dediprog_shutdown, NULL))
return 1;
- dediprog_set_leds(PASS_ON|BUSY_ON|ERROR_ON);
-
/* Perform basic setup. */
if (dediprog_setup(target)) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
return 1;
}
+ /* Set all possible LEDs as soon as possible to indicate activity.
+ * Because knowing the firmware version is required to set the LEDs correctly we need to this after
+ * dediprog_setup() has queried the device and set dediprog_firmwareversion. */
+ dediprog_set_leds(LED_ALL);
+
/* After setting voltage and speed, perform setup again. */
if (dediprog_set_spi_voltage(0) || dediprog_set_spi_speed(spispeed_idx) || dediprog_setup(target)) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
+ dediprog_set_leds(LED_ERROR);
return 1;
}
/* URB 11. Command Set SPI Voltage. */
if (dediprog_set_spi_voltage(millivolt)) {
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_ON);
+ dediprog_set_leds(LED_ERROR);
return 1;
}
@@ -946,7 +939,7 @@ int dediprog_init(void)
dediprog_do_stuff();
#endif
- dediprog_set_leds(PASS_OFF|BUSY_OFF|ERROR_OFF);
+ dediprog_set_leds(LED_NONE);
return 0;
}
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