diff options
Diffstat (limited to 'drivers/usb/serial/ezusb.c')
| -rw-r--r-- | drivers/usb/serial/ezusb.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/usb/serial/ezusb.c b/drivers/usb/serial/ezusb.c index bc3076f2c066..4223d761223d 100644 --- a/drivers/usb/serial/ezusb.c +++ b/drivers/usb/serial/ezusb.c @@ -13,6 +13,8 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/usb.h> +#include <linux/firmware.h> +#include <linux/ihex.h> struct ezusb_fx_type { /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */ @@ -79,3 +81,80 @@ int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit) return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit); } EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset); + +static int ezusb_ihex_firmware_download(struct usb_device *dev, + struct ezusb_fx_type fx, + const char *firmware_path) +{ + int ret = -ENOENT; + const struct firmware *firmware = NULL; + const struct ihex_binrec *record; + + if (request_ihex_firmware(&firmware, firmware_path, + &dev->dev)) { + dev_err(&dev->dev, + "%s - request \"%s\" failed\n", + __func__, firmware_path); + goto out; + } + + ret = ezusb_set_reset(dev, fx.cpucs_reg, 0); + if (ret < 0) + goto out; + + record = (const struct ihex_binrec *)firmware->data; + for (; record; record = ihex_next_binrec(record)) { + if (be32_to_cpu(record->addr) > fx.max_internal_adress) { + ret = ezusb_writememory(dev, be32_to_cpu(record->addr), + (unsigned char *)record->data, + be16_to_cpu(record->len), WRITE_EXT_RAM); + if (ret < 0) { + dev_err(&dev->dev, "%s - ezusb_writememory " + "failed writing internal memory " + "(%d %04X %p %d)\n", __func__, ret, + be32_to_cpu(record->addr), record->data, + be16_to_cpu(record->len)); + goto out; + } + } + } + + ret = ezusb_set_reset(dev, fx.cpucs_reg, 1); + if (ret < 0) + goto out; + record = (const struct ihex_binrec *)firmware->data; + for (; record; record = ihex_next_binrec(record)) { + if (be32_to_cpu(record->addr) <= fx.max_internal_adress) { + ret = ezusb_writememory(dev, be32_to_cpu(record->addr), + (unsigned char *)record->data, + be16_to_cpu(record->len), WRITE_INT_RAM); + if (ret < 0) { + dev_err(&dev->dev, "%s - ezusb_writememory " + "failed writing external memory " + "(%d %04X %p %d)\n", __func__, ret, + be32_to_cpu(record->addr), record->data, + be16_to_cpu(record->len)); + goto out; + } + } + } + ret = ezusb_set_reset(dev, fx.cpucs_reg, 0); +out: + release_firmware(firmware); + return ret; +} + +int ezusb_fx1_ihex_firmware_download(struct usb_device *dev, + const char *firmware_path) +{ + return ezusb_ihex_firmware_download(dev, ezusb_fx1, firmware_path); +} +EXPORT_SYMBOL_GPL(ezusb_fx1_ihex_firmware_download); + +int ezusb_fx2_ihex_firmware_download(struct usb_device *dev, + const char *firmware_path) +{ + return ezusb_ihex_firmware_download(dev, ezusb_fx2, firmware_path); +} +EXPORT_SYMBOL_GPL(ezusb_fx2_ihex_firmware_download); + |