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Functions | |
| int | fpga_io_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
| int | fpga_io_open (void) |
| int | fpga_io_close (void) |
| ssize_t | fpga_io_write (struct file *file, const char *buf, size_t count, loff_t *off) |
| loff_t | fpga_io_lseek (struct file *file, loff_t offset, int orig) |
| ssize_t | fpga_io_read (struct file *file, char *buf, size_t count, loff_t *off) |
| Maybe make an "atomic" read/write FPGA sequence that is executed with IRQ down? How? | |
| void | fpga_table_write (unsigned long fpga_addr, unsigned long *data, int length) |
Definition at line 206 of file fpga_io.c.
References canon_lens_io(), capture_pins(), capture_read(), ccam_cr_shadow, D, FPGACONF_CANON_IOBYTE, FPGACONF_CONTROL_REG, FPGACONF_CR_MODIFY, FPGACONF_CR_SHADOW, FPGACONF_CR_SHADOW1, FPGACONF_RD_WAITSTATES, FPGACONF_READ_CAPTURE, FPGACONF_READREG, FPGACONF_READREG4, FPGACONF_READREG_H, FPGACONF_READREG_H4, FPGACONF_READREG_L, FPGACONF_READREG_L4, FPGACONF_START_CAPTURE, FPGACONF_WR_WAITSTATES, FPGACONF_WRITEREG, FPGACONF_WRITEREG4, int, local_irq_restore, local_irq_save, port_csp0_addr, port_csp4_addr, printk, and X313_WA_WCTL.
Referenced by fpga_ioctl().
| loff_t fpga_io_lseek | ( | struct file * | file, | |
| loff_t | offset, | |||
| int | orig | |||
| ) |
| ssize_t fpga_io_read | ( | struct file * | file, | |
| char * | buf, | |||
| size_t | count, | |||
| loff_t * | off | |||
| ) |
Maybe make an "atomic" read/write FPGA sequence that is executed with IRQ down? How?
it is not safe to read data table if interrupts are - autoexposure may try to read FPGA tables and that will change the pointers. So these functions are provided for testing only, there will be special functions for reading/writing FPGA tables TODO: Make sure that these FPGA accesses do not disturb autoexposure (it should read histogram only while IRQ is off)
off is considered to be a register address, not a byte pointer
now read to the buffer
copy data to user space
dont modify *off, return number of bytes read
Definition at line 363 of file fpga_io.c.
References D, port_csp0_addr, port_csp4_addr, and printk.
Referenced by fpga_read().
| ssize_t fpga_io_write | ( | struct file * | file, | |
| const char * | buf, | |||
| size_t | count, | |||
| loff_t * | off | |||
| ) |
Changing again: 1. Lseek selects a 32-bit register, Bit 13 selects between CSP0 and CSP4 (needed for buffer reads that increment buffer address - i.e. histogram) 2. Writes and Reads always start from register LSB (i.e. multiple one byte reads will each return LSB of the same register), addresses are not autoincremented 3. Writes with less than muptiple of 4 bytes will fill higher bytes with zeros, register addresses are not auto incremented
off is considered to be a register address, not a byte pointer
get data from user space
zero unused bytes in last partial word
now write to FPGA
dont modify *off, return number of bytes written
Definition at line 381 of file fpga_io.c.
References D, port_csp0_addr, port_csp4_addr, printk, and wbuf.
Referenced by fpga_write().
| void fpga_table_write | ( | unsigned long | fpga_addr, | |
| unsigned long * | data, | |||
| int | length | |||
| ) |
Definition at line 402 of file fpga_io.c.
References local_irq_restore, local_irq_save, and port_csp0_addr.
Referenced by set_gamma().
1.5.1