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pimp up the debug low level driver

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git-svn-id: svn+ssh://en.codiert.org/home/staff/ben/dev/misc.svn/projects/fpgafs@398 766a2236-cff9-0310-b0c0-a81a5f92509a
This commit is contained in:
ben 2007-09-12 15:45:28 +00:00
parent 11762c3dab
commit 96948e503d
1 changed files with 46 additions and 5 deletions
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51
fpgafs_lldrv_dbg.c
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@ -8,16 +8,44 @@
#include <linux/mm.h> #include <linux/mm.h>
#include "fpgafs.h" #include "fpgafs.h"
#define MEM_SIZE 255
/* some test memory */
static char *mem;
static int fpgafs_send_data_dbg(struct fpga_context *ctx, const char __user *buf, int len) static int fpgafs_send_data_dbg(struct fpga_context *ctx, const char __user *buf, int len)
{ {
printk("fpgafs: send data DEBUG\n"); u32 cp = 0;
return 0; u8 __user *usr;
if (mem == NULL)
return -EBUSY;
len = (len > MEM_SIZE)?MEM_SIZE:len;
if (len < 2)
return -EINVAL;
if (!access_ok(VERIFY_READ, buf, len))
return -EFAULT;
while (cp < len) {
usr = (u8*)&buf[cp];
if (__get_user(mem[cp], usr))
return -EFAULT;
cp++;
}
return len;
} }
static int fpgafs_recv_data_dbg(struct fpga_context *ctx, unsigned char *buf, int len) static int fpgafs_recv_data_dbg(struct fpga_context *ctx, unsigned char *buf, int len)
{ {
printk("fpgafs: receive data DEBUG\n"); printk("fpgafs: receive data DEBUG\n");
return 4; len = (len > MEM_SIZE)?MEM_SIZE:len;
if (copy_to_user(buf, mem, len))
return -EFAULT;
return len;
} }
static int fpgafs_read_load_dbg(struct fpga_context *ctx, unsigned char *buf, int len) static int fpgafs_read_load_dbg(struct fpga_context *ctx, unsigned char *buf, int len)
@ -59,10 +87,23 @@ static int fpgafs_write_load_dbg(struct fpga_context *ctx, const char __user *bu
return len; return len;
} }
static int fpgafs_init_dbg(void)
{
mem = kmalloc(MEM_SIZE,GFP_USER);
return 0;
}
static int fpgafs_exit_dbg(void)
{
kfree(mem);
return 0;
}
static struct fpgafs_lldrv fpgafs_lldrv_dbg = { static struct fpgafs_lldrv fpgafs_lldrv_dbg = {
.name = "dbg", .name = "dbg",
.init = NULL, .init = fpgafs_init_dbg,
.exit = NULL, .exit = fpgafs_exit_dbg,
.send = &fpgafs_send_data_dbg, .send = &fpgafs_send_data_dbg,
.recv = &fpgafs_recv_data_dbg, .recv = &fpgafs_recv_data_dbg,
.read_load = &fpgafs_read_load_dbg, .read_load = &fpgafs_read_load_dbg,