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Commit feccad13 authored by Bernhard Nortmann's avatar Bernhard Nortmann
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fel: Move readl/writel code over to fel_lib 


Signed-off-by: default avatarBernhard Nortmann <bernhard.nortmann@web.de>
parent 62daa36f
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fel.c
View file @ feccad13
...@@ -286,147 +286,18 @@ void aw_write_arm_cp_reg(feldev_handle *dev, soc_info_t *soc_info, ...@@ -286,147 +286,18 @@ void aw_write_arm_cp_reg(feldev_handle *dev, soc_info_t *soc_info,
aw_fel_execute(dev, soc_info->scratch_addr); aw_fel_execute(dev, soc_info->scratch_addr);
} }
/*
* We don't want the scratch code/buffer to exceed a maximum size of 0x400 bytes
* (256 32-bit words) on readl_n/writel_n transfers. To guarantee this, we have
* to account for the amount of space the ARM code uses.
*/
#define LCODE_ARM_WORDS 12 /* word count of the [read/write]l_n scratch code */
#define LCODE_ARM_SIZE (LCODE_ARM_WORDS << 2) /* code size in bytes */
#define LCODE_MAX_TOTAL 0x100 /* max. words in buffer */
#define LCODE_MAX_WORDS (LCODE_MAX_TOTAL - LCODE_ARM_WORDS) /* data words */
/* multiple "readl" from sequential addresses to a destination buffer */
void aw_fel_readl_n(feldev_handle *dev, uint32_t addr,
uint32_t *dst, size_t count)
{
if (count == 0) return;
if (count > LCODE_MAX_WORDS) {
fprintf(stderr,
"ERROR: Max. word count exceeded, truncating aw_fel_readl_n() transfer\n");
count = LCODE_MAX_WORDS;
}
soc_info_t *soc_info = dev->soc_info;
assert(LCODE_MAX_WORDS < 256); /* protect against corruption of ARM code */
uint32_t arm_code[] = {
htole32(0xe59f0020), /* ldr r0, [pc, #32] ; ldr r0,[read_addr] */
htole32(0xe28f1024), /* add r1, pc, #36 ; adr r1, read_data */
htole32(0xe59f201c), /* ldr r2, [pc, #28] ; ldr r2,[read_count] */
htole32(0xe3520000 + LCODE_MAX_WORDS), /* cmp r2, #LCODE_MAX_WORDS */
htole32(0xc3a02000 + LCODE_MAX_WORDS), /* movgt r2, #LCODE_MAX_WORDS */
/* read_loop: */
htole32(0xe2522001), /* subs r2, r2, #1 ; r2 -= 1 */
htole32(0x412fff1e), /* bxmi lr ; return if (r2 < 0) */
htole32(0xe4903004), /* ldr r3, [r0], #4 ; load and post-inc */
htole32(0xe4813004), /* str r3, [r1], #4 ; store and post-inc */
htole32(0xeafffffa), /* b read_loop */
htole32(addr), /* read_addr */
htole32(count) /* read_count */
/* read_data (buffer) follows, i.e. values go here */
};
assert(sizeof(arm_code) == LCODE_ARM_SIZE);
/* scratch buffer setup: transfers ARM code, including addr and count */
aw_fel_write(dev, arm_code, soc_info->scratch_addr, sizeof(arm_code));
/* execute code, read back the result */
aw_fel_execute(dev, soc_info->scratch_addr);
uint32_t buffer[count];
aw_fel_read(dev, soc_info->scratch_addr + LCODE_ARM_SIZE,
buffer, sizeof(buffer));
/* extract values to destination buffer */
uint32_t *val = buffer;
while (count-- > 0)
*dst++ = le32toh(*val++);
}
/* "readl" of a single value */ /* "readl" of a single value */
uint32_t aw_fel_readl(feldev_handle *dev, uint32_t addr) uint32_t fel_readl(feldev_handle *dev, uint32_t addr)
{ {
uint32_t val; uint32_t val;
aw_fel_readl_n(dev, addr, &val, 1); fel_readl_n(dev, addr, &val, 1);
return val; return val;
} }
/*
* aw_fel_readl_n() wrapper that can handle large transfers. If necessary,
* those will be done in separate 'chunks' of no more than LCODE_MAX_WORDS.
*/
void fel_readl_n(feldev_handle *dev, uint32_t addr, uint32_t *dst, size_t count)
{
while (count > 0) {
size_t n = count > LCODE_MAX_WORDS ? LCODE_MAX_WORDS : count;
aw_fel_readl_n(dev, addr, dst, n);
addr += n * sizeof(uint32_t);
dst += n;
count -= n;
}
}
/* multiple "writel" from a source buffer to sequential addresses */
void aw_fel_writel_n(feldev_handle *dev, uint32_t addr,
uint32_t *src, size_t count)
{
if (count == 0) return;
if (count > LCODE_MAX_WORDS) {
fprintf(stderr,
"ERROR: Max. word count exceeded, truncating aw_fel_writel_n() transfer\n");
count = LCODE_MAX_WORDS;
}
soc_info_t *soc_info = dev->soc_info;
assert(LCODE_MAX_WORDS < 256); /* protect against corruption of ARM code */
/*
* We need a fixed array size to allow for (partial) initialization,
* so we'll claim the maximum total number of words (0x100) here.
*/
uint32_t arm_code[LCODE_MAX_TOTAL] = {
htole32(0xe59f0020), /* ldr r0, [pc, #32] ; ldr r0,[write_addr] */
htole32(0xe28f1024), /* add r1, pc, #36 ; adr r1, write_data */
htole32(0xe59f201c), /* ldr r2, [pc, #28] ; ldr r2,[write_count]*/
htole32(0xe3520000 + LCODE_MAX_WORDS), /* cmp r2, #LCODE_MAX_WORDS */
htole32(0xc3a02000 + LCODE_MAX_WORDS), /* movgt r2, #LCODE_MAX_WORDS */
/* write_loop: */
htole32(0xe2522001), /* subs r2, r2, #1 ; r2 -= 1 */
htole32(0x412fff1e), /* bxmi lr ; return if (r2 < 0) */
htole32(0xe4913004), /* ldr r3, [r1], #4 ; load and post-inc */
htole32(0xe4803004), /* str r3, [r0], #4 ; store and post-inc */
htole32(0xeafffffa), /* b write_loop */
htole32(addr), /* write_addr */
htole32(count) /* write_count */
/* write_data (buffer) follows, i.e. values taken from here */
};
/* copy values from source buffer */
size_t i;
for (i = 0; i < count; i++)
arm_code[LCODE_ARM_WORDS + i] = htole32(*src++);
/* scratch buffer setup: transfers ARM code and data */
aw_fel_write(dev, arm_code, soc_info->scratch_addr,
(LCODE_ARM_WORDS + count) * sizeof(uint32_t));
/* execute, and we're done */
aw_fel_execute(dev, soc_info->scratch_addr);
}
/* "writel" of a single value */ /* "writel" of a single value */
void aw_fel_writel(feldev_handle *dev, uint32_t addr, uint32_t val) void fel_writel(feldev_handle *dev, uint32_t addr, uint32_t val)
{ {
aw_fel_writel_n(dev, addr, &val, 1); fel_writel_n(dev, addr, &val, 1);
}
/*
* aw_fel_writel_n() wrapper that can handle large transfers. If necessary,
* those will be done in separate 'chunks' of no more than LCODE_MAX_WORDS.
*/
void fel_writel_n(feldev_handle *dev, uint32_t addr, uint32_t *src, size_t count)
{
while (count > 0) {
size_t n = count > LCODE_MAX_WORDS ? LCODE_MAX_WORDS : count;
aw_fel_writel_n(dev, addr, src, n);
addr += n * sizeof(uint32_t);
src += n;
count -= n;
}
} }
void aw_fel_print_sid(feldev_handle *dev) void aw_fel_print_sid(feldev_handle *dev)
...@@ -436,7 +307,7 @@ void aw_fel_print_sid(feldev_handle *dev) ...@@ -436,7 +307,7 @@ void aw_fel_print_sid(feldev_handle *dev)
pr_info("SID key (e-fuses) at 0x%08X\n", soc_info->sid_addr); pr_info("SID key (e-fuses) at 0x%08X\n", soc_info->sid_addr);
uint32_t key[4]; uint32_t key[4];
aw_fel_readl_n(dev, soc_info->sid_addr, key, 4); fel_readl_n(dev, soc_info->sid_addr, key, 4);
unsigned int i; unsigned int i;
/* output SID in "xxxxxxxx:xxxxxxxx:xxxxxxxx:xxxxxxxx" format */ /* output SID in "xxxxxxxx:xxxxxxxx:xxxxxxxx:xxxxxxxx" format */
...@@ -1192,10 +1063,10 @@ int main(int argc, char **argv) ...@@ -1192,10 +1063,10 @@ int main(int argc, char **argv)
aw_fel_dump(handle, strtoul(argv[2], NULL, 0), strtoul(argv[3], NULL, 0)); aw_fel_dump(handle, strtoul(argv[2], NULL, 0), strtoul(argv[3], NULL, 0));
skip = 3; skip = 3;
} else if (strcmp(argv[1], "readl") == 0 && argc > 2) { } else if (strcmp(argv[1], "readl") == 0 && argc > 2) {
printf("0x%08x\n", aw_fel_readl(handle, strtoul(argv[2], NULL, 0))); printf("0x%08x\n", fel_readl(handle, strtoul(argv[2], NULL, 0)));
skip = 2; skip = 2;
} else if (strcmp(argv[1], "writel") == 0 && argc > 3) { } else if (strcmp(argv[1], "writel") == 0 && argc > 3) {
aw_fel_writel(handle, strtoul(argv[2], NULL, 0), strtoul(argv[3], NULL, 0)); fel_writel(handle, strtoul(argv[2], NULL, 0), strtoul(argv[3], NULL, 0));
skip = 3; skip = 3;
} else if (strncmp(argv[1], "exe", 3) == 0 && argc > 2) { } else if (strncmp(argv[1], "exe", 3) == 0 && argc > 2) {
aw_fel_execute(handle, strtoul(argv[2], NULL, 0)); aw_fel_execute(handle, strtoul(argv[2], NULL, 0));
......
fel_lib.c
View file @ feccad13
...@@ -241,6 +241,133 @@ void aw_fel_write_buffer(feldev_handle *dev, void *buf, uint32_t offset, ...@@ -241,6 +241,133 @@ void aw_fel_write_buffer(feldev_handle *dev, void *buf, uint32_t offset,
aw_read_fel_status(dev); aw_read_fel_status(dev);
} }
/*
* We don't want the scratch code/buffer to exceed a maximum size of 0x400 bytes
* (256 32-bit words) on readl_n/writel_n transfers. To guarantee this, we have
* to account for the amount of space the ARM code uses.
*/
#define LCODE_ARM_WORDS 12 /* word count of the [read/write]l_n scratch code */
#define LCODE_ARM_SIZE (LCODE_ARM_WORDS << 2) /* code size in bytes */
#define LCODE_MAX_TOTAL 0x100 /* max. words in buffer */
#define LCODE_MAX_WORDS (LCODE_MAX_TOTAL - LCODE_ARM_WORDS) /* data words */
/* multiple "readl" from sequential addresses to a destination buffer */
static void aw_fel_readl_n(feldev_handle *dev, uint32_t addr,
uint32_t *dst, size_t count)
{
if (count == 0) return;
if (count > LCODE_MAX_WORDS) {
fprintf(stderr,
"ERROR: Max. word count exceeded, truncating aw_fel_readl_n() transfer\n");
count = LCODE_MAX_WORDS;
}
assert(LCODE_MAX_WORDS < 256); /* protect against corruption of ARM code */
uint32_t arm_code[] = {
htole32(0xe59f0020), /* ldr r0, [pc, #32] ; ldr r0,[read_addr] */
htole32(0xe28f1024), /* add r1, pc, #36 ; adr r1, read_data */
htole32(0xe59f201c), /* ldr r2, [pc, #28] ; ldr r2,[read_count] */
htole32(0xe3520000 + LCODE_MAX_WORDS), /* cmp r2, #LCODE_MAX_WORDS */
htole32(0xc3a02000 + LCODE_MAX_WORDS), /* movgt r2, #LCODE_MAX_WORDS */
/* read_loop: */
htole32(0xe2522001), /* subs r2, r2, #1 ; r2 -= 1 */
htole32(0x412fff1e), /* bxmi lr ; return if (r2 < 0) */
htole32(0xe4903004), /* ldr r3, [r0], #4 ; load and post-inc */
htole32(0xe4813004), /* str r3, [r1], #4 ; store and post-inc */
htole32(0xeafffffa), /* b read_loop */
htole32(addr), /* read_addr */
htole32(count) /* read_count */
/* read_data (buffer) follows, i.e. values go here */
};
assert(sizeof(arm_code) == LCODE_ARM_SIZE);
/* scratch buffer setup: transfers ARM code, including addr and count */
aw_fel_write(dev, arm_code, dev->soc_info->scratch_addr, sizeof(arm_code));
/* execute code, read back the result */
aw_fel_execute(dev, dev->soc_info->scratch_addr);
uint32_t buffer[count];
aw_fel_read(dev, dev->soc_info->scratch_addr + LCODE_ARM_SIZE,
buffer, sizeof(buffer));
/* extract values to destination buffer */
uint32_t *val = buffer;
while (count-- > 0)
*dst++ = le32toh(*val++);
}
/*
* aw_fel_readl_n() wrapper that can handle large transfers. If necessary,
* those will be done in separate 'chunks' of no more than LCODE_MAX_WORDS.
*/
void fel_readl_n(feldev_handle *dev, uint32_t addr, uint32_t *dst, size_t count)
{
while (count > 0) {
size_t n = count > LCODE_MAX_WORDS ? LCODE_MAX_WORDS : count;
aw_fel_readl_n(dev, addr, dst, n);
addr += n * sizeof(uint32_t);
dst += n;
count -= n;
}
}
/* multiple "writel" from a source buffer to sequential addresses */
static void aw_fel_writel_n(feldev_handle *dev, uint32_t addr,
uint32_t *src, size_t count)
{
if (count == 0) return;
if (count > LCODE_MAX_WORDS) {
fprintf(stderr,
"ERROR: Max. word count exceeded, truncating aw_fel_writel_n() transfer\n");
count = LCODE_MAX_WORDS;
}
assert(LCODE_MAX_WORDS < 256); /* protect against corruption of ARM code */
/*
* We need a fixed array size to allow for (partial) initialization,
* so we'll claim the maximum total number of words (0x100) here.
*/
uint32_t arm_code[LCODE_MAX_TOTAL] = {
htole32(0xe59f0020), /* ldr r0, [pc, #32] ; ldr r0,[write_addr] */
htole32(0xe28f1024), /* add r1, pc, #36 ; adr r1, write_data */
htole32(0xe59f201c), /* ldr r2, [pc, #28] ; ldr r2,[write_count]*/
htole32(0xe3520000 + LCODE_MAX_WORDS), /* cmp r2, #LCODE_MAX_WORDS */
htole32(0xc3a02000 + LCODE_MAX_WORDS), /* movgt r2, #LCODE_MAX_WORDS */
/* write_loop: */
htole32(0xe2522001), /* subs r2, r2, #1 ; r2 -= 1 */
htole32(0x412fff1e), /* bxmi lr ; return if (r2 < 0) */
htole32(0xe4913004), /* ldr r3, [r1], #4 ; load and post-inc */
htole32(0xe4803004), /* str r3, [r0], #4 ; store and post-inc */
htole32(0xeafffffa), /* b write_loop */
htole32(addr), /* write_addr */
htole32(count) /* write_count */
/* write_data (buffer) follows, i.e. values taken from here */
};
/* copy values from source buffer */
size_t i;
for (i = 0; i < count; i++)
arm_code[LCODE_ARM_WORDS + i] = htole32(*src++);
/* scratch buffer setup: transfers ARM code and data */
aw_fel_write(dev, arm_code, dev->soc_info->scratch_addr,
(LCODE_ARM_WORDS + count) * sizeof(uint32_t));
/* execute, and we're done */
aw_fel_execute(dev, dev->soc_info->scratch_addr);
}
/*
* aw_fel_writel_n() wrapper that can handle large transfers. If necessary,
* those will be done in separate 'chunks' of no more than LCODE_MAX_WORDS.
*/
void fel_writel_n(feldev_handle *dev, uint32_t addr, uint32_t *src, size_t count)
{
while (count > 0) {
size_t n = count > LCODE_MAX_WORDS ? LCODE_MAX_WORDS : count;
aw_fel_writel_n(dev, addr, src, n);
addr += n * sizeof(uint32_t);
src += n;
count -= n;
}
}
/* general functions, "FEL device" management */ /* general functions, "FEL device" management */
static int feldev_get_endpoint(feldev_handle *dev) static int feldev_get_endpoint(feldev_handle *dev)
......
fel_lib.h
View file @ feccad13
...@@ -52,4 +52,7 @@ void aw_fel_write_buffer(feldev_handle *dev, void *buf, uint32_t offset, ...@@ -52,4 +52,7 @@ void aw_fel_write_buffer(feldev_handle *dev, void *buf, uint32_t offset,
size_t len, bool progress); size_t len, bool progress);
void aw_fel_execute(feldev_handle *dev, uint32_t offset); void aw_fel_execute(feldev_handle *dev, uint32_t offset);
void fel_readl_n(feldev_handle *dev, uint32_t addr, uint32_t *dst, size_t count);
void fel_writel_n(feldev_handle *dev, uint32_t addr, uint32_t *src, size_t count);
#endif /* _SUNXI_TOOLS_FEL_LIB_H */ #endif /* _SUNXI_TOOLS_FEL_LIB_H */
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