upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
578 lines
14 KiB
578 lines
14 KiB
#include <common.h>
|
|
#include <console.h>
|
|
#include "e1000.h"
|
|
#include <linux/compiler.h>
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* SPI transfer
|
|
*
|
|
* This writes "bitlen" bits out the SPI MOSI port and simultaneously clocks
|
|
* "bitlen" bits in the SPI MISO port. That's just the way SPI works.
|
|
*
|
|
* The source of the outgoing bits is the "dout" parameter and the
|
|
* destination of the input bits is the "din" parameter. Note that "dout"
|
|
* and "din" can point to the same memory location, in which case the
|
|
* input data overwrites the output data (since both are buffered by
|
|
* temporary variables, this is OK).
|
|
*
|
|
* This may be interrupted with Ctrl-C if "intr" is true, otherwise it will
|
|
* never return an error.
|
|
*/
|
|
static int e1000_spi_xfer(struct e1000_hw *hw, unsigned int bitlen,
|
|
const void *dout_mem, void *din_mem, bool intr)
|
|
{
|
|
const uint8_t *dout = dout_mem;
|
|
uint8_t *din = din_mem;
|
|
|
|
uint8_t mask = 0;
|
|
uint32_t eecd;
|
|
unsigned long i;
|
|
|
|
/* Pre-read the control register */
|
|
eecd = E1000_READ_REG(hw, EECD);
|
|
|
|
/* Iterate over each bit */
|
|
for (i = 0, mask = 0x80; i < bitlen; i++, mask = (mask >> 1)?:0x80) {
|
|
/* Check for interrupt */
|
|
if (intr && ctrlc())
|
|
return -1;
|
|
|
|
/* Determine the output bit */
|
|
if (dout && dout[i >> 3] & mask)
|
|
eecd |= E1000_EECD_DI;
|
|
else
|
|
eecd &= ~E1000_EECD_DI;
|
|
|
|
/* Write the output bit and wait 50us */
|
|
E1000_WRITE_REG(hw, EECD, eecd);
|
|
E1000_WRITE_FLUSH(hw);
|
|
udelay(50);
|
|
|
|
/* Poke the clock (waits 50us) */
|
|
e1000_raise_ee_clk(hw, &eecd);
|
|
|
|
/* Now read the input bit */
|
|
eecd = E1000_READ_REG(hw, EECD);
|
|
if (din) {
|
|
if (eecd & E1000_EECD_DO)
|
|
din[i >> 3] |= mask;
|
|
else
|
|
din[i >> 3] &= ~mask;
|
|
}
|
|
|
|
/* Poke the clock again (waits 50us) */
|
|
e1000_lower_ee_clk(hw, &eecd);
|
|
}
|
|
|
|
/* Now clear any remaining bits of the input */
|
|
if (din && (i & 7))
|
|
din[i >> 3] &= ~((mask << 1) - 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_E1000_SPI_GENERIC
|
|
static inline struct e1000_hw *e1000_hw_from_spi(struct spi_slave *spi)
|
|
{
|
|
return container_of(spi, struct e1000_hw, spi);
|
|
}
|
|
|
|
/* Not sure why all of these are necessary */
|
|
void spi_init_r(void) { /* Nothing to do */ }
|
|
void spi_init_f(void) { /* Nothing to do */ }
|
|
void spi_init(void) { /* Nothing to do */ }
|
|
|
|
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int mode)
|
|
{
|
|
/* Find the right PCI device */
|
|
struct e1000_hw *hw = e1000_find_card(bus);
|
|
if (!hw) {
|
|
printf("ERROR: No such e1000 device: e1000#%u\n", bus);
|
|
return NULL;
|
|
}
|
|
|
|
/* Make sure it has an SPI chip */
|
|
if (hw->eeprom.type != e1000_eeprom_spi) {
|
|
E1000_ERR(hw->nic, "No attached SPI EEPROM found!\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* Argument sanity checks */
|
|
if (cs != 0) {
|
|
E1000_ERR(hw->nic, "No such SPI chip: %u\n", cs);
|
|
return NULL;
|
|
}
|
|
if (mode != SPI_MODE_0) {
|
|
E1000_ERR(hw->nic, "Only SPI MODE-0 is supported!\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* TODO: Use max_hz somehow */
|
|
E1000_DBG(hw->nic, "EEPROM SPI access requested\n");
|
|
return &hw->spi;
|
|
}
|
|
|
|
void spi_free_slave(struct spi_slave *spi)
|
|
{
|
|
__maybe_unused struct e1000_hw *hw = e1000_hw_from_spi(spi);
|
|
E1000_DBG(hw->nic, "EEPROM SPI access released\n");
|
|
}
|
|
|
|
int spi_claim_bus(struct spi_slave *spi)
|
|
{
|
|
struct e1000_hw *hw = e1000_hw_from_spi(spi);
|
|
|
|
if (e1000_acquire_eeprom(hw)) {
|
|
E1000_ERR(hw->nic, "EEPROM SPI cannot be acquired!\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void spi_release_bus(struct spi_slave *spi)
|
|
{
|
|
struct e1000_hw *hw = e1000_hw_from_spi(spi);
|
|
e1000_release_eeprom(hw);
|
|
}
|
|
|
|
/* Skinny wrapper around e1000_spi_xfer */
|
|
int spi_xfer(struct spi_slave *spi, unsigned int bitlen,
|
|
const void *dout_mem, void *din_mem, unsigned long flags)
|
|
{
|
|
struct e1000_hw *hw = e1000_hw_from_spi(spi);
|
|
int ret;
|
|
|
|
if (flags & SPI_XFER_BEGIN)
|
|
e1000_standby_eeprom(hw);
|
|
|
|
ret = e1000_spi_xfer(hw, bitlen, dout_mem, din_mem, true);
|
|
|
|
if (flags & SPI_XFER_END)
|
|
e1000_standby_eeprom(hw);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* not CONFIG_E1000_SPI_GENERIC */
|
|
|
|
#ifdef CONFIG_CMD_E1000
|
|
|
|
/* The EEPROM opcodes */
|
|
#define SPI_EEPROM_ENABLE_WR 0x06
|
|
#define SPI_EEPROM_DISABLE_WR 0x04
|
|
#define SPI_EEPROM_WRITE_STATUS 0x01
|
|
#define SPI_EEPROM_READ_STATUS 0x05
|
|
#define SPI_EEPROM_WRITE_PAGE 0x02
|
|
#define SPI_EEPROM_READ_PAGE 0x03
|
|
|
|
/* The EEPROM status bits */
|
|
#define SPI_EEPROM_STATUS_BUSY 0x01
|
|
#define SPI_EEPROM_STATUS_WREN 0x02
|
|
|
|
static int e1000_spi_eeprom_enable_wr(struct e1000_hw *hw, bool intr)
|
|
{
|
|
u8 op[] = { SPI_EEPROM_ENABLE_WR };
|
|
e1000_standby_eeprom(hw);
|
|
return e1000_spi_xfer(hw, 8*sizeof(op), op, NULL, intr);
|
|
}
|
|
|
|
/*
|
|
* These have been tested to perform correctly, but they are not used by any
|
|
* of the EEPROM commands at this time.
|
|
*/
|
|
static __maybe_unused int e1000_spi_eeprom_disable_wr(struct e1000_hw *hw,
|
|
bool intr)
|
|
{
|
|
u8 op[] = { SPI_EEPROM_DISABLE_WR };
|
|
e1000_standby_eeprom(hw);
|
|
return e1000_spi_xfer(hw, 8*sizeof(op), op, NULL, intr);
|
|
}
|
|
|
|
static __maybe_unused int e1000_spi_eeprom_write_status(struct e1000_hw *hw,
|
|
u8 status, bool intr)
|
|
{
|
|
u8 op[] = { SPI_EEPROM_WRITE_STATUS, status };
|
|
e1000_standby_eeprom(hw);
|
|
return e1000_spi_xfer(hw, 8*sizeof(op), op, NULL, intr);
|
|
}
|
|
|
|
static int e1000_spi_eeprom_read_status(struct e1000_hw *hw, bool intr)
|
|
{
|
|
u8 op[] = { SPI_EEPROM_READ_STATUS, 0 };
|
|
e1000_standby_eeprom(hw);
|
|
if (e1000_spi_xfer(hw, 8*sizeof(op), op, op, intr))
|
|
return -1;
|
|
return op[1];
|
|
}
|
|
|
|
static int e1000_spi_eeprom_write_page(struct e1000_hw *hw,
|
|
const void *data, u16 off, u16 len, bool intr)
|
|
{
|
|
u8 op[] = {
|
|
SPI_EEPROM_WRITE_PAGE,
|
|
(off >> (hw->eeprom.address_bits - 8)) & 0xff, off & 0xff
|
|
};
|
|
|
|
e1000_standby_eeprom(hw);
|
|
|
|
if (e1000_spi_xfer(hw, 8 + hw->eeprom.address_bits, op, NULL, intr))
|
|
return -1;
|
|
if (e1000_spi_xfer(hw, len << 3, data, NULL, intr))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int e1000_spi_eeprom_read_page(struct e1000_hw *hw,
|
|
void *data, u16 off, u16 len, bool intr)
|
|
{
|
|
u8 op[] = {
|
|
SPI_EEPROM_READ_PAGE,
|
|
(off >> (hw->eeprom.address_bits - 8)) & 0xff, off & 0xff
|
|
};
|
|
|
|
e1000_standby_eeprom(hw);
|
|
|
|
if (e1000_spi_xfer(hw, 8 + hw->eeprom.address_bits, op, NULL, intr))
|
|
return -1;
|
|
if (e1000_spi_xfer(hw, len << 3, NULL, data, intr))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int e1000_spi_eeprom_poll_ready(struct e1000_hw *hw, bool intr)
|
|
{
|
|
int status;
|
|
while ((status = e1000_spi_eeprom_read_status(hw, intr)) >= 0) {
|
|
if (!(status & SPI_EEPROM_STATUS_BUSY))
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int e1000_spi_eeprom_dump(struct e1000_hw *hw,
|
|
void *data, u16 off, unsigned int len, bool intr)
|
|
{
|
|
/* Interruptibly wait for the EEPROM to be ready */
|
|
if (e1000_spi_eeprom_poll_ready(hw, intr))
|
|
return -1;
|
|
|
|
/* Dump each page in sequence */
|
|
while (len) {
|
|
/* Calculate the data bytes on this page */
|
|
u16 pg_off = off & (hw->eeprom.page_size - 1);
|
|
u16 pg_len = hw->eeprom.page_size - pg_off;
|
|
if (pg_len > len)
|
|
pg_len = len;
|
|
|
|
/* Now dump the page */
|
|
if (e1000_spi_eeprom_read_page(hw, data, off, pg_len, intr))
|
|
return -1;
|
|
|
|
/* Otherwise go on to the next page */
|
|
len -= pg_len;
|
|
off += pg_len;
|
|
data += pg_len;
|
|
}
|
|
|
|
/* We're done! */
|
|
return 0;
|
|
}
|
|
|
|
static int e1000_spi_eeprom_program(struct e1000_hw *hw,
|
|
const void *data, u16 off, u16 len, bool intr)
|
|
{
|
|
/* Program each page in sequence */
|
|
while (len) {
|
|
/* Calculate the data bytes on this page */
|
|
u16 pg_off = off & (hw->eeprom.page_size - 1);
|
|
u16 pg_len = hw->eeprom.page_size - pg_off;
|
|
if (pg_len > len)
|
|
pg_len = len;
|
|
|
|
/* Interruptibly wait for the EEPROM to be ready */
|
|
if (e1000_spi_eeprom_poll_ready(hw, intr))
|
|
return -1;
|
|
|
|
/* Enable write access */
|
|
if (e1000_spi_eeprom_enable_wr(hw, intr))
|
|
return -1;
|
|
|
|
/* Now program the page */
|
|
if (e1000_spi_eeprom_write_page(hw, data, off, pg_len, intr))
|
|
return -1;
|
|
|
|
/* Otherwise go on to the next page */
|
|
len -= pg_len;
|
|
off += pg_len;
|
|
data += pg_len;
|
|
}
|
|
|
|
/* Wait for the last write to complete */
|
|
if (e1000_spi_eeprom_poll_ready(hw, intr))
|
|
return -1;
|
|
|
|
/* We're done! */
|
|
return 0;
|
|
}
|
|
|
|
static int do_e1000_spi_show(cmd_tbl_t *cmdtp, struct e1000_hw *hw,
|
|
int argc, char * const argv[])
|
|
{
|
|
unsigned int length = 0;
|
|
u16 i, offset = 0;
|
|
u8 *buffer;
|
|
int err;
|
|
|
|
if (argc > 2) {
|
|
cmd_usage(cmdtp);
|
|
return 1;
|
|
}
|
|
|
|
/* Parse the offset and length */
|
|
if (argc >= 1)
|
|
offset = simple_strtoul(argv[0], NULL, 0);
|
|
if (argc == 2)
|
|
length = simple_strtoul(argv[1], NULL, 0);
|
|
else if (offset < (hw->eeprom.word_size << 1))
|
|
length = (hw->eeprom.word_size << 1) - offset;
|
|
|
|
/* Extra sanity checks */
|
|
if (!length) {
|
|
E1000_ERR(hw->nic, "Requested zero-sized dump!\n");
|
|
return 1;
|
|
}
|
|
if ((0x10000 < length) || (0x10000 - length < offset)) {
|
|
E1000_ERR(hw->nic, "Can't dump past 0xFFFF!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Allocate a buffer to hold stuff */
|
|
buffer = malloc(length);
|
|
if (!buffer) {
|
|
E1000_ERR(hw->nic, "Out of Memory!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Acquire the EEPROM and perform the dump */
|
|
if (e1000_acquire_eeprom(hw)) {
|
|
E1000_ERR(hw->nic, "EEPROM SPI cannot be acquired!\n");
|
|
free(buffer);
|
|
return 1;
|
|
}
|
|
err = e1000_spi_eeprom_dump(hw, buffer, offset, length, true);
|
|
e1000_release_eeprom(hw);
|
|
if (err) {
|
|
E1000_ERR(hw->nic, "Interrupted!\n");
|
|
free(buffer);
|
|
return 1;
|
|
}
|
|
|
|
/* Now hexdump the result */
|
|
printf("%s: ===== Intel e1000 EEPROM (0x%04hX - 0x%04hX) =====",
|
|
hw->nic->name, offset, offset + length - 1);
|
|
for (i = 0; i < length; i++) {
|
|
if ((i & 0xF) == 0)
|
|
printf("\n%s: %04hX: ", hw->nic->name, offset + i);
|
|
else if ((i & 0xF) == 0x8)
|
|
printf(" ");
|
|
printf(" %02hx", buffer[i]);
|
|
}
|
|
printf("\n");
|
|
|
|
/* Success! */
|
|
free(buffer);
|
|
return 0;
|
|
}
|
|
|
|
static int do_e1000_spi_dump(cmd_tbl_t *cmdtp, struct e1000_hw *hw,
|
|
int argc, char * const argv[])
|
|
{
|
|
unsigned int length;
|
|
u16 offset;
|
|
void *dest;
|
|
|
|
if (argc != 3) {
|
|
cmd_usage(cmdtp);
|
|
return 1;
|
|
}
|
|
|
|
/* Parse the arguments */
|
|
dest = (void *)simple_strtoul(argv[0], NULL, 16);
|
|
offset = simple_strtoul(argv[1], NULL, 0);
|
|
length = simple_strtoul(argv[2], NULL, 0);
|
|
|
|
/* Extra sanity checks */
|
|
if (!length) {
|
|
E1000_ERR(hw->nic, "Requested zero-sized dump!\n");
|
|
return 1;
|
|
}
|
|
if ((0x10000 < length) || (0x10000 - length < offset)) {
|
|
E1000_ERR(hw->nic, "Can't dump past 0xFFFF!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Acquire the EEPROM */
|
|
if (e1000_acquire_eeprom(hw)) {
|
|
E1000_ERR(hw->nic, "EEPROM SPI cannot be acquired!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Perform the programming operation */
|
|
if (e1000_spi_eeprom_dump(hw, dest, offset, length, true) < 0) {
|
|
E1000_ERR(hw->nic, "Interrupted!\n");
|
|
e1000_release_eeprom(hw);
|
|
return 1;
|
|
}
|
|
|
|
e1000_release_eeprom(hw);
|
|
printf("%s: ===== EEPROM DUMP COMPLETE =====\n", hw->nic->name);
|
|
return 0;
|
|
}
|
|
|
|
static int do_e1000_spi_program(cmd_tbl_t *cmdtp, struct e1000_hw *hw,
|
|
int argc, char * const argv[])
|
|
{
|
|
unsigned int length;
|
|
const void *source;
|
|
u16 offset;
|
|
|
|
if (argc != 3) {
|
|
cmd_usage(cmdtp);
|
|
return 1;
|
|
}
|
|
|
|
/* Parse the arguments */
|
|
source = (const void *)simple_strtoul(argv[0], NULL, 16);
|
|
offset = simple_strtoul(argv[1], NULL, 0);
|
|
length = simple_strtoul(argv[2], NULL, 0);
|
|
|
|
/* Acquire the EEPROM */
|
|
if (e1000_acquire_eeprom(hw)) {
|
|
E1000_ERR(hw->nic, "EEPROM SPI cannot be acquired!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Perform the programming operation */
|
|
if (e1000_spi_eeprom_program(hw, source, offset, length, true) < 0) {
|
|
E1000_ERR(hw->nic, "Interrupted!\n");
|
|
e1000_release_eeprom(hw);
|
|
return 1;
|
|
}
|
|
|
|
e1000_release_eeprom(hw);
|
|
printf("%s: ===== EEPROM PROGRAMMED =====\n", hw->nic->name);
|
|
return 0;
|
|
}
|
|
|
|
static int do_e1000_spi_checksum(cmd_tbl_t *cmdtp, struct e1000_hw *hw,
|
|
int argc, char * const argv[])
|
|
{
|
|
uint16_t i, length, checksum = 0, checksum_reg;
|
|
uint16_t *buffer;
|
|
bool upd;
|
|
|
|
if (argc == 0)
|
|
upd = 0;
|
|
else if ((argc == 1) && !strcmp(argv[0], "update"))
|
|
upd = 1;
|
|
else {
|
|
cmd_usage(cmdtp);
|
|
return 1;
|
|
}
|
|
|
|
/* Allocate a temporary buffer */
|
|
length = sizeof(uint16_t) * (EEPROM_CHECKSUM_REG + 1);
|
|
buffer = malloc(length);
|
|
if (!buffer) {
|
|
E1000_ERR(hw->nic, "Unable to allocate EEPROM buffer!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Acquire the EEPROM */
|
|
if (e1000_acquire_eeprom(hw)) {
|
|
E1000_ERR(hw->nic, "EEPROM SPI cannot be acquired!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Read the EEPROM */
|
|
if (e1000_spi_eeprom_dump(hw, buffer, 0, length, true) < 0) {
|
|
E1000_ERR(hw->nic, "Interrupted!\n");
|
|
e1000_release_eeprom(hw);
|
|
return 1;
|
|
}
|
|
|
|
/* Compute the checksum and read the expected value */
|
|
for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
|
|
checksum += le16_to_cpu(buffer[i]);
|
|
checksum = ((uint16_t)EEPROM_SUM) - checksum;
|
|
checksum_reg = le16_to_cpu(buffer[i]);
|
|
|
|
/* Verify it! */
|
|
if (checksum_reg == checksum) {
|
|
printf("%s: INFO: EEPROM checksum is correct! (0x%04hx)\n",
|
|
hw->nic->name, checksum);
|
|
e1000_release_eeprom(hw);
|
|
return 0;
|
|
}
|
|
|
|
/* Hrm, verification failed, print an error */
|
|
E1000_ERR(hw->nic, "EEPROM checksum is incorrect!\n");
|
|
E1000_ERR(hw->nic, " ...register was 0x%04hx, calculated 0x%04hx\n",
|
|
checksum_reg, checksum);
|
|
|
|
/* If they didn't ask us to update it, just return an error */
|
|
if (!upd) {
|
|
e1000_release_eeprom(hw);
|
|
return 1;
|
|
}
|
|
|
|
/* Ok, correct it! */
|
|
printf("%s: Reprogramming the EEPROM checksum...\n", hw->nic->name);
|
|
buffer[i] = cpu_to_le16(checksum);
|
|
if (e1000_spi_eeprom_program(hw, &buffer[i], i * sizeof(uint16_t),
|
|
sizeof(uint16_t), true)) {
|
|
E1000_ERR(hw->nic, "Interrupted!\n");
|
|
e1000_release_eeprom(hw);
|
|
return 1;
|
|
}
|
|
|
|
e1000_release_eeprom(hw);
|
|
return 0;
|
|
}
|
|
|
|
int do_e1000_spi(cmd_tbl_t *cmdtp, struct e1000_hw *hw,
|
|
int argc, char * const argv[])
|
|
{
|
|
if (argc < 1) {
|
|
cmd_usage(cmdtp);
|
|
return 1;
|
|
}
|
|
|
|
/* Make sure it has an SPI chip */
|
|
if (hw->eeprom.type != e1000_eeprom_spi) {
|
|
E1000_ERR(hw->nic, "No attached SPI EEPROM found!\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Check the eeprom sub-sub-command arguments */
|
|
if (!strcmp(argv[0], "show"))
|
|
return do_e1000_spi_show(cmdtp, hw, argc - 1, argv + 1);
|
|
|
|
if (!strcmp(argv[0], "dump"))
|
|
return do_e1000_spi_dump(cmdtp, hw, argc - 1, argv + 1);
|
|
|
|
if (!strcmp(argv[0], "program"))
|
|
return do_e1000_spi_program(cmdtp, hw, argc - 1, argv + 1);
|
|
|
|
if (!strcmp(argv[0], "checksum"))
|
|
return do_e1000_spi_checksum(cmdtp, hw, argc - 1, argv + 1);
|
|
|
|
cmd_usage(cmdtp);
|
|
return 1;
|
|
}
|
|
|
|
#endif /* not CONFIG_CMD_E1000 */
|
|
|