int do_qlm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
int num_qlm;
int qlm;
int c_arg;
/* Make sure we got the correct number of arguments */
if (((argc - 2) % 3) != 0) {
printf("Invalid number of arguments %d\n", argc);
usage(argv);
return -1;
}
num_qlm = cvmx_qlm_get_num();
qlm = simple_strtoul(argv[1], NULL, 0);
if ((qlm < 0) || (qlm >= num_qlm)) {
printf("Invalid qlm number\n");
return -1;
}
if (argc >= 5) {
int lane;
uint64_t value;
int field_count;
int num_fields = (argc - 2) / 3;
c_arg = 2;
for (field_count = 0; field_count < num_fields; field_count++) {
char name[30];
if (!strcmp(argv[c_arg], "all"))
lane = -1;
else {
lane = (int)simple_strtol(argv[c_arg], NULL, 0);
if (lane >= cvmx_qlm_get_lanes(qlm)) {
printf("Invalid lane passed\n");
return -1;
}
}
strcpy(name, argv[c_arg + 1]);
value = convert_number(argv[c_arg + 2]);
cvmx_qlm_jtag_set(qlm, lane, name, value);
/* Assert serdes_tx_byp to force the new settings to
override the QLM default. */
if (strncmp(name, "biasdrv_", 8) == 0 ||
strncmp(name, "tcoeff_", 7) == 0)
cvmx_qlm_jtag_set(qlm, lane, "serdes_tx_byp", 1);
c_arg += 3;
if (lane == -1)
break;
}
} else
cvmx_qlm_display_registers(qlm);
return 0;
}
/**
* Initialize the QLM layer
*/
void cvmx_qlm_init(void)
{
int qlm;
int qlm_jtag_length;
char *qlm_jtag_name = "cvmx_qlm_jtag";
int qlm_jtag_size = CVMX_QLM_JTAG_UINT32 * 8 * 4;
static uint64_t qlm_base = 0;
const cvmx_bootmem_named_block_desc_t *desc;
#ifndef CVMX_BUILD_FOR_LINUX_HOST
/* Skip actual JTAG accesses on simulator */
if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM)
return;
#endif
qlm_jtag_length = cvmx_qlm_jtag_get_length();
if (4 * qlm_jtag_length > (int)sizeof(__cvmx_qlm_jtag_xor_ref[0]) * 8)
{
cvmx_dprintf("ERROR: cvmx_qlm_init: JTAG chain larger than XOR ref size\n");
return;
}
/* No need to initialize the initial JTAG state if cvmx_qlm_jtag
named block is already created. */
if ((desc = cvmx_bootmem_find_named_block(qlm_jtag_name)) != NULL)
{
#ifdef CVMX_BUILD_FOR_LINUX_HOST
char buffer[qlm_jtag_size];
octeon_remote_read_mem(buffer, desc->base_addr, qlm_jtag_size);
memcpy(__cvmx_qlm_jtag_xor_ref, buffer, qlm_jtag_size);
#else
__cvmx_qlm_jtag_xor_ref = cvmx_phys_to_ptr(desc->base_addr);
#endif
/* Initialize the internal JTAG */
cvmx_helper_qlm_jtag_init();
return;
}
/* Create named block to store the initial JTAG state. */
qlm_base = cvmx_bootmem_phy_named_block_alloc(qlm_jtag_size, 0, 0, 128, qlm_jtag_name, CVMX_BOOTMEM_FLAG_END_ALLOC);
if (qlm_base == -1ull)
{
cvmx_dprintf("ERROR: cvmx_qlm_init: Error in creating %s named block\n", qlm_jtag_name);
return;
}
#ifndef CVMX_BUILD_FOR_LINUX_HOST
__cvmx_qlm_jtag_xor_ref = cvmx_phys_to_ptr(qlm_base);
#endif
memset(__cvmx_qlm_jtag_xor_ref, 0, qlm_jtag_size);
/* Initialize the internal JTAG */
cvmx_helper_qlm_jtag_init();
/* Read the XOR defaults for the JTAG chain */
for (qlm=0; qlm<cvmx_qlm_get_num(); qlm++)
{
int i;
/* Capture the reset defaults */
cvmx_helper_qlm_jtag_capture(qlm);
/* Save the reset defaults. This will shift out too much data, but
the extra zeros don't hurt anything */
for (i=0; i<CVMX_QLM_JTAG_UINT32; i++)
__cvmx_qlm_jtag_xor_ref[qlm][i] = cvmx_helper_qlm_jtag_shift(qlm, 32, 0);
}
#ifdef CVMX_BUILD_FOR_LINUX_HOST
/* Update the initial state for oct-remote utils. */
{
char buffer[qlm_jtag_size];
memcpy(buffer, &__cvmx_qlm_jtag_xor_ref, qlm_jtag_size);
octeon_remote_write_mem(qlm_base, buffer, qlm_jtag_size);
}
#endif
/* Apply speed tweak as a workaround for errata G-16094. */
__cvmx_qlm_speed_tweak();
__cvmx_qlm_pcie_idle_dac_tweak();
}
/**
* Errata G-16094: QLM Gen2 Equalizer Default Setting Change.
* CN68XX pass 1.x and CN66XX pass 1.x QLM tweak. This function tweaks the
* JTAG setting for a QLMs to run better at 5 and 6.25Ghz.
*/
void __cvmx_qlm_speed_tweak(void)
{
cvmx_mio_qlmx_cfg_t qlm_cfg;
int num_qlms = cvmx_qlm_get_num();
int qlm;
/* Workaround for Errata (G-16467) */
if (OCTEON_IS_MODEL(OCTEON_CN68XX_PASS2_X)) {
for (qlm = 0; qlm < num_qlms; qlm++) {
int ir50dac;
/* This workaround only applies to QLMs running at 6.25Ghz */
if (cvmx_qlm_get_gbaud_mhz(qlm) == 6250) {
#ifdef CVMX_QLM_DUMP_STATE
cvmx_dprintf("%s:%d: QLM%d: Applying workaround for Errata G-16467\n", __func__, __LINE__, qlm);
cvmx_qlm_display_registers(qlm);
cvmx_dprintf("\n");
#endif
cvmx_qlm_jtag_set(qlm, -1, "cfg_cdr_trunc", 0);
/* Hold the QLM in reset */
cvmx_qlm_jtag_set(qlm, -1, "cfg_rst_n_set", 0);
cvmx_qlm_jtag_set(qlm, -1, "cfg_rst_n_clr", 1);
/* Forcfe TX to be idle */
cvmx_qlm_jtag_set(qlm, -1, "cfg_tx_idle_clr", 0);
cvmx_qlm_jtag_set(qlm, -1, "cfg_tx_idle_set", 1);
if (OCTEON_IS_MODEL(OCTEON_CN68XX_PASS2_0)) {
ir50dac = cvmx_qlm_jtag_get(qlm, 0, "ir50dac");
while (++ir50dac <= 31)
cvmx_qlm_jtag_set(qlm, -1, "ir50dac", ir50dac);
}
cvmx_qlm_jtag_set(qlm, -1, "div4_byp", 0);
cvmx_qlm_jtag_set(qlm, -1, "clkf_byp", 16);
cvmx_qlm_jtag_set(qlm, -1, "serdes_pll_byp", 1);
cvmx_qlm_jtag_set(qlm, -1, "spdsel_byp", 1);
#ifdef CVMX_QLM_DUMP_STATE
cvmx_dprintf("%s:%d: QLM%d: Done applying workaround for Errata G-16467\n", __func__, __LINE__, qlm);
cvmx_qlm_display_registers(qlm);
cvmx_dprintf("\n\n");
#endif
/* The QLM will be taken out of reset later when ILK/XAUI are initialized. */
}
}
#ifndef CVMX_BUILD_FOR_LINUX_HOST
/* These QLM tuning parameters are specific to EBB6800
eval boards using Cavium QLM cables. These should be
removed or tunned based on customer boards. */
if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_EBB6800) {
for (qlm = 0; qlm < num_qlms; qlm++) {
#ifdef CVMX_QLM_DUMP_STATE
cvmx_dprintf("Setting tunning parameters for QLM%d\n", qlm);
#endif
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_hs_ls_byp", 12);
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_hf_byp", 12);
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_lf_ls_byp", 12);
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_lf_byp", 12);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_hf_byp", 15);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_hf_ls_byp", 15);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_lf_ls_byp", 15);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_lf_byp", 15);
cvmx_qlm_jtag_set(qlm, -1, "rx_cap_gen2", 0);
cvmx_qlm_jtag_set(qlm, -1, "rx_eq_gen2", 11);
cvmx_qlm_jtag_set(qlm, -1, "serdes_tx_byp", 1);
}
}
else if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_NIC68_4) {
for (qlm = 0; qlm < num_qlms; qlm++) {
#ifdef CVMX_QLM_DUMP_STATE
cvmx_dprintf("Setting tunning parameters for QLM%d\n", qlm);
#endif
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_hs_ls_byp", 30);
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_hf_byp", 30);
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_lf_ls_byp", 30);
cvmx_qlm_jtag_set(qlm, -1, "biasdrv_lf_byp", 30);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_hf_byp", 0);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_hf_ls_byp", 0);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_lf_ls_byp", 0);
cvmx_qlm_jtag_set(qlm, -1, "tcoeff_lf_byp", 0);
cvmx_qlm_jtag_set(qlm, -1, "rx_cap_gen2", 1);
cvmx_qlm_jtag_set(qlm, -1, "rx_eq_gen2", 8);
cvmx_qlm_jtag_set(qlm, -1, "serdes_tx_byp", 1);
}
}
#endif
}
/* G-16094 QLM Gen2 Equalizer Default Setting Change */
else if (OCTEON_IS_MODEL(OCTEON_CN68XX_PASS1_X)
|| OCTEON_IS_MODEL(OCTEON_CN66XX_PASS1_X)) {
/* Loop through the QLMs */
for (qlm = 0; qlm < num_qlms; qlm++) {
/* Read the QLM speed */
qlm_cfg.u64 = cvmx_read_csr(CVMX_MIO_QLMX_CFG(qlm));
/* If the QLM is at 6.25Ghz or 5Ghz then program JTAG */
if ((qlm_cfg.s.qlm_spd == 5) || (qlm_cfg.s.qlm_spd == 12) || (qlm_cfg.s.qlm_spd == 0) || (qlm_cfg.s.qlm_spd == 6) || (qlm_cfg.s.qlm_spd == 11)) {
cvmx_qlm_jtag_set(qlm, -1, "rx_cap_gen2", 0x1);
cvmx_qlm_jtag_set(qlm, -1, "rx_eq_gen2", 0x8);
}
}
}
}
