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mtd: nand: Add a few more timings to nand_sdr_timings
Add the tR_max, tBERS_max, tPROG_max and tCCS_min timings to the nand_sdr_timings struct. Assign default/safe values for the statically defined timings, and extract them from the ONFI parameter table if the NAND is ONFI compliant. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Tested-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
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@ -18,6 +18,8 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
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{
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.type = NAND_SDR_IFACE,
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.timings.sdr = {
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.tCCS_min = 500000,
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.tR_max = 200000000,
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.tADL_min = 400000,
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.tALH_min = 20000,
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.tALS_min = 50000,
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@ -58,6 +60,8 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
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{
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.type = NAND_SDR_IFACE,
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.timings.sdr = {
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.tCCS_min = 500000,
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.tR_max = 200000000,
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.tADL_min = 400000,
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.tALH_min = 10000,
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.tALS_min = 25000,
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@ -98,6 +102,8 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
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{
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.type = NAND_SDR_IFACE,
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.timings.sdr = {
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.tCCS_min = 500000,
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.tR_max = 200000000,
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.tADL_min = 400000,
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.tALH_min = 10000,
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.tALS_min = 15000,
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@ -138,6 +144,8 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
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{
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.type = NAND_SDR_IFACE,
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.timings.sdr = {
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.tCCS_min = 500000,
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.tR_max = 200000000,
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.tADL_min = 400000,
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.tALH_min = 5000,
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.tALS_min = 10000,
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@ -178,6 +186,8 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
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{
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.type = NAND_SDR_IFACE,
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.timings.sdr = {
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.tCCS_min = 500000,
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.tR_max = 200000000,
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.tADL_min = 400000,
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.tALH_min = 5000,
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.tALS_min = 10000,
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@ -218,6 +228,8 @@ static const struct nand_data_interface onfi_sdr_timings[] = {
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{
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.type = NAND_SDR_IFACE,
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.timings.sdr = {
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.tCCS_min = 500000,
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.tR_max = 200000000,
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.tADL_min = 400000,
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.tALH_min = 5000,
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.tALS_min = 10000,
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@ -290,10 +302,22 @@ int onfi_init_data_interface(struct nand_chip *chip,
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*iface = onfi_sdr_timings[timing_mode];
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/*
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* TODO: initialize timings that cannot be deduced from timing mode:
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* Initialize timings that cannot be deduced from timing mode:
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* tR, tPROG, tCCS, ...
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* These information are part of the ONFI parameter page.
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*/
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if (chip->onfi_version) {
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struct nand_onfi_params *params = &chip->onfi_params;
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struct nand_sdr_timings *timings = &iface->timings.sdr;
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/* microseconds -> picoseconds */
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timings->tPROG_max = 1000000UL * le16_to_cpu(params->t_prog);
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timings->tBERS_max = 1000000UL * le16_to_cpu(params->t_bers);
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timings->tR_max = 1000000UL * le16_to_cpu(params->t_r);
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/* nanoseconds -> picoseconds */
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timings->tCCS_min = 1000UL * le16_to_cpu(params->t_ccs);
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}
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return 0;
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}
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@ -584,6 +584,10 @@ struct nand_buffers {
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*
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* All these timings are expressed in picoseconds.
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*
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* @tBERS_max: Block erase time
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* @tCCS_min: Change column setup time
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* @tPROG_max: Page program time
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* @tR_max: Page read time
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* @tALH_min: ALE hold time
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* @tADL_min: ALE to data loading time
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* @tALS_min: ALE setup time
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@ -621,6 +625,10 @@ struct nand_buffers {
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* @tWW_min: WP# transition to WE# low
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*/
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struct nand_sdr_timings {
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u32 tBERS_max;
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u32 tCCS_min;
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u32 tPROG_max;
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u32 tR_max;
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u32 tALH_min;
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u32 tADL_min;
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u32 tALS_min;
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