mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-22 20:31:14 +00:00
fusee: sdmmc: clean up and prepare for better SD/MMC/version separations
This commit is contained in:
Kate J. Temkin
parent
ae830fea95
commit
bceb00ad8d
2 changed files with 182 additions and 189 deletions
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@ -248,6 +248,7 @@ enum sdmmc_command {
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CMD_APP_COMMAND = 55,
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};
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/**
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* String descriptions of each command.
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*/
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@ -274,44 +275,6 @@ static const char *sdmmc_command_string[] = {
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};
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/**
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* Methods by which we can touch registers accessed via.
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* CMD_SWITCH_MODE.
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*/
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enum sdmmc_switch_access_mode {
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/* Normal commands */
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MMC_SWITCH_MODE_CMD_SET = 0,
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MMC_SWITCH_MODE_SET_BITS = 1,
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MMC_SWITCH_MODE_CLEAR_BITS = 2,
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MMC_SWITCH_MODE_WRITE_BYTE = 3,
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/* EXTCSD access */
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MMC_SWITCH_EXTCSD_NORMAL = 1,
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};
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/**
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* Offsets into the SWITCH_MODE argument.
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*/
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enum sdmmc_switch_argument_offsets {
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MMC_SWITCH_VALUE_SHIFT = 0,
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MMC_SWITCH_FIELD_SHIFT = 16,
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MMC_SWITCH_ACCESS_MODE_SHIFT = 24,
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};
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/**
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* Fields that can be modified by CMD_SWITCH_MODE.
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*/
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enum sdmmc_switch_field {
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/* Fields */
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MMC_GROUP_ERASE_DEF = 175,
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MMC_PARTITION_CONFIG = 179,
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MMC_BUS_WIDTH = 183,
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};
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/**
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* SDMMC command argument numbers
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*/
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@ -397,9 +360,6 @@ enum sdmmc_ext_csd_extents {
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};
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/* Forward declarations. */
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static int sdmmc_switch_mode(struct mmc *mmc, enum sdmmc_switch_access_mode mode, enum sdmmc_switch_field field, uint16_t value, uint32_t timeout);
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/* SDMMC debug enable */
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static int sdmmc_loglevel = 0;
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@ -486,6 +446,7 @@ static const char *sdmmc_get_command_string(enum sdmmc_command command)
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}
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}
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/**
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* Debug: print out any errors that occurred during a command timeout
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*/
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@ -548,7 +509,7 @@ static int sdmmc_hardware_reset(struct mmc *mmc)
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/**
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* Performs low-level initialization for SDMMC4, used for the eMMC.
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*/
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static int sdmmc4_hardware_init(struct mmc *mmc)
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static int sdmmc4_set_up_clock_and_io(struct mmc *mmc)
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{
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volatile struct tegra_car *car = car_get_regs();
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volatile struct tegra_padctl *padctl = padctl_get_regs();
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@ -582,6 +543,16 @@ static int sdmmc4_hardware_init(struct mmc *mmc)
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}
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/**
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* Enables power supplies for SDMMC4, used for eMMC.
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*/
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static int sdmmc4_enable_supplies(struct mmc *mmc)
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{
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// As a booot device, SDMMC4's power supply is always on.
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return 0;
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}
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/**
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* Enables power supplies for SDMMC1, used for the SD card slot.
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*/
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@ -611,7 +582,7 @@ static int sdmmc1_enable_supplies(struct mmc *mmc)
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/**
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* Performs low-level initialization for SDMMC1, used for the SD card slot.
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*/
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static int sdmmc1_hardware_init(struct mmc *mmc)
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static int sdmmc1_set_up_clock_and_io(struct mmc *mmc)
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{
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volatile struct tegra_car *car = car_get_regs();
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volatile struct tegra_pinmux *pinmux = pinmux_get_regs();
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@ -668,49 +639,6 @@ static int sdmmc1_hardware_init(struct mmc *mmc)
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}
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/**
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* Sets up the I/O and clocking resources necessary to use the given controller.
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*/
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static int sdmmc_setup_controller_clock_and_io(struct mmc *mmc)
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{
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// Always use the per-controller initialization functions.
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switch (mmc->controller) {
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case SWITCH_MICROSD:
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return sdmmc1_hardware_init(mmc);
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case SWITCH_EMMC:
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return sdmmc4_hardware_init(mmc);
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default:
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mmc_print(mmc, "initializing an unsupport SDMMC controller!");
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return ENODEV;
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}
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return 0;
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}
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/**
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* Sets up the I/O and clocking resources necessary to use the given controller.
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*/
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static int sdmmc_enable_supplies(struct mmc *mmc)
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{
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// Always use the per-controller initialization functions.
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switch (mmc->controller) {
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case SWITCH_MICROSD:
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return sdmmc1_enable_supplies(mmc);
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// As a boot device, the eMMC is always on.
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case SWITCH_EMMC:
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return 0;
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default:
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mmc_print(mmc, "trying to power on an unsupported controller!");
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return ENODEV;
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}
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return 0;
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}
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/**
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* Configures clocking parameters for a given controller.
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*
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@ -718,6 +646,8 @@ static int sdmmc_enable_supplies(struct mmc *mmc)
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*/
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static int sdmmc_set_up_clocking_parameters(struct mmc *mmc)
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{
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// TODO: decide if these should be split into separate functions after seeing how much
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// is common to the tunable modes
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// TODO: timing for HS400/HS667 modes
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// TODO: timing for tuanble modes (SDR50/104/200)
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@ -748,8 +678,6 @@ static int sdmmc_set_up_clocking_parameters(struct mmc *mmc)
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}
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/**
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* Initialize the low-level SDMMC hardware.
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* Thanks to hexkyz for this init code.
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@ -766,7 +694,7 @@ static int sdmmc_hardware_init(struct mmc *mmc)
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int rc;
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// Initialize the Tegra resources necessary to use the given piece of hardware.
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rc = sdmmc_setup_controller_clock_and_io(mmc);
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rc = mmc->set_up_clock_and_io(mmc);
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if (rc) {
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mmc_print(mmc, "ERROR: could not set up controller for use!");
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return rc;
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@ -780,7 +708,7 @@ static int sdmmc_hardware_init(struct mmc *mmc)
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}
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// Turn on the card's power supplies...
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rc = sdmmc_enable_supplies(mmc);
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rc = mmc->enable_supplies(mmc);
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if (rc) {
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mmc_print(mmc, "ERROR: could power on the card!");
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return rc;
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@ -1585,7 +1513,6 @@ static int sdmmc_read_and_parse_csd(struct mmc *mmc)
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}
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/**
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* Reads the active MMC card's Card Specific Data, and updates the MMC object's properties.
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*
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@ -1642,6 +1569,7 @@ static int sdmmc_set_up_block_transfer_size(struct mmc *mmc)
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return 0;
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}
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/**
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* Switches the SDMMC card and controller to the fullest bus width possible.
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*
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@ -1650,7 +1578,7 @@ static int sdmmc_set_up_block_transfer_size(struct mmc *mmc)
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static int sdmmc_switch_bus_width(struct mmc *mmc, enum sdmmc_bus_width width)
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{
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// Ask the card to adjust to the wider bus width.
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int rc = sdmmc_switch_mode(mmc, MMC_SWITCH_EXTCSD_NORMAL,
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int rc = mmc->switch_mode(mmc, MMC_SWITCH_EXTCSD_NORMAL,
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MMC_BUS_WIDTH, width, mmc->timeout);
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if (rc) {
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mmc_print(mmc, "could not switch mode on the card side!");
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@ -1714,7 +1642,7 @@ static int sdmmc_set_up_partitions(struct mmc *mmc)
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mmc_print(mmc, "detected a card with hardware partitions.");
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// Use partitioning.
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return sdmmc_switch_mode(mmc, MMC_SWITCH_EXTCSD_NORMAL,
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return mmc->switch_mode(mmc, MMC_SWITCH_EXTCSD_NORMAL,
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MMC_GROUP_ERASE_DEF, MMC_EXT_CSD_ERASE_GROUP_DEF_BIT, mmc->timeout);
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}
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@ -1768,30 +1696,6 @@ static int sdmmc_get_relative_address(struct mmc *mmc)
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}
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/**
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* Establishes a relative address that can be used to communicate with a
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* given card-- either by using or replacing mmc->relative_address.
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*
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* @param mmc The MMC controller to work with.
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* @return 0 on success, or an error code on failure.
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*/
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static int sdmmc_get_or_set_relative_address(struct mmc *mmc)
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{
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// The SD and MMC specifications handle relative address assignemnt
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// differently-- delegate accordingly.
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switch (mmc->card_type) {
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case MMC_CARD_EMMC:
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case MMC_CARD_MMC:
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return sdmmc_set_relative_address(mmc);
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case MMC_CARD_SD:
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return sdmmc_get_relative_address(mmc);
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default:
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mmc_print(mmc, "cannot figure out how to set up an relative address for TYPE%d devices", mmc->card_type);
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return ENODEV;
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}
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}
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/**
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* Retrieves information about the card, and populates the MMC structure accordingly.
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* Used as part of the SDMMC initialization process.
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@ -1812,7 +1716,7 @@ static int sdmmc_card_init(struct mmc *mmc)
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memcpy(mmc->cid, response, sizeof(mmc->cid));
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// Establish a relative address to communicate with
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rc = sdmmc_get_or_set_relative_address(mmc);
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rc = mmc->establish_relative_address(mmc);
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if (rc) {
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mmc_print(mmc, "could not establish a relative address! (%d)", rc);
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return rc;
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@ -1918,7 +1822,6 @@ static int sdmmc_sd_wait_for_card_readiness(struct mmc *mmc, uint32_t *response)
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}
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/**
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* Handles MMC-specific card initialization.
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*/
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@ -2050,44 +1953,6 @@ static int sdmmc_sd_card_init(struct mmc *mmc)
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}
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/**
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* Handle any speciailized initialization required by the given device type.
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*
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* @param mmc The device to initialize.
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*/
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static int sdmmc_handle_card_type_init(struct mmc *mmc)
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{
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int rc;
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switch (mmc->card_type) {
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// Handle initialization of eMMC cards.
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case MMC_CARD_EMMC:
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// FIXME: also handle MMC and SD cards that aren't eMMC
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rc = sdmmc_mmc_card_init(mmc);
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break;
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// Handle initialization of SD.
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case MMC_CARD_SD:
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rc = sdmmc_sd_card_init(mmc);
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break;
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default:
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mmc_print(mmc,"initialization of this device not yet supported!");
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rc = ENOTTY;
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break;
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}
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return rc;
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}
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/**
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* @returns true iff the given READ_STATUS response indicates readiness
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*/
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@ -2150,7 +2015,7 @@ static int sdmmc_wait_for_card_ready(struct mmc *mmc, uint32_t timeout)
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*
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* @return 0 on success, or an error code on failure
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*/
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static int sdmmc_switch_mode(struct mmc *mmc, enum sdmmc_switch_access_mode mode, enum sdmmc_switch_field field, uint16_t value, uint32_t timeout)
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static int sdmmc_mmc_switch_mode(struct mmc *mmc, enum sdmmc_switch_access_mode mode, enum sdmmc_switch_field field, uint16_t value, uint32_t timeout)
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{
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// Collapse our various parameters into a single argument.
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uint32_t argument =
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@ -2178,6 +2043,25 @@ static int sdmmc_switch_mode(struct mmc *mmc, enum sdmmc_switch_access_mode mode
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}
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/**
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* Issues a SWITCH_MODE command, which can be used to write registers on the SD card's controller,
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* and thus to e.g. switch partitions.
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*
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* @param mmc The MMC device to use for comms.
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* @param mode The access mode with which to access the controller.
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* @param field The field to access.
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* @param value The argument to the access mode.
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* @param timeout The timeout, which is often longer than the normal MMC timeout.
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*
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* @return 0 on success, or an error code on failure
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*/
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static int sdmmc_sd_switch_mode(struct mmc *mmc, enum sdmmc_switch_access_mode mode, enum sdmmc_switch_field field, uint16_t value, uint32_t timeout)
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{
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mmc_print(mmc, "ERROR: SD card mode switching not yet implemented");
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return ENOSYS;
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}
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/**
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* @return True iff the given MMC card supports hardare partitions.
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*/
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@ -2187,22 +2071,80 @@ static bool sdmmc_supports_hardware_partitions(struct mmc *mmc)
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}
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/**
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* card detect method for built-in cards.
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*/
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bool sdmmc_builtin_card_present(struct mmc *mmc)
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{
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return true;
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}
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/**
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* card detect method for GPIO-based card detects
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*/
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bool sdmmc_external_card_present(struct mmc *mmc)
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{
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return !gpio_read(mmc->card_detect_gpio);
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}
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/**
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* Switches a given SDMMC Controller where
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*/
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static void sdmmc_apply_card_type(struct mmc *mmc, enum sdmmc_card_type type)
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{
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// Store the card type for our own reference...
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mmc->card_type = type;
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// Set up our per-protocol function pointers.
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switch (type) {
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// MMC-protoco cards
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case MMC_CARD_EMMC:
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case MMC_CARD_MMC:
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mmc->card_init = sdmmc_mmc_card_init;
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mmc->establish_relative_address = sdmmc_set_relative_address;
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mmc->switch_mode = sdmmc_mmc_switch_mode;
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break;
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// SD-protocol cards
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case MMC_CARD_SD:
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mmc->card_init = sdmmc_sd_card_init;
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mmc->establish_relative_address = sdmmc_get_relative_address;
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mmc->switch_mode = sdmmc_sd_switch_mode;
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break;
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// Switch-cart protocol cards
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case MMC_CARD_CART:
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printk("BUG: trying to use an impossible code path!\n");
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panic(0);
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}
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}
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/**
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* Populates the given MMC object with defaults for its controller.
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*
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* @param mmc The mmc object to populate.
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*/
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static void sdmmc_initialize_defaults(struct mmc *mmc)
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static int sdmmc_initialize_defaults(struct mmc *mmc)
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{
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// Set up based on the controller
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switch (mmc->controller) {
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case SWITCH_EMMC:
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mmc->name = "eMMC";
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mmc->card_type = MMC_CARD_EMMC;
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mmc->max_bus_width = MMC_BUS_WIDTH_8BIT;
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mmc->operating_voltage = MMC_VOLTAGE_1V8;
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mmc->card_detect_gpio = GPIO_MICROSD_CARD_DETECT;
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// The Switch's eMMC always uses block addressin.g
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// Set up function pointers for each of our per-instance functions.
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mmc->set_up_clock_and_io = sdmmc4_set_up_clock_and_io;
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mmc->enable_supplies = sdmmc4_enable_supplies;
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mmc->card_present = sdmmc_external_card_present;
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// The EMMC controller always uses an EMMC card.
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sdmmc_apply_card_type(mmc, MMC_CARD_EMMC);
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// The Switch's eMMC always uses block addressing.
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mmc->uses_block_addressing = true;
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break;
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@ -2212,15 +2154,23 @@ static void sdmmc_initialize_defaults(struct mmc *mmc)
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mmc->max_bus_width = MMC_BUS_WIDTH_4BIT;
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mmc->operating_voltage = MMC_VOLTAGE_3V3;
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// For the microSD card slot, assume we have an SD-type card.
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// Negotiation has a chance to change this, later.
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mmc->set_up_clock_and_io = sdmmc1_set_up_clock_and_io;
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mmc->enable_supplies = sdmmc1_enable_supplies;
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sdmmc_apply_card_type(mmc, MMC_CARD_SD);
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// Start off assuming byte addressing; we'll detect and correct this
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// later, if necessary.
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mmc->uses_block_addressing = false;
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break;
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default:
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printk("ERROR: initialization not yet writen for SDMMC%d", mmc->controller);
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break;
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printk("ERROR: initialization not yet writen for SDMMC%d", mmc->controller + 1);
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return ENOSYS;
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}
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return 0;
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}
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@ -2239,7 +2189,14 @@ int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller)
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// Get a reference to the registers for the relevant SDMMC controller.
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mmc->controller = controller;
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mmc->regs = sdmmc_get_regs(controller);
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sdmmc_initialize_defaults(mmc);
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// Set the defaults for the card, including the default function pointers
|
||||
// for the assumed card type, and the per-controller options.
|
||||
rc = sdmmc_initialize_defaults(mmc);
|
||||
if (rc) {
|
||||
printk("ERROR: controller SDMMC%d not currently supported!\n", controller + 1);
|
||||
return rc;
|
||||
}
|
||||
|
||||
// Default to a timeout of 1S.
|
||||
mmc->timeout = 1000000;
|
||||
|
|
@ -2262,7 +2219,7 @@ int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller)
|
|||
}
|
||||
|
||||
// Handle the initialization that's specific to the card type.
|
||||
rc = sdmmc_handle_card_type_init(mmc);
|
||||
rc = mmc->card_init(mmc);
|
||||
if (rc) {
|
||||
mmc_print(mmc, "failed to set run card-specific initialization (%d)!", rc);
|
||||
return rc;
|
||||
|
|
@ -2293,7 +2250,7 @@ int sdmmc_select_partition(struct mmc *mmc, enum sdmmc_partition partition)
|
|||
|
||||
// Set the PARTITION_CONFIG register to select the active partition.
|
||||
mmc_print(mmc, "switching to partition %d", partition);
|
||||
rc = sdmmc_switch_mode(mmc, MMC_SWITCH_EXTCSD_NORMAL, MMC_PARTITION_CONFIG, argument, 0);
|
||||
rc = mmc->switch_mode(mmc, MMC_SWITCH_EXTCSD_NORMAL, MMC_PARTITION_CONFIG, argument, 0);
|
||||
if (rc) {
|
||||
mmc_print(mmc, "failed to select partition %d (%02x, rc=%d)", partition, argument, rc);
|
||||
}
|
||||
|
|
@ -2388,7 +2345,6 @@ int sdmmc_write(struct mmc *mmc, void *buffer, uint32_t block, unsigned int coun
|
|||
return sdmmc_send_command(mmc, command, MMC_RESPONSE_LEN48, MMC_CHECKS_ALL, extent, NULL, count, true, count > 1, buffer);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Checks to see whether an SD card is present.
|
||||
*
|
||||
|
|
@ -2397,18 +2353,5 @@ int sdmmc_write(struct mmc *mmc, void *buffer, uint32_t block, unsigned int coun
|
|||
*/
|
||||
bool sdmmc_card_present(struct mmc *mmc)
|
||||
{
|
||||
switch (mmc->controller) {
|
||||
|
||||
// The eMMC is always present.
|
||||
case SWITCH_EMMC:
|
||||
return true;
|
||||
|
||||
// The Switch's microSD card has a GPIO card detect pin.
|
||||
case SWITCH_MICROSD:
|
||||
return !gpio_read(GPIO_MICROSD_CARD_DETECT);
|
||||
|
||||
default:
|
||||
mmc_print(mmc, "cannot figure out how to determine card presence!");
|
||||
return false;
|
||||
}
|
||||
return mmc->card_present(mmc);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -9,6 +9,7 @@
|
|||
#include <stdbool.h>
|
||||
#include <stdint.h>
|
||||
#include "utils.h"
|
||||
#include "gpio.h"
|
||||
|
||||
/* Opaque pointer to the Tegra SDMMC registers */
|
||||
struct tegra_sdmmc;
|
||||
|
|
@ -83,6 +84,44 @@ enum sdmmc_write_permission {
|
|||
};
|
||||
|
||||
|
||||
/**
|
||||
* Methods by which we can touch registers accessed via.
|
||||
* CMD_SWITCH_MODE.
|
||||
*/
|
||||
enum sdmmc_switch_access_mode {
|
||||
|
||||
/* Normal commands */
|
||||
MMC_SWITCH_MODE_CMD_SET = 0,
|
||||
MMC_SWITCH_MODE_SET_BITS = 1,
|
||||
MMC_SWITCH_MODE_CLEAR_BITS = 2,
|
||||
MMC_SWITCH_MODE_WRITE_BYTE = 3,
|
||||
|
||||
/* EXTCSD access */
|
||||
MMC_SWITCH_EXTCSD_NORMAL = 1,
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Offsets into the SWITCH_MODE argument.
|
||||
*/
|
||||
enum sdmmc_switch_argument_offsets {
|
||||
MMC_SWITCH_VALUE_SHIFT = 0,
|
||||
MMC_SWITCH_FIELD_SHIFT = 16,
|
||||
MMC_SWITCH_ACCESS_MODE_SHIFT = 24,
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Fields that can be modified by CMD_SWITCH_MODE.
|
||||
*/
|
||||
enum sdmmc_switch_field {
|
||||
/* Fields */
|
||||
MMC_GROUP_ERASE_DEF = 175,
|
||||
MMC_PARTITION_CONFIG = 179,
|
||||
MMC_BUS_WIDTH = 183,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Primary data structure describing a Fusée MMC driver.
|
||||
|
|
@ -92,11 +131,23 @@ struct mmc {
|
|||
|
||||
/* Controller properties */
|
||||
char *name;
|
||||
unsigned int timeout;
|
||||
enum sdmmc_card_type card_type;
|
||||
bool use_dma;
|
||||
unsigned int timeout;
|
||||
enum tegra_named_gpio card_detect_gpio;
|
||||
enum sdmmc_card_type card_type;
|
||||
enum sdmmc_write_permission write_enable;
|
||||
|
||||
/* Per-controller operations. */
|
||||
int (*set_up_clock_and_io)(struct mmc *mmc);
|
||||
int (*enable_supplies)(struct mmc *mmc);
|
||||
bool (*card_present)(struct mmc *mmc);
|
||||
|
||||
/* Per-card-type operations */
|
||||
int (*card_init)(struct mmc *mmc);
|
||||
int (*establish_relative_address)(struct mmc *mmc);
|
||||
int (*switch_mode)(struct mmc *mmc, enum sdmmc_switch_access_mode mode,
|
||||
enum sdmmc_switch_field field, uint16_t value, uint32_t timeout);
|
||||
|
||||
/* Card properties */
|
||||
uint8_t cid[15];
|
||||
uint32_t relative_address;
|
||||
|
|
@ -130,13 +181,12 @@ struct mmc;
|
|||
* Parititions supported by the Switch eMMC.
|
||||
*/
|
||||
enum sdmmc_partition {
|
||||
MMC_PARTITION_USER = 0,
|
||||
MMC_PARTITION_BOOT1 = 1,
|
||||
MMC_PARITTION_BOOT2 = 2,
|
||||
SDMMC_PARTITION_USER = 0,
|
||||
SDMMC_PARTITION_BOOT0 = 1,
|
||||
SDMMC_PARTITION_BOOT1 = 2,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Sets the current SDMMC debugging loglevel.
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in a new issue