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mmc: Disable CMD23 transfers on all cards Pending wire-level investigation of these types of transfers and associated errors on bcm2835-mmc, disable for now. Fallback of CMD18/CMD25 transfers will be used automatically by the MMC layer. Reported/Tested-by: Gellert Weisz <gellert@raspberrypi.org> mmc: bcm2835-mmc: enable DT support for all architectures Both ARCH_BCM2835 and ARCH_BCM270x are built with OF now. Enable Device Tree support for all architectures. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> mmc: bcm2835-mmc: fix probe error handling Probe error handling is broken in several places. Simplify error handling by using device managed functions. Replace pr_{err,info} with dev_{err,info}. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> bcm2835-mmc: Add locks when accessing sdhost registers bcm2835-mmc: Add range of debug options for slowing things down bcm2835-mmc: Add option to disable some delays bcm2835-mmc: Add option to disable MMC_QUIRK_BLK_NO_CMD23 bcm2835-mmc: Default to disabling MMC_QUIRK_BLK_NO_CMD23 bcm2835-mmc: Adding overclocking option Allow a different clock speed to be substitued for a requested 50MHz. This option is exposed using the "overclock_50" DT parameter. Note that the mmc interface is restricted to EVEN integer divisions of 250MHz, and the highest sensible option is 63 (250/4 = 62.5), the next being 125 (250/2) which is much too high. Use at your own risk. bcm2835-mmc: Round up the overclock, so 62 works for 62.5Mhz Also only warn once for each overclock setting. mmc: bcm2835-mmc: Make available on ARCH_BCM2835 Make the bcm2835-mmc driver available for use on ARCH_BCM2835. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> BCM270x_DT: add bcm2835-mmc entry Add Device Tree entry for bcm2835-mmc. In non-DT mode, don't add the device in the board file. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> bcm2835-mmc: Don't overwrite MMC capabilities from DT bcm2835-mmc: Don't override bus width capabilities from devicetree Take out the force setting of the MMC_CAP_4_BIT_DATA host capability so that the result read from devicetree via mmc_of_parse() is preserved. bcm2835-mmc: Only claim one DMA channel With both MMC controllers enabled there are few DMA channels left. The bcm2835-mmc driver only uses DMA in one direction at a time, so it doesn't need to claim two channels. See: https://github.com/raspberrypi/linux/issues/1327 Signed-off-by: Phil Elwell <phil@raspberrypi.org> bcm2835-mmc: New timer API mmc: bcm2835-mmc: Support underclocking Support underclocking of the SD bus using the max-frequency DT property (which currently has no DT parameter). The sd_overclock parameter already provides another way to achieve the same thing which should be equivalent in end result, but it is a bug not to support max-frequency as well. See: https://github.com/raspberrypi/linux/issues/2350 Signed-off-by: Phil Elwell <phil@raspberrypi.org> mmc/bcm2835: Recover from MMC_SEND_EXT_CSD If the user issues an "mmc extcsd read", the SD controller receives what it thinks is a SEND_IF_COND command with an unexpected data block. The resulting operations leave the FSM stuck in READWAIT, a state which persists until the MMC framework resets the controller, by which point the root filesystem is likely to have been unmounted. A less heavyweight solution is to detect the condition and nudge the FSM by asserting the (self-clearing) FORCE_DATA_MODE bit. N.B. This workaround was essentially discovered by accident and without a full understanding the inner workings of the controller, so it is fortunate that the "fix" only modifies error paths. See: https://github.com/raspberrypi/linux/issues/2728 Signed-off-by: Phil Elwell <phil@raspberrypi.org> bcm2835-mmc: Fix DMA channel leak The BCM2835 MMC host driver requests a DMA channel on probe but neglects to release the channel in the probe error path and on driver unbind. I'm seeing this happen on every boot of the Compute Module 3: On first driver probe, DMA channel 2 is allocated and then leaked with a "could not get clk, deferring probe" message. On second driver probe, channel 4 is allocated. Fix it. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> bcm2835-mmc: Fix struct mmc_host leak on probe The BCM2835 MMC host driver requests the bus address of the host's register map on probe. If that fails, the driver leaks the struct mmc_host allocated earlier. Fix it. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> bcm2835-mmc: Fix duplicate free_irq() on remove The BCM2835 MMC host driver requests its interrupt as a device-managed resource, so the interrupt is automatically freed after the driver is unbound. However on driver unbind, bcm2835_mmc_remove() frees the interrupt explicitly to avoid invocation of the interrupt handler after driver structures have been torn down. The interrupt is thus freed twice, leading to a WARN splat in __free_irq(). Fix by not requesting the interrupt as a device-managed resource. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> bcm2835-mmc: Handle mmc_add_host() errors The BCM2835 MMC host driver calls mmc_add_host() but doesn't check its return value. Errors occurring in that function are therefore not handled. Fix it. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> bcm2835-mmc: Deduplicate reset of driver data on remove The BCM2835 MMC host driver sets the device's driver data pointer to NULL on ->remove() even though the driver core subsequently does the same in __device_release_driver(). Drop the duplicate assignment. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> bcm2835_mmc: Remove vestigial threaded IRQ With SDIO processing now managed by the MMC framework with a workqueue, the bcm2835_mmc driver no longer needs a threaded IRQ. Signed-off-by: Phil Elwell <phil@raspberrypi.org> Add missing dma_unmap_sg calls to free relevant swiotlb bounce buffers. This prevents DMA leaks. Signed-off-by: Yaroslav Rosomakho <yaroslavros@gmail.com> Limit max_req_size under arm64 (or any other platform that uses swiotlb) to prevent potential buffer overflow due to bouncing. Signed-off-by: Yaroslav Rosomakho <yaroslavros@gmail.com> mmc: sdhci: Silence MMC warnings When the MMC isn't plugged in, the driver will spam the console which is pretty annoying when using NFS. Signed-off-by: Maxime Ripard <maxime@cerno.tech> mmc: sdhci-iproc: Fix vmmc regulators on iProc The Linux support for controlling card power via regulators appears to be contentious. I would argue that the default behaviour is contrary to the SDHCI spec - turning off the power writes a reserved value to the SD Bus Voltage Select field of the Power Control Register, which seems to kill the Arasan/iProc controller - but fortunately there is a hook in sdhci_ops to override the behaviour. Borrow the implementation from sdhci_arasan_set_power. Signed-off-by: Phil Elwell <phil@raspberrypi.org> bcm2835-mmc: uninitialized_var is no more
355 lines
12 KiB
C
355 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/include/linux/mmc/card.h
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*
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* Card driver specific definitions.
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*/
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#ifndef LINUX_MMC_CARD_H
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#define LINUX_MMC_CARD_H
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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struct mmc_cid {
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unsigned int manfid;
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char prod_name[8];
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unsigned char prv;
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unsigned int serial;
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unsigned short oemid;
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unsigned short year;
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unsigned char hwrev;
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unsigned char fwrev;
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unsigned char month;
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};
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struct mmc_csd {
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unsigned char structure;
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unsigned char mmca_vsn;
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unsigned short cmdclass;
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unsigned short taac_clks;
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unsigned int taac_ns;
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unsigned int c_size;
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unsigned int r2w_factor;
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unsigned int max_dtr;
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unsigned int erase_size; /* In sectors */
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unsigned int read_blkbits;
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unsigned int write_blkbits;
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unsigned int capacity;
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unsigned int read_partial:1,
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read_misalign:1,
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write_partial:1,
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write_misalign:1,
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dsr_imp:1;
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};
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struct mmc_ext_csd {
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u8 rev;
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u8 erase_group_def;
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u8 sec_feature_support;
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u8 rel_sectors;
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u8 rel_param;
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bool enhanced_rpmb_supported;
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u8 part_config;
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u8 cache_ctrl;
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u8 rst_n_function;
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u8 max_packed_writes;
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u8 max_packed_reads;
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u8 packed_event_en;
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unsigned int part_time; /* Units: ms */
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unsigned int sa_timeout; /* Units: 100ns */
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unsigned int generic_cmd6_time; /* Units: 10ms */
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unsigned int power_off_longtime; /* Units: ms */
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u8 power_off_notification; /* state */
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unsigned int hs_max_dtr;
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unsigned int hs200_max_dtr;
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#define MMC_HIGH_26_MAX_DTR 26000000
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#define MMC_HIGH_52_MAX_DTR 52000000
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#define MMC_HIGH_DDR_MAX_DTR 52000000
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#define MMC_HS200_MAX_DTR 200000000
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unsigned int sectors;
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unsigned int hc_erase_size; /* In sectors */
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unsigned int hc_erase_timeout; /* In milliseconds */
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unsigned int sec_trim_mult; /* Secure trim multiplier */
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unsigned int sec_erase_mult; /* Secure erase multiplier */
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unsigned int trim_timeout; /* In milliseconds */
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bool partition_setting_completed; /* enable bit */
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unsigned long long enhanced_area_offset; /* Units: Byte */
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unsigned int enhanced_area_size; /* Units: KB */
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unsigned int cache_size; /* Units: KB */
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bool hpi_en; /* HPI enablebit */
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bool hpi; /* HPI support bit */
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unsigned int hpi_cmd; /* cmd used as HPI */
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bool bkops; /* background support bit */
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bool man_bkops_en; /* manual bkops enable bit */
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bool auto_bkops_en; /* auto bkops enable bit */
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unsigned int data_sector_size; /* 512 bytes or 4KB */
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unsigned int data_tag_unit_size; /* DATA TAG UNIT size */
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unsigned int boot_ro_lock; /* ro lock support */
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bool boot_ro_lockable;
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bool ffu_capable; /* Firmware upgrade support */
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bool cmdq_en; /* Command Queue enabled */
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bool cmdq_support; /* Command Queue supported */
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unsigned int cmdq_depth; /* Command Queue depth */
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#define MMC_FIRMWARE_LEN 8
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u8 fwrev[MMC_FIRMWARE_LEN]; /* FW version */
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u8 raw_exception_status; /* 54 */
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u8 raw_partition_support; /* 160 */
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u8 raw_rpmb_size_mult; /* 168 */
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u8 raw_erased_mem_count; /* 181 */
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u8 strobe_support; /* 184 */
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u8 raw_ext_csd_structure; /* 194 */
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u8 raw_card_type; /* 196 */
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u8 raw_driver_strength; /* 197 */
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u8 out_of_int_time; /* 198 */
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u8 raw_pwr_cl_52_195; /* 200 */
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u8 raw_pwr_cl_26_195; /* 201 */
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u8 raw_pwr_cl_52_360; /* 202 */
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u8 raw_pwr_cl_26_360; /* 203 */
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u8 raw_s_a_timeout; /* 217 */
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u8 raw_hc_erase_gap_size; /* 221 */
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u8 raw_erase_timeout_mult; /* 223 */
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u8 raw_hc_erase_grp_size; /* 224 */
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u8 raw_boot_mult; /* 226 */
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u8 raw_sec_trim_mult; /* 229 */
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u8 raw_sec_erase_mult; /* 230 */
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u8 raw_sec_feature_support;/* 231 */
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u8 raw_trim_mult; /* 232 */
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u8 raw_pwr_cl_200_195; /* 236 */
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u8 raw_pwr_cl_200_360; /* 237 */
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u8 raw_pwr_cl_ddr_52_195; /* 238 */
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u8 raw_pwr_cl_ddr_52_360; /* 239 */
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u8 raw_pwr_cl_ddr_200_360; /* 253 */
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u8 raw_bkops_status; /* 246 */
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u8 raw_sectors[4]; /* 212 - 4 bytes */
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u8 pre_eol_info; /* 267 */
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u8 device_life_time_est_typ_a; /* 268 */
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u8 device_life_time_est_typ_b; /* 269 */
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unsigned int feature_support;
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#define MMC_DISCARD_FEATURE BIT(0) /* CMD38 feature */
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};
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struct sd_scr {
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unsigned char sda_vsn;
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unsigned char sda_spec3;
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unsigned char sda_spec4;
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unsigned char sda_specx;
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unsigned char bus_widths;
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#define SD_SCR_BUS_WIDTH_1 (1<<0)
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#define SD_SCR_BUS_WIDTH_4 (1<<2)
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unsigned char cmds;
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#define SD_SCR_CMD20_SUPPORT (1<<0)
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#define SD_SCR_CMD23_SUPPORT (1<<1)
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#define SD_SCR_CMD48_SUPPORT (1<<2)
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#define SD_SCR_CMD58_SUPPORT (1<<3)
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};
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struct sd_ssr {
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unsigned int au; /* In sectors */
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unsigned int erase_timeout; /* In milliseconds */
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unsigned int erase_offset; /* In milliseconds */
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};
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struct sd_switch_caps {
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unsigned int hs_max_dtr;
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unsigned int uhs_max_dtr;
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#define HIGH_SPEED_MAX_DTR 50000000
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#define UHS_SDR104_MAX_DTR 208000000
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#define UHS_SDR50_MAX_DTR 100000000
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#define UHS_DDR50_MAX_DTR 50000000
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#define UHS_SDR25_MAX_DTR UHS_DDR50_MAX_DTR
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#define UHS_SDR12_MAX_DTR 25000000
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#define DEFAULT_SPEED_MAX_DTR UHS_SDR12_MAX_DTR
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unsigned int sd3_bus_mode;
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#define UHS_SDR12_BUS_SPEED 0
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#define HIGH_SPEED_BUS_SPEED 1
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#define UHS_SDR25_BUS_SPEED 1
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#define UHS_SDR50_BUS_SPEED 2
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#define UHS_SDR104_BUS_SPEED 3
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#define UHS_DDR50_BUS_SPEED 4
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#define SD_MODE_HIGH_SPEED (1 << HIGH_SPEED_BUS_SPEED)
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#define SD_MODE_UHS_SDR12 (1 << UHS_SDR12_BUS_SPEED)
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#define SD_MODE_UHS_SDR25 (1 << UHS_SDR25_BUS_SPEED)
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#define SD_MODE_UHS_SDR50 (1 << UHS_SDR50_BUS_SPEED)
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#define SD_MODE_UHS_SDR104 (1 << UHS_SDR104_BUS_SPEED)
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#define SD_MODE_UHS_DDR50 (1 << UHS_DDR50_BUS_SPEED)
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unsigned int sd3_drv_type;
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#define SD_DRIVER_TYPE_B 0x01
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#define SD_DRIVER_TYPE_A 0x02
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#define SD_DRIVER_TYPE_C 0x04
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#define SD_DRIVER_TYPE_D 0x08
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unsigned int sd3_curr_limit;
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#define SD_SET_CURRENT_LIMIT_200 0
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#define SD_SET_CURRENT_LIMIT_400 1
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#define SD_SET_CURRENT_LIMIT_600 2
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#define SD_SET_CURRENT_LIMIT_800 3
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#define SD_SET_CURRENT_NO_CHANGE (-1)
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#define SD_MAX_CURRENT_200 (1 << SD_SET_CURRENT_LIMIT_200)
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#define SD_MAX_CURRENT_400 (1 << SD_SET_CURRENT_LIMIT_400)
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#define SD_MAX_CURRENT_600 (1 << SD_SET_CURRENT_LIMIT_600)
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#define SD_MAX_CURRENT_800 (1 << SD_SET_CURRENT_LIMIT_800)
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};
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struct sd_ext_reg {
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u8 fno;
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u8 page;
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u16 offset;
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u8 rev;
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u8 feature_enabled;
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u8 feature_support;
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/* Power Management Function. */
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#define SD_EXT_POWER_OFF_NOTIFY (1<<0)
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#define SD_EXT_POWER_SUSTENANCE (1<<1)
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#define SD_EXT_POWER_DOWN_MODE (1<<2)
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/* Performance Enhancement Function. */
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#define SD_EXT_PERF_FX_EVENT (1<<0)
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#define SD_EXT_PERF_CARD_MAINT (1<<1)
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#define SD_EXT_PERF_HOST_MAINT (1<<2)
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#define SD_EXT_PERF_CACHE (1<<3)
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#define SD_EXT_PERF_CMD_QUEUE (1<<4)
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};
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struct sdio_cccr {
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unsigned int sdio_vsn;
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unsigned int sd_vsn;
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unsigned int multi_block:1,
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low_speed:1,
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wide_bus:1,
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high_power:1,
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high_speed:1,
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disable_cd:1;
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};
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struct sdio_cis {
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unsigned short vendor;
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unsigned short device;
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unsigned short blksize;
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unsigned int max_dtr;
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};
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struct mmc_host;
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struct sdio_func;
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struct sdio_func_tuple;
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struct mmc_queue_req;
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#define SDIO_MAX_FUNCS 7
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/* The number of MMC physical partitions. These consist of:
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* boot partitions (2), general purpose partitions (4) and
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* RPMB partition (1) in MMC v4.4.
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*/
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#define MMC_NUM_BOOT_PARTITION 2
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#define MMC_NUM_GP_PARTITION 4
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#define MMC_NUM_PHY_PARTITION 7
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#define MAX_MMC_PART_NAME_LEN 20
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/*
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* MMC Physical partitions
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*/
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struct mmc_part {
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u64 size; /* partition size (in bytes) */
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unsigned int part_cfg; /* partition type */
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char name[MAX_MMC_PART_NAME_LEN];
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bool force_ro; /* to make boot parts RO by default */
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unsigned int area_type;
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#define MMC_BLK_DATA_AREA_MAIN (1<<0)
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#define MMC_BLK_DATA_AREA_BOOT (1<<1)
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#define MMC_BLK_DATA_AREA_GP (1<<2)
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#define MMC_BLK_DATA_AREA_RPMB (1<<3)
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};
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/*
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* MMC device
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*/
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struct mmc_card {
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struct mmc_host *host; /* the host this device belongs to */
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struct device dev; /* the device */
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u32 ocr; /* the current OCR setting */
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unsigned int rca; /* relative card address of device */
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unsigned int type; /* card type */
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#define MMC_TYPE_MMC 0 /* MMC card */
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#define MMC_TYPE_SD 1 /* SD card */
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#define MMC_TYPE_SDIO 2 /* SDIO card */
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#define MMC_TYPE_SD_COMBO 3 /* SD combo (IO+mem) card */
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unsigned int state; /* (our) card state */
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unsigned int quirks; /* card quirks */
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unsigned int quirk_max_rate; /* max rate set by quirks */
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#define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 writes outside of the VS CCCR range */
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#define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1) /* use func->cur_blksize */
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/* for byte mode */
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#define MMC_QUIRK_NONSTD_SDIO (1<<2) /* non-standard SDIO card attached */
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/* (missing CIA registers) */
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#define MMC_QUIRK_NONSTD_FUNC_IF (1<<4) /* SDIO card has nonstd function interfaces */
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#define MMC_QUIRK_DISABLE_CD (1<<5) /* disconnect CD/DAT[3] resistor */
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#define MMC_QUIRK_INAND_CMD38 (1<<6) /* iNAND devices have broken CMD38 */
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#define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */
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#define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */
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/* byte mode */
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#define MMC_QUIRK_LONG_READ_TIME (1<<9) /* Data read time > CSD says */
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#define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10) /* Skip secure for erase/trim */
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#define MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx could create a fake interrupt */
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#define MMC_QUIRK_TRIM_BROKEN (1<<12) /* Skip trim */
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#define MMC_QUIRK_BROKEN_HPI (1<<13) /* Disable broken HPI support */
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#define MMC_QUIRK_ERASE_BROKEN (1<<31) /* Skip erase */
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bool reenable_cmdq; /* Re-enable Command Queue */
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unsigned int erase_size; /* erase size in sectors */
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unsigned int erase_shift; /* if erase unit is power 2 */
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unsigned int pref_erase; /* in sectors */
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unsigned int eg_boundary; /* don't cross erase-group boundaries */
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unsigned int erase_arg; /* erase / trim / discard */
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u8 erased_byte; /* value of erased bytes */
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u32 raw_cid[4]; /* raw card CID */
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u32 raw_csd[4]; /* raw card CSD */
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u32 raw_scr[2]; /* raw card SCR */
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u32 raw_ssr[16]; /* raw card SSR */
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struct mmc_cid cid; /* card identification */
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struct mmc_csd csd; /* card specific */
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struct mmc_ext_csd ext_csd; /* mmc v4 extended card specific */
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struct sd_scr scr; /* extra SD information */
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struct sd_ssr ssr; /* yet more SD information */
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struct sd_switch_caps sw_caps; /* switch (CMD6) caps */
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struct sd_ext_reg ext_power; /* SD extension reg for PM */
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struct sd_ext_reg ext_perf; /* SD extension reg for PERF */
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unsigned int sdio_funcs; /* number of SDIO functions */
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atomic_t sdio_funcs_probed; /* number of probed SDIO funcs */
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struct sdio_cccr cccr; /* common card info */
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struct sdio_cis cis; /* common tuple info */
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struct sdio_func *sdio_func[SDIO_MAX_FUNCS]; /* SDIO functions (devices) */
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struct sdio_func *sdio_single_irq; /* SDIO function when only one IRQ active */
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u8 major_rev; /* major revision number */
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u8 minor_rev; /* minor revision number */
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unsigned num_info; /* number of info strings */
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const char **info; /* info strings */
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struct sdio_func_tuple *tuples; /* unknown common tuples */
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unsigned int sd_bus_speed; /* Bus Speed Mode set for the card */
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unsigned int mmc_avail_type; /* supported device type by both host and card */
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unsigned int drive_strength; /* for UHS-I, HS200 or HS400 */
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struct dentry *debugfs_root;
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struct mmc_part part[MMC_NUM_PHY_PARTITION]; /* physical partitions */
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unsigned int nr_parts;
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struct workqueue_struct *complete_wq; /* Private workqueue */
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};
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static inline bool mmc_large_sector(struct mmc_card *card)
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{
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return card->ext_csd.data_sector_size == 4096;
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}
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bool mmc_card_is_blockaddr(struct mmc_card *card);
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#define mmc_card_mmc(c) ((c)->type == MMC_TYPE_MMC)
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#define mmc_card_sd(c) ((c)->type == MMC_TYPE_SD)
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#define mmc_card_sdio(c) ((c)->type == MMC_TYPE_SDIO)
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#endif /* LINUX_MMC_CARD_H */
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