4.19-stable review patch. If anyone has any objections, please let me know.
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From: Takeshi Saito takeshi.saito.xv@renesas.com
commit 5603731a15ef9ca317c122cc8c959f1dee1798b4 upstream.
In R-Car Gen2 or later, the maximum number of transfer blocks are changed from 0xFFFF to 0xFFFFFFFF. Therefore, Block Count Register should use iowrite32().
If another system (U-boot, Hypervisor OS, etc) uses bit[31:16], this value will not be cleared. So, SD/MMC card initialization fails.
So, check for the bigger register and use apropriate write. Also, mark the register as extended on Gen2.
Signed-off-by: Takeshi Saito takeshi.saito.xv@renesas.com [wsa: use max_blk_count in if(), add Gen2, update commit message] Signed-off-by: Wolfram Sang wsa+renesas@sang-engineering.com Cc: stable@kernel.org Reviewed-by: Simon Horman horms+renesas@verge.net.au [Ulf: Fixed build error] Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mmc/host/renesas_sdhi_sys_dmac.c | 1 + drivers/mmc/host/tmio_mmc.h | 5 +++++ drivers/mmc/host/tmio_mmc_core.c | 6 +++++- 3 files changed, 11 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c @@ -68,6 +68,7 @@ static const struct renesas_sdhi_of_data .scc_offset = 0x0300, .taps = rcar_gen2_scc_taps, .taps_num = ARRAY_SIZE(rcar_gen2_scc_taps), + .max_blk_count = 0xffffffff, };
/* Definitions for sampling clocks */ --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -279,6 +279,11 @@ static inline void sd_ctrl_write32_as_16 iowrite16(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); }
+static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) +{ + iowrite32(val, host->ctl + (addr << host->bus_shift)); +} + static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr, const u32 *buf, int count) { --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -46,6 +46,7 @@ #include <linux/regulator/consumer.h> #include <linux/mmc/sdio.h> #include <linux/scatterlist.h> +#include <linux/sizes.h> #include <linux/spinlock.h> #include <linux/swiotlb.h> #include <linux/workqueue.h> @@ -777,7 +778,10 @@ static int tmio_mmc_start_data(struct tm
/* Set transfer length / blocksize */ sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); - sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); + if (host->mmc->max_blk_count >= SZ_64K) + sd_ctrl_write32(host, CTL_XFER_BLK_COUNT, data->blocks); + else + sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
tmio_mmc_start_dma(host, data);