Merge branches 'fixes' and 'mmci' into for-linus
Russell King
commit
573f8c8d13
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@ -20,6 +20,7 @@
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#include <linux/err.h>
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#include <linux/highmem.h>
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#include <linux/log2.h>
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#include <linux/mmc/pm.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/card.h>
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#include <linux/amba/bus.h>
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@ -59,6 +60,7 @@ static unsigned int fmax = 515633;
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* @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
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* @pwrreg_powerup: power up value for MMCIPOWER register
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* @signal_direction: input/out direction of bus signals can be indicated
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* @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock
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*/
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struct variant_data {
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unsigned int clkreg;
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@ -71,6 +73,7 @@ struct variant_data {
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bool blksz_datactrl16;
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u32 pwrreg_powerup;
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bool signal_direction;
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bool pwrreg_clkgate;
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};
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static struct variant_data variant_arm = {
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@ -87,6 +90,14 @@ static struct variant_data variant_arm_extended_fifo = {
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.pwrreg_powerup = MCI_PWR_UP,
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};
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static struct variant_data variant_arm_extended_fifo_hwfc = {
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.fifosize = 128 * 4,
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.fifohalfsize = 64 * 4,
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.clkreg_enable = MCI_ARM_HWFCEN,
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.datalength_bits = 16,
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.pwrreg_powerup = MCI_PWR_UP,
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};
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static struct variant_data variant_u300 = {
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.fifosize = 16 * 4,
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.fifohalfsize = 8 * 4,
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@ -95,6 +106,7 @@ static struct variant_data variant_u300 = {
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.sdio = true,
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.pwrreg_powerup = MCI_PWR_ON,
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.signal_direction = true,
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.pwrreg_clkgate = true,
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};
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static struct variant_data variant_nomadik = {
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@ -106,6 +118,7 @@ static struct variant_data variant_nomadik = {
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.st_clkdiv = true,
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.pwrreg_powerup = MCI_PWR_ON,
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.signal_direction = true,
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.pwrreg_clkgate = true,
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};
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static struct variant_data variant_ux500 = {
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@ -118,6 +131,7 @@ static struct variant_data variant_ux500 = {
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.st_clkdiv = true,
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.pwrreg_powerup = MCI_PWR_ON,
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.signal_direction = true,
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.pwrreg_clkgate = true,
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};
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static struct variant_data variant_ux500v2 = {
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@ -131,8 +145,27 @@ static struct variant_data variant_ux500v2 = {
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.blksz_datactrl16 = true,
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.pwrreg_powerup = MCI_PWR_ON,
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.signal_direction = true,
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.pwrreg_clkgate = true,
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};
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/*
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* Validate mmc prerequisites
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*/
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static int mmci_validate_data(struct mmci_host *host,
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struct mmc_data *data)
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{
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if (!data)
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return 0;
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if (!is_power_of_2(data->blksz)) {
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dev_err(mmc_dev(host->mmc),
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"unsupported block size (%d bytes)\n", data->blksz);
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return -EINVAL;
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}
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return 0;
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}
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/*
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* This must be called with host->lock held
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*/
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@ -202,6 +235,9 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
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if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
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clk |= MCI_ST_8BIT_BUS;
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if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
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clk |= MCI_ST_UX500_NEG_EDGE;
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mmci_write_clkreg(host, clk);
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}
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@ -352,10 +388,33 @@ static inline void mmci_dma_release(struct mmci_host *host)
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host->dma_rx_channel = host->dma_tx_channel = NULL;
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}
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static void mmci_dma_data_error(struct mmci_host *host)
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{
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dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n");
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dmaengine_terminate_all(host->dma_current);
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host->dma_current = NULL;
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host->dma_desc_current = NULL;
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host->data->host_cookie = 0;
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}
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static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
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{
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struct dma_chan *chan = host->dma_current;
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struct dma_chan *chan;
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enum dma_data_direction dir;
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if (data->flags & MMC_DATA_READ) {
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dir = DMA_FROM_DEVICE;
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chan = host->dma_rx_channel;
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} else {
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dir = DMA_TO_DEVICE;
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chan = host->dma_tx_channel;
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}
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dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, dir);
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}
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static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data)
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{
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u32 status;
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int i;
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@ -374,19 +433,13 @@ static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
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* contiguous buffers. On TX, we'll get a FIFO underrun error.
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*/
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if (status & MCI_RXDATAAVLBLMASK) {
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dmaengine_terminate_all(chan);
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mmci_dma_data_error(host);
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if (!data->error)
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data->error = -EIO;
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}
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if (data->flags & MMC_DATA_WRITE) {
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dir = DMA_TO_DEVICE;
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} else {
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dir = DMA_FROM_DEVICE;
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}
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if (!data->host_cookie)
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dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, dir);
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mmci_dma_unmap(host, data);
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/*
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* Use of DMA with scatter-gather is impossible.
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@ -396,16 +449,15 @@ static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
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dev_err(mmc_dev(host->mmc), "buggy DMA detected. Taking evasive action.\n");
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mmci_dma_release(host);
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}
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host->dma_current = NULL;
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host->dma_desc_current = NULL;
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}
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static void mmci_dma_data_error(struct mmci_host *host)
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{
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dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n");
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dmaengine_terminate_all(host->dma_current);
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}
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static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
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struct mmci_host_next *next)
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/* prepares DMA channel and DMA descriptor, returns non-zero on failure */
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static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
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struct dma_chan **dma_chan,
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struct dma_async_tx_descriptor **dma_desc)
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{
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struct variant_data *variant = host->variant;
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struct dma_slave_config conf = {
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@ -423,16 +475,6 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
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enum dma_data_direction buffer_dirn;
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int nr_sg;
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/* Check if next job is already prepared */
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if (data->host_cookie && !next &&
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host->dma_current && host->dma_desc_current)
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return 0;
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if (!next) {
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host->dma_current = NULL;
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host->dma_desc_current = NULL;
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}
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if (data->flags & MMC_DATA_READ) {
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conf.direction = DMA_DEV_TO_MEM;
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buffer_dirn = DMA_FROM_DEVICE;
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@ -462,29 +504,41 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
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if (!desc)
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goto unmap_exit;
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if (next) {
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next->dma_chan = chan;
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next->dma_desc = desc;
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} else {
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host->dma_current = chan;
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host->dma_desc_current = desc;
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}
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*dma_chan = chan;
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*dma_desc = desc;
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return 0;
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unmap_exit:
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if (!next)
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dmaengine_terminate_all(chan);
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dma_unmap_sg(device->dev, data->sg, data->sg_len, buffer_dirn);
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return -ENOMEM;
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}
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static inline int mmci_dma_prep_data(struct mmci_host *host,
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struct mmc_data *data)
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{
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/* Check if next job is already prepared. */
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if (host->dma_current && host->dma_desc_current)
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return 0;
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/* No job were prepared thus do it now. */
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return __mmci_dma_prep_data(host, data, &host->dma_current,
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&host->dma_desc_current);
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}
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static inline int mmci_dma_prep_next(struct mmci_host *host,
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struct mmc_data *data)
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{
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struct mmci_host_next *nd = &host->next_data;
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return __mmci_dma_prep_data(host, data, &nd->dma_chan, &nd->dma_desc);
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}
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static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl)
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{
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int ret;
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struct mmc_data *data = host->data;
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ret = mmci_dma_prep_data(host, host->data, NULL);
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ret = mmci_dma_prep_data(host, host->data);
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if (ret)
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return ret;
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@ -514,19 +568,11 @@ static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data)
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{
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struct mmci_host_next *next = &host->next_data;
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if (data->host_cookie && data->host_cookie != next->cookie) {
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pr_warning("[%s] invalid cookie: data->host_cookie %d"
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" host->next_data.cookie %d\n",
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__func__, data->host_cookie, host->next_data.cookie);
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data->host_cookie = 0;
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}
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if (!data->host_cookie)
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return;
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WARN_ON(data->host_cookie && data->host_cookie != next->cookie);
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WARN_ON(!data->host_cookie && (next->dma_desc || next->dma_chan));
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host->dma_desc_current = next->dma_desc;
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host->dma_current = next->dma_chan;
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next->dma_desc = NULL;
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next->dma_chan = NULL;
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}
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@ -541,19 +587,13 @@ static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq,
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if (!data)
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return;
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if (data->host_cookie) {
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data->host_cookie = 0;
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return;
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}
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BUG_ON(data->host_cookie);
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/* if config for dma */
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if (((data->flags & MMC_DATA_WRITE) && host->dma_tx_channel) ||
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((data->flags & MMC_DATA_READ) && host->dma_rx_channel)) {
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if (mmci_dma_prep_data(host, data, nd))
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data->host_cookie = 0;
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else
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data->host_cookie = ++nd->cookie < 0 ? 1 : nd->cookie;
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}
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if (mmci_validate_data(host, data))
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return;
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if (!mmci_dma_prep_next(host, data))
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data->host_cookie = ++nd->cookie < 0 ? 1 : nd->cookie;
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}
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static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
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@ -561,29 +601,23 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
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{
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struct mmci_host *host = mmc_priv(mmc);
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struct mmc_data *data = mrq->data;
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struct dma_chan *chan;
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enum dma_data_direction dir;
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if (!data)
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if (!data || !data->host_cookie)
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return;
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if (data->flags & MMC_DATA_READ) {
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dir = DMA_FROM_DEVICE;
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chan = host->dma_rx_channel;
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} else {
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dir = DMA_TO_DEVICE;
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chan = host->dma_tx_channel;
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}
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mmci_dma_unmap(host, data);
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if (err) {
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struct mmci_host_next *next = &host->next_data;
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struct dma_chan *chan;
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if (data->flags & MMC_DATA_READ)
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chan = host->dma_rx_channel;
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else
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chan = host->dma_tx_channel;
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dmaengine_terminate_all(chan);
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/* if config for dma */
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if (chan) {
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if (err)
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dmaengine_terminate_all(chan);
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if (data->host_cookie)
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dma_unmap_sg(mmc_dev(host->mmc), data->sg,
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data->sg_len, dir);
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mrq->data->host_cookie = 0;
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next->dma_desc = NULL;
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next->dma_chan = NULL;
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}
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}
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@ -604,6 +638,11 @@ static inline void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
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{
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}
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static inline void mmci_dma_finalize(struct mmci_host *host,
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struct mmc_data *data)
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{
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}
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static inline void mmci_dma_data_error(struct mmci_host *host)
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{
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}
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@ -680,6 +719,9 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
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mmci_write_clkreg(host, clk);
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}
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if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
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datactrl |= MCI_ST_DPSM_DDRMODE;
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/*
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* Attempt to use DMA operation mode, if this
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* should fail, fall back to PIO mode
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@ -751,8 +793,10 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
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u32 remain, success;
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/* Terminate the DMA transfer */
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if (dma_inprogress(host))
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if (dma_inprogress(host)) {
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mmci_dma_data_error(host);
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mmci_dma_unmap(host, data);
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}
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/*
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* Calculate how far we are into the transfer. Note that
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@ -791,7 +835,7 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
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if (status & MCI_DATAEND || data->error) {
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if (dma_inprogress(host))
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mmci_dma_unmap(host, data);
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mmci_dma_finalize(host, data);
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mmci_stop_data(host);
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if (!data->error)
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@ -828,8 +872,10 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
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if (!cmd->data || cmd->error) {
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if (host->data) {
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/* Terminate the DMA transfer */
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if (dma_inprogress(host))
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if (dma_inprogress(host)) {
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mmci_dma_data_error(host);
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mmci_dma_unmap(host, host->data);
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}
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mmci_stop_data(host);
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}
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mmci_request_end(host, cmd->mrq);
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@ -1055,10 +1101,8 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
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WARN_ON(host->mrq != NULL);
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if (mrq->data && !is_power_of_2(mrq->data->blksz)) {
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dev_err(mmc_dev(mmc), "unsupported block size (%d bytes)\n",
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mrq->data->blksz);
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mrq->cmd->error = -EINVAL;
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mrq->cmd->error = mmci_validate_data(host, mrq->data);
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if (mrq->cmd->error) {
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mmc_request_done(mmc, mrq);
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return;
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}
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@ -1086,7 +1130,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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struct variant_data *variant = host->variant;
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u32 pwr = 0;
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unsigned long flags;
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int ret;
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|
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pm_runtime_get_sync(mmc_dev(mmc));
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@ -1096,23 +1139,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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|
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switch (ios->power_mode) {
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case MMC_POWER_OFF:
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if (host->vcc)
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ret = mmc_regulator_set_ocr(mmc, host->vcc, 0);
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if (!IS_ERR(mmc->supply.vmmc))
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mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
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break;
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case MMC_POWER_UP:
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if (host->vcc) {
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ret = mmc_regulator_set_ocr(mmc, host->vcc, ios->vdd);
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if (ret) {
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dev_err(mmc_dev(mmc), "unable to set OCR\n");
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/*
|
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* The .set_ios() function in the mmc_host_ops
|
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* struct return void, and failing to set the
|
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* power should be rare so we print an error
|
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* and return here.
|
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*/
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goto out;
|
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}
|
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}
|
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if (!IS_ERR(mmc->supply.vmmc))
|
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mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
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|
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/*
|
||||
* The ST Micro variant doesn't have the PL180s MCI_PWR_UP
|
||||
* and instead uses MCI_PWR_ON so apply whatever value is
|
||||
|
|
@ -1154,6 +1187,13 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* If clock = 0 and the variant requires the MMCIPOWER to be used for
|
||||
* gating the clock, the MCI_PWR_ON bit is cleared.
|
||||
*/
|
||||
if (!ios->clock && variant->pwrreg_clkgate)
|
||||
pwr &= ~MCI_PWR_ON;
|
||||
|
||||
spin_lock_irqsave(&host->lock, flags);
|
||||
|
||||
mmci_set_clkreg(host, ios->clock);
|
||||
|
|
@ -1161,7 +1201,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|||
|
||||
spin_unlock_irqrestore(&host->lock, flags);
|
||||
|
||||
out:
|
||||
pm_runtime_mark_last_busy(mmc_dev(mmc));
|
||||
pm_runtime_put_autosuspend(mmc_dev(mmc));
|
||||
}
|
||||
|
|
@ -1384,32 +1423,19 @@ static int mmci_probe(struct amba_device *dev,
|
|||
} else
|
||||
dev_warn(&dev->dev, "could not get default pinstate\n");
|
||||
|
||||
#ifdef CONFIG_REGULATOR
|
||||
/* If we're using the regulator framework, try to fetch a regulator */
|
||||
host->vcc = regulator_get(&dev->dev, "vmmc");
|
||||
if (IS_ERR(host->vcc))
|
||||
host->vcc = NULL;
|
||||
else {
|
||||
int mask = mmc_regulator_get_ocrmask(host->vcc);
|
||||
|
||||
if (mask < 0)
|
||||
dev_err(&dev->dev, "error getting OCR mask (%d)\n",
|
||||
mask);
|
||||
else {
|
||||
host->mmc->ocr_avail = (u32) mask;
|
||||
if (plat->ocr_mask)
|
||||
dev_warn(&dev->dev,
|
||||
"Provided ocr_mask/setpower will not be used "
|
||||
"(using regulator instead)\n");
|
||||
}
|
||||
}
|
||||
#endif
|
||||
/* Fall back to platform data if no regulator is found */
|
||||
if (host->vcc == NULL)
|
||||
/* Get regulators and the supported OCR mask */
|
||||
mmc_regulator_get_supply(mmc);
|
||||
if (!mmc->ocr_avail)
|
||||
mmc->ocr_avail = plat->ocr_mask;
|
||||
else if (plat->ocr_mask)
|
||||
dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
|
||||
|
||||
mmc->caps = plat->capabilities;
|
||||
mmc->caps2 = plat->capabilities2;
|
||||
|
||||
/* We support these PM capabilities. */
|
||||
mmc->pm_caps = MMC_PM_KEEP_POWER;
|
||||
|
||||
/*
|
||||
* We can do SGIO
|
||||
*/
|
||||
|
|
@ -1585,10 +1611,6 @@ static int mmci_remove(struct amba_device *dev)
|
|||
clk_disable_unprepare(host->clk);
|
||||
clk_put(host->clk);
|
||||
|
||||
if (host->vcc)
|
||||
mmc_regulator_set_ocr(mmc, host->vcc, 0);
|
||||
regulator_put(host->vcc);
|
||||
|
||||
mmc_free_host(mmc);
|
||||
|
||||
amba_release_regions(dev);
|
||||
|
|
@ -1636,8 +1658,37 @@ static int mmci_resume(struct device *dev)
|
|||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_PM_RUNTIME
|
||||
static int mmci_runtime_suspend(struct device *dev)
|
||||
{
|
||||
struct amba_device *adev = to_amba_device(dev);
|
||||
struct mmc_host *mmc = amba_get_drvdata(adev);
|
||||
|
||||
if (mmc) {
|
||||
struct mmci_host *host = mmc_priv(mmc);
|
||||
clk_disable_unprepare(host->clk);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mmci_runtime_resume(struct device *dev)
|
||||
{
|
||||
struct amba_device *adev = to_amba_device(dev);
|
||||
struct mmc_host *mmc = amba_get_drvdata(adev);
|
||||
|
||||
if (mmc) {
|
||||
struct mmci_host *host = mmc_priv(mmc);
|
||||
clk_prepare_enable(host->clk);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static const struct dev_pm_ops mmci_dev_pm_ops = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume)
|
||||
SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL)
|
||||
};
|
||||
|
||||
static struct amba_id mmci_ids[] = {
|
||||
|
|
@ -1651,6 +1702,11 @@ static struct amba_id mmci_ids[] = {
|
|||
.mask = 0xff0fffff,
|
||||
.data = &variant_arm_extended_fifo,
|
||||
},
|
||||
{
|
||||
.id = 0x02041180,
|
||||
.mask = 0xff0fffff,
|
||||
.data = &variant_arm_extended_fifo_hwfc,
|
||||
},
|
||||
{
|
||||
.id = 0x00041181,
|
||||
.mask = 0x000fffff,
|
||||
|
|
|
|||
|
|
@ -28,6 +28,8 @@
|
|||
#define MCI_ST_UX500_NEG_EDGE (1 << 13)
|
||||
#define MCI_ST_UX500_HWFCEN (1 << 14)
|
||||
#define MCI_ST_UX500_CLK_INV (1 << 15)
|
||||
/* Modified PL180 on Versatile Express platform */
|
||||
#define MCI_ARM_HWFCEN (1 << 12)
|
||||
|
||||
#define MMCIARGUMENT 0x008
|
||||
#define MMCICOMMAND 0x00c
|
||||
|
|
@ -193,7 +195,6 @@ struct mmci_host {
|
|||
/* pio stuff */
|
||||
struct sg_mapping_iter sg_miter;
|
||||
unsigned int size;
|
||||
struct regulator *vcc;
|
||||
|
||||
/* pinctrl handles */
|
||||
struct pinctrl *pinctrl;
|
||||
|
|
|
|||
Loading…
Reference in New Issue