diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-pxa2xx-dma.c | 170 | ||||
| -rw-r--r-- | drivers/spi/spi-pxa2xx-pci.c | 128 | ||||
| -rw-r--r-- | drivers/spi/spi-pxa2xx.c | 46 | ||||
| -rw-r--r-- | drivers/spi/spi-pxa2xx.h | 9 | ||||
| -rw-r--r-- | drivers/spi/spi-rockchip.c | 3 | ||||
| -rw-r--r-- | drivers/spi/spi-s3c64xx.c | 206 | ||||
| -rw-r--r-- | drivers/spi/spi-sh-msiof.c | 18 | ||||
| -rw-r--r-- | drivers/spi/spi-sh.c | 16 |
8 files changed, 282 insertions, 314 deletions
diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c index a18a03d..db3ae1d 100644 --- a/drivers/spi/spi-pxa2xx-dma.c +++ b/drivers/spi/spi-pxa2xx-dma.c @@ -20,79 +20,6 @@ #include "spi-pxa2xx.h" -static int pxa2xx_spi_map_dma_buffer(struct driver_data *drv_data, - enum dma_data_direction dir) -{ - int i, nents, len = drv_data->len; - struct scatterlist *sg; - struct device *dmadev; - struct sg_table *sgt; - void *buf, *pbuf; - - if (dir == DMA_TO_DEVICE) { - dmadev = drv_data->tx_chan->device->dev; - sgt = &drv_data->tx_sgt; - buf = drv_data->tx; - } else { - dmadev = drv_data->rx_chan->device->dev; - sgt = &drv_data->rx_sgt; - buf = drv_data->rx; - } - - nents = DIV_ROUND_UP(len, SZ_2K); - if (nents != sgt->nents) { - int ret; - - sg_free_table(sgt); - ret = sg_alloc_table(sgt, nents, GFP_ATOMIC); - if (ret) - return ret; - } - - pbuf = buf; - for_each_sg(sgt->sgl, sg, sgt->nents, i) { - size_t bytes = min_t(size_t, len, SZ_2K); - - sg_set_buf(sg, pbuf, bytes); - pbuf += bytes; - len -= bytes; - } - - nents = dma_map_sg(dmadev, sgt->sgl, sgt->nents, dir); - if (!nents) - return -ENOMEM; - - return nents; -} - -static void pxa2xx_spi_unmap_dma_buffer(struct driver_data *drv_data, - enum dma_data_direction dir) -{ - struct device *dmadev; - struct sg_table *sgt; - - if (dir == DMA_TO_DEVICE) { - dmadev = drv_data->tx_chan->device->dev; - sgt = &drv_data->tx_sgt; - } else { - dmadev = drv_data->rx_chan->device->dev; - sgt = &drv_data->rx_sgt; - } - - dma_unmap_sg(dmadev, sgt->sgl, sgt->nents, dir); -} - -static void pxa2xx_spi_unmap_dma_buffers(struct driver_data *drv_data) -{ - if (!drv_data->dma_mapped) - return; - - pxa2xx_spi_unmap_dma_buffer(drv_data, DMA_FROM_DEVICE); - pxa2xx_spi_unmap_dma_buffer(drv_data, DMA_TO_DEVICE); - - drv_data->dma_mapped = 0; -} - static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data, bool error) { @@ -125,8 +52,6 @@ static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data, pxa2xx_spi_write(drv_data, SSTO, 0); if (!error) { - pxa2xx_spi_unmap_dma_buffers(drv_data); - msg->actual_length += drv_data->len; msg->state = pxa2xx_spi_next_transfer(drv_data); } else { @@ -152,11 +77,12 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data, enum dma_transfer_direction dir) { struct chip_data *chip = drv_data->cur_chip; + struct spi_transfer *xfer = drv_data->cur_transfer; enum dma_slave_buswidth width; struct dma_slave_config cfg; struct dma_chan *chan; struct sg_table *sgt; - int nents, ret; + int ret; switch (drv_data->n_bytes) { case 1: @@ -178,17 +104,15 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data, cfg.dst_addr_width = width; cfg.dst_maxburst = chip->dma_burst_size; - sgt = &drv_data->tx_sgt; - nents = drv_data->tx_nents; - chan = drv_data->tx_chan; + sgt = &xfer->tx_sg; + chan = drv_data->master->dma_tx; } else { cfg.src_addr = drv_data->ssdr_physical; cfg.src_addr_width = width; cfg.src_maxburst = chip->dma_burst_size; - sgt = &drv_data->rx_sgt; - nents = drv_data->rx_nents; - chan = drv_data->rx_chan; + sgt = &xfer->rx_sg; + chan = drv_data->master->dma_rx; } ret = dmaengine_slave_config(chan, &cfg); @@ -197,46 +121,10 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data, return NULL; } - return dmaengine_prep_slave_sg(chan, sgt->sgl, nents, dir, + return dmaengine_prep_slave_sg(chan, sgt->sgl, sgt->nents, dir, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); } -bool pxa2xx_spi_dma_is_possible(size_t len) -{ - return len <= MAX_DMA_LEN; -} - -int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data) -{ - const struct chip_data *chip = drv_data->cur_chip; - int ret; - - if (!chip->enable_dma) - return 0; - - /* Don't bother with DMA if we can't do even a single burst */ - if (drv_data->len < chip->dma_burst_size) - return 0; - - ret = pxa2xx_spi_map_dma_buffer(drv_data, DMA_TO_DEVICE); - if (ret <= 0) { - dev_warn(&drv_data->pdev->dev, "failed to DMA map TX\n"); - return 0; - } - - drv_data->tx_nents = ret; - - ret = pxa2xx_spi_map_dma_buffer(drv_data, DMA_FROM_DEVICE); - if (ret <= 0) { - pxa2xx_spi_unmap_dma_buffer(drv_data, DMA_TO_DEVICE); - dev_warn(&drv_data->pdev->dev, "failed to DMA map RX\n"); - return 0; - } - - drv_data->rx_nents = ret; - return 1; -} - irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data) { u32 status; @@ -245,8 +133,8 @@ irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data) if (status & SSSR_ROR) { dev_err(&drv_data->pdev->dev, "FIFO overrun\n"); - dmaengine_terminate_async(drv_data->rx_chan); - dmaengine_terminate_async(drv_data->tx_chan); + dmaengine_terminate_async(drv_data->master->dma_rx); + dmaengine_terminate_async(drv_data->master->dma_tx); pxa2xx_spi_dma_transfer_complete(drv_data, true); return IRQ_HANDLED; @@ -285,16 +173,15 @@ int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst) return 0; err_rx: - dmaengine_terminate_async(drv_data->tx_chan); + dmaengine_terminate_async(drv_data->master->dma_tx); err_tx: - pxa2xx_spi_unmap_dma_buffers(drv_data); return err; } void pxa2xx_spi_dma_start(struct driver_data *drv_data) { - dma_async_issue_pending(drv_data->rx_chan); - dma_async_issue_pending(drv_data->tx_chan); + dma_async_issue_pending(drv_data->master->dma_rx); + dma_async_issue_pending(drv_data->master->dma_tx); atomic_set(&drv_data->dma_running, 1); } @@ -303,21 +190,22 @@ int pxa2xx_spi_dma_setup(struct driver_data *drv_data) { struct pxa2xx_spi_master *pdata = drv_data->master_info; struct device *dev = &drv_data->pdev->dev; + struct spi_master *master = drv_data->master; dma_cap_mask_t mask; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - drv_data->tx_chan = dma_request_slave_channel_compat(mask, + master->dma_tx = dma_request_slave_channel_compat(mask, pdata->dma_filter, pdata->tx_param, dev, "tx"); - if (!drv_data->tx_chan) + if (!master->dma_tx) return -ENODEV; - drv_data->rx_chan = dma_request_slave_channel_compat(mask, + master->dma_rx = dma_request_slave_channel_compat(mask, pdata->dma_filter, pdata->rx_param, dev, "rx"); - if (!drv_data->rx_chan) { - dma_release_channel(drv_data->tx_chan); - drv_data->tx_chan = NULL; + if (!master->dma_rx) { + dma_release_channel(master->dma_tx); + master->dma_tx = NULL; return -ENODEV; } @@ -326,17 +214,17 @@ int pxa2xx_spi_dma_setup(struct driver_data *drv_data) void pxa2xx_spi_dma_release(struct driver_data *drv_data) { - if (drv_data->rx_chan) { - dmaengine_terminate_sync(drv_data->rx_chan); - dma_release_channel(drv_data->rx_chan); - sg_free_table(&drv_data->rx_sgt); - drv_data->rx_chan = NULL; + struct spi_master *master = drv_data->master; + + if (master->dma_rx) { + dmaengine_terminate_sync(master->dma_rx); + dma_release_channel(master->dma_rx); + master->dma_rx = NULL; } - if (drv_data->tx_chan) { - dmaengine_terminate_sync(drv_data->tx_chan); - dma_release_channel(drv_data->tx_chan); - sg_free_table(&drv_data->tx_sgt); - drv_data->tx_chan = NULL; + if (master->dma_tx) { + dmaengine_terminate_sync(master->dma_tx); + dma_release_channel(master->dma_tx); + master->dma_tx = NULL; } } diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c index 5202de9..f3df522 100644 --- a/drivers/spi/spi-pxa2xx-pci.c +++ b/drivers/spi/spi-pxa2xx-pci.c @@ -1,24 +1,26 @@ /* * CE4100's SPI device is more or less the same one as found on PXA * + * Copyright (C) 2016, Intel Corporation */ +#include <linux/clk-provider.h> +#include <linux/module.h> +#include <linux/of_device.h> #include <linux/pci.h> #include <linux/platform_device.h> -#include <linux/of_device.h> -#include <linux/module.h> #include <linux/spi/pxa2xx_spi.h> -#include <linux/clk-provider.h> #include <linux/dmaengine.h> #include <linux/platform_data/dma-dw.h> enum { - PORT_CE4100, + PORT_QUARK_X1000, PORT_BYT, + PORT_MRFLD, PORT_BSW0, PORT_BSW1, PORT_BSW2, - PORT_QUARK_X1000, + PORT_CE4100, PORT_LPT, }; @@ -29,8 +31,11 @@ struct pxa_spi_info { unsigned long max_clk_rate; /* DMA channel request parameters */ + bool (*dma_filter)(struct dma_chan *chan, void *param); void *tx_param; void *rx_param; + + int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c); }; static struct dw_dma_slave byt_tx_param = { .dst_id = 0 }; @@ -57,6 +62,56 @@ static bool lpss_dma_filter(struct dma_chan *chan, void *param) return true; } +static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c) +{ + struct pci_dev *dma_dev; + + c->num_chipselect = 1; + c->max_clk_rate = 50000000; + + dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0)); + + if (c->tx_param) { + struct dw_dma_slave *slave = c->tx_param; + + slave->dma_dev = &dma_dev->dev; + slave->m_master = 0; + slave->p_master = 1; + } + + if (c->rx_param) { + struct dw_dma_slave *slave = c->rx_param; + + slave->dma_dev = &dma_dev->dev; + slave->m_master = 0; + slave->p_master = 1; + } + + c->dma_filter = lpss_dma_filter; + return 0; +} + +static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c) +{ + switch (PCI_FUNC(dev->devfn)) { + case 0: + c->port_id = 3; + c->num_chipselect = 1; + break; + case 1: + c->port_id = 5; + c->num_chipselect = 4; + break; + case 2: + c->port_id = 6; + c->num_chipselect = 1; + break; + default: + return -ENODEV; + } + return 0; +} + static struct pxa_spi_info spi_info_configs[] = { [PORT_CE4100] = { .type = PXA25x_SSP, @@ -67,35 +122,36 @@ static struct pxa_spi_info spi_info_configs[] = { [PORT_BYT] = { .type = LPSS_BYT_SSP, .port_id = 0, - .num_chipselect = 1, - .max_clk_rate = 50000000, + .setup = lpss_spi_setup, .tx_param = &byt_tx_param, .rx_param = &byt_rx_param, }, [PORT_BSW0] = { - .type = LPSS_BYT_SSP, + .type = LPSS_BSW_SSP, .port_id = 0, - .num_chipselect = 1, - .max_clk_rate = 50000000, + .setup = lpss_spi_setup, .tx_param = &bsw0_tx_param, .rx_param = &bsw0_rx_param, }, [PORT_BSW1] = { - .type = LPSS_BYT_SSP, + .type = LPSS_BSW_SSP, .port_id = 1, - .num_chipselect = 1, - .max_clk_rate = 50000000, + .setup = lpss_spi_setup, .tx_param = &bsw1_tx_param, .rx_param = &bsw1_rx_param, }, [PORT_BSW2] = { - .type = LPSS_BYT_SSP, + .type = LPSS_BSW_SSP, .port_id = 2, - .num_chipselect = 1, - .max_clk_rate = 50000000, + .setup = lpss_spi_setup, .tx_param = &bsw2_tx_param, .rx_param = &bsw2_rx_param, }, + [PORT_MRFLD] = { + .type = PXA27x_SSP, + .max_clk_rate = 25000000, + .setup = mrfld_spi_setup, + }, [PORT_QUARK_X1000] = { .type = QUARK_X1000_SSP, .port_id = -1, @@ -105,8 +161,7 @@ static struct pxa_spi_info spi_info_configs[] = { [PORT_LPT] = { .type = LPSS_LPT_SSP, .port_id = 0, - .num_chipselect = 1, - .max_clk_rate = 50000000, + .setup = lpss_spi_setup, .tx_param = &lpt_tx_param, .rx_param = &lpt_rx_param, }, @@ -122,7 +177,6 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev, struct ssp_device *ssp; struct pxa_spi_info *c; char buf[40]; - struct pci_dev *dma_dev; ret = pcim_enable_device(dev); if (ret) @@ -133,30 +187,15 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev, return ret; c = &spi_info_configs[ent->driver_data]; - - memset(&spi_pdata, 0, sizeof(spi_pdata)); - spi_pdata.num_chipselect = (c->num_chipselect > 0) ? - c->num_chipselect : dev->devfn; - - dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0)); - - if (c->tx_param) { - struct dw_dma_slave *slave = c->tx_param; - - slave->dma_dev = &dma_dev->dev; - slave->m_master = 0; - slave->p_master = 1; + if (c->setup) { + ret = c->setup(dev, c); + if (ret) + return ret; } - if (c->rx_param) { - struct dw_dma_slave *slave = c->rx_param; - - slave->dma_dev = &dma_dev->dev; - slave->m_master = 0; - slave->p_master = 1; - } - - spi_pdata.dma_filter = lpss_dma_filter; + memset(&spi_pdata, 0, sizeof(spi_pdata)); + spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn; + spi_pdata.dma_filter = c->dma_filter; spi_pdata.tx_param = c->tx_param; spi_pdata.rx_param = c->rx_param; spi_pdata.enable_dma = c->rx_param && c->tx_param; @@ -164,10 +203,6 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev, ssp = &spi_pdata.ssp; ssp->phys_base = pci_resource_start(dev, 0); ssp->mmio_base = pcim_iomap_table(dev)[0]; - if (!ssp->mmio_base) { - dev_err(&dev->dev, "failed to ioremap() registers\n"); - return -EIO; - } ssp->irq = dev->irq; ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn; ssp->type = c->type; @@ -208,12 +243,13 @@ static void pxa2xx_spi_pci_remove(struct pci_dev *dev) } static const struct pci_device_id pxa2xx_spi_pci_devices[] = { - { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 }, { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 }, { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT }, + { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD }, { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 }, { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 }, { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 }, + { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 }, { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT }, { }, }; diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index daf2844..87150a1 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -919,9 +919,21 @@ static unsigned int pxa2xx_ssp_get_clk_div(struct driver_data *drv_data, return clk_div << 8; } +static bool pxa2xx_spi_can_dma(struct spi_master *master, + struct spi_device *spi, + struct spi_transfer *xfer) +{ + struct chip_data *chip = spi_get_ctldata(spi); + + return chip->enable_dma && + xfer->len <= MAX_DMA_LEN && + xfer->len >= chip->dma_burst_size; +} + static void pump_transfers(unsigned long data) { struct driver_data *drv_data = (struct driver_data *)data; + struct spi_master *master = drv_data->master; struct spi_message *message = NULL; struct spi_transfer *transfer = NULL; struct spi_transfer *previous = NULL; @@ -935,6 +947,7 @@ static void pump_transfers(unsigned long data) u32 dma_burst = drv_data->cur_chip->dma_burst_size; u32 change_mask = pxa2xx_spi_get_ssrc1_change_mask(drv_data); int err; + int dma_mapped; /* Get current state information */ message = drv_data->cur_msg; @@ -969,7 +982,7 @@ static void pump_transfers(unsigned long data) } /* Check if we can DMA this transfer */ - if (!pxa2xx_spi_dma_is_possible(transfer->len) && chip->enable_dma) { + if (transfer->len > MAX_DMA_LEN && chip->enable_dma) { /* reject already-mapped transfers; PIO won't always work */ if (message->is_dma_mapped @@ -1046,10 +1059,10 @@ static void pump_transfers(unsigned long data) message->state = RUNNING_STATE; - drv_data->dma_mapped = 0; - if (pxa2xx_spi_dma_is_possible(drv_data->len)) - drv_data->dma_mapped = pxa2xx_spi_map_dma_buffers(drv_data); - if (drv_data->dma_mapped) { + dma_mapped = master->can_dma && + master->can_dma(master, message->spi, transfer) && + master->cur_msg_mapped; + if (dma_mapped) { /* Ensure we have the correct interrupt handler */ drv_data->transfer_handler = pxa2xx_spi_dma_transfer; @@ -1079,14 +1092,14 @@ static void pump_transfers(unsigned long data) cr0 = pxa2xx_configure_sscr0(drv_data, clk_div, bits); if (!pxa25x_ssp_comp(drv_data)) dev_dbg(&message->spi->dev, "%u Hz actual, %s\n", - drv_data->master->max_speed_hz + master->max_speed_hz / (1 + ((cr0 & SSCR0_SCR(0xfff)) >> 8)), - drv_data->dma_mapped ? "DMA" : "PIO"); + dma_mapped ? "DMA" : "PIO"); else dev_dbg(&message->spi->dev, "%u Hz actual, %s\n", - drv_data->master->max_speed_hz / 2 + master->max_speed_hz / 2 / (1 + ((cr0 & SSCR0_SCR(0x0ff)) >> 8)), - drv_data->dma_mapped ? "DMA" : "PIO"); + dma_mapped ? "DMA" : "PIO"); if (is_lpss_ssp(drv_data)) { if ((pxa2xx_spi_read(drv_data, SSIRF) & 0xff) @@ -1247,7 +1260,7 @@ static int setup(struct spi_device *spi) chip->frm = spi->chip_select; } else chip->gpio_cs = -1; - chip->enable_dma = 0; + chip->enable_dma = drv_data->master_info->enable_dma; chip->timeout = TIMOUT_DFLT; } @@ -1266,17 +1279,9 @@ static int setup(struct spi_device *spi) tx_hi_thres = chip_info->tx_hi_threshold; if (chip_info->rx_threshold) rx_thres = chip_info->rx_threshold; - chip->enable_dma = drv_data->master_info->enable_dma; chip->dma_threshold = 0; if (chip_info->enable_loopback) chip->cr1 = SSCR1_LBM; - } else if (ACPI_HANDLE(&spi->dev)) { - /* - * Slave devices enumerated from ACPI namespace don't - * usually have chip_info but we still might want to use - * DMA with them. - */ - chip->enable_dma = drv_data->master_info->enable_dma; } chip->lpss_rx_threshold = SSIRF_RxThresh(rx_thres); @@ -1396,6 +1401,9 @@ static const struct pci_device_id pxa2xx_spi_pci_compound_match[] = { /* SPT-H */ { PCI_VDEVICE(INTEL, 0xa129), LPSS_SPT_SSP }, { PCI_VDEVICE(INTEL, 0xa12a), LPSS_SPT_SSP }, + /* KBL-H */ + { PCI_VDEVICE(INTEL, 0xa2a9), LPSS_SPT_SSP }, + { PCI_VDEVICE(INTEL, 0xa2aa), LPSS_SPT_SSP }, /* BXT A-Step */ { PCI_VDEVICE(INTEL, 0x0ac2), LPSS_BXT_SSP }, { PCI_VDEVICE(INTEL, 0x0ac4), LPSS_BXT_SSP }, @@ -1608,6 +1616,8 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) if (status) { dev_dbg(dev, "no DMA channels available, using PIO\n"); platform_info->enable_dma = false; + } else { + master->can_dma = pxa2xx_spi_can_dma; } } diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index e6b0900..d217ad5 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -50,12 +50,6 @@ struct driver_data { struct tasklet_struct pump_transfers; /* DMA engine support */ - struct dma_chan *rx_chan; - struct dma_chan *tx_chan; - struct sg_table rx_sgt; - struct sg_table tx_sgt; - int rx_nents; - int tx_nents; atomic_t dma_running; /* Current message transfer state info */ @@ -67,7 +61,6 @@ struct driver_data { void *tx_end; void *rx; void *rx_end; - int dma_mapped; u8 n_bytes; int (*write)(struct driver_data *drv_data); int (*read)(struct driver_data *drv_data); @@ -145,8 +138,6 @@ extern void *pxa2xx_spi_next_transfer(struct driver_data *drv_data); #define MAX_DMA_LEN SZ_64K #define DEFAULT_DMA_CR1 (SSCR1_TSRE | SSCR1_RSRE | SSCR1_TRAIL) -extern bool pxa2xx_spi_dma_is_possible(size_t len); -extern int pxa2xx_spi_map_dma_buffers(struct driver_data *drv_data); extern irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data); extern int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst); extern void pxa2xx_spi_dma_start(struct driver_data *drv_data); diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 7a58db4..0f89c21 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -911,9 +911,12 @@ static const struct dev_pm_ops rockchip_spi_pm = { }; static const struct of_device_id rockchip_spi_dt_match[] = { + { .compatible = "rockchip,rk3036-spi", }, { .compatible = "rockchip,rk3066-spi", }, { .compatible = "rockchip,rk3188-spi", }, + { .compatible = "rockchip,rk3228-spi", }, { .compatible = "rockchip,rk3288-spi", }, + { .compatible = "rockchip,rk3368-spi", }, { .compatible = "rockchip,rk3399-spi", }, { }, }; diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 5a76a50..3c09e94 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -156,12 +156,14 @@ struct s3c64xx_spi_port_config { int quirks; bool high_speed; bool clk_from_cmu; + bool clk_ioclk; }; /** * struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver. * @clk: Pointer to the spi clock. * @src_clk: Pointer to the clock used to generate SPI signals. + * @ioclk: Pointer to the i/o clock between master and slave * @master: Pointer to the SPI Protocol master. * @cntrlr_info: Platform specific data for the controller this driver manages. * @tgl_spi: Pointer to the last CS left untoggled by the cs_change hint. @@ -181,6 +183,7 @@ struct s3c64xx_spi_driver_data { void __iomem *regs; struct clk *clk; struct clk *src_clk; + struct clk *ioclk; struct platform_device *pdev; struct spi_master *master; struct s3c64xx_spi_info *cntrlr_info; @@ -310,44 +313,63 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, dma_async_issue_pending(dma->ch); } +static void s3c64xx_spi_set_cs(struct spi_device *spi, bool enable) +{ + struct s3c64xx_spi_driver_data *sdd = + spi_master_get_devdata(spi->master); + + if (sdd->cntrlr_info->no_cs) + return; + + if (enable) { + if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) { + writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + } else { + u32 ssel = readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL); + + ssel |= (S3C64XX_SPI_SLAVE_AUTO | + S3C64XX_SPI_SLAVE_NSC_CNT_2); + writel(ssel, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + } + } else { + if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) + writel(S3C64XX_SPI_SLAVE_SIG_INACT, + sdd->regs + S3C64XX_SPI_SLAVE_SEL); + } +} + static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) { struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi); dma_filter_fn filter = sdd->cntrlr_info->filter; struct device *dev = &sdd->pdev->dev; dma_cap_mask_t mask; - int ret; - if (!is_polling(sdd)) { - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - /* Acquire DMA channels */ - sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter, - sdd->cntrlr_info->dma_rx, dev, "rx"); - if (!sdd->rx_dma.ch) { - dev_err(dev, "Failed to get RX DMA channel\n"); - ret = -EBUSY; - goto out; - } - spi->dma_rx = sdd->rx_dma.ch; - - sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter, - sdd->cntrlr_info->dma_tx, dev, "tx"); - if (!sdd->tx_dma.ch) { - dev_err(dev, "Failed to get TX DMA channel\n"); - ret = -EBUSY; - goto out_rx; - } - spi->dma_tx = sdd->tx_dma.ch; + if (is_polling(sdd)) + return 0; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + /* Acquire DMA channels */ + sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter, + sdd->cntrlr_info->dma_rx, dev, "rx"); + if (!sdd->rx_dma.ch) { + dev_err(dev, "Failed to get RX DMA channel\n"); + return -EBUSY; } + spi->dma_rx = sdd->rx_dma.ch; - return 0; + sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter, + sdd->cntrlr_info->dma_tx, dev, "tx"); + if (!sdd->tx_dma.ch) { + dev_err(dev, "Failed to get TX DMA channel\n"); + dma_release_channel(sdd->rx_dma.ch); + return -EBUSY; + } + spi->dma_tx = sdd->tx_dma.ch; -out_rx: - dma_release_channel(sdd->rx_dma.ch); -out: - return ret; + return 0; } static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi) @@ -577,9 +599,7 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) u32 val; /* Disable Clock */ - if (sdd->port_conf->clk_from_cmu) { - clk_disable_unprepare(sdd->src_clk); - } else { + if (!sdd->port_conf->clk_from_cmu) { val = readl(regs + S3C64XX_SPI_CLK_CFG); val &= ~S3C64XX_SPI_ENCLK_ENABLE; writel(val, regs + S3C64XX_SPI_CLK_CFG); @@ -622,11 +642,8 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) writel(val, regs + S3C64XX_SPI_MODE_CFG); if (sdd->port_conf->clk_from_cmu) { - /* Configure Clock */ - /* There is half-multiplier before the SPI */ + /* The src_clk clock is divided internally by 2 */ clk_set_rate(sdd->src_clk, sdd->cur_speed * 2); - /* Enable Clock */ - clk_prepare_enable(sdd->src_clk); } else { /* Configure Clock */ val = readl(regs + S3C64XX_SPI_CLK_CFG); @@ -651,16 +668,6 @@ static int s3c64xx_spi_prepare_message(struct spi_master *master, struct spi_device *spi = msg->spi; struct s3c64xx_spi_csinfo *cs = spi->controller_data; - /* If Master's(controller) state differs from that needed by Slave */ - if (sdd->cur_speed != spi->max_speed_hz - || sdd->cur_mode != spi->mode - || sdd->cur_bpw != spi->bits_per_word) { - sdd->cur_bpw = spi->bits_per_word; - sdd->cur_speed = spi->max_speed_hz; - sdd->cur_mode = spi->mode; - s3c64xx_spi_config(sdd); - } - /* Configure feedback delay */ writel(cs->fb_delay & 0x3, sdd->regs + S3C64XX_SPI_FB_CLK); @@ -687,6 +694,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) { sdd->cur_bpw = bpw; sdd->cur_speed = speed; + sdd->cur_mode = spi->mode; s3c64xx_spi_config(sdd); } @@ -706,12 +714,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, enable_datapath(sdd, spi, xfer, use_dma); /* Start the signals */ - if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) - writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); - else - writel(readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL) - | S3C64XX_SPI_SLAVE_AUTO | S3C64XX_SPI_SLAVE_NSC_CNT_2, - sdd->regs + S3C64XX_SPI_SLAVE_SEL); + s3c64xx_spi_set_cs(spi, true); spin_unlock_irqrestore(&sdd->lock, flags); @@ -861,16 +864,15 @@ static int s3c64xx_spi_setup(struct spi_device *spi) pm_runtime_mark_last_busy(&sdd->pdev->dev); pm_runtime_put_autosuspend(&sdd->pdev->dev); - if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) - writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + s3c64xx_spi_set_cs(spi, false); + return 0; setup_exit: pm_runtime_mark_last_busy(&sdd->pdev->dev); pm_runtime_put_autosuspend(&sdd->pdev->dev); /* setup() returns with device de-selected */ - if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) - writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + s3c64xx_spi_set_cs(spi, false); if (gpio_is_valid(spi->cs_gpio)) gpio_free(spi->cs_gpio); @@ -944,7 +946,9 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel) sdd->cur_speed = 0; - if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) + if (sci->no_cs) + writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + else if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); /* Disable Interrupts - we use Polling if not DMA mode */ @@ -999,6 +1003,8 @@ static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev) sci->num_cs = temp; } + sci->no_cs = of_property_read_bool(dev->of_node, "broken-cs"); + return sci; } #else @@ -1076,7 +1082,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) if (ret < 0) { dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret); - goto err0; + goto err_deref_master; } sdd->port_id = ret; } else { @@ -1114,13 +1120,13 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) sdd->regs = devm_ioremap_resource(&pdev->dev, mem_res); if (IS_ERR(sdd->regs)) { ret = PTR_ERR(sdd->regs); - goto err0; + goto err_deref_master; } if (sci->cfg_gpio && sci->cfg_gpio()) { dev_err(&pdev->dev, "Unable to config gpio\n"); ret = -EBUSY; - goto err0; + goto err_deref_master; } /* Setup clocks */ @@ -1128,13 +1134,13 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) if (IS_ERR(sdd->clk)) { dev_err(&pdev->dev, "Unable to acquire clock 'spi'\n"); ret = PTR_ERR(sdd->clk); - goto err0; + goto err_deref_master; } - if (clk_prepare_enable(sdd->clk)) { + ret = clk_prepare_enable(sdd->clk); + if (ret) { dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n"); - ret = -EBUSY; - goto err0; + goto err_deref_master; } sprintf(clk_name, "spi_busclk%d", sci->src_clk_nr); @@ -1143,13 +1149,28 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Unable to acquire clock '%s'\n", clk_name); ret = PTR_ERR(sdd->src_clk); - goto err2; + goto err_disable_clk; } - if (clk_prepare_enable(sdd->src_clk)) { + ret = clk_prepare_enable(sdd->src_clk); + if (ret) { dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name); - ret = -EBUSY; - goto err2; + goto err_disable_clk; + } + + if (sdd->port_conf->clk_ioclk) { + sdd->ioclk = devm_clk_get(&pdev->dev, "spi_ioclk"); + if (IS_ERR(sdd->ioclk)) { + dev_err(&pdev->dev, "Unable to acquire 'ioclk'\n"); + ret = PTR_ERR(sdd->ioclk); + goto err_disable_src_clk; + } + + ret = clk_prepare_enable(sdd->ioclk); + if (ret) { + dev_err(&pdev->dev, "Couldn't enable clock 'ioclk'\n"); + goto err_disable_src_clk; + } } pm_runtime_set_autosuspend_delay(&pdev->dev, AUTOSUSPEND_TIMEOUT); @@ -1169,7 +1190,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) if (ret != 0) { dev_err(&pdev->dev, "Failed to request IRQ %d: %d\n", irq, ret); - goto err3; + goto err_pm_put; } writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN | @@ -1179,7 +1200,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) ret = devm_spi_register_master(&pdev->dev, master); if (ret != 0) { dev_err(&pdev->dev, "cannot register SPI master: %d\n", ret); - goto err3; + goto err_pm_put; } dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n", @@ -1193,15 +1214,17 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) return 0; -err3: +err_pm_put: pm_runtime_put_noidle(&pdev->dev); pm_runtime_disable(&pdev->dev); pm_runtime_set_suspended(&pdev->dev); + clk_disable_unprepare(sdd->ioclk); +err_disable_src_clk: clk_disable_unprepare(sdd->src_clk); -err2: +err_disable_clk: clk_disable_unprepare(sdd->clk); -err0: +err_deref_master: spi_master_put(master); return ret; @@ -1209,13 +1232,15 @@ err0: static int s3c64xx_spi_remove(struct platform_device *pdev) { - struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); + struct spi_master *master = platform_get_drvdata(pdev); struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); pm_runtime_get_sync(&pdev->dev); writel(0, sdd->regs + S3C64XX_SPI_INT_EN); + clk_disable_unprepare(sdd->ioclk); + clk_disable_unprepare(sdd->src_clk); clk_disable_unprepare(sdd->clk); @@ -1274,6 +1299,7 @@ static int s3c64xx_spi_runtime_suspend(struct device *dev) clk_disable_unprepare(sdd->clk); clk_disable_unprepare(sdd->src_clk); + clk_disable_unprepare(sdd->ioclk); return 0; } @@ -1284,17 +1310,28 @@ static int s3c64xx_spi_runtime_resume(struct device *dev) struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); int ret; + if (sdd->port_conf->clk_ioclk) { + ret = clk_prepare_enable(sdd->ioclk); + if (ret != 0) + return ret; + } + ret = clk_prepare_enable(sdd->src_clk); if (ret != 0) - return ret; + goto err_disable_ioclk; ret = clk_prepare_enable(sdd->clk); - if (ret != 0) { - clk_disable_unprepare(sdd->src_clk); - return ret; - } + if (ret != 0) + goto err_disable_src_clk; return 0; + +err_disable_src_clk: + clk_disable_unprepare(sdd->src_clk); +err_disable_ioclk: + clk_disable_unprepare(sdd->ioclk); + + return ret; } #endif /* CONFIG_PM */ @@ -1350,6 +1387,16 @@ static struct s3c64xx_spi_port_config exynos7_spi_port_config = { .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, }; +static struct s3c64xx_spi_port_config exynos5433_spi_port_config = { + .fifo_lvl_mask = { 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff}, + .rx_lvl_offset = 15, + .tx_st_done = 25, + .high_speed = true, + .clk_from_cmu = true, + .clk_ioclk = true, + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, +}; + static const struct platform_device_id s3c64xx_spi_driver_ids[] = { { .name = "s3c2443-spi", @@ -1380,6 +1427,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = { { .compatible = "samsung,exynos7-spi", .data = (void *)&exynos7_spi_port_config, }, + { .compatible = "samsung,exynos5433-spi", + .data = (void *)&exynos5433_spi_port_config, + }, { }, }; MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match); diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index a7934ab..0f83ad1 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -45,7 +45,6 @@ struct sh_msiof_spi_priv { void __iomem *mapbase; struct clk *clk; struct platform_device *pdev; - const struct sh_msiof_chipdata *chipdata; struct sh_msiof_spi_info *info; struct completion done; unsigned int tx_fifo_size; @@ -271,7 +270,7 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p, scr = sh_msiof_spi_div_table[k].brdv | SCR_BRPS(brps); sh_msiof_write(p, TSCR, scr); - if (!(p->chipdata->master_flags & SPI_MASTER_MUST_TX)) + if (!(p->master->flags & SPI_MASTER_MUST_TX)) sh_msiof_write(p, RSCR, scr); } @@ -336,7 +335,7 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p, tmp |= lsb_first << MDR1_BITLSB_SHIFT; tmp |= sh_msiof_spi_get_dtdl_and_syncdl(p); sh_msiof_write(p, TMDR1, tmp | MDR1_TRMD | TMDR1_PCON); - if (p->chipdata->master_flags & SPI_MASTER_MUST_TX) { + if (p->master->flags & SPI_MASTER_MUST_TX) { /* These bits are reserved if RX needs TX */ tmp &= ~0x0000ffff; } @@ -360,7 +359,7 @@ static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p, { u32 dr2 = MDR2_BITLEN1(bits) | MDR2_WDLEN1(words); - if (tx_buf || (p->chipdata->master_flags & SPI_MASTER_MUST_TX)) + if (tx_buf || (p->master->flags & SPI_MASTER_MUST_TX)) sh_msiof_write(p, TMDR2, dr2); else sh_msiof_write(p, TMDR2, dr2 | MDR2_GRPMASK1); @@ -1152,6 +1151,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) { struct resource *r; struct spi_master *master; + const struct sh_msiof_chipdata *chipdata; const struct of_device_id *of_id; struct sh_msiof_spi_priv *p; int i; @@ -1170,10 +1170,10 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) of_id = of_match_device(sh_msiof_match, &pdev->dev); if (of_id) { - p->chipdata = of_id->data; + chipdata = of_id->data; p->info = sh_msiof_spi_parse_dt(&pdev->dev); } else { - p->chipdata = (const void *)pdev->id_entry->driver_data; + chipdata = (const void *)pdev->id_entry->driver_data; p->info = dev_get_platdata(&pdev->dev); } @@ -1217,8 +1217,8 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); /* Platform data may override FIFO sizes */ - p->tx_fifo_size = p->chipdata->tx_fifo_size; - p->rx_fifo_size = p->chipdata->rx_fifo_size; + p->tx_fifo_size = chipdata->tx_fifo_size; + p->rx_fifo_size = chipdata->rx_fifo_size; if (p->info->tx_fifo_override) p->tx_fifo_size = p->info->tx_fifo_override; if (p->info->rx_fifo_override) @@ -1227,7 +1227,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) /* init master code */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE; - master->flags = p->chipdata->master_flags; + master->flags = chipdata->master_flags; master->bus_num = pdev->id; master->dev.of_node = pdev->dev.of_node; master->num_chipselect = p->info->num_chipselect; diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c index 5025011..2bf53f0 100644 --- a/drivers/spi/spi-sh.c +++ b/drivers/spi/spi-sh.c @@ -82,7 +82,6 @@ struct spi_sh_data { int irq; struct spi_master *master; struct list_head queue; - struct workqueue_struct *workqueue; struct work_struct ws; unsigned long cr1; wait_queue_head_t wait; @@ -380,7 +379,7 @@ static int spi_sh_transfer(struct spi_device *spi, struct spi_message *mesg) spi_sh_clear_bit(ss, SPI_SH_SSA, SPI_SH_CR1); list_add_tail(&mesg->queue, &ss->queue); - queue_work(ss->workqueue, &ss->ws); + schedule_work(&ss->ws); spin_unlock_irqrestore(&ss->lock, flags); @@ -425,7 +424,7 @@ static int spi_sh_remove(struct platform_device *pdev) struct spi_sh_data *ss = platform_get_drvdata(pdev); spi_unregister_master(ss->master); - destroy_workqueue(ss->workqueue); + flush_work(&ss->ws); free_irq(ss->irq, ss); return 0; @@ -484,18 +483,11 @@ static int spi_sh_probe(struct platform_device *pdev) spin_lock_init(&ss->lock); INIT_WORK(&ss->ws, spi_sh_work); init_waitqueue_head(&ss->wait); - ss->workqueue = create_singlethread_workqueue( - dev_name(master->dev.parent)); - if (ss->workqueue == NULL) { - dev_err(&pdev->dev, "create workqueue error\n"); - ret = -EBUSY; - goto error1; - } ret = request_irq(irq, spi_sh_irq, 0, "spi_sh", ss); if (ret < 0) { dev_err(&pdev->dev, "request_irq error\n"); - goto error2; + goto error1; } master->num_chipselect = 2; @@ -514,8 +506,6 @@ static int spi_sh_probe(struct platform_device *pdev) error3: free_irq(irq, ss); - error2: - destroy_workqueue(ss->workqueue); error1: spi_master_put(master); |