From 9a1870ce812e13091c21af36d4dc1cd29077966d Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 19 Aug 2014 20:29:22 +0300 Subject: serial: 8250: don't use slave_id of dma_slave_config That field has been deprecated in favour of getting the necessary information from ACPI or DT. However, we still need to deal systems that are PCI only (no ACPI to back up) like Intel Bay Trail. In order to support such systems, we explicitly bind setup() to the appropriate DMA filter function and its corresponding parameter. Then when serial8250_request_dma() doesn't find the channel via ACPI or DT, it falls back to use the given filter function. Signed-off-by: Andy Shevchenko Acked-by: Greg Kroah-Hartman Signed-off-by: Vinod Koul --- drivers/tty/serial/8250/8250.h | 6 ++--- drivers/tty/serial/8250/8250_dw.c | 7 +----- drivers/tty/serial/8250/8250_pci.c | 51 ++++++++++++++++++++++++++++++-------- 3 files changed, 44 insertions(+), 20 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 1b08c918cd51..c3c70913e040 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -16,13 +16,13 @@ #include struct uart_8250_dma { + /* Filter function */ dma_filter_fn fn; + + /* Parameter to the filter function */ void *rx_param; void *tx_param; - int rx_chan_id; - int tx_chan_id; - struct dma_slave_config rxconf; struct dma_slave_config txconf; diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 4db7987ec225..6664de2cdfdb 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -216,10 +216,7 @@ out: static bool dw8250_dma_filter(struct dma_chan *chan, void *param) { - struct dw8250_data *data = param; - - return chan->chan_id == data->dma.tx_chan_id || - chan->chan_id == data->dma.rx_chan_id; + return false; } static void dw8250_setup_port(struct uart_8250_port *up) @@ -399,8 +396,6 @@ static int dw8250_probe(struct platform_device *pdev) if (!IS_ERR(data->rst)) reset_control_deassert(data->rst); - data->dma.rx_chan_id = -1; - data->dma.tx_chan_id = -1; data->dma.rx_param = data; data->dma.tx_param = data; data->dma.fn = dw8250_dma_filter; diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 61830b1792eb..a00c9de814d1 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -25,6 +25,9 @@ #include #include +#include +#include + #include "8250.h" /* @@ -1427,7 +1430,13 @@ byt_set_termios(struct uart_port *p, struct ktermios *termios, static bool byt_dma_filter(struct dma_chan *chan, void *param) { - return chan->chan_id == *(int *)param; + struct dw_dma_slave *dws = param; + + if (dws->dma_dev != chan->device->dev) + return false; + + chan->private = dws; + return true; } static int @@ -1435,35 +1444,55 @@ byt_serial_setup(struct serial_private *priv, const struct pciserial_board *board, struct uart_8250_port *port, int idx) { + struct pci_dev *pdev = priv->dev; + struct device *dev = port->port.dev; struct uart_8250_dma *dma; + struct dw_dma_slave *tx_param, *rx_param; + struct pci_dev *dma_dev; int ret; - dma = devm_kzalloc(port->port.dev, sizeof(*dma), GFP_KERNEL); + dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); if (!dma) return -ENOMEM; - switch (priv->dev->device) { + tx_param = devm_kzalloc(dev, sizeof(*tx_param), GFP_KERNEL); + if (!tx_param) + return -ENOMEM; + + rx_param = devm_kzalloc(dev, sizeof(*rx_param), GFP_KERNEL); + if (!rx_param) + return -ENOMEM; + + switch (pdev->device) { case PCI_DEVICE_ID_INTEL_BYT_UART1: - dma->rx_chan_id = 3; - dma->tx_chan_id = 2; + rx_param->src_id = 3; + tx_param->dst_id = 2; break; case PCI_DEVICE_ID_INTEL_BYT_UART2: - dma->rx_chan_id = 5; - dma->tx_chan_id = 4; + rx_param->src_id = 5; + tx_param->dst_id = 4; break; default: return -EINVAL; } - dma->rxconf.slave_id = dma->rx_chan_id; + rx_param->src_master = 1; + rx_param->dst_master = 0; + dma->rxconf.src_maxburst = 16; - dma->txconf.slave_id = dma->tx_chan_id; + tx_param->src_master = 1; + tx_param->dst_master = 0; + dma->txconf.dst_maxburst = 16; + dma_dev = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); + rx_param->dma_dev = &dma_dev->dev; + tx_param->dma_dev = &dma_dev->dev; + dma->fn = byt_dma_filter; - dma->rx_param = &dma->rx_chan_id; - dma->tx_param = &dma->tx_chan_id; + dma->rx_param = rx_param; + dma->tx_param = tx_param; ret = pci_default_setup(priv, board, port, idx); port->port.iotype = UPIO_MEM; -- cgit v1.2.3 From 29897087d90109a7ed67e68dbbc6fb077301c7d1 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 19 Aug 2014 20:29:23 +0300 Subject: serial: 8250_pci: Add PCI IDs for Intel Braswell Add new PCI IDs to cover newer Intel SoCs such as Braswell. Signed-off-by: Alan Cox Signed-off-by: Mika Westerberg Signed-off-by: Andy Shevchenko Acked-by: Greg Kroah-Hartman Signed-off-by: Vinod Koul --- drivers/tty/serial/8250/8250_pci.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index a00c9de814d1..85a2eb986ffe 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1352,6 +1352,9 @@ ce4100_serial_setup(struct serial_private *priv, #define PCI_DEVICE_ID_INTEL_BYT_UART1 0x0f0a #define PCI_DEVICE_ID_INTEL_BYT_UART2 0x0f0c +#define PCI_DEVICE_ID_INTEL_BSW_UART1 0x228a +#define PCI_DEVICE_ID_INTEL_BSW_UART2 0x228c + #define BYT_PRV_CLK 0x800 #define BYT_PRV_CLK_EN (1 << 0) #define BYT_PRV_CLK_M_VAL_SHIFT 1 @@ -1465,10 +1468,12 @@ byt_serial_setup(struct serial_private *priv, switch (pdev->device) { case PCI_DEVICE_ID_INTEL_BYT_UART1: + case PCI_DEVICE_ID_INTEL_BSW_UART1: rx_param->src_id = 3; tx_param->dst_id = 2; break; case PCI_DEVICE_ID_INTEL_BYT_UART2: + case PCI_DEVICE_ID_INTEL_BSW_UART2: rx_param->src_id = 5; tx_param->dst_id = 4; break; @@ -1927,6 +1932,20 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .subdevice = PCI_ANY_ID, .setup = byt_serial_setup, }, + { + .vendor = PCI_VENDOR_ID_INTEL, + .device = PCI_DEVICE_ID_INTEL_BSW_UART1, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = byt_serial_setup, + }, + { + .vendor = PCI_VENDOR_ID_INTEL, + .device = PCI_DEVICE_ID_INTEL_BSW_UART2, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = byt_serial_setup, + }, /* * ITE */ @@ -5219,6 +5238,14 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_COMMUNICATION_SERIAL << 8, 0xff0000, pbn_byt }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW_UART1, + PCI_ANY_ID, PCI_ANY_ID, + PCI_CLASS_COMMUNICATION_SERIAL << 8, 0xff0000, + pbn_byt }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW_UART2, + PCI_ANY_ID, PCI_ANY_ID, + PCI_CLASS_COMMUNICATION_SERIAL << 8, 0xff0000, + pbn_byt }, /* * Cronyx Omega PCI -- cgit v1.2.3 From 2bcd90d56c6025189be98bed47c80c5261855a7e Mon Sep 17 00:00:00 2001 From: Vinod Koul Date: Sat, 11 Oct 2014 21:10:37 +0530 Subject: serial: sh-sci: use dmaengine_terminate_all() API The drivers should use dmaengine_terminate_all() API instead of accessing the device_control which will be deprecated soon Acked-by: Greg Kroah-Hartman Signed-off-by: Vinod Koul --- drivers/tty/serial/sh-sci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 3081e46085ce..eb17c7124e72 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1403,7 +1403,7 @@ static void work_fn_rx(struct work_struct *work) unsigned long flags; int count; - chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); + dmaengine_terminate_all(chan); dev_dbg(port->dev, "Read %zu bytes with cookie %d\n", sh_desc->partial, sh_desc->cookie); -- cgit v1.2.3 From 6b997bab20448cfe85456e4789d5d9222ab6b830 Mon Sep 17 00:00:00 2001 From: Vinod Koul Date: Thu, 16 Oct 2014 12:59:06 +0530 Subject: serial: atmel: add missing dmaengine header The atmel serial driver uses dmaengine APIs but never included the dmaengine header as it was getting inculded thru one of driver headers. commit 3d588f83e4d6a5230d9094b97d38621cbaa9a972 - "dmaengine: dw: split dma-dw.h to platform and private parts" broke this as it moved headers around. Fix this by doing the right thing to include the dmaengine header Reported-by: kbuild test robot Fixes: 08f738be88bb (serial: at91: add tx dma support) Acked-by: Greg Kroah-Hartman Signed-off-by: Vinod Koul --- drivers/tty/serial/atmel_serial.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 7b63677475c1..d8185c7f476f 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -37,6 +37,7 @@ #include #include #include +#include #include #include #include -- cgit v1.2.3