diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_pci.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_pci.c | 78 |
1 files changed, 67 insertions, 11 deletions
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 4f1cd296f1b1..beb9d71cd47a 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -25,6 +25,9 @@ #include <asm/byteorder.h> #include <asm/io.h> +#include <linux/dmaengine.h> +#include <linux/platform_data/dma-dw.h> + #include "8250.h" /* @@ -1349,6 +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 @@ -1414,7 +1420,13 @@ 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 @@ -1422,35 +1434,57 @@ 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; + 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: - dma->rx_chan_id = 5; - dma->tx_chan_id = 4; + case PCI_DEVICE_ID_INTEL_BSW_UART2: + 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; @@ -1893,6 +1927,20 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .subdevice = PCI_ANY_ID, .setup = pci_default_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 */ @@ -5192,6 +5240,14 @@ 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 }, /* * Intel Quark x1000 |