diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_lpss.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_lpss.c | 76 |
1 files changed, 50 insertions, 26 deletions
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 53ca9ba6ab4b..5f72ef3ea574 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -14,7 +14,7 @@ #include <linux/dmaengine.h> #include <linux/dma/dw.h> -#include "8250.h" +#include "8250_dwlib.h" #define PCI_DEVICE_ID_INTEL_QRK_UARTx 0x0936 @@ -24,6 +24,13 @@ #define PCI_DEVICE_ID_INTEL_BSW_UART1 0x228a #define PCI_DEVICE_ID_INTEL_BSW_UART2 0x228c +#define PCI_DEVICE_ID_INTEL_EHL_UART0 0x4b96 +#define PCI_DEVICE_ID_INTEL_EHL_UART1 0x4b97 +#define PCI_DEVICE_ID_INTEL_EHL_UART2 0x4b98 +#define PCI_DEVICE_ID_INTEL_EHL_UART3 0x4b99 +#define PCI_DEVICE_ID_INTEL_EHL_UART4 0x4b9a +#define PCI_DEVICE_ID_INTEL_EHL_UART5 0x4b9b + #define PCI_DEVICE_ID_INTEL_BDW_UART1 0x9ce3 #define PCI_DEVICE_ID_INTEL_BDW_UART2 0x9ce4 @@ -48,21 +55,25 @@ struct lpss8250_board { }; struct lpss8250 { - int line; + struct dw8250_port_data data; struct lpss8250_board *board; /* DMA parameters */ - struct uart_8250_dma dma; struct dw_dma_chip dma_chip; struct dw_dma_slave dma_param; u8 dma_maxburst; }; +static inline struct lpss8250 *to_lpss8250(struct dw8250_port_data *data) +{ + return container_of(data, struct lpss8250, data); +} + static void byt_set_termios(struct uart_port *p, struct ktermios *termios, struct ktermios *old) { unsigned int baud = tty_termios_baud_rate(termios); - struct lpss8250 *lpss = p->private_data; + struct lpss8250 *lpss = to_lpss8250(p->private_data); unsigned long fref = lpss->board->freq, fuart = baud * 16; unsigned long w = BIT(15) - 1; unsigned long m, n; @@ -109,7 +120,6 @@ static unsigned int byt_get_mctrl(struct uart_port *port) static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port) { struct dw_dma_slave *param = &lpss->dma_param; - struct uart_8250_port *up = up_to_u8250p(port); struct pci_dev *pdev = to_pci_dev(port->dev); unsigned int dma_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); struct pci_dev *dma_dev = pci_get_slot(pdev->bus, dma_devfn); @@ -135,10 +145,6 @@ static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port) param->m_master = 0; param->p_master = 1; - /* TODO: Detect FIFO size automaticaly for DesignWare 8250 */ - port->fifosize = 64; - up->tx_loadsz = 64; - lpss->dma_maxburst = 16; port->set_termios = byt_set_termios; @@ -163,16 +169,19 @@ static const struct dw_dma_platform_data qrk_serial_dma_pdata = { static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) { - struct uart_8250_dma *dma = &lpss->dma; + struct uart_8250_dma *dma = &lpss->data.dma; struct dw_dma_chip *chip = &lpss->dma_chip; struct dw_dma_slave *param = &lpss->dma_param; struct pci_dev *pdev = to_pci_dev(port->dev); int ret; + chip->pdata = &qrk_serial_dma_pdata; chip->dev = &pdev->dev; + chip->id = pdev->devfn; chip->irq = pci_irq_vector(pdev, 0); chip->regs = pci_ioremap_bar(pdev, 1); - chip->pdata = &qrk_serial_dma_pdata; + if (!chip->regs) + return; /* Falling back to PIO mode if DMA probing fails */ ret = dw_dma_probe(chip); @@ -195,11 +204,15 @@ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) static void qrk_serial_exit_dma(struct lpss8250 *lpss) { + struct dw_dma_chip *chip = &lpss->dma_chip; struct dw_dma_slave *param = &lpss->dma_param; if (!param->dma_dev) return; - dw_dma_remove(&lpss->dma_chip); + + dw_dma_remove(chip); + + pci_iounmap(to_pci_dev(chip->dev), chip->regs); } #else /* CONFIG_SERIAL_8250_DMA */ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) {} @@ -241,7 +254,7 @@ static bool lpss8250_dma_filter(struct dma_chan *chan, void *param) static int lpss8250_dma_setup(struct lpss8250 *lpss, struct uart_8250_port *port) { - struct uart_8250_dma *dma = &lpss->dma; + struct uart_8250_dma *dma = &lpss->data.dma; struct dw_dma_slave *rx_param, *tx_param; struct device *dev = port->port.dev; @@ -290,7 +303,7 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) uart.port.dev = &pdev->dev; uart.port.irq = pdev->irq; - uart.port.private_data = lpss; + uart.port.private_data = &lpss->data; uart.port.type = PORT_16550A; uart.port.iotype = UPIO_MEM; uart.port.regshift = 2; @@ -306,6 +319,8 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (ret) return ret; + dw8250_setup_port(&uart.port); + ret = lpss8250_dma_setup(lpss, &uart); if (ret) goto err_exit; @@ -314,7 +329,7 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (ret < 0) goto err_exit; - lpss->line = ret; + lpss->data.line = ret; pci_set_drvdata(pdev, lpss); return 0; @@ -329,7 +344,7 @@ static void lpss8250_remove(struct pci_dev *pdev) { struct lpss8250 *lpss = pci_get_drvdata(pdev); - serial8250_unregister_port(lpss->line); + serial8250_unregister_port(lpss->data.line); if (lpss->board->exit) lpss->board->exit(lpss); @@ -341,6 +356,11 @@ static const struct lpss8250_board byt_board = { .setup = byt_serial_setup, }; +static const struct lpss8250_board ehl_board = { + .freq = 200000000, + .base_baud = 12500000, +}; + static const struct lpss8250_board qrk_board = { .freq = 44236800, .base_baud = 2764800, @@ -348,17 +368,21 @@ static const struct lpss8250_board qrk_board = { .exit = qrk_serial_exit, }; -#define LPSS_DEVICE(id, board) { PCI_VDEVICE(INTEL, id), (kernel_ulong_t)&board } - static const struct pci_device_id pci_ids[] = { - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_QRK_UARTx, qrk_board), - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BYT_UART1, byt_board), - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BYT_UART2, byt_board), - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BSW_UART1, byt_board), - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BSW_UART2, byt_board), - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BDW_UART1, byt_board), - LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BDW_UART2, byt_board), - { }, + { PCI_DEVICE_DATA(INTEL, QRK_UARTx, &qrk_board) }, + { PCI_DEVICE_DATA(INTEL, EHL_UART0, &ehl_board) }, + { PCI_DEVICE_DATA(INTEL, EHL_UART1, &ehl_board) }, + { PCI_DEVICE_DATA(INTEL, EHL_UART2, &ehl_board) }, + { PCI_DEVICE_DATA(INTEL, EHL_UART3, &ehl_board) }, + { PCI_DEVICE_DATA(INTEL, EHL_UART4, &ehl_board) }, + { PCI_DEVICE_DATA(INTEL, EHL_UART5, &ehl_board) }, + { PCI_DEVICE_DATA(INTEL, BYT_UART1, &byt_board) }, + { PCI_DEVICE_DATA(INTEL, BYT_UART2, &byt_board) }, + { PCI_DEVICE_DATA(INTEL, BSW_UART1, &byt_board) }, + { PCI_DEVICE_DATA(INTEL, BSW_UART2, &byt_board) }, + { PCI_DEVICE_DATA(INTEL, BDW_UART1, &byt_board) }, + { PCI_DEVICE_DATA(INTEL, BDW_UART2, &byt_board) }, + { } }; MODULE_DEVICE_TABLE(pci, pci_ids); |