diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_pci.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_pci.c | 229 |
1 files changed, 7 insertions, 222 deletions
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 68042dd1c525..4097f3f65b3b 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -28,7 +28,6 @@ #include <linux/dmaengine.h> #include <linux/platform_data/dma-dw.h> -#include <linux/platform_data/dma-hsu.h> #include "8250.h" @@ -1508,167 +1507,6 @@ byt_serial_setup(struct serial_private *priv, return ret; } -#define INTEL_MID_UART_PS 0x30 -#define INTEL_MID_UART_MUL 0x34 -#define INTEL_MID_UART_DIV 0x38 - -static void intel_mid_set_termios(struct uart_port *p, - struct ktermios *termios, - struct ktermios *old, - unsigned long fref) -{ - unsigned int baud = tty_termios_baud_rate(termios); - unsigned short ps = 16; - unsigned long fuart = baud * ps; - unsigned long w = BIT(24) - 1; - unsigned long mul, div; - - if (fref < fuart) { - /* Find prescaler value that satisfies Fuart < Fref */ - if (fref > baud) - ps = fref / baud; /* baud rate too high */ - else - ps = 1; /* PLL case */ - fuart = baud * ps; - } else { - /* Get Fuart closer to Fref */ - fuart *= rounddown_pow_of_two(fref / fuart); - } - - rational_best_approximation(fuart, fref, w, w, &mul, &div); - p->uartclk = fuart * 16 / ps; /* core uses ps = 16 always */ - - writel(ps, p->membase + INTEL_MID_UART_PS); /* set PS */ - writel(mul, p->membase + INTEL_MID_UART_MUL); /* set MUL */ - writel(div, p->membase + INTEL_MID_UART_DIV); - - serial8250_do_set_termios(p, termios, old); -} - -static void intel_mid_set_termios_38_4M(struct uart_port *p, - struct ktermios *termios, - struct ktermios *old) -{ - intel_mid_set_termios(p, termios, old, 38400000); -} - -static void intel_mid_set_termios_50M(struct uart_port *p, - struct ktermios *termios, - struct ktermios *old) -{ - /* - * The uart clk is 50Mhz, and the baud rate come from: - * baud = 50M * MUL / (DIV * PS * DLAB) - */ - intel_mid_set_termios(p, termios, old, 50000000); -} - -static bool intel_mid_dma_filter(struct dma_chan *chan, void *param) -{ - struct hsu_dma_slave *s = param; - - if (s->dma_dev != chan->device->dev || s->chan_id != chan->chan_id) - return false; - - chan->private = s; - return true; -} - -static int intel_mid_serial_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_8250_port *port, int idx, - int index, struct pci_dev *dma_dev) -{ - struct device *dev = port->port.dev; - struct uart_8250_dma *dma; - struct hsu_dma_slave *tx_param, *rx_param; - - dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); - if (!dma) - return -ENOMEM; - - 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; - - rx_param->chan_id = index * 2 + 1; - tx_param->chan_id = index * 2; - - dma->rxconf.src_maxburst = 64; - dma->txconf.dst_maxburst = 64; - - rx_param->dma_dev = &dma_dev->dev; - tx_param->dma_dev = &dma_dev->dev; - - dma->fn = intel_mid_dma_filter; - dma->rx_param = rx_param; - dma->tx_param = tx_param; - - port->port.type = PORT_16750; - port->port.flags |= UPF_FIXED_PORT | UPF_FIXED_TYPE; - port->dma = dma; - - return pci_default_setup(priv, board, port, idx); -} - -#define PCI_DEVICE_ID_INTEL_PNW_UART1 0x081b -#define PCI_DEVICE_ID_INTEL_PNW_UART2 0x081c -#define PCI_DEVICE_ID_INTEL_PNW_UART3 0x081d - -static int pnw_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 pci_dev *dma_dev; - int index; - - switch (pdev->device) { - case PCI_DEVICE_ID_INTEL_PNW_UART1: - index = 0; - break; - case PCI_DEVICE_ID_INTEL_PNW_UART2: - index = 1; - break; - case PCI_DEVICE_ID_INTEL_PNW_UART3: - index = 2; - break; - default: - return -EINVAL; - } - - dma_dev = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 3)); - - port->port.set_termios = intel_mid_set_termios_50M; - - return intel_mid_serial_setup(priv, board, port, idx, index, dma_dev); -} - -#define PCI_DEVICE_ID_INTEL_TNG_UART 0x1191 - -static int tng_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 pci_dev *dma_dev; - int index = PCI_FUNC(pdev->devfn); - - /* Currently no support for HSU port0 */ - if (index-- == 0) - return -ENODEV; - - dma_dev = pci_get_slot(pdev->bus, PCI_DEVFN(5, 0)); - - port->port.set_termios = intel_mid_set_termios_38_4M; - - return intel_mid_serial_setup(priv, board, port, idx, index, dma_dev); -} - static int pci_omegapci_setup(struct serial_private *priv, const struct pciserial_board *board, @@ -2212,34 +2050,6 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { }, { .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_PNW_UART1, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = pnw_serial_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_PNW_UART2, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = pnw_serial_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_PNW_UART3, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = pnw_serial_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_TNG_UART, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = tng_serial_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, .device = PCI_DEVICE_ID_INTEL_BSW_UART1, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, @@ -3119,8 +2929,6 @@ enum pci_board_num_t { pbn_ADDIDATA_PCIe_8_3906250, pbn_ce4100_1_115200, pbn_byt, - pbn_pnw, - pbn_tng, pbn_qrk, pbn_omegapci, pbn_NETMOS9900_2s_115200, @@ -3907,16 +3715,6 @@ static struct pciserial_board pci_boards[] = { .uart_offset = 0x80, .reg_shift = 2, }, - [pbn_pnw] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 115200, - }, - [pbn_tng] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 1843200, - }, [pbn_qrk] = { .flags = FL_BASE0, .num_ports = 1, @@ -4005,6 +3803,13 @@ static const struct pci_device_id blacklist[] = { { PCI_DEVICE(0x4348, 0x5053), }, /* WCH CH353 1S1P */ { PCI_DEVICE(0x1c00, 0x3250), }, /* WCH CH382 2S1P */ { PCI_DEVICE(0x1c00, 0x3470), }, /* WCH CH384 4S */ + + /* Intel platforms with MID UART */ + { PCI_VDEVICE(INTEL, 0x081b), }, + { PCI_VDEVICE(INTEL, 0x081c), }, + { PCI_VDEVICE(INTEL, 0x081d), }, + { PCI_VDEVICE(INTEL, 0x1191), }, + { PCI_VDEVICE(INTEL, 0x19d8), }, }; /* @@ -5702,26 +5507,6 @@ static struct pci_device_id serial_pci_tbl[] = { pbn_byt }, /* - * Intel Penwell - */ - { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PNW_UART1, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_pnw}, - { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PNW_UART2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_pnw}, - { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PNW_UART3, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_pnw}, - - /* - * Intel Tangier - */ - { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TNG_UART, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_tng}, - - /* * Intel Quark x1000 */ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_QRK_UART, |