diff options
Diffstat (limited to 'kernel/drivers/tty/serial')
| -rw-r--r-- | kernel/drivers/tty/serial/8250/8250_dw.c | 2 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/8250/8250_mid.c | 38 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/8250/8250_pci.c | 142 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/8250/8250_port.c | 22 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/atmel_serial.c | 58 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/msm_serial.c | 2 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/samsung.c | 22 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/sh-sci.c | 39 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/sunhv.c | 6 | ||||
| -rw-r--r-- | kernel/drivers/tty/serial/ucc_uart.c | 3 |
10 files changed, 246 insertions, 88 deletions
diff --git a/kernel/drivers/tty/serial/8250/8250_dw.c b/kernel/drivers/tty/serial/8250/8250_dw.c index a5d319e4a..8435c3f20 100644 --- a/kernel/drivers/tty/serial/8250/8250_dw.c +++ b/kernel/drivers/tty/serial/8250/8250_dw.c @@ -440,7 +440,7 @@ static int dw8250_probe(struct platform_device *pdev) } data->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); - if (IS_ERR(data->clk) && PTR_ERR(data->clk) == -EPROBE_DEFER) { + if (IS_ERR(data->pclk) && PTR_ERR(data->pclk) == -EPROBE_DEFER) { err = -EPROBE_DEFER; goto err_clk; } diff --git a/kernel/drivers/tty/serial/8250/8250_mid.c b/kernel/drivers/tty/serial/8250/8250_mid.c index 88531a36b..83b3988eb 100644 --- a/kernel/drivers/tty/serial/8250/8250_mid.c +++ b/kernel/drivers/tty/serial/8250/8250_mid.c @@ -14,6 +14,7 @@ #include <linux/pci.h> #include <linux/dma/hsu.h> +#include <linux/8250_pci.h> #include "8250.h" @@ -24,6 +25,7 @@ #define PCI_DEVICE_ID_INTEL_DNV_UART 0x19d8 /* Intel MID Specific registers */ +#define INTEL_MID_UART_DNV_FISR 0x08 #define INTEL_MID_UART_PS 0x30 #define INTEL_MID_UART_MUL 0x34 #define INTEL_MID_UART_DIV 0x38 @@ -31,6 +33,7 @@ struct mid8250; struct mid8250_board { + unsigned int flags; unsigned long freq; unsigned int base_baud; int (*setup)(struct mid8250 *, struct uart_port *p); @@ -88,16 +91,16 @@ static int tng_setup(struct mid8250 *mid, struct uart_port *p) static int dnv_handle_irq(struct uart_port *p) { struct mid8250 *mid = p->private_data; - int ret; - - ret = hsu_dma_irq(&mid->dma_chip, 0); - ret |= hsu_dma_irq(&mid->dma_chip, 1); - - /* For now, letting the HW generate separate interrupt for the UART */ - if (ret) - return ret; - - return serial8250_handle_irq(p, serial_port_in(p, UART_IIR)); + unsigned int fisr = serial_port_in(p, INTEL_MID_UART_DNV_FISR); + int ret = IRQ_NONE; + + if (fisr & BIT(2)) + ret |= hsu_dma_irq(&mid->dma_chip, 1); + if (fisr & BIT(1)) + ret |= hsu_dma_irq(&mid->dma_chip, 0); + if (fisr & BIT(0)) + ret |= serial8250_handle_irq(p, serial_port_in(p, UART_IIR)); + return ret; } #define DNV_DMA_CHAN_OFFSET 0x80 @@ -106,12 +109,13 @@ static int dnv_setup(struct mid8250 *mid, struct uart_port *p) { struct hsu_dma_chip *chip = &mid->dma_chip; struct pci_dev *pdev = to_pci_dev(p->dev); + unsigned int bar = FL_GET_BASE(mid->board->flags); int ret; chip->dev = &pdev->dev; chip->irq = pdev->irq; chip->regs = p->membase; - chip->length = pci_resource_len(pdev, 0); + chip->length = pci_resource_len(pdev, bar); chip->offset = DNV_DMA_CHAN_OFFSET; /* Falling back to PIO mode if DMA probing fails */ @@ -145,6 +149,9 @@ static void mid8250_set_termios(struct uart_port *p, unsigned long w = BIT(24) - 1; unsigned long mul, div; + /* Gracefully handle the B0 case: fall back to B9600 */ + fuart = fuart ? fuart : 9600 * 16; + if (mid->board->freq < fuart) { /* Find prescaler value that satisfies Fuart < Fref */ if (mid->board->freq > baud) @@ -217,6 +224,7 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct uart_8250_port uart; struct mid8250 *mid; + unsigned int bar; int ret; ret = pcim_enable_device(pdev); @@ -230,6 +238,7 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) return -ENOMEM; mid->board = (struct mid8250_board *)id->driver_data; + bar = FL_GET_BASE(mid->board->flags); memset(&uart, 0, sizeof(struct uart_8250_port)); @@ -242,8 +251,8 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) uart.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE; uart.port.set_termios = mid8250_set_termios; - uart.port.mapbase = pci_resource_start(pdev, 0); - uart.port.membase = pcim_iomap(pdev, 0, 0); + uart.port.mapbase = pci_resource_start(pdev, bar); + uart.port.membase = pcim_iomap(pdev, bar, 0); if (!uart.port.membase) return -ENOMEM; @@ -282,18 +291,21 @@ static void mid8250_remove(struct pci_dev *pdev) } static const struct mid8250_board pnw_board = { + .flags = FL_BASE0, .freq = 50000000, .base_baud = 115200, .setup = pnw_setup, }; static const struct mid8250_board tng_board = { + .flags = FL_BASE0, .freq = 38400000, .base_baud = 1843200, .setup = tng_setup, }; static const struct mid8250_board dnv_board = { + .flags = FL_BASE1, .freq = 133333333, .base_baud = 115200, .setup = dnv_setup, diff --git a/kernel/drivers/tty/serial/8250/8250_pci.c b/kernel/drivers/tty/serial/8250/8250_pci.c index 7cd6f9a90..029de3f99 100644 --- a/kernel/drivers/tty/serial/8250/8250_pci.c +++ b/kernel/drivers/tty/serial/8250/8250_pci.c @@ -1401,6 +1401,9 @@ byt_set_termios(struct uart_port *p, struct ktermios *termios, unsigned long m, n; u32 reg; + /* Gracefully handle the B0 case: fall back to B9600 */ + fuart = fuart ? fuart : 9600 * 16; + /* Get Fuart closer to Fref */ fuart *= rounddown_pow_of_two(fref / fuart); @@ -1949,6 +1952,43 @@ pci_wch_ch38x_setup(struct serial_private *priv, #define PCI_DEVICE_ID_PERICOM_PI7C9X7954 0x7954 #define PCI_DEVICE_ID_PERICOM_PI7C9X7958 0x7958 +#define PCI_VENDOR_ID_ACCESIO 0x494f +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB 0x1051 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S 0x1053 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB 0x105C +#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S 0x105E +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB 0x1091 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2 0x1093 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB 0x1099 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4 0x109B +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB 0x10D1 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM 0x10D3 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB 0x10DA +#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM 0x10DC +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1 0x1108 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2 0x1110 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2 0x1111 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4 0x1118 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4 0x1119 +#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S 0x1152 +#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S 0x115A +#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2 0x1190 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2 0x1191 +#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4 0x1198 +#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4 0x1199 +#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM 0x11D0 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4 0x105A +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4 0x105B +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8 0x106A +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8 0x106B +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4 0x1098 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8 0x10A9 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM 0x10D9 +#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM 0x10E9 +#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM 0x11D8 + + + /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 #define PCI_SUBDEVICE_ID_UNKNOWN_0x1588 0x1588 @@ -5117,6 +5157,108 @@ static struct pci_device_id serial_pci_tbl[] = { 0, 0, pbn_pericom_PI7C9X7958 }, /* + * ACCES I/O Products quad + */ + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7954 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_pericom_PI7C9X7958 }, + /* * Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke) */ { PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560, diff --git a/kernel/drivers/tty/serial/8250/8250_port.c b/kernel/drivers/tty/serial/8250/8250_port.c index 5568d70ee..a0b9e8546 100644 --- a/kernel/drivers/tty/serial/8250/8250_port.c +++ b/kernel/drivers/tty/serial/8250/8250_port.c @@ -714,22 +714,16 @@ static int size_fifo(struct uart_8250_port *up) */ static unsigned int autoconfig_read_divisor_id(struct uart_8250_port *p) { - unsigned char old_dll, old_dlm, old_lcr; - unsigned int id; + unsigned char old_lcr; + unsigned int id, old_dl; old_lcr = serial_in(p, UART_LCR); serial_out(p, UART_LCR, UART_LCR_CONF_MODE_A); + old_dl = serial_dl_read(p); + serial_dl_write(p, 0); + id = serial_dl_read(p); + serial_dl_write(p, old_dl); - old_dll = serial_in(p, UART_DLL); - old_dlm = serial_in(p, UART_DLM); - - serial_out(p, UART_DLL, 0); - serial_out(p, UART_DLM, 0); - - id = serial_in(p, UART_DLL) | serial_in(p, UART_DLM) << 8; - - serial_out(p, UART_DLL, old_dll); - serial_out(p, UART_DLM, old_dlm); serial_out(p, UART_LCR, old_lcr); return id; @@ -2850,9 +2844,9 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s, serial8250_rpm_get(up); - if (port->sysrq) + if (port->sysrq || oops_in_progress) locked = 0; - else if (oops_in_progress || in_kdb_printk()) + else if (in_kdb_printk()) locked = spin_trylock_irqsave(&port->lock, flags); else spin_lock_irqsave(&port->lock, flags); diff --git a/kernel/drivers/tty/serial/atmel_serial.c b/kernel/drivers/tty/serial/atmel_serial.c index 942945589..a0f911641 100644 --- a/kernel/drivers/tty/serial/atmel_serial.c +++ b/kernel/drivers/tty/serial/atmel_serial.c @@ -277,6 +277,13 @@ static bool atmel_use_dma_rx(struct uart_port *port) return atmel_port->use_dma_rx; } +static bool atmel_use_fifo(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + return atmel_port->fifo_size; +} + static unsigned int atmel_get_lines_status(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); @@ -463,6 +470,14 @@ static void atmel_stop_tx(struct uart_port *port) /* disable PDC transmit */ atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS); } + + /* + * Disable the transmitter. + * This is mandatory when DMA is used, otherwise the DMA buffer + * is fully transmitted. + */ + atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXDIS); + /* Disable interrupts */ atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask); @@ -478,21 +493,26 @@ static void atmel_start_tx(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - if (atmel_use_pdc_tx(port)) { - if (atmel_uart_readl(port, ATMEL_PDC_PTSR) & ATMEL_PDC_TXTEN) - /* The transmitter is already running. Yes, we - really need this.*/ - return; + if (atmel_use_pdc_tx(port) && (atmel_uart_readl(port, ATMEL_PDC_PTSR) + & ATMEL_PDC_TXTEN)) + /* The transmitter is already running. Yes, we + really need this.*/ + return; + if (atmel_use_pdc_tx(port) || atmel_use_dma_tx(port)) if ((port->rs485.flags & SER_RS485_ENABLED) && !(port->rs485.flags & SER_RS485_RX_DURING_TX)) atmel_stop_rx(port); + if (atmel_use_pdc_tx(port)) /* re-enable PDC transmit */ atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN); - } + /* Enable interrupts */ atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask); + + /* re-enable the transmitter */ + atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN); } /* @@ -2066,6 +2086,7 @@ static void atmel_serial_pm(struct uart_port *port, unsigned int state, static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); unsigned long flags; unsigned int old_mode, mode, imr, quot, baud; @@ -2169,7 +2190,30 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, mode |= ATMEL_US_USMODE_RS485; } else if (termios->c_cflag & CRTSCTS) { /* RS232 with hardware handshake (RTS/CTS) */ - mode |= ATMEL_US_USMODE_HWHS; + if (atmel_use_fifo(port) && + !mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS)) { + /* + * with ATMEL_US_USMODE_HWHS set, the controller will + * be able to drive the RTS pin high/low when the RX + * FIFO is above RXFTHRES/below RXFTHRES2. + * It will also disable the transmitter when the CTS + * pin is high. + * This mode is not activated if CTS pin is a GPIO + * because in this case, the transmitter is always + * disabled (there must be an internal pull-up + * responsible for this behaviour). + * If the RTS pin is a GPIO, the controller won't be + * able to drive it according to the FIFO thresholds, + * but it will be handled by the driver. + */ + mode |= ATMEL_US_USMODE_HWHS; + } else { + /* + * For platforms without FIFO, the flow control is + * handled by the driver. + */ + mode |= ATMEL_US_USMODE_NORMAL; + } } else { /* RS232 without hadware handshake */ mode |= ATMEL_US_USMODE_NORMAL; diff --git a/kernel/drivers/tty/serial/msm_serial.c b/kernel/drivers/tty/serial/msm_serial.c index dcde95547..e1de4944e 100644 --- a/kernel/drivers/tty/serial/msm_serial.c +++ b/kernel/drivers/tty/serial/msm_serial.c @@ -726,7 +726,7 @@ static void msm_handle_tx(struct uart_port *port) return; } - pio_count = CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE); + pio_count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); dma_count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); dma_min = 1; /* Always DMA */ diff --git a/kernel/drivers/tty/serial/samsung.c b/kernel/drivers/tty/serial/samsung.c index d72cd736b..237ef5573 100644 --- a/kernel/drivers/tty/serial/samsung.c +++ b/kernel/drivers/tty/serial/samsung.c @@ -1263,6 +1263,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, /* check to see if we need to change clock source */ if (ourport->baudclk != clk) { + clk_prepare_enable(clk); + s3c24xx_serial_setsource(port, clk_sel); if (!IS_ERR(ourport->baudclk)) { @@ -1270,8 +1272,6 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, ourport->baudclk = ERR_PTR(-EINVAL); } - clk_prepare_enable(clk); - ourport->baudclk = clk; ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0; } @@ -1676,7 +1676,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, return -ENODEV; if (port->mapbase != 0) - return 0; + return -EINVAL; /* setup info for port */ port->dev = &platdev->dev; @@ -1730,22 +1730,25 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, ourport->dma = devm_kzalloc(port->dev, sizeof(*ourport->dma), GFP_KERNEL); - if (!ourport->dma) - return -ENOMEM; + if (!ourport->dma) { + ret = -ENOMEM; + goto err; + } } ourport->clk = clk_get(&platdev->dev, "uart"); if (IS_ERR(ourport->clk)) { pr_err("%s: Controller clock not found\n", dev_name(&platdev->dev)); - return PTR_ERR(ourport->clk); + ret = PTR_ERR(ourport->clk); + goto err; } ret = clk_prepare_enable(ourport->clk); if (ret) { pr_err("uart: clock failed to prepare+enable: %d\n", ret); clk_put(ourport->clk); - return ret; + goto err; } /* Keep all interrupts masked and cleared */ @@ -1761,7 +1764,12 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, /* reset the fifos (and setup the uart) */ s3c24xx_serial_resetport(port, cfg); + return 0; + +err: + port->mapbase = 0; + return ret; } /* Device driver serial port probe */ diff --git a/kernel/drivers/tty/serial/sh-sci.c b/kernel/drivers/tty/serial/sh-sci.c index 51c7507b0..63a06ab6b 100644 --- a/kernel/drivers/tty/serial/sh-sci.c +++ b/kernel/drivers/tty/serial/sh-sci.c @@ -38,7 +38,6 @@ #include <linux/major.h> #include <linux/module.h> #include <linux/mm.h> -#include <linux/notifier.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> @@ -116,8 +115,6 @@ struct sci_port { struct timer_list rx_timer; unsigned int rx_timeout; #endif - - struct notifier_block freq_transition; }; #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS @@ -1606,29 +1603,6 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) return ret; } -/* - * Here we define a transition notifier so that we can update all of our - * ports' baud rate when the peripheral clock changes. - */ -static int sci_notifier(struct notifier_block *self, - unsigned long phase, void *p) -{ - struct sci_port *sci_port; - unsigned long flags; - - sci_port = container_of(self, struct sci_port, freq_transition); - - if (phase == CPUFREQ_POSTCHANGE) { - struct uart_port *port = &sci_port->port; - - spin_lock_irqsave(&port->lock, flags); - port->uartclk = clk_get_rate(sci_port->iclk); - spin_unlock_irqrestore(&port->lock, flags); - } - - return NOTIFY_OK; -} - static const struct sci_irq_desc { const char *desc; irq_handler_t handler; @@ -2559,9 +2533,6 @@ static int sci_remove(struct platform_device *dev) { struct sci_port *port = platform_get_drvdata(dev); - cpufreq_unregister_notifier(&port->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); - uart_remove_one_port(&sci_uart_driver, &port->port); sci_cleanup_single(port); @@ -2714,16 +2685,6 @@ static int sci_probe(struct platform_device *dev) if (ret) return ret; - sp->freq_transition.notifier_call = sci_notifier; - - ret = cpufreq_register_notifier(&sp->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); - if (unlikely(ret < 0)) { - uart_remove_one_port(&sci_uart_driver, &sp->port); - sci_cleanup_single(sp); - return ret; - } - #ifdef CONFIG_SH_STANDARD_BIOS sh_bios_gdb_detach(); #endif diff --git a/kernel/drivers/tty/serial/sunhv.c b/kernel/drivers/tty/serial/sunhv.c index ca0d3802f..4e603d060 100644 --- a/kernel/drivers/tty/serial/sunhv.c +++ b/kernel/drivers/tty/serial/sunhv.c @@ -490,12 +490,6 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig locked = spin_trylock_irqsave(&port->lock, flags); else spin_lock_irqsave(&port->lock, flags); - if (port->sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&port->lock); - } else - spin_lock(&port->lock); for (i = 0; i < n; i++) { if (*s == '\n') diff --git a/kernel/drivers/tty/serial/ucc_uart.c b/kernel/drivers/tty/serial/ucc_uart.c index 73190f5d2..71d26c8e1 100644 --- a/kernel/drivers/tty/serial/ucc_uart.c +++ b/kernel/drivers/tty/serial/ucc_uart.c @@ -1478,6 +1478,9 @@ static const struct of_device_id ucc_uart_match[] = { .type = "serial", .compatible = "ucc_uart", }, + { + .compatible = "fsl,t1040-ucc-uart", + }, {}, }; MODULE_DEVICE_TABLE(of, ucc_uart_match); |