diff options
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/Makefile.inc | 4 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/serial/8250.c (renamed from payloads/libpayload/drivers/serial.c) | 0 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/serial/s5p.c | 106 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/serial/tegra.c | 111 |
4 files changed, 220 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/Makefile.inc b/payloads/libpayload/drivers/Makefile.inc index ed8fe4106d..5ce0a79d0b 100644 --- a/payloads/libpayload/drivers/Makefile.inc +++ b/payloads/libpayload/drivers/Makefile.inc @@ -33,7 +33,9 @@ libc-$(CONFIG_LP_PCI) += pci.c libc-$(CONFIG_LP_SPEAKER) += speaker.c -libc-$(CONFIG_LP_8250_SERIAL_CONSOLE) += serial.c +libc-$(CONFIG_LP_8250_SERIAL_CONSOLE) += serial/8250.c +libc-$(CONFIG_LP_S5P_SERIAL_CONSOLE) += serial/s5p.c +libc-$(CONFIG_LP_TEGRA_SERIAL_CONSOLE) += serial/tegra.c libc-$(CONFIG_LP_PC_KEYBOARD) += keyboard.c diff --git a/payloads/libpayload/drivers/serial.c b/payloads/libpayload/drivers/serial/8250.c index a4c1b1a2ab..a4c1b1a2ab 100644 --- a/payloads/libpayload/drivers/serial.c +++ b/payloads/libpayload/drivers/serial/8250.c diff --git a/payloads/libpayload/drivers/serial/s5p.c b/payloads/libpayload/drivers/serial/s5p.c new file mode 100644 index 0000000000..1d23352ec4 --- /dev/null +++ b/payloads/libpayload/drivers/serial/s5p.c @@ -0,0 +1,106 @@ +/* + * Copyright 2013 Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <libpayload.h> +#include <stdint.h> + +struct s5p_uart +{ + uint32_t ulcon; // line control + uint32_t ucon; // control + uint32_t ufcon; // FIFO control + uint32_t umcon; // modem control + uint32_t utrstat; // Tx/Rx status + uint32_t uerstat; // Rx error status + uint32_t ufstat; // FIFO status + uint32_t umstat; // modem status + uint32_t utxh; // transmit buffer + uint32_t urxh; // receive buffer + uint32_t ubrdiv; // baud rate divisor + uint32_t ufracval; // divisor fractional value + uint32_t uintp; // interrupt pending + uint32_t uints; // interrupt source + uint32_t uintm; // interrupt mask +}; + +static struct s5p_uart *uart_regs; + +void serial_putchar(unsigned int c) +{ + const uint32_t TxFifoFullBit = (0x1 << 24); + + while (readl(&uart_regs->ufstat) & TxFifoFullBit) + {;} + + writeb(c, &uart_regs->utxh); + if (c == '\n') + serial_putchar('\r'); +} + +int serial_havechar(void) +{ + const uint32_t DataReadyMask = (0xf << 0) | (0x1 << 8); + + return (readl(&uart_regs->ufstat) & DataReadyMask) != 0; +} + +int serial_getchar(void) +{ + while (!serial_havechar()) + {;} + + return readb(&uart_regs->urxh); +} + +static struct console_output_driver s5p_serial_output = +{ + .putchar = &serial_putchar +}; + +static struct console_input_driver s5p_serial_input = +{ + .havekey = &serial_havechar, + .getchar = &serial_getchar +}; + +void serial_init(void) +{ + if (!lib_sysinfo.serial || !lib_sysinfo.serial->baseaddr) + return; + + uart_regs = (struct s5p_uart *)lib_sysinfo.serial->baseaddr; +} + +void serial_console_init(void) +{ + serial_init(); + + if (uart_regs) { + console_add_output_driver(&s5p_serial_output); + console_add_input_driver(&s5p_serial_input); + } +} diff --git a/payloads/libpayload/drivers/serial/tegra.c b/payloads/libpayload/drivers/serial/tegra.c new file mode 100644 index 0000000000..bcf7b1925d --- /dev/null +++ b/payloads/libpayload/drivers/serial/tegra.c @@ -0,0 +1,111 @@ +/* + * Copyright 2013 Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <libpayload.h> +#include <stdint.h> + +struct tegra_uart { + union { + uint32_t thr; // Transmit holding register. + uint32_t rbr; // Receive buffer register. + uint32_t dll; // Divisor latch lsb. + }; + union { + uint32_t ier; // Interrupt enable register. + uint32_t dlm; // Divisor latch msb. + }; + union { + uint32_t iir; // Interrupt identification register. + uint32_t fcr; // FIFO control register. + }; + uint32_t lcr; // Line control register. + uint32_t mcr; // Modem control register. + uint32_t lsr; // Line status register. + uint32_t msr; // Modem status register. +} __attribute__ ((packed)); + +enum { + TEGRA_UART_LSR_DR = 0x1 << 0, // Data ready. + TEGRA_UART_LSR_OE = 0x1 << 1, // Overrun. + TEGRA_UART_LSR_PE = 0x1 << 2, // Parity error. + TEGRA_UART_LSR_FE = 0x1 << 3, // Framing error. + TEGRA_UART_LSR_BI = 0x1 << 4, // Break. + TEGRA_UART_LSR_THRE = 0x1 << 5, // Xmit holding register empty. + TEGRA_UART_LSR_TEMT = 0x1 << 6, // Xmitter empty. + TEGRA_UART_LSR_ERR = 0x1 << 7 // Error. +}; + +static struct tegra_uart *uart_regs; + +void serial_putchar(unsigned int c) +{ + while (!(readb(&uart_regs->lsr) & TEGRA_UART_LSR_THRE)); + writeb(c, &uart_regs->thr); +} + +int serial_havechar(void) +{ + uint8_t lsr = readb(&uart_regs->lsr); + return (lsr & TEGRA_UART_LSR_DR) == TEGRA_UART_LSR_DR; +} + +int serial_getchar(void) +{ + while (!serial_havechar()) + {;} + + return readb(&uart_regs->rbr); +} + +static struct console_output_driver tegra_serial_output = +{ + .putchar = &serial_putchar +}; + +static struct console_input_driver tegra_serial_input = +{ + .havekey = &serial_havechar, + .getchar = &serial_getchar +}; + +void serial_init(void) +{ + if (!lib_sysinfo.serial || !lib_sysinfo.serial->baseaddr) + return; + + uart_regs = (struct tegra_uart *)lib_sysinfo.serial->baseaddr; +} + +void serial_console_init(void) +{ + serial_init(); + + if (uart_regs) { + console_add_output_driver(&tegra_serial_output); + console_add_input_driver(&tegra_serial_input); + } +} |