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authorGabe Black <gabeblack@google.com>2014-04-10 01:07:28 -0700
committerPatrick Georgi <pgeorgi@google.com>2014-11-09 13:39:11 +0100
commita6aecc41eff1fd26e6399f93f143951b4d16417b (patch)
tree6aa975b11a9b4ca0b2bd6146ed467ae015d84412 /payloads/libpayload
parentd1069e0a402d2875befdf5caed806f4afec232f7 (diff)
libpayload: serial: Move the depthcharge serial drivers into libpayload.
These drivers need to be ready right away and never really fit into the depthcharge driver model anyway. CQ-DEPEND=CL:194063 BUG=None TEST=Built and booted on nyan and peach_pit. Built for nyan_big, nyan_blaze, and daisy. BRANCH=None Original-Change-Id: I9570dee53c57d42ef4cd956f66a878ce39a2dc20 Original-Signed-off-by: Gabe Black <gabeblack@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/194057 Original-Reviewed-by: Gabe Black <gabeblack@chromium.org> Original-Commit-Queue: Gabe Black <gabeblack@chromium.org> Original-Tested-by: Gabe Black <gabeblack@chromium.org> (cherry picked from commit 26e18f680c93fc990a3d1057c164f19859634a9f) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ia2233e2bd821d8de8d2d57a9423aeb74be7efd93 Reviewed-on: http://review.coreboot.org/7224 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'payloads/libpayload')
-rw-r--r--payloads/libpayload/Config.in10
-rw-r--r--payloads/libpayload/drivers/Makefile.inc4
-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.c106
-rw-r--r--payloads/libpayload/drivers/serial/tegra.c111
5 files changed, 230 insertions, 1 deletions
diff --git a/payloads/libpayload/Config.in b/payloads/libpayload/Config.in
index 2a5048cbab..f47d105897 100644
--- a/payloads/libpayload/Config.in
+++ b/payloads/libpayload/Config.in
@@ -168,6 +168,16 @@ config 8250_SERIAL_CONSOLE
default y if ARCH_X86
default n if !ARCH_X86
+config S5P_SERIAL_CONSOLE
+ bool "Exynos SOC, S5P compatible serial port driver"
+ depends on SERIAL_CONSOLE
+ default n
+
+config TEGRA_SERIAL_CONSOLE
+ bool "Tegra SOC compatible serial port driver"
+ depends on SERIAL_CONSOLE
+ default n
+
config SERIAL_IOBASE
## This default is currently not used on non-x86 systems.
hex "Default I/O base for the serial port (default 0x3f8)"
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);
+ }
+}