From: p.wilczek@samsung.com (Piotr Wilczek)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 7/8] serial: add Exynos specific serial driver
Date: Wed, 11 Dec 2013 14:07:38 +0100 [thread overview]
Message-ID: <1386767259-15693-8-git-send-email-p.wilczek@samsung.com> (raw)
In-Reply-To: <1386767259-15693-1-git-send-email-p.wilczek@samsung.com>
Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
Makefile | 1 +
serial-exynos.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 85 insertions(+)
create mode 100644 serial-exynos.c
diff --git a/Makefile b/Makefile
index 6074106..78684b7 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,7 @@ include Makefile.config
CFLAGS+=-DUART_BASE=$(UART_BASE)
CFLAGS+=-DNR_BANKS=$(NR_BANKS)
+CFLAGS+=-DUART_PORT=$(UART_PORT)
BOARD_OBJ = board-$(MFG).o
UART_OBJ = serial-$(UART).o
diff --git a/serial-exynos.c b/serial-exynos.c
new file mode 100644
index 0000000..3ba4fc9
--- /dev/null
+++ b/serial-exynos.c
@@ -0,0 +1,84 @@
+#include "types.h"
+#include "register.h"
+#include "serial.h"
+
+#define EXYNOS_BASE_UART 0x13800000
+#define TX_FIFO_FULL_MASK (1 << 24)
+
+#define UART_BAUDRATE_115200 115200
+
+union br_rest {
+ unsigned short slot; /* udivslot */
+ unsigned char value; /* ufracval */
+};
+
+struct s5p_uart {
+ unsigned int ulcon;
+ unsigned int ucon;
+ unsigned int ufcon;
+ unsigned int umcon;
+ unsigned int utrstat;
+ unsigned int uerstat;
+ unsigned int ufstat;
+ unsigned int umstat;
+ unsigned char utxh;
+ unsigned char res1[3];
+ unsigned char urxh;
+ unsigned char res2[3];
+ unsigned int ubrdiv;
+ union br_rest rest;
+ unsigned char res3[0xffd0];
+};
+
+static inline struct s5p_uart *s5p_get_base_uart(int dev_index)
+{
+ u32 offset = dev_index * sizeof(struct s5p_uart);
+ return (struct s5p_uart *)(EXYNOS_BASE_UART + offset);
+}
+
+static inline int s5p_uart_divslot(void)
+{
+ return 0;
+}
+
+static int serial_err_check(const int dev_index, int op)
+{
+ struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
+ unsigned int mask;
+
+ /*
+ * UERSTAT
+ * Break Detect [3]
+ * Frame Err [2] : receive operation
+ * Parity Err [1] : receive operation
+ * Overrun Err [0] : receive operation
+ */
+ if (op)
+ mask = 0x8;
+ else
+ mask = 0xf;
+
+ return readl((unsigned int)&uart->uerstat) & mask;
+}
+
+/*
+ * Output a single byte to the serial port.
+ */
+void __putch(char c)
+{
+ const int dev_index = UART_PORT;
+
+ struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
+
+ /* wait for room in the tx FIFO */
+ while ((readl((unsigned int)&uart->ufstat) & TX_FIFO_FULL_MASK)) {
+ if (serial_err_check(dev_index, 1))
+ return;
+ }
+
+ writeb(c, (unsigned int)&uart->utxh);
+
+ /* If \n, also do \r */
+ if (c == '\n')
+ __putch('\r');
+}
--
1.7.9.5
next prev parent reply other threads:[~2013-12-11 13:07 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-11 13:07 [PATCH 0/8] Impedance matcher for Samsung boards Piotr Wilczek
2013-12-11 13:07 ` [PATCH 1/8] registers: add write u8 type Piotr Wilczek
2013-12-11 13:07 ` [PATCH 2/8] string: fix strncmp function Piotr Wilczek
2013-12-11 13:07 ` [PATCH 3/8] device tree blob must be 4-bytes alingned Piotr Wilczek
2013-12-11 13:07 ` [PATCH 4/8] Makefile: disable generating Thumb code Piotr Wilczek
2013-12-11 13:07 ` [PATCH 5/8] add memory operations Piotr Wilczek
2013-12-11 13:07 ` Piotr Wilczek [this message]
2013-12-11 13:07 ` [PATCH 8/8] board: add Samsung specific board support Piotr Wilczek
2013-12-11 13:16 ` [PATCH 0/8] Impedance matcher for Samsung boards Daniel Mack
2013-12-11 14:03 ` Piotr Wilczek
2013-12-11 14:10 ` Daniel Mack
2013-12-11 14:28 ` Tomasz Figa
2013-12-11 15:19 ` Daniel Mack
2013-12-11 15:48 ` Nicolas Pitre
2013-12-11 19:06 ` Jason Cooper
[not found] ` <1386767259-15693-7-git-send-email-p.wilczek@samsung.com>
2013-12-11 19:00 ` [PATCH 6/8] add support to supplement atags to device tree Jason Cooper
2013-12-12 12:09 ` Piotr Wilczek
2013-12-12 12:36 ` Jason Cooper
2013-12-18 12:09 ` [PATCH V2 0/8] Impedance matcher for Samsung boards Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 1/8] registers: add write u8 type Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 2/8] string: fix strncmp function Piotr Wilczek
2013-12-18 12:15 ` Russell King - ARM Linux
2013-12-18 12:23 ` Daniel Mack
2013-12-18 12:52 ` Russell King - ARM Linux
2013-12-18 16:01 ` Jason Cooper
2013-12-18 18:50 ` Jason Cooper
2013-12-18 18:56 ` Jason Cooper
2013-12-18 16:03 ` Jason Cooper
2013-12-18 16:04 ` Daniel Mack
2013-12-18 12:50 ` Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 3/8] device tree blob must be 4-bytes alingned Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 4/8] Makefile: disable generating Thumb code Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 5/8] add memory operations Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 7/8] serial: add Exynos specific serial driver Piotr Wilczek
2013-12-18 12:09 ` [PATCH V2 8/8] board: add Samsung specific board support Piotr Wilczek
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