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authorBryan Wu <cooloney@kernel.org>2008-08-27 10:51:02 +0800
committerBryan Wu <cooloney@kernel.org>2008-08-27 10:51:02 +0800
commit639f6571458948b5112be2cf00c0c2c04db2897d (patch)
treea4dd7af33d0e92c935ba1e904f6fb7e923ac825e /arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
parent3d9b7a5ce534f3963afcf8f4777267e5899fe007 (diff)
downloadlinux-2.6.38-lt-ux500-639f6571458948b5112be2cf00c0c2c04db2897d.tar.gz
Blackfin arch: move include/asm-blackfin header files to arch/blackfin
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h')
-rw-r--r--arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h195
1 files changed, 195 insertions, 0 deletions
diff --git a/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h b/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
new file mode 100644
index 00000000000..1bf56ffa22f
--- /dev/null
+++ b/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
@@ -0,0 +1,195 @@
+/*
+ * file: include/asm-blackfin/mach-bf537/bfin_serial_5xx.h
+ * based on:
+ * author:
+ *
+ * created:
+ * description:
+ * blackfin serial driver header files
+ * rev:
+ *
+ * modified:
+ *
+ *
+ * bugs: enter bugs at http://blackfin.uclinux.org/
+ *
+ * this program is free software; you can redistribute it and/or modify
+ * it under the terms of the gnu general public license as published by
+ * the free software foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * this program is distributed in the hope that it will be useful,
+ * but without any warranty; without even the implied warranty of
+ * merchantability or fitness for a particular purpose. see the
+ * gnu general public license for more details.
+ *
+ * you should have received a copy of the gnu general public license
+ * along with this program; see the file copying.
+ * if not, write to the free software foundation,
+ * 59 temple place - suite 330, boston, ma 02111-1307, usa.
+ */
+
+#include <linux/serial.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#define UART_GET_CHAR(uart) bfin_read16(((uart)->port.membase + OFFSET_RBR))
+#define UART_GET_DLL(uart) bfin_read16(((uart)->port.membase + OFFSET_DLL))
+#define UART_GET_IER(uart) bfin_read16(((uart)->port.membase + OFFSET_IER))
+#define UART_GET_DLH(uart) bfin_read16(((uart)->port.membase + OFFSET_DLH))
+#define UART_GET_IIR(uart) bfin_read16(((uart)->port.membase + OFFSET_IIR))
+#define UART_GET_LCR(uart) bfin_read16(((uart)->port.membase + OFFSET_LCR))
+#define UART_GET_GCTL(uart) bfin_read16(((uart)->port.membase + OFFSET_GCTL))
+
+#define UART_PUT_CHAR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_THR),v)
+#define UART_PUT_DLL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
+#define UART_PUT_IER(uart,v) bfin_write16(((uart)->port.membase + OFFSET_IER),v)
+#define UART_SET_IER(uart,v) UART_PUT_IER(uart, UART_GET_IER(uart) | (v))
+#define UART_CLEAR_IER(uart,v) UART_PUT_IER(uart, UART_GET_IER(uart) & ~(v))
+#define UART_PUT_DLH(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
+#define UART_PUT_LCR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
+#define UART_PUT_GCTL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
+
+#define UART_SET_DLAB(uart) do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)
+#define UART_CLEAR_DLAB(uart) do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)
+
+#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)
+#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)
+#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)
+#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)
+#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
+
+#if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
+# define CONFIG_SERIAL_BFIN_CTSRTS
+
+# ifndef CONFIG_UART0_CTS_PIN
+# define CONFIG_UART0_CTS_PIN -1
+# endif
+
+# ifndef CONFIG_UART0_RTS_PIN
+# define CONFIG_UART0_RTS_PIN -1
+# endif
+
+# ifndef CONFIG_UART1_CTS_PIN
+# define CONFIG_UART1_CTS_PIN -1
+# endif
+
+# ifndef CONFIG_UART1_RTS_PIN
+# define CONFIG_UART1_RTS_PIN -1
+# endif
+#endif
+/*
+ * The pin configuration is different from schematic
+ */
+struct bfin_serial_port {
+ struct uart_port port;
+ unsigned int old_status;
+ unsigned int lsr;
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ int tx_done;
+ int tx_count;
+ struct circ_buf rx_dma_buf;
+ struct timer_list rx_dma_timer;
+ int rx_dma_nrows;
+ unsigned int tx_dma_channel;
+ unsigned int rx_dma_channel;
+ struct work_struct tx_dma_workqueue;
+#endif
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ struct timer_list cts_timer;
+ int cts_pin;
+ int rts_pin;
+#endif
+};
+
+/* The hardware clears the LSR bits upon read, so we need to cache
+ * some of the more fun bits in software so they don't get lost
+ * when checking the LSR in other code paths (TX).
+ */
+static inline unsigned int UART_GET_LSR(struct bfin_serial_port *uart)
+{
+ unsigned int lsr = bfin_read16(uart->port.membase + OFFSET_LSR);
+ uart->lsr |= (lsr & (BI|FE|PE|OE));
+ return lsr | uart->lsr;
+}
+
+static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart)
+{
+ uart->lsr = 0;
+ bfin_write16(uart->port.membase + OFFSET_LSR, -1);
+}
+
+struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
+struct bfin_serial_res {
+ unsigned long uart_base_addr;
+ int uart_irq;
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ unsigned int uart_tx_dma_channel;
+ unsigned int uart_rx_dma_channel;
+#endif
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ int uart_cts_pin;
+ int uart_rts_pin;
+#endif
+};
+
+struct bfin_serial_res bfin_serial_resource[] = {
+#ifdef CONFIG_SERIAL_BFIN_UART0
+ {
+ 0xFFC00400,
+ IRQ_UART0_RX,
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ CH_UART0_TX,
+ CH_UART0_RX,
+#endif
+#ifdef CONFIG_BFIN_UART0_CTSRTS
+ CONFIG_UART0_CTS_PIN,
+ CONFIG_UART0_RTS_PIN,
+#endif
+ },
+#endif
+#ifdef CONFIG_SERIAL_BFIN_UART1
+ {
+ 0xFFC02000,
+ IRQ_UART1_RX,
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ CH_UART1_TX,
+ CH_UART1_RX,
+#endif
+#ifdef CONFIG_BFIN_UART1_CTSRTS
+ CONFIG_UART1_CTS_PIN,
+ CONFIG_UART1_RTS_PIN,
+#endif
+ },
+#endif
+};
+
+int nr_ports = ARRAY_SIZE(bfin_serial_resource);
+
+#define DRIVER_NAME "bfin-uart"
+
+static void bfin_serial_hw_init(struct bfin_serial_port *uart)
+{
+
+#ifdef CONFIG_SERIAL_BFIN_UART0
+ peripheral_request(P_UART0_TX, DRIVER_NAME);
+ peripheral_request(P_UART0_RX, DRIVER_NAME);
+#endif
+
+#ifdef CONFIG_SERIAL_BFIN_UART1
+ peripheral_request(P_UART1_TX, DRIVER_NAME);
+ peripheral_request(P_UART1_RX, DRIVER_NAME);
+#endif
+
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ if (uart->cts_pin >= 0) {
+ gpio_request(uart->cts_pin, DRIVER_NAME);
+ gpio_direction_input(uart->cts_pin);
+ }
+
+ if (uart->rts_pin >= 0) {
+ gpio_request(uart->rts_pin, DRIVER_NAME);
+ gpio_direction_output(uart->rts_pin, 0);
+ }
+#endif
+}