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 000000000000..1bf56ffa22f9
--- /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
+}