[Blackfin] arch: add Blackfin on-chip SIR IrDA driver support

[linux-2.6-omap-h63xx.git] / include / asm-blackfin / mach-bf527 / bfin_sir.h

diff --git a/include/asm-blackfin/mach-bf527/bfin_sir.h b/include/asm-blackfin/mach-bf527/bfin_sir.h
new file mode 100644 (file)
index 0000000..0612d0c
--- /dev/null
+++ b/include/asm-blackfin/mach-bf527/bfin_sir.h
@@ -0,0 +1,133 @@
+/*
+ * Blackfin Infra-red Driver
+ *
+ * Copyright 2006-2008 Analog Devices Inc.
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ *
+ */
+
+#include <linux/serial.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#define SIR_UART_GET_CHAR(port)   bfin_read16((port)->membase + OFFSET_RBR)
+#define SIR_UART_GET_DLL(port)    bfin_read16((port)->membase + OFFSET_DLL)
+#define SIR_UART_GET_IER(port)    bfin_read16((port)->membase + OFFSET_IER)
+#define SIR_UART_GET_DLH(port)    bfin_read16((port)->membase + OFFSET_DLH)
+#define SIR_UART_GET_IIR(port)    bfin_read16((port)->membase + OFFSET_IIR)
+#define SIR_UART_GET_LCR(port)    bfin_read16((port)->membase + OFFSET_LCR)
+#define SIR_UART_GET_GCTL(port)   bfin_read16((port)->membase + OFFSET_GCTL)
+
+#define SIR_UART_PUT_CHAR(port, v) bfin_write16(((port)->membase + OFFSET_THR), v)
+#define SIR_UART_PUT_DLL(port, v)  bfin_write16(((port)->membase + OFFSET_DLL), v)
+#define SIR_UART_PUT_IER(port, v)  bfin_write16(((port)->membase + OFFSET_IER), v)
+#define SIR_UART_PUT_DLH(port, v)  bfin_write16(((port)->membase + OFFSET_DLH), v)
+#define SIR_UART_PUT_LCR(port, v)  bfin_write16(((port)->membase + OFFSET_LCR), v)
+#define SIR_UART_PUT_GCTL(port, v) bfin_write16(((port)->membase + OFFSET_GCTL), v)
+
+#ifdef CONFIG_SIR_BFIN_DMA
+struct dma_rx_buf {
+       char *buf;
+       int head;
+       int tail;
+       };
+#endif /* CONFIG_SIR_BFIN_DMA */
+
+struct bfin_sir_port {
+       unsigned char __iomem   *membase;
+       unsigned int            irq;
+       unsigned int            lsr;
+       unsigned long           clk;
+       struct net_device       *dev;
+#ifdef CONFIG_SIR_BFIN_DMA
+       int                     tx_done;
+       struct dma_rx_buf       rx_dma_buf;
+       struct timer_list       rx_dma_timer;
+       int                     rx_dma_nrows;
+#endif /* CONFIG_SIR_BFIN_DMA */
+       unsigned int            tx_dma_channel;
+       unsigned int            rx_dma_channel;
+};
+
+struct bfin_sir_port sir_ports[BFIN_UART_NR_PORTS];
+
+struct bfin_sir_port_res {
+       unsigned long   base_addr;
+       int             irq;
+       unsigned int    rx_dma_channel;
+       unsigned int    tx_dma_channel;
+};
+
+struct bfin_sir_port_res bfin_sir_port_resource[] = {
+#ifdef CONFIG_BFIN_SIR0
+       {
+       0xFFC00400,
+       IRQ_UART0_RX,
+       CH_UART0_RX,
+       CH_UART0_TX,
+       },
+#endif
+#ifdef CONFIG_BFIN_SIR1
+       {
+       0xFFC02000,
+       IRQ_UART1_RX,
+       CH_UART1_RX,
+       CH_UART1_TX,
+       },
+#endif
+};
+
+int nr_sirs = ARRAY_SIZE(bfin_sir_port_resource);
+
+struct bfin_sir_self {
+       struct bfin_sir_port    *sir_port;
+       spinlock_t              lock;
+       unsigned int            open;
+       int                     speed;
+       int                     newspeed;
+
+       struct sk_buff          *txskb;
+       struct sk_buff          *rxskb;
+       struct net_device_stats stats;
+       struct device           *dev;
+       struct irlap_cb         *irlap;
+       struct qos_info         qos;
+
+       iobuff_t                tx_buff;
+       iobuff_t                rx_buff;
+
+       struct work_struct      work;
+       int                     mtt;
+};
+
+static inline unsigned int SIR_UART_GET_LSR(struct bfin_sir_port *port)
+{
+       unsigned int lsr = bfin_read16(port->membase + OFFSET_LSR);
+       port->lsr |= (lsr & (BI|FE|PE|OE));
+       return lsr | port->lsr;
+}
+
+static inline void SIR_UART_CLEAR_LSR(struct bfin_sir_port *port)
+{
+       port->lsr = 0;
+       bfin_read16(port->membase + OFFSET_LSR);
+}
+
+#define DRIVER_NAME "bfin_sir"
+
+static void bfin_sir_hw_init(void)
+{
+#ifdef CONFIG_BFIN_SIR0
+       peripheral_request(P_UART0_TX, DRIVER_NAME);
+       peripheral_request(P_UART0_RX, DRIVER_NAME);
+#endif
+
+#ifdef CONFIG_BFIN_SIR1
+       peripheral_request(P_UART1_TX, DRIVER_NAME);
+       peripheral_request(P_UART1_RX, DRIVER_NAME);
+#endif
+       SSYNC();
+}