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authorGraff Yang <graff.yang@gmail.com>2009-05-12 13:47:54 -0700
committerSamuel Ortiz <samuel@sortiz.org>2009-06-13 01:56:02 +0200
commitd510fe70db4c62ac899c486506fdfb7f3b518c86 (patch)
tree1906c4baa902e2b636a1049e322be5d7d27fa1aa /drivers/net/irda/bfin_sir.h
parent8981f01001c616f58f1623ecadfab8b1ed758da7 (diff)
irda: new Blackfin on-chip SIR IrDA driver
Signed-off-by: Graff Yang <graff.yang@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/net/irda/bfin_sir.h')
-rw-r--r--drivers/net/irda/bfin_sir.h148
1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/net/irda/bfin_sir.h b/drivers/net/irda/bfin_sir.h
new file mode 100644
index 00000000000..dac71b1f4f9
--- /dev/null
+++ b/drivers/net/irda/bfin_sir.h
@@ -0,0 +1,148 @@
+/*
+ * Blackfin Infra-red Driver
+ *
+ * Copyright 2006-2009 Analog Devices Inc.
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ *
+ */
+
+#include <linux/serial.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/wrapper.h>
+#include <net/irda/irda_device.h>
+
+#include <asm/irq.h>
+#include <asm/cacheflush.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#ifdef CONFIG_SIR_BFIN_DMA
+struct dma_rx_buf {
+ char *buf;
+ int head;
+ int tail;
+};
+#endif
+
+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
+ unsigned int tx_dma_channel;
+ unsigned int rx_dma_channel;
+};
+
+struct bfin_sir_port_res {
+ unsigned long base_addr;
+ int irq;
+ unsigned int rx_dma_channel;
+ unsigned int tx_dma_channel;
+};
+
+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;
+};
+
+#define DRIVER_NAME "bfin_sir"
+
+#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_DLH(port) bfin_read16((port)->membase + OFFSET_DLH)
+#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_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_BF54x
+#define SIR_UART_GET_LSR(port) bfin_read16((port)->membase + OFFSET_LSR)
+#define SIR_UART_GET_IER(port) bfin_read16((port)->membase + OFFSET_IER_SET)
+#define SIR_UART_SET_IER(port, v) bfin_write16(((port)->membase + OFFSET_IER_SET), v)
+#define SIR_UART_CLEAR_IER(port, v) bfin_write16(((port)->membase + OFFSET_IER_CLEAR), v)
+#define SIR_UART_PUT_LSR(port, v) bfin_write16(((port)->membase + OFFSET_LSR), v)
+#define SIR_UART_CLEAR_LSR(port) bfin_write16(((port)->membase + OFFSET_LSR), -1)
+
+#define SIR_UART_SET_DLAB(port)
+#define SIR_UART_CLEAR_DLAB(port)
+
+#define SIR_UART_ENABLE_INTS(port, v) SIR_UART_SET_IER(port, v)
+#define SIR_UART_DISABLE_INTS(port) SIR_UART_CLEAR_IER(port, 0xF)
+#define SIR_UART_STOP_TX(port) do { SIR_UART_PUT_LSR(port, TFI); SIR_UART_CLEAR_IER(port, ETBEI); } while (0)
+#define SIR_UART_ENABLE_TX(port) do { SIR_UART_SET_IER(port, ETBEI); } while (0)
+#define SIR_UART_STOP_RX(port) do { SIR_UART_CLEAR_IER(port, ERBFI); } while (0)
+#define SIR_UART_ENABLE_RX(port) do { SIR_UART_SET_IER(port, ERBFI); } while (0)
+#else
+
+#define SIR_UART_GET_IIR(port) bfin_read16((port)->membase + OFFSET_IIR)
+#define SIR_UART_GET_IER(port) bfin_read16((port)->membase + OFFSET_IER)
+#define SIR_UART_PUT_IER(port, v) bfin_write16(((port)->membase + OFFSET_IER), v)
+
+#define SIR_UART_SET_DLAB(port) do { SIR_UART_PUT_LCR(port, SIR_UART_GET_LCR(port) | DLAB); } while (0)
+#define SIR_UART_CLEAR_DLAB(port) do { SIR_UART_PUT_LCR(port, SIR_UART_GET_LCR(port) & ~DLAB); } while (0)
+
+#define SIR_UART_ENABLE_INTS(port, v) SIR_UART_PUT_IER(port, v)
+#define SIR_UART_DISABLE_INTS(port) SIR_UART_PUT_IER(port, 0)
+#define SIR_UART_STOP_TX(port) do { SIR_UART_PUT_IER(port, SIR_UART_GET_IER(port) & ~ETBEI); } while (0)
+#define SIR_UART_ENABLE_TX(port) do { SIR_UART_PUT_IER(port, SIR_UART_GET_IER(port) | ETBEI); } while (0)
+#define SIR_UART_STOP_RX(port) do { SIR_UART_PUT_IER(port, SIR_UART_GET_IER(port) & ~ERBFI); } while (0)
+#define SIR_UART_ENABLE_RX(port) do { SIR_UART_PUT_IER(port, SIR_UART_GET_IER(port) | ERBFI); } while (0)
+
+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);
+}
+#endif
+
+static const unsigned short per[][4] = {
+ /* rx pin tx pin NULL uart_number */
+ {P_UART0_RX, P_UART0_TX, 0, 0},
+ {P_UART1_RX, P_UART1_TX, 0, 1},
+ {P_UART2_RX, P_UART2_TX, 0, 2},
+ {P_UART3_RX, P_UART3_TX, 0, 3},
+};