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Date: Tue, 1 Nov 2011 20:03:42 +0100
From: Manuel Lauss <manuel.lauss@...glemail.com>
To: Linux-MIPS <linux-mips@...ux-mips.org>,
Ralf Baechle <ralf@...ux-mips.org>
Cc: Manuel Lauss <manuel.lauss@...glemail.com>,
Samuel Ortiz <samuel@...tiz.org>, netdev@...r.kernel.org
Subject: [PATCH 16/18] net/irda: convert au1k_ir to platform driver.
Moderate driver cleanup:
convert to platform driver, get rid of board-specific code.
Driver loads and runs on a DB1100 board. But since I have no other
IrDA hardware to exchange data with I can't say whether it really sends
and receives.
Cc: Samuel Ortiz <samuel@...tiz.org>
Cc: netdev@...r.kernel.org
Signed-off-by: Manuel Lauss <manuel.lauss@...glemail.com>
---
I'd like for this to go in via the MIPS tree since other mips patches depend
on it.
arch/mips/include/asm/mach-au1x00/au1000.h | 52 +-
drivers/net/irda/Kconfig | 6 +-
drivers/net/irda/au1000_ircc.h | 125 ---
drivers/net/irda/au1k_ir.c | 1226 +++++++++++++++------------
4 files changed, 700 insertions(+), 709 deletions(-)
delete mode 100644 drivers/net/irda/au1000_ircc.h
diff --git a/arch/mips/include/asm/mach-au1x00/au1000.h b/arch/mips/include/asm/mach-au1x00/au1000.h
index 65f1262..569828d 100644
--- a/arch/mips/include/asm/mach-au1x00/au1000.h
+++ b/arch/mips/include/asm/mach-au1x00/au1000.h
@@ -1265,44 +1265,20 @@ enum soc_au1200_ints {
#define SSI_ENABLE_CD (1 << 1)
#define SSI_ENABLE_E (1 << 0)
-/* IrDA Controller */
-#define IRDA_BASE 0xB0300000
-#define IR_RING_PTR_STATUS (IRDA_BASE + 0x00)
-#define IR_RING_BASE_ADDR_H (IRDA_BASE + 0x04)
-#define IR_RING_BASE_ADDR_L (IRDA_BASE + 0x08)
-#define IR_RING_SIZE (IRDA_BASE + 0x0C)
-#define IR_RING_PROMPT (IRDA_BASE + 0x10)
-#define IR_RING_ADDR_CMPR (IRDA_BASE + 0x14)
-#define IR_INT_CLEAR (IRDA_BASE + 0x18)
-#define IR_CONFIG_1 (IRDA_BASE + 0x20)
-# define IR_RX_INVERT_LED (1 << 0)
-# define IR_TX_INVERT_LED (1 << 1)
-# define IR_ST (1 << 2)
-# define IR_SF (1 << 3)
-# define IR_SIR (1 << 4)
-# define IR_MIR (1 << 5)
-# define IR_FIR (1 << 6)
-# define IR_16CRC (1 << 7)
-# define IR_TD (1 << 8)
-# define IR_RX_ALL (1 << 9)
-# define IR_DMA_ENABLE (1 << 10)
-# define IR_RX_ENABLE (1 << 11)
-# define IR_TX_ENABLE (1 << 12)
-# define IR_LOOPBACK (1 << 14)
-# define IR_SIR_MODE (IR_SIR | IR_DMA_ENABLE | \
- IR_RX_ALL | IR_RX_ENABLE | IR_SF | IR_16CRC)
-#define IR_SIR_FLAGS (IRDA_BASE + 0x24)
-#define IR_ENABLE (IRDA_BASE + 0x28)
-# define IR_RX_STATUS (1 << 9)
-# define IR_TX_STATUS (1 << 10)
-#define IR_READ_PHY_CONFIG (IRDA_BASE + 0x2C)
-#define IR_WRITE_PHY_CONFIG (IRDA_BASE + 0x30)
-#define IR_MAX_PKT_LEN (IRDA_BASE + 0x34)
-#define IR_RX_BYTE_CNT (IRDA_BASE + 0x38)
-#define IR_CONFIG_2 (IRDA_BASE + 0x3C)
-# define IR_MODE_INV (1 << 0)
-# define IR_ONE_PIN (1 << 1)
-#define IR_INTERFACE_CONFIG (IRDA_BASE + 0x40)
+
+/*
+ * The IrDA peripheral has an IRFIRSEL pin, but on the DB/PB boards it's not
+ * used to select FIR/SIR mode on the transceiver but as a GPIO. Instead a
+ * CPLD has to be told about the mode.
+ */
+#define AU1000_IRDA_PHY_MODE_OFF 0
+#define AU1000_IRDA_PHY_MODE_SIR 1
+#define AU1000_IRDA_PHY_MODE_FIR 2
+
+struct au1k_irda_platform_data {
+ void(*set_phy_mode)(int mode);
+};
+
/* GPIO */
#define SYS_PINFUNC 0xB190002C
diff --git a/drivers/net/irda/Kconfig b/drivers/net/irda/Kconfig
index d423d18..e535137 100644
--- a/drivers/net/irda/Kconfig
+++ b/drivers/net/irda/Kconfig
@@ -313,8 +313,12 @@ config TOSHIBA_FIR
donauboe.
config AU1000_FIR
- tristate "Alchemy Au1000 SIR/FIR"
+ tristate "Alchemy IrDA SIR/FIR"
depends on IRDA && MIPS_ALCHEMY
+ help
+ Say Y/M here to build suppor the the IrDA peripheral on the
+ Alchemy Au1000 and Au1100 SoCs.
+ Say M to build a module; it will be called au1k_ir.ko
config SMC_IRCC_FIR
tristate "SMSC IrCC (EXPERIMENTAL)"
diff --git a/drivers/net/irda/au1000_ircc.h b/drivers/net/irda/au1000_ircc.h
deleted file mode 100644
index c072c09..0000000
--- a/drivers/net/irda/au1000_ircc.h
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- *
- * BRIEF MODULE DESCRIPTION
- * Au1000 IrDA driver.
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ppopov@...sta.com or source@...sta.com
- *
- * 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 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef AU1000_IRCC_H
-#define AU1000_IRCC_H
-
-#include <linux/time.h>
-
-#include <linux/spinlock.h>
-#include <linux/pm.h>
-#include <asm/io.h>
-
-#define NUM_IR_IFF 1
-#define NUM_IR_DESC 64
-#define RING_SIZE_4 0x0
-#define RING_SIZE_16 0x3
-#define RING_SIZE_64 0xF
-#define MAX_NUM_IR_DESC 64
-#define MAX_BUF_SIZE 2048
-
-#define BPS_115200 0
-#define BPS_57600 1
-#define BPS_38400 2
-#define BPS_19200 5
-#define BPS_9600 11
-#define BPS_2400 47
-
-/* Ring descriptor flags */
-#define AU_OWN (1<<7) /* tx,rx */
-
-#define IR_DIS_CRC (1<<6) /* tx */
-#define IR_BAD_CRC (1<<5) /* tx */
-#define IR_NEED_PULSE (1<<4) /* tx */
-#define IR_FORCE_UNDER (1<<3) /* tx */
-#define IR_DISABLE_TX (1<<2) /* tx */
-#define IR_HW_UNDER (1<<0) /* tx */
-#define IR_TX_ERROR (IR_DIS_CRC|IR_BAD_CRC|IR_HW_UNDER)
-
-#define IR_PHY_ERROR (1<<6) /* rx */
-#define IR_CRC_ERROR (1<<5) /* rx */
-#define IR_MAX_LEN (1<<4) /* rx */
-#define IR_FIFO_OVER (1<<3) /* rx */
-#define IR_SIR_ERROR (1<<2) /* rx */
-#define IR_RX_ERROR (IR_PHY_ERROR|IR_CRC_ERROR| \
- IR_MAX_LEN|IR_FIFO_OVER|IR_SIR_ERROR)
-
-typedef struct db_dest {
- struct db_dest *pnext;
- volatile u32 *vaddr;
- dma_addr_t dma_addr;
-} db_dest_t;
-
-
-typedef struct ring_desc {
- u8 count_0; /* 7:0 */
- u8 count_1; /* 12:8 */
- u8 reserved;
- u8 flags;
- u8 addr_0; /* 7:0 */
- u8 addr_1; /* 15:8 */
- u8 addr_2; /* 23:16 */
- u8 addr_3; /* 31:24 */
-} ring_dest_t;
-
-
-/* Private data for each instance */
-struct au1k_private {
-
- db_dest_t *pDBfree;
- db_dest_t db[2*NUM_IR_DESC];
- volatile ring_dest_t *rx_ring[NUM_IR_DESC];
- volatile ring_dest_t *tx_ring[NUM_IR_DESC];
- db_dest_t *rx_db_inuse[NUM_IR_DESC];
- db_dest_t *tx_db_inuse[NUM_IR_DESC];
- u32 rx_head;
- u32 tx_head;
- u32 tx_tail;
- u32 tx_full;
-
- iobuff_t rx_buff;
-
- struct net_device *netdev;
-
- struct timeval stamp;
- struct timeval now;
- struct qos_info qos;
- struct irlap_cb *irlap;
-
- u8 open;
- u32 speed;
- u32 newspeed;
-
- u32 intr_work_done; /* number of Rx and Tx pkts processed in the isr */
- struct timer_list timer;
-
- spinlock_t lock; /* For serializing operations */
-};
-#endif /* AU1000_IRCC_H */
diff --git a/drivers/net/irda/au1k_ir.c b/drivers/net/irda/au1k_ir.c
index 670bb05..fc503aa 100644
--- a/drivers/net/irda/au1k_ir.c
+++ b/drivers/net/irda/au1k_ir.c
@@ -18,101 +18,220 @@
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
-#include <linux/module.h>
-#include <linux/types.h>
+
#include <linux/init.h>
-#include <linux/errno.h>
+#include <linux/module.h>
#include <linux/netdevice.h>
-#include <linux/slab.h>
-#include <linux/rtnetlink.h>
#include <linux/interrupt.h>
-#include <linux/pm.h>
-#include <linux/bitops.h>
-
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/au1000.h>
-#if defined(CONFIG_MIPS_DB1000)
-#include <asm/mach-db1x00/bcsr.h>
-#else
-#error au1k_ir: unsupported board
-#endif
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/types.h>
#include <net/irda/irda.h>
#include <net/irda/irmod.h>
#include <net/irda/wrapper.h>
#include <net/irda/irda_device.h>
-#include "au1000_ircc.h"
+#include <asm/mach-au1x00/au1000.h>
+
+/* registers */
+#define IR_RING_PTR_STATUS 0x00
+#define IR_RING_BASE_ADDR_H 0x04
+#define IR_RING_BASE_ADDR_L 0x08
+#define IR_RING_SIZE 0x0C
+#define IR_RING_PROMPT 0x10
+#define IR_RING_ADDR_CMPR 0x14
+#define IR_INT_CLEAR 0x18
+#define IR_CONFIG_1 0x20
+#define IR_SIR_FLAGS 0x24
+#define IR_STATUS 0x28
+#define IR_READ_PHY_CONFIG 0x2C
+#define IR_WRITE_PHY_CONFIG 0x30
+#define IR_MAX_PKT_LEN 0x34
+#define IR_RX_BYTE_CNT 0x38
+#define IR_CONFIG_2 0x3C
+#define IR_ENABLE 0x40
+
+/* Config1 */
+#define IR_RX_INVERT_LED (1 << 0)
+#define IR_TX_INVERT_LED (1 << 1)
+#define IR_ST (1 << 2)
+#define IR_SF (1 << 3)
+#define IR_SIR (1 << 4)
+#define IR_MIR (1 << 5)
+#define IR_FIR (1 << 6)
+#define IR_16CRC (1 << 7)
+#define IR_TD (1 << 8)
+#define IR_RX_ALL (1 << 9)
+#define IR_DMA_ENABLE (1 << 10)
+#define IR_RX_ENABLE (1 << 11)
+#define IR_TX_ENABLE (1 << 12)
+#define IR_LOOPBACK (1 << 14)
+#define IR_SIR_MODE (IR_SIR | IR_DMA_ENABLE | \
+ IR_RX_ALL | IR_RX_ENABLE | IR_SF | \
+ IR_16CRC)
+
+/* ir_status */
+#define IR_RX_STATUS (1 << 9)
+#define IR_TX_STATUS (1 << 10)
+#define IR_PHYEN (1 << 15)
+
+/* ir_write_phy_config */
+#define IR_BR(x) (((x) & 0x3f) << 10) /* baud rate */
+#define IR_PW(x) (((x) & 0x1f) << 5) /* pulse width */
+#define IR_P(x) ((x) & 0x1f) /* preamble bits */
+
+/* Config2 */
+#define IR_MODE_INV (1 << 0)
+#define IR_ONE_PIN (1 << 1)
+#define IR_PHYCLK_40MHZ (0 << 2)
+#define IR_PHYCLK_48MHZ (1 << 2)
+#define IR_PHYCLK_56MHZ (2 << 2)
+#define IR_PHYCLK_64MHZ (3 << 2)
+#define IR_DP (1 << 4)
+#define IR_DA (1 << 5)
+#define IR_FLT_HIGH (0 << 6)
+#define IR_FLT_MEDHI (1 << 6)
+#define IR_FLT_MEDLO (2 << 6)
+#define IR_FLT_LO (3 << 6)
+#define IR_IEN (1 << 8)
+
+/* ir_enable */
+#define IR_HC (1 << 3) /* divide SBUS clock by 2 */
+#define IR_CE (1 << 2) /* clock enable */
+#define IR_C (1 << 1) /* coherency bit */
+#define IR_BE (1 << 0) /* set in big endian mode */
+
+#define NUM_IR_DESC 64
+#define RING_SIZE_4 0x0
+#define RING_SIZE_16 0x3
+#define RING_SIZE_64 0xF
+#define MAX_NUM_IR_DESC 64
+#define MAX_BUF_SIZE 2048
+
+/* Ring descriptor flags */
+#define AU_OWN (1 << 7) /* tx,rx */
+#define IR_DIS_CRC (1 << 6) /* tx */
+#define IR_BAD_CRC (1 << 5) /* tx */
+#define IR_NEED_PULSE (1 << 4) /* tx */
+#define IR_FORCE_UNDER (1 << 3) /* tx */
+#define IR_DISABLE_TX (1 << 2) /* tx */
+#define IR_HW_UNDER (1 << 0) /* tx */
+#define IR_TX_ERROR (IR_DIS_CRC | IR_BAD_CRC | IR_HW_UNDER)
+
+#define IR_PHY_ERROR (1 << 6) /* rx */
+#define IR_CRC_ERROR (1 << 5) /* rx */
+#define IR_MAX_LEN (1 << 4) /* rx */
+#define IR_FIFO_OVER (1 << 3) /* rx */
+#define IR_SIR_ERROR (1 << 2) /* rx */
+#define IR_RX_ERROR (IR_PHY_ERROR | IR_CRC_ERROR | \
+ IR_MAX_LEN | IR_FIFO_OVER | IR_SIR_ERROR)
+
+struct db_dest {
+ struct db_dest *pnext;
+ volatile u32 *vaddr;
+ dma_addr_t dma_addr;
+};
+
+struct ring_dest {
+ u8 count_0; /* 7:0 */
+ u8 count_1; /* 12:8 */
+ u8 reserved;
+ u8 flags;
+ u8 addr_0; /* 7:0 */
+ u8 addr_1; /* 15:8 */
+ u8 addr_2; /* 23:16 */
+ u8 addr_3; /* 31:24 */
+};
+
+/* Private data for each instance */
+struct au1k_private {
+ void __iomem *iobase;
+ int irq_rx, irq_tx;
+
+ struct db_dest *pDBfree;
+ struct db_dest db[2 * NUM_IR_DESC];
+ volatile struct ring_dest *rx_ring[NUM_IR_DESC];
+ volatile struct ring_dest *tx_ring[NUM_IR_DESC];
+ struct db_dest *rx_db_inuse[NUM_IR_DESC];
+ struct db_dest *tx_db_inuse[NUM_IR_DESC];
+ u32 rx_head;
+ u32 tx_head;
+ u32 tx_tail;
+ u32 tx_full;
+
+ iobuff_t rx_buff;
+
+ struct net_device *netdev;
+ struct timeval stamp;
+ struct timeval now;
+ struct qos_info qos;
+ struct irlap_cb *irlap;
+
+ u8 open;
+ u32 speed;
+ u32 newspeed;
-static int au1k_irda_net_init(struct net_device *);
-static int au1k_irda_start(struct net_device *);
-static int au1k_irda_stop(struct net_device *dev);
-static int au1k_irda_hard_xmit(struct sk_buff *, struct net_device *);
-static int au1k_irda_rx(struct net_device *);
-static void au1k_irda_interrupt(int, void *);
-static void au1k_tx_timeout(struct net_device *);
-static int au1k_irda_ioctl(struct net_device *, struct ifreq *, int);
-static int au1k_irda_set_speed(struct net_device *dev, int speed);
+ struct timer_list timer;
-static void *dma_alloc(size_t, dma_addr_t *);
-static void dma_free(void *, size_t);
+ struct resource *ioarea;
+ struct au1k_irda_platform_data *platdata;
+};
static int qos_mtt_bits = 0x07; /* 1 ms or more */
-static struct net_device *ir_devs[NUM_IR_IFF];
-static char version[] __devinitdata =
- "au1k_ircc:1.2 ppopov@...sta.com\n";
#define RUN_AT(x) (jiffies + (x))
-static DEFINE_SPINLOCK(ir_lock);
+static void au1k_irda_plat_set_phy_mode(struct au1k_private *p, int mode)
+{
+ if (p->platdata && p->platdata->set_phy_mode)
+ p->platdata->set_phy_mode(mode);
+}
-/*
- * IrDA peripheral bug. You have to read the register
- * twice to get the right value.
- */
-u32 read_ir_reg(u32 addr)
-{
- readl(addr);
- return readl(addr);
+static inline unsigned long irda_read(struct au1k_private *p,
+ unsigned long ofs)
+{
+ /*
+ * IrDA peripheral bug. You have to read the register
+ * twice to get the right value.
+ */
+ (void)__raw_readl(p->iobase + ofs);
+ return __raw_readl(p->iobase + ofs);
}
+static inline void irda_write(struct au1k_private *p, unsigned long ofs,
+ unsigned long val)
+{
+ __raw_writel(val, p->iobase + ofs);
+ wmb();
+}
/*
* Buffer allocation/deallocation routines. The buffer descriptor returned
- * has the virtual and dma address of a buffer suitable for
+ * has the virtual and dma address of a buffer suitable for
* both, receive and transmit operations.
*/
-static db_dest_t *GetFreeDB(struct au1k_private *aup)
+static struct db_dest *GetFreeDB(struct au1k_private *aup)
{
- db_dest_t *pDB;
- pDB = aup->pDBfree;
-
- if (pDB) {
- aup->pDBfree = pDB->pnext;
- }
- return pDB;
-}
+ struct db_dest *db;
+ db = aup->pDBfree;
-static void ReleaseDB(struct au1k_private *aup, db_dest_t *pDB)
-{
- db_dest_t *pDBfree = aup->pDBfree;
- if (pDBfree)
- pDBfree->pnext = pDB;
- aup->pDBfree = pDB;
+ if (db)
+ aup->pDBfree = db->pnext;
+ return db;
}
-
/*
DMA memory allocation, derived from pci_alloc_consistent.
However, the Au1000 data cache is coherent (when programmed
so), therefore we return KSEG0 address, not KSEG1.
*/
-static void *dma_alloc(size_t size, dma_addr_t * dma_handle)
+static void *dma_alloc(size_t size, dma_addr_t *dma_handle)
{
void *ret;
int gfp = GFP_ATOMIC | GFP_DMA;
- ret = (void *) __get_free_pages(gfp, get_order(size));
+ ret = (void *)__get_free_pages(gfp, get_order(size));
if (ret != NULL) {
memset(ret, 0, size);
@@ -122,7 +241,6 @@ static void *dma_alloc(size_t size, dma_addr_t * dma_handle)
return ret;
}
-
static void dma_free(void *vaddr, size_t size)
{
vaddr = (void *)KSEG0ADDR(vaddr);
@@ -130,206 +248,306 @@ static void dma_free(void *vaddr, size_t size)
}
-static void
-setup_hw_rings(struct au1k_private *aup, u32 rx_base, u32 tx_base)
+static void setup_hw_rings(struct au1k_private *aup, u32 rx_base, u32 tx_base)
{
int i;
- for (i=0; i<NUM_IR_DESC; i++) {
- aup->rx_ring[i] = (volatile ring_dest_t *)
- (rx_base + sizeof(ring_dest_t)*i);
+ for (i = 0; i < NUM_IR_DESC; i++) {
+ aup->rx_ring[i] = (volatile struct ring_dest *)
+ (rx_base + sizeof(struct ring_dest) * i);
}
- for (i=0; i<NUM_IR_DESC; i++) {
- aup->tx_ring[i] = (volatile ring_dest_t *)
- (tx_base + sizeof(ring_dest_t)*i);
+ for (i = 0; i < NUM_IR_DESC; i++) {
+ aup->tx_ring[i] = (volatile struct ring_dest *)
+ (tx_base + sizeof(struct ring_dest) * i);
}
}
-static int au1k_irda_init(void)
-{
- static unsigned version_printed = 0;
- struct au1k_private *aup;
- struct net_device *dev;
- int err;
-
- if (version_printed++ == 0) printk(version);
-
- dev = alloc_irdadev(sizeof(struct au1k_private));
- if (!dev)
- return -ENOMEM;
-
- dev->irq = AU1000_IRDA_RX_INT; /* TX has its own interrupt */
- err = au1k_irda_net_init(dev);
- if (err)
- goto out;
- err = register_netdev(dev);
- if (err)
- goto out1;
- ir_devs[0] = dev;
- printk(KERN_INFO "IrDA: Registered device %s\n", dev->name);
- return 0;
-
-out1:
- aup = netdev_priv(dev);
- dma_free((void *)aup->db[0].vaddr,
- MAX_BUF_SIZE * 2*NUM_IR_DESC);
- dma_free((void *)aup->rx_ring[0],
- 2 * MAX_NUM_IR_DESC*(sizeof(ring_dest_t)));
- kfree(aup->rx_buff.head);
-out:
- free_netdev(dev);
- return err;
-}
-
static int au1k_irda_init_iobuf(iobuff_t *io, int size)
{
io->head = kmalloc(size, GFP_KERNEL);
if (io->head != NULL) {
- io->truesize = size;
- io->in_frame = FALSE;
- io->state = OUTSIDE_FRAME;
- io->data = io->head;
+ io->truesize = size;
+ io->in_frame = FALSE;
+ io->state = OUTSIDE_FRAME;
+ io->data = io->head;
}
return io->head ? 0 : -ENOMEM;
}
-static const struct net_device_ops au1k_irda_netdev_ops = {
- .ndo_open = au1k_irda_start,
- .ndo_stop = au1k_irda_stop,
- .ndo_start_xmit = au1k_irda_hard_xmit,
- .ndo_tx_timeout = au1k_tx_timeout,
- .ndo_do_ioctl = au1k_irda_ioctl,
-};
-
-static int au1k_irda_net_init(struct net_device *dev)
+/*
+ * Set the IrDA communications speed.
+ */
+static int au1k_irda_set_speed(struct net_device *dev, int speed)
{
struct au1k_private *aup = netdev_priv(dev);
- int i, retval = 0, err;
- db_dest_t *pDB, *pDBfree;
- dma_addr_t temp;
+ volatile struct ring_dest *ptxd;
+ unsigned long control;
+ int ret = 0, timeout = 10, i;
- err = au1k_irda_init_iobuf(&aup->rx_buff, 14384);
- if (err)
- goto out1;
+ if (speed == aup->speed)
+ return ret;
- dev->netdev_ops = &au1k_irda_netdev_ops;
+ /* disable PHY first */
+ au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
+ irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN);
- irda_init_max_qos_capabilies(&aup->qos);
+ /* disable RX/TX */
+ irda_write(aup, IR_CONFIG_1,
+ irda_read(aup, IR_CONFIG_1) & ~(IR_RX_ENABLE | IR_TX_ENABLE));
+ msleep(20);
+ while (irda_read(aup, IR_STATUS) & (IR_RX_STATUS | IR_TX_STATUS)) {
+ msleep(20);
+ if (!timeout--) {
+ printk(KERN_ERR "%s: rx/tx disable timeout\n",
+ dev->name);
+ break;
+ }
+ }
- /* The only value we must override it the baudrate */
- aup->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
- IR_115200|IR_576000 |(IR_4000000 << 8);
-
- aup->qos.min_turn_time.bits = qos_mtt_bits;
- irda_qos_bits_to_value(&aup->qos);
+ /* disable DMA */
+ irda_write(aup, IR_CONFIG_1,
+ irda_read(aup, IR_CONFIG_1) & ~IR_DMA_ENABLE);
+ msleep(20);
- retval = -ENOMEM;
+ /* After we disable tx/rx. the index pointers go back to zero. */
+ aup->tx_head = aup->tx_tail = aup->rx_head = 0;
+ for (i = 0; i < NUM_IR_DESC; i++) {
+ ptxd = aup->tx_ring[i];
+ ptxd->flags = 0;
+ ptxd->count_0 = 0;
+ ptxd->count_1 = 0;
+ }
- /* Tx ring follows rx ring + 512 bytes */
- /* we need a 1k aligned buffer */
- aup->rx_ring[0] = (ring_dest_t *)
- dma_alloc(2*MAX_NUM_IR_DESC*(sizeof(ring_dest_t)), &temp);
- if (!aup->rx_ring[0])
- goto out2;
+ for (i = 0; i < NUM_IR_DESC; i++) {
+ ptxd = aup->rx_ring[i];
+ ptxd->count_0 = 0;
+ ptxd->count_1 = 0;
+ ptxd->flags = AU_OWN;
+ }
- /* allocate the data buffers */
- aup->db[0].vaddr =
- (void *)dma_alloc(MAX_BUF_SIZE * 2*NUM_IR_DESC, &temp);
- if (!aup->db[0].vaddr)
- goto out3;
+ if (speed == 4000000)
+ au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_FIR);
+ else
+ au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR);
- setup_hw_rings(aup, (u32)aup->rx_ring[0], (u32)aup->rx_ring[0] + 512);
+ switch (speed) {
+ case 9600:
+ irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(11) | IR_PW(12));
+ irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
+ break;
+ case 19200:
+ irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(5) | IR_PW(12));
+ irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
+ break;
+ case 38400:
+ irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(2) | IR_PW(12));
+ irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
+ break;
+ case 57600:
+ irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(1) | IR_PW(12));
+ irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
+ break;
+ case 115200:
+ irda_write(aup, IR_WRITE_PHY_CONFIG, IR_PW(12));
+ irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
+ break;
+ case 4000000:
+ irda_write(aup, IR_WRITE_PHY_CONFIG, IR_P(15));
+ irda_write(aup, IR_CONFIG_1, IR_FIR | IR_DMA_ENABLE |
+ IR_RX_ENABLE);
+ break;
+ default:
+ printk(KERN_ERR "%s unsupported speed %x\n", dev->name, speed);
+ ret = -EINVAL;
+ break;
+ }
- pDBfree = NULL;
- pDB = aup->db;
- for (i=0; i<(2*NUM_IR_DESC); i++) {
- pDB->pnext = pDBfree;
- pDBfree = pDB;
- pDB->vaddr =
- (u32 *)((unsigned)aup->db[0].vaddr + MAX_BUF_SIZE*i);
- pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
- pDB++;
+ aup->speed = speed;
+ irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) | IR_PHYEN);
+
+ control = irda_read(aup, IR_STATUS);
+ irda_write(aup, IR_RING_PROMPT, 0);
+
+ if (control & (1 << 14)) {
+ printk(KERN_ERR "%s: configuration error\n", dev->name);
+ } else {
+ if (control & (1 << 11))
+ printk(KERN_DEBUG "%s Valid SIR config\n", dev->name);
+ if (control & (1 << 12))
+ printk(KERN_DEBUG "%s Valid MIR config\n", dev->name);
+ if (control & (1 << 13))
+ printk(KERN_DEBUG "%s Valid FIR config\n", dev->name);
+ if (control & (1 << 10))
+ printk(KERN_DEBUG "%s TX enabled\n", dev->name);
+ if (control & (1 << 9))
+ printk(KERN_DEBUG "%s RX enabled\n", dev->name);
}
- aup->pDBfree = pDBfree;
- /* attach a data buffer to each descriptor */
- for (i=0; i<NUM_IR_DESC; i++) {
- pDB = GetFreeDB(aup);
- if (!pDB) goto out;
- aup->rx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
- aup->rx_ring[i]->addr_1 = (u8)((pDB->dma_addr>>8) & 0xff);
- aup->rx_ring[i]->addr_2 = (u8)((pDB->dma_addr>>16) & 0xff);
- aup->rx_ring[i]->addr_3 = (u8)((pDB->dma_addr>>24) & 0xff);
- aup->rx_db_inuse[i] = pDB;
+ return ret;
+}
+
+static void update_rx_stats(struct net_device *dev, u32 status, u32 count)
+{
+ struct net_device_stats *ps = &dev->stats;
+
+ ps->rx_packets++;
+
+ if (status & IR_RX_ERROR) {
+ ps->rx_errors++;
+ if (status & (IR_PHY_ERROR | IR_FIFO_OVER))
+ ps->rx_missed_errors++;
+ if (status & IR_MAX_LEN)
+ ps->rx_length_errors++;
+ if (status & IR_CRC_ERROR)
+ ps->rx_crc_errors++;
+ } else
+ ps->rx_bytes += count;
+}
+
+static void update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len)
+{
+ struct net_device_stats *ps = &dev->stats;
+
+ ps->tx_packets++;
+ ps->tx_bytes += pkt_len;
+
+ if (status & IR_TX_ERROR) {
+ ps->tx_errors++;
+ ps->tx_aborted_errors++;
}
- for (i=0; i<NUM_IR_DESC; i++) {
- pDB = GetFreeDB(aup);
- if (!pDB) goto out;
- aup->tx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
- aup->tx_ring[i]->addr_1 = (u8)((pDB->dma_addr>>8) & 0xff);
- aup->tx_ring[i]->addr_2 = (u8)((pDB->dma_addr>>16) & 0xff);
- aup->tx_ring[i]->addr_3 = (u8)((pDB->dma_addr>>24) & 0xff);
- aup->tx_ring[i]->count_0 = 0;
- aup->tx_ring[i]->count_1 = 0;
- aup->tx_ring[i]->flags = 0;
- aup->tx_db_inuse[i] = pDB;
+}
+
+static void au1k_tx_ack(struct net_device *dev)
+{
+ struct au1k_private *aup = netdev_priv(dev);
+ volatile struct ring_dest *ptxd;
+
+ ptxd = aup->tx_ring[aup->tx_tail];
+ while (!(ptxd->flags & AU_OWN) && (aup->tx_tail != aup->tx_head)) {
+ update_tx_stats(dev, ptxd->flags,
+ (ptxd->count_1 << 8) | ptxd->count_0);
+ ptxd->count_0 = 0;
+ ptxd->count_1 = 0;
+ wmb();
+ aup->tx_tail = (aup->tx_tail + 1) & (NUM_IR_DESC - 1);
+ ptxd = aup->tx_ring[aup->tx_tail];
+
+ if (aup->tx_full) {
+ aup->tx_full = 0;
+ netif_wake_queue(dev);
+ }
}
-#if defined(CONFIG_MIPS_DB1000)
- /* power on */
- bcsr_mod(BCSR_RESETS, BCSR_RESETS_IRDA_MODE_MASK,
- BCSR_RESETS_IRDA_MODE_FULL);
-#endif
+ if (aup->tx_tail == aup->tx_head) {
+ if (aup->newspeed) {
+ au1k_irda_set_speed(dev, aup->newspeed);
+ aup->newspeed = 0;
+ } else {
+ irda_write(aup, IR_CONFIG_1,
+ irda_read(aup, IR_CONFIG_1) & ~IR_TX_ENABLE);
+ irda_write(aup, IR_CONFIG_1,
+ irda_read(aup, IR_CONFIG_1) | IR_RX_ENABLE);
+ irda_write(aup, IR_RING_PROMPT, 0);
+ }
+ }
+}
- return 0;
+static int au1k_irda_rx(struct net_device *dev)
+{
+ struct au1k_private *aup = netdev_priv(dev);
+ volatile struct ring_dest *prxd;
+ struct sk_buff *skb;
+ struct db_dest *pDB;
+ u32 flags, count;
-out3:
- dma_free((void *)aup->rx_ring[0],
- 2 * MAX_NUM_IR_DESC*(sizeof(ring_dest_t)));
-out2:
- kfree(aup->rx_buff.head);
-out1:
- printk(KERN_ERR "au1k_init_module failed. Returns %d\n", retval);
- return retval;
+ prxd = aup->rx_ring[aup->rx_head];
+ flags = prxd->flags;
+
+ while (!(flags & AU_OWN)) {
+ pDB = aup->rx_db_inuse[aup->rx_head];
+ count = (prxd->count_1 << 8) | prxd->count_0;
+ if (!(flags & IR_RX_ERROR)) {
+ /* good frame */
+ update_rx_stats(dev, flags, count);
+ skb = alloc_skb(count + 1, GFP_ATOMIC);
+ if (skb == NULL) {
+ dev->stats.rx_dropped++;
+ continue;
+ }
+ skb_reserve(skb, 1);
+ if (aup->speed == 4000000)
+ skb_put(skb, count);
+ else
+ skb_put(skb, count - 2);
+ skb_copy_to_linear_data(skb, (void *)pDB->vaddr,
+ count - 2);
+ skb->dev = dev;
+ skb_reset_mac_header(skb);
+ skb->protocol = htons(ETH_P_IRDA);
+ netif_rx(skb);
+ prxd->count_0 = 0;
+ prxd->count_1 = 0;
+ }
+ prxd->flags |= AU_OWN;
+ aup->rx_head = (aup->rx_head + 1) & (NUM_IR_DESC - 1);
+ irda_write(aup, IR_RING_PROMPT, 0);
+
+ /* next descriptor */
+ prxd = aup->rx_ring[aup->rx_head];
+ flags = prxd->flags;
+
+ }
+ return 0;
}
+static irqreturn_t au1k_irda_interrupt(int dummy, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct au1k_private *aup = netdev_priv(dev);
+
+ irda_write(aup, IR_INT_CLEAR, 0); /* ack irda interrupts */
+
+ au1k_irda_rx(dev);
+ au1k_tx_ack(dev);
+
+ return IRQ_HANDLED;
+}
static int au1k_init(struct net_device *dev)
{
struct au1k_private *aup = netdev_priv(dev);
+ u32 enable, ring_address;
int i;
- u32 control;
- u32 ring_address;
- /* bring the device out of reset */
- control = 0xe; /* coherent, clock enable, one half system clock */
-
+ enable = IR_HC | IR_CE | IR_C;
#ifndef CONFIG_CPU_LITTLE_ENDIAN
- control |= 1;
+ enable |= IR_BE;
#endif
aup->tx_head = 0;
aup->tx_tail = 0;
aup->rx_head = 0;
- for (i=0; i<NUM_IR_DESC; i++) {
+ for (i = 0; i < NUM_IR_DESC; i++)
aup->rx_ring[i]->flags = AU_OWN;
- }
- writel(control, IR_INTERFACE_CONFIG);
- au_sync_delay(10);
+ irda_write(aup, IR_ENABLE, enable);
+ msleep(20);
- writel(read_ir_reg(IR_ENABLE) & ~0x8000, IR_ENABLE); /* disable PHY */
- au_sync_delay(1);
+ /* disable PHY */
+ au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
+ irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN);
+ msleep(20);
- writel(MAX_BUF_SIZE, IR_MAX_PKT_LEN);
+ irda_write(aup, IR_MAX_PKT_LEN, MAX_BUF_SIZE);
ring_address = (u32)virt_to_phys((void *)aup->rx_ring[0]);
- writel(ring_address >> 26, IR_RING_BASE_ADDR_H);
- writel((ring_address >> 10) & 0xffff, IR_RING_BASE_ADDR_L);
+ irda_write(aup, IR_RING_BASE_ADDR_H, ring_address >> 26);
+ irda_write(aup, IR_RING_BASE_ADDR_L, (ring_address >> 10) & 0xffff);
- writel(RING_SIZE_64<<8 | RING_SIZE_64<<12, IR_RING_SIZE);
+ irda_write(aup, IR_RING_SIZE,
+ (RING_SIZE_64 << 8) | (RING_SIZE_64 << 12));
- writel(1<<2 | IR_ONE_PIN, IR_CONFIG_2); /* 48MHz */
- writel(0, IR_RING_ADDR_CMPR);
+ irda_write(aup, IR_CONFIG_2, IR_PHYCLK_48MHZ | IR_ONE_PIN);
+ irda_write(aup, IR_RING_ADDR_CMPR, 0);
au1k_irda_set_speed(dev, 9600);
return 0;
@@ -337,25 +555,28 @@ static int au1k_init(struct net_device *dev)
static int au1k_irda_start(struct net_device *dev)
{
- int retval;
- char hwname[32];
struct au1k_private *aup = netdev_priv(dev);
+ char hwname[32];
+ int retval;
- if ((retval = au1k_init(dev))) {
+ retval = au1k_init(dev);
+ if (retval) {
printk(KERN_ERR "%s: error in au1k_init\n", dev->name);
return retval;
}
- if ((retval = request_irq(AU1000_IRDA_TX_INT, au1k_irda_interrupt,
- 0, dev->name, dev))) {
- printk(KERN_ERR "%s: unable to get IRQ %d\n",
+ retval = request_irq(aup->irq_tx, &au1k_irda_interrupt, 0,
+ dev->name, dev);
+ if (retval) {
+ printk(KERN_ERR "%s: unable to get IRQ %d\n",
dev->name, dev->irq);
return retval;
}
- if ((retval = request_irq(AU1000_IRDA_RX_INT, au1k_irda_interrupt,
- 0, dev->name, dev))) {
- free_irq(AU1000_IRDA_TX_INT, dev);
- printk(KERN_ERR "%s: unable to get IRQ %d\n",
+ retval = request_irq(aup->irq_rx, &au1k_irda_interrupt, 0,
+ dev->name, dev);
+ if (retval) {
+ free_irq(aup->irq_tx, dev);
+ printk(KERN_ERR "%s: unable to get IRQ %d\n",
dev->name, dev->irq);
return retval;
}
@@ -365,9 +586,13 @@ static int au1k_irda_start(struct net_device *dev)
aup->irlap = irlap_open(dev, &aup->qos, hwname);
netif_start_queue(dev);
- writel(read_ir_reg(IR_CONFIG_2) | 1<<8, IR_CONFIG_2); /* int enable */
+ /* int enable */
+ irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) | IR_IEN);
- aup->timer.expires = RUN_AT((3*HZ));
+ /* power up */
+ au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR);
+
+ aup->timer.expires = RUN_AT((3 * HZ));
aup->timer.data = (unsigned long)dev;
return 0;
}
@@ -376,11 +601,12 @@ static int au1k_irda_stop(struct net_device *dev)
{
struct au1k_private *aup = netdev_priv(dev);
+ au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
+
/* disable interrupts */
- writel(read_ir_reg(IR_CONFIG_2) & ~(1<<8), IR_CONFIG_2);
- writel(0, IR_CONFIG_1);
- writel(0, IR_INTERFACE_CONFIG); /* disable clock */
- au_sync();
+ irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) & ~IR_IEN);
+ irda_write(aup, IR_CONFIG_1, 0);
+ irda_write(aup, IR_ENABLE, 0); /* disable clock */
if (aup->irlap) {
irlap_close(aup->irlap);
@@ -391,83 +617,12 @@ static int au1k_irda_stop(struct net_device *dev)
del_timer(&aup->timer);
/* disable the interrupt */
- free_irq(AU1000_IRDA_TX_INT, dev);
- free_irq(AU1000_IRDA_RX_INT, dev);
- return 0;
-}
-
-static void __exit au1k_irda_exit(void)
-{
- struct net_device *dev = ir_devs[0];
- struct au1k_private *aup = netdev_priv(dev);
-
- unregister_netdev(dev);
-
- dma_free((void *)aup->db[0].vaddr,
- MAX_BUF_SIZE * 2*NUM_IR_DESC);
- dma_free((void *)aup->rx_ring[0],
- 2 * MAX_NUM_IR_DESC*(sizeof(ring_dest_t)));
- kfree(aup->rx_buff.head);
- free_netdev(dev);
-}
-
-
-static inline void
-update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len)
-{
- struct au1k_private *aup = netdev_priv(dev);
- struct net_device_stats *ps = &aup->stats;
-
- ps->tx_packets++;
- ps->tx_bytes += pkt_len;
-
- if (status & IR_TX_ERROR) {
- ps->tx_errors++;
- ps->tx_aborted_errors++;
- }
-}
-
-
-static void au1k_tx_ack(struct net_device *dev)
-{
- struct au1k_private *aup = netdev_priv(dev);
- volatile ring_dest_t *ptxd;
-
- ptxd = aup->tx_ring[aup->tx_tail];
- while (!(ptxd->flags & AU_OWN) && (aup->tx_tail != aup->tx_head)) {
- update_tx_stats(dev, ptxd->flags,
- ptxd->count_1<<8 | ptxd->count_0);
- ptxd->count_0 = 0;
- ptxd->count_1 = 0;
- au_sync();
-
- aup->tx_tail = (aup->tx_tail + 1) & (NUM_IR_DESC - 1);
- ptxd = aup->tx_ring[aup->tx_tail];
-
- if (aup->tx_full) {
- aup->tx_full = 0;
- netif_wake_queue(dev);
- }
- }
+ free_irq(aup->irq_tx, dev);
+ free_irq(aup->irq_rx, dev);
- if (aup->tx_tail == aup->tx_head) {
- if (aup->newspeed) {
- au1k_irda_set_speed(dev, aup->newspeed);
- aup->newspeed = 0;
- }
- else {
- writel(read_ir_reg(IR_CONFIG_1) & ~IR_TX_ENABLE,
- IR_CONFIG_1);
- au_sync();
- writel(read_ir_reg(IR_CONFIG_1) | IR_RX_ENABLE,
- IR_CONFIG_1);
- writel(0, IR_RING_PROMPT);
- au_sync();
- }
- }
+ return 0;
}
-
/*
* Au1000 transmit routine.
*/
@@ -475,15 +630,12 @@ static int au1k_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct au1k_private *aup = netdev_priv(dev);
int speed = irda_get_next_speed(skb);
- volatile ring_dest_t *ptxd;
- u32 len;
-
- u32 flags;
- db_dest_t *pDB;
+ volatile struct ring_dest *ptxd;
+ struct db_dest *pDB;
+ u32 len, flags;
- if (speed != aup->speed && speed != -1) {
+ if (speed != aup->speed && speed != -1)
aup->newspeed = speed;
- }
if ((skb->len == 0) && (aup->newspeed)) {
if (aup->tx_tail == aup->tx_head) {
@@ -501,138 +653,47 @@ static int au1k_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
printk(KERN_DEBUG "%s: tx_full\n", dev->name);
netif_stop_queue(dev);
aup->tx_full = 1;
- return NETDEV_TX_BUSY;
- }
- else if (((aup->tx_head + 1) & (NUM_IR_DESC - 1)) == aup->tx_tail) {
+ return 1;
+ } else if (((aup->tx_head + 1) & (NUM_IR_DESC - 1)) == aup->tx_tail) {
printk(KERN_DEBUG "%s: tx_full\n", dev->name);
netif_stop_queue(dev);
aup->tx_full = 1;
- return NETDEV_TX_BUSY;
+ return 1;
}
pDB = aup->tx_db_inuse[aup->tx_head];
#if 0
- if (read_ir_reg(IR_RX_BYTE_CNT) != 0) {
- printk("tx warning: rx byte cnt %x\n",
- read_ir_reg(IR_RX_BYTE_CNT));
+ if (irda_read(aup, IR_RX_BYTE_CNT) != 0) {
+ printk(KERN_DEBUG "tx warning: rx byte cnt %x\n",
+ irda_read(aup, IR_RX_BYTE_CNT));
}
#endif
-
+
if (aup->speed == 4000000) {
/* FIR */
- skb_copy_from_linear_data(skb, pDB->vaddr, skb->len);
+ skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len);
ptxd->count_0 = skb->len & 0xff;
ptxd->count_1 = (skb->len >> 8) & 0xff;
-
- }
- else {
+ } else {
/* SIR */
len = async_wrap_skb(skb, (u8 *)pDB->vaddr, MAX_BUF_SIZE);
ptxd->count_0 = len & 0xff;
ptxd->count_1 = (len >> 8) & 0xff;
ptxd->flags |= IR_DIS_CRC;
- au_writel(au_readl(0xae00000c) & ~(1<<13), 0xae00000c);
}
ptxd->flags |= AU_OWN;
- au_sync();
+ wmb();
- writel(read_ir_reg(IR_CONFIG_1) | IR_TX_ENABLE, IR_CONFIG_1);
- writel(0, IR_RING_PROMPT);
- au_sync();
+ irda_write(aup, IR_CONFIG_1,
+ irda_read(aup, IR_CONFIG_1) | IR_TX_ENABLE);
+ irda_write(aup, IR_RING_PROMPT, 0);
dev_kfree_skb(skb);
aup->tx_head = (aup->tx_head + 1) & (NUM_IR_DESC - 1);
return NETDEV_TX_OK;
}
-
-static inline void
-update_rx_stats(struct net_device *dev, u32 status, u32 count)
-{
- struct au1k_private *aup = netdev_priv(dev);
- struct net_device_stats *ps = &aup->stats;
-
- ps->rx_packets++;
-
- if (status & IR_RX_ERROR) {
- ps->rx_errors++;
- if (status & (IR_PHY_ERROR|IR_FIFO_OVER))
- ps->rx_missed_errors++;
- if (status & IR_MAX_LEN)
- ps->rx_length_errors++;
- if (status & IR_CRC_ERROR)
- ps->rx_crc_errors++;
- }
- else
- ps->rx_bytes += count;
-}
-
-/*
- * Au1000 receive routine.
- */
-static int au1k_irda_rx(struct net_device *dev)
-{
- struct au1k_private *aup = netdev_priv(dev);
- struct sk_buff *skb;
- volatile ring_dest_t *prxd;
- u32 flags, count;
- db_dest_t *pDB;
-
- prxd = aup->rx_ring[aup->rx_head];
- flags = prxd->flags;
-
- while (!(flags & AU_OWN)) {
- pDB = aup->rx_db_inuse[aup->rx_head];
- count = prxd->count_1<<8 | prxd->count_0;
- if (!(flags & IR_RX_ERROR)) {
- /* good frame */
- update_rx_stats(dev, flags, count);
- skb=alloc_skb(count+1,GFP_ATOMIC);
- if (skb == NULL) {
- aup->netdev->stats.rx_dropped++;
- continue;
- }
- skb_reserve(skb, 1);
- if (aup->speed == 4000000)
- skb_put(skb, count);
- else
- skb_put(skb, count-2);
- skb_copy_to_linear_data(skb, pDB->vaddr, count - 2);
- skb->dev = dev;
- skb_reset_mac_header(skb);
- skb->protocol = htons(ETH_P_IRDA);
- netif_rx(skb);
- prxd->count_0 = 0;
- prxd->count_1 = 0;
- }
- prxd->flags |= AU_OWN;
- aup->rx_head = (aup->rx_head + 1) & (NUM_IR_DESC - 1);
- writel(0, IR_RING_PROMPT);
- au_sync();
-
- /* next descriptor */
- prxd = aup->rx_ring[aup->rx_head];
- flags = prxd->flags;
-
- }
- return 0;
-}
-
-
-static irqreturn_t au1k_irda_interrupt(int dummy, void *dev_id)
-{
- struct net_device *dev = dev_id;
-
- writel(0, IR_INT_CLEAR); /* ack irda interrupts */
-
- au1k_irda_rx(dev);
- au1k_tx_ack(dev);
-
- return IRQ_HANDLED;
-}
-
-
/*
* The Tx ring has been full longer than the watchdog timeout
* value. The transmitter must be hung?
@@ -650,142 +711,7 @@ static void au1k_tx_timeout(struct net_device *dev)
netif_wake_queue(dev);
}
-
-/*
- * Set the IrDA communications speed.
- */
-static int
-au1k_irda_set_speed(struct net_device *dev, int speed)
-{
- unsigned long flags;
- struct au1k_private *aup = netdev_priv(dev);
- u32 control;
- int ret = 0, timeout = 10, i;
- volatile ring_dest_t *ptxd;
-#if defined(CONFIG_MIPS_DB1000)
- unsigned long irda_resets;
-#endif
-
- if (speed == aup->speed)
- return ret;
-
- spin_lock_irqsave(&ir_lock, flags);
-
- /* disable PHY first */
- writel(read_ir_reg(IR_ENABLE) & ~0x8000, IR_ENABLE);
-
- /* disable RX/TX */
- writel(read_ir_reg(IR_CONFIG_1) & ~(IR_RX_ENABLE|IR_TX_ENABLE),
- IR_CONFIG_1);
- au_sync_delay(1);
- while (read_ir_reg(IR_ENABLE) & (IR_RX_STATUS | IR_TX_STATUS)) {
- mdelay(1);
- if (!timeout--) {
- printk(KERN_ERR "%s: rx/tx disable timeout\n",
- dev->name);
- break;
- }
- }
-
- /* disable DMA */
- writel(read_ir_reg(IR_CONFIG_1) & ~IR_DMA_ENABLE, IR_CONFIG_1);
- au_sync_delay(1);
-
- /*
- * After we disable tx/rx. the index pointers
- * go back to zero.
- */
- aup->tx_head = aup->tx_tail = aup->rx_head = 0;
- for (i=0; i<NUM_IR_DESC; i++) {
- ptxd = aup->tx_ring[i];
- ptxd->flags = 0;
- ptxd->count_0 = 0;
- ptxd->count_1 = 0;
- }
-
- for (i=0; i<NUM_IR_DESC; i++) {
- ptxd = aup->rx_ring[i];
- ptxd->count_0 = 0;
- ptxd->count_1 = 0;
- ptxd->flags = AU_OWN;
- }
-
- if (speed == 4000000) {
-#if defined(CONFIG_MIPS_DB1000)
- bcsr_mod(BCSR_RESETS, 0, BCSR_RESETS_FIR_SEL);
-#else /* Pb1000 and Pb1100 */
- writel(1<<13, CPLD_AUX1);
-#endif
- }
- else {
-#if defined(CONFIG_MIPS_DB1000)
- bcsr_mod(BCSR_RESETS, BCSR_RESETS_FIR_SEL, 0);
-#else /* Pb1000 and Pb1100 */
- writel(readl(CPLD_AUX1) & ~(1<<13), CPLD_AUX1);
-#endif
- }
-
- switch (speed) {
- case 9600:
- writel(11<<10 | 12<<5, IR_WRITE_PHY_CONFIG);
- writel(IR_SIR_MODE, IR_CONFIG_1);
- break;
- case 19200:
- writel(5<<10 | 12<<5, IR_WRITE_PHY_CONFIG);
- writel(IR_SIR_MODE, IR_CONFIG_1);
- break;
- case 38400:
- writel(2<<10 | 12<<5, IR_WRITE_PHY_CONFIG);
- writel(IR_SIR_MODE, IR_CONFIG_1);
- break;
- case 57600:
- writel(1<<10 | 12<<5, IR_WRITE_PHY_CONFIG);
- writel(IR_SIR_MODE, IR_CONFIG_1);
- break;
- case 115200:
- writel(12<<5, IR_WRITE_PHY_CONFIG);
- writel(IR_SIR_MODE, IR_CONFIG_1);
- break;
- case 4000000:
- writel(0xF, IR_WRITE_PHY_CONFIG);
- writel(IR_FIR|IR_DMA_ENABLE|IR_RX_ENABLE, IR_CONFIG_1);
- break;
- default:
- printk(KERN_ERR "%s unsupported speed %x\n", dev->name, speed);
- ret = -EINVAL;
- break;
- }
-
- aup->speed = speed;
- writel(read_ir_reg(IR_ENABLE) | 0x8000, IR_ENABLE);
- au_sync();
-
- control = read_ir_reg(IR_ENABLE);
- writel(0, IR_RING_PROMPT);
- au_sync();
-
- if (control & (1<<14)) {
- printk(KERN_ERR "%s: configuration error\n", dev->name);
- }
- else {
- if (control & (1<<11))
- printk(KERN_DEBUG "%s Valid SIR config\n", dev->name);
- if (control & (1<<12))
- printk(KERN_DEBUG "%s Valid MIR config\n", dev->name);
- if (control & (1<<13))
- printk(KERN_DEBUG "%s Valid FIR config\n", dev->name);
- if (control & (1<<10))
- printk(KERN_DEBUG "%s TX enabled\n", dev->name);
- if (control & (1<<9))
- printk(KERN_DEBUG "%s RX enabled\n", dev->name);
- }
-
- spin_unlock_irqrestore(&ir_lock, flags);
- return ret;
-}
-
-static int
-au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
+static int au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
{
struct if_irda_req *rq = (struct if_irda_req *)ifreq;
struct au1k_private *aup = netdev_priv(dev);
@@ -826,8 +752,218 @@ au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
return ret;
}
+static const struct net_device_ops au1k_irda_netdev_ops = {
+ .ndo_open = au1k_irda_start,
+ .ndo_stop = au1k_irda_stop,
+ .ndo_start_xmit = au1k_irda_hard_xmit,
+ .ndo_tx_timeout = au1k_tx_timeout,
+ .ndo_do_ioctl = au1k_irda_ioctl,
+};
+
+static int __devinit au1k_irda_net_init(struct net_device *dev)
+{
+ struct au1k_private *aup = netdev_priv(dev);
+ struct db_dest *pDB, *pDBfree;
+ int i, err, retval = 0;
+ dma_addr_t temp;
+
+ err = au1k_irda_init_iobuf(&aup->rx_buff, 14384);
+ if (err)
+ goto out1;
+
+ dev->netdev_ops = &au1k_irda_netdev_ops;
+
+ irda_init_max_qos_capabilies(&aup->qos);
+
+ /* The only value we must override it the baudrate */
+ aup->qos.baud_rate.bits = IR_9600 | IR_19200 | IR_38400 |
+ IR_57600 | IR_115200 | IR_576000 | (IR_4000000 << 8);
+
+ aup->qos.min_turn_time.bits = qos_mtt_bits;
+ irda_qos_bits_to_value(&aup->qos);
+
+ retval = -ENOMEM;
+
+ /* Tx ring follows rx ring + 512 bytes */
+ /* we need a 1k aligned buffer */
+ aup->rx_ring[0] = (struct ring_dest *)
+ dma_alloc(2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)),
+ &temp);
+ if (!aup->rx_ring[0])
+ goto out2;
+
+ /* allocate the data buffers */
+ aup->db[0].vaddr =
+ (void *)dma_alloc(MAX_BUF_SIZE * 2 * NUM_IR_DESC, &temp);
+ if (!aup->db[0].vaddr)
+ goto out3;
+
+ setup_hw_rings(aup, (u32)aup->rx_ring[0], (u32)aup->rx_ring[0] + 512);
+
+ pDBfree = NULL;
+ pDB = aup->db;
+ for (i = 0; i < (2 * NUM_IR_DESC); i++) {
+ pDB->pnext = pDBfree;
+ pDBfree = pDB;
+ pDB->vaddr =
+ (u32 *)((unsigned)aup->db[0].vaddr + (MAX_BUF_SIZE * i));
+ pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
+ pDB++;
+ }
+ aup->pDBfree = pDBfree;
+
+ /* attach a data buffer to each descriptor */
+ for (i = 0; i < NUM_IR_DESC; i++) {
+ pDB = GetFreeDB(aup);
+ if (!pDB)
+ goto out3;
+ aup->rx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
+ aup->rx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff);
+ aup->rx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff);
+ aup->rx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff);
+ aup->rx_db_inuse[i] = pDB;
+ }
+ for (i = 0; i < NUM_IR_DESC; i++) {
+ pDB = GetFreeDB(aup);
+ if (!pDB)
+ goto out3;
+ aup->tx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
+ aup->tx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff);
+ aup->tx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff);
+ aup->tx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff);
+ aup->tx_ring[i]->count_0 = 0;
+ aup->tx_ring[i]->count_1 = 0;
+ aup->tx_ring[i]->flags = 0;
+ aup->tx_db_inuse[i] = pDB;
+ }
+
+ return 0;
+
+out3:
+ dma_free((void *)aup->rx_ring[0],
+ 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
+out2:
+ kfree(aup->rx_buff.head);
+out1:
+ printk(KERN_ERR "au1k_irda_net_init() failed. Returns %d\n", retval);
+ return retval;
+}
+
+static int __devinit au1k_irda_probe(struct platform_device *pdev)
+{
+ struct au1k_private *aup;
+ struct net_device *dev;
+ struct resource *r;
+ int err;
+
+ dev = alloc_irdadev(sizeof(struct au1k_private));
+ if (!dev)
+ return -ENOMEM;
+
+ aup = netdev_priv(dev);
+
+ aup->platdata = pdev->dev.platform_data;
+
+ err = -EINVAL;
+ r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!r)
+ goto out;
+
+ aup->irq_tx = r->start;
+
+ r = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+ if (!r)
+ goto out;
+
+ aup->irq_rx = r->start;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r)
+ goto out;
+
+ err = -EBUSY;
+ aup->ioarea = request_mem_region(r->start, r->end - r->start + 1,
+ pdev->name);
+ if (!aup->ioarea)
+ goto out;
+
+ aup->iobase = ioremap_nocache(r->start, r->end - r->start + 1);
+ if (!aup->iobase)
+ goto out2;
+
+ dev->irq = aup->irq_rx;
+
+ err = au1k_irda_net_init(dev);
+ if (err)
+ goto out3;
+ err = register_netdev(dev);
+ if (err)
+ goto out4;
+
+ platform_set_drvdata(pdev, dev);
+
+ printk(KERN_INFO "IrDA: Registered device %s\n", dev->name);
+ return 0;
+
+out4:
+ dma_free((void *)aup->db[0].vaddr,
+ MAX_BUF_SIZE * 2 * NUM_IR_DESC);
+ dma_free((void *)aup->rx_ring[0],
+ 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
+ kfree(aup->rx_buff.head);
+out3:
+ iounmap(aup->iobase);
+out2:
+ release_resource(aup->ioarea);
+ kfree(aup->ioarea);
+out:
+ free_netdev(dev);
+ return err;
+}
+
+static int __devexit au1k_irda_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct au1k_private *aup = netdev_priv(dev);
+
+ unregister_netdev(dev);
+
+ dma_free((void *)aup->db[0].vaddr,
+ MAX_BUF_SIZE * 2 * NUM_IR_DESC);
+ dma_free((void *)aup->rx_ring[0],
+ 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
+ kfree(aup->rx_buff.head);
+
+ iounmap(aup->iobase);
+ release_resource(aup->ioarea);
+ kfree(aup->ioarea);
+
+ free_netdev(dev);
+
+ return 0;
+}
+
+static struct platform_driver au1k_irda_driver = {
+ .driver = {
+ .name = "au1000-irda",
+ .owner = THIS_MODULE,
+ },
+ .probe = au1k_irda_probe,
+ .remove = __devexit_p(au1k_irda_remove),
+};
+
+static int __init au1k_irda_load(void)
+{
+ return platform_driver_register(&au1k_irda_driver);
+}
+
+static void __exit au1k_irda_unload(void)
+{
+ return platform_driver_unregister(&au1k_irda_driver);
+}
+
MODULE_AUTHOR("Pete Popov <ppopov@...sta.com>");
MODULE_DESCRIPTION("Au1000 IrDA Device Driver");
-module_init(au1k_irda_init);
-module_exit(au1k_irda_exit);
+module_init(au1k_irda_load);
+module_exit(au1k_irda_unload);
--
1.7.7.1
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