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can: ti hecc module : add platform specific initialization callback.

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CAN module on AM3517 requires programming of IO expander as part
of init sequence - to enable CAN PHY. Added platform specific
callback to handle phy control(switch on /off).

Signed-off-by: Sriramakrishnan <srk@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sriramakrishnan 2010-02-26 05:22:03 -08:00 committed by David S. Miller
parent 738b0343e7
commit 773c3e75d1
2 changed files with 22 additions and 3 deletions
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17
drivers/net/can/ti_hecc.c
View File

@ -28,9 +28,11 @@
* .mbx_offset = 0x2000, * .mbx_offset = 0x2000,
* .int_line = 0, * .int_line = 0,
* .revision = 1, * .revision = 1,
* .transceiver_switch = hecc_phy_control,
* }; * };
* *
* Please see include/can/platform/ti_hecc.h for description of above fields * Please see include/linux/can/platform/ti_hecc.h for description of
* above fields.
* *
*/ */
@ -220,6 +222,7 @@ struct ti_hecc_priv {
u32 tx_head; u32 tx_head;
u32 tx_tail; u32 tx_tail;
u32 rx_next; u32 rx_next;
void (*transceiver_switch)(int);
}; };
static inline int get_tx_head_mb(struct ti_hecc_priv *priv) static inline int get_tx_head_mb(struct ti_hecc_priv *priv)
@ -317,6 +320,13 @@ static int ti_hecc_set_btc(struct ti_hecc_priv *priv)
return 0; return 0;
} }
static void ti_hecc_transceiver_switch(const struct ti_hecc_priv *priv,
int on)
{
if (priv->transceiver_switch)
priv->transceiver_switch(on);
}
static void ti_hecc_reset(struct net_device *ndev) static void ti_hecc_reset(struct net_device *ndev)
{ {
u32 cnt; u32 cnt;
@ -818,10 +828,13 @@ static int ti_hecc_open(struct net_device *ndev)
return err; return err;
} }
ti_hecc_transceiver_switch(priv, 1);
/* Open common can device */ /* Open common can device */
err = open_candev(ndev); err = open_candev(ndev);
if (err) { if (err) {
dev_err(ndev->dev.parent, "open_candev() failed %d\n", err); dev_err(ndev->dev.parent, "open_candev() failed %d\n", err);
ti_hecc_transceiver_switch(priv, 0);
free_irq(ndev->irq, ndev); free_irq(ndev->irq, ndev);
return err; return err;
} }
@ -842,6 +855,7 @@ static int ti_hecc_close(struct net_device *ndev)
ti_hecc_stop(ndev); ti_hecc_stop(ndev);
free_irq(ndev->irq, ndev); free_irq(ndev->irq, ndev);
close_candev(ndev); close_candev(ndev);
ti_hecc_transceiver_switch(priv, 0);
return 0; return 0;
} }
@ -903,6 +917,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
priv->hecc_ram_offset = pdata->hecc_ram_offset; priv->hecc_ram_offset = pdata->hecc_ram_offset;
priv->mbx_offset = pdata->mbx_offset; priv->mbx_offset = pdata->mbx_offset;
priv->int_line = pdata->int_line; priv->int_line = pdata->int_line;
priv->transceiver_switch = pdata->transceiver_switch;
priv->can.bittiming_const = &ti_hecc_bittiming_const; priv->can.bittiming_const = &ti_hecc_bittiming_const;
priv->can.do_set_mode = ti_hecc_do_set_mode; priv->can.do_set_mode = ti_hecc_do_set_mode;

8
include/linux/can/platform/ti_hecc.h
View File

@ -1,3 +1,6 @@
#ifndef __CAN_PLATFORM_TI_HECC_H__
#define __CAN_PLATFORM_TI_HECC_H__
/* /*
* TI HECC (High End CAN Controller) driver platform header * TI HECC (High End CAN Controller) driver platform header
* *
@ -23,6 +26,7 @@
* @mbx_offset: Mailbox RAM offset * @mbx_offset: Mailbox RAM offset
* @int_line: Interrupt line to use - 0 or 1 * @int_line: Interrupt line to use - 0 or 1
* @version: version for future use * @version: version for future use
* @transceiver_switch: platform specific callback fn for transceiver control
* *
* Platform data structure to get all platform specific settings. * Platform data structure to get all platform specific settings.
* this structure also accounts the fact that the IP may have different * this structure also accounts the fact that the IP may have different
@ -35,6 +39,6 @@ struct ti_hecc_platform_data {
u32 mbx_offset; u32 mbx_offset;
u32 int_line; u32 int_line;
u32 version; u32 version;
void (*transceiver_switch) (int);
}; };
#endif