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Commit 82e38177 authored by Matthias Fuchs's avatar Matthias Fuchs Committed by David S. Miller
Browse files

can: Add esd board support to plx_pci CAN driver 



This patch adds support for SJA1000 based PCI CAN interface cards
from electronic system design gmbh.

Some changes have been done on the common code:
 - esd boards must not have the 2nd local interupt enabled (PLX9030/9050)
 - a new path for PLX9056/PEX8311 chips has been added
 - new plx9056 reset function has been implemented
 - struct plx_card_info got a reset function entry

In detail the following additional boards are now supported:

        CAN-PCI/200 (PCI)
        CAN-PCI/266 (PCI)
        CAN-PMC266 (PMC module)
        CAN-PCIe/2000 (PCI Express)
        CAN-CPCI/200 (Compact PCI, 3U)
        CAN-PCI104 (PCI104)

Signed-off-by: default avatarMatthias Fuchs <matthias.fuchs@esd.eu>
Acked-by: default avatarWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2e8e18ef

drivers/net/can/sja1000/Kconfig

+3 −1
Original line number Diff line number Diff line
@@ -53,7 +53,9 @@ config CAN_PLX_PCI 
	  Driver supports now:

	   - Adlink PCI-7841/cPCI-7841 card (http://www.adlinktech.com/)

	   - Adlink PCI-7841/cPCI-7841 SE card

	   - esd CAN-PCI/CPCI/PCI104/200 (http://www.esd.eu/)

	   - esd CAN-PCI/PMC/266

	   - esd CAN-PCIe/2000

	   - Marathon CAN-bus-PCI card (http://www.marathon.ru/)

	   - TEWS TECHNOLOGIES TPMC810 card (http://www.tews.com/)



endif

drivers/net/can/sja1000/plx_pci.c

+142 −11
Original line number Diff line number Diff line
@@ -41,7 +41,10 @@ MODULE_DESCRIPTION("Socket-CAN driver for PLX90xx PCI-bridge cards with " 
MODULE_SUPPORTED_DEVICE("Adlink PCI-7841/cPCI-7841, "

			"Adlink PCI-7841/cPCI-7841 SE, "

			"Marathon CAN-bus-PCI, "

			"TEWS TECHNOLOGIES TPMC810");

			"TEWS TECHNOLOGIES TPMC810, "

			"esd CAN-PCI/CPCI/PCI104/200, "

			"esd CAN-PCI/PMC/266, "

			"esd CAN-PCIe/2000")

MODULE_LICENSE("GPL v2");



#define PLX_PCI_MAX_CHAN 2
@@ -50,11 +53,14 @@ struct plx_pci_card { 
	int channels;			/* detected channels count */

	struct net_device *net_dev[PLX_PCI_MAX_CHAN];

	void __iomem *conf_addr;



	/* Pointer to device-dependent reset function */

	void (*reset_func)(struct pci_dev *pdev);

};



#define PLX_PCI_CAN_CLOCK (16000000 / 2)



/* PLX90xx registers */

/* PLX9030/9050/9052 registers */

#define PLX_INTCSR	0x4c		/* Interrupt Control/Status */

#define PLX_CNTRL	0x50		/* User I/O, Direct Slave Response,

					 * Serial EEPROM, and Initialization
@@ -66,6 +72,14 @@ struct plx_pci_card { 
#define PLX_PCI_INT_EN	(1 << 6)	/* PCI Interrupt Enable */

#define PLX_PCI_RESET	(1 << 30)	/* PCI Adapter Software Reset */



/* PLX9056 registers */

#define PLX9056_INTCSR	0x68		/* Interrupt Control/Status */

#define PLX9056_CNTRL	0x6c		/* Control / Software Reset */



#define PLX9056_LINTI	(1 << 11)

#define PLX9056_PCI_INT_EN (1 << 8)

#define PLX9056_PCI_RCR	(1 << 29)	/* Read Configuration Registers */



/*

 * The board configuration is probably following:

 * RX1 is connected to ground.
@@ -101,6 +115,13 @@ struct plx_pci_card { 
#define ADLINK_PCI_VENDOR_ID		0x144A

#define ADLINK_PCI_DEVICE_ID		0x7841



#define ESD_PCI_SUB_SYS_ID_PCI200	0x0004

#define ESD_PCI_SUB_SYS_ID_PCI266	0x0009

#define ESD_PCI_SUB_SYS_ID_PMC266	0x000e

#define ESD_PCI_SUB_SYS_ID_CPCI200	0x010b

#define ESD_PCI_SUB_SYS_ID_PCIE2000	0x0200

#define ESD_PCI_SUB_SYS_ID_PCI104200	0x0501



#define MARATHON_PCI_DEVICE_ID		0x2715



#define TEWS_PCI_VENDOR_ID		0x1498
@@ -108,6 +129,7 @@ struct plx_pci_card { 


static void plx_pci_reset_common(struct pci_dev *pdev);

static void plx_pci_reset_marathon(struct pci_dev *pdev);

static void plx9056_pci_reset_common(struct pci_dev *pdev);



struct plx_pci_channel_map {

	u32 bar;
@@ -148,6 +170,30 @@ static struct plx_pci_card_info plx_pci_card_info_adlink_se __devinitdata = { 
	/* based on PLX9052 */

};



static struct plx_pci_card_info plx_pci_card_info_esd200 __devinitdata = {

	"esd CAN-PCI/CPCI/PCI104/200", 2,

	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,

	{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },

	&plx_pci_reset_common

	/* based on PLX9030/9050 */

};



static struct plx_pci_card_info plx_pci_card_info_esd266 __devinitdata = {

	"esd CAN-PCI/PMC/266", 2,

	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,

	{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },

	&plx9056_pci_reset_common

	/* based on PLX9056 */

};



static struct plx_pci_card_info plx_pci_card_info_esd2000 __devinitdata = {

	"esd CAN-PCIe/2000", 2,

	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,

	{0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x100, 0x80} },

	&plx9056_pci_reset_common

	/* based on PEX8311 */

};



static struct plx_pci_card_info plx_pci_card_info_marathon __devinitdata = {

	"Marathon CAN-bus-PCI", 2,

	PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
@@ -179,6 +225,48 @@ static DEFINE_PCI_DEVICE_TABLE(plx_pci_tbl) = { 
		PCI_CLASS_COMMUNICATION_OTHER << 8, ~0,

		(kernel_ulong_t)&plx_pci_card_info_adlink_se

	},

	{

		/* esd CAN-PCI/200 */

		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,

		PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI200,

		0, 0,

		(kernel_ulong_t)&plx_pci_card_info_esd200

	},

	{

		/* esd CAN-CPCI/200 */

		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,

		PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_CPCI200,

		0, 0,

		(kernel_ulong_t)&plx_pci_card_info_esd200

	},

	{

		/* esd CAN-PCI104/200 */

		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,

		PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI104200,

		0, 0,

		(kernel_ulong_t)&plx_pci_card_info_esd200

	},

	{

		/* esd CAN-PCI/266 */

		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,

		PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI266,

		0, 0,

		(kernel_ulong_t)&plx_pci_card_info_esd266

	},

	{

		/* esd CAN-PMC/266 */

		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,

		PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PMC266,

		0, 0,

		(kernel_ulong_t)&plx_pci_card_info_esd266

	},

	{

		/* esd CAN-PCIE/2000 */

		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9056,

		PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCIE2000,

		0, 0,

		(kernel_ulong_t)&plx_pci_card_info_esd2000

	},

	{

		/* Marathon CAN-bus-PCI card */

		PCI_VENDOR_ID_PLX, MARATHON_PCI_DEVICE_ID,
@@ -242,7 +330,7 @@ static inline int plx_pci_check_sja1000(const struct sja1000_priv *priv) 
}



/*

 * PLX90xx software reset

 * PLX9030/50/52 software reset

 * Also LRESET# asserts and brings to reset device on the Local Bus (if wired).

 * For most cards it's enough for reset the SJA1000 chips.

 */
@@ -259,6 +347,38 @@ static void plx_pci_reset_common(struct pci_dev *pdev) 
	iowrite32(cntrl, card->conf_addr + PLX_CNTRL);

};



/*

 * PLX9056 software reset

 * Assert LRESET# and reset device(s) on the Local Bus (if wired).

 */

static void plx9056_pci_reset_common(struct pci_dev *pdev)

{

	struct plx_pci_card *card = pci_get_drvdata(pdev);

	u32 cntrl;



	/* issue a local bus reset */

	cntrl = ioread32(card->conf_addr + PLX9056_CNTRL);

	cntrl |= PLX_PCI_RESET;

	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);

	udelay(100);

	cntrl ^= PLX_PCI_RESET;

	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);



	/* reload local configuration from EEPROM */

	cntrl |= PLX9056_PCI_RCR;

	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);



	/*

	 * There is no safe way to poll for the end

	 * of reconfiguration process. Waiting for 10ms

	 * is safe.

	 */

	mdelay(10);



	cntrl ^= PLX9056_PCI_RCR;

	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);

};



/* Special reset function for Marathon card */

static void plx_pci_reset_marathon(struct pci_dev *pdev)

{
@@ -302,13 +422,16 @@ static void plx_pci_del_card(struct pci_dev *pdev) 
		free_sja1000dev(dev);

	}



	plx_pci_reset_common(pdev);

	card->reset_func(pdev);



	/*

	 * Disable interrupts from PCI-card (PLX90xx) and disable Local_1,

	 * Local_2 interrupts

	 * Disable interrupts from PCI-card and disable local

	 * interrupts

	 */

	if (pdev->device != PCI_DEVICE_ID_PLX_9056)

		iowrite32(0x0, card->conf_addr + PLX_INTCSR);

	else

		iowrite32(0x0, card->conf_addr + PLX9056_INTCSR);



	if (card->conf_addr)

		pci_iounmap(pdev, card->conf_addr);
@@ -367,6 +490,7 @@ static int __devinit plx_pci_add_card(struct pci_dev *pdev, 
	card->conf_addr = addr + ci->conf_map.offset;



	ci->reset_func(pdev);

	card->reset_func = ci->reset_func;



	/* Detect available channels */

	for (i = 0; i < ci->channel_count; i++) {
@@ -438,10 +562,17 @@ static int __devinit plx_pci_add_card(struct pci_dev *pdev, 
	 * Enable interrupts from PCI-card (PLX90xx) and enable Local_1,

	 * Local_2 interrupts from the SJA1000 chips

	 */

	if (pdev->device != PCI_DEVICE_ID_PLX_9056) {

		val = ioread32(card->conf_addr + PLX_INTCSR);

		if (pdev->subsystem_vendor == PCI_VENDOR_ID_ESDGMBH)

			val |= PLX_LINT1_EN | PLX_PCI_INT_EN;

		else

			val |= PLX_LINT1_EN | PLX_LINT2_EN | PLX_PCI_INT_EN;

		iowrite32(val, card->conf_addr + PLX_INTCSR);



	} else {

		iowrite32(PLX9056_LINTI | PLX9056_PCI_INT_EN,

			  card->conf_addr + PLX9056_INTCSR);

	}

	return 0;



failure_cleanup: