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Commit 22329b51 authored by Brent Casavant's avatar Brent Casavant Committed by Linus Torvalds
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[PATCH] ioc4: Core driver rewrite 



This series of patches reworks the configuration and internal structure
of the SGI IOC4 I/O controller device drivers.

These changes are motivated by several factors:

- The IOC4 chip PCI resources are of mixed use between functions (i.e.
  multiple functions are handled in the same address range, sometimes
  within the same register), muddling resource ownership and initialization
  issues.  Centralizing this ownership in a core driver is desirable.

- The IOC4 chip implements multiple functions (serial, IDE, others not
  yet implemented in the mainline kernel) but is not a multifunction
  PCI device.  In order to properly handle device addition and removal
  as well as module insertion and deletion, an intermediary IOC4-specific
  driver layer is needed to handle these operations cleanly.

- All IOC4 drivers are currently enabled by a single CONFIG value.  As
  not all systems need all IOC4 functions, it is desireable to enable
  these drivers independently.

- The current IOC4 core driver will trigger loading of all function-level
  drivers, as it makes direct calls to them.  This situation should be
  reversed (i.e. function-level drivers cause loading of core driver)
  in order to maintain a clear and least-surprise driver loading model.

- IOC4 hardware design necessitates some driver-level dependency on
  the PCI bus clock speed.  Current code assumes a 66MHz bus, but the
  speed should be autodetected and appropriate compensation taken.

This patch series effects the above changes by a newly and better designed
IOC4 core driver with which the function-level drivers can register and
deregister themselves upon module insertion/removal.  By tracking these
modules, device addition/removal is also handled properly.  PCI resource
management and ownership issues are centralized in this core driver, and
IOC4-wide configuration actions such as bus speed detection are also
handled in this core driver.

This patch:

The SGI IOC4 I/O controller chip implements multiple functions, though it is
not a multi-function PCI device.  Additionally, various PCI resources of the
IOC4 are shared by multiple hardware functions, and thus resource ownership by
driver is not clearly delineated.  Due to the current driver design, all core
and subordinate drivers must be loaded, or none, which is undesirable if not
all IOC4 hardware features are being used.

This patch reorganizes the IOC4 drivers so that the core driver provides a
subdriver registration service.  Through appropriate callbacks the subdrivers
can now handle device addition and removal, as well as module insertion and
deletion (though the IOC4 IDE driver requires further work before module
deletion will work).  The core driver now takes care of allocating PCI
resources and data which must be shared between subdrivers, to clearly
delineate module ownership of these items.

Signed-off-by: default avatarBrent Casavant <bcasavan@sgi.com>
Acked-by: default avatarPat Gefre <pfg@sgi.com>
Acked-by: default avatarJeremy Higdon <jeremy@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e400bae9

Documentation/sgi-ioc4.txt

0 → 100644
+45 −0
Original line number Original line Diff line number Diff line 
The SGI IOC4 PCI device is a bit of a strange beast, so some notes on

it are in order.



First, even though the IOC4 performs multiple functions, such as an

IDE controller, a serial controller, a PS/2 keyboard/mouse controller,

and an external interrupt mechanism, it's not implemented as a

multifunction device.  The consequence of this from a software

standpoint is that all these functions share a single IRQ, and

they can't all register to own the same PCI device ID.  To make

matters a bit worse, some of the register blocks (and even registers

themselves) present in IOC4 are mixed-purpose between these several

functions, meaning that there's no clear "owning" device driver.



The solution is to organize the IOC4 driver into several independent

drivers, "ioc4", "sgiioc4", and "ioc4_serial".  Note that there is no

PS/2 controller driver as this functionality has never been wired up

on a shipping IO card.



ioc4

====

This is the core (or shim) driver for IOC4.  It is responsible for

initializing the basic functionality of the chip, and allocating

the PCI resources that are shared between the IOC4 functions.



This driver also provides registration functions that the other

IOC4 drivers can call to make their presence known.  Each driver

needs to provide a probe and remove function, which are invoked

by the core driver at appropriate times.  The interface of these

IOC4 function probe and remove operations isn't precisely the same

as PCI device probe and remove operations, but is logically the

same operation.



sgiioc4

=======

This is the IDE driver for IOC4.  Its name isn't very descriptive

simply for historical reasons (it used to be the only IOC4 driver

component).  There's not much to say about it other than it hooks

up to the ioc4 driver via the appropriate registration, probe, and

remove functions.



ioc4_serial

===========

This is the serial driver for IOC4.  There's not much to say about it

other than it hooks up to the ioc4 driver via the appropriate registration,

probe, and remove functions.

drivers/ide/pci/sgiioc4.c

+25 −5
Original line number Original line Diff line number Diff line
@@ -34,7 +34,7 @@ 
#include <linux/mm.h>

#include <linux/mm.h>

#include <linux/ioport.h>

#include <linux/ioport.h>

#include <linux/blkdev.h>

#include <linux/blkdev.h>

#include <linux/ioc4_common.h>

#include <linux/ioc4.h>

#include <asm/io.h>

#include <asm/io.h>





#include <linux/ide.h>

#include <linux/ide.h>
@@ -715,14 +715,34 @@ static ide_pci_device_t sgiioc4_chipsets[] __devinitdata = { 
};

};





int

int

ioc4_ide_attach_one(struct pci_dev *dev, const struct pci_device_id *id)

ioc4_ide_attach_one(struct ioc4_driver_data *idd)

{

{

	return pci_init_sgiioc4(dev, &sgiioc4_chipsets[id->driver_data]);

	return pci_init_sgiioc4(idd->idd_pdev,

				&sgiioc4_chipsets[idd->idd_pci_id->driver_data]);

}

}





static struct ioc4_submodule ioc4_ide_submodule = {

	.is_name = "IOC4_ide",

	.is_owner = THIS_MODULE,

	.is_probe = ioc4_ide_attach_one,

/*	.is_remove = ioc4_ide_remove_one,	*/

};



static int __devinit

ioc4_ide_init(void)

{

	return ioc4_register_submodule(&ioc4_ide_submodule);

}



static void __devexit

ioc4_ide_exit(void)

{

	ioc4_unregister_submodule(&ioc4_ide_submodule);

}



module_init(ioc4_ide_init);

module_exit(ioc4_ide_exit);





MODULE_AUTHOR("Aniket Malatpure - Silicon Graphics Inc. (SGI)");

MODULE_AUTHOR("Aniket Malatpure - Silicon Graphics Inc. (SGI)");

MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");

MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");

MODULE_LICENSE("GPL");
 
MODULE_LICENSE("GPL");
 


EXPORT_SYMBOL(ioc4_ide_attach_one);

drivers/serial/ioc4_serial.c

+129 −182
Original line number Original line Diff line number Diff line
@@ -20,7 +20,7 @@ 
#include <linux/serial_reg.h>

#include <linux/serial_reg.h>

#include <linux/module.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/pci.h>

#include <linux/ioc4_common.h>

#include <linux/ioc4.h>

#include <linux/serial_core.h>

#include <linux/serial_core.h>





/*

/*
@@ -136,6 +136,13 @@ 
#define IOC4_OTHER_IR_S1_MEMERR		0x00000008  /* Port 1 PCI error */

#define IOC4_OTHER_IR_S1_MEMERR		0x00000008  /* Port 1 PCI error */

#define IOC4_OTHER_IR_S2_MEMERR		0x00000010  /* Port 2 PCI error */

#define IOC4_OTHER_IR_S2_MEMERR		0x00000010  /* Port 2 PCI error */

#define IOC4_OTHER_IR_S3_MEMERR		0x00000020  /* Port 3 PCI error */

#define IOC4_OTHER_IR_S3_MEMERR		0x00000020  /* Port 3 PCI error */

#define IOC4_OTHER_IR_KBD_INT		0x00000040  /* Keyboard/mouse */

#define IOC4_OTHER_IR_RESERVED		0x007fff80  /* Reserved */

#define IOC4_OTHER_IR_RT_INT		0x00800000  /* INT_OUT section output */

#define IOC4_OTHER_IR_GEN_INT		0xff000000  /* Generic pins */



#define IOC4_OTHER_IR_SER_MEMERR (IOC4_OTHER_IR_S0_MEMERR | IOC4_OTHER_IR_S1_MEMERR | \

				  IOC4_OTHER_IR_S2_MEMERR | IOC4_OTHER_IR_S3_MEMERR)





/* Bitmasks for IOC4_SIO_CR */

/* Bitmasks for IOC4_SIO_CR */

#define IOC4_SIO_CR_CMD_PULSE_SHIFT              0  /* byte bus strobe shift */

#define IOC4_SIO_CR_CMD_PULSE_SHIFT              0  /* byte bus strobe shift */
@@ -274,50 +281,6 @@ struct ioc4_uartregs { 
#define i4u_dlm u2.dlm

#define i4u_dlm u2.dlm

#define i4u_fcr u3.fcr

#define i4u_fcr u3.fcr





/* PCI memory space register map addressed using pci_bar0 */

struct ioc4_memregs {

	struct ioc4_mem {

		/* Miscellaneous IOC4  registers */

		uint32_t pci_err_addr_l;

		uint32_t pci_err_addr_h;

		uint32_t sio_ir;

		uint32_t other_ir;



		/* These registers are read-only for general kernel code.  */

		uint32_t sio_ies_ro;

		uint32_t other_ies_ro;

		uint32_t sio_iec_ro;

		uint32_t other_iec_ro;

		uint32_t sio_cr;

		uint32_t misc_fill1;

		uint32_t int_out;

		uint32_t misc_fill2;

		uint32_t gpcr_s;

		uint32_t gpcr_c;

		uint32_t gpdr;

		uint32_t misc_fill3;

		uint32_t gppr_0;

		uint32_t gppr_1;

		uint32_t gppr_2;

		uint32_t gppr_3;

		uint32_t gppr_4;

		uint32_t gppr_5;

		uint32_t gppr_6;

		uint32_t gppr_7;

	} ioc4_mem;



	char misc_fill4[0x100 - 0x5C - 4];



	/* ATA/ATAP registers */

	uint32_t ata_notused[9];

	char ata_fill1[0x140 - 0x120 - 4];

	uint32_t ata_notused1[8];

	char ata_fill2[0x200 - 0x15C - 4];



	/* Keyboard and mouse registers */

	uint32_t km_notused[5];;

	char km_fill1[0x300 - 0x210 - 4];



/* Serial port registers used for DMA serial I/O */

/* Serial port registers used for DMA serial I/O */

struct ioc4_serial {

struct ioc4_serial {

	uint32_t sbbr01_l;

	uint32_t sbbr01_l;
@@ -334,7 +297,6 @@ struct ioc4_memregs { 
	struct ioc4_uartregs uart_2;

	struct ioc4_uartregs uart_2;

	struct ioc4_uartregs uart_3;

	struct ioc4_uartregs uart_3;

} ioc4_serial;

} ioc4_serial;

};





/* UART clock speed */

/* UART clock speed */

#define IOC4_SER_XIN_CLK        IOC4_SER_XIN_CLK_66

#define IOC4_SER_XIN_CLK        IOC4_SER_XIN_CLK_66
@@ -412,8 +374,8 @@ enum sio_proto { 
					| UART_LCR_WLEN7 | UART_LCR_WLEN8)

					| UART_LCR_WLEN7 | UART_LCR_WLEN8)

#define LCR_MASK_STOP_BITS	(UART_LCR_STOP)

#define LCR_MASK_STOP_BITS	(UART_LCR_STOP)





#define PENDING(_p)	(readl(&(_p)->ip_mem->sio_ir) & _p->ip_ienb)

#define PENDING(_p)	(readl(&(_p)->ip_mem->sio_ir.raw) & _p->ip_ienb)

#define READ_SIO_IR(_p) readl(&(_p)->ip_mem->sio_ir)

#define READ_SIO_IR(_p) readl(&(_p)->ip_mem->sio_ir.raw)





/* Default to 4k buffers */

/* Default to 4k buffers */

#ifdef IOC4_1K_BUFFERS

#ifdef IOC4_1K_BUFFERS
@@ -447,7 +409,7 @@ struct ioc4_control { 
 */

 */

#define MAX_IOC4_INTR_ENTS	(8 * sizeof(uint32_t))

#define MAX_IOC4_INTR_ENTS	(8 * sizeof(uint32_t))

struct ioc4_soft {

struct ioc4_soft {

	struct ioc4_mem __iomem *is_ioc4_mem_addr;

	struct ioc4_misc_regs __iomem *is_ioc4_misc_addr;

	struct ioc4_serial __iomem *is_ioc4_serial_addr;

	struct ioc4_serial __iomem *is_ioc4_serial_addr;





	/* Each interrupt type has an entry in the array */

	/* Each interrupt type has an entry in the array */
@@ -486,7 +448,7 @@ struct ioc4_port { 
	struct ioc4_soft *ip_ioc4_soft;

	struct ioc4_soft *ip_ioc4_soft;





	/* pci mem addresses */

	/* pci mem addresses */

	struct ioc4_mem __iomem *ip_mem;

	struct ioc4_misc_regs __iomem *ip_mem;

	struct ioc4_serial __iomem *ip_serial;

	struct ioc4_serial __iomem *ip_serial;

	struct ioc4_serialregs __iomem *ip_serial_regs;

	struct ioc4_serialregs __iomem *ip_serial_regs;

	struct ioc4_uartregs __iomem *ip_uart_regs;

	struct ioc4_uartregs __iomem *ip_uart_regs;
@@ -553,7 +515,7 @@ struct hooks { 
	uint32_t intr_dma_error;

	uint32_t intr_dma_error;

	uint32_t intr_clear;

	uint32_t intr_clear;

	uint32_t intr_all;

	uint32_t intr_all;

	char rs422_select_pin;

	int rs422_select_pin;

};

};





static struct hooks hooks_array[IOC4_NUM_SERIAL_PORTS] = {

static struct hooks hooks_array[IOC4_NUM_SERIAL_PORTS] = {
@@ -669,7 +631,7 @@ static void handle_intr(void *arg, uint32_t sio_ir); 
static inline void

static inline void

write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type)

write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type)

{

{

	struct ioc4_mem __iomem *mem = ioc4_soft->is_ioc4_mem_addr;

	struct ioc4_misc_regs __iomem *mem = ioc4_soft->is_ioc4_misc_addr;

	unsigned long flags;

	unsigned long flags;





	spin_lock_irqsave(&ioc4_soft->is_ir_lock, flags);

	spin_lock_irqsave(&ioc4_soft->is_ir_lock, flags);
@@ -678,11 +640,11 @@ write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type) 
	case IOC4_SIO_INTR_TYPE:

	case IOC4_SIO_INTR_TYPE:

		switch (which) {

		switch (which) {

		case IOC4_W_IES:

		case IOC4_W_IES:

			writel(val, &mem->sio_ies_ro);

			writel(val, &mem->sio_ies.raw);

			break;

			break;





		case IOC4_W_IEC:

		case IOC4_W_IEC:

			writel(val, &mem->sio_iec_ro);

			writel(val, &mem->sio_iec.raw);

			break;

			break;

		}

		}

		break;

		break;
@@ -690,11 +652,11 @@ write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type) 
	case IOC4_OTHER_INTR_TYPE:

	case IOC4_OTHER_INTR_TYPE:

		switch (which) {

		switch (which) {

		case IOC4_W_IES:

		case IOC4_W_IES:

			writel(val, &mem->other_ies_ro);

			writel(val, &mem->other_ies.raw);

			break;

			break;





		case IOC4_W_IEC:

		case IOC4_W_IEC:

			writel(val, &mem->other_iec_ro);

			writel(val, &mem->other_iec.raw);

			break;

			break;

		}

		}

		break;

		break;
@@ -747,7 +709,8 @@ static int set_baud(struct ioc4_port *port, int baud) 
 */

 */

static struct ioc4_port *get_ioc4_port(struct uart_port *the_port)

static struct ioc4_port *get_ioc4_port(struct uart_port *the_port)

{

{

	struct ioc4_control *control = dev_get_drvdata(the_port->dev);

	struct ioc4_driver_data *idd = dev_get_drvdata(the_port->dev);

	struct ioc4_control *control = idd->idd_serial_data;

	int ii;

	int ii;





	if (control) {

	if (control) {
@@ -782,7 +745,7 @@ static struct ioc4_port *get_ioc4_port(struct uart_port *the_port) 
static inline uint32_t

static inline uint32_t

pending_intrs(struct ioc4_soft *soft, int type)

pending_intrs(struct ioc4_soft *soft, int type)

{

{

	struct ioc4_mem __iomem *mem = soft->is_ioc4_mem_addr;

	struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr;

	unsigned long flag;

	unsigned long flag;

	uint32_t intrs = 0;

	uint32_t intrs = 0;
@@ -793,11 +756,11 @@ pending_intrs(struct ioc4_soft *soft, int type) 




	switch (type) {

	switch (type) {

	case IOC4_SIO_INTR_TYPE:

	case IOC4_SIO_INTR_TYPE:

		intrs = readl(&mem->sio_ir) & readl(&mem->sio_ies_ro);

		intrs = readl(&mem->sio_ir.raw) & readl(&mem->sio_ies.raw);

		break;

		break;





	case IOC4_OTHER_INTR_TYPE:

	case IOC4_OTHER_INTR_TYPE:

		intrs = readl(&mem->other_ir) & readl(&mem->other_ies_ro);

		intrs = readl(&mem->other_ir.raw) & readl(&mem->other_ies.raw);





		/* Don't process any ATA interrupte */

		/* Don't process any ATA interrupte */

		intrs &= ~(IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);

		intrs &= ~(IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);
@@ -826,7 +789,7 @@ static int inline port_init(struct ioc4_port *port) 




	/* Wait until any pending bus activity for this port has ceased */

	/* Wait until any pending bus activity for this port has ceased */

	do

	do

		sio_cr = readl(&port->ip_mem->sio_cr);

		sio_cr = readl(&port->ip_mem->sio_cr.raw);

	while (!(sio_cr & IOC4_SIO_CR_SIO_DIAG_IDLE));

	while (!(sio_cr & IOC4_SIO_CR_SIO_DIAG_IDLE));





	/* Finish reset sequence */

	/* Finish reset sequence */
@@ -899,7 +862,7 @@ static int inline port_init(struct ioc4_port *port) 
	write_ireg(port->ip_ioc4_soft, hooks->intr_clear,

	write_ireg(port->ip_ioc4_soft, hooks->intr_clear,

		       IOC4_W_IEC, IOC4_SIO_INTR_TYPE);

		       IOC4_W_IEC, IOC4_SIO_INTR_TYPE);

	port->ip_ienb &= ~hooks->intr_clear;

	port->ip_ienb &= ~hooks->intr_clear;

	writel(hooks->intr_clear, &port->ip_mem->sio_ir);

	writel(hooks->intr_clear, &port->ip_mem->sio_ir.raw);

	return 0;

	return 0;

}

}
@@ -918,23 +881,23 @@ static void handle_dma_error_intr(void *arg, uint32_t other_ir) 
	spin_lock_irqsave(&port->ip_lock, flags);

	spin_lock_irqsave(&port->ip_lock, flags);





	/* ACK the interrupt */

	/* ACK the interrupt */

	writel(hooks->intr_dma_error, &port->ip_mem->other_ir);

	writel(hooks->intr_dma_error, &port->ip_mem->other_ir.raw);





	if (readl(&port->ip_mem->pci_err_addr_l) & IOC4_PCI_ERR_ADDR_VLD) {

	if (readl(&port->ip_mem->pci_err_addr_l.raw) & IOC4_PCI_ERR_ADDR_VLD) {

		printk(KERN_ERR

		printk(KERN_ERR

			"PCI error address is 0x%lx, "

			"PCI error address is 0x%lx, "

				"master is serial port %c %s\n",

				"master is serial port %c %s\n",

		     (((uint64_t)readl(&port->ip_mem->pci_err_addr_h)

		     (((uint64_t)readl(&port->ip_mem->pci_err_addr_h)

							 << 32)

							 << 32)

				| readl(&port->ip_mem->pci_err_addr_l))

				| readl(&port->ip_mem->pci_err_addr_l.raw))

					& IOC4_PCI_ERR_ADDR_ADDR_MSK, '1' +

					& IOC4_PCI_ERR_ADDR_ADDR_MSK, '1' +

		     ((char)(readl(&port->ip_mem-> pci_err_addr_l) &

		     ((char)(readl(&port->ip_mem->pci_err_addr_l.raw) &

			     IOC4_PCI_ERR_ADDR_MST_NUM_MSK) >> 1),

			     IOC4_PCI_ERR_ADDR_MST_NUM_MSK) >> 1),

		     (readl(&port->ip_mem->pci_err_addr_l)

		     (readl(&port->ip_mem->pci_err_addr_l.raw)

				& IOC4_PCI_ERR_ADDR_MST_TYP_MSK)

				& IOC4_PCI_ERR_ADDR_MST_TYP_MSK)

				? "RX" : "TX");

				? "RX" : "TX");





		if (readl(&port->ip_mem->pci_err_addr_l)

		if (readl(&port->ip_mem->pci_err_addr_l.raw)

						& IOC4_PCI_ERR_ADDR_MUL_ERR) {

						& IOC4_PCI_ERR_ADDR_MUL_ERR) {

			printk(KERN_ERR

			printk(KERN_ERR

				"Multiple errors occurred\n");

				"Multiple errors occurred\n");
@@ -1018,26 +981,26 @@ static irqreturn_t ioc4_intr(int irq, void *arg, struct pt_regs *regs) 
				"other_ies = 0x%x\n",

				"other_ies = 0x%x\n",

			       (intr_type == IOC4_SIO_INTR_TYPE) ? "sio" :

			       (intr_type == IOC4_SIO_INTR_TYPE) ? "sio" :

			       "other", this_ir,

			       "other", this_ir,

			       readl(&soft->is_ioc4_mem_addr->sio_ir),

			       readl(&soft->is_ioc4_misc_addr->sio_ir.raw),

			       readl(&soft->is_ioc4_mem_addr->sio_ies_ro),

			       readl(&soft->is_ioc4_misc_addr->sio_ies.raw),

			       readl(&soft->is_ioc4_mem_addr->other_ir),

			       readl(&soft->is_ioc4_misc_addr->other_ir.raw),

			       readl(&soft->is_ioc4_mem_addr->other_ies_ro));

			       readl(&soft->is_ioc4_misc_addr->other_ies.raw));

		}

		}

	}

	}

#ifdef DEBUG_INTERRUPTS

#ifdef DEBUG_INTERRUPTS

	{

	{

		struct ioc4_mem __iomem *mem = soft->is_ioc4_mem_addr;

		struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr;

		spinlock_t *lp = &soft->is_ir_lock;

		spinlock_t *lp = &soft->is_ir_lock;

		unsigned long flag;

		unsigned long flag;





		spin_lock_irqsave(&soft->is_ir_lock, flag);

		spin_lock_irqsave(&soft->is_ir_lock, flag);

		printk ("%s : %d : mem 0x%p sio_ir 0x%x sio_ies_ro 0x%x "

		printk ("%s : %d : mem 0x%p sio_ir 0x%x sio_ies 0x%x "

				"other_ir 0x%x other_ies_ro 0x%x mask 0x%x\n",

				"other_ir 0x%x other_ies 0x%x mask 0x%x\n",

		     __FUNCTION__, __LINE__,

		     __FUNCTION__, __LINE__,

		     (void *)mem, readl(&mem->sio_ir),

		     (void *)mem, readl(&mem->sio_ir.raw),

		     readl(&mem->sio_ies_ro),

		     readl(&mem->sio_ies.raw),

		     readl(&mem->other_ir),

		     readl(&mem->other_ir.raw),

		     readl(&mem->other_ies_ro),

		     readl(&mem->other_ies.raw),

		     IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);

		     IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);

		spin_unlock_irqrestore(&soft->is_ir_lock, flag);

		spin_unlock_irqrestore(&soft->is_ir_lock, flag);

	}

	}
@@ -1056,7 +1019,7 @@ static irqreturn_t ioc4_intr(int irq, void *arg, struct pt_regs *regs) 
 */

 */

static int inline ioc4_attach_local(struct pci_dev *pdev,

static int inline ioc4_attach_local(struct pci_dev *pdev,

			struct ioc4_control *control,

			struct ioc4_control *control,

			struct ioc4_soft *soft, void __iomem *ioc4_mem,

			struct ioc4_soft *soft, void __iomem *ioc4_misc,

			void __iomem *ioc4_serial)

			void __iomem *ioc4_serial)

{

{

	struct ioc4_port *port;

	struct ioc4_port *port;
@@ -1076,7 +1039,7 @@ static int inline ioc4_attach_local(struct pci_dev *pdev, 
				ioc4_revid, ioc4_revid_min);

				ioc4_revid, ioc4_revid_min);

		return -EPERM;

		return -EPERM;

	}

	}

	BUG_ON(ioc4_mem == NULL);

	BUG_ON(ioc4_misc == NULL);

	BUG_ON(ioc4_serial == NULL);

	BUG_ON(ioc4_serial == NULL);





	/* Create port structures for each port */

	/* Create port structures for each port */
@@ -1103,7 +1066,7 @@ static int inline ioc4_attach_local(struct pci_dev *pdev, 
		port->ip_pci_bus_speed = IOC4_SER_XIN_CLK;

		port->ip_pci_bus_speed = IOC4_SER_XIN_CLK;

		port->ip_baud = 9600;

		port->ip_baud = 9600;

		port->ip_control = control;

		port->ip_control = control;

		port->ip_mem = ioc4_mem;

		port->ip_mem = ioc4_misc;

		port->ip_serial = ioc4_serial;

		port->ip_serial = ioc4_serial;





		/* point to the right hook */

		/* point to the right hook */
@@ -1604,14 +1567,12 @@ static int ioc4_set_proto(struct ioc4_port *port, enum sio_proto proto) 
	switch (proto) {

	switch (proto) {

	case PROTO_RS232:

	case PROTO_RS232:

		/* Clear the appropriate GIO pin */

		/* Clear the appropriate GIO pin */

		writel(0, (&port->ip_mem->gppr_0 +

		writel(0, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw));

				  hooks->rs422_select_pin));

		break;

		break;





	case PROTO_RS422:

	case PROTO_RS422:

		/* Set the appropriate GIO pin */

		/* Set the appropriate GIO pin */

		writel(1, (&port->ip_mem->gppr_0 +

		writel(1, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw));

				  hooks->rs422_select_pin));

		break;

		break;





	default:

	default:
@@ -1885,7 +1846,7 @@ static void handle_intr(void *arg, uint32_t sio_ir) 
		if (sio_ir & hooks->intr_delta_dcd) {

		if (sio_ir & hooks->intr_delta_dcd) {

			/* ACK the interrupt */

			/* ACK the interrupt */

			writel(hooks->intr_delta_dcd,

			writel(hooks->intr_delta_dcd,

				&port->ip_mem->sio_ir);

				&port->ip_mem->sio_ir.raw);





			shadow = readl(&port->ip_serial_regs->shadow);

			shadow = readl(&port->ip_serial_regs->shadow);
@@ -1907,7 +1868,7 @@ static void handle_intr(void *arg, uint32_t sio_ir) 
		if (sio_ir & hooks->intr_delta_cts) {

		if (sio_ir & hooks->intr_delta_cts) {

			/* ACK the interrupt */

			/* ACK the interrupt */

			writel(hooks->intr_delta_cts,

			writel(hooks->intr_delta_cts,

					&port->ip_mem->sio_ir);

					&port->ip_mem->sio_ir.raw);





			shadow = readl(&port->ip_serial_regs->shadow);

			shadow = readl(&port->ip_serial_regs->shadow);
@@ -1928,7 +1889,7 @@ static void handle_intr(void *arg, uint32_t sio_ir) 
		if (sio_ir & hooks->intr_rx_timer) {

		if (sio_ir & hooks->intr_rx_timer) {

			/* ACK the interrupt */

			/* ACK the interrupt */

			writel(hooks->intr_rx_timer,

			writel(hooks->intr_rx_timer,

				&port->ip_mem->sio_ir);

				&port->ip_mem->sio_ir.raw);





			if ((port->ip_notify & N_DATA_READY)

			if ((port->ip_notify & N_DATA_READY)

					&& (port->ip_port)) {

					&& (port->ip_port)) {
@@ -1974,7 +1935,7 @@ static void handle_intr(void *arg, uint32_t sio_ir) 




			/* ACK the interrupt */

			/* ACK the interrupt */

			writel(hooks->intr_tx_explicit,

			writel(hooks->intr_tx_explicit,

					&port->ip_mem->sio_ir);

					&port->ip_mem->sio_ir.raw);





			if (port->ip_notify & N_OUTPUT_LOWAT)

			if (port->ip_notify & N_OUTPUT_LOWAT)

				ioc4_cb_output_lowat(port);

				ioc4_cb_output_lowat(port);
@@ -2634,7 +2595,8 @@ ioc4_serial_core_attach(struct pci_dev *pdev) 
{

{

	struct ioc4_port *port;

	struct ioc4_port *port;

	struct uart_port *the_port;

	struct uart_port *the_port;

	struct ioc4_control *control = pci_get_drvdata(pdev);

	struct ioc4_driver_data *idd = pci_get_drvdata(pdev);

	struct ioc4_control *control = idd->idd_serial_data;

	int ii;

	int ii;





	DPRINT_CONFIG(("%s: attach pdev 0x%p - control 0x%p\n",

	DPRINT_CONFIG(("%s: attach pdev 0x%p - control 0x%p\n",
@@ -2680,55 +2642,29 @@ ioc4_serial_core_attach(struct pci_dev *pdev) 




/**

/**

 * ioc4_serial_attach_one - register attach function

 * ioc4_serial_attach_one - register attach function

 *		called per card found from ioc4_serial_detect as part

 *		called per card found from IOC4 master module.

 *		of module_init().

 * @idd: Master module data for this IOC4

 * @pdev: handle for this card

 * @pci_id: pci id for this card

 */

 */

int

int

ioc4_serial_attach_one(struct pci_dev *pdev, const struct pci_device_id *pci_id)

ioc4_serial_attach_one(struct ioc4_driver_data *idd)

{

{

	struct ioc4_mem __iomem *mem;

	unsigned long tmp_addr1;

	unsigned long tmp_addr, tmp_addr1;

	struct ioc4_serial __iomem *serial;

	struct ioc4_serial __iomem *serial;

	struct ioc4_soft *soft;

	struct ioc4_soft *soft;

	struct ioc4_control *control;

	struct ioc4_control *control;

	int tmp, ret = 0;

	int ret = 0;









	DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __FUNCTION__, pdev, pci_id));

	DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __FUNCTION__, idd->idd_pdev, idd->idd_pci_id));



	/* Map in the ioc4 memory */

	tmp_addr = pci_resource_start(pdev, 0);

	if (!tmp_addr) {

		printk(KERN_WARNING

			 "ioc4 (%p) : unable to get PIO mapping for "

				"MEM space\n", (void *)pdev);

		return -ENODEV;

	}

	if (!request_region(tmp_addr, sizeof(struct ioc4_mem), "sioc4_mem")) {

		printk(KERN_ALERT

			"ioc4 (%p): unable to get request region for "

			"MEM space\n", (void *)pdev);

		return -ENODEV;

	}

	mem = ioremap(tmp_addr, sizeof(struct ioc4_mem));

	if (!mem) {

		printk(KERN_WARNING

			 "ioc4 (%p) : unable to remap ioc4 memory\n",

				(void *)pdev);

		ret = -ENODEV;

		goto out1;

	}





	/* request serial registers */

	/* request serial registers */

	tmp_addr1 = pci_resource_start(pdev, 0) + IOC4_SERIAL_OFFSET;

	tmp_addr1 = idd->idd_bar0 + IOC4_SERIAL_OFFSET;





	if (!request_region(tmp_addr1, sizeof(struct ioc4_serial),

	if (!request_region(tmp_addr1, sizeof(struct ioc4_serial),

					"sioc4_uart")) {

					"sioc4_uart")) {

		printk(KERN_WARNING

		printk(KERN_WARNING

			"ioc4 (%p): unable to get request region for "

			"ioc4 (%p): unable to get request region for "

				"uart space\n", (void *)pdev);

				"uart space\n", (void *)idd->idd_pdev);

		ret = -ENODEV;

		ret = -ENODEV;

		goto out1;

		goto out1;

	}

	}
@@ -2736,12 +2672,12 @@ ioc4_serial_attach_one(struct pci_dev *pdev, const struct pci_device_id *pci_id) 
	if (!serial) {

	if (!serial) {

		printk(KERN_WARNING

		printk(KERN_WARNING

			 "ioc4 (%p) : unable to remap ioc4 serial register\n",

			 "ioc4 (%p) : unable to remap ioc4 serial register\n",

				(void *)pdev);

				(void *)idd->idd_pdev);

		ret = -ENODEV;

		ret = -ENODEV;

		goto out2;

		goto out2;

	}

	}

	DPRINT_CONFIG(("%s : mem 0x%p, serial 0x%p\n",

	DPRINT_CONFIG(("%s : mem 0x%p, serial 0x%p\n",

				__FUNCTION__, (void *)mem, (void *)serial));

				__FUNCTION__, (void *)idd->idd_misc_regs, (void *)serial));





	/* Get memory for the new card */

	/* Get memory for the new card */

	control = kmalloc(sizeof(struct ioc4_control) * IOC4_NUM_SERIAL_PORTS,

	control = kmalloc(sizeof(struct ioc4_control) * IOC4_NUM_SERIAL_PORTS,
@@ -2754,59 +2690,57 @@ ioc4_serial_attach_one(struct pci_dev *pdev, const struct pci_device_id *pci_id) 
		goto out2;

		goto out2;

	}

	}

	memset(control, 0, sizeof(struct ioc4_control));

	memset(control, 0, sizeof(struct ioc4_control));

	pci_set_drvdata(pdev, control);

	idd->idd_serial_data = control;





	/* Allocate the soft structure */

	/* Allocate the soft structure */

	soft = kmalloc(sizeof(struct ioc4_soft), GFP_KERNEL);

	soft = kmalloc(sizeof(struct ioc4_soft), GFP_KERNEL);

	if (!soft) {

	if (!soft) {

		printk(KERN_WARNING

		printk(KERN_WARNING

		       "ioc4 (%p): unable to get memory for the soft struct\n",

		       "ioc4 (%p): unable to get memory for the soft struct\n",

		       (void *)pdev);

		       (void *)idd->idd_pdev);

		ret = -ENOMEM;

		ret = -ENOMEM;

		goto out3;

		goto out3;

	}

	}

	memset(soft, 0, sizeof(struct ioc4_soft));

	memset(soft, 0, sizeof(struct ioc4_soft));





	spin_lock_init(&soft->is_ir_lock);

	spin_lock_init(&soft->is_ir_lock);

	soft->is_ioc4_mem_addr = mem;

	soft->is_ioc4_misc_addr = idd->idd_misc_regs;

	soft->is_ioc4_serial_addr = serial;

	soft->is_ioc4_serial_addr = serial;





	/* Init the IOC4 */

	/* Init the IOC4 */

	pci_read_config_dword(pdev, PCI_COMMAND, &tmp);

	writel(0xf << IOC4_SIO_CR_CMD_PULSE_SHIFT,

	pci_write_config_dword(pdev, PCI_COMMAND,

	       &idd->idd_misc_regs->sio_cr.raw);

			       tmp | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);



	writel(0xf << IOC4_SIO_CR_CMD_PULSE_SHIFT, &mem->sio_cr);





	/* Enable serial port mode select generic PIO pins as outputs */

	/* Enable serial port mode select generic PIO pins as outputs */

	writel(IOC4_GPCR_UART0_MODESEL | IOC4_GPCR_UART1_MODESEL

	writel(IOC4_GPCR_UART0_MODESEL | IOC4_GPCR_UART1_MODESEL

		| IOC4_GPCR_UART2_MODESEL | IOC4_GPCR_UART3_MODESEL,

		| IOC4_GPCR_UART2_MODESEL | IOC4_GPCR_UART3_MODESEL,

		&mem->gpcr_s);

		&idd->idd_misc_regs->gpcr_s.raw);





	/* Clear and disable all interrupts */

	/* Clear and disable all serial interrupts */

	write_ireg(soft, ~0, IOC4_W_IEC, IOC4_SIO_INTR_TYPE);

	write_ireg(soft, ~0, IOC4_W_IEC, IOC4_SIO_INTR_TYPE);

	writel(~0, &mem->sio_ir);

	writel(~0, &idd->idd_misc_regs->sio_ir.raw);

	write_ireg(soft, ~(IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR),

	write_ireg(soft, IOC4_OTHER_IR_SER_MEMERR, IOC4_W_IEC,

			IOC4_W_IEC, IOC4_OTHER_INTR_TYPE);

		   IOC4_OTHER_INTR_TYPE);

	writel(~(IOC4_OTHER_IR_ATA_MEMERR | IOC4_OTHER_IR_ATA_MEMERR),

	writel(IOC4_OTHER_IR_SER_MEMERR, &idd->idd_misc_regs->other_ir.raw);

					&mem->other_ir);

	control->ic_soft = soft;

	control->ic_soft = soft;

	if (!request_irq(pdev->irq, ioc4_intr, SA_SHIRQ,



	/* Hook up interrupt handler */

	if (!request_irq(idd->idd_pdev->irq, ioc4_intr, SA_SHIRQ,

				"sgi-ioc4serial", (void *)soft)) {

				"sgi-ioc4serial", (void *)soft)) {

		control->ic_irq = pdev->irq;

		control->ic_irq = idd->idd_pdev->irq;

	} else {

	} else {

		printk(KERN_WARNING

		printk(KERN_WARNING

		    "%s : request_irq fails for IRQ 0x%x\n ",

		    "%s : request_irq fails for IRQ 0x%x\n ",

			__FUNCTION__, pdev->irq);

			__FUNCTION__, idd->idd_pdev->irq);

	}

	}

	if ((ret = ioc4_attach_local(pdev, control, soft,

	if ((ret = ioc4_attach_local(idd->idd_pdev, control, soft,

				soft->is_ioc4_mem_addr,

				soft->is_ioc4_misc_addr,

				soft->is_ioc4_serial_addr)))

				soft->is_ioc4_serial_addr)))

		goto out4;

		goto out4;





	/* register port with the serial core */

	/* register port with the serial core */





	if ((ret = ioc4_serial_core_attach(pdev)))

	if ((ret = ioc4_serial_core_attach(idd->idd_pdev)))

		goto out4;

		goto out4;





	return ret;

	return ret;
@@ -2819,7 +2753,6 @@ ioc4_serial_attach_one(struct pci_dev *pdev, const struct pci_device_id *pci_id) 
out2:

out2:

	release_region(tmp_addr1, sizeof(struct ioc4_serial));

	release_region(tmp_addr1, sizeof(struct ioc4_serial));

out1:

out1:

	release_region(tmp_addr, sizeof(struct ioc4_mem));





	return ret;

	return ret;

}

}
@@ -2828,11 +2761,10 @@ ioc4_serial_attach_one(struct pci_dev *pdev, const struct pci_device_id *pci_id) 
/**

/**

 * ioc4_serial_remove_one - detach function

 * ioc4_serial_remove_one - detach function

 *

 *

 * @pdev: handle for this card

 * @idd: IOC4 master module data for this IOC4

 */

 */





#if 0

int ioc4_serial_remove_one(struct ioc4_driver_data *idd)

void ioc4_serial_remove_one(struct pci_dev *pdev)

{

{

	int ii;

	int ii;

	struct ioc4_control *control;

	struct ioc4_control *control;
@@ -2840,7 +2772,7 @@ void ioc4_serial_remove_one(struct pci_dev *pdev) 
	struct ioc4_port *port;

	struct ioc4_port *port;

	struct ioc4_soft *soft;

	struct ioc4_soft *soft;





	control = pci_get_drvdata(pdev);

	control = idd->idd_serial_data;





	for (ii = 0; ii < IOC4_NUM_SERIAL_PORTS; ii++) {

	for (ii = 0; ii < IOC4_NUM_SERIAL_PORTS; ii++) {

		the_port = &control->ic_port[ii].icp_uart_port;

		the_port = &control->ic_port[ii].icp_uart_port;
@@ -2867,10 +2799,17 @@ void ioc4_serial_remove_one(struct pci_dev *pdev) 
		kfree(soft);

		kfree(soft);

	}

	}

	kfree(control);

	kfree(control);

	pci_set_drvdata(pdev, NULL);

	idd->idd_serial_data = NULL;

	uart_unregister_driver(&ioc4_uart);



	return 0;

}

}

#endif



static struct ioc4_submodule ioc4_serial_submodule = {

	.is_name = "IOC4_serial",

	.is_owner = THIS_MODULE,

	.is_probe = ioc4_serial_attach_one,

	.is_remove = ioc4_serial_remove_one,

};





/**

/**

 * ioc4_serial_init - module init

 * ioc4_serial_init - module init
@@ -2886,12 +2825,20 @@ int ioc4_serial_init(void) 
			__FUNCTION__);

			__FUNCTION__);

		return ret;

		return ret;

	}

	}

	return 0;



	/* register with IOC4 main module */

	return ioc4_register_submodule(&ioc4_serial_submodule);

}



static void __devexit ioc4_serial_exit(void)

{

	ioc4_unregister_submodule(&ioc4_serial_submodule);

	uart_unregister_driver(&ioc4_uart);

}

}





module_init(ioc4_serial_init);

module_exit(ioc4_serial_exit);



MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>");

MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>");

MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC4 Base-IO Card");

MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC4 Base-IO Card");

MODULE_LICENSE("GPL");
 
MODULE_LICENSE("GPL");
 


EXPORT_SYMBOL(ioc4_serial_init);

EXPORT_SYMBOL(ioc4_serial_attach_one);

drivers/sn/ioc4.c

+262 −28

File changed.

Preview size limit exceeded, changes collapsed.

include/linux/ioc4.h

0 → 100644
+156 −0

File added.

Preview size limit exceeded, changes collapsed.