drivers/pcmcia/sa1111_generic.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/drivers/pcmcia/sa1111_generic.c
  *
  * We implement the generic parts of a SA1111 PCMCIA driver.  This
  * basically means we handle everything except controlling the
  * power.  Power is machine specific...
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/ioport.h>
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/slab.h>

 #include <pcmcia/ss.h>

 #include <mach/hardware.h>
 #include <asm/hardware/sa1111.h>
 #include <asm/mach-types.h>
 #include <asm/irq.h>

 #include "sa1111_generic.h"

 /*
  * These are offsets from the above base.
  */
 #define PCCR	0x0000
 #define PCSSR	0x0004
 #define PCSR	0x0008

 #define PCSR_S0_READY	(1<<0)
 #define PCSR_S1_READY	(1<<1)
 #define PCSR_S0_DETECT	(1<<2)
 #define PCSR_S1_DETECT	(1<<3)
 #define PCSR_S0_VS1	(1<<4)
 #define PCSR_S0_VS2	(1<<5)
 #define PCSR_S1_VS1	(1<<6)
 #define PCSR_S1_VS2	(1<<7)
 #define PCSR_S0_WP	(1<<8)
 #define PCSR_S1_WP	(1<<9)
 #define PCSR_S0_BVD1	(1<<10)
 #define PCSR_S0_BVD2	(1<<11)
 #define PCSR_S1_BVD1	(1<<12)
 #define PCSR_S1_BVD2	(1<<13)

 #define PCCR_S0_RST	(1<<0)
 #define PCCR_S1_RST	(1<<1)
 #define PCCR_S0_FLT	(1<<2)
 #define PCCR_S1_FLT	(1<<3)
 #define PCCR_S0_PWAITEN	(1<<4)
 #define PCCR_S1_PWAITEN	(1<<5)
 #define PCCR_S0_PSE	(1<<6)
 #define PCCR_S1_PSE	(1<<7)

 #define PCSSR_S0_SLEEP	(1<<0)
 #define PCSSR_S1_SLEEP	(1<<1)

 #define IDX_IRQ_S0_READY_NINT	(0)
 #define IDX_IRQ_S0_CD_VALID	(1)
 #define IDX_IRQ_S0_BVD1_STSCHG	(2)
 #define IDX_IRQ_S1_READY_NINT	(3)
 #define IDX_IRQ_S1_CD_VALID	(4)
 #define IDX_IRQ_S1_BVD1_STSCHG	(5)
 #define NUM_IRQS		(6)

 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
 {
 	struct sa1111_pcmcia_socket *s = to_skt(skt);
 	u32 status = readl_relaxed(s->dev->mapbase + PCSR);

 	switch (skt->nr) {
 	case 0:
 		state->detect = status & PCSR_S0_DETECT ? 0 : 1;
 		state->ready  = status & PCSR_S0_READY  ? 1 : 0;
 		state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
 		state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
 		state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
 		state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
 		state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
 		break;

 	case 1:
 		state->detect = status & PCSR_S1_DETECT ? 0 : 1;
 		state->ready  = status & PCSR_S1_READY  ? 1 : 0;
 		state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
 		state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
 		state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
 		state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
 		state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
 		break;
 	}
 }

 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
 {
 	struct sa1111_pcmcia_socket *s = to_skt(skt);
 	u32 pccr_skt_mask, pccr_set_mask, val;
 	unsigned long flags;

 	switch (skt->nr) {
 	case 0:
 		pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
 		break;

 	case 1:
 		pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
 		break;

 	default:
 		return -1;
 	}

 	pccr_set_mask = 0;

 	if (state->Vcc != 0)
 		pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
 	if (state->Vcc == 50)
 		pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
 	if (state->flags & SS_RESET)
 		pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
 	if (state->flags & SS_OUTPUT_ENA)
 		pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;

 	local_irq_save(flags);
 	val = readl_relaxed(s->dev->mapbase + PCCR);
 	val &= ~pccr_skt_mask;
 	val |= pccr_set_mask & pccr_skt_mask;
 	writel_relaxed(val, s->dev->mapbase + PCCR);
 	local_irq_restore(flags);

 	return 0;
 }

 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 	int (*add)(struct soc_pcmcia_socket *))
 {
 	struct sa1111_pcmcia_socket *s;
 	struct clk *clk;
 	int i, ret = 0, irqs[NUM_IRQS];

 	clk = devm_clk_get(&dev->dev, NULL);
 	if (IS_ERR(clk))
 		return PTR_ERR(clk);

 	for (i = 0; i < NUM_IRQS; i++) {
 		irqs[i] = sa1111_get_irq(dev, i);
 		if (irqs[i] <= 0)
 			return irqs[i] ? : -ENXIO;
 	}

 	ops->socket_state = sa1111_pcmcia_socket_state;

 	for (i = 0; i < ops->nr; i++) {
 		s = kzalloc(sizeof(*s), GFP_KERNEL);
 		if (!s)
 			return -ENOMEM;

 		s->soc.nr = ops->first + i;
 		s->soc.clk = clk;

 		soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
 		s->dev = dev;
 		if (s->soc.nr) {
 			s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
 			s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
 			s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
 			s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
 			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
 		} else {
 			s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
 			s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
 			s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
 			s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
 			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
 		}

 		ret = add(&s->soc);
 		if (ret == 0) {
 			s->next = dev_get_drvdata(&dev->dev);
 			dev_set_drvdata(&dev->dev, s);
 		} else
 			kfree(s);
 	}

 	return ret;
 }

 static int pcmcia_probe(struct sa1111_dev *dev)
 {
 	void __iomem *base;
 	int ret;

 	ret = sa1111_enable_device(dev);
 	if (ret)
 		return ret;

 	dev_set_drvdata(&dev->dev, NULL);

 	if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
 		sa1111_disable_device(dev);
 		return -EBUSY;
 	}

 	base = dev->mapbase;

 	/*
 	 * Initialise the suspend state.
 	 */
 	writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
 	writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);

 	ret = -ENODEV;
 #ifdef CONFIG_SA1100_BADGE4
 	if (machine_is_badge4())
 		ret = pcmcia_badge4_init(dev);
 #endif
 #ifdef CONFIG_SA1100_JORNADA720
 	if (machine_is_jornada720())
 		ret = pcmcia_jornada720_init(dev);
 #endif
 #ifdef CONFIG_ARCH_LUBBOCK
 	if (machine_is_lubbock())
 		ret = pcmcia_lubbock_init(dev);
 #endif
 #ifdef CONFIG_ASSABET_NEPONSET
 	if (machine_is_assabet())
 		ret = pcmcia_neponset_init(dev);
 #endif

 	if (ret) {
 		release_mem_region(dev->res.start, 512);
 		sa1111_disable_device(dev);
 	}

 	return ret;
 }

 static int pcmcia_remove(struct sa1111_dev *dev)
 {
 	struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);

 	dev_set_drvdata(&dev->dev, NULL);

 	for (; s; s = next) {
 		next = s->next;
 		soc_pcmcia_remove_one(&s->soc);
 		kfree(s);
 	}

 	release_mem_region(dev->res.start, 512);
 	sa1111_disable_device(dev);
 	return 0;
 }

 static struct sa1111_driver pcmcia_driver = {
 	.drv = {
 		.name	= "sa1111-pcmcia",
 	},
 	.devid		= SA1111_DEVID_PCMCIA,
 	.probe		= pcmcia_probe,
 	.remove		= pcmcia_remove,
 };

 static int __init sa1111_drv_pcmcia_init(void)
 {
 	return sa1111_driver_register(&pcmcia_driver);
 }

 static void __exit sa1111_drv_pcmcia_exit(void)
 {
 	sa1111_driver_unregister(&pcmcia_driver);
 }

 fs_initcall(sa1111_drv_pcmcia_init);
 module_exit(sa1111_drv_pcmcia_exit);

 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* linux/drivers/pcmcia/sa1111_generic.c
	*
	* We implement the generic parts of a SA1111 PCMCIA driver. This
	* basically means we handle everything except controlling the
	* power. Power is machine specific...
	*/
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/ioport.h>
	#include <linux/device.h>
	#include <linux/interrupt.h>
	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/slab.h>

	#include <pcmcia/ss.h>

	#include <mach/hardware.h>
	#include <asm/hardware/sa1111.h>
	#include <asm/mach-types.h>
	#include <asm/irq.h>

	#include "sa1111_generic.h"

	/*
	* These are offsets from the above base.
	*/
	#define PCCR 0x0000
	#define PCSSR 0x0004
	#define PCSR 0x0008

	#define PCSR_S0_READY (1<<0)
	#define PCSR_S1_READY (1<<1)
	#define PCSR_S0_DETECT (1<<2)
	#define PCSR_S1_DETECT (1<<3)
	#define PCSR_S0_VS1 (1<<4)
	#define PCSR_S0_VS2 (1<<5)
	#define PCSR_S1_VS1 (1<<6)
	#define PCSR_S1_VS2 (1<<7)
	#define PCSR_S0_WP (1<<8)
	#define PCSR_S1_WP (1<<9)
	#define PCSR_S0_BVD1 (1<<10)
	#define PCSR_S0_BVD2 (1<<11)
	#define PCSR_S1_BVD1 (1<<12)
	#define PCSR_S1_BVD2 (1<<13)

	#define PCCR_S0_RST (1<<0)
	#define PCCR_S1_RST (1<<1)
	#define PCCR_S0_FLT (1<<2)
	#define PCCR_S1_FLT (1<<3)
	#define PCCR_S0_PWAITEN (1<<4)
	#define PCCR_S1_PWAITEN (1<<5)
	#define PCCR_S0_PSE (1<<6)
	#define PCCR_S1_PSE (1<<7)

	#define PCSSR_S0_SLEEP (1<<0)
	#define PCSSR_S1_SLEEP (1<<1)

	#define IDX_IRQ_S0_READY_NINT (0)
	#define IDX_IRQ_S0_CD_VALID (1)
	#define IDX_IRQ_S0_BVD1_STSCHG (2)
	#define IDX_IRQ_S1_READY_NINT (3)
	#define IDX_IRQ_S1_CD_VALID (4)
	#define IDX_IRQ_S1_BVD1_STSCHG (5)
	#define NUM_IRQS (6)

	void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket skt, struct pcmcia_state state)
	{
	struct sa1111_pcmcia_socket *s = to_skt(skt);
	u32 status = readl_relaxed(s->dev->mapbase + PCSR);

	switch (skt->nr) {
	case 0:
	state->detect = status & PCSR_S0_DETECT ? 0 : 1;
	state->ready = status & PCSR_S0_READY ? 1 : 0;
	state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0;
	state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0;
	state->wrprot = status & PCSR_S0_WP ? 1 : 0;
	state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1;
	state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1;
	break;

	case 1:
	state->detect = status & PCSR_S1_DETECT ? 0 : 1;
	state->ready = status & PCSR_S1_READY ? 1 : 0;
	state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0;
	state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0;
	state->wrprot = status & PCSR_S1_WP ? 1 : 0;
	state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1;
	state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1;
	break;
	}
	}

	int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket skt, const socket_state_t state)
	{
	struct sa1111_pcmcia_socket *s = to_skt(skt);
	u32 pccr_skt_mask, pccr_set_mask, val;
	unsigned long flags;

	switch (skt->nr) {
	case 0:
	pccr_skt_mask = PCCR_S0_RST\|PCCR_S0_FLT\|PCCR_S0_PWAITEN\|PCCR_S0_PSE;
	break;

	case 1:
	pccr_skt_mask = PCCR_S1_RST\|PCCR_S1_FLT\|PCCR_S1_PWAITEN\|PCCR_S1_PSE;
	break;

	default:
	return -1;
	}

	pccr_set_mask = 0;

	if (state->Vcc != 0)
	pccr_set_mask \|= PCCR_S0_PWAITEN\|PCCR_S1_PWAITEN;
	if (state->Vcc == 50)
	pccr_set_mask \|= PCCR_S0_PSE\|PCCR_S1_PSE;
	if (state->flags & SS_RESET)
	pccr_set_mask \|= PCCR_S0_RST\|PCCR_S1_RST;
	if (state->flags & SS_OUTPUT_ENA)
	pccr_set_mask \|= PCCR_S0_FLT\|PCCR_S1_FLT;

	local_irq_save(flags);
	val = readl_relaxed(s->dev->mapbase + PCCR);
	val &= ~pccr_skt_mask;
	val \|= pccr_set_mask & pccr_skt_mask;
	writel_relaxed(val, s->dev->mapbase + PCCR);
	local_irq_restore(flags);

	return 0;
	}

	int sa1111_pcmcia_add(struct sa1111_dev dev, struct pcmcia_low_level ops,
	int (add)(struct soc_pcmcia_socket ))
	{
	struct sa1111_pcmcia_socket *s;
	struct clk *clk;
	int i, ret = 0, irqs[NUM_IRQS];

	clk = devm_clk_get(&dev->dev, NULL);
	if (IS_ERR(clk))
	return PTR_ERR(clk);

	for (i = 0; i < NUM_IRQS; i++) {
	irqs[i] = sa1111_get_irq(dev, i);
	if (irqs[i] <= 0)
	return irqs[i] ? : -ENXIO;
	}

	ops->socket_state = sa1111_pcmcia_socket_state;

	for (i = 0; i < ops->nr; i++) {
	s = kzalloc(sizeof(*s), GFP_KERNEL);
	if (!s)
	return -ENOMEM;

	s->soc.nr = ops->first + i;
	s->soc.clk = clk;

	soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
	s->dev = dev;
	if (s->soc.nr) {
	s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
	s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
	s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
	s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
	s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
	} else {
	s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
	s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
	s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
	s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
	s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
	}

	ret = add(&s->soc);
	if (ret == 0) {
	s->next = dev_get_drvdata(&dev->dev);
	dev_set_drvdata(&dev->dev, s);
	} else
	kfree(s);
	}

	return ret;
	}

	static int pcmcia_probe(struct sa1111_dev *dev)
	{
	void __iomem *base;
	int ret;

	ret = sa1111_enable_device(dev);
	if (ret)
	return ret;

	dev_set_drvdata(&dev->dev, NULL);

	if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
	sa1111_disable_device(dev);
	return -EBUSY;
	}

	base = dev->mapbase;

	/*
	* Initialise the suspend state.
	*/
	writel_relaxed(PCSSR_S0_SLEEP \| PCSSR_S1_SLEEP, base + PCSSR);
	writel_relaxed(PCCR_S0_FLT \| PCCR_S1_FLT, base + PCCR);

	ret = -ENODEV;
	#ifdef CONFIG_SA1100_BADGE4
	if (machine_is_badge4())
	ret = pcmcia_badge4_init(dev);
	#endif
	#ifdef CONFIG_SA1100_JORNADA720
	if (machine_is_jornada720())
	ret = pcmcia_jornada720_init(dev);
	#endif
	#ifdef CONFIG_ARCH_LUBBOCK
	if (machine_is_lubbock())
	ret = pcmcia_lubbock_init(dev);
	#endif
	#ifdef CONFIG_ASSABET_NEPONSET
	if (machine_is_assabet())
	ret = pcmcia_neponset_init(dev);
	#endif

	if (ret) {
	release_mem_region(dev->res.start, 512);
	sa1111_disable_device(dev);
	}

	return ret;
	}

	static int pcmcia_remove(struct sa1111_dev *dev)
	{
	struct sa1111_pcmcia_socket next, s = dev_get_drvdata(&dev->dev);

	dev_set_drvdata(&dev->dev, NULL);

	for (; s; s = next) {
	next = s->next;
	soc_pcmcia_remove_one(&s->soc);
	kfree(s);
	}

	release_mem_region(dev->res.start, 512);
	sa1111_disable_device(dev);
	return 0;
	}

	static struct sa1111_driver pcmcia_driver = {
	.drv = {
	.name = "sa1111-pcmcia",
	},
	.devid = SA1111_DEVID_PCMCIA,
	.probe = pcmcia_probe,
	.remove = pcmcia_remove,
	};

	static int __init sa1111_drv_pcmcia_init(void)
	{
	return sa1111_driver_register(&pcmcia_driver);
	}

	static void __exit sa1111_drv_pcmcia_exit(void)
	{
	sa1111_driver_unregister(&pcmcia_driver);
	}

	fs_initcall(sa1111_drv_pcmcia_init);
	module_exit(sa1111_drv_pcmcia_exit);

	MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
	MODULE_LICENSE("GPL");