[mirror_ubuntu-focal-kernel.git] / drivers / pcmcia / pxa2xx_trizeps4.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
 *
 * TRIZEPS PCMCIA specific routines.
 *
 * Author:	Jürgen Schindele
 * Created:	20 02, 2006
 * Copyright:	Jürgen Schindele
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

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

#include <mach/pxa2xx-regs.h>
#include <mach/trizeps4.h>

#include "soc_common.h"

extern void board_pcmcia_power(int power);

static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	/* we dont have voltage/card/ready detection
	 * so we dont need interrupts for it
	 */
	switch (skt->nr) {
	case 0:
		skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
		skt->stat[SOC_STAT_CD].name = "cs0_cd";
		skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
		skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
		break;
	default:
		break;
	}
	/* release the reset of this card */
	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);

	return 0;
}

static unsigned long trizeps_pcmcia_status[2];

static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				struct pcmcia_state *state)
{
	unsigned short status = 0, change;
	status = CFSR_readw();
	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
				ConXS_CFSR_BVD_MASK;
	if (change) {
		trizeps_pcmcia_status[skt->nr] = status;
		if (status & ConXS_CFSR_BVD1) {
			/* enable_irq empty */
		} else {
			/* disable_irq empty */
		}
	}

	switch (skt->nr) {
	case 0:
		/* just fill in fix states */
		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
		break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
	/* on ConXS we only have one slot. Second is inactive */
	case 1:
		state->detect = 0;
		state->ready  = 0;
		state->bvd1   = 0;
		state->bvd2   = 0;
		state->vs_3v  = 0;
		state->vs_Xv  = 0;
		break;

#endif
	}
}

static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
				const socket_state_t *state)
{
	int ret = 0;
	unsigned short power = 0;

	/* we do nothing here just check a bit */
	switch (state->Vcc) {
	case 0:  power &= 0xfc; break;
	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
	case 50:
		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
		break;
	default:
		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
		ret = -1;
	}

	switch (state->Vpp) {
	case 0:  power &= 0xf3; break;
	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
	case 120:
		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
		break;
	default:
		if (state->Vpp != state->Vcc) {
			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
			ret = -1;
		}
	}

	switch (skt->nr) {
	case 0:			 /* we only have 3.3V */
		board_pcmcia_power(power);
		break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
	/* on ConXS we only have one slot. Second is inactive */
	case 1:
#endif
	default:
		break;
	}

	return ret;
}

static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
	/* default is on */
	board_pcmcia_power(0x9);
}

static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
	board_pcmcia_power(0x0);
}

static struct pcmcia_low_level trizeps_pcmcia_ops = {
	.owner			= THIS_MODULE,
	.hw_init		= trizeps_pcmcia_hw_init,
	.socket_state		= trizeps_pcmcia_socket_state,
	.configure_socket	= trizeps_pcmcia_configure_socket,
	.socket_init		= trizeps_pcmcia_socket_init,
	.socket_suspend		= trizeps_pcmcia_socket_suspend,
#ifdef CONFIG_MACH_TRIZEPS_CONXS
	.nr			= 1,
#else
	.nr			= 2,
#endif
	.first			= 0,
};

static struct platform_device *trizeps_pcmcia_device;

static int __init trizeps_pcmcia_init(void)
{
	int ret;

	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
		return -ENODEV;

	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	if (!trizeps_pcmcia_device)
		return -ENOMEM;

	ret = platform_device_add_data(trizeps_pcmcia_device,
			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));

	if (ret == 0)
		ret = platform_device_add(trizeps_pcmcia_device);

	if (ret)
		platform_device_put(trizeps_pcmcia_device);

	return ret;
}

static void __exit trizeps_pcmcia_exit(void)
{
	platform_device_unregister(trizeps_pcmcia_device);
}

fs_initcall(trizeps_pcmcia_init);
module_exit(trizeps_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Juergen Schindele");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
2efa42f2 JS	2	/*
	3	* linux/drivers/pcmcia/pxa2xx_trizeps4.c
	4	*
	5	* TRIZEPS PCMCIA specific routines.
	6	*
	7	* Author: Jürgen Schindele
	8	* Created: 20 02, 2006
	9	* Copyright: Jürgen Schindele
2efa42f2 JS	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/kernel.h>
	15	#include <linux/gpio.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/platform_device.h>
	18
	19	#include <asm/mach-types.h>
	20	#include <asm/irq.h>
	21
b74d1969	22	#include <mach/pxa2xx-regs.h>
2efa42f2 JS	23	#include <mach/trizeps4.h>
	24
	25	#include "soc_common.h"
	26
	27	extern void board_pcmcia_power(int power);
	28
2efa42f2 JS	29	static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
2efa42f2 JS	30	{
2efa42f2 JS	31	/* we dont have voltage/card/ready detection
	32	* so we dont need interrupts for it
	33	*/
	34	switch (skt->nr) {
	35	case 0:
a9bb5a4b RK	36	skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
	37	skt->stat[SOC_STAT_CD].name = "cs0_cd";
	38	skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
	39	skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
2efa42f2	40	break;
2efa42f2 JS	41	default:
	42	break;
	43	}
	44	/* release the reset of this card */
66024db5	45	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
2efa42f2	46
a9bb5a4b	47	return 0;
2efa42f2 JS	48	}
	49
	50	static unsigned long trizeps_pcmcia_status[2];
	51
	52	static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	53	struct pcmcia_state *state)
	54	{
	55	unsigned short status = 0, change;
	56	status = CFSR_readw();
	57	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
	58	ConXS_CFSR_BVD_MASK;
	59	if (change) {
	60	trizeps_pcmcia_status[skt->nr] = status;
	61	if (status & ConXS_CFSR_BVD1) {
	62	/* enable_irq empty */
	63	} else {
	64	/* disable_irq empty */
	65	}
	66	}
	67
	68	switch (skt->nr) {
	69	case 0:
	70	/* just fill in fix states */
2efa42f2 JS	71	state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
	72	state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
	73	state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
	74	state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
2efa42f2 JS	75	break;
	76
	77	#ifndef CONFIG_MACH_TRIZEPS_CONXS
	78	/* on ConXS we only have one slot. Second is inactive */
	79	case 1:
	80	state->detect = 0;
	81	state->ready = 0;
	82	state->bvd1 = 0;
	83	state->bvd2 = 0;
	84	state->vs_3v = 0;
	85	state->vs_Xv = 0;
2efa42f2 JS	86	break;
	87
	88	#endif
	89	}
	90	}
	91
	92	static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	93	const socket_state_t *state)
	94	{
	95	int ret = 0;
	96	unsigned short power = 0;
	97
	98	/* we do nothing here just check a bit */
	99	switch (state->Vcc) {
	100	case 0: power &= 0xfc; break;
	101	case 33: power \|= ConXS_BCR_S0_VCC_3V3; break;
	102	case 50:
	103	pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
	104	break;
	105	default:
	106	pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
	107	ret = -1;
	108	}
	109
	110	switch (state->Vpp) {
	111	case 0: power &= 0xf3; break;
	112	case 33: power \|= ConXS_BCR_S0_VPP_3V3; break;
	113	case 120:
	114	pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
	115	break;
	116	default:
	117	if (state->Vpp != state->Vcc) {
	118	pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
	119	ret = -1;
	120	}
	121	}
	122
	123	switch (skt->nr) {
	124	case 0: /* we only have 3.3V */
	125	board_pcmcia_power(power);
	126	break;
	127
	128	#ifndef CONFIG_MACH_TRIZEPS_CONXS
	129	/* on ConXS we only have one slot. Second is inactive */
	130	case 1:
	131	#endif
	132	default:
	133	break;
	134	}
	135
	136	return ret;
	137	}
	138
	139	static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
	140	{
	141	/* default is on */
	142	board_pcmcia_power(0x9);
	143	}
	144
	145	static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
	146	{
	147	board_pcmcia_power(0x0);
	148	}
	149
150	static struct pcmcia_low_level trizeps_pcmcia_ops = {
151	.owner = THIS_MODULE,
152	.hw_init = trizeps_pcmcia_hw_init,
2efa42f2 JS	153	.socket_state = trizeps_pcmcia_socket_state,
	154	.configure_socket = trizeps_pcmcia_configure_socket,
	155	.socket_init = trizeps_pcmcia_socket_init,
	156	.socket_suspend = trizeps_pcmcia_socket_suspend,
	157	#ifdef CONFIG_MACH_TRIZEPS_CONXS
	158	.nr = 1,
	159	#else
	160	.nr = 2,
	161	#endif
	162	.first = 0,
	163	};
	164
	165	static struct platform_device *trizeps_pcmcia_device;
	166
	167	static int __init trizeps_pcmcia_init(void)
	168	{
	169	int ret;
	170
735443fe DES	171	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
	172	return -ENODEV;
	173
2efa42f2 JS	174	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	175	if (!trizeps_pcmcia_device)
	176	return -ENOMEM;
	177
	178	ret = platform_device_add_data(trizeps_pcmcia_device,
	179	&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
	180
	181	if (ret == 0)
	182	ret = platform_device_add(trizeps_pcmcia_device);
	183
	184	if (ret)
	185	platform_device_put(trizeps_pcmcia_device);
	186
	187	return ret;
	188	}
	189
	190	static void __exit trizeps_pcmcia_exit(void)
	191	{
2efa42f2 JS	192	platform_device_unregister(trizeps_pcmcia_device);
	193	}
	194
	195	fs_initcall(trizeps_pcmcia_init);
	196	module_exit(trizeps_pcmcia_exit);
	197
	198	MODULE_LICENSE("GPL");
	199	MODULE_AUTHOR("Juergen Schindele");
	200	MODULE_ALIAS("platform:pxa2xx-pcmcia");